Search Results — 2000 specimen records retrieved (1601 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/consortium/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC13792  Abies concolor Anne Linda Brisk 1969-7-2 33 Lassen Growing along the shore of Mohogany Lake. Comment
  UCD133116  Abies concolor Beecher Crampton 1960-6-18 5711 Lassen Southern Warner Mountains, vicinity of Blue Lake Ranch. 1981 Comment
  OBI76923  Acer glabrum var. torreyi Anthony Baniaga 2011-7-10 441 Lassen Lassen Natl forest. E side of Diamond Mtn, along 28N64. Diamond Mtn quad t29N R11E sec 3 NW of NW 2012 Comment
  CHSC12419  Achillea millefolium Anne Linda Brisk 1969-6-20 9 Lassen Growing in Dean's Meadow. 1950 Comment
  CHSC4909  Achillea millefolium A. E. Anderson 1967-7-1 67 Lassen Along fence n of road to Murrer Ranch, 1 mi. from ranch buildings. 1371 Comment
  UC1125421  Achillea millefolium A. Simontacchi 1940-6-13 826 Lassen 3.3 mi wsw Patterson Mtn.; Halls Flat Quad. 1752 Comment
  UCD51450  Achnatherum X bloomeri Howard Gebel 1966-6-14 s.n. Lassen Belfast tableland. 1341 Comment
  RSA716057  Achnatherum hymenoides L. Ahart, John Dittes 2005-6-2 11996 Lassen Long Valley, about 41/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1428 Comment
  UC1131588  Achnatherum hymenoides E. Sawyer 1935-6-27 232 Lassen Long Valley Sierraville Quadrangle Comment
  UCD50355  Achnatherum hymenoides A. A. Beetle 1941-6-28 2806 Lassen Near Litchfield. Comment
  CAS-BOT-BC210662  Achnatherum lemmonii John Thomas Howell 1976-7-20 52004 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  SEINET249775 Image available Achnatherum lemmonii Beecher Crampton 1954-7-5 2054 Lassen 4.5 miles west of Susanville, along state highway 36. 1433 Comment
  UC1024755  Achnatherum lemmonii Leo Whitney 1933-7-15 2297 Lassen 25 mi w of upper end of Eagle Lake (Hall's Flat); Lassen National Forest 1737 Comment
  UC1137653  Achnatherum lemmonii George A. Fisher and Irwin H. Johnson F 198 Lassen Grass Valley Lassen National Forest 1696 Comment
  UCD50617  Achnatherum lemmonii Beecher Crampton 1960-6-18 5717 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD50709  Achnatherum lemmonii George A. Fischer; Irwin H. Johnson 1933-7-12 198 Lassen Grass Valley. 1696 Comment
  CAS-BOT-BC210742  Achnatherum nelsonii John Thomas Howell 1976-7-20 52026 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  UCD50787  Achnatherum nelsonii R. Tofsrud 1947-7-1 221 Lassen 13 miles E of Madeline. Comment
  JEPS97411  Achnatherum nevadense Vernon H. Oswald and L. Ahart 1995-6-19 6879 Lassen T30N R15E center Sect. 22, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395. Tufted perennial 1383 Comment
  SEINET249960 Image available Achnatherum nevadense Beecher Crampton 1954-7-5 2064 Lassen 4.5 miles west of Susanville, along state highway 36. 1433 Comment
  RSA129479  Achnatherum occidentale subsp. occidentale L. R. Short, J. Warren 1936-6-29 S- 462 Lassen Lassen [National?] Forest 1821 Comment
  RSA582082  Achnatherum occidentale subsp. occidentale J. T. Howell 1934-7-6 12431 Lassen Hall's Flat. 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
  CAS-BOT-BC218614  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49191 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  CAS-BOT-BC218615  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49486 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 Comment
  UC1143048  Achnatherum occidentale subsp. pubescens L. R. Short and J. Warren 1936-6-29 S- 462 Lassen Burgess Spring Experimental Range Lassen National Forest 1820 Comment
  CHSC42221  Achnatherum thurberianum C. E. Laver 1985-8-12 Lassen Ca. 8.5 mi se of Madeline and 9 mi ne of Termo. 2194 Comment
  UCD51422  Achnatherum thurberianum L. Whitney 1935-6-19 3267 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  UCD51425  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  UCD51427  Achnatherum thurberianum B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  CAS-BOT-BC412872  Aconogonon davisiae John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50667 Lassen NE. of Diamond Mt. 2255 Comment
  CHSC117280  Acroptilon repens Lowell Ahart; John Dittes 2016-7-15 21229 Lassen East side of road, where the fence is near the canal, about 200 yards southwest of where the levee road crosses Big Valley Cana, in Big Valleym about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1264 Comment
  CAS-BOT-BC110715  Aegilops cylindrica John Thomas Howell 1974-7-8 50505 Lassen Sierra Nevada. Susanville. 1295 Comment
  CHSC112436  Aegilops cylindrica Lowell Ahart; John Dittes, Todd Sloat 2013-6-9 18787 Lassen On the east side of the north-south road, on the west side of McArthur Diversion Canal, 2.1 air-miles of Rat Farm Boat Launch, 1.2 air-miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen Comment
  CHSC60832  Agastache parvifolia Vernon H. Oswald; Lowell Ahart 1993-6-28 5619 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. 1737 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
  UC1483882  Agastache parvifolia G. Schoolcraft 1979-9-3 193 Lassen on F.S. Road #16, 5-6 mi w Hwy 44 1950 Comment
  CHSC91811  Agoseris glauca G. Douglas Barbe 1974-8-20 1922 Lassen Upper Lond Valley. Hallelujah Junction, northwest corner of jct. of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC71219  Agoseris glauca var. laciniata Vernon H. Oswald; Lowell Ahart 1998-6-4 9142 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  UC29371  Agoseris grandiflora var. grandiflora M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixey Mts. Comment
  CHSC68840  Agoseris heterophylla Vernon Oswald; Lowell Ahart 1997-6-24 8601 Lassen South of Susanville on the north side of Diamond Mtn at a stream on Forest Rd. 29N43, 3.5 miles east of Gold Run Rd. (20N10). 1655 Comment
  OBI77284  Agoseris heterophylla Anthony Baniaga 2011-6-17 354 Lassen Lassen NF. N side of Hog Flat Reservoir. Pegleg Mtn quad T30N R10E sec 19 NE of NE 1678 Comment
  UCD107495  Agoseris monticola Tim Kuhn 2006-7-18 41 Lassen Eagle Lake Ranger District.. Comment
  UC585114  Agoseris parviflora E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1793 Lassen about 2 mi n Madeline 1363 Comment
  CAS-BOT-BC127582  Agropyron cristatum Margaret Williams 1974-8-4 74- 4 -78 Lassen Sierra Nevada. Burned area near Hallelujah Junction, west of Highway 395 and south of Highway 70. 1493 Comment
  HSC100160  Agropyron cristatum J. P. Smith, & J. O. Sawyer 2011-8-14 13375 Lassen Ramhorn Campground. 1383 Comment
  UC1130648  Agrostis alba H. S. Yates 1936-8-11 6069 Lassen Baxter Creek Susanville Quadrangle Comment
  CAS-BOT-BC127523  Agrostis capillaris Gary Schoolcraft 1984-7-30 1326 Lassen Along Smoke Creek about 5 miles below Big Springs. 1584 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-BC127238  Agrostis exarata Malcom A. Nobs; S. Galen Smith 1949-7-21 1057 Lassen 4 miles north of Madeline. Comment
  HSC69074  Agrostis exarata Gary Schoolcraft 1980-8-13 351 Lassen N side of Diamond Mountain, south of Susanville 1951 Comment
  UC773966  Agrostis exarata L. R. Short 1936-8-21 S- 499 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1798 Comment
  UCD39949  Agrostis exarata A. H. Murphy 1953-6-24 HG 48 Lassen Lassen County?: Hog Lake, James pasture. 762 Comment
  SEINET4341020  Agrostis exarata G. Schoolcraft 1994-8-1 2382 Lassen About 2 miles west of Boot Lake 2256 Comment
  JEPS28273  Agrostis idahoensis George W. Gillett 1957-7-22 877 Lassen near Snag Lake south shore (100 yards above lake); Lassen Volcanic National Park 1850 Comment
  UC1483834  Agrostis pallens G. Schoolcraft 1980-7-28 330 Lassen rocky meadow area e Tule Mountain (s of Blue Lake) 2042 Comment
  UCD53252  Agrostis pallens M. S. Baker; Frank Nutting 1894-7-21 s.n. Lassen Eagle Lake. 1524 Comment
  SEINET4341134  Agrostis pallens G. Schoolcraft 1994-7-6 2349 Lassen About 1.5 miles NE of Red Rock Lake 2042 Comment
  CAS-BOT-BC138801  Agrostis scabra John Thomas Howell 1959-9-23 34882 Lassen Lassen Park. North end of Juniper Lake. 2057 Comment
  CHSC77261  Agrostis variabilis G. Schoolcraft 1997-8-6 2662 Lassen Dimond Mtn. 2316 Comment
  SBBG115824  Agrostis variabilis J. T. Howell, G. H. True 1973-8-1 50234 Lassen Diamond Range, S of Susanville Comment
  POM75113  Aliciella lottiae Marcus E. Jones 1897-6-24 9872 Lassen 10 to 15 miles west from Amedee. 1220 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
  UC55670  Alisma plantago-aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3337 Lassen Susan River Honey Lake Valley 1219 Comment
  CHSC66736  Alisma triviale Vernon H. Oswald; Lowell Ahart 1996-8-1 8106 Lassen Mountain Meadows Reservoir SW of Westwood. On the receding shore of the reservoir NE of Indian Ole Dam. 1539 Comment
  CHSC64855  Allium acuminatum Vernon H. Oswald 1995-6-26 6926 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 8.5 mi w of Madeline, ca. 1 mi e of the reservoir at Fleming Sheep Camp. 1670 Comment
  UC725432  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen e Fredonyer Pass (e of Westwood on State Highway #36) 1645 Comment
  UCR45852  Allium acuminatum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6026 Lassen Ash Valley, along branch road off Adin-Madeline Road just south of bridge over Ash Creek, & c. 16 mi. SE of Adin; 2.5 mi. SE of junction with main road 1555 Comment
  HSC84105  Allium acuminatum Dale McNeal 1983-6-6 2843 Lassen Beside Horse Lake Rd., 3 mi. NE of junction of Hyw. 139 Comment
  RSA367043  Allium amplectens Anstruther Davidson s.n. Lassen [No locality information provided] Comment
  CAS-BOT-BC461096  Allium anceps B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6553 Lassen Just S of Ravendale 1580 Comment
  CHSC27592  Allium campanulatum Jennifer Estep 1978-7-5 22 Lassen E side of Mahogany Lake, S of Eagle L. 2060 Comment
  POM110223  Allium campanulatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  RSA504589  Allium lemmonii Bruce Bartholomew, B. Anderson 1988-6-25 4371 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  HSC22953  Allium lemmonii John Pratt 1970-6-21 32 Lassen 1707 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
  CHSC7662  Allium parvum Beverley J. Wise 1969-4-10 139 Lassen 2.5 mi. south of Susanville on Las. Co. Rd. 204. 1310 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
  HSC63955  Allium platycaule Teresa Prendusi 1980-5-30 1123 Lassen Mapes Spring, 11 mi. W of 395 and 19 mi. S Ravendale, near spring outflow 1585 Comment
  HSC84123  Allium platycaule Dale McNeal 1983-6-6 2844 Lassen Wash below Horse Lake Rd., 5.3 mi. NE of the junction of Hwy. 139 Comment
  RSA367108  Allium platycaule Rockwell 1925-7-1 s.n. Lassen Beckwith Comment
Read comments
Nov 17 2011
  UC106708  Allophyllum integrifolium T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  CAS-BOT-BC171316  Alnus incana subsp. tenuifolia John Thomas Howell; Gordon H. True 1973-8-1 50223 Lassen Headwaters of Boxter Creek, Canadian Zone forest, E slope of Diamond Range s of Susanville. Sierra Nevada Comment
  CAS-BOT-BC171317  Alnus incana subsp. tenuifolia Brighton C. Cain 1925-8-24 117 Lassen Mt. Lassen Volcaninc National Park, 1 mi below Drakesbad 1645 Comment
  UC1135175  Alnus incana subsp. tenuifolia C. W. Hanks 1934-9-27 94 Lassen Long Valley Sierraville Quadrangle (w slope, near Plumas National Forest) Comment
Read comments
May 8 2013
  UC576312  Alopecurus aequalis H. S. Yates 1936-8-12 6082 Lassen McKenzie Meadow Susanville Quad., McKenzie Meadow 1524 Comment
  UCD55848  Alopecurus aequalis L. Whitney 1933-8-4 s.n. Lassen 8 mi n.w. Slake Creek, Eagle Lake, Lassen National Forest. 1889 Comment
  JEPS119649  Alopecurus carolinianus Lowell Ahart, John Dittes 2012-7-9 18289 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  CHSC67189  Alyssum desertorum James D. Jokerst 1991-5-29 3317 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, E and adjacent to the highway +/- 200 m S of its junction with the road to the W across the N end of the Lake. 1584 Comment
  UC1951079  Alyssum desertorum Debra Valov 2009-4-24 2009012 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC29941  Amaranthus blitoides Robin L. Ondricek 1978-8-7 117 Lassen Parking area at Eagle Lake Field Station. 1554 Comment
  CHSC29942  Amaranthus blitoides Robin L. Ondricek 1978-8-2 111 Lassen Parking area at Eagle Lake Field Station. 1554 Comment
  HSC31339  Amaranthus blitoides D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19304 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  UC766126  Amaranthus blitoides R. F. Hoover 1940-10-5 4662 Lassen Johnstonville Comment
  JEPS121243  Amaranthus californicus Lowell Ahart, John Dittes 2013-7-22 18860 Lassen 50 yards W of the road levee, about 250 yards S of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UCD54542  Amaranthus californicus Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2727 Lassen E. of town of Susanville. Private property N of California Correctional Facility. 1248 Comment
  CHSC71844  Amaranthus powellii Vernon Oswald; Lowell Ahart 1998-9-8 9570 Lassen Hwy 299 at the RR overpass on the east side of Nubieber. 1255 Comment
  CHSC76262  Amaranthus powellii Lowell Ahart; Vernon H. Oswald 1999-9-13 8226 Lassen Along a small 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
  JEPS41027  Ambrosia acanthicarpa W. L. Jepson 1939-8-11 19380 Lassen Milford 1280 Comment
  RSA252462  Ambrosia acanthicarpa R. F. Thorne, C. W. Tilforth 1969-9-6 39266 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  UCR67435  Ambrosia acanthicarpa George K. Helmkamp 1990-9-23 A- 3 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  CHSC25302  Amelanchier pallida Pauleen Broyles 1977-5-30 147 Lassen Spencer Spring ca 8 km nne of Herlong. Canyon below spring. 1620 Comment
  CAS-BOT-BC142540  Amelanchier utahensis Gary Schoolcraft 1984-6-5 1203 Lassen Upper Spencer Basin, 29-16-24 1889 Comment
  CAS-BOT-BC142541  Amelanchier utahensis Brighton C. Cain 1925-8-24 116 Lassen 1 mile below Drakesbad, Mt. Lassen Volcanic National Park 1645 Comment
  UC1137669  Amelanchier utahensis George A. Fischer and Irwin H. Johnson 1933-7-14 F 270 Lassen Lassen Forest 1737 Comment
  JEPS107822  Amphiscirpus nevadensis Lowell Ahart, John Dittes 2005-6-2 11975 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
  CAS-BOT-BC28271  Amphiscirpus nevadensis William Anderson 1963-6-25 s.n. Lassen Dakin unit, Honey Lake Refuge. Comment
  CAS-BOT-BC222256  Amsinckia John Thomas Howell 1934-6-10 11899 Lassen 5 miles n. of Horse Lake on road to Alturas Comment
  HSC3549  Amsinckia lycopsoides Fred J. Kindel 1955-6-6 Lassen Doyle Comment
  JEPS114653  Amsinckia menziesii var. menziesii Lowell Ahart, John Dittes 2008-6-20 14909 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
  JEPS61105  Amsinckia menziesii var. menziesii W. L. Jepson 1918-8-2 7777 Lassen Beckwith Pass 1463 Comment
  UC24607  Amsinckia menziesii var. menziesii Milo S. Baker 1893-7-14 Lassen Money Lake Valley Comment
  JEPS94122  Amsinckia tessellata var. tessellata Vernon H. Oswald and Lowell Ahart 1998-5-22 9091 Lassen Hwy. 395 at an intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  UC198379  Amsinckia tessellata var. tessellata J. G. Lemmon Lassen Sierra and Long Valleys Comment
  CAS-BOT-BC63951  Antennaria argentea A. M. Vollmer; L. Beane 1953-7-1 101 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  UC1523709  Antennaria argentea Gary Schoolcraft 1981-7-8 501 Lassen north of Coulthurst Flat 1828 Comment
  UC891493  Antennaria argentea C. L. Hitchcock 1940-5-26 6616 Lassen ca 12 mi n of, at lava beds Fall River Mills (Shasta Co.); Fall River 1371 Comment
  HSC68156  Antennaria dimorpha J. P. Smith, J. O. Sawyer 1971-5-23 4657 Lassen Along Hwy. 139, 23 miles south of junction with road to Thermo. 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
  JEPS94104  Antennaria dimorpha Vernon H. Oswald and Lowell Ahart 1998-5-22 9088 Lassen Hwy. 36 between Fredonyer Summit and Susanville (0.4 mi. w. of the Susan R. & Bizz Johnston Trail) 1417 Comment
  HSC69050  Antennaria dimorpha Gary Schoolcraft 1980-4-8 203 Lassen On east side of Schaffer Mtn. about 1/2 mile west of Hwy. 395 1463 Comment
  UC1266740  Antennaria flagellaris Gary Schoolcraft 1981-5-27 410 Lassen (on rocky gravelly site near Yellow Pine Forest) Hayden Hills 1737 Comment
  UCD128922  Antennaria flagellaris G. Schoolcraft 1981-5-27 0456 Lassen Hayden Hill. 1737 Comment
  CHSC92677  Antennaria geyeri L. P. Janeway; B. Castro 2005-7-10 8478 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. Northerly-facing side of the crest. 1859 Comment
  UC1609122  Antennaria geyeri Vernon H. Oswald and Lowell Ahart 1993-6-14 5528 Lassen 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Sandy Beach, w shore of Eagle Lake, upper beach between road and lake); Eagle Lake Rd 1566 Comment
  CAS-BOT-BC58692  Antennaria luzuloides A. A. Heller 1938-6-23 15189 Lassen East of Westwood Comment
  CAS-BOT-BC58694  Antennaria luzuloides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16360 Lassen Near NE end of Eagle Lake Comment
  HSC97018  Antennaria luzuloides L. Ahart, John Dittes 2005-6-1 11862 Lassen 1/2 mile west of Scott Rd., Long Valley, about 2 air miles NW of the intersection of Scott Rd. and Hwy. 70. 3.9 air miles NW of Hallelujah Junction 1449 Comment
  RSA32730  Antennaria luzuloides A. A. Heller 1938-6-23 15189 Lassen State highway 36, about 4 miles east of Westwood Comment
  UC585069  Antennaria luzuloides E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1791 Lassen about 2 mi n Madeline 1363 Comment
  CAS-BOT-BC58695  Antennaria luzuloides Doris Kildale Gillespie 1930-5-12 9317 Lassen Fredonia Pass near Susanville Comment
  RSA0065403  Antennaria luzuloides M. P. Harthill 1972-6-17 826 Lassen Madeline. 1676 Comment
  UC1523723  Antennaria rosea Gary Schoolcraft 1982-8-10 865 Lassen se of, along Hwy 139 Adin 1584 Comment
  UCD149585  Antennaria rosea G. Ledyard Stebbins 1982-9-16 C 247 Lassen Vicinity of Eagle Lake. Comment
  JEPS95712  Anthemis cotula Vernon H. Oswald and L. Ahart 1995-8-14 7175 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a flooded playa (Mud Flat) 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. Roadside weed. 1348 Comment
  JEPS49803  Apocynum androsaemifolium Jos. Grinnell 1928-6-26 Lassen Butte Lake 1889 Comment
  UC1537515  Apocynum cannabinum Gordon H. True Jr. 1937-7-10 782 Lassen Bull Flat, Refuge 1Q 1524 Comment
  POM75751  Apocynum pumilum var. rhomboideum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  POM99591  Aquilegia formosa Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  JEPS53113  Arabis puberula M. S. Baker and F. P. Nutting 1894-7-2 Lassen s. side Dixey Mts. Comment
  JEPS28468  Arabis rectissima var. rectissima George W. Gillett 1957-9-4 1123 Lassen about 1/8 mi below Widow Lake (Widow Lake Trail); Lassen Volcanic National Park 2011 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
  RSA0001920  Arabis sabulosa var. frigida Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1037282  Arceuthobium americanum Leo Whitney 1934-7-28 1717 Lassen ca 7-8 mi sw Eagle Lake (Bridge Creek Camp); Lassen National Forest 1737 Comment
  SDSU6214  Arctium minus D. F. Howe 1966-8-24 4297 Lassen 32 miles northeast of Litchfield on #395. 1402 Comment
  CAS-BOT-BC45899  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  UCR18731  Arenaria congesta Frank C. Vasek 1975-7-11 750711- 07 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  RSA768779  Arenaria congesta var. congesta L. Ahart, John Dittes 2010-7-31 17011 Lassen About 2300 feet north 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. 1511 Comment
  UC465892  Arenaria congesta var. congesta Franklin P. Nutting Lassen Silver Lake Comment
  UC120411  Arenaria congesta var. suffrutescens T. S. Brandegee 1892-7-26 Lassen Milford Comment
  UC1037334  Argemone rotundata Leo Whitney 1934-8-5 1959 Lassen 10 mi se of Susanville (Harvey Lake Valley); Harvey Lake Valley 1402 Comment
  CAS-BOT-BC82116  Arnica chamissonis John Thomas Howell 1934-7-8 12512 Lassen Harvey Valley Comment
  CHSC65290  Arnica chamissonis Vernon H. Oswald; Lowell Ahart 1995-8-14 7186 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. 1645 Comment
  SD113191  Arnica chamissonis Darley F. Howe 1964-8-2 3921 Lassen East Creek, Warner Mountains, Modoc National Forest 2010 Comment
  RSA0115088  Arnica chamissonis subsp. foliosa Lowell A. Ahart, John Dittes 2008-6-20 14902 Lassen About 150 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
  CDA10117  Arnica cordifolia T. C. Fuller 1963-7-15 10896 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  SEINET8734516 Image available Arnica foliosa var. incana A. L. Hormay 1941-1 8 Lassen Lassen; Sec. 31, T 33N, R. 9 E, Little Valley 1679 Comment
  CAS-BOT-BC82713  Arnica longifolia Clarence R. Quick 1962-6-18 62 -16 Lassen Road 21, Blacks Mountain E.F. Hdqrts., east of Halls Flat, north of Poison Lake Comment
  CAS-BOT-BC85030  Arnica sororia E. B. Babcock; G. L. Stebbins 1936-6-8 1788 Lassen Gentle north facing slope of hillside, 2 miles north of Madeline. 1371 Comment
  CHSC108006  Arnica sororia Lowell Ahart; John Dittes 2011-6-20 17483 Lassen About 30 yards east of the stream, about 80 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
  RSA0059452  Arnica sororia Lowell Ahart, John Dittes 2011-6-20 17483 Lassen About 30 yards east of the stream, about 80 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
  RSA702450  Arnica sororia L. P. Janeway 2004-6-26 8166 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  UC29582  Arnica sororia M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Mts. Comment
  JEPS103204  Arnica sororia G. Schoolcraft 1994-6-9 2346 Lassen West of Hwy. 139 near Grasshopper valley 1706 Comment
  RSA359361  Artemisia arbuscula subsp. arbuscula L. M. Shultz, John Shultz 1985-6-23 8603 Lassen 41 miles north of Susanville on Hwy 395. 1433 Comment
  RSA388738  Artemisia arbuscula subsp. arbuscula Jack Reveal 1984-8-15 s.n. Lassen Dry Flats in YPF along hwy 44, ca. 19 miles north of Susanville 1585 Comment
  UCR268958  Artemisia arbuscula subsp. arbuscula Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31433 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
  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
  HSC68803  Artemisia cana subsp. bolanderi Gary Schoolcraft 1979-10-3 198 Lassen In Dry Valley 1/4 mi. west of Dry Valley Gap 1616 Comment
  UC1479613  Artemisia cana subsp. bolanderi G. Schoolcraft 1979-9-27 195 Lassen Painter Flat 1719 Comment
  UCD129268  Artemisia cana subsp. bolanderi W. Robert Powell 1985-7-30 3523 Lassen 16 air miles SSE of Adin (Modoc Co.), 0.9 mile SSE of Hayden Hill L.O., 0.4 mile west of Daisy Dean Spring. East slope, 3 percent. 1676 Comment
  UCR67466  Artemisia douglasiana George K. Helmkamp 1990-9-23 G- 9 Lassen north of Ravendale 1677 Comment
  CAS-BOT-BC90330  Artemisia douglasiana Clare B. Hardham 1971-8-22 18374 Lassen North slopes, Diamond Mountain 2133 Comment
  CHSC42149  Artemisia ludoviciana C. E. Laver 1985-7-15 Lassen Ca. 7.8 mi E of Madeline and 4 mi N of Spooner Reservoir. 1584 Comment
  RSA523927  Artemisia ludoviciana subsp. ludoviciana G. H. True 1937-7-10 783 Lassen Bull Flat, Refuge 1Q 1524 Comment
  SEINET10722478  Artemisia ludoviciana subsp. ludoviciana Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 134 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  CAS-BOT-BC90778  Artemisia ludoviciana subsp. ludoviciana Louella Bass 1980-5-1 s.n. Lassen Standish, Honey Lake Valley Comment
  SEINET245807  Artemisia nova Arnold Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 road miles north of Karlo Road on highway 395 from Litchfield to Alturas, just east of the highway 1402 Comment
  SEINET263202  Artemisia nova J. Lyman 1994-4-23 4241 Lassen Along Highway 395, ca. 25 miles north of Susanville on grade up to BLM land 1433 Comment
  UCD129340  Artemisia nova W. A. Williams 1951-8-6 s.n. Lassen Black's Mountain Range Experiement Station, (old Hell's Flat Ranger Station site). 25 miles south of Pittville. 1584 Comment
  UCD149841  Artemisia spinescens William Anderson 1965-4-20 s.n. Lassen Wendel. Comment
  UCD55270  Artemisia spinescens Ellen Dean 2006-5-15 3080 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. Northern part of Johnston property near sandy wash. 1249 Comment
  CHSC13797  Artemisia tridentata Cathy Crittenden 1970-7-8 28 Lassen Approx. 100 yds north of E. L. B. S. 1524 Comment
  JEPS37009  Artemisia tridentata subsp. tridentata W. L. Jepson 1918-8-5 7818 Lassen near South Fork Peak 1645 Comment
  SEINET230064  Artemisia tridentata subsp. tridentata Leila M. Shultz, John S. Shultz 1985-6-23 8611 Lassen Long Valley Creek drainage, 5 miles north of Doyle 1305 Comment
  SEINET3397751  Artemisia tridentata subsp. tridentata Unknown 1994-1 s.n. Lassen 15 mi. N. of Litchfield 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
  CHSC5039  Asclepias fascicularis L. B. Barlow 1967-7-11 129 Lassen Vic. Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  UC1537160  Asclepias speciosa Gordon H. True Jr. 1936-6-22 525 Lassen Honey Lake Valley 1219 Comment
  RSA401104  Asclepias speciosa George Willet 1935-6-27 s.n. Lassen Susanville 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
  RSA503251  Aster integrifolius Bruce Bartholomew, B. Anderson 1988-7-22 4502 Lassen Mosquito Creek, 2km SW of Patterson Meadow, southern end of the Warner Mtn. 2080 Comment
  CHSC93569  Astragalus andersonii Lowell Ahart; John Dittes 2005-6-1 11917 Lassen Long Valley, along the east side of a poor road, about 4 1/2 (air) miles north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  RSA59492  Astragalus anxius E. K. Balls 1950-5-19 14784 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
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Jan 3 2013
  SEINET4856104  Astragalus anxius Unknown 1991-7-16 6108 Lassen Ash Valley, ca. 25 km W of madeline, along Ash Valley Rd., on boundary of T38N, R11E, Sect. 32 and T37N, R11E, Sect. 5. 1550 Comment
  CHSC118474  Astragalus canadensis var. brevidens Don Lepley 2016-9-17 6 /28/2015 Lassen Eagle Lake Ranger District. Southwest corner of Eagle Lake, roughly a half-mile northeast of entrance of Christie Campground, near end of rough road past Eagle Lake Resort. UTM 683577 x 4493277 1559 Comment
  SEINET5323826  Astragalus canadensis var. brevidens G. Schoolcraft 1999-6-29 2845 Lassen Along road to Buckhorn Res. East of Madeline Plains 1713 Comment
  UC82577  Astragalus canadensis var. brevidens unknown 1892-6-20 Lassen Milford Comment
  HSC82253  Astragalus curvicarpus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6005 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  CDA26649  Astragalus curvicarpus T. C. Fuller 1965-6-3 13607 Lassen 1.3 miles west-northwest of Janesville. 0 Comment
  RSA152593  Astragalus curvicarpus I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16331 Lassen 13.5 mi. E of Susanville. Comment
  SEINET10838264  Astragalus curvicarpus Paul Gallian, David B. Dunn 1971-6-2 Gallian 509 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
  SEINET5325008  Astragalus curvicarpus F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. 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
  NY803536  Astragalus curvicarpus var. curvicarpus P. Gallian 1971-6-2 509 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402 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
  CHSC37537  Astragalus filipes M. S. Taylor 1982-5-29 4569 Lassen Along dirt road paralleling Hwy 395 on its e side, ca. 1/2 mi n of 395 jct with Scott Rd, ca. 20 mi n of Reno. 1524 Comment
  SBBG30554  Astragalus filipes D. Myrick 1968-6-19 1959 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  SEINET3140019  Astragalus filipes R. W. Spellenberg 1996-6-13 12334 Lassen 26 km S of Doyle on US Hwy 395 1430 Comment
  UC13367  Astragalus filipes M. S. Baker and Frank Nutting 1894-6-20 Lassen Big Valley Comment
  UCD55263  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
  RSA111097  Astragalus filipes H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-15 5459 Lassen Volcanic mesa E. of Viewland. 1311 Comment
  NY674268  Astragalus gibbsii G. Schoolcraft 1993-6-8 2285 Lassen US Highway 395 at Airport Road 1274 Comment
  UC1128797  Astragalus gibbsii E. Sawyer 1935-6-27 234 Lassen Long Valley Sierraville Quad., Long Valley Comment
  CDA26675  Astragalus gibbsii Taylor Jun 1938 Lassen Susanville. 0 Comment
  NY674272  Astragalus gibbsii J. T. Howell 1974-7-10 50515 Lassen Sagebrush flat at the cemetery, Janesville 1295 Comment
  RSA110069  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5692 Lassen South of Milford. 1433 Comment
  JEPS109851  Astragalus inversus Dean W. Taylor 2006-6-29 19560 Lassen Halls Flat; along County Road 111 3.6 miles N of Poison Station (siding)(ca. 12 air miles NE of Old Station) 1706 Comment
  RSA517314  Astragalus inversus Barbara Ertter 1987-7-25 7314 Lassen Ca 27 airmiles NW of Susanville, FR33N02 to Harvey Valley W of jct w/ FR33N04 1737 Comment
  SEINET3165897  Astragalus inversus R. W. Spellenberg 2006-6-19 13744 Lassen along USFS access road 3.4 km E of Calif. Hwy. 139, the jct. of the road and highway 31 km SE of Modoca Co. line (just S of Adin) 1670 Comment
  UC1142997  Astragalus inversus August L. Hormay 1934-7-2 Lassen Black's Mtn Headquarters , Black's Mtn Headquarters (Lassen National Forest) 1706 Comment
  CAS-BOT-BC186944  Astragalus iodanthus G. Schoolcraft 1998-6-30 2744 Lassen N. slope of N. end of Ft. Sage Mtns. 1950 Comment
  CAS-BOT-BC229050  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC229051  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  UC13384  Astragalus lemmonii M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  NY675496  Astragalus lentiginosus var. chartaceus N. H. Holmgren 1980-7-5 9519 Lassen Upper Smoke Creek drainage, 14.8 km (9.2 miles) east of U.S. Highway 395 via Rye Patch Canyon, 19 km (12 miles) airline distance east-southeast of Ravendale 1680 Comment
  POM25710  Astragalus lentiginosus var. floribundus Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  POM26417  Astragalus lentiginosus var. lentiginosus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  UC1609460  Astragalus lentiginosus var. lentiginosus 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
  CHSC7665  Astragalus lentiginosus var. platyphyllidius Beverley J. Wise 1969-5-23 54 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  CHSC7667  Astragalus lentiginosus var. platyphyllidius Beverley J. Wise 1969-5-4 56 Lassen 1.7 mi. west on Shaeffer Mtn Lookout Rd off Hwy 395 (approx. 1 mi. south of Las Co. Rd. 338). 1676 Comment
  RSA109610  Astragalus lentiginosus var. platyphyllidius H. D. Ripley, R. C. Barneby 1943-6-14 5744 Lassen Hidden Valley E of Susanville 1311 Comment
  CDA26707  Astragalus malacus T. C. Fuller 1963-6-11 10659 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  CHSC64786  Astragalus malacus Vernon H. Oswald 1995-5-31 6814 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 2.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1341 Comment
  HSC63126  Astragalus malacus Teresa Prendusi 1980-4-28 1101 Lassen Rice Canyon 1341 Comment
  CAS-BOT-BC192841  Astragalus pulsiferae Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  JEPS87063  Astragalus pulsiferae Dean Wm. Taylor with Glenn Clifton 1990-6-12 10877 Lassen ca 0.5 mi before the Modoc County Line (road from Adin to Ash Valley (Forest Road 88)); Modoc Plateau, road from Adin to Ash Valley 1554 Comment
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Jan 31 2015
  JEPS107291  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
  NY694125  Astragalus pulsiferae var. pulsiferae H. D. D. Ripley 1943-6-7 5499 Lassen East side of Beckworth Pass, south Lassen Co. 1494 Comment
  NY694127  Astragalus pulsiferae var. pulsiferae See comments 1981-6-23 614 Lassen West of Susanville 1463 Comment
  RSA104884  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1943-6-17 5799 Lassen East side of Beckwourth Pass. 1494 Comment
  RSA0074200  Astragalus pulsiferae var. pulsiferae L. T. Stephenson 1897-09 6523 Lassen Chat Comment
  CHSC25301  Astragalus purshii Pauleen Broyles 1977-5-30 144 Lassen Spencer's Basin ca 8 km n of Herlong. 1770 Comment
  HSC28311  Astragalus purshii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19269 Lassen Harvey Valley near Cone Springs Comment
  SEINET10841190  Astragalus purshii Mary Susan Taylor 1974-5-4 Taylor 224 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
  CAS-BOT-BC194094  Astragalus purshii var. purshii Clare B. Hardham 7446 Lassen Diamond Peak 2286 Comment
