Search Results — 2000 specimen records retrieved (1615 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC78035  Abies concolor Clare B. Hardham 1969-8-28 s.n. Lassen west of Janesville Comment
  CAS-BOT-BC78036  Abies concolor John Thomas Howell 1976-7-19 51966 Lassen Gold Run Creek southwest of Susanville 1386 Comment
  CDA19039  Abies concolor Mark Lubinski 2000-10-12 PDR 070105 Lassen Sierra Nevada; 1 mi W on State Route 44 and 36. 0 Comment
  CHSC13792  Abies concolor Anne Linda Brisk 1969-7-2 33 Lassen Growing along the shore of Mohogany Lake. Comment
  RSA518546  Abies concolor F. C. Vasek 1976-9-3 760903 -A Lassen 5 miles W of Susanville, N of State Highway 44 at a point 1/4 mile N of junction with State Highway 36. Comment
  CHSC13794  Abies magnifica Cathy Crittenden 1970-7-9 39 Lassen 2 1/2 miles east of Antelope Mtn. lookout on road to Eagle Lake Resort. 1981 Comment
  CAS-BOT-BC330610  Acer glabrum var. glabrum Clare B. Hardham 1969-8-28 17438 Lassen Sierra Nevada. West of Janesville. Comment
  CHSC68838  Acer glabrum var. torreyi Vernon Oswald; Lowell Ahart 1997-6-24 8607 Lassen South of Susanville on the north side of Diamond Mtn. At a springy slope with streamlets along Forest Rd.29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary 1889 Comment
  CAS-BOT-BC28646  Achillea millefolium Margaret Williams 1974-7-27 74 -L-70 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70. 1493 Comment
  CAS-BOT-BC28650  Achillea millefolium Albert Michael Vollmer; L. Beane 1953-7-1 97 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  UC1125421  Achillea millefolium A. Simontacchi 1940-6-13 826 Lassen 3.3 mi wsw Patterson Mtn.; Halls Flat Quad. 1752 Comment
  CHSC93660  Achnatherum hymenoides Lowell Ahart; John Dittes 2005-6-2 11996 Lassen Along a small wash, east side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  CAS-BOT-BC216444  Achnatherum occidentale subsp. californicum 1927-6-25 29 Lassen Unspecified 1706 Comment
  POM115575  Achnatherum occidentale subsp. occidentale Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  RSA582082  Achnatherum occidentale subsp. occidentale J. T. Howell 1934-7-6 12431 Lassen Hall's Flat. Comment
  UC1024688  Achnatherum occidentale subsp. occidentale Leo Whitney 1933-7-15 2157 Lassen 16 mi w of upper end of Eagle Lake; Lassen National Forest, Harvey Montain Comment
  UC1133257  Achnatherum occidentale subsp. occidentale H. P. Hagge 1929-9-17 38 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC717977  Achnatherum occidentale subsp. occidentale David D. Keck 1944-7-8 5451 Lassen 1.5 mi w Susanville (rim of plateau overlooking Susan River canyon); Sierra Nevada, Susan River 1341 Comment
  UC1137654  Achnatherum occidentale subsp. pubescens George A. Fischer and Irwin H. Johnson 1933-7-12 218 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen National Forest 1722 Comment
  UC1143012  Achnatherum occidentale subsp. pubescens August L. Hormay 1934-6-30 Lassen Harvey Mtn. Lassen National Forest 2133 Comment
  UCD51194  Achnatherum occidentale subsp. pubescens L. Whitney 1935-6-24 s.n. Lassen Squaw Valley. Comment
  CHSC29880  Achnatherum thurberianum Robin L. Ondricek 1978-6-8 47 Lassen Ridge E of Lower Dry Lake. 1798 Comment
  SEINET229581 Image available Achnatherum thurberianum Gary Schoolcraft 1982-6-22 722 Lassen North end of Fort Sage Mountains Comment
  UCD51444  Achnatherum thurberianum R. Tofsrud 1947-7-1 223 Lassen Between Ravendale and Thermos. Comment
  UC1037345  Achnatherum webberi Leo Whitney 1935-7-3 3587 Lassen Ashurst Mt. Comment
  JEPS120844  Acmispon denticulatus Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18746 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS121257  Acmispon denticulatus Lowell Ahart, John Dittes 2013-7-23 18888 Lassen 40 yards S of the man-made pond, about 110 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CAS-BOT-BC412873  Aconogonon davisiae Lassen 1927 G. S. Crew 1927-6-25 31 Lassen Lassen National Forest. Norval Flat 1747 Comment
  CAS-BOT-BC412871  Aconogonon davisiae Brighton C. Cain 1925-8-25 127 Lassen Horse trail from summit of Mt. Lassen to Drakesbad, Mt. Lassen Volcanic National Park Comment
  CAS-BOT-BC391608  Actaea rubra Louella Bass 1973-6-17 119 Lassen Elysian Valley 1325 Comment
  SEINET4339237  Aegilops triuncialis G. Schoolcraft 1997-6-26 2603 Lassen 1.2 mile north of Susanville, west of Highway 395 1326 Comment
  CHSC21954  Agastache parvifolia Robert A. Schlising 1974-7-19 3152 Lassen SE of Eagle Lake, about 1.1 mi from Eagle Lake Field Station along dirt road. Comment
  CHSC26987  Agastache parvifolia J. D. Prouty 1978-9-17 Lassen Bald Hills, North Shore Eagle Lake. Comment
  CHSC9544  Agastache parvifolia L. E. Ray 1967-6-25 53 Lassen Coll. ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  JEPS28682  Agastache parvifolia George W. Gillett 1957-7-26 909 Lassen along e shore Butte Lake (Butte Lake, Lassen Volcanic National Park); Lassen Volcanic National Park, Butte Lake 1859 Comment
  JEPS87414  Agastache parvifolia Vernon H. Oswald and Lowell Ahart 1993-6-28 5619 Lassen e Poison Lake (n of Hwy 44 along Rd 33N47 at the ne end of Little Harvey Valley, between Champs Flat and Harvey Valley, bordering Pine Creek); ne end of Little Harvey Valley, Pine Creek 1737 Comment
  OBI77068  Agastache urticifolia Anthony Baniaga 2011-7-5 417 Lassen Lassen NF. E of Willard Crk Fredonyer Pass quad T29N R10E sec 25 NE of NW 1473 Comment
  UC1483811  Agastache urticifolia G. Schoolcraft 1979-7-5 122 Lassen n face Observatioin Peak; n face of Observation Peak 1828 Comment
  POM147886  Agastache urticifolia J. B. Feudge 1927-7-20 1754 Lassen Westwood Comment
  POM1922B  Ageratina occidentalis Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC1483833  Ageratina occidentalis G. Schoolcraft 1979-8-15 180 Lassen Tule Mountain area Tule Mountain 2042 Comment
  CAS-BOT-BC30233  Ageratina occidentalis Hans Leschke 1964-9-4 1894 Lassen Lassen Highway near Diamond Point Comment
  CHSC60711  Agoseris glauca var. glauca Vernon H. Oswald; Lowell Ahart 1993-6-14 5530 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518,33N89). 1566 Comment
  CHSC59071  Agoseris glauca var. monticola Vernon Oswald; Lowell Ahart 1992-8-25 5181 Lassen Lassen Volcanic National Park. Near Grassy Creek at the S end of Snag Lake, at the junction of Snag Lake-Butte Lake and Snag Lake-Horseshoe Lake trails. 1865 Comment
  UCD128593  Agoseris grandiflora G. Schoolcraft 2000-6-19 2904 Lassen Susanville; west of Cold Spring Valley. 1706 Comment
  CHSC66231  Agoseris heterophylla Vernon Oswald; Lowell Ahart 1996-6-24 7860 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  POM34510  Agoseris heterophylla Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  UC585117  Agoseris heterophylla var. heterophylla E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1774 Lassen dry sandy wash Red Rock 1280 Comment
  UC773952  Agoseris parviflora L. R. Short and J. Warren 1936-6-5 S- 372 Lassen Burgess Spring Experiment Range Burgess Spring Experiment Range 1798 Comment
  SEINET10789617  Agropyron cristatum John Thomas Howell 1961-9-25 Howell 36970 Lassen East side of Beckwourth Pass. Sierra Nevada. 1554 Comment
  SEINET10551977  Agropyron elongatum John Thomas Howell 1975-7-23 Howell 51409 Lassen Along Hwy 395 between Johnstonville and Janesville. Densely cespitose. 1280 Comment
  SEINET7297772 Image available Agrositanion John Thomas Howell 1976-1 52002 Lassen Open juniper-Jeffrey pine woodland on basaltic rock, about 5 miles west of Fredonyer Pass near confluecne of Susan River and Willard Creek. 1433 Comment
  UC1130648  Agrostis alba H. S. Yates 1936-8-11 6069 Lassen Baxter Creek Susanville Quadrangle Comment
  CAS-BOT-BC127237  Agrostis exarata John Thomas Howell; Gordon H. True 1973-7-31 50021 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1737 Comment
  CAS-BOT-BC127239  Agrostis exarata John Thomas Howell; Gordon H. True 1973-8-1 50182 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  RSA0105582  Agrostis exarata Lowell Ahart, John Dittes 2013-7-22 18858 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA129563  Agrostis exarata L. R. Short 1936-8-21 499 Lassen Burgess Spr. Exp. Range. 1799 Comment
  UC53515  Agrostis exarata M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley Comment
  UC589901  Agrostis exarata H. S. Yates 1936-8-11 6067 Lassen Baxter Creek Susanville Quad., Baxter Creek Comment
  CAS-BOT-BC139450  Agrostis hyemalis Leo Whitney 1933-8-4 2228 Lassen Meadow near Sheepshead. 1889 Comment
  UC725737  Agrostis idahoensis A. A. Heller 1942-9-7 16534 Lassen edge Echo Lake; edge Echo Lake Comment
  CHSC58860  Agrostis pallens Vernon H. Oswald; Lowell Ahart 1992-7-16 5107 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. 1745 Comment
  CAS-BOT-BC138801  Agrostis scabra John Thomas Howell 1959-9-23 34882 Lassen Lassen Park. North end of Juniper Lake. 2057 Comment
  CAS-BOT-BC138803  Agrostis scabra John Thomas Howell; Gordon H. True 1973-8-1 50178 Lassen Sierra Nevada. Gold Run Creek Road south of Susanville, Diamond Range. 1584 Comment
  RSA129202  Agrostis stolonifera H. S. Yates 1936-8-11 6069 Lassen Bexter Creek [Baxter? creek]. Susanville. 1280 Comment
  UC53478  Agrostis variabilis M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  POM313032  Alisma gramineum Malcolm A. Nobs, S. Galen Smith 1949-7-22 1074 Lassen Along Willow Creek, Willow Creek Valley, 10 miles north of Susanville Comment
  UC978578  Alisma gramineum Verne Grant and Irving Schneider 1947-7-31 8204 Lassen irrigation ditch ne quarter George Williams section 19; Madeline Plain Comment
  UCD137906  Alisma gramineum Malcolm A. Nobs; S. Galen Smith 1949-7-22 1074 Lassen along Willow Creek, Willow Creek Valley, 10 miles north of Susanville. Comment
  JEPS124714 Image available Alisma triviale P. Matteson 1968-7-9 86 Lassen 1.6 mi N of intersection of HWY 139 and Horse Lake Rd. Comment
  CHSC7661  Allium acuminatum Beverley J. Wise 1969-5-18 138 Lassen 17.0 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. 1524 Comment
  UC1483842  Allium acuminatum G. Schoolcraft 1980-6-5 250 Lassen ne side of Snowstorm Mountain Snowstorm Mountain 1584 Comment
  HSC69609  Allium anceps Gary Schoolcraft 1980-4-30 215 Lassen N base of Shaffer Mtn. near Shaffer Well 1354 Comment
  UC3055  Allium anceps Mrs. C. C. Bruce June, 1898 Lassen Madeline Plains Comment
  SEINET222604 Image available Allium anceps D. W. McNeal 1978-5-30 2127 Lassen Beside Hwy 395, 3 mi. S of Ravendale. Comment
  NY247822  Allium bidwelliae R. M. Austin 06 1879 s.n. Lassen Pine Creek Meadows. Comment
  CHSC27592  Allium campanulatum Jennifer Estep 1978-7-5 22 Lassen E side of Mahogany Lake, S of Eagle L. 2060 Comment
  CHSC30581  Allium campanulatum Sori H. Shad 1970-7-25 48 Lassen Found on the way to Papoose Valley, about 9 miles south of E. L. B. S. 1653 Comment
  HSC69593  Allium campanulatum Gary Schoolcraft 1980-7-28 340 Lassen S of Blue Lake 2043 Comment
  CAS-BOT-BC470922  Allium lemmonii G. Schoolcraft 1993-6-10 2287 Lassen Approx. 9.5 miles east of Madaline on Clark Valley Road 1828 Comment
  HSC67118  Allium lemmonii Dale McNeal 1980-6-1 2338 Lassen Beside Hwy. 139, 32.4 mi. S of junction with Hwy. 299 in Adin Comment
  SEINET10532723  Allium lemmonii David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17786 Lassen 6 miles n of hallelujah jct. On u.s. Hwy 395, in artemisia tridentata, pinyon Pine, jeffery pine along high ridge & in sandy wash 1402 Comment
  JEPS103165  Allium parvum Beth Corbin 2002-4-11 1055 Lassen Near Skedaddle Ranch Rd, ca 1/2 mi ENE of East Side Reservoir. 1493 Comment
  CHSC68887  Allium platycaule Vernon Oswald; Lowell Ahart 1997-6-24 8624 Lassen South of Susanville on the north side of Diamond Mtn. On Forest Rd. 21N52, 1.0 mi southwest of its junction with 29N43. 2164 Comment
  JEPS94546  Allium platycaule Vernon Oswald and Lowell Ahart 1997-6-24 8624 Lassen s of Susanville (on n side of Diamond Mountain on Forest Road 21N52, 1.0 mi sw of its junction with 29N43); Diamond Mountain, Forest Road 21N52 2164 Comment
  POM110002  Allium platycaule Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC474073  Allium platycaule H. D. Ripley; R. C. Barneby 1943-6-14 5733 Lassen Fredonyer Pass 1676 Comment
  CAS-BOT-BC476625  Allium tolmiei B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6563 Lassen U.S. Hwy. 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield. 1330 Comment
  CHSC26169  Alnus incana subsp. tenuifolia Detzer; Sacks 1977-7-24 2 Lassen Ca. 3 mi se Milford, .5 mi se Laufman Ranger Stn., on unimproved USFS road. 1481 Comment
  JEPS88576  Alopecurus aequalis Vernon H. Oswald and Lowell Ahart 1996-6-24 7873 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), along Papoose Creek where it leaves the n end of the meadow, Modoc Plateau); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  UCD55845  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen 10 miles W of Chester, rte 36. Comment
  CAS-BOT-BC138010  Alopecurus geniculatus Stuart K. Harris 1960-6-23 21410 Lassen Bed of Poison Lake. 1645 Comment
  UC1136824  Alopecurus geniculatus George A. Fischer and Irwin H. Johnson 1933-7-11 F 190 Lassen Dry Lake Lassen Nat'l Forest, Grass Valley, Dry Lake 1694 Comment
  CHSC68738  Alyssum minus subsp. micranthum Vernon H. Oswald; Lowell Ahart 1997-5-27 8496 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. On the north side of a creek paralleling the road. 1546 Comment
  JEPS93815  Alyssum simplex Vernon H. Oswald and Lowell Ahart 1998-6-4 9144 Lassen s of Constantia (at parking area at end of spur road on n side of Red Rock Road 0.6 mi e of Highway 395); Red Rock Road 1389 Comment
  CHSC27717  Amaranthus blitoides Robert A. Schlising 1978-7-27 3319 Lassen E of Eagle Lake and NE of Eagle L. Field Station. 1578 Comment
  CAS-BOT-BC42890  Ambrosia acanthicarpa John Thomas Howell 1961-9-25 36973 Lassen East side of Beckwourth Pass 1554 Comment
  CHSC66845  Ambrosia acanthicarpa Vernon Oswald 1996-10-3 8298 Lassen North of Susanville on Horse Lake Road (Lassen 546) 3.6 mi E of Hwy. 139. Modoc Plateau. 1554 Comment
  JEPS95745  Ambrosia acanthicarpa Vernon H. Oswald and L. Ahart 1995-8-14 7191 Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  UC1118423  Ambrosia acanthicarpa C. W. Hanks 1934-9-25 86 Lassen floor of, (near Plumas National Forest) Long Valley; Sierraville Quad., Plumas National Forest 1371 Comment
  RSA38464  Amelanchier pallida Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford. 1524 Comment
  UC1924571  Amelanchier utahensis Debra Valov 2006-5-29 2006021 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UC726025  Amelanchier utahensis A. A. Heller 1938-6-4 15144 Lassen about 1 mi e Fredonyer Pass 1706 Comment
  CAS-BOT-BC142538  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  CHSC109980  Amphiscirpus nevadensis Richard R. Halse 2010-8-25 8087 Lassen Along State Hwy. 139 ca. 26.2 miles north of Susanville on the northeast shore of Eagle Lake. 1559 Comment
  JEPS114650  Amsinckia intermedia Lowell Ahart, John Dittes 2008-6-20 14935 Lassen On the levee road, about 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  SEINET10455819  Amsinckia menziesii Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2582 Lassen 6 mi S of Adin; along CA Hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  UCD119818  Amsinckia tessellata John Thomas Howell 1934-6-10 11842 Lassen Near Plumas Junction. Comment
  UC585123  Amsinckia tessellata var. tessellata E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1747 Lassen e facing slope of gully on mountain above Red Rock 1432 Comment
  CHSC5040  Anaphalis L. B. Barlow 1967-7-4 95 Lassen 5 mi. south of Eagle Lake Biological Station on Gallatin Beach Road. 1737 Comment
  CAS-BOT-BC45257  Ancistrocarphus filagineus B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6562 Lassen US Highway 395, 6.0 km N of railroad crossing and 20.1 km N of Litchfield. 1330 Comment
  POM36284  Ancistrocarphus filagineus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC1523709  Antennaria argentea Gary Schoolcraft 1981-7-8 501 Lassen north of Coulthurst Flat 1828 Comment
  CHSC5193  Antennaria dimorpha 1945-6-1 Lassen Eagle Lake. 1584 Comment
  CHSC52381  Antennaria dimorpha B. G. Clark 1987-4-15 24 Lassen 100 ft from NE corner of undeveloped field adjacent to east of 705 Hall St, Susanville. Northern edge of city limits. 1297 Comment
  CHSC7640  Antennaria dimorpha Beverley J. Wise 1969-4-13 11 Lassen 5.6 mi east of junction of Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1463 Comment
  HSC28309  Antennaria dimorpha D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19266 Lassen Harvey Valley near Cone Springs Comment
  JEPS107971  Antennaria dimorpha Lowell Ahart, John Dittes 2005-6-1 11915 Lassen On the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  UC773914  Antennaria dimorpha L. R. Short 1936-6-8 S- 386 Lassen Burgess Sp. Exp. Range Thompson Meadow 1743 Comment
  SEINET10671600  Antennaria dimorpha David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17794 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  CAS-BOT-BC69138  Antennaria geyeri Milo S. Baker 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC69143  Antennaria geyeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49517 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC68841  Antennaria geyeri Vernon H. Oswald; Lowell Ahart 1997-7-24 8591 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). 1685 Comment
  JEPS19756  Antennaria luzuloides Rimo Bacigalupi with S. Galen Smith 1957-6-28 5996 Lassen 3.6 mi n of Madeline 1645 Comment
  UC380912  Antennaria luzuloides Marcus E. Jones, A. M. 1897-6-18 Lassen Chat 1524 Comment
  UC585069  Antennaria luzuloides E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1791 Lassen about 2 mi n Madeline 1363 Comment
  UCD169450  Antennaria luzuloides Lowell Ahart; John Dittes 2005-6-1 11862 Lassen Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. About 1/2 mile west of Scott Road, on the east side of the poor dirt road. 1448 Comment
  CHSC60811  Antennaria luzuloides subsp. aberrans Vernon H. Oswald; Lowell Ahart 1993-6-28 5589 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1719 Comment
  CHSC60304  Antennaria rosea subsp. confinis Mary Ann Showers 1992-6-13 2558 Lassen Lassen Volcanic National Park. Volcanic outcrops southwest of Widow Lake. 2072 Comment
  CHSC65289  Anthemis cotula Vernon H. Oswald; Lowell Ahart 1995-8-14 7175 Lassen Modoc Plateau. Hwy. 395 at the N end of a flooded playa (Mud Flat) 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  RSA125375  Anthoxanthum aristatum P. H. Raven, Otto T. Solbrig 1958-6-16 13228 Lassen 4.5 miles east of Westwood on Hwy 36 Comment
  CDA42997  Apera interrupta L. Ahart, John Dittes 2008-6-19 14868 Lassen About 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. Comment
  CHSC117198  Aphyllon fasciculatum Lowell Ahart; John Dittes 2016-6-7 20997 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1123464  Apocynum androsaemifolium H. P. Hagge 1929-9-12 28 Lassen Logan Mt. Eagle Lake Quad., Logan Mt. Comment
  POM75751  Apocynum pumilum var. rhomboideum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  NY119422  Arabis rectissima R. C. Rollins 1983-7-5 83227 Lassen 2 miles S of Eagle Lake Summit Comment
  JEPS53155  Arabis rectissima var. rectissima Jos. Grinnell 1928-6-16 Lassen Eagle Lake Lassen Peak Region 1584 Comment
  UC1504479  Arabis rectissima var. rectissima Reed C. Rollins and Kathryn W. Rollins 1981-5-31 81172 Lassen 2.2 mi n CA Hwy 36 junction with County Hwy A-1 Comment
  SEINET2471272  Arceuthobium abietinum R. L. Mathiasen 2008-9-15 2008 -27 Lassen 12.8 km S. of jct. of Westwood Road on State Route 44 1720 Comment
  CDA6787  Arctium minus T. C. Fuller 1959-7-7 4725 Lassen Highway 395 at Secret Creek Bridge, 3.3 miles north of road to Karlo. 0 Comment
  CDA6788  Arctium minus T. C. Fuller 1959-7-7 4725 Lassen Highway 395 at Secret Creek Bridge, 3.3 miles north of road to Karlo. 0 Comment
  RSA38477  Arctostaphylos manzanita subsp. manzanita P. A. Munz 1947-5-18 11865 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville. 1509 Comment
  CAS-BOT-BC45897  Arctostaphylos nevadensis A. H. Kramer 1930-6-9 s.n Lassen Prospect Peak, Lassen National Park Comment
  CAS-BOT-BC45904  Arctostaphylos nevadensis M. S. Jussel 1931-9-6 s.n Lassen Sulphur Works, Mt. Lassen 2133 Comment
  CAS-BOT-BC45909  Arctostaphylos nevadensis Marcus E. Jones 1897-7-7 s.n Lassen Lassen's Peak 1828 Comment
  SD43498  Arctostaphylos patula Philip A. Munz 1947-5-18 11865 Lassen Fredoyner Forestry Public Campground, W of Susanville 1509 Comment
  UC549429  Arctostaphylos patula F. Farris 1934-12-30 Lassen Diamond Mt. 1524 Comment
  CAS-BOT-BC42165  Arctostaphylos patula subsp. patula Ida M. Gifford 1933-12-27 s.n. Lassen Near Susanville 1310 Comment
  CAS-BOT-BC42166  Arctostaphylos patula subsp. patula Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16319 Lassen 2 miles E of Plumas-Lassen County line, along California Highway 36, near Westwood Comment
  CHSC25747  Arctostaphylos patula subsp. patula John Steiner 1977-6-14 73 Lassen Lassen Volcanic National Park. 250 m NE Manzanita Lake and 250 m E Lassen Park boundry. 1768 Comment
  JEPS28438  Arenaria congesta var. congesta George W. Gillett 1957-7-29 945 Lassen Along trail between Butte Lake Snag Lake; Lassen Volcanic National Park 1859 Comment
  SEINET530729  Arenaria congesta var. lithophila Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  POM101442  Arenaria congesta var. simulans Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  RSA59890  Arenaria congesta var. simulans E. K. Balls 1950-5-19 14775 Lassen 21 miles W of Madeline on road to Adin. 1372 Comment
  UC852268  Arenaria congesta var. subcongesta A. A. Heller 1938-6-23 15198 Lassen e Fredonyer Pss 1645 Comment
  NY430990  Arenaria kingii subsp. plateauensis G. Schoolcraft 1982-6-23 729 Lassen Fort Sage Mountains 1920.2 Comment
  JEPS126466  Argemone munita Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-7-7 CA 350 -061 Lassen 395 S to Laver Crossing, turn right immediately after kiosk, keep straight at intersection near the railroad crossing. Comment
  JEPS124518 Image available Argemone munita Himayat H. Naqvi 1965-7-12 144 Lassen 2.6 miles from Milford, highway 139 Comment
  UC1037334  Argemone rotundata Leo Whitney 1934-8-5 1959 Lassen 10 mi se of Susanville (Harvey Lake Valley); Harvey Lake Valley 1402 Comment
  JEPS17745  Arnica chamissonis Rimo Bacigalupi with G. T. Robbins 1955-7-20 5414 Lassen Mosquito Creek (along), in Corporation Meadow, s end of Warner Mts. Modoc National Forest, Warner Mts., Corporation Meadow, Mosq 2042 Comment
  POM253188  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mile east of Fredonyer Pass on hwy 36 1707 Comment
  RSA32851  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen More or less shaped gravelly slope in the yellow pine forest 1 mile east of Fredonyer Pass, on State Hwy #36 1738 Comment
  CHSC27166  Arnica dealbata J. D. Prouty 1978-7-27 31 Lassen 2.4 mi w of jct with road A-1 on n side of Merrill Flat Rd, s of Eagle Lake. 1740 Comment
  JEPS21729  Arnica dealbata Franklin P. Nutting Lassen mts s Eagle Lake Eagle Lake Comment
  CHSC77183  Arnica parryi subsp. sonnei G. Schoolcraft 1994-8-2 2400 Lassen About 2 miles west of Boot Lake. 2286 Comment
  JEPS109852  Arnica sororia Dean W. Taylor 2006-6-29 19559 Lassen Longs Cabin (ca. 12 air miles NE of Old Station) 1783 Comment
  JEPS103204  Arnica sororia G. Schoolcraft 1994-6-9 2346 Lassen West of Hwy. 139 near Grasshopper valley 1706 Comment
  JEPS103219  Arnica sororia G. Schoolcraft 1993-6-19 2298 Lassen Ash Valley RNA between Adin and Madeline, CA. 1600 Comment
  UCD129188  Artemisia arbuscula F. C. Raney 1966-6-25 s. n. Lassen Harvey Valley, Lassen National Forest. Comment
  CAS-BOT-BC85002  Artemisia arbuscula subsp. arbuscula James Vale; Keith Wagnon; Walter Knight; Irja Knight 1981-5-20 4117 Lassen 81 miles south of Alturas in Lassen County. Comment
  UC1137582  Artemisia arbuscula subsp. arbuscula A. Simontacchi 1940-9-16 947 Lassen 1.3 mi ne of Ebey Lake; Lassen National Forest, Halls Flat Quadrangle 1691 Comment
  UC773844  Artemisia arbuscula subsp. arbuscula L. R. Short 1936-9-30 S- 506 Lassen Burgess Spring Experimental Range Lassen National Forest, Burgess Spring Experimental Range 1746 Comment
  CHSC118472  Artemisia arbuscula subsp. thermopola Don Lepley 2016-7-31 Lassen Between Feather Lakes and Highway 44, approximately 5 air miles southeast of Bogard Rest Area; a little less than a third of a mile north of railroad crossing on Highway 44. 40N31:50.1 x 121W01:51.8. 1748 Comment
  UC1119576  Artemisia cana subsp. bolanderi A. Simontacchi 1940-9-16 950 Lassen 1.3 mi ne Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD159571  Artemisia douglasiana D. S. Park 2011-6-27 308 Lassen East of Westwood. Growing near Willard Creek. 1471 Comment
  SEINET6775481 Image available Artemisia dracunculus G. Schoolcraft 1992-8-11 2248 Lassen Near intersection of Wingfield and Bass Hill Roads 1323 Comment
  JEPS127351  Artemisia ludoviciana subsp. ludoviciana Lowell Ahart, John Dittes 2016-7-13 21105 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  RSA523927  Artemisia ludoviciana subsp. ludoviciana G. H. True 1937-7-10 783 Lassen Bull Flat, Refuge 1Q 1524 Comment
  RSA719608  Artemisia nova A. Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 miles north of Karlo Road on highway 395 from Litchfield to Alturas, just east of highway 1402 Comment
  SEINET251695  Artemisia nova Arnold Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 Rd miles N of Karlo Rd. on highway 395 from Litchfield to Alturas, Just E of the highway. 1402 Comment
  RSA758317  Artemisia tridentata subsp. tridentata Doug Goldman 2004-11-5 2935 Lassen To the southwest side of Route 395, around 0.75 miles southwest of Honey Lake 1256 Comment
  SEINET195654  Artemisia tridentata subsp. vaseyana G. Thomas Robbins 1945-10-7 2155 Lassen Lassen National Forest; Harvey Mountain, 2-3 miles northeast of burgess Spring, Harvey Valley 1676 Comment
  HSC3295  Asclepias cordifolia H. E. Parks, S. T. Parks Jun 1928 226 Lassen Lassen National Park, Drakesbad 1982 Comment
  CHSC117492  Asclepias fascicularis Lowell Ahart; John Dittes 2016-7-13 21150 Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills of the southern slope of Big Valley. 1289 Comment
  CHSC6222  Asclepias fascicularis M. West 1946-7-10 Lassen Pine Creek, Eagle Lake. 1584 Comment
  JEPS127355  Asclepias fascicularis Lowell Ahart, John Dittes 2016-7-13 21150 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  UC1537161  Asclepias fascicularis Gordon H. True Jr. 1937-7-10 787 Lassen between Bull Flat and Skeedaddle 1493 Comment
  JEPS124871 Image available Asclepias speciosa Peter Schultz 1967-7-11 71 Lassen 1 mile south of Milford on U. S. 395. Comment
  POM261533  Aster eatonii Alice Eastwood 1912-8-22 1918 Lassen Battle Creek Meadows, Lassen Butte Region Comment
  CHSC66718  Aster elatus Vernon H. Oswald; Lowell Ahart 1996-8-1 8120 B Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. 1737 Comment
  POM45145  Astragalus accidens var. hendersonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  RSA0006691  Astragalus accidens var. hendersonii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 108749 Lassen South of Constantia. 1463 Comment
  RSA0006693  Astragalus agrestis H. D. Ripley, R. C. Barneby 1944-5-30 5976 Lassen North of Termo; 1662 Comment
  NY791373  Astragalus andersonii G. Schoolcraft 1982-6-22 725 Lassen North end of Ft. Sage Mountains 1585.0 Comment
  POM45143  Astragalus andersonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  NY791369  Astragalus andersonii M. J. Williams 1974-8-4 74-L- 83 Lassen About 2 miles west of Highway 395, near Highway 70 1493.5 Comment
  HSC42428  Astragalus anxius Barbara Kelly 1977-8-9 558 Lassen 16 1/4 mi. E of Madeline on the dirt road from Adin Comment
  NY790602  Astragalus argophyllus var. argophyllus A. Tiehm 1986-5-12 10347 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  CAS-BOT-BC178762  Astragalus canadensis var. brevidens John Thomas Howell 1934-7-8 12504 Lassen Spalding's, Eagle Lake Comment
  RSA0028049  Astragalus curvicarpus John F. Emmel 1996-7-14 1423 Lassen North base of Ft. Sage Mts., south edge of Honey Lake Valley; gently sloping sandy flats 0.2-0.3 air mile north and 0.15-0.3 air mile east of 4818 ft. peak of Turtle Mtn. 1280 Comment
  RSA111041  Astragalus curvicarpus H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5676 Lassen N or Doyle. 1265 Comment
  RSA152593  Astragalus curvicarpus I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16331 Lassen 13.5 mi. E of Susanville. Comment
  RSA60316  Astragalus curvicarpus E. K. Balls 1950-5-9 15949 Lassen 6 miles south of Doyle, Hwy 395. 1372 Comment
  SEINET948261  Astragalus curvicarpus Ira. L. Wiggins, Dorothy B. Wiggins 1961-1 16331 Lassen Gravelly slopes at margin of grain field 13.5 mi. E of Susanville, sec 36 Comment
  CAS-BOT-BC177847  Astragalus curvicarpus var. curvicarpus Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16331 Lassen 13.5 mi. E of Susanville Comment
  CHSC64875  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald 1995-6-26 6923 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  CHSC7676  Astragalus curvicarpus var. curvicarpus Beverly J. Wise 1969-5-18 53 Lassen 7.7 mi. East of Susanville on the south side of Las. Co. Rd. 215. 1341 Comment
  CAS-BOT-BC177842  Astragalus curvicarpus var. curvicarpus M. E. Jones 1897-6-24 s.n. Lassen 10 to 15 mi. w. of Amedee 1219 Comment
  CDA26665  Astragalus filipes G. D. Barbe 1982-7-12 3873 Lassen East base of Dry Valley Ridge along Westside Road, 3 miles north of Dry Valley Gap (Thermo-Grasshopper Road), Madeline Plains. Comment
  CHSC5279  Astragalus filipes L. Harman 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  HSC100805  Astragalus filipes Lowell Ahart, John Dittes 2010-7-31 16976 Lassen 100 yd. NE of where the road crosses Hunsinger Draw, 1.9 (air) mi. NW of Moll Reservoir, 2.8 (air) mi. W of Ash Valley, and 8.4 (air) mi. SE of Adin. 1521 Comment
  SEINET225940 Image available Astragalus filipes M. Lavin, K Lavin 1982-5-16 4069 Lassen 1.5 mi E of Halleujah Jct. (US 395), 22 air mi 325 degrees from Reno, W side of Peterson Mts 1676 Comment
  UC13367  Astragalus filipes M. S. Baker and Frank Nutting 1894-6-20 Lassen Big Valley Comment
  UCD104697  Astragalus filipes Ellen Dean 2006-5-15 3061 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1249 Comment
  SEINET10903957  Astragalus filipes Williams 1983-7-31 Williams 83 -125-1 Lassen Ash valley road, 17 mi from aden. 1829 Comment
  UCD104699  Astragalus filipes Michael A. Vincent 1999-6-9 8579 Lassen Bureau of Land Management land; Madeline Plains. Southwest of US Rt. 395, southeast of CR 515 (Termo Road), south of BLM Rd. 1614, and southwest of Termo. Along jeep road to Schott Canyon. Comment
  CDA19718  Astragalus gibbsii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat. 1341 Comment
  NY674268  Astragalus gibbsii G. Schoolcraft 1993-6-8 2285 Lassen US Highway 395 at Airport Road 1274 Comment
  SEINET3142990  Astragalus gibbsii E. K. Balls 1950-5-9 15949 Lassen 6 mi S of Doyle, Hwy 395 1372 Comment
  POM24782  Astragalus gibbsii Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 6 miles below Eagle Lake. Comment
  RSA110069  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5692 Lassen South of Milford. 1433 Comment
  RSA110067  Astragalus gilensis H. D. Ripley, R. C. Barneby 1944-5-29 5951 Lassen Container 1372 Comment
  CAS-BOT-BC186912  Astragalus inversus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CHSC98246  Astragalus inversus Allison Sanger 2003-6-25 Lassen Halls Flat, west of Road 33N13, roughly 3 air miles north-northwest of Swains Hole and 8 miles east-northeast of Old Station. 1676 Comment
  POM180437  Astragalus inversus T. S. Brandegee 1892-7-1 s.n. Lassen Susanville Comment
  CHSC64785  Astragalus iodanthus var. diaphanoides Vernon H. Oswald 1995-5-24 6763 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. 1249 Comment
  CAS-BOT-BC229045  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  CAS-BOT-BC229048  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  CAS-BOT-BC229052  Astragalus lemmonii Alice Eastwood; John Thomas Howell 1940-6-11 7962 Lassen Eastern Fall River Valley Comment
  JEPS123847  Astragalus lemmonii Lowell Ahart, John Dittes 2015-7-14 20336 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  JEPS87395  Astragalus lentiginosus var. floribundus Vernon H. Oswald and Lowell Ahart 1993-7-8 5663 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi n Hwy 44 (se edge Poison Lake); se edge Poison Lake 1709 Comment
  RSA109610  Astragalus lentiginosus var. platyphyllidius H. D. Ripley, R. C. Barneby 1943-6-14 5744 Lassen Hidden Valley E of Susanville 1311 Comment
  CAS-BOT-BC187331  Astragalus lentiginosus var. salinus Alice Eastwood; John Thomas Howell 1940-6-16 8335 Lassen Near Susanville Comment
  SBBG128879  Astragalus lentiginosus var. salinus L. Ahart 2011-6-20 17510 Lassen near edge of Ash Valley Rd, 3120 feet S of Ash Crk Cmpgrd, ca. 6.5 mi (air) SE of Adin 1511 Comment
  HSC63126  Astragalus malacus Teresa Prendusi 1980-4-28 1101 Lassen Rice Canyon 1341 Comment
  SEINET10486634  Astragalus malacus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2599 Lassen Hallalujah jct intersection of us hwy 395 & calif hwy 70; in open waste area Adjacent to artemisia tridentata community. 1433 Comment
  UC1128893  Astragalus obscurus A. Simontacchi 1940-5-17 748 Lassen 1.1 mi ssw Dixie Spring (Lassen National Forest); Halls Flat Quad., , ssw of Dixie Sprin Comment
  UC1128861  Astragalus pulsiferae E. Sawyer 1935-6-27 237 Lassen Long Valley Sierraville Quad., Long Valley Comment
  CHSC91331  Astragalus pulsiferae var. pulsiferae Lowell Ahart; John Dittes 2005-6-1 11871 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  UCD105194  Astragalus pulsiferae var. pulsiferae John Thomas Howell 1955-7-19 30818 Lassen East side of Bechwourth Pass, Sierra Nevada. 1493 Comment
  HSC28311  Astragalus purshii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19269 Lassen Harvey Valley near Cone Springs Comment
  SEINET10452237  Astragalus purshii Mary Susan Taylor 1974-1 Taylor 257 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC57280  Astragalus purshii var. lagopinus Mary Meyer 1980-7-14 Lassen Ash Valley. 1524 Comment
  RSA0007957  Astragalus purshii var. lectulus H. D. Ripley, R. C. Barneby 1944-5-30 5983 Lassen 2 miles N of Madeline. 1707 Comment
  CAS-BOT-BC194088  Astragalus purshii var. purshii Marcus E. Jones 1897-6-28 s.n. Lassen Perkin's Ranch, top of Diamond Mt., Susanville 2225 Comment
  RSA121820  Astragalus purshii var. purshii K. e. Bradshaw 1939-5-27 235 Lassen Black Mountain Experimental Forest, Plot 39-1. 1753 Comment
  UC1601984  Astragalus purshii var. tinctus Mrs. R. M. Austin 1879-1 Lassen Comment
  NY701850  Astragalus whitneyi var. siskiyouensis B. J. Ertter 1987-6-16 7183 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  RSA517335  Astragalus whitneyi var. siskiyouensis Barbara J. Ertter, Gary Schoolcraft 1987-6-16 7183 Lassen Skeedaddle Mountains on NE side of Honey Lake 2134 Comment
  UC1567401  Astragalus whitneyi var. whitneyi G. Schoolcraft 1989-6-19 1915 Lassen Ash Valley RNA/ACEC 1554 Comment
  CHSC110306  Atriplex confertifolia L. P. Janeway; B. Castro 2012-7-2 10924 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake; 0.6 km west of Wendel Road, 4.8 air km southeast of Wendel. 1221 Comment
