Search Results — 2000 specimen records retrieved (1594 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
  CAS-BOT-BC78035  Abies concolor Clare B. Hardham 1969-8-28 s.n. Lassen west of Janesville Comment
  CDA23835  Abronia turbinata S. E. Piper 1943-7-2 Lassen 0.5 mile east of Herlong. 0 Comment
  CAS-BOT-BC330610  Acer glabrum var. glabrum Clare B. Hardham 1969-8-28 17438 Lassen Sierra Nevada. West of Janesville. Comment
  RSA394187  Acer macrophyllum Christopher Davidson 1975-6-6 2726 Lassen Road to Thompson Peak, branching east of road 204, 7.5 miles SW of Susanville, following Gold Run Creek 0.5 mile on this road to the peak 1494 Comment
  CDA18380  Acer negundo G. D. Barbe 1978-7-11 2400 Lassen Madeline Plains; Madeline Plains, West Side Rd. W of Termo. 1615 Comment
  CHSC12419  Achillea millefolium Anne Linda Brisk 1969-6-20 9 Lassen Growing in Dean's Meadow. 1950 Comment
  CHSC12493  Achillea millefolium Carol Weld 1969-6-20 20 Lassen Dean's Meadow. 1950 Comment
  CHSC6285  Achillea millefolium R. Clicquennoi 1967-7-1 14 Lassen 16 mi n of Susanville, Calif. Highway 139. 1645 Comment
  UC506997  Achillea millefolium George A. Fisher and Irwin H. Johnson 1933-7-12 F 207 Lassen Grass Valley; Lassen Natl. Forest Comment
  CAS-BOT-BC260405  Achnatherum hymenoides P. B. Kennedy 1901-6-10 s.n. Lassen Railroad Station, Constantia Comment
  UC1609124  Achnatherum hymenoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5544 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)); Eagle Lake 1566 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
  JEPS456  Achnatherum occidentale subsp. californicum G. S. Crew and C. S. Robinson 1927-6-25 29 Lassen near Westwood <Tet?>; Lassen Forest 1706 Comment
  UC1024688  Achnatherum occidentale subsp. occidentale Leo Whitney 1933-7-15 2157 Lassen 16 mi w of upper end of Eagle Lake; Lassen National Forest, Harvey Montain Comment
  JEPS102671  Achnatherum speciosum V. H. Oswald, B. Corbin, K. Earll, and G. Schoolcraft 2001-6-2 10034 Lassen NE of Doyle (Fort Sage Mountains, trailhead to top of mountain from the end of a 4WD road) 1798 Comment
  UC584327  Achnatherum thurberianum G. L. Stebbins Jr. and J. A. Jenkins 1937-7-15 2355 Lassen along highway from McArthur to Bieber; Big Valley Mt. 1100 Comment
  UC593456  Achnatherum thurberianum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1744 Lassen gully on mountain above Red Rock 1420 Comment
  CAS-BOT-BC217994  Achnatherum webberi John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50679 Lassen Summit ridge of Diamond Mountain 2346 Comment
  UCD32671  Achnatherum webberi Beecher Crampton 1954-7-6 2074 Lassen Lassen County, 15 miles south of Ravendale, along US highway 395. 1676 Comment
  CHSC27639  Acmispon americanus var. americanus George Deniso 1978-7-16 77 Lassen Streamside along Hwy 36, several mi E of Fredonyer Pass. Comment
  CHSC29909  Acmispon americanus var. americanus Robin L. Ondricek 1978-7-15 99 Lassen East side of Lower Dry Lake. 1645 Comment
  CHSC29950  Acmispon americanus var. americanus Robin L. Ondricek 1978-6-8 51 Lassen Murrers Upper Meadow, .6 mi E of inersection with main rd. to ELFS. 1554 Comment
  CHSC5075  Acmispon americanus var. americanus D. L. Stites 1967-7-8 121 Lassen Ca. 18 mi n of Susanville. 1371 Comment
  CAS-BOT-BC412874  Aconogonon davisiae G. Schoolcraft 1997-8-6 2664 Lassen N of Dimond [Diamond] Rock Peak 2316 Comment
  CDA6765  Acroptilon repens T. C. Fuller 1962-8-29 9486 Lassen Road to Adin, 1 miles east of Lookout, Big Valley. 0 Comment
Read comments
Jun 24 2009
  JEPS31589  Adonis aestivalis J. R. Sweeney 1962-7-5 2653 Lassen 1/2 mi n of Willow Creek Guard Station (16 mi n of Susanville, Modoc National Forest, on State Highway 139, 54 mi s of Adin); Modoc National Forest, State Highway 139 1219 Comment
  CAS-BOT-BC110715  Aegilops cylindrica John Thomas Howell 1974-7-8 50505 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC383114  Agastache parvifolia Andrew Townesmith; Karen M. Meyer 2007-7-22 847 Lassen Lassen National Forest, Eagle Lake Ranger District. Intersection of Forest Service road 32N09 and Forest Service route 10, 6 miles SW of state route 44 1971 Comment
  CHSC12937  Agastache parvifolia J. Pitts 1972-6-23 263 Lassen Exit of Bly Tunnel, Upper Murrer Meadow. Comment
  CHSC57190  Agastache parvifolia Mary Meyer 1980-7-1 Lassen In lava flow on side of road running west at the south end of McCoy Flat. 1645 Comment
  HSC86888  Agastache parvifolia R. Carter 1967-7-3 584 Lassen S side of rd. on way to Eagle Lake Biology Station and Willow Creek 1585 Comment
  POM147886  Agastache urticifolia J. B. Feudge 1927-7-20 1754 Lassen Westwood Comment
  HSC63943  Ageratina occidentalis Teresa Prendusi 1980-7-16 Lassen Willow Creek 1463 Comment
  UC468890  Agoseris X dasycarpa J. Burtt Davy Jun 17 1897-Jun 24 1897 3405 Lassen Chat Long Valley Comment
  SEINET10925084  Agoseris glauca Paul Gallian, David B. Dunn 1971-6-2 Gallian 510 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  RSA715617  Agoseris glauca var. dasycephala L. Ahart, John Dittes 2005-6-1 11851 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
  JEPS107468  Agoseris monticola Lowell Ahart, John Dittes 2005-6-1 11851 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
  UC585114  Agoseris parviflora E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1793 Lassen about 2 mi n Madeline 1363 Comment
  CAS-BOT-BC127583  Agropyron cristatum John Thomas Howell 1974-7-8 50468 Lassen Sierra Nevada. Susanville. 1295 Comment
  CDA1692  Agropyron desertorum G. D. Barbe 1974-8-2 1933 Lassen Hallelujah Junction, US 395 at Hwy 70, northwest corner. Comment
  UCD32657  Agropyron spicatum Beecher Crampton 1954-7-5 2053 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 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
  HSC8791  Agrostis exarata D. E. Anderson 1963-8-25 2803 Lassen 3 mi. E of Cromberg 1372 Comment
Read comments
Apr 25 2013
  POM313172  Agrostis exarata Malcolm A. Nobs, S. Galen Smith 1949-7-21 1057 Lassen Lassen County: Shallow marshy stream from springs, 4 miles N of Madeline Comment
  RSA0105582  Agrostis exarata Lowell Ahart, John Dittes 2013-7-22 18858 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA299261  Agrostis exarata J. T. Howell, Gordon H. True 1973-8-1 50226 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville Comment
  UC53515  Agrostis exarata M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley Comment
  CAS-BOT-BC139298  Agrostis idahoensis John Thomas Howell; Gordon H. True 1973-8-1 50232 Lassen Sierra Nevada. Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville. 2133 Comment
  UC725737  Agrostis idahoensis A. A. Heller 1942-9-7 16534 Lassen edge Echo Lake; edge Echo Lake Comment
  CAS-BOT-BC139293  Agrostis idahoensis George W. Gillett 1957-7-28 927 Lassen Lassen Volcanic National Park. Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake. Dry was 100 yards above trail junction. 1859 Comment
  SEINET7594038 Image available Agrostis idahoensis George W. Gillett 1957-7-22 877 Lassen Lassen Volcanic National Park; Snag Lake. Margin of gravel bars 110 yards above lake near south shore. 1850 Comment
  UC1483834  Agrostis pallens G. Schoolcraft 1980-7-28 330 Lassen rocky meadow area e Tule Mountain (s of Blue Lake) 2042 Comment
  CAS-BOT-BC138802  Agrostis scabra John Thomas Howell 1973-7-10 49768 Lassen Sierra Nevada. Near Westwood. 1554 Comment
  UCD53272  Agrostis scabra L. Whitney 1933-8-4 2228 Lassen Sheepshead, 10 miles northwest of north end of Eagle Lake, Lassen National Forest. 1889 Comment
  UCD149882  Aliciella leptomeria Harry George 1967-6-14 s.n. Lassen Hartson Reservoir. 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
  UC978580  Alisma gramineum Verne Grant and Irving Schneider 1947-8-1 8221 Lassen irrigation ditch running sw into State Fish and Game nesting area on west side of Section 19; Madeline Plain Comment
  JEPS124714 Image available Alisma triviale P. Matteson 1968-7-9 86 Lassen 1.6 mi N of intersection of HWY 139 and Horse Lake Rd. Comment
  UC1299748  Allium acuminatum Freed W. Hoffman 1946-6-9 739 Lassen on Highway 395 about 10 mi s Alturas; Dry Creek Comment
  UC3061  Allium amplectens M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixey Mts. Comment
  SEINET10899656  Allium anceps Billy Joe Cox, David B. Dunn 1971-6-2 Cox 2572 Lassen 3 miles s of hallelujah jct., On u.s. Hwy. 395, Jct. Of u.s. 395 & Calif. 70; Along roadside and in artemesia - grassland field Comment
  CHSC30581  Allium campanulatum Sori H. Shad 1970-7-25 48 Lassen Found on the way to Papoose Valley, about 9 miles south of E. L. B. S. 1653 Comment
  HSC30074  Allium campanulatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19268 Lassen Harvey Valley near Cone Springs Comment
  JEPS26135  Allium lemmonii L. R. Short 1936-6-10 S- 416 Lassen Burgess Spring Experiment Range 1798 Comment
  RSA125593  Allium lemmonii Peter H. Raven, Otto T. Solbrig 1958-6-17 13288 Lassen U. S. Highway 395, 1.8 miles south of Ravendale. Comment
  UC1609487  Allium lemmonii Vernon H. Oswald and Lowell Ahart 1993-6-28 5587 Lassen e. of Poison Lake (Harvey Valley Rd. (33N02), 1.2 mi n. of Hwy. 44, e side of Grays Valley); Grays Valley 1731 Comment
  CAS-BOT-BC470925  Allium lemmonii C. L. Hitchcock 1940-5-26 6640 Lassen Overflow of Pitt River, 1 mile west of Bieber Comment
  CAS-BOT-BC472753  Allium lemmonii Peter H. Raven; Otto T. Solbrig 1958-6-17 13288 Lassen Highway 395, 1.8 miles south of Ravendale Comment
  SEINET3884711  Allium lemmonii D. W. McNeal 1983-6-5 2840 Lassen Beside Eagle Lake Road (Lassen Co. Highway A-1) 0.5 mile North of Highway #36.; 0 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
  RSA59747  Allium platycaule E. K. Balls 1950-5-19 14782 Lassen 16.5 miles west of Madeline on road from Adin. 1677 Comment
  NY526213  Alnus incana subsp. tenuifolia G. Schoolcraft 1982-8-18 887 Lassen Along Doyle Grade Road, west of Doyle 1554.5 Comment
  UCD109973  Alnus incana subsp. tenuifolia John Thomas Howell; J. H. True 1973-6-28 49461 Lassen Elysian Valley, west of Janesville. 1325 Comment
  CHSC65366  Alopecurus aequalis Vernon H. Oswald; Lowell Ahart 1995-8-14 7194 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittant stream, N of Susanville. 1676 Comment
  UCD55846  Alopecurus aequalis L. Whitney 1935-6-23 s.n. Lassen Fruit Grower's Supply Co., Camp #10. 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
  CHSC117529  Alopecurus carolinianus Lowell Ahart; John Dittes 2016-7-13 21142 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
  CAS-BOT-BC138012  Alopecurus geniculatus Peter H. Raven; Otto T. Solbrig 1958-6-17 13299 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline. Comment
  RSA125344  Alopecurus geniculatus P. H. Raven, Otto T. Solbrig 1958-6-17 13299 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline. Comment
  CAS-BOT-BC138009  Alopecurus geniculatus Stuart K. Harris 1960-6-23 21411 Lassen Bed of Poison Lake. 1645 Comment
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  CHSC107996  Alyssum minus subsp. micranthum Lowell Ahart; John Dittes 2011-6-20 17493 Lassen About 20 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
  CHSC27717  Amaranthus blitoides Robert A. Schlising 1978-7-27 3319 Lassen E of Eagle Lake and NE of Eagle L. Field Station. 1578 Comment
  SEINET3391171  Amelanchier alnifolia E. D. McArthur 1982-1 EDM- 1360 Lassen NW of Janesville at Jct of Co Ros 205 & 219 Comment
  HSC18512  Amelanchier alnifolia var. semiintegrifolia H. E. Parks, S. T. Parks 1928-6-16 261 Lassen Lassen National Park, Drakesbad 1677 Comment
  POM253370  Amelanchier pallida A. A. Heller 1938-6-4 15144 Lassen 1 mile east of Fredonyer Pass on hwy 36. 1707 Comment
  RSA38464  Amelanchier pallida Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford. 1524 Comment
  POM91172  Amelanchier pallida Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 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
  SD43502  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  CHSC76307  Amphiscirpus nevadensis Lowell Ahart; Vernon H. Oswald 1999-9-13 8228 Lassen Along a small slough, 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
  CHSC99503  Amsinckia intermedia Lowell Ahart; John Dittes 2008-6-20 14935 Lassen On the levee road, about 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  HSC97154  Amsinckia menziesii L. Ahart, John Dittes 2005-6-1 11899 Lassen N side of Scott Rd., E of the railroad underpass, Long Valley, about 4.75 mi. N of the intersection of Scott Rd. and Hwy. 70, 6.2 mi. NW of Hallelujah Jct. 1460 Comment
  JEPS61105  Amsinckia menziesii var. menziesii W. L. Jepson 1918-8-2 7777 Lassen Beckwith Pass 1463 Comment
  SEINET12492784  Amsinckia tessellata F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  RSA622142  Amsinckia tessellata var. tessellata B. J. Cox, D. B. Dunn 1971-6-2 2574 Lassen 3 mi. S. of Hallelujah Jct., on U.S. Hwy. 395, Jct. of U.S. 395 & Calif. 70. Comment
  JEPS88217  Ancistrocarphus filagineus Vernon H. Oswald and Lowell Ahart 1996-6-17 7797 Lassen s side of Bizz Johnson Trail just e Devils Corral Trailhead (trailhead located off of Hwy 36 ca. 7 mi w of Susanville); Modoc Plateau 1420 Comment
  CAS-BOT-BC15606  Ancistrocarphus filagineus Alice Eastwood; J. T. Howell 1940-6-16 8354 Lassen Constantia Comment
  UC1125575  Antennaria argentea A. Simontacchi 1940-6-23 886 Lassen 3.2 mi sw Schoonamaker Lake; Halls Flat Quad. 1920 Comment
  SEINET6735052 Image available Antennaria corymbosa B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11496 Lassen Blue Door Flat, seven or eight miles east of HWY 295 on county road 510 1774 Comment
  CHSC54170  Antennaria dimorpha Vernon H. Oswald 1991-5-28 4624 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  CHSC91298  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
  OBI77058  Antennaria dimorpha Anthony Baniaga 2011-6-5 305 Lassen Lassen NF. Pine Crk Valley N side. Pine Crk Valley quad. T32N R8E sec 35 SW of SW 1725 Comment
  UC585078  Antennaria dimorpha E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1755 Lassen nw-facing slope of ridge e of Redrock 1600 Comment
  UC773914  Antennaria dimorpha L. R. Short 1936-6-8 S- 386 Lassen Burgess Sp. Exp. Range Thompson Meadow 1743 Comment
  CAS-BOT-BC69141  Antennaria geyeri Clare B. Hardham 1969-8-28 17453 D Lassen West of Janesville Comment
  UC1609103  Antennaria geyeri Vernon H. Oswald and Lowell Ahart 1993-6-28 5584 Lassen Harvey Valley Rd (33N02) 1.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1731 Comment
  CAS-BOT-BC69142  Antennaria geyeri Christopher Davidson 1974-7-24 2487 Lassen jCa. 4 mi W of Janesville on rd to Antelope Valley 2133 Comment
  CDA10077  Antennaria luzuloides L. Ahart, J. Dittes 2005-6-1 11862 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. Comment
  HSC82217  Antennaria luzuloides Thomas W. Nelson, Jane P. Nelson 1980-7-6 6000 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS19756  Antennaria luzuloides Rimo Bacigalupi with S. Galen Smith 1957-6-28 5996 Lassen 3.6 mi n of Madeline 1645 Comment
  JEPS94608  Antennaria luzuloides Vernon H. Oswald and Lowell Ahart 1997-5-27 8506 Lassen on Forest Route 38N04 0.3 mi n Hwy. 139 ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat) n of Susanville, between road and small creek n) 1560 Comment
  POM39269  Antennaria luzuloides Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  UC773953  Antennaria luzuloides L. R. Short and J. Warren 1936-6-23 S- 452 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1741 Comment
  UC1951067  Antennaria luzuloides subsp. aberrans Debra Valov 2009-4-25 2009048 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  UC1037270  Antennaria rosea Leo Whitney 1934-7-10 1768 Lassen near, 14 mi w of Eagle Lake Harvey Spring; Lassen National Forest, Harvey Valley 1737 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
  RSA125375  Anthoxanthum aristatum P. H. Raven, Otto T. Solbrig 1958-6-16 13228 Lassen 4.5 miles east of Westwood on Hwy 36 Comment
  CHSC60838  Aphyllon purpureum Vernon H. Oswald; Lowell Ahart 1993-6-28 5615 Lassen N of Hwy 44 on Rd. 33N06, on the SSE flank of Harvey Mtn., NNE of Burgess Meadow, NE of Poison Lake. In a depression bordering the road. 1798 Comment
  CHSC6221  Apocynum androsaemifolium W. Vinyard 1946-6-17 Lassen Eagle Lake, summit of Mt. Fredonyer. 2349 Comment
  UC1537515  Apocynum cannabinum Gordon H. True Jr. 1937-7-10 782 Lassen Bull Flat, Refuge 1Q 1524 Comment
  SEINET5337698  Aquilegia formosa var. truncata C. G. Gulling 1905-1 1544 Lassen Big Meadows Comment
  SEINET10480742  Arabis drummondii Jeffrey Huber 1971-6-2 Huber 125 Lassen Ca 30 mi n of susanville, on state hwy 139, in basatl. Pinus-artemesia-juniper Association. 1646 Comment
  UC1126589  Arabis glabra A. Simontacchi 1940-7-3 916 Lassen 2.6 mi n Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1935 Comment
  UC10185  Arabis holboellii var. retrofracta M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  NY114397  Arabis microphylla var. microphylla Anonymous 1987-6-16 1748 Lassen Skedaddle Mountains 1828.8 Comment
Read comments
Apr 20 2012
  JEPS53113  Arabis puberula M. S. Baker and F. P. Nutting 1894-7-2 Lassen s. side Dixey Mts. 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
  SEINET1916077  Arceuthobium abietinum R. L. Mathiasen 2010-1 1061 Lassen 0.3 km W of Fredonyer Pass on Rte. 36; On Abies Iowiana 1660 Comment
  CAS-BOT-BC45893  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  CAS-BOT-BC45909  Arctostaphylos nevadensis Marcus E. Jones 1897-7-7 s.n Lassen Lassen's Peak 1828 Comment
  CAS-BOT-BC45911  Arctostaphylos nevadensis Jeanne Janish; Carl Janish 1938-9-4 s.n Lassen Above upper Twin Lake, Lassen National Park 2042 Comment
  CHSC5245  Arctostaphylos nevadensis M. West 1946-7-12 Lassen Eagle Lake. Silver Lake. 1981 Comment
  UC21853  Arctostaphylos nevadensis M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  CHSC72309  Arenaria aculeata L. P. Janeway; Glenn Clifton 1998-7-9 5738 Lassen About 4.8 mi south of Doyle; east scarp of Diamond Mountains overlooking Omira; along Road 24N01X 0.8 mi from Constantia Road. 1417 Comment
  CDA23999  Arenaria congesta var. crassula T. C. Fuller 1963-6-11 10661 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  SEINET530728  Arenaria congesta var. lithophila Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  CHSC6196  Argemone munita subsp. rotundata M. West 1946-6-14 Lassen Antelope Grade. 1615 Comment
  CAS-BOT-BC401791  Argemone munita subsp. rotundata Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16352 Lassen 4.5 mi. E. of Susanville Comment
  UC71725  Argemone rotundata Mrs. M. H. Manning 1902-9-1 1 Lassen Reno Nevada to Amadee California Amadee Comment
  UC1136826  Arnica chamissonis George A. Fischer and Irwin H. Johnson 1933-7-12 F 184 Lassen (Dry Lake) Grass Valley Grass Valley, Thompson Meadow 1694 Comment
  CAS-BOT-BC82114  Arnica chamissonis H. M. Hall; E. B. Babcock 1903-6-24 4270 Lassen Near Great Spring, on Hat Creek 1402 Comment
  SBBG128899  Arnica chamissonis L. Ahart,J. Dittes 2008-6-20 14902 Lassen ca. 150 yards SW of where the levee rd crosses Big Valley Canal, in Big Valley, ca. 4 mi (air) NE of the Headquarters at Ash Crk State Wildlife Area, ca. 7 mi (air) NE of Bieber 1263 Comment
  UC2027326  Arnica cordifolia Anthony Baniaga 2011-6-29 401 Lassen Lassen National Forest. Willard Creek. Fredonyer Pass. Fredonyer Pass quadrangle Comment
  CHSC108027  Arnica cordifolia var. cordifolia Lowell Ahart; John Dittes 2011-6-20 17484 Lassen Forest floor, about 50 yards east of the stream, about 100 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC485811  Arnica dealbata H. E. and S. T. Parks June 1928 236 Lassen Drakesbad Lassen National Park Comment
  CHSC66714  Arnica discoidea Vernon H. Oswald; Lowell Ahart 1996-8-1 8128 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. 1737 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
  UC1567375  Arnica fulgens G. Schoolcraft 1989-7-18 1977 Lassen 1 mi w, (s of Clark Valley Rd, at Buck's Spring_ Clark's Valley; Buck's Spring) 1859 Comment
  RSA455868  Arnica longifolia Rockwell 1925-7-1 s.n. Lassen Eagle Lake 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
  UC29582  Arnica sororia M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Mts. Comment
  UCD129181  Artemisia arbuscula A. A. Beetle 1957-8-16 12802 Lassen between Susanville and Johnstonville. Comment
  UCD129188  Artemisia arbuscula F. C. Raney 1966-6-25 s. n. Lassen Harvey Valley, Lassen National Forest. 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
  RSA78904  Artemisia arbuscula subsp. arbuscula E. K. Balls, Percy C. Everett 1952-10-10 18145 Lassen 6.7 mi. SE of Ravendale, Hwy 395, between Susanville and Alturas 1280 Comment
  UC1137582  Artemisia arbuscula subsp. arbuscula A. Simontacchi 1940-9-16 947 Lassen 1.3 mi ne of Ebey Lake; Lassen National Forest, Halls Flat Quadrangle 1691 Comment
  UC773844  Artemisia arbuscula subsp. arbuscula L. R. Short 1936-9-30 S- 506 Lassen Burgess Spring Experimental Range Lassen National Forest, Burgess Spring Experimental Range 1746 Comment
  UCD129263  Artemisia biennis Malcolm A. Nobs; Galen Smith 1949-8-20 1482 Lassen Long Creek, 1 mile north of Doyle, Honey Lake Valley. Comment
  CAS-BOT-BC90328  Artemisia douglasiana Ynez Whilton Winblad 1935-9-28 s.n. Lassen Horse Lake Comment
  JEPS124638 Image available Artemisia lindleyana Laurie Hooker 1965-7-13 119 Lassen On highway 299 west under 2nd bridge of Pit river overflow. Comment
  CAS-BOT-BC93741  Artemisia ludoviciana subsp. incompta Clare B. Hardham 1969-8-28 17463 Lassen Sierra Nevada - slope west of Janesville Comment
  CHSC111259  Artemisia ludoviciana subsp. ludoviciana L. P. Janeway; B. Castro 2012-7-2 10934 Lassen Modoc Plateau. Along Skedaddle Ranch Road 6.4 road km north of Skedaddle Creek at an unnamed tributary of Bull Creek. 1533 Comment
  CHSC117459  Artemisia ludoviciana subsp. ludoviciana Lowell Ahart; John Dittes 2016-7-13 21105 Lassen Center 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
  CHSC65291  Artemisia ludoviciana subsp. ludoviciana Vernon H. Oswald; Lowell Ahart 1995-8-14 7196 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittent stream, N of Susanville. 1676 Comment
  RSA523927  Artemisia ludoviciana subsp. ludoviciana G. H. True 1937-7-10 783 Lassen Bull Flat, Refuge 1Q 1524 Comment
  RSA748314  Artemisia ludoviciana subsp. ludoviciana K. M. Meyer, A. Townesmith 2007-7-19 134 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  UC1776685  Artemisia ludoviciana subsp. ludoviciana G. Schoolcraft 1999-8-11 2878 Lassen East edge of Madeline Plains E of Ravendale, CA 1627 Comment
  CDA10168  Artemisia ludoviciana subsp. ludoviciana T. C. Fuller, E. E. Fix 1959-6-2 2658 Lassen Madelaine area. 0 Comment
  SEINET7153235 Image available Artemisia ludoviciana subsp. ludoviciana G. Schoolcraft 1999-8-11 2878 Lassen East edge of Madeline Plains e. of Ravendale. 1628 Comment
  SEINET230067  Artemisia nova Leila M. Shultz, John S. Shultz 1985-6-23 8602 Lassen 41 miles north of Susanville on Highway 395 1433 Comment
  SEINET251695  Artemisia nova Arnold Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 Rd miles N of Karlo Rd. on highway 395 from Litchfield to Alturas, Just E of the highway. 1402 Comment
  UCD149841  Artemisia spinescens William Anderson 1965-4-20 s.n. Lassen Wendel. Comment
  CHSC13797  Artemisia tridentata Cathy Crittenden 1970-7-8 28 Lassen Approx. 100 yds north of E. L. B. S. 1524 Comment
  CHSC5197  Artemisia tridentata P. Balch 1955-7-10 Lassen Fields adjoining Stafford's Ranch, Eagle Lake. 1584 Comment
  JEPS37010  Artemisia tridentata subsp. tridentata W. L. Jepson 1918-8-5 7819 Lassen Madelin Plains 1615 Comment
  SEINET3397751  Artemisia tridentata subsp. tridentata Unknown 1994-1 s.n. Lassen 15 mi. N. of Litchfield Comment
  SEINET3391559  Artemisia tridentata subsp. tridentata E. D. McArthur 1982-1 EDM- 1357 Lassen NW of Janesville. @ Jct of Co. Ros 205 & 219 Comment
  CAS-BOT-BC99281  Artemisia tridentata subsp. vaseyana G. Schoolcraft 1994-9-13 2431 Lassen Just above gate along road to Fredonyer Pk. lookout. 2255 Comment
  SEINET3397741  Artemisia tridentata subsp. vaseyana Unknown 1994-1 s.n. Lassen Sage Hen Summit - US 395 Comment
  CHSC26163  Asclepias cordifolia J. D. Detzer; Sacks 1977-6-10 36 Lassen Ca. 0.5 km s of Hwy 395, 4 km w of Milford. 1386 Comment
  POM76156  Asclepias cordifolia Marcus E. Jones 1897-7-2 s.n. Lassen Susanville 1524 Comment
  UC1123518  Asclepias cordifolia C. W. Hanks 1934-9-26 93 Lassen near Plumas National Forest (w side of valley); Sierraville Quadrangle, Long Valley Comment
  UC1096430  Asclepias speciosa George A. Fischer, Irwin H. Johnson 1933-7-29 F- 276 Lassen Stringer Lassen National Forest 1694 Comment
  SEINET199764  Asclepias speciosa George A. Fischer 1933-7-29 F- 276 Lassen Lassen National Forest; Stringer, in southwest corner of N.F. 1695 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
  CAS-BOT-BC177324  Astragalus agrestis G. Schoolcraft 1986-6-25 1642 Lassen About 3 miles N WW of Termo 1615 Comment
  NY790907  Astragalus agrestis G. Schoolcraft 1986-6-25 1642 Lassen About 3 miles northwest of Termo 1615.4 Comment
  CAS-BOT-BC177441  Astragalus andersonii M. S. Taylor 1982-5-29 4561 Lassen NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno Comment
  CDA26599  Astragalus andersonii T. C. Fuller 1965-6-3 13608 Lassen Driveway to the cemetery, Janesville. 0 Comment
  NY5381  Astragalus anxius R. J. Meinke 1991-7-16 6108 Lassen Ash Valley, ca 25 km W of Madeline, along Ash Valley Road, on boundary T38N, R11E, S32 and T37N, R11E, S5. 1550 Comment
  UC1483838  Astragalus anxius G. Schoolcraft 1980-8-14 307 Lassen w of Madeline; Ash Valley 1548 Comment
  NY790602  Astragalus argophyllus var. argophyllus A. Tiehm 1986-5-12 10347 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  CHSC5278  Astragalus canadensis var. brevidens 1944-6-28 Lassen Eagle Lake. 1615 Comment
  RSA614427  Astragalus canadensis var. brevidens Richard Halse 1991-7-28 4247 Lassen along Hwy 139, NE end of Eagle Lake, 21 miles N of Susanville. 1558 Comment
  SFV1777  Astragalus curvicarpus I. L. Wiggins, D. B. Wiggins 1961-6-11 16331 Lassen 13.5 miles east of Susanville. 1240 Comment
  RSA111043  Astragalus curvicarpus H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-15 5752 Lassen NE of Litchfield. 1234 Comment
  JEPS54557  Astragalus curvicarpus var. curvicarpus T. Brandegee 1892-6-23 Lassen Honey Lake Comment
  SEINET7103990  Astragalus curvicarpus var. curvicarpus T. N. Kaye 1990-6-27 1254 Lassen Ash Valley Road, 16 miles east of Adin.; 0 Comment
  CHSC106082  Astragalus filipes Lowell Ahart; John Dittes 2010-7-31 16976 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
  CHSC29935  Astragalus filipes Robin Ondricek; Robert Ediger 1978-6-6 37 Lassen 1 mi S of Colley Point Overlook on Hwy 139. 1670 Comment
  CHSC37299  Astragalus filipes M. S. Taylor; B. Hammond 1982-7-8 4790 A Lassen At gate near RR Xing just off Scott Rd, ca. 5 mi s of Constantia. 1402 Comment
  CDA26669  Astragalus filipes T. C. Fuller 1965-8-26 14038 Lassen Haskell Parks range, Diaz Flat, ca. 5 miles east of Hayden Hill, northwest Lassen County. 0 Comment
  SEINET231384 Image available Astragalus filipes Margaret J. Williams 1983-7-31 83- 125 -1 Lassen Ash Valley Road, 17 mi from Aden 1829 Comment
  SEINET5325729  Astragalus filipes M. J. Williams 1983-7-31 83- 125 -1 Lassen Ash Valley road, 17 mi from Aden. 1829 Comment
  CAS-BOT-BC186852  Astragalus gibbsii M. E. Jones 1897-6-24 s.n. Lassen 10-15 miles w. of Amedee 1219 Comment
  CDA26675  Astragalus gibbsii Taylor Jun 1938 Lassen Susanville. 0 Comment
  POM24454  Astragalus inversus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA111019  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 5740 Lassen 3 miles west of Susanville. Comment
  SEINET5324147  Astragalus iodanthus var. iodanthus A. Tiehm 1980-1 5755 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1231 Comment
  CAS-BOT-BC229050  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC187156  Astragalus lentiginosus var. chartaceus John Thomas Howell 1934-7-6 12437 Lassen Harvey Valley 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
  CAS-BOT-BC187154  Astragalus lentiginosus var. chartaceus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49230 Lassen On Highway 395, 7 miles southeast of Milford 1280 Comment
  CAS-BOT-BC187159  Astragalus lentiginosus var. floribundus Arnold Tiehm 1980-5-29 5751 Lassen North end of Honey Lake Valley, 1 mile north of Wendel 1231 Comment
  NY675574  Astragalus lentiginosus var. floribundus N. H. Holmgren 1980-7-5 9520 Lassen Upper Smoke Creek drainage, 20.4 km (12.7 miles) from U. S. Highway 395 via Rye Patch Canyon, 24 km (15 miles) airline distance southeast of Ravendale 1580 Comment
  NY675579  Astragalus lentiginosus var. floribundus A. Tiehm 1980-5-29 5751 Lassen North end of Honey Lake Valley, 1 mile north of Wendel 1231 Comment
  CHSC67216  Astragalus lentiginosus var. platyphyllidius James D. Jokerst 1991-5-29 3310 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
  JEPS114762  Astragalus lentiginosus var. salinus Lowell Ahart, John Dittes 2008-6-19 14889 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
  SBBG128879  Astragalus lentiginosus var. salinus L. Ahart 2011-6-20 17510 Lassen near edge of Ash Valley Rd, 3120 feet S of Ash Crk Cmpgrd, ca. 6.5 mi (air) SE of Adin 1511 Comment
  CAS-BOT-BC187561  Astragalus malacus Mrs. C. C. Bruce 1898-6-1 2214 Lassen Madaline Plains & Modoc Comment
  CHSC7666  Astragalus malacus Beverley J. Wise 1969-5-3 55 Lassen 4.6 mi. east of junction of Hwy 395 on Las. Co. road 338 (Smoke Creek Road). 1554 Comment
  CHSC98309  Astragalus pulsiferae var. coronensis R. Ondricek-Fallscheer 2003-6-7 210 Lassen About 27 air mi NE of Susanville, 9 air mi SSE of Ravendale, and 0.5 air mi NW of Rye Patch Springs; 0.5 mi E of Hwy 395 and 150 ft. N of road to Ramhorn Springs Campground. 1615 Comment
  SEINET240400  Astragalus pulsiferae var. coronensis S. L. Welsh, ND Atwood 2001-6-14 28150 Lassen E of Hwy 395, road to Rams Horn Spring campground 1540 Comment
  CHSC91331  Astragalus pulsiferae var. pulsiferae Lowell Ahart; John Dittes 2005-6-1 11871 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  SEINET5324389  Astragalus pulsiferae var. pulsiferae M. J. Williams 1974-7-26 74 L-16 Lassen 2 mile W of Hallelujah Junction, S of Hwy 70. 1494 Comment
  UC372929  Astragalus pulsiferae var. pulsiferae Marcus E. Jones, A. M. 1897-6-19 Lassen Chat 1615 Comment
  SEINET5324187  Astragalus pulsiferae var. pulsiferae P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Cal Comment
  SEINET5324574  Astragalus pulsiferae var. pulsiferae M. J. Williams 1974-7-26 74 -L-16 Lassen Burn area, W of Hwy 395 and Near Hwy 70. 1494 Comment
  CHSC7668  Astragalus purshii Beverley J. Wise 1969-4-21 57 Lassen 6 mi. south of Susanville on Las. Co. Rd. 204 (Gold Run Road). 1310 Comment
  SJSU8415  Astragalus purshii J. W. Tilden 1960-6-27 1498 Lassen outskirts of Westwood, foot of Moonlight Rd 1524 Comment
  CAS-BOT-BC194087  Astragalus purshii var. purshii Louella Bass 1973-6-12 102 Lassen Elysian Valley - Sierra Nevada 1325 Comment
  POM45166  Astragalus purshii var. tinctus T. S. Brandegee 1892-6-23 s.n. Lassen Honey Lake Comment
  RSA339987  Astragalus whitneyi Noel Holmgren 1980-7-4 9514 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale. 2195 Comment
  UC82594  Astragalus whitneyi T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CHSC5284  Astragalus whitneyi var. siskiyouensis V. Holt 1945-6-1 Lassen Eagle Lake. Comment