  CHSC60739  Astragalus purshii var. purshii Vernon H. Oswald; Lowell Ahart 1993-6-14 5520 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
  POM45163  Astragalus purshii var. purshii Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  UC1609114  Astragalus purshii var. purshii Vernon H. Oswald and Lowell Ahart 1993-6-14 5520 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the w shore Eagle Lake ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89); w shore Eagle Lake, Sandy Beach 1566 Comment
  CAS-BOT-BC194089  Astragalus purshii var. purshii C. R. Quick 1964-7-28 64 -84 Lassen Edge of Halls Flat , Black's Mt. Experimental Forest Comment
  RSA110893  Astragalus purshii var. purshii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-14 5741 Lassen West of Susanville. 1311 Comment
  CAS-BOT-BC192972  Astragalus purshii var. tinctus John Thomas Howell 1934-6-10 11862 Lassen Honey Lake Valley 37 miles s. of Susanville Comment
  JEPS114761  Astragalus purshii var. tinctus Lowell Ahart, John Dittes 2008-6-19 14888 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
  JEPS94605  Astragalus purshii var. tinctus Vernon H. Oswald and Lowell Ahart 1997-5-27 8517 Lassen on Forest Route 38N04 2.6 mi ne Hwy. 139 ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat)); Williams Reservoir 1682 Comment
  SBBG67420  Astragalus purshii var. tinctus S. W. Hutchinson -Jun-1925 561 Lassen Eagle Lake 1554 Comment
  SEINET10490025  Astragalus purshii var. tinctus David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17789 Lassen 6 mi n of hallelujah jct on us hwy 395 in artemisia tridentata pinyon pine Jeffery pine along high ridge and sandy wash. 1402 Comment
  UC82594  Astragalus whitneyi T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CHSC67217  Astragalus whitneyi var. confusus James D. Jokerst 1991-5-29 3303 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
  SEINET12162056  Astragalus whitneyi var. confusus J. Vale, Wagnon, K.; Knight, W.; Knight, I. 1981-1 4136 Lassen ca 3mi S of Adin on hwy.139 1372 Comment
  CAS-BOT-BC200874  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch 2225 Comment
  CAS-BOT-BC200875  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 7 miles below Eagle Lake 1524 Comment
  NY701852  Astragalus whitneyi var. siskiyouensis H. D. D. Ripley 1943-6-14 5747 Lassen Hidden Valley, east of Susanville 1585 Comment
  OBI75877  Athysanus pusillus Anthony Baniaga 2011-6-29 399 Lassen Lassen Natl Forest. Fredonyer Pass, S of Willard ck. Fredonyer Pass quad T29N R10E sec 14 NW of SE 1500 Comment
  CHSC64780  Atriplex argentea var. hillmanii Vernon H. Oswald 1995-6-7 6842 Lassen Modoc Plateau. 1.8 mi s of Wendel Rd. (Lassen 320) on an unsigned dirt road near milepost 19.5 just e of Skedaddle Creek, e of Wendel, ne of Susanville. 1231 Comment
  NY526733  Atriplex canescens R. F. Hoover 1940-10-5 4668 Lassen Wendel Comment
  CAS-BOT-BC170276  Atriplex confertifolia C. B. Wolf 1931-9-5 1279 Lassen Honey Lake Valley, 1/2 mile from Medee R.R. Station on road to Doyle. 1219 Comment
  UC769938  Atriplex confertifolia R. F. Hoover 1940-10-5 4663 Lassen Wendel Comment
  SEINET515856  Atriplex gmelinii Vernon H. Oswald 1998-9-8 9581 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.) 1259 Comment
  JEPS94838  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
  CHSC76274  Atriplex triangularis Lowell Ahart; Vernon Oswald 1999-9-13 8209 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
  UC1924265  Avena fatua Debra Valov 2004-6-9 2004265 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UC1035992  Balsamorhiza Helen K. Sharsmith 1955-6-22 4500 Lassen 5 mi beyond, on road to Likely Bue Lake; Warner Mountains, Modoc National Forest 1767 Comment
  RSA584835  Balsamorhiza hirsuta Bruce Bartholomew, M. Gilbert, L. Skog 1993-5-13 6557 Lassen Just S. of Ravendale. 1580 Comment
  CAS-BOT-BC106485  Balsamorhiza hookeri Helen K. Sharsmith 1955-6-22 4501 Lassen Warner Mountains, Modoc National Forest - Five miles beyond Blue Lake on road to Likely 1767 Comment
  JEPS109626  Balsamorhiza hookeri Dean W. Taylor 2002-6-21 18178 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 Comment
  CAS-BOT-BC106492  Balsamorhiza hookeri Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen Fredonyer Pass, 13 1/2 mi. w. of Susanville State Hwy #36 Comment
  SEINET10859166  Balsamorhiza hookeri David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17769 Lassen Approx. 12 mi. S of Adin on CA Hwy. 139, in basalt & clay; along edge of road on rolling knoll, in Artemisia-Juniper assoc. 1372 Comment
  SEINET10924971  Balsamorhiza hookeri Billy Joe Cox 1971-6-2 Cox 3265 Lassen Approx. 2 mi. N of Susanville, across CA Hwy. 139 from Lassen Jr. College, in grassland at edge of Jeffery Pine & Artemisia. 1341 Comment
  SEINET7239770 Image available Balsamorhiza hookeri var. hirsuta G. Schoolcraft 1998-7-8 2750 Lassen South of Round Corral Reservoir 1890 Comment
  UCD129528  Balsamorhiza macrolepis Tom Vestal DVM 2002-5-23 s.n. Lassen south of Modoc National Forest Boundary along Little Valley Rd., NNE of Catfish Reservoir. Comment
  UC1119027  Balsamorhiza sagittata H. P. Hagge 1929-9-11 20 Lassen Logan Mtn. Eagle Lake Quad. 1828 Comment
  UC485131  Balsamorhiza sagittata Franklin P. Nutting Lassen Big Valley Mts. Comment
  CHSC63703  Bassia hyssopifolia Vernon H. Oswald 1994-9-6 6469 Lassen Willow Creek Wildlife Area on Hwy. 139, ca. 10 mi (air) N of Susanville. Common in the parking lot and along the levee road on the N side of the creek. 1490 Comment
  CHSC65309  Bergia texana Vernon H. Oswald; Lowell Ahart 1995-8-14 7179 Lassen Modoc Plateau. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  UCD54547  Bergia texana Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2731 Lassen E. of town of Susanville. Private property N of California Correctional Facility. 1248 Comment
  SEINET11193808  Berteroa incana W. Harnach 2006-5-31 1229 Lassen Long Valley, Anderson Ranch, Scott Road, ca 5.5 miles N of Hwy 70. 1457 Comment
  SEINET3100770 Image available Berteroa incana Arnold Tiehm 2005-7-14 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road miles W of highway 395 on highway 70 then 5.5 road miles N on Scott Road. 1490 Comment
  UCR182957  Berteroa incana C. Battis 2005-8-2 s.n. Lassen Modoc Plateau, Anderson Ranch in southern part of county [c. 5.5 miles north of Hwy 70 on Scott Road] 1479 Comment
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May 25 2012
  NY1102107  Berula erecta R. F. Hoover 1940-10-1 4658 Lassen Near Honey Lake, between Janesville and Standish Comment
  UC1191930  Berula erecta Malcolm A. Nobs, S. Galen Smith 1949-8-20 1487 a Lassen 1 mi s of Doyle (Long Creek); Long Creek Comment
  CHSC112972  Bidens cernua Lowell Ahart; John Dittes 2013-7-23 18897 Lassen Along the south margin of the levee road, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CDA10495  Bidens cernua var. cernua Gordon Leppig 1998-8-17 1047 Lassen Northern California Peatlands; Modoc National Forest. Blue Lake Ranch. Comment
  CHSC96712  Bidens cernua var. cernua Gordon Leppig 1998-8-17 1047 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CAS-BOT-BC128033  Blepharipappus scaber Clare B. Hardham 1961-6-16 7451 Lassen Gold Run Creek south of Susanville Comment
  CAS-BOT-BC128046  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-25 3754 Lassen Susanville, on hills just west of town 1310 Comment
  CAS-BOT-BC128048  Blepharipappus scaber A. M. Vollmer; L. Beane 1953-7-1 99 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC13477  Blepharipappus scaber J. Pitts 1967-6-23 266 Lassen 2 mi s of Eagle Lake Field Station, on the e side of the road. Comment
  CHSC5201  Blepharipappus scaber 1944-7-1 Lassen Eagle Lake. 1584 Comment
  JEPS114752  Blepharipappus scaber Lowell Ahart, John Dittes 2008-6-19 14876 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 1578 Comment
  POM351056  Blepharipappus scaber J. T. Howell 1934-6-10 11894 Lassen Horse Lake Comment
  SBBG30617  Blepharipappus scaber D. Myrick 1968-6-19 1958 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  UC1119057  Blepharipappus scaber A. Simontacchi 1940-7-8 5575 Lassen 5.1 mi s of Jelly Camp (Halls Flat); Halls Flat 1699 Comment
  UC1302428  Blepharipappus scaber Clare B. Hardham 1961-6-16 7451 Lassen s of Susanville (Gold Run Creek, Sierra Nevada Mountains); Sierra Nevada Mountains, Gold Run Creek Comment
  CAS-BOT-BC128047  Blepharipappus scaber B. J. Hammerly 1941-6-21 49 Lassen Dry plateau 8 mi. SE. of Likely on Blue Lake road Comment
  CAS-BOT-BC14091  Boechera pauciflora John Thomas Howell; Gordon H. True 1973-7-31 50038 Lassen Sierra Nevada. Diamond Range. On road from Janesville to Thompson Peak. 1737 Comment
  CHSC60335  Boechera pinetorum Mary Ann Showers 1992-6-13 2542 Lassen Lassen Volcanic National Park. Meadow along trail from Snag Lake jct to Widow Lake. 1828 Comment
  UC10162  Boechera platysperma M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  CHSC7708  Boechera puberula Beverley J. Wise 1969-4-29 35 Lassen 3.5 mi. north of Susanville on Rnd Valley Rd. off Hwy 139. 1341 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
  JEPS95056  Boechera retrofracta Vernon H. Oswald and Lowell Ahart 1997-5-27 8495 Lassen North of Susanville on Forest Route 38N04 (between Highway 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Highway 139. 1546 Comment
  CAS-BOT-BC25511  Boechera retrofracta Clarence Roy Quick 1961-6-21 61 -24 Lassen Black Mountain Experimental Forest northeast of Lassen Peak. Forest adjacent to Road 21. 1798 Comment
  SEINET3165716  Boechera sparsiflora R. W. Spellenberg 2006-6-19 13745 Lassen along a USFS access road 1 km E of Calif. Hwy 139, the junction of road and highway 31 km SE of Modoc Co. line (just S of Adin) 1665 Comment
  CAS-BOT-BC25707  Boechera sparsiflora H. D. Ripley; R. C. Barneby 1943-6-13 5702 Lassen South of Gifford. 1569 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
  HSC16160  Brasenia schreberi Fred J. Kindel 1955-7-14 Lassen Mt. Meadows Reservoir Comment
  SEINET201569  Brodiaea coronaria subsp. coronaria Arthur Cronquist 1959-6-18 8485 Lassen 5 miles south of Adin Comment
  CAS-BOT-BC149496  Bromus briziformis John Thomas Howell 1977-6-22 52398 Lassen Northeast of Susanville on road to Eagle Lake. Comment
  CAS-BOT-BC149497  Bromus briziformis Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen Few miles north of Leitchfield in lava country. Comment
  CAS-BOT-BC149498  Bromus briziformis Louella Bass 1982-6-20 s.n. Lassen 0.5 mile west of Karls. Comment
  UCD32673  Bromus briziformis Beecher Crampton 1954-7-6 2077 Lassen Lassen County, 15 miles south of Ravendale, along US highway 395. 1676 Comment
  CAS-BOT-BC149583  Bromus carinatus var. carinatus Parkison 1916-6-21 42 Lassen Near Patterson. 1706 Comment
  UCD59087  Bromus carinatus var. marginatus L. Whitney 1933-8-1 s.n. Lassen Harvey Mountain. Lassen Forest. 1828 Comment
  UC570172  Bromus commutatus H. S. Yates 1936-8-11 6074 Lassen Baxter Creek 1280 Comment
  UCD32660  Bromus commutatus Beecher Crampton 1954-7-5 2056 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD58463  Bromus commutatus L. D. Whitney 1935-6-23 s.n. Lassen Fruit Growers Supply Co., Camp #10. Comment
  CAS-BOT-BC155276  Bromus inermis Louella Bass 1980-8-4 s.n. Lassen Standish. Comment
  CAS-BOT-BC155324  Bromus inermis John Thomas Howell 1973-7-10 49766 Lassen Sierra Nevada. Near Westwood. 1554 Comment
  CAS-BOT-BC155325  Bromus inermis John Thomas Howell 1975-7-23 51410 Lassen Sierra Nevada. Along Highway 395 between Johnstonville and Jonesville. 1280 Comment
  CHSC5253  Bromus inermis subsp. inermis P. Balch 1955-7-23 Lassen Stafford's Eagle Lake Resort. 1569 Comment
  CAS-BOT-BC162182  Bromus orcuttianus John Thomas Howell; Gordon H. True 1973-8-1 50180 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  UC1024828  Bromus racemosus Leo Whitney 1935-6-12 3232 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10 Lassen National Forest; , Fruit Grower's Supply Company, Camp Comment
  HSC79991  Bromus tectorum William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  RSA126866  Bromus tectorum L. R. Short, J. Warren 1936-6-9 S- 409 Lassen Burgess Spr. Exp. Range; Lassen Forest. 1860 Comment
  SEINET4564906  Bromus tectorum F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  UC1924233  Calamagrostis stricta Debra Valov 2004-6-9 2004263 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CAS-BOT-BC438314  Calandrinia ciliata T. L. Secrest 1961-6-8 s.n. Lassen Edge of McCoy Flat Reservoir, ca. 14 mi. n. of Westwood Comment
  UCD149989  Callitriche palustris William Anderson 1963-6-12 s.n. Lassen Honey Lake Valley. 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
  CHSC6270  Calochortus leichtlinii W. Vinyard 1946-6-17 Lassen Mt. Fredonyer, Eagle Lake. 2133 Comment
  UC1523812  Calochortus leichtlinii Gary Schoolcraft 1983-7-19 1096 Lassen s slope Fredonyer Peak 2255 Comment
  UC727118  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen e of Fredonyer Pass 1219 Comment
  POM253058  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen Along Highway 36 in the valley east of Fredonyer Pass Comment
  SEINET4169872  Calochortus leichtlinii A. A. Heller 1938-6-26 Lassen E. of Fredonyer Pass on State Hwy 36. 1219 Comment
  CHSC4768  Calochortus macrocarpus R. Carter 1967-7-16 620 Lassen Willow Creek Valley, E of Murrer's Ranch, 1.5 mi W of highway 139 on rd to Eagle Lake, ca. 12 mi N of Susanville. Comment
  CHSC6271  Calochortus macrocarpus A. Santos 1946-7-5 Lassen East side of Eagle Lake. 1615 Comment
  UC3429  Calochortus macrocarpus Milo S. Baker 1894-7-21 Lassen Eagle Lake 1524 Comment
  CAS-BOT-BC175762  Caltha leptosepala A. M. Vollmer; L. Beane 1953-7-1 91 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  HSC63826  Calyptridium monospermum Teresa Prendusi 1980-7-1 Lassen Champs Flat, 7 mi. W of northern tip of Eagle Lake 1677 Comment
  UC1137569  Calyptridium monospermum A. Simontacchi 1940-6-8 873 Lassen Lassen National Forest, Hall Flat Ranger Station Hall Flat Ranger Station; Lassen National Forest, Hall Flat Ranger Station 1706 Comment
  UC1136685  Calyptridium umbellatum A. Simontacchi 1940-5-17 733 Lassen 5.7 mi ssw of Patterson Mountain (Lassen National Forest); Lassen National Forest 1706 Comment
  UC699726  Calyptridium umbellatum Farris Farris 1936-6-15 Lassen Eagle Lake road 1676 Comment
  SEINET188321  Calyptridium umbellatum C. L. Hitchcock 1940-5-26 6608 Lassen Ca 12 mi N of Fall River Mills (Shasta Co) on Fall River 1372 Comment
  JEPS88237  Calystegia occidentalis subsp. occidentalis Vernon H. Oswald and Lowell Ahart 1996-6-17 7811 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Highway 36 ca. 7 mi W of Susanville. Modoc Plateau. Comment
  CAS-BOT-BC497000  Camassia quamash Luella Bass 1980-6-14 EV 2 - 80 Lassen Elysian Valley Comment
  HSC22954  Camassia quamash subsp. breviflora John Pratt 1970-6-21 32 Lassen Seasonally flooded lake edge 1707 Comment
  CDA39275  Camassia quamash subsp. quamash G. D. Barbe, Phyllis Hiatt, Mike Keffer 1980-6-4 2797 Lassen Secret Creek drainage, west side of Highway 395 at the foot of basaltic Saddle Rock, 15 miles (24.1 km) south of Ravendale. 0 Comment
  CHSC93245  Camelina microcarpa John Dittes; Scott Chamberlain 2004-6-28 1019 Lassen Modoc Plateau; Long Valley; ca. 4.4 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.6 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; near road. 1465 Comment
  JEPS96126  Camelina microcarpa Vernon H. Oswald and Lowell Ahart 1996-6-24 7881 Lassen 2.5 mi s of Eagle Lake (0.5 mi e of Eagle Lake Road (A1), at ne corner of Papoose Meadows, (0.1 mi e of where Papoose Creek leaves the n end of meadow)); Modoc Plateau, Papoose Meadows 1636 Comment
  NY850967  Camissonia boothii subsp. alyssoides A. Tiehm 1980-5-29 5754 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  POM39324  Camissonia boothii subsp. alyssoides Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  RSA294814  Camissonia boothii subsp. alyssoides Arnold Tiehm 1980-5-29 5754 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1232 Comment
  SEINET3282785 Image available Camissonia boothii subsp. alyssoides Marcus E. Jones 1897-6-23 Lassen Amedee. 1219 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
  SEINET5343990  Camissonia contorta M. J. Williams 1974-7-26 74 -L-22 Lassen 2 mi west of Hallelujah Junction, south of Hwy. 70 1494 Comment
  UC69560  Camissonia contorta J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Chat Honey Lake Valley, Long Valley Comment
  RSA17675  Camissonia parvula Elmer I. Applegate 1934-5-4 8930 Lassen Secret Valley Comment
  RSA186551  Camissonia parvula Peter H. Raven 1962-5-28 17870 Lassen Along U.S. Highway 395, 32 miles south of Milford Comment
  CHSC93694  Camissonia pubens Lowell Ahart; John Dittes 2005-6-2 11993 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
  RSA74347  Camissonia subacaulis Milo S. Baker 1952-5-23 12418 Lassen Wet Spot, E of Chester, Hwy 36. Comment
  HSC42415  Camissonia tanacetifolia Barbara Kelly 1977-8-9 565 Lassen 14.3 mi. E of Madeline on the dirt road from Adin Comment
  NY852070  Camissonia tanacetifolia A. R. Kruckeberg 1954-6-22 3322 Lassen 6 miles south of Likely on Highway 395 Comment
  CAS-BOT-BC160833  Camissonia tanacetifolia subsp. quadriperforata James Jokerst 1983-5-31 1787 Lassen Near Madeline Plains 1583 Comment
  CAS-BOT-BC160860  Camissonia tanacetifolia subsp. tanacetifolia Margaret Williams; Steven Williams 1974-7-26 74 -L-24 Lassen Burned area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  POM204165  Camissonia tanacetifolia subsp. tanacetifolia J. T. Howell 1934-7-8 12505 Lassen Spalding s, Eagle Lake. 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
  RSA60365  Camissonia tanacetifolia subsp. tanacetifolia E. K. Balls 1950-5-9 15954 Lassen 0.5 mi. south of Modoc Co. Line, Highway 395 1220 Comment
  CHSC117199  Capsella bursa-pastoris Lowell Ahart; John Dittes 2016-6-7 20980 Lassen On the west 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
  JEPS124378  Capsella bursa-pastoris Lowell Ahart, John Dittes 2015-7-13 20308 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS87505  Cardamine breweri Vernon H. Oswald and Lowell Ahart 1993-8-3 5743 Lassen ca 13 mi (air) n. Lake Almanor (s.w. edge Cooper Swamp located e. of Silver Lake just e. of the Caribou Wilderness); Cooper Swamp 1932 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
  CAS-BOT-BC18286  Carex John Thomas Howell; Gordon H. True 1973-8-1 50228 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. Headwaters of Baxter Creek. 2133 Comment
  CAS-BOT-BC17908  Carex angustata George Wilson Gillett 1957-7-22 883 Lassen Lassen Volcanic National Park. South Shore of Snag Lake. 100 yards from lake. 1850 Comment
  HSC97144  Carex angustata L. P. Janeway 2003-7-24 7912 Lassen High Cascade Range. Along end of meadow and marsh along Bridge Creek, 1.8 km. N of Hwy. 44, just NW of the Cinder Pit 1716 Comment
  UC190429  Carex angustata M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CAS-BOT-BC18107  Carex athrostachya James Stokes 1939-6-15 s.n. Lassen Bullard Lake west of Grasshopper Valley. Comment
  CHSC60428  Carex athrostachya Mary Ann Showers 1992-6-13 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  UC1100437  Carex athrostachya Herbert L. Mason 1947-7-9 13300 Lassen 5 mi E of Bieber Comment
  UC1537643  Carex athrostachya Gordon H. True Jr. 1939-6-15 994 Lassen Bullard Lake, W of Grasshopper Valley Comment
  CHSC114422  Carex davyi Don Lepley 2012-7-26 Lassen On the south flank of Whaleback Mt., about 3.5 air miles north-northwest of Christie Campground at Eagle Lake and about 500 feet from Road 32N02. UTM coordinates: 10T 68j0730 E x 4498190 N 1767 Comment
  SEINET13351078  Carex davyi B. L. Wilson, P. Zika 2011-8-7 16805 Lassen Highway 44 near mile post 12.50, at junction with road 32N22 and road to Harney Valley 1740 Comment
  POM80807  Carex densa Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  CAS-BOT-BC34933  Carex densa T. C. Fuller 1966-7-20 14963 Lassen South side of road to Pittville, 5.4 miles west of Little Valley Post Office. NW Lassen County. Comment
  CHSC65136  Carex disperma Vernon H. Oswald; Lowell Ahart 1995-7-24 7145 Lassen High Cascade Range. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. 1905 Comment
  HSC82188  Carex douglasii Thomas W. Nelson, Jane P. Nelson 1980-7-6 6037 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  JEPS94477  Carex douglasii Vernon H. Oswald and Lowell Ahart 1997-5-27 8502 Lassen 0.1 mi e of Highway 139 (n of Susanville on Forest Route 38N04 between Highway 139 near Willow Creek Guard Station and Coyote Flat, small creek paralleling road); Forest Route 38N04 1546 Comment
  SEINET10437847  Carex douglasii B. L. Wilson, P. Zika 2011-8-7 16803 Lassen Where route A21 corsses the railroad tracks north of Westwood. 1607 Comment
  UC773860  Carex douglasii L. R. Short and Wm. Gansberg June 1936 S- 419 Lassen Burgess Spring Experiment Range 1856 Comment
  CAS-BOT-BC19776  Carex douglasii L. P. Janeway 1990-7-4 3766 Lassen Plumas National Forest. Milford Ranger District. East side of saddle, ca. 0.8 mile northeast of Meadowview Peak. 1981 Comment
  CAS-BOT-BC19778  Carex douglasii Clarence Roy Quick 1962-6-17 32 -18 Lassen sagebrush flat, north of DeLasmutt Ranch on old dirt road to Blacks Mountain E.F. Headquarters. 1615 Comment
  CAS-BOT-BC19780  Carex douglasii H. D. Ripley; R. C. Barneby 1943-6-14 5145 Lassen Hidden Valley, E of Susanville. 1584 Comment
  CAS-BOT-BC75502  Carex echinata var. ormantha Leo Whitney 1934-8-2 1967 Lassen Bridge Creek Camp. 1737 Comment
  CHSC60783  Carex filifolia var. erostrata Vernon H. Oswald; Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 1.8 mi N of Hwy 44, between Poison Lake and Susanville. 1749 Comment
  HSC48223  Carex filifolia var. erostrata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19171 Lassen Harvey Valley near Cone Springs Comment
  UC1133496  Carex filifolia var. erostrata A. Simontacchi 1940-5-17 729 Lassen 5.7 mi ssw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD140369  Carex haydeniana John Thomas Howell 1934-6-14 12163 Lassen near Lost Lake, Warren Mountains. Comment
  CHSC61065  Carex heteroneura var. heteroneura Vernon H. Oswald; Lowell Ahart 1993-8-3 5744 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  HSC48184  Carex hoodii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19242 Lassen 2 mi. N of Westwood Comment
  UC2031875  Carex hoodii Nick Otting and Bruce Newhouse 2003-7-15 705 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 air miles south-southwest of Susanville. 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
  SEINET4292184 Image available Carex integra Unknown 2003-1 7916 Lassen 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. Swain Mountain 7.5' quad. Comment
  HSC95183  Carex interior Gordon Leppig 1998-7-12 954 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC35780  Carex jonesii J. T. Howell 1934-6-14 12165 Lassen Warner Mts.; near Lost Lake 2438 Comment
  HSC103653  Carex lenticularis var. limnophila Thomas W. Nelson, Jane Nelson 1985-8-10 8010 Lassen Along north side of Silver Lake 1829 Comment
  HSC103673  Carex lenticularis var. lipocarpa Thomas W. Nelson, Jane Nelson 1985-8-10 8023 Lassen Margin of pond along south side of lava flow on west side of Silver Lake 1829 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
Read comments
May 19 2014
  JEPS103202  Carex microptera G. Schoolcraft 1994-7-7 2366 A Lassen south end of Warner Mountains West of Boot Lake 2194 Comment
  CHSC59187  Carex multicaulis Vernon H. Oswald; Lowell Ahart 1992-9-15 5217 Lassen Lassen Volcanic National Park. Ca. 0.3 mi SW of Island Lake, on the NW foot of Bonte Pk., ca. 1.5 mi E of Juniper Lake campgrounds. 2133 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
  CAS-BOT-BC119737  Carex nebrascensis George Wilson Gillett 1957-7-22 881 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. 1850 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
  HSC103619  Carex nebrascensis Thomas W. Nelson, Jane Nelson 1985-8-10 8014 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC119715  Carex nervina Clare B. Hardham 1961-6-17 7508 Lassen Baxter Creek south of Susanville. Comment
  CAS-BOT-BC119043  Carex pellita George Wilson Gillett 1957-7-26 906 Lassen East Shore of Butte Lake, along water line. 1844 Comment
  CHSC66270  Carex pellita Vernon H. Oswald; Lowell Ahart 1996-6-24 7892 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 southern-most spring on the E side of the meadow 1633 Comment
  JEPS128406  Carex pellita Catherine Bauer with Ellen Bauer Benson 2017-8-16 14 Lassen South of Highway 44, North of Butte Lake, between Butte Creek and access road into Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  JEPS28385  Carex pellita George W. Gillett 1957-7-26 906 Lassen e shore Butte Lake 200 yards beyond outlet; Lassen Volcanic National Park, Butte Lake 1844 Comment
  UC2031883  Carex pellita Nick Otting 2003-7-16 691 Lassen Modoc Plateau, Smoke Creek, 14 air miles southeast of Ravendale. Comment
  JEPS106522  Carex petasata L. P. Janeway 2004-6-26 8139 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
  UC1755280  Carex petasata Dean W. Taylor 2007-6-14 20126 Lassen stream channel draining Lower Gooch Valley into Gordon Valley [dry on this date in a very dry year, stream channel with fluvial geomorphology indicating flow in spring on average] 1828 Comment
  CAS-BOT-BC118402  Carex praegracilis G. Schoolcraft 1987-5-5 1695 Lassen Along shore of Eagle Lake near Stone Ranch. 1554 Comment
  JEPS109091  Carex preslii D. W. Taylor 2008-6-19 20226 Lassen Unnamed meadow equidistant between Papoose Meadwo and Mahogany Lake Comment
  HSC48183  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19243 Lassen 2 mi. N of Westwood Comment
  CHSC96453  Carex simulata Gordon Leppig; J. Cromwell 1997-7-27 619 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  SEINET13715331  Carex straminiformis G. Schoolcraft 1997-8-6 2669 Lassen Diamond Mountain, N slope 2317 Comment
  CAS-BOT-BC116624  Carex subfusca John Thomas Howell 1973-7-10 49779 Lassen Fredonyer Pass. 1737 Comment
  CAS-BOT-BC116625  Carex subfusca Alice Eastwood; John Thomas Howell 1940-6-15 8304 Lassen Willow Creek near Hayden Hill. Comment
  CAS-BOT-BC116609  Carex subfusca Hans Leschke 1954-7-5 s.n. Lassen Hat Lake 1965 Comment
  CAS-BOT-BC116613  Carex subfusca Hans Leschke 1958-8-17 1568 Lassen Reflexion Lake 1792 Comment
  UC1142963  Carex utriculata A. L. Hormay 1941-6-17 24 Lassen near Westwood (Meadow Lake); Lassen National Forest 1615 Comment
  HSC95272  Carex vesicaria Gordon Leppig, Kai Neander, Juli Neander 1997-7-26 695 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC106570  Castilleja angustifolia K. Schierenbeck 2008-5-3 Lassen Fort Sage Mtns. 1439 Comment
  CHSC7630  Castilleja angustifolia Beverley J. Wise 1969-5-15 104 Lassen 28.1 mi. east of Susanville on Hwy 395. 1524 Comment
  CAS-BOT-BC249341  Castilleja applegatei Gary Schoolcraft 1983-6-29 1044 Lassen Ash Valley 1554 Comment
  CHSC62002  Castilleja applegatei Eenam Sin 1992-6-3 23 Lassen 1 mi s of 4-carners on road to Gallatin Peak. 1524 Comment
  CHSC67068  Castilleja applegatei Willis Ball 1969-6-20 20 Lassen Found approx. 2 mls. down from Dean's Meadow going towards 5 pts. 1828 Comment
  CAS-BOT-BC249340  Castilleja applegatei Gary Schoolcraft 1983-7-19 1097 Lassen S. slopes of Fredonyer Pk. 33-12-27 2255 Comment
  JEPS128167  Castilleja applegatei subsp. pinetorum M. C. Mahoney, J. A. Nash 2017-9-9 CA 350 -90 Lassen Fredonyer Mountain. Comment
  UC1609116  Castilleja arachnoidea Vernon Oswald and Lowell Ahart 1993-6-14 5525 Lassen 2.0 mi ene Spaulding Tract Rd. (Rd. 518,33N89) (Eagle Lake Rd (Lassen A1), at Sandy Beach, on the w shore of Eagle Lake, on the upper beach between the road and the lake); Eagle Lake 1566 Comment
  JEPS23848  Castilleja campestris subsp. campestris Peter H. Raven and Otto T. Solbrig 1959-6-17 13295 Lassen 4.8 mi s Madeline (along U.S. Hwy 395) Comment
  UCD55264  Castilleja chromosa Ellen Dean 2006-5-15 3062 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
  CHSC23901  Castilleja lacera A. W. Harvilik 1967-7-8 39 Lassen Collected in Murrer's Meadow ca. 3 mi se of Eagle Lake Biological Station. 1524 Comment
  JEPS74943  Castilleja lacera T. I. and F. M. Chuang 1975-7-23 7556 Lassen just w Westwood (area of golf course) Comment
  CAS-BOT-BC226034  Castilleja lacera Ella D. Cantelow 1940-5-31 4439 Lassen E of McArthur Comment
  CHSC4817  Castilleja linariifolia R. Carter 1967-7-16 617 Lassen Willow Creek Valley, e of Murrer's Ranch, 1.5 mi w of highway 139 on rd to Eagle Lake, ca 12 mi n of Susanville, on s side of rd. Comment
  CHSC59818  Castilleja linariifolia Mary Meyer 1980-8-9 Lassen In lava rock outcrop above junction of Horse Camp Spring and Cottonwood Spring. 1706 Comment
  HSC63893  Castilleja linariifolia Teresa Prendusi 1980-7-1 Lassen McCoy Flat, 5 mi. E of northern tip of Eagle Lake 1646 Comment
  HSC69066  Castilleja linariifolia Gary Schoolcraft 1979-7-5 124 Lassen Near top of Observation Peak 2134 Comment
  POM44364  Castilleja miniata Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC1523790  Castilleja miniata Gary Schoolcraft Aug 1979 Lassen Goodrich Meadow 1554 Comment
  CAS-BOT-BC241005  Castilleja pilosa Margaret Williams; Lyn Wise 1976-5-31 76- 22 -1 Lassen Near Nervine Aero Service, E of Beckwourth 1524 Comment
  CHSC27743  Castilleja pilosa N. E. Heiken 1978-7-28 68 Lassen E of Eagle L., base of basalt jumble, along Lower Dry L. 1645 Comment
  CHSC37346  Castilleja pilosa Jenifer Estep 1978-6-27 17 Lassen SE of Eagle L. at Mahogany L. Comment
  JEPS114696  Castilleja pilosa Lowell Ahart, John Dittes 2008-6-20 14947 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
  UC1012185  Castilleja pilosa Francis W. Pennell 1940-6-9 25761 Lassen 5 mi s Ravendale (Route 395) 1645 Comment
  UC1063499  Castilleja pilosa A. Simontacchi 1940-6-30 910 Lassen 4.2 mi s Blacks Mtn.; Lassen National Park, Halls Flat Quad. 1699 Comment
  CAS-BOT-BC241004  Castilleja pilosa E. K. Balls 1950-5-19 14 .778 Lassen 17.5 mi. W. of Madeline on rd. from Adin 1676 Comment
  RSA505409  Castilleja psittacina R. C. Bacigalupi, S. Galen Smith 1957-6-28 6004 Lassen 5.9 miles south of Madeline. 1616 Comment
  CHSC99525  Castilleja tenuis Lowell Ahart; John Dittes 2008-6-22 15027 Lassen Along a small natural drainage, about 20 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
  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
  JEPS4336  Castilleja tenuis Brown and Wieslander 1922-7-18 36 Lassen Martin Springs; Eagle Lake Comment
  RSA0035396  Castilleja tenuis Lowell Ahart, John Dittes 2008-6-20 14944 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
  RSA0105574  Castilleja tenuis Lowell Ahart, John Dittes 2013-7-22 18840 Lassen About 30 yards southeast of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1012485  Castilleja tenuis Francis W. Pennell 1940-6-7 25727 Lassen 8 mi e Nubieber (Route 299) 1310 Comment
  UC1137685  Castilleja tenuis L. R. Short and Wm. Gansberg 1936-6-8 S- 394 Lassen Burgess Spring Experimental Range; Lassen Forest 1743 Comment
  UC27205  Castilleja tenuis J. Burtt Davy Jun 17 1897-Jun 24 1897 3359 Lassen Adobe meadows; Honey Lake Valley Comment
  SBBG128749  Castilleja tenuis L. Ahart, J. Dittes 2008-6-22 15027 Lassen a small natural drainage, ca. 20 yards W of the rd levee, open meadow area, in Big Valley, ca. 2.1 mi (air) NE of the Headqaurters at Ash Crk State Wildlife Area, ca. 5.0 mi (air) NE of Bieber 1262 Comment
  RSA0027351  Caulanthus major John F. Emmel 1994-7-17 1328 Lassen Summit area of Observation Peak. 2378 Comment
  UC1281477  Ceanothus X flexilis H. E. McMinn 1941-8-27 5403 Lassen 3.5 mi from Pine Cone Inn (and 5 mi from Nubieber); 5 mi from Nubieber Comment
  UC1553382  Ceanothus cordulatus G. Schoolcraft 1988-7-11 1823 Lassen ca 5 mi n Hwy 36 (along Hwy 44) 1676 Comment
  CAS-BOT-BC52050  Ceanothus prostratus L. B. Barlow 1967-7-4 92 Lassen 5 mi. South of Eagle Lake Biological Station on Gallatin Beach Road 1737 Comment
  CHSC30565  Ceanothus prostratus Sori H. Shad 1970-7-9 22 Lassen Found in Pine area 6 mile east of E.L.B.S. 1524 Comment
  UC1071529  Ceanothus prostratus A. Simontacchi 1940-5-13 706 Lassen 4.1 mi W of Harvey Mountain 1981 Comment
  CDA37979  Centaurea diffusa T. C. Fuller 1962-8-28 9481 Lassen Secret Valley, Highway 395, 3.3 miles north of road to Karlo. 0 Comment
  UCR67437  Centaurea solstitialis George K. Helmkamp 1990-9-23 D- 4 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  CDA35515  Centaurea squarrosa CDFA Staff 1986-6-18 s.n. Lassen Near Nubieber, off Hwy 299. 0 Comment