  JEPS29746  Atriplex confertifolia Rimo Bacigalupi and L. R. Heckard 1962-5-28 8501 Lassen along road from U.S. 395 past Wendel and Flanagan to Pyramid Lake, Nevada, 2 mi e Wendel junction (n of Honey Lake); , e of Wendel junction 1219 Comment
  JEPS94696  Atriplex gmelinii var. gmelinii Vernon H. Oswald and Lowell Ahart 1998-9-8 9581 Lassen 2.2 mi n of Bieber (on County Road 91 (Bieber-Lookout Road)); Ash Creek and Big Swamp, County Road 91 1258 Comment
  UCR183190  Balsamorhiza deltoidea Jim Andre, G. L. Clifton 1993-5-28 7711 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  CDA10419  Balsamorhiza hirsuta T. C. Fuller 1963-6-11 10663 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  JEPS94113  Balsamorhiza hookeri Vernon H. Oswald and Lowell Ahart 1998-5-22 90889 Lassen Hwy. 36 between Fredonyer Summit and Susanville (0.4 mi. w. of the Susan R. & Bizz Johnston Trail) 1417 Comment
  CAS-BOT-BC106490  Balsamorhiza hookeri Ella Dales Cantelow 1941-5-22 3550 Lassen Fredonyer Pass, 13 1/2 mi. w. of Susanville Hwy #36 Comment
  CHSC31967  Balsamorhiza sagittata Wayne O. Baum 1971-6-21 71 -30 Lassen S. slope of Gallatin Peak. 2042 Comment
  UC1119027  Balsamorhiza sagittata H. P. Hagge 1929-9-11 20 Lassen Logan Mtn. Eagle Lake Quad. 1828 Comment
  CAS-BOT-BC16437  Barbarea orthoceras George Wilson Gillett 1957-7-21 868 Lassen Lassen Volcanic National Park. Juniper Lake - Cameron Meadow trail. 300 yards north of trail summit. 2118 Comment
  NY119710  Barbarea orthoceras N. H. Holmgren 1978-6-11 8919 Lassen Vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28 km (17.4 mi.) E of Ravendale and 22.5 km (14 mi.) airline distance 1680 Comment
  RSA79262  Bassia hyssopifolia E. K. Balls 1952-10-10 18137 Lassen 0.7 miles E of Standish, Hwy 395, between Susanville and Alturas. 1250 Comment
  JEPS121246  Beckmannia syzigachne Lowell Ahart, John Dittes 2013-7-22 18871 Lassen 40 yards S of the man-made pond, about 110 yards N of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SEINET10661222  Beckmannia syzigachne Lowell Ahart, John Dittes 2008-6-20 Ahart 14946 Lassen T39N, R8E, northeast 1/4 Section 34. About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  SJSU9993  Beckmannia syzigachne C. L. Kline 1965-7-13 195 Lassen 1.8 mi E of Nubieber on Highway 299 2493 Comment
  JEPS113921  Berteroa incana William Harnach 2006-5-31 1229 Lassen Approx 5.5 north of Hwy 70 on Scott Road (Anderson Ranch). Comment
  CHSC29876  Berula erecta Robin L. Ondericek 1978-8-8 119 Lassen In water above the dam at Murrers Upper Meadow. 1548 Comment
  NY526245  Betula glandulosa B. M. Bartholomew 1988-7-22 4500 Lassen Mosquito Creek, ca. 2 km. southwest of Patterson Meadow, southern end of the Warner Mountain. 2080 Comment
  CHSC5031  Bistorta bistortoides L. B. Barlow 1967-7-14 121 Lassen Along Susan River, W. side Calif. State Highway 44. 5 mi. S. Silver Lake Rd. 1828 Comment
  CHSC117222  Blepharipappus scaber Lowell Ahart; John Dittes 2016-6-7 20977 Lassen 20 yards west of the pond, along the road to the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC4444  Blepharipappus scaber K. R. Stern 1967-7-1 2444 Lassen Murrer Meadow Road, ca. 2.5 mi SE of Eagle Lake Biology Station. 1554 Comment
  CHSC4779  Blepharipappus scaber R. Carter 1967-6-27 555 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology station. 1584 Comment
  JEPS108588  Blepharipappus scaber L. P. Janeway 2005-7-4 8462 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  JEPS126561  Blepharipappus scaber Lowell Ahart, John Dittes 2016-6-7 20977 Lassen About 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  SFV3785  Blepharipappus scaber I. L. Wiggins, D. B. Wiggins 1961-6-11 16355 Lassen East of Eagle Lake, 2 miles north of Susanville. Roadside. 1340 Comment
  UC577280  Blepharipappus scaber David D. Keck and J. Clausen 1935-6-24 3733 Lassen 2 mi s of Ravendale 1463 Comment
  OBI48164  Blepharipappus scaber Rhonda Riggins 1989-4-27 1640 Lassen US 395, 8.4 mi N Litchfield, 26.6 mi S Ravendale 1311 Comment
  RSA647521  Blepharipappus scaber Marion P. Harthill 1972-6-17 806 Lassen Ravendale. 1646 Comment
  SFV7758  Blepharipappus scaber T. Gordon, K. Kimbrough 1975-8-15 1210 Lassen 16 miles south of Adin. 1402 Comment
  SEINET7379359 Image available Blepharipappus scaber subsp. scaber J. A. Young 1982-6-9 s.n. Lassen Myers Ranch, Adin 1372 Comment
  JEPS53205  Boechera Leland S. Smith 1918-5-11 924 Lassen Hayden Hill Modoc Forest Comment
  UC2046023  Boechera lincolnensis Barbara L. Wilson with Richard Brainerd, Danna Lytjen, Bruce Newhouse and Nick Otting 2004-8-24 11189 Lassen Snowstorm Creek, at a spring; upstream of Biscar Reservoir, west of an old railroad right of way. Comment
  JEPS53091  Boechera pauciflora Jos. Grinnell 1928-6-16 Lassen Eagle Lake 1584 Comment
  UC1608995  Boechera pinetorum Vernon H. Oswald and Lowell Ahart 1993-6-3 5488 Lassen between Poison Lake and Susanville (Champs Flat Rd (Lassen 105, Forest 32N28Y), 7.0 mi n of its junction with Lassen 21 (32N02) to Eagle Lake, just s of ford over Pine Cr.) 1688 Comment
  CHSC75356  Boechera puberula Vernon H. Oswald 1999-5-7 9725 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the S side of the trail just E of Devils Corral Trailhead. 1420 Comment
  CAS-BOT-BC14637  Boechera rectissima John Thomas Howell; Gordon H. True 1973-7-31 50063 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  CHSC91294  Boechera retrofracta Lowell Ahart; John Dittes 2005-6-2 11926 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  JEPS118280  Boechera retrofracta Lowell Ahart, John Dittes 2011-6-20 17509 Lassen Graded edge of the Ash Valley Road, 3,120 feet south of Ash Creek Campground, about 6.5 miles (air) southeast of Adin 1511 Comment
  JEPS111471  Boechera retrofracta B. A. Roy, J. W. Kirchner 1996-5-11 Lassen SE of Susanville, off highway 36. 9.8 miles up Gold Run Road (follow Richmond Rd. (E) to Gold Run Road (E) on side of Diamond Mtn. Comment
  JEPS88209  Boechera sparsiflora Vernon H. Oswald and Lowell Ahart 1996-6-17 7774 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36, slope at the bridge spanning the Susan R. on n. side of Hwy 36); Modoc Plateau, Bizz Johnson Trail 1432 Comment
  UC1126562  Boechera sparsiflora H. P. Hagge 1929-9-19 40 Lassen Logan Mtn. Eagle Lake Quad. 1828 Comment
  UC1542746  Boechera sparsiflora Barbara Ertter with Gary Schoolcraft 1987-6-16 7180 Lassen ca 1 mi w Hot Springs VABM (ne side of Honey Lake); Skeedaddle Mountains 1828 Comment
  JEPS111475  Boechera sparsiflora B. A. Roy, J. W. Kirchner 1996-5-11 Lassen At intersection of Yellow Pine and Pine Needle. Drives up Jaynesville Grade, near Jaynesville (off highway 395 about 1 mile). Comment
  RSA166295  Boisduvalia glabella Peter H. Raven, Otto T. Solbrig 1958-6-17 13289 Lassen U. S. Highway 395, 1.8 miles south of Ravendale. Comment
  RSA0011460  Boisduvalia macrantha Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46980 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  JEPS103163  Bolboschoenus maritimus B. Corbin and D. Armentrout 2002-9-4 1098 Lassen Biscar Reservoir, upper pond. 1357 Comment
  CHSC76305  Bolboschoenus maritimus subsp. paludosus Lowell Ahart; Vernon H. Oswald 1999-9-13 8221 Lassen On the edge of a flooded field, just south of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  SD197665  Brickellia microphylla G. K. Helmkamp 1990-9-23 B 15 Lassen Modoc Plateau: Susanville. 1189 Comment
  UCD57489  Bromus briziformis A. A. Beetle 1944-8-16 3017 Lassen On east side of Horse Lake. Comment
  CAS-BOT-BC149585  Bromus carinatus var. carinatus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin's Ranch. 1463 Comment
  CDA31386  Bromus carinatus var. carinatus D. R. Hill 1968-7-8 Lassen James R. Reynolds ranch, Revendale. 0 Comment
  CAS-BOT-BC149158  Bromus carinatus var. marginatus John Thomas Howell; Gordon H. True 1973-8-1 50199 Lassen Sierra Nevada. Ca. 3 miles southeast of Disamond Mountain. East slope of Diamond Range south of Susanville. 2194 Comment
  UCD59149  Bromus carinatus var. marginatus H. P. Hagge 1929-9-16 s.n. Lassen Logan Mtn. 1828 Comment
  POM115036  Bromus catharticus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CAS-BOT-BC155941  Bromus commutatus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49519 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  JEPS109643  Bromus commutatus Dean W. Taylor 2002-6-21 18169 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 Comment
  JEPS96125  Bromus commutatus Vernon H. Oswald and Lowell Ahart 1996-6-17 7788 Lassen 7 mi w of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy 36, trail at hwy 36 bridge spanning Susan River); Modoc Plateau, Bizz Johnson Trail 1402 Comment
  UC1024715  Bromus hordeaceus Leo Whitney 1935-5-20 3098 Lassen 14 mi w of Eagle Lake (Lassen National Forest, Harvey Valley, near dam); Lassen National Forest, Harvey Valley 1737 Comment
  JEPS103200  Bromus japonicus G. Schoolcraft 1995-6-6 2492 Lassen Antelope Spring N of Skedaddle Mountains 1524 Comment
  SEINET10717734  Bromus japonicus Vernon H. Oswald, Lowell Ahart 1999-6-9 Oswald 9750 Lassen T31N R15E SE 1/4 Sect. 18. Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Comment
  UC1024947  Bromus madritensis subsp. rubens Leo Whitney 1935-6-21 3322 Lassen 13 mi w of n end of Eagle Lake (Squaw Valley); Squaw Valley Comment
  RSA126867  Bromus marginatus G. A. Fischer, I. H. Johnson 1933-7-12 F 231 Lassen Patterson Flat. Lassen Forest. Comment
  UCD59065  Bromus orcuttianus L. Whitney 1935-6-25 s.n. Lassen Ashurst Mt. Comment
  CHSC112781  Bromus tectorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18751 Lassen Drainage filled with dirt from the construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  HSC79991  Bromus tectorum William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UCD59756  Bromus tectorum August L. Hormay 1932-5-20 s.n. Lassen Lassen National Forest. Hat Creek. Comment
  SEINET10515057  Bromus tectorum Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3117 Lassen 6 mi n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC438313  Calandrinia ciliata H. D. Ripley; R. C. Barneby 1942-6-14 5736 Lassen Westwood 1554 Comment
  RSA128308  Callitriche hermaphroditica P. H. Raven, Otto T. Solbrig 1958-6-17 13260 Lassen Along U.S. Hwy 395, 2.1 miles NE of Standish. Comment
  JEPS120868  Callitriche heterophylla Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18750 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA233787  Callitriche verna R. F. Thorne, C. W. Tilforth 1969-9-5 39133 Lassen Said Valley Reservoir: Near junction of Grasshopper Road and Highway 139. 1433 Comment
  SEINET3828391  Callitriche verna R. F. Thorne, Larry E. De Buhr 1975-1 46986 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CAS-BOT-BC332740  Callitriche verna R. F. Thorne; Larry E. DeBuhr 1975-8-22 46986 Lassen Along Hwy 395 ca 6 miles N of Medeline and 4.5 miles S of Modoc county line 1615 Comment
  RSA67251  Calocedrus decurrens Philip A. Munz 1951-9-15 16965 Lassen On dry flats, 6 mi west of Bieber. 1341 Comment
  SEINET8196128  Calochortus coeruleus C. G. Gulling 1905-1 1535 Lassen Big Meadows. Comment
  CHSC4921  Calochortus leichtlinii L. G. Bennett 1967-6-24 24 Lassen 0.5 miles from start of road 5.19 towards Murrers Meadow, near Eagle Lake. 1493 Comment
  SBBG15290  Calochortus leichtlinii H. and M. Dearing 1938-7-1 2237 Lassen top of pass W of Susanville 1762 Comment
  UC1523812  Calochortus leichtlinii Gary Schoolcraft 1983-7-19 1096 Lassen s slope Fredonyer Peak 2255 Comment
  UC423015  Calochortus leichtlinii Franklin P. Nutting Lassen Pine Creek Comment
  CAS-BOT-BC487965  Calochortus leichtlinii Louella Bass 1973-6-3 93 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC487968  Calochortus leichtlinii Marcus E. A M Jones 1897-7-8 s.n. Lassen Lassen's Peak 1828 Comment
  JEPS124668 Image available Calochortus leichtlinii Laurel Loeblich 1964-6-30 59 Lassen Highway 139 8.7 miles north of Susanville. Comment
  SD52068  Calochortus nuttallii F. Stephens 1894-7-2 10337 Lassen Robbins Creek. Comment
  HSC63826  Calyptridium monospermum Teresa Prendusi 1980-7-1 Lassen Champs Flat, 7 mi. W of northern tip of Eagle Lake 1677 Comment
  CHSC30571  Calyptridium umbellatum Sori H Shad 1970-6-25 32 Lassen Found E. 2 mile past Murrer's Meadow on N. side of road in rocky soil. 1524 Comment
  CHSC36436  Calyptridium umbellatum Dave Lueck 1981-6-13 18 Lassen Dirt road at base of N. E. side of Galletin Peak. 1584 Comment
  CDA39903  Calystegia occidentalis subsp. occidentalis T. C. Fuller 1965-6-3 13606 Lassen Chemically treated railroad right of way, Susanville. 0 Comment
  RSA0017409  Calystegia occidentalis subsp. occidentalis Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC1134560  Camassia quamash subsp. breviflora A. Simontacchi 1940-5-17 736 Lassen 5.9 mi s of Patterson Mountain (Lassen National Forest); Lassen National Forest 1706 Comment
  CAS-BOT-BC497554  Camassia quamash subsp. breviflora Doris Kildale Gillespie 1930-5-13 9390 Lassen Between Susanville and Janesville Comment
  HSC15435  Camassia quamash subsp. breviflora Jim Vaughn 1956-7-13 Lassen Drakesbad, Mt. Lassen Natl. Park 1738 Comment
  SFV17867  Camassia quamash subsp. quamash J. D. Dilley 1998-7-14 367 Lassen Sierra Nevada Along CA-44, 1 mile west of Bogard Work Center; 29 miles northwest of Susanville. 1707 Comment
  SEINET8197883  Camassia quamash var. breviflora J. A. Young 1982-6-9 s.n. Lassen Meyer's Ranch, Adin. 1372 Comment
  SEINET10480825  Camelina microcarpa David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17759 Lassen Approx 12 mi s of adin on state hwy 139, in basalt and clay; along edge of rd on rolling knoll, in artemisia-juniper assoc. 1372 Comment
  HSC69078  Camissonia boothii subsp. alyssoides Gary Schoolcraft 1980-5-16 234 Lassen N of Kiln on Wendel Hwy. 1280 Comment
  NY851232  Camissonia claviformis var. cruciformis A. A. Heller 1938-6-23 15211 Lassen U.S. Highway #395, about midway between Mapes and Secret Valley 1372 Comment
  HSC24653  Camissonia contorta John Pratt 1970-6-14 18 Lassen Comment
  RSA17675  Camissonia parvula Elmer I. Applegate 1934-5-4 8930 Lassen Secret Valley Comment
  NY852074  Camissonia tanacetifolia Mrs. C. C. Bruce 06 1898 2203 Lassen Susanville Comment
  RSA74348  Camissonia tanacetifolia Milo S. Baker 1952-5-23 12420 Lassen Wet Spot, E of Chester, Hwy 36. Comment
  HSC63834  Camissonia tanacetifolia Teresa Prendusi 1980-5-16 Lassen 6 mi. S of Ravendale and 1 mi. W of Hwy. 395 Comment
  RSA125385  Camissonia tanacetifolia Arthur R. Kruckeberg 1954-6-22 3322 Lassen 6 miles south of Likely along Highway 395 Comment
  CAS-BOT-BC160863  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell 1934-7-8 12505 Lassen Spalding's, Eagle Lake Comment
  RSA18258  Camissonia tanacetifolia subsp. tanacetifolia Carl B. Wolf 1929-9-1 3784 Lassen Mt. Lassen Nat l Park, between Grassy Lake and Snag Lake. Comment
  RSA512846  Camissonia tanacetifolia subsp. tanacetifolia J. T. Howell, Gordon H. True 1973-8-1 50209 Lassen Sierra Nevada: Headwaters of Baxter Creek, east slope of Diamond Range, south of Susanville. 2165 Comment
  CAS-BOT-BC160861  Camissonia tanacetifolia subsp. tanacetifolia Raymond Nelson 1962-8-25 s.n. Lassen Lassen Volcanic National Park. On the east shore of Snag Lake Comment
  UC773929  Capsella bursa-pastoris L. R. Short and J. Warren 1936-6-9 S 408 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1844 Comment
  RSA592547  Cardamine breweri var. breweri S. O. Mattoon 1978-7-10 24 Lassen Lassen County, Blue Lake Camp Ground: 17 miles E of Likely, Southern Warner Mtns, Modoc N Fork. 1890 Comment
  UC1494954  Cardamine nuttallii Reed C. Rollins and Kathryn W. Rollins 1981-5-30 81166 Lassen Gold Run Road toward Sky Line Drive 10 mi s Susanville; s of Susanville Comment
  RSA149125  Cardaria pubescens I. L. Wiggins, Dorothy Wiggins 1961-6-16 16529 Lassen 4.1 miles E of Bieber. Comment
  JEPS63614  Carex angustata Leland S. Smith 1922-7-30 68 Lassen Martin Spring Meadow Lassen National Forest Comment
  CHSC89754  Carex athrostachya L. P. Janeway 2004-6-26 8158 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  UC50815  Carex athrostachya J. Burtt Davy Jun 17-24 1897 3298 Lassen Honey Lake Valley, slough near Dr. Witt's Comment
  CDA33034  Carex barbarae T. C. Fuller 1963-7-15 10892 Lassen South of road to Pittsville, 5.4 miles northwest of Little Valley. 0 Comment
  UC2015834  Carex breweri Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4443 Lassen Lassen Volcanic National Park. Lassen Peak, near parking area. Comment
  UC1537637  Carex douglasii Gordon H. True Jr. 1939-6-15 996 Lassen w Grasshopper Lake; Bullard Lake Comment
  CAS-BOT-BC19780  Carex douglasii H. D. Ripley; R. C. Barneby 1943-6-14 5145 Lassen Hidden Valley, E of Susanville. 1584 Comment
  UC1609197  Carex filifolia var. erostrata Vernon H. Oswald and Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy. 44 (between Poison Lake and Susanville) 1725 Comment
  CAS-BOT-BC20164  Carex filifolia var. erostrata Lassen 1927 G. S. Crew 1927-7-15 60 Lassen Lassen Forest. 1691 Comment
  SEINET7558599 Image available Carex filifolia var. erostrata John Thomas Howell 1934-7-6 12451 Lassen Harvey Valley. Comment
  JEPS28382  Carex heteroneura George W. Gillett 1957-7-28 937 Lassen along s margin, Widow Lake Lassen Volcanic National Park, Widow Lake 2072 Comment
  SEINET7561726 Image available Carex hoodii L. P. Janeway 2003-7-24 7917 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14. 1.1 km from Road 30N21, small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  SEINET7561698 Image available Carex hoodii George W. Gillet 1957-7-29 946 Lassen Lassen Volcanic National Park, along trail between Snag Lake and Butte Lake. 1859 Comment
  CHSC115041  Carex inops subsp. inops Stephanie Puentes 2011-7-7 09419 Lassen Big Foot THP. In the Big Valley Mountains, west of Big Valley. About 5 air miles SW of Lookout and 6 air miles NW of Bieber. 1447 Comment
  JEPS120111  Carex integra Lowell Ahart, John Dittes 2012-7-9 18299 Lassen About 150 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  HSC95182  Carex interior Gordon Leppig 1998-8-17 1055 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1594638  Carex lenticularis var. impressa Vernon H. Oswald and Lowell Ahart 1992-7-16 5115 Lassen swamp on creek w Cinder Pit (on logging road paralleling the e side of creek, 1.3 mi n of Hwy 44 and McCoy Flat Reservoir, between Old Station and Susanville); Bridge Creek 1719 Comment
  HSC103598  Carex leporinella Thomas W. Nelson, Jane Nelson 1985-8-10 8012 Lassen Along north side of Silver Lake campground 1829 Comment
  CDA33106  Carex limosa Gordon Leppig, J. Cromwell 1997-7-27 610 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  UC1609199  Carex livida Vernon H. Oswald and Lowell Ahart 1993-8-3 5742 Lassen e Silver Lake (just e of the Caribou Wilderness, ca 13 mi (air) n of Lake Almanor); Cooper Swamp 1932 Comment
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May 19 2014
  UC2015854  Carex microptera Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4447 Lassen Lassen Volcanic National Park. Lassen Peak, above parking area. Comment
  CHSC87113  Carex multicaulis L. P. Janeway 2001-6-20 7207 Lassen High Cascade Range. 0.6 km east of Road 111 and 1.3 km south of Road 35N60; about 11 km west of Little Valley, 3.9 km east-northeast of Coble Mountain. 1402 Comment
  SEINET7568737 Image available Carex nebrascensis L. P. Janeway 2003-7-24 7913 Lassen Pegleg Mountain 7.5' quad. High Cascade Range, at lower end of a meadow and marsh along Bridge Creek, 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  UC1133502  Carex nebrascensis Robert W. Gardner 1939-6-6 G- 29 Lassen Little Harvey Valley Halls Flat Quadrangle Comment
  UC1142949  Carex nebrascensis A. L. Hormay 1941-6-18 7 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  CHSC66413  Carex pellita Vernon H. Oswald; Lowell Ahart 1996-6-17 7809 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. 1420 Comment
  CHSC75552  Carex pellita Vernon H. Oswald; Lowell Ahart 1999-6-9 9738 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.3 mi west of Hwy. 395. 1353 Comment
  SEINET10817202  Carex phaeocephala Willard W. Eggleston 1927-7-11 Eggleston 21474 Lassen Bogard Ranger Station, Lassen Forest. 1500 Comment
  CHSC108016  Carex praegracilis Lowell Ahart; John Dittes 2011-6-20 17477 Lassen About 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CDA33131  Carex praegracilis T. C. Fuller 1980-8-6 20319 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  CHSC54424  Carex raynoldsii Vernon H. Oswald 1991-6-25 4695 Lassen Lassen Volcanic National Park. Butte Lake-Snag Lake Trail, just south of its junction with Butte Lake-Widow Lake Trail, in the northeast corner of the park. 1842 Comment
  CHSC53538  Carex rossii L. P. Janeway; Gary Benson, Randy Harrison 1984-8-23 1057 B Lassen On southwest side of Blue Lake. 1889 Comment
  HSC48183  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19243 Lassen 2 mi. N of Westwood Comment
  HSC48221  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19176 Lassen Harvey Valley near Cone Springs Comment
  HSC48339  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19176 Lassen Harvey Valley near Cone Springs Comment
  CAS-BOT-BC117700  Carex simulata Alice Eastwood; John Thomas Howell 1940-6-15 8305 Lassen Willow Creek near Hayden Hill. Comment
  UC1142962  Carex straminiformis A. L. Hormay 1941-6-19 25 Lassen Squaw Valley Lassen National Forest 1737 Comment
  JEPS28384  Carex subfusca George W. Gillett 1957-7-26 911 Lassen lake shore near ne arm of Butte Lake; Lassen Volcanic National Park, Butte Lake 1844 Comment
  CAS-BOT-BC116608  Carex subfusca Hans Leschke 1959-8-10 1641 Lassen Above Emerald Lake 2438 Comment
  CAS-BOT-BC116614  Carex subfusca Hans Leschke 1954-7-3 s.n. Lassen Border of swamp north of Willow Lake. 1661 Comment
  CAS-BOT-BC116616  Carex subfusca B. Clear 1938-7-13 s.n. Lassen Dersch Meadows, Lassen Park. 2016 Comment
  JEPS28336  Carex utriculata George W. Gillett 1957-7-22 885 Lassen near campsite at s end of lake; Lassen Volcanic National Park, Snag Lake 1850 Comment
  CAS-BOT-BC115281  Carex utriculata L. S. Smith 1918-8-11 1020 Lassen Lost Lake. Comment
  CAS-BOT-BC115283  Carex utriculata Ray Hanson 1954-8-23 s.n. Lassen Lassen Park, near Jackey Lake. Comment
  HSC103651  Carex utriculata Thomas W. Nelson, Jane Nelson 1985-8-10 8009 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC114884  Carex whitneyi Hans Leschke 1958-8-15 s.n. Lassen Trail Butte-to Snag Lake near Lava beds. 1920 Comment
  CAS-BOT-BC248971  Castilleja Margaret M. Hanna 1956-6-3 943 Lassen 2 mi. West of Nubieber Comment
  CHSC106570  Castilleja angustifolia K. Schierenbeck 2008-5-3 Lassen Fort Sage Mtns. 1439 Comment
  HSC20562  Castilleja angustifolia M. L. Stuart 1965-5-2 56 Lassen 2 mi. N of Termo. on Hwy. 395 1829 Comment
  CAS-BOT-BC249611  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50645 Lassen South and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC249613  Castilleja applegatei subsp. pinetorum G. Schoolcraft 1987-5-6 1699 Lassen North end of Eagle Lake near Stone Ranch 1554 Comment
  CHSC106084  Castilleja applegatei subsp. pinetorum Lowell Ahart; John Dittes 2010-7-31 17009 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC30598  Castilleja applegatei subsp. pinetorum Marc Held 1972-6-29 19 Lassen 3 miles from Dean's Meadow, towards 5 points, off road side. Comment
  CHSC36484  Castilleja applegatei subsp. pinetorum Margaret E. Halloran 1982-6-3 5 Lassen 3 1/2 mi s of jct of forest service roads 5.16 and 5.17. Comment
  CHSC60412  Castilleja applegatei subsp. pinetorum Mary Ann Showers 1992-6-13 2538 Lassen Lassen Volcanic National Park. Meadow along trail from Snag Lake jct to Widow Lake. 1828 Comment
  CHSC7750  Castilleja applegatei subsp. pinetorum Beverley J. Wise 1969-5-4 105 Lassen 4 mi. north of Susanville on Hwy 139 (Antelope Grade). 1371 Comment
  RSA747544  Castilleja applegatei subsp. pinetorum K. M. Meyer, A. Townesmith 2007-7-23 152 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  UC1924581  Castilleja applegatei subsp. pinetorum Debra Valov 2006-5-28 2006010 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1291 Comment
  CAS-BOT-BC243710  Castilleja applegatei var. pinetorum Clarence R. Quick 1961-6-21 61 -31 Lassen Adjacent to Road 21, Blacks Mountain Experimental Forest northeast of Lassen Peak 1798 Comment
  UC1563850  Castilleja arachnoidea Barbara Ertter 1988-7-25 7861 Lassen ca 1.5 mi e Diamond Peak (ca 10 air mi due s of Susanville, ridge of Diamond Mts); Diamond Mts. 2286 Comment
  JEPS3595  Castilleja campestris subsp. campestris Helen-Mar Wheeler 1952-7-11 Lassen s of Madeline Comment
  UC604559  Castilleja campestris subsp. campestris C. W. Sharsmith 1938-7-18 3631 Lassen 2 mi s Madeline; Madeline Plains Comment
  SEINET3159144  Castilleja chromosa J. L. Strother 1970-5-23 954 Lassen about 6 mi N of Honey Lake 1280 Comment
  JEPS81867  Castilleja lacera L. R. Heckard with J. C. Hickman 1982-5-11 5841 Lassen about 2.5 mi w Paynes Creek (along Highway 36 to Mt Lassen (6.5 mi ne of Dales)) 518 Comment
  HSC63893  Castilleja linariifolia Teresa Prendusi 1980-7-1 Lassen McCoy Flat, 5 mi. E of northern tip of Eagle Lake 1646 Comment
  CAS-BOT-BC244886  Castilleja miniata Louella Bass 1973-6-17 116 Lassen Elysian Valley. Plants of the Sierra Nevada 1325 Comment
  JEPS9846  Castilleja miniata W. L. Jepson 1918-8-2 7793 Lassen Honey Lake Valley 1219 Comment
  CAS-BOT-BC240999  Castilleja pilosa Alice Eastwood 1940-6-15 8318 Lassen Said Valley Comment
  HSC26597  Castilleja pilosa D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19190 Lassen Harvey Valley near Cone Springs Comment
  HSC82214  Castilleja pilosa Thomas W. Nelson, Jane P. Nelson 1980-7-6 5995 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  SBBG7071  Castilleja pilosa H. and M. Dearing 1939-6-6 3566 Lassen Pitt River, near Bieber Comment
  UC1483790  Castilleja pilosa Mary Meyer 1980-7-1 Lassen Champs Flat 1677 Comment
  CHSC99526  Castilleja tenuis Lowell Ahart; John Dittes 2008-6-20 14944 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS107313  Castilleja tenuis Lowell Ahart, John Dittes 2005-6-1 11902 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  RSA0059451  Castilleja tenuis Lowell Ahart, John Dittes 2011-6-20 17499 Lassen About 15 yards west of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1483853  Castilleja tenuis G. Schoolcraft 1980-7-16 316 Lassen near Nelson Corral Reservoir 1804 Comment
  JEPS103212  Castilleja tenuis G. Schoolcraft 1993-6-29 2314 Lassen Ash Valley RNA 16 miles east of Adin, CA 1554 Comment
  RSA339727  Ceanothus cordulatus F. R. Fosberg 1969-8-16 51426 Lassen (California Registered Historical Landmark 678) 10 mi. west of Susanville. Comment
  CHSC4984  Ceanothus prostratus R. Clicquennoi 1967-7-4 5 Lassen 5 mi s of Eagle Lake Biology Station on Gallatin Beach Rd. Comment
  JEPS118451  Ceanothus prostratus Lowell Ahart, John Dittes 2011-6-20 17496 Lassen Forest floor, about 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  RSA38478  Ceanothus prostratus P. A. Munz 1947-5-18 11864 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville. 1509 Comment
  UC727092  Ceanothus prostratus A. A. Heller 1941-6-26 16230 Lassen on roadside banks on the ridge w Nieubieber; w of Nieubierber Comment
  CHSC5047  Ceanothus velutinus L. B. Barlow 1967-7-1 64 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road. 1554 Comment
  CHSC6287  Ceanothus velutinus R. Clicquennoi 1967-7-1 37 Lassen Four miles s of Eagle Lake Biology Station off Gallatin Beach Road. 1554 Comment
  HSC22955  Ceanothus velutinus John Pratt 1970-6-21 28 Lassen 1738 Comment
  UC1071531  Ceanothus velutinus A. Simontacchi 1940-6-4 797 Lassen 7.1 mi sw Jacks Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD130022  Centaurea diffusa T. C. Fuller 1962-8-28 9481 Lassen east side of Highway 395 to Madelaine, 1.9 mile north of Termo. Comment
  JEPS121264  Centaurea virgata subsp. squarrosa Lowell Ahart, John Dittes 2013-7-23 18910 Lassen Near the summit on the N side of Hwy 299, at entrance road to quarry site, Big Valley Mountain, just E of Big Valley Summit, 2.8 air miles SW of Nubieber. Comment
  RSA516348  Centaurium exaltatum Barbara Ertter 1987-7-24 7305 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  CHSC99741  Cerastium glomeratum Lowell Ahart; John Dittes 2008-6-20 14966 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  HSC23531  Ceratophyllum demersum R. Carter 1967-7-13 593 Lassen 5 mi. E of Eagle Lake Biology Station at point where road comes nearest to Willow Creek 1561 Comment
  UC8815  Ceratophyllum demersum J. Burtt Davy Jun 17 1897-Jun 24 1897 3324 Lassen Honey Lake Valley; near DeWitt's 1219 Comment
  SEINET10483778  Cercocarpus ledifolius Mary Susan Taylor 1974-5-4 Taylor 226 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  UC452575  Cercocarpus ledifolius var. ledifolius Mrs. R. M. Austin 1879-1 Lassen Comment
  JEPS96027  Chaenactis douglasii Vernon H. Oswald and Lowell Ahart 1996-6-17 7775 Lassen ca. 7 mi w Susanville (at bridge spanning river on n side of Hwy 36, and along the Bizz Johnson Trail, accessed at Devils Corral Trailhead off hwy); Modoc Plateau, Susan River 1432 Comment
  CDA19743  Chaenactis douglasii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Between Ravendale and Secret Valley. 0 Comment
  CAS-BOT-BC276614  Chaenactis douglasii var. douglasii Louella Bass 1978-7-11 78 -10 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC276616  Chaenactis douglasii var. douglasii John Thomas Howell 1955-7-19 30813 Lassen E side of Beckwourth Pass 1493 Comment
  CHSC105256  Chaenactis douglasii var. douglasii Lowell Ahart; John Dittes 2010-7-31 16984 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC4432  Chaenactis douglasii var. douglasii K. R. Stern 1967-7-1 2457 Lassen Ca. 14 mi. NE of Susanville. State Hwy. 139. Comment
  SEINET7450297 Image available Chaenactis stevioides F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  CAS-BOT-BC141744  Chamaebatiaria millefolium John Thomas Howell 1934-7-9 12519 Lassen Pine Creek Flat Comment
  CHSC19727  Chamaebatiaria millefolium Mary E. Meyer 1973-7-7 14 Lassen Located west of ELBS water tower. Comment
  CHSC4857  Chamaebatiaria millefolium R. Carter 1967-7-13 588 Lassen On the rd to Eagle Lake, Biology Station and Willow Creek. 1584 Comment
  CHSC4937  Chamaebatiaria millefolium W. Lessig 1967-7-15 30 Lassen 1/8 mi se of Eagle Lake Biology Station. 1554 Comment
  CHSC117544  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Dittes 2016-7-13 21130 A Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC66385  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1996-6-17 7771 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the trail on the N side of Hwy. 36 ca. 0.2 mi E of the 7 mile post. 1432 Comment
  UC62593  Cheilanthes intertexta Baker and Nutting 1894-7-3 Lassen Dixey Mts Comment
  SD211585  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen Circa 3/4 mile East-Northeast of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  UC1587041  Chenopodium fremontii G. Schoolcraft 1991-7-31 2206 Lassen just s of Shinn Peak 2103 Comment
  CAS-BOT-BC451355  Chimaphila menziesii Clare B. Hardham 1971-8-22 18388 Lassen Diamond Mountain: North slopes 2133 Comment
  CAS-BOT-BC39672  Chorispora tenella Gary Schoolcraft 1982-3-24 624 Lassen Lower end of Amedee Canyon. 1280 Comment
  SBBG18321  Chorizanthe watsonii C. B. Hardham 1961-6-17 7499 Lassen Baxter Crk, S of Susanville 1524 Comment
  UC1137593  Chrysothamnus humilis L. R. Short and J. Warren 1936-8-17 S- 495 Lassen Burgess Spr. Exp. Range Lassen Forest 1760 Comment
  RSA3395  Chrysothamnus nauseosus subsp. consimilis C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile east of Termo 1646 Comment
  SEINET4671623 Image available Chrysothamnus nauseosus subsp. consimilis Carl B. Wolf 1932-7-18 Lassen Big Valley, 2 6/10 miles from Bieber on road to; Alturas. 1268 Comment
  JEPS21409  Chrysothamnus viscidiflorus subsp. viscidiflorus W. L. Jepson 1918-8-4 7813 Lassen e of Eagle Lake; Horse Lake 1554 Comment
  OBI5967  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 2396 Lassen Big Valley, 2.6 mi from Bieber on the road to Alturas 1268 Comment
  SEINET5727104 Image available Chrysothamnus viscidiflorus subsp. viscidiflorus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7713 Lassen Collected along Forest Road 37N11, off CA Hwy 139.; Modoc National Forest 1555 Comment
  CAS-BOT-BC162753  Chylismia claviformis subsp. cruciformis G. H. True 1937-7-10 791 Lassen Skeedaddle Comment
  CHSC64794  Chylismia claviformis subsp. cruciformis Vernon H. Oswald 1995-5-24 6759 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. At the base of the Amedee Mtns. 1280 Comment
  SEINET10725178  Cichorium intybus Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 133 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  CDA38206  Cicuta douglasii T. C. Fuller 1965-8-26 14041 Lassen North side of old highway to Johnstonville, 5 miles east of Susanville. 0 Comment
  CDA1166  Cirsium cymosum T. C. Fuller 1959-7-7 2762 Lassen Hwy 395; 1.7 mi. south of Ravendale. 0 Comment
  JEPS30610  Cirsium cymosum var. cymosum Peter H. Raven with Otto T. Solbrig 1958-6-17 13279 Lassen 13.1 mi s Ravendale (along U.S. Highway 395) Comment
  JEPS30797  Cirsium cymosum var. cymosum Peter H. Raven and Otto T. Solbrig 1958-6-17 13303 Lassen along US Hwy 395 8.0 mi n Madeline Comment
  JEPS30608  Cirsium douglasii var. breweri Peter H. Raven and Otto T. Solbrig 1958-6-17 13280 Lassen 13.1 mi s Ravendale (along U.S. Highway 395) Comment
  CHSC116356  Cirsium inamoenum J. R. Keck Jr.; D. L. Haws 1980-7-22 PDR 330194 Lassen Ravendale, BLM rangeland. 1625 Comment
  CAS-BOT-BC280057  Cirsium neomexicanum T. C. Fuller 1980-8-5 20312 Lassen 0.4 km. east of the campground, east shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  CDA1527  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14982 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CDA1528  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14983 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CAS-BOT-BC280422  Cirsium ochrocentrum Lee Wheeler 1950-10-1 s.n. Lassen Clarence Hoffman Ranch Comment
  CAS-BOT-BC280429  Cirsium ochrocentrum T. C. Fuller 1965-10-13 14199 Lassen E. of rd. at the e. base of Dry Valley Ridge, Madelaine [Madeline] Plains, 3 mi. n. of paved road, 10 mi. w. of Termo Comment
  CDA37705  Cirsium ochrocentrum Robin Breckenridge 2006-8-15 s.n. Lassen Madeline Plains, Westside Road, old Basque homestead. 0 Comment
  CDA37712  Cirsium ochrocentrum Breckenridge/Filippini 2007-6-13 s.n. Lassen Madeline Plains, western edge, along Westside Road, old Basque homestead. 0 Comment
  CAS-BOT-BC286307  Cirsium scariosum John Thomas Howell 1976-7-20 52025 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC286309  Cirsium scariosum Louella Bass 1973-6-17 117 Lassen Elysian Valley 1325 Comment
  JEPS109645  Cirsium scariosum Dean W. Taylor 2002-6-21 18176 Lassen Windmill Flat (lying ca. 1.5 mi NW of Snider Lake), north end of the flat near the base of the windmill 1706 Comment
  CDA1562  Cirsium scariosum var. americanum D. Chambers, M. Carstens 1979-8-22 s.n. Lassen Modoc National Forest, private inholding, south side of Juniper Creek. 0 Comment
  CDA20242  Cirsium undulatum G. D. Barbe 1984-8-2 4186 Lassen Madeline Plains; Just e of Westside Rd, 3 mi no f Termo-Grasshopper Rd., Madeline Plains, along e base of Dry Valley Ridge. 1615 Comment