  CAS-BOT-BC199134  Astragalus whitneyi var. siskiyouensis H. D. Ripley; R. C. Barneby 1943-6-14 5747 Lassen Hidden Valley E of Susanville 1584 Comment
  CAS-BOT-BC199136  Astragalus whitneyi var. siskiyouensis Duane Isely; Isabelle Isely 1971-7-11 11378 Lassen Near apex of ascent south of Eagle Lake, near state #139 1676 Comment
  NY701852  Astragalus whitneyi var. siskiyouensis H. D. D. Ripley 1943-6-14 5747 Lassen Hidden Valley, east of Susanville 1585 Comment
  NY701856  Astragalus whitneyi var. whitneyi N. H. Holmgren 1980-7-4 9514 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 2190 Comment
  NY652203  Atriplex argentea var. hillmanii G. Schoolcraft 1989-5-16 1874 Lassen West of Highway 395 about 2 miles south of Karlo turnoff 1356.4 Comment
  CHSC76091  Atriplex argentea var. mohavensis Lowell Ahart; Vernon Oswald 1999-9-13 8207 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
  NY526733  Atriplex canescens R. F. Hoover 1940-10-5 4668 Lassen Wendel Comment
  JEPS120466  Atriplex canescens var. canescens L. P. Janeway, B. Castro 2012-7-2 10920 A Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake, 1.5 km north of Wendel, 0.8 km east of the road to Wendel. Comment
  UC1567451  Atriplex gardneri var. falcata G. Schoolcraft 1989-5-16 1877 Lassen Secret Valley w Hwy 395; Secret Valley 1347 Comment
  UC768839  Atriplex gardneri var. falcata R. F. Hoover 1940-10-5 4677 Lassen alkali plain s Secret Valley; s of Secret Valley Comment
  CHSC100131  Atriplex truncata L. P. Janeway 2008-8-2 9528 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
  CAS-BOT-BC106555  Balsamorhiza John Thomas Howell 1976-7-20 52011 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek - Sierra Nevada 1432 Comment
  CAS-BOT-BC106491  Balsamorhiza hookeri Louella Bass 1973-6-15 113 Lassen Elysian Valley - Sierra Nevada Comment
  CAS-BOT-BC106497  Balsamorhiza hookeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49167 Lassen In open yellow pine forest, Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  JEPS30490  Balsamorhiza hookeri Peter H. Raven and Otto T. Solbrig 1958-6-17 13292 Lassen o.4 mi s, along U.S. Highway 395 Ravendale Comment
  UC1035988  Balsamorhiza hookeri Helen K. Sharsmith 1955-6-22 4501 Lassen 5 miles beyond Blue Lake on road to Likely. Warner Mountains, Modoc National Forest Comment
  UC1368790  Balsamorhiza hookeri John L. Strother 1970-5-23 957 Lassen 6 mi n Honey Lake 1280 Comment
  UCD129523  Balsamorhiza hookeri Geo C. Wood 1940-4-18 s.n. Lassen Coffin Ranch near Susanville. Comment
  UC1119024  Balsamorhiza sagittata C. W. Hanks 1934-8-18 56 Lassen n part of Upper Long Valley (Sierraville); Sierraville 1463 Comment
  UC1794997  Balsamorhiza sagittata R. K. Brummitt 1998-5-17 19900 Lassen 2 km W of Susanville on Rte. 36 1350 Comment
  CHSC114353  Balsamorhiza sagittata B. Villegas 2011-5-20 Lassen Susanville. Comment
  CHSC5234  Barbarea orthoceras A. Santos 1946-6-12 Lassen Eagle Lake. Pine Creek. 1584 Comment
  SEINET11997544  Barbarea orthoceras N. H. Holmgren, Holmgren, P. K. 1978-1 8919 Lassen vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28 km E of Ravendale & 1680 Comment
  CHSC76094  Bassia hyssopifolia Lowell Ahart 1999-9-13 8206 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
  CHSC99983  Bassia hyssopifolia L. P. Janeway 2008-8-2 9525 Lassen Modoc Plateau. Honey Lake Valley, 4.9 air km southeast of Standish, along Mapes Road 0.3 km east of Lambert Lane. 1222 Comment
  SEINET3872219  Bassia hyssopifolia Richard R. Halse 2010-8-25 8088 Lassen Along State Hwy. 139 ca 26.2 miles north of Susanville on the northeast shore of Eagle Lake.; 0 1559 Comment
  UC37450  Beckmannia syzigachne J. Burtt Davy Jun 17 1897-Jun 24 1897 3315 Lassen Honey Lake Valley Comment
  UC573777  Beckmannia syzigachne H. S. Yates 1936-8-11 6078 Lassen 2 mi ese Susanville; Susanville Quadrangle 1280 Comment
  UC790979  Beckmannia syzigachne A. A. Beetle 1941-6-28 2813 Lassen lower slopes of peak 6 mi s Ravendale; Observation Peak Comment
  UCD56782  Beckmannia syzigachne Leo Whitney 1934-8-6 2210 Lassen Honey Lake Valley. Bank of Susan River. 1371 Comment
  CHSC110167  Berberis aquifolium var. aquifolium V. Lockie 2010-5-1 Lassen Location: Just off of Highway 139, east side of road, approx. 8.25 miles NE of Susanville, CA on Antelope Mountain. 1630 Comment
  CAS-BOT-BC76025  Berberis repens Parkison 1916-6-17 13 Lassen Lassen Forest. North slope Crater Mountain. 1706 Comment
  CDA38212  Berula erecta T. C. Fuller 1963-7-15 10891 Lassen South of road to Pittsville, 5.4 miles northwest of Little Valley. 0 Comment
  CAS-BOT-BC169400  Betula glandulosa John Thomas Howell 1934-7-9 12514 Lassen Bridge Creek Spring 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
  CHSC29912  Bidens cernua Robin L. Ondricek 1978-8-26 125 Lassen Below dam at Murrers Upper Meadow. 1548 Comment
  JEPS32533  Bidens cernua R. F. Hoover 1940-10-1 4661 Lassen near, between Jonesville and Standish Honey Lake Comment
  CDA10495  Bidens cernua var. cernua Gordon Leppig 1998-8-17 1047 Lassen Northern California Peatlands; Modoc National Forest. Blue Lake Ranch. Comment
  CAS-BOT-BC128040  Blepharipappus scaber Elmer I. Applegate 1934-5-4 8922 Lassen Sagebrush plains at south end of Secret Valley 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
  CDA19752  Blepharipappus scaber D. Tillotson 1942-6-9 s.n. Lassen Modoc Plateau; Mud Flat. 0 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
  CHSC48131  Blepharipappus scaber Vernon H. Oswald 1986-6-15 2112 Lassen Hwy 36, 15.0 mi E of Plumas-Lassen Co. line, 3.5 mi E of Fredonyer Pass. 1508 Comment
  SBBG30617  Blepharipappus scaber D. Myrick 1968-6-19 1958 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  SEINET9331153  Blepharipappus scaber Unknown 1974-8-20 1932 Lassen Survey w/ state and county personnel, Hallelujah Jct, NW corner of jct of US hwy 495 and hwy 70. USGS Quad: 15' Plant Systematics Lab/Herbarium CDA, California Dept. of Food & Agric Comment
  UC1393121  Blepharipappus scaber John L. Strother 1970-5-23 953 Lassen 6 mi n of Honey Lake 1280 Comment
  UC604683  Blepharipappus scaber Farris Farris 1935-5-20 Lassen Susanville 1341 Comment
  CHSC40529  Boechera pauciflora J. D. Jokerst 1983-5-30 1798 Lassen Along the SW side of the road to Knox Mt. ca 1 mile north of its junction with the road that connects Aden and Madeline. Comment
  UC1542747  Boechera pendulocarpa Barbara Ertter with Gary Schoolcraft 1987-6-16 7179 Lassen ca 1 mi w Hot Springs VABM (ne side of Honey Lake); Skeedaddle Mountains 1828 Comment
  UC1608995  Boechera pinetorum Vernon H. Oswald and Lowell Ahart 1993-6-3 5488 Lassen between Poison Lake and Susanville (Champs Flat Rd (Lassen 105, Forest 32N28Y), 7.0 mi n of its junction with Lassen 21 (32N02) to Eagle Lake, just s of ford over Pine Cr.) 1688 Comment
  CHSC101020  Boechera retrofracta John Dittes 2008-5-22 1533 Lassen Modoc Plateau; ca 15.4 air miles southeast of Adin, ca. 3.6 air miles east of Hayden Hill, ca. 0.2 mile southeast of intersection of Hwy 139 and FS Road 36N02; edge of wooded volcanic toe-slope on northeast side of Willow Creek. 484 Comment
  CHSC91294  Boechera retrofracta Lowell Ahart; John Dittes 2005-6-2 11926 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  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
  CHSC36460  Boechera sparsiflora Susan H. Euing 1982-6-6 14 Lassen Pine Creek below fish trap. Comment
  CAS-BOT-BC25677  Boechera sparsiflora H. D. Ripley; R. C. Barneby 1944-3-29 5948 Lassen South of Constantia. 1447 Comment
  CAS-BOT-BC25706  Boechera sparsiflora Reed Clark Rollins; Kathryn W. Rollins; Aileen Roads 1983-7-5 83226 Lassen Plumas National Forest. Above Laufman Ranger Station. 4.5 miles east of US Highway 395. Comment
  CHSC92737  Brodiaea coronaria subsp. coronaria L. P. Janeway 2005-7-3 8455 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
  CAS-BOT-BC149496  Bromus briziformis John Thomas Howell 1977-6-22 52398 Lassen Northeast of Susanville on road to Eagle Lake. Comment
  CAS-BOT-BC149499  Bromus briziformis B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6572 Lassen U.S. Highway 395 1.3 km south of railroad crossing and 12. 9 km north of Litchfield. 1330 Comment
  CHSC110715  Bromus briziformis Dean Wm. Taylor 2005-6-29 19380 Lassen Modoc Plateau. Piute Creek, 3 miles west from western edge Susanville. 1310 Comment
  CHSC36486  Bromus briziformis Margaret E. Halloran 1982-6-2 2 Lassen Ca. 5 yds n of Ravendale Rd, ca. 3 1/2 mi e of jct. Hwy 139 and Ravendale Rd. Comment
  UCD57495  Bromus briziformis Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen Few miles north of Litchfield. Comment
  SEINET3921581  Bromus briziformis Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 9489 Lassen Rye Patch Canyon Road, 3.4 km (2.1 mi) east of U.S. Highway 395, 14.5 km (9 mi) airline distance southeast of Ravendale.; 0 1700 Comment
  CAS-BOT-BC149584  Bromus carinatus var. carinatus John Thomas Howell 1973-7-10 49778 Lassen Sierra Nevada. Fredonyer Pass. 1737 Comment
  UC1024795  Bromus carinatus var. carinatus Leo Whitney 1935-6-10 3212 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10 Lassen National Forest; , Fruit Grower's Supply Company Comment
  UC1136817  Bromus carinatus var. carinatus George A. Fischer, Irwin H. Johnson 1933-7-12 F 231 Lassen Lassen National Forest, Patterson Flat Patterson Flat; Lassen National Forest, Patterson Flat 1737 Comment
  UC53631  Bromus carinatus var. carinatus M. S. Baker and Frank Nutting 1894-7-5 Lassen s of Dixie Valley Comment
  CAS-BOT-BC149158  Bromus carinatus var. marginatus John Thomas Howell; Gordon H. True 1973-8-1 50199 Lassen Sierra Nevada. Ca. 3 miles southeast of Disamond Mountain. East slope of Diamond Range south of Susanville. 2194 Comment
  UCD59149  Bromus carinatus var. marginatus H. P. Hagge 1929-9-16 s.n. Lassen Logan Mtn. 1828 Comment
  CAS-BOT-BC155940  Bromus commutatus G. Schoolcraft 1986-6-17 1624 Lassen North side of Tuledad Canyon near Nevada state line. 1554 Comment
  UCD58457  Bromus commutatus A. A. Beetle 1941-6-28 2810 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UCD58463  Bromus commutatus L. D. Whitney 1935-6-23 s.n. Lassen Fruit Growers Supply Co., Camp #10. Comment
  UCD58854  Bromus inermis John Thomas Howell; Gordon H. True 1973-8-1 50221 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. 2164 Comment
  CHSC5253  Bromus inermis subsp. inermis P. Balch 1955-7-23 Lassen Stafford's Eagle Lake Resort. 1569 Comment
  CDA1826  Bromus japonicus T. C. Fuller 1963-6-1 10626 Lassen East side of road to Susanville, 3.2 miles south of Pittville. 0 Comment
  SEINET10717734  Bromus japonicus Vernon H. Oswald, Lowell Ahart 1999-6-9 Oswald 9750 Lassen T31N R15E SE 1/4 Sect. 18. Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Comment
  UC1024947  Bromus madritensis subsp. rubens Leo Whitney 1935-6-21 3322 Lassen 13 mi w of n end of Eagle Lake (Squaw Valley); Squaw Valley Comment
  RSA126867  Bromus marginatus G. A. Fischer, I. H. Johnson 1933-7-12 F 231 Lassen Patterson Flat. Lassen Forest. Comment
  UC1037125  Bromus marginatus Leo Whitney 1935-6-19 3262 a Lassen near Camp 10 (Lassen National Forest, Fruit Grower's Supply Company); Lassen National Forest, Fruit Grower's Supply Company Comment
  UC1037147  Bromus marginatus Leo Whitney 1935-7-6 3429 Lassen near Pit River (Lassen National Park); Lassen National Park Comment
  CAS-BOT-BC162179  Bromus orcuttianus John Thomas Howell; Gordon H. True 1973-7-31 50029 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1737 Comment
  UC1136819  Bromus suksdorfii George A. Fischer and Irwin H. Johnson 1933-7-14 F 261 Lassen Lassen National Forest 1783 Comment
  CHSC23519  Bromus tectorum Wayne O. Baum 1971-7-5 71 -15 Lassen S. slope of Gallatin Peak. 2042 Comment
  CHSC31983  Bromus tectorum L. Ahart; J. T. Howell 1974-7-9 535 Lassen Along the rd 4.5 mi w of Susanville. 1584 Comment
  RSA715626  Bromus tectorum L. Ahart, John Dittes 2005-6-1 11909 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. Comment
  UC1024872  Bromus tectorum Leo Whitney 1935-5-26 3155 Lassen 10 mi e of Adin (Ash Creek); Ash Creek Comment
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Jun 24 2009
  UC1131267  Bromus tectorum H. S. Yates 1936-8-12 6085 Lassen McKenzie Meadow 1524 Comment
  UC773967  Bromus tectorum L. R. Short, J. Warren 1936-6-9 S 409 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1859 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
  UCD57782  Calamagrostis stricta subsp. inexpansa A. A. Beetle 1941-6-28 2805 Lassen 10 miles W of Chester. 1524 Comment
  CHSC99528  Calandrinia ciliata Lowell Ahart; John Dittes 2008-6-22 15030 Lassen On the banks of a small natural drainage, 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
  CHSC112410  Callitriche heterophylla Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18750 Lassen Drainage filled with dirt from construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  POM85831  Callitriche heterophylla var. bolanderi Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  UC1101514  Callitriche verna Verne Grant and Irving Schneider 1947-9-6 8385 Lassen creek midway between Eagle Lake and Susanville Comment
  CHSC12426  Calocedrus decurrens Anne Linda Brisk 1969-6-20 12 Lassen 5.5 mi S of ELBS on Road 5.16.2. 1920 Comment
  SEINET11051598  Calocedrus decurrens D. Charlet 1996-7-8 2289 Lassen Sierra NV, Diamond Mountains, East Canyon, Milford Grade, Laufman Campground. 1620 Comment
  UC1523812  Calochortus leichtlinii Gary Schoolcraft 1983-7-19 1096 Lassen s slope Fredonyer Peak 2255 Comment
  UC3407  Calochortus leichtlinii M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  POM109563  Calochortus leichtlinii Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  SEINET4169872  Calochortus leichtlinii A. A. Heller 1938-6-26 Lassen E. of Fredonyer Pass on State Hwy 36. 1219 Comment
  CHSC27637  Calochortus macrocarpus J. D. Prouty 1978-7-26 27 Lassen Gorilla's Roost to Stone's Ranch Rd., SE of Eagle L. 1584 Comment
  UCD105297  Caltha leptosepala K. M. Meyer; A. Townesmith 2007-7-21 145 Lassen Lassen National Forest. 3.3 mi. on rd. 110, off Hwy. A 21. 1920 Comment
  CHSC67062  Calyptridium umbellatum Willis Ball 1969-6-20 16 Lassen Found beside road on Dean's Ridge. 1950 Comment
  JEPS17206  Calyptridium umbellatum Frances D. Payne 1929-7-12 101 Lassen Lost Lake, Camp I Lost Lake; Warner Mountains, , Camp I 2286 Comment
  UC420619  Calyptridium umbellatum Franklin P. Nutting Lassen Pine Creek Comment
  SDSU5718  Calystegia occidentalis subsp. occidentalis D. F. Howe 1964-8-1 3915 Lassen Modock National Forest. 1829 Comment
  CHSC107327  Camassia quamash subsp. breviflora Lowell Ahart; John Dittes 2011-6-20 17492 Lassen Depression in meadow, about 40 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
  HSC30047  Camassia quamash subsp. breviflora D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19197 Lassen Harvey Valley near Cone Springs Comment
  CAS-BOT-BC497552  Camassia quamash subsp. breviflora John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49223 Lassen Elysian Valley northwest of Janesville 1325 Comment
  JEPS61547  Camassia quamash subsp. quamash Leland S. Smith 1927-6-10 14 Lassen Lassen National Forest, Norvell Flat Norvell Flat; Lassen National Forest, Norvell Flat 1747 Comment
  JEPS109919  Camelina microcarpa D. W. Taylor 2007-6-14 20130 Lassen S end of Grasshopper Valley County Road 512 1 mile W of junction with Hwy 139. Comment
  CHSC4969  Camissonia R. Carter 1967-6-23 540 Lassen Along rd to Murrer's Meadow. 1584 Comment
  NY850974  Camissonia boothii subsp. alyssoides A. A. Heller 1938-6-23 15212 Lassen About midway between Mapes and Secret Valley on U.S. Highway #395. 1372 Comment
  UCD55153  Camissonia contorta Ellen Dean 2006-5-15 3041 Lassen E of town of Susanville. Along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. 1248 Comment
  RSA186635  Camissonia contorta Peter H. Raven 1962-5-28 17872 Lassen 4.8 miles north of Milford Comment
  HSC81475  Camissonia tanacetifolia Thomas W. Nelson, Jane P. Nelson 1980-7-6 6011 Lassen Along Adin-Madeline Rd., 15 mi. E of Adin in Ash Valley just beyond bridge at baths 1555 Comment
  NY852081  Camissonia tanacetifolia N. H. Holmgren 1980-7-3 9477 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) west of U.S. Higwhay 395 from a turnoff 10.3 km (6.4 mi) south of Madeline 1620 Comment
  CAS-BOT-BC160835  Camissonia tanacetifolia subsp. quadriperforata John Thomas Howell 1934-6-10 11857 Lassen 3 miles n. of Omira Comment
  POM38369  Camissonia tanacetifolia subsp. quadriperforata F. H. Hillman 1897-7-12 s.n. Lassen Chat. Comment
  RSA12158  Camissonia tanacetifolia subsp. quadriperforata Wayne E. Sawyer 1935-6-27 219 Lassen Long Valley. 1311 Comment
  CAS-BOT-BC160859  Camissonia tanacetifolia subsp. tanacetifolia A. M. Vollmer; L. Beane 1953-7-1 41 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  RSA339989  Camissonia tanacetifolia subsp. tanacetifolia Noel Holmgren, Patricia K. Holmgren 1980-7-3 9477 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi.) west of U.S. Highway 395 from a turnoff 10.3 km (6.4 mi.) south of Madeline 1616 Comment
  RSA512846  Camissonia tanacetifolia subsp. tanacetifolia J. T. Howell, Gordon H. True 1973-8-1 50209 Lassen Sierra Nevada: Headwaters of Baxter Creek, east slope of Diamond Range, south of Susanville. 2165 Comment
  JEPS114631  Capsella bursa-pastoris Lowell Ahart, John Dittes 2008-6-22 15033 Lassen On the banks of a small natural drainage, 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
  JEPS94549  Cardamine breweri Vernon Oswald and Lowell Ahart 1997-6-24 8618 Lassen 2.7 mi e of boundary of Lassen National Forest (s of Susanville, on n side of Diamond Mountain at an impoundment on the edge of Forest Road 29N43, 7.4 mi e of Gold Run Road (29N10)); Diamond Mountain, Forest Road 29N43 2036 Comment
  CAS-BOT-BC37252  Cardamine breweri Louella Bass 1980-5-22 s.n. Lassen Sierra Nevada. Bagley Springs along Susan River between Devil's Corral and Susanville. Comment
  UC117814  Cardamine nuttallii var. covilleana Brandegee 1892-7-2 Lassen Susanville Comment
  UC1924259  Cardaria chalepensis Debra Valov 2004-5-31 2004228 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CHSC112417  Carex Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18770 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC85988  Carex abrupta L. P. Janeway 2003-7-24 7918 Lassen High Cascade Range. Small meadow below Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.6 (air) km west of Clover Valley. 1920 Comment
  CHSC85992  Carex angustata L. P. Janeway 2003-7-24 7912 Lassen 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
  UC142947  Carex angustata A. L. Hormay 1941-6-18 5 Lassen Little Harvey Valley Lassen National Forest, Little Harvey Valley 1676 Comment
  JEPS96097  Carex aquatilis var. aquatilis Vernon H. Oswald and Lowell Ahart 1996-6-17 7813 Lassen Bizz Johnson Trail at milepost 6.0 e Devils Corral Trailhead (<trailhead> located off Hwy 36 w of Susanville); Modoc Plateau 1420 Comment
  SEINET13327167  Carex aquatilis var. aquatilis J. Atchley 1993-5-5 1 Lassen Along willow creek. 1219 Comment
  CAS-BOT-BC18106  Carex athrostachya T. C. Fuller 1980-8-5 20309 Lassen 28 km. (17.5 mi.) northeast of Ravendale. Campground on east shore of Dodge Reservoir. Stream adjacent to the boat ramp. Comment
  CAS-BOT-BC18107  Carex athrostachya James Stokes 1939-6-15 s.n. Lassen Bullard Lake west of Grasshopper Valley. Comment
  CAS-BOT-BC19067  Carex aurea John Thomas Howell 1976-7-19 51969 Lassen Sierra Nevada. On Gold Run Creek southwest of Susanville. 1386 Comment
  CAS-BOT-BC19394  Carex bolanderi John Thomas Howell; Gordon H. True 1973-8-1 50175 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  UC2015834  Carex breweri Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4443 Lassen Lassen Volcanic National Park. Lassen Peak, near parking area. Comment
  CHSC110089  Carex davyi Barbara L. Wilson; Peter 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
  CHSC68770  Carex douglasii Vernon H. Oswald; Lowell Ahart 1997-5-27 8502 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. 1546 Comment
  JEPS100621  Carex douglasii Dean W. Taylor 1974-6-14 3716 Lassen Poison Lake, on Hwy 44 ca. 2 miles W from the junction with Pittville Road 1615 Comment
  JEPS94486  Carex douglasii Vernon H. Oswald and Lowell Ahart 1997-5-27 8519 Lassen 2.6 mi ne of Highway 139 (Williams Reservoir on Forest Route 38MN04 between Highway 139 near Willow Creek Guard Station and Coyote Flat); Williams Reservoir, Forest Route 38MN04 1682 Comment
  POM80614  Carex douglasii Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC803  Carex douglasii J. Burtt Davy Jun 17 1897-Jun 24 1897 3289 Lassen Honey Lake Valley 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
  SEINET7557452 Image available Carex douglasii John Thomas Howell 1934-7-6 12450 Lassen Harvey Valley. 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
  HSC48360  Carex filifolia var. erostrata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19171 Lassen Open pasture in Harvey Valley near Cone Springs Comment
  HSC103600  Carex fracta Thomas W. Nelson, Jane Nelson 1985-8-10 8011 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC22236  Carex haydeniana John Thomas Howell 1934-6-14 12164 Lassen Near Lost Lake. Warner Mountains. 2438 Comment
  SEINET7587564 Image available Carex heteroneura L. P. Janeway 2003-7-24 7915 A Lassen Swain Mountain 7.5' Quad, High Cascade Range, along Forest Service Road 30N14 1.1 km from Road 30N21. Small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  HSC48184  Carex hoodii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19242 Lassen 2 mi. N of Westwood Comment
  JEPS63616  Carex hoodii Leland S. Smith 1922-7-18 78 Lassen Martin Springs Meadow, Lassen National Forest Comment
  HSC48078  Carex lanuginosa D. H. Norris, F. J. Hermann 1972-5-17 22628 Lassen Deep canyon 18 mi. N of Litchfield on Hwy. 395 (milepost 94.6) Comment
  JEPS88667  Carex lenticularis var. impressa Dean W. Taylor 1975-8-24 5407 Lassen margin of Everett Lake Thousand Lake Wilderness Area, Magee Peak, Everett Lake 2307 Comment
  CDA33106  Carex limosa Gordon Leppig, J. Cromwell 1997-7-27 610 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  HSC46422  Carex mariposana D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19178 Lassen Harvey Valley near Cone Springs 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
  CHSC66271  Carex nebrascensis Vernon H. Oswald; Lowell Ahart 1996-6-24 7882 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. Meadow on the E side of Papoose Creek N of the springs. 1633 Comment
  UCD140685  Carex nebrascensis Jack Major 1966-6-24 s.n. Lassen above Blue Lake, Warner Mountains, Modoc National Forest, northeastern Lassen County (ca. 18 miles airline southeast of Likely.) 1905 Comment
  CAS-BOT-BC119715  Carex nervina Clare B. Hardham 1961-6-17 7508 Lassen Baxter Creek south of Susanville. Comment
  CHSC77245  Carex pellita G. Schoolcraft 1995-7-11 2504 Lassen Along Silver Creek. 1767 Comment
  CHSC93433  Carex petasata Martin J. Lenz 2004-6-23 221 Lassen Approx. 0.6 air mi. WSW of Schoonamaker Lake. UTM 10 664213 E 4515435 N. Edge of seasonally wet meadow. 1707 Comment
  UC1136943  Carex petasata George A. Fischer, Irwin H. Johnson 1933-7-12 F 235 Lassen Patterson Flat Lassen Forest 1737 Comment
  CHSC91380  Carex praegracilis Lowell Ahart; John Dittes 2005-6-1 11879 Lassen Near springs on a small hill, about 3/4 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. 1470 Comment
  JEPS107838  Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11877 Lassen about 3/4 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 Comment
  SEINET7572131 Image available Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11879 Lassen About 3/4 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. 1470 Comment
  UCD55306  Carex praegracilis Ellen Dean; Gary Schoolcraft 2006-5-16 3135 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. 1251 Comment
  CDA33131  Carex praegracilis T. C. Fuller 1980-8-6 20319 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  JEPS109091  Carex preslii D. W. Taylor 2008-6-19 20226 Lassen Unnamed meadow equidistant between Papoose Meadwo and Mahogany Lake Comment
  POM81761  Carex sheldonii Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  CHSC110302  Carex simulata L. P. Janeway; B. Castro 2012-7-2 10930 Lassen Modoc Plateau. East side of Skedaddle Mountains; large meadows along Skedaddle Creek, just upstream from 'Skedaddle Ranch. 1600 Comment
  HSC95226  Carex simulata Gordon Leppig 1998-8-17 1046 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95228  Carex simulata Gordon Leppig 1998-7-12 956 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS96099  Carex simulata Vernon H. Oswald and Lowell Ahart 1996-6-17 7815 Lassen Bizz Johnson Trail at 6.0 mi post e Devils Corral Trailhead (<trailhead> located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 Comment
  HSC97395  Carex straminiformis L. P. Janeway 2003-7-24 7917 Lassen High Cascade Range, along FS 30N14, 1.1 km from FS 30N21, upper Susan River, 4.7 mi. W of Clover Valley 1932 Comment
  CAS-BOT-BC116615  Carex subfusca Hans Leschke 1960-8-8 1738 Lassen Below trail Ski Hut-Crumbaugh Lake. 1981 Comment
  CAS-BOT-BC116621  Carex subfusca Leo David Whitney 1934-8-2 1971 Lassen Moist stream bank, Bridge Creek Camp. 1737 Comment
  CAS-BOT-BC116625  Carex subfusca Alice Eastwood; John Thomas Howell 1940-6-15 8304 Lassen Willow Creek near Hayden Hill. Comment
  UC2031880  Carex subfusca Nick Otting 2003-7-17 695 Lassen Cascade Mountains, Susan River, 1/2 mile NE of Devil's Corral, 5 air miles west of Susanville. Comment
  CAS-BOT-BC116617  Carex subfusca B. Clear 1938-7-14 s.n. Lassen Manzanita Lake, Lassen Park. Comment
  CHSC60439  Carex utriculata Mary Ann Showers 1992-6-13 2544 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  HSC95273  Carex vesicaria Gordon Leppig 1998-7-12 942 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET7579960 Image available Carex vesicaria George W. Gillett 1957-7-22 879 Lassen Lassen Volcanic National Par, Snag Lake, matin of gravel bars along south shore. 1850 Comment
  CAS-BOT-BC114881  Carex whitneyi John Thomas Howell 1959-9-23 s.n. Lassen North end of Juniper Lake, Lassen Park. 2057 Comment
  HSC48217  Carex whitneyi D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19237 Lassen 2 mi. N of Westwood Comment
  CHSC14085  Castilleja angustifolia K R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5841 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  JEPS23795  Castilleja angustifolia Rimo Bacigalupi with Lincoln Constance 1959-7-16 7140 Lassen 0.25 mi s U.S. Hwy. 395 junction with road Smoke Creek (beside U.S. Hwy 395) 1341 Comment
  CAS-BOT-BC249612  Castilleja applegatei subsp. pinetorum M. S. Taylor; B. Hammond 1982-8-27 5052 Lassen Crystal Peak, Diamont Mts, ca. 6 air mi sw of Doyle 2377 Comment
  CAS-BOT-BC249622  Castilleja applegatei subsp. pinetorum John Thomas Howell 1934-7-9 12527 Lassen Harvey Valley Comment
  CHSC7749  Castilleja applegatei subsp. pinetorum Beverley J. Wise 1969-5-11 103 Lassen West city limits of Susanville at 'Inspiration Point. 1341 Comment
  CHSC7751  Castilleja applegatei subsp. pinetorum Beverley J. Wise 1969-5-3 106 Lassen 28.4 mi. N.E. of Susanville. 1554 Comment
  CHSC91291  Castilleja applegatei subsp. pinetorum Lowell Ahart; John Dittes 2005-6-2 11929 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
  UC1542945  Castilleja applegatei subsp. pinetorum G. Schoolcraft 1987-5-6 1699 Lassen n end Eagle Lake (near Stone Ranch) 1554 Comment
  RSA428370B  Castilleja arachnoidea Christopher Davidson 1974-7-25 2500 Lassen Lassen Volcanic nat. Park, at Juniper Lake. 2134 Comment
  JEPS3595  Castilleja campestris subsp. campestris Helen-Mar Wheeler 1952-7-11 Lassen s of Madeline Comment
  UC1484795  Castilleja campestris subsp. campestris Noel H. Holmgren and Patricia K. Holmgren 1978-6-10 8903 Lassen 9 mi ene Termo (and 8 air distance); Madeline Plains, Coyote Flat 1630 Comment
  CHSC115227  Castilleja chromosa B. Castro; L. P. Janeway. 2015-6-5 2094 Lassen Great Basin. Near the SE corner of the Warner Mtns. Along W side of Tuledad Toad ca 3 air mi NE of Dodge Reservoir and 0.5 road-mi S of W end of Tuledad Canyon, on gentle NE-facing slope. 1661 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
  JEPS81867  Castilleja lacera L. R. Heckard with J. C. Hickman 1982-5-11 5841 Lassen about 2.5 mi w Paynes Creek (along Highway 36 to Mt Lassen (6.5 mi ne of Dales)) 518 Comment
  OBI75870  Castilleja lemmonii Anthony Baniaga 2011-8-10 495 Lassen Lassen Natl Forest. Barnes Flat. Swain Mtn quad. T30N R8E sec 9 SE of SE 1769 Comment
  CHSC6268  Castilleja linariifolia P. Balch 1955-7-21 Lassen Willow Creek, Eagle Lake. 1463 Comment
  JEPS126474  Castilleja linariifolia Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-8-10 CA 350 -067 Lassen North on 395, right on 502, right on 503 (Horn Road), right on Observation Peak Road. Comment
  JEPS76163  Castilleja linariifolia T. I. Chuang with Fei-Mei Chuang 1977-7-25 7660 Lassen 10 mi w Madeline Comment
  JEPS80682  Castilleja linariifolia L. R. Heckard and T. I. Chuang 1981-6-10 5533 Lassen e side (s end) Eagle Lake (along Route 139) 1524 Comment
  HSC63893  Castilleja linariifolia Teresa Prendusi 1980-7-1 Lassen McCoy Flat, 5 mi. E of northern tip of Eagle Lake 1646 Comment
  UC485781  Castilleja miniata H. E. and S. T. Parks Jun 1928 250 Lassen Drakesbad; Lassen National Park Comment
  CAS-BOT-BC244890  Castilleja miniata Alice Eastwood 1912-8-22 1808 Lassen Foot of Lassen Butte Comment
  POM44361  Castilleja miniata Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 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
  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
  RSA59750  Castilleja psittacina E. K. Balls 1950-5-19 14778 Lassen 17.5 mi. W. of Madeline on rd. from Adin. 1677 Comment
  CHSC112415  Castilleja tenuis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18773 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107826  Castilleja tenuis Lowell Ahart, John Dittes 2005-6-2 11962 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  JEPS124373  Castilleja tenuis Lowell Ahart, John Dittes 2015-7-13 20314 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS96025  Castilleja tenuis Vernon H. Oswald and Lowell Ahart 1996-6-24 7841 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi ne of Eagle Lake Rd (A1), Papoose Meadows, w side of meadow just s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1567425  Castilleja tenuis G. Schoolcraft 1989-6-12 1913 Lassen Ash Valley RNA/ACEC Ash Valley 1554 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
  RSA0034899  Caulanthus inflatus Bob Thille 1964-3-14 Lassen 3 miles south of Atola, Highway 395. 883 Comment
  SEINET210873  Ceanothus cordulatus N. H. Holmgren, JJ Fay; BLBethers 1970-6-24 4373 Lassen 2 miles west of Westwood at edge of airstrip 1554 Comment
  UCD111387  Ceanothus cordulatus C. B. Heiser Jr. 1947-7-13 s.n. Lassen near Westwood. Comment
  CDA5726  Ceanothus prostratus Gary Schoolcraft 2000-4-25 2890 Lassen 3.5 miles north of Susanville along Highway 139. Comment
  CHSC5069  Ceanothus prostratus D. L. Stites 1967-7-1 111 Lassen On Black Mt. 5 mi s of Eagle Lake Biology Station. 1828 Comment
  CHSC6249  Ceanothus prostratus J. B. Kimsey 1946-6-17 Lassen Mt. Fredonyer. 2133 Comment
  POM339726  Ceanothus prostratus F. R. Fosberg 1969-8-15 51427 Lassen 10miles W of Susanville Comment
  RSA122369  Ceanothus prostratus G. A. Fischer, Irwin H. Johnson 1933-2-14 263 Lassen Lassen Forest 1768 Comment