  CDA7335  Centaurea squarrosa T. C. Fuller 1959-10-15 3125 Lassen East of Pitt River, road to Lookout, ca. 2 miles north of Bieber. 0 Comment
  CDA7336  Centaurea squarrosa T. C. Fuller 1966-7-2 14961 Lassen 0.1 mile to 0.9 mile south of the bridge at Pittville. 0 Comment
  CAS-BOT-BC106029  Centaurea virgata subsp. squarrosa T. C. Fuller 1966-7-20 14961 Lassen On both sides of the road from 0.1 to 0.9 mi. s. of the bridge at Pittville Comment
  CAS-BOT-BC106074  Centaurea virgata subsp. squarrosa Barrett Anderson 1986-7-9 3128 Lassen Road to Day, about 2.4 km N of Rte 299. 1065 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
  CHSC76087  Centromadia pungens subsp. pungens Lowell Ahart; Vernon H. Oswald 1999-9-13 8224 Lassen 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
  JEPS95910  Centromadia pungens subsp. pungens Lowell Ahart 1999-9-13 8224 Lassen 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
  CAS-BOT-BC388151  Cerastium fontanum John Thomas Howell; Gordon H. True 1973-8-1 50162 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  JEPS88403  Cerastium fontanum subsp. vulgare Vernon H. Oswald and Lowell Ahart 1996-8-1 8126 Lassen ca. 2 mi. n. Dyer Mt. Lookout (Forest Rd. 28N56 (D-Line), downhill side of rd., s.-s.w. of Westwood) 1737 Comment
  CAS-BOT-BC400181  Ceratophyllum demersum Milo S. Baker July 25 3644 a Lassen Eagle Lake Comment
  UCD150404  Ceratophyllum demersum William Anderson 1963-6-12 s..n. Lassen Honey Lake Valley. Comment
  CHSC32986  Cercocarpus ledifolius var. ledifolius Robert Smallwood 1970-7-8 138 Lassen Approx. 300 yds. north of E.L.B.S. 1524 Comment
  CHSC23518  Chaenactis douglasii var. douglasii Wayne O. Baum 1971-7-6 71 -50 Lassen Slope of Gallatin Peak. 2011 Comment
  CHSC93690  Chaenactis douglasii var. douglasii Lowell Ahart; John Dittes 2005-6-1 11893 Lassen On the east side of Scott Road, Long Valley, about 4 3/8 miles (air) north of the intersection of Scott Road and Highway 70, about 5.7 miles (air) northwest of Hallelujah Junction. 1460 Comment
  UC1567442  Chaenactis stevioides G. Schoolcraft 1989-5-31 1886 Lassen about 4 mi n of Wendel Rd. (along Skedaddle Ranch Road) 1493 Comment
  UC31043  Chaenactis xantiana J. Burtt Davy Jun 17 1897-Jun 24 1897 3411 Lassen Amedee Honey Lake Valley Comment
  UC90090  Chaenactis xantiana T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  HSC68932  Chaetadelpha wheeleri Gary Schoolcraft 1980-6-12 279 Lassen Near Skedaddle Creek on Wendel Hwy. 1238 Comment
  UC1125091  Chamaesaracha nana Robert W. Gardner 1937-6-20 G- 23 Lassen Burgess Spring Experimental Range; Halls Flat Quad. 1699 Comment
  NY1001400  Chamaesyce maculata G. Schoolcraft 1998-9-17 2810 Lassen Susanville BLM office 1268 Comment
  SEINET9250629  Chamaesyce maculata G. Schoolcraft 1998-1 2810 Lassen Susanville, BLM office. 1268 Comment
  CHSC27603  Chamaesyce serpillifolia subsp. serpillifolia Jerry Snodgrass 1978-7-25 Lassen Near Field Station (CSUC), E side of Eagle L., at wide spot in dirt road. 1554 Comment
  CHSC58840  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1992-7-16 5114 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. Beds of creek and reservoir. 1691 Comment
  JEPS88232  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1996-6-17 7771 Lassen 7 mi W of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off N side of Hwy 36 ca. 0.2 mi E of the 7 mi post); Modoc Plateau 1432 Comment
  JEPS97305  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and L. Ahart 1995-8-14 7178 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville 1348 Comment
  UC1609091  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1993-7-8 5660 Lassen 1.9 mi n Hwy 44 (Pittville Rd., on se edge of lake, between the rr and the lake); Poison Lake 1709 Comment
  POM312487  Chenopodium berlandieri var. zschackei Irving Schneider 1947-8-1 8229 Lassen Irrigation ditch running SW into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
  CDA3039  Chenopodium botrys T. C. Fuller 1964-10-7 12693 Lassen Hillside Cemetery, south side of Highway 299 to Fall River Mills, ca. 2 miles southwest of Nubieber. 0 Comment
  JEPS97785  Chenopodium chenopodioides Annetta M. Carter 1945-9-30 1726 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  UC1745664  Chenopodium chenopodioides Annetta M. Carter 1945-9-30 1726 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  CAS-BOT-BC473050  Chenopodium desiccatum Ynez Whilton Winblad 1935-10-1 s.n. Lassen Horse Lake Comment
  CHSC25311  Chenopodium leptophyllum Pauleen Broyles 1977-6-14 158 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 Comment
  UC1483846  Chimaphila menziesii G. Schoolcraft 1980-7-29 344 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  POM105904  Chorizanthe watsonii Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  UCSB17200  Chorizanthe watsonii Hardham, Clare 1961-6-17 Lassen Baxter Cr. south of Susanville, Sierra Nevada Mountains 1524 Comment
  CAS-BOT-BC36325  Chrysolepis sempervirens George W. Gillett 1957-7-26 905 Lassen Point of rocks wets of Butte Lake outlet and above trail 1844 Comment
  JEPS28679  Chrysolepis sempervirens George W. Gillett 1957-7-26 905 Lassen point of rocks w Butte Lake outlet (and above trail); Lassen Volcanic National Park 1844 Comment
  CAS-BOT-BC106022  Chrysothamnus humilis R. K. Gierisch; D. H. Esplin 1969-8-27 3600 Lassen Lassen Forest 1706 Comment
  UC1137594  Chrysothamnus humilis George A. Fischer and Irwin H. Johnson 1933-9-8 F- 281 Lassen w end of Patterson Flat; Lassen Forest, Patterson Flat 1706 Comment
  UC773961  Chrysothamnus humilis L. R. Short and J. Warren 1936-8-17 S- 495 Lassen Burgess Spring Experiment Range Lassen Forest 1760 Comment
  UCR67461  Chrysothamnus nauseosus George K. Helmkamp 1990-9-23 D- 10 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  SEINET3392549  Chrysothamnus nauseosus subsp. hololeucus E. D. McArthur 1982-1 EDM- 1358 Lassen NW of Janesville @ jct of CO ros 205 & 219 Comment
  CDA19740  Chrysothamnus viscidiflorus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Madeline. 0 Comment
  RSA0094567  Chrysothamnus viscidiflorus subsp. puberulus Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31420 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. 1732 Comment
  CHSC65296  Chrysothamnus viscidiflorus subsp. viscidiflorus Vernon H. Oswald 1995-8-14 7183 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. Roadside. 1645 Comment
  RSA22626  Chrysothamnus viscidiflorus subsp. viscidiflorus Mary DeDecker 1955-8-25 263 Lassen Honey Lake: Highway 395. Comment
  SEINET7451023 Image available Chrysothamnus viscidiflorus subsp. viscidiflorus G. Schoolcraft 1994-9-13 2430 Lassen Just above gate along road to Fredonyer Peak lookout 2256 Comment
  UC1776665  Chrysothamnus viscidiflorus subsp. viscidiflorus G. Schoolcraft 1994-9-13 2430 Lassen Just above gate along road to Fredonyer Pk. lookout 2255 Comment
  UC773960  Chrysothamnus viscidiflorus subsp. viscidiflorus L. R. Short and Wm. Gansberg 1936-8-13 S- 494 Lassen Burgess Spring Experiment Range 1770 Comment
  UC921129  Chrysothamnus viscidiflorus subsp. viscidiflorus Vesta Holt 1945-8-11 Lassen Eagle Lake Comment
  RSA252470  Chrysothamnus viscidiflorus var. lanceolatus R. F. Thorne, C. W. Tilforth 1969-9-6 39267 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  CAS-BOT-BC162755  Chylismia claviformis subsp. cruciformis A. A. Heller 1938-6-23 15211 Lassen On an extensive flat north of Balls Canyon on U.S. Highway #395 Comment
  UC1602277  Chylismia claviformis subsp. cruciformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3399 Lassen Amedee Honey Lake Valley Comment
  SEINET5344414  Chylismia claviformis subsp. cruciformis F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  CHSC42574  Cicuta douglasii Vernon Oswald 1986-7-22 2222 Lassen Hwy 36, 6.0 mi e of the Plumas-Lassen County line. 1524 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
  RSA746510  Cirsium andersonii K. M. Meyer, A. Townesmith 2007-7-21 143 Lassen Lassen National Forest. CA, 1.3 mi. on road 110, off Hwy A21, 1821 Comment
  UCD159575  Cirsium arvense D. S. Park 2011-6-27 311 -2 Lassen East of Westwood. Growing near Willard Creek. Comment
  CDA1124  Cirsium canescens T. C. Fuller 1966-7-22 14981 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
  CDA1128  Cirsium canescens G. D. Barbe 1982-7-13 3881 Lassen Madeline Plain Scattered along Westside Rd. at base of Dry Valley Ridge, 3 mi. n. of Termo- Grasshopper Rd. 0 Comment
  CAS-BOT-BC278012  Cirsium cymosum Peter H. Raven; Otto T. Solbrig 1958-6-17 13303 Lassen 8.0 miles north of Madeline along United States Highway 395 Comment
  CAS-BOT-BC278003  Cirsium cymosum Mrs. H. C. Cantelow 1940-5-31 s.n. Lassen 5 miles east of McArthur, Hy. 299 Comment
  UC1136775  Cirsium cymosum var. cymosum L. R. Short and Wm. Gansberg 1936-7-9 S- 479 Lassen Burgess Spr. Exp. Range Lassen Forest 1807 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
  CAS-BOT-BC278092  Cirsium douglasii var. breweri Peter H. Raven; Otto T. Solbrig 1958-6-17 13280 Lassen Along United States Highway 395, 13.1 miles south of Ravendale Comment
  CDA1262  Cirsium inamoenum T. C. Fuller, R. C. Bechtel, R. Bradley 1981-7-9 20380 Lassen West side of Smoke Creek Reservoir; drainage on east side of road above lake. Comment
  CAS-BOT-BC285579  Cirsium occidentale var. candidissimum John Thomas Howell 1934-7-11 12563 Lassen Eldridge, 10 miles se. of Fall River Mills Comment
  CDA1489  Cirsium ochrocentrum Lee Wheeler 1959-7-23 s.n. Lassen Richmond Rd., about 4 mi. SE of Susanville. (Janesville, SW of Johnstonville.) Comment
  CDA37705  Cirsium ochrocentrum Robin Breckenridge 2006-8-15 s.n. Lassen Madeline Plains, Westside Road, old Basque homestead. 0 Comment
  CDA1521  Cirsium ochrocentrum var. ochrocentrum G. D. Barbe 1982-7-12 3876 Lassen Madeline Plain. 3 mi. north of Termo-Grasshopper Rd., on Westside Rd. at base of Dry Valley Ridge. 0 Comment
  CDA1524  Cirsium ochrocentrum var. ochrocentrum D. Chambers, M. Carstens 1979-8-14 s.n. Lassen Modoc National Forest Upper Windmill Flat and Packwood Reservoir; 12 mi. S of Adin. 0 Comment
  RSA286400  Cirsium undulatum T. C. Fuller 1980-8-5 20311 Lassen North side of road to campground, east shore of Dodge Reservoir, 28 km (17.5 miles) northeast of Ravendale 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
  JEPS88247  Clarkia gracilis subsp. gracilis Vernon H. Oswald and Lowell Ahart 1996-6-17 7792 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead off Hwy. 36, just sw of parking area at Devils Corral Trailhead); Modoc Plateau 1420 Comment
  RSA715985  Clarkia lassenensis L. Ahart, John Dittes 2005-6-2 11951 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4.75 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction 1513 Comment
  JEPS90014  Clarkia purpurea subsp. quadrivulnera Dean Wm. Taylor with Robert A. Price 1988-6-4 9770 Lassen 6 mi e of MacArthur (Fall River Valley along Highway 299 at crossing of Frazer Creek, Pit River Watershed); Fall River Valley, Highway 299 1036 Comment
  CAS-BOT-BC163410  Clarkia purpurea subsp. quadrivulnera H. D. Ripley; R. C. Barneby 1943-6-13 5718 Lassen South of Johnstonville 1325 Comment
  CHSC4775  Clarkia rhomboidea R. Carter 1967-6-27 564 Lassen Ca. 10 yds off S side of Rd. Comment
  JEPS96107  Clarkia rhomboidea Vernon H. Oswald and Lowell Ahart 1996-6-17 7780 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36, n. side Hwy. 36 between trail & hwy. spanning the Susan River); Modoc Plateau, Bizz Johnson Trail 1432 Comment
  RSA122142  Clarkia rhomboidea L. R. Short, Wm. Gansberg 1936-7-3 S- 358 Lassen MDM. Burgess Spr. Exp. Range. Lassen National Forest 1848 Comment
  UC1537615  Clarkia rhomboidea Gordon H. True Jr. 1936-6-26 549 Lassen 2 mi e Eagle Lake (head of creek); Willow Creek 1584 Comment
  UC506933  Clarkia rhomboidea George A. Fischer, Irwin H. Johnson 1933-7-14 F 246 Lassen Lassen Forest 1767 Comment
  CHSC59559  Clarkia stellata Mary Meyer 1980-7-1 Lassen Along road traversing southern end of McCoy Flat. 1645 Comment
  CHSC61223  Clarkia stellata P. V. Caldwell 1972-6-15 225 Lassen Eagle Lake: W face on Black Mtn. 1706 Comment
  RSA122141  Clarkia stellata L. R. Short 1936-6-23 S- 448 Lassen Burgess Spring Exp. Range, Lassen forest 1799 Comment
  RSA0080500  Claytonia lanceolata M. S. Baker 1952-5-23 12429 Lassen Hwy. 36; 0.5 mi. West of Predonyer Pass. 1753 Comment
  UC1483836  Claytonia perfoliata subsp. intermontana G. Schoolcraft 1980-4-8 200 Lassen just w Hwy. 395 (along Shaffer Mountain peak road); Shaffer Mountain 1402 Comment
  CHSC63414  Claytonia rubra subsp. depressa Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6311 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  CHSC64778  Cleome platycarpa Vernon H. Oswald 1995-5-31 6805 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1371 Comment
  JEPS17868  Cleome platycarpa Rimo Bacigalupi with G. T. Robbins 1955-7-21 5430 Lassen 8 mi e U.S. Hwy. 395 (along Smoke Creek Ranch road, se part of Secret Valley); Secret Valley 1402 Comment
  SEINET3153948  Cleome platycarpa J. L. Strother 1970-5-23 951 Lassen About 6 miles N of Honey Lake, at ca. 4200 feet elevation. 1280 Comment
  CAS-BOT-BC32956  Cleomella alata C. C. (Mrs.) Bruce 1898-6-1 2364 a Lassen Shumway Comment
  JEPS17733  Cleomella plocasperma Rimo Bacigalupi with G. T. Robbins 1955-7-21 5426 Lassen Rush Creek s. of Smoke Creek Ranch Rd. (17.5 mi. e. of U.S. 395 & 1.3 mi. w. of Nevada State line); Rush Creek 1353 Comment
  NY242239  Cleomella plocasperma N. H. Holmgren 1978-6-13 8938 Lassen 2.7 km (1.7 mi) northwest of Wendel. 1250 Comment
  UCD150400  Cleomella plocasperma Harry A. George and F. K. 1957-8-15 s.n. Lassen Honey Lake Wildlife Area, Dakin Unit. Comment
  CHSC7757  Collinsia parviflora Beverley J. Wise 1969-4-26 102 Lassen 2 mi. north of Susanville on Hwy 139. 1341 Comment
  JEPS107462  Collinsia parviflora Lowell Ahart, John Dittes 2005-6-1 11858 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
  JEPS17613  Collinsia parviflora Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5406 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley Meadows, s end of Warner Mtns); Warner Mts., Modoc National Forest, Long Valley Meadows 2057 Comment
  RSA0117250  Collinsia parviflora L. Ahart, John Dittes 2005-6-1 11858 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
  UC1023722  Collinsia parviflora Francis W. Pennell 1940-6-9 25752 Lassen 7 mi n of Madeline (Route 395); Route 395 1615 Comment
  UC1143004  Collinsia parviflora August L. Hormay 1934-5-9 Lassen Lassen Nation Forest, Black Mountain Headquarters Black Mountain Headquarters; Lassen Nation Forest, Black Mountain Headquarters 1706 Comment
  HSC68935  Collinsia parviflora Gary Schoolcraft 1979-5-1 15 Lassen Along road between Big Springs and Shearing Corrals 1677 Comment
  UC773850  Collinsia torreyi var. latifolia L. R. Short 1936-6-25 S 455 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1752 Comment
  CHSC7767  Collomia grandiflora Beverley J. Wise 1969-6-1 75 Lassen N.E. city limits of Susanville, on Chestnut, at intersection with Hwy 139. 1310 Comment
  JEPS117587  Collomia grandiflora Lowell Ahart, John Dittes 2010-7-31 17002 Lassen On the north side of the road, about 10 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
  SEINET2445250  Collomia grandiflora Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9502 Lassen Observation Peak, south side of mountain. 18 km (11 mi) airline distance east of Ravendale.; 0 1890 Comment
  UC773904  Collomia grandiflora L. R. Short and J. Warren S- 362 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1844 Comment
  SEINET12318331  Collomia grandiflora Unknown 1978-1 22 Lassen Lower Dry Lakes,SE of Eagle L 1646 Comment
  CHSC23479  Collomia tinctoria Wayne O. Baum 1971-7-5 71 -11 Lassen E. slope of Gallatin Peak. 1981 Comment
  CHSC6200  Collomia tinctoria 1946-6-13 Lassen Eagle Lake. 1584 Comment
  UC1123659  Collomia tinctoria A. Simontacchi 898 Lassen 2.6 mi s Ladder Butte; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1609177  Collomia tinctoria Vernon H. Oswald and Lowell Ahart 1993-6-28 5597 Lassen Harvey Valley Rd. (33N02) 2.0 mi n Hwy 44 (between Grays Valley and Harvey Valley, e of Poison Lake) 1734 Comment
  JEPS121290  Conium maculatum Lowell Ahart, John Dittes 2013-7-23 18901 Lassen W side of the road levee, about 80 yards W of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC71887  Consolida ajacis Vernon H. Oswald; Lowell Ahart 1998-9-8 9584 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.). Between the road and the marsh. 1258 Comment
  JEPS124868 Image available Convolvulus arvensis Laurel Loeblich 1964-6-30 56 Lassen 3 mi. north of Hallelujah Junction (highways 40 & 395) on 395. Comment
  JEPS107824  Conyza canadensis Lowell Ahart, John Dittes 2005-6-2 11974 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
  POM33281  Conyza canadensis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC31437  Conyza canadensis J. Burtt Davy Jun 17 1897-Jun 24 1897 3393 Lassen borders of hot springs Amedee; Honey Lake Valley Comment
  JEPS17408  Cordylanthus kingii subsp. helleri Rimo Bacigalupi with G. T. Robbins 1955-7-21 5427 Lassen s Smoke Creek Ranch Rd. (1.3 mi w of Nevada Line, 17.5 mi e of US Hwy 395); draingage of Rush Creek 1341 Comment
  UC762620  Cordylanthus ramosus R. F. Hoover 1940-10-5 4678 Lassen Secret Valley Comment
  CHSC83603  Crepis acuminata L. P. Janeway 2001-6-28 7234 Lassen High Cascade Range. Southwest flank of Cone Mountain, 0.5 km southwest of the summit; along Road 33N41Y 0.5 km southeast of Road 33N41YD. 1955 Comment
  POM17703  Crepis acuminata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC581223  Crepis acuminata G. L. Stebbins Jr. and J. A. Jenkins 1936-6-7 1763 Lassen ne slope of ridge near summit east of Red Rock 1818 Comment
  UCR18726  Crepis acuminata Frank C. Vasek 1975-7-11 750711- 12 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CAS-BOT-BC290393  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2313 Lassen Black Mountain about a mile below the summit 1940 Comment
  POM260004  Crepis acuminata C. L. Hitchcock 1940-5-26 6621 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CHSC27597  Crepis bakeri N. E. Heiken 1978-6-28 58 Lassen E of Eagle L., at Lower Dry L. 1645 Comment
  POM230908  Crepis intermedia G. Ledyard Stebbins, J. A. Jenkins 1937-7-10 2296 Lassen Crest of range head of Stony Ridge, west of Milford 1951 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
  UC581219  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2316 Lassen sw-facing slope about a mi below summit; Black Mountain 1940 Comment
  UC581249  Crepis modocensis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2257 Lassen bare summit ridge and ridges sw Diamond Mt. (s of Susanville, Plumas and Lassen Co.) Comment
  CAS-BOT-BC291584  Crepis modocensis subsp. subacaulis G. L. Stebbins; J. A. Jenkins 1937-7-10 2278 Lassen Slope of Diamond Mt. 2286 Comment
  JEPS36426  Crepis monticola W. L. Jepson 1910-6-10 4108 Lassen King Creek 1524 Comment
  UC581275  Crepis monticola G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2332 Lassen Burgess Springs Experimental Range 1700 Comment
  UC76004  Crepis monticola Milo S. Baker July, 1894 Lassen near Bieber; Big Valley, Vicker's Ranch Comment
  UC1136842  Crepis occidentalis George A. Fischer and Irwin H. Johnson 1933-7-14 F 271 Lassen Lassen <National> Forest 1752 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
  UC581290  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2302 Lassen w Milford (crest or range head of ridge); Stony Ridge 1930 Comment
  CAS-BOT-BC376489  Crepis occidentalis subsp. conjuncta G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2319 Lassen Black Mountain about a mile below the summit 1940 Comment
  UC581316  Crepis occidentalis subsp. costata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2221 Lassen 6 mi s Ravensdale 1676 Comment
  SEINET2142793 Image available Crepis occidentalis subsp. occidentalis Noel H. Holmgren, Holmgren, Patricia K. 1978-6-11 8929 Lassen upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale 1700 Comment
  UC581289  Crepis occidentalis subsp. occidentalis E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1748 Lassen nw-facing slope of ridge e Red Rock 1600 Comment
  JEPS117488  Crepis occidentalis subsp. pumila Lowell Ahart, John Dittes 2010-7-31 16982 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
  CAS-BOT-BC290823  Crepis occidentalis subsp. pumila Elmer I. Applegate 1934-5-4 8915 Lassen South of Secret Valley Comment
  POM203850  Crepis occidentalis subsp. pumila J. T. Howell 1934-6-10 11872 Lassen Janesville Comment
  CHSC5206  Crepis pleurocarpa 1944-6-28 Lassen Eagle Lake. 1584 Comment
  UC23225  Cressa truxillensis J. Burtt Davy Jun 17 1897-Jun 24 1897 3395 Lassen Honey Lake Valley, Amedee Comment
  CAS-BOT-BC299713  Crocidium Louella Bass 1973-4-22 23 Lassen Elysian Valley, Sierra Nevada 1325 Comment
  HSC63831  Crypsis vaginiflora Teresa Prendusi 1980-8-27 Lassen Reservoir just NE of Susanville 1280 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
  CHSC57350  Cryptantha K. R. Stern 1974-6-26 5860 Lassen Ditch bank beside railroad track, e side of Poison Lake Rd. to Pittville, ca. 1.8 mi nw of intersection with Hwy. 44. Comment
  CAS-BOT-BC189326  Cryptantha circumscissa John Thomas Howell 1934-6-10 11852 Lassen 4 miles S of Omira Comment
  CHSC106681  Cryptantha circumscissa B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CHSC5014  Cryptantha circumscissa L. G. Bennett 1967-7-5 111 Lassen Immediate vicinity of Eagle Lake Biological Station, Eagle Lake. 1554 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
  JEPS94827  Cryptantha circumscissa Vernon H. Oswald and Lowell Ahart 1998-5-22 9135 Lassen 3.5 mi n of Doyle (Fort Sage Road 2.3 mi n of Hackstaff Road); Fort Sage Road 1341 Comment
  POM368344  Cryptantha circumscissa Christopher Davidson 1975-6-7 2761 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UC577869  Cryptantha circumscissa E. Sawyer 1935-6-27 220 Lassen Long Valley Sierraville Quad. 1310 Comment
  UCD55276  Cryptantha circumscissa Ellen Dean 2006-5-15 3091 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. 1245 Comment
  SDSU20525  Cryptantha echinella Nuri Benet-Pierce, John P. Pierce 2012-7-14 526 Lassen Diamond Mountain. 2023 Comment
  POM73232  Cryptantha hendersonii Marcus E. Jones 1897-6-26 6900 Lassen Susanville, Perkin s Ranch. 1463 Comment
  CHSC75468  Cryptantha humilis Vernon H. Oswald; Lowell Ahart 1999-6-19 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. 1353 Comment
  POM46564  Cryptantha humilis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1094380  Cryptantha intermedia R. C. Bacigalupi with S. Galen Smith 1957-6-28 5993 Lassen 6.0 mi n Madeline (on Highway 395) 1676 Comment
  JEPS124572 Image available Cryptantha intermedia var. grandiflora S. Hardinghaus 1967-7-11 167715 -114 Lassen 6 mi. S. of Eagle Lake where meets Hw 139 at west shore, on Hwy 139. Comment
  CDA40508  Cryptantha muricata Gary Schoolcraft 2000-6-19 2903 Lassen West of Cold Spring Velley. Comment
  JEPS103177  Cryptantha muricata G. Schoolcraft 2000-6-19 2903 Lassen West of Cold Springs Valley 1706 Comment
  UC507028  Cryptantha simulans George A. Fischer and Irwin H. Johnson 1933-7-14 F- 260 Lassen Lassen Forest 1783 Comment
  CHSC27925  Cryptantha torreyana M. S. Taylor 1974-7-10 280 Lassen In meadow, ca. 1/2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 12 mi nw of Susanville. 1524 Comment
  CHSC77202  Cryptantha torreyana G. Schoolcraft 1997-8-6 2653 Lassen S side of Gold Run Rd. 1889 Comment
  UC1587053  Cryptantha torreyana G. Schoolcraft 1991-7-30 2193 Lassen e side Widow Mountain 1889 Comment
  UC526168  Cryptantha torreyana John Thomas Howell 1934-7-10 12546 Lassen Long's Well Comment
  SEINET8191424  Cryptantha watsonii F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  CHSC23497  Cuscuta Wayne O. Baum 1971-7-14 71 -63 Lassen Gallatin Peak. 2011 Comment
  OBI75868  Cuscuta occidentalis Anthony Baniaga 2011-8-9 492 Lassen Lassen Natl Forest. About 1/2 mi W of Griffith Hill, S of 30N21. Swain Mtn quad T30N R8E sec 8 NW of NW 1958 Comment
  CAS-BOT-BC39681  Cusickiella douglasii G. Schoolcraft 1988-6-7 1809 Lassen About 14 miles northeast of Ravendale. 1737 Comment
  UC22937  Cycladenia humilis var. humilis Milo S. Baker 1894-7-30 Lassen Silver Lake Comment
  SBBG50491  Cynoglossum occidentale J. T. Howell 1974-7-9 50483 Lassen between Susanville and SW end of Eagle Lake 1828 Comment
  POM119128  Damasonium californicum Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UC1130604  Damasonium californicum A. Simontacchi 1940-7-4 914 Lassen s. shore Government Lake; Lassen Nat'l Forest, Halls Flat Quad., Government Lake Comment
  JEPS124717 Image available Damasonium californicum M. L. Wheelis 1964-6-30 137 Lassen Second bridge (to the north) between Bieber and New Bieber. Comment
  SEINET3828852  Damasonium californicum R. F. Thorne, Larry E. De Buhr 1975-1 46995 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 iles south of Modoc county line. 1615 Comment
  UC1024653  Danthonia californica Leo Whitney 1933-8-3 2201 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  POM172479  Danthonia californica var. americana Franklin P. Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  HSC41628  Deinandra lobbii Barbara Kelly 1977-8-10 581 Lassen Along Adin Susanville Road, mileage marker 23.0, S of Adin Comment
  CAS-BOT-BC1424  Delphinium andersonii David Daniels Keck; J. Clausen 1935-6-24 3748 Lassen 2 mi. S of Ravendale 1464 Comment
  JEPS95074  Delphinium andersonii Vernon H. Oswald and Lowell Ahart 1997-5-27 8511 Lassen n of Susanville (on Forest Rte 38N04 between Hwy 139 near Willow Creek Guard Station and Coyote Flat, 0.3 mi e of Hwy 139); Forest Rte 38N04 1560 Comment
  UC1136878  Delphinium andersonii L. R. Short 1936-5-12 S- 347 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1834 Comment
  UC1583981  Delphinium andersonii G. Schoolcraft 1990-6-12 2090 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC1924575  Delphinium andersonii Debra Valov 2006-5-29 2006026 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1275 Comment
  CAS-BOT-BC1414  Delphinium andersonii subsp. cognatum David Daniels Keck; J. Clausen 1935-6-24 3748 Lassen 2 mi. S. of Ravendale 1464 Comment
  RSA0005300  Delphinium armeniacum A. A. Heller 1938-6-4 15149 Lassen 1 mile east of Fredonyer Pass on hwy 36. 1707 Comment
  SEINET10675839 Image available Delphinium nudicaule A. Arthur Heller 1938-6-4 Heller 15149 Lassen More or less shaded gravelly slope in the yellow pine forest one mile east of Fredonyer Pass on Highway #36, Arid Transition Life Zone. 1707 Comment
  NY492431  Delphinium stachydeum G. Schoolcraft 1983-8-3 1123 Lassen About 2 miles south of Holbrook Canyon 1828.8 Comment
  CAS-BOT-BC194266  Deschampsia cespitosa subsp. cespitosa M. S. Baker; F. Nutting 1894-7-21 s.n. Lassen Eagle Lake Comment
  CHSC113927  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2014-8-20 19719 Lassen All over the meadow, 0.8 mile west of Forest Road 32N22 (Westwood Logging Road), about 4.2 miles southeast (by road) from Bogard Rest Area on the south side of Highway 44. 1894 Comment
  JEPS28309  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-8-9 1008 Lassen E. Fork of Hat Creek near Summit Lake Ranger Station; Lassen Volcanic Nat'l Park, E. Fork Hat Creek 2026 Comment
  UC1037093  Deschampsia cespitosa subsp. cespitosa Leo Whitney 1934-7-15 2211 Lassen ca. 15 mi. w. Eagle lake (Crater Lake, Lassen Nat'l Forest); Lassen Nat'l Forest, Crater Lake 2133 Comment
  JEPS120871  Deschampsia danthonioides Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18754 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
  UC1024884  Deschampsia danthonioides Leo Whitney 1935-5-26 3137 Lassen 10 mi. e. Adin (Ash Creek); Ash Creek Comment
  UC1100291  Deschampsia danthonioides Malcolm A. Nobs and S. Galen Smith 1949-7-21 1059 Lassen 4 mi. n. Madeline Comment
  SEINET10524169  Deschampsia danthonioides R. Ondricek 1978-7-15 Ondricek 102 Lassen In dried mud where the spring arises above the dam at Murrers Upper Meadow. T32N, R11E, e edge of Sec. 26. in the Fredonyer Peak Quadrangle, 15'. 1548 Comment
  JEPS100347  Descurainia incana Dean W. Taylor 2001-6-28 17817 Lassen Diamond Mountains, Crystal Peak, along ridgeline at the summit 2377 Comment
  UC1609092  Descurainia incisa subsp. filipes Vernon H. Oswald and Lowell Ahart 1993-7-8 5656 Lassen ne edge Poison Lake (1.9 mi n of Hwy 44, Pittville Rd (Lassen 111, 36N01), ridge between railroad and lake) 1709 Comment
  CHSC29947  Descurainia pinnata Robin L. Ondricek 1978-6-19 62 Lassen Around Eagle Lake Field Station. 1554 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
  UC773932  Descurainia pinnata L. R. Short and W. McNulty 1936-6-15 S- 435 Lassen Burgess Spring Experiment Range; Lassen Forest 1833 Comment
  RSA647568  Descurainia pinnata Marion P. Harthill 1971-6-21 228 Lassen Rovendale. Comment
  CHSC48325  Descurainia pinnata subsp. halictorum Vernon Oswald 1986-5-28 2053 Lassen Rd. 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  CHSC57356  Descurainia sophia B. G. Clark 1987-4-15 22 Lassen Lassen or Inyo counties. Top of knoll 1/4 mi sw of Lassen College adjacent and west of hwy 139. Comment
  POM109921  Dichelostemma multiflorum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin s Ranch. 1463 Comment
  CHSC86974  Dieteria canescens var. shastensis L. P. Janeway 2001-6-20 7202 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
  JEPS87533  Dieteria canescens var. shastensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5596 Lassen Harvey Valley Rd. (33N02) 2.0 mi n Hwy 44 (between Grays Valley and Harvey Valley, e of Poison Lake) 1734 Comment
  UC1119608  Dieteria canescens var. shastensis H. S. Yates 1936-8-11 6077 Lassen near Johnstonville; Susanville Quad. Comment
  CAS-BOT-BC153679  Diplacus mephiticus H. D. Ripley; R. C. Barneby 1943-6-13 5698 Lassen South of Milford 1569 Comment
  CHSC4812  Diplacus mephiticus R. Carter 1967-7-7 577 Lassen Collected outside dining hall, n side, 15 yds from building. 1524 Comment
  OBI76990  Diplacus mephiticus Anthony Baniaga 2011-7-5 418 Lassen Lassen Natl Forest. E of Willard Crk. Fredonyer Pass quad. T29N R10E sec 25 NE of NW 1503 Comment
  SEINET13714183  Diplacus mephiticus M. J. Williams 1974-7-26 74 -L-35 Lassen S of Hwy 70, 2 miles W of Hallelujah Junction. 1494 Comment
  CAS-BOT-BC151434  Diplacus nanus Louella Bass 1977-6-12 77 -1&2 Lassen Elysian Valley 1325 Comment
  CHSC64898  Diplacus nanus Vernon H. Oswald 1995-6-26 6936 Lassen Modoc Plateau. Gravel pit on the e side of Ash Valley Rd. (Lassen 527) 0.2 mi n of Spooner Rd. in Ash Valley. 1542 Comment
  CDA31696  Distichlis spicata E. E. Fix, Agric. Comm. Sep 1951 Lassen 0 Comment
  CHSC7693  Distichlis spicata Beverley J. Wise 1969-5-23 129 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd 320. 1249 Comment
  UC60743  Distichlis spicata J. Burtt Davy June 17-24 1897 Lassen Amedee, Honey Lake Valley Comment
  CHSC4945  Dodecatheon alpinum R. Carter 1967-6-23 549 Lassen 25 yds w of dam in Murrer's Meadow. Along rd to Murrer's Meadow. 1584 Comment
  HSC17851  Dodecatheon alpinum Jim Vaughn 1956-8-11 Lassen Horseshoe Lake, Mt. Lassen National Park 1982 Comment
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Apr 28 2013
  POM76750  Dodecatheon alpinum subsp. majus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  CHSC23459  Downingia K. R. Stern 1973-4-18 5853 Lassen Drying vernal pool area, ca. 0.2 mi n of Hwy 44 on Pittsville Rd. Comment
  CHSC60886  Downingia bacigalupii Vernon H. Owald; Lowell Ahart 1993-7-8 5677 Lassen N. side of 34N12 just E of the railroad at Halls Flat Well, ca. 11 mi (air) NNW of Poison Lake. 1737 Comment
  CHSC79144  Downingia bacigalupii Beecher Crampton 1970-6-26 8637 a Lassen Ca. 5 miles west of Susanville. Comment
  JEPS117578  Downingia bacigalupii Lowell Ahart, John Dittes 2010-7-31 17013 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
  RSA340002  Downingia bacigalupii Noel Holmgren, Patricia K. Holmgren 1980-7-3 9482 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  UCR163269  Downingia bacigalupii Jim Andre 1993-6-29 1408 B Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  CHSC23491  Downingia bicornuta K. R. Stern 1974-6-26 5855 Lassen Ditch bank beside railroad track, e side of Poison Lake Rd. to Pittville, 1.8 mi nw of intersection with Hwy. 44. Comment