  CHSC7631  Cirsium vulgare Beverley J. Wise 1968-8-23 16 Lassen 10 mi. N.W. of Susanville on the Las. Co. Rd. 201. 1798 Comment
  CAS-BOT-BC163164  Clarkia lassenensis A. M. Vollmer; L. Beane 1953-7-1 98 Lassen Along Halls Flat road, beginning 6 mi. W of Susanville to McArthur 1554 Comment
  JEPS108559  Clarkia lassenensis L. P. Janeway 2005-7-3 8452 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout 1536 Comment
  CAS-BOT-BC163166  Clarkia lassenensis G. Schoolcraft 1993-6-29 2308 Lassen Ash Valley RNA between Adin & Madeline 1554 Comment
  POM260406  Clarkia lassenensis C. L. Hitchcock 1940-5-26 6610 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CHSC66394  Clarkia rhomboidea Vernon H. Oswald; Lowell Ahart 1996-6-17 7780 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of Hwy. 36 between the trail and highway bridges spanning the Susan River. 1432 Comment
  UC1122437  Clarkia rhomboidea A. Simontacchi 1940-6-23 885 Lassen 3.2 mi sw Schoonamaker Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC59559  Clarkia stellata Mary Meyer 1980-7-1 Lassen Along road traversing southern end of McCoy Flat. 1645 Comment
  CAS-BOT-BC440042  Claytonia perfoliata subsp. perfoliata Louella Bass 1973-4-23 25 Lassen Elysian Valley. 1325 Comment
  CHSC108022  Claytonia rubra subsp. rubra Lowell Ahart; John Dittes 2011-6-20 17486 Lassen About 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  JEPS118455  Claytonia rubra subsp. rubra Lowell Ahart, John Dittes 2011-6-20 17486 Lassen About 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  NY242101  Cleomella hillmanii G. Schoolcraft 1989-5-31 1883 Lassen 3 mi. N. Wendel Rd. along Skedaddle Ranch Rd. 1463.0 Comment
  UC1587089  Cleomella parviflora G. Schoolcraft 1991-7-22 2178 Lassen s of Smoke Creek Road (just w of CA/NV line) 1341 Comment
  NY242362  Cleomella plocasperma G. Schoolcraft 1986-6-11 1620 Lassen About 1 mile west of CA-NV stateline along Smoke Creek Road. 1341.1 Comment
  UC1533121  Cleomella plocasperma G. Schoolcraft 1986-6-11 1620 Lassen about 1 mi w CA-NV stateline (along Smoke Creek Road) 1341 Comment
  CHSC7757  Collinsia parviflora Beverley J. Wise 1969-4-26 102 Lassen 2 mi. north of Susanville on Hwy 139. 1341 Comment
  RSA0035917  Collinsia parviflora Lowell A. Ahart, John Dittes 2008-6-20 14916 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1032573  Collinsia parviflora A. Simontacchi 1940-5-10 691 Lassen 7.3 mi w of Harvey Mountain Lookout (Lassen National Forest); Lassen National Forest 1752 Comment
  UC1137686  Collinsia parviflora L. R. Short 1936-5-7 S 344 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1737 Comment
  RSA0117240  Collinsia parviflora L. R. Short 1936-5-7 S- 344 Lassen MDM, Burgess Spring Experiment Range. 1738 Comment
  CHSC5903  Collinsia torreyi M. West 1946-6-24 Lassen Dow Butte Road. Eagle Lake. 1828 Comment
  HSC75886  Collinsia torreyi D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19258 Lassen Harvey Valley near Cone Springs Comment
  OBI77560  Collomia grandiflora Anthony Baniaga 2011-7-5 419 Lassen Lassen Natl Forest. E of Willard Ck. Fredonyer Pass quad T29N R10e sec 25 NE of NW Comment
  SEINET12326975  Collomia grandiflora Unknown 1978-1 57 Lassen Lower Dry Lakes, E of Eagle L 1646 Comment
  UC1981729  Collomia linearis Debra Valov 2010-7-17 2010102 Lassen Bieber, Lassen Co., CA;; off County Rs A2 c. 8.7 km east of Hwy 299. Comment
  CHSC6200  Collomia tinctoria 1946-6-13 Lassen Eagle Lake. 1584 Comment
  UC1601297  Collomia tinctoria Franklin P. Nutting Lassen Pine Creek Comment
  UC1567424  Comandra umbellata subsp. californica G. Schoolcraft 1989-6-7 1908 Lassen Shaffer Mountain near top Shaffer Mountain 2011 Comment
  CHSC66260  Comarum palustre Vernon H. Oswald; Lowell Ahart 1996-6-24 7891 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. At the springs on the E side of the meadow. 1633 Comment
  HSC95148  Comarum palustre Gordon Leppig 1998-7-12 934 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1483855  Corallorhiza striata G. Schoolcraft 1980-7-15 309 Lassen w Bieber; Big Valley Mountain Timber Sale area 1798 Comment
  UC761815  Cordylanthus ramosus R. F. Hoover 1940-10-1 4655 Lassen Jonesville Comment
  CAS-BOT-BC401848  Corydalis caseana subsp. caseana John Thomas Howell; Gordon H. True 1973-8-1 50237 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CHSC93564  Crepis acuminata Lowell Ahart; John Dittes 2005-6-2 11933 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  UC581280  Crepis acuminata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2344 Lassen 1 mi sw Grasshopper Valley 1645 Comment
  CAS-BOT-BC290392  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2294 Lassen South slope Thompson Peak, south of Janesville 2133 Comment
  CHSC118479  Crepis acuminata Don Lepley 2016-6-21 Lassen Lassen National Forest. Hat Creek Ranger District. Flat west of Blacks Mt., 0.2 mile west of junction of Roads 34N07 and 34N05Y. UTM 648055.1 E x 4515134.8N. 1726 Comment
  SEINET10474584  Crepis bakeri subsp. cusickii Mary Susan Taylor 1982-5-29 Taylor 4562 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  UC581207  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2340 Lassen s-facing slope 3 mi e Champs 1780 Comment
  UC581208  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2216 Lassen just w ridge crest between Willow Creek Valley and Horse Lake 524 Comment
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Jul 18 2007
  UC581246  Crepis modocensis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2298 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  POM17694  Crepis modocensis subsp. subacaulis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC581270  Crepis modocensis subsp. subacaulis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2276 Lassen Diamond Mt.; summit and e slope Comment
  UC581194  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2303 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  UC581242  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2259 Lassen bare summit ridge and ridges sw Diamond Mt. (s of Susanville) Comment
  UC581277  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2319 Lassen about a mi below summit; Black Mountain 1940 Comment
  CAS-BOT-BC376460  Crepis occidentalis subsp. pumila James Jokerst 1983-7-23 1868 Lassen Near Madeline Plains 1614 Comment
  POM70805  Cressa truxillensis Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  CHSC60650  Crocidium multicaule Vernon H. Oswald; Lowell Ahart 1993-4-17 5275 Lassen Near Wayman Barn at the W end of Hunt Rd., Ash Creek Wildlife Area, ca. 5 mi NE of Bieber. 1264 Comment
  UCD54541  Crypsis schoenoides Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2725 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1246 Comment
  RSA233758  Crypsis vaginiflora R. F. Thorne, C. W. Tilforth 1969-9-6 39255 Lassen along Long Valley Creek, c. 14 mi. SE of Milford. 1311 Comment
  CAS-BOT-BC189240  Cryptantha John Thomas Howell 1977-6-22 52403 Lassen N end of Eagle Lake 1584 Comment
  CHSC29917  Cryptantha affinis Robin L. Ondricek 1978-7-22 108 Lassen 1977 Burn area, 1.8 mi e of Coleman Rd. on Lassen Co. Road A1. 1950 Comment
  CHSC64840  Cryptantha ambigua Vernon H. Oswald 1995-6-26 6918 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  SDSU20523  Cryptantha ambigua Nuri Benet-Pierce, John P. Pierce 2012-7-14 523 Lassen Between Poison Lake and Patterson Flats, in clearing by the rd, at the start to 35N08. 1724 Comment
  SEINET10972821  Cryptantha ambigua Jeffrey Huber 1971-6-2 Huber 126 Lassen Approx. 30 mi N of Susanville, on CA Hwy 139, in basalt; Pinus-Artemesia-Juniper Assoc. 1646 Comment
  UCD119054  Cryptantha ambigua Robbins; Raynor 1943-6-1 s.n. Lassen Madeline. Comment
  CHSC7765  Cryptantha circumscissa Beverly J. Wise 1969-5-18 77 Lassen 17.2 mi. East of Susanville on Las. Co. Rd 216 off Las. Co. Rd. 215. 1524 Comment
  CHSC91313  Cryptantha circumscissa Lowell Ahart; John Dittes 2005-6-1 11890 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1433 Comment
  UCD54568  Cryptantha circumscissa Ellen Dean; Dawn Cunningham 2005-10-25 2751 Lassen East of the town of Susanville. Property N of California Correctional Facility. 1248 Comment
  POM73157  Cryptantha crassisepala var. elachantha Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.?] 1220 Comment
  SDSU20525  Cryptantha echinella Nuri Benet-Pierce, John P. Pierce 2012-7-14 526 Lassen Diamond Mountain. 2023 Comment
  NY1111960  Cryptantha gracilis G. Schoolcraft 1984-6-4 1193 Lassen Wendel Canyon 1524 Comment
  JEPS95974  Cryptantha humilis Vernon H. Oswald and L. Ahart 1999-6-9 9743 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  SEINET8545983  Cryptantha intermedia var. grandiflora J. A. Young 1982-6-7 s.n. Lassen Redlands. 1676 Comment
  SDSU20202  Cryptantha schoolcraftii Ronald B. Kelley 2005-5-26 886 Lassen South end of Coppersmith Hills, on top edge of north-to-south running canyon of west facing steep slopes, 0.75 miles north of Tuledad Valley Road (CR506), T37N R17E sec.35 NE1/4 of NW1/4. Also found at 41 deg. 02.022'N, 120 deg. 0.529'W (WGS64), 5540' elev. 1715 Comment
  CHSC92722  Cryptantha torreyana L. P. Janeway 2005-7-3 8449 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  HSC68930  Cryptantha watsonii Gary Schoolcraft 1980-5-7 219 Lassen On Honey Lake Island 1220 Comment
  JEPS47106  Cuscuta californica Brown and Wieslander 1922-8-20 85 Lassen Martin Springs Eagle Lake Comment
  CDA39916  Cuscuta californica var. breviflora T. C. Fuller 1963-7-16 10922 Lassen Hwy 395 to Ravendale, 10 miles north of Litchfield. 0 Comment
  JEPS124897 Image available Cuscuta pentagona Peter Schultz 1967-7-11 67 Lassen 2 miles north of Doyle. Comment
  UC22937  Cycladenia humilis var. humilis Milo S. Baker 1894-7-30 Lassen Silver Lake Comment
  CHSC43469  Cynoglossum occidentale Lowell Ahart; John Thomas Howell 1974-7-9 515 Lassen Along the edge of Eagle Lake Road, about 5 miles north-west of Susanville. 1584 Comment
  UC1587038  Cynoglossum occidentale G. Schoolcraft 1991-7-30 2192 Lassen Bear <Sring> on n. side of widow Mt. 1780 Comment
  JEPS127269  Cyperus squarrosus Lowell Ahart, John Dittes 2016-7-13 21139 Lassen 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  UC569547  Cyperus squarrosus H. S. Yates 1936-8-11 6065 Lassen Baxter Creek Susanville Quad., Baxter Creek 1280 Comment
  CAS-BOT-BC208395  Dalea ornata Gary Schoolcraft 1984-6-28 1280 Lassen NW of Shaffer Mtn., on the tablelands 1402 Comment
  CAS-BOT-BC445517  Damasonium californicum Arnold Tiehm; Gary Schoolcraft 1984-8-14 9245 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line 1698 Comment
  JEPS32207  Damasonium californicum J. B. Davy Jun 17 1897-Jun 24 1897 3335 Lassen Honey Lake Valley, Susan R. 1219 Comment
  CAS-BOT-BC445519  Damasonium californicum C. L. Hitchcock 1940-5-26 6646 Lassen Overflow of Pitt River, 1 mile west of Bieber. Comment
  UCD138002  Damasonium californicum Calvin McMillan; Malcom A. Nobs 1949-6-15 784 Lassen Nubieber. Comment
  GMDRC7740  Danthonia californica J. M. Andre, G. Clifton 1993-6-11 33421 Lassen Modoc Plateau: NW of Snowstorm Mtn, approx. 3 mi. east of Horse Lake, 12 mi. S of Ravendale 1545 Comment
  HSC68921  Danthonia californica Gary Schoolcraft 1980-7-28 329 Lassen E of Tule Mountain and S of Blue Lake. 2043 Comment
  POM115072  Danthonia californica Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  POM172479  Danthonia californica var. americana Franklin P. Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  CHSC66420  Danthonia unispicata Vernon H. Oswald; Lowell Ahart 1996-6-17 7803 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of the trail between Devils Corral Trailhead and the 6.0 mile post. 1420 Comment
  HSC69064  Danthonia unispicata Gary Schoolcraft 1980-7-28 332 Lassen Meadow E of Tule Mountain. 2043 Comment
  UC1024799  Danthonia unispicata Leo Whitney 1935-6-24 3298 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  CHSC106590  Delphinium andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CAS-BOT-BC33220  Delphinium armeniacum Amos Arthur Heller 1938-6-4 15149 Lassen 1 mile E of Fredonyer Pass. 1706 Comment
  CAS-BOT-BC116044  Delphinium nuttallianum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49180 Lassen Sierra Nevada, Elysian Valley northwest of Janesville. 1325 Comment
  UC773881  Delphinium nuttallianum L. R. Short 1936-5-12 S- 347 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1834 Comment
  CAS-BOT-BC116046  Delphinium nuttallianum F. W. Pierson 1926-6-22 6820 Lassen Trail to Devil's Kitchen, Drakesbad, Lassen National Park. Comment
  HSC27054  Delphinium nuttallianum John Pratt 1970-6-11 5 Lassen Fredonyer Pass 1738 Comment
  UC1131416  Deschampsia cespitosa H. S. Yates 1936-8-12 6087 Lassen Westwood Susanville Quad., Westwood Comment
  CDA31657  Deschampsia cespitosa subsp. cespitosa Gordon Leppig, T. LaBanca 1997-6-28 511 Lassen Modoc National Forest, Blue Lake Ranch, peatland in large meadow complex. Comment
  POM203128  Deschampsia cespitosa subsp. cespitosa J. T. Howell 1934-7-9 12517 Lassen Bridges Creek Spring. Comment
  UC1137794  Deschampsia cespitosa subsp. cespitosa George A. Fischer and Irwin H. Johnson 1933-7-15 F 244 Lassen Patterson Flat Lassen Forest, Patterson Flat 1737 Comment
  CAS-BOT-BC192744  Deschampsia danthonioides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16328 Lassen Along southern shore of Eagle Lake Comment
  CHSC112783  Deschampsia danthonioides Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18754 Lassen Drainage filled with dirt from the construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  POM313171  Deschampsia danthonioides Malcolm A. Nobs, S. Galen Smith 1949-7-21 1059 Lassen 4 miles north of Madeline Comment
  CAS-BOT-BC192746  Deschampsia danthonioides Clarence R. Quick 1962-6-17 62 25 A Lassen Swains Hole, a manmade pond in sagebrush flat south of Blacks Experimental Station 1554 Comment
  CAS-BOT-BC201807  Deschampsia elongata George W. Gillett 1957-7-28 925 Lassen Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake 1859 Comment
  CAS-BOT-BC201809  Deschampsia elongata Malcom A. Nobs; S. Galen Smith 1949-7-21 1058 Lassen 4 miles north of Madeline Comment
  HSC23170  Deschampsia elongata D. E. Anderson 1969-7-5 4993 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  UC1131561  Deschampsia elongata A. Simontacchi 1940-7-3 919 Lassen 3.5 mi. w.-s.w. Harvey Mt. Lookout; Lassen Nat'l Forest, Halls Flat Quad. Comment
  CAS-BOT-BC42987  Descurainia incisa subsp. incisa A. M. Vollmer; L. Beane 1953-7-1 13 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  CHSC4811  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected at Eagle Lake Biology Station, e central shore of Eagle Lake. 1524 Comment
  UC1126907  Descurainia pinnata A. Simontacchi 1940-6-4 808 Lassen 14.8 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1783 Comment
  UC1136915  Descurainia pinnata L. R. Short and W. McNulty 1936-6-15 S- 435 Lassen Burgess Spring Experimental Range; Lassen National Forest 1833 Comment
  CAS-BOT-BC43163  Descurainia pinnata subsp. brachycarpa John Thomas Howell 1934-6-10 11902 Lassen 3 miles south of Ravendale. Comment
  UC1143009  Descurainia richardsonii August L. Hormay 1934-5-11 Lassen 2.5 mi nw Hall's Flat; Lassen National Forest 1676 Comment
  CHSC64773  Descurainia sophia Vernon H. Oswald 1995-6-7 6840 Lassen Modoc Plateau. Ridge on the n side of Wendel Rd. (Lassen 320) at milepost 11.0, 5.6 mi e of Wendel, ne of Susanville. Near the road. 1231 Comment
  NY694154  Descurainia sophia G. Schoolcraft 1993-5-25 2268 Lassen North and South of Smoke Creek Road 1463 Comment
  RSA0035397  Descurainia sophia Lowell Ahart, John Dittes 2008-6-20 14912 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC500983  Dichelostemma multiflorum T. S. Brandegee 1892-7-30 s. n. Lassen Susanville Comment
  CAS-BOT-BC292260  Dieteria canescens Margaret Williams; Steven Williams 1974-7-26 74 -L-21 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC299811  Dieteria canescens var. canescens Mrs. H. C. Cantelow 1940-10-5 s.n. Lassen About 1 1/2 mi. N.W. of Johnstonville, east of Sierra Nevada Mts. Comment
  UC1523714  Dieteria canescens var. canescens Gary Schoolcraft 1981-7-21 542 Lassen 1524 Comment
  HSC42427  Dieteria canescens var. shastensis Barbara Kelly 1977-8-9 562 Lassen 16 1/4 miles E of Madeline Comment
  UC1536890  Dieteria canescens var. shastensis G. H. True Jr. 1936-6-25 532 Lassen flats e of Harvey Ranger Station; Harvey Valley 1706 Comment
  UC506907  Dieteria canescens var. shastensis George A. Fischer and Irwin H. Johnson 1933-7-14 F- 268 Lassen Lassen Forest 1752 Comment
  CAS-BOT-BC153632  Diplacus jepsonii Lassen 1927 G. S. Crew 1927-6-25 23 Lassen Norval Flat, Lassen National Forest 1747 Comment
  CHSC68877  Diplacus mephiticus Vernon Oswald; Lowell Ahart 1997-6-24 8597 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. 1685 Comment
  CAS-BOT-BC154007  Diplacus torreyi A. M. Vollmer; L. Beane 1953-7-1 48 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CDA31694  Distichlis spicata T. C. Fuller 1959-7-7 4733 Lassen Hwy 395 just east of Standish. 0 Comment
  UCD64387  Distichlis spicata A. A. Beetle 1941-6-28 2807 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  UCD64451  Distichlis spicata H. S. Yates 1936-8-11 6056 Lassen Near Red Rock. 1341 Comment
  SACT001015  Distichlis spicata var. stricta Malcolm Nobs, S. Smith 1949-7-22 Lassen Both staminate and pistillate, forming a dense turf around high water mark, alkaline. Comment
  CHSC36450  Dodecatheon alpinum Susan H. Euing 1982-6-4 4 Lassen Murrers Upper Meadow. Comment
  CHSC7735  Dodecatheon alpinum Beverley J. Wise 1969-4-20 82 Lassen 14.7 mi. north of Susanville on Hwy 139. 1463 Comment
  SD61013  Dodecatheon alpinum subsp. majus Darley F. Howe 1964-7-31 3899 Lassen Meadow above Blue Lake, Warner Mts., Modoc National Forest 1890 Comment
  UC1137728  Dodecatheon conjugens L. R. Short 1936-4-28 S- 331 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1767 Comment
  CHSC6234  Dodecatheon jeffreyi M. West 1946-6-20 Lassen Meadow above Grasshopper Valley. 1828 Comment
  CHSC113007  Downingia bacigalupii Lowell Ahart; John Dittes 2013-7-22 18875 Lassen Around a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC4763  Downingia bacigalupii R. Carter 1967-7-16 622 Lassen Growing in drying vernal pool along side rd. Comment
  CHSC79144  Downingia bacigalupii Beecher Crampton 1970-6-26 8637 a Lassen Ca. 5 miles west of Susanville. Comment
  CHSC95386  Downingia bacigalupii H. Chappel; J. Goldhammer, K. Moran, K. Strassman 2002-7-9 ALT- 018 Lassen Ecoregion 4. Muck Valley (at top of mountain pass). 1386 Comment
  JEPS120905  Downingia bacigalupii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18738 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1609311  Downingia bacigalupii Vernon H. Oswald and Lowell Ahart 1993-7-8 5677 Lassen ca 11 air mi nnw Poison Lake (n side of Rd 34N12, just e of the railroad at Halls Flat Well) 1737 Comment
  UC2047850  Downingia bacigalupii Debra Valov 2016-6-21 1296 Lassen Bieber; off County Rd. A2 c. 8 km east of Hwy 299; 100 m up private driveway; in dry vernal pool/ditch. Comment
  UCD127933  Downingia bacigalupii Louis K. Mann; M. Pat Mann 1963-6-18 s.n. Lassen On State Highway 139 from Susanville to Adin, 42 miles north of Susanville. Comment
  JEPS114876  Downingia bicornuta var. bicornuta Lowell Ahart, John Dittes 2008-6-20 14945 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA0035911  Downingia bicornuta var. bicornuta Lowell A. Ahart, John Dittes 2008-6-20 14945 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1143175  Downingia bicornuta var. bicornuta Robert W. Gardner 1937-6-26 G- 24 Lassen Poison Lake Halls Flat Quad. 1706 Comment
  UC803945  Downingia bicornuta var. bicornuta G. L. Stebbins Jr., P. Dansereau, C. McMillan, and K. Narayan 1949-8-6 4005 Lassen between Susanville and McArthur (edge of Feather Lake); Feather Lake 1676 Comment
  UC890609  Downingia bicornuta var. bicornuta Elmer I. Applegate 1929-6-24 5883 Lassen just n Bieber (nw corner of Lassen County) Comment
  SEINET12329657  Downingia elegans N. H. Holmgren, Holmgren, P. K. 1978-1 8902 Lassen Madeline Plains, Coyote flat, 14.5 km (9 mi.) east-northeast of Termo and 13 km (8 mi.) airline 1630 Comment
  RSA298985  Downingia insignis Helen-Mar Wheeler 1952-7-11 s.n. Lassen South of Madeline. Comment
  CHSC65304  Downingia laeta Vernon H. Oswald; Lowell Ahart 1995-8-14 7199 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at a BLM reservoir 11.3 mi W of Hwy. 395, N of Susanville. 1737 Comment
  CHSC99496  Downingia laeta Lowell Ahart; John Dittes 2008-6-20 14928 Lassen Bottom of vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS24763  Downingia laeta John H. Weiler, L. Constance, E. Molseed 1960-6-13 60164 Lassen 1.7 mi. s. Ravendale (w. side of U.S. 395) 1615 Comment
  SEINET10539558  Draba David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17801 Lassen 6 mi. N of hallelujah jct. On u.s. Hwy 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge & in sandy wash. 1402 Comment
  SEINET10481008  Draba aurea John G. Lemmon Lemmon s.n. Lassen Lassen's peak in volcanic ashes, CA. Comment
  CHSC508  Draba verna J. Wakeman 1963-5-11 Lassen 6 mi. east of Bieber on hiway 299. Comment
  CHSC108018  Draba verna var. aestivalis Lowell Ahart; John Dittes 2011-6-20 17489 Lassen About 3 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC91326  Draba verna var. aestivalis Lowell Ahart; John Dittes 2005-6-1 11901 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  CAS-BOT-BC159342  Drymocallis lactea var. lactea Louella Bass 1973-6-14 106 Lassen Elysian Valley - Sierra Nevada 1325 Comment
  CHSC27594  Dysphania botrys George Deniso 1978-7-22 85 Lassen E shore of Eagle L., in basalt rock and cattle manure, several ft S of Little Traxel Pt. 1584 Comment
  CHSC112749  Elatine californica Lowell Ahart; John Dittes 2013-7-22 18881 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC60896  Elatine californica Vernon H. Oswald; Lowell Ahart 1993-7-8 5646 Lassen Pittville Rd (Lassen 111, 36N01) near its intersection with 33N11, 0.4 mi N of Hwy. 44, near the SE end of Poison Lake. 1709 Comment
  CHSC60975  Elatine chilensis Lowell Ahart 1993-5-17 6954 Lassen On the west side of Dunstone Road, about 1-1/2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. Comment
  UCD58788  Elatine chilensis Daniel B. Marcum 2007-7-25 s.n. Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  RSA0011453  Eleocharis Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46985 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line 1616 Comment
  JEPS28330  Eleocharis acicularis George W. Gillett 1957-7-29 952 Lassen Snag Lake, shoreline near the E inlet Lassen Volcanic National Park 1850 Comment
  CHSC117180  Eleocharis bella Lowell Ahart; John Dittes 2016-6-7 21015 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  POM11415  Eleocharis montevidensis var. montevidensis Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  CAS-BOT-BC113202  Eleocharis parishii R. F. Thorne; C. W. Tilforth 1969-9-6 39258 Lassen Sandy flats along Long Valley Creek, ca. 14 mi SE of Milford. 1310 Comment
  UC1776676  Eleocharis quinqueflora G. Schoolcraft 1995-5-23 2488 Lassen Three Springs 1554 Comment
  CHSC115611  Elymus cinereus Lowell Ahart; John Dittes 2015-7-14 20327 Lassen On the north side of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1271 Comment
  JEPS121785  Elymus cinereus B. Castro and L. P. Janeway 2012-7-2 1937 Lassen Modoc Plateau. 32 air mi due E of Susanville, 12 mi E of Hwy 395 and 3 mi W of the NV border. East side of Skedaddle Mountains; corral at Skedaddle Ranch. Comment
  CAS-BOT-BC227488  Elymus elymoides John Thomas Howell 1934-7-10 12533 Lassen Between Harvey Valley and Patterson Flats Comment
  UCD61621  Elymus elymoides R. Tofsrud 1947-7-1 217 Lassen East of Madeline. Comment
  UC1136931  Elymus elymoides subsp. elymoides L. R. Short and J. Warren 1936-6-29 S- 461 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1820 Comment
  JEPS126503  Elymus elymoides var. californicus Jocelyn Munoz 2016-8-17 CA 350 -80 Lassen Heading north on 139, turn right onto Horse Lake Road. Continue east on Horse Lake Road passed lake. Take a left on an unnamed road about 3.5 miles east of lake. Then turn right on the first unnamed road with a NW aspect. Comment
  JEPS128170  Elymus elymoides var. californicus M. C. Mahoney, J. A. Nash 2017-7-20 CA 350 -84 Lassen On Snowstorm Mt. From Susanville take Highway 395 N. Turn left onto an unnamed road that heads west onto Snowstorm Mt. Follow thus rough road for ~5 miles before taking a right onto a road going SE towards Snowstorm Mt. summit. About 1 mile up, the population is on either side of this road. Comment
  CHSC29902  Elymus glaucus Robin L. Ondricek 1978-7-22 107 Lassen 1.2 mi e of paved road to the marina on Black Mt. road. 1584 Comment
  CAS-BOT-BC234093  Elymus multisetus John Thomas Howell 1976-7-20 52001 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  JEPS127708  Elymus spicatus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -161 Lassen Juniper Ridge Road, before split with Juniper Tree Road. Population North of road. Comment
  UCR17291  Elymus spicatus Frank C. Vasek 1975-7-11 750711- 02 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  JEPS119960  Elymus trachycaulus Lowell Ahart, John Dittes 2012-7-9 18297 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UCR119182  Elymus trachycaulus Beecher Crampton 1954-7-5 2058 Lassen Modoc Plateau, 4.5 miles west of Susanville along state highway 36. 1433 Comment
  CAS-BOT-BC204359  Elymus trachycaulus subsp. trachycaulus G. Schoolcraft 1994-8-2 2396 Lassen About 2 miles NW of Boot Lake 2438 Comment
  HSC69080  Elymus trachycaulus subsp. trachycaulus Gary Schoolcraft 1980-7-28 333 Lassen Meadow E of Tule Mountain. 2043 Comment
  SEINET12757019  Elymus triticoides B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11527 Lassen Smith Flat on Cedar Creek, 6 or 7 miles E of Madeline, N of County Road 510; Blue Door Flat. 1692 Comment
  POM119924  Ephedra californica Marcus E. Jones 1897-6-23 s.n. Lassen Amedee 1220 Comment
  CAS-BOT-BC81880  Ephedra viridis P. Monnet 1913-7-1 839 Lassen Hot Springs Peak 2133 Comment
  HSC1308  Ephedra viridis K. P. St. John 1965-5-6 17 Lassen 13 mi. N of Litchfield on Hwy. 395 Comment
  NY70786  Ephedra viridis A. J. Cronquist 1959-6-17 8477 Lassen 6 miles northeast of Susanville 1828.8 Comment
  UC281  Ephedra viridis J. Burtt Davy Jun 17 1897-Jun 24 1897 3342 Lassen Honey Lake Valley Honey Lake Valley (on slopes of lava hills) Comment
  CHSC14185  Epilobium brachycarpum M. S. Taylor 1974-7-10 279 Lassen Ca. 50 ft w of road to Gallatin Beach, ca. 5 mi s of Gallatin Beach on Eagle Lake, ca. 10 mi nw of Susanville. 1524 Comment
  JEPS121253  Epilobium brachycarpum Lowell Ahart 2013-7-22 18845 Lassen W margin of duck field, about 10 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SEINET12539665  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  JEPS121248  Epilobium campestre Lowell Ahart, John Dittes 2013-7-22 18850 Lassen About 30 yards S of the man-made pond, about 120 yards south of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles northeast of Bieber, Big Valley. Comment
  UC764398  Epilobium campestre R. F. Hoover 1940-9-21 4602 Lassen 4 mi w Susanville Comment
  CHSC6189  Epilobium ciliatum subsp. ciliatum J. B. Kimsey 1946-6-26 Lassen Pine Creek, Eagle Lake. 1584 Comment
  HSC95176  Epilobium ciliatum subsp. ciliatum Gordon Leppig, Kai Neander, Juli Neander 1997-7-26 690 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  NY1001467  Epilobium ciliatum var. ciliatum M. A. Nobs 1949-8-20 1471 Lassen Honey Lake Valley, 1 mile south of Milford Comment
  CHSC66251  Epilobium hallianum Vernon H. Oswald; Lowell Ahart 1996-6-24 7849 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. On the W side of the meadow just S of the cabins. 1633 Comment
  CHSC27074  Epilobium oregonense Robert A. Schlising 1978-8-1 3333 Lassen SE of Eagle Lake in Murrers Upper Meadow. 1645 Comment
  HSC95331  Epilobium oregonense Gordon Leppig, J. Cromwell 1997-7-27 605 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  UC1609447  Epilobium oregonense Vernon H. Oswald and Lowell Ahart 1993-8-3 5741 Lassen just e Caribou Wilderness (e of Silver Lake, ca 13 air mi n of Lake Almanor); Cooper Swamp 1932 Comment
  SEINET3271522 Image available Epilobium oregonense Marcus E. Jones 1897-6-30 Lassen 4 mi. below Eagle Lake 1524 Comment
  JEPS87409  Epilobium pallidum Vernon H. Oswald and Lowell Ahart 1993-7-8 5673 Lassen Halls Flat Rd (33N18) 1.4 mi ssw Pittville Rd (Lassen 111, 36N01) (ca 5.4 air mi nw of Poison Lake, bed of vernal pool on e side of rd) 1694 Comment
  CHSC96704  Epilobium palustre Gordon Leppig; T. LaBanca, L. Arguello 1997-6-29 538 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CHSC117524  Epilobium torreyi Lowell Ahart; John Dittes 2016-7-13 21126 Lassen West of the pond and along the poor dirt road, 60 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miless (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  NY1000570  Epilobium torreyi N. H. Holmgren 1980-7-3 9492 Lassen Rye Patch Canyon Road, 3.4 km (2.1 mi) east of U.S. Highway 395, 14.5 km (9 mi) airline distance southeast of Ravendale 1700 Comment
  CHSC66368  Equisetum arvense Vernon H. Oswald; Lowell Ahart 1996-6-17 7821 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of a pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  RSA719899  Equisetum laevigatum Michael A. Vincent, K. Levings 2006-7-29 12905 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  SEINET10530241  Equisetum laevigatum Mary Susan Taylor 1982-5-29 Taylor 4566 Lassen 4900 ft. T22N R17E sw/sw sec 23. Loyalton quad. In sandy rd embankment at jct of Scott Rd and Long Valley Creek, ca. 0.5 mi w of Hwy 395, ca. 20 mi n of Reno. 1493 Comment
  CHSC91598  Eragrostis cilianensis G. Douglas Barbe 1978-8-31 2425 Lassen Modoc National Forest. Roadside, Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). 1417 Comment
  CAS-BOT-BC213625  Eragrostis mexicana subsp. virescens John Thomas Howell; G. H. True 1973-7-31 50145 Lassen Susanville 1295 Comment
  CHSC4879  Eremogone congesta R. Carter 1967-6-23 544 Lassen Growing ca. 5 yds. off N side road. Comment
  CHSC118851  Eremogone congesta var. subcongesta L. P. Janeway; B. Castro 2015-6-5 11763 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley toTuledad Canyon, 7.4 road-km south ofSurprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CHSC72310  Eremogone congesta var. subcongesta L. P. Janeway; Glenn Clifton 1998-7-9 5730 Lassen Ridgetop saddle, 1.0 mi east of Diamond Mtn. 2215 Comment
  SEINET12875577 Image available Eremogone congesta var. suffrutescens George W. Gillett 1957-1 945 Lassen Along trail between Butte Lake and Snag Lake. 1859 Comment
  UCD150407  Eremothera boothii subsp. alyssoides William Anderson 1963-6-2 s.n. Lassen Wendel. Comment
  JEPS14047  Eriastrum signatum Rimo Bacigalupi with G. T. Robbins 1955-7-21 5417 Lassen along Smoke Creek rd 6.8 mi e Highway 395 (s edge of valley); Secret Valley Comment
  UC572262  Eriastrum signatum E. Sawyer 1935-6-29 222 Lassen LOng Valley Sierraville Quadrangle 1310 Comment
  CAS-BOT-BC515175  Eriastrum signatum Rimo Bacigalupi; G. T. Robbins 1955-7-21 5417 Lassen Southern edge of Secret Valley, along the Smoke Creek road, 6.8 mi E of US Hwy 395 Comment
  JEPS103167  Eriastrum signatum Beth Corbin 2002-10-2 1115 Lassen Grasshopper Valley, S of Termo-Grasshopper Road. 1633 Comment
  RSA0124149  Eriastrum signatum Christopher Davidson 1975-6-7 2763 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  RSA0125158  Eriastrum signatum Marcus E. Jones 1897-6-22 9972 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  UCD54567  Eriastrum sparsiflorum Ellen Dean; Dawn Cunningham 2005-10-25 2750 Lassen East of the town of Susanville. Property N of California Correctional Facility. 1248 Comment
  JEPS124583 Image available Eriastrum sparsiflorum J. Yamanaka 1965-7-12 123 Lassen Highway 395, 2.6 miles No. of Milford Habitat. Comment
  JEPS124585 Image available Eriastrum sparsiflorum Dixie Funnell 1965-7-12 127 Lassen 2.6 miles north of MIlford. Comment
  SJSU8732  Eriastrum wilcoxii M. D. Fleschner 1965-7-12 Lassen by Hwy 395, 1 mi N of Milburn 1158 Comment
  UCD149881  Eriastrum wilcoxii William Anderson 1963-6-26 s.n. Lassen Honey Lake. Comment
  CAS-BOT-BC286605  Ericameria bloomeri M. S. Taylor; B. Hammond 1982-8-27 5054 Lassen Crystal Peak area, Diamond Mts, ca. 6 air mi sw of Doyle 2377 Comment
  HSC69070  Ericameria bloomeri Gary Schoolcraft 1979-8-15 176 Lassen Tule Mtn. Area 2043 Comment
  SEINET5741365 Image available Ericameria bloomeri Lowell E. Urbatsch, Vensa Karaman 2000-1 7714 Lassen Collected along Forest Road 37N11, off of CA 139. 1220 Comment
  UC1136849  Ericameria bloomeri L. R. Short and J. Warren 1936-8-17 S- 497 Lassen Burgess Spr. Exp. Range Lassen Forest 1767 Comment
  CAS-BOT-BC298174  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-6 2403 Lassen Honey Lake Valley, 3 miles from Wendel on the road to Janesville 1219 Comment
  CAS-BOT-BC298176  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-4 2397 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  SJSU3012  Ericameria nauseosa var. oreophila J. W. Tilden 1967-8-23 1771 Lassen Litchfield, southeastern Lassen County Comment
  HSC68556  Ericameria nauseosa var. speciosa Gary Schoolcraft 1980-8-10 359 Lassen Along Post Camp Rd. N of Shinn Peaks 1890 Comment
  JEPS21518  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass between Shaffer Mt. and Warren Peak Comment
  UC221388  Ericameria nauseosa var. speciosa H. M. Hall 1921-9-11 11680 Lassen 21 mi from Susanville (along roadside, s side of Honey Lake Valley); Honey Lake Valley Comment
  CAS-BOT-BC293009  Ericameria parryi var. nevadensis C. B. Wolf 1931-9-6 2405 Lassen 1/2 mile from Janesville on the road to Wendel - Western edge of Honey Lake Valley 1280 Comment
  UC87724  Erigeron aphanactis var. aphanactis unknown 1892-6-22 Lassen Honey Lake Comment
  CAS-BOT-BC293527  Erigeron aphanactis var. aphanactis P. Monnet 1913-7-6 809 Lassen Hot Springs Peak, S.E. of Lassen County 1828 Comment
  JEPS80681  Erigeron bloomeri L. R. Heckard and T. I. Chuang 1981-6-10 5532 Lassen North Eagle Lake Campground Eagle Lake (nw corner of lake) 1524 Comment
  RSA713118  Erigeron bloomeri L. P. Janeway, B. Castro 2005-7-10 8486 Lassen Northern High Sierra Nevada. Crest of Diamond Mountains overlooking the NW end of Honey Lake, more or less at the north end of Stony Ridge. 1993 Comment
  SEINET8513002 Image available Erigeron bloomeri A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-5-28 s.n. Lassen Costantia Allotment. West of Peterson's 1490 Comment
  CAS-BOT-BC294485  Erigeron bloomeri var. bloomeri John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50676 Lassen Summit ridge of Diamond Mt. 2346 Comment
  CAS-BOT-BC294488  Erigeron bloomeri var. bloomeri John Thomas Howell 1934-7-8 12513 Lassen Harvey Valley Comment
  CHSC48146  Erigeron bloomeri var. bloomeri Vernon Oswald 1986-6-15 2115 Lassen Road between Hwy 139 and Eagle Lake Biological Station, near Black Mtn. 1584 Comment
  UC1368785  Erigeron bloomeri var. bloomeri John L. Strother 1970-5-23 952 Lassen about 6 mi n Honey Lake 1280 Comment