  UC1071531  Ceanothus velutinus A. Simontacchi 1940-6-4 797 Lassen 7.1 mi sw Jacks Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC52439  Ceanothus velutinus var. velutinus Jeanne Janish; Carl Janish 1938-9-4 s.n. Lassen above upper Twin Lake, Lassen National Park 2042 Comment
  CAS-BOT-BC277001  Centaurea diffusa T. C. Fuller 1962-8-28 9481 Lassen E. side of Hwy 395 to Madelaine, 1.9 mi. n. of Termo Comment
  CDA7223  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen East side of Highway 395 to Madelaine, 1.6 miles north of Termo. 0 Comment
  UC1229867  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen E side of Hwy 395 to Madelaine, 1.6 mi N of Termo Comment
  UCD130020  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen east side of Highway 395 to Madelaine, 1.6 mile north of Termo. Comment
  CDA7341  Centaurea squarrosa Loring White Jul 1950 Lassen Kramer Ranch, Big Valley, just over line Modoc-Lassen. 0 Comment
Read comments
May 19 2009
  JEPS78140  Centaurea virgata subsp. squarrosa Sally Levingson 1972-7-19 99 Lassen 2 mi east of Beiber on Highway A2 beside the road. 975 Comment
  UC1042560  Centaurea virgata subsp. squarrosa Loring White 1950-8-9 Lassen Cramer Ranch Big Valley Comment
  RSA186838  Centaurea virgata subsp. squarrosa T. C. Fuller 1966-7-20 14961 Lassen Both sides of road from 0.1 to 0.9 miles south of the bridge at Pittville Comment
  UC1561829  Centaurium exaltatum Barbara Ertter 1987-7-24 7305 Lassen ca 0.75 mi ene Beckwourth Pass (at the end of old crumbling paved road) 1524 Comment
  CHSC93679  Centaurium tenuiflorum Lowell Ahart; John Dittes 2005-6-2 11977 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
  CHSC7715  Cerastium fontanum subsp. vulgare Beverley J. Wise 1969-5-23 5 Lassen Susanville--833 Mark St. Garden. 1310 Comment
  JEPS114633  Cerastium glomeratum Lowell Ahart, John Dittes 2008-6-20 14966 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  CDA25720  Cercocarpus ledifolius T. C. Fuller 1963-7-15 10899 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  CHSC23520  Cercocarpus ledifolius var. ledifolius Wayne O. Baum 1971-6-28 71 -47 Lassen E. slope of Gallatin Peak. 2103 Comment
  CHSC80142  Chaenactis douglasii Jeanne Boze 1981-6-11 102 Lassen Along roadside, 5.5 mi from Hwy 139 on Horse Lake Road. 1676 Comment
  CHSC48134  Chaenactis douglasii var. douglasii Vernon Oswald 1986-6-15 2116 Lassen Hwy 139, 8.6 mi ne of Susanville. 1615 Comment
  HSC81187  Chaenactis douglasii var. douglasii Thomas W. Nelson, Jane P. Nelson 1980-7-6 5993 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  CAS-BOT-BC276612  Chaenactis douglasii var. douglasii David D. Keck; J. Clausen 1935-6-25 3755 Lassen Susanville, just W of town 1300 Comment
  UC1777700  Chaenactis douglasii var. douglasii Donald W. Kyhos 1967-9-1 67 -88 Lassen Mt. Lassen National Park. Area within 1/2 mile north of Hat Lake. Pumice slopes Comment
  UCD19670  Chaenactis douglasii var. douglasii Donald W. Kyhos 1967-9-1 67 -88 Lassen Mt. Lassen National Park. In the devastated area within 1/2 mile north of Hat Lake. Comment
  JEPS107309  Chaenactis stevioides 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
  CHSC4937  Chamaebatiaria millefolium W. Lessig 1967-7-15 30 Lassen 1/8 mi se of Eagle Lake Biology Station. 1554 Comment
  CHSC6251  Chamaebatiaria millefolium 1944-7-16 Lassen West side of Eagle Lake. 1584 Comment
  HSC29997  Chamaesaracha nana D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19160 Lassen 3 mi. N of Westwood Comment
  CDA41125  Chamaesaracha nana T. C. Fuller 1962-6-13 8997 b Lassen 0.5 mile south of Highway 36 to Chester, 2 miles west of Westwood. 0 Comment
  CHSC112769  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Dittes 2013-7-22 18847 Lassen West margin of a duck field, about 30 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 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
  CHSC99743  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Dittes 2008-6-20 14913 Lassen On the levee road and in vernal pools, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  JEPS121256  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-7-22 18855 Lassen 30 yards S of a man-made pond, about 120 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC6188  Chamerion angustifolium subsp. circumvagum P. Balch 1955-7-23 Lassen Eagle Lake. Paul Bunyan road, 3 1/2 mi. from Susanville. Comment
  SD211585  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen Circa 3/4 mile East-Northeast of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  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
  CHSC45516  Chimaphila menziesii Lowell Ahart; John Thomas Howell 1974-7-9 538 Lassen On the south side of Eagle Lake Road, near the south edge of Eagle Lake. 1584 Comment
  CHSC6235  Chimaphila menziesii P. Balch 1955-7-22 Lassen Eagle Lake. Between Eagle Lake and Pittville road. 1676 Comment
  UC1483860  Chimaphila menziesii G. Schoolcraft 1980-7-15 311 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  CHSC21064  Chrysolepis sempervirens M. S. Taylor 1975-7-16 842 Lassen On trail between Echo Lake and Summit Lake, Lassen National Park. 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
  UCR67461  Chrysothamnus nauseosus George K. Helmkamp 1990-9-23 D- 10 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  CDA36350  Chrysothamnus nauseosus B. Villegas 2011-8-25 Lassen Highway 395 just above Doyle. 0 Comment
  CDA10774  Chrysothamnus nauseosus subsp. albicaulis M. R. Pryor 1953-9-22 Lassen Stacey. 0 Comment
  CHSC66850  Chrysothamnus viscidiflorus subsp. lanceolatus Vernon H. Oswald 1996-9-21 8287 Lassen Modoc Plateau. Willow Creek Wildlife Area on Hwy. 139 ca. 10 mi (air) N of Susanville. Levee, along the S edge of Willow Creek ca. 1 mi E of the parking area on the highway. 1490 Comment
  CAS-BOT-BC100758  Chrysothamnus viscidiflorus subsp. puberulus P. Monnet 1913-7-1 792 Lassen Hot Spring Peak 1524 Comment
  JEPS94839  Chrysothamnus viscidiflorus subsp. viscidiflorus Vernon H. Oswald and Lowell Ahart 1998-9-8 9587 Lassen Kramer Road 3.1 mi s of Lookout; Kramer Road 1280 Comment
  UC1776665  Chrysothamnus viscidiflorus subsp. viscidiflorus G. Schoolcraft 1994-9-13 2430 Lassen Just above gate along road to Fredonyer Pk. lookout 2255 Comment
  UC1186580  Chylismia claviformis subsp. integrior G. I. Stage and R. W. Thorp 1959-6-20 59 -116 Lassen 9.6 mi n Litchfield Comment
  POM35788  Cichorium intybus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  POM352119  Cichorium intybus George Willet 1935-6-28 s.n. Lassen Susanville Comment
  CAS-BOT-BC184828  Cinna latifolia Clare B. Hardham 1971-8-22 18408 Lassen Diamond Mountain. 2133 Comment
  UC1119176  Cirsium andersonii H. P. Hagge 1929-9-14 32 Lassen Logan Mtn. Eagle Lake Quad. 1828 Comment
  CAS-BOT-BC277934  Cirsium canovirens T. C. Fuller 1959-7-7 2739 Lassen Hwy. 395 6 miles/north/road to Karlo Comment
  CAS-BOT-BC277936  Cirsium canovirens T. C. Fuller 1959-7-7 2739 Lassen Hwy. 395, 6 miles north/road to Karlo Comment
  CDA1170  Cirsium cymosum T. C. Fuller 1963-7-16 10921 -B Lassen West of Hwy 395; 14.3 miles south of Ravendale. 0 Comment
  CHSC60715  Cirsium cymosum Vernon H. Oswald; Lowell Ahart 1993-6-14 5533 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). Between road and lake. 1566 Comment
  CAS-BOT-BC278011  Cirsium cymosum T. C. Fuller 1959-7-7 2740 Lassen 7 mi N/road to Karlo Comment
  UCD20369  Cirsium cymosum Joe DiTomaso 2002-6-5 s.n. Lassen about 3 miles northwest of the junction between Nevada, Modoc, and Lassen counties. Comment
  UCD21445  Cirsium douglasii Don Lancaster 2002-9-1 s.n. Lassen Blue Lake. 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-BC280058  Cirsium neomexicanum T. C. Fuller 1980-8-5 20312 Lassen 0.4 km. east of the campground, east shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  JEPS59279  Cirsium occidentale var. californicum W. L. Jepson 1918-8-4 7807 Lassen Horse Lake 1554 Comment
  SEINET10725916  Cirsium occidentale var. candidissimum Karen M. Meyer, Andrew Townesmith 2007-7-21 Meyer 143 Lassen Lassen National Forest. 1.3 mi. on rd. 110, off Hwy. A21. 1821 Comment
  CDA1490  Cirsium ochrocentrum T. C. Fuller 1965-10-13 14199 Lassen Madeline Plains E base of Dry Valley Ridge, 10 mi. W of Termo, 3 mi N of Termo-Grasshopper Rd. Comment
  CDA1525  Cirsium ochrocentrum T. C. Fuller 1980-8-5 20311 Lassen 28 km NE of Ravendale; east shore of Dodge Reservoir, 0.4 km east of campground. Comment
  RSA186826  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14983 Lassen East of road at the east base of Dry Valley Ridge, Madelaine Plains, 3 miles north of paved road, 10 miles west of Termo. Comment
  CDA1522  Cirsium ochrocentrum var. ochrocentrum Lee Wheeler, T. C. Fuller 1518-58 1958-11-12 s.n. Lassen Honey Lake M. Mallery (Mallory) ranch, Susanville. (4 mi SE of Susanville). 0 Comment
  CAS-BOT-BC286311  Cirsium scariosum B. Bartholomew; B. Anderson 1988-6-25 4370 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  CDA1562  Cirsium scariosum var. americanum D. Chambers, M. Carstens 1979-8-22 s.n. Lassen Modoc National Forest, private inholding, south side of Juniper Creek. 0 Comment
  RSA186831  Cirsium undulatum T. C. Fuller 1966-7-22 14981 Lassen East of road at the east base of Dry Valley Ridge, Madelaine Plains, 3 miles north of paved road, 10 miles west of Termo. 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
  CDA37870  Cirsium undulatum J. L. Johnson 1980-7-9 s.n. Lassen Madeline Plains. 0 Comment
  CAS-BOT-BC169804  Cistanthe rosea H. D. Ripley; R. C. Barneby 1943-6-18 5464 Lassen Smoke Creek, NE of Viewland 1402 Comment
  CHSC92753  Clarkia gracilis subsp. gracilis L. P. Janeway 2005-7-4 8465 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 1752 Comment
  CHSC27720  Clarkia lassenensis Robert A. Schlising; S. Morey, D. Ikeda 1978-6-8 3284 Lassen E of Eagle Lake, on slopes between Lower Dry Lake and Murrers Upper Meadow. 1569 Comment
  CAS-BOT-BC163166  Clarkia lassenensis G. Schoolcraft 1993-6-29 2308 Lassen Ash Valley RNA between Adin & Madeline 1554 Comment
  CAS-BOT-BC163420  Clarkia purpurea subsp. quadrivulnera Louella Bass 1978-7-11 78 -12 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC163410  Clarkia purpurea subsp. quadrivulnera H. D. Ripley; R. C. Barneby 1943-6-13 5718 Lassen South of Johnstonville 1325 Comment
  CAS-BOT-BC164864  Clarkia rhomboidea A. M. Vollmer; L. Beane 1953-7-1 35 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CAS-BOT-BC164866  Clarkia rhomboidea Louella Bass 1973-5-29 EV 63 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC164869  Clarkia rhomboidea Clare B. Hardham 1961-6-16 7447 Lassen S. of Susanville Comment
  CHSC83619  Clarkia stellata L. P. Janeway 2001-6-28 7233 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
  JEPS120869  Claytonia rubra subsp. depressa Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18742 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1136746  Claytonia rubra subsp. rubra A. Simontacchi 1940-5-21 758 Lassen 4.1 mi sse Blacks Mtn.; Lassen National Forest, Halls Flat Quad. 1737 Comment
  UC773923  Claytonia rubra subsp. rubra L. R. Short and Wm. Gansberg 1936-6-2 S- 359 Lassen Burgess Spring Experimental Range; Lassen Forest 1865 Comment
  NY222741  Cleome platycarpa D. W. McNeal 1978-5-30 2123 Lassen Along Hwy. #395, 3.4 mi. N of the jct of Co. Hwy. #320 (Wendel Rd.) at the Nobel Emigrant Trail Historical Marker. Comment
  POM93741A  Cleomella parviflora Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  RSA739646  Cleomella plocasperma L. P. Janeway, Linus Gog 2008-8-2 9530 Lassen Modoc Plateau just above th flats along the S side of Rusch Creek, S side of Smokey Creek Ranch road 1.8km W of the CA-NV line. 1349 Comment
  CDA25307  Cleomella plocasperma T. C. Fuller 1962-8-28 9474 Lassen Road to Wendell, 1 mile northwest of Herlong Siding, northeast of Honey Lake. 0 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
  JEPS11714  Collinsia parviflora F. W. Pennell 1940-6-9 25752 Lassen 7 mi n Madeline (along Rte 395) 1615 Comment
  UC1924582  Collinsia parviflora Debra Valov 2006-5-28 2006011 Lassen Bieber off County Rd. A2 c. 12 km east of Hwy 299 1279 Comment
  HSC63960  Collinsia parviflora Teresa Prendusi 1980-5-19 Lassen Saddle Rock. 1524 Comment
  HSC68935  Collinsia parviflora Gary Schoolcraft 1979-5-1 15 Lassen Along road between Big Springs and Shearing Corrals 1677 Comment
  SEINET13396903  Collinsia parviflora J. A. Young 1978-4-13 s.n. Lassen Meyers Ranch, near Adin. Comment
  SEINET3159383  Collinsia parviflora E. K. Balls 1950-5-9 4250 Lassen 6 mi S of Milford, Hwy 395 1295 Comment
  CHSC21170  Collinsia torreyi M. S. Taylor 1974-5-4 225 Lassen Ca. 500 yds n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  SBBG6889  Collinsia torreyi var. latifolia H. and M. Dearing 1938-6-30 2223 Lassen ca. 50 mi W of Susanville 1371 Comment
  CHSC59776  Collomia grandiflora Mary Meyer 1980-5-15 Lassen On slopes near creek along Secret Creek Canyon. 1371 Comment
  CHSC6198  Collomia grandiflora P. Collett 1946-6-24 Lassen Spalding's, Eagle Lake. 1554 Comment
  SEINET12318331  Collomia grandiflora Unknown 1978-1 22 Lassen Lower Dry Lakes,SE of Eagle L 1646 Comment
  UCD18964  Collomia grandiflora R. E. Francis 1965-7-7 6 Lassen Lassen National Forest, Harvey Valley Allotment. 1737 Comment
  JEPS94551  Collomia linearis Vernon Oswald and Lowell Ahart 1997-6-24 8621 Lassen 2.7 mi e of boundary of Lassen National Forest (s of Susanville on n side of Diamond Mountain at an impoundment on edge of Forest Rd 29N43 7.4 mi e of Gold Run Road (29N10)); Diamond Mountain, Forest Road 29N43 2036 Comment
  CHSC25914  Collomia tinctoria K. R. Stern 1967-7-1 2470 Lassen Ca. 2 mi. S of S end of Eagle Lake. 1676 Comment
  CHSC6200  Collomia tinctoria 1946-6-13 Lassen Eagle Lake. 1584 Comment
  CHSC80232  Collomia tinctoria Jeanne Boze 1981-6-12 109 Lassen On hillside along road to 5 corners about 3 mi from Eagle Lake Field Station. 1706 Comment
  JEPS28714  Collomia tinctoria George W. Gillett 1957-7-29 949 Lassen along trail between Butte Lake and Snag Lake; Lassen Volcanic National Park 1859 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
  HSC95339  Comarum palustre Gordon Leppig, J. Cromwell 1997-7-27 607 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CHSC6277  Corallorhiza maculata A. Santos 1946-7-11 Lassen Silver Lake. 1981 Comment
  POM107535  Corallorhiza striata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  JEPS88238  Cornus sericea subsp. sericea Vernon H. Oswald and Lowell Ahart 1996-6-17 7810 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36, at 6 mi. post e. of Devils Corral Trailhead); Modoc Plateau 1420 Comment
  UC1776697  Cornus sericea subsp. sericea G. Schoolcraft 1994-8-3 2424 Lassen About 1.5 miles SW of Boot Lake 2011 Comment
  CHSC75453  Crepis acuminata Vernon H. Oswald; Lowell Ahart 1999-6-9 9742 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
  UC581214  Crepis acuminata E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1736 Lassen on mountain above Red Rock (e-facing slope of gully) 1420 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
  UC581294  Crepis acuminata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2346 Lassen about 4 mi se Willow Creek Range Station (se of Adin) 1767 Comment
  CAS-BOT-BC290394  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2314 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
  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
  SJSU8354  Crepis intermedia W. Savage 1971-7-20 725 Lassen c. 2 mi N of Milford near W side Honey Lake 1264 Comment
  POM17695  Crepis monticola Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC91877  Crepis monticola T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  UC1136843  Crepis occidentalis L. R. Short and W. Gansberg S- 361 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1871 Comment
  UC581267  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2304 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  UC773984  Crepis occidentalis L. R. Short and Wm. Gansberg 1936-7-7 S- 476 Lassen Burgess Spring Experiment Station Lassen <National> Forest 1764 Comment
  UCD130971  Crepis occidentalis B. L. Kay 1961-6-28 s.n. Lassen 6 miles northwest of Madeline. Comment
  CAS-BOT-BC290750  Crepis occidentalis subsp. occidentalis Doris Kildale Gillespie 1930-5-12 9337 Lassen 2 miles north of Susanville on road to Alturas Comment
  CAS-BOT-BC376565  Crepis occidentalis subsp. occidentalis B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6566 Lassen U.S. Hwy 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield 1330 Comment
  UC581276  Crepis occidentalis subsp. occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-11 2320 Lassen w-facing slope about 1 mi below summit; Black Mt. 1940 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
  CDA4450  Crepis occidentalis subsp. pumila T. C. Fuller 1963-6-1 10619 Lassen West side of road to Susanville, 2.0 mi. south of Pittville. 0 Comment
  CHSC60650  Crocidium multicaule Vernon H. Oswald; Lowell Ahart 1993-4-17 5275 Lassen Near Wayman Barn at the W end of Hunt Rd., Ash Creek Wildlife Area, ca. 5 mi NE of Bieber. 1264 Comment
  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
  RSA0059645  Cryptantha ambigua Richard R. Halse 2004-8-8 6616 Lassen Along State Highway 139 ca. 6 miles north of Eagle Lake. 1710 Comment
  CHSC60275  Cryptantha circumscissa P. V. Caldwell 1972-6-16 226 Lassen Eagle Lake. Base of w slope of Blk. Mtn. 1554 Comment
  CHSC62440  Cryptantha circumscissa K. L. Chambers; Peter Dorris 1963-5-4 2028 Lassen Hwy. 395, 10 mi. n. of junction with Alt. Hwy. 40 (later renumbered Hwy. 70). Comment
  CHSC71074  Cryptantha circumscissa Vernon H. Oswald; Lowell Ahart 1998-5-22 9135 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. 1341 Comment
  HSC30196  Cryptantha circumscissa D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19301 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  UC577869  Cryptantha circumscissa E. Sawyer 1935-6-27 220 Lassen Long Valley Sierraville Quad. 1310 Comment
  GMDRC6449  Cryptantha humilis J. M. Andre, Glenn Clifton 1993-6-14 30004 Lassen northeast base of Shaffer Mtn near Secret Creek, about 20 miles ENE of Susanville 1646 Comment
  SEINET10906625  Cryptantha humilis Paul Gallian, David B. Dunn 1971-6-2 Gallian 507 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
  CHSC47980  Cryptantha intermedia Vernon Oswald 1986-6-15 2113 Lassen Hwy 36, 15.0 mi e of Plumas-Lassen Co. line, 3.5 mi e of Fredonyer Pass. 1508 Comment
  SJSU11374  Cryptantha intermedia M. D. Fleschner 1965-7-13 Lassen by Hwy 139, 14 mi NE of Susanville 1828 Comment
  JEPS107799  Cryptantha pterocarya var. pterocarya Lowell Ahart, John Dittes 2005-6-2 11982 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
  JEPS103198  Cryptantha simulans G. Schoolcraft 1993-6-29 2305 Lassen Ash Valley RNA 16 miles E of Adin S of T in Co. Road 1554 Comment
  UC24702  Cryptantha torreyana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC526168  Cryptantha torreyana John Thomas Howell 1934-7-10 12546 Lassen Long's Well Comment
  SDSU20527  Cryptantha torreyana var. torreyana Nuri Benet-Pierce, John P. Pierce 2012-7-14 529 Lassen Diamond Mountain 2054 Comment
  UC1134216  Cupressus bakeri D. Dunning 1935-11-7 Lassen 2 mi E of Burney Spring 1463 Comment
  CHSC23497  Cuscuta Wayne O. Baum 1971-7-14 71 -63 Lassen Gallatin Peak. 2011 Comment
  UCD54418  Cuscuta approximata Jerry Schmierer 1986-9-1 s.n. Lassen Don Blickenstaff Ranch. Comment
  CHSC43469  Cynoglossum occidentale Lowell Ahart; John Thomas Howell 1974-7-9 515 Lassen Along the edge of Eagle Lake Road, about 5 miles north-west of Susanville. 1584 Comment
  JEPS127205  Cystopteris fragilis Lowell Ahart, John Dittes 2016-6-7 21007 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  SEINET6627868  Cystopteris fragilis M. J. Williams 1970-7-4 s.n. Lassen Ash Creek, SE of Adin 1280 Comment
  CHSC59574  Damasonium californicum Mary Meyer 1980-6-1 559 Lassen Along creek off Champs Flat Road. 1677 Comment
  RSA0011557  Damasonium californicum Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46995 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  POM115072  Danthonia californica Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC506937  Danthonia californica var. americana George A. Fischer and Irwin H. Johnson 1933-7-12 F 236 Lassen Patterson Flat Lassen National Forest 1737 Comment
  UCD60868  Danthonia californica var. americana Mrs. Austin 1894-6-1 295 Lassen Lassen Creek. Comment
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Jul 11 2013
  CHSC60866  Danthonia unispicata Vernon H. Oswald; Lowell Ahart 1993-6-28 5579 Lassen Harvey Valley Rd. (33N02), 0.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1749 Comment
  SDSU4575  Deinandra lobbii D. F. Howe 1961-8-4 3135 Lassen 11.5 miles east of Mc Arthur on U.S. 299. 1372 Comment
  CAS-BOT-BC291779  Deinandra lobbii John Thomas Howell 1934-7-3 12380 Lassen Big Valley near Bieber Comment
  CHSC67595  Delphinium andersonii James D. Jokerst 1983-5-30 1794 Lassen Ca. 1.5 mi N of Eagle Lake, ca. 50 m W of Hwy. 139, ca. 1.0 mi N of Eagle Lake Rd. 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
  UC9127  Delphinium andersonii Mrs. C. C. Bruce June 1898 2238 Lassen Shumway Comment
  UCR244044  Delphinium andersonii Jim Andre 1993-6-1 19714 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  UC726247  Delphinium armeniacum A. A. Heller 1938-6-4 15149 Lassen 1 mile east of Fredonyer Pass east of Westwood. 1706 Comment
  RSA0005299  Delphinium armeniacum A. A. Heller 1938-6-4 15149 Lassen 1 mile east of Fredonyer Pass on hwy 36. 1707 Comment
  CAS-BOT-BC9942  Delphinium nudicaule A. A. Heller 1940-5-22 15663 Lassen Hill back of Westwood Cemetery on a cut over slope. This station is sevral miles west of the type station. Comment
  CAS-BOT-BC116468  Delphinium nuttallianum A. A. Heller 1938-6-4 s.n. Lassen ...about 2 miles south of Westwood 1463 Comment
  CAS-BOT-BC116043  Delphinium nuttallianum Mrs. H. C. Cantelow 1949-6-11 8 Lassen East slope of Fredonyer Pass. Comment
  UC1142937  Deschampsia cespitosa A. L. Hormay 1941-6-23 16 Lassen Burgess Spring 1676 Comment
  CAS-BOT-BC194258  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1943-7-10 49769 Lassen Near Westwood - Sierra Nevada 1554 Comment
  CAS-BOT-BC194261  Deschampsia cespitosa subsp. cespitosa John Thomas Howell; Gordon H. True 1973-8-1 50230 Lassen Headwaters of Boxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC194265  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-7-22 876 Lassen Snag Lake, margin of gravel bars 100 yards above lake near south shore - Lassen Volcanic National Park 1850 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
  CAS-BOT-BC192744  Deschampsia danthonioides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16328 Lassen Along southern shore of Eagle Lake Comment
  HSC100183  Deschampsia danthonioides J. P. Smith, J. O. Sawyer 2011-8-15 13379 Lassen Along Hwy. 36 at the intersection with the Bizz Johnson Trailhead Road. 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
  UCD62833  Deschampsia danthonioides Malcolm A. Nobs; S. Galen Smith 1949-7-21 1059 Lassen 4 miles N of Madeline. Comment
  CAS-BOT-BC192746  Deschampsia danthonioides Clarence R. Quick 1962-6-17 62 25 A Lassen Swains Hole, a manmade pond in sagebrush flat south of Blacks Experimental Station 1554 Comment
  SEINET10480673  Descurainia Mary Susan Taylor 1982-5-29 Taylor 4564 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  CAS-BOT-BC42987  Descurainia incisa subsp. incisa A. M. Vollmer; L. Beane 1953-7-1 13 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  UCD114633  Descurainia longipedicellata Grady L. Webster 1989-5-13 7709 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  SEINET5343182  Descurainia paradisa var. paradisa F. B. Headley 1915-5-28 s.n. Lassen Honeylake, Calif. Comment
  CHSC25061  Descurainia pinnata L. B. Barlow 1967-6-23 7 Lassen Vic. Eagle Lake Biological Station, east central side of Eagle Lake. 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
  CAS-BOT-BC43166  Descurainia pinnata subsp. brachycarpa Doris Kildale Gillespie 1930-5-12 9327 Lassen 2 miles north of Susanville on road to Alturas. Comment
  CAS-BOT-BC43167  Descurainia pinnata subsp. brachycarpa Doris Kildale Gillespie 1930-5-12 9325 Lassen 2 miles north of Susanville on road to Alturas. Comment
  JEPS108556  Descurainia pinnata subsp. halictorum L. P. Janeway 2005-7-4 8466 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  CHSC99284  Descurainia sophia Lowell Ahart; John Dittes 2008-6-20 14912 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC402570  Dicentra uniflora Duncan Dunning 1922-5-15 s.n. Lassen Lassen National Forest. Facht - Robber Creek 1524 Comment
  POM109921  Dichelostemma multiflorum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin s Ranch. 1463 Comment
  CHSC34409  Dieteria canescens Terrance Finn 1979-7-14 11 Lassen +/- .75 mi. from Hallelujah Junction, dirt road towards well. 1493 Comment
  UC1523714  Dieteria canescens var. canescens Gary Schoolcraft 1981-7-21 542 Lassen 1524 Comment
  CHSC60820  Dieteria canescens var. shastensis Vernon H. Oswald; Lowell Ahart 1993-6-28 5596 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, between Grays Valley and Harvey Valley, E of Poison Lake. 1734 Comment
  HSC42427  Dieteria canescens var. shastensis Barbara Kelly 1977-8-9 562 Lassen 16 1/4 miles E of Madeline Comment
  UC1119608  Dieteria canescens var. shastensis H. S. Yates 1936-8-11 6077 Lassen near Johnstonville; Susanville Quad. Comment
  CAS-BOT-BC209003  Digitaria sanguinalis John Thomas Howell 1976-7-19 51941 Lassen Susanville - Sierra Nevada 1296 Comment
  CHSC4832  Diplacus jepsonii R. Carter 1967-7-14 602 Lassen Growing on n side of rd. ca. 3.5 mi e of Silver Lake between rd (31N07) and Susan River. 1828 Comment
  CHSC13945  Diplacus mephiticus M. S. Taylor 1974-7-6 311 Lassen On Gallatin Peak overlooking Gallatin Beach, ca. 13 mi nw of Susanville. Comment
  CHSC4812  Diplacus mephiticus R. Carter 1967-7-7 577 Lassen Collected outside dining hall, n side, 15 yds from building. 1524 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
  SEINET13703699  Diplacus mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8673 Lassen Near Old Chat. Comment
  CAS-BOT-BC151428  Diplacus nanus Doris Kildale Gillespie 1930-5-12 9354 Lassen Between Susanville and Leavitt Lake Comment
  CAS-BOT-BC154008  Diplacus torreyi Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16316 Lassen 2 miles E of Plumas-Lassen County line, along California Highway 36, near Westwood Comment
  SBBG15309  Diplacus torreyi H. and M. Dearing 1938-7-1 2245 Lassen 17 mi W of Susanville Comment
  CHSC91302  Distichlis spicata Lowell Ahart; John Dittes 2005-6-2 11922 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
  SD7836  Dodecatheon Mrs. R. M. Austin August 1882 Lassen Kings Valley Comment
  CHSC7735  Dodecatheon alpinum Beverley J. Wise 1969-4-20 82 Lassen 14.7 mi. north of Susanville on Hwy 139. 1463 Comment
  UC773868  Dodecatheon conjugens L. R. Short 1936-4-28 S- 331 Lassen Burgess Spring Experiment Range , Burgess Spring Experiment Range (Lassen National Forest) 1767 Comment
  CHSC4896  Dodecatheon jeffreyi Bill Wilson 1967-7-15 203 Lassen Collected at Upper Murrer Meadow, 2.5 mi. E of Eagle Lake Biological Station, 10 mi. N of Susanville. 1524 Comment
  CHSC5223  Downingia bacigalupii J. B. Kimsey 1946-6-11 Lassen Eagle Lake. Pine Creek. 1584 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
  CHSC95386  Downingia bacigalupii H. Chappel; J. Goldhammer, K. Moran, K. Strassman 2002-7-9 ALT- 018 Lassen Ecoregion 4. Muck Valley (at top of mountain pass). 1386 Comment
  JEPS108474  Downingia bacigalupii Lisa Schultheis 1995-6-28 233 -95 Lassen SW of Nubeiber, off of 299; S side of road at entrance to Muck Valley Hydroelectric Plant.. Comment
  CHSC59527  Downingia bicornuta Mary Meyer 1980-7-9 506 Lassen Horse Camp Springs, down-stream in cow pod. 1706 Comment
  SBBG69660  Downingia bicornuta S. W. Hutchinson -Jun-1925 492 Lassen near Eagle Lake 1554 Comment
  JEPS87497  Downingia bicornuta var. bicornuta Vernon H. Oswald and Lowell Ahart 1993-7-8 5649 Lassen on s.e. edge Poison Lake (Pittville Rd. (Lassen 111, 36N01) 1.9 mi. n. of Hwy. 44, e. side of R.R., which parallels the lake shore at this point) 1709 Comment
  UC1536877  Downingia elegans G. H. True 1936-6-25 527 Lassen Harvey Valley 1706 Comment
  SJSU3191  Downingia insignis R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline, Madeline Plains 1615 Comment
  UC1520665  Downingia insignis Noel H. Holmgren and Patricia K. Holmgren 1978-6-10 8902 Lassen 9 mi ene (8 mi air distance) Termo; Madeline Plains, Coyote Flat 1630 Comment
  SJSU3581  Downingia insignis P. L. Billings 1965-7-13 76 Lassen near Nubieber 1274 Comment
  JEPS24763  Downingia laeta John H. Weiler, L. Constance, E. Molseed 1960-6-13 60164 Lassen 1.7 mi. s. Ravendale (w. side of U.S. 395) 1615 Comment
  POM312373  Downingia laeta Malcolm A. Nobs, S. Galen Smith 1949-7-20 1047 Lassen Bieber, along Hwy 299 Comment
  CAS-BOT-BC41953  Draba albertina John Thomas Howell 1934-6-30 12132 Lassen Warner Mountains. Near Lost Lake. 2438 Comment
  JEPS94137  Draba verna Vernon H. Oswald and Lowell Ahart 1998-5-22 9128 Lassen ca. 5 mi. n.e. Doyle (rd. to summit of Fort Sage Mts., 2.7 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1463 Comment
  CHSC91326  Draba verna var. aestivalis Lowell Ahart; John Dittes 2005-6-1 11901 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  JEPS107454  Draba verna var. aestivalis Lowell Ahart, John Dittes 2005-6-1 11901 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  CHSC71071  Eatonella nivea Vernon H. Oswald; Lowell Ahart 1998-5-22 9122 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., 5 mi NE of Doyle. 1463 Comment
  UC1483817  Eatonella nivea G. Schoolcraft 1980-5-8 226 Lassen sw of Herlong 1255 Comment
  JEPS95911  Elaeagnus angustifolia Lowell Ahart 1999-9-13 8223 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
  RSA233772  Elatine R. F. Thorne, C. W. Tilforth, K. Thorne 1969-9-5 39134 a Lassen Said Valley Reservoir Comment
  RSA772653  Elatine R. F. Thorne, Larry E. DeBuhr 1975-8-22 47213 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CHSC112750  Elatine californica Lowell Ahart; John Dittes 2013-7-22 18882 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA252456  Elatine gracilis R. F. Thorne, C. W. Tilforth, K. Thorne 1969-9-5 39135 Lassen Said Valley Reservoir. Comment
  HSC7304  Eleocharis acicularis Fred J. Kindel 1955-6-15 Lassen Mt. Meadows Reservoir, Westwood Comment
  UCD54550  Eleocharis parvula Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2734 Lassen E. of town of Susanville. Private property N of California Correctional Facility. 1248 Comment
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Oct 5 2010
  UCD55302  Eleocharis parvula Ellen Dean; Gary Schoolcraft 2006-5-16 3131 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. 1251 Comment
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Oct 5 2010
  RSA127038  Eleocharis quinqueflora Robert W. Gardner 1939-6-15 G- 36 Lassen Little Harvey Valley 1700 Comment
  HSC95334  Eleocharis suksdorfiana Gordon Leppig, Tony LaBanca, L. Arguello 1997-6-28 515 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET190966  Elymus A. A. Beetle 1941-6-28 2803 Lassen 10 mi W of Chester Rte 36 Comment
  JEPS120873  Elymus caput-medusae Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18749 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