  JEPS22793  Downingia bicornuta var. bicornuta August L. Hormay 1934-5-15 Lassen 1 mi ne Halls Flat Railroad Station (on the Keddie-Nubieber (freight) branch of the W.P.R.R.) 1554 Comment
  JEPS58978  Downingia bicornuta var. bicornuta Wm. Anderson 1960-6-16 Lassen 0.25 mi s Mapes Ranch; Honey Lake Valley Comment
  UC1037336  Downingia bicornuta var. bicornuta Leo Whitney 1933-8-20 1693 Lassen ca 25 mi w upper end of Eagle Lake (near Halls Flat); Lassen National Forest 1737 Comment
  UC1536877  Downingia elegans G. H. True 1936-6-25 527 Lassen Harvey Valley 1706 Comment
  UC1520663  Downingia insignis Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9482 Lassen 4.6 mi s Ravendale (U.S. Highway 395) 1615 Comment
  UCR163273  Downingia insignis Jim Andre 1993-6-29 1410 Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  HSC63957  Downingia insignis Teresa Prendusi 1980-7-1 1124 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  SEINET12329647  Downingia insignis N. H. Holmgren, Holmgren, P. K. 1980-1 9482 Lassen U.S. Highway 395, 7.4 km (4.6 mi.) S of Ravendale, T33N, R15E, S6 1620 Comment
  SJSU3581  Downingia insignis P. L. Billings 1965-7-13 76 Lassen near Nubieber 1274 Comment
  CAS-BOT-BC266471  Downingia laeta Wm. Anderson 1960-6-16 s.n. Lassen Along county road 0.25 mile S of Mapes Ranch, Honey Lake Valley Comment
  SEINET8039620  Downingia laeta G. Schoolcraft 1995-6-6 2493 Lassen Laver Spring. 1585 Comment
  CAS-BOT-BC42077  Draba aureola Eben McMillan 1968-6-28 140 -1 Lassen South slope of Mount Lassen. Comment
  OBI78908  Draba verna Anthony Baniaga 2011-6-7 313 Lassen Lassen National Forest. Northwest area of Grays Valley, just South of intersection of 33N11 and 32N83Y. Poison Lake quadrangle. 1747 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
  CHSC61140  Draba verna var. aestivalis Vernon H. Oswald; Lowell Ahart 1993-5-12 5391 Lassen Butte Lake Rd., 1.4 mi S of Hwy. 44, between Old Station and Poison Lake. Along the road. 1652 Comment
  CHSC96701  Drosera anglica Gordon Leppig; J. Cromwell 1997-7-27 609 Lassen Modoc National Forest, Blue Lake Ranch. Peatland i ... Field redacted by CHSC, contact the data manager for more information 1970 Comment
  SEINET11910532  Drymocallis glandulosa Unknown 1978-1 11 Lassen E side of Mahogany L., S of Eagle L. 2060 Comment
  CAS-BOT-BC159343  Drymocallis lactea var. lactea John Thomas Howell; Gordon H. True 1973-8-1 50224 Lassen East slope of Diamond Range south of Susanville - Sierra Nevada 2133 Comment
  CHSC23710  Drymocallis lactea var. lactea Robert Smallwood 1970-6-27 129 Lassen North edge of Dean's Meadow. Comment
  HSC4373  Dysphania ambrosioides M. T. Milligan 1964-8-6 204 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CHSC116194  Elatine Lowell Ahart; John Dittes 2015-7-13 20294 Lassen 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
  UCR227660  Elatine R. F. Thorne, Larry E. DeBuhr 1975-8-22 47213 Lassen Modoc Plateau, Hwy 395, c. 5 mi north of Madeline [at Smith Reservoir] and c. 5.5 mi south of Modoc Co. line 1616 Comment
  CHSC116200  Elatine californica Lowell Ahart; John Dittes 2015-7-13 20298 Lassen 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
  RSA252456  Elatine gracilis R. F. Thorne, C. W. Tilforth, K. Thorne 1969-9-5 39135 Lassen Said Valley Reservoir. Comment
  CHSC77256  Eleocharis macrostachya G. Schoolcraft 1995-6-27 2499 Lassen Cherry Creek. 1524 Comment
  HSC95296  Eleocharis suksdorfiana Gordon Leppig 1998-7-13 968 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC96717  Elodea nuttallii Gordon Leppig 1998-7-13 970 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. Submersed near creek. 1970 Comment
  UCD62904  Elymus X saundersii Lester J. Berry 1960-7-8 Lassen Burgess Springs Road, floor of Harvey Valley, ca. 7 miles S of Black's Mtn. Exper. Station, USDA. Comment
  CHSC117535  Elymus caput-medusae Lowell Ahart; John Dittes 2016-7-13 21145 Lassen Scattered along the west edge of the pond, 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
  JEPS127354  Elymus caput-medusae Lowell Ahart, John Dittes 2016-7-13 21145 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
  SEINET10521751  Elymus cinereus var. pubens Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 888 Lassen 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. Comment
  JEPS128418  Elymus elymoides Jennifer Mueller 2017-7-18 CA 320 -193 Lassen Near Long Springs on Cold Springs Mountain. Comment
  UCD61421  Elymus elymoides L. D. Whitney 1935-6-27 Lassen Squaw Valley. Comment
  UC53733  Elymus elymoides subsp. elymoides J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  CHSC118823  Elymus elymoides var. californicus L. P. Janeway; B Castro 2015-6-5 11762 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
  CHSC111249  Elymus elymoides var. elymoides L. P. Janeway; B. Castro 2012-7-3 10943 Lassen Modoc Plateau. Near top of Shaffer Mountain, southeast-facing slope, steep and very rocky with lots of outcrops of hard dark volcanic rock. 2012 Comment
  CHSC112797  Elymus repens Lowell Ahart; John Dittes 2013-7-23 18894 Lassen About 20 feet southwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC506972  Elymus trachycaulus George A. Fischer and Irwin H. Johnson 1933-7-12 F- 230 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  CHSC77262  Elymus trachycaulus subsp. trachycaulus G. Schoolcraft 1994-7-6 2444 Lassen About 2 miles west of Boot Lake. 2103 Comment
  JEPS123855  Elymus trachycaulus subsp. trachycaulus Lowell Ahart, John Dittes 2015-7-14 20332 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  SEINET12755568  Elymus triticoides F. H. Hillman 1897-7-12 s.n. Lassen Chat. Comment
  CHSC32865  Ephedra viridis J. S. White 1980-4-14 124 Lassen 3 mi ne of Wendel. 1371 Comment
  JEPS94703  Ephedra viridis Vernon H. Oswald and Lowell Ahart 1998-5-22 9103 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.5 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1371 Comment
  LA6840  Ephedra viridis Carl Epling; William Robison 1935-7-15 sn Lassen Janesville Comment
  RSA252401  Epilobium brachycarpum Robert F. Thorne, C. W. Tilforth 1969-9-6 39263 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  UC1122562  Epilobium brachycarpum A. Simontacchi 1940-6-13 852 Lassen 3.3 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC113081  Epilobium campestre Lowell Ahart; John Dittes 2013-7-22 18850 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
  CHSC27715  Epilobium campestre Robert A. Schlising 1978-7-6 3310 Lassen Dry Lake, SE of Eagle Lake. 1645 Comment
  UC1583987  Epilobium ciliatum subsp. ciliatum G. Schoolcraft 1990-7-11 2108 Lassen n Moon Lake (at reservoir edge); McCabe Spring 1669 Comment
  UC1567379  Epilobium densiflorum G. Schoolcraft 1989-7-18 1984 Lassen s Clark's Valley Rd. (near Box Spring) 1813 Comment
  CHSC77220  Epilobium oregonense G. Schoolcraft 1993-7-20 2330 Lassen About 1 mile s. of Boot Lake. Along creek. 1950 Comment
  POM46398  Epilobium oregonense Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  SEINET194973  Epilobium pallidum A. A. Heller 1938-7-28 15295 Lassen Edge of swamp about mile east of Westwood 1524 Comment
  RSA123008  Epilobium paniculatum L. R. Short, Wm. Gansberg 1936-8-11 S- 493 Lassen Lassen Forest, Burgess Spr. Exp. Range 1747 Comment
  JEPS127270  Epilobium torreyi Lowell Ahart, John Dittes 2016-7-13 21126 Lassen 60 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
  CHSC12494  Equisetum arvense Carol Weld 1969-6-26 46 Lassen 7.8 miles S. W. of Eagle Lake Field Station. 1584 Comment
  CAS-BOT-BC57307  Equisetum laevigatum John Thomas Howell 1974-7-8 50473 Lassen Susanville 1295 Comment
  RSA719899  Equisetum laevigatum Michael A. Vincent, K. Levings 2006-7-29 12905 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  CHSC76105  Eragrostis cilianensis Lowell Ahart; Vernon H. Oswald 1999-9-13 8229 Lassen Along the north side of Mapes Road, about 200 yards east of Lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 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
  SBBG115768  Eragrostis mexicana subsp. virescens J. T. Howell 1976-7-19 51943 Lassen Susanville 1296 Comment
  CDA34254  Eragrostis pectinacea var. pectinacea L. Ahart, J. Dittes 2010-8-31 17092 Lassen On the west side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, and about 7.0 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC174119  Eremogone aculeata B. J. Hammerly 1941-6-20 50 Lassen 8 mi. S.-E. of Likely on Blue Lake road 1676 Comment
  CHSC4266  Eremogone congesta K. R. Stern 1967-6-24 2422 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC4879  Eremogone congesta R. Carter 1967-6-23 544 Lassen Growing ca. 5 yds. off N side road. Comment
  SBBG69966  Eremogone congesta S. W. Hutchinson -Jun-1925 69 Lassen Eagle Lake 1554 Comment
  RSA0045087  Eremogone congesta Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC174199  Eremogone congesta var. congesta L. G. Bennett 1967-6-24 33 Lassen 0.5 miles from start of road 5.19 towards Murrers Meadow near Eagle Lake 1493 Comment
  CHSC89729  Eremogone congesta var. congesta L. P. Janeway 2004-6-26 8165 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  CHSC91525  Eremogone congesta var. congesta L. P. Janeway 2005-7-3 8457 Lassen High Cascade Range. Near large shallow stock pond 0.3 km west of Road 35N38 (road to Blacks Ridge Lookout Tower), 1.9 road km south or Road 22; 2.3 air km northwest of the lookout. 1580 Comment
  CHSC5228  Eremogone congesta var. simulans J. B. Kimsey 1946-6-17 Lassen Mt. Fredonyer. 2421 Comment
  CHSC111269  Eremogone congesta var. subcongesta L. P. Janeway 2012-7-3 10941 Lassen Modoc Plateau. Near top of Shaffer Mountain, rocky outcrops, west-northwest facing and very rocky with lots of outcrops of hard dark volcanic rock. 2032 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
  SEINET12875575 Image available Eremogone congesta var. subcongesta John Thomas Howell 1977-1 52401 Lassen North end of Eagle Lake 1585 Comment
  CAS-BOT-BC160000  Eremothera boothii subsp. alyssoides Elmer I. Applegate 1934-5-4 8918 Lassen Secret Valley Comment
  CAS-BOT-BC160001  Eremothera boothii subsp. alyssoides David D. Keck; J. Clausen 1935-6-24 3741 Lassen 2 mi. S. of Ravendale 1464 Comment
  SEINET4132785  Eremothera boothii subsp. alyssoides A. Tiehm 1980-1 5754 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  CHSC100870  Eriastrum signatum L. P. Janeway 2008-8-2 9533 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Ranch Road 1.8 km west of the CA-NV line. 1349 Comment
  CHSC6201  Eriastrum signatum M. West 1946-7-2 Lassen Spalding's, Eagle Lake. 1554 Comment
  CAS-BOT-BC515174  Eriastrum signatum L. S. Smith 1937-7-1 2783 Lassen Plumas Forest, Honey Lake Valley N of highway near E end of the lake 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
  RSA0124144  Eriastrum signatum R. F. Thorne, C. W. Tilforth 1969-9-6 39264 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  RSA0125157  Eriastrum signatum Reino Alava 1957-7-5 1138 Lassen Along Highway no. 395, 4.25 miles S of Ravendale. Comment
  CAS-BOT-BC515234  Eriastrum wilcoxii Rimo Bacigalupi; G. T. Robbins 1955-7-21 5418 Lassen Southern edge of Secret Valley, along the Smoke Creek road, 6.8 mi E of US Hwy 395 Comment
  CAS-BOT-BC286606  Ericameria bloomeri E. K. Balls; P. C. Everett 1952-10-9 18134 Lassen About Plumas-Lassen county line, Hwy 89, east of Lake Almanor 1219 Comment
  CAS-BOT-BC286607  Ericameria bloomeri Gary Schoolcraft 1984-8-21 1367 Lassen Eastern slopes of Fredonyer Mtn. 33-12-35 2072 Comment
  CHSC349  Ericameria bloomeri 1944-7-31 Lassen Westwood. 1549 Comment
  CHSC12490  Ericameria nauseosa Carol Weld 1969-6-19 59 Lassen Ca 150 yd N.W. of Eagle Lake Field Station. 1554 Comment
  CAS-BOT-BC298182  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile E of Termo 1645 Comment
  OBI5655  Ericameria nauseosa var. oreophila Carl B. Wolf 1931-9-6 2403 Lassen Honey Lake Valley; 3 mi from Wendel on the road to Janesville 1219 Comment
  SJSU3012  Ericameria nauseosa var. oreophila J. W. Tilden 1967-8-23 1771 Lassen Litchfield, southeastern Lassen County Comment
  CAS-BOT-BC294185  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50696 Lassen South and southeast of Diamond Mt. 2286 Comment
  HSC68556  Ericameria nauseosa var. speciosa Gary Schoolcraft 1980-8-10 359 Lassen Along Post Camp Rd. N of Shinn Peaks 1890 Comment
  JEPS103188  Erigeron G. Schoolcraft 2000-6-12 2901 Lassen West of Cold Springs Reservoir 1676 Comment
  POM33280  Erigeron aphanactis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  SEINET201631  Erigeron aphanactis A. Cronquist, AH Holmgren 1959-6-17 8466 Lassen 50 mi SE of Susanville 1372 Comment
  CAS-BOT-BC293526  Erigeron aphanactis var. aphanactis Margaret Williams 1974-7-27 74 -L-49 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  SEINET8079426 Image available Erigeron aphanactis var. aphanactis M. J. Williams 1974-7-29 74- 1 -49 Lassen 2 mi. west of Hallelujah Junction, south of Hwy 70 1494 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
  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
  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-BC294492  Erigeron bloomeri var. bloomeri John Thomas Howell 1934-6-10 11867 Lassen Honey Lake Valley, 37 miles s. of Susanville Comment
  JEPS117490  Erigeron bloomeri var. bloomeri Lowell Ahart, John Dittes 2010-7-31 17010 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
  UC506989  Erigeron bloomeri var. bloomeri George A. Fischer and Irwin H. Johnson 1933-7-12 F 217 Lassen Lassen National Forest 1722 Comment
  CHSC99112  Erigeron divergens Lowell Ahart; John Dittes 2008-6-20 14965 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
  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
  UC87555  Erigeron divergens T. S. Brandegee 1892-6-28 Lassen Janesville Comment
  CAS-BOT-BC296899  Erigeron eatonii var. eatonii A. M. Vollmer; L. Beane 1953-7-1 50 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CAS-BOT-BC300374  Erigeron eatonii var. plantagineus Alice Eastwood; John Thomas Howell 1940-6-11 7980 Lassen Big Valley Mts. Comment
  POM32999  Erigeron eatonii var. plantagineus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  SBBG8127  Erigeron eatonii var. plantagineus H. and M. Dearing 1938-6-30 2233 Lassen N of Susanville [Hwy 44] Comment
  UC1136837  Erigeron eatonii var. plantagineus L. R. Short 1936-5-22 S- 350 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1859 Comment
  RSA739690  Erigeron filifolius var. filifolius John Dittes, Scott Chamberlain 2004-6-28 s.n. Lassen Modoc Plateau; Long Valley; ca. 4.6 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 3.2 air-miles west of Hwy 395, ca. 0.3 air-miles east of Plumas County line. 1512 Comment
  CHSC65089  Erigeron inornatus var. calidipetris Vernon H. Oswald; Lowell Ahart 1995-7-24 7146 Lassen Cascade Range. Forest Road 31N25 0.5 mi E of Forest Route 10, near the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. Edge of the road. 1905 Comment
  CAS-BOT-BC295472  Erigeron lassenianus var. lassenianus Parkison 1916-6-21 40 Lassen Lassen National Forest. Near Patterson Cabin 1706 Comment
  CHSC64839  Erigeron linearis Vernon H. Oswald 1995-6-26 6929 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 9.5 mi w of Madeline, on the s side of the reservoir at Fleming Sheep Camp. 1621 Comment
  CHSC67165  Erigeron linearis James D. Jokerst 1991-5-29 3314 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 ca. 0.75 N of the N end of Eagle Lake, E of the highway +/- 500 ft on top of ridge N of a drainage. 1584 Comment
  HSC63962  Erigeron linearis Teresa Prendusi 1980-4-30 Lassen Upper slopes of Shaffer Mtn. 1738 Comment
  JEPS117505  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
  JEPS107464  Erigeron pumilus var. intermedius Lowell Ahart, John Dittes 2005-6-1 11853 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
  UC1609097  Erigeron pumilus var. intermedius Vernon H. Oswald and Lowell Ahart 1993-6-28 5578 Lassen Harvey Valley Rd (33N02) 0.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1749 Comment
  UC506996  Erigeron pumilus var. intermedius George A. Fischer and Irwin H. Johnson 1933-7-12 F 209 Lassen Grass Valley 1700 Comment
  UC76008  Erigeron pumilus var. intermedius Milo S. Baker 1890-1 Lassen Honey Lake Valley, near Milford; Honey lake Valley Comment
  CAS-BOT-BC300119  Erigeron pumilus var. intermedius Clare B. Hardham 1961-6-17 7504 Lassen Sierra Nevada Mountains. Baxter Creek 1676 Comment
  SEINET530701  Eriogonum baileyi var. baileyi Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  UC762657  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-5 4672 Lassen Pass 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
  NY242502  Eriogonum collinum G. Schoolcraft 1983-6-28 1021 Lassen East side of Mud Flat. 31-15-26 1341.1 Comment
  NY242507  Eriogonum collinum R. F. Hoover 1940-9-29 4645 Lassen Between Shaffer Mountain and Warren Peak, in low pass. Comment
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Jul 1 2013
  POM253227  Eriogonum collinum A. A. Heller 1938-6-23 s.n. Lassen Midway between Mapes and Secret Valley on Hwy 395. 1372 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
  UC1094378  Eriogonum collinum R. C. Bacigalupi with S. Galen Smith 1957-6-28 6009 Lassen 11.5 mi s Termo 1645 Comment
  UC1537298  Eriogonum collinum Gordon H. True Jr. 1938-9-9 912 Lassen Madeline Plains 1524 Comment
  JEPS114757  Eriogonum douglasii var. meridionale Lowell Ahart, John Dittes 2008-6-19 14895 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
  JEPS94457  Eriogonum douglasii var. meridionale Vernon Oswald and Lowell Ahart 1997-6-24 8639 Lassen s of Susanville (near the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  RSA766386  Eriogonum eximium Susan Hutchinson 1929-12 857 Lassen Desert slope of Sierra Nevada, Lassen. 1220 Comment
  SEINET5330338  Eriogonum inflatum var. inflatum F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  CAS-BOT-BC263046  Eriogonum maculatum Robert F. Hoover 1940-10-5 4670 Lassen Wendel Comment
  CAS-BOT-BC263047  Eriogonum maculatum R. F. Hoover 1940-10-5 4670 Lassen Wendel Comment
  CAS-BOT-BC263048  Eriogonum maculatum Peter H. Raven; Otto T. Solbrig 1958-6-17 13271 Lassen Along United States Highway 395, 19.0 miles south of Ravendale Comment
  RSA78918  Eriogonum microtheca var. laxiflorum E. K. Balls, Percy C. Everett 1952-10-10 18143 Lassen 8 mi. SE of Ravendale, Hwy 395, Susanville to Alturas. 1280 Comment
  CHSC78482  Eriogonum microthecum var. laxiflorum Vernon H. Oswald 2000-7-31 9947 Lassen Spur road leading from Forest Road 28N15 to the small pond on the crest of Diamond Mountain. 2215 Comment
  SD64343  Eriogonum microthecum var. laxiflorum D. F. Howe 1966-8-24 Lassen 39 miles northeast of Litchfield on hwy #395 1676 Comment
  UC584343  Eriogonum microthecum var. laxiflorum G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2223 Lassen 6 mi s Ravensdale 1660 Comment
  SEINET245664  Eriogonum microthecum var. schoolcraftii James L. Reveal 2002-8-2 8370 Lassen 0.2 mi west of Plinco Mine Road (Lassen Co. Rd. 331), 3.5 miles east of U.S. Hwy. 395 at Doyle 1661 Comment
  JEPS127634  Eriogonum nudum Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -154 Lassen Likely Mtn. on road 171. Collecting site is a 100-300 m before reaching the Forest Service Boundary. Comment
  POM105409  Eriogonum nudum var. deductum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 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
  CAS-BOT-BC269924  Eriogonum nudum var. pubiflorum A. M. Vollmer; L. Beane 1953-7-1 30 Lassen Along Halls Flat road, beginning 6 mi. West of Susanville, to McArthur 1554 Comment
  CHSC27645  Eriogonum nudum var. pubiflorum Jerry Snodgrass 1978-7-10 47 Lassen Coleman L., SE of Eagle L. 1962 Comment
  SEINET523073  Eriogonum ochrocephalum var. ochrocephalum Paul Opler 2002-6-22 Lassen US 395, 1 mi. S. Hallelotah junction. Comment
  SBBG65173  Eriogonum ovalifolium S. W. Hutchinson -Jun-1925 Lassen Eagle Lake to Caribou Lake 1828 Comment
  CHSC12966  Eriogonum ovalifolium var. nivale K. R. Stern 1974-6-26 5864 Lassen Ca. 3 mi nw of intersection of Pittville Rd. with Hwy. 44, ca. 200 yds. ne of Poison Lake. 1700 Comment
  HSC26580  Eriogonum ovalifolium var. purpureum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19303 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  HSC63562  Eriogonum prociduum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6027 Lassen Ash Valley, along branch road off Adin-Madeline road, 200 yds. from junction 1555 Comment
  UC6570  Eriogonum prociduum Mrs. R. M. Austin June, 1894 Lassen Willow Creek Valley Comment
  CHSC12948  Eriogonum prociduum var. prociduum K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5813 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  UC85955  Eriogonum pusillum T. S. Brandegee 1892-6-24 Lassen Honey Lake Comment
  CHSC92718  Eriogonum spergulinum var. reddingianum L. P. Janeway; B. Castro 2005-7-10 8483 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. Northerly-facing side of the crest. 1859 Comment
  UC699730  Eriogonum spergulinum var. reddingianum Farris Farris 1936-6-15 Lassen Eagle Lake road 1524 Comment
  NY283102  Eriogonum sphaerocephalum G. Schoolcraft 1982-7-6 765 Lassen Fort Sage Mountains 1950.7 Comment
  SBBG65541  Eriogonum sphaerocephalum S. W. Hutchinson -Jun-1925 856 Lassen Eagle Lake 1584 Comment
  HSC63565  Eriogonum sphaerocephalum var. halimioides Thomas W. Nelson, Jane P. Nelson 1980-7-6 5998 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  SEINET530720  Eriogonum sphaerocephalum var. halimioides Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  CHSC25087  Eriogonum sphaerocephalum var. sphaerocephalum K. R. Stern 1967-7-1 2456 Lassen Ca. 16 mi. NE of Susanville. State Hwy 139. Comment
  JEPS56418  Eriogonum sphaerocephalum var. sphaerocephalum Hilda W. Grinnell 1934-5-31 Lassen near Susanville (mouth of Piute Creek Canyon); Piute Creek Canyon Comment
  NY283149  Eriogonum sphaerocephalum var. sphaerocephalum N. H. Holmgren 1980-7-4 9499 Lassen Observation Peak, south side of mountain, 19 km. (11.5 miles) airline distance east-southeast of Ravendale 1830 Comment
  RSA0029191  Eriogonum strictum John F. Emmel 1997-6-8 1491 Lassen At Hwy. 395 crossing of Secret Creek, on hill and slope 0.2-0.3 air mi WSW of the crossing, 2.7 road mi north of Karlo Road junction. 1448 Comment
  NY283175  Eriogonum strictum subsp. proliferum W. W. Eggleston 1911-7-7 7173 Lassen Secret Valley 1330 Comment
  NY283239  Eriogonum strictum subsp. proliferum H. D. D. Ripley 1943-6-13 5711 Lassen South of Johnstonville 1325.9 Comment
  UC1249283  Eriogonum strictum var. anserinum Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8473 Lassen 50 mi se Susanville 1371 Comment
  UC85813  Eriogonum strictum var. proliferum T. S. Brandegee 1892-6-30 Lassen Janesville Comment
  SEINET8513574  Eriogonum umbellatum O. Schilling, M. Gray, S. Jesselson, A. Rosenblum 2015-7-16 NV 030 -1125 Lassen Constantia Allotment, South on Red Rock Road until reach Highway 395, head South, second left into allotment, halfway up first hill 1469 Comment
  RSA0025577  Eriogonum umbellatum John F. Emmel 1996-7-14 1427 Lassen At Hwy 395 crossing of Secret Creek, on slope 0.1-0.2 air mi SSE of the crossing, 2.7 road mi north of Karlo Road junction. Comment
  RSA0029317  Eriogonum umbellatum John F. Emmel 1997-6-8 1489 Lassen At Hwy 395 crossing of Secret Creek, on slope 0.1-0.2 air mi SSE of the crossing, 2.7 road mi north of Karlo Road junction. 1402 Comment
  SEINET10479553  Eriogonum umbellatum Mary Susan Taylor 1974-1 Taylor 306 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  HSC17376  Eriogonum umbellatum var. modocense M. T. Milligan 1964-8-6 202 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CHSC106592  Eriogonum umbellatum var. nevadense C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  JEPS97420  Eriogonum umbellatum var. nevadense Vernon H. Oswald and L. Ahart 1995-6-19 6888 Lassen T30N R15E NW1/4 SE1/4 Sect. 14, 4430 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 1.7 mi e of Hwy. 395. Loosely cespitose perennial 1350 Comment
  NY399396  Eriogonum umbellatum var. nevadense A. A. Heller 1938-6-23 15215 Lassen Between Secret Valley and Ravendale. Upper Sonoran Life Zone 1524.0 Comment
  UC1032270  Eriogonum umbellatum var. nevadense H. P. Hagge 1929-9-11 22 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC1137291  Eriogonum umbellatum var. nevadense K. E. Bradshaw 1939-5-27 237 Lassen Black Mt. Experimental Forest Plot 39-1 Lassen National Forest, Halls Flat Quadrangle 1752 Comment
  SEINET10479566  Eriogonum umbellatum var. nevadense Taylor 1982-8-27 Taylor 5056 Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  CAS-BOT-BC262200  Eriogonum ursinum Clarence R. Quick 1964-8-5 64 -98 Lassen Cal Mt. east of Poison Lake 1767 Comment
  HSC17448  Eriogonum ursinum H. E. Parks, S. T. Parks Jun 1928 229 Lassen Mt. Lassen N.P., Drakesbad 1982 Comment
  UC6403  Eriogonum ursinum M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  CAS-BOT-BC262365  Eriogonum vimineum Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CHSC117539  Eriogonum vimineum Lowell Ahart; John Dittes 2016-7-13 21132 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 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. 1289 Comment
  CHSC6228  Eriogonum vimineum 1943-8-31 Lassen Susanville. Eagle Lake. 1297 Comment
  NY399826  Eriogonum vimineum G. Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade road west of Doyle Creek 1585.0 Comment
  RSA165633  Eriogonum vimineum Clare B. Hardham 1961-6-16 7490 Lassen Open woods. Gold Run Creek. South of Susanville. Comment
  UC1587101  Eriogonum vimineum G. Schoolcraft 1991-7-31 2202 Lassen along Karlo Road about 1/2 mi e Hwy. 395 1356 Comment
  SEINET3160096  Eriogonum vimineum subsp. vimineum L. S. Rose 1940-6-16 40596 Lassen Janesville 1280 Comment
  CAS-BOT-BC300947  Eriophyllum lanatum B. J. Hammerly 1941-6-20 43 Lassen 8 mi. S.-E. of Likely on Blue Lake road 1676 Comment
  PASA2212  Eriophyllum lanatum var. integrifolium Frank W. Peirson 1926-6-24 Lassen Several miles southward from the Madeline Plain Comment
  UC1609106  Eriophyllum lanatum var. integrifolium Vernon H. Oswald and Lowell Ahart 1993-6-28 5583 Lassen Harvey Valley Rd (33N02) 1.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1731 Comment
  JEPS121272  Eryngium alismifolium Lowell Ahart, John Dittes 2013-7-22 18879 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
  RSA22014  Eryngium alismifolium J. T. Howell 1934-7-10 12542 Lassen Patterson Flats Comment
  CAS-BOT-BC40726  Erysimum capitatum John Thomas Howell 1934-6-14 12154 Lassen Warner Mountains. Near Lost Lake. 2438 Comment
  UC477504  Erysimum capitatum var. capitatum Geo. O. Fisher 1928-6-21 28 Lassen Lassen <National> Forest 1615 Comment
  JEPS79211  Erysimum repandum L. R. Heckard with R. C. Bacigalupi 1980-6-11 5247 Lassen 11.3 mi. n. Litchfield (along U.S. 395 s. of Deep Creek crossing, between R.R. & hwy.) 1463 Comment
  CAS-BOT-BC55197  Erysimum repandum William Anderson 1963-4-16 s.n. Lassen Honey Lake Valley. Comment
  POM203959  Erysimum repandum J. T. Howell 1934-6-10 11904 Lassen 3 miles S of Ravendale. Comment
  CHSC66267  Erythranthe breweri Vernon H. Oswald; Lowell Ahart 1996-6-24 7866 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
  CHSC71396  Erythranthe floribunda V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9258 Lassen Moll Reservoir in Ash Valley southeast of Adin. Along the upper edge of the reservoir. 1615 Comment
  CHSC7752  Erythranthe guttata Beverley J. Wise 1969-5-18 107 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. Comment
  CAS-BOT-BC153609  Erythranthe moniliformis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49410 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC96726  Erythranthe primuloides Gordon Leppig; J. Cromwell 1997-7-27 604 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  SEINET3836923 Image available Erythranthe primuloides Marcus E. Jones 1897-1 Lassen Near Pratville, Clear Creek 1524 Comment
  CHSC60775  Erythranthe suksdorfii Vernon H. Oswald; Lowell Ahart 1993-6-14 5523 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
  UCD139645  Erythronium multiscapideum W. W. Robbins 1926-4-17 541 Lassen Grass Valley. Comment
  PASA565  Erythronium purpurascens Margaret Stason 1932-6-21 440 Lassen Devil's Kitchen, Lassen National Park Comment
  CAS-BOT-BC110550  Eschscholzia John Thomas Howell 1955-7-19 30814 Lassen Sierra Nevada. East side of Beckwourth Pass. 1493 Comment
  JEPS51782  Eschscholzia californica W. L. Jepson 1918-8-2 7774 Lassen Beckwith Pass 1463 Comment
  UC146043  Eschscholzia californica Jos. Burtt Davy June 1897 Lassen Amedee Comment
  SEINET11989048  Euclidium syriacum Unknown 1966-1 712 Lassen Frosty Acres ranch, at end of Albaugh Rd, 0.6 mi W of jct with Bassett Rd (ca 2 mi S of US 299 & 4 1280 Comment
  NY1001166  Euphorbia spathulata A. Tiehm 1984-6-7 8594 Lassen Flats on the northwest side of Shaffer Mountain, 9 air miles north-northwest of Litchfield 1387 Comment
  SEINET8687802 Image available Eurybia integrifolia G. Schoolcraft 1994-8-1 2391 Lassen About 2 miles NW of Boot Lake 2457 Comment
  CAS-BOT-BC310645  Euthamia occidentalis Louella Bass 1980-8-29 s.n. Lassen Standish Comment
  CAS-BOT-BC278430  Festuca idahoensis John Thomas Howell 1934-7-8 12496 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC278431  Festuca idahoensis John Thomas Howell 1934-7-6 12448 Lassen Harvey Valley Comment
  CAS-BOT-BC278459  Festuca idahoensis John Thomas Howell 1934-6-14 12169 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  JEPS114855  Festuca idahoensis Lowell Ahart, John Dittes 2008-6-19 14880 Lassen about 100 yds E of Willow Creek, about 120 yds NE of Hwy 139, near Forest Road 36N02, about 19.6 mi E-SE of Bieber 1578 Comment
  JEPS114856  Festuca idahoensis Lowell Ahart, John Dittes 2008-6-19 14880 Lassen about 100 yds E of Willow Creek, about 120 yds NE of Hwy 139, near Forest Road 36N02, about 19.6 mi E-SE of Bieber 1578 Comment
  POM112027  Festuca idahoensis Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC1024694  Festuca idahoensis Leo Whitney 1933-7-10 2151 Lassen ca 25 mi w Eagle Lake (upper end); Lassen National Forest, Halls Flat 1737 Comment
  UC506991  Festuca idahoensis George A. Fischer and Irwin H. Johnson 1933-7-12 F 216 Lassen Lassen Forest 1722 Comment
  CHSC92651  Festuca rubra L. P. Janeway 2005-7-3 8460 Lassen High Cascade Range. At junction of Road 22 and Road 35N40; 4.0 air km north-northwest of Blacks Ridge Lookout Tower. 1523 Comment
  HSC25728  Fragaria vesca D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19249 Lassen 3 mi. N of Westwood Comment
  RSA523910  Frasera albicaulis Gordon H. True Jr. 1936-6-25 539 Lassen East of Harvey Ranger Station, Harvey Valley. 1768 Comment
  UCD39134  Frasera albicaulis Beecher Crampton 1964-6-26 7083 Lassen 32 miles n.w. Susanville west end of Harvey Valley. Comment
  JEPS120292  Frasera albicaulis var. modocensis Tim Kask 2013-5-29 211 Lassen On USFS Rd. 18 north of Highway 44 1/4 mi. Comment
  POM128264  Frasera albicaulis var. modocensis Franklin P. Nutting s.n. Lassen South side of Dixiy [or Dixey] Mountains. Comment
  OBI75875  Fritillaria atropurpurea Anthony Baniaga 2011-1 Lassen Comment
  RSA59815  Fritillaria atropurpurea E. K. Balls 1950-5-19 14769 Lassen Above Ash Creek Public Camp, off rd. from Adin to Madeline. 1616 Comment
  SEINET8478847  Fritillaria lanceolata C. G. Gulling 1905-1 1536 Lassen Big Meadows. Comment
  RSA304281  Fritillaria pudica James R. Shevock 1971-4-9 946 Lassen East of Dana, Highway 299 915 Comment
  CDA42123  Galium aparine T. C. Fuller 1963-7-15 10897 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  CHSC7720  Galium asperrimum Beverley J. Wise 1969-5-18 96 Lassen 18.2 mi. East of Susanville on Co. Rd 216 off Lassen Co. Rd. 215. 1554 Comment
  SEINET11616108  Galium boreale C. G. Gulling 1905-1 1542 Lassen Big Meadows Comment
  POM68457  Galium mexicanum subsp. asperulum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  POM69200  Galium mexicanum subsp. asperulum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC1561784  Galium multiflorum Barbara Ertter with Gary Schoolcraft 1987-6-16 7175 Lassen ne side Honey Lake (e of road over saddle on w side of range); Skeedaddle Mountains 1645 Comment
  UC585184  Galium multiflorum E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1740 Lassen e-facing slope of gully on mountain above Red Rock 1420 Comment
  UC1226043  Galium multiflorum Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8471 Lassen 50 mi se Susanville 1371 Comment
  CHSC113000  Galium trifidum subsp. columbianum Lowell Ahart; John Dittes 2013-7-23 18895 Lassen Along the south margin of the levee road, about 150 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS6562  Galium trifidum var. pacificum Brown and Wieslander 1922-7-30 46 Lassen Martin Sprs. Eagle Lake Comment
  OBI77063  Garrya fremontii Anthony Baniaga 2011-6-7 310 Lassen Lassen NF.. W of 34N60. Burney Mtn East quad. T34N r3E sec 35 SW of NE 1747 Comment
  HSC87162  Gayophytum diffusum J. D. Prouty 1978-6-27 1 Lassen E of Eagle Lake, Black Mt. Rd., SE of Eagle Lake Field Station 1616 Comment
  CHSC37686  Gayophytum diffusum subsp. parviflorum M. S. Taylor 1982-8-19 5023 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. 1493 Comment
  UC1122620  Gayophytum diffusum subsp. parviflorum A. Simontacchi 1940-5-28 779 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  RSA0004469  Gayophytum helleri var. erosulatum W. L. Jepson 1918-8-2 7754 Lassen Beckwith Pass 1463 Comment
  UC1122567  Gayophytum heterozygum H. P. Hagge 1929-9-12 26 Lassen Logan Mtn. Eagle Lake Quadrangle Comment
  UC1122617  Gayophytum heterozygum A. Simontacchi 1940-6-24 892 Lassen 0.2 mi nnw Halls Flat Ranger Station; Lassen National Forest, Halls Flat Quadrangle Comment
  UC20269  Gayophytum heterozygum M. S. Baker and F. Nutting 1894-6-9 Lassen Pine Creek Comment
  POM38132  Gayophytum racemosum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC1536822  Gayophytum ramosissimum Gordon H. True Jr. 1938-7-9 908 Lassen near Termo; Madeline Plains 1524 Comment
  CHSC6254  Geum macrophyllum L. Harman 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  UC72970  Geum macrophyllum Milo S. Baker 1894-7-12 Lassen Pine Creek 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
  CHSC60847  Geum triflorum Vernon H. Oswald; Lowell Ahart 1993-6-28 5603 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  CHSC99305  Geum triflorum Lowell Ahart; John Dittes 2008-6-19 14872 Lassen Along a small wash, 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
  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
  CHSC6253  Geum triflorum var. ciliatum J. B. Kimsey 1946-6-25 Lassen Eagle Lake. Prison Springs, McCoy Flat. 1676 Comment
  UCR201713  Gilia Ken Osborne 2005-4-23 s.n. Lassen 3 miles SE of Honey Lake, 0.5 mile west of Turtle Mountain 1276 Comment
  SEINET14626750  Gilia brecciarum subsp. brecciarum D. L. Neal 1960-5-7 R- 34 Lassen Red Rock area, ca 10 miles S of Doyle. 1463 Comment
  JEPS87404  Gilia capillaris Vernon H. Oswald and Lowell Ahart 1993-6-28 5616 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  CDA40032  Gilia inconspicua Vernon H. Oswald & Lowell Ahart 1998-6-4 9146 Lassen Spur road on north side of Red Rock Road, 0.6 mile east of Highway 395, south of Constantia. Comment
  RSA104235  Gilia malior Verne Grant, Alva Grant 1956-5-17 9798 Lassen Just south of Secret Valley, north of Litchfield, along Hwy. 395. 1311 Comment
  CHSC93696  Gilia modocensis Lowell Ahart; John Dittes 2005-6-2 11989 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
  UC52852  Gilia sinuata J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amadee , Amadee (Amedee?) (Honey Lake Valley) Comment
  UC52853  Gilia sinuata J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen near Chat (Honey Lake Valley); , near Chat Comment
  UCD149886  Gilia sinuata William Anderson 1963-5-12 s.n. Lassen Honey Lake Valley. 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-BC302595  Gnaphalium palustre John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49494 Lassen Elysian Valley, west of Janesville 1325 Comment
  JEPS4213  Gratiola neglecta Milo S. Baker 1899-8-24 Lassen Big Valley; Carmichael's Mill Comment
  SEINET4175755  Grayia spinosa F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  CHSC7652  Grindelia squarrosa Beverley J. Wise 1968-8-28 20 Lassen 1.5 mi. north on Crazy Harry Canyon Road off Hwy 36 (Las. Co. Rd. no. 230). 1584 Comment
  SEINET8770843 Image available Grindelia squarrosa var. serrulata G. Schoolcraft 1999-8-23 2880 Lassen Turnoff to Janesville along Hwy 395 Comment
  NY1011958  Gymnosteris parvula M. J. Williams 1986-5-14 86- 38 --2 Lassen Tuledad Canyon Road, from Duck Flat to Ravendale. 0.1 mile west of California-Nevada line. Comment
  CAS-BOT-BC388467  Gypsophila paniculata T. C. Fuller 1963-7-16 10923 Lassen Janesville Comment
  JEPS103223  Hackelia amethystina G. Schoolcraft 1981-6-12 455 Lassen Gold Run Rd. on lower slopes of Diamond Mtn. 1889 Comment
  UC1137694  Hackelia californica L. R. Short, J. Warren 1936-6-26 S 458 Lassen Burgess Spring Experiment Range; Lassen National Forest 1853 Comment
  POM126235  Hackelia cusickii Franklin P. Nutting s.n. Lassen Dixey Mountains Comment
  UC1035997  Hackelia cusickii Helen K. Sharsmith 1955-6-22 4496 Lassen 5 mi beyond Blue Lake (on road to Likely); Warner Mountains, Modoc National Forest 1767 Comment
  UC1560393  Hackelia cusickii E. Joyal and D. Mehlman 1988-6-29 1296 Lassen Old Blue Lake Road w of present day road Old Blue Lake Road; Warner Mountains 1800 Comment
  OBI4720  Halogeton glomeratus T. C. Fuller 1962-8-28 9475 Lassen Herlong Siding, Hoeny Lake Valley Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  UC1553381  Helianthella californica subsp. nevadensis G. Schoolcraft 1988-7-11 1822 Lassen about 1 mi s Hwy. 44 (on road to Goumaz) 1645 Comment
  POM359823  Helianthella californica var. nevadensis L. S. Rose 1933-7-2 33268 Lassen Westwood. 1524 Comment
  CHSC43613  Helianthus annuus Vernon Oswald 1986-8-7 2274 Lassen Hwy 36, 15.7 mi e of the Lassen-Plumas County line, 1.7 mi sw of the Susan River. Roadside. 1447 Comment
  JEPS78105  Helianthus annuus G. W. Zamzow 1972-7-18 87 Lassen beside Hwy 395 16.8 mi s intersection with Highway 36 1280 Comment
  UCR57493  Helianthus annuus R. D. Goeden, Don W. Ricker 1989-8-22 890822- 9 Lassen Hwy 395 and Herlong Access Rd 1259 Comment
  JEPS124644 Image available Helianthus annuus M. R. Kempf 1965-7-12 284 Lassen [...] miles south of Milburn on Hwy 395- Sierra Valley. Comment
  JEPS34877  Helianthus cusickii Joseph Grinnell 1929-6-8 Lassen s side Pete's Valley ((Valley which extends from Horse Lake to plains w of Shaffer Mt.)) 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
  SEINET10497129  Heliotropium curassavicum var. oculatum Mary Susan Taylor 1974-1 Taylor 269 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC314967  Hemizonella minima John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49201 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  CHSC68846  Hemizonella minima Vernon Oswald; Lowell Ahart 1997-6-24 8592 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). On the edge of the road. 1685 Comment
  CAS-BOT-BC314968  Hemizonella minima H. D. Ripley; R. C. Barneby 1943-1-13 5696 Lassen South of Milford 1569 Comment
  NY1082478  Hesperochiron californicus N. H. Holmgren 1978-6-11 8910 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
  SBBG6101  Hesperochiron californicus H. and M. Dearing 1938-6-30 2230 Lassen 20 mi N of Susanville [Hwy 44] Comment
  SEINET5498645  Hesperochiron californicus D. E. Brix 1962-5-2 s.n. Lassen Spring 2 miles from Junction of Red Rock Rd. and Hwy 395 1433 Comment
  HSC82201  Hesperolinon micranthum Thomas W. Nelson, Jane Nelson 1980-7-6 6022 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir 1585 Comment
  JEPS117584  Hesperolinon micranthum Lowell Ahart, John Dittes 2010-7-31 16975 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
  JEPS127352  Hesperolinon micranthum Lowell Ahart, John Dittes 2016-7-13 21123 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
  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
  JEPS27189  Hesperolinon micranthum Lauramay T. Dempster 1961-6-17 1682 Lassen Hwy 395 just w Tule Mountain 1645 Comment
  NY1002357  Hesperolinon micranthum G. Schoolcraft 1984-7-30 1324 Lassen About 1 mile east of Post Camp 1707 Comment
  UC1601275  Hesperolinon micranthum Leo Whitney 1934-7-8 1793 Lassen open flat near Harvey Valley Spring (ca 14 mi w of Eagle Lake); Lassen National Forest Comment
  POM87379  Hesperolinon micranthum Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC280680  Hesperostipa comata John Thomas Howell 1934-6-10 11841 Lassen Near Plumas Junction Comment
  SEINET7106129  Heterotheca villosa var. minor Richard R. Halse 2010-8-26 8091 Lassen Along State Hwy. 70 at Beckwourth Pass ca 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles E of Sierra Valley.; 0 1584 Comment
  NY783473  Heuchera rubescens B. J. Ertter 1987-6-16 7201 Lassen Skeedaddle Mountains on northeast side of Honey Lake; between Hot Springs Peak and VABM 2255.5 Comment
  UC1562822  Heuchera rubescens Barbara Ertter with Gary Schoolcraft 1987-6-16 7201 Lassen ne side Honey Lake (between Hot Springs Peak and VABM); Skeedaddle Mountains 2255 Comment
  CAS-BOT-BC312311  Hieracium Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  UC485536  Hieracium horridum Franklin P. Nutting 1984-7-30 Lassen Silver Lake Silver Lake Comment
  UC92036  Hieracium scouleri unknown 1892-6-28 Lassen Janesville Comment
  CHSC7206  Hippuris vulgaris Bruce K. Briggs 1969-9-10 232 Lassen Pond at Deans Meadow on N. end of meadow. Comment
  RSA747548  Holodiscus microphyllus var. glabrescens K. M. Meyer, A. Townesmith 2007-7-23 150 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
  RSA755003  Holosteum umbellatum subsp. umbellatum L. Ahart, John Dittes 2008-6-20 14922 Lassen About 10-100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 air miles northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 air miles northeast of Bieber. 1264 Comment
  CAS-BOT-BC280876  Hordeum brachyantherum subsp. brachyantherum A. A. Beetle 1941-6-28 2800 Lassen 10 miles west of Chester 1524 Comment
  CHSC7694  Hordeum jubatum Beverley J. Wise 1969-6-4 131 Lassen 10 mi. east of Susanville on Hwy 395, Janesville cut in Hwy. 1310 Comment
  RSA123433  Hordeum jubatum H. S. Yates 1936-8-11 6075 Lassen Baxter Creek 1280 Comment
  SEINET10967353  Hordeum jubatum Billy Joe Cox, David B. Dunn Cox 3115 Lassen 6 mi N of Hallelujah Jct. on US Hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  UCD86237  Hordeum murinum subsp. glaucum John Thomas Howell 1973-7-10 49801 Lassen Susanville. In city park. 1295 Comment
  UC12398  Horkelia fusca subsp. parviflora M. S. Baker and Frank Nutting 1894-7-28 Lassen mtns to s Eagle Lake Comment
  UC1542925  Horkelia fusca subsp. parviflora G. Schoolcraft 1987-6-23 1753 Lassen Ash Valley RNA 1554 Comment
  CHSC84869  Horkelia fusca subsp. tenella L. P. Janeway; B. Castro 2003-10-5 8007 Lassen High Cascade Range. Cone Lake and trailhead parking area (trail 1.3 km southwest into Caribou Wilderness Area). Around meadows and ponds. 2055 Comment
  JEPS44575  Horkelia fusca subsp. tenella C. S. Robinson 1930-7-20 37 Lassen near Westwood Jct.; Norval Flat, Lassen Forest 1747 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-BC55478  Hornungia procumbens Arnold Tiehm 1980-5-29 5749 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles north northwest of Wendel. 1231 Comment
  POM95279  Hornungia procumbens Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC213002  Hosackia crassifolia Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  NY170061  Hutchinsia procumbens N. H. Holmgren 1978-6-11 8907 Lassen Vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28 km (17.4 mi) east of Ravendale and 22.5 km (14 mi) airline distance. 1680 Comment
  JEPS87416  Hydrophyllum capitatum var. alpinum Vernon H. Oswald and Lowell Ahart 1993-5-12 5378 Lassen 3.5 mi nw of A21 to Westwood (on n side of road and on e side of Canal crossing Hwy 44) 1729 Comment
  SEINET183889  Hydrophyllum capitatum var. alpinum L. Constance 1938-7-10 2325 Lassen 0.5 miles W of Fredonyer Pass. 1676 Comment
  CDA40307  Hydrophyllum capitatum var. alpinum T. C. Fuller 1963-6-1 10639 Lassen 0.25 mile north of Willow Springs Campground, 3.1 miles southeast of Pittville-Susanville Road, 12.4 miles (road) south of Pittville. 0 Comment
  RSA370316  Hymenolobus procumbens A. Tiehm, Margaret J. Williams, Gary Schoolcraft 1986-5-12 10350 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
  POM86608  Hypericum formosum var. scouleri Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  SD130459  Hypericum formosum var. scouleri John Thomas Howell, Gordon H. True and Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CAS-BOT-BC401309  Hypericum scouleri John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville 1325 Comment
  SEINET10904184  Idahoa scapigera David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17766 Lassen Approx. 12 Mi. S. Of adin on ca. Hwy 139, in basalt and clay; along edge or rd. On rolling knoll, in artemesia juniper assoc. 1372 Comment
  NY52525  Iliamna bakeri G. Schoolcraft 1983-7-20 1101 Lassen SE slopes of Fredonyer[?] mtn. 2011.7 Comment
  NY716915  Iliamna bakeri R. R. Halse 2004-7-8 6615 Lassen Along State Highway 139, ca. 6 miles north of Eagle Lake 1710 Comment
  UC879819  Ipomopsis aggregata C. L. Hitchcock 1940-5-26 6601 Lassen ca 12 mi n Fall River Mills (Shasta Co.); Fall River Comment
  CHSC12453  Ipomopsis aggregata subsp. formosissima Robert W. Severin 1969-7-10 46 Lassen Found on Galatin Peak, in burn area; 2 mi s of E.L.B.S. 1828 Comment
  CHSC63410  Ipomopsis congesta subsp. congesta V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6354 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  CAS-BOT-BC69981  Isoetes bolanderi John Thomas Howell 1959-9-23 34891 Lassen Juniper Lake Campground, Lassen Park. 2057 Comment
  SD64329  Iva axillaris Darley F. Howe 1966-8-25 Lassen 41 miles south of Alturas on Highway 395. 1675 Comment
  RSA523308  Iva axillaris subsp. robustior Gordon H. True Jr. 1936-6-21 517 Lassen SE of Litchfield, Honey Lake Valley. 1220 Comment
  SEINET10971179  Iva axillaris subsp. robustior Mary Susan Taylor 1982-8-19 Taylor 5022 Lassen T23N R17E ne sec 23? Beckwourth Pass quad. E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. Sagebrush Scrub; 4900 ft. 1493 Comment
  JEPS91208  Ivesia paniculata Dean Wm. Taylor with Glenn Clifton 1990-6-12 10875 Lassen Ash Valley, ca. 2 miles W from junction of Spooker Road with Forest Road 39N08 Comment
  UC1502548  Ivesia paniculata Thomas W. Nelson and Jane P. Nelson 1980-7-6 5984 Lassen 16 mi e Adin (along Adin-Madeline Rd); Ash Valley; Ash Valley, Lassen Co. 1554 Comment
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Aug 12 2008
  UC1567359  Ivesia paniculata G. Schoolcraft 1980-7-14 306 Lassen w of Madeline; Ash Valley 1548 Comment
  SEINET7421696 Image available Juncus balticus A. L. Hormay 1941-1 25441 Lassen Sec. 31, T 33N, R 9 E, Little Harvey Valley. Altitude 5500 ft. 2007 Comment
  JEPS121288  Juncus balticus subsp. ater Lowell Ahart, John Dittes 2013-7-23 18903 Lassen About 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  HSC23084  Juncus balticus subsp. ater John Pratt 1970-1 14 Lassen Comment
  CHSC93553  Juncus bryoides Lowell Ahart; John Dittes 2005-6-2 11960 Lassen Long Valley, moist meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, 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
  SEINET3877716  Juncus bufonius Arnold Tiehm, Jan Nachlinger; Gary Schoolcraft 1984-6-25 8824 Lassen Rodeo Flat, 2.7 road miles west of the state line on Buckhorn road from Ravendale to Highway 81.; 0 1829 Comment
  RSA0011564  Juncus bufonius Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46988 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line 1616 Comment
  SEINET11787326  Juncus bufonius A. Tiehm, Nachlinger, J.; Schoolcraft, G. 1984-1 8824 Lassen Rodeo Flat, 2.7 road mi W of state line on Buckhorn road from Ravendale to Hwy 81 1829 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
  JEPS28715  Juncus bufonius var. occidentalis George W. Gillett 1957-7-29 953 Lassen near Snag Lake east inlet; Lassen Volcanic National Park, Snag Lake 1850 Comment
  UC1609100  Juncus bufonius var. occidentalis Vernon H. Oswald and Lowell Ahart 1993-6-28 5598 Lassen ne of Poison Lake (Road 35N04 at Aspen Well, n of Hwy 44 on the nw edge of Harvey Valley); Harvey Valley, Aspen Well 1725 Comment
  RSA129757  Juncus confusus L. R. Short, J. Warren 1936-6-10 S- 418 Lassen MDM, Burgess Spr. Exp. Range. 1857 Comment
  UC1137590  Juncus confusus A. Simontacchi 1940-7-3 918 Lassen 3.4 mi wsw Harvey Mtn. Lookout; Halls Flat Quad. 1828 Comment
  JEPS67134  Juncus ensifolius W. L. Jepson 1918-8-2 7794 Lassen Constantia Honey Lake Valley 1219 Comment
  JEPS87448  Juncus hemiendytus var. abjectus Vernon H. Oswald and Lowell Ahart 1993-6-3 5481 Lassen between Poison Lake and Susanville (s. side of Pine Creek Valley, Champs Flat Rd. (Lassen 105, Forest 32N28Y), where it diverges from Lassen 21 (32N02) to Eagle Lake); Pine Creek Valley 1725 Comment
  JEPS96073  Juncus hemiendytus var. abjectus Vernon H. Oswald and Lowell Ahart 1996-6-24 7852 Lassen ca 0.5 mi e Eagle Lake Rd. (A1) (and 2.5 mi s of Eagle Lake, w side of meadow just s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1608994  Juncus hemiendytus var. hemiendytus Vernon H. Oswald and Lowell Ahart 1993-6-3 5483 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y), 2.4 mi n of its jct with Lassen 21 (32N02) to Eagle Lake (on w edge of Pine Creek Valley, between Poison Lake and Susanville); Pine Creek Valley 1728 Comment
  SEINET3507367 Image available Juncus longistylis Marcus E. Jones 1897-6-30 Lassen Susanville, 4 miles below Eagle Lake 1524 Comment
  CAS-BOT-BC110769  Juncus mertensianus Clare B. Hardham 1969-8-28 17441 Lassen Sierra Nevada. West of Janesville. Comment
  CDA33205  Juncus nevadensis Gordon Leppig 1998-6-12 933 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  HSC95202  Juncus nevadensis Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-28 512 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95223  Juncus nevadensis Gordon Leppig, J. Cromwell 1997-7-26 598 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS28659  Juncus nevadensis George W. Gillett 1957-7-21 866 Lassen along trail from Juniper Lake to Cameron Meadow; Lassen Volcanic National Park 2118 Comment
  JEPS103213  Juncus nevadensis G. Schoolcraft 1993-6-21 2301 Lassen North slopes of Skedaddle Mountains 1828 Comment
  JEPS105651  Juncus occidentalis L. P. Janeway 2001-6-20 7192 Lassen High Cascade Range. South side of the junction of the ''22'' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain 1560 Comment
  UC1142959  Juncus orthophyllus A. L. Hormay 1941-6-25 30 Lassen Westwood Junction Lassen National Forest 1737 Comment
  UC773861  Juncus tenuis L. R. Short and J. Warren 1936-6-10 S- 418 Lassen Burgess Spring Experiment Range. Comment
  SD243239  Juncus trilocularis Peter F. Zika 2008-7-14 23893 Lassen Cascade Range Highlands: S side of Route 44, SE end of Grays Valley near Lodgepole. 1730 Comment
  CHSC117195  Juniperus occidentalis Lowell Ahart; John Dittes 2016-6-7 20974 Lassen 20 yards west of 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
  UC572307  Juniperus occidentalis C. G. Albertus 1935-11-1 294 Lassen 2.1 mi ne Chats; Sierraville quadrangle 1569 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
  UCR164308  Juniperus occidentalis Maile Neel 2000-4-29 G- 3 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
  SEINET10859617  Juniperus occidentalis Leila M. Shultz, John S. Shultz 1985-6-23 Shultz 8601 Lassen 41 miles north of Susanville on highway 395. Dark basaltic soils. Western Juniper-sagebrush-bitterbrush association. 1435 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
  RSA519137  Juniperus occidentalis var. occidentalis George K. Helmkamp 1990-9-23 D- 6 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  SEINET10719654  Juniperus occidentalis var. occidentalis Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 132 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  UCR3792  Juniperus occidentalis var. occidentalis Frank C. Vasek 1964-9-13 640913- 01 Lassen Warner Mtns., c. 1 mi east of Blue Lake Comment
  CHSC23328  Juniperus osteosperma Mark Stopher 1976-1-11 30 Lassen Ca. 52 miles south of Susanville on Hwy 395 then two miles east on Red Rock Road. 1328 Comment
  NY20366  Juniperus osteosperma J. T. Howell 1961-9-26 36969 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
  SD139404  Juniperus osteosperma F. C. Vasek 1964-9-12 day 6 Lassen U. S. 395, 5.2 miles north of its junction with State Highway 70 (U. S.40) 1480 Comment
  UCD133871  Juniperus osteosperma John Thomas Howell 1961-9-26 36969 Lassen Beckworth Pass east side. 1554 Comment
  SEINET10869776  Kelloggia galioides Mary Susan Taylor 1974-1 Taylor 273 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC180801  Kochia scoparia Louella Bass 1981-12-1 s.n. Lassen Standish 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
  UCD86010  Koeleria macrantha L. Whitney 1935-6-24 3300 Lassen Squaw Valley, CA. 13 miles west of north end of Eagle Lake. Comment
  UCD86011  Koeleria macrantha L. Whitney 1935-6-24 s.n. Lassen Squaw Valley. Comment
  OBI75889  Kyhosia bolanderi Anthony Baniaga 2011-8-16 499 Lassen Lassen Natl Forest. Along F.S. 10, ca. 1 mi NE of Cummings Spring. Red Cinder quad. T30N R8E sec 7SE of SW 1920 Comment
  CAS-BOT-BC341483  Lagophylla ramosissima John Thomas Howell 1934-6-10 11863 Lassen Honey Lake Valley, 37 miles s. of Susanville Comment
  JEPS38999  Lagophylla ramosissima W. L. Jepson 1918-8-2 7776 Lassen Bedswith Pass 1463 Comment
  POM204133  Lagophylla ramosissima J. T. Howell 1934-6-10 11863 Lassen Honey Lake Valley, 37 miles S of Susanville. Comment
  UC33057  Lagophylla ramosissima M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CHSC66374  Lagophylla ramosissima subsp. ramosissima Vernon H. Oswald; Lowell Ahart 1996-6-17 7782 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Along the trail at the 7 mile post on the N side of Hwy. 36 between the trail and highway bridges spanning the Susan River. 1432 Comment
  POM253248  Lathyrus pauciflorus subsp. brownii A. A. Heller 1938-6-4 15147 Lassen 1 mile east of Fredonyer Pass. 1707 Comment
  CHSC59691  Layia glandulosa Mary Meyer 1980-4-24 Lassen Shaffer Mt. 1432 Comment
  SBBG22256  Layia glandulosa C. B. Hardham 1961-6-16 7486 Lassen Gold Run Crk, S of Susanville Comment
  SEINET11447828 Image available Layia glandulosa F. B. Headley 1915-5-28 s.n. Lassen Honey lake Comment
  CHSC4847  Lemna minor R. Carter 1967-7-13 590 Lassen Along shore of Willow Creek. Comment
  HSC95316  Lemna minuta Gordon Leppig 1998-8-17 1048 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC4842  Lemna trisulca R. Carter 1967-7-13 591 Lassen 5 mi e of Eagle Lake Field Station, at point where rd comes nearest to Willow Cr. 1560 Comment
  SEINET11586251  Lemna trisulca B. L. Wilson, R. Brainerd, D. Lytjen, B. Newhouse, N. Otting 2004-8-24 11166 Lassen Snowstorm Creek, at a spring; upstream of Biscar Reservoir, W of an old railroad right of way 1463 Comment
  JEPS407  Lemna turionifera W. L. Jepson 1918-8-16 8000 Lassen Merrillville 1524 Comment
  CAS-BOT-BC88821  Lepidium campestre Louella Bass 1974-5-23 EV 143 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CHSC112401  Lepidium campestre Lowell Ahart; John Dittes, Todd Sloat 2013-6-9 18782 Lassen Pasture field, about 100 yards west of the north-south road, on the west side of McArthur Diversion Canal, 2.1 air-miles of Rat Farm Boat Launch, 1.2 air-miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  CHSC36453  Lepidium perfoliatum Susan H. Euing 1982-6-2 7 Lassen Ca. 2 mi e jct Hwy 139 and Ravendale Rd., ca. 10 yds e of Ravendale Rd. Comment
  CHSC4915  Lepidium perfoliatum A. E. Anderson 1967-7-1 69 Lassen North side of road 0.5 mi. e of Murrer Ranch buildings. 1371 Comment
  CHSC5238  Lepidium perfoliatum L. Martin 1953-6-30 Lassen Eagle Lake. E side of Honey Lake near Doyle. 1299 Comment
  CHSC80174  Lepidium perfoliatum Jeanne Boze 1981-6-11 105 Lassen Along shore of Horse Lake, about 11.5 mi from Hwy 139 on Horse Lake Road. 1542 Comment
  CHSC91205  Lepidium perfoliatum Lowell Ahart; John Dittes 2005-6-2 11920 Lassen Along the road, near the Anderson Ranch home, 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
  JEPS95756  Lepidium perfoliatum Vernon H. Oswald and L. Ahart 1995-6-19 6899 Lassen T30N R16E southeast corner Sect. 6, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395 1383 Comment
  UC1126714  Lepidium perfoliatum A. Simontacchi 1940-6-8 829 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC1143000  Lepidium perfoliatum August L. Hormay 1934-5-15 Lassen nw of Black Mt.; Lassen National Forest, Forest and Range Expt. Sta. 1584 Comment
  SEINET10448715  Lepidium perfoliatum Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 860 Lassen Collected at the jct. Of hwy 70 & 395 at arco station. Comment
  UC1137585  Leptodactylon pungens A. Simontacchi 1940-6-30 911 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quad. Comment
  UC572594  Leptodactylon pungens E. Sawyer 1935-6-27 230 Lassen Long Valley; Sierraville Quad., Long Valley Comment
  JEPS126521  Leptosiphon bolanderi Lowell Ahart, John Dittes 2016-6-7 20979 Lassen 10 yards west of the pond, 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
  CHSC29931  Leptosiphon ciliatus Robin L. Ondricek 1978-6-20 63 Lassen On the e side of the s end of Eagle Lake in the Gallatin Burn. 1.8 mi s of Five Corners. 2011 Comment
  CHSC91188  Leptosiphon ciliatus Lowell Ahart; John Dittes 2005-6-2 11936 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
  SEINET7967451 Image available Leptosiphon ciliatus John Thomas Howell 1974-7-10 50560 Lassen Elysian Valley 1326 Comment
  JEPS87460  Leucocrinum montanum Vernon H. Oswald and Lowell Ahart 1993-5-12 5375 Lassen Hwy 44 1.6 mi n.w. of its intersection with A21 (to Westwood) (ne side of Hwy 44) 1737 Comment
  CAS-BOT-BC508364  Leucocrinum montanum Ellsworth Bethel 1923-5-24 s.n. Lassen Poison Lake Comment
  CAS-BOT-BC508365  Leucocrinum montanum G. Schoolcraft 1988-5-11 1794 Lassen Along Hwy. 139 n. of Said Valley Reservoir 1676 Comment
  SEINET12044970  Leucocrinum montanum R. M. Austin 1879-1 s.n. Lassen Pine Creek Comment
  SEINET12326117  Leucophysalis nana A. Seneres, Harold, N. 1983-1 101 Lassen Road 21 to Silver Lake, Lassen National Forest 1821 Comment
  UC614395  Lewisia nevadensis L. Constance 1938-6-11 2326 Lassen 5 mi sw Susanville 1371 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
  CAS-BOT-BC283771  Leymus cinereus John Thomas Howell 1974-7-10 50554 Lassen Elysian Valley 1325 Comment
  JEPS127710  Leymus cinereus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -165 Lassen Cold Spring Road N after Dorsey Butte. Comment
  JEPS128173  Leymus cinereus M. C. Mahoney, J. A. Nash 2017-8-22 CA 350 -88 Lassen South of Pilgrim Lake of Buckhorn Byway. From Susanville take Highway 395 north to Buckhorn Byway and follow the road east past Buckhorn Reservoir and Dry Lake. Then take a right onto an unnamed road that is right on the CA/NV border. Continue for 1/2 mile. Population is on either side of the road. Comment
  JEPS68548  Leymus cinereus W. L. Jepson 1918-8-2 7795 Lassen Constantia Honey Lake Valley 1219 Comment
  UC1924193  Leymus cinereus Debra Valov 2005-8-20 2005237 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1279 Comment
  UC584329  Leymus cinereus G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2227 Lassen 6 mi s Ravendale 1660 Comment
  UCD32674  Leymus cinereus Beecher Crampton 1954-7-6 2078 Lassen Lassen County, 3 miles south of Ravendale. Comment
  CHSC13735  Lilium washingtonianum subsp. washingtonianum S. Villard 1973-7-3 58 Lassen On west side of county road going from Susanville to Plumas National Forest, 2 miles after pavement ends. Comment
  JEPS22194  Limosella acaulis Rimo Bacigalupi with S. Galen Smith 1957-7-28 5997 Lassen along U.S. Highway 395 on Madeline Plains 3.1 mi s Madeline; Madeline Plains 1615 Comment
  JEPS23857  Limosella acaulis Peter H. Raven and Otto T. Solbrig 1958-6-17 13287 A Lassen along United State Highway 395, 1.8 mi s Ravendale Comment
  UC1609110  Limosella acaulis Vernon H. Oswald and Lowell Ahart 1993-6-14 5508 Lassen Lassen A21 (32N02) 5.3 mi e of Lassen 105 (32N28Y) ca 7 mi (air) w Eagle Lake (near Summit Camp); w of Eagle Lake 1889 Comment
  CAS-BOT-BC246146  Limosella aquatica Malcom A. Nobs; S. Galen Smith 1949-7-20 1046 Lassen Bieber, along Highway 299 Comment
  CAS-BOT-BC246147  Limosella aquatica R. F. Thorne; C. W. Tilforth 1969-9-5 39137 Lassen Said Valley Reservoir Comment
  JEPS121274  Limosella aquatica Lowell Ahart, John Dittes 2013-7-23 18889 Lassen Man-made pond, about 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1025087  Linanthus harknessii Leo Whitney 1934-7-5 1788 Lassen ca 15 mi w Eagle Lake (near Harvey Spring); Lassen National Forest, Crater Mountain 2225 Comment
  UC106752  Linanthus septentrionalis T. S. Brandegee 1892-6-30 Lassen Jonesville Comment
  CHSC36469  Linum lewisii var. lewisii Jeffrey R. Peak 1982-6-3 30 Lassen Ca. .8 mi s jct forest service roads 5.I6 and 5.I7 heading toward 5-corners. Comment
  CHSC36496  Linum lewisii var. lewisii Theresa Costa 1982-6-3 30 Lassen Ca. .8 mi s jct forest service rds 5.I6 and 5.I7, ca. 5 yd w 5.I6, heading towards 50corners. Comment
  CHSC61430  Linum lewisii var. lewisii Vernon H. Oswald; Lowell Ahart 1993-8-18 5832 Lassen Lassen Volcanic National Park. Summit ridge of Mt. Conard, near the S boundary of the park. Common in loose rock approaching the highest point on the ridge from the north. 2484 Comment
  CHSC99539  Linum lewisii var. lewisii Lowell Ahart; John Dittes 2008-6-20 14917 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
  JEPS107872  Linum lewisii var. lewisii Lowell Ahart, John Dittes 2005-6-2 11935 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
  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
  CHSC13605  Lithophragma Lynn R Thomas 1969-4-17 96 Lassen Ca. 200 yds. up hillside e of Rice Canyon Rd., 5 mi n of junction with 'back road to Litchfield'. Ca 12 mi e of Susanville. 1310 Comment
  CHSC7762  Lithophragma glabrum Beverly J. Wise 1969-3-4 97 Lassen 80 yds west of Hwy 139, 1.4 mi. north of Susanville. 1584 Comment
  JEPS94533  Lithophragma glabrum Vernon Oswald and Lowell Ahart 1997-6-24 8641 Lassen s of Susanville (near the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC1136831  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 Comment
  CHSC12951  Lomatium K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5842 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  SEINET8588548  Lomatium austiniae 2015-5-11 NV 030 -1054 Lassen Constantia Allotment. HWY 395 into CA, past Red Rock fire entrance, turn right onto dirt road entrance before reaching the bridge, drive past two cattle guards, site along ATV road. 1510 Comment
  CHSC117201  Lomatium bicolor var. leptocarpum Lowell Ahart; John Dittes 2016-6-7 20975 Lassen 20 yards west of the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 6.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS105642  Lomatium bicolor var. leptocarpum L. P. Janeway 2001-6-19 7186 Lassen High Cascade Range. Southeast edge of Long Lake (which is dry) at west end of Long Valley; 6.4 km north-northwest of Harvey Mountain 1640 Comment
  JEPS94116  Lomatium macrocarpum Vernon H. Oswald and Lowell Ahart 1998-5-22 9110 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.6 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1402 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
  UCR183199  Lomatium macrocarpum Jim Andre, G. L. Clifton 1993-6-2 7717 Lassen Honey Lake, Honey Lake Valley, along Smoke Creek Valley Road, c. 10 mi west of the Nevada border, near Herlong Siding, south of Skedaddle Mtns 1243 Comment
  RSA715615  Lomatium nevadense L. Ahart 2005-6-1 11847 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction 1449 Comment
  UC1523794  Lomatium nevadense Gary Schoolcraft 1981-4-23 365 Lassen Ash Valley 1524 Comment
  CHSC101028  Lomatium nevadense var. nevadense John Dittes 2008-5-22 1540 Lassen Modoc Plateau; ca 15.3 air miles southeast of Adin, ca. 3.5 air miles east of Hayden Hill, ca. 465 feet east of intersection of Hwy 139 and FS Road 36N02. 483 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
  CHSC42626  Lomatium nudicaule Vernon Oswald 1986-5-28 2047 Lassen Hwy 36, 11.3 mi e of the Plumas-Lassen Co. line, 0.5 mi sw of Fredonyer Pass. 1691 Comment
  UC1187705  Lomatium plummerae Tracey and Viola Call 1961-5-30 1961 Lassen about 3 1/2 mi S of Ravendale Comment
  CAS-BOT-BC217795  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6564 Lassen U.S. Hwy 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield 1330 Comment
  JEPS28836 Image available Lomatium ravenii Lincoln Constance and Emil DiFulvio 1962-4-16 3747 Lassen 1 mi. s. Ravendale 1615 Comment
  LA84781  Lomatium ravenii Tracy Call; Viola Call 1961-5-30 2048 Lassen about 2 mi. S of Ravendale 1462 Comment
  RSA0049612  Lomatium ravenii Dean Wm. Taylor 2012-6-7 21233 Lassen 1 mile south of Ravendale (along Highway 395, 100 meters East of the highway ROW) 1615 Comment
  UC1177543 Image available Lomatium ravenii Peter H. Raven with Otto T. Solbrig 1958-6-17 13287 Lassen 1.8 mi. s. Ravendale (along U.S. Hwy. 395) Comment
  SEINET10693768 Image available Lomatium ravenii Lincoln Constance, Rimo Bacigalupi 1959-6-14 Constance 3672 Lassen Open, slightly alkaline flat with Artemisia, Blepharipappus, Cryptantha and Eriogonum. One mile south of Ravendale. 1463 Comment
  POM78599  Lomatium triternatum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 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
  CHSC112137  Lomatium triternatum var. triternatum Dean Wm. Taylor 2012-6-19 21244 Lassen Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 air miles S of Adin). 1722 Comment
  RSA0049622  Lomatium vaginatum Dean Wm. Taylor 2012-5-17 21207 Lassen Highway 395 about 0.5 miles S of the Modoc County line, east side of the highway between the roadway and the fenceline (3 miles S of Likely) Comment
  SEINET13944725 Image available Lomatium vaginatum Arnold Tiehm, Margaret Williams and Gary Schoolcraft 1986-1 10345 Lassen 6.7 miles east of highway 395 on dirt road to Smoke Creek and the Smoke Creek Desert; 4650 ft. T30 R16E SEC3. 1417 Comment
  SEINET9672826  Lomatium vaginatum G. Schoolcraft 1979-5-1 13 Lassen East of Post Camp 1707 Comment
  JEPS87400  Lotus corniculatus Vernon H. Oswald and Lowell Ahart 1993-6-28 5608 Lassen 1.5 mi ne of Aspen Well (n of Hwy 44 on Harvey Rd One (34N27), n of Harvey Valley, ne of Poison Lake); Harvey Rd One 1761 Comment
  NY716010  Lotus purshianus A. G. Jones 1984-8-11 6876 Lassen Along Road 395, near Doyle 1350 Comment
  UC507000  Lotus purshianus var. purshianus George A. Fischer and Irwin H. Johnson 1933-7-12 F- 193 Lassen Grass Valley Lassen Forest 1694 Comment
  UC862221  Lotus purshianus var. purshianus A. A. Heller 1938-6-23 15199 Lassen slope e of Fredonyer Pass 1828 Comment
  NY716011  Lotus tenuis A. J. Cronquist 1959-6-17 8474 Lassen Old field near Honey Lake, 1 mile southeast of Milford, 26 miles southeast of Susanville 1311 Comment
  RSA0028052  Lupinus John F. Emmel 1996-7-14 1426 Lassen Long Valley; between Hwy. 395 and railroad tracks at south edge of Doyle. 1305 Comment
  CHSC91929  Lupinus andersonii L. P. Janeway; B. Castro 2005-7-10 8482 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. 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
  HSC63936  Lupinus arbustus subsp. calcaratus Teresa Prendusi 1980-7-21 Lassen Fredonyer Peak near summit 2393 Comment
  SEINET10484655  Lupinus arbustus subsp. calcaratus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2577 Lassen 6 miles s of adin; along cal hwy 139 right-of-way; in basalt clay, grassy road Bank; artemisia, juniper assoc. 1372 Comment
  CAS-BOT-BC196338  Lupinus argenteus var. argenteus H. D. Ripley; R. C. Barneby 1944-5-30 5975 Lassen Ravendale 1676 Comment
  CAS-BOT-BC208764  Lupinus argenteus var. heteranthus Margaret Williams 1974-7-27 74 -L-58 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 - Sierra Nevada 1493 Comment
  CAS-BOT-BC208765  Lupinus argenteus var. heteranthus Margaret Williams; Steven Williams 1974-7-26 74 -L-13 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 - Sierra Nevada 1493 Comment
  CHSC7678  Lupinus argenteus var. heteranthus Beverley J. Wise 1969-5-18 61 Lassen 7.7 mi. East of Susanville on the south side of Las. Co. Rd. 125. 1341 Comment
  JEPS107302  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2005-6-1 11873 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, 3.8 miles (air) northwest of Hallelujah Junction 1448 Comment
  NY736926  Lupinus argenteus var. heteranthus A. A. Heller 1938-6-23 15203 Lassen Along U.S. Highway #395 just outside of Johnstonville. Upper Sonoran Life Zone Comment
  NY736930  Lupinus argenteus var. heteranthus G. H. True Jr. 1936-6-27 556 Lassen Near top of Hot Spring Mountain 1829 Comment
  NY736931  Lupinus argenteus var. heteranthus J. H. Christ 1949-5-22 18218 Lassen 8 miles southeast of Doyle, along Highway 395 Comment
  SBBG3562  Lupinus argenteus var. heteranthus H. and M. Dearing 1938-6-30 2228 Lassen Poison Lake, 40 mi W of Susanville 1219 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
  SEINET5327809  Lupinus argenteus var. heteranthus G. Schoolcraft 1997-5-14 2589 Lassen W slope of Ft. Sage Mtns. 3 mi N of Doyle 1311 Comment
  HSC28310  Lupinus brevicaulis D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19280 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  SEINET10969898  Lupinus brevicaulis David B. Dunn 1956-7-3 Dunn 11916 Lassen Coll. On a dry rocky slope with only an occasional juniper, considerable Artemisia tridentata. N side of the alkali flats, 31 mi. Ne of johnstonville On hwy 395. Comment
  SEINET5328130  Lupinus brevicaulis M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-14 86- 40 -1 Lassen Near Hwy 395, at Noble Emigrant Trail Sign, 7 rd miles N of Litchfield 1524 Comment
  JEPS65040  Lupinus breweri C. S. Robinson, G. S. Crew 1927-6-25 55819 Lassen near Westwood Junction (sw Lassen County); Lassen National Forest, nr Westwood Junction 1706 Comment
  UC1184055  Lupinus breweri Jean Langenheim 1957-6-26 4401 Lassen nw Said Valley (northeastern part of Lassen County); nw Said Valley Comment
  CAS-BOT-BC196642  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  RSA59517  Lupinus caudatus E. K. Balls 1950-5-21 14824 Lassen Standish, 7 miles from junction of Highway 36 and 395. 1250 Comment
  JEPS95873  Lupinus grayi Vernon H. Oswald and L. Ahart 1999-6-9 9759 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass: T29N R10E NW1/4 Sect. 22, 5400 ft elevation, mixed coniferous forest 1645 Comment
  UCD108200  Lupinus latifolius var. columbianus Jack Major 1966-6-24 s.n. Lassen above Blue Lake, Warner Mounains, Modoc National Forest, northeastern part of county (ca. 18. miles airline southeast of Likely). Comment
  CHSC66388  Lupinus lepidus var. confertus Vernon H. Oswald; Lowell Ahart 1996-6-17 7807 Lassen Modoc Palteau. Bizz Johnson Trail accessed at Devils Corral Trailhead loacted off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of Susan River E of Devils Corral Trailhead and W of the 6.0 mile post. 1402 Comment
  JEPS65081  Lupinus lepidus var. confertus W. L. Jepson Aug. 1918 7798 Lassen Raker Ranch near Buntingville; Raker Ranch naer Buntingville 1219 Comment
  NY747210  Lupinus lepidus var. confertus G. Schoolcraft 1982-7-14 782 Lassen Along Highway 395 near Janesville 1311 Comment
  NY747211  Lupinus lepidus var. confertus M. J. Williams 1983-7-31 83- 126 --1 Lassen Roadside near Janesville 1280 Comment
  CHSC99124  Lupinus lepidus var. sellulus Lowell Ahart; John Dittes 2008-6-19 14886 Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  OBI76907  Lupinus leucophyllus Anthony Baniaga 2011-7-9 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  UC1609421  Lupinus leucophyllus Vernon H. Oswald and Lowell Ahart 1993-6-28 5607 Lassen Rd 35N04 n Hwy 44 (nw edge of valley, ne of Poison Lake); Harvey Valley, Aspen Well 1725 Comment
  NY747375  Lupinus leucophyllus var. leucophyllus H. D. D. Ripley 1943-6-13 5679 Lassen Milford 1265 Comment
  CAS-BOT-BC202121  Lupinus nevadensis B. J. Cox; Paul Gallian 1971-6-2 2595 Lassen Hallelujah Jct. intersection of U.S. 395 and Calif. Hwy. 70 1432 Comment
  JEPS94110  Lupinus nevadensis Vernon H. Oswald and Lowell Ahart 1998-5-22 9113 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.6 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1402 Comment
  SEINET10450722  Lupinus obtusilobus Harold W. Rickett 1968-8-22 Rickett s.n. Lassen Collected in Lassen Volcanic National Park near the peak. In dry ground. Comment
  UC574453  Lupinus onustus M. E. Jones 1897-6-26 Lassen Perkin's Ranch Susanville (Susanville) 1463 Comment
  SEINET10486219  Lupinus saxosus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2575 Lassen 6 mi s of adin; along state hwy. 139 Right-of-way. In basalt-clay, grassy road Bank. Artemisia-juniper association. 1372 Comment
  SEINET10488918  Lupinus sellulus Katherine L. Morris 1973-5-25 Morris 215 Lassen Collected 2.6 mi w of susanville, on u.s. 36, In an area of pinus jeffreyi and Purshia. Intermediate to l. Confertus (?). Comment
  HSC95311  Lycopus uniflorus Gordon Leppig 1998-8-17 1051 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC113060  Lythrum hyssopifolia Lowell Ahart; John Dittes 2013-7-23 18896 Lassen Along the south margin of the levee road, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS121263  Lythrum hyssopifolia Lowell Ahart, John Dittes 2013-7-23 18896 Lassen Along S margin of the levee road, about 100 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, 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
  RSA0105577  Lythrum tribracteatum Lowell Ahart, John Dittes 2013-7-23 18902 Lassen 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
  RSA252467  Machaeranthera canescens var. canescens R. F. Thorne, C. W. Tilforth 1969-9-6 39268 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  CAS-BOT-BC342645  Madia citrigracilis John Thomas Howell 1934-7-8 12494 Lassen Spalding's, Eagle Lake 1584 Comment
  CHSC71868  Madia glomerata Vernon H. Oswald; Lowell Ahart 1998-9-8 9576 Lassen Hwy. 299 at RR overpass on the east side of Nubieber. 1255 Comment
  CAS-BOT-BC334688  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  CAS-BOT-BC343056  Madia gracilis John Thomas Howell 1973-7-10 49781 Lassen Fredonyer Pass 1737 Comment
  CAS-BOT-BC343057  Madia gracilis John Thomas Howell 1974-7-10 50552 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC343058  Madia gracilis John Thomas Howell 1973-7-10 49781 Lassen Fredonyer Pass 1737 Comment
  CHSC106081  Madia gracilis Lowell Ahart; John Dittes 2010-7-31 17006 Lassen Dry meadow on the bottom of a small wash, about 5 yards north 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
  CHSC66376  Madia gracilis Vernon H. Oswald; Lowell Ahart 1996-6-17 7783 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
  CAS-BOT-BC343060  Madia gracilis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50653 Lassen Slope south and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC343061  Madia gracilis Noel H. Holmgren; Patricia K. Holmgren 1980-7-4 9497 Lassen Observation Peak, south base in upper Smoke Creek drainage, 19 km (12 mi) airline distance east-southeast of Ravendale 1680 Comment
  CAS-BOT-BC512876  Maianthemum stellatum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49421 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC512878  Maianthemum stellatum Louella Bass 1973-6-17 120 Lassen Elysian Valley 1325 Comment
  SEINET11601737 Image available Malacothrix sonchoides G. Schoolcraft 1980-5-16 236 Lassen Behind kiln overn along Wendel Highway 1280 Comment
  CHSC64758  Malacothrix torreyi Vernon H. Oswald 1995-5-24 6786 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) at milepost 18.5, ca. 1 mi e of Duck Lake Rd. On the s side of the road. 1219 Comment
  SEINET11601767 Image available Malacothrix torreyi A. Tiehm 1978-5-15 4159 Lassen 0.4 mile west of the Nevada stateline on highway 81 from Gerlach to Cedarville Comment
  CAS-BOT-BC71143  Marsilea R. F. Thorne; C. W. Tilforth 1969-9-5 39139 Lassen Said Valley Reservoir Comment
  HSC25433  Marsilea vestita D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19177 Lassen Harvey Valley near Cone Springs Comment
  CHSC36282  Matricaria occidentalis M. S. Taylor 1982-6-12 4651 Lassen Alkali flats 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
  CAS-BOT-BC282042  Melica fugax John Thomas Howell 1934-6-14 12167 Lassen Near Lost Lake, Warner Mountains 2438 Comment
  UC972186  Melica fugax Milo S. Baker 1952-4-24 12411 Lassen ca 15 mi e Chester (at old road quarry) Comment
  UC1158682  Melica stricta Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8468 Lassen 50 mi se Susanville 1371 Comment
  UC593538  Melica stricta E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1771 Lassen Red Rock 1280 Comment
  UCD88630  Melica subulata John Thomas Howell; Gordon H. True and Margaret Williams 1973-6-28 49438 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  JEPS121277  Melilotus officinalis Lowell Ahart, John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS63459  Mentha canadensis W. L. Jepson 1918-8-2 7784 Lassen on lower bench Long Valley Creek (1 mi below Boni Ranch house, Long Valley); Long Valley, on lower bench of Long Valley Creek 1371 Comment
  CHSC7655  Mentzelia albicaulis Beverley J. Wise 1969-5-18 66 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. 1524 Comment
  JEPS29743  Mentzelia albicaulis Rimo Bacigalupi and L. R. Heckard 1962-5-28 8498 Lassen 2.7 mi n Milford (along U.S. highway 395) 1219 Comment
  JEPS124816 Image available Mentzelia albicaulis Joe Ammirati 1964-6-30 70 Lassen N. of Susanville ca. 12.3 mi. on HW 139. Comment
  CHSC48605  Mentzelia congesta Vernon Oswald 1986-5-28 2054 Lassen Rd. 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  CHSC117298  Mentzelia dispersa Lowell Ahart; John Dittes 2016-7-13 21124 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 at the southern slope of Big Valley. 1289 Comment
  CHSC13851  Mentzelia dispersa J. Grove 1973-7-30 Lassen At Sugar Pine Basin. 1524 Comment
  JEPS94543  Mentzelia dispersa Vernon Oswald and Lowell Ahart 1997-6-24 8603 Lassen s of Susanville (on n side of Diamond Mountain at a stream on Forest Road 29N43, 3.5 mi e of Gold Run Road); Diamond Mountain, Forest Road 29N43 1655 Comment
  RSA712934  Mentzelia dispersa L. P. Janeway 2005-7-4 8470 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 1752 Comment
  RSA715543  Mentzelia dispersa L. Ahart 2005-6-1 s.n. Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  UC1121689  Mentzelia dispersa A. Simontacchi 1940-6-5 817 Lassen 8 mi wnw Harvey Valley; Halls Flat Quad. 1752 Comment
  UCD117218  Mentzelia dispersa Verne Grant; Irving Schneider 1947-8-1 8228 Lassen irrigation ditch running southwest into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
Read comments
Dec 5 2012
  CHSC66250  Menyanthes trifoliata Vernon H. Oswald; Lowell Ahart 1996-6-24 7890 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Locally abundant in shallow water on quaking bog athe the springs on the E side of the meadow. 1633 Comment
  CHSC66261  Micranthes oregana Vernon H. Oswald; Lowell Ahart 1996-6-24 7889 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. 1633 Comment
  CAS-BOT-BC322655  Microseris laciniata Elmer I. Applegate 1929-6-24 5879 Lassen Big Valley near Bieber Comment
  CHSC6206  Microsteris gracilis C. Palmiter 1946-6-20 Lassen Grasshopper Valley. Eagle Lake. 1624 Comment
  CHSC66254  Microsteris gracilis Vernon H. Oswald; Lowell Ahart 1996-6-24 7844 Lassen Papoose Meadows locaed ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau, Montane Meadow. 1633 Comment
  CHSC99150  Microsteris gracilis Lowell Ahart; John Dittes 2008-6-20 14929 Lassen Around 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
  SEINET10496963  Microsteris gracilis subsp. gracilis Mary Susan Taylor 1982-5-7 Taylor 4429 Lassen T22N R17E n/nw sec 5. Beckwourth Pass quad. Reno Jct and along old road paralleling Hwy 70, just e of Beck- wourth Pass, ca. 1/4 mi w of Hallelujah Jct on Hwy 395. Sagebrush Scrub; 5000 ft. 1524 Comment
  JEPS107307  Mimulus arvensis Lowell Ahart, John Dittes 2005-6-1 11900 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
  CDA41658  Mimulus breviflorus S. E. Schoenig 1998-7-5 98 -71 Lassen East side of Poison Lake, 50 meters west of Pitville Road, 1.8 miles northwest of Highway 44, east of railroad track and wet ditch. Comment
  UC1609383  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-6-14 5523 Lassen ca. 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd. (Lassen A1) at Sandy Beach on the w shore of lake, upper beach between the road and the lake); Eagle Lake 1566 Comment
  UCD122430  Mimulus breviflorus S. E. Schoenig 1998-7-5 98- 71 Lassen East side of Poison Lake, 50 meters W of Pitville Rd., 1.8 mi NW of Hwy 44. East of Railroad track. 1749 Comment
  RSA505419  Mimulus breviflorus Rimo Bacigalupi, S. Galen Smith 1957-6-28 5998 Lassen Ditches along U.S. Highway 395 on Madeline Plains, 3.1 miles south of Madeline 1616 Comment
  RSA252826B  Mimulus floribundus A. A. Heller 1938-6-22 15187 Lassen 1 mile south of Westwood. 1524 Comment
  JEPS10455  Mimulus guttatus W. L. Jepson 1939-8-11 19374 Lassen Milford 1280 Comment
  JEPS80678  Mimulus guttatus L. R. Heckard and T. I. Chuang 1981-6-10 5530 Lassen 13 1/2 mi s Adin (along highway 139) 1463 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
  UC1063127  Mimulus microphyllus A. Simontacchi 1940-6-15 861 Lassen 2.3 mi ssw Cone Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC773851  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  CDA38387  Mimulus nanus S. E. Schoenig 1998-7-5 98 -72 Lassen By south side of Highway 44, vicinity of Bogard Campground. Comment
  JEPS94106  Mimulus nanus Vernon H. Oswald and Lowell Ahart 1998-5-22 9118 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 1.1 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1447 Comment
  POM181073  Mimulus nanus var. mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  UC886157  Mimulus nanus var. mephiticus A. A. Heller 1938-6-22 15188 Lassen about 1 1/2 mi s Westwood 1524 Comment
  RSA60367  Mimulus nanus var. nanus E. K. Balls 1950-5-9 15952 Lassen 6 miles south of Milford, Hwy 395. 1296 Comment
  UC1136832  Mimulus primuloides subsp. primuloides George A. Fischer and Irwin H. Johnson 1933-7-14 F 243 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  UC1063104  Mimulus pulsiferae A. Simontacchi 1940-6-15 862 Lassen 2.3 mi ssw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1778582  Mimulus pulsiferae S. E. Schoenig 1998-7-5 98 -69 Lassen SW shore of Moll Reservoir, 2 meters from waters edge. 1499 Comment
  RSA536395  Mimulus pygmaeus Beth Corbin, Kim Earll, Steve Klukkert 1991-6-20 629 Lassen Gray's Valley, 4.5 miles N of USFS Bogard Work Center. 1715 Comment
  UC477503  Monardella glauca Geo. A. Fisher 1928-6-12 27 Lassen Lassen Forest 1615 Comment
  SEINET10498937  Monardella odoratissima Mary Susan Taylor 1974-1 Taylor 275 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC5270  Monardella odoratissima subsp. glauca W. Vinyard 1946-6-11 Lassen Pine Creek. 1580 Comment
  CHSC52767  Monardella odoratissima subsp. glauca L. P. Janeway 1990-7-4 3771 A Lassen Ca 0.9 mi NE of Meadowview Peak. 1981 Comment
  UC506902  Monardella odoratissima subsp. glauca George A. Fischer, Irwin H. Johnson 1933-7-21 F 279 Lassen Stringer Lassen Forest 1696 Comment
  CHSC118842  Monardella odoratissima subsp. pallida L. P. Janeway; B. Castro 2017-7-2 12340 Lassen Northern High Sierra Nevada. Along the crest of the Diamond Mtns 4.0 air-km west of Diamond Mtn; at the junction of skyline Motorway, Diamond Mtn Road, and Diamond Mtn Motorway. 2004 Comment
  CHSC29865  Monardella odoratissima subsp. pallida Robin L. Ondricek 1978-8-9 122 Lassen 1977 Burn, .1 mi w of intersection with road which passes Colman Lake. [Sanders 2010 annotation: Monardella odoratissima Benth. ssp. pallida X ssp. glauca.] 1889 Comment
  UC506977  Monardella odoratissima subsp. pallida George A. Fischer, Irwin H. Johnson 1933-7-12 F 225 Lassen Lassen Forest 1722 Comment
  RSA408689  Monardella odoratissima subsp. pallida Christopher Davidson 1974-7-24 2488 Lassen Ca. 4 mi W of Janesville on rd to Antelope Valley. 2134 Comment
  SEINET12319572  Monardella villosa Unknown 1975-1 53 Lassen NW side of Coleman Lake, ca 32m from lake's edge, ca 10.6 km NE of Susanville 1921 Comment
  JEPS114695  Monolepis nuttalliana Lowell Ahart, John Dittes 2002-6-20 14973 Lassen W of where the levee road crosses Big Valley Canal, in Big Valley, about 4 mi (air) NE of the Headquarters at Ash Creek State Wildlife Area, about 7 mi (air) NE of Bieber 1263 Comment
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Oct 5 2019
  SDSU5609  Monolepis nuttalliana D. F. Howe 1964-7-31 3903 Lassen Modoc National Forest 10.2 miles from entrance on road from Likely. 1768 Comment
  CAS-BOT-BC444693  Montia chamissoi Lassen 1927 G. S. Crew 1927-6-25 25 Lassen Lassen National Forest. Norval Flat 2051 Comment
  CHSC57311  Montia chamissoi Mary Meyer 1980-7-9 Lassen In Horse Camp Spring. 1706 Comment
  CHSC64849  Montia chamissoi Vernon H. Oswald 1995-6-26 6924 Lassen Ash Valley Rd. (Lassen 527), 7.1 mi w of Madeline. Locally bundant in shallow water in a rocky, roadside streamlet. 1712 Comment
  HSC95205  Montia chamissoi Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 542 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC77226  Montia fontana G. Schoolcraft 1995-5-16 2478 Lassen 2 mi. east of Bull Flat. Growing in spring. 1615 Comment
  JEPS120896  Montia linearis Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18736 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
  RSA122965  Montia linearis L. R. Short, Wm Gansberg 1936-6-8 s 392 Lassen Burgess Spring Exp. Range 1744 Comment
  RSA715990  Montia linearis L. Ahart, John Dittes 2005-6-2 11956 Lassen Along poor dirt road, 1 mile E of Anderson Ranch home, Long Valley, 4.5 miles air N of the intersection of Scott Road and Hwy 70, 6 miles NW of Hallelujah jct. 1426 Comment
  UC1609172  Montia linearis Vernon H. Oswald and Lowell Ahart 1993-6-28 5611 Lassen ne of Poiston Lake (on the sse flank of Harvey Mountain, n of Hwy 44 on Rd, 33N06, nne of Burgess Meadow); Harvey Mountain 1798 Comment
  UCD86509  Muhlenbergia andina Leo Whitney 1934-7-24 2195 Lassen Bridge Creek camp near Bridge Creek. 7-8 miles southwest of Eagle Lake, Lassen National Forest. 1737 Comment
  CHSC44580  Muhlenbergia asperifolia Lowell Ahart; John Thomas Howell 1974-7-9 519 Lassen In a meadow along the south shore of Eagle Lake. 1584 Comment
  RSA129384  Muhlenbergia filiformis H. S. Yates 1936-8-12 6018 Lassen Susanville. 1524 Comment
  UC1024685  Muhlenbergia filiformis Leo Whitney 1933-8-3 2160 Lassen ca 10 mi nw north end of Eagle Lake; Lassen National Forest, Sheepshead 1889 Comment
  UC163592  Muhlenbergia filiformis Milo S. Baker 1894-7-9 Lassen Pine Creek Comment
  UCD86724  Muhlenbergia filiformis L. Whitney 1935-6-21 3250 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  RSA256323  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-6-5 6238 Lassen Vicinity of Silver Lake, 22 miles NW of Susanville along Hwy 44 1768 Comment
  CAS-BOT-BC275083  Muhlenbergia richardsonis John Thomas Howell 1934-7-6 12449 Lassen Harvey Valley Comment
  UC1024739  Muhlenbergia richardsonis Leo Whitney 1933-8-3 3042 Lassen ca 8 mi nw Eagle Lake (on open flats); Lassen National Forest, Slate Creek 1920 Comment
  UCD86985  Muhlenbergia richardsonis L. D. Whitney 1935-6-23 s.n. Lassen Fruit Grower's Supply Company, Camp #10. Comment
  UCD86987  Muhlenbergia richardsonis L. Whitney 1933-8-3 3042 Lassen Slate Creek. 8 miles northwest of Eagle Lake, Lassen National Forest. 1920 Comment
  CHSC71134  Muilla transmontana Vernon H. Oswald; Lowell Ahart 1998-5-22 9133 Lassen Near the summit of the dirt road in the Fort Sage Mtns. 3.5 mi east of Fort Sage Rd., ca. 6 mi NE of Doyle. 1737 Comment
  CHSC7657  Muilla transmontana Beverley J. Wise 1969-5-3 145 Lassen 4.7 mi. east of junction with Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1615 Comment
  HSC63965  Muilla transmontana Teresa Prendusi 1980-5-8 Lassen Balls Canyon N of Shaffer Mtn. 6 mi. W of Hwy. 395 1372 Comment
  CAS-BOT-BC392249  Myosurus John Thomas Howell 1976-7-20 52033 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  UC1143006  Myosurus apetalus August L. Hormay 1934-5-14 Lassen Gray's Flat Well; Lassen National Forest 1706 Comment
  CHSC68868  Myosurus apetalus var. borealis Vernon Oswald; Lowell Ahart 1997-6-24 8651 Lassen South of Susanville just south of the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. In a meadow. 2249 Comment
  NY492651  Myosurus apetalus var. montanus N. H. Holmgren 1978-6-11 8913 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
  SEINET5338208  Myosurus aristatus M. J. Williams, G. Schoolcraft; A. Tiehm 1986-5-14 86- 38 -3 Lassen Tuledad Canyon Rd., from Duck flat to Ravendale. 0.1 mi W of Calif-Nev line. Comment
  CHSC107334  Myosurus minimus Lowell Ahart; John Dittes 2011-6-21 17526 Lassen Along the bottom of a small drainage, about 30 yards north of the road, between Elkins Lane and Walters Road, about 100 yards south of the old barn, 500 feet south of Modoc County Line, about 4.3 miles (air) west-southwest of Adin, about 7.3 miles (air) northeast of Bieber, Big Valley. 1268 Comment
  UC9325  Myosurus minimus M. S. Baker and Frank Nutting 1894-7-1 Lassen w side Dixey Mts Comment
  JEPS45716  Myriophyllum quitense W. L. Jepson 1918-8-16 8002 Lassen Merrillville 1524 Comment
  JEPS103172  Myriophyllum sibiricum G. Schoolcraft 1996-9-11 2565 Lassen Willow Creek below petroglyphs and above dam 1310 Comment
  JEPS96085  Myriophyllum sibiricum Vernon H. Oswald and Lowell Ahart 1996-9-10 8281 Lassen s.w Westwood (Mt. Meadows Reservoir, shallow water along R.R. embankment n.w. edge of reservoir); Mt. Meadows Reservoir 1539 Comment
  SEINET2055396  Myriophyllum sibiricum Arnold Tiehm, Gary Schoolcraft 1984-8-14 9243 Lassen Buckhorn Reservoir on the South side of Buckhorn road to Ravendale, about 6 road miles West of state line 1698 Comment
  POM312396  Myriophyllum sibiricum S. Galen Smith, Malcolm A. Nobs 1949-7-20 1049 Lassen 4 miles west of Adin. Comment
  SEINET7878178 Image available Nama lobbii Annetta Carter 1946-1 s.n. Lassen Altitude ca. 5500 feet; crest of ridge ten miles northeast of Susanville, Lassen County. 1676 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
  UC1609452  Navarretia breweri Vernon H. Oswald and Lowell Ahart 1993-6-14 5517 Lassen Eagle Lake rd (Lassen A1) ca 3 mi w Eagle Lake (0.5 mi sw of Spaulding Tract Rd (Rd 518, 33N89)) 1810 Comment
  CHSC4887  Navarretia capillaris Bill Wilson 1967-7-5 41 Lassen Collected at Eagle Lake Biological Station. 10 mi. N of Susanville, outside laboratory building. 1584 Comment
  RSA702598  Navarretia capillaris L. P. Janeway 2004-6-26 8148 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
  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
  CHSC26881  Navarretia divaricata K. R. Stern 1974-6-26 5863 Lassen 100 yds. s of Hwy. 44, 34 mi nw of Susanville. Meadow. Comment
  UC773937  Navarretia divaricata L. R. Short and Wm. Gansberg 1936-7-3 S- 473 Lassen Burgess Spring Experiment Range Lassen Forest 1844 Comment
  UC1058209  Navarretia divaricata subsp. vividior C. McMillan 1949-6-15 1541 Lassen 5 mi w Bieber Comment
  UCR119029  Navarretia intertexta Beecher Crampton 1954-7-6 2072 Lassen Modoc Plateau, 17 miles south of Ravendale along US highway 395. 1524 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
  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
  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
  UC423667  Navarretia intertexta subsp. propinqua David D. Keck 1930-7-23 952 Lassen 4 mi w Susanville; Sierra Nevada 1463 Comment
  CHSC1253  Navarretia leptalea 1951-7-8 Lassen Pit River. 1524 Comment
  RSA67608  Navarretia leptalea Verne Grant, Alva Grant 1950-7-13 8943 Lassen Camp Fredonyer, on road from Westwood to Susanville 1524 Comment
  SEINET3860229  Navarretia leucocephala subsp. leucocephala Leigh A. Johnson 2006-1 06 -147 Lassen Lassen Natl. Forest: south side of Champs Flat Road, east end of Champs flat, a little west of Dow Flat road.; 0 1693 Comment
  CAS-BOT-BC230387  Navarretia leucocephala subsp. minima James Jokerst 1983-7-24 1882 Lassen Near Madeline Plains 1614 Comment
  CHSC110909  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2012-7-9 18288 Lassen . Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. About 100 yards southeast of the tall poles. 1267 Comment
  CHSC34342  Navarretia leucocephala subsp. minima K. R. Stern 1974-6-26 5853 Lassen Ca. 0.2 mi n of Hwy. 44, on Pittville Rd. Comment
  CAS-BOT-BC230388  Navarretia leucocephala subsp. minima Peter H. Raven; Otto T. Solbrig 1958-6-17 13296 Lassen Along US Highway 395, 4.8 miles S of Madeline Comment
  UC1178962  Navarretia linearifolia subsp. linearifolia Herbert L. Mason Jul 29 1955-Jul 31 1955 14643 Lassen near Westwood Junction (railroad station 15 mi w Susanville) (southern Lassen County); w of Susanville, near Westwood Junction Comment
  UC1609451  Navarretia linearifolia subsp. linearifolia Vernon H. Oswald and Lowell Ahart 1993-6-28 5616 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  JEPS107402  Nemophila parviflora var. austiniae Lowell Ahart, John Dittes 2005-6-1 11898 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
  UC606944  Nemophila parviflora var. austiniae L. Constance 1938-6-10 2324 Lassen 0.5 mi w Fredonyer Pass (junction of Crazy Harry and Westwood--Susanville Roads); w of Fredonyer Pass 1676 Comment
  UC1609375  Nemophila pedunculata Vernon Oswald and Lowell Ahart 1993-5-12 5389 Lassen 1.6 mi se Pittsville Rd. (Hwy 44 between Poison Lake and A21 (to Westwood)); betw Poison Lake and A21 1719 Comment
  UCSC000580  Nemophila pedunculata L. R. Short, W. Gansberg 1936-6-8 393 Lassen Burgess Spring Experiment Range 1743 Comment
  UC20413  Neoholmgrenia andina Mrs. R. M. Austin and Bruce June 1898 2364 Lassen Shumway Comment
  CHSC44642  Nestotus stenophyllus J. D. Jokerst 1983-5-30 1795 Lassen Ca. 1.5 miles north of the north edge of Eagle Lake ca. 1.0 mile N of Eagle Lake Rd 50 meters west of Highway 139. Comment
  CHSC13791  Nicotiana attenuata Anne Linda Brisk 1969-7-10 45 Lassen 1/4 mi N of ELBS. 1554 Comment
  HSC21267  Nicotiana attenuata M. T. Milligan 1964-8-23 238 Lassen 400 yards E of Siad Valley Reservoir on Termo Rd. 1524 Comment
  UC7442  Nitrophila occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3326 Lassen Honey Lake Valley 1219 Comment
  CHSC54175  Nothocalais troximoides Vernon H. Oswald 1991-5-28 4627 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. East of the barn. 1264 Comment
  JEPS103174  Nothocalais troximoides G. Schoolcraft 1993-6-10 2295 Lassen S. 3of CR. 512, S. of Red Rock Lake 1828 Comment
  UC1609121  Nothocalais troximoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5529 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (on w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), dunes on upper beach between road and lake); Eagle Lake 1566 Comment
  UC584293  Nothocalais troximoides G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2309 Lassen w Milford; crest of range head of Stony Ridge 1950 Comment
  SEINET10729606  Nuphar lutea subsp. polysepala Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 845 Lassen Lassen National Forest, Almanor Ranger District. 0.25 miles west of Forest Service road 10 on Forest Service road 31N24. T31N R7E S26 SW 1/4. 1981 Comment
  CAS-BOT-BC171461  Oenothera boothii subsp. alyssoides Louella Bass 1982-6-20 s.n. Lassen Cemetery gate, McKissick Comment
  HSC31754  Oenothera cespitosa var. marginata Donald Spalinger 1974-5-16 65 Lassen E of Hurlong in the Doyle Winter Deer Range 1220 Comment
  JEPS124825 Image available Oenothera deltoides C. Meek 1969-7-8 68 Lassen Along Hi #395, 1 mi south of intersection to Herlong Army Depot, 8 mi. south of Milford. Comment
  UCD106858  Oenothera deltoides R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  UC1186579  Oenothera deltoides subsp. piperi G. I. Stage and R. W. Thorp 1959-6-19 59 -113 Lassen 7.2 mi se Milford Comment
  POM38743  Oenothera deltoides subsp. piperi Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  SEINET10491875  Oenothera deltoides subsp. piperi Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2591 Lassen Approx 6 mi s of susanville at jct of us hwy 395 and calif hwy 36 to susanville, near johnstonville. Assoc; purshia-artemesia. 1311 Comment
  NY998639  Oenothera deltoides var. piperi W. W. Eggleston 1911-5-29 6745 Lassen Vicinity of Doyle Station 393 Comment
  UC1186545  Oenothera elata subsp. hirsutissima J. W. MacSwain 1959-8-12 59 -147 Lassen 2 mi n Bridge Camp; Hat Creek Comment
  UC1562804  Oenothera elata subsp. hookeri Barbara Ertter 1987-7-24 7304 Lassen ca 3/4 mi ene Beckwourth Pass (at end of old crumbling paved rd) 1524 Comment
  UC874023  Oenothera flava subsp. flava C. L. Hitchcock 1940-5-26 6642 Lassen overflow of river 1 mi w Bieber; Pitt River Comment
  RSA0049672  Olsynium douglasii var. douglasii Dean Wm. Taylor 2012-5-15 21194 Lassen WindMill Flat vicinity; one mile north of the north end 1676 Comment
  CAS-BOT-BC349944  Onopordum acanthium T. C. Fuller 1958-7-8 898 -58 Lassen Highway 299, 0.1 mi. S. of Lassen County Line Comment
  CAS-BOT-BC349945  Onopordum acanthium O. Havens 1963-8-9 s.n. Lassen P. S. Hall ranch, Doyle Comment
  CDA36768  Onopordum acanthium D. B. Joley 1976-6-16 1 Lassen Grasshopper Lake, on Highway 139, 33 miles north of Susanville. 0 Comment
  UC1037281  Oreostemma alpigenum var. andersonii Leo Whitney 1934-9-16 1718 Lassen Bumpass Hell Lassen National Park 2529 Comment
  HSC93438  Oreostemma elatum Vernon H. Oswald 1996-8-1 8120 Lassen FS Rd. 28N56 (D-line), 2 mi. N of Dyer Mtn. Lookout, SSW of Westwood 1738 Comment
  HSC97139  Oreostemma elatum Martin J. Lenz 2005-7-20 2042 Lassen N slope od Dryer Mtn.; approx. 1.4 air mi. N of summit: Roseburg Resources Co. 1822 Comment
  CDA42001  Orobanche corymbosa T. C. Fuller 1980-8-5 20313 Lassen Along east side of Tuledad Road, 7.4 km. southeast of the campground on the east shore of Dodge Reservoir, northeast of Ravendale. 0 Comment
  CAS-BOT-BC500270  Orobanche uniflora subsp. occidentalis Doris Kildale Gillespie 1930-5-13 9368 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC500271  Orobanche uniflora subsp. occidentalis H. C. Cantelow 1941-5-22 s.n. Lassen 13.5 mi W of Susanville, at Fredonyer Pass Comment
  RSA516524  Orthocarpus campestris Helen-Mar Wheeler 1952-7-11 s.n. Lassen South of Madeline. Comment
  SD7034  Orthocarpus copelandii var. cryptanthus Mrs. R. M. Austin 1882-8-9 Lassen Hills - near Hot Spring, Val. Comment
  CHSC60858  Orthocarpus cuspidatus subsp. cryptanthus Vernon H. Oswald; Lowell Ahart 1993-6-28 5604 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  HSC63830  Orthocarpus cuspidatus subsp. cryptanthus Teresa Prendusi 1980-7-8 Lassen Grasshopper Ridge, 37 mi. N of Susanville off Hwy. 139, 5 mi. E of Grasshopper Valley 1738 Comment
  SEINET12329637  Orthocarpus hispidus N. H. Holmgren, Holmgren, P. K. 1980-1 9483 Lassen US 395, 7.4 km S of Ravendale 1620 Comment
  CHSC78408  Oryzopsis exigua Vernon H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 2000-6-18 9929 Lassen East-northeast of the lookout on Observation Peak located east of Ravendale. 2377 Comment
  POM82978  Osmorhiza berteroi Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  UC1483840  Osmorhiza berteroi G. Schoolcraft 1979-8-2 178 Lassen Tule Mountain; top, Bureau of Land Management 2133 Comment
  CHSC13864  Oxypolis occidentalis Mary Meyer 1973-7-7 20 Lassen Located at NE end of Murrer's Upper Meadow. 1572 Comment
  CAS-BOT-BC413245  Oxytheca dendroidea subsp. dendroidea Robert F. Hoover 1940-10-1 4656 Lassen Janesville Comment
  JEPS114621  Packera cana Lowell Ahart, John Dittes 2008-6-19 14877 Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  UC35980  Packera eurycephala var. eurycephala Mrs. C. C. Bruce June 1898 2176 Lassen Shumway Comment
  UC35987  Packera eurycephala var. eurycephala M. S. Baker and Frank Nutting 1894-7-2 Lassen Dixie Mts. Comment
  HSC18106  Paeonia H. E. Parks, S. T. Parks Jun 1928 223 Lassen Lassen National Park, Drakesbad 1768 Comment
  UC485769  Paeonia brownii H. E. and S. T. Parks June, 1928 223 Lassen Drakesbad Lassen National Park Comment
  CHSC112794  Panicum Lowell Ahart; John Dittes 2013-7-23 18909 Lassen On the east side of the gravel road, north-south road west of Big Canal, 0.76 mile north of State Highway 299, 4.9 miles (air) northeast of Bieber, Big Valley. 1257 Comment
  UC1258487  Pectocarya penicillata G. Schoolcraft 1980-5-8 231 A Lassen e Herlong; Bureau of Land Management 1219 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
  SBBG7089  Pedicularis attollens H. and M. Dearing 1938-7-1 2238 Lassen 12 mi W of Susanville Comment
  HSC20935  Pedicularis groenlandica H. E. Parks, S. T. Parks Jun 1928 251 Lassen Lassen National Park, Drakesbad 1677 Comment
  UC447220  Pedicularis groenlandica Franklin P. Nutting Lassen Pine Creek Comment
  JEPS3332  Pedicularis groenlandica George Gillett 1952-7-29 119 Lassen w slopes of Paradise Meadow; Lassen Volcanic National Park 2148 Comment
  UC506905  Pedicularis semibarbata George A. Fischer, Irwin H. Johnson 1933-7-19 F 272 Lassen Lassen National Forest 1737 Comment
  JEPS11489  Penstemon cinicola Jos. Grinnell 1928-6-26 Lassen Butte Lake 1889 Comment
  HSC68837  Penstemon deustus Gary Schoolcraft 1979-6-26 97 Lassen Small peak N of Radeo Flat 1951 Comment
  RSA516352  Penstemon deustus subsp. sudans Barbara Ertter 1987-6-16 7178 Lassen Skeedaddle Mtns on NE side of Honey Lake, below ridge 1 mile W of Hot Springs 1829 Comment
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Mar 25 2010
  CHSC57320  Penstemon gracilentus Mary Meyer 1980-7-21 Lassen 2072 Comment
  CHSC62007  Penstemon gracilentus Eenam Sin 1992-6-3 26 Lassen North east corner at the base of Gallatin Peak. 1524 Comment
  JEPS11274  Penstemon gracilentus Brown and Wieslander 1922-7-23 43 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  NY600695  Penstemon gracilentus G. H. True Jr. 1938-7-14 959 Lassen Summit on Milford Grade, just on north slope 1676.4 Comment
  RSA746506  Penstemon gracilentus K. M. Meyer, A. Townesmith 2007-7-23 157 Lassen Lassen National Forest. 3.9 miles SW on 32N10 off hwy. 44. (turn at rest area). 1900 Comment
  UC1583940  Penstemon gracilentus G. Schoolcraft 1990-7-9 2109 Lassen e slope of Tule Mtn. 1767 Comment
  NY600697  Penstemon gracilentus K. A. Vincent 1986-7-19 4382 Lassen Sierra Nevada, Roop Mountain; along CA A1 at Eagle Lake Summit, ca. 7.6 miles north of junction CA 36, ca. 7 air miles northwest of Susanville. 1932.4 Comment
  SEINET272361 Image available Penstemon gracilentus Karl Vincent, Charlott Labbe 1986-7-19 4382 Lassen Sierra Nevada Roop Mtn.; common in burned area in pine-spruce forest along CA A1 at Eagle Lake Summit ca 7.6 mi N of j 1932 Comment
  CHSC68881  Penstemon heterodoxus var. heterodoxus Vernon Oswald 1997-6-24 8643 Lassen South of Susanville near the samll pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  CHSC68882  Penstemon janishiae Vernon Oswald; Lowell Ahart 1997-6-24 8644 Lassen South of Susanville near the small pool on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  SEINET10548051  Penstemon miser Mary Susan Taylor 1974-1 Taylor 276 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC1063177  Penstemon neotericus H. P. Hagge 1929-9-12 30 Lassen Logan Mtn. Eagle Lake Quadrangle 1828 Comment
  SBBG28997  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen E of Westwood 1493 Comment
  SEINET10744553  Penstemon newberryi var. newberryi Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 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. T31N R7E S35 NW 1/4. 1980 Comment
  UCD13228  Penstemon oreocharis Janet Browder 1973-6-3 78 Lassen Lassen CO. Eagle Lake Recreation Area, Day Camp. Grassy area by lake. Elevation 5100 feet. 1554 Comment
  CHSC36485  Penstemon roezlii Margaret E. Halloran 1982-6-4 3 Lassen .5 mi e Murrers Upper Meadow on road to meadow. Comment
  CHSC36494  Penstemon roezlii Theresa Costa 1982-6-4 32 Lassen Ca. .5 mi e of Murrers Upper Meadow, heading towards meadow. Comment
  CHSC4912  Penstemon roezlii A. E. Anderson 1967-6-24 27 Lassen Abundant in soil on roadside leading to Murrer's Meadow, 1 mi. east of junction of road to Eagle Lake Biological Station. 1554 Comment
  NY650095  Penstemon roezlii N. H. Holmgren 1980-7-5 9523 Lassen Upper Smoke Creek drainage, 21.9 km (13.6 miles) from U.S. Highway 395 via Rye Patch Canyon, 24 km (15 miles) airline distance southeast of Ravendale. 1580 Comment
  NY650102  Penstemon roezlii J. T. Howell 1973-8-1 50205 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164.1 Comment
  POM195122  Penstemon roezlii D. D. Keck 1930-7-23 954 Lassen 12 miles west of Susanville. 1677 Comment
  NY641729  Penstemon roezlii A. J. Cronquist 1959-6-17 8470 Lassen 50 miles southeast of Susanville. 1371.6 Comment
  NY650123  Penstemon roezlii H. D. D. Ripley 1943-6-13 5671 Lassen South of Constantia 1463.0 Comment
  SEINET229582  Penstemon roezlii G. Schoolcraft 1982-6-16 701 Lassen N of Shimn Ranch 1548 Comment
  SEINET5329596 Image available Penstemon roezlii J. T. Howell, Gordon H. True; Wayne Dakan 1974-7-30 50689 Lassen S and SE of Diamond Mt., 2286 Comment
  UCD13169  Penstemon roezlii Janet Browder 1973-6-3 92 Lassen Lassen CO. Day Camp in Eagle Lake Recreation Area. Elevation 5000 feet. 1524 Comment
  CHSC27679  Penstemon rydbergii var. oreocharis J. D. Prouty 1978-7-27 28 Lassen W of Eagle L. in small swale just n of Rd 105 on E margin of Champs Flat. 1694 Comment
  CHSC4791  Penstemon rydbergii var. oreocharis R. Carter 1967-7-7 582 Lassen Collected at W end of reservoir. Deans Meadow, 6.3 mi S of Eagle Lake Biology Station. 1828 Comment
  NY651292  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-22 15182 Lassen 1 mile south of Westwood 1524.0 Comment
  UCD39133  Penstemon rydbergii var. oreocharis Beecher Crampton 1964-6-26 7081 Lassen 32 miles n.w. Susanville east end of Harvey Valley. 1694 Comment
  CHSC4438  Penstemon speciosus K. R. Stern 1967-6-30 2449 Lassen West Central side of 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
  UC1036208  Penstemon speciosus George W. Gillett July 1953 273 Lassen Fredonyer Pass Lassen National Forest, Fredonyer Pass (Highway 36) 1752 Comment
  CAS-BOT-BC239660  Penstemon sudans A. A. Heller 1938-6-23 15194 Lassen 2 miles east of Fredonyer Pass 1645 Comment
  CAS-BOT-BC239661  Penstemon sudans Francis W. Pennell 1940-6-9 25768 Lassen Route 36, west of Susanville 1371 Comment
  NY661798  Penstemon sudans F. W. Pennell 1940-6-9 25768 Lassen Route 36. Hill, west of Susanville 1371.6 Comment
  UC2027337  Penstemon sudans Anthony Baniaga and R. Bomberger 2011-7-28 478 Lassen Lassen National Forest. Highway 36, ca. 1/4 mi E of Fredonyer Pass Winter OHV Parking Lot Fredonyer Pass quadrangle 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
  UCD55297  Penstemon sudans Ellen Dean; Gary Schoolcraft 2006-5-16 3118 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. 1283 Comment
  SEINET5323636 Image available Penstemon sudans N. H. Holmgren, P. K. Holmgren 1978-6-12 8937 Lassen Rye Patch Canyon, 4.3 km (2.7 mi) E of U.S. Hwy 395, just above Ramhorn Campground, 14.5 km (9 mi) airline distrance SE of Ravendale 1740 Comment
  CDA26041  Peraphyllum ramosissimum T. C. Fuller, R. C. Bechtel, R. Bradley 1981-7-9 20382 Lassen On slope above the west side of Smoke Creek Reservoir. 0 Comment
  CHSC65998  Peraphyllum ramosissimum Vernon H. Oswald; Gary Schoolcraft 1996-5-11 7551 Lassen Modoc Plateau. Slope along the road to the pteroglyphs on the rim of Willow Creek N of Belfast (ca. 12 mi ENE of Susanville). 1280 Comment
  NY850108  Peraphyllum ramosissimum R. M. Austin 06 1898 2354 Lassen Comment
  RSA594173  Peraphyllum ramosissimum S. O. Mattoon 1974-6-2 42 Lassen Cottonwood Mountains: Vicinity of Dodge Res.; Lassen County Road 502. 1829 Comment
  CHSC29932  Perideridia bolanderi Robin Ondricek; Wesley Dempsey 1978-6-7 43 Lassen Lower Dry Lake. 1706 Comment
  HSC63926  Peritoma platycarpa Teresa Prendusi 1980-5-29 1108 Lassen Willow Creek, 2 mi. NE of Susanville on mesa tops 1357 Comment
  UCD149828  Persicaria amphibia Al Jennings 1963-7-10 s.n. Lassen Lassen County. Honey Lake Refuge. Comment
  JEPS25529  Phacelia adenophora Rimo Bacigalupi with Lincoln Constance 1959-6-16 7143 Lassen US Hwy 395 1/4 mi s junction of road to Smoke Creek (playa beside road) 1341 Comment
  UC604541  Phacelia adenophora C. W. Sharsmith 1938-7-18 3639 Lassen 3 mi s Termo; Madeline Plains Comment
  UCD84588  Phacelia adenophora J. DiTomaso 2010-7-2 s.n. Lassen 15 miles E of Hwy 395 on Smoke Creek Ranch Road. Three miles W of Nevada state line. Comment
  CHSC71089  Phacelia bicolor var. bicolor Vernon H. Oswald; Lowell Ahart 1998-5-22 9132 Lassen Near the summit of the dirt road in the Fort Sage Mtns. 3.5 mi east of Fort Sage Rd., ca. 6 mi NE of Doyle. 1737 Comment
  JEPS87427  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  UC1609410  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  CHSC91193  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11952 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
  CHSC93673  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11983 Lassen North side of a poor dirt road, 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. 1410 Comment
  JEPS107814  Phacelia heterophylla subsp. virgata Lowell Ahart, John Dittes 2005-6-2 11952 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
  UCD55292  Phacelia heterophylla subsp. virgata Ellen Dean; Gary Schoolcraft 2006-5-16 3113 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. 1274 Comment
  POM195121  Phacelia heterophylla subsp. virgata D. D. Keck 1930-7-23 956 Lassen Fifteen miles west of Susanville. 1524 Comment
  JEPS3192  Phacelia humilis Hilda W. Grinnell 1934-6-1 Lassen 8 mi sw Susanville (top of divide) 1950 Comment
  NY1057846  Phacelia humilis N. H. Holmgren 1980-7-4 9511 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 2190 Comment
  UC133087  Phacelia humilis T. S. Brandegee 1892-7-3 Lassen Susanville Comment
  UC1562814  Phacelia humilis Barbara Ertter with Gary Schoolcraft 1987-6-16 7196 Lassen saddle on e side Hot Springs Peak (ne side of Honey Lake); Skeedaddle Mountains 2194 Comment
  UC699731  Phacelia humilis Farris Farris 1936-6-5 Lassen Diamond Mountain 1828 Comment
  UCD120530  Phacelia humilis var. humilis Beecher Crampton 1960-6-18 5728 Lassen N.E. part of county; southern Warner Mtns., vicinity Blue Lake Ranch. Comment
  UCD120534  Phacelia humilis var. humilis Jack Major 1966-6-24 s.n. Lassen Above Blue Lake, Warner Mountains, Modoc National Forest, northeastern part of county (ca. 18 miles airline southeast of Likely). 1905 Comment
  CHSC5263  Phacelia imbricata 1944-7-6 Lassen Eagle Lake. Harvey Valley. 1694 Comment
  CAS-BOT-BC145034  Phacelia inundata John Thomas Howell 1934-7-8 12510 Lassen Spaldings resort, Eagle Lake Comment
  SBBG64994  Phacelia linearis S. W. Hutchinson -Jun-1925 395 Lassen Eagle Lake 1554 Comment
  NY1056436  Phacelia lutea var. glandulifera P. A. Munz 1947-5-19 11879 Lassen Highway 395 4 miles south of Madeline Comment
  HSC13645  Phacelia mutabilis M. T. Milligan 1964-7-16 134 Lassen 2 mi. N on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  CHSC60749  Phacelia ramosissima var. eremophila Vernon H. Oswald; Lowell Ahart 1993-6-14 5540 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
  UC107342  Phacelia ramosissima var. eremophila T. S. Brandegee 1892-6-29 Lassen Janesville Comment
  JEPS79143  Phacelia thermalis L. R. Heckard with R. Bacigalupi 1980-6-11 5245 Lassen along US 395 s Deep Creek crossing (11.3 mi n of Litchfield) 1463 Comment
  CHSC66740  Phalaris arundinacea Vernon H. Oswald; Lowell Ahart 1996-8-1 8108 Lassen Mountain Meadows Reservoir SW of Westwood. On the shore of the reservoir NE of Indian Ole Dam. 1539 Comment
  JEPS88429  Phalaris arundinacea Vernon H. Oswald and Lowell Ahart 1996-8-1 8108 Lassen receding shore of the Mountain Meadows Reservoir ne of Indian Ole Dam Mountain Meadows Reservoir (sw of Westwood); , ne of Indian Ole Dam 1539 Comment
  UCD89650  Phleum pratense L. Whitney 1933-8-1 s.n. Lassen Slate Creek. 1920 Comment
  JEPS91153  Phlox douglasii subsp. rigida Dean W. Taylor 1974-6-14 3715 Lassen Poison Lake, on Hwy 44 ca. 2 miles W from the junction with Pittville Road 1615 Comment
  CHSC23546  Phlox hoodii subsp. canescens Wayne O. Baum 1971-6-28 71 -35 Lassen S. slope of Gallatin Peak. 2042 Comment
  UC1567441  Phlox longifolia G. Schoolcraft 1989-5-16 1878 Lassen w of Rice Canyon Rd. (at base of Antelope Mtn.); Antelope Mtn. 1280 Comment
  CHSC4772  Phlox speciosa R. Carter 1967-6-27 563 Lassen Ca. 5 yds. off N side of Rd. Comment
  UC52648  Phlox speciosa subsp. occidentalis M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixie Mts. Comment
  NY963724  Phlox speciosa var. occidentalis W. W. Eggleston 1911-5-29 6733 Lassen Vicinity of Doyle Station 1290 Comment
  CHSC57489  Phlox stansburyi B. G. Clark 1987-4-15 23 Lassen Rocky knoll 1/4 mi sw of Lassen College adjacent and west of hwy 139. 1297 Comment
  CHSC71130  Phlox stansburyi Vernon H. Oswald; Lowell Ahart 1998-5-22 9114 Lassen Road to ORV parking area in Fort Sage Mtns. 0.6 mi east of Fort Sage Rd., ca 5 mi NNE of Doyle. 1402 Comment
  JEPS94127  Phlox stansburyi Vernon H. Oswald and Lowell Ahart 1998-5-22 9114 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts. 0.6 mi. e. of Fort Sate Rd.); Fort Sage Mts. 1402 Comment
  UC932052  Phlox stansburyi Verne Grant and Alva Grant 1947-5-5 7979 Lassen n of Honey Lake Valley Comment
  CHSC60669  Phoenicaulis cheiranthoides Vernon H. Oswald; Anne-Lise Feenstra 1993-4-17 5272 Lassen Near Wayman Barn at the W end of Hunt Rd., Ash Creek Wildlife Area, ca. 5 mi NE of Bieber. 1264 Comment
  CHSC68743  Phoenicaulis cheiranthoides Vernon H. Oswald; Lowell Ahart 1997-5-27 8490 Lassen East side of Hwy. 139 at a small farm pond 38.2 mi north of Susanville, 7.4 mi north of Eagle Lake Rd. At a pullout along the highway. 1627 Comment
  UC465863  Phoradendron densum Milo S. Baker 1900-7-6 Lassen s. side Dixey Mts. Comment
  UC1037196  Phyllodoce breweri Leo Whitney 1934-9-16 1518 Lassen Lassen National Park, nw edge of Bumpass Hell Bumpass Hell; Lassen National Park, Bumpass Hell 2560 Comment
  UC21954  Phyllodoce breweri M. S. Baker and Frank Nutting 1894-7-20 Lassen Silver Lake Comment
  UC74048  Picrothamnus desertorum J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley, Amedee Comment
  RSA772875  Pilularia americana R. F. Thorne, Larry E. DeBuhr 1975-8-22 47209 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CHSC84894  Pinus contorta subsp. murrayana L. P. Janeway; B. Castro 2003-10-5 8006 Lassen High Cascade Range. Cone Lake and trailhead parking area (trail 1.3 km southwest into Caribou Wilderness Area). 2055 Comment
  CHSC23508  Pinus jeffreyi Wayne O. Baum 1971-7-16 71 -74 Lassen E. slope of Gallatin Peak. 2072 Comment
  SEINET11610302  Pinus jeffreyi David Charlet 1996-7-8 2288 Lassen Diamond Mountains, Sierra NV, Great Basin drainage (Honey Lake); East Canyon (Milford Grade); at Laufman Campground 1620 Comment
  UCR67404  Pinus jeffreyi George K. Helmkamp 1990-10-4 M 13 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 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
  CAS-BOT-BC80047  Pinus washoensis John Thomas Howell 1969-8-7 45886 Lassen Between Butte Lake and Cinder Cone Comment
  POM204143  Plagiobothrys bracteatus J. T. Howell 1934-7-10 12540 Lassen Patterson Flats Comment
  RSA123889  Plagiobothrys bracteatus A. Simontacchi 1940-5-14 715 Lassen 10.2 miles east of Coyote Springs 1700 Comment
  JEPS120895  Plagiobothrys cusickii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18772 Lassen About 300-400 yards NW of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. 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-BC224973  Plagiobothrys hispidulus John Thomas Howell 1934-7-10 12549 Lassen Long's [Longs] Well Comment
  JEPS107444  Plagiobothrys kingii var. harknessii Lowell Ahart, John Dittes 2005-6-1 11891 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
  UC1537689  Plagiobothrys leptocladus Gordon H. True Jr. 1936-6-25 522 Lassen Honey Lake Valley 1219 Comment
  JEPS124369  Plagiobothrys stipitatus var. micranthus Lowell Ahart, John Dittes 2015-7-13 20319 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UCD55159  Plagiobothrys tenellus Ellen Dean 2006-5-15 3047 Lassen E of town of Susanville. Along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. 1248 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
  POM73080  Plagiobothrys torreyi Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  UCD124605  Plantago lanceolata P. B. Schultz 1967-7-11 70 Lassen 1 mile south of Milford on U.S. Highway 395. 1325 Comment
  HSC95289  Platanthera dilatata var. leucostachys Gordon Leppig, J. Cromwell 1997-7-26 602 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC96724  Platanthera leucostachys Gordon Leppig 1998-7-12 941 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  UC1924583  Plectritis brachystemon Debra Valov 2006-5-28 2006012 Lassen Bieber off County Rd. A2 c. 12 km east of Hwy 299 1279 Comment
  CHSC4942  Plectritis macrocera W. Lessig 1967-5-23 16 Lassen Coll. ca. 200 yds. ne of Eagle Lake Biology Station. 1524 Comment
  RSA433737  Plectritis macrocera Christopher Davidson 1975-6-7 2754 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  SEINET10550970  Plectritis macrocera Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3116 Lassen 6 miles n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon Pine, jeffery pine along high ridge and in sandy wash. 1402 Comment
  CHSC31979  Pleiacanthus spinosus L. Ahart 1974-7-9 547 Lassen Along Hwy 395, 1 mi n of jct of Hwys 395 and 70. 1524 Comment
  CHSC7736  Pleiacanthus spinosus Beverley J. Wise 1969-5-23 79 Lassen 33.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  HSC79990  Pleiacanthus spinosus William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UC1069840  Pleiacanthus spinosus H. S. Yates 1936-8-11 6064 Lassen near Milford; Amedee Quad. 1280 Comment
  RSA273386  Poa J. P. Smith, J. O. Sawyer 1971-5-22 4655 Lassen 4 miles west of Susanville on State Route 44. Comment
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May 9 2012
  RSA484154  Poa J. P. Smith, J. O. Sawyer 1971-5-22 4655 Lassen 4 miles west of Susanville on State Route 44. Comment
  UCD92181  Poa J. B. Davy 17-24 Jun 1897 3319 Lassen Honey Lake Valley. Byer's Ranch. Comment
  CAS-BOT-BC255679  Poa bolanderi Clare B. Hardham 1971-8-22 18912 Lassen Diamond Mountain 2133 Comment
  RSA719872  Poa compressa M. A. Vincent, K. Levings 2006-7-29 12903 Lassen Along Rte. 36, 14.3 miles west of Susanville Comment
  UC1024837  Poa cusickii subsp. cusickii Leo Whitney 1935-6-10 3219 Lassen Camp 10 Fruit Grower's Supply Company Comment
  CDA2366  Poa pratensis A. A. Beetle 1941-6-28 2797 Lassen 10 miles west of Chester. Comment
  UC1142935  Poa pratensis subsp. pratensis A. L. Hormay 1941-6-23 15 Lassen Burgess Spring 1676 Comment
  UC60738  Poa pratensis subsp. pratensis M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  POM267991  Poa secunda D. D. Keck 1944-7-8 5449 Lassen 1.5 mi W. of Susanville, on rim of plateau overlooking Susan River canyon 1341 Comment
  RSA647530  Poa secunda Marion P. Harthill 1972-6-17 820 Lassen Madeline. 1677 Comment
  UCD90275  Poa secunda A. A. Beetle 1941-6-28 2794 Lassen 10 miles W of Chester, rte 36. Comment
  CAS-BOT-BC251087  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49460 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC77270  Poa secunda subsp. juncifolia G. Schoolcraft 1994-7-6 2350 Lassen About 1.5 miles NE of Red Rock Lake. 2042 Comment
  UC1024690  Poa secunda subsp. juncifolia Leo Whitney 1933-7-15 2155 Lassen ca 16 mi w of upper end Eagle Lake (Harvey Mt); Lassen Nat'l Forest 1981 Comment
  UC1024831  Poa secunda subsp. juncifolia Leo Whitney 1935-6-12 3229 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1037123  Poa secunda subsp. juncifolia Leo Whitney 1935-6-23 3285 Lassen near Camp 10 Fruit Grower's Supply Company 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
  UC1137292  Poa secunda subsp. juncifolia K. E. Bradshaw 1939-5-27 236 Lassen Plot 39-1 Black Mt Experimental Forest; Lassen Nat'l Forest, Halls Flat Quadrangle 1752 Comment
  UCD32661  Poa secunda subsp. juncifolia Beecher Crampton 1954-7-5 2057 Lassen 4.5 miles W of Susanville, along Hwy 36. 1432 Comment
  CAS-BOT-BC251088  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49189 Lassen Elysian Valley northwest of Janesville 1325 Comment
  SEINET7294025 Image available Poa secunda subsp. juncifolia Leo Whitney 1935-1 3259 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  JEPS127637  Poa secunda subsp. nevadensis Alejandro Brambila, Michael Dolan 2016-6-27 CA 320 -151 Lassen Northwest of Madeline Plains up Anderson Canyon to Spooner Reservoir. Comment
  CAS-BOT-BC236181  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49196 Lassen Elysian Valley NW of Janesville 1325 Comment
  UC1024933  Poa secunda subsp. secunda Leo Whitney 1935-6-28 3344 Lassen Bieber Comment
  UC1132871  Poa secunda subsp. secunda A. Simontacchi 1940-5-28 784 Lassen 3.2 mi wsw Patterson Mt; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC1132877  Poa secunda subsp. secunda K. E. Bradshaw 1939-5-27 236 Lassen Black Mt Experimental Forest, center of Plot 39-1 Black Mt Experimental Forest; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC1136989  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 219 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen Nat'l Forest 1722 Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  UCD80867  Pogogyne floribunda Robert E. Preston 2007-7-8 2570 Lassen Big Valley Mtns, 0.4 mi NE of Big Valley Summit, along Hwy 299. 1396 Comment
  HSC95275  Polemonium occidentale Gordon Leppig 1998-7-12 949 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC23986  Polemonium occidentale subsp. occidentale M. S. Baker and Frank Nutting 1894-7-31 Lassen Bridge Creek Comment
  CAS-BOT-BC74171  Polyctenium fremontii Gary Schoolcraft 1984-7-9 1287 Lassen On s. south of Fillman Road 3.8 miles west of Highway 395. 1609 Comment
  RSA340001  Polyctenium fremontii Gary Schoolcraft 1984-7-9 1287 Lassen South of Fillman Road, 3.8 miles west on Hwy 395 1610 Comment
  SD131676  Polyctenium fremontii Arnold Tiehm, Margaret Williams, Jan Nachlinger 1988-6-2 11703 Lassen 6.6 miles north of the Wendel Road on Highway 395 from Susanville to Alturas. 1349 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
  CHSC117761  Polygala subspinosa Virginia Dains; Joanne Crawford 2016-6-14 Lassen Modoc Plateau. BLM Eagle Lake Field Office. 20 km northeast of Skedaddle Mtns, 11 km east of Highway 395, 1.5 km north of Smoke Creek Ranch Road. 1432 Comment
  CHSC4777  Polygonum R. Carter 1967-6-27 556 Lassen Ca. 100 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 Comment
  UC1536797  Polygonum amphibium var. emersum Gordon H. True Jr. 1939-7-6 1038 Lassen George Bailey Ranch Honey Lake Valley Comment
  CHSC117541  Polygonum aviculare Lowell Ahart; John Dittes 2016-7-13 21133 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 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. 1289 Comment
  SBBG61490  Polygonum californicum E. Rockwell -Jun-1925 884 Lassen Eagle Lake 1554 Comment
  CAS-BOT-BC414487  Polygonum douglasii G. Schoolcraft 1989-6-19 1918 Lassen Ash Valley RNA/ACEC Comment
  CAS-BOT-BC414488  Polygonum douglasii W. R. Dudley 1893-6-23 s.n. Lassen Castle Lake Trail, near Mt. Shasta Comment
  UC773925  Polygonum douglasii subsp. douglasii L. R. Short and J. Warren July, 1936 S- 420 Lassen Burgess Spring Experiment Range 1856 Comment
  HSC100804  Polygonum douglasii subsp. spergulariiforme Lowell Ahart, John Dittes 2010-7-31 16979 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, 8.4 (air) mi. SE of Adin. 1521 Comment
  JEPS104432  Polygonum douglasii subsp. spergulariiforme Lowell Ahart 2003-8-17 10515 Lassen On the west side of the paved road, on the east side of Highway 36, ca 1/4 mile southwest of the Susan River, ca 8 miles (air) southwest of Susanville. 1433 Comment
  JEPS46148  Polygonum douglasii subsp. spergulariiforme Duncan Dunning 1921-8-11 Lassen 3 mi s Antelope Mountain (sw of Eagle Lake); Martin Spring Comment
  JEPS28705  Polygonum minimum George W. Gillett 1957-7-28 931 Lassen draw 1 mi above Butte Lake (on Widow Lake Trail); Lassen Volcanic National Park 1905 Comment
  UC1603209  Polygonum polygaloides J. Guardino 1993-6-9 281 B Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CHSC66256  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald; Lowell Ahart 1996-6-24 7856 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Locally abundant near a ditch on the W side of the meadow ca. 0.3 mi S of the cabins. 1633 Comment
  CHSC99126  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes 2008-6-22 15038 Lassen About 220 yards northwest 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
  CAS-BOT-BC419904  Polygonum polygaloides subsp. kelloggii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50649 Lassen Slope south and southeast of Diamond Mt. 2286 Comment
  JEPS97417  Polygonum ramosissimum Vernon H. Oswald and L. Ahart 1995-6-19 6880 Lassen T30N R15E center Sect. 22, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395 1383 Comment
  CAS-BOT-BC420145  Polygonum ramosissimum subsp. ramosissimum John Thomas Howell 1934-7-8 12501 Lassen Spalding's, Eagle Lake Comment
  JEPS51302  Polygonum sawatchense subsp. oblivium Brown and Wieslander 1922-7-23 54 Lassen Martin Sprs. Eagle Lake Comment
  UC506934  Polygonum sawatchense subsp. oblivium George A. Fischer and Irwin H. Johnson 1938-7-14 F 248 Lassen Lassen National Forest 1767 Comment
  CDA22787  Polygonum spergulariiforme L. Ahart 2003-8-17 10515 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. Comment
  CAS-BOT-BC232546  Polypogon monspeliensis Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16346 Lassen Along margin of drainage gulley below reservoir, N of road 13.5 miles E of Susanville Comment
  CAS-BOT-BC232547  Polypogon monspeliensis Louella Bass 1982-6-20 s.n. Lassen 0.5 mile W of Karlo Comment
  SEINET10661618  Polypogon monspeliensis Lowell Ahart, John Dittes 2005-6-2 Ahart 11967 Lassen T23N, R17E, southwest 1/4 Section 10. 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
  CHSC113811  Porterella carnosula Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18727 Lassen 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
  CHSC29937  Porterella carnosula Robin L. Ondricek 1978-6-22 68 Lassen A the NE edge of Mahogany Lake. 2057 Comment
  JEPS103627  Porterella carnosula Lisa Schultheis 1995-6-27 224 -95 Lassen large vernal pool at corner of 33N56Y and 33NO6. W of Champs Flat Comment
  UC1483818  Porterella carnosula G. Schoolcraft 1980-7-16 318 Lassen Nelson Corral Reservoir 1804 Comment
  SEINET12329667  Porterella carnosula N. H. Holmgren, Holmgren, P. K. 1980-1 9463 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi.) S of Madeline, T36N, R13E, S9 1620 Comment
  SJSU3186  Porterella carnosula R. L. Fisher 1958-6-16 s.n. Lassen six miles south of Madeline, Madeline Plains, northeastern Lassen County 1615 Comment
  CAS-BOT-BC452094  Potamogeton amplifolius Verne Grant; Irving Schneider 1947-8-24 8269 Lassen Northwest shore of Blue Lake, Northern Lassen County. Comment
  UCD138219  Potamogeton amplifolius Gordon Leppig 1998-8-18 1064 Lassen Modoc National Forest; Blue Lake. Lake shore south of camp ground. 1859 Comment
  CHSC60933  Potamogeton diversifolius Vernon H. Oswald; Lowell Ahart 1993-7-8 5666 Lassen Pittville Rd. (Lassen 111, 36N01) 2.4 mi N of Hwy. 44, on the NE edge of Poison Lake. 1705 Comment
  JEPS109625  Potamogeton diversifolius Dean W. Taylor 2002-6-21 18177 Lassen stock pond ca. 1 mile SW of McCleland Reservoir 1584 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
  CHSC100538  Potamogeton foliosus Daniel B. Marcum 2007-7-25 Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  UCD58790  Potamogeton foliosus 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
  JEPS95173  Potamogeton gramineus Vernon H. Oswald and Lowell Ahart 1996-6-24 7876 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), in Papoose Creek where it leaves the n end of the meadow, Modoc Plateau); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1100075  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-8-1 8243 Lassen e end of Tule Lake Comment
  CAS-BOT-BC453913  Potamogeton pectinatus Arnold Tiehm; Gary Schoolcraft 1984-8-14 9246 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line 1698 Comment
  SEINET3893473  Potamogeton 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.; 0 1698 Comment
  CAS-BOT-BC454090  Potamogeton pusillus subsp. tenuissimus Wm. Anderson 1960-6-16 s.n. Lassen Barrow pit along county road 1 mi. nw. of Tanner Ranch, Honey Lake Valley Comment
  CAS-BOT-BC454091  Potamogeton pusillus subsp. tenuissimus Verne Grant; Irving Schneider 1947-7-31 8212 Lassen Northeast quarter of George Williams section 19, Madeline Plain Comment
  CHSC76030  Potamogeton richardsonii Vernon H. Oswald 1999-8-4 9833 Lassen Mountain Meadows Reservoir southwest of Westwood. Along the edge of the reservoir. 1539 Comment
  UC60849  Potamogeton striatus J. B. Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley, Amedee Comment
  UC60851  Potamogeton striatus J. Burtt Davy Jun 17 1897-Jun 24 1897 3357 Lassen marsh near Amedee; Honey Lake Valley Comment
  UC1598197  Potentilla basaltica G. L. Clifton 1988-7-20 18126 Lassen near Ash Valley; Likely Quad., near Ash Valley 1541 Comment
  POM312882  Potentilla biennis Verne Grant 1947-7-30 8189 Lassen South point of west embayment, Tule Lake. Comment
  JEPS44188  Potentilla fruticosa Brown and Wieslander 1922-7-25 4 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  CHSC5044  Potentilla glandulosa subsp. nevadensis L. B. Barlow 1967-7-4 87 Lassen 5 mi s of Eagle Lake Biological Station on Gallatin Beach Road. 1737 Comment
  UC1136905  Potentilla gracilis George A. Fischer and Irwin H. Johnson 1933-7-12 F 208 Lassen Grass Valley Lassen National Forest, Grass Valley 1700 Comment
  POM34036  Potentilla gracilis var. elmeri Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  SEINET6637685  Potentilla gracilis var. fastigiata C. G. Gulling 1905-1 1529 Lassen Big Meadows Comment
  CAS-BOT-BC540366  Potentilla gracilis var. fastigiata B. Bartholomew; B. Anderson 1988-6-25 4373 Lassen Warner Mountains 2080 Comment
  CAS-BOT-BC540367  Potentilla gracilis var. fastigiata David D. Keck 1930-7-23 956 b Lassen 3 miles east of Westwood 1524 Comment
  CAS-BOT-BC540368  Potentilla gracilis var. fastigiata David D. Keck 1930-7-23 956 b Lassen 3 miles east of Westwood 1524 Comment
  CHSC4758  Potentilla millefolia R. Carter 1967-7-14 614 Lassen Hog Flat Reservoir, between highway 92 and shore of reservoir. Comment
  HSC101096  Prunus andersonii C. Dow, D. Garrison 2008-5-3 Lassen OHV Trailhead and Trail to Indian Springs 1439 Comment
  RSA60357  Prunus andersonii E. K. Balls 1950-5-9 15947 Lassen 6 miles south of Doyle, Hwy 395. 1372 Comment
  SEINET3157217  Prunus andersonii E. K. Balls 1950-5-9 15947 Lassen 6 mi S of Doyle, hwy 395 1372 Comment
  CDA34466  Prunus andersonii B. Villegas 2011-3-26 s.n. Lassen Hallelujah Junction. NE corner of HWY 395 & HWY 70 intersection. 0 Comment
  JEPS27652  Prunus emarginata W. L. Jepson 1918-8-2 7788 Lassen Long Valley 1371 Comment
  UCD113178  Prunus emarginata Donna Allen 1977-4-20 s.n. Lassen Jamesville grade 1 mile off Highway 89. Comment
  SEINET3850947  Prunus virginiana Dwayne Estes 2004-1 06028 Lassen SE side of Horse Lake along E roadside 1554 Comment
  CHSC7721  Prunus virginiana var. demissa Beverley J. Wise 1969-5-18 192 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. On canyon wall. 1554 Comment
  JEPS88231  Prunus virginiana var. demissa Vernon H. Oswald and Lowell Ahart 1996-6-17 7767 Lassen 7 mi w of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Highway 36, on the n side of Hwy 36 0.2 mi e of the 7 Mile Post); Modoc Plateau, Bizz Johnson Trail 1432 Comment
  UC773874  Prunus virginiana var. demissa L. R. Short, Wm. Gansberg 1936-7-3 S 466 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1847 Comment
  CAS-BOT-BC239806  Pseudoroegneria spicata James Moffitt 1941-5-14 s.n. Lassen Near Gilman Springs, 6 mi. ssw. of Karlo 1417 Comment
  POM267992  Pseudoroegneria spicata subsp. spicata D. D. Keck 1944-7-9 5450 Lassen 1.5 miles W. of Susanville on rim of plateu overlooking Susan River Canyon 1341 Comment
  UC1483808  Pseudoroegneria spicata subsp. spicata P. Bousier May 1979 Lassen n of Wendel (ner Brubeck Spring) 1554 Comment
  UC188856  Pseudoroegneria spicata subsp. spicata Milo S. Baker Lassen s side of Dixie Valley Dixie Valley Comment
  CHSC60878  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald; Lowell Ahart 1993-7-8 5671 Lassen Halls Flat Rd. (33N18), 1.4 mi SSW of Pittville Rd. (Lassen 111, 36N01), ca. 5.4 mi (air) NW of Poison Lake. On the W side of the road. 1694 Comment
  CAS-BOT-BC361752  Psilocarphus brevissimus var. brevissimus Clarence R. Quick 1962-6-17 62 25 B Lassen Swains Hole, a man-made pond in sagebrush south of Blacks Mountain Experimental Station 1554 Comment
  NY702518  Psoralidium lanceolatum H. D. D. Ripley 1944-5-29 5952 Lassen North of Doyle 1341 Comment
  POM76944  Pterospora andromedea Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CAS-BOT-BC460510  Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen About a mile E of Westwood 1524 Comment
  CHSC77267  Puccinellia distans G. Schoolcraft 1993-6-1 2270 Lassen Coyote Spring. 1463 Comment
  POM313139  Puccinellia distans Malcolm A. Nobs, S. Galen Smith 1949-7-22 1070 Lassen Northeast shore of Eagle Lake Comment
  SACT002065  Puccinellia distans Malcolm Nobs, Galen Smith 1949-7-22 Lassen Growing in wet mud, on drying shore, alkaline. Northeast shore of Eagle Lake Comment
  SEINET4890224  Puccinellia lemmonii N. H. Holmgren, P. Holmgren 1978-6-13 8939 Lassen 2.7 km (1.7mi) north-west of Wendel. 1250 Comment
  CHSC12423  Purshia tridentata Anne Linda Brisk 1969-6-20 8 Lassen 5.5 mi S of ELBS on Dean's Ridge Road. 1920 Comment
  CHSC1588  Purshia tridentata V. Holt 1935-5-31 Lassen Near Susanville. 1310 Comment
  HSC79989  Purshia tridentata var. tridentata William Rothstrom 1975-6-9 Lassen Johnstonville, 1/4 mi. S of Hwy. 395, W of airport. 1265 Comment
  RSA152670  Purshia tridentata var. tridentata Dorothy Wiggins 1961-6-10 16321 Lassen Along California Highway 36. ABout 6 miles W of Susanville. Comment
  UC1137303  Purshia tridentata var. tridentata George A. Fischer and Irwin H. Johnson 1933-7-12 F 212 Lassen Lassen National Forest 1722 Comment
  UC773873  Purshia tridentata var. tridentata L. R. Short and Wm. Gansberg 1936-7-9 S- 482 Lassen Burgess Spring Experimental Range; Lassen National Forest 1792 Comment
  CAS-BOT-BC462880  Pyrola asarifolia Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville, Perkin's Ranch 2133 Comment
  CAS-BOT-BC462881  Pyrola asarifolia George W. Gillett 1957-7-24 900 Lassen Lassen Volcanic National Park: Cameron Meadow 1950 Comment
  CHSC6238  Pyrola dentata P. Balch 1955-7-26 Lassen Roadside pine forest between Eagle Lake and Pittville road. 1676 Comment
  RSA0084884  Pyrola picta Christopher Davidson 1974-7-24 2485 Lassen Ca. 4 mi W of Janesville on rd to Antelope Valley. 2134 Comment
  UC412673  Pyrola picta Franklin P. Nutting Jul 1928 Lassen Mts. S of Eagle Lake Comment
  RSA46867  Pyrola picta subsp. dentata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CHSC60880  Pyrrocoma carthamoides var. cusickii Vernon H. Oswald; Lowell Ahart 1993-7-8 5667 Lassen Pittville Rd. (Lassen 111, 36N01) 3.0 mi N of Hwy. 44, NE of Poison Lake. 1709 Comment
  UC1332443  Pyrrocoma carthamoides var. cusickii Ralph K. Gierisch 1968-7-11 3342 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  CHSC58834  Pyrrocoma hirta var. lanulosa Vernon H. Oswald; Lowell Ahart 1992-7-16 5129 Lassen Feather Lake on the S side of Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), ca. 0.4 mi E of Champs Flat Rd. (County Rd. 105, Forest Rd. 32N02), between Old Station and Susanville. On the margin of the lake. 1749 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
  JEPS109778  Pyrrocoma lucida Dean W. Taylor 2002-8-10 18309 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 Comment
  RSA88088  Pyrrocoma racemosa var. paniculata J. T. Howell 1951-8-20 28227 Lassen Honey Lake Valley near Herlong 1280 Comment
  UCD46065  Quercus garryana var. garryana James Griffin 1964-8-4 1272 Lassen Along County road from Little Valley to Dixie Valley, Lassen County, California. 1341 Comment
  JEPS107803  Quercus kelloggii Lowell Ahart, John Dittes 2005-6-2 11942 Lassen Along a small stream, 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 1601 Comment
  RSA67201  Quercus kelloggii P. A. Munz 1951-9-15 16986 Lassen On dry flats, 6 mi west of Bieber. 1341 Comment
  UC735118  Quercus kelloggii Lincoln Constance 1946-7-3 3096 Lassen 2 mi nw Milford (near Honey Lake) 1280 Comment
  UCD46729  Quercus kelloggii Verne Grant 1947-9-7 8400 Lassen Along Highway 395 west of Honey Lake, several miles south of Janesville, Lassen County, California. Comment
  CAS-BOT-BC380420  Ranunculus alismifolius var. hartwegii John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49214 Lassen Elysian Valley northwest of Janesville Comment
  CHSC23897  Ranunculus aquatilis var. capillaceus George Ellmore 1973-7-7 7318 Lassen In bottom of Dixie Springs. 1581 Comment
  POM172668  Ranunculus aquatilis var. capillaceus Franklin Nutting 1894-7-25 s.n. Lassen Eagle Lake Comment
  UC1594639  Ranunculus aquatilis var. capillaceus Vernon H. Oswald and Lowell Ahart 1992-7-16 5121 Lassen w Cinder Pit (on logging road paralleling e side of creek, 1.3 mi n of Hwy 44 and McCoy Flat Reservoir, btween Old Station and Susanville); Bridge Creek 1719 Comment
  RSA125295  Ranunculus aquatilis var. capillaceus Peter H. Raven 1958-6-19 13256 Lassen A pond along hwy 395, 7.1 miles W of Standish. Comment
  CHSC65319  Ranunculus aquatilis var. diffusus Vernon H. Oswald; Lowell Ahart 1995-8-14 7185 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. In roadside pond. 1645 Comment
  CAS-BOT-BC379022  Ranunculus aquatilis var. diffusus Peter H. Raven; Otto T. Solbrig 1958-6-17 13256 Lassen in a pond along United States Highway 395, 7.1 mi west of Standish Comment
  CHSC4982  Ranunculus cymbalaria R. Clicquennoi 1967-6-24 53 Lassen In meadow, 4 mi e of Eagle Lake Biological Station at Murrer's Upper Meadow. 1524 Comment
  UC1745660  Ranunculus cymbalaria var. saximontanus Annetta M. Carter 1945-9-30 1723 Lassen Sam Webb place near end of Eagle Lake; ; Sam Webb place near end of Eagle Lake. 1554 Comment
  UC9428  Ranunculus cymbalaria var. saximontanus J. Burtt Davy Jun 17 1897-Jun 24 1897 3332 Lassen Honey Lake Valley 1219 Comment
  CHSC60391  Ranunculus flammula var. ovalis Mary Ann Showers 1992-6-13 2549 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  UC1136880  Ranunculus glaberrimus L. R. Short 1936-4-28 S- 338 Lassen Burgess Spr. Exp. Range Lassen National Forest 1737 Comment
  UC72019  Ranunculus glaberrimus Milo S. Baker 1890-1 Lassen Milford Comment
  CHSC25560  Ranunculus glaberrimus var. ellipticus Robert A. Schlising 1977-4-2 3185 Lassen Along dirt road, east of Eagle Lake Field Station. 1584 Comment
  CHSC108009  Ranunculus macounii Lowell Ahart; John Dittes 2011-6-21 17536 Lassen 335 feet northwest of Big Valley Canal, 2.1 miles (air) south of County Road 87, 6.6 miles (air) northeast of Bieber, 7.9 miles (air) west by southwest of Adin, Big Valley. 1264 Comment
  UC1584003  Ranunculus occidentalis G. Schoolcraft 1990-5-15 2050 Lassen about 4 mi s Nubieber; John's Valley 1310 Comment
  CHSC52793  Ranunculus uncinatus Cindy Prouty 1978-7-5 1 Lassen E shore of Mahogany L., S of Eagle L. Found in meadow. 2060 Comment
  CHSC60392  Ranunculus uncinatus var. uncinatus Mary Ann Showers 1992-6-13 2539 Lassen Lassen Volcanic National Park. Meadow along trail from Snag Lake jct to Widow Lake. 1828 Comment
  PASA2371  Rhus ovata M. Stason 1931-3-21 Lassen Near Roscoe Comment
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Dec 17 2014
  CHSC6263  Ribes cereum W. Vinyard 1946-6-17 Lassen Eagle Lake. Mt. Fredonyer summit. 2421 Comment
  JEPS49429 Image available Ribes cereum W. L. Jepson 1910-6-11 4118 Lassen base Cinder Cone 1889 Comment
  UC465786  Ribes cereum Franklin P. Nutting 1894-7-5 Lassen Dixie Valley Comment
  CAS-BOT-BC212656  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 mile E of Fredonyer Pass Comment
  CHSC6264  Ribes roezlii L. Harman 1946-6-23 Lassen Eagle Lake. Roop mountain. 2133 Comment
  JEPS28697  Ribes roezlii George W. Gillett 1957-7-26 917 Lassen e shore Butte Lake; Lassen Volcanic National Park 1844 Comment
  CAS-BOT-BC186151  Ribes roezlii var. roezlii Brighton C. Cain 1925-8-24 96 Lassen Mt. Lassen Volcanic National Park 1 mi. below Drakesbad 1645 Comment
  UCR248242  Ribes velutinum J. R. Keck Jr. 1977-8-10 s.n. Lassen Lassen National Forest, near Puls Camp east of Blacks Mountain 1829 Comment
  SEINET10482959  Ribes velutinum Mary Susan Taylor 1974-1 Taylor 288 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. 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
  RSA0023959  Ribes viscosissimum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  SEINET2054605 Image available Rigiopappus leptocladus Arnold Tiehm, Margaret Williams, Jan Nachlinger 1988-6-2 11700 Lassen South side of Shaffer Mt., 3.4 road miles North of the Wendel road on highway 395 from Susanville to Alturas, west of highway. 1386 Comment
  CAS-BOT-BC74533  Rorippa curvisiliqua Al Simontacchi 1940-6-4 806 Lassen Lassen Forest. 14.8 miles west of Harvey Mountain Lookout. 1783 Comment
  CHSC84873  Rorippa curvisiliqua Samantha Mackey Hillaire; Linnea Hanson, Catie Bishop 2003-9-21 354 Lassen Lassen Volcanic National Park. Snag Lake; mudflat just N of an open stand of willows on the south shore of the lake; just east of where Grassy Creek flows into the lake. [Label says 'area near' latitude and longitude]. 1900 Comment
  CHSC113059  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2013-7-22 18855 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
  CHSC71385  Rorippa curvisiliqua var. orientalis V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9260 Lassen Moll Reservoir in Ash Valley southeast of Adin. Along the edge of the reservoir. 1615 Comment
  CHSC4261  Rorippa nasturtium-aquaticum K. R. Stern 1967-6-24 2405 Lassen Murrer Meadow, ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  CHSC75481  Rorippa sinuata Vernon H. Oswald; Lowell Ahart 1999-6-9 9735 Lassen Hwy. 395 northeast of Susanville and north of Smoke Creek Ranch Rd. at Mud Flat. On the bank between the highway and the playa. 1348 Comment
  CAS-BOT-BC148360  Rubus leucodermis George W. Gillett 1957-7-26 914 Lassen Butte Lake - Lassen Volcanic National Park 1844 Comment
  HSC19712  Rubus parviflorus M. S. Baker 1890-1 Lassen Milford Comment
  HSC95219  Rumex crispus Gordon Leppig 1998-7-12 962 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC66865  Rumex fueginus Vernon H. Oswald; Lowell Ahart 1996-9-10 8283 Lassen Mountain Meadows Reservoir SW of Westwood. Uncommon on the embankment of the railroad along the northwest edge of the reservoir. 1539 Comment
  CHSC66730  Rumex occidentalis Vernon H. Oswald; Lowell Ahart 1996-8-1 8117 Lassen N shore of the Hamilton Branch of the N. Fork of the Feather River ca. 0.1 mi downstream from Indian Ole Dam on Mountain Meadows Reservoir, SW of Westwood. 1524 Comment
  JEPS97683  Rumex salicifolius var. lacustris Annetta M. Carter 1946-8-18 1776 Lassen S end of Grasshopper Valley, N of Eagle Lake. 1615 Comment
  UC1136137  Rumex salicifolius var. lacustris E. Sawyer 1935-6-27 228 Lassen Long Valley Sierraville Quad. 1310 Comment
  RSA0105590  Rumex stenophyllus Lowell Ahart, John Dittes 2013-7-22 18866 Lassen North margin of road levee, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS119645  Rumex triangulivalvis Lowell Ahart, John Dittes 2012-7-9 18302 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  HSC29859  Rumex venosus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19300 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  POM203794  Rumex venosus J. T. Howell 1934-7-8 12486 Lassen Spaldings Resort; Eagle Lake Comment
  UCD101656  Rumex venosus R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  SEINET4176394  Rumex venosus P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CHSC27591  Sagittaria cuneata J. D. Prouty 1978-7-23 24 Lassen Upper Murrers Meadow, SE of Eagle L. 1545 Comment
  HSC95346  Salix eastwoodiae Gordon Leppig, J. Cromwell 1997-7-27 608 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  NY188399  Salix eriocephala subsp. mackenzieana R. D. Dorn 1972-6-2 1492 Lassen Willow Creek, about 15 miles SSE of Adin 1524.0 Comment
  CAS-BOT-BC108055  Salix exigua John Thomas Howell 1975-7-23 51403 Lassen Wet ground along Hwy. 395 between Johnstonville and Jonesville - Sierra Nevada 1280 Comment
  CAS-BOT-BC128170  Salix lasiandra var. lasiandra John Thomas Howell; Gordon H. True 1973-8-1 50149 Lassen Transition Zone forest in areas of granitic rock, Gold Run Creek road south of Susanville, Diamond Range - Sierra Nevada 1584 Comment
  NY430478  Salix lasiolepis G. Schoolcraft 1998-5-22 2719 Lassen Susan River east end of Susanville 1268.0 Comment
  CAS-BOT-BC124634  Salix lemmonii John Thomas Howell 1976-7-20 52016 Lassen along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  JEPS96090  Salix scouleriana Vernon H. Oswald and Lowell Ahart 1996-6-17 7770 Lassen on n side of Hwy 36 ca 0.2 mi e & mile post (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1432 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
  UC104453  Salvia aethiopis T. Brandegee 1892-6-30 Lassen streets of Susanville Comment
  CAS-BOT-BC214313  Salvia dorrii var. pilosa Ella Dales Cantelow 1941-5-22 3656 Lassen 2 1/2 mi. n. of Secret Valley C.C.C. Camp, Hy. 395, Quincy to Alturas Comment
  SEINET8018246  Salvia dorrii var. pilosa J. A. Young 1982-6-7 s.n. Lassen NE Lassen County, Redlands. 1676 Comment
  UCD137207  Sambucus nigra subsp. caerulea P. B. Schultz 1967-7-12 78 Lassen 14 miles southeast of Adin on State Highway 139. 1524 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
  POM161480  Sanicula tuberosa Franklin P. Nutting 1894-7-9 s.n. Lassen Pine Creek Comment
  UC1441325  Sanicula tuberosa David H. French 1968-6-2 2880 Lassen about 5 mi e of Westwood (near State Hwy 36) Comment
  SEINET10579543  Sanicula tuberosa Katherine L. Morris, David B. Dunn; Melvin L. Conrad 1973-5-25 Morris 242 Lassen Collected 7.6 mi. NW of Jct. of Hwy 36 & 44 on Hwy 44. Comment
  CAS-BOT-BC110336  Sarcobatus vermiculatus Louella Bass 1982-6-20 s.n. Lassen West of Karlo. Comment
  CAS-BOT-BC110337  Sarcobatus vermiculatus John Thomas Howell 1934-6-10 11897 Lassen Horse Lake. Comment
  UC1121106  Sarcodes sanguinea A. Simontacchi 1940-6-17 883 Lassen 1.4 miles S of Patterson Mtn. 1821 Comment
  UC70391  Sarcodes sanguinea Milo S. Baker 1890-4 Lassen Honey Lake Valley Comment
  JEPS96023  Saxifraga oregana Vernon H. Oswald and Lowell Ahart 1996-6-24 7889 Lassen 0.5 mi e of Eagle Lake Road ((A1) and 2.5 mi s of Eagle Lake, Papoose Meadows, Modoc Plateau, Montane Meadow); Papoose Meadows, Modoc Plateau, Montane Meadow 1633 Comment
  CAS-BOT-BC283611  Schedonorus pratensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49466 Lassen Elysian Valley, W of Janesville 1325 Comment
  UC1567432  Schoenoplectus acutus var. occidentalis G. Schoolcraft 1989-7-31 1998 Lassen along A27 about 8 mi e Susanville; e of Susanville 1243 Comment
  CHSC99154  Scirpus acutus var. occidentalis Lowell Ahart; John Dittes 2008-6-22 15018 Lassen On the east end of the levee, about 100 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber. 1260 Comment
  JEPS78082  Scirpus acutus var. occidentalis Gary W. Zamzow 1972-7-18 88 Lassen beside Highway 395 16.8 mi s of the intersection with Highway 36; beside Highway 395 1280 Comment
  UC2120  Scirpus fluviatilis J. Burtt Davy Jun 17 1897-Jun 24 1897 3285 Lassen w end Honey Lake; Honey Lake Valley, w end Honey 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
  JEPS95894  Scirpus nevadensis Lowell Ahart 1999-9-13 8228 Lassen on the south side of Mapes Road; about 200 yards east of Lambert Lane; about 3 1/2 miles (air) southeast of Standish 1210 Comment
  CHSC7755  Scrophularia californica Beverley J. Wise 1969-5-18 110 Lassen 18.2 mi. N. E. of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. North sidewall of Willow Creek Canyon. 1463 Comment
  SEINET13751284  Scrophularia desertorum N. H. Holmgren, P. K. Holmgren 1978-6-11 8922 Lassen Painters Flat road, 28.3 km (17.6 miles) east of Ravendale and 23.5 km (14.5 miles) airline distance. 1740 Comment
  UC1523769  Scutellaria antirrhinoides Gary Schoolcraft 1981-6-9 449 Lassen ne of McArthur 1280 Comment
  UC1137775  Scutellaria nana August L. Hormay 1934-7-2 Lassen 1/4 mi nw of Black's Mountain; Lassen National Forest 1706 Comment
  UC1549236  Scutellaria nana Richard Olmstead 1984-6-27 581 Lassen turnoff 14 mi s of Ravendale (10.3 mi e of US 395); Rye Patch Canyon Road 1603 Comment
  UC773951  Scutellaria nana L. R. Short, J. Warren 1936-6-23 S 445 Lassen Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1809 Comment
  CAS-BOT-BC240086  Secale cereale David D. Keck; J. Clausen 1935-6-24 3750 Lassen 2 mi. S. of Ravendale 1464 Comment
  CAS-BOT-BC240087  Secale cereale David D. Keck; J. Clausen 1935-6-24 3750 Lassen 2 mi. S. of Ravendale 1464 Comment
  NY758141  Sedum lanceolatum J. T. Howell 1974-7-30 50670 Lassen Summit ridge of Diamond Mountain 2286 Comment
  UC831880  Senecio aronicoides A. A. Heller 1938-6-4 15143 Lassen w of Fredonyer Pass (on Highway 36) 1676 Comment
  CDA34518  Senecio aronicoides B. Villegas 2011-5-26 s.n. Lassen Susanville, 2.3 miles southwest from junction of Hwy 36 & Hwy 139. 0 Comment
  CHSC96754  Senecio hydrophilus Gordon Leppig 1998-8-17 1057 Lassen Modoc National Forest. 1970 Comment
  SBBG8784  Senecio hydrophilus H. and M. Dearing 1938-7-1 2241 Lassen 12 mi W of Susanville Comment
  CAS-BOT-BC363856  Senecio integerrimus var. exaltatus Doris Kildale Gillespie 1930-5-13 9388 Lassen Between Susanville and Janesville Comment
  OBI76934  Senecio integerrimus var. exaltatus Anthony Baniaga 2011-6-11 336 Lassen Lassen Natl forest. Along 105, W of Champs Flat. Champs Flat quad T33N R9E sec 27 NW of SW 1686 Comment
  UC1137573  Senecio integerrimus var. exaltatus A. Simontacchi 1940-7-10 922 Lassen 4.6 mi sw Schoonamaker Lake; Lassen National Forest, Halls Flats Quad. 1889 Comment
  UC1608996  Senecio integerrimus var. exaltatus Vernon H. Oswald and Lowell Ahart 1993-6-3 5480 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y) where it diverges from Lassen 21 (32N02) to Eagle Lake (s side of valley, between Poison Lake and Susanville); Pine Creek Valley 1725 Comment
  UC1924243  Senecio integerrimus var. exaltatus Debra Valov 2004-6-8 2004241 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CAS-BOT-BC363857  Senecio integerrimus var. exaltatus Elmer I. Applegate 1934-5-4 8937 Lassen 15 miles south of Ravendale Comment
  JEPS79212  Senecio serra var. serra L. R. Heckard with R. C. Bacigalupi 1980-6-12 5253 Lassen about 4.5 mi e Westwood Junction (along Highway 36) 1615 Comment
  RSA518886  Senecio triangularis Barbara Ertter 1988-7-25 7870 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2256 Comment
  CAS-BOT-BC213324  Sidalcea G. D. Hanna 1958-9-22 s.n. Lassen Road from Caribou Lake to Cone Lake Comment
  UC1143016  Sidalcea glaucescens August L. Hormay 1934-7-2 Lassen 1/4 mi nw Black's Mtn; Lassen National Forest, nw of Black's Mtn 1706 Comment
  SBBG4714  Sidalcea oregana H. and M. Dearing 1939-6-6 3569 Lassen Bieber Comment
  UC506975  Sidalcea oregana subsp. oregana George A. Fischer, Irwin H. Johnson 1933-7-12 F- 227 Lassen Lassen Forest , Patterson Flat 1737 Comment
  POM84772  Sidalcea oregana subsp. spicata Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  NY177476  Sidalcea oregana var. spicata J. T. Howell 1934-7-6 12442 Lassen Harvey Valley Comment
  JEPS28444  Silene bernardina George W. Gillett 1957-8-28 928 Lassen on trail to Widow Lake above junction with Snag Lake Trail (upper end of butte Lake Lassen Volcanic National Park); Lassen Volcanic National Park, upper end Butte Lake 1859 Comment
  CHSC57274  Silene bridgesii Mary Meyer 1980-7-24 Lassen West of rocky outcrop at sharp bend in the Lookout Road. 2255 Comment
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Aug 11 2014
  CAS-BOT-BC136279  Silene douglasii A. G. Brennels 1928-7-3 7 Lassen Lassen Forest, Jesson Valley 1463 Comment
  POM100924  Silene lemmonii Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 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
  CAS-BOT-BC389545  Silene nuda M. S. Taylor; B. Hammond 1982-7-8 4790 Lassen Along Scott Rd just s of bend, ca. 4 mi ne of Beckwourth Pass 1432 Comment
  JEPS87996  Silene nuda Barbara Ertter 1988-7-25 7867 Lassen ca 1.5 mi e Diamond Peak (ca 10 airmi due s of Susanville, ridge of Diamond Mts.); ridge of Diamond Mts., e of Diamond Peak 2255 Comment
  RSA123274  Silene nuda E. Sawyer 1935-6-27 223 Lassen Long Valley. 1311 Comment
  UC717968  Silene nuda David D. Keck 1944-7-8 5446 Lassen 2 mi e Westwood (in grassy meadow leading to Mountain Meadows Reservoir); Sierra Nevada, mdw leading to Mountain Meadows Reservoir 1524 Comment
  CAS-BOT-BC389544  Silene nuda Paul F. Covel 1937-7-19 755 Lassen Westwood Airport Comment
  CAS-BOT-BC74890  Sinapis alba John Thomas Howell 1974-7-8 50502 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC75079  Sisymbrium altissimum Louella Bass 1973-5-25 46 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  JEPS107467  Sisymbrium altissimum Lowell Ahart, John Dittes 2005-6-1 11850 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
  NY189188  Sisymbrium altissimum B. Anderson 1986-7-9 3123 Lassen Road to Day, about 2.4 km N of Rte. 299. 1065 Comment
  RSA0045631  Sisymbrium orientale Lowell A. Ahart, John Dittes 2008-6-20 14900 Lassen 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
  CHSC66274  Sisyrinchium bellum Vernon H. Oswald; Lowell Ahart 1996-6-24 7875 .1 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Bordering Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  JEPS114987  Sisyrinchium bellum Lowell Ahart, John Dittes 2008-6-20 14964 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
  UCD138789  Sisyrinchium bellum Gerald Dickinson 1963-7-2 71 Lassen east of Willow Creek campground, south of Hayden Hill, State Highway 139. 1219 Comment
  UC21381  Sium suave J. Burtt Davy Jun 17 1897-Jun 24 1897 3363 Lassen Honey Lake Valley Comment
  CHSC4987  Solanum triflorum R. Clicquennoi 1967-7-1 56 Lassen 2 mi w of Murrer's Ranch turnoff, 14.9 mi w of Murrer's Ranch turnoff [sic], 14.9 mi from Susanville, highway 139. 1463 Comment
  NY820340  Solanum triflorum J. T. Howell 1973-7-10 49797 Lassen Susanville, in city park 1295 Comment
  JEPS124384  Sonchus asper subsp. asper Lowell Ahart, John Dittes 2015-7-13 20304 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  HSC95310  Sparganium emersum Gordon Leppig, Juli Neander, Kai Neander 1997-7-26 691 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  NY482319  Spergularia diandra G. Schoolcraft 1998-6-8 2734 Lassen N. base of Ft. Sage Mtns. 1249.7 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
  UCD150406  Sphaeromeria potentilloides William Anderson 1963-6-9 s.n. Lassen Vinton. Comment
  HSC95184  Spiranthes porrifolia Gordon Leppig 1998-8-17 1038 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95268  Spiranthes romanzoffiana Gordon Leppig, J. Cromwell 1997-7-26 601 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC5276  Stachys ajugoides var. rigida L. Harman 1946-6-26 Lassen Pine Creek, Eagle Lake. 1584 Comment
  JEPS128405  Stachys rigida Catherine Bauer with Ellen Bauer Benson 2017-8-16 12 Lassen South of Highway 44, North of Butte Lake, between Butte Creek and access road into Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  CAS-BOT-BC60993  Stanleya viridiflora Louella Bass 1982-7-25 10 -82 Lassen Near Karlo, about 12 miles north of Litchfield. 1356 Comment
  CHSC75482  Stanleya viridiflora Vernon H. Oswald; Lowell Ahart 1999-6-9 9744 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. 1353 Comment
  SEINET11604939  Stanleya viridiflora L. Bass 1982-7-25 10 -82 Lassen Near Karlo, ca 12 miles N of Litchfield. 1356 Comment
  SEINET10965514  Stellaria longipes Mary Susan Taylor 1982-6-12 Taylor 4660 Lassen T25N R17E se sec 8. Doyle quad. In sandy Sagebrush Scrub, in Doyle, ca. 1/2 mi e of Hwy 395. Comment
  SEINET11933235  Stellaria longipes J. D. Prouty 1978-1 29 Lassen S of Eagle L., along Papoose Creek, ca 1 mi from Gallatin Rd., T31N, R11E, Sec. 17 1591 Comment
  JEPS94472  Stenotus acaulis Vernon H. Oswald and Lowell Ahart 1997-5-27 8507 Lassen 0.3 mi e of Highway 139 (n of Susanville on Forest Route 38N04 between Hwy 139 near Willow Creek Guard Station and Coyote Flat, betw road and creek paralleling rd to north); Forest Route 38N04 1560 Comment
  CHSC77201  Stenotus lanuginosus G. Schoolcraft 1993-6-10 2294 Lassen Along Clark's Valley Rd. s. of Red Rock Lake. 1828 Comment
  JEPS89748  Stenotus lanuginosus var. lanuginosus Dean Wm. Taylor with Glenn L. Clifton 1992-5-7 12545 Lassen ca. 0.4 mi. from Hwy. 139 on rd. to Smith Flat (Willow Creek drainage); Modoc Plateau, Land Reservoir 7 1/2 Quad. 1990 ed., Willow C 1524 Comment
  JEPS36876  Stephanomeria lactucina Brown and Wieslander 1922-7-19 40 Lassen Martin Springs Eagle Lake Comment
  SEINET11262513  Stephanomeria lactucina Robert L. Johnson, Mikel R. Stevens 2015-7-10 3939 Lassen Southern Cascade Range. North side of Westwood 0.3 rd mi west of jct with Mooney Rd on CA-36. N side of rd.; 0 1563 Comment
  CAS-BOT-BC375596  Stephanomeria lactucina Alice Eastwood 1912-8-22 s.n. Lassen Trail from Morgans Springs to Lassen Butte Region Comment
  CDA8868  Stephanomeria spinosa E. E. Fix 1946-7-21 Lassen Susanville. 0 Comment
  JEPS36870  Stephanomeria tenuifolia Brown and Wieslander 1922-7-23 35 Lassen Martin Springs Eagle Lake Comment
  HSC24234  Stipa comata John Pratt 1970-6-27 49 Lassen .5 mi. E of Turtle Head Comment
  CHSC118490  Stipa comata var. comata Don Lepley 2015-6-16 Lassen Lassen National Forest. Eagle Lake Ranger District. About 140 yards souteast of central entrance to Sandy Beach cinder pits and 1.9 air miles north-northwest of Spalding marina. UTM 687661 x 4506890. 1563 Comment
  HSC22876  Stipa hymenoides John Pratt 1970-6-14 15 Lassen East of Janesville Comment
  JEPS122358  Stipa lemmonii var. lemmonii Joseph Broberg, Jaycee Leonard 2012-6-28 CA 320 -104 Lassen From Alturas, head west on 299. 2 miles after Nubieber turn left at American flag and signs for Sierra Pacific Industries. Muck Valley Allotment. Collection site is at end of spur road Comment
  SEINET10443621  Stipa thurberiana M. Church 2016-6-21 5 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1507 Comment
  UCR119160  Stipa thurberiana Beecher Crampton 1964-6-27 7095 Lassen Modoc Plateau, 5 miles southwest of Ravendale. 1707 Comment
  POM95030  Streptanthus cordatus Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.?] 1220 Comment
  UC7242  Suaeda calceoliformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3350 Lassen Honey Lake Valley Comment
  CHSC64784  Suaeda moquinii Vernon H. Oswald 1995-6-7 6835 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) near milepost 10.5, 4.9 mi e of Wendel, ne of Susanville. Flat near the railroad. 1231 Comment
  CHSC60831  Swertia albicaulis var. albicaulis Vernon H. Oswald; Lowell Ahart 1993-6-28 5605 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  CHSC29889  Swertia albicaulis var. nitida Robin Ondricek 1978-6-6 34 Lassen Along road to ELFS 1.2 mi from intersection with Hwy 139. 1499 Comment
  JEPS123497  Symphoricarpos longiflorus Wilson Collison, Jaileen Merced 2015-8-8 CA 320 -143 Lassen To Highway 139 W (North) from Termo - Grasshopper Road continue 4.5 mi (1 mile after entering forest). Turn right on to Grand Road (37N29). Continue uphill (East), right at 1st fork, straight at 2nd. Comment
  CHSC79146  Symphoricarpos rotundifolius var. rotundifolius L. P. Janeway 2000-6-24 6839 Lassen Northern High Sierra Nevada. Volcanic promontory on south edge of the top of Crystal Peak. 2371 Comment
  CHSC76081  Symphyotrichum ascendens Lowell Ahart; Vernon H. Oswald 1999-9-13 8230 Lassen Along the south side of the dirt road, Willow Creek is on the south side of the road, about 250 yards east of the sign-in station along Highway 139, Willow Creek Wildlife Area. 1463 Comment
  UC762731  Symphyotrichum ascendens R. F. Hoover 1940-10-1 4654 Lassen Janesville Comment
  UC773956  Symphyotrichum ascendens L. R. Short 1936-8-24 S- 498 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1792 Comment
  JEPS95906  Symphyotrichum ascendens Lowell Ahart and Vernon H. Oswald 1999-9-13 8230 Lassen along S side of dirt road, Willow Creek is on the S side of the road, about 250 yds. E of the sign in station along Hwy 139, Willow Creek Wildlife Area 1463 Comment
  OBI72112  Symphyotrichum ascendens Barbara Ertter 1987-7-24 7299 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved rd. T22N R17E sec 5 NENE 1524 Comment
  CHSC118847  Symphyotrichum bracteolatum L. P. Janeway 2015-8-10 11830 Lassen Warner Mountains. Steep west-facing slope above the 64 Road (39N01 - the road to Patterson Campground), 0.2 km north-northeast of crossing of East Creek; between Peterson Meadow and Long Valley. 2047 Comment
  CHSC59130  Symphyotrichum frondosum Vernon H. Oswald 1992-7-3 5054 Lassen Lassen Volcanic National Park. Alluvial fan of Grassy Creek at the S end of Snag Lake. 1851