  UCR268961  Erigeron bloomeri var. bloomeri Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31427 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  CAS-BOT-BC296848  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-11 7979 Lassen Big Valley Mts. Comment
  CHSC66373  Erigeron divergens Vernon H. Oswald; Lowell Ahart 1996-6-17 7808 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of the Susan River E of Devils Corral Trailhead and W of the 6.0 mile post. 1402 Comment
  JEPS127271  Erigeron divergens Lowell Ahart, John Dittes 2016-7-13 21106 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS88241  Erigeron divergens Vernon H. Oswald and Lowell Ahart 1996-6-17 7808 Lassen gravel bar on edge of river e Devils Corral Trailhead (Bizz Johnson Trail) (w of 6.0 milepost, trailhead located off of Hwy 36, ca. 7 mi w of Susanville); Modoc Plateau, Susan River 1402 Comment
  UC1924196  Erigeron divergens Debra Valov 2005-8-20 2005234 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  SEINET10475564  Erigeron eatonii var. nevadincola Mary Merello 1993-6-28 Merello 753 Lassen Lassen National Forest. Along Forest Service Road 33N02 to Harvey Mountain Lookout and Harvey Valley. Open pine scrub and sagebrush woodland. 1740 Comment
  CHSC77194  Erigeron eatonii var. plantagineus G. Schoolcraft 1993-6-29 Lassen Ash Valley RNA 16 mi. E. of Adin. 1554 Comment
  CHSC89752  Erigeron eatonii var. plantagineus L. P. Janeway 2004-6-26 8156 Lassen High Cascade Range. About 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  SBBG8127  Erigeron eatonii var. plantagineus H. and M. Dearing 1938-6-30 2233 Lassen N of Susanville [Hwy 44] Comment
  UC1587058  Erigeron eatonii var. plantagineus G. Schoolcraft 1991-6-18 2162 Lassen along Hwy 139 4 mi w Said Valley Res. 1706 Comment
  UC1776680  Erigeron eatonii var. plantagineus G. Schoolcraft 1993-6-29 2313 Lassen Ash Valley RNA 16 miles E of Adin 1554 Comment
  UC87584  Erigeron eatonii var. plantagineus T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  UC87591  Erigeron eatonii var. plantagineus T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  CAS-BOT-BC300425  Erigeron elegantulus Roxana S. Ferris; Rena Duthie 1919-6-12 20 Lassen Madeline Comment
  CHSC101040  Erigeron elegantulus John Dittes 2008-5-22 1523 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 300 feet north by northeast of intersection of Hwy 139 and FS Road 36N02; open, rocky volcanic toe-slope on northeast side of Willow Creek. 482 Comment
  UC31465  Erigeron elegantulus Mrs. C. C. Bruce 1892-6-1 2182 Lassen Madaline Plains Comment
  RSA93190  Erigeron elegantulus F. W. Peirson 1926-6-24 6855 Lassen On Madeline Plain Comment
  POM36253  Erigeron filifolius Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  CAS-BOT-BC295182  Erigeron inornatus John Thomas Howell 1974-7-10 50561 Lassen Elysian Valley 1325 Comment
  CHSC88611  Erigeron inornatus var. calidipetris Linnea Hanson 1998-8-11 378 Lassen Lassen National Forest. Off Hwy. A21 north of Westwood. 1524 Comment
  CHSC92960  Erigeron inornatus var. inornatus L. P. Janeway 2005-8-27 8521 Lassen High Cascade Range. Along Road 22, 2.1 road km west of its beginning/end at Road 35N05 in Little Valley. 1415 Comment
  POM41676  Erigeron inornatus var. inornatus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC295505  Erigeron linearis John Thomas Howell 1934-6-14 12137 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  JEPS41565  Erigeron linearis F. W. Peirson 1926-6-24 6855 Lassen Madeline Plain Comment
  UC585085  Erigeron linearis E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1792 Lassen about 5 mi N of Terno 1371 Comment
  CHSC13846  Erigeron peregrinus var. callianthemus A. W. Harilik 1967-7-11 58 Lassen Collected on road 5.19 ca. 5 mi from Eagle Lake Biology Station. 1524 Comment
  CAS-BOT-BC295959  Erigeron philadelphicus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake 1524 Comment
  CHSC5209  Erigeron philadelphicus M. West 1946-7-10 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CDA34230  Erigeron pumilus subsp. intermedius L. Ahart, J. Dittes 2010-7-31 16986 Lassen About 3,330 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. Comment
  CHSC105241  Erigeron pumilus subsp. intermedius Lowell Ahart; John Dittes 2010-7-31 16986 Lassen About 3,330 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  HSC100803  Erigeron pumilus var. intermedius Lowell Ahart, John Dittes 2010-7-31 16986 Lassen 3,330 ft. N of where the road crosses Hunsinger Draw, 1.9 (air) mi. NW of Moll Reservoir, 2.8 (air) mi. W of Ash Valley, and 8.4 (air) mi. SE of Adin. 1521 Comment
  UC31450  Erigeron pumilus var. intermedius M. S. Baker and Frank Nutting 1894-7-6 Lassen Adobe Meadow Dixey Valley, Adobe meadow Comment
  UC76016  Erigeron pumilus var. intermedius Milo S. Baker 1894-7-1 Lassen Dixey Valley Comment
  NY243318  Eriogonum baileyi G. Schoolcraft 1985-7-29 1490 Lassen Western slopes of Ft. Sage Mtns. 1402.1 Comment
  UC762677  Eriogonum baileyi R. F. Hoover 1940-10-1 4649 Lassen Johnstonville Comment
  SEINET5333913  Eriogonum baileyi D. Tonenna 2007-8-20 s.n. Lassen Hwy 395, 6 mi. north of Halellujah Junction, west of road 1450 Comment
  UCR67382  Eriogonum baileyi var. baileyi George K. Helmkamp 1990-10-4 M 9 A Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  CAS-BOT-BC244039  Eriogonum baileyi var. praebens R. F. Hoover 1940-10-5 4673 Lassen Between Shaffer Mt. and Warren Peak Comment
  CHSC25312  Eriogonum caespitosum Pauleen Broyles 1977-6-1 159 Lassen Lava flow ca 1.6 km se of South Fork Reservoir and 1.6 km n of Skedaddle Ranch Road, ca 10 km ne of Herlong. 1660 Comment
  JEPS19795  Eriogonum collinum Rimo Bacigalupi with S. Galen Smith 1957-6-28 6009 Lassen ne along US Highway 395 Karlo (near headwaters of Secret Creek, n of Secret Valley and w of Rye Patch Canyon); Secret Creek 1615 Comment
  NY242504  Eriogonum collinum A. J. Cronquist 1959-6-17 8478 Lassen 1 mile south of Ravendale, 40 miles northeast of Susanville. 1615.4 Comment
  POM105835  Eriogonum collinum R. M. Austin 1883-09 s.n. Lassen Madaline Plains Comment
  RSA338584  Eriogonum collinum Noel Holmgren, Patricia K. Holmgren 1980-7-3 9485 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  CHSC64805  Eriogonum maculatum Vernon H. Oswald 1995-6-7 6833 Lassen Wendel Rd. (Lassen 320) at milepost 9.5, 4.1 mi e of Wendel, ne of Susanville. 1231 Comment
  CHSC65157  Eriogonum maculatum Vernon H. Oswald; Lowell Ahart 1995-7-5 6961 Lassen North of Honey Lake on Smoke Creek Ranch Rd., 1.2 mi w of the Nevada-California state line. 1335 Comment
  UC1305802  Eriogonum maculatum Noel H. Holmgren, James L. Reveal 1964-8-22 1724 Lassen 18 mi s along U.S. 395 Ravendale (35 mi ne of Susanville) Comment
  POM203841  Eriogonum marifolium J. T. Howell 1934-7-9 12521 Lassen Pine Creek Flat Comment
  NY282208  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 1982-9-8 912 Lassen In Robinson Canyon west of Doyle Ca. 1585.0 Comment
  NY572524  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 1982-7-20 807 Lassen Lower slopes of Wagner Canyon 1402.1 Comment
  UC762680  Eriogonum nidularium R. F. Hoover 1940-9-29 4643 Lassen pass between Mt. Shaffer and Warren Peak Comment
  POM105409  Eriogonum nudum var. deductum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CAS-BOT-BC261445  Eriogonum nudum var. nudum Clare B. Hardham 1969-8-28 17442 Lassen West of Janesville Comment
  CHSC105258  Eriogonum nudum var. nudum Lowell Ahart; John Dittes 2010-7-31 16983 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  SD13333  Eriogonum nudum var. nudum R. V. Chamberlain 1935-9-8 6584 Lassen Guernsey Creek Comment
  JEPS126468  Eriogonum nudum var. pubiflorum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-27 CA 350 -071 Lassen Along Rice Canyon Road and into Rice Canyon. Comment
  UCR259107  Eriogonum nummulare John F. Emmel 1993-7-29 1284 Lassen Southeast Honey Lake Valley, 4.1 air miles west and 1.3 air miles south of Calneva railroad stop, c. 2 air miles north of peak of Turtle Mountain 1256 Comment
  SEINET5333908  Eriogonum ochrocephalum D. Tonenna 2007-8-20 s.n. Lassen Hwy 395, 6 mi north of Halellujah Junction along west side of road. 1450 Comment
  UC54767  Eriogonum ovalifolium var. ovalifolium J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amadee Honey Lake Valley, Amadee Comment
  RSA0030656  Eriogonum ovalifolium var. purpureum Anthony Baniaga 2011-7-9 439 Lassen Lassen National Forest. Windy Hollow. Pine Creek Valley quadrangle. 1716 Comment
  UC1032335  Eriogonum spergulinum var. reddingianum A. Simontacchi 1940-6-5 811 Lassen 3.9 mi nw Cone Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC272623  Eriogonum spergulinum var. reddingianum M. S. Baker; Frank Nutting 1894-1-1 s.n. Lassen Unspecified Comment
  RSA716265  Eriogonum sphaerocephalum L. Ahart, John Dittes 2005-6-2 11984 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Road and Highway 70; 5.8 mi. (air) northwest of Hallelujah Junction. 1431 Comment
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Jun 1 2009
  JEPS94611  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald and Lowell Ahart 1997-5-27 8491 Lassen e side of Hwy 139 at small farm pond 38.2 mi n Susanville (7.4 mi n of Eagle Lake Rd.) 1627 Comment
  CHSC64885  Eriogonum sphaerocephalum var. sphaerocephalum Vernon H. Oswald; Lowell Ahart 1995-6-19 6875 Lassen Between Litchfield and Revendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395. 1383 Comment
  SEINET11261382  Eriogonum sphaerocephalum var. sphaerocephalum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3921 Lassen 1.9 rd miles west of jct with Hwy 395 on Dawn Dr on E side of Shaffer Mountain. Ca 18 air mi ene of downtown Susanville.; 0 1545 Comment
  CHSC25913  Eriogonum strictum var. anserinum K. R. Stern 1967-6-24 2438 Lassen Murrer Meadow Road, ca. 2.5 mi SE of Eagle Lake Biology Station. 1554 Comment
  UC1249283  Eriogonum strictum var. anserinum Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8473 Lassen 50 mi se Susanville 1371 Comment
  JEPS85787  Eriogonum strictum var. proliferum Roy E. Buck, Robert A. Price 1988-6-26 1028 Lassen on subsidiary peak ca. 0.5 air km n main summit (Fredonyer Peak; ca. 30 air km nne of Susanville); Fredonyer Peak 2377 Comment
  CAS-BOT-BC267889  Eriogonum umbellatum Hans Leschke 1964-9-3 1892 Lassen Cinder Cone, Lassen Volcanic National Park Comment
  JEPS127724  Eriogonum umbellatum Alejandro Brambila, Michael Dolan 2016-8-2 CA 320 -181 Lassen Head north on unnamed road west of Holbrook Reservoir from Ash Valley Road. Comment
  UCR248974  Eriogonum umbellatum Elizabeth A. Kempton, Tim Tibault 2006-7-29 418 Lassen town of Chester, vacant lot at intersection of Willow Way and Main Street 1388 Comment
  CAS-BOT-BC267887  Eriogonum umbellatum Clarence R. Quick 1962-8-3 62 -89 Lassen Delasmutt Ranch, Hw. 44, nr. Susanville-Old Station, along dirt road to Blacks Mt. E.F. Hdqtrs. 1615 Comment
  CHSC13632  Eriogonum umbellatum var. modocense M. S. Taylor 1974-7-13 306 Lassen Ca. 150 ft w of Mahogany Lake, ca. 5 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC4436  Eriogonum umbellatum var. modocense K. R. Stern 1967-7-1 2461 Lassen Ca. 16 mi. NE of Susanville. State Hwy 139. Comment
  UC161881  Eriogonum umbellatum var. modocense T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  UC773862  Eriogonum umbellatum var. nevadense L. R. Short and J. Warren 1936-6-12 S- 432 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1804 Comment
  POM253241  Eriogonum umbellatum var. polyanthum A. A. Heller 1938-6-23 15190 Lassen 3 mi. east of Westwood. Comment
  RSA766453  Eriogonum ursinum C. Epling, Wm. Robinson 1935-7-17 s.n. Lassen Chaos Crags, Lassen Park Comment
  CAS-BOT-BC262365  Eriogonum vimineum Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CHSC4953  Eriogonum vimineum R. Carter 1967-6-27 561 Lassen Growing ca. 10 yds off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 Comment
  CHSC56867  Eriogonum vimineum Mary Meyer 1980-7-3 Lassen North of Jeep trail going up drainage above camping pullover. 1584 Comment
  CHSC61233  Eriogonum vimineum P. V. Caldwell 1972-6-17 227 Lassen Eagle Lake B. Station. Outside and around Tom Rodgers Hall. Comment
  HSC63561  Eriogonum vimineum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6006 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS127353  Eriogonum vimineum Lowell Ahart, John Dittes 2016-7-13 21132 Lassen 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  NY399609  Eriogonum vimineum J. L. Reveal 1971-6-22 2464 Lassen Along U.S. Highway 395, 4.5 miles south of Ravendale Comment
  SEINET14417545  Eriogonum vimineum Robert L. Johnson, Mikel R. Stevens 2015-1 3924 Lassen 1.9 rd miles west of jct with Hwy 395 on Dawn Dr on E side of Shaffer Mountain. Ca 18 air mi ene of downtown Susanville.; South to southwest-facing slope. 1545 Comment
  UC1032093  Eriogonum vimineum E. Sawyer 1935-6-27 240 Lassen 3.5 mi ne Beckwith Pass; Sierraville Quadrangle Comment
  UC1258486  Eriogonum vimineum G. Schoolcraft 1979-6-19 78 B Lassen Painter's Flat 1719 Comment
  UC6518  Eriogonum vimineum M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CAS-BOT-BC262355  Eriogonum vimineum David D. Keck 1930-7-23 951 Lassen Susanville 1280 Comment
  CAS-BOT-BC262358  Eriogonum vimineum M. S. Jussel 1931-9-6 s.n. Lassen On the road to Mt Lassen, five miles from Westwood 1828 Comment
  CAS-BOT-BC262368  Eriogonum vimineum John Thomas Howell 1934-7-8 12493 Lassen Spalding's, Eagle Lake Comment
  HSC69595  Eriogonum vimineum J. Walker 1979-7-18 37 Lassen Near Skedaddle Creek, S portion 1311 Comment
  NY399577  Eriogonum vimineum H. D. D. Ripley 1943-6-15 5763 Lassen Northeast of Viewland 1341.1 Comment
  HSC97608  Eriophorum gracile Vernon H. Oswald, L. Ahart 1996-6-24 7888 Lassen Papoose Meadows, 0.5 mi. E of Eagle Lake Rd. (A1) and 2.5 mi. S of Eagle Lake, Modoc Plateau 1634 Comment
  SEINET10672052  Eriophyllum lanatum Paul Gallian, David B. Dunn 1971-6-2 Gallian 517 Lassen 6 mi. N of Hallelujah Jct., on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  UC1393123  Eriophyllum lanatum var. achilleoides John L. Strother 1970-5-23 956 Lassen about 6 mi n of Honey Lake 1280 Comment
  UC1249275  Eriophyllum lanatum var. achilleoides Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8469 Lassen 50 mi se Susanville Comment
  CHSC106076  Eriophyllum lanatum var. grandiflorum Lowell Ahart; John Dittes 2010-7-31 17024 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1118288  Eriophyllum lanatum var. integrifolium H. P. Hagge 1929-9-11 18 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. (Mb.1) 1828 Comment
  CHSC116092  Erodium cicutarium Lowell Ahart; John Dittes 2015-7-13 20320 Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA715976  Erodium cicutarium L. Ahart, John Dittes 2005-6-2 11923 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4.75 miles (air) N of the intersection of Scott Road and Hwy 70, 6.2 miles (air) NW of Hallelujah Junction. 1460 Comment
  UC1130283  Erodium cicutarium E. Sawyer 1935-6-27 241 Lassen 3.5 mi ne Beckwith Pass; Sierraville Quad. 1524 Comment
  UC1487304  Eryngium alismifolium Yusuf Sheikh and Lincoln Constance 1973-6-27 549 Lassen 4.3 mi S of Ravendale (on State Highway 395) Comment
  UC1508837  Eryngium alismifolium Gary Schoolcraft 1981-8-11 558 Lassen Silva Flat Reservoir 1706 Comment
  SEINET8673757  Eryngium alismifolium G. L. Stebbins Jr., Dansereau, P.; McMillan, C.; Narayan, K. 1949-8-6 4000 Lassen Hog Flat, n.w. of Susanville. 1676 Comment
  UC585097  Erysimum capitatum var. capitatum E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1766 Lassen ne slope of ridge near summit east of Red Rock 1818 Comment
  POM203959  Erysimum repandum J. T. Howell 1934-6-10 11904 Lassen 3 miles S of Ravendale. Comment
  CHSC66266  Erythranthe breweri Vernon Oswald; Lowell Ahart 1996-6-24 7850 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  SBBG15427  Erythranthe breweri H. and M. Dearing 1939-7-1 2244 Lassen 17 mi W of Susanville Comment
  CHSC43496  Erythranthe primuloides Lowell Ahart 1974-7-9 521 Lassen In a meadow along the south shore of Eagle Lake. 1584 Comment
  CHSC4974  Erythranthe primuloides D. L. Stites 1967-7-14 168 Lassen 3 mi e of turnoff to Silver Lake on highway 44. 1524 Comment
  SEINET3836923 Image available Erythranthe primuloides Marcus E. Jones 1897-1 Lassen Near Pratville, Clear Creek 1524 Comment
  SEINET10528918  Erythronium purpurascens Marcus E. Jones 1897-7-7 Jones s.n. 1897 Lassen Lassen's Peak 6000 feet. 1830 Comment
  UC1561401  Eschscholzia californica Barbara Ertter 1987-7-24 7297 Lassen ca 3/4 mi ene Beckwourth Pass (at end of old crumbling paved road) 1524 Comment
  UC1562582  Eucephalus breweri Barbara Ertter 1988-7-25 7865 Lassen ca 10 airmi due s of, (ridge of Diamond Mts ca 1.5 mi e of Diamond Peak) Susanville; Diamond Mts. 2255 Comment
  SEINET9594781  Euphorbia crenulata D. W. Taylor 2012-7-18 21273 Lassen Along Hwy 44, pumice flat nestled in the cones ca 2 miles S of the S end of Poison Lke. 1783 Comment
  UCD39131  Euphorbia crenulata Beecher Crampton 1964-6-25 7072 Lassen 25 miles n.w. Susanville State Hwy. 44, Bogard Ranger Station, Lassen National Forest. 1722 Comment
  UCD142787  Euphorbia serpillifolia J. M. Tucker 1950-7-25 1974 Lassen Road from Pittville, 35 miles northwest of Susanville. Comment
  UC29863  Eurybia integrifolia Milo S. Baker 1894-7-30 Lassen Silver Lake Comment
  SD112378  Eurybia integrifolia Darley F. Howe 1964-8-2 3919 Lassen East Creek, Warner Mountains, Modoc National Forest. 2010 Comment
  CAS-BOT-BC458296  Euthamia occidentalis Louella Bass 1980-8-1 s.n. Lassen Sierra Nevada: Standish Comment
  CAS-BOT-BC278432  Festuca idahoensis Clarence R. Quick 1961-6-21 61 -28 Lassen Adjacent to Road 21, Blacks Mountain Experimental Forest northeast of Lassen Peak 1798 Comment
  CAS-BOT-BC278437  Festuca idahoensis John Thomas Howell 1934-7-6 12430 Lassen Hall's Flat Comment
  CHSC27575  Festuca idahoensis Robert Schlising 1978-7-11 3316 Lassen S of Eagle Lake at Papoose Creek. 1584 Comment
  CHSC42184  Festuca idahoensis C. E. Laver 1985-8-12 Lassen Ca. 8.5 mi se of Madeline and 9 mi ne of Termo. 2194 Comment
  CHSC60867  Festuca idahoensis Vernon H. Oswald; Lowell Ahart 1993-6-28 5585 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. In a meadow. 1731 Comment
  JEPS17718  Festuca idahoensis Rimo Bacigalupi with G. T. Robbins 1955-7-19 5371 Lassen 10.3 mi se Adin (along Ash Valley road between Adin and Madeline) 1524 Comment
  UC60788  Festuca idahoensis J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Long Valley Honey Lake Valley Comment
  UCD65974  Festuca idahoensis L. Whitney 1935-6-17 3268 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10. Comment
  UCR244064  Festuca microstachys Jim Andre, G. L. Clifton 1993-6-9 19690 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CHSC117218  Festuca microstachys var. microstachys Lowell Ahart; John Dittes 2016-6-7 21002 Lassen Near Stonebreaker Road, 0.7 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC53777  Festuca pratensis M. S. Baker and Frank Nutting 1894-6-30 Lassen near Bieber; Big Valley Comment
  JEPS71219  Festuca rubra Brown and Wieslander 1922-7-23 80 Lassen Comment
  UCD66364  Festuca rubra A. H. Shunk 1923-1 13 Lassen Hayden Hill. Comment
  UCD66393  Festuca rubra A. L. Hormay 1941-6-26 27 Lassen Lassen National Forest. Westwood Junction. 1737 Comment
  CHSC60393  Fragaria virginiana Mary Ann Showers 1992-6-12 2521 Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  CHSC61058  Fragaria virginiana Vernon H. Oswald; Lowell Ahart 1993-8-3 5756 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. Along the margin of the swamp. 1932 Comment
  SJSU6086  Frasera albicaulis var. nitida J. W. Tilden 1960-6-27 1509 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  UC1523707  Fraxinus latifolia Gregg Riegel 1981-6-17 1128 Lassen in and along Beaver Creek Beaver Creek 1280 Comment
  HSC26684  Fritillaria atropurpurea D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19220 Lassen 3 mi. N of Westwood Comment
  CAS-BOT-BC504437  Fritillaria atropurpurea John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49174 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  POM109791  Fritillaria pudica Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  JEPS126534  Galium aparine Lowell Ahart, John Dittes 2016-6-7 21020 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  JEPS127170  Galium aparine Lowell Ahart, John Dittes 2016-7-15 21223 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  RSA647556  Galium aparine Marion P. Harthill 1972-6-16 s.n. Lassen Doyle. Comment
  CHSC59565  Galium bifolium Mary Meyer 1980-7-20 518 Lassen On west side of Fredonyer Peak. 2377 Comment
  POM203777  Galium bolanderi J. T. Howell 1934-7-3 12381 Lassen Near Dry Lake. Mtns. SE of Bieber. Comment
  HSC95186  Galium trifidum Gordon Leppig, Tony LaBanca 1997-6-29 540 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC60407  Galium trifidum var. pacificum Mary Ann Showers 1992-6-13 2552 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  RSA201314  Galium trifidum var. pusillum J. T. Howell 1959-9-23 34886 Lassen N end of Juniper Lake. 2058 Comment
  CHSC36176  Gayophytum diffusum Jerry Snodgrass 1978-6-28 1 Lassen Lower Dry Lakes e of Eagle Lake. 1645 Comment
  RSA0004469  Gayophytum helleri var. erosulatum W. L. Jepson 1918-8-2 7754 Lassen Beckwith Pass 1463 Comment
  CHSC105245  Gayophytum heterozygum Lowell Ahart; John Dittes 2010-7-31 17025 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  POM38695  Gayophytum heterozygum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  RSA768780  Gayophytum heterozygum L. Ahart, John Dittes 2010-7-31 17025 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1521 Comment
  HSC63969  Gayophytum humile Teresa Prendusi 1980-7-1 1121 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  UC1122618  Gayophytum racemosum A. Simontacchi 1940-6-6 821 Lassen 10.1 mi se Nigger Cabin; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD150409  Gayophytum racemosum Harry A. George 1967-6-15 s.n. Lassen Willow Creek Ranch. Comment
  RSA74475  Gayophytum ramosissimum Milo S. Baker 1936-6-16 8364 Lassen About 30 miles north of Susanville Comment
  UC725738  Gentianopsis simplex A. A. Heller 1942-9-7 16536 Lassen shore of Summit Lake, Lassen Volcanic Nat'l Park Lassen Volcanic Nat'l Park, Summit Lake Comment
  CHSC30615  Geranium viscosissimum var. nervosum L. Maslin 1975-7-1 2 Lassen Corn lily mdw. over the ridge s of Deans mdw. 1920 Comment
  RSA0029585  Geranium viscosissimum var. nervosum Bruce Bartholomew, B. Anderson 1988-6-25 4372 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  UC1037208  Geum macrophyllum var. perincisum Leo Whitney 1933-8-14 1568 Lassen 8 mi nw of Eagle Lake (Lassen National Forest, Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  JEPS94471  Geum triflorum Vernon H. Oswald and Lowell Ahart 1997-5-27 8504 Lassen 0.1 mi e of Highway 139 (n of Susanville on Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat, on creek paralleling the road); Forest Route 38N04 1546 Comment
  RSA91873  Geum triflorum var. ciliatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA0086587  Gilia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  RSA470172  Gilia brecciarum Christopher Davidson 1975-6-7 2757 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  POM72193  Gilia congesta Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  JEPS94702  Gilia inconspicua Vernon H. Oswald and Lowell Ahart 1998-5-22 9107 Lassen 5 mi nne of Doyle (Road to ORV parking area in Fort Sage Mountains, 0.5 mi e of Fort Sage Road); Fort Sage Mountains 1371 Comment
  JEPS94830  Gilia inconspicua Vernon H. Oswald and Lowell Ahart 1998-5-22 9107 Lassen 5 mi nne of Doyle (Road to ORV parking area in Fort Sage Mountains, 0.5 mi e of Fort Sage Road); Fort Sage Mountains 1371 Comment
  UC604679  Gilia modocensis Farris Farris 1935-6-15 Lassen Susanville 1310 Comment
  RSA95714  Gilia modocensis Verne Grant, Alva Grant 1955-6-8 9666 A Lassen c. 2 miles north of Doyle. 1311 Comment
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May 2 2012
  CHSC93697  Gilia ochroleuca Lowell Ahart; John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  CHSC25309  Gilia salticola Pauleen Broyles 1977-6-1 156 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 Comment
  JEPS109641  Gilia sinistra subsp. sinistra Dean W. Taylor 2002-6-21 18171 Lassen Highway 139 ca. 10 miles N of Susanville, ca. 1 mile south of the southerly end of Willow Creek Valley 1524 Comment
  CHSC25915  Gilia sinuata K. R. Stern 1967-7-1 2437 Lassen Murrer Meadow Road, ca. 2.5 mi SE of Eagle Lake Biology Station. 1554 Comment
  CHSC71242  Gilia sinuata Vernon H. Oswald; Lowell Ahart 1998-6-4 9146 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  SBBG52268  Gilia sinuata C. Davidson 1975-6-7 2756 Lassen 1 mi E of Beckwourth Pass on Hwy 70 Comment
  UC1609120  Gilia sinuata Vernon H. Oswald and Lowell Ahart 1993-6-14 5545 Lassen ca. 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd. (Lassen A1), at Sandy Beach on the w shore Eagle Lake); w shore Eagle Lake, at Sandy Beach 1566 Comment
  JEPS123845  Glyceria borealis Lowell Ahart, John Dittes 2015-7-14 20326 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  OBI77053  Glyceria borealis Anthony Baniaga 2011-7-23 463 Lassen Lassen NF. Poison Lake. Poison Lake quad T32N R7E sec 4 1700 Comment
  CAS-BOT-BC280597  Glyceria elata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49473 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC280599  Glyceria elata John Thomas Howell; Gordon H. True 1973-8-1 50184 A Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CHSC113079  Gnaphalium palustre Lowell Ahart; John Dittes 2013-7-22 18861 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99290  Gnaphalium palustre Lowell Ahart; John Dittes 2008-6-22 15032 Lassen About 120 yards west of the road levee, on the banks of a small natural drainage, open meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  UC1483835  Gnaphalium palustre G. Schoolcraft 1980-7-22 Lassen nw of BLM fire station (along Hwy 395) 1630 Comment
  CHSC106078  Gratiola ebracteata Lowell Ahart; John Dittes 2010-7-31 17012 Lassen Bottom of small wash, about 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC60414  Gratiola ebracteata Mary Ann Showers 1992-6-13 2543 Lassen Shoreline at western end of Widow Lake. Lassen Volcania National Park. 2072 Comment
  CHSC117760  Gratiola heterosepala Virginia Dains; Joanne Crawford 2016-6-9 Lassen Modoc Plateau. BLM Eagle Lake Field Office. 8 km southeast of Horse Lake, 23 km northwest of Shaffer Mtn. 1470 Comment
  CHSC7711  Grayia spinosa Beverley J. Wise 1969-5-18 7 Lassen 13.4 mi. east of Susanville on Las. Co. Rd 216 off Las. Co. Rd. 215. 1524 Comment
  HSC27351  Grayia spinosa D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19302 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  UC1136436  Grayia spinosa E. Sawyer 1935-6-27 226 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UC585073  Grayia spinosa E. B. Babcock and G. L. Stebbins Jr. 1936-6-8 1777 Lassen 4 mi. s. Ravendale (n. end Secret Valley); n. end Secret Valley 1371 Comment
  UC7402  Grayia spinosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3273 Lassen Honey Lake Valley Comment
  UCD55266  Grayia spinosa Ellen Dean 2006-5-15 3064 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1249 Comment
  SEINET4175755  Grayia spinosa F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  CHSC117540  Grindelia nana Lowell Ahart; John Dittes 2016-7-13 21197 Lassen Drying strand of the pond near the overflow, 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UCD132463  Grindelia nana Dan Marcum 1978-7-3 s.n. Lassen exact location unknown. Comment
  SEINET5709433 Image available Grindelia squarrosa Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7709 Lassen Willow Creek. Collected along CA 139.; Willow Creek 1428 Comment
  UC1776686  Grindelia squarrosa var. serrulata G. Schoolcraft 1999-8-23 2880 Lassen Near turnoff to Janesville along Hwy 395 1280 Comment
  UC1533130  Gymnosteris parvula G. Schoolcraft 1986-5-14 1567 Lassen near road at stateline in Tuledad Canyon Tuledad Canyon 1524 Comment
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Nov 4 2011
  RSA170326  Gypsophila paniculata T. C. Fuller 1963-7-16 10923 Lassen Lassen County: N of Cemetery from which ti escaped, Janesville Comment
  CDA36783  Gypsophila paniculata D. B. Joley 1976-6-22 1 Lassen Janesville. 0 Comment
  SEINET3818101  Habenaria leucostachys A. A. Heller 1938-1 Lassen Comment
  CAS-BOT-BC231154  Hackelia cusickii G. Schoolcraft 1988-7-7 1810 Lassen About 14 air miles NE of Ravendale 1798 Comment
  CAS-BOT-BC231156  Hackelia cusickii Mrs. A S. Baldwin 1928-5-1 s.n. Lassen Coyote Flat, over ridge from Dixie Village Comment
  JEPS67931  Hackelia micrantha Jos. Grinnell 1928-6-29 Lassen Butte Lake 1889 Comment
  POM72793  Hackelia micrantha Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CDA36354  Halogeton glomeratus B. Villegas 2011-8-25 Lassen Near Wendel; on Wendel Rd., 0.4 mile from Amadee Rd. 0 Comment
  CHSC7647  Helianthus annuus Beverley J. Wise 1948-8-23 21 Lassen 5 mi. N.W. of Susanville of Las. Co. Rd. 201. 1371 Comment
  UC1192217  Helianthus annuus Verne Grant and Irving Schneider 1947-7-31 8215 Lassen irrigation ditch ne quarter George Williams section 19; Madeline Plain Comment
  CAS-BOT-BC305662  Helianthus cusickii David D. Keck; J. Clausen 1935-6-24 3739 Lassen 2 mi. S. of Ravendale 1464 Comment
  RSA17683  Helianthus cusickii Elmer I. Applegate 1934-5-4 8927 Lassen South end of Secret Valley Comment
  CAS-BOT-BC305785  Helianthus nuttallii Herbert L. Mason 1947-8-11 13492 Lassen Highway 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  RSA783699  Heliotropium curassavicum R. R. Halse 2010-8-25 8086 Lassen Along State Hwy 139 ca. 26.2 mi N of Susanville on NE shore of Eagle Lake. 1559 Comment
  SEINET10497129  Heliotropium curassavicum var. oculatum Mary Susan Taylor 1974-1 Taylor 269 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC91196  Hemizonella minima Lowell Ahart; John Dittes 2005-6-2 11940 Lassen Along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1600 Comment
  CHSC30620  Hesperochiron californicus Eric Miller 1975-7-9 14 Lassen E. of Dirt road adjacent to Coleman Lake, 30 ft. S. of overflow. 1950 Comment
  CHSC7686  Hesperochiron californicus Beverley J. Wise 1969-4-20 45 Lassen 14.6 mi. north of Susanville on Hwy 139 (Willow Creek Valley). 1463 Comment
  CHSC5258  Hesperochiron pumilus J. B. Kimsey 1946-6-11 Lassen Aspen Grove, Pine Creek near Eagle Lake. 1584 Comment
  SEINET5499822  Hesperochiron pumilus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  UC1069088  Hesperochiron pumilus A. Simontacchi 1940-5-9 696 Lassen 4.4 mi. s.-s.e. of B.M. 7310 on Blacks Mt.; Lassen Nat'l Forest, Halls Flat Quad. Comment
  CAS-BOT-BC180030  Hesperochiron pumilus E. K. Balls 1950-5-19 14770 Lassen Ash Creek Public Camp, off rd. from Adin to Madeline. Comment
  JEPS17743  Hesperolinon micranthum Rimo Bacigalupi with G. T. Robbins 1955-7-21 5416 Lassen along Smoke Creek Ranch Rd. 6 mi e jnct. with U.S. 395; Bull Flat, Deep Creek 1428 Comment
  JEPS27188  Hesperolinon micranthum Lauramay T. Dempster 1961-6-17 1670 Lassen about 4 mi sw junction with Richmond Road (s of Susanville); Gold Run Creek Comment
  NY1002357  Hesperolinon micranthum G. Schoolcraft 1984-7-30 1324 Lassen About 1 mile east of Post Camp 1707 Comment
  UC1523712  Hesperolinon micranthum Gary Schoolcraft 1981-6-25 478 Lassen East Fork of Wellard Creek 1584 Comment
  UC17262  Hesperolinon micranthum M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixey Mts. Comment
  POM87379  Hesperolinon micranthum Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  RSA127454  Hesperolinon micranthum Peter H. Raven, Otto T. Solbrig 1958-6-17 13300 Lassen 8.0 miles north of Madeline along Unites States Highway 395. Comment
  CAS-BOT-BC310910  Heterotheca villosa Margaret Williams 1974-7-27 74- 61 -61 Lassen West of Hwy 395 and south of Hwy 70. Near Hallelujah Junction 1493 Comment
  UCR244106  Heterotheca villosa Jim Andre, G. L. Clifton 1993-6-9 19697 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CAS-BOT-BC312418  Hieracium albiflorum John Thomas Howell; Gordon H. True 1973-8-1 50220 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  CHSC98320  Hieracium greenei B. Castro; L. P. Janeway 2005-7-10 1505 Lassen Northern High Sierra Nevada. Ca 1-2 mi E of Westwood, on N side of Hwy 36. In flat open ridge area within Jeffrey pine/Pondersosa pine forest. Township/Range approximate location. 1566 Comment
  CDA7975  Hieracium scouleri T. C. Fuller 1963-7-15 12904 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  CHSC105247  Hieracium scouleri var. nudicaule Lowell Ahart; John Dittes 2010-7-31 16973 Lassen About 3,330 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) southeast of Adin. 1508 Comment
  UC20698  Hippuris vulgaris J. Burtt Davy Jun 17 1897-Jun 24 1897 3334 Lassen Honey Lake Valley, Honey Lake 1219 Comment
  OBI77055  Hordeum brachyantherum Anthony Baniaga 2011-8-4 487 Lassen Lassen NF. About 1/2 mi WNW of Griffith Hill along 30n21. Swain Mtn quad. T30N R8E sec 8 NE of NW 1907 Comment
  SEINET7297784 Image available Hordeum brachyantherum A. A. Beetle 1941-1 2818 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak, open meadow. Comment
  CAS-BOT-BC280876  Hordeum brachyantherum subsp. brachyantherum A. A. Beetle 1941-6-28 2800 Lassen 10 miles west of Chester 1524 Comment
  UC506970  Hordeum brachyantherum subsp. brachyantherum George A. Fischer and Irwin H. Johnson 1933-7-12 F 232 Lassen Patterson Flat 1737 Comment
  UC53617  Hordeum brachyantherum subsp. brachyantherum M. S. Baker and Frank Nutting 1894-7-4 Lassen Dixey Valley Comment
  CAS-BOT-BC284714  Hordeum jubatum John Thomas Howell; Gordon H. True 1973-8-1 50198 Lassen Ca. 3 miles se. of Diamond Mt., summit of Diamond Range south of Susanville 2194 Comment
  JEPS28711  Horkelia fusca subsp. tenella George W. Gillett 1957-7-29 942 Lassen 1/4 mi above Butte Lake (Along trail between Butte Lake and Snag Lake); Lassen Volcanic National Park 1859 Comment
  UC1609471  Horkelia fusca subsp. tenella Vernon H. Oswald and Lowell Ahart 1993-6-28 5577 Lassen 0.2 mi n Hwy 44 (Harvey Valley Rd (33N02), e side of Grays Valley, e of Poison Lake); e of Poison Lake, e side of Grays Valley 1749 Comment
  CAS-BOT-BC536220  Horkelia fusca var. parviflora Louella Bass 1973-6-15 EV- 112 Lassen Elysian Valley, Sierra Nevada 1325 Comment
  CAS-BOT-BC514265  Horkelia fusca var. pseudocapitata Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC71324  Horkelia tridentata subsp. tridentata Vernon H. Oswald 1998-6-22 9229 Lassen Champs Flat Rd. (A-21) 1.6 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1764 Comment
  RSA122624  Hydrophyllum capitatum var. alpinum L. R. Short 1936-4-28 S- 333 Lassen MDM, Burgess Spr. Exp. Range. 1753 Comment
  SEINET10472162  Hypericum formosum subsp. scouleri Mary Susan Taylor 1974-1 Taylor 283 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC41841  Hypericum formosum var. scouleri P. V. Caldwell 1972-7-13 271 Lassen Eagle Lake. Growing scattered on edge of upper Papoose Creek above forest road to Papoose Meadows. Comment
  SEINET5344266  Hypericum scouleri C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  CHSC52812  Iliamna bakeri G. Schoolcraft 1981-7-29 552 Lassen On rocky slopes of McDonald Peak near top. 2377 Comment