  SEINET12737887  Elymus cinereus M. Church 2016-7-26 14 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1412 Comment
  CHSC7700  Elymus condensatus Beverley J. Wise 1969-5-23 130 Lassen 35 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  JEPS122360  Elymus elymoides Joseph Broberg, Jaycee Leonard 2012-7-31 CA 320 -117 Lassen From Alturas head south on Highway 395. At the town of Termo turn left onto Juniper Ridge road. Then turn left into the Mendibourne wildlife game management area. Collection is across a fence in BLM land Comment
  UC1024958  Elymus elymoides subsp. elymoides Leo Whitney 1935-6-24 3304 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC1136931  Elymus elymoides subsp. elymoides L. R. Short and J. Warren 1936-6-29 S- 461 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1820 Comment
  UC53733  Elymus elymoides subsp. elymoides J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  UC773976  Elymus elymoides subsp. elymoides L. R. Short and J. Warren 1936-6-29 S- 461 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1820 Comment
  HSC22391  Elymus elymoides var. californicus D. E. Anderson 1969-7-5 4996 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  JEPS126494  Elymus elymoides var. californicus Alia Johnson, Jocelyn Munoz, Jillian Sarazen 2016-7-5 CA 350 -73 Lassen Heading north on 395 turn right on to Smoke Creek Road and drive up the road towards the uphill to where the Rush fire burned. Comment
  JEPS126503  Elymus elymoides var. californicus Jocelyn Munoz 2016-8-17 CA 350 -80 Lassen Heading north on 139, turn right onto Horse Lake Road. Continue east on Horse Lake Road passed lake. Take a left on an unnamed road about 3.5 miles east of lake. Then turn right on the first unnamed road with a NW aspect. Comment
  JEPS128171  Elymus elymoides var. californicus M. C. Mahoney, J. A. Nash 2017-7-31 CA 350 -86 Lassen On Fredonyer Peak. From Susanville take Highway 139 N towards Eagle Lake and turn right following signs for Fredonyer Peak Fire Lookout. Towards the top, stay right at both forks in the road. Follow the road past the last fork for two miles. Population is on both sides of the road. Comment
  JEPS121261  Elymus glaucus Lowell Ahart, John Dittes 2013-7-23 18893 Lassen About 30 feet NE of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UCD62312  Elymus glaucus A. A. Beetle 1941-6-28 2803 Lassen 10 miles W of Chester, rte 36. Comment
  CAS-BOT-BC206735  Elymus glaucus subsp. glaucus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49446 Lassen Elysian Valley, west of Janesville - Sierra Nevada 1325 Comment
  JEPS127708  Elymus spicatus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -161 Lassen Juniper Ridge Road, before split with Juniper Tree Road. Population North of road. Comment
  UC1024684  Elymus trachycaulus Leo Whitney 1933-8-3 2161 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  UC1024951  Elymus trachycaulus Leo Whitney 1935-6-25 3314 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC60832  Elymus trachycaulus M. S. Baker and Frank Nutting 1894-7-5 Lassen mts. s Dixey Valley Comment
  SEINET10561204  Elymus triticoides subsp. multiflorus Howell 1973-6-28 Howell 49522 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CHSC25297  Ephedra viridis Pauleen Broyles 1977-5-30 141 Lassen Spencer's Spring ca 8 km nne of Herlong. 1620 Comment
  CHSC6215  Ephedra viridis J. B. Kimsey 1946-6-17 Lassen N. Horse Lake. Eagle Lake. 1554 Comment
  CHSC7186  Ephedra viridis Lynn R Thomas 1969-3-6 9 Lassen 75 yds. W of US 395 ca. 26 mi ne of Susanville (nr rail and highway intersection at Viewland). 1347 Comment
  CHSC89  Ephedra viridis 1928-5-28 Lassen Antelope grade north of Susanville. 1615 Comment
  CHSC93239  Ephedra viridis John Dittes; Scott Chamberlain 2004-6-28 1022 Lassen Modoc Plateau; Long Valley; ca. 5.5 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.5 air-miles west of Hwy 395, ca. 1.3 air-miles east of Plumas County line; near meadow edge. 1496 Comment
  SEINET10532271  Ephedra viridis Mary Susan Taylor 1982-5-29 Taylor 4563 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  CHSC113058  Epilobium brachycarpum Lowell Ahart; John Dittes 2013-7-22 18845 Lassen West margin of a duck field, about 10 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC25092  Epilobium brachycarpum K. R. Stern 1967-7-1 2441 Lassen Murrer Meadow Road, ca. 2.5 mi. SE of Eagle Lake Biology Station. 1554 Comment
  CHSC106066  Epilobium campestre Lowell Ahart; John Dittes 2010-7-31 16996 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
  JEPS127267  Epilobium campestre Lowell Ahart, John Dittes 2016-7-13 21128 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
  UC1523739  Epilobium campestre Gary Schoolcraft 1981-9-1 571 Lassen se of Bieber (along road) 1255 Comment
  CHSC99524  Epilobium ciliatum subsp. glandulosum Lowell Ahart; John Dittes 2008-6-20 14948 Lassen In meadow, about 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  NY1001467  Epilobium ciliatum var. ciliatum M. A. Nobs 1949-8-20 1471 Lassen Honey Lake Valley, 1 mile south of Milford Comment
  CHSC30611  Epilobium hallianum G. A. Brown 1975-7-7 1 Lassen Gallatin Peak, western slope. 1990 Comment
  JEPS39254  Epilobium hallianum Brown and Wieslander 1922-7-23 38 Lassen Martin Sprs. Eagle Lake Comment
  CHSC61052  Epilobium oregonense Vernon H. Oswald; Lowell Ahart 1993-8-3 5741 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  SJSU10675  Epilobium oregonense J. W. Tilden 1960-6-27 1517 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  SEINET10453023  Epilobium oregonense Mary Susan Taylor 1974-1 Taylor 279 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  JEPS127276  Epilobium pallidum Lowell Ahart, John Dittes 2016-7-13 21127 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
  HSC95345  Epilobium palustre Gordon Leppig 1998-8-17 1049 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1122350  Epilobium torreyi A. Simontacchi 1940-6-30 905 Lassen 2.2 mi ene Ebey Lake 1699 Comment
  JEPS77524  Equisetum hyemale subsp. affine L. R. Heckard with T. I. Chuang and R. C. Bacigalupi 1978-7-20 4894 Lassen junction of Blue Lake turn-off with Likely-Patterson Guard Station rd.; Warner Mts. 1889 Comment
  CHSC91598  Eragrostis cilianensis G. Douglas Barbe 1978-8-31 2425 Lassen Modoc National Forest. Roadside, Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). 1417 Comment
  CAS-BOT-BC284042  Eragrostis minor John Thomas Howell 1976-7-19 51942 Lassen Susanville, Sierra Nevada 1287 Comment
  JEPS94837  Eragrostis pectinacea var. pectinacea Vernon H. Oswald and Lowell Ahart 1998-9-8 9578 Lassen Highway 299 at the Rail Road overpass on the e side of Nubieber Nubieber; , Highway 299 1255 Comment
  CAS-BOT-BC174122  Eremogone aculeata Clare B. Hardham 1971-8-22 18426 Lassen Diamond Mountain 2346 Comment
  RSA0045087  Eremogone congesta Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC174189  Eremogone congesta var. congesta Mrs. R. M. Austin; Mrs. Bruce 1898-6-1 2156 Lassen [Madaline] Madeline Plains Comment
  CAS-BOT-BC174204  Eremogone congesta var. congesta Louella Bass 1973-6-3 91 Lassen Elysian Valley 1325 Comment
  CHSC60826  Eremogone congesta var. congesta Vernon H. Oswald; Lowell Ahart 1993-6-28 5582 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  CHSC68856  Eremogone congesta var. subcongesta Vernon Oswald; Lowell Ahart 1997-6-24 8632 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  UC20409  Eremothera boothii subsp. alyssoides Mrs. C. C. Bruce Jun 1898 2139 Lassen Shumway Comment
  CHSC64796  Eremothera minor Vernon H. Oswald 1995-5-24 6766 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 5.0 mi e of Amedee Rd. at Wendel. On flat bordering the road. 1219 Comment
  JEPS69075  Eriastrum signatum W. L. Jepson 1918-8-2 7757 Lassen Beckwith Pass 1463 Comment
  SEINET14592139  Eriastrum signatum R. R. Halse 2004-7-21 6669 Lassen At junction of US Hwy 395 and State Road A 26, ca 11 miles SE of Milford. 1274 Comment
  CAS-BOT-BC515169  Eriastrum signatum John Thomas Howell 1934-6-10 11840 Lassen Near Plumas Junction 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
  JEPS116749  Eriastrum sparsiflorum David Gowen 2006-8-2 657 Lassen South of Constantia on Red Rock Rd. just east of Hwy 395. Comment
  CAS-BOT-BC286605  Ericameria bloomeri M. S. Taylor; B. Hammond 1982-8-27 5054 Lassen Crystal Peak area, Diamond Mts, ca. 6 air mi sw of Doyle 2377 Comment
  CAS-BOT-BC286607  Ericameria bloomeri Gary Schoolcraft 1984-8-21 1367 Lassen Eastern slopes of Fredonyer Mtn. 33-12-35 2072 Comment
  UC1776699  Ericameria bloomeri G. Schoolcraft 1992-8-19 2249 Lassen About 1 mile east of Devil's Corral, HWY 36 1493 Comment
  CHSC12420  Ericameria nauseosa Anne Linda Brisk 1969-6-19 3 Lassen 1/4 mi NE ELBS. 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
  JEPS21522  Ericameria nauseosa var. oreophila Joseph Grinnell 1928-7-13 Lassen Petes Valley Comment
  JEPS95709  Ericameria nauseosa var. oreophila Vernon H. Oswald and L. Ahart 1995-8-14 7181 Lassen T31N R15E NW1/4 Sec. 11, 4460 ft, Modoc Plateau, Sagebrush Scrub. Hwy. 395 9.1 mi N of Smoke Creek Ranch Rd., N of Susanville 1359 Comment
  RSA719707  Ericameria nauseosa var. oreophila Michael A. Vincent, K. Levings 2006-7-29 12921 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. 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
  CAS-BOT-BC294187  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True 1973-8-1 50217 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  UC1483819  Ericameria nauseosa var. speciosa G. Schoolcraft 1980-10-8 359 Lassen w side of Painters Flat 1716 Comment
  CHSC65294  Ericameria nauseosa var. washoensis Vernon H. Oswald; Lowell Ahart 1995-8-14 7190 A Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville. Along this section of road. 1645 Comment
  CAS-BOT-BC293011  Ericameria parryi var. nevadensis G. Schoolcraft 1992-8-19 2250 Lassen About 5 mi. west of Susanville, s. of river 1432 Comment
  CDA18267  Erigeron G. D. Barbe 1974-8-2 1931 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  POM357393  Erigeron aphanactis Christopher Davidson 1975-6-7 2753 Lassen 1 mi E of Beckwourth Pass on Hwy 70. 1524 Comment
  UCD131606  Erigeron aphanactis Jack Major 1966-6-23 s.n. Lassen just north of Hallelujah Junction (at junction of State Highway 70 and U.S. Highway 395). 1432 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-BC293524  Erigeron aphanactis var. aphanactis Mrs. H. C. Cantelow 1941-5-24 s.n. Lassen Ball's Canyon, south of Secret Valley Comment
  UCD131273  Erigeron bloomeri Beecher Crampton 1960-6-18 5723 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch; northeastern part of the county. 1981 Comment
  CHSC67463  Erigeron bloomeri var. bloomeri James D. Jokerst 1991-5-29 3315 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 rodge N of drainage. 1584 Comment
  OBI76959  Erigeron bloomeri var. bloomeri Anthony Baniaga 2011-7-6 421 Lassen Lassen Natl Forest. Near intersection of 29N02Y and the "B" spur. Fredonyer Pass quad. T29N r10E sec 23 SW of SW 1640 Comment
  RSA768025  Erigeron bloomeri var. bloomeri L. Ahart, John Dittes 2010-7-31 17010 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
  UC1136834  Erigeron bloomeri var. bloomeri George A. Fischer and Irwin H. Johnson 1933-7-12 F 217 Lassen Lassen National Forest 1722 Comment
  UC1536892  Erigeron bloomeri var. bloomeri G. H. True Jr. 1936-6-25 531 Lassen Harvey Ranger Station Harvey Valley 1706 Comment
  CAS-BOT-BC297189  Erigeron coulteri G. Schoolcraft 1994-7-6 2358 Lassen About 1 mile west of Boot Lake 2042 Comment
  CAS-BOT-BC296847  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-16 8340 Lassen Janesville Comment
  CHSC105252  Erigeron divergens Lowell Ahart; John Dittes 2010-7-31 17004 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
  CHSC66373  Erigeron divergens Vernon H. Oswald; Lowell Ahart 1996-6-17 7808 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of the Susan River E of Devils Corral Trailhead and W of the 6.0 mile post. 1402 Comment
  POM33001  Erigeron divergens Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  SEINET5708466 Image available Erigeron divergens Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7708 Lassen Along CA 139. Willow Creek.; Willow Creek 1428 Comment
  UCR67028  Erigeron divergens George K. Helmkamp 1990-9-23 G- 7 Lassen north of Ravendale 1677 Comment
  UCD131887  Erigeron eatonii var. nevadincola Grady L. Webster 1989-5-13 7719 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  POM32997  Erigeron eatonii var. plantagineus Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC1587058  Erigeron eatonii var. plantagineus G. Schoolcraft 1991-6-18 2162 Lassen along Hwy 139 4 mi w Said Valley Res. 1706 Comment
  UC1609303  Erigeron eatonii var. plantagineus Vernon H. Oswald and Lowell Ahart 1993-6-14 5515 Lassen ca 3 mi w Eagle Lake (Eagle Lake Rd. (Lassen A1) 0.5 mi sw Spaulding Tract Rd. (Rd. 518, 33N89)) 1810 Comment
  UCD131889  Erigeron eatonii var. plantagineus Jack Major 1966-6-24 s.n. Lassen Long Valley, 3 miles airline southwest of Patterson Guard Station, northeastern county. 2087 Comment
  CHSC64838  Erigeron elegantulus Vernon H. Oswald 1995-6-26 6945 Lassen Modoc Plateau. Spooner Rd. ca. 0.3-0.4 mi e of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  UC1583975  Erigeron filifolius G. Schoolcraft 1990-7-2 2102 Lassen w Cold Spring Mtn. 1645 Comment
  UC87694  Erigeron filifolius T. S. Brandegee 1892-6-26 Lassen Milford 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
  UCD131967  Erigeron glacialis var. glacialis T. I. Storer 1932-7-31 s.n. Lassen Upper King Creek Meadows, Lassen Volc. Nat'l Park. 2286 Comment
  CAS-BOT-BC295182  Erigeron inornatus John Thomas Howell 1974-7-10 50561 Lassen Elysian Valley 1325 Comment
  CHSC25547  Erigeron inornatus var. inornatus Robert A. Schlising 1974-7-19 3153 Lassen SE of Eagle Lake, about 1.1 mi from Eagle Lake Field Station. Comment
  JEPS100464  Erigeron inornatus var. inornatus Dean W. Taylor 2001-6-28 17820 Lassen Diamond Mountains, Crystal Peak, along ridgeline at the summit 2377 Comment
  RSA712920  Erigeron inornatus var. inornatus L. P. Janeway 2005-8-27 8521 Lassen High Cascade Range. Along road 22, 2.1 road km west of its beginning/end at Road 35N05 in Little Valley 1415 Comment
  UC485173  Erigeron inornatus var. inornatus T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  UC1136838  Erigeron inornatus var. inornatus L. R. Short and D. Gish 1936-8-3 S- 397 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1795 Comment
  UC584244  Erigeron lassenianus var. lassenianus G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2264 Lassen bare summit ridge and ridges sw Diamond Mt. (s of Susanville, Plumas and Lassen Counties) Comment
  CAS-BOT-BC295470  Erigeron lassenianus var. lassenianus Clarence R. Quick 1961-6-21 61 -21 Lassen Adjacent to Road 21, Blacks Mt. Experimental Forest northeast of Lassen Peak 1798 Comment
  CHSC117128  Erigeron linearis L. P. Janeway; B. Castro 2015-6-5 11776 Lassen Great Basin, Modoc Plateau. Along Tuledad Road (County Road 506) 13.0 road-km south of the junction at the west end of Tuledad Canyon; 6.8 road-km north of Stage Road (which is in the eastern corner of Madeline Plains); west side of a northeastern branch of Red Rock Creek. 1695 Comment
  RSA0049610  Erigeron linearis Dean Wm. Taylor 2012-6-7 21231 Lassen Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139 1635 Comment
  HSC63770  Erigeron linearis Teresa Prendusi 1980-5-20 Lassen Snowstorm Mtn. along spring area and 4 mi. W of Hwy. 395 1524 Comment
  SD9017  Erigeron nivalis Mrs. R. M. Austin 1882-8-10 Lassen Lassen Peak Comment
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Apr 29 2013
  CHSC12615  Erigeron philadelphicus Jannae Pitts 1972-6-23 265 Lassen On the road to Eagle Lake Field Station, 2 mi se of the station on the e side of the road. Comment
  HSC82189  Erigeron philadelphicus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6038 Lassen Along Ash Creek at Ash Creek Campground 1494 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
  POM261457  Erigeron pumilus subsp. intermedius Alice Eastwood, John Thomas Howell 1940-6-15 8312 Lassen Upper Willow Creek east of Hayden Hill Comment
  CAS-BOT-BC300122  Erigeron pumilus var. intermedius Alice Eastwood; John Thomas Howell 1940-6-15 8312 Lassen Upper Willow Creek east of Hayden Hill Comment
  CHSC71222  Erigeron pumilus var. intermedius Vernon H. Oswald; Lowell Ahart 1998-6-4 9139 Lassen Red Rock Rd at its junction with Hwy. 395 south of Constantia. 1365 Comment
  CHSC86949  Erigeron pumilus var. intermedius L. P. Janeway 2001-6-19 7187 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
  CHSC89730  Erigeron pumilus var. intermedius L. P. Janeway 2004-6-26 8163 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  CHSC93688  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
  CAS-BOT-BC255400  Eriogonum Mike Vasey 1990-6-30 9061 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Raod, Modoc National Forest 1500 Comment
  CAS-BOT-BC241565  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-5 4672 Lassen Between Shaffer Mt. and Warren Peak Comment
  NY243326  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-1 4649 Lassen Johnstonville. Comment
  UC762657  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-5 4672 Lassen Pass between Shaffer Mt. and Warren Peak Comment
  CAS-BOT-BC241567  Eriogonum baileyi var. baileyi John Thomas Howell; G. H. True 1973-7-31 50144 Lassen Janesville 1295 Comment
  NY242982  Eriogonum baileyi var. divaricatum R. F. Hoover 1940-10-5 4673 Lassen Pass between Shaffer Mountain and Warren Peak. Comment
  CAS-BOT-BC244039  Eriogonum baileyi var. praebens R. F. Hoover 1940-10-5 4673 Lassen Between Shaffer Mt. and Warren Peak Comment
  CAS-BOT-BC246498  Eriogonum douglasii var. meridionale H. D. Ripley; R. C. Barneby 1943-6-13 5712 Lassen South of Johnstonville 1325 Comment
  CAS-BOT-BC246500  Eriogonum douglasii var. meridionale Parkison & Party 1916-6-8 8 Lassen Lassen National Forest, Sage type, Harvey Valley 1676 Comment
  CHSC50839  Eriogonum elatum var. elatum Vernon Oswald; Lowell Ahart 1990-7-25 4399 Lassen Intersection of Hwy 70 and Scott Rd, 2.2 mi west of Hwy 395. 1463 Comment
  CAS-BOT-BC255743  Eriogonum elatum var. villosum Clare B. Hardham 1969-8-28 17459 Lassen West of Janesville, Sierra Nevada Comment
  CHSC93237  Eriogonum elatum var. villosum John Dittes; Scott Chamberlain 2004-6-28 1020 A 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-mile east of Plumas County line; near meadow edge. 1511 Comment
  SEINET210992  Eriogonum gracilipes Noel H. Holmgren, Barton L. Bethe 1970-6-25 4378 Lassen Northe end if Petersen Mountain, near U.S. 395, 8 miles north of junction with Calif. 70 (Hallelujah Junction). T 23N, R 18E. Sec 6. Comment
  CDA22616  Eriogonum maculatum T. C. Fuller 1980-8-6 20322 Lassen 0.2 km south of Smoke Creek Ranch Road, 2 km west of the state line, 28.8 km (18.6 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  UC85967  Eriogonum maculatum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  POM203841  Eriogonum marifolium J. T. Howell 1934-7-9 12521 Lassen Pine Creek Flat Comment
  CHSC84392  Eriogonum microthecum var. ambiguum Lowell Ahart 2003-8-17 10518 Lassen Small drainage, about 100 yards west of the cattle guard, on the southeast side of Smoke Creek Ranch Road, about 8-9 miles (air) northeast of Highway 395, about 30 miles (air) northeast of Susanville. 1450 Comment
  NY803460  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 2003-9-22 2948 Lassen West slopes of Fort Sage Mountains ca. 4 miles northeast of Doyle, CA - ne1/4 1696 Comment
  UCD13226  Eriogonum nudum Janet Browder 1973-6-3 98 Lassen Lassen CO. Eagle Lake recreation Area, County Road 201, 1 mile north of airport. Elevation 5100 feet. 1554 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
  SEINET523088  Eriogonum nudum var. nudum Paul Opler 2002-6-22 Lassen Lauffman, W of Milfold. Comment
  CHSC13698  Eriogonum nudum var. pubiflorum J. Wolf 1946-6-24 Lassen MeCoy Flat. Eagle Lake. 1645 Comment
  JEPS56589  Eriogonum nudum var. pubiflorum Brown and Wieslander 1922-7-23 6 Lassen Martin Sprs. Eagle Lake, Martin Sprs. Comment
  JEPS94558  Eriogonum nudum var. pubiflorum Vernon Oswald and Lowell Ahart 1997-6-24 8595 Lassen s of Susanville (on the n side of Diamond Mountain on Forest Road 29N43, 1.2 mi e of Gold Run Road (29N10)); Diamond Mountain, Forest Road 29N43 1685 Comment
  SEINET11261507  Eriogonum nudum var. pubiflorum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3925 Lassen 5.5 rd miles west of jct with Hwy 395 on Dawn Dr then rd to summit of Shaffer Mountain. Ca 16 air mi ene of downtown Susanville.; 0 1899 Comment
  SEINET14417488  Eriogonum nudum var. pubiflorum Robert L. Johnson, Mikel R. Stevens 2015-1 3925 Lassen 5.5 rd miles west of jct with Hwy 395 on Dawn Dr then rd to summit of Shaffer Mountain. Ca 16 air mi ene of downtown Susanville.; 0 1899 Comment
  UC1542952  Eriogonum nudum var. pubiflorum G. Schoolcraft 1987-9-9 1778 Lassen 3 mi n Bieber; Ash Creek Wildlife Area 1258 Comment
  UC77673  Eriogonum nudum var. scapigerum T. S. Brandegee 1892-6-27 Lassen Milford Comment
  SEINET530683  Eriogonum nummulare Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  UCR259107  Eriogonum nummulare John F. Emmel 1993-7-29 1284 Lassen Southeast Honey Lake Valley, 4.1 air miles west and 1.3 air miles south of Calneva railroad stop, c. 2 air miles north of peak of Turtle Mountain 1256 Comment
  CHSC64886  Eriogonum ovalifolium var. ovalifolium Vernon H. Oswald; Lowell Ahart 1995-6-19 6889 Lassen Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 1.7 mi e of Hwy. 395. On a slope on the s side of the road at Mud Flat. 1350 Comment
  HSC63563  Eriogonum prociduum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6004 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  RSA59736  Eriogonum prociduum E. K. Balls 1950-5-19 14780 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
  UC1483820  Eriogonum prociduum G. Schoolcraft 1980-7-14 308 Lassen w Madeline (Ash Valley); Ash Valley 1548 Comment
  CAS-BOT-BC272625  Eriogonum spergulinum var. reddingianum John Thomas Howell 1934-6-14 12123 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CHSC45490  Eriogonum spergulinum var. reddingianum Lowell Ahart; John Thomas Howell 1974-7-9 516 Lassen Along the edge of Eagle Lake. 1584 Comment
  UC303059  Eriogonum spergulinum var. reddingianum Pearl Safford Lassen Susanville [uncertain locality] Comment
  CHSC25314  Eriogonum sphaerocephalum var. halimioides Pauleen Broyles 1977-6-1 165 Lassen Spencer Basin, 8 km n of Herlong. 1770 Comment
  CHSC57304  Eriogonum sphaerocephalum var. halimioides Mary Meyer 1980-7-9 Lassen One mile northwest of Horse Camp Spring. Meadow. 1706 Comment
  CHSC71393  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald 1998-7-6 9246 Lassen Shugru Reservoir in Bass Hill WA on Hwy. 395 between Susanville and Janesville, 2.7 mi southeast of Hwy. 36. Roadside flat. 1243 Comment
  CHSC86947  Eriogonum sphaerocephalum var. halimioides L. P. Janeway 2001-6-20 7190 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
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  CHSC13455  Eriogonum strictum var. anserinum J. Pitts 1972-6-22 248 Lassen 70 yds. n of Eagle Lake Biology Station. Comment
  JEPS56423  Eriogonum strictum var. anserinum Dr. Longbridge 1912-1 Lassen e Amedee Comment
  CAS-BOT-BC267885  Eriogonum umbellatum Marcus E. Jones 1897-6-26 s.n. Lassen Perkin's Ranch, Susanville 1463 Comment
  SBBG64170  Eriogonum umbellatum D. Crofton-Atkins 1931-6-7 Lassen Susanville 1310 Comment
  CAS-BOT-BC267887  Eriogonum umbellatum Clarence R. Quick 1962-8-3 62 -89 Lassen Delasmutt Ranch, Hw. 44, nr. Susanville-Old Station, along dirt road to Blacks Mt. E.F. Hdqtrs. 1615 Comment
  CHSC23499  Eriogonum umbellatum var. modocense Wayne O. Baum 1971-7-9 71 -81 Lassen N. slope of Gallatin Peak. 2072 Comment
  CHSC30618  Eriogonum umbellatum var. modocense Eric Miller 1975-7-8 7 Lassen N. E. slope of Gallatin Peak. 2011 Comment
  CHSC99123  Eriogonum umbellatum var. modocense Lowell Ahart; John Dittes 2008-6-19 14882 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
  HSC17377  Eriogonum umbellatum var. modocense M. T. Milligan 1964-7-17 144 Lassen 3.5 mi. W of Eagle Lake Rd. on Marrill Flat Rd. 1677 Comment
  RSA152682  Eriogonum umbellatum var. modocense I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16361 Lassen On ridge among volcanic boulders near NE end of Eagle Lake. Comment
  CHSC71131  Eriogonum umbellatum var. nevadense Vernon H. Oswald; Lowell Ahart 1998-5-22 9115 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
  RSA65960  Eriogonum umbellatum var. nevadense F. W. Peirson 1926-6-24 6848 Lassen On Madeline Plain. 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
  UC773862  Eriogonum umbellatum var. nevadense L. R. Short and J. Warren 1936-6-12 S- 432 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1804 Comment
  UCR208066  Eriogonum umbellatum var. polyanthum L. P. Janeway 2004-6-26 8157 Lassen High Cascade Range, about 1.3 km WSW of Patterson Flat, at junction of roads 35N08 and 35N20, in Blacks Mountain Experimental Forest 1750 Comment
  CHSC61233  Eriogonum vimineum P. V. Caldwell 1972-6-17 227 Lassen Eagle Lake B. Station. Outside and around Tom Rodgers Hall. Comment
  JEPS56156  Eriogonum vimineum W. L. Jepson 1918-8-5 7816 Lassen Madelin Plains 1615 Comment
  JEPS97409  Eriogonum vimineum Vernon H. Oswald and L. Ahart 1995-6-19 6882 Lassen T30N R15E NE1/4 SE1/4 Sect. 22, 4500 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395 1371 Comment
  NY399826  Eriogonum vimineum G. Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade road west of Doyle Creek 1585.0 Comment
  RSA780043  Eriogonum vimineum Elizabeth A. Kempton 2007-8-15 511 Lassen Janesville, intersection of 395 and Sunnyside road 973 Comment
  SEINET10299456  Eriogonum vimineum Gary Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade Road west of Doyle Creek 1585 Comment
  SEINET14417545  Eriogonum vimineum Robert L. Johnson, Mikel R. Stevens 2015-1 3924 Lassen 1.9 rd miles west of jct with Hwy 395 on Dawn Dr on E side of Shaffer Mountain. Ca 18 air mi ene of downtown Susanville.; South to southwest-facing slope. 1545 Comment
  UC1587101  Eriogonum vimineum G. Schoolcraft 1991-7-31 2202 Lassen along Karlo Road about 1/2 mi e Hwy. 395 1356 Comment
  UC6518  Eriogonum vimineum M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  POM260787  Eriogonum vimineum Alice Eastwood, John T. Howell 1940-6-16 8343 Lassen Janesville. Comment
  SD51226  Eriogonum vimineum D. F. Howe 1960-9-21 2994 Lassen 2 miles north of Janesville on #395 1280 Comment
  CHSC67057  Eriophyllum lanatum Willis Ball 1969-6-19 9 Lassen Found approx. 1/2 mile N. of E.L.B.S. Near old Eagle Lake basin. 1584 Comment
  HSC81546  Eriophyllum lanatum Thomas W. Nelson, Jane P. Nelson 1980-7-6 5997 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  UC1136993  Eriophyllum lanatum var. integrifolium George A. Fischer and Irwin H. Johnson 1935-7-21 F 200 Lassen Grass Valley Lassen National Forest 1697 Comment
  SEINET8673719  Eryngium alismifolium Unknown 1958-7-22 5012 Lassen next to Highway 395 , 4.5 miles south of Ravendale Comment
  CDA38324  Eryngium articulatum Wheeler 1953-9-22 s.n. Lassen [no additional info] 0 Comment
  CAS-BOT-BC54588  Erysimum capitatum Al Simontacchi 1940-6-15 868 Lassen Lassen Forest. 0.6 miles west southwest of Black Mountains. 2133 Comment
  CAS-BOT-BC54956  Erysimum perenne Louella Bass 1973-4-30 EV 34 Lassen Elysian Valley. 1325 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
  CHSC12460  Erythranthe guttata Robert W. Severin 1969-6-26 32 Lassen Murrer's Meadow, west side in moist grassy soil next to irrigation ditch; 2 mi ese E.L.B.S. Comment
  RSA0049634  Erythranthe inflatula Dean Wm. Taylor 2012-6-6 21224 Lassen Moll Reservoir (ca.10 air miles E of Adin), west side of the reservoir 1603 Comment
  CHSC14065  Erythranthe primuloides J. Grove 1973-7-25 Lassen Collected at Collemans Lake along fill dam of lake. 1524 Comment
  CHSC71102  Erythranthe suksdorfii Vernon H. Oswald; Lowell Ahart 1998-5-22 9123 Lassen Road to Summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  SEINET10933162  Erythronium purpurascens Hall 1993-6-29 Hall 4294 Lassen Plants of Mount Lassen. Soupen Springs. 8000 feet. 2440 Comment
  NY500075  Eschscholzia W. W. Eggleston 1911-5-29 6752 Lassen Vicinity of Doyle Station 1290 Comment
  JEPS127177  Eschscholzia californica subsp. californica Lowell Ahart, John Dittes 2016-7-15 21228 Lassen In Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UCD39131  Euphorbia crenulata Beecher Crampton 1964-6-25 7072 Lassen 25 miles n.w. Susanville State Hwy. 44, Bogard Ranger Station, Lassen National Forest. 1722 Comment
  CDA35317  Euphorbia crenulata T. C. Fuller 1962-6-13 8997 a Lassen 0.5 mile south of Highway 36 to Chester, 2 miles west of Westwood. 0 Comment
  UCD142769  Euphorbia serpillifolia R. N. Raynor 1938-7-16 s.n. Lassen Honey Lake Valley. Comment
  UC1533119  Euphorbia spathulata G. Schoolcraft 1986-6-18 1629 Lassen 3.5 mi e Hwy. 195 (on road to Hall Sp.) 1463 Comment
  JEPS127347  Euphorbia virgata Lowell Ahart, John Dittes 2016-7-13 21118 Lassen 150 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CAS-BOT-BC278430  Festuca idahoensis John Thomas Howell 1934-7-8 12496 Lassen Spalding's, Eagle Lake Comment
  GMDRC6957  Festuca idahoensis J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31434 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  JEPS127716  Festuca idahoensis Alejandro Brambila, Michael Dolan 2016-7-25 CA 320 -171 Lassen Clarks Valley Road west off 395 right after Likely Mtn. About 1Mile before Christensen Corral Comment
  CAS-BOT-BC278433  Festuca idahoensis Clarence R. Quick 1962-6-17 62 -30 Lassen Western Pacific RR., S. of Halls Flat, Susanville-Pittville road near Blacks Mt. Experimental Station 1706 Comment
  CAS-BOT-BC278932  Festuca rubra John Thomas Howell 1934-7-6 12458 Lassen Harvey Valley Comment
  UCD66348  Festuca rubra L. Whitney 1933-8-3 Lassen Slate Creek. 1920 Comment
  JEPS19565  Floerkea proserpinacoides Milo S. Baker and F. P. Nutting 1894-6-15 Lassen Meadow in the Big Valley Mountains situated nw of Big Valley in which Bieber and Nubieber are located, northwestern Lassen County Big Valley; Big Valley Mountains Comment
  UC963893  Floerkea proserpinacoides Milo S. Baker 1952-5-23 12421 b Lassen e of Chester (along Highway 36); Highway 36 Comment
  UCR18732  Frasera albicaulis Frank C. Vasek 1975-7-11 750711- 05 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  POM128264  Frasera albicaulis var. modocensis Franklin P. Nutting s.n. Lassen South side of Dixiy [or Dixey] Mountains. Comment
  UC1134589  Fritillaria atropurpurea K. E. Bradshaw 1939-3-27 232 Lassen s end of Black Mountain Experimental Forest, Lassen National Forest Black Mountain Experimental Forest; Lassen National Forest, Black Mountain Experimental Forest 1752 Comment
  POM109748  Fritillaria atropurpurea Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  POM109791  Fritillaria pudica Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  JEPS4950  Fritillaria pudica Louise Scroggy 1918-3-24 Lassen 1/4 mi above Pit River (on Dixie Valley Road, 2 mi above Rocky Comfort School House in nw corner of Lassen Co., 15 mi n of boundary line); Dixie Valley Road Comment
  CAS-BOT-BC508129  Fritillaria recurva Mrs. A S. Baldwin 1928-5-10 318 Lassen Coyote Flat. Over ridge from Dixie Valley Comment