  NY52523  Iliamna bakeri G. Schoolcraft 1983-8-3 1129 Lassen 5 miles w of Madeline 1767.8 Comment
  SD61029  Iliamna bakeri Darley F. Howe 1964-8-2 3924 Lassen Hillside above Parsnip Creek, Warner Mountains; Modoc National Forest. 1829 Comment
  UC1037223  Ipomopsis aggregata Leo Whitney 1934-7-6 1591 Lassen ca 14 mi w Eagle Lake (near Harvey Valley Spring); Lassen National Forest, Harvey Valley Comment
  HSC69077  Ipomopsis aggregata Gary Schoolcraft 1979-7-12 145 Lassen NW side of Shinu Peaks 2134 Comment
  CHSC13883  Ipomopsis aggregata subsp. formosissima S. Villard 1973-7-12 65 Lassen Gallatin Peak. 1066 Comment
  RSA18257  Ipomopsis aggregata subsp. formosissima Wolf 1929-9-1 3785 Lassen Mt. Lassen National Park between Grassy Lake and Snag Lake Comment
  CHSC59781  Ipomopsis congesta Mary Meyer 1980-7-15 Lassen Found in ash barrens. 1546 Comment
  CHSC111244  Iris missouriensis B. Castro; L. P. Janeway 2012-7-2 1936 Lassen Modoc Plateau. 32 air mi due E of Susanville, 12 mi E of Hwy 395 and 3 mi W of the NV border. East side of Skedaddle Moun-tains; large meadows along Skedaddle Creek, just upstream from 'Skedaddle Ranch. 1604 Comment
  CHSC36461  Iris missouriensis Susan H. Euing 1982-6-4 15 Lassen Ca. 3/4 mi n of Murrer's Upper Meadow. Comment
  CHSC36493  Iris missouriensis Theresa Costa 1982-6-4 33 Lassen Ca. 3/4mi n Murrer's Upper Meadow. Comment
  RSA0025414  Isoetes nuttallii Forrest Freund 2013-5-23 192 Lassen HWY 44. Depression on the north side of the road. Plants in open patches near center of the pool. 1653 Comment
  UC2062873  Isoetes nuttallii Forrest Freund 2016-5-19 258 Lassen Pappoose meadow. Comment
  CHSC117178  Isoetes orcuttii Lowell Ahart; John Dittes 2016-6-7 21016 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC77255  Isolepis G. Schoolcraft 1997-8-4 2675 Lassen W of Willow Creek Valley. 1554 Comment
  CHSC30626  Iva axillaris T. M. Lane 1975-7-7 41 Lassen Along Hwy 395, 5 km nnw of Termo; 56 km s of Alturas. 1815 Comment
  SD64329  Iva axillaris Darley F. Howe 1966-8-25 Lassen 41 miles south of Alturas on Highway 395. 1675 Comment
  CHSC76086  Iva axillaris subsp. robustior Lowell Ahart; Vernon H. Oswald 1999-9-13 8227 Lassen Along a slough, on the north side of Mapes Road, about 1/2 mile east of Lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 Comment
  UC1037332  Iva axillaris subsp. robustior Leo Whitney 1934-9-5 1958 Lassen Fredonyer Pass; Lassen National Park 1676 Comment
  UC1537066  Iva axillaris subsp. robustior Gordon H. True Jr. 1936-6-21 517 Lassen se of Litchfield; Honey Lake Valley 1219 Comment
  CHSC57121  Ivesia paniculata Mary Meyer 1980-7-1 Lassen Ash Valley. 1402 Comment
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Jan 15 2009
  HSC77272  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin, 16.25 mi. W of Madeline Comment
  CHSC30562  Juncus balticus Sori H. Shad 1970-7-1 5 Lassen Found on the side of spring above Gallaten Beach. 2438 Comment
  UC1100949  Juncus balticus Verne Grant and Irving Schneider 1947-7-31 8211 Lassen ne quarter of George Williams section 19 Madeline Plain Comment
  HSC26016  Juncus bryoides F. J. Hermann 1972-5-17 24752 Lassen 8 mi. W of Susanville 1677 Comment
  CHSC117520  Juncus bufonius var. bufonius Lowell Ahart; John Dittes 2016-7-13 21140 Lassen Scattered along the south edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest ofk Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC117196  Juncus bufonius var. congestus Lowell Ahart; John Dittes 2016-6-7 20987 Lassen 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS67134  Juncus ensifolius W. L. Jepson 1918-8-2 7794 Lassen Constantia Honey Lake Valley 1219 Comment
  JEPS126565  Juncus hemiendytus var. hemiendytus Lowell Ahart, John Dittes 2016-6-7 20991 Lassen 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CAS-BOT-BC312669  Juncus luciensis John Thomas Howell; Louella Bass 1974-7-10 50538 Lassen Elysian Valley 1325 Comment
  POM111106  Juncus mexicanus Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  CHSC67714  Juncus nevadensis James D. Jokerst 1983-7-25 1899 Lassen Madeline Plains W of Termo. Comment
  HSC95327  Juncus nevadensis Gordon Leppig 1998-6-12 933 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95328  Juncus nevadensis Gordon Leppig 1998-7-12 946 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1601786  Juncus nevadensis Baker and Nutting 1894-7-25 Lassen Willow Creek Comment
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Jul 3 2013
  CHSC106359  Juncus trilocularis Lowell Ahart; John Dittes 2010-7-31 17026 Lassen About 20 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC3494  Juniperus californica Roger Jaegel 1966-5-14 152 Lassen Located twenty-two miles north of Susanville, along the bank of Eagle Lake at C. S. C. Biological Station. Comment
  CHSC5076  Juniperus occidentalis A. W. Harvilik 1967-6-23 9 Lassen Ca. 50 ft from Eagle Lake Biology Station. 1554 Comment
  HSC1267  Juniperus occidentalis L. H. Myers 1963-4-10 40 Lassen 1.0 mi. S of Janesville 1280 Comment
  UC333780  Juniperus occidentalis unknown 1893-5-28 Lassen Susanville Comment
  UC773866  Juniperus occidentalis L. R. Short 1936-9-30 S- 508 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1828 Comment
  UCD133784  Juniperus occidentalis K. M. Meyer; A. Townesmith 2007-7-19 132 Lassen Lassen National Forest. Ca. 0.2 mile on 29N03, off Hwy 36 on pullout just past a dry creek. 1459 Comment
  UCR164508  Juniperus occidentalis Maile Neel 2000-4-29 G- 2 Lassen Northern Sierra Nevada Mountains, Lassen National Forest, six miles west of Susanville on Hwy 36, at intersection with Eagle Lake Road (A1) near Eagle Lake Ranger Station, 1400 Comment
  SEINET10613513  Juniperus occidentalis subsp. australis Mary Susan Taylor 1982-5-29 Taylor 4570 Lassen T22N R17E e1/2 sw1/4 sec 23. Loyalton quad. In sagebrush Scrub along dirt road paralleling Highway 395 on its east side, ca 1/2 mile north of 395 jct with Scott Road, ca 20 miles northof Reno. 1525 Comment
  SEINET10932817  Juniperus occidentalis subsp. australis Mary Susan Taylor 1982-5-29 Taylor 4570 Lassen T22N R17E e/sw sec 23. Loyalton quad. In Sagebrush Scrub along dirt rd paral- leling Hwy 395 on its e side, ca. 0.5 mi n of 395 jct with Scott Rd, ca. 20 mi n of Reno. 5000 ft. 1524 Comment
  UCR4282  Juniperus occidentalis var. australis Frank C. Vasek 1965-8-31 650831- 06 Lassen 3.8 mi west of the Ranger Station at Susanville Comment
  UCR4284  Juniperus occidentalis var. occidentalis Frank C. Vasek 1965-9-1 650901- 01 Lassen On Karlo Road 3.6 mi north of the junction of Karlo Road & Litchfield Road, north of Susanville 1355 Comment
  SEINET11056886  Juniperus occidentalis var. occidentalis D. Charlet 1993-7-13 1582 Lassen Fort Sage Mountains, along road W of OHV trailhead. 1450 Comment
  NY20362  Juniperus osteosperma N. H. Holmgren 1970-7-28 4625 Lassen This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UCR148843  Juniperus osteosperma David A. Charlet 1993-7-13 1581 Lassen Great Basin, Fort Sage Mountains at O.H.V. trailhead 1491 Comment
  SEINET11066903  Juniperus osteosperma G. Schoolcraft 1998-4-27 2705 Lassen N end of Fort Sage Mountains, W slope. 1951 Comment
  CHSC57200  Kelloggia galioides Mary Meyer 1980-7-21 Lassen Beneath white fir stand. 2103 Comment
  CHSC60409  Kelloggia galioides Mary Ann Showers 1992-6-13 2541 Lassen Lassen Volcanic National Park. Along trail from Snag Lake jct to Widow Lake. 1828 Comment
  NY539721  Kochia americana G. Schoolcraft 1998-9-14 2808 Lassen Honey Lake Valley northwest of Duck Lake 1219.2 Comment
  CHSC60869  Koeleria macrantha Vernon H. Oswald; Lowell Ahart 1993-6-28 5586 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. In meadow. 1731 Comment
  CHSC99520  Koeleria macrantha Lowell Ahart; John Dittes 2008-6-19 14896 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC1132160  Koeleria macrantha A. Simontacchi 1940-7-8 945 Lassen 5.2 mi s Jelly Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1483844  Koeleria macrantha G. Schoolcraft 1980-7-28 335 Lassen e side Tule Mountain; e side of Tule Mtn. 2042 Comment
  UCD85786  Koeleria macrantha Beecher Crampton 1960-6-18 5727 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD86011  Koeleria macrantha L. Whitney 1935-6-24 s.n. Lassen Squaw Valley. Comment
  UC891450  Kyhosia bolanderi A. A. Heller 1937-9-1 15342 Lassen about a mile e of Westwood Comment
  JEPS94084  Lactuca saligna Vernon H. Oswald and Lowell Ahart 1998-9-8 9574 Lassen Hwy. 299 at the R.R. overpass on e. side of Nubieber (near the hwy.) 1255 Comment
  UC74070  Lactuca tatarica subsp. pulchella J. Burtt Davy 1897-6-17 Lassen Comment
  JEPS127275  Lagophylla ramosissima Lowell Ahart, John Dittes 2016-7-13 21109 Lassen 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  RSA0009792  Lagophylla ramosissima Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  JEPS94782  Lagophylla ramosissima subsp. ramosissima Vernon H. Oswald and Lowell Ahart 1998-9-8 9575 Lassen Highway 299 at the Rail Road overpass on the e side of Nubieber Nubieber; , Highway 299 1255 Comment
  RSA0042601  Lasthenia glaberrima Lowell A. Ahart, John Dittes, Todd Sloat 2013-6-8 18739 Lassen About 100 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1268 Comment
  POM29621  Lathyrus Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  CAS-BOT-BC321493  Layia glandulosa Noel H. Holmgren; Patricia K. Holmgren 1980-7-4 9506 Lassen Observation Peak, S side of mountain, 18 km (11 mi) airline distance E of Ravendale 1890 Comment
  CHSC106679  Layia glandulosa B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CAS-BOT-BC321491  Layia glandulosa Milo S. Baker 1936-6-16 8360 Lassen About 30 mi N of Susanville along Hwy 395. Comment
  POM54275  Layia glandulosa subsp. glandulosa Milo S. Baker 1890-1 s.n. Lassen Milford. Comment
  RSA170169  Lemna minor W. L. Jepson 1918-8-16 8000 Lassen Merrillville 1524 Comment
  HSC95315  Lemna minuta Gordon Leppig, Tony LaBanca 1997-6-29 526 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC4789  Lemna trisulca R. Carter 1967-7-13 591 Lassen Ca. 5 mi E of Eagle Lake Biology Station, at point where rd. comes nearest to Willow Creek. 1560 Comment
  UC1101266  Lemna trisulca Malcolm A. Nobs, S. Galen Smith 1949-7-22 1076 Lassen 10 mi n of Susanville (along Willow Creek, Willow Creek Valley); Willow Creek Valley, Willow Creek Comment
  CAS-BOT-BC88821  Lepidium campestre Louella Bass 1974-5-23 EV 143 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CHSC99531  Lepidium chalepense Lowell Ahart; John Dittes 2008-6-20 14978 -B Lassen Where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC88939  Lepidium dictyotum Arnold Tiehm 1980-5-29 5747 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air mile north-northwest of Wendel. 1231 Comment
  NY76542  Lepidium latifolium G. Schoolcraft 1984-7-31 1330 Lassen Along Highway 395 about 1 mile north of Ravendale Fire Station 1615.4 Comment
  CHSC13634  Lepidium perfoliatum M. S. Taylor 1974-7-8 259 Lassen On e side of RT A3, ca. 1 mi n of Honey Lake, ca. 1 mi s of Standish, Honey Lake Wildlife Refuge. Comment
  CHSC64873  Lepidium perfoliatum Vernon H. Oswald; Lowell Ahart 1995-6-19 6899 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. Near the road. 1383 Comment
  HSC63973  Lepidium perfoliatum J. P. Smith, J. O. Sawyer 1971-5-23 4665 Lassen Junction of Hwy. 139 and road to Thermo Comment
  UCD115849  Lepidium perfoliatum R. Tofsrud 1951-7-13 s.n. Lassen Susanville area. Comment
  OBI48159  Lepidium perfoliatum Rhonda Riggins 1989-4-27 1642 Lassen US 395, 14 mi N Litchfield, 21 mi S Ravendale 1311 Comment
  UC106733  Leptodactylon pungens T. S. Brandegee 1892-6-29 Lassen Janesville Comment
  UC1123943  Leptodactylon pungens E. Sawyer 1935-6-27 230 Lassen Long Valley; Sierraville Quad., Long Valley Comment
  UC584301  Leptodactylon pungens G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2284 Lassen summit and e slope of Diamond Mt. 2194 Comment
  CHSC61229  Leptosiphon ciliatus P. V. Caldwell 1972-6-29 260 Lassen Eagle Lake. Stream that runs into Upper Deans Meadow, on bank. Comment
  CHSC4794  Leptosiphon harknessii R. Carter 1967-6-29 571 Lassen Roadside, n side of rd. On rd to Murrer's Medow. Eagle Lake. 1584 Comment
  CHSC60372  Leptosiphon harknessii Mary Ann Showers 1992-6-12 2518 Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  SEINET3364450 Image available Leptosiphon harknessii Marcus E. Jones 1897-7-2 Lassen Susanville Comment
  CAS-BOT-BC334598  Leucanthemum vulgare G. Schoolcraft 1987-6-17 1746 Lassen Along Hwy 36 about 3 miles east of Westwood 1554 Comment
  CHSC61192  Leucocrinum montanum Vernon H. Oswald; Lowell Ahart 1993-5-12 5375 Lassen NE side of Hwy. 44, 1.6 mi NW of its intersection with A21 (to Westwood). 1737 Comment
  OBI83366  Leucocrinum montanum Rhonda Riggins 1989-4-27 1650 Lassen US 395, 1.1 mi N Madeline, 8.8 mi S Modoc Co line 1676 Comment
  SEINET3887154 Image available Leucocrinum montanum D. W. McNeal 1981-5-10 2488 Lassen Beside Hwy. #395, 4.3 mi. S. of Ravendale.; 0 Comment
  SEINET12326117  Leucophysalis nana A. Seneres, Harold, N. 1983-1 101 Lassen Road 21 to Silver Lake, Lassen National Forest 1821 Comment
  CHSC61168  Lewisia pygmaea Vernon H. Oswald; Lowell Ahart 1993-5-12 5387 Lassen Hwy. 44 between Poison Lake and A21 (to Westwood), 1.6 mi SE of Pittsville Rd. In a meadow on the N side of the road. 1719 Comment
  CAS-BOT-BC283770  Leymus cinereus John Thomas Howell 1973-7-10 49770 Lassen Near Westwood 1554 Comment
  CDA7155  Leymus cinereus G. Schoolcraft 1993-9-18 s.n. Lassen 1 mile N of Sagehen on W side of Hwy 395. Comment
  UC188958  Leymus cinereus Milo S. Baker Lassen Dixie Valley Comment
  RSA126617  Leymus condensatus H. S. Yates 1936-8-12 6086 Lassen McKenzie Meadows 1524 Comment
  UCD86642  Leymus triticoides J. Earl Coke 1931-6-1 s.n. Lassen Lassen County. 1524 Comment
  CAS-BOT-BC436029  Ligusticum grayi George W. Gillett 1957-7-21 870 Lassen Lassen Volcanic National Park: Cameron Meadow 1950 Comment
  CAS-BOT-BC436030  Ligusticum grayi B. C. Cain 1925-8-24 106 Lassen 1 mi. below Drakesbad, Mt. Lassen Natio,al Park 1645 Comment
  POM109716  Lilium pardalinum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  HSC15584  Lilium pardalinum subsp. pardalinum Fred J. Kindel 1955-7-8 Lassen Susan River Comment
  CHSC59098  Limosella acaulis Vernon H. Oswald; Lowell Ahart 1992-8-25 5188 Lassen Grassy Creek at the E end of Snag Lake. Lassen Volcanic National Park. 1850 Comment
  CHSC60855  Limosella aquatica Vernon H. Oswald; Lowell Ahart 1993-6-28 5602 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  UC1101431  Limosella aquatica Malcolm A. Nobs and S. Galen Smith 1949-7-20 1046 Lassen Bieber Comment
  RSA0011457  Linanthus R. F. Thorne, Larry E. DeBuhr 1975-8-22 46973 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  POM74675  Linanthus pungens subsp. pulchriflorus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA715980  Linum lewisii L. Ahart, John Dittes 2005-6-2 11935 Lassen Along the poor dirt road, 1/4 mile W of the Anderson Ranch home, Long Valley about 4 3/4 miles air N of the intersection of Scott Road and Hwy 70, 6.5 miles air NW of Hallelujah jct. 1499 Comment
  CHSC80221  Linum lewisii var. lewisii Jeanne Boze 1981-6-12 110 Lassen Along road to 5 corners, 3.1 from Eagle Lake Field Station. 1737 Comment
  JEPS117582  Linum lewisii var. lewisii Lowell Ahart, John Dittes 2010-7-31 16981 Lassen Dry meadow 10 yards northeast of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  CAS-BOT-BC435428  Lithophragma glabrum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49166 Lassen Elysian Valley northeast of Janesville; Sierra Nevada 1325 Comment
  SEINET6032241  Lithophragma glabrum J. A. Young 1978-4-13 s.n. Lassen Meyers Ranch, Adin Comment
  CAS-BOT-BC428415  Lithophragma tenellum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49165 Lassen Elysian Valley northwest of Janesville. 1325 Comment
  CHSC29956  Lithophragma tenellum Robin L. Ondricek 1978-5-25 25 Lassen 150 yds N of cafeteria at Eagle Lake Field Station. 1554 Comment
  JEPS119670  Lithospermum arvense Lowell Ahart, John Dittes 2012-7-11 18351 Lassen About 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittvile, 3955 feet east of Lassen - Shasta County Line, Fall River Valley. Comment
  CHSC91203  Lithospermum ruderale Lowell Ahart; John Dittes 2005-6-2 11932 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  POM101211  Loeflingia squarrosa Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  JEPS118183  Lomatium dissectum var. multifidum Dean W. Taylor 2004-5-11 19059 Lassen 1.5 miles southwest of Constantina along Highway 395 1402 Comment
  RSA452590  Lomatium donnellii Christopher Davidson 1975-6-7 2755 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  JEPS125805  Lomatium foeniculaceum subsp. macdougalii William Harnach 2010-6-8 1243 Lassen 2 miles west of the California Nevada state line, north side of Fort Sage Road, northeast of Doyle, CA. Comment
  NY1160625  Lomatium macrocarpum N. H. Holmgren 1980-7-3 9487 Lassen U.S. Highway 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  UC1479579  Lomatium macrocarpum G. Schoolcraft 1980-4-8 204 Lassen just n. Viewland (w. side of Hwy. 395) 1371 Comment
  RSA517344  Lomatium nevadense Barbara Ertter, Gary Schoolcraft 1987-6-16 s.n. Lassen Skeedaddle Mountains on NE side of Honey Lake 2134 Comment
  RSA0049670  Lomatium nevadense var. nevadense Dean Wm. Taylor 2012-5-15 21196 Lassen Windmill Flat vicinity; one mile north of the north end (watershed East Fork Juniper Creek, tributary to Pit River at Big Valley) 1676 Comment
  UC1123082  Lomatium nevadense var. nevadense A. Simontacchi 1940-5-10 689 Lassen 7.3 mi. w. Harvey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  SEINET5333506  Lomatium nevadense var. nevadense D. H. French 1968-6-3 2883 Lassen Near Hwy, 395, 1.1 mi S of Ravendale, just behind gas station-cafe-bar building. Comment
  UC1123036  Lomatium nevadense var. parishii K. E. Bradshaw 1939-5-27 241 A Lassen Plot 39-1 Black Mt. Exp. Forest (Lassen Nat'l Forest); , Halls Flat Quad., Black Mt. Exp. Forest Comment
  UC1123084  Lomatium nevadense var. parishii A. Simontacchi 1940-5-10 689 A Lassen 7.3 mi. w. Havey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  JEPS103161  Lomatium plummerae G. Schoolcraft 1996-5-13 2519 Lassen Ft. Sage OHV area 3 mi. NE of Doyle 1402 Comment
  UC1730232  Lomatium plummerae L. P. Janeway and Glenn Clifton 1998-7-8 5721 Lassen ridgetop saddle 2.5 mi NW of Red Rock (junction of Roads 28N08, 29N10, 213, and 28N55) 1988 Comment
  JEPS25531 Image available Lomatium ravenii Rimo Bacigalupi with Lincoln Constance 1959-6-16 7145 Lassen 2 mi. s. Ravendale 1615 Comment
  LA35567  Lomatium ravenii Lincoln Constance; Rimo Bacigalupi 1959-6-14 3672 ISOTYPE Lassen 1 mi. S of Ravendale 1462 Comment
  UC1559672 Image available Lomatium ravenii Gary Schoolcraft 1988-5-4 1792 Lassen ca. 3 mi. s.e. Ravendale 1615 Comment
  UC1924598  Lomatium triternatum Debra Valov 2006-5-28 2006008 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1305 Comment
  POM78250  Lomatium vaginatum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  RSA0049611  Lomatium vaginatum Dean Wm. Taylor 2012-6-7 21232 Lassen Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139 1635 Comment
  RSA370319  Lomatium vaginatum A. Tiehm, Margaret Williams, Gary Schoolcraft 1986-5-12 10345 Lassen 6.7 road miles east of Highway 395 on dirt road to Smoke Creek and the Smoke Creek Desert 1418 Comment
  UC1594612  Lotus nevadensis var. nevadensis Vernon H. Oswald and Lowell Ahart 1992-7-16 5106 Lassen 1.2 mi se County Rd. A21 (Long Lake on s side of Hwy 44, between Old Station and Susanville); Long Lake 1745 Comment
  CHSC117281  Ludwigia palustris Lowell Ahart; John Dittes 2016-7-15 21220 Lassen About 50 yards west of the road and about 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC37703  Lupinus arbustus M. S. Taylor 1982-8-27 5051 Lassen Crystal Peak, Diamond Mt, 6 air mi sw of Doyle. 2377 Comment
  JEPS28489  Lupinus arbustus George W. Gillett 1957-7-29 956 Lassen near the Butte Lake Trail (above Snag Lake); , near the Butte Lake Trail 1859 Comment
  SEINET12765226  Lupinus arbustus Vernon H. Oswald 1997-6-24 8635 Lassen South of Susan ville near the small pond on the crest of Diamond Mtn. about midway between Aspen Flat and Red Rock Lookout.; 0 2249 Comment
  POM252845  Lupinus arbustus subsp. silvicola A. A. Heller 1938-6-4 15142 Lassen In open places near Fredonyer Pass. 1707 Comment
  UC1553386  Lupinus argenteus G. Schoolcraft 1988-8-24 1856 Lassen 16 mi e Adin; Ash Valley RNA/ACEC 1554 Comment
  UCD35223  Lupinus argenteus var. argenteus Beecher Crampton 1954-7-6 2079 Lassen Madeline. 1524 Comment
  CAS-BOT-BC208734  Lupinus argenteus var. heteranthus Walter Knight; Irja Knight 1981-5-20 4116 Lassen 27 miles S of Alturas Comment
  CAS-BOT-BC208736  Lupinus argenteus var. heteranthus W. W. Eggleston 1927-7-14 21497 Lassen 7 1/2 miles north of Bogard Staton, Bogard Ranger Station, Lassen Forest 1500 Comment
  CHSC36284  Lupinus argenteus var. heteranthus M. S. Taylor 1982-6-12 4653 Lassen In Doyle, ca. 0.5 mi e of Hwy 395. Comment
  CHSC99140  Lupinus argenteus var. heteranthus Lowell Ahart; John Dittes 2008-6-19 14873 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  NY736930  Lupinus argenteus var. heteranthus G. H. True Jr. 1936-6-27 556 Lassen Near top of Hot Spring Mountain 1829 Comment
  SD147580  Lupinus argenteus var. heteranthus John Thomas Howell, Gordon H. True, Margaret Williams 1973-5-12 49232 Lassen On Hwy 395 NW of Doyle on the road to Milford 1280 Comment
  UC1129448  Lupinus argenteus var. heteranthus A. E. Wieslander June 1929 109 Lassen Constantia; Sierraville Quad. Comment
  UC1537121  Lupinus argenteus var. heteranthus Gordon H. True Jr. 1936-6-27 556 Lassen near top Hot Spring Mountain; near top of Hot Spring Mountain 1828 Comment
  CHSC93547  Lupinus argenteus var. meionanthus Lowell Ahart; John Dittes 2005-6-2 11937 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1600 Comment
  POM253163  Lupinus caudatus A. A. Heller 1938-6-23 15203 Lassen Along U.S. Highway 395 just outside of Johnstonville. Comment
  RSA160037  Lupinus caudatus David B. Dunn 1956-7-3 11914 Lassen At junction of Highway 395 and 36 near Johnstonville. 6 miles east of Susanville. Comment
  RSA59517  Lupinus caudatus E. K. Balls 1950-5-21 14824 Lassen Standish, 7 miles from junction of Highway 36 and 395. 1250 Comment
  SEINET10490608  Lupinus caudatus subsp. caudatus Jeffrey Huber 1971-6-2 Huber 145 Lassen 6 mi. N of halleluja jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffrey pine along high ridge and in sandy wash. 1402 Comment
  SEINET10490714  Lupinus caudatus subsp. caudatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 481 Lassen 5 mi. S of milford near honey lake on us hwy 395; along roadside in grass - Artemesia tridentata assoc.; Quercus - jeffery pine on mountain range to w at Approx. The same altitude. 1250 Comment
  SEINET10969761  Lupinus caudatus subsp. caudatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 511 Lassen 6 mi. N of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  RSA3037  Lupinus confertus Carl B. Wolf 1931-9-6 2404 Lassen 0.5 mile from Jonesville on road to Wendel, western edge of Honey Lake Valley 1280 Comment
  SEINET10940170  Lupinus confertus Thomas W. Nelson, Jane P. Nelson 1981-7-17 Nelson 6735 Lassen Along State Route 395, 22 mi S of Susanville, California, at milepost marker 46.80. Sagebrush scrub. Comment
  SEINET10687175  Lupinus croceus Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 154 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  UC169643  Lupinus lepidus var. confertus T. S. Brandegee 1892-6-27 Lassen Milford Comment
  HSC103613  Lupinus lepidus var. confertus Thomas W. Nelson, Jane Nelson 1981-7-17 6735 Lassen Along State Route 395, 22 mi. S of Susanville at milepost 46.80 Comment
  SDSU4676  Lupinus lepidus var. confertus D. F. Howe 1960-9-21 2993 Lassen 2 miles north of Janesville on #395. 1219 Comment
  SEINET8051636  Lupinus lepidus var. confertus G. Schoolcraft 1992-8-11 2246 Lassen Along Highway 395 near inters. of Janesville Road 1280 Comment
  CHSC60356  Lupinus lepidus var. sellulus Mary Ann Showers 1992-6-13 2535 Lassen Lassen Vocanic National Park. Trail from Snag Lake jct to Widow Lake. 1828 Comment
  SEINET9185950 Image available Lupinus leucophyllus Anthony Baniaga 2011-1 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  UC1129770  Lupinus leucophyllus A. Simontacchi 1940-6-30 908 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC15910  Lupinus leucophyllus M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC99103  Lupinus microcarpus var. microcarpus Lowell Ahart; John Dittes 2008-6-20 14969 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC15846  Lupinus microcarpus var. microcarpus Mrs. R. M. Austin and Bruce June 1898 2145 Lassen Madaline Plains Madaline Plains <Madeline Plains>; Madaline Plains Comment
  RSA0005616  Lupinus onustus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC138031  Lupinus onustus T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  JEPS118457  Lupinus polycarpus Lowell Ahart, John Dittes 2011-6-20 17498 Lassen 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  NY747611  Lupinus polyphyllus var. saxosus H. D. D. Ripley 1944-5-30 5982 Lassen 2 miles south of Madeline 1707 Comment
  UC1523758  Lupinus saxosus Gary Schoolcraft 1983-6-7 968 Lassen near Ash Valley 1706 Comment
  RSA263046  Lupinus sellulus subsp. sellulus B. J. Cox 1971-6-11 3179 Lassen 8 mi. W. of Susanville, on Calif. Hwy. 36. 1555 Comment
  SEINET10490263  Lupinus subvexus var. transmontanus David B. Dunn 1956-7-3 Dunn 11925 Lassen Collected on roadside among volcanic rocks. Along hwy 395, 5.5 mi s of likely, Before dropping into valley. Color lavender. Sagebrush common. Comment
  HSC95306  Lycopus uniflorus Gordon Leppig, Juli Neander, Kai Neander 1997-7-25 681 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS127348  Lythrum hyssopifolia Lowell Ahart, John Dittes 2016-7-13 21125 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC112974  Lythrum tribracteatum Lowell Ahart; John Dittes 2013-7-23 18902 Lassen Dry drainage, about 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  SEINET10872918  Machaerocarpus californicus Mary Susan Taylor 1982-6-12 Taylor 4647 Lassen T29N R10E ne/nw sec 13. Westwood quad. Aquatic in still pond on n side of West Fork of Susan River, s side of Hwy 36 at jct w/ Willow Cr Rd, 8 mi w Susanville. Comment
  CAS-BOT-BC342645  Madia citrigracilis John Thomas Howell 1934-7-8 12494 Lassen Spalding's, Eagle Lake 1584 Comment
  UC905682  Madia citrigracilis David D. Keck 1930-7-23 949 Lassen Susanville Sierra Nevada, Susanville 1280 Comment
  CAS-BOT-BC342657  Madia citriodora David D. Keck; J. Clausen 1935-6-25 3761 Lassen Susanville 1300 Comment
  CHSC4904  Madia elegans Bill Wilson 1967-7-15 163 Lassen Collected at Eagle Lake Biological Station, 10 mi. N of Susanville, outside laboratory building. 1584 Comment
  UC1136966  Madia elegans L. R. Short 1936-6-26 S- 457 Lassen Burgess Spr. Exp. Range Lassen Forest 1837 Comment
  UCR67469  Madia elegans George K. Helmkamp 1990-10-4 M 11 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  SD50990  Madia elegans Darley F. Howe 1960-9-21 Lassen 2 miles north of Janesville on #395 Comment
  UCD134243  Madia elegans J. E. Stuart 1929-8-1 2035 Lassen Roy Hardwood Ranch, Milford. Comment
  CHSC45693  Madia glomerata Vernon Oswald 1986-7-22 2217 Lassen Hwy 36, 11.3 mi e of the Plumas-Lassen County line, 0.5 mi sw of Fredonyer Pass. 1691 Comment
  SEINET11601445 Image available Madia gracilis J. A. Young 1982-6-9 s.n. Lassen M. Meyer's Ranch, Adin, Ca. 1372 Comment
  CAS-BOT-BC347441  Malacothrix floccifera Louella Bass 1973-6-23 131 Lassen Elysian Valley 1325 Comment
  CHSC80607  Malacothrix glabrata V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10038 Lassen North-northeast of Doyle on a dirt road bordering the east side of Turtle Mountain. 1828 Comment
  SEINET11601669 Image available Malacothrix glabrata F. B. Henning 1915-5-28 s.n. Lassen Honeylake, Calif. Comment
  UC186080  Malacothrix glabrata unknown 1892-6-22 Lassen Honey Lake Comment
  JEPS121255  Malva neglecta Lowell Ahart, John Dittes 2013-7-22 18877 Lassen E of drainage, 40 yards S of the man-made pond, about 110 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  HSC25433  Marsilea vestita D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19177 Lassen Harvey Valley near Cone Springs Comment
  RSA252423  Marsilea vestita R. F. Thorne, C. W. Tilforth 1969-9-5 39139 Lassen Said Valley Reservoir. Comment
  RSA0011558  Marsilea vestita R. F. Thorne, Larry E. DeBuhr 1975-8-22 46994 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CHSC65287  Marsilea vestita subsp. vestita Vernon H. Oswald; Lowell Ahart 1995-8-14 7201 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at BLM reservoir 11.3 mi W of Hwy. 395, N of Susanville. 1737 Comment
  JEPS127277  Marsilea vestita subsp. vestita Lowell Ahart, John Dittes 2016-7-13 21130 -B Lassen 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS97378  Marsilea vestita subsp. vestita Vernon H. Oswald and Lowell Ahart 1995-8-14 7201 Lassen N of Susanville (Horse Lake Rd (Lassen 536) at a BLM reservoir, 11.3 mi W of Hwy 395); Modoc Plateau 1737 Comment
  JEPS114634  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-20 14911 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS93831  Matricaria discoidea Vernon H. Oswald and Lowell Ahart 1998-6-4 9138 Lassen Red Rock Road at its junction with Highway 395 s of Constantia; Red Rock Road 1365 Comment
  SEINET3816871  Matricaria discoidea Noel H. Holmgren, Patricia K. Holmgren 1980-7-5 9522 Lassen Upper smoke creek drainage, 20.4 km from U.S. highway 395 via Rye Patch Canyon, 24 km airline distance southeast of Ravendale, 1580 Comment
  CAS-BOT-BC348267  Matricaria occidentalis M. S. Taylor 1982-6-12 4651 Lassen In Hartson Lake Refuge, ca. 1 mi n of Hartson Lake on n side of Honey Lake, ca. 13 mi se of Susanville 1222 Comment
  CDA8329  Matricaria occidentalis T. C. Fuller 1963-7-15 10886 Lassen East of road to Susanville, 2.2 miles southeast of Pittville. 0 Comment
  SEINET10475266  Matricaria occidentalis Mary Susan Taylor 1982-6-12 Taylor 4651 Lassen 4010 ft. T28N R14E se sec 3. Standish quad. Alkali flats in Hartson Lake Refuge, 1 mi n of Hartson Lake on n side of Honey Lake, ca. 13 mi se of Susanville. 1222 Comment
  CHSC93666  Medicago lupulina Lowell Ahart; John Dittes 2005-6-2 11966 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  CHSC68889  Melica fugax Vernon Oswald; Lowell Ahart 1997-6-24 8645 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  UC53652  Melica fugax M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC972186  Melica fugax Milo S. Baker 1952-4-24 12411 Lassen ca 15 mi e Chester (at old road quarry) Comment
  UCD37478  Melica fugax Beecher Crampton 1960-6-18 5726 Lassen Lassen County, southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 Comment
  CHSC80722  Melica stricta V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10037 Lassen Northeast of Doyle in the Fort Sage Mtns, trail to top of mountain from the end of a 4WD road. 1828 Comment
  UC593538  Melica stricta E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1771 Lassen Red Rock 1280 Comment
  UCR67372  Mentha canadensis George K. Helmkamp 1990-9-23 E- 16 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  JEPS107449  Mentzelia albicaulis Lowell Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  SFV2375  Mentzelia albicaulis I. L. Wiggins, D. B. Wiggins 1961-6-10 16323 Lassen Sierra Nevada Along CA-Highway 36, about 6 miles west of Susanville. 1460 Comment
  CHSC5300  Mentzelia dispersa P. Balch 1955-7-22 Lassen Paul Bunyan Rd., 3 1/2 mi from Susanville toward Eagle Lake. 1889 Comment
  CHSC66392  Mentzelia dispersa Vernon H. Oswald; Lowell Ahart 1996-6-17 7772 Lassen Biz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Scattered plants in dry soil on the edge of the trail on the N side of Hwy. 36 ca. 0.2 mi E of the 7 mile post. 1432 Comment
  JEPS107292  Mentzelia dispersa Lowell Ahart, John Dittes 2005-6-1 11872 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS124810 Image available Mentzelia laevicaulis G. R. Ostrander 1965-7-12 67 Lassen Growing along U.S. 395 15 miles N. of the junction of Calif. 70 and U. S. 395. Comment
  JEPS42757  Mentzelia montana W. L. Jepson 1918-8-2 7773 Lassen Beckwith Pass 1463 Comment
  POM83245  Mentzelia montana Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC429081  Micranthes odontoloma Alice Eastwood 1912-8-22 1861 Lassen Trail from Morgans Springs to Lassen Butte Comment
  CHSC99301  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-22 15036 Lassen About 220 yards west of the road levee, open dry meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  SEINET11601923 Image available Microseris laciniata subsp. laciniata D. W. Taylor 19519 Lassen Pittville; County Road 404 4.5 road miles traveling south therefrom; uncultivated rocky plain southwest of the road bend 1006 Comment
  POM34993  Microseris nutans Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UC1070116  Microseris nutans Robert W. Gardner 1937-6-16 G- 14 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UC1136771  Microseris nutans L. R. Short 1936-6-1 S- 353 Lassen Lassen Forest 1859 Comment
  UC450131  Microseris nutans Franklin P. Nutting Lassen s side Dixie Mt. Comment
  CHSC29930  Microsteris gracilis Robin L. Ondricek 1978-6-20 65 Lassen Callatin Burn, 1.8 mi s of Five Corners. 2011 Comment
Read comments
Jan 31 2011
  RSA122925  Microsteris gracilis subsp. humilis L. R. Short, Wm. Gansberg 1936-6-2 S- 363 Lassen Lassen [National] Forest. MDM, Burgess Spr. Exp. Range 1860 Comment
  RSA74070  Microsteris gracilis subsp. humilis Milo S. Baker 1952-5-23 12414 Lassen Highway 36, east of Chester Comment
  RSA104220  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-18 21757 Lassen Sage brush flat about Lassen County: 8 miles S of Madeline 1280 Comment
  UC1776670 Image available Mimulus arvensis G. Schoolcraft 1994-7-6 2356 Lassen About 2 miles west of Boot Lake 2103 Comment
  UC1609131  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-6-28 5609 Lassen ne Poison Lake (n of Hwy. 44 on Rd. 33N06, nne of Burgess Meadow, sse flank of mtn.); Harvey Mtn. 1798 Comment
  UC1063531  Mimulus breweri A. Simontacchi 1940-5-21 762 Lassen 4.1 mi sse Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET230131 Image available Mimulus densus Noel H. Holmgren, Patricia K. Holmgren 1980-1 9512 Lassen Observation peak, S side of mountain, 18 km (11 mi) airline distance E of Ravendale 2190 Comment
  CHSC5905  Mimulus floribundus M. West 1946-7-1 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CHSC117184  Mimulus guttatus Lowell Ahart; John Dittes 2016-6-7 21009 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UC26977  Mimulus guttatus J. Burtt Davy Jun 17 1897-Jun 24 1897 3400 Lassen Honey Lake Valley Comment
  UC526139  Mimulus guttatus John Thomas Howell 1934-7-9 12518 Lassen Bridge Creek Spring Comment
  CDA41794  Mimulus guttatus T. C. Fuller 1961-5-17 6961 Lassen Hot springs, Wendell. 0 Comment
  HSC20753  Mimulus guttatus M. T. Milligan 1964-7-16 130 Lassen 2 mi. W on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  JEPS23735  Mimulus inflatulus Rimo Bacigalupi with S. Galen Smith 1957-6-28 5989 Lassen 7.0 mi n of Madeline (about 1 mi n of Sage Hen siding on Southern Pacific Railroad, just e of U.S. Highway 395) 1676 Comment