  CHSC117191  Galium aparine Lowell Ahart; John Dittes 2016-6-7 21020 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  HSC75888  Galium aparine D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19278 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  JEPS127170  Galium aparine Lowell Ahart, John Dittes 2016-7-15 21223 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  RSA121073  Galium bifolium L. R. Short, W. Gansberg 1936-6-2 S- 368 Lassen Lassen forest. MDM. 1851 Comment
  UC1523737  Galium bolanderi Lisa Ganio 1981-6-17 24 Lassen Beaver Creek 1280 Comment
  POM203777  Galium bolanderi J. T. Howell 1934-7-3 12381 Lassen Near Dry Lake. Mtns. SE of Bieber. Comment
  RSA716143  Galium boreale subsp. septentrionale L. Ahart, John Dittes 2005-6-2 11981 Lassen N side of a poor dirt road. Long Valley. About 4.5 miles (air) NE of the intersection of Scott Road and Hwy 70. 5.7 miles (air) NW of Hallelujah Jct. 1411 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
  CDA42206  Galium trifidum Gordon Leppig and T. LaBanca 1997-6-29 540 Lassen Blue Lake Ranch; Modoc National Forest. Comment
  RSA0105575  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
  CHSC36176  Gayophytum diffusum Jerry Snodgrass 1978-6-28 1 Lassen Lower Dry Lakes e of Eagle Lake. 1645 Comment
  JEPS128407  Gayophytum diffusum Catherine Bauer with Ellen Bauer Benson 2017-8-16 15 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. 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
  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
  POM38702  Gayophytum helleri var. glabrum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  JEPS117576  Gayophytum heterozygum Lowell Ahart, John Dittes 2010-7-31 17025 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  RSA768780  Gayophytum heterozygum L. Ahart, John Dittes 2010-7-31 17025 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1521 Comment
  UC1122567  Gayophytum heterozygum H. P. Hagge 1929-9-12 26 Lassen Logan Mtn. Eagle Lake Quadrangle Comment
  UC773934  Gayophytum humile L. R. Short and J. Warren 1936-6-23 S- 450 Lassen Burgess Spring Experiment Range Lassen National Forest 1761 Comment
  SEINET10491752  Gayophytum ramosissimum Paul Gallian, David B. Dunn 1971-6-2 Gallian 468 Lassen 6 mi n of hallelujah jct on us hwy 395 in artemisia tridenta, pinyon pine, jeffery pine along high ridge and in sandy wash. 1402 Comment
  JEPS88543  Gentiana calycosa Vernon H. Oswald and Lowell Ahart 1996-8-1 8119 Lassen Forest Rd, 28N56 (D-Line) ca. 2 mi N of Cyer Mtn. Lookout SSW of Westwood 1737 Comment
  UC878530  Gentiana newberryi A. A. Heller 1937-9-1 15341 Lassen about a mi e Westwood 1524 Comment
  UC803944  Gentiana newberryi G. L. Stebbins Jr., P. Dansereau, C. McMillan, and K. Narayan 1949-8-6 3998 Lassen nw of Susanville; Hog Flat 1676 Comment
  POM88686  Geranium pusillum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA0029585  Geranium viscosissimum var. nervosum Bruce Bartholomew, B. Anderson 1988-6-25 4372 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  RSA454467  Geum canescens Roch Well 1923-7-1 s.n. Lassen 12 miles from Eagle Lake Comment
  POM161476  Geum macrophyllum Franklin Nutting 1894-7-12 s.n. Lassen Pine Creek. Comment
  SEINET6702766  Geum macrophyllum var. perincisum G. Schoolcraft 1994-8-2 2393 Lassen About 2 miles northwest of Boot Lake 2438 Comment
  JEPS94554  Geum triflorum Vernon Oswald and Lowell Ahart 1997-6-24 8649 Lassen s of Susanville (at the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC773877  Geum triflorum L. R. Short, J. Warren 1936-6-23 S 423 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1764 Comment
  RSA91873  Geum triflorum var. ciliatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  SD107308  Gilia Christopher Davidson 1975-6-7 2756 Lassen 1.0 mile east of Beckwourth Pass on Highway 70. 1524 Comment
  UCD117610  Gilia brecciarum Grady L. Webster 1989-5-13 7707 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  SEINET14625061  Gilia brecciarum subsp. brecciarum M. J. Williams, A. Tiehm 1978-5-14 78- 48 -1 Lassen Hwy 395, 2.8 miles S of Red Rock road turn-off. 1372 Comment
  UC1776672  Gilia capillaris G. Schoolcraft 1993-6-19 2299 Lassen Ash Valley RNA/ACEC 1554 Comment
  SEINET14644501  Gilia inconspicua F. L. H. 1915-5-28 s.n. Lassen Honey Lake. Comment
  UC1093640  Gilia inconspicua Herbert L. Mason 1957-7-5 14716 Lassen town s Madeline (Madeline Plains); Madeline Plains (town s of Madeline) Comment
  NY964494  Gilia inconspicua var. sinuata W. W. Eggleston 1911-5-20 6743 Lassen Vicinity of Doyle Station 1290 Comment
  CHSC7766  Gilia modocensis Beverley J. Wise 1969-5-18 76 Lassen 16.8 mi. East of Susanville on Las. Co. Rd 216 off Las. Co. Rd. 215. 1371 Comment
  CAS-BOT-BC523868  Gilia modocensis Alice Eastwood; John Thomas Howell 1940-6-16 8355 Lassen Constantia Comment
  POM74852  Gilia sinuata Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  RSA469630  Gilia sinuata Christopher Davidson 1975-6-7 2756 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UC52852  Gilia sinuata J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amadee , Amadee (Amedee?) (Honey Lake Valley) Comment
  JEPS28295  Glyceria borealis George W. Gillett 1957-7-26 922 Lassen Lassen Volcanic Nat'l Park, Butte Lake 1844 Comment
  UCD66755  Glyceria borealis H. S. Yates 1936-8-11 6066 Lassen Baxter Creek. 1280 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
  UC1536868  Gnaphalium palustre G. H. True Jr. 1938-7-14 956 Lassen near Janesville 1280 Comment
  CAS-BOT-BC302591  Gnaphalium palustre John Thomas Howell 1959-9-23 s.n. Lassen Lassen Volcanic National Park. Beach at se. end of Juniper Lake 2057 Comment
  CHSC60414  Gratiola ebracteata Mary Ann Showers 1992-6-13 2543 Lassen Shoreline at western end of Widow Lake. Lassen Volcania National Park. 2072 Comment
  CHSC36443  Grayia spinosa Theresa Costa 1982-6-2 24 Lassen Along Ravendale Rd ca. 10 yd e of Horse Lake. Comment
  OBI77052  Grayia spinosa Anthony Baniaga 2011-7-1 411 Lassen Ownership unk. E of Doyle, alongrd to Fort Sage Mts. 1288 Comment
  JEPS124632 Image available Grindelia nana Himayat H. Naqvi 1965-7-13 164 Lassen Near pit river overflow number 7-05. Comment
  CAS-BOT-BC304680  Grindelia squarrosa Margaret Williams 1974-8-4 74 -L-84 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CDA3425  Gypsophila paniculata T. C. Fuller 1963-7-16 10923 Lassen North of the cemetery, Janesville. 0 Comment
  CDA36783  Gypsophila paniculata D. B. Joley 1976-6-22 1 Lassen Janesville. 0 Comment
  CHSC98245  Hackelia cusickii Allison Sanger 2003-6-25 Lassen Near Road 33N13 in Halls Flat, approximately 8 air miles east-northeast of Old Station. 1706 Comment
  POM72793  Hackelia micrantha Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1602195  Halogeton glomeratus Pryer and Fix 1948-8-17 Lassen Herlong Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  UCD98896  Halogeton glomeratus Collector Unknown 1950-9-1 s.n. Lassen vicinity of Herlong. Comment
  UCD98898  Halogeton glomeratus Roy V. Parker; M. Ingle, G. Randall 1955-8-29 s.n. Lassen About 6 miles east of Amedee (northern fringe of Sierra Ordnance depot). 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
  RSA518564  Helianthus annuus George K. Helmkamp 1990-9-23 A- 11 Lassen 3 mi E of Susanville, along state road 36. 1345 Comment
  CHSC71860  Helianthus bolanderi Vernon H. Oswald; Lowell Ahart 1998-9-8 9572 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. Roadside. 1255 Comment
  JEPS94088  Helianthus bolanderi Vernon H. Oswald and Lowell Ahart 1998-9-8 9572 Lassen Hwy. 299 at R.R. overpass on e. side of Nubieber 1255 Comment
  CAS-BOT-BC305662  Helianthus cusickii David D. Keck; J. Clausen 1935-6-24 3739 Lassen 2 mi. S. of Ravendale 1464 Comment
  GMDRC7736  Helianthus cusickii J. M. Andre, G. Clifton 1993-6-1 33413 Lassen Modoc Plateau: along US Hwy 395 at Viewland, approx 8 mi. ENE of Litchfield, 20 mi. NE of Susanville, east side of Shaffer Mtn 1399 Comment
  RSA17683  Helianthus cusickii Elmer I. Applegate 1934-5-4 8927 Lassen South end of Secret Valley Comment
  SEINET8734813 Image available Hemizonia pungens subsp. pungens Unknown 1983-1 83- 155 -1 Lassen 5 mi E of Hwy 395 on A-3 which joins the road to Alturas 1372 Comment
  SEINET5499822  Hesperochiron pumilus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  CHSC117516  Hesperolinon micranthum Lowell Ahart; John Dittes 2016-7-13 21123 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
  HSC68915  Hesperolinon micranthum Gary Schoolcraft 1980-7-10 302 Lassen Along Hwy. 139 just N of turn off to Eagle Lake campground. 1585 Comment
  UC73894  Heterotheca villosa var. minor J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Long Valley; Honey Lake Valley Comment
  CAS-BOT-BC312418  Hieracium albiflorum John Thomas Howell; Gordon H. True 1973-8-1 50220 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  CAS-BOT-BC312420  Hieracium albiflorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49448 Lassen Elysian Valley, west of Janesville, Sierra Nevada 1325 Comment
  UC32790  Hieracium horridum M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  JEPS103187  Hieracium scouleri G. Schoolcraft 2000-7-5 2911 Lassen On slopes of Shinn Mountain 2011 Comment
  CHSC65298  Hieracium scouleri var. scouleri Vernon H. Oswald 1995-8-21 7206 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. On the W side of the lake. 1859 Comment
  HSC13458  Hippuris vulgaris Fred J. Kindel 1955-6-27 Lassen Mt. Meadows Reservoir. Comment
  UCD84898  Holcus lanatus John Thomas Howell; Gordon H. True, M. Williams 1973-6-28 49501 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CHSC99281  Holosteum umbellatum subsp. umbellatum Lowell Ahart; John Dittes 2008-6-20 14922 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
  UCD85278  Hordeum brachyantherum A. A. Beetle 1941-6-28 2818 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UC1142939  Hordeum brachyantherum subsp. brachyantherum A. L. Hormay 1941-6-23 17 Lassen Burgess Spring Lassen National Forest, Burgess Spring 1676 Comment
  UC1136934  Hordeum brachyantherum subsp. californicum George A. Fischer and Irwin H. Johnson 1933-7-12 F 232 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1737 Comment
  JEPS28711  Horkelia fusca subsp. tenella George W. Gillett 1957-7-29 942 Lassen 1/4 mi above Butte Lake (Along trail between Butte Lake and Snag Lake); Lassen Volcanic National Park 1859 Comment
  UC1609471  Horkelia fusca subsp. tenella Vernon H. Oswald and Lowell Ahart 1993-6-28 5577 Lassen 0.2 mi n Hwy 44 (Harvey Valley Rd (33N02), e side of Grays Valley, e of Poison Lake); e of Poison Lake, e side of Grays Valley 1749 Comment
  JEPS74735  Horkelia tridentata subsp. flavescens G. S. Crew and C. S. Robinson 1927-6-25 24 Lassen near Wetwood Junction; Lassen Forest, Norval Flat 1442 Comment
  CAS-BOT-BC213001  Hosackia crassifolia H. D. Ripley; R. C. Barneby 1943-6-14 5438 Lassen Volcanic hillskide, in open pine woods, Susanville 1402 Comment
  UC1951069  Hydrophyllum capitatum var. alpinum Debra Valov 2009-4-27 2009023 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 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
  UC124652  Hypericum formosum var. scouleri W. E. Bryant Lassen Comment
  CHSC7179  Idahoa scapigera Lynn R. Thomas 1969-4-17 101 Lassen E edge of Rice Canyon Rd., 4 mi. n of junction with 'back road to Litchfield;' ca. 12 mi e of Susanville. 1310 Comment
  CAS-BOT-BC88640  Idahoa scapigera G. Schoolcraft 1995-4-19 2465 Lassen Southwest of Susanville at west side of Susan Hills. 1341 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
  SDSU7494  Iliamna bakeri D. F. Howe 1964-8-2 3924 Lassen Hillside above Parsnip Creek, Warner Mts., Modoc National Forest 1829 Comment
  UCD126378  Iliamna bakeri Richard R. Halse 2004-7-8 6615 Lassen Along State Highway 139, around 6 miles north of Eagle Lake. 1710 Comment
  CHSC23502  Ipomopsis aggregata subsp. formosissima Wayne O. Baum 1970-6-30 70 -1 Lassen E. slope of Gallatin Peak. 1981 Comment
  GMDRC6447  Ipomopsis congesta subsp. congesta J. M. Andre, Glenn Clifton 1993-6-14 30000 Lassen northeast base of Shaffer Mtn near Secret Creek, about 20 miles ENE of Susanville 1646 Comment
  JEPS94604  Ipomopsis congesta subsp. congesta Vernon H. Oswald and Lowell Ahart 1997-5-27 8493 Lassen w side of Hwy 139 s Willow Creek Guard Station (0.9 mi s of Forest Rd. 38N04 to Coyote Flat) 1577 Comment
  CHSC36493  Iris missouriensis Theresa Costa 1982-6-4 33 Lassen Ca. 3/4mi n Murrer's Upper Meadow. Comment
  CHSC4265  Iris missouriensis K. R. Stern 1967-6-24 2425 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  SD7212  Iris missouriensis R. M. Austin 1879-1 Lassen Eagle Lake. Comment
  UC1134718  Iris missouriensis Robert W. Gardner 1937-6-16 G- 17 Lassen Burgess Spring; Halls Flat Quad. 1699 Comment
  UC1192315  Iris missouriensis Herbert L. Mason 1949-5-30 Lassen ne of Burney Falls 1524 Comment
  CHSC66711  Isoetes howellii Vernon H. Oswald; Lowell Ahart 1996-8-1 8111 Lassen Mountain Meadows Reservoir SW of Westwood. NE of Indian Ole Dam. 1539 Comment
  UC2062876  Isoetes nuttallii Forrest Freund 2016-5-18 257 Lassen Hog flat reservoir. Comment
  CAS-BOT-BC324779  Iva axillaris M. S. Taylor 1982-8-19 5022 Lassen E side of Highway 395 ca. 4 miles north of its junction with Highway 70 at Hallalujah Junction 1493 Comment
  CHSC64866  Iva axillaris subsp. robustior Vernon H. Oswald; Lowell Ahart 1995-6-19 6886 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.9 mi e of Hwy. 395, on the down-slope approaching Mud Flat. 1353 Comment
  JEPS41099  Iva axillaris subsp. robustior W. L. Jepson 1918-8-2 7787 Lassen Long Valley 1371 Comment
  CDA20368  Iva axillaris var. robustior D. Tillotson 1942-6-9 s.n. Lassen Modoc Plateau; Mud Flat. 0 Comment
  CAS-BOT-BC123376  Ivesia paniculata T. W. Nelson; J. P. Nelson 1980-7-6 5984 Lassen Ash Valley along Adin-Madeline Rd. 16 miles E of Adin. 1554 Comment
  NY436061  Ivesia paniculata T. W. Nelson 1980-7-6 5984 Lassen Ash Valley along Adin-Madeline Rd., 16 miles E of Adin. 1554.5 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
  SEINET6792604  Ivesia paniculata M. J. Williams 1970-7-4 595 Lassen Near Ash Creek. 1280 Comment
  CAS-BOT-BC109934  Juncus John Thomas Howell 1976-7-19 51971 Lassen Sierra Nevada. On Gold Creek southwest of Susanville. 1386 Comment
  CHSC5267  Juncus balticus 1944-6-26 Lassen Eagle Lake. 1584 Comment
  UC1100949  Juncus balticus Verne Grant and Irving Schneider 1947-7-31 8211 Lassen ne quarter of George Williams section 19 Madeline Plain Comment
  UC1100958  Juncus balticus Herbert L. Mason and Verne Grant 1947-7-9 13297 Lassen 5 mi e Bieber Comment
  CHSC112771  Juncus balticus subsp. ater Lowell Ahart; John Dittes 2013-7-23 18903 Lassen 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
  GMDRC7742  Juncus balticus subsp. ater J. M. Andre, G. Clifton 1993-6-11 33423 Lassen Modoc Plateau: NW of Snowstorm Mtn, approx. 3 mi. east of Horse Lake, 12 mi. S of Ravendale 1545 Comment
  JEPS88220  Juncus brachyphyllus Vernon H. Oswald and Lowell Ahart 1996-6-17 7805 Lassen n side og Bizz Johnson Trail between Devils Corral Trailhead and 6.0 milepost (trailhead off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 Comment
  UC1107336  Juncus bufonius var. occidentalis Jean Langenheim 1957-6-22 4364 Lassen near Eagle Lake edge; Eagle Lake Comment
  RSA129757  Juncus confusus L. R. Short, J. Warren 1936-6-10 S- 418 Lassen MDM, Burgess Spr. Exp. Range. 1857 Comment
  UC1601859  Juncus ensifolius Baker and Nutting 1894-7-24 Lassen Eagle Lake Comment
  CHSC117203  Juncus hemiendytus var. hemiendytus Lowell Ahart; John Dittes 2016-6-7 20991 Lassen West edge of pond, 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
  JEPS94376  Juncus hemiendytus var. hemiendytus Vernon Oswald and Lowell Ahart 1997-6-24 8653 Lassen s of Susanville (just s of the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  RSA325011  Juncus luciensis A. Tiehm, Jan Nachlinger 1984-6-25 8824 Lassen Rodeo Flat, 2.7 miles west of the state line on Buckhorn road from Ravendale to Hwy 81 1829 Comment
  CDA33210  Juncus macrandrus T. C. Fuller 1959-7-6 5018 Lassen Hwy. 36, about 1 mi. north of Westwood. (Probably in Sec. 4 or Sec. 5) 0 Comment
  POM111108  Juncus mexicanus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  CDA33205  Juncus nevadensis Gordon Leppig 1998-6-12 933 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  CHSC67714  Juncus nevadensis James D. Jokerst 1983-7-25 1899 Lassen Madeline Plains W of Termo. Comment
  UC1133741  Juncus nevadensis A. Simontacchi 1940-6-7 894 Lassen 6.4 mi sse Beaver Spring; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1601784  Juncus nevadensis Baker and Nutting 1894-7-3 Lassen Dixie Creek Comment
  UC1601833  Juncus parryi M. S. Baker and Frank Nutting 1894-7-30 Lassen Silve Lake Silver Lake Comment
  CHSC92739  Juncus trilocularis L. P. Janeway 2005-7-3 8456 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
  RSA699964  Juncus trilocularis 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
  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
  CHSC117193  Juncus uncialis Lowell Ahart; John Dittes 2016-6-7 20990 Lassen 50 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
  CHSC3494  Juniperus californica Roger Jaegel 1966-5-14 152 Lassen Located twenty-two miles north of Susanville, along the bank of Eagle Lake at C. S. C. Biological Station. Comment
  CHSC5037  Juniperus occidentalis L. B. Barlow 1967-7-16 131 Lassen Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  UC1136938  Juniperus occidentalis L. R. Short 1936-9-30 S- 508 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1828 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
  SEINET5334961  Juniperus occidentalis J. Vetter 1956-4-27 s.n. Lassen About 2 miles north of Susanville 1524 Comment
  SEINET5334982  Juniperus occidentalis W. Priest 1956-4-22 s.n. Lassen about 2 miles north of Susanville 1524 Comment
  UCR4282  Juniperus occidentalis var. australis Frank C. Vasek 1965-8-31 650831- 06 Lassen 3.8 mi west of the Ranger Station at Susanville Comment
  CAS-BOT-BC81288  Juniperus osteosperma John Thomas Howell 1924-8-13 640 Lassen Near Doyle Comment
  NY20362  Juniperus osteosperma N. H. Holmgren 1970-7-28 4625 Lassen This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  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
  SEINET5335014  Juniperus osteosperma P. A. Lehenbauer 1937-10-24 s.n. Lassen east & south of Hallelujah Sta. 20 miles N of Reno Comment
  CHSC60920  Kelloggia galioides Vernon H. Oswald; Lowell Ahart 1993-7-8 5657 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CHSC6262  Kelloggia galioides W. Vinyard 1946-6-17 Lassen Eagle Lake. Mt. Fredonyer. 2133 Comment
  CHSC65119  Kelloggia galioides Vernon H. Oswald; Lowell Ahart 1995-7-24 7133 Lassen N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just S of Pine Creek. 1950 Comment
  UCR244048  Kochia americana Jim Andre 1993-6-1 19718 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  UC1132160  Koeleria macrantha A. Simontacchi 1940-7-8 945 Lassen 5.2 mi s Jelly Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC271329  Koeleria pyramidata Clarence Quick 1963-7-12 63 -32 Lassen Blacks Mountain Experimental Forest east of Halls Flat 1859 Comment
  JEPS88425  Kyhosia bolanderi Vernon H. Oswald and Lowell Ahart 1996-8-1 8116 Lassen ca. 0.1 mi downstream Indian Ole Dam on Mountain Meadows Reservoir (sw of Westwood); Hamilton Branch of the North Fork of the Feather River 1524 Comment
  JEPS94084  Lactuca saligna Vernon H. Oswald and Lowell Ahart 1998-9-8 9574 Lassen Hwy. 299 at the R.R. overpass on e. side of Nubieber (near the hwy.) 1255 Comment
  CHSC5214  Lactuca tatarica subsp. pulchella 1944-8-11 Lassen Eagle Lake. 1584 Comment
  CDA7521  Lactuca tatarica subsp. pulchella Lee Wheeler 1964-7-15 Lassen Around railroad station, Litchfield. 0 Comment
  JEPS88243  Lagophylla ramosissima Vernon H. Oswald and Lowell Ahart 1996-6-17 7782 Lassen ca. 7 mi w Susanville (along Bizz Johnson Trail at 7 mile post on n side of Hwy 36 between trail and highway bridges spanning Susan River); Modoc Plateau 1432 Comment
  CAS-BOT-BC341482  Lagophylla ramosissima David D. Keck; J. Clausen 1935-6-25 3760 Lassen Susanville, on yellow-pine covered hills just W. of town 1300 Comment
  CHSC99304  Lamium amplexicaule Lowell Ahart; John Dittes 2008-6-20 14962 Lassen In meadow, about 30 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
  RSA0036999  Lamium amplexicaule Lowell A. Ahart, John Dittes 2008-6-20 14962 Lassen About 30 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
  CHSC99279  Lasthenia glaberrima Lowell Ahart; John Dittes 2008-6-20 14901 Lassen Sides of a vernal pool, about 100 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
  JEPS120809  Lasthenia glaberrima Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18739 Lassen Near a drainage filled with dirt from construction of a pond, about 100 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley Comment
  CAS-BOT-BC352940  Lasthenia glaberrima Wm. Anderson 1960-6-6 s.n. Lassen Barrow pit along county road S. of Mapes Ranch, Henry Lake Valley Comment
  RSA0042601  Lasthenia glaberrima Lowell A. Ahart, John Dittes, Todd Sloat 2013-6-8 18739 Lassen About 100 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1268 Comment
  UC1924257  Lathyrus lanszwertii var. aridus Debra Valov 2004-5-31 2004230 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  JEPS107446  Layia glandulosa Lowell Ahart, John Dittes 2005-6-1 11889 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
  SEINET11447818 Image available Layia glandulosa M. S. Baker 1905-1 s.n. Lassen Dixey Valley Comment
  SEINET11807266  Layia glandulosa N. H. Holmgren, Holmgren, P. K. 1980-1 9506 Lassen Observation Peak, S side of mountain, 18 km (11 mi) airline distance E of Ravendale 1890 Comment
  RSA715552  Layia glandulosa subsp. glandulosa L. Ahart, John Dittes 2005-6-1 11889 Lassen On the north side of Scott Road, Long Valley, about 4.25 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1434 Comment
  CHSC99242  Lemna minuta Lowell Ahart; John Dittes 2008-6-22 15022 Lassen On shallow water, south side of the levee, about 50 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
  CHSC66278  Lemna trisulca Vernon H. Oswald; Lowell Ahart 1996-6-24 7884 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. In meadow on the E side of Papoose Creek N of the springs. 1633 Comment
  JEPS406  Lemna trisulca W. L. Jepson 1918-8-16 8001 Lassen Merrillville 1524 Comment
  CHSC48334  Lepidium campestre Vernon Oswald 1986-5-28 2046 Lassen Hwy 36, 9.8 mi e of the Plumas-Lassen County line, 2.0 mi sw of Fredonyer Pass. Along the road. 1584 Comment
  CDA42959  Lepidium chalepense L. Ahart, John Dittes, Todd Sloat 2013-6-9 18786 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. Comment
  CHSC75476  Lepidium chalepense Vernon H. Oswald; Lowell Ahart 1999-6-9 9749 Lassen Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area: on the dam of the reservoir. 1353 Comment
  JEPS114944  Lepidium chalepense Lowell Ahart, John Dittes 2008-6-20 14978 -B Lassen Where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  NY23186  Lepidium dictyotum A. Tiehm 1980-5-29 5747 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles north-northwest of Wendel 1231.4 Comment
  UC1126714  Lepidium perfoliatum A. Simontacchi 1940-6-8 829 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quad. 1706 Comment
  NY90026  Lepidium perfoliatum D. B. Dunn 1971-6-2 17749 Lassen 3 miles south of Hallelujah Junction, on US Highway 395, Junction of US 395 and California 70 Comment
  RSA172478  Leptosiphon bolanderi Franklin P. Nutting 1894-7-2 s.n. Lassen Dixey Mts. Comment
  RSA713121  Leptosiphon ciliatus L. P. Janeway, B. Castro 2005-7-10 8480 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01. 1859 Comment
  HSC25423  Leptosiphon harknessii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19252 Lassen Harvey Valley near Cone Springs Comment
  UC1553404  Leucocrinum montanum G. Schoolcraft 1988-5-11 1794 Lassen n of Said Valley Reservoir (along Hwy 139) 1676 Comment
  RSA59892  Lewisia nevadensis E. K. Balls 1950-5-19 14773 Lassen above Ash Creek Public Camp, off road from Adin to Madeline. 1646 Comment
  CHSC60763  Lewisia triphylla Vernon H. Oswald; Lowell Ahart 1993-6-3 5473 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. On the margins of a meadow. 1731 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
  UC1924193  Leymus cinereus Debra Valov 2005-8-20 2005237 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1279 Comment
  UC573939  Leymus cinereus H. S. Yates 1936-8-12 9086 Lassen McKenzie Meadow Susanville Quadrangle Comment
  RSA647531  Leymus triticoides Marion P. Harthill 1972-6-16 778 Lassen Doyle 1372 Comment
  UCD87721  Leymus triticoides R. N. Raynor 1939-6-3 s.n. Lassen Susanville. Comment
  UCD87762  Leymus triticoides L. G. Stiles 1927-6-2 s.n. Lassen Milford. Comment
  JEPS28660  Ligusticum grayi George W. Gillett 1957-7-21 870 Lassen Lassen Volcanic Nat'l Park, Cameron Meadow 1950 Comment
  UCR227639  Limosella acaulis R. F. Thorne, Larry E. DeBuhr 1975-8-22 47206 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
  CHSC99734  Limosella aquatica Lowell Ahart; John Dittes 2008-6-20 14927 Lassen Bottom of vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  JEPS3468  Limosella aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3354 Lassen Honey Lake Valley; Adobe meadows Comment
  UC1025096  Linanthus harknessii Leo Whitney 1934-5-27 1639 Lassen near Crater Lake 1828 Comment
  CHSC64802  Linanthus pungens Vernon H. Oswald 1995-5-24 6758 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. On a outcrop at the base of the Amedee Mtns. 1280 Comment
  RSA713161  Linanthus pungens L. P. Janeway, B. Castro 2005-7-10 8479 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01. 1859 Comment
  CHSC4888  Linum lewisii var. lewisii Bill Wilson 1967-7-1 7 Lassen Collected on Rd. #5.00, 2.5 mi. S of Eagle Lake Biological Station. 8 mi. N of Susanville. 1645 Comment
  CHSC108025  Lithophragma glabrum Lowell Ahart; John Dittes 2011-6-20 17488 Lassen Meadow, 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
  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
  UC773885  Lithophragma glabrum L. R. Short 1936-4-28 S- 337 Lassen Harvey Valley; Lassen National Forest, Harvey Valley 1706 Comment
  CAS-BOT-BC435430  Lithophragma glabrum Louella Bass 1975-4-15 22 Lassen Elysian Valley; Sierra Nevada 1325 Comment
  CAS-BOT-BC428416  Lithophragma tenellum Doris Kildale Gillespie 1930-5-13 9369 Lassen Between Susanville and Janesville Comment
  CHSC29956  Lithophragma tenellum Robin L. Ondricek 1978-5-25 25 Lassen 150 yds N of cafeteria at Eagle Lake Field Station. 1554 Comment
  UC1609478  Lithophragma tenellum Vernon H. Oswald and Lowell Ahart 1993-6-3 5478 Lassen Champs Flat Rd (Lassen 21/105, Forest 32N02), 3.7 mi n Hwy 44 at spur rd 32N02E (between Poison Lake and Susanville, se side of Pine Creek Valley); Pine Creek Valley, btw Poison Lake and Susanville 1731 Comment
  UC1136831  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 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
  CHSC42594  Lomatium bicolor var. leptocarpum Vernon Oswald 1986-5-28 2065 Lassen Hwy 139 between Eagle Lake and Adin, 49.0 mi n of Susanville. 1630 Comment
  CHSC66229  Lomatium bicolor var. leptocarpum Vernon H. Oswald 1996-6-24 7855 Lassen Papoose Meadows located ca.0.5 mi E of Eagel Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  UC614436  Lomatium bicolor var. leptocarpum L. Constance 1938-6-11 2327 Lassen 5 mi. s.w. Susanville 1371 Comment
  RSA339995  Lomatium macrocarpum Noel Holmgren, Patricia Holmgren 1980-7-3 9487 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  CHSC7744  Lomatium nevadense Beverley J. Wise 1969-4-13 116 Lassen 5.6 mi. east on Las. Co. Rd. 338 past the junction with Hwy 395. 1554 Comment
  UC1123083  Lomatium nevadense A. Simontacchi 1940-5-27 768 Lassen 9.3 mi NW of Crater Lake 1752 Comment
  UC1951074  Lomatium nevadense Debra Valov 2009-4-25 2009017 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  UC1483796  Lomatium nevadense var. nevadense G. Schoolcraft 1979-4-18 10 Lassen n. Skedaddle Ranch 1554 Comment
  CHSC27618  Lomatium nevadense var. parishii Robert A. Schlising 1978-6-8 3287 Lassen E of Eagle Lake and north of Murrers Upper Meadow. 1536 Comment
  CHSC108004  Lomatium nudicaule Lowell Ahart; John Dittes 2011-6-20 17497 Lassen About 40 yards east of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC29850  Lomatium nudicaule Robin Ondricek 1978-6-7 42 Lassen Lower Dry Lake along outer edges of shoreline. 1645 Comment
  UC1609377  Lomatium nudicaule Vernon H. Oswald and Lowell Ahart 1993-6-28 5617 Lassen s.-s.e. flank Harvey Mt. (n.-n.e. of Burgess Meadow, n.e. of Poison Lake, n. of Hwy. 44 on Rd. 33N06) 1798 Comment
  OBI48161  Lomatium ravenii Rhonda Riggins 1989-4-27 1641 Lassen US 395, 14 mi N Litchfield, 21 mi S Ravendale. 1311 Comment
  RSA0049623  Lomatium ravenii Dean Wm. Taylor 2012-5-17 21208 Lassen Madeline Plains, at the western base of Juniper Ridge (ca. 5 miles E of Termo) 1615 Comment
  UC1559671 Image available Lomatium ravenii Gary Schoolcraft 1988-6-6 1808 Lassen ca. 3 mi. s.e. Ravendale 1615 Comment
  UC628465 Image available Lomatium ravenii David D. Keck and J. Clausen 1935-6-24 3738 Lassen 2 mi. s. Ravendale 1464 Comment
  POM78599  Lomatium triternatum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  JEPS103208  Lomatium triternatum var. macrocarpum G. Schoolcraft 1993-6-29 2315 Lassen Ash Valley RNA 16 miles E of Adin 1554 Comment
  SEINET11130700  Lomatium triternatum var. platycarpum N. H. Holmgren, P. K. Holmgren 1978-6-11 8930 Lassen Upper Smoke Creek, S side of Observation Peak, 7.6 km (4.7 miles) NE of Rye Patch Canyon summit, 18.5 km (11.5 miles) airline distance ESE of Ravendale. 1700 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
  POM28313  Lotus crassifolius Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  JEPS114702  Lotus denticulatus Lowell Ahart, John Dittes 2008-6-20 14970 Lassen About 100 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
  RSA406186  Lotus humistratus W. Hutchinson 1925-7-1 s.n. Lassen Lassen Comment
  JEPS88234  Lotus oblongifolius var. oblongifolius Vernon H. Oswald and Lowell Ahart 1996-6-17 7818 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36, at 6.0 mi. post e. of Devils Corral Trailhead, Modoc Plateau); Modoc Plateau, Bizz Johnson Trail 1420 Comment
  UC1776700  Lotus purshianus G. Schoolcraft 1992-8-11 2247 Lassen Along Hwy 395 near Janesville Grade intersec 1280 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
  UC773895  Lotus purshianus var. purshianus L. R. Short and J. Warren 1936-6-23 S- 447 Lassen Burgess Spring Experiment Range Lassen Forest Comment
  NY716012  Lotus tenuis G. Schoolcraft 1988-7-7 1819 Lassen Near creek crossing northwest of Horne Ranch 1646 Comment
  CHSC4820  Lupinus R. Carter 1967-7-16 618 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
  SEINET5766201 Image available Lupinus M. S. Baker, Frank Nutting 1894-1 s.n. Lassen Big Valley Comment
  RSA519408  Lupinus Rockwell 1925-7-1 s.n. Lassen Beckwith Comment
  JEPS108147  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 & 28N02) and Road 28N01 1859 Comment
  CHSC30579  Lupinus arbustus Sori H. Shad 1970-7-9 45 Lassen Found at edge of Dean's Meadow. 1828 Comment
  POM252845  Lupinus arbustus subsp. silvicola A. A. Heller 1938-6-4 15142 Lassen In open places near Fredonyer Pass. 1707 Comment
  CHSC106689  Lupinus argenteus B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  UC1542916  Lupinus argenteus G. Schoolcraft 1987-9-1 1773 Lassen Ash Valley RNA 1554 Comment
  CAS-BOT-BC208740  Lupinus argenteus var. heteranthus Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 11 miles south of Ravendale, Hwy. 395 Comment
  CAS-BOT-BC208743  Lupinus argenteus var. heteranthus Roxana S. Ferris; Rena Duthie 1919-6-13 18 Lassen Madaline Comment
  CAS-BOT-BC208748  Lupinus argenteus var. heteranthus Alice Eastwood; John Thomas Howell 1940-6-16 8334 Lassen Near Susanville. Comment
  CAS-BOT-BC208762  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-7-17 47699 Lassen Park Highway, Summit Lake Camp - Lassen Volcanic National Park Comment
  CHSC60740  Lupinus argenteus var. heteranthus Vernon H. Oswald; Lowell Ahart 1993-6-14 5514 Lassen Eagle Lake Rd. (Lassen A1), 0.5 mi SW of Spaulding Tract Rd. (Rd. 518, 33N89), ca. 3 mi W of Eagle Lake. 1810 Comment
  CHSC93684  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
  CHSC99140  Lupinus argenteus var. heteranthus Lowell Ahart; John Dittes 2008-6-19 14873 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS114624  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2008-6-19 14873 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  NY736932  Lupinus argenteus var. heteranthus J. Huber 1971-6-2 140 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402 Comment
  SBBG3562  Lupinus argenteus var. heteranthus H. and M. Dearing 1938-6-30 2228 Lassen Poison Lake, 40 mi W of Susanville 1219 Comment
  SEINET10774227  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2010-7-31 Ahart 16977 Lassen T38N, R10E, center of north 1/2 Section 22. Stems from a plant 2 1/2 feet tall, on dry bare soil, 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. 1521 Comment
  UC585203  Lupinus argenteus var. heteranthus E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1757 Lassen e Red Rock; e of Red Rock 1615 Comment
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Nov 4 2011
  JEPS79210  Lupinus brevicaulis L. R. Heckard with R. C. Bacigalupi 1980-6-11 5246 Lassen along US 395, 11.3 mi n Litchfield (s of Deep Creek crossing); , n of Litchfield 1463 Comment
  NY746669  Lupinus brevicaulis M. J. Williams 1986-5-14 86- 40 --1 Lassen Near Highway 395, at Noble Emigrant Trail Sign, 7 road miles north of Litchfield 1524 Comment
  CAS-BOT-BC196639  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  RSA11957  Lupinus caudatus Elmer I. Applegate 1923-9-30 4032 Lassen Doyle. Comment
  RSA687493  Lupinus caudatus M. Bourell 1997-5-31 5879 Lassen Wendel Road 10.9 miles southeast of Highway 395. Comment
  SEINET10490606  Lupinus caudatus subsp. caudatus H. Dearing, M. Dearing 1938-6-30 Dearing 2228 Lassen 40 mi. W of susanville, poison lake. 1219 Comment
  SEINET10903428  Lupinus caudatus subsp. caudatus Duane Isely, I. Isely 1971-7-11 Isely 11379 Lassen Near apex of ascent s of eagle lake, near state #139. Stems densely clustered; Flowers violet; standard reflexed 45 degrees. 1676 Comment
  RSA0060732  Lupinus grayi Daisie Huang 2006-8-3 06080307 Lassen Slope under yellow pine forest. 1040 Comment
  CHSC4818  Lupinus lepidus var. confertus R. Carter 1967-7-16 618 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
  JEPS65081  Lupinus lepidus var. confertus W. L. Jepson Aug. 1918 7798 Lassen Raker Ranch near Buntingville; Raker Ranch naer Buntingville 1219 Comment
  SDSU4676  Lupinus lepidus var. confertus D. F. Howe 1960-9-21 2993 Lassen 2 miles north of Janesville on #395. 1219 Comment
  UCD18975  Lupinus lepidus var. sellulus Jack N. Reppert 1964-8-5 29 Lassen Lassen National Forest, Harvey Valley Allotment (HV 80-75). 1719 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
  SEINET9185950 Image available Lupinus leucophyllus Anthony Baniaga 2011-1 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  SEINET10488726  Lupinus leucophyllus Charles Piper Smith 1947-6-13 Smith 47448 Lassen Highway 299, adin, 1.3 mi west Comment
  CHSC112399  Lupinus microcarpus var. microcarpus Lowell Ahart; John Dittes, Todd Sloat 2013-6-9 18781 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
  SBBG30552  Lupinus microcarpus var. microcarpus D. Myrick 1968-6-19 1957 Lassen Hwy 395, 23 mi S of Alturas 1524 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
  UCR79417  Lupinus polyphyllus subsp. superbus J. T. Howell, G. H. True, Margaret Williams 1973-6-28 49412 Lassen Sierra Nevada Mtns/ Modoc Plateau, Elysian Valley, west of Janesville 1326 Comment
  SEINET10490190  Lupinus polyphyllus subsp. superbus Duane Isely, I. Isely 1971-7-12 Isely 11382 Lassen Bogard campground, lassen national forest. Ca 2 mi s of state hwy. 44. 30 Mi Nw of susanville. Abundant, corolla violet, standard reflexed 45 degrees; Basal leaves moderately long-petioled. Comment
  UC82153  Lupinus polyphyllus var. burkei T. S. Brandegee 1892-7-28 Lassen Janesville Comment
  HSC28312  Lupinus sellulus var. artulus D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19267 Lassen Harvey Valley near Cone Springs Comment
  SEINET10490263  Lupinus subvexus var. transmontanus David B. Dunn 1956-7-3 Dunn 11925 Lassen Collected on roadside among volcanic rocks. Along hwy 395, 5.5 mi s of likely, Before dropping into valley. Color lavender. Sagebrush common. Comment
  CDA40734  Lycopus americanus Yeager Aug 1929 s.n. Lassen Honey Lake District. 0 Comment
  CHSC93681  Lythrum hyssopifolia Lowell Ahart; John Dittes 2005-6-2 11969 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
  JEPS107819  Lythrum hyssopifolia Lowell Ahart, John Dittes 2005-6-2 11969 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
  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
  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
  CDA18272  Machaeranthera canescens G. D. Barbe 1974-8-2 1937 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UCSB48516  Madia Clare B. Hardham 1961-6-16 7451 Lassen collected at Gold Run Creek S of Susanville Comment
  RSA0011458  Madia R. F. Thorne, Larry E. DeBuhr 1975-8-22 46977 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  OBI55502  Madia citrigracilis David J. Keil 1992-7-25 23608 Lassen Along hwy 36, 9.1 mi E of Plumas County line, W of Susanville Comment
  UC1136966  Madia elegans L. R. Short 1936-6-26 S- 457 Lassen Burgess Spr. Exp. Range Lassen Forest 1837 Comment
  CAS-BOT-BC343693  Madia elegans Elmer I. Applegate 1923-9-30 4034 Lassen Constantia Comment
  CAS-BOT-BC343698  Madia elegans Margaret Williams; Louella Bass 1972-10-22 EV 7 Lassen Elysian Valley, northwest of Janesville 1325 Comment
  JEPS88219  Madia exigua Vernon H. Oswald and Lowell Ahart 1996-6-17 7806 Lassen n side of Bizz Johnson Trail between Devils Corral Trailhead and 6.0 milepost (trailhead located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 Comment
  UC33229  Madia exigua M. S. Baker and F. Nutting 1894-7-2 Lassen Dixie Mts. Comment
  UC1053319  Madia glomerata J. M. Tucker 1950-7-25 1975 Lassen road from Pittville 33 mi nw Susanville Comment
  CAS-BOT-BC334690  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  CAS-BOT-BC343062  Madia gracilis Clare B. Hardham 1969-8-28 17460 Lassen Slope west of Janesville Comment
  RSA338583  Madia gracilis Noel 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. 1677 Comment
  JEPS103229  Malacothrix floccifera G. Schoolcraft 1997-6-24 2595 Lassen About 4 miles W of Doyle on S side of Doyle Grade Road 1767 Comment
  CAS-BOT-BC347440  Malacothrix floccifera Louella Bass 1983-6-2 s.n. Lassen On Sears Road near Janesville Comment
  UC585134  Malacothrix glabrata E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1767 Lassen ridge above Red Rock 1524 Comment
  SEINET11601669 Image available Malacothrix glabrata F. B. Henning 1915-5-28 s.n. Lassen Honeylake, Calif. Comment
  UC186080  Malacothrix glabrata unknown 1892-6-22 Lassen Honey Lake Comment
  UCD116543  Malva neglecta P. B. Schultz 1967-7-11 72 Lassen 1 mile south of Milford on U.S. Highway 395. 1325 Comment
  SEINET8894054  Malvella leprosa D. S. Mapes 1942-7-13 s.n. Lassen Mapes Ranch, Litchfield. 1067 Comment
  CHSC58832  Marsilea oligospora Vernon H. Oswald; Lowell Ahart 1992-7-16 5126 Lassen Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), 1.0 mi E of Willow Spring Rd, (Forest Rd. 31N56), between Old Station and Susanville. 1745 Comment
  JEPS89847  Marsilea oligospora Dean W. Taylor 1974-6-14 3712 Lassen on Hwy. 44 ca. 2 mi. w. from junction w/ Pittville Rd.; Modoc Plateau, Poison Lake 1615 Comment
  HSC935  Marsilea vestita Fred J. Kindel 1955-6-25 Lassen Eagle Lake Comment
  CHSC117546  Marsilea vestita subsp. vestita Lowell Ahart 2016-7-13 21130 B Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  SEINET3816871  Matricaria discoidea Noel H. Holmgren, Patricia K. Holmgren 1980-7-5 9522 Lassen Upper smoke creek drainage, 20.4 km from U.S. highway 395 via Rye Patch Canyon, 24 km airline distance southeast of Ravendale, 1580 Comment
  RSA647538  Matricaria matricarioides Marion P. Harthill 1972-6-16 783 Lassen Doyle 1372 Comment
  CDA8327  Matricaria occidentalis T. C. Fuller 1963-6-1 10617 Lassen West side of road to Susanville, 2.0 miles south of Pittville. 0 Comment
  SEINET4671551  Melica bulbosa H. Durio 1979-5-23 s.n. Lassen Adin, Meyers Ranch Comment
  CAS-BOT-BC269351  Melica californica Gary Schoolcraft 1985-6-12 1420 Lassen CA-5, slopes of Fredonyer Peak, 33-12-35 NW 2194 Comment
  UC972185  Melica fugax Milo S. Baker 1952-5-23 12427 Lassen e of Chester (Highway 36) Comment
  CHSC80722  Melica stricta V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10037 Lassen Northeast of Doyle in the Fort Sage Mtns, trail to top of mountain from the end of a 4WD road. 1828 Comment
  CHSC112987  Melilotus officinalis Lowell Ahart; John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  HSC81799  Mentzelia albicaulis Thomas W. Nelson, Jane Nelson 1980-7-6 6025 Lassen Ash Valley, along branch road off Adin-Madeline Rd. just S of bridge over Ash Creek, 16 mi. SE of Adin, 200 yds. SE of main road. 1555 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
  UCD55287  Mentzelia albicaulis Ellen Dean; Gary Schoolcraft 2006-5-16 3106 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. 1244 Comment
  HSC42457  Mentzelia albicaulis Barbara Kelly 1977-8-9 569 Lassen On Rd. from Adin to Madeline, 10.1 mi. E of Madline. Comment
  CHSC5299  Mentzelia congesta R. Gein 1946-6-25 Lassen Webb's Camp, Eagle Lake. 1554 Comment
  UCR244033  Mentzelia congesta Jim Andre, G. L. Clifton 1993-6-3 19703 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley near Laufman Ranger Station, c. 4 mi. SSE of Milford (at U.S. 395), c. 30 mi. south of Susanville, just inside Plumas NF boundary 1477 Comment
  CHSC4782  Mentzelia dispersa R. Carter 1967-6-27 566 Lassen 1.75 mi W of Eagle Lake Biology Station. Growing in dry rocky soil ca. 10 yds. off S side of Rd. 1584 Comment
  CHSC92643  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
  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
  UC1121656  Mentzelia montana Robert W. Gardner 1937-6-18 G 22 Lassen Halls Flat Quadrangle, Burgess Spring Experimental Range Comment
  CHSC6266  Micranthes oregana M. West 1946-7-12 Lassen Stephens Ranch. 1905 Comment
  CHSC99301  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-22 15036 Lassen About 220 yards west of the road levee, open dry meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  CHSC61166  Microsteris gracilis Vernon H. Oswald; Lowell Ahart 1993-5-12 5376 Lassen Canal crossing Hwy. 44, 3.5 mi NW of A21 ( to Westwood). 1729 Comment
  SEINET10902895  Microsteris gracilis Mary Susan Taylor 1974-5-4 Taylor 227 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
  RSA122927  Microsteris gracilis subsp. gracilis Anonymous 1936-5-7 S- 343 Lassen Lassen National Forest, MDM, Burgess Spr. Exp. Range 1738 Comment
  NY963937  Microsteris gracilis var. humilior V. E. Grant 1956-5-18 9802 Lassen About 8 miles south of Madeline 1280 Comment
  UC1609128  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-7-8 5652 Lassen 1.9 mi n Hwy. 44 (Pittville Rd. (Lassen 111, 36N01), se edge of lake, on the e side of the railroad, which parallels the lake shore at this point); Poison Lake 1709 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
  UC1778583  Mimulus evanescens S. E. Schoenig 1998-7-5 98 -70 Lassen SW shore of Moll Reservoir, 2 meters from waters edge. 1499 Comment
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May 29 2009
  UC773851  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  JEPS10776  Mimulus moniliformis Brown and Wieslander 1922-7-30 17 Lassen near Martin Springs Comment
  RSA80410  Mimulus nanus var. mephiticus F. W. Peirson 1926-6-24 6853 Lassen Madeline Plain. Comment
  UC1609130  Mimulus nanus var. nanus Vernon H. Oswald and Lowell Ahart 1993-6-3 5482 Lassen 1.8 mi n Lassen 21 (32N02) to Eagle Lake (Champs Flat Rd. (Lassen 105, Forest 32N28Y), nw edge of valley, between Poison Lake and Susanville); Pine Creek Valley 1728 Comment
  JEPS4302  Mimulus pulsiferae A. A. Heller 1938-6-22 15187 Lassen 1 mi s Westwood 1524 Comment
  UC726696  Mimulus pulsiferae A. A. Heller 1938-6-22 15187 Lassen one mi e Westwood 1524 Comment
  UC886329  Mimulus pulsiferae C. L. Hitchcock 1940-5-26 6611 Lassen lava beds ca 12 mi n Fall River Mills (Shasta Co.); Fall River 1371 Comment
  RSA536390  Mimulus pygmaeus Beth Corbin 1991-5-23 618 Lassen Adobe South Vernal Pool, 3 miles N of Timbered Crater, 14 miles N of Fall River Mills. 1098 Comment
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Jul 2 2013
  RSA536396  Mimulus pygmaeus Beth Corbin 1991-6-26 633 Lassen Big Merrill Flat. 14 miles NW of Susanville. 1790 Comment
  UC1609384  Mimulus suksdorfii Vernon H. Oswald and Lowell Ahart 1993-6-14 5522 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)); Eagle Lake 1566 Comment
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Nov 22 2007
  JEPS79150  Mimulus torreyi L. R. Heckard with R. Bacigalupi 1980-6-12 5255 Lassen ne Westwood (near golf course) 1554 Comment
  HSC20810  Mimulus torreyi M. T. Milligan 1964-7-16 138 Lassen 2 mi. W on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  CAS-BOT-BC384031  Mirabilis laevis var. villosa M. Bourell 1997-5-31 5881 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  CAS-BOT-BC221974  Monardella odoratissima subsp. glauca John Thomas Howell 1934-7-8 12487 Lassen Spalding's, Eagle Lake Comment
  CHSC5272  Monardella odoratissima subsp. glauca J. B. Kimsey 1946-6-11 Lassen Pine Creek, near Eagle Lake. 1580 Comment
  RSA0037134  Monardella odoratissima subsp. glauca L. P. Janeway, B. Castro 2012-7-2 10933 Lassen Modoc Plateau. Along Skedaddle Ranch Road 6.4 road km north of Skedaddle Creek at an unnamed tributary of Bull Creek. 1533 Comment
  CHSC29873  Monardella odoratissima subsp. pallida Robin L. Ondricek 1978-6-27 74 Lassen 1977 Burn, .1 mi w of intersection with road which passes Colman Lake. 1889 Comment
  CHSC83680  Monardella odoratissima subsp. pallida L. P. Janeway 2001-6-28 7235 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
  UC25488  Monardella odoratissima subsp. pallida M. S. Baker and Frank Nutting 1894-7-28 Lassen mts. s Eagle Lake Comment
  CAS-BOT-BC213934  Monardella odoratissima subsp. pallida Margaret M. Hanna 1956-6-3 927 Lassen Highway 299, 2 mi. west of Nubeiber Comment
  CAS-BOT-BC222146  Monardella odoratissima subsp. pallida A. E. Anderson 1967-7-13 92 Lassen Eastern slope of Dean's Ridge, 0.6 mi. s of Five Corners on road to Gallatin Beach 1676 Comment
  CHSC99530  Monolepis nuttalliana Lowell Ahart; John Dittes 2008-6-22 15034 Lassen On the banks of a small natural drainage, 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
  POM203792  Monolepis pusilla J. T. Howell 1934-6-10 11895 Lassen Horse Lake Comment
  CAS-BOT-BC444693  Montia chamissoi Lassen 1927 G. S. Crew 1927-6-25 25 Lassen Lassen National Forest. Norval Flat 2051 Comment
  HSC95205  Montia chamissoi Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 542 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS28404  Montia chamissoi George W. Gillett 1957-7-28 932 Lassen 1 mi above Butte Lake (Lassen Volcanic National Park, Widow Lake Trail); Lassen Volcanic National Park, Widow Lake Trail 1905 Comment
  JEPS94601  Montia chamissoi Vernon H. Oswald and Lowell Ahart 1997-5-27 8498 Lassen on Forest Route 38N04 0.1 mi e Hwy. 139 ((between Hwy 139 near Willow Springs Guard Station and Coyote Flat), n of Susanville) 1546 Comment
  NY497727  Montia chamissoi G. Schoolcraft 1982-6-16 703 Lassen Along Smoke Creek north of Shinn Ranch 1554.5 Comment
  CAS-BOT-BC445065  Montia linearis Louella Bass 1973-5-29 55 Lassen Elysian Valley. 1325 Comment
  RSA0035909  Montia linearis Lowell A. Ahart, John Dittes 2008-6-20 14938 Lassen About 100 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
  RSA292423  Montia linearis Noel Holmgren, Patricia K. Holmgren 1978-6-11 8915 Lassen Lassen County: vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28km (17.4miles) E of Ravendale and 22.5km (14miles) airline distance. 1677 Comment
  CAS-BOT-BC445067  Montia linearis Clarence R. Quick 1962-6-17 62 -20 Lassen Swains Hole, south of Blacks Mountain Experimental Station 1554 Comment
  CAS-BOT-BC262636  Muhlenbergia asperifolia C. S. Robinson 1928-9-18 120 Lassen Lassen National Forest. Hanna Estate, Morgan Springs. Around Sulphur Springs 1508 Comment
  CAS-BOT-BC260595  Muhlenbergia filiformis G. Schoolcraft 1997-7-30 2623 Lassen W slope of Diamond Mountain 1889 Comment
  CAS-BOT-BC260597  Muhlenbergia filiformis Leo W Whitney 1933-8-4 2160 Lassen Near Sheepshead Comment
  CHSC96693  Muhlenbergia filiformis Gordon Leppig; Juli Neander, Kai Neader 1997-7-25 680 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  RSA129384  Muhlenbergia filiformis H. S. Yates 1936-8-12 6018 Lassen Susanville. 1524 Comment
  CAS-BOT-BC275333  Muhlenbergia jonesii John R. Reeder; Charlotte G. Reeder 1973-7-1 6240 Lassen Ca. 25 miles NW of Susanville along State Highway 44 in Lassen National Forest 1767 Comment
  RSA256304  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-6-5 6237 Lassen 25 miles NW of Susanville along Hwy 44 in Lassen Nat'l Forest 1768 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
  UCR197924  Muhlenbergia richardsonis Beecher Crampton 1954-7-6 2073 Lassen Modoc Plateau, 17 miles south of Ravendale along US highway 395. 1524 Comment
  RSA0011555  Muhlenbergia richardsonis R. F. Thorne, Larry E. DeBuhr 1975-8-22 46997 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 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
  UC1567382  Muilla transmontana G. Schoolcraft 1989-5-3 1863 Lassen Susanville NW corner of Secret Valley near Karlo. 1356 Comment
  UCD55275  Muilla transmontana Ellen Dean 2006-5-15 3090 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. 1246 Comment
  CAS-BOT-BC515650  Muilla transmontana H. D. Ripley; R. C. Barneby 1944-5-29 5953 Lassen South of Jamesville 1280 Comment
  CAS-BOT-BC515653  Muilla transmontana John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49163 Lassen Elysian Valley northwest of Jamesville 1051 Comment
  UC1951071  Myosurus apetalus Debra Valov 2009-4-26 2009020 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 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
  CHSC64893  Myosurus minimus Vernon H. Oswald; Lowell Ahart 1995-6-19 6895 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. 1383 Comment
  RSA125293  Myosurus minimus Peter H. Raven 1958-6-17 13285 Lassen Along United States Hwy 395, 1.9 miles S of Ravendale. Comment
  CHSC30584  Myriophyllum sibiricum P. V. Caldwell 1972-6-16 264 Lassen 3/4 miles E, on Forest Rd. 5, 1 1/2 miles from the station in Kildeere ond. 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
  SBBG118561  Myriophyllum sibiricum R. F. Thorne with C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir, near jct of Grasshopper Rd and St Hwy 139 Comment
  UC1101505  Myriophyllum sibiricum Malcolm A. Nobs and S. Galen Smith 1949-7-20 1049 Lassen Irrigation canal, ca. 4 mi W of Adin. Comment
  RSA634201  Myriophyllum sibiricum Robert F. Thorne, C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir: Near junction of Grasshopper Road and Highway 139. Comment
  UCD55269  Nama aretioides var. multiflora Ellen Dean 2006-5-15 3070 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. 1247 Comment
  POM126780  Nama densa Franklin P. Nutting s.n. Lassen Eagle Lake. Comment
  UC1609381  Nama densa var. densa Vernon H. Oswald and Lowell Ahart 1993-6-14 5539 Lassen ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd. (Lassen A1) at Sandy Beach on w shore Eagle Lake); w shore Eagle Lake, at Sandy Beach 1566 Comment
  UC735057  Nama densa var. parviflora Lincoln Constance 1946-7-3 3099 Lassen 7 mi n of Spaldings (northern edge of Eagle Lake); northern edge of Eagle Lake 1676 Comment
  UC971978  Nama lobbii Annetta Carter 1946-8-19 1777 Lassen crest of ridge ten mi ne Susanville; ne of Susanville 1676 Comment
  RSA508616  Narthecium californicum Mrs. R. M. Austin 1880-8-3 s.n. Lassen Mount Dyer 1829 Comment
  CHSC23862  Navarretia breweri K. R. Stern 1974-6-26 5856 Lassen Ditch bank beside railroad track, e side of Poison Lake Rd. to Pittville, 1.8 mi nw of intersection with Hwy. 44. Comment
  CHSC45356  Navarretia breweri Vernon Oswald 1986-5-28 2058 Lassen Hwy 139 between Eagle Lake and Adin, 32.0 mi n of Susanville. 1630 Comment
  SBBG58267  Navarretia breweri E. Rockwell -Jun-1925 Lassen Eagle Lake 1554 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
  UCD37481  Navarretia breweri Beecher Crampton 1960-6-20 5737 Lassen Lassen County, Lassen National Forest, 6.5 miles north of Bogard Ranger Station, Little harvey Valley. 1676 Comment
  SEINET3894761  Navarretia intertexta Leigh A. Johnson, Haley M. Smith 2011-6-25 11 -073 Lassen Nubieber. Adjacent to New Cemetary Road (1.1 miles west of Babcokc Rd in Nubieber) just beyond its jct with Hwy 299, between Hwy and road.; 0 Comment
  UC1124160  Navarretia intertexta A. Simontacchi 1940-6-30 904 Lassen 2.6 mi s Ladder Butte; Lassen National Forest, Halls Flat Quad. 1684 Comment
  CHSC116082  Navarretia intertexta subsp. intertexta Lowell Ahart; John Dittes 2015-7-13 20303 Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC34346  Navarretia intertexta subsp. propinqua K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5808 Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  UC1594648  Navarretia intertexta subsp. propinqua Vernon H. Oswald and Lowell Ahart 1992-7-16 5101 Lassen 1.2 mi se County Rd. A21 (Long Lake on the s of Hwy 44, between Old Station and Susanville); Long Lake 1745 Comment
  UC909095  Navarretia intertexta subsp. propinqua G. L. Stebbins Jr. 1949-8-6 4001 Lassen nw of Susanville; Hog Flat 1676 Comment
  RSA67608  Navarretia leptalea Verne Grant, Alva Grant 1950-7-13 8943 Lassen Camp Fredonyer, on road from Westwood to Susanville 1524 Comment
  CHSC27670  Navarretia leptalea subsp. bicolor Robert A. Schlising 1978-7-9 3312 Lassen South of Eagle Lake. Area between Papoose Meadows and Eagle Lake Road. Comment
  UC909068  Navarretia leucocephala subsp. bakeri G. L. Stebbins Jr. 1949-8-6 4003 b Lassen between Susanville and McArthur (edge of Feather Lake); Feather Lake 1676 Comment
  CHSC67574  Navarretia leucocephala subsp. leucocephala James Jokerst 1983-7-24 1878 Lassen Near madeline Plains. Vernal pool. 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
  JEPS19814  Navarretia leucocephala subsp. minima Rimo Bacigalupi with S. Galen Smith 1957-6-28 6001 Lassen 3.1 mi s Madeline (along U.S. Highway 395); Madeline Plains 1615 Comment
  POM312617  Navarretia leucocephala subsp. minima Malcolm A. Nobs, S. Galen Smith 1949-5-29 756 Lassen Nubieber on Great Northern Railway, Highway 299 Comment
  UC1058208  Navarretia leucocephala subsp. minima C. McMillan 1949-6-15 1542 Lassen 5 mi w Bieber Comment
  UC1228161  Navarretia leucocephala subsp. minima Beecher Crampton 1960-6-20 5731 Lassen 0.5 mi s Black Mtn. exper. Sta. U.S.D.A. Forest Service (11 mi nw Bogard Ranger Sta); Lassen National Forest 1706 Comment
  UCD48537  Navarretia leucocephala subsp. minima Gerald Dickinson 1963-7-3 75 Lassen Along U.S. Highway 299, 1 mile west of Bieber. 1249 Comment
  CHSC110778  Navarretia sinistra subsp. sinistra Dean Wm. Taylor 2012-7-18 21281 Lassen Cascade Ranges. Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 miles S of Adin). 1706 Comment
  SEINET10458443  Nemacladus rigidus Rupert C. Barneby 1943-6-15 Barneby 5765 Lassen Smoke Creek northeast of Viewland 1341 Comment
  POM68111  Nemacladus sigmoideus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  CAS-BOT-BC219366  Nemophila Louella Bass 1973-4-15 26 Lassen Elysian Valley 1325 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
  CHSC107325  Nemophila pedunculata Lowell Ahart; John Dittes 2011-6-20 17481 Lassen On old gopher mounds, meadow, about 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  JEPS126535  Nemophila pedunculata Lowell Ahart, John Dittes 2016-6-7 21010 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  UC1069208  Nemophila pedunculata A. Simontacchi 1940-5-14 713 Lassen 10.2 mi e Coyote Spring; Halls Flat Quad., Lassen National Forest, e of Coyote Spring Comment
  HSC30192  Nemophila spatulata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19156 Lassen 3 mi. N of Westwood Comment
  CHSC4786  Neoholmgrenia andina R. Carter 1967-6-29 572 Lassen On roadside, N side of Rd. Along road to Murrer's Meadow, Eagle Lake. 1584 Comment
  UC20413  Neoholmgrenia andina Mrs. R. M. Austin and Bruce June 1898 2364 Lassen Shumway Comment
  CHSC116095  Nepeta cataria Lowell Ahart; John Dittes 2015-7-13 20313 Lassen Along levee road, 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
  CHSC106075  Nicotiana attenuata Lowell Ahart; John Dittes 2010-7-31 17022 Lassen On the north side of the road, about 40 yards west 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
  SEINET6174383  Nicotiana attenuata A. Kowal, D. Mathews, S. Massed, S. Batiuk, B. Kalb 2011-8-10 NV 030 -594 Lassen Constantia fire, Constantia Road off Highway 395 1344 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
  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
  UC49996  Nothocalais troximoides M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CAS-BOT-BC171462  Oenothera boothii Louella Bass 1978-5-18 s.n. Lassen Amedee Comment
  JEPS94105  Oenothera deltoides subsp. piperi Vernon H. Oswald and Lowell Ahart 1998-5-22 9095 Lassen Hwy. 395 at an intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  UC107611  Oenothera deltoides subsp. piperi T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  UC1122216  Oenothera deltoides subsp. piperi E. Sawyer 1935-6-27 231 Lassen Long Valley Sierraville Quadrangle 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
  SEINET10491874  Oenothera deltoides subsp. piperi Paul Gallian, Billy Joe Cox 1971-6-2 Gallian 477 Lassen Approx 3 mi s of hanesville at honey lake, rest area on us hwy 395; in sagebrush-grass margin between jeffery pine oak forest and honey lake. 1250 Comment
  RSA27327  Oenothera flava C. L. Hitchcock 1940-5-26 6642 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  UC524174  Oenothera flava subsp. flava Elmer I. Applegate 1929-6-24 5881 Lassen s Bieber; Big Valley Comment
  RSA0054993  Oenothera tanacetifolia James R. Shevock 1972-5-20 1817 Lassen S. of Ravendale, HIghway 395. 1371 Comment
  SEINET8884758  Olsynium douglasii R. Mills 1956-4-29 13 Lassen 7 miles south of Susanville, , along a creek bed on south side of hill. 1279 Comment
  JEPS26569  Orobanche corymbosa subsp. corymbosa Lauramay T. Dempster 1961-6-17 1676 Lassen About 8 miles north of Karlo Road junction with Highway 395. Comment
  JEPS70105  Orobanche corymbosa subsp. corymbosa L. Maynard Moe 1969-8-4 103 Lassen About 1 mile north of Litchfield on U. S. Highway 395. 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
  UC718016  Orthocarpus bracteosus David D. Keck 1944-7-8 5445 Lassen 2 mi e Westwood (in meadow leading to Mountain Meadows Reservoir); Sierra Nevada, mdw leading to Mountain Meadows Reservoir 1524 Comment
  CAS-BOT-BC266614  Orthocarpus cuspidatus Lassen 1927 G. S. Crew 1927-7-15 66 Lassen 1 mile W Bogard Ranger Station 1737 Comment
  UC1537445  Orthocarpus cuspidatus subsp. cryptanthus Gordon H. True Jr. 1936-6-25 526 Lassen e Harvey Ranger Station (Harvey Valley); Harvey Valley 1706 Comment
  JEPS124596 Image available Orthocarpus imbricatus Dixie Funnell 1965-7-13 146 Lassen 4.2 miles West of Dead Horse Summit Highway 89. Comment
  RSA712893  Orthocarpus lacerus L. P. Janeway 2005-7-3 8454 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
  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
  UC1137732  Osmorhiza occidentalis L. R. Short and J. Warren Jun 9 1936-Jul 3 1936 S- 403 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1844 Comment
  CAS-BOT-BC413245  Oxytheca dendroidea subsp. dendroidea Robert F. Hoover 1940-10-1 4656 Lassen Janesville Comment
  CAS-BOT-BC317146  Packera streptanthifolia G. Schoolcraft 1986-6-4 1600 Lassen About 1 mile west of Nevada stateline. 1341 Comment
  UC35992  Packera subnuda M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC69607  Paeonia brownii J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  JEPS121279  Panicum Lowell Ahart, John Dittes 2013-7-23 18909 Lassen On the E side the gravel road, N-S road W of Big Canal, 0.76 Mile N of CA 299, 4.9 air miles NE of Bieber, Big Valley. Comment
  NY1092251  Panicum capillare A. Tiehm 1980-5-29 5759 Lassen Amedee Hot Springs, north end of Honey Lake Valley, 4 air miles SE of Wendel. 1220 Comment
  POM115996  Panicum capillare Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  CAS-BOT-BC259609  Pascopyrum smithii G. Schoolcraft 1998-7-14 2760 Lassen On flat NE of Shaffer Mountain 1356 Comment
  CAS-BOT-BC259612  Pascopyrum smithii James Jokerst 1983-7-25 1898 Lassen Near Madeline Plains 1614 Comment
  CDA5489  Pastinaca sativa T. C. Fuller 1959-7-7 2793 Lassen North of Cornell Street, west of Foss Street, Susanville. 0 Comment
  CHSC68873  Pectiantia pentandra Vernon H. Oswald; Lowell Ahart 1997-6-24 8615 Lassen South of Susanville on the north side of Diamond Mtn. at a springy slope with streamlets along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. 1889 Comment
  CHSC91320  Pectocarya penicillata Lowell Ahart; John Dittes 2005-6-1 11907 Lassen Road edge, on the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  UC1258487  Pectocarya penicillata G. Schoolcraft 1980-5-8 231 A Lassen e Herlong; Bureau of Land Management 1219 Comment
  HSC68839  Pedicularis centranthera Gary Schoolcraft 1980-4-30 211 Lassen W of Shaffer Well, N of Shaffer Mtn. 1354 Comment
  CHSC5899  Pedicularis semibarbata P. Balch 1955-7-20 Lassen Eagle Lake. 5 mi from Antelope Lookout. 2072 Comment
  UC1713528  Pedicularis semibarbata Leo Whitney 1935-6-19 3270 Lassen Camp 10, Fruit Grower's Supply company Camp 10; Lassen National Forest Comment
  CHSC5900  Penstemon deustus var. pedicellatus W. Vinyard 1946-6-10 Lassen Eagle Lake. Pelican Point. 1554 Comment
  CHSC61241  Penstemon deustus var. pedicellatus P. V. Caldwell 1972-6-15 222 Lassen 10 ft n of Lecture Lab. entrance. Eagle Lake Field Station. 1554 Comment
  JEPS11227  Penstemon deustus var. pedicellatus Jos. Grinnell 1928-6-18 Lassen Eagle Lake 1584 Comment
  CHSC14190  Penstemon gracilentus M. S. Taylor 1974-7-10 276 Lassen Abundant in meadow ca. 2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  JEPS11269  Penstemon gracilentus Jos. Grinnell 1928-6-16 Lassen Eagle Lake Lassen Peak Region 1584 Comment