  JEPS23844  Mimulus inflatulus Peter H. Raven with Otto T. Solbrig 1958-6-17 13298 Lassen 4.8 mi s Madeline (along United States Highway 395) Comment
  UC125195  Mimulus layneae Baker and Nutting Lassen Big Valley Comment
  UC699729  Mimulus moniliformis Farris Farris 1936-6-10 Lassen Diamond Mountain 1828 Comment
  CHSC59100  Mimulus moschatus Vernon H. Oswald; Lowell Ahart 1992-8-25 5182 Lassen Lassen Volcanic National Park. Grassy creek near the S end of Snag Lake. 1853 Comment
  HSC22960  Mimulus nanus var. mephiticus John Pratt 1970-7-11 76 Lassen At base of Dyer Mtn lookout tower. Comment
  HSC63954  Mimulus nanus var. mephiticus Teresa Prendusi 1980-7-1 Lassen Champ's Flat 1707 Comment
  POM297719  Mimulus nanus var. mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  RSA715546  Mimulus nanus var. mephiticus L. Ahart, John Dittes 2005-6-1 11869 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC1561980  Mimulus nanus var. mephiticus Barbara Ertter with Gary Schoolcraft 1987-6-16 7197 Lassen saddle on e side Hot Springs Peak (on ne side of lake); Skeedaddle Mountains, Honey Lake 2194 Comment
  JEPS88207  Mimulus pulsiferae Vernon H. Oswald and Lowell Ahart 1996-6-24 7865 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake; Modoc Plateau, Montane Meadow in Yellow Pine Forest. On the W side of the meadow ca. 0.2 mi S of the cabins. 1633 Comment
  RSA536397  Mimulus pygmaeus Beth Corbin, Steve Klukkert 1991-6-11 623 Lassen Harvey Valley, just NNE of Harvey Station. 1690 Comment
  UC1736253  Mimulus suksdorfii Dean W. Taylor 1992-5-7 12547 Lassen Eagle Lake Region, Pine Creek, on Forest Road 33N07 ca. 0.8 mile S of Byrgess Flat, 1767 Comment
  JEPS79150  Mimulus torreyi L. R. Heckard with R. Bacigalupi 1980-6-12 5255 Lassen ne Westwood (near golf course) 1554 Comment
  UC1523779  Minuartia douglasii Gary Schoolcraft 1981-6-9 440 Lassen s Pittville 1249 Comment
  CAS-BOT-BC384031  Mirabilis laevis var. villosa M. Bourell 1997-5-31 5881 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  CAS-BOT-BC221974  Monardella odoratissima subsp. glauca John Thomas Howell 1934-7-8 12487 Lassen Spalding's, Eagle Lake Comment
  CHSC29936  Monardella odoratissima subsp. glauca Robin L. Ondricek 1978-6-27 79 Lassen Pine Creek, sw of the bridge which crosses the creek just upstream (sw) of the California Dept. of Fish and Game's fish milking station. 1566 Comment
  GMDRC6951  Monardella odoratissima subsp. glauca J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31425 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  UCD18952  Monardella odoratissima subsp. glauca Raymond D. Ratliff 1965-8-5 44 Lassen Lassen National Forest, Harvey Valley Allot. (HV 20-14 'area'). 1725 Comment
  UCD125203  Monardella odoratissima subsp. glauca John F. Sorenson 1986-7-5 s.n. Lassen 9 miles southeast of Termo, Bailey Creek drainage; Bailey Creek above Bailey Reservoir. Comment
  CAS-BOT-BC213931  Monardella odoratissima subsp. pallida Ralph K. Gierisch 1968-7-11 3354 Lassen Highway 44, Lassen National Forest 1737 Comment
  CAS-BOT-BC213933  Monardella odoratissima subsp. pallida Clare B. Hardham 1969-8-28 17455 Lassen Slope west of Janesville, Sierra Nevada Comment
  UC124967  Monardella odoratissima subsp. pallida T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  UC506977  Monardella odoratissima subsp. pallida George A. Fischer, Irwin H. Johnson 1933-7-12 F 225 Lassen Lassen Forest 1722 Comment
  CHSC91315  Monolepis nuttalliana Lowell Ahart; John Dittes 2005-6-1 11897 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  UC1136461  Monolepis nuttalliana A. Simontacchi 1940-6-4 810 Lassen 14.8 mi. w. Harvey Mt. Lookout; Lassen Nat'l Forest, Halls Flat Quad. 1783 Comment
  UC1746003  Monolepis nuttalliana Annetta M. Carter 1945-9-30 1721 a Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  UCR244049  Monolepis pusilla Jim Andre 1993-6-1 19719 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CAS-BOT-BC444693  Montia chamissoi Lassen 1927 G. S. Crew 1927-6-25 25 Lassen Lassen National Forest. Norval Flat 2051 Comment
  RSA74361  Montia chamissoi Milo S. Baker 1952-5-23 12421 a Lassen Wet Spot, E of Chester, Hwy 36 Comment
  CAS-BOT-BC444691  Montia chamissoi George W. Gillett 1957-7-28 932 Lassen Lassen Volcanic National Park. One mile above Butte Lake, on Widow Lake Trail. 1905 Comment
  CHSC68758  Montia linearis Vernon H. Oswald; Lowell Ahart 1997-5-27 8497 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. Common in moist gravel on the flood plain of a small creek paralleling the road. 1546 Comment
  NY497780  Montia linearis N. H. Holmgren 1978-6-11 8915 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  RSA122965  Montia linearis L. R. Short, Wm Gansberg 1936-6-8 s 392 Lassen Burgess Spring Exp. Range 1744 Comment
  UC1951065  Montia linearis Debra Valov 2007-5-22 2007075 Lassen Bieber, ca. 12 km east of Hwy 299 via County Rd A2. Comment
  UC1024657  Muhlenbergia andina Leo Whitney 1934-7-24 2195 Lassen near Bridge Creek (ca 7-8 mi sw of Eagle Lake); Lassen National Forest, Bridge Creek Camp 1737 Comment
  UC188911  Muhlenbergia asperifolia Milo S. Baker Lassen Eagle Lake Comment
  CHSC60477  Muhlenbergia filiformis Mary Ann Showers 1992-6-12 2519 Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  UC1024665  Muhlenbergia filiformis Leo Whitney 1934-8-15 2184 Lassen near Bridge Creek (ca 7-8 mi sw of Eagle Lake); Lassen National Forest, Bridge Creek Camp 1737 Comment
  RSA129677  Muhlenbergia richardsonis G. A. Fischer, Irwin Johnson 1933-7-12 F- 196 Lassen Lassen National Forest; Grass Valley. 1695 Comment
  RSA268996  Muhlenbergia richardsonis J. R. Reeder 1972-7-24 5806 Lassen Lassen National Park 1921 Comment
  UC1132396  Muhlenbergia richardsonis Robert W. Gardner 1939-7-10 G- 35 Lassen Grass Valley Halls Flat Quadrangle Comment
  UC506980  Muhlenbergia richardsonis George A. Fischer and Irwin H. Johnson 1933-7-12 F 224 Lassen Stringer Mdw. Lassen National Forest 1722 Comment
  NY492639  Myosurus apetalus K. L. Chambers 1963-5-4 2026 Lassen Highway 395, 10 miles north of junction with Alt. Highway 40 (later renumbered as Highway 70). Comment
  UC1608993  Myosurus apetalus Vernon H. Oswald and Lowell Ahart 1993-5-12 5392 Lassen 0.6 mi e Shasta County Line (n side of Hwy 44, between Old Station and Poison Lake) 1645 Comment
  OBI76991  Myosurus apetalus var. borealis Anthony Baniaga 2011-6-10 325 Lassen Lassen/Modoc County. On the S side of Hwy 299, ca. 1.2 mi E of Lassen County rd 428. 1295 Comment
  CAS-BOT-BC83317  Myosurus minimus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49217 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  UC9325  Myosurus minimus M. S. Baker and Frank Nutting 1894-7-1 Lassen w side Dixey Mts Comment
  CHSC5257  Myriophyllum sibiricum A. Santos 1946-7-12 Lassen Eagle Lake. Pine Creek Slough. 1584 Comment
  JEPS103172  Myriophyllum sibiricum G. Schoolcraft 1996-9-11 2565 Lassen Willow Creek below petroglyphs and above dam 1310 Comment
  UC1101499  Myriophyllum sibiricum Verne Grant and Irving Schneider 1947-7-30 8195 Lassen W end of Tule Lake. Comment
Read comments
Aug 12 2008
  SEINET10969184  Nama densa Mary Susan Taylor 1974-1 Taylor 305 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC735057  Nama densa var. parviflora Lincoln Constance 1946-7-3 3099 Lassen 7 mi n of Spaldings (northern edge of Eagle Lake); northern edge of Eagle Lake 1676 Comment
  SEINET5624608 Image available Nasturtium officinale L. E. Ray 1967-1 29 Lassen ca. 3.5 mi SE ELBS Upper Murrer Meadow 1524 Comment
  CHSC45356  Navarretia breweri Vernon Oswald 1986-5-28 2058 Lassen Hwy 139 between Eagle Lake and Adin, 32.0 mi n of Susanville. 1630 Comment
  CHSC60842  Navarretia breweri Vernon H. Oswald; Lowell Ahart 1993-6-28 5592 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. On the bed of a vernal pool in a meadow. 1719 Comment
  CHSC6207  Navarretia breweri W. Vinyard 1946-6-12 Lassen Eagle Lake. Willow Creek. 1463 Comment
  CHSC64883  Navarretia breweri Vernon H. Oswald; Lowell Ahart 1995-6-19 6885 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.9 mi e of Hwy. 395, on the down-slope approaching Mud Flat. 1353 Comment
  CHSC89734  Navarretia breweri L. P. Janeway 2004-6-26 8143 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18. 1714 Comment
  HSC75910  Navarretia breweri D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19274 Lassen Harvey Valley near Cone Springs Comment
  UC133863  Navarretia breweri Frank Stephens 1894-7-10 Lassen above Pete's Valley 1463 Comment
  UC1537486  Navarretia breweri Gordon H. True Jr. 1936-6-25 541 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  SEINET11268213  Navarretia breweri Vernon H. Oswald, Lowell Ahart 1993-6-28 5592 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake.; 0 1719 Comment
  CHSC14175  Navarretia divaricata K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5806 Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  CHSC6208  Navarretia divaricata W. Vinyard 1946-6-12 Lassen Eagle Lake. Willow Creek. 1371 Comment
  CHSC99105  Navarretia intertexta Lowell Ahart; John Dittes 2008-6-22 15028 Lassen Along a small natural drainage, about 120 yards west of the road levee, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  JEPS121309  Navarretia intertexta subsp. intertexta Lowell Ahart, John Dittes 2013-7-22 18869 Lassen 10 yards S of the man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC23856  Navarretia intertexta subsp. propinqua Glenda Foster 1975-7-12 101 Lassen Along edges of Fall River Mills Road ca. 1 mile n of Highway 44. Comment
  CHSC23861  Navarretia intertexta subsp. propinqua A. W. Harvilik 1967-7-7 38 Lassen Collected on hwy. 139 ca. 6 mi from Susanville. 1463 Comment
  CHSC34347  Navarretia intertexta subsp. propinqua K. R. Stern 1974-6-26 5854 Lassen Ditch bank beside Railroad track, e side of Poison Lake Rd. to Pittville, 1.8 mi nw of intersection with Hwy. 44. Comment
  CHSC58848  Navarretia intertexta subsp. propinqua Vernon H. Oswald; Lowell Ahart 1992-7-16 5111 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. On the bed of the creek on the bed of the reservoir. Blue-flowered plants collected at Long Lake. 1691 Comment
  JEPS114394  Navarretia intertexta subsp. propinqua Lowell Ahart, John Dittes 2008-6-22 15031 Lassen about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber 1262 Comment
  UCD37480  Navarretia intertexta subsp. propinqua Beecher Crampton 1960-6-20 5731 Lassen Lassen County, Lassen National Forest, 0.5 mile south of Black's Mountain USDA and Forest Service Experimental Station, 11 miles northwest of Bogard Ranger Station. 1706 Comment
  UCD32676  Navarretia intertexta subsp. propinqua Beecher Crampton 1954-7-6 2081 Lassen Lassen County, 3 miles north of Madeline, along US highway 395. Comment
  JEPS69637  Navarretia leptalea subsp. leptalea Brown and Wieslander 1922-8-20 86 Lassen Martin Sprs. Eagle Lake Comment
  CHSC113072  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2013-7-22 18852 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS127174  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2016-7-15 21213 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  NY1012788  Navarretia leucocephala subsp. minima N. H. Holmgren 1980-7-3 9470 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 miles) south of Madeline. 1620 Comment
  POM312617  Navarretia leucocephala subsp. minima Malcolm A. Nobs, S. Galen Smith 1949-5-29 756 Lassen Nubieber on Great Northern Railway, Highway 299 Comment
  UC1137584  Navarretia leucocephala subsp. minima A. Simontacchi 1940-6-15 872 Lassen 6.4 mi wnw Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1767 Comment
  UC23714  Navarretia leucocephala subsp. minima M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  UC909096  Navarretia leucocephala subsp. minima G. L. Stebbins Jr. 1949-8-6 4003 a Lassen between Susanville and McArthur (edge of Feather Lake); Feather Lake 1676 Comment
  RSA293374  Navarretia leucocephala subsp. minima Reino Alava 1957-7-5 1143 Lassen Along Highway 395, 10 miles N of Madeline. Comment
  SEINET2440301  Navarretia linearifolia subsp. linearifolia Leigh A. Johnson 2006-7-2 06 -138 Lassen Lassen Nat. Forest, Long Lake vicinity. Off Hwy 44 at mile marker 20.74 (just E of jct between 44 and county road A21). Along shore between trees and water's edge, particularly at point where spur from Hwy 44 connects with road next to lake.; 0 1736 Comment
  POM74669  Navarretia sinistra Marcus E. Jones 1897-6-26 10226 Lassen Susanville, Perkin's Ranch. 1463 Comment
  SEINET14160494  Navarretia sinistra D. W. Taylor 2012-7-18 21281 Lassen Cascade Ranges, Windmill Flat (9tributary Juniper Creek, Pit River watershed, 11 miles S of Adin), Letterbox Hill. 1707 Comment
  UCSB30253  Nemacladus interior Hardham, Clare 1961-6-16 Lassen Gold Run Creek south of Susanville Comment
  SEINET10458443  Nemacladus rigidus Rupert C. Barneby 1943-6-15 Barneby 5765 Lassen Smoke Creek northeast of Viewland 1341 Comment
  UC791038  Nemophila pedunculata Calvin McMillan and Malcolm A. Nobs 1949-6-15 1539 Lassen 5 mi w Nubieber; w of Nubieber Comment
  CHSC65042  Neoholmgrenia andina Vernon H. Oswald; Lowell Ahart 1995-7-5 6959 Lassen Modoc Plateau. North of Honey Lake at Bull Flat on Smoke Creek Ranch Rd., 10.3 mi e of Hwy. 395. At roadside. 1432 Comment
  CAS-BOT-BC349855  Nestotus stenophyllus Alice Eastwood; John Thomas Howell 1940-6-15 8314 Lassen Upper Willow Creek east of Hayden Hill Comment
  CHSC67175  Nestotus stenophyllus James D. Jokerst 1991-5-29 3305 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, top of plateau E of N basin, W of N-S oriented dirt road. 1737 Comment
  CHSC65361  Nicotiana attenuata Vernon H. Oswald; Lowell Ahart 1995-8-14 7182 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. 1645 Comment
  CDA41135  Nicotiana attenuata T. C. Fuller 1962-8-28 9477 Lassen Secret Valley, Highway 395, 3.3 miles north of road to Karlo. 0 Comment
  JEPS94115  Nothocalais troximoides Vernon H. Oswald and Lowell Ahart 1998-5-22 9097 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd., 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  UC1609113  Nothocalais troximoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5504 Lassen Champs Flat Rd. (Lassen A21/105, Forest 32N02) 1.8 mi n Hwy 44 (between Poison Lake and Susanville) 1749 Comment
  CAS-BOT-BC349916  Nothocalais troximoides G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2309 Lassen Crest of range head of Stony Ridge, west of Milford 1930 Comment
  RSA0009448  Nuphar lutea subsp. polysepala Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CAS-BOT-BC171461  Oenothera boothii subsp. alyssoides Louella Bass 1982-6-20 s.n. Lassen Cemetery gate, McKissick Comment
  CHSC12954  Oenothera deltoides subsp. piperi K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5803 Lassen Field on w side of Janesville Rd., ca. 0.1 mi w of turnoff from Hwy. 395, ca. 11 mi se of Susanville. Comment
  UC1122216  Oenothera deltoides subsp. piperi E. Sawyer 1935-6-27 231 Lassen Long Valley Sierraville Quadrangle Comment
  SEINET5345714  Oenothera deltoides var. piperi P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CHSC29904  Onobrychis viciifolia Robin L. Ondricek 1978-6-6 33 Lassen 1.2 mi from Hwy 139 on the road to Eagle Lake Field Station. 1499 Comment
  CAS-BOT-BC349945  Onopordum acanthium O. Havens 1963-8-9 s.n. Lassen P. S. Hall ranch, Doyle Comment
  UC2027324  Oreostemma alpigenum var. andersonii Anthony Baniaga 2011-8-9 491 Lassen Lassen National Forest. About 1/2 mi W of Griffith Hill, S of 30N21. Swain Mountain quadrangle Comment
  CHSC29921  Orobanche corymbosa Robin L. Ondricek 1978-6-27 76 Lassen At Brockman Flat Lava Beds. 1584 Comment
  SEINET10935676  Orobanche uniflora Billy Joe Cox, David B. Dunn 1971-6-2 Cox 2594 Lassen Approx 12 mi s of adin on calif hwy 139, in basalt and clay; along edge of road on Rolling knoll, in artemisia-juniper assoc. 1372 Comment
  CAS-BOT-BC500324  Orobanche uniflora subsp. occidentalis H. C. Cantelow 1941-5-22 s.n. Lassen Fredonyer Pass, 18.5 mi W of Susnville, Hwy 36 Comment
  HSC24668  Orobanche vallicola John Pratt 1970-7-5 64 Lassen 1250 Comment
  RSA516524  Orthocarpus campestris Helen-Mar Wheeler 1952-7-11 s.n. Lassen South of Madeline. Comment
  POM44324  Orthocarpus cuspidatus subsp. copelandii Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  CHSC23505  Orthocarpus cuspidatus subsp. cryptanthus Wayne O. Baum 1970-7-7 70 -2 Lassen Top of Gallatin Peak. 2117 Comment
  CHSC37345  Orthocarpus cuspidatus subsp. cryptanthus J. D. Prouty 1978-6-28 5 Lassen Lower Dry L., SE of Eagle L. 1645 Comment
  UC1537445  Orthocarpus cuspidatus subsp. cryptanthus Gordon H. True Jr. 1936-6-25 526 Lassen e Harvey Ranger Station (Harvey Valley); Harvey Valley 1706 Comment
  SEINET12329637  Orthocarpus hispidus N. H. Holmgren, Holmgren, P. K. 1980-1 9483 Lassen US 395, 7.4 km S of Ravendale 1620 Comment
  RSA39737  Orthocarpus lacerus Philip A. Munz 1947-5-20 11890 Lassen Milford. 1265 Comment
  JEPS98391  Oryzopsis exigua Vernon H. Oswald, G. Schoolcraft, M. Dolan, and B. Corbin 2000-6-18 9929 Lassen E of Ravendale (E-NE of the lookout on Observation Peak) 2377 Comment
  NY404414  Oxytheca dendroidea E. K. Balls 1952-10-10 18140 Lassen 5.5 miles northeast of Litchfield, Highway 395, between Susanville and Alturas 1280.2 Comment
  CAS-BOT-BC413245  Oxytheca dendroidea subsp. dendroidea Robert F. Hoover 1940-10-1 4656 Lassen Janesville Comment
  CHSC63381  Packera cana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6312 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  CAS-BOT-BC316860  Packera eurycephala var. eurycephala Alice Eastwood; John Thomas Howell 1940-6-11 7968 Lassen Eastern Fall River Valley Comment
  CHSC93246  Packera streptanthifolia John Dittes; Scott Chamberlain 2004-6-28 1011 Lassen Modoc Plateau; Long Valley; ca. 2.0 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1448 Comment
  UC1126133  Paeonia brownii A. Simontacchi 1940-5-13 698 Lassen 4.6 mi sw B.M. 7310; Lassen National Forest, Halls Flat Quadrangle, Blacks Mtn. Comment
  UC485769  Paeonia brownii H. E. and S. T. Parks June, 1928 223 Lassen Drakesbad Lassen National Park Comment
  CDA24372  Paeonia brownii T. C. Fuller 1962-6-13 8997 d Lassen 0.5 mile south of Highway 36 to Chester, 2 miles west of Westwood. 0 Comment
  CAS-BOT-BC253718  Panicum capillare John Thomas Howell 1973-7-10 49795 Lassen In city park, Susanville 1295 Comment
  SEINET4691127  Panicum capillare A. Tiehm 1980-1 5759 Lassen Amedee Hot Springs, north end of Honey Lake Valley, 4 air miles SE of Wendel 1220 Comment
  UC1131606  Panicum capillare H. S. Yates 1936-8-11 6073 Lassen Baxter Creek Susanville Quad., Baxter Creek Comment
  CHSC91320  Pectocarya penicillata Lowell Ahart; John Dittes 2005-6-1 11907 Lassen Road edge, on the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  JEPS68204  Pectocarya penicillata W. L. Jepson 1918-8-2 7770 Lassen Beckwith Pass 1463 Comment
  CHSC71077  Pectocarya setosa Vernon H. Oswald; Lowell Ahart 1998-5-22 9098 Lassen Hackstaff Rd. 1.0 mi south of Laver Crossing Rd., 0.2 mi north of Fort Sage Rd., ca. 3 mi north of Doyle. 1316 Comment
  HSC31343  Pectocarya setosa D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19279 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  SD6612  Pedicularis attollens Mrs. R. M. Austin 1882-8-9 Lassen Kings Valley Comment
  CAS-BOT-BC7094  Pedicularis attollens subsp. protogyna Francis Whittier Pennell 1940-6-10 25771 Lassen Route 36 road to Coppervale R.S., E of Westwood Comment
  UCR267420  Pedicularis centranthera Jim Andre, Glenn L. Clifton 1993-6-14 30003 Lassen northeast base of Shaffer Mountain near Secret Creek, c. 20 mi east-northeast of Susanville 1646 Comment
  HSC20935  Pedicularis groenlandica H. E. Parks, S. T. Parks Jun 1928 251 Lassen Lassen National Park, Drakesbad 1677 Comment
  UC41744  Pedicularis groenlandica M. S. Baker and Frank Nutting 1894-7-12 Lassen Comment
  SEINET10549211  Pedicularis semibarbata Mary Merello 1993-6-28 Merello 754 Lassen Lassen National Forest. Along Forest Service Road 33N02 to Harvey Mountain Lookout and Harvey Valley. Open pine scrub and sagebrush woodland. 1740 Comment
  SEINET3836472 Image available Pedicularis semibarbata Marcus E. Jones 1897-6-28 Lassen Diamond Mt. Susanville, Perkin's Ranch 1829 Comment
  CAS-BOT-BC69367  Pellaea breweri T. S. Brandegee 1892-6-29 s.n. Lassen unspecified Comment
  JEPS8094  Penstemon davidsonii var. davidsonii W. L. Jepson 1910-6-11 4117 Lassen Cinder Cone 2133 Comment
  CHSC23498  Penstemon gracilentus Wayne O. Baum 1971-7-7 71 -85 Lassen E. slope of Gallatin Peak. 1981 Comment
  CHSC5912  Penstemon gracilentus R. Gein 1946-6-24 Lassen McCoy Flat. Eagle Lake. 1645 Comment
  CHSC80282  Penstemon gracilentus Jeanne Boze 1981-6-11 103 Lassen About 5 m from road, along Horse Lake Road, 5.5 mi from Hwy 139. 1676 Comment
  NY600715  Penstemon gracilentus B. J. Ertter 1988-7-25 7866 Lassen Ridge of Diamond Mountains ca. 1.5 miles east of Diamond Peak, ca. 10 airmiles due south of Susanville. 2255.5 Comment
  SEINET10917288  Penstemon gracilentus Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 157 Lassen Lassen National Forest. 3.9 miles SW on 32N10 off Hwy. 44. (Turn at rest area). 1900 Comment
  UC1137680  Penstemon gracilentus George A. Fischer, Irwin H. Johnson 1933-7-14 F 254 Lassen Lassen National Forest 1783 Comment
  POM43270  Penstemon miser Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  HSC22984  Penstemon neotericus John Pratt 1970-7-11 69 Lassen Dyer Mtn. 1829 Comment
  CAS-BOT-BC239221  Penstemon newberryi var. berryi Clare B. Hardham 1969-8-28 17449 Lassen West of Janesville Comment
  CAS-BOT-BC383112  Penstemon newberryi var. newberryi Andrew Townesmith; Karen M. Meyer 2007-7-22 843 Lassen Lassen National Forest, Almanor Ranger District. Little Tule Lake, 6.1 miles west county road A21 on county road 110 and Forest Service road 10 1980 Comment
  NY640119  Penstemon procerus var. procerus N. H. Holmgren 1978-6-11 8914 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance 1680 Comment
  CHSC4938  Penstemon roezlii W. Lessig 1967-6-24 5 Lassen 3 mi se Eagle Lake Biology Station, above Murrer's Meadow. 1524 Comment
  NY650104  Penstemon roezlii J. T. Howell 1977-6-22 52402 Lassen North end of Eagle Lake 1585.0 Comment
  NY650137  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen East of Fredonyer Pass 1615.4 Comment
  UC1924562  Penstemon roezlii Debra Valov 2006-5-29 2006034 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1294 Comment
  SEINET226061  Penstemon roezlii M. Lavin 1982-5-30 4122 Lassen E of Hallelujah Junction 22 air mi NW of Reno W side of Petersen Mtns 1676 Comment
  CAS-BOT-BC239511  Penstemon rydbergii var. oreocharis L. Constance 1938-6-10 2322 Lassen 1.5 miles northeast of Robber Creek, near Westwood 1219 Comment
  CHSC13645  Penstemon rydbergii var. oreocharis M. S. Taylor 1974-6-25 287 Lassen Abundant in meadow ca. 2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  JEPS118278  Penstemon rydbergii var. oreocharis Lowell Ahart, John Dittes 2011-6-20 17502 Lassen Meadow, about 40 yards west of the stream, about 50 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  POM252930  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen About 3 miles east of Westwood. Comment
  SBBG7130  Penstemon rydbergii var. oreocharis H. and M. Dearing 1938-7-1 2239 c Lassen 12 mi W of Susanville Comment
  UC506978  Penstemon rydbergii var. oreocharis George A. Fischer and Irwin H. Johnson 1933-7-12 F 228 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1737 Comment
  UC70352  Penstemon rydbergii var. oreocharis Milo S. Baker 1890-1 Lassen Milford Comment
  CHSC13894  Penstemon speciosus L. E. Ray 1967-6-24 33 Lassen Collected ca. 3 mi. se ELBS, above Upper Murrer Meadow. 1524 Comment
  CHSC5916  Penstemon speciosus J. B. Kimsey 1946-6-10 Lassen Eagle Lake. 1554 Comment
  JEPS95972  Penstemon speciosus Vernon H. Oswald and L. Ahart 1999-6-9 9747 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  NY660820  Penstemon speciosus H. D. D. Ripley 1943-6-13 5672 Lassen South of Constantia 1463.0 Comment
  RSA401877  Penstemon speciosus Francis W. Pennell 1940-7-23 26254 Lassen Route 395, 2 mi north of jct with Route 24, northeast of Plumas. 1524 Comment
  SEINET5329894 Image available Penstemon speciosus F. B. Headley 1915-5-28 3 Lassen Honey Lake Comment
  CAS-BOT-BC239661  Penstemon sudans Francis W. Pennell 1940-6-9 25768 Lassen Route 36, west of Susanville 1371 Comment
  CAS-BOT-BC239663  Penstemon sudans Francis W. Pennell 1940-7-23 26253 Lassen Route 36, west of Susanville 1371 Comment
  CAS-BOT-BC243412  Penstemon sudans David D. Keck; J. Clausen 1935-6-25 3756 Lassen Susanville Comment
  JEPS109636  Penstemon sudans Dean W. Taylor 2002-6-21 18167 Lassen Highway 139 about 4 miles North from Lassen College (ca. 5 miles N of Susanville) 1478 Comment
  NY661801  Penstemon sudans D. D. Keck 1930-7-23 948 Lassen Susanville 1280.2 Comment
  UC1583939  Penstemon sudans G. Schoolcraft 1990-8-6 2121 Lassen along Bizz Johnson Trail w Susanville; along Bizz Johnson Trail w of Susanville 1310 Comment
  UC886952  Penstemon sudans A. A. Heller 1938-6-22 15194 Lassen on Highway #36 on a stony slope e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  UC887362  Penstemon sudans Lewis S. Rose 1940-6-15 40594 Lassen 10 mi n Susanville (Round Valley); , n of Susanville 1524 Comment
  SEINET5323638 Image available Penstemon sudans G. Schoolcraft 1998-7-8 2752 Lassen Along Hwy 139 about 3 mi. n. os Susanville. 1402 Comment
  CHSC91292  Perideridia bolanderi Lowell Ahart; John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  JEPS107969  Perideridia bolanderi Lowell Ahart, John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  CHSC29870  Perideridia oregana Robin L. Ondricek 1978-7-15 103 Lassen .6 mi e of jct. with main road to ELFS on road to Murrers Upper Meadow. 1554 Comment
  UC1143014  Perideridia oregana August L. Hormay 1934-7-2 Lassen Headquarters Lassen National Forest (1/2 mi n of Black's Mtn.) 1706 Comment
  CHSC25307  Phacelia adenophora Pauleen Broyles 1977-6-1 154 Lassen Skedaddle Ranch Road at turn-off of South Fork Reservoir road ca 8 cm ne of Herlong. 1660 Comment
  CHSC7682  Phacelia adenophora Beverley J. Wise 1969-5-3 49 Lassen 6.1 mi. junction with Hwy 395 on Las. Co. Rd. 338. 1615 Comment
  JEPS17754  Phacelia adenophora Rimo Bacigalupi with G. T. Robbins 1955-7-21 5429 Lassen along Smoke Creek Ranch rd 8 mi e U.S. Hwy. 395 (se part of valley); Secret Valley 1402 Comment
  RSA17669  Phacelia adenophora Elmer I. Applegate 1934-5-4 8912 Lassen South end of Secret Valley Comment
  RSA38630  Phacelia adenophora P. A. Munz 1947-5-19 11874 Lassen 19 miles south of Ravendale. 1341 Comment
  UC1603542  Phacelia adenophora Arnold Tiem, Margaret Williams, and Jan Nachlinger 1988-6-2 11701 Lassen on hwy 395 3.4 road mi n Wendel road (from Susanville to Alturas, s side of mt., w of hwy); Shaffer Mt. 1386 Comment
  UC726890  Phacelia adenophora A. A. Heller 1938-6-23 15210 Lassen along Hwy 395 about midway between Mapes and Secret Valley 1371 Comment
  UC735114  Phacelia adenophora Lincoln Constance 1946-7-3 3100 Lassen 16 mi w Termo; Grasshopper Valley 1676 Comment
  NY1052542  Phacelia bicolor W. W. Eggleston 1911-5-29 6742 Lassen Vicinity of Doyle Station 1290 Comment
  JEPS94704  Phacelia bicolor var. bicolor Vernon H. Oswald and Lowell Ahart 1998-5-22 9132 Lassen 6 mi ne of Doyle (3.5 mi e of Fort Sage Road, near the summit of the dirt road in the Fort Sage Mountains); Fort Sage Mountains 1737 Comment
  SD61076  Phacelia hastata Darley F. Howe 1964-8-1 3913 Lassen Modoc Natl. Forest. 4.8 mi. on Ridge above Harvey Creek. 2133 Comment
  CDA40427  Phacelia hastata subsp. compacta L. Ahart, J. Dittes 2005-6-2 11950 Lassen Along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, Long Valley, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. Comment
  JEPS107796  Phacelia hastata subsp. compacta Lowell Ahart, John Dittes 2005-6-2 11950 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction 1498 Comment
  RSA716141  Phacelia hastata subsp. compacta L. Ahart, John Dittes 2005-6-2 11950 Lassen Along a poor dirt road, about one mile northeast of the Anderson Ranch home, Long Valley, about five and a half miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. 1499 Comment
  CHSC14192  Phacelia hastata subsp. hastata M. S. Taylor 1974-6-28 274 Lassen Scattered on w shore of Pelican Point in Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  GMDRC6948  Phacelia hastata subsp. hastata J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31421 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  NY1057241  Phacelia heterophylla N. H. Holmgren 1980-7-4 9503 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 Comment
  POM203779  Phacelia heterophylla subsp. virgata J. T. Howell 1934-7-10 12553 Lassen Black s Mt. Comment
  CHSC28594  Phacelia humilis M. S. Taylor 1974-7-9 266 Lassen Scattered ca 3 ft e side of Whitehead Rd, ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  NY1057842  Phacelia humilis P. A. Munz 1947-5-20 11885 Lassen Laufman Forestry Public Camp above Milford 1524 Comment
  SDSU6647  Phacelia humilis D. F. Howe 1964-7-1 3914 Lassen 4.8 miles from Harvey Creek on ridge road, warner Mts. Modoc National Forest. 2134 Comment
  JEPS95000  Phacelia humilis var. humilis Vernon Oswald and Lowell Ahart 1997-6-24 8620 Lassen 2.7 mi e of Lassen National Forest boundary (7.4 mi e of Gold Run Road (29N10), s of Susanville on n side of Diamond Mountain at an impoundment on the edge of Forest Road 29N43); Diamond Mountain, Forest Road 29N43 2036 Comment
  CHSC5263  Phacelia imbricata 1944-7-6 Lassen Eagle Lake. Harvey Valley. 1694 Comment
  POM266183  Phacelia inundata J. T. Howell 1934-7-8 s.n. Lassen Spaldings Resort; Eagle Lake Comment
  CHSC5265  Phacelia linearis J. Wolf 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  JEPS94481  Phacelia linearis Vernon H. Oswald and Lowell Ahart 1997-5-27 8526 Lassen 4.9 mi ne of Highway 139 (Coyote Flat on Forest Route 38N04); Coyote Flat on Forest Route 38N04 1813 Comment
  RSA428037  Phacelia linearis Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  NY1056434  Phacelia lutea var. glandulifera N. H. Holmgren 1980-7-3 9473 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) west of U.S. Higwhay 395 from a turnoff 10.3 km (6.4 mi) south of Madeline 1620 Comment
  UC107462  Phacelia racemosa Mrs. R. M. Austin 1879-1 Lassen Eagle Lake Comment
  CHSC29886  Phacelia ramosissima var. eremophila Robin L. Ondricek 1978-8-2 109 Lassen In moss covered basalt on top of the ridge se of ELFS. 1609 Comment
  SEINET7356303  Phacelia ramosissima var. eremophila Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9508 Lassen Observation Peak, south side of mountain. 18 km (11 mi) airline distance east of Ravendale.; 0 1890 Comment
  RSA722687  Phacelia ramosissima var. ramosissima R. R. Halse 2006-8-3 6990 Lassen Modoc National Forest; along Blue Lake Road north of Blue Lake, ca. 15 miles ESE of Likely. 1860 Comment
  CAS-BOT-BC159229  Phacelia ramosissima var. subglabra John Thomas Howell 1934-6-30 11873 Lassen Janesville Comment
  NY1056748  Phacelia tetramera A. Tiehm 1986-5-12 10349 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  RSA370317  Phacelia tetramera Arnold Tiehm, Margaret J. Williams, Gary Schoolcraft 1986-5-12 10349 Lassen 1 road mile west of the state line on dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341 Comment
  NY1057983  Phacelia thermalis H. D. D. Ripley 1943-6-15 5761 Lassen Along Smoke Creek northeast of Viewland 1311 Comment
  SEINET3091880 Image available Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young. 1984-6-7 8595 Lassen Flats on the Northwest side of Shaffer Mountain, 9 air miles North-northwest of Litchfield. 1372 Comment
  UC1567390  Phacelia thermalis G. Schoolcraft 1989-5-3 1868 Lassen s Karlo; North end of Secret Valley 1341 Comment
  POM266079  Phacelia thermalis C. L. Hitchcock 1940-5-26 6641 Lassen Floodplain of Pitt River, one mile west of Bieber. Comment
  RSA324193  Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young 1984-6-7 8595 Lassen Flats on the northwest side of Shaffer Mountain, 9 air miles north-northwest of Litchfield. 1387 Comment
  UC1037092  Phleum pratense Leo Whitney 1933-7-1 2214 Lassen ca 15 mi w Eagle Lake (Crater Mountain); Lassen National Forest, w of Eagle Lake, Crater Mountain 2225 Comment
  JEPS118284  Phlox douglasii Lowell Ahart, John Dittes 2011-6-20 17506 Lassen About 40 yards north of the dirt road, about 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  RSA0035915  Phlox gracilis Lowell A. Ahart, John Dittes 2008-6-20 14929 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC23546  Phlox hoodii subsp. canescens Wayne O. Baum 1971-6-28 71 -35 Lassen S. slope of Gallatin Peak. 2042 Comment
  OBI77067  Phlox hoodii subsp. canescens Anthony Baniaga 2011-6-7 311 Lassen Lassen NF. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad T32N R7E sec 11 SW of NE 1747 Comment
  RSA647574  Phlox longifolia Marion P. Harthill 1971-6-21 227 Lassen Ravendale Comment
  UC52648  Phlox speciosa subsp. occidentalis M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixie Mts. Comment
  CHSC36482  Phlox stansburyi Margaret E. Halloran 1982-6-4 7 Lassen 3 1/2 mi s of jct of 5.17 and 5.16 on 5.17. Comment
  CHSC36495  Phlox stansburyi Theresa Costa 1982-6-4 31 Lassen Ca. .5 mi e of Murrers Upper Meadow, rd along e edge. Comment
  CHSC64803  Phlox stansburyi Vernon H. Oswald 1995-5-31 6802 Lassen Modoc Plateau. Smoke Creek Rance Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  HSC17069  Phlox stansburyi Fred J. Kindel 1955-6-6 Lassen Doyle Comment
  UC932052  Phlox stansburyi Verne Grant and Alva Grant 1947-5-5 7979 Lassen n of Honey Lake Valley Comment
  CHSC7709  Phoenicaulis cheiranthoides Beverley J. Wise 1969-3-4 34 Lassen 1.5 mi. north of Susanville on Hwy 139. 50 feet w of rd. 1341 Comment
  RSA121476  Phoenicaulis cheiranthoides L. R. Short 1936-4-28 S 335 Lassen Burgess Spring Experimental Range. Lassen Forest. 1738 Comment
  UC1126723  Phoenicaulis cheiranthoides A. Simontacchi 1940-5-17 753 Lassen 1.1 mi ssw of Dixie Spring (Lassen National Forest); Lassen National Forest 1699 Comment
  UC1136913  Phoenicaulis cheiranthoides L. R. Short 1936-4-28 S 335 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1737 Comment
  UC1748284  Phoradendron densum L. P. Janeway, B. Castro, and Loren Gehrung 1999-10-10 6595 A Lassen at Cypress Trailhead into Thousand Lakes Wilderness Area, near Eiler Creek between Fraener Peak and Horse Heaven Buttes High Cascade Range 1639 Comment
  UCD89832  Phragmites australis John Thomas Howell 1975-7-23 51415 Lassen Long Valley Creek bridge on Hwy. 395. Southeast of Constantia. Comment
  UC21954  Phyllodoce breweri M. S. Baker and Frank Nutting 1894-7-20 Lassen Silver Lake Comment
  RSA46500  Pinus jeffreyi Doris K. Kildale 1926-9-11 2797 Lassen [Writing illegible] Susanville Comment
  SEINET12429009  Pinus monophylla var. californiarum D. Charlet, P. Herman 1995-3-6 2192 Lassen Diamond Mountains, 10 kn ESE of Adams Peak; W side Long Valley, NW of Petersen Mtn. on little ridgetop visible from US 395, below railroad above windmill; 1408 Comment
  NY951542  Pinus ponderosa var. ponderosa D. H. Goldman 2004-11-6 2941 Lassen Along the N side of Forest Road 32N08, just N of Pine Creel Valley and about 1.8 miles E of the intersection with Rt. 44. Crater Lake Mountain, Lassen National Forest 1725 Comment
  SEINET3874938  Pinus washoensis David A. Charlet 1994-7-6 1924 Lassen Madelin Mesa foothills above Madeline plains.; 0 1689 Comment
  RSA0011556  Plagiobothrys R. F. Thorne, Larry E. DeBuhr 1975-8-22 46996 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  SJSU8053  Plagiobothrys cognatus R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline Comment
  CHSC93699  Plagiobothrys cusickii Lowell Ahart; John Dittes 2005-6-2 11954 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  CHSC93708  Plagiobothrys cusickii Lowell Ahart; John Dittes 2005-6-1 11906 Lassen Depression on the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  RSA0035913  Plagiobothrys cusickii Lowell A. Ahart, John Dittes 2008-6-20 14914 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC224975  Plagiobothrys hispidulus John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50648 Lassen S and SE of Diamond Mountain 2286 Comment
  CAS-BOT-BC224978  Plagiobothrys hispidulus Philip A. Munz 1947-5-20 11891 Lassen Milford 1264 Comment
  CHSC113067  Plagiobothrys hispidulus Lowell Ahart; John Dittes 2013-7-22 18854 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS109638  Plagiobothrys hispidulus Dean W. Taylor 2002-6-21 18173 Lassen Highway 139 ca. 10 miles N of Susanville, ca. 1 mile south of the southerly end of Willow Creek Valley 1524 Comment
  UC1137645  Plagiobothrys hispidulus A. Simontacchi 1940-5-21 757 Lassen 4.1 mi sse Blacks Mountain; Halls Flat Quad., Lassen National Forest Comment
  UC773949  Plagiobothrys hispidulus L. R. Short and Wm. Gansberg 1936-6-8 S- 389 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1743 Comment
  SD43490  Plagiobothrys hispidulus Philip A. Munz 1947-5-20 11891 Lassen Silty drying roadside pool, Milford. 1264 Comment
  CHSC60727  Plagiobothrys kingii var. harknessii Vernon H. Oswald; Lowell Ahart 1993-6-14 5538 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). On dunes on the N side of the road. 1566 Comment
  CHSC64768  Plagiobothrys leptocladus Vernon H. Oswald 1995-5-24 6780 Lassen Modoc Plateau. 1.8 mi s of Wendel Rd. (Lassen 320) on an unsigned dirt road 0.6 mi e of milepost 19.0, just e of Skedaddle Creek. On the e side of the road ca. 0.2 mi n of the railroad. 1219 Comment
  UC1483869  Plagiobothrys leptocladus G. Schoolcraft 1980-5-7 223 Lassen n shore Honey Lake Island; n shore Honey Lake Island 1219 Comment
  UC614658  Plagiobothrys leptocladus L. Constance 1938-6-11 2330 Lassen slightly alkaline overflow of the Susan River at Litchfield; Susan River, Litchfield 1219 Comment
  UC1191065  Plagiobothrys mollis Robert Ornduff 1959-7-18 5060 Lassen 1 mi e Madeline (on road from Madeline to the Patterson Ranger Station); Modoc National Forest Comment
  UC1533150  Plagiobothrys mollis G. Schoolcraft 1986-7-28 1665 Lassen w Ash Valley (along edge of Moll Reservoir); edge Moll Reservoir 1606 Comment
  CAS-BOT-BC228466  Plagiobothrys mollis Clarence R. Quick 1962-6-17 62 25 B Lassen Swains Hole, S of Blacks Mountain Experimental Station 1554 Comment
  JEPS114692  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2008-6-20 14921 Lassen In vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA0035395  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2008-6-20 14921 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  RSA715627  Plagiobothrys scouleri var. cusickii L. Ahart, John Dittes 2005-6-1 11906 Lassen North side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 mile (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah junction. 1460 Comment
  POM71640  Plagiobothrys scouleri var. hispidulus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  RSA39738  Plagiobothrys scouleri var. hispidulus P. A. Munz 1947-5-20 11891 Lassen Milford. 1265 Comment
  CHSC117287  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2016-7-15 21217 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1261 Comment
  CHSC71079  Plagiobothrys tenellus Vernon H. Oswald; Lowell Ahart 1998-5-22 9093 Lassen Hwy. 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  UC101433  Plagiobothrys tenellus Marcus E. Jones, A. M. 1897-6-18 7141 Lassen Chat 1524 Comment
  SEINET10972868  Plagiobothrys tenellus David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17760 Lassen Approx. 12 mi S of Adin on CA Hwy 139. 1372 Comment
  JEPS103179  Plantago lanceolata G. Schoolcraft 2000-6-5 2897 Lassen Hwy 395 and Johnstonville Road near Susanville Airport 1310 Comment
  CHSC12462  Platanthera leucostachys Robert W. Severin 1969-6-26 21 Lassen 7.2 mi along road from E. L. B. S. to Galatin Beach. 3 mi. s of E. L. B. S. 1645 Comment
  CHSC30564  Platanthera leucostachys Sori H. Shad 1970-6-19 21 Lassen Above and east of Galatin Beach. 1524 Comment
  CHSC6278  Platanthera leucostachys M. West 1946-7-7 Lassen Butte Creek. Comment
  SD7498  Platanthera sparsiflora Mrs. R. M. Austin 1880-1 Lassen No further locality information given on label on specimen sheet. Comment
  CHSC66852  Pleiacanthus spinosus Vernon H. Oswald 1996-10-3 8297 Lassen Modoc Plateau. North of Susanville on Horse Lake Road (Lassen 546) 4.2 mi W of Hwy. 395. On the edge of the road. 1645 Comment
  RSA273386  Poa J. P. Smith, J. O. Sawyer 1971-5-22 4655 Lassen 4 miles west of Susanville on State Route 44. Comment
Read comments
May 9 2012
  UC1031352  Poa Leo Whitney 1935-6-26 3367 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UCD92172  Poa A. A. Beetle 1941-6-28 2815 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  CAS-BOT-BC254945  Poa bulbosa Barbara Shervanick 1974-5-9 1298 Lassen Highway 89 through Lassen National Forest, about 0.25 mile N of Bridge Campground 1371 Comment
  HSC10643  Poa bulbosa D. E. Anderson 1969-7-5 5000 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  RSA295427  Poa bulbosa J. R. Reeder, C. G. Reeder 1981-5-20 7349 Lassen 3.5 km NNW of Janesville. Transition above Long Valley. 1250 Comment
  UCD54537  Poa bulbosa Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2722 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1247 Comment
  UCD90699  Poa bulbosa S. Galen Smith; Malcolm A. Nobs, Herbert L. Mason 1949-5-29 758 Lassen on Great Northern Railroad, Highway 299, Nubeiber. Comment
  RSA300130  Poa compressa J. T. Howell 1974-7-10 50553 Lassen Elysian Valley; Sierra Nevada 1326 Comment
  UCD90920  Poa cusickii Leo Whitney 1935-6-19 3265 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  JEPS70635  Poa cusickii subsp. cusickii G. S. Crew and C. S. Robinson 1927-7-15 61 Lassen sw Lassen Co. Clover Valley; Lassen Forest 1767 Comment
  UC1024815  Poa cusickii subsp. cusickii Leo Whitney 1935-6-19 3264 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest 1722 Comment
  JEPS118453  Poa cusickii subsp. epilis Lowell Ahart, John Dittes 2011-6-20 17507 Lassen Meadow about 40 yards east of the stream, about 100 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CDA2366  Poa pratensis A. A. Beetle 1941-6-28 2797 Lassen 10 miles west of Chester. Comment
  CHSC61599  Poa pratensis Arthur C. Barrett 1915-6-3 18 Lassen Plumas National Forest. Laufman Ranger Station. Meadow. 1463 Comment
  SEINET7850259  Poa pratensis B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11508 Lassen Blue Door Flat, 7 or 8 mi. E of Highway 295, on county road 510. 1774 Comment
  UC1024691  Poa pratensis subsp. pratensis Leo Whitney 1933-8-2 2154 Lassen ca 8 mi nw Eagle Lake (Slate Creek); Lassen Nat'l Forest 1920 Comment
  CAS-BOT-BC255021  Poa secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49521 Lassen Elysian Valley, W of Janesville 1325 Comment
  POM264256  Poa secunda A. A. Beetle 1941-6-28 2794 Lassen 10 mi west of Chester, Rte.36 Comment
  POM267993  Poa secunda D. D. Keck 1944-7-8 5456 Lassen 5 miles east of Westwood, on road to Fredonyer Pass. 1585 Comment
  RSA647530  Poa secunda Marion P. Harthill 1972-6-17 820 Lassen Madeline. 1677 Comment
  SEINET175720 Image available Poa secunda Marcus E. Jones 1897-6-25 Lassen Susanville 1341 Comment
  UCD90323  Poa secunda A. A. Beetle; G. L. Stebbins Jr. 1942-5-29 3367 Lassen 5.2 miles E of Bieber, Big Valley. Comment
  CAS-BOT-BC236254  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5447 Lassen 2 miles E of Westwood, in meadow leading down to Mountain Meadows Reservoir 1524 Comment
  CAS-BOT-BC236256  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5449 Lassen 1.5 miles W of Susanville, on rim of plateau overlooking Susan River Canyon 1341 Comment
  CHSC33318  Poa secunda subsp. juncifolia P. Reynolds 1979-7-4 18 Lassen 3 mi. NE of Wendel, Wendel Canyon in the Skedaddle Mtn. Range. 1371 Comment
  JEPS123838  Poa secunda subsp. juncifolia Lowell Ahart, John Dittes 2015-7-14 20331 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  SJSU15450  Poa secunda subsp. juncifolia John Rawlings, Sara Timby 2014-6-15 1265 Lassen In and around BLM campground at north end of Eagle Lake. 1580 Comment
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Feb 18 2015
  UC1024831  Poa secunda subsp. juncifolia Leo Whitney 1935-6-12 3229 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024949  Poa secunda subsp. juncifolia Leo Whitney 1935-6-27 3317 Lassen ca 13 mi w of n end Eagle Lake; Squaw Valley Comment
  UC1132872  Poa secunda subsp. juncifolia A. Simontacchi 1940-5-13 704 Lassen 2.2 mi n of B. M. 6680 on Cone Mt; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC1153860  Poa secunda subsp. juncifolia Beecher Crampton 1954-7-5 2048 Lassen 4.5 mi w Susanville Comment
  UC699670  Poa secunda subsp. juncifolia Gus Hormay 1944-7-2 Lassen Halls Flat Comment
  UC718011  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5447 Lassen 2 mi w Westwood (meadow leading to Mountain Meadows Reservoir); Sierra Nevada 1524 Comment
  UCD92148  Poa secunda subsp. juncifolia Collector Unknown 1935-6-27 s.n. Lassen Squaw Valley. Comment
  SEINET7854865  Poa secunda subsp. juncifolia G. Schoolcraft 1995-5-22 2489 Lassen East of Skedaddle Ranch. 1554 Comment
  CAS-BOT-BC236182  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49188 Lassen Elysian Valley NW of Janesville 1325 Comment
  HSC10738  Poa secunda subsp. secunda R. S. White 1965-5-15 74 Lassen 10 mi. W of Susanville on Hwy. 36 Comment
  UC1132882  Poa secunda subsp. secunda A. Simontacchi 1940-5-17 747 Lassen 1.1 mi ssw Dixie Spring; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC506987  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 F- 219 Lassen Lassen Nat'l Forest 1722 Comment
  UC70958  Poa secunda subsp. secunda M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixie Valley Comment
  UCD90487  Poa secunda subsp. secunda A. A. Beetle 1941-6-28 2797 Lassen 10 miles W of Chester. 1524 Comment
  UCD90488  Poa secunda subsp. secunda A. A. Beetle 1941-6-28 2797 Lassen 10 miles W of Chester. 1524 Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  UCD91756  Poa wheeleri L. Whitney 1935-6-23 s.n. Lassen Fruit Grower's Supply Co., Camp 10. Comment
  UC73604  Polemonium occidentale Milo S. Baker 1894-1 Lassen Bridge Creek Comment
  CAS-BOT-BC74168  Polyctenium fremontii James Jokerst 1983-5-31 1786 Lassen Grasshopper Valley. 1583 Comment
  CHSC532  Polyctenium fremontii 1944-6-30 Lassen Grasshopper Valley. 1624 Comment
  CAS-BOT-BC74170  Polyctenium fremontii Arnold Tiehm; Margaret Williams; Jan Nachlinger 1988-6-2 11703 Lassen 6.6 road miles north of the Wendel Road on highway 395 from Susanville to Alturas, along the highway. 1347 Comment
  SEINET229584  Polyctenium fremontii Gary Schoolcraft 1984-7-9 1287 Lassen On s. south of Fillman Road 3.8 miles west of Hwy 395. 1609 Comment
  JEPS94355  Polyctenium fremontii var. fremontii Vernon H. Oswald and Lowell Ahart 1997-5-7 8405 Lassen 1.7 ni e of Highway 395 (Mud Flat along Smoke Creek Ranch Road); Mud Flat, Smoke Creek Ranch Road 1356 Comment
  SEINET5326413  Polyctenium williamsiae A. Tiehm, J. Nachlinger, M. J. Williams 1988-1 11703 Lassen On highway 395 from Susanville to Alturas, 6.6 road miles N of the Wendel Road. 1347 Comment
  CHSC117618  Polygala subspinosa L. P. Janeway and B. Castro 2015-6-5 11765 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 7.4 road-km south of Surprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  NY404581  Polygonum amphibium var. emersum G. H. True Jr. 1939-7-6 1038 Lassen George Bailey Ranch, Honey Lake Valley Comment
  UC725581  Polygonum bistortoides A. A. Heller 1938-6-4 15141 Lassen 2 mi w Westwood Comment
  RSA518872  Polygonum davisiae Barbara J. Ertter 1988-7-25 7863 Lassen ridge of Diamond Mts, 1.5 miles E of Diamond Peak, 10 air miles due S of Susanville. 2287 Comment
  CAS-BOT-BC414490  Polygonum douglasii John Thomas Howell 1974-7-10 50562 Lassen Elysian Valley 1325 Comment
  CHSC60384  Polygonum douglasii subsp. douglasii Mary Ann Showers 1992-6-12 2528 Lassen Lassen Volcanic National Park. Meadow enclosed by lava flow, Butte Lake. 1859 Comment
  UC1567355  Polygonum douglasii subsp. majus G. Schoolcraft 1989-6-19 1919 Lassen Ash Valley RNA/ACEC 1554 Comment
  CHSC105243  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  JEPS117589  Polygonum douglasii subsp. spergulariiforme 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1521 Comment
  UC850047  Polygonum douglasii subsp. spergulariiforme M. S. Baker and F. Nutting 1894-1 Lassen Lassen Co. Comment
  UC1924203  Polygonum lapathifolium Debra Valov 2005-8-20 2005221 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  JEPS50618  Polygonum persicaria W. L. Jepson 1939-8-11 19377 Lassen Milford 1280 Comment
  UC1603213  Polygonum polygaloides J. Guardino 1993-5-22 167 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CHSC60844  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald; Lowell Ahart 1993-6-28 5593 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1719 Comment
  HSC69611  Polygonum polygaloides subsp. confertiflorum Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  JEPS96123  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald and Lowell Ahart 1996-6-24 7856 Lassen ca. 0.5 mi e Eagle Lake Rd. (A1) (2.5 mi s of Eagle Lake, ca. 0.3 mi s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  RSA339992  Polygonum polygaloides subsp. confertiflorum Noel Holmgren, Patricia K. Holmgren 1980-7-3 9466 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  UC1520661  Polygonum polygaloides subsp. confertiflorum Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9466 Lassen along US 395 5.6 km (3.5 mi) s Madeline; Madeline Plains 1620 Comment
  CAS-BOT-BC419910  Polygonum polygaloides subsp. kelloggii George W. Gillett 1957-7-28 939 Lassen Lassen Volcanic National Park. Widow Lake. 2072 Comment
  CHSC27120  Polygonum polygaloides subsp. kelloggii Robert A. Schlising 1978-6-29 3297 Lassen E of Eagle Lake; dry creek bed just N of Murrers Meadow and Spring. In area of Pinus jeffreyi forest. 1536 Comment
  CHSC58507  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald 1992-7-3 5047 Lassen Lassen Volcanic National Park. Trail from Juniper L. to Cameron Meadow, between the trail to Jakey L. and the trail to Horseshoe L. 1981 Comment
  CHSC99128  Polygonum polygaloides subsp. kelloggii Lowell Ahart; John Dittes 2008-6-19 14897 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UCD100647  Polygonum ramosissimum Verne Grant; Irving Schneider 1947-8-1 8227 Lassen Southwest into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
  UC506934  Polygonum sawatchense subsp. oblivium George A. Fischer and Irwin H. Johnson 1938-7-14 F 248 Lassen Lassen National Forest 1767 Comment
  CAS-BOT-BC420157  Polygonum sawatchense subsp. sawatchense Clarence R. Quick 1961-6-21 61 -18 Lassen Adjacent to Road 21, Blacks Mountain Expermental [Experimental] Forest, northeast of Lassen Peak 1798 Comment
  CAS-BOT-BC420159  Polygonum sawatchense subsp. sawatchense G. Schoolcraft 1988-6-15 1814 Lassen Ash Valley RNA/ACEC 16 miles east of Adin 1584 Comment
  HSC82252  Polygonum spergulariiforme Thomas W. Nelson, Jane P. Nelson 1980-7-6 6009 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS70696  Polypogon monspeliensis W. L. Jepson 1918-8-2 7771 Lassen Beckwith Pass 1463 Comment
  RSA129377  Polypogon monspeliensis H. S. Yates 1936-8-11 6054 Lassen Near Red Rock. 1341 Comment
  UC1100378  Polypogon monspeliensis Malcolm A. Nobs and S. Galen Smith 1949-8-20 1478 Lassen 1 mi n Doyle (Honey Lake Valley, marshy banks of Long Creek); Honey Lake Valley, banks of Long Creek Comment
  JEPS19802  Porterella carnosula Rimo Bacigalupi with S. Galen Smith 1957-6-29 6023 Lassen along U.S. Highway 395, 3.1 mi s Madeline (Madeline Plains); Madeline Plains 1615 Comment
  SEINET10460825  Porterella carnosula Secrest 1951-6-23 SECREST s.n. Lassen Comment
  SEINET10460829  Porterella carnosula Howell 1934-7-7 Howell 12466 Lassen Near Feather Lake Comment
  SEINET10460831  Porterella carnosula Gillett 1957-7-29 GILLETT 938 Lassen Marsh area near west end of lake, on drying mud flats 2073 Comment
  CHSC4850  Potamogeton R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  RSA772321  Potamogeton diversifolius Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47201 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CAS-BOT-BC267149  Potamogeton foliosus Wm. Anderson 1963-5-12 s.n. Lassen Highrock (between Wendel and Nevada line) Comment
  SEINET4689828  Potamogeton foliosus var. foliosus B. L. Wilson, D. Lytjen 2005-7-28 11482 Lassen Deep creek near confluence with a smaller stream 1359 Comment
  JEPS103228  Potamogeton illinoensis G. Schoolcraft 1996-9-11 2562 Lassen Willow Creek below petroglyphs and above dam 1432 Comment
  OBI77555  Potamogeton natans Anthony Baniaga 2011-7-23 458 Lassen Lassen Natl Forest. Poison Lake. Poison Lake quad. T32N R7E sec 4 1700 Comment
  UCD170231  Potamogeton natans K. M. Meyer; A. Townesmith 2007-7-21 146 Lassen Lassen National Forest. 1.3 mile on Road 10 to Silver Lake off Road 110. 1963 Comment
  JEPS103226  Potamogeton nodosus G. Schoolcraft 1996-9-11 2563 Lassen Willow Creek below petroglyphs above dam 1341 Comment
  RSA323730  Potamogeton pusillus A. Tiehm, Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1699 Comment
  CAS-BOT-BC454029  Potamogeton pusillus subsp. pusillus Arnold Tiehm; Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line 1698 Comment
  CHSC64894  Potentilla basaltica Vernon H. Oswald 1995-6-26 6933 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527) 0.4 mi n of Spooner Rd. in Ash Valley. On the w side of the road adjacent to a flat of low sagebrush. 1542 Comment
  CAS-BOT-BC143111  Potentilla breweri M. S. Baker; Frank Nutting 1894-7-28 s.n. Lassen Bridge Creek Comment
  UC12514  Potentilla breweri M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  CHSC60395  Potentilla flabellifolia Mary Ann Showers 1992-6-13 2553 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  POM34025  Potentilla glandulosa subsp. ashlandica Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UC506995  Potentilla gracilis George A. Fischer and Irwin H. Johnson 1933-7-12 F 208 Lassen Grass Valley Lassen National Forest, Grass Valley 1700 Comment
  CHSC5048  Potentilla gracilis var. fastigiata L. B. Barlow 1967-7-1 80 Lassen 2 mi. west Murrer's Ranch turnoff, 14.9 mi. north of Susanville, Highway 139. 1463 Comment
  NY832928  Potentilla gracilis var. fastigiata B. M. Bartholomew 1988-6-25 4373 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  SEINET6637685  Potentilla gracilis var. fastigiata C. G. Gulling 1905-1 1529 Lassen Big Meadows Comment
  UC1142924  Potentilla gracilis var. fastigiata A. L. Hormay 1941-6-23 11 Lassen Burgess Spring Lassen National Forest 1676 Comment
  CAS-BOT-BC540360  Potentilla gracilis var. fastigiata Marcus E. A M Jones 1897-6-19 s. n. Lassen Chat 1615 Comment
  SBBG3009  Potentilla gracilis var. flabelliformis H. and M. Dearing 1938-7-1 2240 Lassen W of Susanville Comment
  CHSC4758  Potentilla millefolia R. Carter 1967-7-14 614 Lassen Hog Flat Reservoir, between highway 92 and shore of reservoir. Comment
  SJSU5833  Potentilla millefolia J. W. Tilden 1960-6-27 1512 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  UC1128271  Potentilla millefolia A. Simontacchi 1940-5-17 743 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC506926  Potentilla millefolia George A. Fischer and Irwin H. Johnson 1933-7-14 F. 240 Lassen Patterson R.S. Lassen National Forest, Patterson R.S. 1737 Comment
  CAS-BOT-BC158514  Potentilla millefolia G. D. Hanna 1958-9-22 s.n. Lassen Road from Caribou Lake to Cone Lake Comment
  CAS-BOT-BC158516  Potentilla millefolia 1927-6-10 7 Lassen Lassen National Forest, Norval Flat 1747 Comment
  UC1191492  Potentilla rivalis Verne Grant, Irving Schneider 1947-8-1 8236 Lassen e end of Tule Lake Comment
  JEPS126563  Poterium sanguisorba Lowell Ahart, John Dittes 2016-6-7 20998 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  UCD35732  Prunus emarginata Beecher Crampton 1960-6-18 5725 Lassen southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  CAS-BOT-BC154771  Prunus virginiana var. demissa L. B. Barlow 1967-7-1 63 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road 1554 Comment
  CAS-BOT-BC154773  Prunus virginiana var. demissa John Thomas Howell 1974-7-8 50494 Lassen Susanville 1295 Comment
  CHSC6259  Prunus virginiana var. demissa R. Gein 1946-6-11 Lassen Eagle Lake. On Pine Creek. 1580 Comment
  JEPS44919  Prunus virginiana var. demissa W. L. Jepson 1918-8-3 7800 Lassen Honey Lake Valley 1219 Comment
  RSA123193  Prunus virginiana var. demissa L. R. Short, Wm Gansberg 1936-7-3 S- 466 Lassen MDM. Burgess Spr. Exp. Range. 1848 Comment
  UC2013400  Prunus virginiana var. demissa Debra Valov 2011-6-16 1105 Lassen Bieber; off County A2 c. 8 km east of Highway 299. Comment
  CAS-BOT-BC239798  Pseudoroegneria spicata John Thomas Howell 1976-7-20 51999 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  JEPS127720  Pseudoroegneria spicata Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -175 Lassen 171 west from 385 south. After the second tight switchback the population is off the road downslope. Comment
  UCD91511  Pseudoroegneria spicata August L. Hormay 1929-6-1 s.n. Lassen Susanville Forest Office. Comment
  POM112808  Pseudoroegneria spicata subsp. spicata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC718009  Pseudoroegneria spicata subsp. spicata David D. Keck 1944-7-8 5450 Lassen 1.5 mi w of Susanville (overlooking Susan River Canyon); Sierra Nevada 1341 Comment
  CHSC29919  Pseudostellaria jamesiana Robin Ondricek 1978-6-27 73 Lassen On Coleman Lake Rd., 1977 burn area. 1950 Comment
  CHSC67079  Pseudostellaria jamesiana Jeanne Boze 1981-6-13 116 Lassen On northeast slope of Galletin Peak. 1981 Comment
  CHSC68858  Pseudostellaria jamesiana Vernon Oswald; Lowell Ahart 1997-6-24 8619 Lassen South of Susanville on the north side of Diamond Mtn. at an impoundment on the edge of Forest Rd. 29N43, ca. 7.4 miles east of Gold Run Rd. (29N10), ca. 2.7 mi east of Lassen NF boundary. 2036 Comment
  UC1924240  Psilocarphus brevissimus Debra Valov 2004-6-8 2004244 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC64868  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald; Lowell Ahart 1995-6-19 6897 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. 1383 Comment
  JEPS127273  Psilocarphus brevissimus var. brevissimus Lowell Ahart, John Dittes 2016-7-13 21110 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS30616  Psilocarphus brevissimus var. brevissimus Peter H. Raven with Otto T. Solbrig 1958-6-17 13284 Lassen along United States Highway 395 1.9 me s Ravendale Comment
  UC1137705  Psilocarphus brevissimus var. brevissimus A. Simontacchi 1940-6-4 804 Lassen 14.8 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1783 Comment
  JEPS114630  Psilocarphus tenellus var. tenellus Lowell Ahart, John Dittes 2008-6-22 15029 Lassen About 120 yards west of the road levee, on the bottom of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber 1262 Comment
  RSA32005  Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen About 2 miles E of Westwood 1524 Comment
  UC1562803  Pterospora andromedea Barbara Ertter 1987-7-25 7319 Lassen Hwy 44 ca 1 mi E of Shasta Co. line 1645 Comment
  CHSC77267  Puccinellia distans G. Schoolcraft 1993-6-1 2270 Lassen Coyote Spring. 1463 Comment
  RSA0036998  Puccinellia lemmonii Lowell A. Ahart, John Dittes 2008-6-20 14967 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  RSA647519  Puccinellia nuttalliana Marion P. Harthill 1972-6-17 801 Lassen Standish. Comment
  CHSC12464  Purshia tridentata Robert W. Severin 1969-6-20 6 Lassen 1 mile sse of E.L.B.S. 2/3 mile along road up to Five Points. 1630 Comment
  NY848524  Purshia tridentata D. B. Dunn 1971-6-2 17784 Lassen 6 miles north of Hallelujah junction on U.S. Hwy 395 1402 Comment
  SJSU14476  Purshia tridentata W. D. Pitts 1990-5-24 300 Lassen by Hwy 395, 5 mi N of Doyle 1310 Comment
  SEINET7463175  Purshia tridentata F. B. Headley 1905-5-28 s.n. Lassen Honey Lake. Comment
  CHSC118826  Purshia tridentata var. tridentata L. P. Janeway; B. Castro 2015-6-5 11768 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 12.1 road-km south of Surprise Valley Road; 1.8 air-km east of Newland Reservoir/Bare Creek. 1959 Comment
  HSC19580  Purshia tridentata var. tridentata Fred J. Kindel 1955-6-6 Lassen Doyle Comment
  HSC19587  Purshia tridentata var. tridentata J. J. Wagoner 1965-5-1 50 Lassen 22 mi. N of Susanville on Hwy. 395 Comment
  HSC19588  Purshia tridentata var. tridentata K. P. St. John 1965-5-6 26 Lassen 8 mi. S of Ravendale on Hwy. 395 Comment
  JEPS44640  Purshia tridentata var. tridentata Frank W. Peirson 1932-7-20 10355 Lassen 20 mi se Susanville Comment
  RSA152670  Purshia tridentata var. tridentata Dorothy Wiggins 1961-6-10 16321 Lassen Along California Highway 36. ABout 6 miles W of Susanville. Comment
  UC1128540  Purshia tridentata var. tridentata C. W. Hanks 1934-9-26 91 Lassen w side Long Valley (near Plumas National Forest); Sierraville Quad. 1432 Comment
  JEPS28661  Pyrola asarifolia George W. Gillett 1957-7-22 880 Lassen Snag Lake, South shore near Campsite 1850 Comment
  CAS-BOT-BC462880  Pyrola asarifolia Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville, Perkin's Ranch 2133 Comment
  POM39973  Pyrrocoma carthamoides var. cusickii Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  CAS-BOT-BC362263  Pyrrocoma carthamoides var. cusickii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50695 Lassen Steep rocky slope south and southeast of Diamond Mt. 2286 Comment
  UC1037291  Pyrrocoma hirta var. lanulosa Leo Whitney 1934-7-10 1671 Lassen ca 14 mi w Eagle Lake (dry meadow near Harvey Valley Spring); Lassen National forest, Harvey Valley 1737 Comment
  CHSC115058  Pyrrocoma lucida Allison Sanger 2012-7-25 Lassen Lassen National Forest, Eagle Lake Ranger District. Near Road 28N38 just south of junction with Road 28N03, about 1.2 miles east of Mountain Meadows Reservoir. Sec. 31, SE1/4 of NE1/4 and Sec. 32 SW1/4 of NW1/4. 1554 Comment
  CDA18269  Pyrrocoma racemosa var. paniculata G. D. Barbe 1974-8-2 1934 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC5250  Quercus kelloggii P. Balch 1955-7-25 Lassen Eagle Lake. Roop Mt. Rd., 5 mi from Susanville. 1828 Comment
  UC1192295  Quercus kelloggii Verne Grant and Irving Schneider 1947-9-7 8400 Lassen several mi s Janesville (along Highway 395, w of Honey Lake, and along e foot of Sierras) Comment
  CAS-BOT-BC104477  Quercus vacciniifolia C. Hart Merriam 1925-8-22 s.n. Lassen Summit, between Butte Creek Meadows and Lake Almanor Comment
  UC773871  Ranunculus alismifolius var. alismifolius L. R. Short 1936-4-28 S- 339 Lassen Harvey Valley Lassen <National> Forest 1706 Comment
  CHSC71322  Ranunculus alismifolius var. davisii Vernon H. Oswald 1998-6-22 9230 Lassen Champs Flat Rd. (A-21) 1.8 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1749 Comment
  JEPS107311  Ranunculus aquatilis var. aquatilis Lowell Ahart, John Dittes 2005-6-1 11904 Lassen Bottom of a depression, on the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  CAS-BOT-BC334481  Ranunculus aquatilis var. capillaceus R. F. Thorne; Larry E. DeBuhr 1975-8-22 46981 Lassen Along Hwy 395 ca 6 miles N of Madeline and 4.5 miles S of Modoc county line. 1616 Comment
  CHSC8743  Ranunculus aquatilis var. capillaceus S. Chulasmai 1966-5-13 35 Lassen Vernal pool, (Johnstonville). Comment
  UC1101368  Ranunculus aquatilis var. capillaceus Herbert L. Mason and Verne Grant 1947-7-9 13290 Lassen 5 mi e Bieber (irrigation ditch) Comment
  CAS-BOT-BC379025  Ranunculus aquatilis var. diffusus M. S. Taylor 1982-6-12 4647 Lassen aquatic in still pond S side of Hwy 36, N side of west fork Susan River, at jct with Willow Creek Rd., ca. 8 mi W of Susanville Comment
  JEPS77523  Ranunculus aquatilis var. hispidulus L. R. Heckard, T. I. Chuang and R. Bacigalupi 1978-7-20 4893 Lassen junction of Blue Lake turn-off with Likely-Patterson Guard Station road; Warner Mts. 1889 Comment
  CHSC5020  Ranunculus californicus L. G. Bennett 1967-6-24 44 Lassen North end of Murrers Meadow, near Eagle Lake. 1493 Comment
  CHSC6246  Ranunculus canus W. Vinyard 1946-6-13 Lassen Pine Creek, Eagle Lake. 60 Comment
  NY494380  Ranunculus cymbalaria M. A. Nobs 1949-8-20 1484 Lassen Marshy banks of Long Creek, 1 mile north of Doyle, Honey Lake Valley Comment
  RSA0011455  Ranunculus cymbalaria subsp. saximontanus Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46982 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  RSA523410  Ranunculus cymbalaria var. saximontanus Rodney H. True 1936-6-26 544 Lassen Honey Lake Valley- Willow Creek Valley Road. 1524 Comment
  UC1025100  Ranunculus flammula Leo Whitney 1934-8-5 1800 Lassen 16 mi nw Westwood; Lassen National Forest, Caribou Lake 2194 Comment
  UC1191440  Ranunculus flammula Verne Grant and Irving Schneider 1947-8-24 8267 Lassen Blue Lake; nw shore, n Lassen Co. Comment
  CHSC7733  Ranunculus glaberrimus Beverley J. Wise 1969-4-10 87 Lassen 3 mi. south of Susanville on Las. Co. Rd. 204 (Gold Run Road). 1310 Comment
  CHSC61175  Ranunculus glaberrimus var. ellipticus Vernon H. Oswald; Lowell Ahart 1993-5-12 5383 Lassen Forest Rd. 32N08 to Crater Lake, 0.5 mi NE of Hwy. 44, between A21 (to Westwood) and Poison Lake, along Pine Creek. 1737 Comment
  JEPS123841  Ranunculus macounii Lowell Ahart, John Dittes 2015-7-14 20328 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  JEPS60696  Ranunculus occidentalis Frances D. Payne 1929-7-12 99 A Lassen Upper Silver Creek; ne Lassen Co. Comment
  UC1584003  Ranunculus occidentalis G. Schoolcraft 1990-5-15 2050 Lassen about 4 mi s Nubieber; John's Valley 1310 Comment
  UC1924564  Ranunculus occidentalis Debra Valov 2006-5-30 2006036 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UC506988  Ranunculus occidentalis George A. Fischer and Irwin H. Johnson 1933-7-12 213 Lassen Lassen National Forest 1722 Comment
  UC69597  Ranunculus occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3379 Lassen Honey Lake Valley Comment
  UCD96933  Ranunculus occidentalis Jack Major 1966-6-24 s.n. Lassen above Blue Lake, Warner Mountains, Modoc National Forest, northeastern Lassen County (ca. 18 miles airline southeast of Likely). 1905 Comment
  NY494893  Ranunculus sceleratus N. H. Holmgren 1978-6-11 8916 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  CDA3492  Ranunculus testiculatus T. C. Fuller 1969-5-22 18480 Lassen County fairgrounds, Susanville. 0 Comment
  CAS-BOT-BC362886  Ratibida columnifera John Thomas Howell 1974-7-9 50486 Lassen SW. of Wildcat Point, Eagle Lake 1554 Comment
  CHSC7763  Ribes aureum Beverley J. Wise 1969-5-4 98 Lassen North shore of Leavitt Lake, south side Hwy 395. 1266 Comment
  SBBG2740  Ribes aureum H. and M. Dearing 1939-6-6 3563 Lassen Pitt River, Bieber Comment
  CHSC67058  Ribes cereum Willis Ball 1969-6-19 8 Lassen Found approx. 100 yds. N.E. of E.L.B.S. 1615 Comment
  UC1127635  Ribes cereum A. Simontacchi 1940-6-15 882 Lassen 0.4 mi nw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC60742  Ribes cereum var. cereum Vernon H. Oswald; Lowell Ahart 1993-6-3 5487 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), 7.0 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, just S of the ford over Pine Creek, between Poison Lake and Susanville. 1688 Comment
  UC1609464  Ribes cereum var. cereum Vernon H. Oswald and Lowell Ahart 1993-6-3 5487 -5487 Lassen between Poison Lake and Susanville (E side of Champs Flat Rd.(Lassen 105, Forest 32N28Y), 7.0 mi N of its jct. with Lassen 21 (32N02) to Eagle Lake, just S of the ford over Pine Creek) 1688 Comment
  CAS-BOT-BC169007  Ribes hudsonianum L. S. Smith 1918-8-13 1033 Lassen Lost Lake, Silver Creek, Modoc National Forest 2286 Comment
  NY455349  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 miles east of Fredonyer Pass 1706.9 Comment
  CHSC6264  Ribes roezlii L. Harman 1946-6-23 Lassen Eagle Lake. Roop mountain. 2133 Comment
  HSC20330  Ribes roezlii Jim Vaughn 1956-8-5 Lassen Upper Hot Springs Creek, Devils Kitchen area, Mt. Lassen National Park 1829 Comment
  SEINET10482949  Ribes roezlii Mary Susan Taylor 1974-1 Taylor 285 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC106588  Ribes velutinum C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC12424  Ribes velutinum Anne Linda Brisk 1969-6-19 1 Lassen 1/4 mi NE of ELBS. 1554 Comment
  SEINET177615 Image available Ribes velutinum M. E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  RSA0023962  Ribes velutinum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC23568  Ribes viscosissimum W. O. Baum 1971-6-21 32 Lassen E slope on fire trail on Gallatin Peak. 1920 Comment
  UC1523807  Ribes viscosissimum Gary Schoolcraft 1982-8-9 860 Lassen near Susanville; Diamond Mtn. 2011 Comment
  CAS-BOT-BC363012  Rigiopappus leptocladus Doris Kildale Gillespie 1930-5-12 9341 Lassen 2 miles north of Susanville on road to Alturas Comment
  UC1126739  Rorippa curvisiliqua A. Simontacchi 1940-6-4 806 Lassen 14.8 mi w Harvey Mountain Lookout; Halls Flat Quad., Lassen National Forest Comment
  CHSC75479  Rorippa curvisiliqua var. curvisiliqua Vernon H. Oswald; Lowell Ahart 1999-6-9 9758 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass. On a meadow adjacent to the highway. 1645 Comment
  CHSC36472  Rorippa nasturtium-aquaticum Jeffrey R. Peek 1982-6-4 33 Lassen Ca. 50 yds along Willow Creek from its beginning in Murrers Upper Meadow. Comment
  UCD115377  Rorippa sinuata Verne Grant; Irving Schneider 1947-8-1 8226 Lassen Irrigation ditch running southwest into State Fish and Game nesting aera on west end of Section 19 on Madeline Plain. Comment
  CHSC5002  Rosa woodsii subsp. ultramontana K. C. Newman 1967-6-30 27 Lassen Collected ca. 2 mi. NW of ELBS on the other side of the lake in the Merrill Burn area. 1554 Comment
  HSC81474  Rosa woodsii subsp. ultramontana Thomas W. Nelson, Jane P. Nelson 1980-7-6 6019 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir. 1585 Comment
  JEPS45635  Rosa woodsii var. ultramontana W. L. Jepson 1918-8-2 7782 Lassen 1 mi below Boni Ranch (lower bench of creek); Long Valley Creek 1371 Comment
  CAS-BOT-BC148389  Rubus leucodermis Louella Bass 1973-5-29 EV- 53 Lassen Elysian Valley - Sierra Nevada 1325 Comment
  CAS-BOT-BC148391  Rubus leucodermis John Thomas Howell; Gordon H. True 1973-8-1 50248 Lassen Gold Run Creek Road south of Susanville, Diamond Range - Sierra Nevada 1950 Comment
  CHSC23481  Rubus leucodermis Wayne O. Baum 1971-7-5 71 -84 Lassen E. slope of Gallatin Peak. 2072 Comment
  JEPS94540  Rubus parviflorus Vernon Oswald and Lowell Ahart 1997-6-24 8614 Lassen 0.7 mi e of boundary of Lassen National Forest (5.4 mi e of Gold Run Road (29N10), s of Susanville, on n side of Diamond Mountain along Forest Road 29N43); Diamond Mountain along Forest Road 29N43 1889 Comment
  UC1070543  Rumex H. S. Yates 1936-8-11 6057 Lassen near Red Rock; Sierraville Quad. 1341 Comment
  CAS-BOT-BC421955  Rumex acetosella Margaret Williams; Steven Williams 1974-7-26 74 -L-23 Lassen Near Hellelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  SEINET4199964  Rumex crispus M. J. Williams 1974-7-29 74 -L-64 Lassen 2 mi. West of Hallelujah Junction, south of Hwy. 70 Comment
  CHSC76101  Rumex fueginus Lowell Ahart; Vernon H. Oswald 1999-9-13 8214 Lassen On the edge of a flooded canal, just southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  CHSC58851  Rumex occidentalis Vernon H. Oswald; Lowell Ahart 1992-7-16 5122 Lassen Swamp on Bridge Creek, W of the Cinder Pit on the logging road paralleling the E side of the creek, 1.3 mi N of Hwy. 44 and McCoy Flat Reservoir, between Old Station and Susanville. 1719 Comment
  CHSC65317  Rumex occidentalis Vernon H. Oswald 1995-8-21 7210 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. On the marshy edge of the lake. 1859 Comment
  CHSC112393  Rumex salicifolius Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18774 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1036081  Rumex salicifolius var. lacustris Annie M. Alexander and Louise Kellogg 1946-8-11 5154 Lassen nw end Eagle Lake (Sam Webb's Hunting Cabins) Comment
  UC1520656  Rumex salicifolius var. lacustris Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9475 Lassen 0.7 mi w (1.1 km w) U. S. Hwy 395 (a valley road, from a turnoff 6.4 mi (10.3 km) s of Madeline); Madeline Plains 1615 Comment
  UC748281  Rumex salicifolius var. triangulivalvis Annie M. Alexander and Louise Kellogg 1946-8-11 5153 Lassen nw end Grasshopper Valley Comment
  RSA0105589  Rumex triangulivalvis Lowell Ahart, John Dittes 2013-7-22 18867 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS74706  Rumex venosus Wayne Roderick 1969-5-24 Lassen along Hwy 395 near Janesville Comment
  UC1776705  Rumex venosus G. Schoolcraft 1993-6-1 2267 Lassen Along Hwy 395 about 1.5 mi. n. of turnoff to Wendel 1280 Comment
  UCD101656  Rumex venosus R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  JEPS51078  Sagina saginoides Brown and Wieslander 1922-7-30 45 Lassen Eagle Lake, Martin Springs Comment
  UC568  Sagittaria State Geological Survey 1800-1 2189 Lassen Comment
  CHSC5006  Sagittaria cuneata L. G. Bennett 1968-7-8 124 Lassen Murrers Meadow, north end, near Eagle Lake. 1493 Comment
  CAS-BOT-BC445674  Sagittaria cuneata Clarence R. Quick 1964-8-4 64 -102 Lassen Reservoir at Long's cabin between Black's Mt. and Experimental Forest 1783 Comment
  CHSC96721  Salix arctica Gordon Leppig 1998-7-12 938 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CAS-BOT-BC102812  Salix boothii Mrs. H. P. Bracelin 1934-6-14 820 Lassen Upper Silver Creek, near Silver Lake (Lost Lake), Warner Mountains 2316 Comment
  CHSC58514  Salix boothii Vernon H. Oswald 1992-7-3 5048 Lassen Trail from Juniper L. to Snag L., on the W edge of Cameron Meadow. 1950 Comment
  CAS-BOT-BC108056  Salix exigua P. Monnet 1919-7-1 823 Lassen Hot Springs Peak 91 Comment
  UC481924  Salix exigua var. hindsiana Mrs. H. P. Bracelin 1931-6-29 485 Lassen at edge of Pit River McArthur 960 Comment
  JEPS107798  Salix jepsonii Lowell Ahart, John Dittes 2005-6-2 11947 Lassen Long Valley, along a small stream, about 1 1/2 miles (air) northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  CAS-BOT-BC128225  Salix lasiandra subsp. caudata James Vale; Keith Wagnon; Walter Knight; Irja Knight 1981-5-24 4121 Lassen Willow Creek Campground on road between Adin and Said Valley Reservoir Comment
  CAS-BOT-BC128171  Salix lasiandra var. lasiandra John Thomas Howell; Gordon H. True 1973-7-31 50042 Lassen On road from Janesville to Thompson Peak, Diamond Range - Sierra Nevada 1783 Comment
  CAS-BOT-BC128173  Salix lasiandra var. lasiandra Hans Leschke 1960-8-8 1736 Lassen Below trail ski hut, Crumbaugh Lake 1981 Comment
  JEPS88212  Salix lasiandra var. lasiandra Vernon H. Oswald and Lowell Ahart 1996-6-17 7790 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau 1402 Comment
  RSA746513  Salix lasiolepis K. M. Meyer, A. Townesmith 2007-7-19 138 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  CHSC60767  Salix lemmonii Vernon H. Oswald; Lowell Ahart 1993-6-3 5489 Lassen Bridge Creek Spring Rd. (Lassen 112, Forest 31N06), at Bridge Creek, N of Hwy 44 between Poison Lake and Susanville. 1746 Comment
  POM362823  Salix lemmonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 684 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  CHSC93562  Salix lucida subsp. lasiandra Lowell Ahart; John Dittes 2005-6-2 11925 Lassen Long Valley, along a small ditch, along the road, near the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  SEINET11987291  Salix lutea J. Vale, Wagnon, K.; Knight, W.; Knight, I. 1981-1 4121 Lassen Willow Creek Campground on road between adin and Said Valley Reservoir Comment
  CAS-BOT-BC129525  Salix melanopsis G. Schoolcraft 1999-7-6 2853 Lassen Along Susan River near Devil's Corral Trailhead 1402 Comment
  UCR67403  Salsola gobicola George K. Helmkamp 1990-9-23 B- 16 -90 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  JEPS95904  Salsola tragus Lowell Ahart and Vernon H. Oswald 1999-9-13 8205 Lassen on the east side of the dirt road and 1/2 mile south of the sign in station; Honey Lake Wildlife Area; 4 1/2 miles (air) southeast of Standish 1207 Comment
  UC1136482  Salsola tragus E. Sawyer 1935-6-27 218 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UCD125446  Salvia aethiopis Collector Unknown 1950-1 s.n. Lassen Susanville. Comment
  CDA19717  Salvia dorrii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat. 0 Comment
  CHSC42206  Salvia dorrii C. E. Laver 1985-6-1 Lassen Ca. 5.5 mi ne of Litchfield and 5 mi nw of Wendel. 1371 Comment
  HSC31743  Salvia dorrii Donald Spalinger 1974-5-16 67 Lassen Near Hwy. leading from Wendel to Flanigan 1280 Comment
  SEINET13947383 Image available Salvia dorrii Arthur Cronquist, Arthur H. Holmgren 1959-1 8462 Lassen 50 mi SE of Susanville Comment
  CAS-BOT-BC214310  Salvia dorrii var. pilosa H. D. Ripley; R. C. Barneby 1944-5-30 5966 Lassen Secret Valley 1524 Comment
  CHSC12422  Sambucus mexicana Anne Linda Brisk 1969-6-26 28 Lassen 7.2 mi SW of ELBS on Road 4.25. 1584 Comment
  CHSC60277  Sambucus mexicana P. V. Caldwell 1972-6-23 247 Lassen Irrigation ditch at headwaters of Willow Creek, Upper Murer's Meadow, on the bank. Comment
  UCD127944  Sanicula bipinnatifida W. W. Robbins 1926-4-17 534 Lassen Grass Valley. Comment
  OBI75902  Sanicula graveolens Anthony Baniaga 2011-8-1 475 Lassen Lassen Natl Forest. NW Swain Meadow. Swain Mtn qud T30N R8E sec 27 SE of NW 1768 Comment
  UC1409833  Sanicula tuberosa K. Morris, Dunn and Conrad 1973-5-25 242 Lassen 7.6 mi nw of Junction of Hwy 36 and 44 on Highway 44 Highway 44 Comment
  UC1598734  Sanicula tuberosa M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CDA23525  Sarcobatus vermiculatus M. R. Pryor 1953-9-22 Lassen 0.5 mile west of Jack Crow s property, Stacey. 0 Comment
  NY540264  Sarcobatus vermiculatus E. K. Balls 1952-10-10 18136 Lassen 5.2 miles west of Standish, Highway 395, Susanville to Alturas 1249.7 Comment
  UC768791  Sarcobatus vermiculatus R. F. Hoover 1940-9-28 4637 Lassen Leavitt Comment
  CAS-BOT-BC466201  Sarcodes sanguinea Peter H. Raven; Otto T. Solbrig 1958-6-16 13254 Lassen Along State Hwy 36, 0.3 mi E of summit of Fredonyer Pass Comment
  CAS-BOT-BC466321  Sarcodes sanguinea John Thomas Howell 1973-7-10 49786 Lassen Sierra Nevada, Fredonyer Pass 1737 Comment
  UC1037239  Saxifraga aprica Leo Whitney 1935-6-11 3227 Lassen Camp 10, Fruit Grower's Supply Company Camp 10; Lassen National Forest, Fruit Grower's Supply Company Comment
  UC1127669  Saxifraga nidifica var. nidifica A. Simontacchi 1940-5-14 726 Lassen 4.1 mi wnw of Aspen Well (Lassen National Forest); Lassen National Forest 1767 Comment
  UC1142964  Schoenoplectus acutus var. acutus A. L. Hormay 1941-6-17 23 Lassen meadow lake near Westwood; Lassen National Forest, meadow lake near Westwood 1615 Comment
  RSA0009705  Schoenoplectus acutus var. occidentalis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  POM111523  Schoenoplectus fluviatilis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  JEPS63798  Scirpus acutus var. occidentalis W. L. Jepson 1918-8-2 7786 Lassen 1 mi below Boni Ranch house (on lower bench of Long Valley Creek, Long Valley); Long Valley, Long Valley Creek below Boni Ranch house 1371 Comment
  SEINET10751251  Scirpus acutus var. occidentalis Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 842 Lassen Lassen National Forest, Almanor Ranger District. Little Tule Lake, 6.1 miles west county road A21 on county road 110 and Forest Service road 10. T31N R7E S35 NW 1/4. 1980 Comment
  UC1100760  Scirpus acutus var. occidentalis Verne Grant and Irving Schneider 1947-8-24 8270 Lassen nw shore Blue Lake (northern Lassen County); nw shore Blue Lake Comment
  CHSC66415  Scirpus microcarpus Vernon H. Oswald; Lowell Ahart 1996-6-17 7819 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau. In a marshy pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  JEPS11413  Scrophularia desertorum R. F. Hoover 1940-9-28 4632 Lassen Susanville Comment
  UC1713590  Scutellaria holmgreniorum G. Schoolcraft 1986-6-18 1630 Lassen s side of Smoke Creek (between Shinn and Smoke Creek ranches) 1493 Comment
  SEINET3861523  Scutellaria holmgreniorum Noel H. Holmgren, Patricia K. Holmgren 1980-7-5 9524 Lassen Upper Smoke Creek drainage, 21.9 km (13.6 mi) from U.S. Hwy-395 via Rye Patch Canyon, 24 km (15 mi) airline distance SE of Ravendale.; 0 1585 Comment
  CAS-BOT-BC214261  Scutellaria nana G. Schoolcraft 1999-7-7 2855 Lassen N. end of Eagle Lake just ne. of Eagle Lake Campground 1584 Comment
  CAS-BOT-BC214263  Scutellaria nana H. D. Ripley; R. C. Barneby 1943-6-15 5764 Lassen Smoke Creek, N-E of Viewland 1341 Comment
  POM252832  Scutellaria nana A. A. Heller 1938-6-23 15186 Lassen 1 mile south of Westwood. 1524 Comment
  UC1137775  Scutellaria nana August L. Hormay 1934-7-2 Lassen 1/4 mi nw of Black's Mountain; Lassen National Forest 1706 Comment
  UC1609093  Scutellaria nana Vernon H. Oswald and Lowell Ahart 1993-7-8 5653 Lassen on se edge of Poison Lake (Pittville Rd. (Lassen 111, 36N01) 1.9 mi n of Hwy 44) 1709 Comment
  UC1184060  Senecio aronicoides Jean Langenheim 1957-6-26 4372 Lassen ne part Said Valley Comment
  JEPS109870  Senecio hydrophiloides Dean W. Taylor 2007-6-14 20129 Lassen between Gordon Lake and Bullard Lake, along Forest Road 31N31 0.3 miles NE of junction with Forest Road 34N25 (this the junction at the northwest end of Gordon Lake) 1828 Comment
  JEPS87532  Senecio hydrophiloides Vernon H. Oswald and Lowell Ahart 1993-6-28 5600 Lassen Rd 35N04 at Aspen Well (n of Hwy 44 on nw edge of valley, ne of Poison Lake); Harvey Valley 1725 Comment
  HSC28835  Senecio integerrimus D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19263 Lassen In Harvey Valley near Cone Springs Comment
  CAS-BOT-BC363856  Senecio integerrimus var. exaltatus Doris Kildale Gillespie 1930-5-13 9388 Lassen Between Susanville and Janesville Comment
  CHSC92824  Senecio integerrimus var. exaltatus Lowell Ahart; John Dittes 2005-6-1 11861 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  UC1063253  Senecio integerrimus var. exaltatus A. Simontacchi 1940-5-15 712 Lassen 10.2 mi e Coyote Spring; Lassen National Forest, Halls Flat Quad. 1699 Comment
  RSA0124944  Senecio integerrimus var. exaltatus E. K. Balls 1950-5-19 14 .772 Lassen Above Ash Creek Public Camp, off rd. from Adin to Madeline. 1616 Comment
  SJSU13986  Senecio integerrimus var. exaltatus N. A. Hopkins 1988-5-16 1399 Lassen by Scott Valley Rd W of Long Valley Cr 4 mi N of Hwy 70 1524 Comment
  CAS-BOT-BC364253  Senecio triangularis B. C. Cain 1925-8-24 108 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  CHSC76260  Sesuvium verrucosum Lowell Ahart; Vernon H. Oswald 1999-9-13 8217 Lassen Field about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  CHSC105238  Sidalcea glaucescens Lowell Ahart; John Dittes 2010-7-31 17016 Lassen On the south side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  CAS-BOT-BC205776  Sidalcea oregana David D. Keck; J. Clausen 1935-6-24 3740 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC27642  Sidalcea oregana George Deniso 1978-7-21 88 Lassen Colman L., W shore, SE of Eagle L. 1962 Comment
  UC579721  Sidalcea oregana subsp. oregana David D. Keck and J. Clausen 1935-6-24 3740 Lassen 2 mi s Ravendale; s of Ravendale 1464 Comment
  POM260184  Sidalcea oregana subsp. oregana C. L. Hitchcock 1940-5-26 6643 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  UC1537657  Sidalcea oregana subsp. oregana Gordon H. True Jr. 1937-7-10 789 Lassen rocky mesa near Skeedaddle; near Skeedaddle 1493 Comment
  UC1553380  Sidalcea oregana subsp. spicata G. Schoolcraft 1988-7-7 1820 Lassen at Painter Creek and Horne Ranch Rd. crossing 1645 Comment
  NY54618  Sidalcea oregana var. maxima N. H. Holmgren 1980-7-3 9479 Lassen Madeline Plains, Westside Road, 9 km (5.6 mi) west of U.S. highway 395, 16 km (10 mi) airline distance northwest of Termo 1620 Comment
  NY746728  Sidalcea oregana var. maxima A. Tiehm 1988-6-2 11704 Lassen East side of Snowshoe [Snowstorm?] Mountain, 18.1 road miles north of the Wendel road on highway 395 from Susanville to Alturas, west side of the highway 1402 Comment
  SBBG71651  Silene bernardina S. W. Hutchinson -Jun-1925 72 Lassen near Eagle Lake 1554 Comment
  CAS-BOT-BC384309  Silene bernardina George W. Gillett 1957-7-28 928 Lassen Lassen Volcanic National Park. On trail to Widow Lake above junction with Snag Lake Trail at upper end of Butte Lake 1859 Comment
  CAS-BOT-BC136279  Silene douglasii A. G. Brennels 1928-7-3 7 Lassen Lassen Forest, Jesson Valley 1463 Comment
  SD113389  Silene douglasii Darley F. Howe 1964-8-2 3917 Lassen East Creek, Warner Mountains, Modoc National Forest. 2010 Comment
  UC8440  Silene douglasii M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Comment
  CAS-BOT-BC389264  Silene lemmonii Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville. Perkin's Ranch 2133 Comment
  OBI75896  Silene menziesii Anthony Baniaga 2011-8-17 507 Lassen Lassen Natl Forset. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E SW of SW 1896 Comment
  SEINET8223955  Silene menziesii Richard R. Halse 2006-8-3 6992 Lassen Modoc National Forest; along Blue Lake Road north of Blue Lake, ca. 15 miles ESE of Likely. 1860 Comment
  RSA722689  Silene menziesii subsp. menziesii R. R. Halse 2006-8-3 6992 Lassen Modoc National Forest; along Blue Lake Road north of Blue Lake, ca. 15 miles ESE of Likely. 1860 Comment
  JEPS123843  Silene nuda Lowell Ahart, John Dittes 2015-7-14 20334 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  JEPS50953  Silene nuda W. L. Jepson 1918-8-3 7802 Lassen near Buntingville (at Raker Ranch, Honey Lake Valley); Honey Lake Valley, at Raker Ranch 1219 Comment
  CAS-BOT-BC389548  Silene nuda David D. Keck 1944-7-8 5446 Lassen Sierra Nevada. 2 mi. E. of Westwood, meadow leading to Mountain Meadows Reservoir 1524 Comment
  CHSC106672  Sisymbrium altissimum B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  RSA152595  Sisymbrium altissimum I. L. Wiggins, Dorothy Wiggins 1961-6-11 16333 Lassen 13.5 miles E of Susanville. Comment
  CHSC64775  Sisymbrium orientale Vernon H. Oswald 1995-5-31 6803 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1371 Comment
  JEPS88552  Sisyrinchium bellum Vernon H. Oswald and Lowell Ahart 1996-6-24 7875 .1 Lassen ca 0.5 mi e Eagle Lake Rd. (A1) (and 2.5 mi s of Eagle Lake, in meadow bordering Papoose Creek where it leaves the n end of the meadow); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  CDA38565  Sium F. A. Taylor 1939-7-5 s.n. Lassen Bieber. 0 Comment
  POM82470  Sium suave Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  NY821295  Solanum physalifolium J. T. Howell 1973-8-1 50146 -A Lassen Near Susanville, Diamond Range 1585 Comment
  CHSC106203  Solanum physalifolium var. nitidibaccatum Lowell Ahart; John Dittes 2010-8-31 17138 Lassen On the east side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. 1276 Comment
  POM203787  Solanum triflorum J. T. Howell 1934-6-10 11858 Lassen 3 miles N of Omira. Comment
  RSA0086585  Solanum xanti Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  CAS-BOT-BC365367  Solidago elongata L. S. Smith 1918-8-11 1022 Lassen Modoc National Forest. Camp One Comment
  CAS-BOT-BC365369  Solidago elongata B. C. Cain 1925-8-24 78 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  CHSC59081  Solidago elongata Vernon H. Oswald; Lowell Ahart 1992-8-25 5177 Lassen Lassen Volcanic National Park. Cameron Meadow between Juniper and Snag Lakes. Edge of meadow. 1950 Comment
  JEPS32384  Solidago spectabilis W. L. Jepson 1918-8-4 7812 Lassen Horse Lake 1554 Comment
  JEPS97325  Solidago velutina subsp. californica Vernon H. Oswald 1995-8-21 7207 Lassen T38N R15E NE1/4 Sec. 20, 6100 ft, Warner Mtns., Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  JEPS121251  Sonchus asper Lowell Ahart 2013-7-22 18846 Lassen W margin of duck field, about 50 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CAS-BOT-BC158899  Sorbus scopulina John Thomas Howell; Gordon H. True 1973-8-1 50151 Lassen Gold Run Creek Road south of Susanville, Diamond Range - Sierra Nevada 1584 Comment
  CHSC64792  Sphaeralcea grossulariifolia subsp. grossulariifolia Vernon H. Oswald 1995-6-7 6837 Lassen Modoc Plateau. Rocky ridge on the n side of Wendel Rd. (Lassen 320) at milepost 11.0, 5.6 mi east of Wendel, ne of Susanville. 1261 Comment
  UC2042785  Sphaeromeria cana Barbara Ertter with Gary Schoolcraft 1987-6-16 7192 Lassen Skeedaddle Mountains on NE side of Honey Lake, on S side of Hot Springs. Comment
  CHSC93240  Sphaeromeria potentilloides var. potentilloides John Dittes; Scott Chamberlain 2004-6-28 1013 Lassen Modoc Plateau; Long Valley; ca. 2.2 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-miles east of Plumas County line; meadow. 1445 Comment
  UCD136228  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 2000-6-19 2905 Lassen Flat southeast of Ravendale BLM Fire Station. 1645 Comment
  UC21374  Sphenosciadium capitellatum M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  POM82495  Sphenosciadium capitellatum Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  SEINET7977004  Stachys rigida C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  HSC26818  Stanleya elata D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19286 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  CAS-BOT-BC391078  Stellaria longipes subsp. longipes Louella Bass 1973-5-29 87 Lassen Elysian Valley 1325 Comment
  CHSC5211  Stenotus acaulis J. B. Kimsey 1946-6-17 Lassen Mt. Fredonyer. 2377 Comment
  UC86569  Stenotus acaulis T. S. Brandegee 1892-7-2 Lassen Near Susanville Comment
  CDA19745  Stenotus stenophyllus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Eagle Lake. 0 Comment
  RSA252459  Stephanomeria exigua subsp. coronaria R. F. Thorne, C. W. Tilforth 1969-9-6 39261 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  UC1037278  Stephanomeria lactucina Leo Whitney 1934-7-22 1747 Lassen 6 mi w Eagle Lake, lower end (near Antelope Mountain); Lassen National Forest 1889 Comment
  JEPS28674  Stephanomeria tenuifolia George W. Gillett 1957-7-26 901 Lassen Butte Lake, point of rocks w of outlet an above trail Lassen Volcanic National Park 1844 Comment
  CAS-BOT-BC375742  Stephanomeria virgata Gary Schoolcraft 1985-9-4 1520 Lassen Along Hwy 395 above Pauline's Risser, Tule Patch Spr. 1524 Comment
  SEINET8061783  Stipa comata var. comata P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  UC1140903  Stipa exigua L. D. Whitney 1935-6-16 3272 Lassen base Crater Mt. Comment
  UCD51436  Stipa thurberiana A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3362 Lassen 10 miles NE of McArthur. Comment
  SEINET10523055  Stipa thurberiana Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2873 Lassen Hallelujah Jct. intersection of US Hwy 395 & Calif. Hwy 70; in open waste area adjacent to Artemisia tridentata community. 1433 Comment
  SEINET10966883  Stipa thurberiana Paul Gallian, David B. Dunn 1971-6-2 Gallian 513 Lassen 6 mi. N. of Hallelujah jct. on U.S. Hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash 1402 Comment
  CHSC27669  Swertia albicaulis var. nitida Robert A. Schlising 1978-7-9 3312 Lassen S of Eagle Lake; forested area between Papoose Meadows and Eagle Lake Road. Comment
  RSA18164  Symphoricarpos acutus C. B. Wolf 1929-9-1 3781 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  CAS-BOT-BC269700  Symphoricarpos mollis Louella Bass 1973-6-23 132 Lassen Elysian Valley 1325 Comment
  CHSC67077  Symphoricarpos rotundifolius var. rotundifolius Jeanne Boze 1981-6-12 120 Lassen 1/4 mi. south of Eagle Lake Field Station. 1615 Comment
  UCR18738  Symphoricarpos vaccinioides Frank C. Vasek 1975-7-11 750711- 26 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  CHSC52664  Symphyotrichum campestre James D. Jokerst 1983-7-24 1885 Lassen Near Madeline Plains. 1614 Comment
  JEPS95902  Symphyotrichum frondosum Lowell Ahart and Vernon H. Oswald 1999-9-13 8210 Lassen just S of the parking area, about 1 mi S of the sign in station, Honey Lake Wildlife Area, 5 1/2 mi (air) SE of Standish 1207 Comment
  UC1192071  Symphyotrichum frondosum Verne Grant and Irving Schneider 1947-9-5 8375 Lassen northwest shore of Eagle Lake by Sam Webb's place Comment
  CAS-BOT-BC98542  Symphyotrichum spathulatum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49450 Lassen Elysian Valley, west of Janesville - Sierra Nevada 1325 Comment
  JEPS40821  Symphyotrichum spathulatum Brown and Wieslander 1922-7-30 66 Lassen Martin Sprs, Eagle Lake Eagle Lake Comment
  UC1924205  Symphyotrichum spathulatum Debra Valov 2005-8-20 2005219 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  SFV7757  Symphyotrichum spathulatum T. Gordon, K. Kimbrough 1975-8-15 1211 Lassen 16 miles south of Adin. 1402 Comment
  CAS-BOT-BC221914  Taeniatherum caput-medusae John Thomas Howell 1976-7-19 51956 Lassen On Gold Run Creek southwest of Susanville 1356 Comment
  CAS-BOT-BC221916  Taeniatherum caput-medusae Lee E. Wheeler 1960-6-15 s.n. Lassen Ca 4 mi SE/Susanville Comment
  CHSC71103  Tamarix parviflora Vernon H Oswald; Lowell Ahart 1998-5-22 9096 Lassen Hwy 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  CHSC117508  Taraxacum officinale Lowell Ahart; John Dittes 2016-7-13 21112 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at southern slope of Big Valley. 1289 Comment
  JEPS118448  Taraxacum officinale Lowell Ahart, John Dittes 2011-6-20 17490 Lassen About 30 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CHSC60755  Taraxia subacaulis Vernon H. Oswald; Lowell Ahart 1993-6-3 5479 Lassen Champs Flat Rd. (Lassen 21/1.5, Forest 32N02), 4.0 mi N of Hwy 44, 0.3 mi NE of spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. In a meadow. 1731 Comment
  JEPS31732  Taraxia tanacetifolia C. S. Robinson 1927-6-25 38 Lassen near Westwood Jct. (sw Lassen Co.); Lassen <National> Forest, Norval Flat 2051 Comment
  UC128751  Taraxia tanacetifolia Milo S. Baker Lassen near Eagle Lake Comment
  CDA18275  Tetradymia canescens G. D. Barbe 1974-8-2 1941 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  JEPS17732  Tetradymia canescens Rimo Bacigalupi with G. T. Robbins 1955-7-21 5421 Lassen 16.3 mi e U. S. 395 (and 2.5 w of Calif-Nevada State line, tributary of Rush Creek (head of Smoke Creek drainage)); Rush Creek, Smoke Creek 1389 Comment
  SEINET3391043 Image available Tetradymia canescens Lewis S. Rose 1934-7-23 34409 Lassen Reno Junction. 1372 Comment
  RSA94945  Tetradymia canescens F. W. Peirson 1932-7-20 10354 Lassen 20 miles S of Susanville. Comment
  CAS-BOT-BC340063  Tetradymia glabrata P. Monnet 1913-7-1 801 a Lassen Hot Springs Peak 1828 Comment
  CHSC110308  Tetradymia glabrata L. P. Janeway; B. Castro 2012-7-2 10928 Lassen Modoc Plateau. Eastern end of Amedee Mountains; along Ske-daddle Ranch Road (#26020) at the road to South Fork Reservoir, 6.1 road km north of the Wendel Road. 1473 Comment
  CHSC33334  Tetradymia glabrata Hank Thompson 1980-4-14 20 Lassen Ca. 24 mi E of Susanville. 1402 Comment
  CHSC31075  Tetradymia spinosa J. S. White 1980-4-14 117 Lassen 1 mi ne of Wendel. 1295 Comment
  UC36632  Tetradymia spinosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3341 Lassen Honey Lake Valley Comment
  UCR244047  Tetradymia spinosa Jim Andre 1993-6-1 19717 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CAS-BOT-BC88053  Thelypodium crispum John Thomas Howell 1934-6-10 11859 Lassen 3 miles north of Omira. Comment
  CAS-BOT-BC88079  Thelypodium flexuosum Ethel S. Willits 1940-4-28 198 Lassen In Lassen County south of Surprise Valley, Modoc County. 1371 Comment
  NY215472  Thelypodium howellii subsp. howellii A. Tiehm 1984-6-25 8826 Lassen Rodeo Flat, 2.7 road miles west of the state line on Buckhorn road from Ravendale to highway 81. 1828.8 Comment
  CAS-BOT-BC88107  Thelypodium integrifolium subsp. complanatum T. C. Fuller 1980-8-6 20321 Lassen 0.3 km. south of Smoke Creek Ranch Road, 2 km. west of the state line, Rush Creek Drainage. Comment
  JEPS17734  Thelypodium integrifolium subsp. complanatum Rimo Bacigalupi with G. T. Robbins 1955-7-21 5428 Lassen 1.3 mi w Nevada State line (Rush Creek, s of Smoke Creek Ranch Rd, 17.5 mi e of U.S. Hwy 395); Rush Creek Comment
  CHSC14173  Thlaspi arvense K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5838 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  CHSC65302  Thlaspi arvense Vernon H. Oswald; Lowell Ahart 1994-8-14 7197 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 4.7 mi W of Hwy. 395, N of Susanville. At roadside between the road and the railroad. 1676 Comment
  JEPS97308  Thlaspi arvense Vernon H. Oswald and L. Ahart 1995-8-14 7197 Lassen T33N R14E NE1/4 Sec. 22, 5500 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 4.7 mi W of Hwy. 395, N of Susanville 1676 Comment
  RSA0039370  Thysanocarpus curvipes var. curvipes Lowell Ahart 2005-6-2 11953 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  UC61148  Tiquilia nuttallii J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley, Amedee Comment
  CAS-BOT-BC377102  Tragopogon porrifolius Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16354 Lassen 2 miles E. of Susanville Comment
  JEPS124549 Image available Tribulus terrestris P. L. Billings 1965-7-12 114 Lassen Pit River Over flow Bridge. #7-05, HWY 299. 1.8 mi from Nubiebur. Comment
  JEPS104431  Trichostema simulatum Lowell Ahart 2003-8-17 10514 Lassen On the w side of the paved road, on the e side of Highway 36, ca 1/4 mi sw of the Susan River, ca 8 mi (air) sw of Susanville. 1433 Comment
  UCD117583  Trientalis latifolia W. W. Robbins 1926-4-17 517 Lassen Grass Valley. Comment
  UC16446  Trifolium breweri M. S. Baker and Frank Nutting 1894-1 Lassen Silver Lake Comment
  NY802652  Trifolium kingii var. productum D. Isely 1971-7-12 11380 Lassen Bogard Campground, Lassen National Forest, ca. 2 miles south state #44 (ca. 30 miles northwest of Susanville) Comment
  CHSC112395  Trifolium longipes subsp. hansenii Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18775 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC80399  Trifolium longipes var. hansenii T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  CHSC7672  Trifolium macrocephalum Beverley J. Wise 1969-5-9 64 Lassen 7 mi. west of Susanville on north side of Hwy 36. 1493 Comment
  JEPS94126  Trifolium macrocephalum Vernon H. Oswald and Lowell Ahart 1998-5-22 9090 Lassen Hwy. 36 between Fredonyer Summit and Susanville (0.4 mi. w. of the Susan R. and Bizz Johnston Trail) 1417 Comment
  SEINET10487920  Trifolium macrocephalum Jeffrey Huber 1971-6-2 Huber 105 Lassen 4 mi s of adin along calif hwy 139 in basalt clay, valley floor in artemesia. 1341 Comment
  UCD111342  Trifolium macrocephalum Earl Coke 1934-1 s.n. Lassen location unknown. Comment
  CAS-BOT-BC230741  Trifolium productum M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC230743  Trifolium productum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch 2225 Comment
  CHSC4835  Trifolium productum R. Carter 1967-7-14 604 Lassen Growing in shaded woods on n side of rd. Ca. 3.5 mi e Silver Lake between rd (31N07) and Susan River. 1828 Comment
  CHSC5294  Trifolium productum M. West 1946-7-12 Lassen Silver Lake. 1981 Comment
  SEINET3131901  Trifolium productum M. E. Jones 1897-6-28 sn Lassen Top of Mt. Diamond, Susanville, Perkin's Ranch 2225 Comment
  CHSC5072  Trifolium repens D. L. Stites 1967-7-1 95 Lassen Ca. 10 mi se of Eagle Lake Biology Station, Lower Murrer's Meadow. 1371 Comment
  NY717612  Trifolium variegatum N. H. Holmgren 1980-7-4 9495 Lassen Observation Peak, south base in upper Smoke Creek drainage, 19 km (12 mi) airline distance east-southeast of Ravendale 1680 Comment
  UCD109410  Trifolium variegatum var. major K. M. Meyer; A. Townesmith 2007-7-21 144 Lassen Lassen National Forest. 3.3 mi. on rd. 110, off Hwy. A21. 1920 Comment
  POM27840  Trifolium variegatum var. variegatum Marcus E. Jones 1897-6-18 7442 Lassen Chat. [also Chats, a former settlement] 1524 Comment
  POM27706  Trifolium wormskioldii Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  UCD109955  Trifolium wormskioldii L. Whitney 1933-8-9 s.n. Lassen Slate Cr. Lassen Forest. 1920 Comment
  UC483  Triglochin maritima J. Burtt Davy Jun 17 1897-Jun 24 1897 3331 Lassen Honey Lake Valley 1219 Comment
  CHSC60928  Triglochin scilloides Vernon H. Oswald; Lowell Ahart 1993-7-8 5645 Lassen Pittville Rd. (Lassen 111, 36N01) near its intersection with 33N11, 0.4 mi N of Hwy. 44, near the SE end of Poison Lake. Beds of drainages and pools in meadow. 1709 Comment
  SBBG68581  Triphysaria eriantha subsp. eriantha E. Rockwell -Jun-1925 Lassen Eagle Lake 1554 Comment
  CAS-BOT-BC193529  Trisetum spicatum Clare B. Hardham 1971-8-22 18419 Lassen Diamond Mountain 2346 Comment
  SD131701  Triteleia hyacinthina Arnold Tiehm, Jan Nachlinger, Margaret Williams 1988-6-2 11705 Lassen East side of Snowstorm Mountain, 18.1 road miles north of the Wendel Road on Highway 395 from Susanville to Alturas. Growing along moist draws. 1402 Comment
  SEINET8502690  Triteleia hyacinthina A. Tiehm, J. Nachlinger, M. J. Williams 1988-1 11705 Lassen E side of Snowstorm Mountain, 18.1 road miles N of the Wendel Road on Hwy 395 from Susanville to Alturas. 1400 Comment
  UC1241777  Typha latifolia Verne Grant and Irving Schneider 1947-8-1 8231 Lassen s Cross Hills (near State Fish and Game nesting area, Madeline Plain); s of Cross Hills, Madeline Plain Comment
  UC1241787  Typha latifolia Malcolm A. Nobs and S. Galen Smith 1949-8-20 1474 Lassen nw shore Honey Lake (Honey Lake Valley, one mi s of Milford); Honey Lake Valley Comment
  CHSC27655  Urtica dioica subsp. holosericea George Deniso 1978-7-24 102 Lassen Near Miner's point, SE end of Eagle L. 1584 Comment
  HSC95256  Utricularia macrorhiza Gordon Leppig, Kai Neander, Juli Neander 1997-7-25 683 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC66248  Utricularia minor Vernon H. Oswald; Lowell Ahart 1996-6-24 7869 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. In Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  CHSC96702  Utricularia vulgaris Gordon Leppig; J. Cromwell 1997-7-27 612 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CAS-BOT-BC528860  Veratrum californicum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49218 Lassen Sierra Nevada, Elysian Valley northwest of Janesville 1325 Comment
  POM110333  Veratrum californicum Marcus E. Jones 1897-6-28 s.n. Lassen Susanville, Perkins Ranch 1463 Comment
  SEINET9186959  Verbena bracteata G. Schoolcraft 1998-8-4 2800 Lassen Along Hwy 395 berm. 1341 Comment
  CHSC36456  Veronica americana Susan H. Euing 1982-6-4 10 Lassen Ca. 50 yds along Willow Creek e of road to Murrers Upper Meadow. Comment
  CHSC7758  Veronica americana Beverly J. Wise 1969-5-18 112 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. 1554 Comment
  RSA523846  Veronica catenata L. R. Heckard, Peter Rubtzoff 1971-8-3 2702 Lassen 1.3 miles west of Pit River bridge at Bieber. Along Pit River overflow at bridge 7-03. 1220 Comment
  UC1023721  Veronica peregrina subsp. xalapensis Francis W. Pennell 1940-6-9 25757 Lassen 4 mi s of Madeline (Route 395) 1615 Comment
  CHSC66734  Veronica scutellata Vernon H. Oswald; Lowell Ahart 1996-8-1 8113 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  CHSC75500  Vicia americana var. americana Vernon H. Oswald; Lowell Ahart 1999-6-9 9755 Lassen Northeast of Susanville and 3.8 mi south of Biscar Wildlife Management Area on BLM 26030. 1347 Comment
  NY716243  Vicia americana var. americana R. M. Austin 06 1898 2221 Lassen Madaline plains Comment
  RSA716040  Vicia americana var. americana L. Ahart 2005-6-1 11866 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC1142998  Vicia americana var. americana August L. Hormay 1934-7-10 Lassen Black's Mtn. Headquarters; Lassen National Forest 1706 Comment
  UC1583957  Vicia americana var. americana G. Schoolcraft 1990-5-16 2053 Lassen about 1 mi w Muck Valley 1280 Comment
  CHSC4833  Viola bakeri R. Carter 1967-7-14 598 Lassen S side of rd. 3.5 mi e of Silver Lake between rd (31NO7) and Susan River. 1828 Comment
  CHSC61185  Viola beckwithii Vernon H. Oswald; Lowell Ahart 1993-5-12 5379 Lassen Canal crossing Hwy. 44, 3.5 mi NW of A21 (to Westwood). Comment
  UCD110898  Viola lobata H. Frederick 1925-7-28 s.n. Lassen Mt. Lassen. Comment
  RSA412739  Viola purpurea subsp. integrifolia Christopher Davidson 1975-6-7 2728 Lassen 2.1 mi W of Westwood on Hwy 36. 1555 Comment
  UC1542942  Viola purpurea subsp. venosa G. Schoolcraft 1987-4-29 1687 Lassen Ash Valley RNA Ash Valley 1554 Comment
  SEINET10524616  Vulpia megalura Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 892 Lassen Collected 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. Comment
  CAS-BOT-BC183944  Vulpia microstachys var. microstachys John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49202 Lassen Elysian Valley northwest of Janesville 1325 Comment
  UC1533161  Vulpia microstachys var. microstachys G. Schoolcraft 1986-5-19 1573 Lassen n slope Bald Mt. 1280 Comment
  CHSC4865  Wyethia R. Carter 1967-7-7 581 Lassen Collected ca. 20 yds from E shore of small resevoir, dry forest. Deans Meadow. Comment
  JEPS32044  Wyethia mollis Hilda W. Grinnell 1934-6-1 Lassen 1 mi w Susanville 1341 Comment
  UC1070500  Wyethia mollis A. Simontacchi 1940-7-27 767 Lassen 6.7 mi e Smoky Cabin; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1137288  Wyethia mollis K. E. Bradshaw 1939-5-27 240 Lassen n end of plot Lassen National Forest, Black Mountain E. F. Plot 39-1 1767 Comment
  CAS-BOT-BC383490  Wyethia mollis George W. Gillett 1957-7-29 957 Lassen Lassen Volcanic National Park. Snag Lake. Dry slopes near the Butte Lake trail above Snag Lake 1859 Comment
  RSA772869  Zannichellia palustris Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47203 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  RSA122229  Zigadenus paniculatus L. R. Short, J. Warren 1936-6-12 S- 434 Lassen Lassen Forest, Burgess Spr. Exp. Range 1845 Comment
  SEINET8520464  Zigadenus paniculatus H. Durio 1979-1 Lassen Comment



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