  JEPS11274  Penstemon gracilentus Brown and Wieslander 1922-7-23 43 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  POM44653  Penstemon gracilentus Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC1035884  Penstemon gracilentus Annie M. Alexander and Louise Kellogg 1946-8-13 5157 Lassen w side of Eagle Lake Comment
  UC1483843  Penstemon gracilentus G. Schoolcraft 1979-7-3 110 Lassen 4.3 mi up the road from Observation Peak (near Curlleaf Mtn.); up rd from Obseration Peak, near Curlleaf Mtn. 2133 Comment
  NY603846  Penstemon humilis var. humilis N. H. Holmgren 1978-6-11 8927 Lassen Upper Smoke Creek, southeast side of Observation Peak, 11.3 km (7 miles) northeast of Rye Patch Canyon summit, 21 km (13 miles) airline distance east-southeast of Ravendale. 1700 Comment
  NY604216  Penstemon janishiae G. L. Stebbins 1937-7-10 2282 Lassen Summit and east slope of Diamond Mountain 2194.6 Comment
  UC1537429  Penstemon laetus Gordon H. True Jr. 1936-6-25 530 Lassen e Harvey Ranger Station (Harvey Valley); , e of Harvey Ranger Station 1767 Comment
  NY627262  Penstemon neotericus A. A. Heller 1938-6-22 15181 Lassen 1 mile south of Westwood Comment
  POM195120  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen 2 miles east of Westwood. 1494 Comment
  NY627268  Penstemon neotericus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  RSA519227  Penstemon neotericus Karl Vincent 1987-8-5 4499 Lassen Sierra Nevada, Roop Mtn. Along CA A1 ca 4 mi NW of jct CA 36, site ca 6 air miles WNW of Susanville. 1738 Comment
  CAS-BOT-BC239220  Penstemon newberryi var. berryi Hans Leschke 1957-7-12 s.n. Lassen Lassen Volcanic National Park, above Cold Boiling Lake 2377 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
  CHSC59571  Penstemon roezlii Mary Meyer 1980-5-20 524 Lassen Along ridge above Secret Creek. 1432 Comment
  HSC30182  Penstemon roezlii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19289 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  JEPS29104  Penstemon roezlii Lauramay T. Dempster 1961-6-17 1680 Lassen just w Tule Mountain; just w of Tule Mountain 1645 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
  RSA668002  Penstemon roezlii Karl Vincent 1986-6-14 4321 Lassen Upper Long Valley, along E side of US 395, ca 5.5 mi N of jct US 70, ca 13.2 rd mi N of Bordertown and Nevada state line. 1463 Comment
  UC887288  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  JEPS103216  Penstemon roezlii G. Schoolcraft 1989-7-3 1947 Lassen Diamond Mtns. on Diamond Peak 2346 Comment
  NY650106  Penstemon roezlii D. W. McNeal 1983-6-5 2837 Lassen On a road bank beside Highway #395, 9.2 miles north of the Plumas Co. line. Comment
  JEPS128128  Penstemon rydbergii Catherine Bauer with Ellen Bauer Benson 2017-8-18 25 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  CHSC107320  Penstemon rydbergii var. oreocharis Lowell Ahart; John Dittes 2011-6-20 17502 Lassen Meadow, about 40 yards west of the stream, about 50 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC12939  Penstemon rydbergii var. oreocharis K. R. Stern 1974-6-26 5869 Lassen E end of Champs flat. Comment
  CHSC30588  Penstemon rydbergii var. oreocharis Marc Held 1972-6-29 23 Lassen South end of Dean's Meadow. Comment
  CHSC5915  Penstemon rydbergii var. oreocharis R. Gein 1946-6-24 Lassen McCoy Flat, west of Eagle Lake. 1645 Comment
  POM252929  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-22 15182 Lassen Along Hwy 36, 1 mile east of Westwood. 1524 Comment
  RSA702452  Penstemon rydbergii var. oreocharis L. P. Janeway 2004-6-26 8161 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  UC1063480  Penstemon rydbergii var. oreocharis A. Simontacchi 1940-6-3 792 Lassen 8.3 mi se Alcohol Jacks Cabin; Lassen National Forest, Halls Flat Quad. 1706 Comment
  JEPS29738  Penstemon speciosus Rimo Bacigalupi and L. R. Heckard 1962-5-28 8493 Lassen along U.S. highway 395, 10 mi s Milford; s of Milford 1219 Comment
  NY661007  Penstemon speciosus A. J. Cronquist 1959-6-16 8455 Lassen 26 miles northwest of Reno Comment
  UC1583941  Penstemon speciosus G. Schoolcraft 1990-7-2 2100 Lassen sw slopes of Cold Spring Mtn. 1889 Comment
  UCR183192  Penstemon speciosus Jim Andre, G. L. Clifton 1993-5-28 7713 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  CAS-BOT-BC239662  Penstemon sudans John Thomas Howell 1977-6-22 52404 Lassen West of Susanville near the confluence of Willard Creek and Susan River 1432 Comment
  CAS-BOT-BC243406  Penstemon sudans G. Schoolcraft 1998-7-14 2761 Lassen NE of Shaffer Mtn. 1356 Comment
  CAS-BOT-BC243409  Penstemon sudans David D. Keck 1930-7-23 948 Lassen Susanville 1280 Comment
  CAS-BOT-BC243412  Penstemon sudans David D. Keck; J. Clausen 1935-6-25 3756 Lassen Susanville Comment
  CHSC43495  Penstemon sudans Lowell Ahart; John Thomas Howell 1974-7-9 531 Lassen Along Eagle Lake Road, about 3 1/2 miles north-west of Susanville. 1584 Comment
  CHSC4798  Penstemon sudans R. Carter 1967-7-13 587 Lassen On S. side of Rd. ca. 1 mi NE of Eagle Lake Biology Station. 1584 Comment
  UC423673  Penstemon sudans David D. Keck 1930-7-23 948 Lassen Susanville Sierra Nevada, Susanville 1280 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
  UC2027331  Penstemon venustus Anthony Baniaga and R. Bomberger 2011-7-28 479 Lassen Lassen National Forest. Along Highway 36. Fredonyer Pass quadrangle Comment
  HSC100163  Peraphyllum ramosissimum J. P. Smith, & J. O. Sawyer 2011-8-14 13378 Lassen Along service road to transmitter facility, 3.2 mi. W of Hwy. 395. Comment
  RSA594173  Peraphyllum ramosissimum S. O. Mattoon 1974-6-2 42 Lassen Cottonwood Mountains: Vicinity of Dodge Res.; Lassen County Road 502. 1829 Comment
  CHSC29907  Perideridia bolanderi Robin Ondricek; Wesley Dempsey 1978-6-7 43 Lassen Ridge E of Lower Dry Lake, 12.5 mi N of Susanville. 1706 Comment
  JEPS107689  Perideridia bolanderi Lowell Ahart, John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  RSA0065395  Perideridia bolanderi M. P. Harthill 1971-6-21 230 Lassen Ravendale. Comment
  SEINET10545979  Perideridia bolanderi subsp. bolanderi Paul Gallian, David B. Dunn 1971-6-2 Gallian 506 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along highridge and in sandy wash. 1402 Comment
  SEINET12121439  Perideridia gairdneri Unknown 1978-1 62 Lassen Papoose Creek ca 1 km S of Gallatin Beach, S end of Eagle L 1585 Comment
  SEINET5845147  Peritoma platycarpa J. A. Young 1982-6-7 s.n. Lassen Redlands 1676 Comment
  UCD20364  Peritoma platycarpa Joe DiTomaso 2002-6-4 s.n. Lassen About 3 miles northwest of the junction between Nevada, Modoc and Lassen counties. Study plots near Susanville. Comment
  CHSC30561  Persicaria Sori H. Shad 1970-6-19 8 Lassen Found on pine creek, 50 yard below california fish and game cambine [sic[. 1524 Comment
  CHSC13648  Persicaria amphibia M. S. Taylor 1974-7-10 312 Lassen Abundant in floating masses along w shore of Eagle Lake in vicinity of Grebe Nesting Area, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC30568  Persicaria amphibia Sori H Shad 1970-6-19 29 Lassen Found in aquatic habitate near Pine Creek fish Hatchery. 1524 Comment
  CAS-BOT-BC413523  Persicaria amphibia John Thomas Howell 1975-7-23 51405 Lassen Along Hwy. 395 between Johnstonville and Janesville 1280 Comment
  SJSU10648  Persicaria amphibia H. L. Buckalew 1961-7-8 Lassen Blue L, Warner Mts 1828 Comment
  CHSC704  Phacelia adenophora A. Santos 1946-6-20 Lassen Grasshopper Valley. 1615 Comment
  JEPS79216  Phacelia adenophora L. R. Heckard with R. C. Bacigalupi 1980-6-11 5264 Lassen along US 395 s Deep Creek crossing (11.3 mi n of Litchfield, flat area and wash between railroad and hwy) 1463 Comment
  POM266184  Phacelia adenophora J. T. Howell 1934-6-10 11898 Lassen Horse Lake Comment
  RSA38634  Phacelia adenophora P. A. Munz 1947-5-19 11879 Lassen Highway 395, 4 miles south of Madeline. Comment
  UC1088434  Phacelia adenophora Peter H. Raven and Otto T. Solbrig 1958-6-17 13281 Lassen 5.7 mi s Ravendale Comment
  RSA487940  Phacelia adenophora Arnold Tiehm, Jan Nachlinger, Margaret J. Williams 1988-6-2 11701 Lassen South side of Shaffer Mountain, 3.4 miles north of the Wendel road on Hwy 395 from Susanville to Alturas, west of the highway. 1387 Comment
  CDA418  Phacelia bicolor L. Ahart 2005-6-1 11866 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. 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
  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
  UC1537532  Phacelia hastata Gordon H. True 1936-6-27 566 Lassen Hot Spring Mountain 1676 Comment
  SD61076  Phacelia hastata Darley F. Howe 1964-8-1 3913 Lassen Modoc Natl. Forest. 4.8 mi. on Ridge above Harvey Creek. 2133 Comment
  NY1057241  Phacelia heterophylla N. H. Holmgren 1980-7-4 9503 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 Comment
  POM203779  Phacelia heterophylla subsp. virgata J. T. Howell 1934-7-10 12553 Lassen Black s Mt. Comment
  HSC30186  Phacelia humilis D. H. Norris, S. Dowty, T. Nelson 1971-6-22 19265 Lassen Harvey Valley near Cone Springs Comment
  JEPS118501  Phacelia humilis A. Holmen 2011-8-12 CA 320 -92 Lassen US Hwy 395 South to Termo. Turn East onto Lassen Co. Rd 508 (Juniper Ridge Rd). Continue approximately 11 miles to Cold Springs Rd and head north for 3 miles. Turn and travel about 1 mile. Collection site is along road. Comment
  JEPS2120  Phacelia humilis Franklin P. Nutting 1894-7-12 Lassen Pine Creek Comment
  UC1069416  Phacelia humilis A. Simontacchi 1940-5-17 751 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quadrangle 1699 Comment
  UC133087  Phacelia humilis T. S. Brandegee 1892-7-3 Lassen Susanville Comment
  UC773945  Phacelia humilis L. R. Short 1936-5-22 S- 351 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1836 Comment
  POM73344  Phacelia humilis var. humilis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 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
  CHSC48470  Phacelia inundata Vernon Oswald 1986-6-15 2114 Lassen Near Eagle Lake Biological Station. 1584 Comment
  CHSC12417  Phacelia linearis Anne Linda Brisk 1969-6-25 20 Lassen Growing behind Shepherd's Hall at ELBS. 1554 Comment
  CHSC67059  Phacelia linearis Willis Ball 1969-6-28 55 Lassen Found on E.L.B.S. in dry basaltic soil. 1554 Comment
  UC699732  Phacelia linearis Farris Farris 1936-6-5 Lassen Susanville 1371 Comment
  UCR80208  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 mi. south of Ravendale. 1638 Comment
  RSA149122  Phacelia linearis I. L. Wiggins, Dorothy Wiggins 1961-6-16 16530 Lassen 0.8 mile west of summit of Big Valley Pass. Comment
  NY1056437  Phacelia lutea var. glandulifera A. A. Heller 1938-6-23 15210 Lassen U.S. Highway #395, about midway between Mapes and Secret Valley 1372 Comment
  SEINET5519007  Phacelia lutea var. glandulifera N. H. Holmgren, P. K. Holmgren 1978-6-11 8931 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
  NY1056439  Phacelia lutea var. glandulifera W. W. Eggleston 1911-7-7 7166 Lassen Secret Valley 1330 Comment
  UC1084101  Phacelia procera Rimo Bacigalupi with G. T. Robbins 1955-7-21 5433 Lassen along upper reaches of creek about 10 mi sw Susanville (along rd. over Diamond Mtn. ridge to Englemine and Indian Valley); Gold Run Creek 1767 Comment
  UC1483880  Phacelia ramosissima var. eremophila G. Schoolcraft 1979-6-26 94 Lassen on dunes located off Marr Road 1706 Comment
  CHSC59552  Phacelia ramosissima var. ramosissima M> Meyer 1980-7-8 514 Lassen Amongst rocks (lg.) and junipers on top of Grasshopper Ridge. 1724 Comment
  CAS-BOT-BC179912  Phacelia thermalis Peter H. Raven; Otto T. Solbrig 1958-6-17 13297 Lassen Hwy 395, 4.8 miles south of Madeline Comment
  SEINET3091880 Image available Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young. 1984-6-7 8595 Lassen Flats on the Northwest side of Shaffer Mountain, 9 air miles North-northwest of Litchfield. 1372 Comment
  CAS-BOT-BC265821  Phalaris arundinacea John Thomas Howell 1975-7-23 51402 Lassen Susanville, Sierra Nevada 1295 Comment
  JEPS28271  Phleum alpinum George W. Gillett 1957-7-29 950 Lassen along trail between Butte Lake and Snag Lake (Lassen Volcanic National Park); , btw Butte Lake and Snag Lake 1859 Comment
  UC60737  Phleum alpinum M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek 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
  UC1137650  Phlox douglasii subsp. rigida A. Simontacchi 1940-5-17 744 Lassen 5.7 mi ssw Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC1137715  Phlox douglasii subsp. rigida L. R. Short 1936-4-28 S- 332 Lassen Burgess Spring Experimental Range Lassen Forest 1737 Comment
  UC1124222  Phlox gracilis K. E. Bradshaw 1939-5-27 230 Lassen Black Mountain Experimental Forest, Plot 39-1, s end Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1609184  Phlox gracilis Vernon H. Oswald and Lowell Ahart 1993-5-12 5376 Lassen 3.5 mi nw A21 (to Westwood) (canal crossing Hwy 44, on the n side of the road and on the e side of the canal) 1729 Comment
  CHSC91334  Phlox stansburyi Lowell Ahart; John Dittes 2005-6-1 11846 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
  JEPS107929  Phlox stansburyi Lowell Ahart, John Dittes 2005-6-1 11846 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
  CDA40284  Phlox stansburyi T. C. Fuller 1963-6-11 10662 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  CHSC48338  Phoenicaulis cheiranthoides Vernon Oswald 1986-5-28 2061 Lassen Hwy 139 between Eagle Lake and Adin, 38.1 mi n of Susanville. 1645 Comment
  RSA126929  Phragmites australis H. S. Yates 1936-8-11 6063 Lassen Near Red Rock. 1341 Comment
  CDA33273  Phyllodoce breweri Margaret Bellue 1938-8-1 Lassen Lassen National Park: Bumpas Hell 0 Comment
  HSC101734  Pinus albicaulis Michael Kauffmann, Jeffrey Kane 2013-7-23 15 Lassen North-facing caldera 2360 Comment
  CHSC4886  Pinus contorta subsp. murrayana Bill Wilson 1967-7-15 204 Lassen Collected at the edge of Silver Lake, 20 mi. NW of Susanville. 1889 Comment
  UCR201593  Plagiobothrys Ken Osborne 2005-4-23 s.n. Lassen 3 miles SE of Honey Lake, 0.5 mile west of Turtle Mountain 1276 Comment
  UC1609179  Plagiobothrys cognatus Vernon H. Oswald and Lowell Ahart 1993-6-28 5626 Lassen e of Poison Lake (n of Hwy 44 along Rd 33N47 at ne end of Little Harvey Valley, on small branch of Pine Creek, between Champs Flat and Harvey Valley); Little Harvey Valley, Pine Creek 1737 Comment
  CDA42913  Plagiobothrys cusickii L. Ahart, John Dittes 2012-7-9 18284 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  SJSU8035  Plagiobothrys cusickii J. W. Tilden 1960-6-27 1518 Lassen 5 mi E of Westwood by Moonlight Rd 1524 Comment
  CAS-BOT-BC224968  Plagiobothrys hispidulus J. Burtt Davy 1897-6-17 3360 Lassen Adobe Meadows, Honey Lake Valley Comment
  CAS-BOT-BC224973  Plagiobothrys hispidulus John Thomas Howell 1934-7-10 12549 Lassen Long's [Longs] Well Comment
  CAS-BOT-BC224978  Plagiobothrys hispidulus Philip A. Munz 1947-5-20 11891 Lassen Milford 1264 Comment
  CHSC60334  Plagiobothrys hispidulus Mary Ann Showers 1992-6-12 2530 a Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  UC1025083  Plagiobothrys hispidulus Leo Whitney 1933-8-14 2002 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CAS-BOT-BC224970  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  CHSC110772  Plagiobothrys hispidus Dean Wm. Taylor 2012-7-18 21274 Lassen Pumice flat nestled in the cones about 2 miles South of the south end Poison Lake (along Highway 44). 1783 Comment
  CHSC59082  Plagiobothrys hispidus Vernon H. Oswald; Lowell Ahart 1992-8-25 5193 Lassen Lassen Volcanic National Park. West shore of Snag Lake SW of the islands. 1851 Comment
  CHSC71078  Plagiobothrys leptocladus Vernon H. Oswald; Lowell Ahart 1998-5-22 9099 Lassen Hackstaff Rd. 1.0 mi south of Laver Crossing Rd., 0.2 mi north of Fort Sage Rd., ca. 3 mi north of Doyle. On the bed of a vernal pool. 1316 Comment
  CAS-BOT-BC228467  Plagiobothrys mollis Peter H. Raven; Otto T. Solbrig 1958-6-17 13258 Lassen Near pond along Highway 395, 7.1 miles W of Standish Comment
  CAS-BOT-BC423310  Plagiobothrys mollis var. mollis Mary Merello; H. H. Schmidt; L. Woodruff 1993-6-28 751 Lassen Lassen National Forest, Poison Lake. Along Hwy. 44 just south of the Hwy. 89, Hwy. 44 intersection. 1700 Comment
  CHSC99536  Plagiobothrys mollis var. mollis Lowell Ahart; John Dittes 2008-6-20 14921 Lassen In vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS119646  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2012-7-9 18283 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC112445  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18771 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117214  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2016-6-7 20978 Lassen Strand 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
  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
  CHSC91317  Plagiobothrys tenellus Lowell Ahart; John Dittes 2005-6-1 11883 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction. 1438 Comment
  UC101433  Plagiobothrys tenellus Marcus E. Jones, A. M. 1897-6-18 7141 Lassen Chat 1524 Comment
  CAS-BOT-BC136632  Platanthera A. M. Vollmer; L. Beane 1953-7-1 74 Lassen Field redacted by CAS, contact the data manager for more information 1554 Comment
  CHSC30564  Platanthera leucostachys Sori H. Shad 1970-6-19 21 Lassen Above and east of Galatin Beach. 1524 Comment
  CHSC4942  Plectritis macrocera W. Lessig 1967-5-23 16 Lassen Coll. ca. 200 yds. ne of Eagle Lake Biology Station. 1524 Comment
  CHSC99738  Plectritis macrocera Lowell Ahart; John Dittes 2008-6-20 14971 Lassen About 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  JEPS118449  Plectritis macrocera Lowell Ahart, John Dittes 2011-6-20 17494 Lassen Meadow, 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
  UC100821  Plectritis macrocera unknown 1890-1 Lassen Milford Comment
  RSA788671  Pleiacanthus spinosus J. R. Shevock, Barbara Ertter 1986-7-20 11738 Lassen Along U.S. highway 395 at Red Rock Road. 1500 Comment
  CAS-BOT-BC254942  Poa bulbosa John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49187 Lassen Elysian Valley NW of Janesville 1325 Comment
  CHSC108013  Poa bulbosa Lowell Ahart; John Dittes 2011-6-20 17495 Lassen About 40 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
  UC1100399  Poa bulbosa Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 758 Lassen on Great Northern RR, Hwy 299 <Nubeiber> Comment
  UCD90699  Poa bulbosa S. Galen Smith; Malcolm A. Nobs, Herbert L. Mason 1949-5-29 758 Lassen on Great Northern Railroad, Highway 299, Nubeiber. Comment
  UCD90889  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen northeastern part of county. Long Valley, 6 miles southeast of Jess Valley, southern Warner Mountains. 2133 Comment
  UCD90921  Poa cusickii L. D. Whitney 1935-6-26 s.n. Lassen Near Fruit Grower's Supply Co., Camp 10. Comment
  CHSC77269  Poa cusickii subsp. cusickii G. Schoolcraft 1994-7-7 2351 Lassen About 1.5 miles NE of Red Rock Lake. 2042 Comment
  UC1024913  Poa cusickii subsp. cusickii Leo Whitney 1935-6-26 3369 Lassen meadow near Fruit Grower's Supply Company Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  HSC95280  Poa leptocoma subsp. leptocoma Gordon Leppig 1998-7-12 944 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  UC589886  Poa palustris H. S. Yates 1936-8-12 6079 Lassen McKenzie Meadow; Susanville Quadrangle 1524 Comment
  CAS-BOT-BC247320  Poa pratensis Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16337 -A Lassen 13.5 mi. E. of Susanville Comment
  RSA715619  Poa pratensis L. Ahart, John Dittes 2005-6-1 11848 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
  CHSC91319  Poa pratensis subsp. pratensis Lowell Ahart; John Dittes 2005-6-1 11848 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
  UCD90322  Poa secunda A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3365 Lassen Nubieber. Comment
  UCR119165  Poa secunda Beecher Crampton 1954-7-5 2057 Lassen Modoc Plateau, 4.5 miles west of Susanville, along state highway 36 1433 Comment
  CAS-BOT-BC247054  Poa secunda subsp. juncifolia Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  UC1136986  Poa secunda subsp. juncifolia L. R. Short and D. Gish 1936-6-5 S- 373 Lassen Burgess Spring Experimental Range; Lassen Forest 1798 Comment
  UCD92243  Poa secunda subsp. juncifolia Beecher Crampton 1960-6-18 5713 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD92428  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-26 3370 Lassen Lassen National Forest. Near Fruit Grower's Supply Co., Camp 10. Comment
  CHSC30521  Poa secunda subsp. secunda Sandra C. Morey 1980-4-26 78 Lassen Hwy. 139, ca. 1.0 mi. s of jctn. with Hwy. 299. 1284 Comment
  UC1024681  Poa secunda subsp. secunda Leo Whitney 1934-7-10 2165 Lassen ca 14 mi w Eagle Lake (near Harvey Spring); Lassen Nat'l Forest, Harvey Valley 1737 Comment
  UC1024813  Poa secunda subsp. secunda Leo Whitney 1935-6-19 3266 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1132880  Poa secunda subsp. secunda A. Simontacchi 1940-5-17 734 Lassen 5.7 mi ssw Patterson Mt; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC506987  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 F- 219 Lassen Lassen Nat'l Forest 1722 Comment
  UC70684  Poa secunda subsp. secunda J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  UCD90487  Poa secunda subsp. secunda A. A. Beetle 1941-6-28 2797 Lassen 10 miles W of Chester. 1524 Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  UC773972  Poa wheeleri L. R. Short 1936-4-28 S- 340 Lassen Burgess Spring Experiment Range; Lassen Forest 1767 Comment
  UCD91756  Poa wheeleri L. Whitney 1935-6-23 s.n. Lassen Fruit Grower's Supply Co., Camp 10. Comment
  UC1609361  Pogogyne floribunda Vernon H. Oswald and Lowell Ahart 1993-7-8 5669 Lassen ca. 5.4 mi. (air) n.w. Poison Lake (Halls Flat Rd. (33N18), 1.4 mi. s.-s.w. of Pittville Rd. (Lassen 111, 36N01), w. side of rd.) 1694 Comment
  CHSC7768  Polemonium micranthum Beverly J. Wise 1969-4-20 92 Lassen 13.2 mi. East of Susanville on Las. Co. Rd. 215. 1463 Comment
  UC907836  Polemonium micranthum John Chattin, Dan Tillotson 1947-5-1 1 Lassen Bieber Comment
  CDA40272  Polemonium micranthum Lee Wheeler 1960-4-13 3941 Lassen At the fairgrounds, Susanville. 0 Comment
  CHSC96705  Polemonium occidentale Gordon Leppig 1998-7-12 949 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  NY182333  Polyctenium fremontii H. D. D. Ripley 1944-5-30 5970 Lassen South of Ravensdale. 1691.6 Comment
  RSA0065537  Polyctenium fremontii M. P. Harthill 1971-6-21 215 Lassen Susanville. Comment
  CHSC68619  Polyctenium fremontii var. fremontii Vernon H. Oswald; Lowell Ahart 1997-5-7 8405 Lassen Mud Flat along Smoke Creek Ranch Rd. 1.7 mi east of Hwy. 395. 1356 Comment
  CDA2771  Polygonum arenastrum T. C. Fuller 1959-7-7 4731 Lassen Lee Wheeler property, 3 miles south of Susanville. 0 Comment
  CHSC112447  Polygonum aviculare subsp. depressum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18735 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
  POM104627  Polygonum bistortoides Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  POM253247  Polygonum bistortoides A. A. Heller 1938-6-23 15141 Lassen 2 miles E of Westwood Comment
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Jun 1 2009
  UC1136193  Polygonum bistortoides A. Simontacchi 1940-5-17 741 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC849110  Polygonum bistortoides A. A. Heller 1938-6-23 15141 Lassen 2 mi e Westwood Comment
  UC465777  Polygonum californicum T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CAS-BOT-BC414491  Polygonum douglasii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50683 Lassen Slope south and southeast of Diamond Mt. 2286 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
  UC1143031  Polygonum douglasii subsp. spergulariiforme L. R. Short 1936-9-30 S- 501 Lassen Burgess Spring Experimental Range Lassen National Forest 1767 Comment
  UC6681  Polygonum douglasii subsp. spergulariiforme M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  UC1603213  Polygonum polygaloides J. Guardino 1993-5-22 167 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  JEPS96123  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald and Lowell Ahart 1996-6-24 7856 Lassen ca. 0.5 mi e Eagle Lake Rd. (A1) (2.5 mi s of Eagle Lake, ca. 0.3 mi s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  RSA0045637  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
  UC1137591  Polygonum polygaloides subsp. confertiflorum A. Simontacchi 1940-6-15 875 Lassen 6.4 mi wnw Cone Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1191311  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason Jul 29 1955-Jul 31 1955 14639 Lassen Pine Creek Flat Comment
  UC1258489  Polygonum polygaloides subsp. confertiflorum G. Schoolcraft 1980-7-10 299 Lassen along Rice Canyon Rd in grazing enclosure Bureau of Land Management 1548 Comment
  UC1609321  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald and Lowell Ahart 1993-6-28 5593 Lassen Harvey Valley Rd (33N02) 1.7 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1719 Comment
  CHSC29856  Polygonum polygaloides subsp. kelloggii Robin L. Ondricek 1978-7-5 81 Lassen In grass and among trees along the ne edge of Mahogany Lake. 2057 Comment
  RSA122845  Polygonum sawatchense L. R. Short 1936-5-22 6025 Lassen Burgess Spring, Exp Range. 1837 Comment
  JEPS51302  Polygonum sawatchense subsp. oblivium Brown and Wieslander 1922-7-23 54 Lassen Martin Sprs. Eagle Lake Comment
  JEPS70696  Polypogon monspeliensis W. L. Jepson 1918-8-2 7771 Lassen Beckwith Pass 1463 Comment
  RSA129377  Polypogon monspeliensis H. S. Yates 1936-8-11 6054 Lassen Near Red Rock. 1341 Comment
  CHSC13799  Populus tremuloides Cathy Crittenden 1970-7-9 41 Lassen Antelope lookout. 2316 Comment
  CAS-BOT-BC105617  Populus trichocarpa John Thomas Howell; Gordon H. True 1973-8-1 50148 Lassen Gold Run Creek Road south of Susan ville, Diamond Range - Sierra Nevada 1584 Comment
  CHSC71386  Porterella carnosula V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9259 Lassen Moll Reservoir in Ash Valley southeast of Adin. 1615 Comment
  CHSC99731  Porterella carnosula Lowell Ahart; John Dittes 2008-6-20 14963 Lassen Edge of vernal pools, about 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  JEPS17746  Porterella carnosula Rimo Bacigalupi with G. T. Robbins 1955-7-20 5408 Lassen 4.4 mi s Patterson Ranger Station (Long Valley, southern end of Warner Mts., Modoc National Forest); Modoc National Forest, s end of Warner Mts. 2057 Comment
  SEINET3795835 Image available Porterella carnosula Noel H. Holmgren, Patricia K. Holmgren 1978-6-10 8901 Lassen Madeline Plains, Coyote Flat, 14.5 KM (9 mi) ENE of Termo and 13 km (8 mi) airline deistance 1631 Comment
  UC1112248  Porterella carnosula R. C. Bacigalupi with S. Galen Smith 1957-6-28 6023 Lassen Highway 395 in Madeline Plains 3.1 mi s Madeline; Madeline Plains 1615 Comment
  UC130334  Porterella carnosula M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  UC1573183  Porterella carnosula Dean Wm. Taylor with Glenn L. Clifton, Rexford E. Palmer and Roy Buck 1988-6-6 9007 Lassen road from Bieber to Lookout 0.5 mi s Modoc County Line (Big Valley, Pit River Watershed); Pit River Watershed, Big Valley 1249 Comment
  UC195849  Porterella carnosula Franklin P. Nutting Lassen flat near Eagle Lake; near Eagle Lake Comment
  SEINET10460824  Porterella carnosula Peter H. Raven 1958-6-17 Raven 13294 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline Comment
  SEINET10460834  Porterella carnosula Rimo Bacigalupi 1955-7-20 Bacigalupi 5408 Lassen Drying clay-loam mud at edges of pool at low spot in Long Valley, 4.4 miles south of Patterson Ranger Station, Modoc National Forest, southern end of Warner Mts. 2057 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
  CHSC4838  Potamogeton R. Carter 1967-7-13 595 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  CHSC4850  Potamogeton R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  JEPS97315  Potamogeton amplifolius Vernon H. Oswald 1995-8-26 7218 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Lake in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  UCD138219  Potamogeton amplifolius Gordon Leppig 1998-8-18 1064 Lassen Modoc National Forest; Blue Lake. Lake shore south of camp ground. 1859 Comment
  UC1609364  Potamogeton diversifolius Vernon H. Oswald and Lowell Ahart 1993-7-8 5666 Lassen ne edge of Poison Lake (2.4 mi n of Hwy 44, Pittville Road (Lassen 111, 36N01)) 1705 Comment
  JEPS97332  Potamogeton filiformis Vernon H. Oswald 1995-8-26 7219 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Lake in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  SEINET10704662  Potamogeton natans Karen M. Meyer, Andrew Townesmith 2007-7-21 Meyer 146 Lassen Lassen National Forest. 1.3 mi. on Road 10 to Silver Lake off Road 110. 1963 Comment
  HSC17771  Potamogeton natans Fred J. Kindel 1955-7-14 Lassen Mt. Meadows Reservoir Comment
  CHSC55814  Potamogeton richardsonii Vernon H. Oswald 1991-9-23 4876 Lassen Lassen Volcanic National Park. Butte Lake in the northeast corner of the park. At the first spit of land extending into the lake south of its outlet. 1841 Comment
  UCR228123  Potamogeton richardsonii R. F. Thorne, Larry E. DeBuhr 1975-8-22 47200 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
  POM118839  Potamogeton zosteriformis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  JEPS100240  Potentilla basaltica Dean Wm. Taylor with Glenn Clifton 1990-6-12 10882 Lassen Ash Valley, along Ash Creek, at the crossing of Road 527 (Forest Road 39N08) 1554 Comment
  OBI77552  Potentilla biennis Anthony Baniaga 2011-7-23 460 Lassen Lassen Natl Forest. Poison Lake. Poison Lake quad. T32N R7E sec 4 1700 Comment
  SDSU9114  Potentilla biennis D. F. Howe 1964-7-31 3901 Lassen Parsnip Creek, Warner Mtns, Modoc National Forest. 1829 Comment
  CHSC5048  Potentilla gracilis var. fastigiata L. B. Barlow 1967-7-1 80 Lassen 2 mi. west Murrer's Ranch turnoff, 14.9 mi. north of Susanville, Highway 139. 1463 Comment
  RSA0035409  Potentilla gracilis var. fastigiata Lowell Ahart, John Dittes 2008-6-20 14954 Lassen About 200 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
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  CAS-BOT-BC158518  Potentilla millefolia John Thomas Howell 1934-7-6 12456 Lassen Harvey Valley Comment
  CHSC5003  Potentilla millefolia K. C. Newman 1967-7-14 87 Lassen Collected in meadow along SH 44 about 15 mi. from the junction of SH 36 going toward Redding. 1828 Comment
  UC1128271  Potentilla millefolia A. Simontacchi 1940-5-17 743 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  JEPS103180  Potentilla rivalis G. Schoolcraft 2000-6-13 2902 Lassen Cold Spring Valley 1645 Comment
  NY833598  Potentilla rivalis var. millegrana G. Schoolcraft 2000-6-13 2902 Lassen Cold Spring Valley 1646 Comment
  CHSC75533  Poteridium annuum Vernon H. Oswald; Lowell Ahart 1999-6-9 9760 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass. Roadside. 1645 Comment
  CAS-BOT-BC159777  Prunus andersonii R. F. Thorne; C. W. Tilforth 1969-9-6 39252 Lassen Beckwourth Pass, Plumas-Lassen Co. line county 1589 Comment
  CAS-BOT-BC159780  Prunus andersonii M. S. Taylor 1982-5-7 4424 Lassen Reno Junction and along old road paralleling Hwy 70 just e of Beckwourth Pass 1524 Comment
  CHSC106567  Prunus andersonii K. Schierenbeck 2008-5-3 Lassen Fort Sage Mtns. 1439 Comment
  RSA60357  Prunus andersonii E. K. Balls 1950-5-9 15947 Lassen 6 miles south of Doyle, Hwy 395. 1372 Comment
  SJSU14477  Prunus andersonii W. D. Pitts 1990-5-29 297 Lassen by Hwy 395, 5 mi N of Doyle 1310 Comment
  UC1128289  Prunus andersonii E. Sawyer 1935-6-27 227 Lassen Long Valley 1310 Comment
  SEINET10483438  Prunus andersonii Mary Susan Taylor 1982-5-7 Taylor 4424 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
  CAS-BOT-BC154773  Prunus virginiana var. demissa John Thomas Howell 1974-7-8 50494 Lassen Susanville 1295 Comment
  CHSC23560  Prunus virginiana var. demissa W. O. Baum 1971-7-6 34 Lassen At top of s slope on Gallatin Peak. 2103 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
  UC2013400  Prunus virginiana var. demissa Debra Valov 2011-6-16 1105 Lassen Bieber; off County A2 c. 8 km east of Highway 299. Comment
  CAS-BOT-BC357283  Pseudognaphalium microcephalum John Thomas Howell; Gordon H. True 1973-8-1 50155 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC239797  Pseudoroegneria spicata John Thomas Howell 1934-6-14 12166 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC239801  Pseudoroegneria spicata John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50693 Lassen South and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC239805  Pseudoroegneria spicata David D. Keck 1944-7-8 5450 Lassen 1.5 mi. W. of Susanville on rime of plateau overlooking Susan River Canyon 1341 Comment
  UCD91511  Pseudoroegneria spicata August L. Hormay 1929-6-1 s.n. Lassen Susanville Forest Office. 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
  JEPS97412  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald and L. Ahart 1995-6-19 6897 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
  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
  HSC22982  Pterospora andromedea John Pratt 1970-7-10 70 Lassen 1524 Comment
  CHSC77267  Puccinellia distans G. Schoolcraft 1993-6-1 2270 Lassen Coyote Spring. 1463 Comment
  UCD91531  Puccinellia distans Beecher Crampton 1964-6-27 7098 Lassen Lassen County, ca. 8 miles S.E. of Ravendale, BLM Spanish Springs -- Shinn Mtns. Resource Conservation area. 1981 Comment
  UCD91890  Puccinellia lemmonii Freed W. Hoffman 1946-5-28 1820 Lassen Beiber. Comment
  RSA647519  Puccinellia nuttalliana Marion P. Harthill 1972-6-17 801 Lassen Standish. Comment
  UCR244041  Puccinellia nuttalliana Jim Andre 1993-6-1 19711 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CHSC13644  Purshia tridentata M. S. Taylor 1974-6-25 260 Lassen Surrounding meadow, ca. 2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  UCD113288  Purshia tridentata G. L. Webster 1989-5-13 7715 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  SEINET10542488  Purshia tridentata Jeffrey Huber 1971-6-11 Huber 338 Lassen 6 miles w of susanville, on calif. Hwy 36, volcanic soil, pinus ponderosa Forest 1615 Comment
  SEINET3394464  Purshia tridentata E. D. McArthur 1982-1 EDM- 1356 Lassen NW of Janesville at Jct of crossroads 205 & 219 Comment
  RSA647526  Purshia tridentata var. tridentata Marion P. Harthill 1972-6-17 814 Lassen Ravendale 1768 Comment
  UC1137302  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-BC462881  Pyrola asarifolia George W. Gillett 1957-7-24 900 Lassen Lassen Volcanic National Park: Cameron Meadow 1950 Comment
  SEINET178134  Pyrola picta Marcus E. Jones 1897-6-28 Lassen Diamond Mt. Susancille, Perkins R. 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
  CAS-BOT-BC362263  Pyrrocoma carthamoides var. cusickii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50695 Lassen Steep rocky slope south and southeast of Diamond Mt. 2286 Comment
  JEPS19176  Pyrrocoma hirta var. lanulosa Leland S. Smith 1922-1 18 Lassen Windmill flat, nw Lassen County Modoc National Forest Comment
  UC1143034  Pyrrocoma hirta var. lanulosa L. R. Short and J. Warren 1936-8-17 S- 496 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1783 Comment
  CAS-BOT-BC362273  Pyrrocoma lanceolata var. lanceolata James Jokerst 1983-7-24 1881 Lassen Near Madeline Plains 1614 Comment
  CDA8517  Pyrrocoma lanceolata var. lanceolata T. C. Fuller 1980-8-6 20315 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  JEPS100333  Pyrrocoma lucida Dean W. Taylor 2001-7-19 17838 Lassen meadow 0.5 air mi S of Doyle Grade, along private road in rural residential area Feather River Watershed 1859 Comment
  CAS-BOT-BC362319  Pyrrocoma racemosa var. paniculata John Thomas Howell 1951-8-20 28227 Lassen Honey Lake Valley near Herlong 1280 Comment
  CAS-BOT-BC105245  Quercus kelloggii John Thomas Howell 1973-7-10 49788 Lassen 3 miles W of Susanville 1371 Comment
  CAS-BOT-BC105247  Quercus kelloggii John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49159 Lassen Elysian Valley NW of Janesville 1325 Comment
  LA205323  Quercus kelloggii Carl Epling; William Robison 1935-7-15 sn Lassen near Honey Lake Comment
  UCD46622  Quercus kelloggii John Thomas Howell 1973-7-10 49788 Lassen 3 miles west of Susanville. 1371 Comment
  CHSC6244  Ranunculus alismifolius var. hartwegii R. Gein 1946-6-11 Lassen Eagle Lake. 1580 Comment
  UC584357  Ranunculus andersonii G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2270 Lassen bare summit ridge and ridges sw Diamond Mt. (s of Susanville) Comment
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Apr 20 2009
  CAS-BOT-BC334481  Ranunculus aquatilis var. capillaceus R. F. Thorne; Larry E. DeBuhr 1975-8-22 46981 Lassen Along Hwy 395 ca 6 miles N of Madeline and 4.5 miles S of Modoc county line. 1616 Comment
  UC1101365  Ranunculus aquatilis var. capillaceus Verne Grant and Irving Schneider 1947-7-30 8197 Lassen Tule Lake; w end 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
  JEPS121299  Ranunculus aquatilis var. diffusus Lowell Ahart, John Dittes 2013-7-23 18891 Lassen Margins of a man-made pond, about 150 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA152633  Ranunculus aquatilis var. hispidulus I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16347 Lassen In shallow stream about 10 miles E of Susanville Comment
  CHSC59807  Ranunculus cymbalaria var. saximontanus Mary Meyer; Teresa Prendusi 1980-5-8 Lassen Near the creek in Balls Canyon. 1341 Comment
  OBI75893  Ranunculus flammula Anthony Baniaga 2011-8-17 504 Lassen Lassen Natl Forest. Unnamed ephemeral pool, E of Silver Bowl Camp. Bogard Buttes quad. T31N R7E sec 35 SW of SE 1978 Comment
  CHSC60612  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
  CHSC67295  Ranunculus glaberrimus James D. Jokerst 1991-5-29 3313 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
  UC1136880  Ranunculus glaberrimus L. R. Short 1936-4-28 S- 338 Lassen Burgess Spr. Exp. Range Lassen National Forest 1737 Comment
  UC1126216  Ranunculus occidentalis A. Simontacchi 1940-6-13 850 Lassen 3.3 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC91186  Ranunculus occidentalis var. occidentalis Lowell Ahart; John Dittes 2005-6-1 11857 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
  NY494893  Ranunculus sceleratus N. H. Holmgren 1978-6-11 8916 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  UC1191443  Ranunculus sceleratus Malcolm A. Nobs and S. Galen Smith 1949-7-21 1050 Lassen marshy creek ca 1 mi e Madeline 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
  RSA747549  Rhamnus rubra K. M. Meyer, A. Townesmith 2007-7-23 156 Lassen Lassen National Forest. 5.6 miles SW on 32N10 off Hwy 44. (Turn at rest area). 1980 Comment
  CAS-BOT-BC92389  Ribes aureum var. aureum Doris K. Kildale 1930-5-12 9358 Lassen Between Susanville and Leavitt Lake. Comment
  CAS-BOT-BC93388  Ribes cereum Barbara Shervanick 1974-5-8 1272 Lassen Eagle Lake Road, on the west side of Eagle Lake, about 18 miles north of SR 36. Eagle Lake drainage area. Cascades. 1584 Comment
  CAS-BOT-BC93391  Ribes cereum Keith Wagnon; James Vale; Walter Knight; Irja Knight 1981-5-24 4122 Lassen Near summit of grade at southeast end of Eagle Lake. Comment
  CHSC23566  Ribes cereum W. O. Baum 1971-6-28 40 Lassen E slope of Gallatin Peak at edge of fire trail. 1920 Comment
  UCR17254  Ribes cereum Frank C. Vasek 1975-7-11 750711- 18 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CHSC84861  Ribes cereum var. cereum L. P. Janeway; B. Castro 2003-10-5 8003 Lassen High Cascade Range. 3.6 km (air) southwest of Bogard Buttes; along Lassen National Forest road 32N09C 0.5 km north of road 32N09. 2020 Comment
  UC699688  Ribes hudsonianum var. petiolare J. L. Mielke, J. W. Kimmey 1941-6-29 Lassen Silver Creek (Lost Lake) Warner Mountains, Modoc National Forest Comment
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Jul 19 2010
  SEINET12216573  Ribes roezlii Unknown 1972-1 286 Lassen 1 mi S of Five Points on Dean's Ridge Rd going to Dean's Meadow Comment
  JEPS87425  Ribes velutinum Vernon H. Oswald and Lowell Ahart 1993-6-14 5547 Lassen ca 2.0 m ENE Spaulding Tract Rd. (Rd. 518,33N89) (dunes on n side of Eagle Lake Rd. (Lassen Al) at Sandy Beach on the W shore of lake); Eagle Lake 1566 Comment
  UC1523807  Ribes viscosissimum Gary Schoolcraft 1982-8-9 860 Lassen near Susanville; Diamond Mtn. 2011 Comment
  JEPS88202  Rigiopappus leptocladus Vernon H. Oswald and Lowell Ahart 1996-6-17 7795 Lassen s side of Bizz Johnson Trail just e Devils Corral Trailhead (trailhead located off Hwy 36 ca. 7 mi w of Susanville); Modoc Plateau 1420 Comment
  CAS-BOT-BC363008  Rigiopappus leptocladus unspecified 1940-5-31 s.n. Lassen E. of McArthur Comment
  SEINET3148575  Rigiopappus leptocladus L. S. Rose 1940-6-11 40507 Lassen 8 mi W of Nubieber 1219 Comment
  UC1126739  Rorippa curvisiliqua A. Simontacchi 1940-6-4 806 Lassen 14.8 mi w Harvey Mountain Lookout; Halls Flat Quad., Lassen National Forest Comment
  CDA25121  Rorippa nasturtium-aquaticum Gordon Leppig 1998-7-12 959 Lassen Northern California Peatlands; Modoc National Forest, Blue Lake Ranch. Comment
  CHSC30577  Rorippa nasturtium-aquaticum Sori H. Shad 1970-6-24 42 Lassen In upper Murrer's Meadow, in irrigation ditch. 1524 Comment
  CHSC5239  Rorippa nasturtium-aquaticum P. Balch 1955-7-10 Lassen Eagle Lake. Willow Creek Reservoir. 1463 Comment
  JEPS95970  Rorippa nasturtium-aquaticum Vernon H. Oswald and L. Ahart 1999-6-9 9736 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.3 mi west of Hwy. 395: T31N R15E NW1/4 Sect. 2, 4440 ft elevation, springy marsh surrounded by sagebrush scrub 1353 Comment
  CHSC117284  Rorippa palustris var. fernaldiana Lowell Ahart; John Dittes 2016-7-15 21218 Lassen Along a ditch west of the road, about 100 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  NY182185  Rorippa sinuata G. Schoolcraft 1983-6-28 1025 Lassen 1341.1 Comment
  UC1128595  Rosa bridgesii A. Simontacchi 1940-6-24 722 Lassen 6.4 miles S. W. of Jacks Lake Halls Flat Quad. 1950 Comment
  UCR17283  Rosa californica Frank C. Vasek 1975-7-11 750711- 22 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  CDA26287  Rosa woodsii var. ultramontana Gordon Leppig, T. LaBlanca 1998-7-13 874 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  JEPS114901  Rosa woodsii var. ultramontana Lowell Ahart, John Dittes 2008-6-20 14972 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
  JEPS45639  Rosa woodsii var. ultramontana W. L. Jepson 1918-8-3 7801 Lassen Honey Lake Valley 1219 Comment
  CAS-BOT-BC148360  Rubus leucodermis George W. Gillett 1957-7-26 914 Lassen Butte Lake - Lassen Volcanic National Park 1844 Comment
  UC1070543  Rumex H. S. Yates 1936-8-11 6057 Lassen near Red Rock; Sierraville Quad. 1341 Comment
  CHSC106088  Rumex acetosella Lowell Ahart; John Dittes 2010-7-31 17001 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
  CHSC117299  Rumex crispus Lowell Ahart; John Dittes 2016-7-13 21134 Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC452560  Rumex crispus Franklin P. Nutting Lassen near Lookout; Big Valley Comment
  UC748311  Rumex crispus Annie M. Alexander and Louise Kellogg 1946-8-11 5151 Lassen Madeline Comment
  CAS-BOT-BC433245  Rumex crispus Louella Bass 1973-6-15 EV- 108 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC433485  Rumex fueginus John Thomas Howell 1934-7-8 12485 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC433632  Rumex lacustris Peter H. Raven; Otto T. Solbrig 1958-6-17 13266 Lassen Along United States Highway 395, 11.8 miles north-east of Litchfield Comment
  CHSC65317  Rumex occidentalis Vernon H. Oswald 1995-8-21 7210 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. On the marshy edge of the lake. 1859 Comment
  UC1136917  Rumex paucifolius L. R. Short and B. Gish 1936-6-8 S- 387 Lassen Burgess Spr. Exp. Range Lassen Forest 1743 Comment
  UCR67452  Rumex salicifolius George K. Helmkamp 1990-9-23 G- 14 Lassen north of Ravendale 1677 Comment
  UC1036083  Rumex salicifolius var. lacustris Annie M. Alexander and Louise Kellogg 1946-8-11 5152 Lassen 4 to 6 mi s Madeline Comment
  UC1101218  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-8-1 8224 Lassen w end Section 19 (State Fish & Game nesting area); Madeline Plain 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
  CHSC71095  Rumex venosus Vernon Oswald; G. Schoolcraft, B. Corbin, M. Mini 1998-5-16 9086 Lassen About 1.5 mi southeast of Herlong along a dirt road on the north side of Long Valley Creek between Garnier Rd. and the RR. 1249 Comment
  RSA249402  Rumex venosus Thomas W. Nelson, S. Dowty 1971-7-22 19300 Lassen Along Hwy 395, about 4 miles east of Standish Comment
  SEINET8584738  Rumex venosus W. Harnach 2011-6-4 1247 Lassen NE slope of Turtle Mtn., Fort Sage Mtns., Honey Lake Valley, approx. 7.5 miles NE of Doyle, CA on the Fort Sage Road. 1329 Comment
  JEPS51078  Sagina saginoides Brown and Wieslander 1922-7-30 45 Lassen Eagle Lake, Martin Springs Comment
  UC568  Sagittaria State Geological Survey 1800-1 2189 Lassen Comment
  CHSC13691  Sagittaria cuneata Patrick Balch 1935-7-17 Lassen Willow Creek Springs. Comment
  CHSC66737  Sagittaria cuneata Vernon H. Oswald; Lowell Ahart 1996-8-1 8107 Lassen Mountain Meadows Reservoir SW of Westwood. On the receding shore of the reservoir NE of Indian Ole Dam. 1539 Comment
  UC1609489  Sagittaria cuneata Vernon H. Oswald and Lowell Ahart 1993-8-3 5753 Lassen n edge Cooper Swamp Cooper Swamp (e of Silver Lake just e of the Caribou Wilderness, ca 13 mi (air) n of Lake Almanor); e of Caribou Wilderness, , e of Silver La 1932 Comment
  UC935793  Sagittaria cuneata Calvin McMillan and Malcolm A. Nobs 1949-6-15 785 Lassen Nubieber Comment
  CAS-BOT-BC445707  Sagittaria latifolia B. Anthony 1967-7-8 s.n. Lassen Murrer's Meadow, ca 3 mi. from Eagle Lake Biological Station 1493 Comment
  UCD149941  Sagittaria latifolia William Anderson 1963-6-21 s.n. Lassen Honey Lake Valley. Comment
  CHSC65120  Salix eastwoodiae Vernon H. Oswald; Lowell Ahart 1995-7-24 7140 Lassen 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
  JEPS107968  Salix jepsonii Lowell Ahart, John Dittes 2005-6-2 11947 Lassen Long Valley, along a small stream, about 1 1/2 miles (air) northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  NY430479  Salix laevigata G. Schoolcraft 1994-8-2 2413 Lassen About 1.5 miles southwest of Boot Lake 2011.7 Comment
  CAS-BOT-BC128126  Salix lasiandra var. lasiandra G. Schoolcraft 1999-5-7 2821 Lassen Susanville, along BJ Trail near 4 mi. marker. 1371 Comment
  SEINET11987291  Salix lutea J. Vale, Wagnon, K.; Knight, W.; Knight, I. 1981-1 4121 Lassen Willow Creek Campground on road between adin and Said Valley Reservoir Comment
  POM107066  Salix melanopsis Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC126174  Salix scouleriana Hans Leschke 1964-9-3 1891 Lassen Cinder Cone, Lassen Volcanic Nat. Park Comment
  UC1191402  Salsola tragus Verne Grant and Irving Schneider 1947-7-19 8080 Lassen s. of Alutras (in Pit Valley, Williams Ranch, along Southern Pacific right-of-way); Pit Valley, Williams Ranch Comment
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Jun 24 2009
  CDA5749  Salvia aethiopis Margaret Bellue Jul 1949 Lassen Susanville. 0 Comment
  CHSC42206  Salvia dorrii C. E. Laver 1985-6-1 Lassen Ca. 5.5 mi ne of Litchfield and 5 mi nw of Wendel. 1371 Comment
  HSC27359  Salvia dorrii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19296 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  CDA40944  Salvia dorrii subsp. dorrii Vernon H. Oswald & Lowell Ahart 1998-6-4 9145 Lassen Spur road on north side of Red Rock Road, 0.6 mile east of Highway 395, south of Constantia. Comment
  SEINET201595  Salvia dorrii var. dorrii Arthur Cronquist, Arthur H. Holmgren 1959-6-17 8462 Lassen 50 miles southeast of Susanville. Comment
  CAS-BOT-BC214312  Salvia dorrii var. pilosa P. Monnet 1915-7-1 815 Lassen Hot Springs Peak 182 Comment
  JEPS5934  Sambucus racemosa var. microbotrys Frances D. Payne 1929-7-12 80 Lassen Lost Lake Warner Mountains (se extremity of mts.) 2286 Comment
  POM83011  Sanicula graveolens Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  CAS-BOT-BC110335  Sarcobatus vermiculatus John Thomas Howell 1975-7-23 51414 Lassen Sierra Nevada. On Highway 395 about 5 miles southeast of Doyle. 1310 Comment
  CAS-BOT-BC110337  Sarcobatus vermiculatus John Thomas Howell 1934-6-10 11897 Lassen Horse Lake. Comment
  CHSC64783  Sarcobatus vermiculatus Vernon H. Oswald 1995-5-24 6775 Lassen Modoc Plateau. Wendel Rd. (Lassen 320), 0.4 mi e of the e end of Amedee Rd. (6.1 mi e of Wendel). 1219 Comment
  UCD54536  Sarcobatus vermiculatus Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2721 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1247 Comment
  SEINET10532872  Sarcobatus vermiculatus Mary Susan Taylor 1982-6-12 Taylor 4650 Lassen 4010 ft. T28N R14E se sec 3. Standish quad. Alkali flats in Hartson Lake Refuge, 1 mi n of Hartson Lake on n side of Honey Lake, ca. 13 mi se of Susanville. 1222 Comment
  CHSC4601  Sarcodes sanguinea R. Ogren 1967-7-8 1 Lassen Papoose Valley, 2 mi S of Gallatin Beach, Eagle Lake. 1524 Comment
  HSC17990  Sarcodes sanguinea M. S. Baker 1890-3 Lassen Honey Lake Valley Comment
  CAS-BOT-BC466320  Sarcodes sanguinea R. Carter 1967-6-22 536 Lassen 1/4 mi S of Corners on Peans Ridge Rd., on way to Mahogany Lake 1950 Comment
  UC1037239  Saxifraga aprica Leo Whitney 1935-6-11 3227 Lassen Camp 10, Fruit Grower's Supply Company Camp 10; Lassen National Forest, Fruit Grower's Supply Company Comment
  JEPS1765  Saxifraga nidifica var. nidifica Milo S. Baker 1952-5-23 12422 Lassen e of Chester (Hwy 36) Comment
  JEPS47551  Saxifraga oregana Milo S. Baker 1894-7-9 Lassen Pine Creek Comment
  CAS-BOT-BC111301  Schoenoplectus acutus var. occidentalis Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-8-20 1487 Lassen Long Creek, 1 mile south of Doyle Comment
  RSA719709  Schoenoplectus pungens Michael A. Vincent, K. Levings 2006-7-29 12919 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. Comment
  UC1100752  Scirpus acutus var. occidentalis Malcolm A. Nobs, S. Galen Smith 1949-8-20 1487 Lassen 1 mi s Doyle; Long Creek, s of Doyle 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
  UC2166  Scirpus nevadensis J. Burtt Davy Jun 17 1897-Jun 24 1897 3311 Lassen Amedee Honey Lake Valley, Amedee Comment
  SEINET6727388  Sclerolinon digynum J. T. Howell, G. H. True., Jr. 1973-6-28 49490 Lassen Sierra Nevada, Elysian Valley 1326 Comment
  CAS-BOT-BC240003  Scribneria bolanderi Malcom A. Nobs; S. Galen Smith; Herbert L. Mason 1949-5-29 759 Lassen On Great Northern Railroad, Highway 299, Nubeiber Comment
  UCD92528  Scribneria bolanderi Malcolm A. Nobs; S. Galen Smith, Herbert L. Mason 1949-5-29 759 Lassen on Great Northern Railroad, Highway 299, Nubeiber. Comment
  HSC82199  Scutellaria nana Thomas W. Nelson, Jane P. Nelson 1980-7-6 6054 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  RSA488564  Scutellaria nana Arnold Tiehm, Raymond Evans, James Young 1984-6-7 8591 Lassen Flats on the northwest side of Schaffer Mountain, 7.5 air miles north-northwest of Litchfield 1372 Comment
  UC726647  Scutellaria nana A. A. Heller 1938-6-23 15186 Lassen 1 mi s of Westwood 1524 Comment
  CDA2409  Secale cereale T. C. Fuller 1969-5-22 18481 Lassen Northeast corner of Rair Drive & Main Street, Susanville. 0 Comment
  RSA647520  Secale cereale Marion P. Harthill 1972-6-16 788 Lassen Doyle 1372 Comment
  SEINET10517203  Secale cereale Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 887 Lassen Collected 3 mi N of Milford. On Hwy 395 at Honey Lake Campgrounds. Comment
  RSA0076359  Sedum lanceolatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC11232  Sedum stenopetalum M. S. Baker and Frank Nutting 1894-7-7 Lassen Harvey's Ranch Comment
  CAS-BOT-BC363324  Senecio aronicoides Alice Eastwood 1912-8-22 1819 Lassen Foot of Lassen Butte, Lassen Butte Region Comment
  CAS-BOT-BC363326  Senecio aronicoides A. A. Heller 1938-6-4 15143 Lassen West of Fredonyer Pass 1676 Comment
  RSA516346  Senecio canus Barbara Ertter, Gary Schoolcraft 1987-6-16 7194 Lassen Skeedaddle Mountains on NE side of Honey Lake; saddle on E side of Hot Springs Peak. 2195 Comment
  CHSC54176  Senecio hydrophiloides Vernon H. Oswald 1991-5-28 4628 Lassen South end of Elkins Ln (100 ft south of Modoc-Lassen county line), Ash Creek Wildlife Area, ca. 7 miles northeast of Bieber. Meadow. 1267 Comment
  JEPS17740  Senecio hydrophiloides Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5413 Lassen 4.4 mi s Patterson Ranger Station (in meadow e edge of Long Valley, s end of the Warner Mountains); Modoc National Forest, Warner Mountains, Long Valley 2057 Comment
  UC2027206  Senecio hydrophiloides Anthony Baniaga 2011-6-21 388 Lassen Lassen National Forest. Southern McCoy Flat. Spalding Tract quandrangle Comment
  CHSC7651  Senecio hydrophilus Beverley J. Wise 1969-5-9 28 Lassen 10.3 mi. east of Susanville on Forest Serv. 8246 off Hwy 36. 1554 Comment
  CHSC99108  Senecio hydrophilus Lowell Ahart; John Dittes 2008-6-20 14907 Lassen About 100 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
  CHSC23517  Senecio integerrimus var. exaltatus Wayne O. Baum 1971-6-28 71 -18 Lassen E. slope of Gallatin Peak. 1920 Comment
  CHSC60723  Senecio integerrimus var. exaltatus Vernon H. Oswald; Lowell Ahart 1993-6-3 5480 Lassen Champs Flat Rd. (Lassen 105, 32N28Y), where it diverges from Lassen 21 (32N02) to Eagle Lake, on the S side of Pine Creek Valley, between Poison Lake and Susanville. Meadow. 1725 Comment
  UC1070219  Senecio integerrimus var. exaltatus K. E. Bradshaw 1939-5-27 239 Lassen Black Mountain Experimental Forest, Plot 39-1 Lassen National Forest, Halls Flat Quad. 1767 Comment
  SFV10993  Senecio serra J. Turner, F. M. Ball (1192) 1962-7-13 s. n. Lassen Laufman Public Camp, 3 miles off Highway 395 from Milford near Honey Lake. 1494 Comment
  UC1562580  Senecio triangularis Barbara Ertter 1988-7-25 7870 Lassen ridge of mts. ca 1.5 mi e Diamond Peak (ca 10 airmiles due s of Susanville); Diamond Mts. 2255 Comment
  UC36171  Senecio triangularis M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  SEINET10788334  Setaria viridis Lowell Ahart 2010-8-31 Ahart 17139 Lassen T39N, R8E, southwest 1/4 section 35. About 1/4 of a plant, on damp good soil, moisture from irrigation, on the east side of Walters Road, 4235 feet south of Modoc County line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. Common. 1277 Comment
  CHSC100133  Shepherdia argentea L. P. Janeway 2008-8-2 9526 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Tanch Road 1.8 km west of the CA-NV line. 1349 Comment
  UC585099  Sidalcea glaucescens E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1778 Lassen 4 mi s Ravendale (slope of creek at n end of Secret Valley); n end Secret Valley, s of Ravendale 1371 Comment
  UCR18792  Sidalcea glaucescens Frank C. Vasek 1975-7-11 750711- 33 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  SBBG128040  Sidalcea glaucescens L. Ahart, J. Dittes 2010-7-31 17016 Lassen S side of the rd, ca. 50 yards E of the large culvert, where the rd crosses Hunsinger Draw, 1.9 mi NW of Moll Reservoir, 2.8 mi W of Ash Valley, 8.4 mi SE of Adin 1516 Comment
  UC506975  Sidalcea oregana subsp. oregana George A. Fischer, Irwin H. Johnson 1933-7-12 F- 227 Lassen Lassen Forest , Patterson Flat 1737 Comment
  RSA25322  Sidalcea oregana subsp. oregana C. L. Hitchcock 1940-5-26 6644 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  HSC69610  Sidalcea oregana subsp. spicata Gary Schoolcraft 1980-7-14 Lassen In Ash Valley, NW of the road. 1537 Comment
  POM253297  Sidalcea oregana subsp. spicata A. A. Heller 1938-7-28 15303 Lassen 1 mile East of Westwood. 1524 Comment
  UC725938  Sidalcea oregana subsp. spicata A. A. Heller 1938-7-28 15303 Lassen a mi e Westwood; e of Westwood 1524 Comment
  RSA123272  Silene bernardina L. R. Short, D. Gish 1936-7-15 S- 487 Lassen MDM, Burgess Spr. Exp. Range; Forest: Lassen. 1744 Comment
  UC1125817  Silene bernardina A. Simontacchi 1940-7-3 928 Lassen 2.3 mi n Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1844 Comment
  CAS-BOT-BC384310  Silene bernardina George W. Gillett 1957-7-24 896 Lassen Lassen Volcanic National Park. Flats between Cameron Meadow and Snag Lake 1950 Comment
  UC773919  Silene douglasii L. R. Short and D. Gish 1936-7-15 S- 487 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1743 Comment
  UC311415  Silene lemmonii Marcus E. Jones, A. M. 1897-6-28 Lassen Perkin's Ranch Diamond Mt., , Perkin's Ranch (Susanville) 1828 Comment
  CAS-BOT-BC389493  Silene menziesii H. D. Ripley; R. C. Barneby 1943-6-14 5751 Lassen Mesa W. of Susanville 1310 Comment
  CAS-BOT-BC389553  Silene nuda Louella Bass 1973-6-15 107 Lassen Elysian Valley 1325 Comment
  CHSC4836  Silene nuda R. Carter 1967-7-16 616 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
  UCD18969  Silene nuda Raymond D. Ratliff 1965-8-4 41 Lassen Lassen National Forest, Harvey Valley Allotment (HV 25-19). 1700 Comment
  CAS-BOT-BC389550  Silene nuda John Thomas Howell 1976-7-20 52021 Lassen Flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC74890  Sinapis alba John Thomas Howell 1974-7-8 50502 Lassen Sierra Nevada. Susanville. 1295 Comment
  CHSC116070  Sisymbrium altissimum Lowell Ahart; John Dittes 2015-7-13 20316 -A Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC91206  Sisymbrium altissimum Lowell Ahart; John Dittes 2005-6-2 11921 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
  HSC27354  Sisymbrium altissimum D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19283 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  SEINET10448866  Sisymbrium altissimum Paul Gallian, David B. Dunn 1971-6-2 Gallian 521 Lassen 6 mi. N. Of hallelujah jct. On us 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge and in sandy wash. 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
  UC4218  Sisyrinchium bellum J. Burtt Davy Jun 17 1897-Jun 24 1897 3302 Lassen Tule Confederacy Adobe Meadows; Honey Lake Valley Comment
  UC477505  Sisyrinchium bellum Geo. A. Fisher 1928-6-23 30 Lassen Halls Flat 1615 Comment
  CDA38566  Sium suave F. A. Taylor 1933-7-5 s.n. Lassen Bieber. 0 Comment
  CDA38568  Sium suave T. C. Fuller 1959-7-7 4732 Lassen Highway 395, 7.5 miles east of Susanville. 0 Comment
  CHSC117279  Solanum dulcamara Lowell Ahart; John Dittes 2016-7-15 21226 Lassen About 1/2 mile (by road) souteast of the 4 tall poles, Ash Creek Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1261 Comment
  CDA18276  Solanum triflorum G. D. Barbe 1974-8-2 1942 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 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
  UC1099936  Sparganium emersum var. emersum Verne Grant and Irving Schneider 1947-8-24 8271 Lassen nw shore Blue Lake (n Lassen County) Comment
  CAS-BOT-BC390560  Spergularia rubra John Thomas Howell; Gordon H. True 1973-8-1 50245 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  RSA0008983  Sphaeromeria potentilloides var. potentilloides Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  RSA18166  Spiraea douglasii Carl B. Wolf 1929-9-1 3779 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  POM91114  Spiraea douglasii Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC61074  Spiranthes porrifolia Vernon H. Oswald 1993-8-3 5754 Lassen Cooper Swamp located E of Siver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  CHSC5276  Stachys ajugoides var. rigida L. Harman 1946-6-26 Lassen Pine Creek, Eagle Lake. 1584 Comment
  HSC26818  Stanleya elata D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19286 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  UC1951078  Stellaria borealis subsp. sitchana Debra Valov 2009-4-24 2009013 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  POM101721  Stellaria longipes F. H. Hillman 1897-7-12 s.n. Lassen Chat Comment
  SEINET11924834  Stellaria longipes Unknown 1967-1 550 Lassen 25 yds W of dam in Murrer's Meadow Comment
  CHSC4946  Stellaria longipes var. longipes R. Carter 1967-6-23 550 Lassen In meadow, 25 yds w of dam in Murrer's Meadow. 1584 Comment
  CHSC99292  Stellaria longipes var. longipes Lowell Ahart; John Dittes 2008-6-20 14956 Lassen About 200 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
  JEPS114768  Stellaria longipes var. longipes Lowell Ahart, John Dittes 2008-6-20 14956 Lassen About 200 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
  POM42274  Stenotus acaulis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1523770  Stephanomeria lactucina Gary Schoolcraft 1981-7-7 496 Lassen on slopes n Landon Lookout 2011 Comment
  CAS-BOT-BC375593  Stephanomeria lactucina Gary Schoolcraft 1982-7-14 785 Lassen West on Constantia 1463 Comment
  CHSC23485  Stephanomeria tenuifolia Wayne O. Baum 1971-7-14 71 -62 Lassen NE. slope of Gallatin Peak. 2072 Comment
  HSC79992  Stipa comata William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UCR119113  Stipa elmeri Beecher Crampton 1954-7-5 2064 Lassen Modoc Plateau, 4.5 miles west of Susanville, along state highway 36 1433 Comment
  SEINET10523055  Stipa thurberiana Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2873 Lassen Hallelujah Jct. intersection of US Hwy 395 & Calif. Hwy 70; in open waste area adjacent to Artemisia tridentata community. 1433 Comment
  SEINET10448891  Streptanthus cordatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 514 Lassen 6 mi. N. Of hallelujah jct. On us 395, in artemesia tridentata, pinyon pine, jeffrey pine along ridge and in sandy wash. 1402 Comment
  UCD149957  Stuckenia filiformis subsp. alpina William Anderson 1963-6-24 s.n. Lassen Hartson Reservoir. Comment
  UCD149959  Stuckenia striata William Anderson 1963-6-24 s.n. Lassen Hartson Reservoir. Comment
  UC768789  Suaeda calceoliformis R. F. Hoover 1940-9-29 4641 Lassen Litchfield Comment
  CHSC76098  Suaeda occidentalis Lowell Ahart; Vernon H. Oswald 1999-9-13 8211 A Lassen In a field, about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  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
  CHSC64843  Swertia albicaulis var. albicaulis Vernon H. Oswald 1995-6-26 6920 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 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
  CHSC83620  Symphoricarpos rotundifolius var. rotundifolius L. P. Janeway 2001-6-28 7236 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
  UC773939  Symphoricarpos rotundifolius var. rotundifolius L. R. Short and Wm. Gansberg 1936-7-3 S- 468 Lassen Burgess Spring Experimental Range; Lassen National Forest 1847 Comment
  UCR18738  Symphoricarpos vaccinioides Frank C. Vasek 1975-7-11 750711- 26 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  SD211535  Symphyotrichum ascendens Barbara Ertter 1987-7-24 7299 Lassen circa 3/4 mile East-Northeast of Beckwourth Pass at end of old crumbling paved road 1524 Comment
  SEINET1906280  Symphyotrichum ascendens Barbara Ertter 1987-1 7299 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road; 1524 Comment
  CAS-BOT-BC97526  Symphyotrichum ascendens Margaret Williams; Louella Bass 1972-10-22 EV 4 Lassen Elysian Valley, northwest of Janesville 1325 Comment
  CHSC72216  Symphyotrichum campestre Vernon H. Oswald 1998-9-14 9623 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment