Search Results — 2000 specimen records retrieved (1627 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC13792  Abies concolor Anne Linda Brisk 1969-7-2 33 Lassen Growing along the shore of Mohogany Lake. Comment
  UCD133116  Abies concolor Beecher Crampton 1960-6-18 5711 Lassen Southern Warner Mountains, vicinity of Blue Lake Ranch. 1981 Comment
  CDA18380  Acer negundo G. D. Barbe 1978-7-11 2400 Lassen Madeline Plains; Madeline Plains, West Side Rd. W of Termo. 1615 Comment
  SEINET10473515  Achillea lanulosa Mary Susan Taylor 1974-1 Taylor 286 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC28650  Achillea millefolium Albert Michael Vollmer; L. Beane 1953-7-1 97 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  CHSC12493  Achillea millefolium Carol Weld 1969-6-20 20 Lassen Dean's Meadow. 1950 Comment
  CHSC60271  Achillea millefolium P. V. Caldwell 1972-6-23 245 Lassen Headwaters of Willow Creek, Upper Murer's Meadow. Comment
  CHSC67055  Achillea millefolium Willis Ball 1969-6-20 19 Lassen Found in Dean's Meadow. 1950 Comment
  HSC4553  Achillea millefolium M. T. Milligan 1964-7-16 136 Lassen 2 mi. N on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  UC1136758  Achillea millefolium George A. Fischer and Irwin H. Johnson 1933-7-12 F 207 Lassen Grass Valley 1700 Comment
  UC1537057  Achillea millefolium Gordon H. True Jr. 1936-6-22 524 Lassen se of, near edge of slough Litchfield; Honey Lake Valley 1219 Comment
  CAS-BOT-BC28649  Achillea millefolium Lassen 1927 G. S. Crew 1927-7-15 78 Lassen Lassen County 1725 Comment
  UCD51450  Achnatherum X bloomeri Howard Gebel 1966-6-14 s.n. Lassen Belfast tableland. 1341 Comment
  UC1131573  Achnatherum hymenoides H. S. Yates 1936-8-11 6076 Lassen near Johnstonville; Susanville Quadrangle Comment
  UC1131588  Achnatherum hymenoides E. Sawyer 1935-6-27 232 Lassen Long Valley Sierraville Quadrangle Comment
  UCD50795  Achnatherum nelsonii John Thomas Howell 1976-7-20 52026 Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass, Lassen County. 1432 Comment
  UCD51066  Achnatherum occidentale subsp. californicum Beecher Crampton 1960-6-18 5729 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UC1133257  Achnatherum occidentale subsp. occidentale H. P. Hagge 1929-9-17 38 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC584331  Achnatherum occidentale subsp. occidentale G. L. Stebbins Jr. 1937-7-11 2324 Lassen 1 mi below summit; Black Mt. 1940 Comment
  CAS-BOT-BC218610  Achnatherum occidentale subsp. pubescens John Thomas Howell 1976-7-19 51981 Lassen Gold Run Creek southwest of Susanville, Sierra Nevada 1386 Comment
  CAS-BOT-BC218611  Achnatherum occidentale subsp. pubescens John Thomas Howell 1974-7-10 50519 Lassen Janesville, at the cemetery, Sierra Nevada 1295 Comment
  UCD18961  Achnatherum occidentale subsp. pubescens Raymond D. Ratliff 1965-7-12 15 Lassen Lassen National Forest, Harvey Valley Allotment and Champ's Flat Allotment (HV 81-76 and CF 81-9). 1737 Comment
  UCD32666  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2066 Lassen Lassen County, 5.5 miles west of Susanville, along highway 36. 1447 Comment
  UCD51205  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2069 Lassen Along US Hwy. 395, 1 mile east of Johnstonville. Comment
  UCD51209  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2051 Lassen Along Hwy. 36, 4.5 miles west of Susanville. 1432 Comment
  CAS-BOT-BC218007  Achnatherum thurberianum J. A. Jenkins 1937-7-15 2355 Lassen SW slope Big Valley Mountain along highway from McArthur to Bieber 1127 Comment
  SEINET235272 Image available Achnatherum thurberianum CSU Chico Lassen unspecified Comment
  UC1153869  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen mountain flat 4.5 mi w on State Hwy. 36 Susanville 1432 Comment
  UCD32656  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD32677  Achnatherum thurberianum Beecher Crampton 1954-7-6 2082 Lassen Lassen County, 7 miles north of Madeline, along US highway 395, roadside. 1524 Comment
  CAS-BOT-BC218010  Achnatherum thurberianum Clifton F. Smith 1964-6-25 8566 Lassen On road from Ozen to Lockwood Valley watershed, 0.5 mile from the latter near summit, Cuyama Valley drainage 1645 Comment
  CAS-BOT-BC217991  Achnatherum webberi David D. Keck; J. Clausen 1935-6-24 3749 Lassen 2 miles S of Ravendale 1463 Comment
  CAS-BOT-BC217993  Achnatherum webberi David D. Keck; J. Clausen 1935-6-24 3749 Lassen 2 miles S of Ravendale 1463 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
  JEPS23491  Aconitum columbianum Frances D. Payne 1929-7-12 92 Lassen n.e. Lassen Co., Upper Silver Creek Warner Mts., n.e. Lassen Co., Upper Silver Creek 2286 Comment
  CAS-BOT-BC391607  Actaea rubra John Thomas Howell; Gordon H. True 1973-8-1 50164 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen Comment
  CHSC25082  Agastache parvifolia K. R. Stern 1967-6-30 2455 Lassen West Central side of Eagle Lake. 1554 Comment
  JEPS126483  Agastache parvifolia Valda Lockie, Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemky 2015-7-15 CA 350 -047 Lassen Directly off Horn Ranch Road. Follow Horn Ranch Road until you reach a fork with a sign. Follow road left then continue for about 3-5 miles. Comment
  UC1537574  Agastache urticifolia Gordon H. True Jr. 1936-6-27 564 Lassen n slope Hot Spring Mountain; n slope of Hot Spring Mountain 1828 Comment
  CAS-BOT-BC30238  Ageratina occidentalis George Wilson Gillett 1957-7-26 904 Lassen Butte lake, point of rocks west of outlet and above trail 1844 Comment
  JEPS28677  Ageratina occidentalis George W. Gillett 1957-7-26 904 Lassen point of rocks, w of outlet and above trail Butte Lake; Lassen Volcanic National Park, Butte Lake 1844 Comment
  UC1037267  Ageratina occidentalis Leo Whitney 1933-8-27 1797 Lassen 14 mi w Eagle Lake (Harvey Lookout); Lassen National Forest, Harvey Valley 2225 Comment
  CAS-BOT-BC30236  Ageratina occidentalis Hans Leschke 1959-8-8 1634 Lassen Between Bumpas Hell and Cold Boiling Lake 2407 Comment
  UC468890  Agoseris X dasycarpa J. Burtt Davy Jun 17 1897-Jun 24 1897 3405 Lassen Chat Long Valley Comment
  CHSC7649  Agoseris aurantiaca Beverly J. Wise 1969-5-18 10 Lassen Alongside Susan River. 1615 Comment
  POM33406  Agoseris glauca var. dasycephala F. H. Hillman 1897-7-12 s.n. Lassen Chat Comment
Read comments
Mar 6 2011
  UCD128649  Agoseris glauca var. glauca Grady L. Webster 1989-5-13 7704 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  CHSC93703  Agoseris glauca var. 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
  UCD128593  Agoseris grandiflora G. Schoolcraft 2000-6-19 2904 Lassen Susanville; west of Cold Spring Valley. 1706 Comment
  UC76006  Agoseris grandiflora var. grandiflora Milo S. Baker Lassen s side Dixie Mt. Comment
  CAS-BOT-BC22893  Agoseris heterophylla Margaret J. Williams; Gary Schoolcraft; Arnold Tiehm 1986-5-12 82- 19 -1 Lassen Smoke Creek Rd., 0.1 mi E of Hwy 395 1371 Comment
  CAS-BOT-BC433230  Agoseris heterophylla K. L. Chambers; Peter G. Dorris 1963-5-11 s.n. Lassen Red Rock Road, just east of Hwy. 395 (and just w. of Nevada State Line), ca. 10 mi. n. of Hwy. 70 junction, and s. of Constantia. Comment
  UC29359  Agoseris heterophylla var. heterophylla M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixey Mts. Comment
  UCD107495  Agoseris monticola Tim Kuhn 2006-7-18 41 Lassen Eagle Lake Ranger District.. Comment
  CAS-BOT-BC13230  Agoseris monticola Margaret Williams 1974-8-4 74 -L-79 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70. 1493 Comment
  JEPS93832  Agoseris parviflora Vernon H. Oswald and Lowell Ahart 1998-6-4 9142 Lassen south of Constantia (spur road on n side of Red Rock Road 0.6 mi e of Highway 395); Red Rock Road 1389 Comment
  CHSC36498  Agoseris retrorsa Theresa Costa 1982-6-2 28 Lassen Ca. .6 mi W jct forest service rds 5.16 and 5.17, ca. 10 yd E 5.16 heading over Black Mtn. Comment
  UC1136778  Agoseris retrorsa L. R. Short and W. McNulty 1936-6-15 S- 436 Lassen Burgess Spring Exp. Range 1848 Comment
  CDA1684  Agropyron cristatum subsp. pectinatum G. D. Barbe 1974-8-2 1919 Lassen Hallelujah Junction, US 395 at Hwy 70, northwest corner. Comment
  JEPS100322  Agrostis exarata Dean W. Taylor 2001-7-12 17829 Lassen Diamond Mountains, spring at mouth of canyon ca. 4 miles NW of Constantia, along Forest Road 25N02X 1341 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
  UC1100103  Agrostis exarata Malcolm A. Nobs, S. Galen Smith 1949-7-21 1057 Lassen 4 mi n Madeline Comment
  UC1024658  Agrostis oregonensis Leo Whitney 1933-8-7 2194 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  UC1594652  Agrostis pallens Vernon H. Oswald and Lowell Ahart 1992-7-16 5107 Lassen s side of Hwy 44 1.2 mi se County Road A21 (between Old Station and Susanville); Long Lake 1745 Comment
  UC53496  Agrostis pallens M. S. Baker and Frank Nutting 1894-7-21 Lassen Eagle Lake 1524 Comment
  UCD53173  Agrostis pallens L. Whitney 1933-8-7 2194 Lassen Slate Creek, 8 miles northwest of Eagle Lake, Lassen National Forest. 1920 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
  UCD53299  Agrostis scabra L. Whitney 1933-8-15 s.n. Lassen Meadow near Sheepshead. Comment
  UCD53581  Agrostis stolonifera August L. Hormay 1932-7-20 s.n. Lassen Lassen National Forest. Bogard Ranger Station. Comment
  JEPS28272  Agrostis variabilis George W. Gillett 1957-7-28 927 Lassen above junction Snag Lake trail (100 yds above trail junction, trail to Widow Lake, at upper end of Butte Lake); Lassen Volcanic National Park, Butte Lake 1859 Comment
  UCD149882  Aliciella leptomeria Harry George 1967-6-14 s.n. Lassen Hartson Reservoir. Comment
  CAS-BOT-BC267060  Alisma John Thomas Howell 1974-7-10 50546 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC267061  Alisma John Thomas Howell 1974-7-10 50546 Lassen Elysian Valley 1325 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
  UC55670  Alisma plantago-aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3337 Lassen Susan River Honey Lake Valley 1219 Comment
  JEPS119644  Alisma triviale Lowell Ahart, John Dittes 2012-7-9 18294 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 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
  GMDRC7739  Allium acuminatum J. M. Andre, G. Clifton 1993-6-1 33419 Lassen Modoc Plateau: along US Hwy 395 approx 11 mi. SE of Ravendale, just north of Tule Patch Spring, east of Snowstorm Mtn 1588 Comment
  HSC47285  Allium anceps Dale McNeal 1978-5-30 2127 Lassen Beside Hwy. 395, 3 mi. S of Ravendale Comment
  HSC67113  Allium anceps Dale McNeal 1980-6-1 2340 Lassen Beside Hwy. 88 between Adin and Madeline, 15 mi. E of Hwy. 299 in Adin Comment
  JEPS103169  Allium atrorubens var. atrorubens Beth Corbin 2002-6-4 1077 Lassen About 1/8 mi E of Viewland Monument on Hwy 395. 1371 Comment
  POM110223  Allium campanulatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CHSC60864  Allium lemmonii Vernon H. Oswald; Lowell Ahart 1993-6-28 5587 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valey, E of Poison Lake. 1728 Comment
  POM110069  Allium lemmonii Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  SEINET8122319  Allium lemmonii G. Schoolcraft 1993-1 2287 Lassen Clark Valley Road, ca 9.5 miles E of Madaline. 1829 Comment
  CHSC68887  Allium platycaule Vernon Oswald; Lowell Ahart 1997-6-24 8624 Lassen South of Susanville on the north side of Diamond Mtn. On Forest Rd. 21N52, 1.0 mi southwest of its junction with 29N43. 2164 Comment
  UC1135175  Alnus incana subsp. tenuifolia C. W. Hanks 1934-9-27 94 Lassen Long Valley Sierraville Quadrangle (w slope, near Plumas National Forest) Comment
Read comments
May 8 2013
  SEINET10589833  Alopecurus Robert F. Thorne, Larry E. DeBuhr 1975-8-22 Thorne 46987 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CDA28189  Alopecurus aequalis A. A. Beetle 1941-6-28 Lassen Route 36, 10 mi west of Chester 0 Comment
  CHSC66280  Alopecurus aequalis Vernon H. Oswald; Lowell Ahart 1996-6-24 7873 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. 1633 Comment
  HSC63950  Alopecurus aequalis Teresa Prendusi 1980-7-9 1115 Lassen Horse Camp Spring, approximately 39 mi. N of spring 1707 Comment
  JEPS88576  Alopecurus aequalis Vernon H. Oswald and Lowell Ahart 1996-6-24 7873 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), along Papoose Creek where it leaves the n end of the meadow, Modoc Plateau); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  RSA129212  Alopecurus aequalis H. S. Yates 1936-8-12 6082 Lassen McKenzie Meadow: Susanville 1524 Comment
  UC1567403  Alopecurus aequalis G. Schoolcraft 1989-7-18 1976 Lassen s. of Clark's Valley Rd. near Buck's Spring 1572 Comment
  CAS-BOT-BC138162  Alopecurus aequalis var. aequalis John Thomas Howell 1975-7-23 51388 Lassen Sierra Nevada. Susanville. 1295 Comment
  CDA42956  Alopecurus carolinianus L. Ahart, John Dittes, Todd Sloat 2013-6-8 18731 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. Comment
  JEPS127218  Alopecurus carolinianus Lowell Ahart, John Dittes 2016-7-15 21214 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS87507  Alyssum desertorum Vernon H. Oswald and Lowell Ahart 1993-6-14 5534 Lassen 20 mi e.-n.e. of Spaulding Tract Road ((Rd. 518, 33N89), Eagle Lake Road (Lassen Al) at Sandy Beach on the w. shore of Eagle Lake); Eagle Lake, Sandy Beach 1566 Comment
  UC1609213  Alyssum desertorum Vernon H. Oswald and Lowell Ahart 1993-6-14 5534 Lassen 20 mi e.-n.e. of Spaulding Tract Road ((Rd. 518, 33N89), Eagle Lake Road (Lassen Al) at Sandy Beach on the w. shore of Eagle Lake); Eagle Lake, Sandy Beach 1566 Comment
  CHSC106172  Amaranthus blitoides Lowell Ahart; John Dittes 2010-8-30 17090 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1274 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
  HSC31339  Amaranthus blitoides D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19304 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  CHSC66859  Amaranthus californicus Vernon H. Oswald; Lowell Ahart 1996-9-10 8277 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  CAS-BOT-BC42891  Ambrosia acanthicarpa Margaret Williams; Steven Williams 1974-7-26 74 -L-10 Lassen Burned area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC65288  Ambrosia acanthicarpa Vernon Oswald; Lowell Ahart 1995-8-14 7191 Lassen Modoc Plateau. Horse Lake Rd. (Lasen536) 1.8 mi W of Hwy. 395, N of Susanville. 1645 Comment
  JEPS40951  Ambrosia acanthicarpa R. F. Hoover 1940-10-5 4666 Lassen Wendel Comment
  RSA518417  Ambrosia acanthicarpa George K. Helmkamp 1990-9-23 A- 3 Lassen 3 mi. E of Susanville, along State Road 36. 1341 Comment
  UCD143900  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen along State Highway 70 at Beckwourth Pass around 4.3 miles west of its junction with US Highway 395 or 1.6 miles east of Sierra Valley. 1584 Comment
  CHSC1536  Amelanchier pallida V. Holt 1935-5-31 Lassen Near Susanville. 1584 Comment
  RSA38467  Amelanchier pallida Philip A. Munz 1947-5-19 11859 Lassen Fredonyer Forest Camp Ground on Hwy 36 W of Susanville. 1509 Comment
  CAS-BOT-BC142537  Amelanchier utahensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49160 Lassen Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  JEPS28676  Amelanchier utahensis George W. Gillett 1957-7-26 903 Lassen Butte Lake Lassen Volcanic National Park (point of rocks w of outlet and above trail) 1844 Comment
  SBBG14885  Amelanchier utahensis A. I. Richardson 1961-5-30 8 Lassen S of Eagle Lake 1402 Comment
  CHSC109980  Amphiscirpus nevadensis Richard R. Halse 2010-8-25 8087 Lassen Along State Hwy. 139 ca. 26.2 miles north of Susanville on the northeast shore of Eagle Lake. 1559 Comment
  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
  UCD119818  Amsinckia tessellata John Thomas Howell 1934-6-10 11842 Lassen Near Plumas Junction. Comment
  JEPS25532  Amsinckia tessellata var. tessellata Rimo Bacigalupi with Lincoln Constance 1959-6-16 7146 Lassen 1.4 mi s Termo (along U.S. Hwy 395) 1615 Comment
  UC585123  Amsinckia tessellata var. tessellata E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1747 Lassen e facing slope of gully on mountain above Red Rock 1432 Comment
  CHSC117217  Ancistrocarphus filagineus Lowell Ahart; John Dittes 2016-6-7 21000 Lassen Near Stonebreaker Road, 0.7 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1587035  Ancistrocarphus filagineus G. Schoolcraft 1991-6-19 2168 Lassen about 1.5 mi w Canby 1341 Comment
  CAS-BOT-BC15606  Ancistrocarphus filagineus Alice Eastwood; J. T. Howell 1940-6-16 8354 Lassen Constantia Comment
  UC424647  Anemone occidentalis R. H. Finch Aug. 1930 Lassen <Mineral ?> Comment
  CHSC71068  Anisocoma acaulis Vernon H. Oswald; Lowell Ahart 1998-5-22 9134 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. 1341 Comment
  CAS-BOT-BC63953  Antennaria argentea Clare B. Hardham 1969-8-28 17453 C. Lassen West of Janesville Comment
  UC1125575  Antennaria argentea A. Simontacchi 1940-6-23 886 Lassen 3.2 mi sw Schoonamaker Lake; Halls Flat Quad. 1920 Comment
  CHSC108021  Antennaria dimorpha Lowell Ahart; John Dittes 2011-6-20 17508 Lassen About 40 yards north of the dirt road, about 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  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
  CAS-BOT-BC69139  Antennaria geyeri Geo. A. Fisher 1928-6-23 31 Lassen Halls Flat 1615 Comment
  CHSC92677  Antennaria geyeri L. P. Janeway; B. Castro 2005-7-10 8478 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. Northerly-facing side of the crest. 1859 Comment
  JEPS100336  Antennaria geyeri Dean W. Taylor 2001-7-19 17842 Lassen Diamond Mountains, ridgecrest ca. 1 air mile South of Doyle Grade 2072 Comment
  UC1137666  Antennaria geyeri L. R. Short and Wm. Gansberg 1936-7-3 S- 475 Lassen Lassen National Forest 1828 Comment
  RSA702449  Antennaria luzuloides L. P. Janeway 2004-6-26 8167 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  UC1137667  Antennaria luzuloides L. R. Short and J. Warren 1936-6-23 S- 452 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1741 Comment
  UCD169450  Antennaria luzuloides Lowell Ahart; John Dittes 2005-6-1 11862 Lassen Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. About 1/2 mile west of Scott Road, on the east side of the poor dirt road. 1448 Comment
  SBBG63415  Antennaria rosea S. W. Hutchinson, M. N. Ackley -Jun-1925 214 Lassen Eagle Lake 1554 Comment
  UC1609112  Antennaria rosea Vernon H. Oswald and Lowell Ahart 1993-6-14 5506 Lassen Lassen A21 (32N02) 2.1 mi e Lassen 105 (32N28Y) (se side of valley, ca 8 air mi w of Eagle Lake); Pine Creek Valley 1728 Comment
  JEPS127243  Apera interrupta Lowell Ahart, John Dittes 2016-7-13 21143 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  HSC63938  Apocynum cannabinum Teresa Prendusi 1980-7-16 Lassen Willow Creek. Comment
  CAS-BOT-BC392013  Aquilegia Clare B. Hardham 1969-8-28 17453 I Lassen Slope west of Janesville Comment
  CHSC4814  Aquilegia formosa var. truncata R. Carter 1967-7-29 573 Lassen Found in Murrer's meadow, W side where canal runs. 1584 Comment
  UC1137671  Arabis glabra L. R. Short and Wm. Gansberg 1936-6-10 S- 422 Lassen Burgess Spring Experimental Range Lassen Forest 1850 Comment
  CHSC29891  Arabis holboellii var. retrofracta Robin L. Ondricek 1978-5-25 29 Lassen .4 mi N of Lake Forest Development on Co. Rd. A1. 1828 Comment
  SEINET3899870  Arabis holboellii var. retrofracta Reed C. Rollins, Kathryn W. Rollins 1981-5-31 81177 Lassen Just north of Eagle Lake.; 0 Comment
  RSA0129096  Arabis oligantha Franklin P. Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  RSA0129045  Arabis platysperma Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  NY119566  Arabis sparsiflora H. D. D. Ripley 1944-5-29 5948 Lassen South of Constantia 1447.8 Comment
  NY119620  Arabis sparsiflora var. subvillosa R. C. Rollins 1981-5-31 81178 Lassen Just north of Eagle Lake Comment
  NY119631  Arabis suffrutescens G. Schoolcraft 1983-6-29 1038 Lassen Coulthurst Flat area, 34-10-27 SW 1889.8 Comment
  CAS-BOT-BC45892  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  CAS-BOT-BC45894  Arctostaphylos nevadensis Clare B. Hardham 1971-8-22 18386 Lassen North slopes 2133 Comment
  UC549429  Arctostaphylos patula F. Farris 1934-12-30 Lassen Diamond Mt. 1524 Comment
  UCR23066  Arctostaphylos patula Susanne M. James 1980-4-23 117 Lassen Hwy 30, 5.2 mi west of Susanville, 0.9 mi W Hwy A1 Comment
  RSA700049  Arenaria congesta L. P. Janeway 2001-6-20 7191 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. 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
  CHSC106087  Arenaria congesta var. congesta Lowell Ahart; John Dittes 2010-7-31 17011 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  UCD95199  Argemone munita Verne Grant; Irving Schneider 1947-9-5 8367 Lassen northwest shore of Eagle Lake, by Sam Webb's place (Spaulding.) 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
  SEINET10940510  Argemone platyceras var. hispida Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 864 Lassen Collected on raod bank 24 mi n of calif state line of hwy 395. Comment
  UC71725  Argemone rotundata Mrs. M. H. Manning 1902-9-1 1 Lassen Reno Nevada to Amadee California Amadee Comment
  CHSC59072  Arnica chamissonis Vernon H. Oswald; Lowell Ahart 1992-8-25 5192 Lassen Lassen Volcanic National Park. West shore of Snag Lake SW of the islands. 1851 Comment
  JEPS88428  Arnica chamissonis Vernon H. Oswald and Lowell Ahart 1996-8-1 8109 Lassen sw Westwood (shore of reservoir ne of Indian Ole Dam); Mountain Meadows Reservoir 1539 Comment
  UC1533139  Arnica chamissonis Gary Schoolcraft 1986-8-19 1667 Lassen Said Valley Res. 1630 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
  JEPS118465  Arnica chamissonis subsp. foliosa Lowell Ahart, John Dittes 2011-6-21 17534 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
  POM253188  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mile east of Fredonyer Pass on hwy 36 1707 Comment
  CHSC27166  Arnica dealbata J. D. Prouty 1978-7-27 31 Lassen 2.4 mi w of jct with road A-1 on n side of Merrill Flat Rd, s of Eagle Lake. 1740 Comment
  CHSC27167  Arnica dealbata J. D. Prouty 1978-7-27 30 Lassen 3.9 mi w of jct with road A-1 on n side of Merrill Flat Rd just e of Roney Corral, s of Eagle Lake. 1770 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
  CAS-BOT-BC82678  Arnica longifolia L. S. Smith 1918-7-22 1007 Lassen Blue Lake, Modoc National Forest 1874 Comment
  CHSC64861  Arnica mollis Vernon H. Oswald; Lowell Ahart 1995-6-26 6921 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  CHSC12429  Arnica nevadensis Robert W. Severin 1969-6-21 10 Lassen 2 mi SSE E.L.B.S. between Five Points turnoffs. 1584 Comment
  UCD129186  Artemisia arbuscula B. L. Kay 1955-4-19 s.n. Lassen 15 miles north of Honey Lake. US Highway 395. Comment
  CHSC118794  Artemisia arbuscula subsp. arbuscula L. P. Janeway; B. Castro 2015-6-5 11766 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 7.4 road-km south of Surprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CAS-BOT-BC84828  Artemisia cana subsp. cana Ernest C. Twisselmann 1961-7-21 6572 Lassen Harvey Valley 1981 Comment
  UCR67466  Artemisia douglasiana George K. Helmkamp 1990-9-23 G- 9 Lassen north of Ravendale 1677 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
  SEINET7153235 Image available Artemisia ludoviciana subsp. ludoviciana G. Schoolcraft 1999-8-11 2878 Lassen East edge of Madeline Plains e. of Ravendale. 1628 Comment
  NY703664  Artemisia nova A. Tiehm 2003-9-11 14368 Lassen 2.9 road miles north of Karlo Road on highway 395 from Litchfield to Alturas, just east of the highway 1402 Comment
  RSA719608  Artemisia nova A. Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 miles north of Karlo Road on highway 395 from Litchfield to Alturas, just east of highway 1402 Comment
  CDA19747  Artemisia spinescens D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat. 0 Comment
  CHSC76080  Artemisia tridentata subsp. tridentata Lowell Ahart; Vernon H. Oswald 1999-9-13 8202 Lassen On the west side of the dirt road and 1/4 mile south of the sign-in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  JEPS37009  Artemisia tridentata subsp. tridentata W. L. Jepson 1918-8-5 7818 Lassen near South Fork Peak 1645 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
  UC1123518  Asclepias cordifolia C. W. Hanks 1934-9-26 93 Lassen near Plumas National Forest (w side of valley); Sierraville Quadrangle, Long Valley Comment
  CHSC5039  Asclepias fascicularis L. B. Barlow 1967-7-11 129 Lassen Vic. Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  POM181067  Aster M. S. Jussel 1931-9-6 s.n. Lassen Sulphur Works, Mt. Lassen 2134 Comment
  RSA712642  Aster occidentalis var. occidentalis L. P. Janeway 2005-8-31 8513 Lassen Northern High Sierra Nevada. Diamond Mountains; head of large flat dry meadow at head of Bird Creek; 0.8 km northeast of Meadow View Peak. 1960 Comment
  CAS-BOT-BC177435  Astragalus andersonii Margaret Williams 1974-8-4 74 -L-83 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC106586  Astragalus andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC116920  Astragalus andersonii J. P. Bergmann 2011-4-30 Lassen Fort Sage OHV Recreation Area. 1450 Comment
  NY791368  Astragalus andersonii M. J. Williams 1978-5-14 7848- 2 Lassen 2.8 miles south of northern road into Red Rock (off Highway 395) 1371.6 Comment
  UC1594460  Astragalus anxius Meinke and Lantz 1991-7-16 6108 Lassen ca 25 km w Madeline (along Ash Valley Rd.); Ash Valley 1550 Comment
  SEINET10544285 Image available Astragalus anxius R. J. Meinke 1991-7-16 Meinke 6108 Lassen Ash Valley, ca. 25 km W of Madeline, along Ash Valley Rd.; on boundary of T38N, R11E, Sect. 32 and T37N, R11E, Sec. 5. In loose, gravelly ash thinly overlying volcanic bedrock. 1550 Comment
  RSA362358  Astragalus argophyllus var. argophyllus A. Tiehm, Gary Schoolcraft 1986-5-12 10347 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
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Aug 12 2008
  SEINET5323198  Astragalus bolanderi R. McKee, H. L. Westover 1918-6-13 s.n. Lassen Susanville 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
  HSC82253  Astragalus curvicarpus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6005 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  RSA111041  Astragalus curvicarpus H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5676 Lassen N or Doyle. 1265 Comment
  SEINET12162068  Astragalus curvicarpus K. R. Stern 1974-1 5816 Lassen 16.5 mi W of Madeline, on Madeline-Adin Rd. Likely Quadrangle, sec. 32, R11E T35N 1548 Comment
  UC372641  Astragalus curvicarpus var. curvicarpus Marcus E. Jones, A. M. 1897-6-24 Lassen 10 to 15 mi w from Amedee; w from Amedee 1219 Comment
  SEINET11268146  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald, Lowell Ahart 1993-6-14 5519 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).; 0 1567 Comment
  CAS-BOT-BC182954  Astragalus filipes Peter H. Raven; Otto T. Solbrig 1958-6-17 13290 Lassen Along United States Highway 395, 0.4 miles south of Ravendale Comment
  CHSC64876  Astragalus filipes Vernon H. Oswald; Lowell Ahart 1995-6-19 6883 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395. In wash on n side of road. 1371 Comment
  CHSC7675  Astragalus filipes Beverley J. Wise 1969-5-3 52 Lassen 4.8 mi. east of Hwy 395 on Las. Co. Rd 338 (Smoke Creek road). 1615 Comment
  NY658500  Astragalus filipes P. H. Raven 1958-6-17 13290 Lassen Along US Highway 395, o.4 mile South of Ravendale Comment
  SBBG30554  Astragalus filipes D. Myrick 1968-6-19 1959 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  UC1924595  Astragalus filipes Debra Valov 2006-5-28 2006005 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1284 Comment
  RSA111070  Astragalus filipes H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5675 Lassen South of Constantia. 1463 Comment
  CHSC116921  Astragalus geyeri J. P. Bergmann 2011-4-30 Lassen Fort Sage OHV Recreation Area. 1450 Comment
  NY674273  Astragalus gibbsii G. Schoolcraft 1982-7-20 806 Lassen Wagner Canyon, east of McKesick Peak 1524 Comment
  POM26155  Astragalus gibbsii Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  NY674272  Astragalus gibbsii J. T. Howell 1974-7-10 50515 Lassen Sagebrush flat at the cemetery, Janesville 1295 Comment
  CAS-BOT-BC186912  Astragalus inversus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CAS-BOT-BC186943  Astragalus iodanthus Arnold Tiehm 1980-5-29 5755 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel 1231 Comment
  CHSC99730  Astragalus lemmonii Lowell Ahart; John Dittes 2008-6-20 14968 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
  JEPS114989  Astragalus lemmonii Lowell Ahart, John Dittes 2008-6-20 14968 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
  CAS-BOT-BC187156  Astragalus lentiginosus var. chartaceus John Thomas Howell 1934-7-6 12437 Lassen Harvey Valley Comment
  CHSC60900  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald 1993-7-8 5663 Lassen Pittvile Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  RSA754376  Astragalus lentiginosus var. lentiginosus Brian Knaus 2005-6-14 136 Lassen W of Susanville, at junction of hihways 26 and 44. 1502 Comment
  UC1609460  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald and Lowell Ahart 1993-7-8 5663 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi n Hwy 44 (se edge Poison Lake); se edge Poison Lake 1709 Comment
  CHSC64877  Astragalus lentiginosus var. salinus Vernon H. Oswald; Lowell Ahart 1995-6-19 6903 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Road., 8.5 mi e of Hwy. 395. 1444 Comment
  CHSC99125  Astragalus lentiginosus var. salinus Lowell Ahart; John Dittes 2008-6-19 14898 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
  POM280735  Astragalus lentiginosus var. salinus Alice Eastwood, John T. Howell 1940-6-16 8335 Lassen Near Susanville. 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
  HSC63126  Astragalus malacus Teresa Prendusi 1980-4-28 1101 Lassen Rice Canyon 1341 Comment
  CAS-BOT-BC192844  Astragalus pulsiferae A. A. Heller; P. B. Kennedy 1907-7-1 8674 Lassen Near Old Chat Comment
  UC1483870  Astragalus pulsiferae G. Schoolcraft 1980-7-10 301 A Lassen near Eagle Lake Campground (at n end of Eagle Lake); n end Eagle Lake, near Eagle Lake campground 1584 Comment
  RSA0006848  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1943-6-17 5799 Lassen East side of Beckwourth Pass. 1494 Comment
  RSA0006849  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1944-5-30 5967 Lassen North of Secret Valley. 1616 Comment
  CHSC21173  Astragalus purshii M. S. Taylor 1975-5-4 224 Lassen Ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  CHSC25301  Astragalus purshii Pauleen Broyles 1977-5-30 144 Lassen Spencer's Basin ca 8 km n of Herlong. 1770 Comment
  CAS-BOT-BC194095  Astragalus purshii var. purshii Clare B. Hardham 1978-4-20 21588 Lassen North west edge of Susanville Comment
  CAS-BOT-BC192972  Astragalus purshii var. tinctus John Thomas Howell 1934-6-10 11862 Lassen Honey Lake Valley 37 miles s. of Susanville Comment
  UC1128895  Astragalus purshii var. tinctus A. Simontacchi 1940-5-9 694 Lassen 4.5 mi sse of B.M. 7310 on Black Mtn; Halls Flat Quad., Lassen National Forest, Black Mtn Comment
  SEINET10490025  Astragalus purshii var. tinctus David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17789 Lassen 6 mi n of hallelujah jct on us hwy 395 in artemisia tridentata pinyon pine Jeffery pine along high ridge and sandy wash. 1402 Comment
  JEPS90987  Astragalus whitneyi var. confusus Dean Wm. Taylor with Glenn Clifton 1990-6-12 10887 Lassen along creek at crossing of Road 527 (Forest Road 39N08); Modoc Plateau, Ash Valley, Ash Creek 1554 Comment
  CDA7885  Astragalus whitneyi var. confusus G. Schoolcraft 1985-5-22 s.n. Lassen Along A2 about 5 miles S of Adin, CA. Comment
  CAS-BOT-BC199137  Astragalus whitneyi var. siskiyouensis Clare B. Hardham 1971-8-22 18366 Lassen Diamond Mountain 2346 Comment
  NY701850  Astragalus whitneyi var. siskiyouensis B. J. Ertter 1987-6-16 7183 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  NY701852  Astragalus whitneyi var. siskiyouensis H. D. D. Ripley 1943-6-14 5747 Lassen Hidden Valley, east of Susanville 1585 Comment
  CHSC29871  Astragalus whitneyi var. whitneyi Robin L. Ondricek 1978-7-22 106 Lassen One mi s of Colley Point Overlook on Hwy 139. 1670 Comment
  CHSC72311  Astragalus whitneyi var. whitneyi L. P. Janeway; Glenn Clifton 1998-7-8 5722 Lassen Ridgetop saddle about 2.4 mi northwest of Red Rock; along Road 213, 0.1 mi east of the junction of Roads 28N08, 29N10, 213, and 28N55. 1988 Comment
  CAS-BOT-BC66017  Athyrium filix-femina var. cyclosorum B. C. Cain 1925-8-24 120 Lassen 1 mile below Drakesbad, Mt. Lassen Nat. Park Comment
  NY526733  Atriplex canescens R. F. Hoover 1940-10-5 4668 Lassen Wendel Comment
  CHSC36483  Atriplex confertifolia Margaret E. Halloran 1982-6-2 6 Lassen Ravendale Rd e of Horse Lake. Comment
  UCSB61625  Atriplex confertifolia True, Jr., Gordon 1936-6-24 Lassen North shore of Honey Lake, Honey Lake Valley 1219 Comment
  SEINET515855  Atriplex gmelinii Vernon H. Oswald 1998-9-8 9581 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.) 1259 Comment
  CHSC76093  Atriplex heterosperma Lowell Ahart; Vernon Oswald 1999-9-13 8208 Lassen On the west side of the dirt road and 1/2 mile south of the isgn in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1176 Comment
  SEINET11839299  Balsamorhiza hirsuta N. H. Holmgren, Holmgren, P. K. 1978-1 8935 Lassen upper Smoke Creek, just S of Observation Peak, 17 km air ESE of Ravendale 1770 Comment
  CAS-BOT-BC106489  Balsamorhiza hookeri David D. Keck; J. Clausen 1935-6-24 3747 Lassen 2 mi. S. of Ravendale, in light sandy clay soil with some rock. 1463 Comment
  SEINET10534911  Balsamorhiza incana Billy Joe Cox 1971-6-2 Cox 3102 Lassen 4 mi. S of Adin along CA Hwy. 139 in basalt-clay; valley floor in Artemisia. 1341 Comment
  SEINET10617243  Balsamorhiza sagittata Paul Gallian, David B. Dunn 1971-6-2 Gallian 500 Lassen Approx. 22 mi. S of Adin on CA Hwy. 139; in basalt; assoc: Juniper, Artemisia. 1646 Comment
  CAS-BOT-BC16435  Barbarea orthoceras John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49464 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  NY119709  Barbarea orthoceras R. C. Rollins 1981-5-30 81165 Lassen Gold Run Road toward Sky Line Drive, 10 miles S of Susanville 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
  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
  SJSU4353  Beckmannia syzigachne J. W. Tilden 1960-6-27 1526 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  UCD56782  Beckmannia syzigachne Leo Whitney 1934-8-6 2210 Lassen Honey Lake Valley. Bank of Susan River. 1371 Comment
  UCD56795  Beckmannia syzigachne R. Tofsrud 1947-7-1 247 Lassen Between Bieber and Nubieber. Comment
  SEINET3100770 Image available Berteroa incana Arnold Tiehm 2005-7-14 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road miles W of highway 395 on highway 70 then 5.5 road miles N on Scott Road. 1490 Comment
  UCR182884  Berteroa incana D. Mcdonald 2005-7-18 PDR 1307852 Lassen Modoc Plateau, Hallelujah Junction Comment
  UC765510  Berula erecta R. F. Hoover 1940-10-1 4658 Lassen between Jonesville and Standish (near Honey Lake) Comment
  UC1037310  Betula glandulosa Leo Whitney 1934-7-31 1806 Lassen 7-8 mi sw Eagle Lake (moist stream bank); Lassen National Forest, Bridge Creek, Bridge Creek Camp 1737 Comment
  CHSC111100  Bidens cernua Lowell Ahart; John Dittes 2012-7-9 18295 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC96712  Bidens cernua var. cernua Gordon Leppig 1998-8-17 1047 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CAS-BOT-BC128034  Blepharipappus scaber John Thomas Howell 1976-7-20 52032 Lassen In dried depression. about 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  CAS-BOT-BC128046  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-25 3754 Lassen Susanville, on hills just west of town 1310 Comment
  CAS-BOT-BC128048  Blepharipappus scaber A. M. Vollmer; L. Beane 1953-7-1 99 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC5201  Blepharipappus scaber 1944-7-1 Lassen Eagle Lake. 1584 Comment
  HSC81800  Blepharipappus scaber Thomas W. Nelson, Jane P. Nelson 1980-7-6 6030 Lassen Ash Valley, along branch road off Adin-Madeline Rd., just S of bridge over Ash Creek, 16 mi. SE of Adin, 2.5 mi. SE of junction with main road 1555 Comment
  JEPS94612  Blepharipappus scaber Vernon H. Oswald and Lowell Ahart 1997-5-27 8484 Lassen e side of Hwy 139 at a small farm pond 38.2 mi n Susanville (7.4 mi n of Eagle Lake Rd.) 1627 Comment
  RSA713115  Blepharipappus scaber L. P. Janeway 2005-7-4 8462 Lassen Ridge top north above Long Valley; 0.4 km west of Road 34N41. High Cascade Range 1752 Comment
  UC1136967  Blepharipappus scaber L. R. Short 1936-6-10 S- 415 Lassen Burgess Spr. Exp. Range 1798 Comment
  UC1143001  Blepharipappus scaber August L. Hormay 1934-5-15 Lassen 1 mi n of Eldrigde's 1554 Comment
  CAS-BOT-BC127955  Blepharipappus scaber Dr. Jean Linsdale 1929-6-9 s.n. Lassen Pete's Valley Comment
  HSC42530  Blepharipappus scaber Barbara Kelly 1977-8-9 566 Lassen 14.3 mi. E of Madeline on the dirt road from Adin Comment
  UCD129601  Blepharipappus scaber Bob Powell; Vic Claussen 1986-7-17 3274 Lassen 6 air miles south - southwest of Nubieber, within 100 feet of gate across main north-south trending road. 1402 Comment
  UC1609118  Boechera Vernon H. Oswald and Lowell Ahart 1993-6-14 5546 Lassen ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd (Lassen A1) at Sandy Beach on w shore of Eagle Lake, n side of rd); Eagle Lake 1566 Comment
  CHSC60731  Boechera pinetorum Vernon H. Oswald; Lowell Ahart 1993-6-3 5488 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), 7.0 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, just S of the ford over Pine Creek, between Poison Lake and Susanville. ON the E side of the road. 1688 Comment
  CAS-BOT-BC25509  Boechera retrofracta John Thomas Howell; Gordon H. True 1973-8-1 50203 Lassen Sierra Nevada. Summit of Diamond Range, south of Susanville. About 3 miles east of Diamond Mountain. 2194 Comment
  CAS-BOT-BC25705  Boechera sparsiflora John Thomas Howell; Gordon H. True 1973-7-31 50064 Lassen Sierra Nevada. Diamond Range. Road from Janesville to Thompson Peak. 1783 Comment
  CHSC71125  Boechera sparsiflora Vernon H. Oswald; Lowell Ahart 1998-5-22 9131 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
  JEPS94610  Boechera sparsiflora Vernon H. Oswald and Lowell Ahart 1997-5-27 8512 Lassen on Forest Route 38N04 1.4 mi e Hwy. 139 ((between Hwy 139 near Willow Springs Guard Station and Coyote Flat), n of Susanville) 1645 Comment
  POM312611  Boisduvalia densiflora var. densiflora H. L. Mason 1947-8-11 13495 Lassen Hwy 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  RSA41170  Boisduvalia glabella Robert F. Hoover 1940-9-21 4602 Lassen 4 miles west of Susanville Comment
  UC2046019  Bolboschoenus maritimus subsp. paludosus Nick Otting, Carex Working Group 2003-7-19 708 Lassen Modoc Plateau, Biscar Reservoir, 19 air miles northeast of Susanville. Comment
  UC762005  Brickellia microphylla var. microphylla R. F. Hoover 1940-10-5 4674 Lassen pass between Shaffer Mt. and Warren Peak Shaffer Mt Comment
  SEINET201569  Brodiaea coronaria subsp. coronaria Arthur Cronquist 1959-6-18 8485 Lassen 5 miles south of Adin Comment
  CHSC27122  Bromus briziformis Robert A. Schlising 1978-6-28 3295 Lassen E of Eagle Lake at Lower Dry Lake. 1645 Comment
  CHSC7689  Bromus briziformis Beverley J. Wise 1969-5-16 125 Lassen 34.5 mi. S. E. of Susanville on Co. Rd 320. (Stacey) 1584 Comment
  SEINET8506610  Bromus briziformis D. W. Taylor 2005-6-29 19380 Lassen Piute Creek, 3 miles West from western edge, Susanville 1311 Comment
  SEINET4345029  Bromus briziformis J. A. Young 1982-6-7 s.n. Lassen N.E. Lassen Co. 1676 Comment
  CAS-BOT-BC149580  Bromus carinatus var. carinatus William Bridge Cooke 1938-6-24 11062 Lassen Mount Shasta. MacBride Spring. 1524 Comment
  CAS-BOT-BC149583  Bromus carinatus var. carinatus Parkison 1916-6-21 42 Lassen Near Patterson. 1706 Comment
  UC773968  Bromus carinatus var. carinatus L. R. Short and J. Warren 1936-6-29 S 460 Lassen Lassen National Forest, Burgess Spring Experimental Range Burgess Spring Experimental Range; Lassen National Forest, Burgess Spring Experimental Range 1820 Comment
  UCD59098  Bromus carinatus var. marginatus Beecher Crampton 1954-7-5 2055 Lassen Along Hwy. 36, 4.5 miles west of Susanville. 1432 Comment
  POM115036  Bromus catharticus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UCD58468  Bromus commutatus Beecher Crampton 1954-7-5 2067 Lassen Along Hwy. 36. 5 miles west of Susanville. Comment
  UC1024715  Bromus hordeaceus Leo Whitney 1935-5-20 3098 Lassen 14 mi w of Eagle Lake (Lassen National Forest, Harvey Valley, near dam); Lassen National Forest, Harvey Valley 1737 Comment
  OBI82789  Bromus japonicus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3923 Lassen 1.9 rd miles west of jct with Hwy 395 on Dawn Dr on E side of Shaffer Mountain. Ca 18 air mi ene of downtown Susanville.; 0 1545 Comment
  UCD58869  Bromus japonicus R. Tofsrud 1947-7-1 250 Lassen Between Bieber and Nubieber. Comment
  CHSC7690  Bromus madritensis subsp. rubens Beverley J. Wise 1969-5-23 126 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1554 Comment
  UC1131320  Bromus marginatus H. P. Hagge 1929-9-14 33 Lassen Logan Mountain 1828 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
  UC1024827  Bromus tectorum Leo Whitney 1935-7-12 3233 Lassen Lassen National Forest, Camp 10, Fruit Grower's Supply Company Lassen National Forest; , Camp 10, Fruit Grower's Supply Compa Comment
  UC1131328  Bromus tectorum A. Simontacchi 1940-5-28 783 Lassen 3.2 mi wsw of Patterson Mountain (Lassen National Forest); Lassen National Forest 1767 Comment
  UCD59855  Bromus tectorum A. A. Beetle 1941-6-28 2796 Lassen 10 miles W of Chester, rte 36. Comment
  SEINET10515057  Bromus tectorum Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3117 Lassen 6 mi n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC438314  Calandrinia ciliata T. L. Secrest 1961-6-8 s.n. Lassen Edge of McCoy Flat Reservoir, ca. 14 mi. n. of Westwood Comment
  CHSC66239  Callitriche verna Vernon H. Oswald; Lowell Ahart 1996-6-24 7870 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 or along Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  SEINET3828391  Callitriche verna R. F. Thorne, Larry E. De Buhr 1975-1 46986 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CAS-BOT-BC80346  Calocedrus decurrens John Thomas Howell 1976-7-19 51964 Lassen on Gold Run Creek southwest of Susanville 1386 Comment
  UC3407  Calochortus leichtlinii M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC36458  Calyptridium monospermum Susan H. Euing 1982-6-5 12 Lassen Base of northeast slope, Gallatin Peak, approx. 1000 ft. from summit. Comment
  CHSC36441  Calyptridium umbellatum Margaret E. Halloran 1982-6-5 8 Lassen Northeast base of Gallatin Peak 1000 ft from the top. Comment
  CHSC80256  Calyptridium umbellatum Jeanne Boze 1981-6-13 111 Lassen On roadbed and northeast slope of Gallatin Peak. 1950 Comment
  UC72577  Calyptridium umbellatum Milo S. Baker 1890-1 Lassen Milford Comment
  UC773930  Calystegia occidentalis subsp. occidentalis L. R. Short and Wm. Gansberg 1936-7-3 S- 469 Lassen Lassen Forest , Lassen <National> Forest (Burgess Spring Experiment Range) 1848 Comment
  RSA339996  Calystegia polymorpha Noel Holmgren, Patricia K. Holmgren, A. H. Holmgren 1980-7-9 9581 Lassen Surprise Valley, 23.7 km (14.7 mi) south of Fort Bidwell. 1402 Comment
  SEINET3992160  Camassia quamash A. A. Heller 1938-5-4 15140 Lassen 2 mi E of Westwood; Transition Life Zone 1494 Comment
  CAS-BOT-BC497551  Camassia quamash subsp. breviflora Elmer I. Applegate 1934-5-4 8936 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC497553  Camassia quamash subsp. breviflora L. Beane; A. M. Vollmer 1953-7-1 92 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  HSC15435  Camassia quamash subsp. breviflora Jim Vaughn 1956-7-13 Lassen Drakesbad, Mt. Lassen Natl. Park 1738 Comment
  CHSC93245  Camelina microcarpa John Dittes; Scott Chamberlain 2004-6-28 1019 Lassen Modoc Plateau; Long Valley; ca. 4.4 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.6 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; near road. 1465 Comment
  POM38357  Camissonia andina Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  NY850975  Camissonia boothii subsp. alyssoides Mrs. C. C. Bruce 06 1898 2139 Lassen Shumway Comment
  SEINET3282785 Image available Camissonia boothii subsp. alyssoides Marcus E. Jones 1897-6-23 Lassen Amedee. 1219 Comment
  POM253278  Camissonia claviformis subsp. cruciformis A. A. Heller 1938-6-23 s.n. Lassen Midway between Mapes and Secret Valley on Hwy 395. 1372 Comment
  RSA144902  Camissonia claviformis subsp. cruciformis G. I. Stage, R. Thorp 1959-6-20 59 -116 Lassen 9.6 miles north of Litchfield Comment
  CAS-BOT-BC160832  Camissonia minor Arnold Tiehm 1980-5-29 5752 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel 1231 Comment
  HSC68913  Camissonia minor Gary Schoolcraft 1980-6-11 265 Lassen W of Wendel 1220 Comment
  JEPS93828  Camissonia parvula Vernon H. Oswald and Lowell Ahart 1998-6-4 9141 Lassen s of Constantia (Red Rock Road at its junction with Highway 395); Red Rock Road 1365 Comment
  HSC30037  Camissonia tanacetifolia D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19153 Lassen 3 mi. N of Westwood Comment
  NY852073  Camissonia tanacetifolia J. T. Howell 1973-8-1 50209 Lassen Headwaters of Baxter Creek, Canadian Zone forest, east slope of Diamond Range south of Susanville 2164 Comment
  NY852074  Camissonia tanacetifolia Mrs. C. C. Bruce 06 1898 2203 Lassen Susanville Comment
  NY852070  Camissonia tanacetifolia A. R. Kruckeberg 1954-6-22 3322 Lassen 6 miles south of Likely on Highway 395 Comment
  POM38369  Camissonia tanacetifolia subsp. quadriperforata F. H. Hillman 1897-7-12 s.n. Lassen Chat. Comment
  CAS-BOT-BC160868  Camissonia tanacetifolia subsp. tanacetifolia M. S. Baker; Frank Nutting 1894-8-21 s.n. Lassen Near Eagle Lake 1524 Comment
  CAS-BOT-BC160874  Camissonia tanacetifolia subsp. tanacetifolia Peter H. Raven 1962-5-28 17875 Lassen 11.6 miles north of Litchfield Comment
  CHSC91201  Capsella bursa-pastoris Lowell Ahart; John Dittes 2005-6-2 11919 Lassen Near bunkhouse, 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
  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
  UC197292  Cardamine breweri Franklin P. Nutting Lassen Pine Creek Comment
  CHSC99732  Cardamine oligosperma Lowell Ahart; John Dittes 2008-6-20 14942 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 7.0 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC18447  Carex abrupta George Wilson Gillett 1957-7-21 867 Lassen Lassen Volcanic National Park. Swale below (north of) summit of trail between Juniper Lake and Cameron Meadow. 2118 Comment
  CAS-BOT-BC17909  Carex angustata Leo Whitney 1934-7-31 1972 Lassen Bridge Creek Camp. 1737 Comment
  CHSC112416  Carex angustata Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18769 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
  UC1776659  Carex aquatilis var. aquatilis Jenn Atchley 1993-5-5 1 Lassen Along willow creek, in watering gap, petroglyphs. 1219 Comment
  CAS-BOT-BC18104  Carex athrostachya John Thomas Howell 1973-7-10 49780 Lassen Sierra Nevada. Fredonyer Pass. 1737 Comment
  CAS-BOT-BC18105  Carex athrostachya John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49456 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  UC506936  Carex athrostachya George A. Fischer, Irwin H. Johnson 1933-7-12 F 237 Lassen Patterson flat 1737 Comment
  SEINET7550707 Image available Carex athrostachya John Thomas Howell 1934-7-7 12472 Lassen Pine Creek Flat. 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
  CHSC61064  Carex aurea Vernon H. Oswald; Lowell Ahart 1993-8-3 5742 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  CHSC113778  Carex davyi Barbara L. Wilson; Peter Zika 2011-8-7 16805 Lassen Highwy 44 near mile post 12.50, at junction with road 32N22 and road to Harney Valley. 1740 Comment
  SEINET11309924 Image available Carex davyi D. E. Lepley 2012-1 1 Lassen On the South flank of Whaleback Mt., about 3.5 air miles NNW of Christie Campground at Eagle Lake and about 500 feet from FS21 (Road 32N02), on the Pikes Point 7.5' quad. UTM (NAD83, Garmin GPSmap 60CS): 0680730 x 4498190 at the northernmost, 0680750 x 4498124 at the southernmost. Comment
  CDA33057  Carex densa T. C. Fuller 1966-7-2 14963 Lassen South side of road to Pittsville, 5.4 miles west of Little Valley Post Office. Northwest part of county. 0 Comment
  UC1748339  Carex disperma L. P. Janeway 1999-9-5 6575 Lassen NW corner of Upper Stephens Meadow (Upper Pine Creek near Stephens Camp); High Cascade Range 1900 Comment
  CHSC33051  Carex douglasii J. P. Smith; John Sawyer 1971-5-23 4664 Lassen Along Calif. 139, 1 mi. south of Jct. with road to Thermo. Comment
  UC1537637  Carex douglasii Gordon H. True Jr. 1939-6-15 996 Lassen w Grasshopper Lake; Bullard Lake Comment
  UC190403  Carex douglasii M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixey Valley Comment
  CAS-BOT-BC19776  Carex douglasii L. P. Janeway 1990-7-4 3766 Lassen Plumas National Forest. Milford Ranger District. East side of saddle, ca. 0.8 mile northeast of Meadowview Peak. 1981 Comment
  CAS-BOT-BC19778  Carex douglasii Clarence Roy Quick 1962-6-17 32 -18 Lassen sagebrush flat, north of DeLasmutt Ranch on old dirt road to Blacks Mountain E.F. Headquarters. 1615 Comment
  SEINET10823343  Carex douglasii Gordon H. True 1939-6-15 True 996 Lassen Bullard Lake west of Grasshopper Valley. Comment
  SEINET7557452 Image available Carex douglasii John Thomas Howell 1934-7-6 12450 Lassen Harvey Valley. Comment
  HSC95229  Carex echinata subsp. echinata Gordon Leppig, Tony LaBanca 1997-6-28 517 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC19979  Carex feta John Thomas Howell 1974-7-10 50557 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CHSC60783  Carex filifolia var. erostrata Vernon H. Oswald; Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 1.8 mi N of Hwy 44, between Poison Lake and Susanville. 1749 Comment
  HSC48223  Carex filifolia var. erostrata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19171 Lassen Harvey Valley near Cone Springs Comment
  JEPS87492  Carex filifolia var. erostrata Vernon H. Oswald and Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy. 44 (between Poison Lake and Susanville) 1725 Comment
  SEINET7558599 Image available Carex filifolia var. erostrata John Thomas Howell 1934-7-6 12451 Lassen Harvey Valley. Comment
  UCD140321  Carex filifolia var. erostrata Beecher Crampton 1960-6-20 5739 Lassen Harvey Valley, 6 miles north Bogard Ranger Station, Lassen National Forest. 1676 Comment
  CAS-BOT-BC34001  Carex filifolia var. filifolia Louella Bass 1973-4-13 EV 14 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CAS-BOT-BC21304  Carex fracta John Thomas Howell; Gordon H. True 1973-8-1 50176 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  CAS-BOT-BC21305  Carex fracta John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49451 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  CAS-BOT-BC28194  Carex hoodii George Wilson Gillett 1957-7-29 946 Lassen Trail between Butte Lake and Snag Lake, 1/4 mi above Butte Lake. 1859 Comment
  SEINET7561726 Image available Carex hoodii L. P. Janeway 2003-7-24 7917 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14. 1.1 km from Road 30N21, small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  UC1133501  Carex integra A. Simontacchi 1940-5-14 720 Lassen 4.1 mi wnw Aspen Well; Lassen National Forest, Halls Flat Quadrangle Comment
  HSC95182  Carex interior Gordon Leppig 1998-8-17 1055 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95183  Carex interior Gordon Leppig 1998-7-12 954 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CDA33106  Carex limosa Gordon Leppig, J. Cromwell 1997-7-27 610 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  CHSC114406  Carex microptera Don Lepley 2014-6-24 Lassen Lassen National Forest, Eagle Lake Ranger District. Two air miles east of Diamond Mountain summit, around landing at end of Road 28N52A. 2133 Comment
  UC1136940  Carex microptera George A. Fischer, Irwin H. Johnson 1933-7-12 F 237 Lassen Patterson Flat Lassen Forest 1737 Comment
  UC2015854  Carex microptera Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4447 Lassen Lassen Volcanic National Park. Lassen Peak, above parking area. Comment
  POM81434  Carex multicaulis Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC119737  Carex nebrascensis George Wilson Gillett 1957-7-22 881 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. 1850 Comment
  JEPS88524  Carex pellita Vernon H. Oswald and Lowell Ahart 1996-6-24 7892 Lassen Papoose Meadows Modoc Plateau (located 0.5 mi e of Eagle Lake Rd. (A1) and 2.5 mi s of Eagle Lake, souternmost spring on e side of meadow) 1633 Comment
  JEPS106522  Carex petasata L. P. Janeway 2004-6-26 8139 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18 1714 Comment
  SEINET7571315 Image available Carex petasata L. P. Janeway 2004-6-26 8153 Lassen Poison Lake 7.5' quad, High Cascade Range, about 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  UC1755280  Carex petasata Dean W. Taylor 2007-6-14 20126 Lassen stream channel draining Lower Gooch Valley into Gordon Valley [dry on this date in a very dry year, stream channel with fluvial geomorphology indicating flow in spring on average] 1828 Comment
  CAS-BOT-BC119055  Carex phaeocephala Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16326 Lassen Sedgy meadow along southern shore of Eagle Lake. Comment
  UC2031884  Carex praegracilis Nick Otting 2003-7-16 689 Lassen Modoc Plateau, Smoke Creek, 13.5 air miles east-southeast of Ravendale. Comment
  CHSC54424  Carex raynoldsii Vernon H. Oswald 1991-6-25 4695 Lassen Lassen Volcanic National Park. Butte Lake-Snag Lake Trail, just south of its junction with Butte Lake-Widow Lake Trail, in the northeast corner of the park. 1842 Comment
  CAS-BOT-BC118027  Carex rossii John Thomas Howell; Gordon H. True 1973-8-1 s.n. Lassen Headwater of Baxter Creek, Diamond Mts. 2164 Comment
  HSC48222  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19175 Lassen Harvey Valley near Cone Springs Comment
  CHSC66414  Carex simulata Vernon H. Oswald; Lowell Ahart 1996-6-17 7815 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau. Margin of a marshy pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  CHSC74311  Carex simulata James D. Jokerst 1991-5-28 3296 Lassen Survey for reroute of Hwy. 139 at the N end of Eagle Lake, seep E and adjacent to highway at spring shown on USGS map. Modoc Plateau. 1554 Comment
  HSC95227  Carex simulata Gordon Leppig 1998-7-12 953 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET6171441  Carex simulata CLM Team 2014-7-29 NV 030 -984 Lassen From Reno head north on 395, turn right onto Red Rock Rd. and proceed roughly 0.5-0.75 of a mile and park at dirt pull off on the right side of the road 1381 Comment
  SEINET13709202  Carex spectabilis G. Schoolcraft 1997-8-6 2670 Lassen Diamond Mountain, N slope 2317 Comment
  CHSC89751  Carex subfusca L. P. Janeway 2004-6-26 8169 Lassen High Cascade Range. Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat; Blacks Mountain Experimental Forest. Roadside ditch. 1790 Comment
  JEPS28384  Carex subfusca George W. Gillett 1957-7-26 911 Lassen lake shore near ne arm of Butte Lake; Lassen Volcanic National Park, Butte Lake 1844 Comment
  CAS-BOT-BC116616  Carex subfusca B. Clear 1938-7-13 s.n. Lassen Dersch Meadows, Lassen Park. 2016 Comment
  CAS-BOT-BC116618  Carex subfusca B. Clear 1938-7-14 s.n. Lassen Lily Ponds, Manzanita Lake, Lassen Park. 1781 Comment
  UC1142963  Carex utriculata A. L. Hormay 1941-6-17 24 Lassen near Westwood (Meadow Lake); Lassen National Forest 1615 Comment
  HSC95272  Carex vesicaria Gordon Leppig, Kai Neander, Juli Neander 1997-7-26 695 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95273  Carex vesicaria Gordon Leppig 1998-7-12 942 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95282  Carex vesicaria Gordon Leppig 1998-6-12 932 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC106570  Castilleja angustifolia K. Schierenbeck 2008-5-3 Lassen Fort Sage Mtns. 1439 Comment
  CAS-BOT-BC249341  Castilleja applegatei Gary Schoolcraft 1983-6-29 1044 Lassen Ash Valley 1554 Comment
  CAS-BOT-BC249340  Castilleja applegatei Gary Schoolcraft 1983-7-19 1097 Lassen S. slopes of Fredonyer Pk. 33-12-27 2255 Comment
  HSC93502  Castilleja applegatei subsp. disticha Gordon Leppig, Tony LaBanca 1998-7-13 965 Lassen Modoc National Forest, Blue Lake Ranch 1799 Comment
  CAS-BOT-BC249610  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49170 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC249613  Castilleja applegatei subsp. pinetorum G. Schoolcraft 1987-5-6 1699 Lassen North end of Eagle Lake near Stone Ranch 1554 Comment
  CAS-BOT-BC249622  Castilleja applegatei subsp. pinetorum John Thomas Howell 1934-7-9 12527 Lassen Harvey Valley Comment
  CHSC7750  Castilleja applegatei subsp. pinetorum Beverley J. Wise 1969-5-4 105 Lassen 4 mi. north of Susanville on Hwy 139 (Antelope Grade). 1371 Comment
  JEPS128167  Castilleja applegatei subsp. pinetorum M. C. Mahoney, J. A. Nash 2017-9-9 CA 350 -90 Lassen Fredonyer Mountain. Comment
  UC1374836  Castilleja applegatei subsp. pinetorum Noel H. Holmgren, John J. Fay, and Barton L. Bethers 1970-6-24 4372 Lassen 2 mi w Westwood (at edge of airstrip) 1554 Comment
  UC1924581  Castilleja applegatei subsp. pinetorum Debra Valov 2006-5-28 2006010 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1291 Comment
  UC1924599  Castilleja applegatei subsp. pinetorum Debra Valov 2006-5-28 2006009 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1291 Comment
  UC506917  Castilleja applegatei subsp. pinetorum George A. Fischer, Irwin H. Johnson 1933-7-14 F- 259 Lassen Lassen Forest 1783 Comment
  JEPS28820  Castilleja arachnoidea Frances Payne 1929-7-12 83 Lassen between Camp 1 and Lost Lake (s end of Warner Range, e slope); Warner Range 2286 Comment
  SJSU5841  Castilleja campestris J. W. Tilden 1958-6-27 1291 Lassen Madeline Comment
  JEPS74939  Castilleja campestris subsp. campestris T. I. and F. M. Chuang 1975-7-23 7552 Lassen 3.2 mi s Madeline (along Hwy 395) Comment
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Jun 3 2009
  SEINET10549093  Castilleja chromosa Mary Susan Taylor 1982-5-29 Taylor 4568 Lassen T22N R17E e/sw sec 23. Loyalton quad. In Sagebrush Scrub along dirt rd paral- leling Hwy 395 on its e side, ca. 0.5 mi n of 395 jct with Scott Rd, ca. 20 mi n of Reno. 5000 ft. 1524 Comment
  CHSC117183  Castilleja lacera Lowell Ahart; John Dittes 2016-6-7 21021 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC60852  Castilleja lacera Vernon H. Oswald; Lowell Ahart 1993-6-28 5575 Lassen Harvey Valley Rd. (33N02), 0.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1749 Comment
  JEPS85915  Castilleja lemmonii L. R. Heckard with R. Bacigalupi 1980-6-12 5260 Lassen ne of Westwood (near golf course) 1554 Comment
  JEPS76163  Castilleja linariifolia T. I. Chuang with Fei-Mei Chuang 1977-7-25 7660 Lassen 10 mi w Madeline Comment
  JEPS79327  Castilleja linariifolia T. C. Fuller 1980-8-5 20313 Lassen 7.4 km se Dodge Reservoir campground (along e side of Tuledad Road, on the e shore of Dodge Reservoir, ne of Ravendale) 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
  CDA41236  Castilleja linariifolia T. C. Fuller 1980-8-5 20313 Lassen Along east side of Tuledad Road, 7.4 km. southeast of the campground on the east shore of Dodge Reservoir, northeast of Ravendale. 0 Comment
  CAS-BOT-BC244896  Castilleja miniata Clare B. Hardham 1971-8-22 18382 Lassen Granitic slope west of Janesville Comment
  RSA46750  Castilleja miniata J. T. Howell 1934-6-10 11871 Lassen Janesville Comment
  CHSC5901  Castilleja miniata subsp. miniata R. Gein 1946-6-22 Lassen Webb's Camp, Eagle lake. 1557 Comment
  CAS-BOT-BC240999  Castilleja pilosa Alice Eastwood 1940-6-15 8318 Lassen Said Valley Comment
  RSA0037005  Castilleja pilosa Lowell A. Ahart, John Dittes 2008-6-19 14879 Lassen East bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC1483790  Castilleja pilosa Mary Meyer 1980-7-1 Lassen Champs Flat 1677 Comment
  CHSC60772  Castilleja tenuis Vernon H. Oswald; Lowell Ahart 1993-6-14 5524 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  CHSC64896  Castilleja tenuis Vernon Oswald 1995-6-26 6922 Lassen Modoc Plateau, Northern Juniper Woodland. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  JEPS107313  Castilleja tenuis Lowell Ahart, John Dittes 2005-6-1 11902 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  RSA0035396  Castilleja tenuis Lowell Ahart, John Dittes 2008-6-20 14944 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1137685  Castilleja tenuis L. R. Short and Wm. Gansberg 1936-6-8 S- 394 Lassen Burgess Spring Experimental Range; Lassen Forest 1743 Comment
  SJSU11528  Castilleja tenuis J. W. Tilden 1960-6-27 1514 Lassen by Moonlight Rd, 5 mi E of Westwood 1524 Comment
  CHSC80621  Caulanthus major var. nevadensis Vernon H. Oswald; B. Corbin, K. Earll, G. Schoolscraft 2001-6-2 10036 Lassen Northeast of Doyle in the Fort Sage Mtns, trail to top of mountin from the end of a $WD road. 1828 Comment
  JEPS123842  Caulanthus major var. nevadensis Lowell Ahart, John Dittes 2015-7-14 20329 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  SEINET5341299  Caulanthus pilosus F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  RSA339727  Ceanothus cordulatus F. R. Fosberg 1969-8-16 51426 Lassen (California Registered Historical Landmark 678) 10 mi. west of Susanville. Comment
  CHSC30565  Ceanothus prostratus Sori H. Shad 1970-7-9 22 Lassen Found in Pine area 6 mile east of E.L.B.S. 1524 Comment
  CHSC7726  Ceanothus prostratus Beverly J. Wise 1969-4-20 89 Lassen Big Springs; 1/4 mi. west of Hwy 144, approx. 8 mi. north of Susanville. 1341 Comment
  UC1281295  Ceanothus prostratus H. E. McMinn 1941-8-27 5402 Lassen 3.5 mi from Pine Cone Inn (5 mi from Newbieber [Neubieber?]); 5 mi from Neubeiber Comment
  HSC99160  Ceanothus prostratus Paul J. CaraDonna 2009-5-17 133 Lassen Vista Point, S of highway, 0.25 mi. S of mile marker 58 1524 Comment
  CHSC23565  Ceanothus velutinus W. O. Baum 1971-6-28 46 Lassen E slope of Gallatin Peak. 1950 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-BC52437  Ceanothus velutinus var. velutinus 1927-7-15 58 Lassen Lassen Forest, 1/2 mi. South of Bogard Ranger Sta. 1737 Comment
  CAS-BOT-BC52440  Ceanothus velutinus var. velutinus Brighton C. Cain 1925-8-24 115 Lassen Mt. Lassen Volcanic National Park 1 mi. below Drakesbad 1645 Comment
  CHSC91290  Ceanothus velutinus var. velutinus Lowell Ahart; John Dittes 2005-6-2 11943 Lassen Along a small stream, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1601 Comment
  JEPS42163  Ceanothus velutinus var. velutinus Brown and Wieslander 1928-6-16 Lassen Eagle Lake Comment
  CAS-BOT-BC184969  Cenchrus longispinus T. C. Fuller 1965-10-13 14198 Lassen On north side of old road to Susanville, 1 mile west of Johnstonville. Comment
  UC1717201  Centaurea stoebe subsp. micranthos T. C. Fuller 1962-8-28 9472 Lassen w. side of Hwy 395, 1.7 mi. s. of Doyle Comment
  CAS-BOT-BC106074  Centaurea virgata subsp. squarrosa Barrett Anderson 1986-7-9 3128 Lassen Road to Day, about 2.4 km N of Rte 299. 1065 Comment
  UCD130124  Centaurea virgata subsp. squarrosa Dan Marcum 1980-8-24 s.n. Lassen Big Valley. Comment
  RSA516348  Centaurium exaltatum Barbara Ertter 1987-7-24 7305 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  CAS-BOT-BC279593  Centromadia pungens subsp. pungens Gordon H. True 1973-8-22 7656 Lassen North shore of Honey Lake, ca. 5 miles east of Janesville and just west of Hartson Reservoir Comment
  UCD150404  Ceratophyllum demersum William Anderson 1963-6-12 s..n. Lassen Honey Lake Valley. Comment
  HSC26513  Cercocarpus ledifolius J. P. Smith, J. O. Sawyer 1972-5-6 5241 Lassen Lassen National Forest, Boundary Campground on Hwy. 89 S of Burney 1067 Comment
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Apr 29 2013
  UCD35729  Cercocarpus ledifolius Beecher Crampton 1960-6-18 5710 Lassen Southern Warner Mountains, vicinity of Blue Lake Ranch. 1981 Comment
  CHSC32986  Cercocarpus ledifolius var. ledifolius Robert Smallwood 1970-7-8 138 Lassen Approx. 300 yds. north of E.L.B.S. 1524 Comment
  CAS-BOT-BC276615  Chaenactis douglasii var. douglasii Louella Bass 1973-6-14 104 Lassen Elysian Valley 1325 Comment
  CHSC23518  Chaenactis douglasii var. douglasii Wayne O. Baum 1971-7-6 71 -50 Lassen Slope of Gallatin Peak. 2011 Comment
  JEPS5990  Chamaesaracha nana Frances D. Payne 1929-7-12 77 Lassen near Lost Lake (camp 1, se extremity of Warner Mountains); Warner Mountains 2286 Comment
  UC26091  Chamaesaracha nana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CDA43001  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart, John Dittes 2008-6-2 14913 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 7.0 miles (air) northeast of Bieber. Comment
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Oct 5 2019
  CHSC43335  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Thomas Howell 1974-7-9 533 Lassen Along the edge of road A1, about 4 miles north-west of Susanville. 1584 Comment
  JEPS114649  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
  UC1609091  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1993-7-8 5660 Lassen 1.9 mi n Hwy 44 (Pittville Rd., on se edge of lake, between the rr and the lake); Poison Lake 1709 Comment
  UC17811  Chamaesyce serpyllifolia M. S. Baker and Frank Nutting 1894-7-24 Lassen Willow Creek Comment
  CHSC6213  Cheilanthes gracillima P. Balch 1955-6-1 Lassen Silver Lake, Eagle Lake. 1981 Comment
  CHSC94958  Cheilanthes intertexta Donald E. Lepley 2006-6-18 Lassen Southeast of Dixie Valley, about 2.5 air miles west of Pat Morris Spring. Take County Road 404 southeast from Pittville area to Little Valley, then Road 35N05 (USFS 22) about 15 miles to Black Hole and junction with Road 35N06; follow the latter about one mile just onto Lassen National Forest land and walk north about 50 yards to low escarpment. 1591 Comment
  CHSC65306  Chenopodium album Vernon H. Oswald; Lowell Ahart 1995-8-14 7180 Lassen Modoc Plateau. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  POM312473  Chenopodium chenopodioides Verne Grant, Irving Schneider 1947-9-5 8368 Lassen NW shore of Eagle Lake, by Sam Webb s place (Spaulding). Comment
  CHSC60892  Chenopodium nitens Vernon H. Oswald; Lowell Ahart 1993-7-8 5659 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
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Nov 1 2014
  POM203791  Chenopodium pratericola J. T. Howell 1934-7-8 12499 Lassen Spalding s, Eagle Lake. Comment
  UCD130269  Chrysothamnus viscidiflorus Beecher Crampton 1954-5-11 1883 Lassen Beckwourth Pass. 1588 Comment
  CAS-BOT-BC105904  Chrysothamnus viscidiflorus subsp. viscidiflorus Elmer I. Applegate 1897-6-3 858 Lassen South end of Madeline Plains Comment
  CHSC42146  Chrysothamnus viscidiflorus subsp. viscidiflorus C. E. Laver 1985-8-14 Lassen Ca. 8.5 mi se of Madeline and 9 mi ne of Termo. Along roadsides. 2194 Comment
  JEPS103168  Chylismia claviformis subsp. cruciformis Beth Corbin 2002-5-1 1065 Lassen Honey Lake Valley, about 2 mi SE of Wendel. 1234 Comment
  UC1537660  Chylismia claviformis subsp. cruciformis Gordon H. True Jr. 1937-7-10 791 Lassen mesa Skedaddle 1493 Comment
  UC1602277  Chylismia claviformis subsp. cruciformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3399 Lassen Amedee Honey Lake Valley Comment
  RSA748313  Cichorium intybus K. M. Meyer, A. Townesmith 2007-7-19 133 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  SEINET10725178  Cichorium intybus Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 133 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  CHSC115576  Cirsium Lowell Ahart; John Dittes, Joe DiSalvo 2015-7-14 20322 Lassen On the south side of the levee road, about 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1260 Comment
  UCD159568  Cirsium D. S. Park 2011-6-27 305 Lassen Near Antelope Mt. 1999 Comment
  SEINET10940912  Cirsium Paul Gallian, Billy Joe Cox 1971-6-2 Gallian 475 Lassen Approx. 2 mi. N of Susanville, across Calif. Hwy. 139 from Lassen Jr. College, in grassland at edge of Jeffery Pine & Artemisia. 1341 Comment
  CAS-BOT-BC278091  Cirsium douglasii var. breweri Peter H. Raven; Otto T. Solbrig 1958-6-17 13280 Lassen Along United States Highway 395, 13.1 miles south of Ravendale Comment
  CDA1258  Cirsium inamoenum J. R. Keck Jr., D. L. Haws 1980-7-22 PDR# 330194 Lassen Ravendale, BLM rangeland. Comment
  CAS-BOT-BC280057  Cirsium neomexicanum T. C. Fuller 1980-8-5 20312 Lassen 0.4 km. east of the campground, east shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  CDA37705  Cirsium ochrocentrum Robin Breckenridge 2006-8-15 s.n. Lassen Madeline Plains, Westside Road, old Basque homestead. 0 Comment
  RSA127309  Cirsium remotifolium var. rivulare J. T. Howell 1952-7-11 28836 Lassen Just S of Oregon line on road to Smith River, Del Norte County Comment
  CAS-BOT-BC286302  Cirsium scariosum John Thomas Howell 1934-6-14 12153 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC286307  Cirsium scariosum John Thomas Howell 1976-7-20 52025 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC286310  Cirsium scariosum James Jokerst 1983-7-25 1894 Lassen Near Madeline Plains 1614 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
  HSC81804  Cirsium scariosum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6024 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
  JEPS109645  Cirsium scariosum Dean W. Taylor 2002-6-21 18176 Lassen Windmill Flat (lying ca. 1.5 mi NW of Snider Lake), north end of the flat near the base of the windmill 1706 Comment
  SEINET10474565  Cirsium scariosum Mary Merello 1993-6-27 Merello 745 Lassen Lassen National Forest at intersection of Forest Service Road 32N15 and Hwy. 94. Open conifer woodlands, dry. 1700 Comment
  CAS-BOT-BC286515  Cirsium undulatum T. C. Fuller 1965-10-13 14201 Lassen E. of rd. at the e. base of Dry Valley Ridge, Madelaine Plains, 3 mi. n. of paved road, 10 mi. w. of Termo Comment
  CHSC23510  Cirsium vulgare Wayne O. Baum 1971-7-6 71 -56 Lassen Slope of Gallatin Peak. 1981 Comment
  CHSC7631  Cirsium vulgare Beverley J. Wise 1968-8-23 16 Lassen 10 mi. N.W. of Susanville on the Las. Co. Rd. 201. 1798 Comment
  CAS-BOT-BC439003  Cistanthe monosperma Milo S. Baker 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC162636  Clarkia John Thomas Howell 1974-7-30 s.n. Lassen Diamond Mountain - Sierra Nevada 2286 Comment
  CHSC99129  Clarkia gracilis subsp. gracilis Lowell Ahart; John Dittes 2008-6-19 14887 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
  CAS-BOT-BC163165  Clarkia lassenensis Louella Bass 1983-6-10 6 -83 Lassen Lassen College Campus, Susanville Comment
  CHSC66394  Clarkia rhomboidea Vernon H. Oswald; Lowell Ahart 1996-6-17 7780 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of Hwy. 36 between the trail and highway bridges spanning the Susan River. 1432 Comment
  UC1537615  Clarkia rhomboidea Gordon H. True Jr. 1936-6-26 549 Lassen 2 mi e Eagle Lake (head of creek); Willow Creek 1584 Comment
  UC1587045  Clarkia rhomboidea G. Schoolcraft 1991-7-30 2194 Lassen e side Widow Mountain 1889 Comment
  CAS-BOT-BC440042  Claytonia perfoliata subsp. perfoliata Louella Bass 1973-4-23 25 Lassen Elysian Valley. 1325 Comment
  UC2013401  Claytonia rubra Debra Valov 2011-6-16 1113 Lassen Bieber; off County A2 c. 8 km east of Highway 299. Comment
  JEPS25528  Cleome platycarpa Rimo Bacigalupi with Lincoln Constance 1959-6-16 7142 Lassen 0.25 mi s U.S. Highway 395 junction with road to Smoke Creek (beside U.S. Hwy 395) 1341 Comment
  JEPS94360  Cleome platycarpa Vernon H. Oswald and Lowell Ahart 1997-5-7 8403 Lassen Smoke Creek Ranch Road 3.4 mi w of California-Nevada State Line; Smoke Creek Ranch Road 1420 Comment
  CAS-BOT-BC32956  Cleomella alata C. C. (Mrs.) Bruce 1898-6-1 2364 a Lassen Shumway Comment
  CAS-BOT-BC423197  Cleomella parviflora Arnold Tiehm 1980-5-29 5748 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles NNW of Wendel 1231 Comment
  JEPS42689  Cleomella parviflora Mrs. R. M. Austin and Mrs. C. C. Bruce Jun 1898 2364 a Lassen Shumway Comment
  UC83292  Cleomella parviflora Mrs. C. C. Bruce 2364 a Lassen Shumway Comment
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Dec 20 2007
  JEPS17733  Cleomella plocasperma Rimo Bacigalupi with G. T. Robbins 1955-7-21 5426 Lassen Rush Creek s. of Smoke Creek Ranch Rd. (17.5 mi. e. of U.S. 395 & 1.3 mi. w. of Nevada State line); Rush Creek 1353 Comment
  CHSC36452  Collinsia greenei Susan H. Euing 1982-6-6 6 Lassen Pine Creek below fish trap. Flood plain-dry lake bed area. Comment
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Jun 18 2018
  CHSC23569  Collinsia parviflora W. O. Baum 1971-7-6 38 Lassen E slope of Gallatin Peak. 1950 Comment
  CHSC35898  Collinsia parviflora M. S. Taylor 1982-5-7 4427 Lassen Reno Junction on Hwy 70 just e of Beckwourth Pass. 1524 Comment
  CHSC36478  Collinsia parviflora Margaret E. Halloran 1982-6-6 11 Lassen Pine Creek jst below fish trap where Pine Creek empties into Eagle Lake. Comment
  CHSC68769  Collinsia parviflora Vernon H. Oswald; Lowell Ahart 1997-5-27 8500 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
  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
  JEPS120877  Collinsia parviflora Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18737 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
  HSC63960  Collinsia parviflora Teresa Prendusi 1980-5-19 Lassen Saddle Rock. 1524 Comment
  RSA60368  Collinsia parviflora E. K. Balls 1950-5-9 15951 Lassen 6 miles south of Milford, Hwy 395. 1296 Comment
  SEINET10548304  Collinsia sparsiflora Mary Susan Taylor 1982-5-7 Taylor 4427 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
  UC2016541  Collinsia torreyi Richard Olmstead 1984-6-26 577 Lassen 2.5 miles east of junction of Forest Service Road and Red Rock Lookout Road (28N02). Comment
  CHSC59776  Collomia grandiflora Mary Meyer 1980-5-15 Lassen On slopes near creek along Secret Creek Canyon. 1371 Comment
  UC1137724  Collomia grandiflora L. R. Short and J. Warren 1936-1 S- 362 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1844 Comment
  UC1537483  Collomia grandiflora Gordon H. True Jr. 1938-7-9 906 Lassen near Horse Lake 1524 Comment
  CHSC23479  Collomia tinctoria Wayne O. Baum 1971-7-5 71 -11 Lassen E. slope of Gallatin Peak. 1981 Comment
  UC1601297  Collomia tinctoria Franklin P. Nutting Lassen Pine Creek Comment
  NY704016  Conringia orientalis N. H. Holmgren 1980-7-3 9471 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 1620 Comment
  SEINET11242313  Conringia orientalis N. H. Holmgren, P. K. Holmgren 1980-1 9471 Lassen Madeline Plains, a valley road 1.1 km (0.7 miles) W of Hwy 395, from a turnoff 10.3 km (6.4 miles) S of Madeline. 1620 Comment
  SEINET7127328  Convolvulus arvensis M. J. Williams 1974-7-29 74 -L-57 Lassen 2 mi. west of Hallelujah Junction, south of Highway 70 1494 Comment
  UC26324  Cordylanthus maritimus subsp. canescens J. Burtt Davy Jun 17 1897-Jun 24 1897 3396 Lassen Amedee Honey Lake Valley Comment
  CAS-BOT-BC401848  Corydalis caseana subsp. caseana John Thomas Howell; Gordon H. True 1973-8-1 50237 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC290390  Crepis acuminata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49462 Lassen Elysian Valley, west of Janesville 1325 Comment
  JEPS107790  Crepis acuminata Lowell Ahart, John Dittes 2005-6-2 11933 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  UC91865  Crepis acuminata T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  CAS-BOT-BC290391  Crepis acuminata G. L. Stebbins, Jr.; E. B. Babcock 1936-6-7 1763 Lassen Near summit east of Red Rock 1818 Comment
  CAS-BOT-BC290393  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2313 Lassen Black Mountain about a mile below the summit 1940 Comment
  CAS-BOT-BC376483  Crepis bakeri subsp. cusickii G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-14 2331 Lassen Along road half way between Bogard Ranger Station and Harney Valley 1630 Comment
  UC581208  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2216 Lassen just w ridge crest between Willow Creek Valley and Horse Lake 524 Comment
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Jul 18 2007
  POM230947  Crepis occidentalis E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1748 Lassen Ridge east of Red Rock. 1616 Comment
  UC1368788  Crepis occidentalis John L. Strother 1970-5-23 955 Lassen about 6 mi n Honey Lake 1280 Comment
  RSA647829  Crepis occidentalis Marion P. Harthill 1971-6-21 209 Lassen Noble Emigrant Trail Monument, Susanville Comment
  CAS-BOT-BC290822  Crepis occidentalis subsp. pumila Doris Kildale Gillespie 1930-5-13 9366 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC376460  Crepis occidentalis subsp. pumila James Jokerst 1983-7-23 1868 Lassen Near Madeline Plains 1614 Comment
  CHSC105239  Crepis occidentalis subsp. pumila Lowell Ahart; John Dittes 2010-7-31 16982 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  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
  CHSC93565  Crepis pleurocarpa Lowell Ahart; John Dittes 2005-6-2 11934 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  JEPS107791  Crepis pleurocarpa Lowell Ahart, John Dittes 2005-6-2 11934 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  UC296046  Crepis pleurocarpa E. B. Babcock and J. L. Collins 1926-7-21 89 Lassen 8 mi w Susanville (on hwy to Quincy) 1371 Comment
  POM70805  Cressa truxillensis Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  UC1542943  Crocidium multicaule G. Schoolcraft 1987-4-29 1686 Lassen Ash Valley RNA 1554 Comment
  UCD59991  Crypsis vaginiflora R. Tofsrud 1947-7-1 246 Lassen Between Bieber and Nubieber. Comment
  NY1153786  Cryptantha affinis H. D. D. Ripley 1943-6-14 5720 Lassen West of Susanville 4750 Comment
  NY1153787  Cryptantha affinis G. Schoolcraft 1990-6-12 2089 Lassen About 17 miles east of Ravendale in Pine Dunes RNA 1707 Comment
  NY1112275  Cryptantha ambigua B. J. Ertter 1987-6-16 7199 Lassen Skeedaddle Mountains on northeast side of Honey Lake; saddle on east side of Hot Springs Peak 2195 Comment
  SDSU20522  Cryptantha ambigua Nuri Benet-Pierce, John P. Pierce 2012-7-14 522 Lassen Between Poison Lake and Patterson Flats, in clearing by the rd, at the start to 35N08. 1724 Comment
  CHSC5035  Cryptantha circumscissa L. B. Barlow 1967-7-12 110 Lassen Vic. Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  UCD54568  Cryptantha circumscissa Ellen Dean; Dawn Cunningham 2005-10-25 2751 Lassen East of the town of Susanville. Property N of California Correctional Facility. 1248 Comment
  SEINET10455878  Cryptantha circumscissa Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 879 Lassen Collected 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. Comment
  POM73157  Cryptantha crassisepala var. elachantha Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.?] 1220 Comment
  JEPS95974  Cryptantha humilis Vernon H. Oswald and L. Ahart 1999-6-9 9743 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  UC1483850  Cryptantha humilis G. Schoolcraft 1979-5-13 50 Lassen on ridge top of Skedaddle mtns. Skedaddle Mtns. 2286 Comment
  JEPS97421  Cryptantha intermedia Vernon H. Oswald and L. Ahart 1995-6-19 6878 Lassen Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395 1383 Comment
  CHSC92722  Cryptantha torreyana L. P. Janeway 2005-7-3 8449 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  POM72228  Cryptantha torreyana Marcus E. Jones 1897-6-19 6862 Lassen Chat 1616 Comment
  UC1037251  Cryptantha torreyana Leo Whitney 1934-7-5 1787 Lassen ca 14 mi w Eagle Lake (near Harvey Valley Spring); Lassen National Forest, Harvey Valley 1737 Comment
  UC1587053  Cryptantha torreyana G. Schoolcraft 1991-7-30 2193 Lassen e side Widow Mountain 1889 Comment
  SEINET10497287  Cryptantha torreyana Mary Susan Taylor 1974-1 Taylor 280 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  JEPS107811  Cryptantha watsonii Lowell Ahart, John Dittes 2005-6-2 11949 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction 1498 Comment
  UC1584020  Cryptantha watsonii G. Schoolcraft 1990-6-12 2089 Lassen about 17 mi e Ravendale (in Pine Dunes RNA) 1706 Comment
  CHSC6214  Cryptogramma acrostichoides P. Balch 1955-6-1 Lassen Silver Lake, Eagle Lake. 1981 Comment
  JEPS90144  Cusickiella douglasii Dean Wm. Taylor with Glenn Clifton 1990-6-12 10879 Lassen Modoc Plateau, Ash Valley, Forest Road 39N08, just as road enters the valley (as traveling from Adin) Ash Valley; Modoc Plateau, , Forest Road 39N08 1554 Comment
  POM180742  Cycladenia humilis A. W. Kramer s.n. Lassen Prospect Peak, Lassen National Park Comment
  CHSC117527  Damasonium californicum Lowell Ahart; John Dittes 2016-7-13 21138 Lassen South edge of the dirt dam, 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
  CHSC99298  Damasonium californicum Lowell Ahart; John Dittes 2008-6-20 14941 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1731161  Damasonium californicum Dean W. Taylor 1974-6-14 3714 Lassen on Hwy. 44 ca. 2 mi. w. from junction w/ Pittville Rd. Poison Lake; Modoc Plateau 1615 Comment
  UCD61076  Danthonia unispicata L. Whitney 1935-6-24 Lassen Ashurst Mt., N of Harvey Valley, ca. 35 mi. NW of Susanville. Comment
  JEPS15484  Delphinium andersonii Joseph and Hilda W. Grinnell 1938-6-13 1098 a Lassen on a sage flat near Ravensdale; near Ravensdale 1554 Comment
  UC1136878  Delphinium andersonii L. R. Short 1936-5-12 S- 347 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1834 Comment
  UC619271  Delphinium andersonii J. and H. W. Grinnell 1938-6-13 1098 Lassen sage flat near Ravensdale 1554 Comment
  CAS-BOT-BC217332  Delphinium andersonii Leland S. Smith 1917-6-2 23 Lassen Parsnip Creek - Sec 35. 1524 Comment
  CAS-BOT-BC26673  Delphinium armeniacum A. A. Heller 1938-6-4 15149 Lassen one mile east of Fredonyer Pass on Highway #36, Arid Transition Life Zone 1706 Comment
  CAS-BOT-BC8991  Delphinium depauperatum Mrs. H. C. Cantelow 1949-6-11 8 Lassen East slope of Fredonyer Pass Comment
  CAS-BOT-BC10139  Delphinium menziesii Mrs. H. C. Cantelow 1949-6-11 7 Lassen Summit of Fredonyer Pass Comment
  RSA398661  Delphinium nudicaule Christopher Davidson 1975-6-6 2722 Lassen 3.9 miles from jct of county roads 204 and 205 on road 204 along Gold Run Creek, SW of Susanville. 1395 Comment
  HSC27052  Delphinium nuttallianum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19165 Lassen 3 mi. N of Westwood Comment
  HSC27054  Delphinium nuttallianum John Pratt 1970-6-11 5 Lassen Fredonyer Pass 1738 Comment
  CAS-BOT-BC194262  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1959-9-23 34888 Lassen Juniper Lake north end, Lassen Park 2057 Comment
  JEPS71178  Deschampsia cespitosa subsp. cespitosa Brown and Wieslander 71 Lassen Comment
  UC506928  Deschampsia cespitosa subsp. cespitosa George A. Fischer and Irwin H. Johnson 1933-7-14 F 244 Lassen Patterson Flat Lassen Forest, Patterson Flat 1737 Comment
  CAS-BOT-BC192740  Deschampsia danthonioides A. A. Beetle 1941-6-28 2799 Lassen 10 miles west of Chester Comment
  CAS-BOT-BC192741  Deschampsia danthonioides John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49499 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC192743  Deschampsia danthonioides Lassen 1927 G. S. Crew 1927-7-15 52 Lassen Lassen National Forest 1737 Comment
  UC1100291  Deschampsia danthonioides Malcolm A. Nobs and S. Galen Smith 1949-7-21 1059 Lassen 4 mi. n. Madeline Comment
  UC188945  Deschampsia danthonioides Milo S. Baker 1900-7-5 Lassen Dixie Valley Comment
  CAS-BOT-BC201814  Deschampsia elongata John Thomas Howell; Gordon H. True 1973-8-1 50181 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 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
  UC402624  Descurainia nelsonii Franklin P. Nutting Lassen Dixey Mts. Comment
  CHSC4810  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected at Eagle Lake Biology Station, e central shore of Eagle Lake. 1524 Comment
  CAS-BOT-BC43163  Descurainia pinnata subsp. brachycarpa John Thomas Howell 1934-6-10 11902 Lassen 3 miles south of Ravendale. Comment
  CAS-BOT-BC43263  Descurainia pinnata subsp. glabra P. Monnet 1913-7-1 812 Lassen Hot Springs Peak. 2438 Comment
  CHSC48325  Descurainia pinnata subsp. halictorum Vernon Oswald 1986-5-28 2053 Lassen Rd. 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  RSA716273  Descurainia sophia L. Ahart, John Dittes 2005-6-2 11925 -A Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4.75 miles (air) N of the intersection of Scott Road and Hwy 70, 6.2 miles (air) NW of Hallelujah Junction. 1460 Comment
  CHSC61163  Dicentra uniflora Vernon H. Oswald; Lowell Ahart 1993-5-12 5374 Lassen SW side of Hwy. 44, 0.9 mi NW of its intersection with A21 (to Westwood), at a large opening in forest. 1737 Comment
  CAS-BOT-BC500983  Dichelostemma multiflorum T. S. Brandegee 1892-7-30 s. n. Lassen Susanville Comment
  CAS-BOT-BC292260  Dieteria canescens Margaret Williams; Steven Williams 1974-7-26 74 -L-21 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC45007  Dieteria canescens var. shastensis Lowell Ahart; John Thomas Howell 1974-7-9 539 Lassen Near the south edge of Eagle Lake. 1584 Comment
  UCSB25961  Dieteria canescens var. shastensis Wilken, Dieter; Haller, John; Langford, A. 1968-9-12 Lassen Along California Highway 36, 11.2 miles east of Chester 1524 Comment
  CHSC63378  Dimeresia howellii V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6353 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  CHSC4977  Diplacus jepsonii D. L. Stites 1967-7-14 148 Lassen Collected at Silver Lake. 1828 Comment
  CAS-BOT-BC153675  Diplacus mephiticus M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  SEINET13702844  Diplacus mephiticus G. Schoolcraft 1980-5-7 225 B Lassen Honey Lake Island. 1219 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
  SEINET201638 Image available Diplacus mephiticus Arthur Cronquist, Arthur H. Holmgren 1959-1 8454 Lassen 25 mi NW of Reno Comment
  CAS-BOT-BC151432  Diplacus nanus Clarence R. Quick 1962-6-17 62 -22 Lassen Swains Hole, in sagebrush flat south of Blacks Mountain Experimental Station 1554 Comment
  CHSC13507  Distichlis spicata J. Pitts 1972-6-22 251 Lassen 150 yds. n of Eagle Lake Biology Station. Comment
  CHSC67075  Distichlis spicata Willis Ball 1969-6-19 11 Lassen Found in dry Eagle Lake basin about 1/2 mile N.E. of E.L.B.S. 1554 Comment
  CHSC7693  Distichlis spicata Beverley J. Wise 1969-5-23 129 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd 320. 1249 Comment
  UC60743  Distichlis spicata J. Burtt Davy June 17-24 1897 Lassen Amedee, Honey Lake Valley Comment
  SD7836  Dodecatheon Mrs. R. M. Austin August 1882 Lassen Kings Valley Comment
  CHSC36450  Dodecatheon alpinum Susan H. Euing 1982-6-4 4 Lassen Murrers Upper Meadow. Comment
  CHSC4945  Dodecatheon alpinum R. Carter 1967-6-23 549 Lassen 25 yds w of dam in Murrer's Meadow. Along rd to Murrer's Meadow. 1584 Comment
  UC1553397  Dodecatheon conjugens G. Schoolcraft 1988-4-25 1783 Lassen Ash Valley RNA/ACEC 16 mi e Adin; Ash Valley RNA/ACEC e of Adin 1554 Comment
  UC559941  Dodecatheon conjugens Leo Whitney 1935-6-10 3211 Lassen Camp 10 Fruit Growers Supply Company Camp 10, Fruit Growers Supply Company Comment
  UC1137648  Dodecatheon pulchellum A. Simontacchi 1940-5-10 695 Lassen 4.4 mi sse of B.M. 7310 on Blacks Mtn; Lassen National Forest, Halls Flat Quad. Comment
  CHSC23459  Downingia K. R. Stern 1973-4-18 5853 Lassen Drying vernal pool area, ca. 0.2 mi n of Hwy 44 on Pittsville Rd. Comment
  JEPS121239  Downingia bacigalupii Lowell Ahart, John Dittes 2013-7-22 18875 Lassen Around the man-made pond, about 150 yards N of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS21587  Downingia bacigalupii Calvin McMillan 1949-6-15 1543 Lassen w of Bieber (nw Lassen County (corner)) Comment
  POM312397  Downingia bacigalupii Verne Grant, Irving Schneider 1947-7-31 8209 Lassen Irrigation ditch NE quarter of George Williams section 19, Madeline Plain. Comment
  UC1483852  Downingia bacigalupii G. Schoolcraft 1980-7-15 313 Lassen n end Nelson Corral Reservoir 1804 Comment
  JEPS108448  Downingia bacigalupii Lisa Schultheis 1995-6-27 225 -95 Lassen Champ's Flat. N side of 33N16, 0.3mi from 33N06. 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
  UC890609  Downingia bicornuta var. bicornuta Elmer I. Applegate 1929-6-24 5883 Lassen just n Bieber (nw corner of Lassen County) 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
  RSA505420  Downingia insignis Rimo Bacigalupi, Mitchell, S. Galen Smith, G. Bacigalupi 1957-6-28 6000 Lassen Ditches along U.S. Highway 395 on Madeline Plains, 3.1 miles south of Madeline 1616 Comment
  CAS-BOT-BC266472  Downingia laeta Wm. Anderson 1960-6-16 s.n. Lassen Along county road 0.25 mile S of Mapes Ranch, Honey Lake Valley Comment
  CHSC75486  Downingia laeta Vernon H. Oswald; Lowell Ahart 1999-6-9 9756 Lassen Northeast of Susanville and 4.1 mi south of Biscar Wildlife Management Area on BLM 26030 at the water crossing on Secret Creek. 1347 Comment
  JEPS21909  Downingia laeta Malcolm A. Nobs and S. Galen Smith 1949-7-20 1047 Lassen Bieber, along Highway 299 Bieber Comment
  RSA0035918  Downingia laeta Lowell A. Ahart, John Dittes 2008-6-20 14928 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
  SBBG33614  Downingia pulchella H. and M. Dearing 1938-6-30 2224 Lassen ca. 50 mi W of Susanville 1219 Comment
  JEPS118282  Draba verna var. aestivalis Lowell Ahart, John Dittes 2011-6-20 17489 Lassen About 3 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  UCD99551  Drosera rotundifolia Barry Rice 2009-7-5 BR 090703 Lassen at Robbers Spring. Comment
  UC1609244  Drymocallis lactea var. lactea Vernon H. Oswald and Lowell Ahart 1993-6-28 5613 Lassen ne Poison Lake (n of Hwy 44 on Rd 33N06, nne of Burgess Meadow, on the sse flank of Harvey Mtn); Harvey Mtn., ne of Poison Lake, nne of Burgess Meadow 1798 Comment
  UC1561938  Eatonella nivea Barbara Ertter with Gary Schoolcraft 1987-6-16 7181 Lassen s-facing slope below ridge ca 1 mi w of Hots Springs VABM (on ne side of Honey Lake); Skeedaddle Moutnations, Honey Lake 1828 Comment
  JEPS120867  Elatine Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18752 -A 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
  RSA0105584  Elatine Lowell Ahart, John Dittes 2013-7-22 18883 Lassen 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
  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
  CHSC116197  Elatine californica Lowell Ahart; John Dittes 2015-7-13 20302 Lassen About 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1101532  Elatine triandra Verne Grant and Irving Schneider 1947-8-1 8223 Lassen w end Section 19 (irrigation ditch running sw into State Fish and Game nesting area); Madelaine Plain Comment
  CAS-BOT-BC113615  Eleocharis acicularis R. K. Gierisch; D. H. Esplin 1969-8-26 3596 Lassen Harvey Valley 1676 Comment
  CHSC112770  Eleocharis acicularis Lowell Ahart; John Dittes 2013-7-22 18880 Lassen Drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS88513  Eleocharis bella Vernon H. Oswald and Lowell Ahart 1996-6-24 7851 Lassen Papoose Meadows Modoc Plateau (ca 0.5 mi e of Eagle Lake Rd (A1) and 2.5 mi s of Eagle Lake, at pile of fenceposts on w side of meadow just s of cabins) 1633 Comment
  UC1567360  Eleocharis bella G. Schoolcraft 1989-7-18 1982 Lassen S of Clarks Valley Road near Bucks Spring 1874 Comment
  CAS-BOT-BC113361  Eleocharis engelmannii James D. Jokerst 1983-7-23 1873 Lassen Grasshopper Valley Quad, near Madeline Plains. 1614 Comment
  CHSC112798  Eleocharis macrostachya Lowell Ahart; John Dittes 2013-7-22 18848 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
  CHSC60450  Eleocharis macrostachya Mary Ann Showers 1992-6-13 2555 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  CHSC117286  Eleocharis palustris Lowell Ahart; John Dittes 2016-7-15 21215 Lassen About 300b yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) mortheast of Bieber, Big Valley. 1261 Comment
  HSC95170  Eleocharis suksdorfiana Gordon Leppig 1998-8-17 1045 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC803919  Elymus G. L. Stebbins Jr. with P. Dansereau, C. McMillan, and K. Narayan 1949-8-6 4008 Lassen 5 mi w Eagle Lake; McCoy Flat 1524 Comment
  CAS-BOT-BC203831  Elymus X hansenii David D. Keck; J. Clausen 1935-6-24 3751 Lassen 2 mi. S. of Ravendale 1464 Comment
  UC767490  Elymus X saundersii R. F. Hoover 1940-9-28 4631 Lassen Susanville Comment
  CHSC60798  Elymus cinereus Vernon H. Oswald; Lowell Ahart 1993-6-14 5543 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). On the N side of the road. 1566 Comment
  JEPS123868  Elymus cinereus Lowell Ahart, John Dittes 2015-7-14 20327 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CAS-BOT-BC227486  Elymus elymoides Clare B. Hardham 1969-8-28 17430 A Lassen West of Janesville Comment
  CAS-BOT-BC227488  Elymus elymoides John Thomas Howell 1934-7-10 12533 Lassen Between Harvey Valley and Patterson Flats Comment
  CAS-BOT-BC227492  Elymus elymoides Louella Bass 1973-6-3 EU 97 Lassen Elysian Valley 1325 Comment
  UCD61535  Elymus elymoides L. D. Whitney 1935-6-25 Lassen Ashurst Mt. Comment
  UCR17284  Elymus elymoides Frank C. Vasek 1975-7-11 750711- 35 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  SEINET10527886  Elymus elymoides Paul Gallian, David B. Dunn 1971-6-2 Gallian 515 Lassen 6 mi N of Hallelujah Jct on US hwy 395, in Artemesia tridentata, Jeffery pine, along high ridge & in sandy wash. 1402 Comment
  CHSC13858  Elymus elymoides subsp. elymoides George Ellmore 1973-6-25 735 Lassen 10 m. from water on west side of Pelican Point on West Eagle Lake. 1560 Comment
  CHSC6320  Elymus elymoides subsp. elymoides Nick Santamaria 1968-6-29 16 Lassen On the ELBS grounds. Comment
  CHSC7687  Elymus elymoides subsp. elymoides Beverley J. Wise 1969-5-23 136 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  UC1024794  Elymus elymoides subsp. elymoides Leo Whitney 1933-7-15 2229 Lassen ca 25 mi w upper end of Eagle Lake; Lassen National Forest, Hall's Flat 1737 Comment
  UC1136930  Elymus elymoides subsp. elymoides George A. Fischer and Irwin H. Johnson 1933-7-12 F 214 Lassen Lassen <National> Forest 1722 Comment
  JEPS126479  Elymus elymoides var. californicus Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-30 CA 350 -043 Lassen Take 139 towards Antelope Grade and take a right after passing the fire station. Continue on dirt road for less than 0.5 miles. Comment
  UCD62565  Elymus repens J. V. Langdon 1957-7-1 Lassen Susanville. Comment
  JEPS127709  Elymus spicatus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -163 Lassen Cold Springs Road North of Bryn Marr Ranch. Comment
  SEINET5642835  Elymus spicatus Fred W. Hoffman 1946-6-8 1822 Lassen Lava beds east of Karlo, CA.; 0 Comment
  UCR17282  Elymus spicatus Frank C. Vasek 1975-7-11 750711- 32 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  UCD62706  Elymus trachycaulus subsp. trachycaulus L. Whitney 1933-8-3 Lassen Near Slate Creek. 1889 Comment
  SEINET7727869  Ephedra nevadensis Unknown Lassen Susanville Comment
  CAS-BOT-BC81880  Ephedra viridis P. Monnet 1913-7-1 839 Lassen Hot Springs Peak 2133 Comment
  HSC1306  Ephedra viridis J. W. Bosworth 1965-5-1 31 Lassen 20 mi. N of Susanville on Hwy. 395 1220 Comment
  JEPS94703  Ephedra viridis Vernon H. Oswald and Lowell Ahart 1998-5-22 9103 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.5 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1371 Comment
  SEINET3868651  Ephedra viridis D. H. Norris, T. Nelson 1971-6-22 19306 Lassen Along Hwy. 395 about 4 miles east of Standish.; 0 Comment
  SEINET3868652  Ephedra viridis D. W. McNeal 1980-6-1 2337 Lassen Above Hwy. #139, 5.4 mi. n. of the jct. of Hwy. #36 in Susanville.; 0 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
  CHSC29866  Epilobium brachycarpum Robin L. Ondricek 1978-6-27 72 Lassen .6 mi n of Five Corners along road to ELFS. 1706 Comment
  CHSC89728  Epilobium brachycarpum L. P. Janeway 2004-6-26 8146 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18. 1714 Comment
  UC773933  Epilobium brachycarpum L. R. Short and J. Warren 1936-6-23 S- 454 Lassen Burgess Spring Experiment Range Lassen National Forest 1743 Comment
  JEPS119650  Epilobium campestre Lowell Ahart, John Dittes 2012-7-9 18285 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UC1594621  Epilobium campestre Vernon H. Oswald and Lowell Ahart 1992-7-16 5110 Lassen between Old Station and Susanville (s side of Hwy 44); McCoy Flat Reservoir, Bridge Creek 1691 Comment
  HSC95173  Epilobium ciliatum subsp. ciliatum Gordon Leppig, J. Cromwell 1997-7-27 617 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  JEPS119642  Epilobium ciliatum subsp. ciliatum Lowell Ahart, John Dittes 2012-7-9 18301 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS121238  Epilobium ciliatum subsp. ciliatum Lowell Ahart, John Dittes 2013-7-22 18856 Lassen 30 yards S of the man-made pond, about 120 yards N of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1191740  Epilobium ciliatum subsp. ciliatum Malcolm A. Nobs and S. Galen Smith 1949-8-20 1471 Lassen 1 mi s Milford (seepage area); Honey Lake Valley Comment
  UC1583987  Epilobium ciliatum subsp. ciliatum G. Schoolcraft 1990-7-11 2108 Lassen n Moon Lake (at reservoir edge); McCabe Spring 1669 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
  CHSC115607  Epilobium densiflorum Lowell Ahart; John Dittes 2015-7-13 20307 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
  UC303068  Epilobium glaberrimum subsp. glaberrimum Pearl Safford Lassen Susanville [uncertain locality] 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
  UC1609447  Epilobium oregonense Vernon H. Oswald and Lowell Ahart 1993-8-3 5741 Lassen just e Caribou Wilderness (e of Silver Lake, ca 13 air mi n of Lake Almanor); Cooper Swamp 1932 Comment
  UC1609446  Epilobium pallidum Vernon H. Oswald and Lowell Ahart 1993-7-8 5673 Lassen Halls Flat Rd (33N18) 1.4 mi ssw Pittville Rd (Lassen 111, 36N01) (ca 5.4 air mi nw of Poison Lake, bed of vernal pool on e side of rd) 1694 Comment
  RSA123008  Epilobium paniculatum L. R. Short, Wm. Gansberg 1936-8-11 S- 493 Lassen Lassen Forest, Burgess Spr. Exp. Range 1747 Comment
  CAS-BOT-BC56947  Equisetum arvense John Thomas Howell 1974-7-8 50476 Lassen Susanville 1295 Comment
  CHSC66368  Equisetum arvense Vernon H. Oswald; Lowell Ahart 1996-6-17 7821 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of a pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  CAS-BOT-BC57139  Equisetum hyemale subsp. affine John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49432 Lassen Elysian Valley, west of Janesville 1325 Comment
  SEINET4568218  Eragrostis cilianensis G. Schoolcraft 1998-8-4 2802 Lassen Along HWY 395 at Viewland Monument 1378 Comment
  CAS-BOT-BC213624  Eragrostis mexicana subsp. virescens John Thomas Howell 1976-7-19 51943 Lassen Susanville 1296 Comment
  SBBG115768  Eragrostis mexicana subsp. virescens J. T. Howell 1976-7-19 51943 Lassen Susanville 1296 Comment
  CHSC4266  Eremogone congesta K. R. Stern 1967-6-24 2422 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  JEPS124509 Image available Eremogone congesta L. Fleckenstein 1967-7-12 70 Lassen Collected 300 yds east of Hwy. 139, 15.2 Mi. S. E. of Adin, near Willow Creek Campground. Comment
  RSA0045087  Eremogone congesta Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC174199  Eremogone congesta var. congesta L. G. Bennett 1967-6-24 33 Lassen 0.5 miles from start of road 5.19 towards Murrers Meadow near Eagle Lake 1493 Comment
  RSA0057704  Eremogone congesta var. subcongesta Barbara Ertter 1987-6-16 7193 Lassen Skeedaddle Mountains on NE side of Honey Lake; saddle on E side of Hot Springs Peak. 2195 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
  CHSC6201  Eriastrum signatum M. West 1946-7-2 Lassen Spalding's, Eagle Lake. 1554 Comment
  UC23552  Eriastrum signatum M. S. Baker and Frank Nutting 1894-7-25 Lassen Eagle Lake 1524 Comment
  RSA0124146  Eriastrum signatum David B. Dunn 1956-7-3 11922 Lassen On Highway 395. Comment
  RSA0125158  Eriastrum signatum Marcus E. Jones 1897-6-22 9972 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  NY1012886  Eriastrum sparsiflorum W. W. Eggleston 1911-7-8 7191 Lassen Vicinity of Doyle Station 1290 Comment
  SEINET7356288  Eriastrum sparsiflorum Richard R. Halse 2004-7-21 6669 Lassen At junction of U.S. Hwy 395 and State Road A 26, ca 11 miles southeast of Milford.; 0 1274 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-BC286601  Ericameria bloomeri Clarence R. Quick 1964-8-1 64 -94 Lassen Cal Mt. east of Poison Lake 1767 Comment
  CAS-BOT-BC286603  Ericameria bloomeri R. K. Gierisch; D. H. Esplin 1969-8-27 3598 Lassen Lassen National Forest Comment
  UC1776699  Ericameria bloomeri G. Schoolcraft 1992-8-19 2249 Lassen About 1 mile east of Devil's Corral, HWY 36 1493 Comment
  UC76031  Ericameria bloomeri Milo S. Baker Lassen Big Valley, Lassen and Modoc Co. Big Valley Comment
  CAS-BOT-BC298170  Ericameria nauseosa var. oreophila Gary Schoolcraft 1984-9-26 1380 Lassen Painter Flat 1706 Comment
  CAS-BOT-BC298171  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile E of Termo 1645 Comment
  CAS-BOT-BC298173  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile E of Termo 1645 Comment
  CAS-BOT-BC298179  Ericameria nauseosa var. oreophila John Thomas Howell 1924-8-13 s.n. Lassen Near Doyle Comment
  CHSC65293  Ericameria nauseosa var. oreophila Vernon H. Oswald; Lowell Ahart 1995-8-14 7181 Lassen Modoc Plateau. Hwy. 395 9.1 mi N of Smoke Creek Ranch Rd., N of Susanville. Along this section of highway. 1359 Comment
  CAS-BOT-BC294182  Ericameria nauseosa var. speciosa Margaret Williams 1974-8-4 74 -L-71 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 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
  JEPS21495  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-27 4628 Lassen Susanville Comment
  JEPS21518  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass between Shaffer Mt. and Warren Peak Comment
  UC217115  Ericameria nauseosa var. speciosa H. M. Hall 1921-9-11 11681 Lassen s side of Honey Lake Valley Comment
  UC761818  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-27 4628 Lassen Susanville Comment
  UC773958  Ericameria nauseosa var. speciosa L. R. Short 1936-9-30 S- 504 Lassen Burgess Spring Experiment Range Lassen Forest 1755 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
  UC1776655  Ericameria parryi var. nevadensis G. Schoolcraft 1998-8-19 2803 Lassen N upper slope of Shaffer Mountain 1981 Comment
  CHSC78479  Ericameria suffruticosa Vernon H. Oswald 2000-7-31 9946 Lassen Spur road leading from Forest Road 28N15 to the small pond on the crest of Diamond Mountain. 2215 Comment
  POM33280  Erigeron aphanactis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  RSA517336  Erigeron aphanactis Barbara Ertter, Gary Schoolcraft 1987-6-16 7176 Lassen Skeeadaddle Mtns on the NE side of Honey Lake. E side of road over saddle on W side of range. 1646 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
  UC1118123  Erigeron aphanactis var. aphanactis E. Sawyer 1935-6-27 11506 Lassen Long Valley Sierraville Quad., Long Valley 1341 Comment
  SEINET8513002 Image available Erigeron bloomeri A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-5-28 s.n. Lassen Costantia Allotment. West of Peterson's 1490 Comment
  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
  SEINET201632  Erigeron bloomeri A. Cronquist, AH Holmgren 1959-6-17 8460 Lassen 50 mi SE of Susanville Comment
  CHSC105254  Erigeron bloomeri var. bloomeri Lowell Ahart; John Dittes 2010-7-31 17010 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC25088  Erigeron bloomeri var. bloomeri K. R. Stern 1967-6-24 2415 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC4947  Erigeron bloomeri var. bloomeri R. Carter 1967-6-23 545 Lassen Growing 10 yds off s side rd. 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
  CHSC87122  Erigeron bloomeri var. bloomeri L. P. Janeway 2001-6-20 7198 Lassen Modoc Plateau. Along '22' Road about 1.8 km west of Black Hole, about 11.9 km north-northeast of Harvey Mountain. 1500 Comment
  CHSC99139  Erigeron bloomeri var. bloomeri Lowell Ahart; John Dittes 2008-6-19 14894 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
  JEPS80680  Erigeron bloomeri var. bloomeri L. R. Heckard and T. I. Chuang 1981-6-10 5532 Lassen North Eagle Lake Campground Eagle Lake (nw corner of lake) 1524 Comment
  POM33272  Erigeron bloomeri var. bloomeri Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  CAS-BOT-BC297144  Erigeron concinnus var. concinnus Ella Dales Cantelow 1940-5-31 3086 Lassen e. of Bieber 1219 Comment
  CAS-BOT-BC295980  Erigeron divergens Clare B. Hardham 1961-6-17 7504 Lassen Baxter Creek south of Susanville 1524 Comment
  CAS-BOT-BC296849  Erigeron divergens John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49440 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 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
  JEPS127714  Erigeron divergens Alejandro Brambila, Michael Dolan 2016-7-20 CA 320 -169 Lassen Railroad trail north of Tule Mountain. Collection is North of gate on Modoc-Lassen county line. 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
  CAS-BOT-BC296850  Erigeron divergens Margaret Williams; Louella Bass 1972-10-22 EV 9 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 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
  CHSC112185  Erigeron elegantulus Dean Wm. Taylor 2012-6-7 21227 Lassen Modoc Plateau. Grass Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139. 1635 Comment
  RSA93190  Erigeron elegantulus F. W. Peirson 1926-6-24 6855 Lassen On Madeline Plain Comment
  CHSC105240  Erigeron filifolius var. filifolius Lowell Ahart; John Dittes 2010-7-31 17008 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC80592  Erigeron filifolius var. filifolius Vernon H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10035 Lassen Northeast of Doyle in the Fort Sage Mtns, trail to top of mountain from the end of a 4WD road. 1828 Comment
  CHSC93249  Erigeron filifolius var. filifolius John Dittes; Scott Chamberlain 2004-6-28 1016 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
  JEPS109853  Erigeron inornatus var. calidipetris Dean W. Taylor 2006-6-29 19558 Lassen vicinity Long Lake; Highway 44 at the junction of County Road A21, southwest quadrant, near the junction with Forest Road 31N89 1737 Comment
  UC485173  Erigeron inornatus var. inornatus T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  HSC42422  Erigeron inornatus var. inornatus Barbara Kelly 1977-8-8 547 Lassen Ash Creek Campground Comment
  CAS-BOT-BC295507  Erigeron linearis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch 2225 Comment
  POM39968  Erigeron linearis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  HSC5530  Erigeron philadelphicus M. S. Baker 1893-1 Lassen Vicker's Ranch, Big Valley, collected in the summer Comment
  CHSC105241  Erigeron pumilus subsp. intermedius Lowell Ahart; John Dittes 2010-7-31 16986 Lassen About 3,330 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  RSA700053  Erigeron pumilus subsp. 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 NNW of Harvey Mountain. 1640 Comment
  RSA768024  Erigeron pumilus subsp. intermedius L. Ahart, John Dittes 2010-7-31 16986 Lassen About 3300 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. 1521 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
  JEPS107464  Erigeron pumilus var. intermedius Lowell Ahart, John Dittes 2005-6-1 11853 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS22799  Erigeron pumilus var. intermedius George A. Fischer and Irwin H. Johnson 1933-7-12 F 209 Lassen Grass Valley Lassen Forest, Grass Valley 1700 Comment
  JEPS89669  Erigeron pumilus var. intermedius Dean Wm. Taylor with Glenn Clifton 1990-6-12 10883 Lassen Ash Valley along Ash Creek at the crossing of Road 527 (Forest Road 39N08), Modoc Plateau Ash Creek; Modoc Plateau, Ash Valley, Ash Creek 1554 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
  SEINET5333913  Eriogonum baileyi D. Tonenna 2007-8-20 s.n. Lassen Hwy 395, 6 mi. north of Halellujah Junction, west of road 1450 Comment
  CAS-BOT-BC241566  Eriogonum baileyi var. baileyi John Thomas Howell; Gordon H. True 1973-8-1 50163 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC241568  Eriogonum baileyi var. baileyi Margaret Williams; Steven Williams 1974-7-26 74 -L-25 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  JEPS57071  Eriogonum baileyi var. baileyi W. L. Jepson 1918-8-14 7995 Lassen e side, Madeline Plains, at base of foothills Madeline Plains 1615 Comment
  NY243326  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-1 4649 Lassen Johnstonville. Comment
  UC1409081  Eriogonum baileyi var. baileyi R. F. Thorne and C. W. Tilforth 1969-9-6 39260 Lassen ca. 0.7 mi se along Hwy 395 Milford (w of Honey Lake) 1280 Comment
  CHSC64804  Eriogonum caespitosum Vernon H. Oswald 1995-5-31 6795 Lassen Smoke Creek Ranch Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  CHSC7738  Eriogonum caespitosum Beverley J. Wise 1969-5-3 78 Lassen 3.4 mi east of junction with Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1584 Comment
  OBI48168  Eriogonum caespitosum Rhonda Riggins 1989-4-27 1634 Lassen US 395, 8.4 mi N Litchfield, 26.6 mi S Rav endale 1311 Comment
  SEINET6332092  Eriogonum collinum A. J. Cronquist, A. H. Holmgren 1959-6-17 8478 Lassen 1 mile south of Ravendale, 40 miles northeast of Susanville. 1615 Comment
  UC1477728  Eriogonum collinum Gary Schoolcraft 1979-6-19 73 Lassen n, along road Big Spring 1676 Comment
  CAS-BOT-BC255743  Eriogonum elatum var. villosum Clare B. Hardham 1969-8-28 17459 Lassen West of Janesville, Sierra Nevada Comment
  UCR90298  Eriogonum kearneyi G. R. Ballmer 1993-7-1 s.n. Lassen N end of Fort Sage Mtns 1542 Comment
  RSA125289  Eriogonum maculatum Peter H. Raven, Otto T. Solbrig 1958-6-17 13271 Lassen Along U.S. Highway 395, 19.0 miles south of Ravendale. Comment
  CAS-BOT-BC267344  Eriogonum marifolium var. marifolium G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2289 Lassen East slope of Thompson Peak, south of Janesville 2346 Comment
  RSA518445  Eriogonum microtheca var. ambiguum George K. Helmkamp 1990-9-23 D- 9 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  RSA78918  Eriogonum microtheca var. laxiflorum E. K. Balls, Percy C. Everett 1952-10-10 18143 Lassen 8 mi. SE of Ravendale, Hwy 395, Susanville to Alturas. 1280 Comment
  JEPS126478  Eriogonum microthecum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-18 CA 350 -069 Lassen Directly off Horse Lake Road, on either side of the road. Comment
  CDA22621  Eriogonum microthecum var. ambiguum L. Ahart 2003-8-17 10518 Lassen 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. Comment
  UC7867810  Eriogonum microthecum var. ambiguum R. F. Hoover 1940-9-28 4636 Lassen canyon n Leavitt Comment
  UC85949  Eriogonum microthecum var. laxiflorum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  NY803607  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 2003-9-22 2949 Lassen About 3 miles northwest of Constantia, CA 1 mile west on FS Road 24N22X 1417 Comment
  NY283744  Eriogonum nidularium R. F. Hoover 1940-9-29 4643 Lassen Pass between Shaffer Mountain and Warren Peak. Comment
  CAS-BOT-BC266364  Eriogonum nudum var. deductum Louella Bass 1973-6-14 EV 105 Lassen Elysian Valley 1325 Comment
  SEINET530760  Eriogonum nudum var. deductum Paul Opler 2008-8-6 Lassen West of Milford, nr. Laufman Campground. Comment
  RSA518563  Eriogonum nudum var. nudum George K. Helmkamp 1990-9-23 G- 11 Lassen N of Ravendale 1677 Comment
  JEPS126468  Eriogonum nudum var. pubiflorum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-27 CA 350 -071 Lassen Along Rice Canyon Road and into Rice Canyon. Comment
  UC1032183  Eriogonum nudum var. pubiflorum H. P. Hagge 1929-9-11 17 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC761785  Eriogonum nudum var. pubiflorum R. F. Hoover 1940-9-28 4629 Lassen Susanville Comment
  HSC68914  Eriogonum nudum var. pubiflorum Gary Schoolcraft 1979-7-3 117 Lassen 1.0 mi. NW of rest area on Hwy. 395 1570 Comment
  POM105328  Eriogonum ochrocephalum var. ochrocephalum Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  JEPS87369  Eriogonum ovalifolium var. nivale Vernon H. Oswald and Lowell Ahart 1993-6-28 5591 Lassen Harvey Valley Rd.(33N02) 1.7 mi n Hwy 44 (e of Poison Lake, e side of Grays Valley); Grays Valley 1719 Comment
  UC1609436  Eriogonum ovalifolium var. nivale Vernon H. Oswald and Lowell Ahart 1993-6-28 5591 Lassen Harvey Valley Rd.(33N02) 1.7 mi n Hwy 44 (e of Poison Lake, e side of Grays Valley); Grays Valley 1719 Comment
  OBI76940  Eriogonum ovalifolium var. purpureum Anthony Baniaga 2011-7-9 439 Lassen Lassen Natl forest. Windy Hollow. Pine Crk Valley quad. T31N R8E sec 15 NE of SE 1716 Comment
  HSC30039  Eriogonum spergulinum var. reddingianum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19162 Lassen 3 mi. N of Westwood Comment
  CAS-BOT-BC271959  Eriogonum sphaerocephalum var. halimioides Pauleen Broyles 1977-6-1 165 Lassen Spencer Basin, 8 km n of Herlong 1770 Comment
  NY283113  Eriogonum sphaerocephalum var. halimioides H. D. D. Ripley 1943-6-13 5710 Lassen South of Johnstonville 1325.9 Comment
  UC1483798  Eriogonum sphaerocephalum var. halimioides Teresa Prendusi 1980-7-14 Lassen along Ash Valley road about 15 mi w Madeline; Ash Valley 1524 Comment
  CAS-BOT-BC262733  Eriogonum sphaerocephalum var. sphaerocephalum John Thomas Howell 1934-6-10 11864 Lassen Honey Lake Valley, 37 miles s. of Susanville Comment
  CAS-BOT-BC262739  Eriogonum sphaerocephalum var. sphaerocephalum H. D. Ripley; R. C. Barneby 1943-6-13 5710 Lassen South of Johnstonville 1325 Comment
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  UC85705  Eriogonum sphaerocephalum var. sphaerocephalum T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  JEPS107833  Eriogonum strictum var. anserinum Lowell Ahart, John Dittes 2005-6-2 11984 Lassen North side of the poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.8 miles (air) northwest of Hallelujah Junction 1430 Comment
  RSA768778  Eriogonum strictum var. anserinum L. Ahart, John Dittes 2010-7-31 16989 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
  UC85812  Eriogonum strictum var. proliferum Brandegee June 1892 Lassen Susanville Comment
  CAS-BOT-BC267895  Eriogonum umbellatum A. M. Vollmer; L. Beane 1953-7-1 46 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  SEINET10479553  Eriogonum umbellatum Mary Susan Taylor 1974-1 Taylor 306 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC267816  Eriogonum umbellatum var. covillei Annie M. Alexander; Louise Kellogg 1942-8-21 3356 Lassen Below Golden Trout Resort, Cottonwood Creek, Cottonwood Lakes, southwest of Lone Pine, Sierra Nevada 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
  RSA0092311  Eriogonum umbellatum var. modocense Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31429 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  UC849718  Eriogonum umbellatum var. modocense A. A. Heller 1938-7-23 15190 Lassen 3 mi e Westwood Comment
  NY399396  Eriogonum umbellatum var. nevadense A. A. Heller 1938-6-23 15215 Lassen Between Secret Valley and Ravendale. Upper Sonoran Life Zone 1524.0 Comment
  RSA715993  Eriogonum umbellatum var. nevadense L. Ahart, John Dittes 2005-6-2 11980 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Rd. and Highway 70, 5.7 mi. (air) northwest of Halleluiah Junction. 1411 Comment
  UC1032336  Eriogonum umbellatum var. nevadense A. Simontacchi 1940-6-15 877 Lassen 1.6 mi ssw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC584410  Eriogonum umbellatum var. nevadense G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2310 Lassen w Milford (crest of range head of Stony Ridge); Stony Ridge 1930 Comment
  UC725577  Eriogonum umbellatum var. nevadense A. A. Heller 1938-6-23 15215 Lassen slope between Secret Valley and Ravendale Comment
  CAS-BOT-BC262363  Eriogonum vimineum John Thomas Howell 1934-6-10 11893 Lassen Horse Lake Comment
  CHSC117539  Eriogonum vimineum Lowell Ahart; John Dittes 2016-7-13 21132 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC12488  Eriogonum vimineum Carol Weld 1969-6-25 29 Lassen Murrer's Meadow. 1524 Comment
  CHSC84440  Eriogonum vimineum Lowell Ahart 2003-8-17 10516 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  HSC63561  Eriogonum vimineum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6006 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS117563  Eriogonum vimineum Lowell Ahart, John Dittes 2010-7-31 17018 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
  NY399826  Eriogonum vimineum G. Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade road west of Doyle Creek 1585.0 Comment
  UC412790  Eriogonum vimineum Franklin P. Nutting Lassen Adobe flat on n side Dixey Mts. Dixey Mts. Comment
  UC423672  Eriogonum vimineum David D. Keck 1930-7-23 951 Lassen Susanville Sierra Nevada, Susanville 1280 Comment
  UC526153  Eriogonum vimineum John Thomas Howell 1934-6-10 11850 Lassen 4 mi s Omira Comment
  UCR245457  Eriogonum vimineum Elizabeth A. Kempton 2007-8-15 511 Lassen Janesville, intersection of Hwy 395 and Sunnyside Road 973 Comment
  CAS-BOT-BC262355  Eriogonum vimineum David D. Keck 1930-7-23 951 Lassen Susanville 1280 Comment
  CAS-BOT-BC262360  Eriogonum vimineum H. D. Ripley; R. C. Barneby 1943-6-15 5763 Lassen N.-E. of Viewland 1341 Comment
  CAS-BOT-BC262361  Eriogonum vimineum Peter H. Raven; Otto T. Solbrig 1958-6-17 13272 Lassen Along United States Highway 395, 19.0 miles south of Ravendale Comment
  SD51226  Eriogonum vimineum D. F. Howe 1960-9-21 2994 Lassen 2 miles north of Janesville on #395 1280 Comment
  SEINET11933856  Eriogonum vimineum N. H. Holmgren, Holmgren, P. K. 1980-1 9493 Lassen Rye Patch Canyon Rd, 3.4 km (2.1m) E of US Hwy 395, 14.5 km (9mi) airline distance SE of Ravendale 1700 Comment
  UC86006  Eriogonum vimineum W. E. Bryant 1888-1 Lassen Comment
  CHSC66273  Eriophorum gracile Vernon H. Oswald; Lowell Ahart 1996-6-24 7888 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
  CHSC5210  Eriophyllum lanatum W. Vinyard 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  RSA647563  Eriophyllum lanatum Marion P. Harthill 1972-6-17 810 Lassen Ravendale 1768 Comment
  CHSC92740  Eriophyllum lanatum var. achilleoides L. P. Janeway 2005-7-3 8453 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  UC1136991  Eriophyllum lanatum var. achilleoides L. R. Short and J. Warren 1936-6-29 S 459 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1822 Comment
  UC566757  Eriophyllum lanatum var. achilleoides Loyd Swift 1928-6-12 Lassen Halls Flat Lassen National Forest, Halls Flat Comment
  CHSC25127  Eriophyllum lanatum var. integrifolium Paul Lyman 1970-5-2 27 Lassen Honey Lake Valley; Janesville. Found on Bald mountain, 75 yds. north of cattle guard at south entrance. Comment
  PASA2212  Eriophyllum lanatum var. integrifolium Frank W. Peirson 1926-6-24 Lassen Several miles southward from the Madeline Plain Comment
  UC1137628  Eriophyllum lanatum var. integrifolium A. Simontacchi 1940-6-5 816 Lassen 8.3 mi wnw of Harvey Valley Ranger Station; Lassen National Forest, Halls Flat Quadrangle Comment
  UC507013  Eriophyllum lanatum var. integrifolium George A. Fischer and Irwin H. Johnson 1933-7-12 F- 200 Lassen Grass Valley Lassen National Forest, Grass Valley 1697 Comment
  JEPS66448  Eryngium alismifolium L. R. Heckard and P. Rubtzoff 1971-8-4 2709 Lassen ca. 10 mi. n. Terms (along U.S. Hwy. 395) Comment
  SEINET8673757  Eryngium alismifolium G. L. Stebbins Jr., Dansereau, P.; McMillan, C.; Narayan, K. 1949-8-6 4000 Lassen Hog Flat, n.w. of Susanville. 1676 Comment
  SEINET8673813  Eryngium alismifolium Ornduff 1958-7-22 5014 Lassen along Highway 395, 6.6 miles north of Ravendale 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
  RSA121673  Erysimum capitatum var. capitatum L. R. Short, B. H. Short 1936-6-15 S- 437 Lassen Lassen Forest. Longs Well. 1713 Comment
  JEPS114375  Erysimum repandum Lowell Ahart, John Dittes 2008-6-20 14900 Lassen About 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CHSC91311  Erythranthe arvensis Lowell Ahart; John Dittes 2005-6-1 11900 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  CHSC7752  Erythranthe guttata Beverley J. Wise 1969-5-18 107 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. Comment
  CHSC7754  Erythranthe guttata Beverly J. Wise 1968-8-28 108 Lassen Edge of Crazy Harry Creek where crossed by Las. Co. Rd. 230, 6 mi. north of Hwy 36. 1645 Comment
  CHSC64897  Erythranthe latidens Vernon H. Oswald; Lowell Ahart 1995-6-19 6887 Lassen Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 1.7 mi e of Hwy. 395. Modoc Plateau. 1350 Comment
  CHSC14065  Erythranthe primuloides J. Grove 1973-7-25 Lassen Collected at Collemans Lake along fill dam of lake. 1524 Comment
  CHSC43496  Erythranthe primuloides Lowell Ahart 1974-7-9 521 Lassen In a meadow along the south shore of Eagle Lake. 1584 Comment
  CHSC60778  Erythranthe suksdorfii Vernon H. Oswald; Lowell Ahart 1993-6-14 5522 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  CAS-BOT-BC403150  Eschscholzia californica A. M. Vollmer; L. Beane 1953-7-1 103 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  UC1561401  Eschscholzia californica Barbara Ertter 1987-7-24 7297 Lassen ca 3/4 mi ene Beckwourth Pass (at end of old crumbling paved road) 1524 Comment
  CAS-BOT-BC403149  Eschscholzia californica Elmer I. Applegate 1923-9-30 4033 Lassen Constantia Comment
  CAS-BOT-BC403151  Eschscholzia californica Ira L. Wiggins; Dorothy B. Wiggins 1961-6-16 165311 Lassen Along Highway 299, overlooking Big Valley 1249 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
  SEINET11989048  Euclidium syriacum Unknown 1966-1 712 Lassen Frosty Acres ranch, at end of Albaugh Rd, 0.6 mi W of jct with Bassett Rd (ca 2 mi S of US 299 & 4 1280 Comment
  CHSC5248  Euphorbia crenulata L. Harman 1946-6-23 Lassen Eagle Lake. Near top of Roop Mt. 2133 Comment
  JEPS124375  Euphorbia serpillifolia subsp. serpillifolia Lowell Ahart, John Dittes 2015-7-13 20312 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC278436  Festuca idahoensis John Thomas Howell 1934-7-7 12471 Lassen Pine Creek Flat Comment
  CHSC60932  Festuca idahoensis Vernon H. Oswald; Lowell Ahart 1993-7-8 5664 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Woods between the road and the railroad. 1709 Comment
  JEPS123453  Festuca idahoensis Wilson Collison, Jaileen Merced 2015-8-5 CA 320 -142 Lassen Trap Mountain, Wing allotment. Highway 139 W (north) from Termo Grasshopper Road. Comment
  UC1609256  Festuca idahoensis Vernon H. Oswald and Lowell Ahart 1993-7-8 5664 Lassen 1.9 mi n Hwy. 44 (Pittville Rd (Lassen 111, 36N01), between the road and railroad, on se edge of Poison Lake); Poison Lake 1709 Comment
  UCR17280  Festuca idahoensis Frank C. Vasek 1975-7-11 750711- 31 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  UC1024944  Festuca rubra Leo Whitney 1935-6-27 3327 Lassen 1 mi n Camp 10, Fruit Grower's Supply Company; Lassen National Forest Comment
  CAS-BOT-BC278931  Festuca rubra George W. Gillett 1957-7-29 947 Lassen Lassen Volcanic National Park. Along trail between Butte Lake and Snag Lake 1859 Comment
  JEPS95090  Floerkea proserpinacoides Vernon Oswald and Lowell Ahart 1997-6-24 8650 Lassen s of Susanville just s of small ond on crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout Red Rock Lookout; crest of Diamond Mountain 2249 Comment
  RSA122218  Fritillaria atropurpurea K. e. Bradshaw 1939-5-27 232 Lassen Lassen Forest. S. end Black Mt. Experimental Forest, Plot 39-1. 1753 Comment
  HSC79827  Fritillaria recurva William E. Rodstrom 1975-5-23 Lassen Near Day in most NW township of Lassen, 0.5 mi. E of Cinder Pit Mine, N of Hwy. 299 1280 Comment
  CAS-BOT-BC304301  Gaillardia aristata T. C. Fuller 1965-8-25 14036 Lassen E side of Highway 395 to Doyle, 2.4 miles N of Hallelujah Junction Comment
  CDA5850  Gaillardia aristata T. C. Fuller 1965-8-25 14036 Lassen east side of Highway 395 to Doyle, 30 paces north of culvert # 45-00, 2.4 miles north of Hallelujah Junction. 0 Comment
  RSA180586  Gaillardia aristata T. C. Fuller 1965-8-25 14036 Lassen East side of Hwy. 395 to Doyle, 2.4 miles north of Hallelujah Junction 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
  CDA42123  Galium aparine T. C. Fuller 1963-7-15 10897 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  SEINET11616108  Galium boreale C. G. Gulling 1905-1 1542 Lassen Big Meadows 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
  JEPS58896  Galium trifidum var. pusillum John Thomas Howell 1959-9-23 34886 Lassen n end of lake Lassen Volcanic National Park, Juniper Lake 2057 Comment
  UCD55278  Gayophytum diffusum Ellen Dean 2006-5-15 3093 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1245 Comment
  SBBG126107  Gayophytum heterozygum L. Ahart, J. Dittes 2010-7-31 17025 Lassen ca 100 yards NE of 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 1520 Comment
  CHSC93686  Gayophytum racemosum Lowell Ahart; John Dittes 2005-6-1 11884 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
  POM203958  Gayophytum racemosum J. T. Howell 1934-7-7 12473 Lassen Harvey Valley. Comment
  POM38132  Gayophytum racemosum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  SEINET4172075  Gayophytum ramosissimum M. J. Williams 1974-7-26 74 - L-32 Lassen 2 mi. west of Hallelujah Junction, south of Hwy 70 1494 Comment
  HSC8435  Gentiana newberryi Fred J. Kindel 1955-8-1 Lassen Mt. Meadows Reservoir Comment
  POM253026  Gentiana newberryi A. A. Heller 1937-9-1 15341 Lassen About a mile east of Westwood. 1524 Comment
  UC725738  Gentianopsis simplex A. A. Heller 1942-9-7 16536 Lassen shore of Summit Lake, Lassen Volcanic Nat'l Park Lassen Volcanic Nat'l Park, Summit Lake Comment
  RSA454467  Geum canescens Roch Well 1923-7-1 s.n. Lassen 12 miles from Eagle Lake Comment
  RSA454250  Geum macrophyllum Roch Well 1929-7-1 s.n. Lassen [Unspecified] Comment
  UC1037208  Geum macrophyllum var. perincisum Leo Whitney 1933-8-14 1568 Lassen 8 mi nw of Eagle Lake (Lassen National Forest, Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  CHSC68869  Geum triflorum Vernon Oswald; Lowell Ahart 1997-6-24 8649 Lassen South of Susanville at the pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  JEPS114756  Geum triflorum Lowell Ahart, John Dittes 2008-6-19 14872 Lassen Along a small wash, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  JEPS60511  Geum triflorum Brown and Wieslander 1922-7-23 22 Lassen Eagle Lake, Martin Springs Eagle Lake; , Martin Springs Comment
  UCD39130  Geum triflorum Beecher Crampton 1964-6-25 7067 Lassen 25 miles n.w. Susanville State Hwy. 44, Bogard Ranger Station, Lassen National Forest. 1722 Comment
  CAS-BOT-BC143567  Geum triflorum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50668 Lassen NE. of Diamond Mt. 2255 Comment
  RSA91465  Gilia brecciarum Verne Grant 1955-6-8 9669 Lassen 3.6 mi n of Halleluja Jct. on hwy 395. 1311 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
  SEINET200250  Gilia capillaris Herbert L. Mason 1955-7-31 14643 Lassen Near Westwood Junction (railroad station 15mi west of Susanville) Comment
  CHSC71129  Gilia inconspicua Vernon H. Oswald; Lowell Ahart 1998-5-22 9107 Lassen Road to ORV parking area in Fort Sage Mtns. 0.5 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. On roadside banks. 1371 Comment
  NY964494  Gilia inconspicua var. sinuata W. W. Eggleston 1911-5-20 6743 Lassen Vicinity of Doyle Station 1290 Comment
  UC1584002  Gilia lottiae G. Schoolcraft 1990-6-12 2085 Lassen about 17 mi e Ravendale (in Pine Dunes RNA); e of Ravendale in Pine Dunes RNA 1706 Comment
  SD131882  Gilia salticola Barbara Ertter, Gary Schoolcraft 1987-6-16 7189 Lassen Skeedaddle Mountains on northeast side of Honey Lake, talus slopes at base of rimrock on south side of Hot Springs VABM 2286 Comment
  UC1583986  Gilia sinuata G. Schoolcraft 1990-6-12 2091 Lassen about 17 mi e Ravendale (in Pine Dunes RNA); Pine Dunes RNA, e of Ravendale 1706 Comment
  CHSC99290  Gnaphalium palustre Lowell Ahart; John Dittes 2008-6-22 15032 Lassen About 120 yards west of the road levee, on the banks of a small natural drainage, open meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  POM38258  Gnaphalium palustre Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CAS-BOT-BC302596  Gnaphalium palustre Clare B. Hardham 1971-8-22 18421 Lassen Diamond Mountain, north slope 2225 Comment
  CHSC60922  Gratiola ebracteata Vernon H. Oswald; Lowell Ahart 1993-7-8 5650 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  JEPS28800  Gratiola ebracteata George W. Gillett 1957-9-4 1126 Lassen e margin Widow Lake (near inlet, Lassen Volcanic National Park); Lassen Volcanic National Park, e margin Widow Lake 2072 Comment
  UC1533149  Gratiola ebracteata G. Schoolcraft 1986-7-28 1664 Lassen along edge Moll Res. (w of Ash Valley); w of Ash Valley 1606 Comment
  CHSC36464  Grayia spinosa Jeffrey R. Peek 1982-6-1 25 Lassen Ca. 10 yds e of Ravendale Rd, e of Horse Lake. Comment
  UCD98871  Grayia spinosa S. Stephens 1980-4-14 s.n. Lassen 1/8 mi. off Wendel Rd. on Brubeck spgs. Rd. Comment
  SEINET8770843 Image available Grindelia squarrosa var. serrulata G. Schoolcraft 1999-8-23 2880 Lassen Turnoff to Janesville along Hwy 395 Comment
  UCD98138  Gypsophila paniculata T. C. Fuller 1963-7-16 10923 Lassen Janesville. Comment
  CDA36783  Gypsophila paniculata D. B. Joley 1976-6-22 1 Lassen Janesville. 0 Comment
  CHSC118792  Hackelia amethystina L. P. Janeway; B. Castro 2017-7-2 12341 Lassen Northern High Sierra Nevada. Along the crest of the Diamond Mtns 4.0 air-km west of Diamond Mtn; at the junction of Skyline Motorway, Diamond Mtn Road, and Diamond Mtn Motorway. 2004 Comment
  SEINET10837176  Hackelia bella Katherine L. Morris 1973-5-25 Morris 245 Lassen Collected 13.7 mi NW of the junction of Hwy 36 & 44 on Hwy 44, in an area of yellow pine, fir and Ribes. Comment
  UC773869  Hackelia californica L. R. Short, J. Warren 1936-6-26 S 458 Lassen Burgess Spring Experiment Range; Lassen National Forest 1853 Comment
  CAS-BOT-BC231156  Hackelia cusickii Mrs. A S. Baldwin 1928-5-1 s.n. Lassen Coyote Flat, over ridge from Dixie Village 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
  UC1560393  Hackelia cusickii E. Joyal and D. Mehlman 1988-6-29 1296 Lassen Old Blue Lake Road w of present day road Old Blue Lake Road; Warner Mountains 1800 Comment
  CAS-BOT-BC314766  Helianthella californica var. nevadensis John Thomas Howell 1934-7-11 12561 Lassen Near Black's Lake Comment
  CHSC7647  Helianthus annuus Beverley J. Wise 1948-8-23 21 Lassen 5 mi. N.W. of Susanville of Las. Co. Rd. 201. 1371 Comment
  JEPS78105  Helianthus annuus G. W. Zamzow 1972-7-18 87 Lassen beside Hwy 395 16.8 mi s intersection with Highway 36 1280 Comment
  CHSC64756  Helianthus cusickii Vernon H. Oswald 1995-5-31 6798 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  SEINET11197274 Image available Hemizonella minima G. Schoolcraft 1997-6-26 2601 Lassen W of Hwy 395 between Janesville and Milford 1676 Comment
  UC1037238  Hesperochiron californicus Leo Whitney 1935-6-20 3253 Lassen Lassen Nat'l Forest, Fruit Grower's Supply Company, Camp 10 Comment
  JEPS1670  Hesperochiron pumilus G. S. Crew and C. S. Robinson 1927-6-10 11 Lassen <Norval> Flat near Westwood Junction; Lassen Forest 1747 Comment
  RSA122625  Hesperochiron pumilus L. R. Short 1936-4-28 S- 329 Lassen Harvey Valley. Lassen Forest. 1707 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
  CHSC23743  Hesperolinon micranthum M. S. Taylor 1974-7-10 272 Lassen Scattered on e side of Gallatin Beach Rd, ca. 3 mi s of Gallatin Beach on Eagle Lake, ca. 12 mi nw of Susanville. 1524 Comment
  JEPS17743  Hesperolinon micranthum Rimo Bacigalupi with G. T. Robbins 1955-7-21 5416 Lassen along Smoke Creek Ranch Rd. 6 mi e jnct. with U.S. 395; Bull Flat, Deep Creek 1428 Comment
  UC1094379  Hesperolinon micranthum R. C. Bacigalupi with S. Galen Smith 1957-6-28 5995 Lassen 6.0 mi n Madeline (on Highway 395) 1676 Comment
  UC1130239  Hesperolinon micranthum A. Simontacchi 1940-6-30 902 Lassen 2.6 mi s Ladder Butte; Lassen National Forest, Halls Flat Quad. 1684 Comment
  SJSU7861  Hesperolinon micranthum V. Hardham 1965-7-12 127 Lassen Willow Cr c. 13 mi SE of Adin (Siskiyou County) on State Rt 139 1463 Comment
  CAS-BOT-BC280678  Hesperostipa comata William Rothstrom 1975-6-9 s.n. Lassen Johnstonville. 1/4 mile south of Hwy. 395, west of airport 1264 Comment
  NY783479  Heuchera rubescens G. Schoolcraft 1983-6-28 1037 Lassen Wendel Canyon 1645.9 Comment
  POM360431  Hieracium albiflorum Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  UC1136852  Hieracium albiflorum George A. Fischer and Irwin H. Johnson 1933-7-14 F 269 Lassen Lassen <National> Forest 1737 Comment
  UC1069594  Hieracium argutum H. P. Hagge 1929-9-18 39 Lassen Logan Mountain Eagle Lake Quad., Logan Mountain Comment
  JEPS88432  Hieracium greenei Vernon H. Oswald and Lowell Ahart 1996-8-1 8129 Lassen Forest Rd. 28N56 (D-Line) ca. 0.6 mi nnw Dyer Mtn. Lookout (ssw of Westwood) 2011 Comment
  CAS-BOT-BC318712  Hieracium horridum Wm. Bridge Cooke 1938-9-17 11703 Lassen Canyon below Horse Camp, Mount Shasta 2133 Comment
  CHSC5213  Hieracium horridum M. West 1946-7-12 Lassen Silver Lake. 1981 Comment
  UCD18951  Hieracium nudicaule Raymond D. Ratliff 1965-8-5 43 Lassen Lassen National Forest, Harvey Valley Allot. (HV 20-14 'area'). 1725 Comment
  CAS-BOT-BC316040  Hieracium scouleri John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49465 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 Comment
  CHSC75503  Hippuris vulgaris Vernon H. Oswald; Lowell Ahart 1999-6-9 9737 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.3 mi west of Hwy. 395, springy marsh surrounded by sagebrush scrub. 1353 Comment
  JEPS124840 Image available Hippuris vulgaris B. Corwin 1964-6-30 119 Lassen 16 miles north of Susanville. Comment
  JEPS124841 Image available Hippuris vulgaris Joe Ammirati 1964-6-30 73 Lassen N. of Susanville 17 mi. on High. 139. Comment
  JEPS93830  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald and Lowell Ahart 1998-6-4 9140 Lassen s of Constantia (Red Rock Road at its junction with Hwy 395); Red Rock Road at its junction with Hwy 395 1365 Comment
  UCD85482  Hordeum brachyantherum L. Whitney 1935-3-28 Lassen Fruit Growers Supply Co. Camp #10. Comment
  JEPS95804  Hordeum brachyantherum subsp. brachyantherum Vernon H. Oswald and L. Ahart 1999-6-9 9751 Lassen Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area: T31N R15E SE1/4 Sect. 18, 4440 ft elevation, sagebrush scrub 1353 Comment
  UC1024652  Hordeum brachyantherum subsp. brachyantherum Leo Whitney 1933-8-2 2202 Lassen ca 8 mi nw Eagle Lake (Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  SEINET10663525  Hordeum brachyantherum subsp. brachyantherum Vernon H. Oswald, Lowell Ahart 1999-6-9 Oswald 9751 Lassen T31N R15E SE 1/4 Sect. 18. Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Comment
  CHSC25162  Hordeum jubatum L. E. Ray 1967-6-25 54 Lassen Ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  UC1137163  Hordeum jubatum August L. Hormay 1932-8-12 Lassen e edge Eagle Lake; Lassen National Forest, e edge Eagle Lake Comment
  SEINET10967353  Hordeum jubatum Billy Joe Cox, David B. Dunn Cox 3115 Lassen 6 mi N of Hallelujah Jct. on US Hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  UCD55288  Hordeum murinum subsp. glaucum Ellen Dean; Gary Schoolcraft 2006-5-16 3107 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
  RSA0092310  Horkelia fusca Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31431 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  UC1483792  Horkelia fusca subsp. tenella Teresa Prendusi 1980-7-1 Lassen Littel Antelope Valley, Bureau of Land Management 1676 Comment
  CAS-BOT-BC143985  Horkelia fusca var. tenella Clarence R. Quick 1962-6-17 62 -19 Lassen N. of DeLasmutt Ranch on Hwy. 44 along dirt road to Blacks Mountain E. F. Hdqrts. 1615 Comment
  CAS-BOT-BC537968  Horkelia tridentata var. flavescens Alice Eastwood 1912-8-22 1872 Lassen Morgan Spring, Butte Region Comment
  CAS-BOT-BC213004  Hosackia crassifolia John Thomas Howell; Gordon H. True 1973-7-31 50036 Lassen In areas of granitic rock on road from Janesville to Thompson Peak, Diamond Range 1737 Comment
  SEINET183889  Hydrophyllum capitatum var. alpinum L. Constance 1938-7-10 2325 Lassen 0.5 miles W of Fredonyer Pass. 1676 Comment
  UC1069096  Hydrophyllum capitatum var. alpinum A. Simontacchi 1940-5-10 692 Lassen 4.5 mi sse Black Mtn., B.M. 7310; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC614681  Hydrophyllum capitatum var. alpinum L. Constance 1938-6-10 2325 Lassen 0.5 mi w Fredonyer Pass 1676 Comment
  POM95280  Hymenolobus procumbens Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  SJSU8059  Hypericum anagalloides J. W. Tilden 1960-6-27 1523 Lassen 5 mi E of Westwood via Moonlight Rd 1524 Comment
  CHSC13636  Hypericum formosum var. scouleri 1974-7-10 283 Lassen Abundant along creek 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
  POM86608  Hypericum formosum var. scouleri Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  SD130459  Hypericum formosum var. scouleri John Thomas Howell, Gordon H. True and Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville. 1326 Comment
  UC124652  Hypericum formosum var. scouleri W. E. Bryant Lassen Comment
  CHSC7707  Idahoa scapigera Beverley J. Wise 1969-4-10 37 Lassen 1.5 mi. north on Hwy 139. 1341 Comment
  NY52524  Iliamna bakeri G. Schoolcraft 1983-8-22 1142 Lassen Along Ash Valley Rd. west of Madeline 1737.4 Comment
  CHSC13883  Ipomopsis aggregata subsp. formosissima S. Villard 1973-7-12 65 Lassen Gallatin Peak. 1066 Comment
  CHSC63410  Ipomopsis congesta subsp. congesta V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6354 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  JEPS121786  Iris missouriensis B. Castro and L. P. Janeway 2012-7-2 1936 Lassen Modoc Plateau. 32 air mi due E of Susanville, 12 mi E of Hwy 395 and 3 mi W of the NV border. East side of Skedaddle Mountains; large meadows along Skedaddle Creek, just upstream from Skedaddle Ranch. Comment
  UC2062876  Isoetes nuttallii Forrest Freund 2016-5-18 257 Lassen Hog flat reservoir. Comment
  CHSC117178  Isoetes orcuttii Lowell Ahart; John Dittes 2016-6-7 21016 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC77255  Isolepis G. Schoolcraft 1997-8-4 2675 Lassen W of Willow Creek Valley. 1554 Comment
  RSA126721  Iva axillaris subsp. robustior Peter H. Raven, Otto T. Solbrig 1958-6-17 13265 Lassen Along Hwy 395, 11.8 miles NE of Litchfied Comment
  SEINET10971179  Iva axillaris subsp. robustior Mary Susan Taylor 1982-8-19 Taylor 5022 Lassen T23N R17E ne sec 23? Beckwourth Pass quad. E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. Sagebrush Scrub; 4900 ft. 1493 Comment
  CAS-BOT-BC148542  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 miles west of Madeline. Comment
  HSC75599  Ivesia paniculata Thomas W. Nelson, Jane Nelson 1980-7-6 5984 Lassen Ash Valley along Adin-Madeline Rd., 16 mi. E of Adin 1555 Comment
  CHSC47521  Juncus balticus Lowell Ahart; John Thomas Howell 1974-7-9 542 Lassen At the south edge of Eagle Lake. 1584 Comment
  UC2490  Juncus balticus J. Burtt Davy Jun 17 1897-Jun 24 1897 3280 Lassen Tule Confederacy Honey Lake Valley Comment
  SEINET3877676  Juncus bufonius Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 9467 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi) south of Madeline.; 0 1620 Comment
  RSA0011564  Juncus bufonius Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46988 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line 1616 Comment
  CHSC113074  Juncus bufonius var. bufonius Lowell Ahart; John Dittes 2013-7-23 18907 Lassen On the southwest side of a man made pond, about 160 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS114384  Juncus bufonius var. congestus Lowell Ahart, John Dittes 2008-6-20 14958 Lassen In meadow, around a new pond, 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
  JEPS96098  Juncus dudleyi Vernon H. Oswald and Lowell Ahart 1996-6-17 7817 Lassen Bizz Johnson Trail at 6.0 milepost e Devils Corral Trailhead (trailhead located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 Comment
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Feb 14 2008
  HSC29691  Juncus hemiendytus var. abjectus D. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19271 Lassen Harvey Valley near Cone Springs Comment
  CHSC108000  Juncus hemiendytus var. hemiendytus Lowell Ahart; John Dittes 2011-6-20 17480 Lassen About 15 yards west of the stream, about 40 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
  CHSC68886  Juncus hemiendytus var. hemiendytus Vernon Oswald; Lowell Ahart 1997-6-24 8653 Lassen South of Susanville just south of the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. Meadow. 2249 Comment
  POM111106  Juncus mexicanus Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  UC1100948  Juncus mexicanus Malcolm A. Nobs and S. Galen Smith 1947-8-1 8230 Lassen irrigation ditch running sw into State Fish & Game nesting area on w end of Section 19 Madeline Plain Comment
  CHSC61072  Juncus nevadensis Vernon H. Oswald; Lowell Ahart 1993-8-3 5745 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. SW edge of the swamp. 1932 Comment
  HSC95328  Juncus nevadensis Gordon Leppig 1998-7-12 946 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS67038  Juncus nevadensis Brown and Wieslander 1922-7-23 77 Lassen Martin Springs Eagle Lake Comment
  JEPS87450  Juncus nevadensis Vernon H. Oswald and Lowell Ahart 1993-8-3 5745 Lassen ca. 13 (air) mi. n. Lake Almanor (s.w. edge of Cooper Swamp located e. of Silver Lake just e. of Caribou Wilderness); Cooper Swamp 1932 Comment
  UC1100991  Juncus nevadensis Malcolm A. Nobs and S. Galen Smith 1947-8-24 8266 Lassen nw shore Blue Lake (n Lassen County) Comment
  JEPS105651  Juncus occidentalis L. P. Janeway 2001-6-20 7192 Lassen High Cascade Range. South side of the junction of the ''22'' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain 1560 Comment
  UC1601837  Juncus parryi M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  UC1601819  Juncus tenuis M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixis Mts. Dixie Mts. Comment
  UC1133737  Juncus tiehmii A. Simontacchi 1940-6-5 815 Lassen 8.3 mi wnw Harvey Valley Ranger Station; Lassen National Forest, Halls Flat Quad. 1737 Comment
  CHSC117179  Juncus uncialis Lowell Ahart; John Dittes 2016-6-7 21013 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
  HSC95274  Juncus xiphioides Gordon Leppig 1998-7-12 945 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UCD133732  Juniperus californica Grady L. Webster; with Bot. 102 class 1989-5-13 7703 Lassen Scattered in sagebrush scrub on rolling slopes 2.5 mi E of Beckworth Pass. 1493 Comment
  CHSC13790  Juniperus occidentalis Anne Linda Brisk 1969-6-19 6 Lassen 1/4 mi NE of ELBS. 1554 Comment
  CHSC13798  Juniperus occidentalis Cathy Crittenden 1970-7-8 26 Lassen About 300 yds. From five corners on road to Mahogany Lake. 1767 Comment
  CHSC5037  Juniperus occidentalis L. B. Barlow 1967-7-16 131 Lassen Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  HSC1267  Juniperus occidentalis L. H. Myers 1963-4-10 40 Lassen 1.0 mi. S of Janesville 1280 Comment
  JEPS126564  Juniperus occidentalis Lowell Ahart, John Dittes 2016-6-7 20974 Lassen About 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  UC1134300  Juniperus occidentalis A. Simontacchi 1940-6-5 820 Lassen 8.0 mi wnw of Harvey Valley Ranger Station; Halls Flat Quad., Lassen National Forest 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
  SEINET10613513  Juniperus occidentalis subsp. australis Mary Susan Taylor 1982-5-29 Taylor 4570 Lassen T22N R17E e1/2 sw1/4 sec 23. Loyalton quad. In sagebrush Scrub along dirt road paralleling Highway 395 on its east side, ca 1/2 mile north of 395 jct with Scott Road, ca 20 miles northof Reno. 1525 Comment
  UCR4280  Juniperus occidentalis var. australis Frank C. Vasek 1965-8-31 650831- 04 Lassen On Calif. Hwy 139 near Willow Creek Campground (USFS), c. 57 mi north of Susanville 1524 Comment
  RSA597841  Juniperus occidentalis var. occidentalis F. C. Vasek 1964-9-12 640912 -8 Lassen Road to Karlo, 3.8 miles from its junction with the Litchfield - Leavit Road Comment
  UC1924194  Juniperus occidentalis var. occidentalis Debra Valov 2005-8-20 2005236 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UCR3792  Juniperus occidentalis var. occidentalis Frank C. Vasek 1964-9-13 640913- 01 Lassen Warner Mtns., c. 1 mi east of Blue Lake Comment
  CAS-BOT-BC81289  Juniperus osteosperma John Thomas Howell 1961-9-25 36969 Lassen East side of Beckwourth Pass 1554 Comment
  UCD133871  Juniperus osteosperma John Thomas Howell 1961-9-26 36969 Lassen Beckworth Pass east side. 1554 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
  RSA121075  Kelloggia galioides L. R. Short, D. Gish 1936-6-10 S- 379 Lassen Burgess Spr. Exp. Range. Lassen Forest. (MDM?) 1814 Comment
  SJSU11548  Kelloggia galioides J. W. Tilden 1960-6-27 1496 Lassen Westwood 1554 Comment
  UC1136752  Kelloggia galioides George A. Fischer and Irwin H. Johnson 1933-7-14 255 Lassen Lassen National Forest 1783 Comment
  UC889305  Kelloggia galioides C. L. Hitchcock 1940-5-26 6602 Lassen ca 12 mi n Fall River Mills, Shasta County (on Fall River); Fall River 1371 Comment
  UC1483872  Kochia americana G. Schoolcraft 1980-5-8 231 Lassen s. end Cal-Neva Lake 1219 Comment
  CHSC65307  Kochia scoparia Vernon Oswald; Lowelll Ahart 1995-8-14 7172 Lassen Modoc Plateau. Hwy. 395 crossing a flooded playa (Mud Flat) 1.8 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  JEPS97318  Kochia scoparia Vernon H. Oswald and L. Ahart 1995-8-14 7172 Lassen T30N R15E center N side Sec. 15, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 crossing a flooded playa (Mud Flat) 1.8 mi N of Smoke Creek Ranch Rd., N of Susanville 1348 Comment
  UC1024754  Koeleria macrantha Leo Whitney 1933-8-9 2298 Lassen ca 25 mi w of upper end of Eagle Lake Hall's Flat; Lassen National Forest, w of upper end of Eagle Lake 1737 Comment
  UC506998  Koeleria macrantha George A. Fischer and Irwin H. Johnson 1933-7-12 F 205 Lassen Grass Valley; Lassen Forest, Grass Valley 1699 Comment
  UCD86011  Koeleria macrantha L. Whitney 1935-6-24 s.n. Lassen Squaw Valley. Comment
  CAS-BOT-BC271327  Koeleria pyramidata Louella Bass 1973-6-3 92 Lassen Elysian Valley 1325 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
  CAS-BOT-BC340511  Lactuca serriola Margaret Williams; Steven Williams 1974-7-26 74 -L-6 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC5214  Lactuca tatarica subsp. pulchella 1944-8-11 Lassen Eagle Lake. 1584 Comment
  JEPS127275  Lagophylla ramosissima Lowell Ahart, John Dittes 2016-7-13 21109 Lassen 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC66374  Lagophylla ramosissima subsp. ramosissima Vernon H. Oswald; Lowell Ahart 1996-6-17 7782 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Along the trail at the 7 mile post on the N side of Hwy. 36 between the trail and highway bridges spanning the Susan River. 1432 Comment
  SEINET14188959 Image available Lamium amplexicaule L. L. Stitt 1984-5-25 s.n. Lassen Susanville Comment
  CHSC99283  Lasthenia glaberrima Lowell Ahart; John Dittes 2008-6-22 15041 Lassen About 20 yards west of the road levee, along a small natural drainage, open meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  JEPS89759  Lasthenia glaberrima Dean Wm. Taylor with Robert A. Price 1988-6-4 9771 Lassen 6 mi e of MacArthur (along Highway 299 at crossing of Frazer Creek, Fall River Valley, Pit River Watershed); Fall River Valley, Pit River Watershed 1036 Comment
  POM29621  Lathyrus Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  CHSC92742  Lathyrus nevadensis var. nevadensis L. P. Janeway 2005-7-3 8451 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  CHSC59691  Layia glandulosa Mary Meyer 1980-4-24 Lassen Shaffer Mt. 1432 Comment
  CHSC64757  Layia glandulosa Vernon H. Oswald 1995-5-31 6817 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 3.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  JEPS94833  Layia glandulosa Vernon H. Oswald and Lowell Ahart 1998-5-22 9109 Lassen 5 mi nne of Doyle (Road to ORV parking area in Fort Sage Mountains 0.6 mi e of Fort Sage Road); Fort Sage Mountains 1402 Comment
  UC30620  Layia glandulosa M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CDA8139  Layia glandulosa Vernon H. Oswald & Lowell Ahart 1998-6-4 9143 Lassen Spur road on north side of Red Rock Road, 0.6 mile east of Highway 395, south of Constantia. Comment
  UC55668  Lemna minuscula Mrs. R. M. Austin Jun 1894 Lassen Willow Creek Valley, Cold Springs Cold Springs; Willow Creek Valley, Cold Springs Comment
  HSC95315  Lemna minuta Gordon Leppig, Tony LaBanca 1997-6-29 526 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC71871  Lepidium appelianum Vernon H. Oswald; Lowell Ahart 1998-9-8 9580 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.). Roadside. 1258 Comment
  CAS-BOT-BC88740  Lepidium appelianum Mrs. H. C. Cantelow 1935-6-8 875 Lassen 6 miles north of Bieber. Comment
  CHSC112998  Lepidium campestre Lowell Ahart; John Dittes 2013-7-23 18886 Lassen Drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC112394  Lepidium chalepense Lowell 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. 1007 Comment
  HSC68797  Lepidium dictyotum Gary Schoolcraft 1980-5-7 221 Lassen Honey Lake Island, N shore 1220 Comment
  CAS-BOT-BC89168  Lepidium draba Louella Bass 1977-6-12 77 -4 Lassen Elysian Valley. Comment
  NY76542  Lepidium latifolium G. Schoolcraft 1984-7-31 1330 Lassen Along Highway 395 about 1 mile north of Ravendale Fire Station 1615.4 Comment
  UCD115696  Lepidium latifolium T. C. Fuller 1962-8-28 9478 Lassen 75 sq. ft. infestation on east side of road, Hwy 395 to Litchfield, 4.7 miles south of Ravendale, Madelaine Plains. Comment
  CHSC99742  Lepidium perfoliatum Lowell Ahart; John Dittes 2008-6-20 14934 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 7.0 miles (air) northeast of Bieber. 1263 Comment
  JEPS95756  Lepidium perfoliatum Vernon H. Oswald and L. Ahart 1995-6-19 6899 Lassen T30N R16E southeast corner Sect. 6, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395 1383 Comment
  SEINET10448290  Lepidium perfoliatum Mary Susan Taylor 1974-7-8 Taylor 259 Lassen Ca. 1 mi N of Honey Lake, ca. 1 mi S of Standish, Honey Lake Wildlife Refuge. Comment
  UCD149893  Lepidium perfoliatum V. S. 1971-5-11 s.n. Lassen Honey Lake Wildlife Management Area, field 1. Comment
  UCD63835  Leptochloa fusca subsp. fascicularis Chandler Jensen 1959-9-8 Lassen Honey Lake Valley near Standish. Comment
  CHSC29931  Leptosiphon ciliatus Robin L. Ondricek 1978-6-20 63 Lassen On the e side of the s end of Eagle Lake in the Gallatin Burn. 1.8 mi s of Five Corners. 2011 Comment
  CHSC91188  Leptosiphon ciliatus Lowell Ahart; John Dittes 2005-6-2 11936 Lassen Along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1600 Comment
  CHSC27663  Leptosiphon harknessii Robert A. Schlising 1978-7-1 3304 Lassen S of Eagle Lake at east side of Mahogany Lake. 2060 Comment
  SEINET3364444 Image available Leptosiphon harknessii Marcus E. Jones 1897-7-2 Lassen Susanville Comment
  UC1542923  Leucanthemum vulgare Gary Schoolcraft 1987-6-17 1746 Lassen about 3 mi e of Westwood; Hwy 36 1554 Comment
  HSC30081  Leucocrinum montanum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19264 Lassen Harvey Valley near Cone Springs Comment
  UC1134625  Leucocrinum montanum A. Simontacchi 1940-5-17 752 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quad. 1699 Comment
  UC1483858  Leucocrinum montanum G. Schoolcraft 1979-5-3 17 Lassen about 1 mi s Ravendale (at intersection of Horse Lake Road and Hwy 395) 1615 Comment
  UC1553405  Leucocrinum montanum Gary Schoolcraft 1988-5-11 1794 Lassen n of Said Valley Reservoir (along Hwy 139) 1676 Comment
  CAS-BOT-BC508366  Leucocrinum montanum Rhonda Riggins 1989-4-27 1650 Lassen US 395, 1.1 mile north Madeline, 8.8 mile south Modoc Co. line 1676 Comment
  CAS-BOT-BC508368  Leucocrinum montanum M. Lavin; K. Lavin 1982-5-16 4067 Lassen 1.5 miles east of Halleluja Jct., US 395, Sierra Nevada 1676 Comment
  HSC38587  Leucocrinum montanum J. P. Smith, J. O. Sawyer 1971-5-23 Lassen 3 mi. N of junction of Hwy. 139 and turnoff to Thermo Comment
  JEPS68548  Leymus cinereus W. L. Jepson 1918-8-2 7795 Lassen Constantia Honey Lake Valley 1219 Comment
  UC1037143  Leymus cinereus Leo Whitney 3335 Lassen Camp 10 <of> Fruit Grower's Supply Company Lassen National Forest Comment
  UCD64276  Leymus cinereus J. Earl Coke 1931-6-30 Lassen Lassen County. 1524 Comment
  RSA126619  Leymus condensatus A. Simontacchi 1940-6-30 946 Lassen Halls Flat: 8.6 miles W. of Burgees Spring 1700 Comment
  UCD87721  Leymus triticoides R. N. Raynor 1939-6-3 s.n. Lassen Susanville. Comment
  CAS-BOT-BC436030  Ligusticum grayi B. C. Cain 1925-8-24 106 Lassen 1 mi. below Drakesbad, Mt. Lassen Natio,al Park 1645 Comment
  SEINET4690760  Lilaea scilloides B. L. Wilson, D. Lytjen 2005-7-28 11484 Lassen Deep creek enar confluence with a smaller stream 1359 Comment
  UCD116467  Limnanthes alba subsp. alba W. W. Robbins 1926-4-17 535 Lassen Grass Valley. Comment
  CHSC59098  Limosella acaulis Vernon H. Oswald; Lowell Ahart 1992-8-25 5188 Lassen Grassy Creek at the E end of Snag Lake. Lassen Volcanic National Park. 1850 Comment
  UC1609110  Limosella acaulis Vernon H. Oswald and Lowell Ahart 1993-6-14 5508 Lassen Lassen A21 (32N02) 5.3 mi e of Lassen 105 (32N28Y) ca 7 mi (air) w Eagle Lake (near Summit Camp); w of Eagle Lake 1889 Comment
  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
  SEINET9337712  Limosella acaulis Robert Thorne, DeBuhr, Larry 1975-8-22 47206 Lassen Hwy 395 Comment
  UC1184062  Linanthus ciliatus Jean Langenheim 1957-6-26 4400 Lassen nw Said Valley, from areas adjacent ot 1937 chaparral quadrat, e part of Lassen County Said Valley Comment
  UC1025087  Linanthus harknessii Leo Whitney 1934-7-5 1788 Lassen ca 15 mi w Eagle Lake (near Harvey Spring); Lassen National Forest, Crater Mountain 2225 Comment
  UC1483841  Linanthus harknessii G. Schoolcraft 1980-7-16 314 Lassen near Nelson Corral Reservoir 1804 Comment
  CHSC1262  Linanthus pungens K. Chew 1954-7-6 Lassen North end of Eagle Lake. 1616 Comment
  CHSC29901  Linanthus pungens Robin L. Ondricek 1978-6-27 75 Lassen At Brockman Flat Lava Beds. 1584 Comment
  CHSC29952  Linanthus pungens Robin L. Ondricek 1978-6-27 75 Lassen At Brockman Flat Lava Beds on the w side of Eagle Lake. 1584 Comment
  CHSC60841  Linanthus pungens Vernon H. Oswald; Lowell Ahart 1993-6-28 5594 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  RSA715980  Linum lewisii L. Ahart, John Dittes 2005-6-2 11935 Lassen Along the poor dirt road, 1/4 mile W of the Anderson Ranch home, Long Valley about 4 3/4 miles air N of the intersection of Scott Road and Hwy 70, 6.5 miles air NW of Hallelujah jct. 1499 Comment
  CHSC4431  Linum lewisii var. lewisii K. R. Stern 1967-7-1 2472 Lassen Ca. 2 mi. S of S end of Eagle Lake. 1676 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
  SEINET10483062  Lithophragma brevilobum Mary Susan Taylor 1974-5-4 Taylor 228 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
  CHSC68765  Lithophragma glabrum Vernon Oswald 1997-5-27 8524 Lassen North of Susanville on Frest Route 38N04 0.4 mi south of Coyote Flat, 4.3 mi northeast of Hwy. 139. 1798 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
  OBI77066  Lithophragma glabrum Anthony Baniaga 2011-6-7 316 Lassen Lassen NF. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad T32N R7E sec 11 SW of NE 1747 Comment
  UC773886  Lithophragma glabrum L. R. Short 1936-4-28 S- 336 Lassen Burgess Spring Experiment Range , Burgess Spring Experiment Range (Lassen National Forest) 1767 Comment
  HSC63953  Lithophragma parviflorum Teresa Prendusi 1980-4-30 1113 Lassen Shaffer Mtn., 2 mi. W of Hwy. 395 and 28 mi. S of Ravendale 1616 Comment
  CHSC11773  Lithophragma tenellum Wayne O. Baum 1971-6-15 71 -1 Lassen South side of fire trail approx. 100 ft. from Rd. 5 at extreme S. E. corner of Gallatin Peak. 1920 Comment
  UC1136831  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 Comment
  UC506915  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 Comment
  UC131185  Loeflingia squarrosa var. artemisiarum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  UC1132218  Lolium temulentum A. Simontacchi 1940-6-13 855 Lassen 3.4 mi wsw Patterson Mountain (Lassen National Forest); Halls Flat Quad., Lassen National Forest Comment
  CHSC1962  Lomatium bicolor J. Wakeman 1963-5-11 Lassen Bieber. 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
  CHSC87108  Lomatium bicolor var. leptocarpum L. P. Janeway 2001-6-19 7186 Lassen High Cascade Range. Southeast edge of Long Lake (which is dry) at west end of Long Valley; 6.4 km north-northwest of Harvey Mountain. 1640 Comment
  JEPS105642  Lomatium bicolor var. leptocarpum L. P. Janeway 2001-6-19 7186 Lassen High Cascade Range. Southeast edge of Long Lake (which is dry) at west end of Long Valley; 6.4 km north-northwest of Harvey Mountain 1640 Comment
  JEPS19758  Lomatium bicolor var. leptocarpum Rimo Bacigalupi with S. Galen Smith 1957-6-28 6006 Lassen 5.9 mi S of Madeline 1615 Comment
  POM260287  Lomatium bicolor var. leptocarpum C. L. Hitchcock 1940-5-26 6648 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  CAS-BOT-BC211117  Lomatium canbyi B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6552 Lassen Just S of Ravendale 1580 Comment
  CHSC92830  Lomatium dissectum var. multifidum Lowell Ahart; John Dittes 2005-6-2 11930 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
  JEPS100465  Lomatium dissectum var. multifidum Dean W. Taylor 2001-6-28 17819 Lassen Diamond Mountains, Crystal Peak, along ridgeline at the summit 2377 Comment
  SEINET178371  Lomatium dissectum var. multifidum Marcus E. Jones 1897-6-25 Lassen Susanville. 1341 Comment
  SEINET8584736  Lomatium foeniculaceum subsp. macdougalii W. Harnach 2010-6-8 1243 Lassen 2 miles west of the California Nevada state line, north side of Fort Sage Road, northeast of Doyle, CA. 1219 Comment
  CHSC57338  Lomatium macrocarpum B. G. Clark 1987-4-15 21 Lassen Slope 60 ft north side of Paul Bunyan Rd. 0.5 mi east of jct with Paiute Lane, Susanville. 1280 Comment
  UC1123084  Lomatium nevadense var. parishii A. Simontacchi 1940-5-10 689 A Lassen 7.3 mi. w. Havey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  UC1137734  Lomatium nevadense var. parishii L. R. Short and Wm. Gansberg 1936-6-8 S- 400 Lassen Lassen Forest, Burgess Spring Exp. Range 1783 Comment
  UC1187705  Lomatium plummerae Tracey and Viola Call 1961-5-30 1961 Lassen about 3 1/2 mi S of Ravendale Comment
  CAS-BOT-BC217796  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6558 Lassen Just S of Ravendale 1580 Comment
  CAS-BOT-BC217798  Lomatium ravenii G. Schoolcraft No date on label 212 Lassen North of Shaffer Mountain 1356 Comment
  CAS-BOT-BC217800  Lomatium ravenii David D. Keck; J. Clausen 1935-6-24 3738 Lassen 2 mi. S. of Ravendale 1464 Comment
  UC1479584 Image available Lomatium ravenii Gary Schoolcraft 1980-5-6 218 A Lassen Honey Lake Island 1219 Comment
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Oct 26 2017
  UC1599737 Image available Lomatium ravenii T. Prendusi, M. Meyer 1980-5-1 Lassen s. Ravendale 1615 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
  RSA38457  Lomatium vaginatum P. A. Munz 1947-5-19 11880 Lassen Madeline 1677 Comment
  CHSC7677  Lotus corniculatus Beverley J. Wise 1969-5-23 59 Lassen 35.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  POM28313  Lotus crassifolius Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CDA27193  Lotus crassifolius L. E. Allen 1967-6-4 Lassen Pinecrest Ranch, 0.5 mile south of Susanville. 0 Comment
  SEINET3694577 Image available Lotus humistratus Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 9481 Lassen Madeline Plains, Westside Road, 9 km W of U.S. highway 395, 16 km NW of Termo 1615 Comment
  UC1137756  Lotus purshianus var. purshianus L. R. Short and J. Warren 1936-6-23 S- 447 Lassen Burgess Spring Experimental Range Lassen Forest Comment
  SEINET3559881 Image available Lotus tenuis Arthur Cronquist, Arthur H. Holmgren 1959-6-17 8474 Lassen Near Honey Lake, 1 mi SE of Milford, 26 mi SE of Susanville 1311 Comment
  SEINET7123961 Image available Lupinus andersonii E. A. Bourdo Jr. 1972-1 s.n. Lassen Lassen National Park Comment
  CHSC65101  Lupinus angustiflorus Vernon H. Oswald; Lowell Ahart 1995-7-24 7131 Lassen High Cascade Range. N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just of Pine Creek. 1950 Comment
  CHSC67218  Lupinus arbustus James D. Jokerst 1991-5-29 3302 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
  JEPS28489  Lupinus arbustus George W. Gillett 1957-7-29 956 Lassen near the Butte Lake Trail (above Snag Lake); , near the Butte Lake Trail 1859 Comment
  SEINET10490460  Lupinus arbustus subsp. arbustus Katherine L. Morris 1973-5-25 Morris 211 Lassen 9.6 miles n of milford on us 395 in an area covered with artemisia, purshia, And rabbit bush Comment
  SEINET10484731  Lupinus arbustus subsp. silvicola Paul Gallian, David B. Dunn 1971-6-2 Gallian 498 Lassen Ca 22 miles s of adin on cal hwy 139; in basalt; assoc.; Juniper, artemisia 1646 Comment
  CAS-BOT-BC208732  Lupinus argenteus var. heteranthus E. K. Balls 1950-5-9 15948 Lassen Along roadsides 6 miles south of Doyle. 1371 Comment
  CAS-BOT-BC208737  Lupinus argenteus var. heteranthus W. W. Eggleston 1927-7-14 21501 Lassen Reserboir above Grasshopper Valley, Lassen Forest 1500 Comment
  CAS-BOT-BC208766  Lupinus argenteus var. heteranthus Beeson 1927-7-11 21470 Lassen Bogard Ranger Station, Lassen Forest 1500 Comment
  CAS-BOT-BC208768  Lupinus argenteus var. heteranthus A. B. Clawson 1935-7-13 C- 213 Lassen 3 mi. SW of Madeline Comment
  JEPS65006  Lupinus argenteus var. heteranthus Frances D. Payne 1929-7-12 74 Lassen ridge above Lost Lake (northeastesrn Lassen County); Warner Moutnains, ridge above Lost Lake 2286 Comment
  NY736922  Lupinus argenteus var. heteranthus N. H. Holmgren 1978-6-11 8925 Lassen Painters Flat road, 31.2 km (19.4 mi) east of Ravendale and 25 km (15.5 mi) airline distance 1800 Comment
  NY736923  Lupinus argenteus var. heteranthus P. A. Munz 1947-5-20 11888 Lassen Milford 1265 Comment
  NY736931  Lupinus argenteus var. heteranthus J. H. Christ 1949-5-22 18218 Lassen 8 miles southeast of Doyle, along Highway 395 Comment
  UC1129448  Lupinus argenteus var. heteranthus A. E. Wieslander June 1929 109 Lassen Constantia; Sierraville Quad. Comment
  UC1137309  Lupinus argenteus var. heteranthus L. R. Short and Wm. Gansberg 1936-7-3 S- 471 Lassen Burgess Spr. Exp. Range; Lassen National Forest 1859 Comment
  UC865100  Lupinus argenteus var. heteranthus W. A. Archer 1938-6-16 6020 Lassen 5 mi w Doyle; w of Doyle Comment
  JEPS107915  Lupinus argenteus var. meionanthus Lowell Ahart, John Dittes 2005-6-2 11937 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1600 Comment
  HSC28310  Lupinus brevicaulis D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19280 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  JEPS79209  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
  CAS-BOT-BC196639  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  RSA616275  Lupinus caudatus David B. Dunn, Jeffrey Huber 1971-6-2 17748 Lassen 3 miles south of Hallelujah Junction, on US Highway 395, junction of US 395 and California 70. Comment
  SEINET10452632  Lupinus caudatus Mary Susan Taylor 1982-6-12 Taylor 4653 Lassen T25N R17E se sec 8. Doyle quad. In sandy Sagebrush Scrub, in Doyle, ca. 1/2 mi e of Hwy 395. Comment
  SEINET10490608  Lupinus caudatus subsp. caudatus Jeffrey Huber 1971-6-2 Huber 145 Lassen 6 mi. N of halleluja jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffrey pine along high ridge and in sandy wash. 1402 Comment
  SEINET10490707  Lupinus caudatus subsp. caudatus David B. Dunn 1956-7-3 Dunn 11919 Lassen Collected on rolling gravelly slopes, in spots of deeper soil and also in Runoff areas from the hwy. Comment
  POM23529  Lupinus confertus Marcus E. Jones 1897-6-16 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC169643  Lupinus lepidus var. confertus T. S. Brandegee 1892-6-27 Lassen Milford Comment
  NY747210  Lupinus lepidus var. confertus G. Schoolcraft 1982-7-14 782 Lassen Along Highway 395 near Janesville 1311 Comment
  SEINET8051629  Lupinus lepidus var. confertus M. J. Williams 1983-7-31 83- 126 -1 Lassen Roadside near Janesville 1280 Comment
  SFV11002  Lupinus lepidus var. confertus J. Turner, F. M. Ball 1962-7-13 1194 Lassen Roadside on Highway 395 near Milford. 1280 Comment
  CHSC14189  Lupinus lepidus var. lobbii M. S. Taylor 1974-7-10 271 Lassen Collected roadside, ca. 3 mi s of Gallatin Beach, ca. 3 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC99135  Lupinus lepidus var. lobbii Lowell Ahart; John Dittes 2008-6-19 14886 -A Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC507001  Lupinus lepidus var. lobbii George A. Fischer and Irwin H. Johnson 1933-7-12 F 203 Lassen Grass Valley; Lassen National Forest, Grass Valley 1700 Comment
  JEPS114625  Lupinus lepidus var. sellulus Lowell Ahart, John Dittes 2008-6-19 14886 Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  JEPS28491  Lupinus lepidus var. sellulus George W. Gillett 1957-9-4 1131 Lassen intersection of Widow Lake and Snag Lake trails (Butte Lake); Lassen Volcanic National Park, Butte Lake 1859 Comment
  UC126929  Lupinus leucophyllus M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  UC710905  Lupinus leucophyllus C. L. Hitchcock 1940-5-26 6614 Lassen Lave beds ca 12 mi n Fall River Mills (on Fall River); Fall River, Lava Beds 1371 Comment
  SEINET10488726  Lupinus leucophyllus Charles Piper Smith 1947-6-13 Smith 47448 Lassen Highway 299, adin, 1.3 mi west Comment
  SEINET11268214  Lupinus leucophyllus Vernon H. Oswald, Lowell Ahart 1993-6-28 5607 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake.; 0 1725 Comment
  NY747375  Lupinus leucophyllus var. leucophyllus H. D. D. Ripley 1943-6-13 5679 Lassen Milford 1265 Comment
  JEPS114708  Lupinus microcarpus var. microcarpus Lowell Ahart, John Dittes 2008-6-20 14969 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS103183  Lupinus nevadensis G. Schoolcraft 2000-4-26 2892 Lassen East slopes of Shaffer Mountain 1584 Comment
  CHSC5288  Lupinus obtusilobus 1944-7-26 Lassen Juniper Lake. 2055 Comment
  RSA0005616  Lupinus onustus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CHSC108001  Lupinus polycarpus Lowell Ahart; John Dittes 2011-6-20 17498 Lassen 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  JEPS118457  Lupinus polycarpus Lowell Ahart, John Dittes 2011-6-20 17498 Lassen 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  SEINET10871085  Lupinus polycarpus Marcus E. Jones 1897-6-26 Jones s.n. Lassen Susanville, perkin's ranch. 1463 Comment
  NY747611  Lupinus polyphyllus var. saxosus H. D. D. Ripley 1944-5-30 5982 Lassen 2 miles south of Madeline 1707 Comment
  HSC28312  Lupinus sellulus var. artulus D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19267 Lassen Harvey Valley near Cone Springs Comment
  HSC28314  Lupinus sellulus var. lobbii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19159 Lassen 3 mi. N of Westwood Comment
  SEINET10490893  Lupinus sellulus var. sellulus Billy Joe Cox 1971-6-11 Cox 3179 Lassen 8 mi. W of susanville, on calif hwy 36 along road cut in volcanic soil; pinus Jeffreyi forest. 1554 Comment
  CDA8224  Machaeranthera canescens T. C. Fuller 1964-10-8 12703 Lassen Head of Secret Valley, south of Ravendale. 0 Comment
  RSA252467  Machaeranthera canescens var. canescens R. F. Thorne, C. W. Tilforth 1969-9-6 39268 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  RSA518416  Machaeranthera canescens var. canescens George K. Helmkamp 1990-9-23 G- 8 Lassen N of Ravendale 1677 Comment
  UCSB48516  Madia Clare B. Hardham 1961-6-16 7451 Lassen collected at Gold Run Creek S of Susanville Comment
  POM253193  Madia bolanderi A. A. Heller 1937-9-1 15342 Lassen Wet ground in a Tamrack swamp about 1 mile E of Westwood. 1524 Comment
  CAS-BOT-BC343695  Madia elegans Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin's Ranch 1463 Comment
  SD132249  Madia elegans G. Helmkamp 1990-9-23 A 6 Lassen 3.0 miles east of Susanville, along State Road 36. 1340 Comment
  SEINET11601319 Image available Madia elegans Mrs. C. G. Gulling 1905-1 1530 Lassen Big Meadows Comment
  RSA252466  Madia elegans subsp. densifolia R. F. Thorne, C. W. Tilforth 1969-9-6 39262 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  CAS-BOT-BC344299  Madia exigua H. D. Ripley; R. C. Barneby 1943-6-13 5716 Lassen South of Johnstonville 1328 Comment
  JEPS126562  Madia exigua Lowell Ahart, John Dittes 2016-6-7 20992 Lassen 110 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-BC334692  Madia glomerata John Thomas Howell 1973-7-10 49783 Lassen Fredonyer Pass, Sierra Nevada 1737 Comment
  OBI55501  Madia glomerata David J. Keil, Kathleen Keil 1992-7-25 23607 Lassen Along hwy 36, 9.1 mi E of Plumas County line, W of Susanville Comment
  SJSU10452  Maianthemum stellatum H. L. Buckalew 1961-7-9 Lassen spring near Blue Lake, Warner Mts 1828 Comment
  POM37232  Malacothrix floccifera Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1616 Comment
  UC186080  Malacothrix glabrata unknown 1892-6-22 Lassen Honey Lake Comment
  HSC63963  Malacothrix sonchoides Teresa Prendusi 1980-5-30 Lassen Mapes Spring on hillside 1555 Comment
  CAS-BOT-BC348031  Malacothrix torreyi Louella Bass 1982-6-20 s.n. Lassen About 1 mile west of Karlo Comment
  CDA5693  Marrubium vulgare T. C. Fuller 1964-10-8 12704 Lassen West side of Highway 395 to Standish, 1 mile south of Secret Valley. 0 Comment
  CHSC6212  Marsilea vestita J. B. Kimsey 1946-6-24 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CHSC71221  Matricaria discoidea Vernon H. Oswald; Lowell Ahart 1998-6-4 9138 Lassen Red Rock Rd. at its junction with Hwy. 395 south of Constantia. 1365 Comment
  RSA715988  Medicago lupulina L. Ahart, John Dittes 2005-6-2 11966 Lassen 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. 1409 Comment
  JEPS94455  Melica fugax Vernon Oswald and Lowell Ahart 1997-6-24 8645 Lassen s of Susanville (near the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC593538  Melica stricta E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1771 Lassen Red Rock 1280 Comment
  CHSC30586  Melilotus indicus P. V. Caldwell 1972-6-30 270 Lassen Jct. of Horse Lake Rd. and Hwy. 395. Comment
  UC1594650  Mentha canadensis Vernon H. Oswald and Lowell Ahart 1992-7-16 5109 Lassen Bridge Creek entering McCoy Flat Reservoir (on the s side of Hwy 44 between Old Station and Susanville); Bridge Creek entering McCoy Flat Reservoir 1691 Comment
  JEPS107449  Mentzelia albicaulis Lowell Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  SFV2374  Mentzelia albicaulis I. L. Wiggins, D. B. Wiggins 1961-6-11 16340 Lassen 13.5 miles east of Susanville. 1240 Comment
  JEPS124816 Image available Mentzelia albicaulis Joe Ammirati 1964-6-30 70 Lassen N. of Susanville ca. 12.3 mi. on HW 139. Comment
  CHSC117538  Mentzelia congesta Lowell Ahart; John Dittes 2016-7-12 21150 A Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 miles south ofd 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
  CHSC60752  Mentzelia congesta Vernon H. Oswald; Lowell Ahart 1993-6-14 5537 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  CHSC117298  Mentzelia dispersa Lowell Ahart; John Dittes 2016-7-13 21124 Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  HSC15864  Mentzelia dispersa R. G. Means 1962-7-4 69 Lassen 15.5 mi. N of Susanville, Hwy. 139 1524 Comment
  RSA152663  Mentzelia dispersa I. L. Wiggins, Dorothy Wiggins 1961-6-10 16323 Lassen Along California Highway 36 abut 6 miles W of Sussanville. Comment
  CHSC13731  Mentzelia laevicaulis S. Villard 1973-7-18 54 Lassen Hwy. 139 4 mi. N of Susanville on E side of road. Comment
  SEINET5333248  Mentzelia laevicaulis R. H. Miller 1954-8-27 1116 Lassen On U.S. 395, 3 miles north of Doyle. Comment
  JEPS42757  Mentzelia montana W. L. Jepson 1918-8-2 7773 Lassen Beckwith Pass 1463 Comment
  UC1121656  Mentzelia montana Robert W. Gardner 1937-6-18 G 22 Lassen Halls Flat Quadrangle, Burgess Spring Experimental Range Comment
  JEPS95001  Mertensia ciliata Vernon Oswald and Lowell Ahart 1997-6-24 8617 Lassen 2.7 mi e of Lassen National Forest boundary (7.4 mi e of Gold Run Road (29N10), s of Susanville on n side of Diamond Mountain at an impoundment on the edge of Forest Road 29N43); Diamond Mountain, Forest Road 29N43 2036 Comment
  CAS-BOT-BC231081  Mertensia oblongifolia Margaret J. Williams; Gary Schoolcraft; Arnold Tiehm 1986-5-14 86- 39 -1 Lassen 1.5 mile W of turn to Dodge Reservoir, on road from Tuledad Canyon to Ravendale 1706 Comment
  SD8330  Micranthes odontoloma Mrs. R. M. Austin 1879-1 Lassen Lassen Peak Comment
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Apr 29 2013
  NY539941  Micromonolepis pusilla A. Tiehm 1986-5-12 10351 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
  CHSC60821  Microseris laciniata subsp. laciniata Vernon H. Oswald; Lowell Ahart 1993-6-28 5588 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. Meadow. 1719 Comment
  UC1136772  Microseris laciniata subsp. laciniata George A. Fischer and Irwin H. Johnson 1933-7-12 F- 195 Lassen Grass Valley (Dry Lake) Lassen National Forest 1694 Comment
  CHSC66235  Microseris nutans Vernon H. Oswald; Lowell Ahart 1996-6-24 7866 .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. On the W side of the meadow ca. 0.2 mi S of the cabins. 1633 Comment
  JEPS126531  Microseris nutans Lowell Ahart, John Dittes 2016-6-7 21022 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
  POM34993  Microseris nutans Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  SEINET10475172  Microseris nutans Mary Merello 1993-6-28 Merello 755 Lassen Lassen National Forest. At end of Forest Service Road 31N01 at lake. Pine woodland. 1740 Comment
  UC1070116  Microseris nutans Robert W. Gardner 1937-6-16 G- 14 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  CHSC112452  Microsteris gracilis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18741 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
  CHSC71094  Microsteris gracilis Vernon H. Oswald; Lowell Ahart 1998-5-22 9100 Lassen Hackstaff Rd. 1.0 mi south of Laver Crossing Rd., 0.2 mi north of Fort Sage Rd., ca. 3 mi north of Doyle. 1316 Comment
  UC24031 Image available Miltitzia glandulifera var. californica Mrs. C. C. Bruce 1898-6-1 21354 Lassen Madeline Plains; ; Madeline Plains, Lassen Co. Comment
  SEINET13764907  Mimetanthe pilosa M. J. Williams 1974-7-26 74 -L-29 Lassen 2 mi west of Hallelujah Junction, south of Hwy 70 1494 Comment
  JEPS10551  Mimulus breweri Brown and Wieslander 1922-7-30 47 Lassen near Martin Sprs. Comment
  SEINET230131 Image available Mimulus densus Noel H. Holmgren, Patricia K. Holmgren 1980-1 9512 Lassen Observation peak, S side of mountain, 18 km (11 mi) airline distance E of Ravendale 2190 Comment
  RSA252826B  Mimulus floribundus A. A. Heller 1938-6-22 15187 Lassen 1 mile south of Westwood. 1524 Comment
  CDA41793  Mimulus guttatus Gordon Leppig, T. LaBanca, L. Arguello 1997-6-29 533 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  HSC95336  Mimulus guttatus Gordon Leppig, J. Cromwell 1997-7-27 618 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CDA41794  Mimulus guttatus T. C. Fuller 1961-5-17 6961 Lassen Hot springs, Wendell. 0 Comment
  JEPS2648 Image available Mimulus jepsonii W. L. Jepson 1910-6-10 4112 Lassen Twin Lakes (Grassy Lake); ; Twin Lakes (Grassy Lake), Lassen Co. 2225 Comment
  UCD122727  Mimulus kelloggii K. Lui 1998-5-24 29 Lassen Lassen National Forest, unpaved road 1.5 km south of Poe Dam where State Route 70 crosses North Fork Feather River. 463 Comment
  UC125195  Mimulus layneae Baker and Nutting Lassen Big Valley Comment
  JEPS10776  Mimulus moniliformis Brown and Wieslander 1922-7-30 17 Lassen near Martin Springs Comment
  JEPS10777  Mimulus moniliformis Brown and Wieslander 1922-7-30 17 Lassen Martin Springs Comment
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Jun 4 2007
  HSC22945  Mimulus nanus var. mephiticus John Pratt 1970-6-27 48 Lassen 0.5 mi. E of Turtle Head 1220 Comment
  HSC63954  Mimulus nanus var. mephiticus Teresa Prendusi 1980-7-1 Lassen Champ's Flat 1707 Comment
  JEPS85744  Mimulus nanus var. mephiticus Roy E. Buck, Robert A. Price 1988-6-26 1032 Lassen ca. 30 air km nne Susanville (on subsidiary peak ca 0.5 air km n of main summit); Fredonyer Peak 2377 Comment
  LA209350  Mimulus nanus var. mephiticus A. A. Heller; P. B. Kennedy 1907-7-1 sn Lassen Near Old Chat Comment
  POM252823  Mimulus nanus var. mephiticus A. A. Heller 1938-6-22 15188 Lassen About 1 1/8 miles south of Westwood. 1524 Comment
  POM297719  Mimulus nanus var. mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  UC124340  Mimulus nanus var. mephiticus Gustav Eisen 1891-1 Lassen Honey Lake 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
  RSA536396  Mimulus pygmaeus Beth Corbin 1991-6-26 633 Lassen Big Merrill Flat. 14 miles NW of Susanville. 1790 Comment
  RSA536397  Mimulus pygmaeus Beth Corbin, Steve Klukkert 1991-6-11 623 Lassen Harvey Valley, just NNE of Harvey Station. 1690 Comment
  JEPS79150  Mimulus torreyi L. R. Heckard with R. Bacigalupi 1980-6-12 5255 Lassen ne Westwood (near golf course) 1554 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
  CHSC13637  Monardella odoratissima M. S. Taylor 1974-7-3 275 Lassen Abundant along roadsides ca. 5 mi s of Eagle Lake and Gallatin Beach. 1524 Comment
  UCD125203  Monardella odoratissima subsp. glauca John F. Sorenson 1986-7-5 s.n. Lassen 9 miles southeast of Termo, Bailey Creek drainage; Bailey Creek above Bailey Reservoir. Comment
  CHSC25160  Monardella odoratissima subsp. pallida L. B. Barlow 1967-7-1 61 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road. 1554 Comment
  CHSC45231  Monardella odoratissima subsp. pallida P. V. Caldwell 1972-7-8 269 Lassen Eagle Lake. Rd 32N02 about 2 mi from Summit Camp. Comment
  CHSC63392  Monolepis nuttalliana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6315 Lassen Cold Springs near Clarks Valley Rd. (Lassen 510) ca. 11 mi E of Madeline. 1871 Comment
  OBI77205  Monolepis nuttalliana Anthony Baniaga 2011-7-23 462 Lassen Lassen NF. Poison Lake. Poison Lake quad T32N R7E sec 4 1700 Comment
  SDSU5609  Monolepis nuttalliana D. F. Howe 1964-7-31 3903 Lassen Modoc National Forest 10.2 miles from entrance on road from Likely. 1768 Comment
  CHSC60764  Montia chamissoi Vernon H. Oswald; Lowell Ahart 1993-6-14 5509 Lassen Lassen A21 (32N02), 5.3 mi E of Lassen 105 (32N28Y), near Summit Camp, ca. 7 mi (air) W of Eagle Lake. Common in shallow water and on wet soil along a streamlet draining into a pond located in a small meadow surrounded by open pine woodland with an understory of sagebrush. 1889 Comment
  UC1136741  Montia chamissoi A. Simontacchi 1940-5-21 763 Lassen 4.1 mi sse of Blacks Mountain (Lassen National Forest); Lassen National Forest 1737 Comment
  UC1609468  Montia chamissoi Vernon H. Oswald and Lowell Ahart 1993-6-14 5509 Lassen Lassen A21 (32N02) 7 air mi w Eagle Lake (5.3 mi e of Lassen 105 (32N28Y), near Summit Camp) 1889 Comment
  UC773867  Montia linearis L. R. Short, Wm. Gansberg 1936-6-8 S 392 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1743 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
  POM172678  Muhlenbergia asperifolia Franklin P. Nutting s.n. Lassen Eagle Lake. Comment
  RSA129322  Muhlenbergia asperifolia H. S. Yates 1936-8-11 6072 Lassen Baxter Creek 1280 Comment
  UC589858  Muhlenbergia asperifolia H. S. Yates 1936-8-11 6059 Lassen near Red Rock; Sierraville Quadrangle 1341 Comment
  RSA268993  Muhlenbergia filiformis J. R. Reeder, C. G. Reeder 1972-7-24 5811 Lassen Lassen National Forest; 17 miles NW of Susanville, along Hwy 44 1128 Comment
  CAS-BOT-BC275159  Muhlenbergia richardsonis Parkison 1916-6-10 19 Lassen Harvey Valley 1676 Comment
  NY492651  Myosurus apetalus var. montanus N. H. Holmgren 1978-6-11 8913 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance 1680 Comment
  CAS-BOT-BC83319  Myosurus minimus Peter H. Raven; Otto Thomas Solbrig 1958-6-17 13285 Lassen Along United States Highway 395, 1.9 miles south of Ravendale. Comment
  CHSC107321  Myosurus minimus Lowell Ahart; John Dittes 2011-6-21 17531 Lassen Bottom of a vernal pool, just west of the fence, about 300 yards southwest of the Parking Area west of the old barn, on the west side of Elkins Lane, Ash Creek State Wildlife Area, about 4.4 miles (air) west of Adin, about 7.2 miles (air) northeast of Bieber, Big Valley. 1268 Comment
  CHSC118856  Myosurus minimus L. P. Janeway; B. Castro 2015-6-5 11769 Lassen Great Basin, Modoc Plateau. Along County Road 512 16.9 road-km south from Surprise Valley Road towards Tuledad Canyon; ina small northwestern drainage into Post Canyon; 2.3 air-km east-southeast of Little Hat Mountain. 1837 Comment
  CHSC676  Myriophyllum sibiricum V. Holt 1946-7-12 Lassen Pine Creek Slough. 1584 Comment
  POM312396  Myriophyllum sibiricum S. Galen Smith, Malcolm A. Nobs 1949-7-20 1049 Lassen 4 miles west of Adin. Comment
  UCD102560  Myriophyllum sibiricum G. Schoolcraft 1996-9-11 2565 Lassen Willow Creek. 1310 Comment
  HSC13476  Myriophyllum verticillatum Fred J. Kindel 1955-7-8 Lassen Mt. Meadows Reservoir, Westwood Comment
  JEPS107305  Nama aretioides var. californica Lowell Ahart, John Dittes 2005-6-1 11886 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
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Jun 18 2007
  JEPS79141  Nama aretioides var. multiflora L. R. Heckard with R. Bacigalupi 1980-6-11 5243 Lassen 11.3 mi n Litchfield (along U.S. 395 s of Deep Creek crossing); s of Deep Creek crossing, n of Litchfield 1463 Comment
  UC133072  Nama aretioides var. multiflora Dr. Gustav Eisen 1891-1 Lassen Honey Lake Comment
  POM126780  Nama densa Franklin P. Nutting s.n. Lassen Eagle Lake. Comment
  UC1561920  Nama densa var. densa Barbara Ertter with Gary Schoolcraft 1987-6-16 7198 Lassen saddle on e side of Hot Springs Peak, Skeedaddle Mountains on the ne side of Honey Lake Hot Springs Peak; Skeedaddle Mountains, Honey Lake, Hot Springs 2194 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
  CDA40080  Navarretia breweri T. C. Fuller 1980-8-5 20306 Lassen 28 km NE of Ravendale; east shore of Dodge Reservoir, in campground area. Comment
  UCD32675  Navarretia breweri Beecher Crampton 1954-7-6 2080 Lassen Lassen County, 3 miles north of Madeline, along US highway 395. Comment
  CHSC29885  Navarretia capillaris Robin L. Ondricek 1978-7-5 89 Lassen At the edge of the trees on the ne side of Mahogany Lake. 2057 Comment
  CHSC44331  Navarretia divaricata Lowell Ahart; John Thomas Howell 1974-7-9 541 Lassen Along Eagle Lake Road, on the south-west side of Eagle Lake. 1584 Comment
  CHSC99105  Navarretia intertexta Lowell Ahart; John Dittes 2008-6-22 15028 Lassen Along a small natural drainage, about 120 yards west of the road levee, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  JEPS124382  Navarretia intertexta subsp. intertexta Lowell Ahart, John Dittes 2015-11-14 20303 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS121307  Navarretia intertexta subsp. propinqua Lowell Ahart 2013-7-22 18853 Lassen 10 yards S of a man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1008717  Navarretia intertexta subsp. propinqua Laura E. Mills 1940-7-8 Lassen about 2 mi s Susanville; Sierra Nevada Mountains 1524 Comment
  SJSU11522  Navarretia intertexta subsp. propinqua J. W. Tilden 1960-6-27 1519 Lassen by Moonlight Rd 5 mi E of Westwood 1524 Comment
  UCD48456  Navarretia intertexta subsp. propinqua G. L. Stebbins Jr. 1949-8-6 4001 Lassen Hog flat, NW of Susanville. 1676 Comment
  CHSC1253  Navarretia leptalea 1951-7-8 Lassen Pit River. 1524 Comment
  SJSU11520  Navarretia leucocephala subsp. bakeri J. W. Tilden 1958-6-27 1295 Lassen Madeline, Madeline Plains 1615 Comment
  SEINET3860229  Navarretia leucocephala subsp. leucocephala Leigh A. Johnson 2006-1 06 -147 Lassen Lassen Natl. Forest: south side of Champs Flat Road, east end of Champs flat, a little west of Dow Flat road.; 0 1693 Comment
  CHSC113072  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2013-7-22 18852 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117270  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2016-7-15 21213 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) notheast of Bieber, Big Valley. 1261 Comment
  CHSC66253  Navarretia leucocephala subsp. minima Vernon H. Oswald; Lowell Ahart 1996-6-24 7847 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. On the W side of the meadow just S of the cabins. 1633 Comment
  HSC63964  Navarretia leucocephala subsp. minima Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  JEPS120031  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2012-7-9 18288 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
  RSA0035408  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2008-6-20 14952 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
  UC1137571  Navarretia leucocephala subsp. minima A. Simontacchi 1940-6-7 893 Lassen 6.4 mi sse Beaver Spring; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1137761  Navarretia leucocephala subsp. minima August L. Hormay 1934-5-15 Lassen 2 mi n Eldridge's; Lassen Forest 1524 Comment
  UC909114  Navarretia linearifolia subsp. linearifolia G. L. Stebbins Jr. with P. Dansereau, C. McMillan, and K. Narayan 1949-8-7 4009 Lassen 5 mi se Black's Mtn Experimental Range; Grass Valley, Black's Mtn Experimental Range 1676 Comment
  SEINET10458443  Nemacladus rigidus Rupert C. Barneby 1943-6-15 Barneby 5765 Lassen Smoke Creek northeast of Viewland 1341 Comment
  CHSC117190  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 Valleuy Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  JEPS120810  Nemophila pedunculata Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18724 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
  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
  UC1609375  Nemophila pedunculata Vernon Oswald and Lowell Ahart 1993-5-12 5389 Lassen 1.6 mi se Pittsville Rd. (Hwy 44 between Poison Lake and A21 (to Westwood)); betw Poison Lake and A21 1719 Comment
  UC604678  Nemophila pedunculata Farris Farris 1935-5-20 Lassen five mi sw Susanville; sw of Susanville 1341 Comment
  UC606930  Nemophila pedunculata L. Constance 1938-6-10 2323 Lassen 2.6 mi sw Fredonyer Pass (McKenzie Meadows at Coppervale Ranger Station, Chester--Susanville Road); sw of Fredonyer Pass, McKenzie Meadows 1524 Comment
  POM73805B  Nemophila pedunculata Marcus E. Jones 1897-7-1 s.n. Lassen Susanville at Perkin s Ranch. 1524 Comment
  CHSC4447  Neoholmgrenia andina K. R. Stern 1967-6-24 2416 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 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
  CDA41136  Nicotiana attenuata T. C. Fuller 1959-7-7 4734 Lassen Highway 395, 2.4 miles south of road to Karlo. 0 Comment
  HSC42424  Nicotiana attenuata Barbara Kelly 1977-8-9 557 Lassen 20 mi. E Madeline on dirt road from Adin. 1 mi. E of 10 ton limit bridge over wash Comment
  HSC4506  Nitrophila occidentalis Fred J. Kindel 1955-7-14 Lassen Wendel Comment
  CDA18261  Nothocalais alpestris G. D. Barbe 1974-8-2 1923 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UC8805  Nuphar lutea subsp. polysepala J. Burtt Davy Jun 17 1897-Jun 24 1897 3336 Lassen Honey Lake Valley, deep pools of Susan River Susan River; Honey Lake Valley, Susan River Comment
  JEPS124827 Image available Oenothera cespitosa M. L. Wheelis 1964-6-30 125 Lassen 16 miles north of Hallelujah Junction, highway 395. Comment
  HSC22878  Oenothera deltoides John Pratt 1970-6-14 16 Lassen East of Janesville Comment
  UC1584022  Oenothera deltoides subsp. cognata G. Schoolcraft 1990-6-12 2086 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC1186579  Oenothera deltoides subsp. piperi G. I. Stage and R. W. Thorp 1959-6-19 59 -113 Lassen 7.2 mi se Milford Comment
  UC66124  Oenothera deltoides subsp. piperi P. B. Kennedy 1901-6-10 Lassen R.R. station Constantia Comment
  NY998639  Oenothera deltoides var. piperi W. W. Eggleston 1911-5-29 6745 Lassen Vicinity of Doyle Station 393 Comment
  UC157874  Olsynium douglasii var. douglasii Milo S. Baker 1890-1 Lassen Milford Comment
  CDA36782  Onopordum acanthium D. B. Joley 1976-6-16 21 Lassen Grasshopper Lake. 0 Comment
  JEPS88402  Oreostemma alpigenum var. andersonii Vernon H. Oswald and Lowell Ahart 1996-8-1 8121 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi n Dyer Mtn. Lookout (ssw of Westwood) 1737 Comment
  UC2027324  Oreostemma alpigenum var. andersonii Anthony Baniaga 2011-8-9 491 Lassen Lassen National Forest. About 1/2 mi W of Griffith Hill, S of 30N21. Swain Mountain quadrangle Comment
  UCD134723  Oreostemma alpigenum var. andersonii Ratliff 1966-7-15 9 Lassen Lassen Forest. Lower Pine Creek - PLDT 49. 1676 Comment
  UC1137776  Orobanche corymbosa subsp. corymbosa August L. Hormay 1934-7-2 Lassen Lassen National Forest, 1/4 mile NW of Black's Mountains, Headquarters. Comment
  CAS-BOT-BC500324  Orobanche uniflora subsp. occidentalis H. C. Cantelow 1941-5-22 s.n. Lassen Fredonyer Pass, 18.5 mi W of Susnville, Hwy 36 Comment
  CAS-BOT-BC238447  Orthocarpus Mike Vasey 1990-6-30 9054 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CHSC37345  Orthocarpus cuspidatus subsp. cryptanthus J. D. Prouty 1978-6-28 5 Lassen Lower Dry L., SE of Eagle L. 1645 Comment
  CHSC5910  Orthocarpus cuspidatus subsp. cryptanthus M. West 1946-6-20 Lassen Edge of Grasshopper Valley. 1630 Comment
  CHSC60858  Orthocarpus cuspidatus subsp. cryptanthus Vernon H. Oswald; Lowell Ahart 1993-6-28 5604 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  POM44258  Orthocarpus hispidus Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  RSA39737  Orthocarpus lacerus Philip A. Munz 1947-5-20 11890 Lassen Milford. 1265 Comment
  CHSC13864  Oxypolis occidentalis Mary Meyer 1973-7-7 20 Lassen Located at NE end of Murrer's Upper Meadow. 1572 Comment
  CHSC59070  Oxypolis occidentalis Vernon H. Oswald; Lowell Ahart 1992-8-25 5194 Lassen Lassen Volcanic National Park. Forested slope at the E corner of Snag Lake. 1853 Comment
  CHSC99145  Packera cana Lowell Ahart; John Dittes 2008-6-19 14877 Lassen Open flat, east bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC1561831  Packera cana Barbara Ertter with Gary Schoolcraft 1987-6-16 7194 Lassen Honey Lake Skeedaddle Mountains, Hot Springs Peak (ne side, saddle on e side of peak) 2194 Comment
  CHSC75465  Packera multilobata Vernon H. Oswald; Lowell Ahart 1999-6-9 9734 Lassen Hwy. 395 northeast of Susanville and north of Smoke Creek Ranch Rd. at Mud Flat. On the bank between the highway and the playa. 1348 Comment
  CAS-BOT-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
  CHSC21231  Paeonia brownii Robert A. Schlising 1974-7-19 3151 Lassen East side of Eagle Lake, just south of Eagle Lake Field Station; basaltic rocks from Black Mt. lava flow by Bly Tunnel. Comment
  JEPS94131  Pectocarya setosa Vernon H. Oswald and Lowell Ahart 1998-5-22 9098 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd., 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  JEPS79152  Pedicularis attollens L. R. Heckard with R. Bacigalupi 1980-6-12 5259 Lassen just ne of Westwood (near golf course) 1554 Comment
  SBBG7089  Pedicularis attollens H. and M. Dearing 1938-7-1 2238 Lassen 12 mi W of Susanville Comment
  UC447220  Pedicularis groenlandica Franklin P. Nutting Lassen Pine Creek Comment
  CHSC4924  Pedicularis semibarbata L. G. Bennett 1967-7-14 142 Lassen Immediate vicinity of Silver Lake. 1975 Comment
  HSC20946  Pedicularis semibarbata H. E. Parks, S. T. Parks Jun 1928 237 Lassen Drakesbad, Mt. Lassen, E side 1524 Comment
  SEINET3836472 Image available Pedicularis semibarbata Marcus E. Jones 1897-6-28 Lassen Diamond Mt. Susanville, Perkin's Ranch 1829 Comment
  SEINET10931175  Pedicularis semibarbata Katherine L. Morris 1973-5-25 Morris 236 Lassen Collected 7.6 mi nw of jct of hwy 36 & 44 on hwy 44, in an area of yellow pine And incense cedar, very moist area. Comment
  POM203062  Penstemon deustus subsp. heterander J. T. Howell 1934-7-9 12523 Lassen Pine Creek Flat Comment
  RSA401794A  Penstemon deustus subsp. sudans Francis W. Pennell 1940-6-9 25768 Lassen Route 36, hill west of Susanville. 1372 Comment
  RSA177476  Penstemon deustus subsp. sudans R. M. Straw 1962-6-29 2198 Lassen 10 miles W of Susanville on Cal 36. 1580 Comment
  SEINET5326727 Image available Penstemon deustus var. pedicellatus P. A. Lehenbauer 1937-5-30 s.n. Lassen 60 miles north of Reno, on Feather River, near Feather River Inn. Comment
  JEPS127712  Penstemon gairdneri Alejandro Brambila, Michael Dolan 2016-7-20 CA 320 -167 Lassen Railroad trail off 395 North of Tule Mountain. South end of loop. Population on Ridge to West. Comment
  CHSC25147  Penstemon gracilentus B. Anthony 1967-7-10 263 Lassen Deans Meadow, 6.8 mi from Eagle Lake Biological Station. 1920 Comment
  CHSC29258  Penstemon gracilentus J. D. Prouty 1978-6-28 11 Lassen E of Eagle L., at W shore of Lower Dy L. Comment
  CHSC57320  Penstemon gracilentus Mary Meyer 1980-7-21 Lassen 2072 Comment
  CHSC5912  Penstemon gracilentus R. Gein 1946-6-24 Lassen McCoy Flat. Eagle Lake. 1645 Comment
  UC1063167  Penstemon gracilentus H. P. Hagge 1935-9-12 27 Lassen Logan Mtn. Eagle Lake Quad., Logan Mtn. Comment
  SEINET10325483  Penstemon gracilentus K. A. Vincent 1986-7-19 4382 Lassen Sierra Nevada Roop Mtn.; common in burned area in pine-spruce forest along CA A1 at Eagle Lake Summit ca 7.6 mi N of j 1932 Comment
  UC1523811  Penstemon janishiae Gary Schoolcraft 1983-5-31 963 Lassen along Hwy 139 near Upper McBride Sp; near Upper McBride Sp. 1584 Comment
  CHSC66733  Penstemon neotericus Vernon H. Oswald; Lowell Ahart 1996-8-1 8118 Lassen Junction of Forest Rd. 28N56 (D-line) and the spure road to Indian Ole Dam on Mountain Meadows Reservoir, SW of Westwood. 1536 Comment
  JEPS11208  Penstemon neotericus Brown and Wieslander 1922-7-23 9 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  NY627255  Penstemon neotericus K. A. Vincent 1987-8-5 4499 Lassen Sierra Nevada, Roop Mountain; along CA A1, ca. 4 miles northwest of jct. CA 36, site ca. 6 air miles west-northwest of Susanville 1737.4 Comment
  NY627269  Penstemon neotericus C. B. Wolf 1937-8-7 9068 Lassen Northern Sierra Nevada, Red Bluff-Susanville Road, 11.5 miles east of Chester 1493.5 Comment
  CHSC5914  Penstemon newberryi J. B. Kimsey 1946-7-12 Lassen Gem Lake, Caribou Primitive Area. 2133 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
  CAS-BOT-BC239221  Penstemon newberryi var. berryi Clare B. Hardham 1969-8-28 17449 Lassen West of Janesville Comment
  CHSC36470  Penstemon roezlii Jeffrey R. Peek 1982-6-4 31 Lassen Ca. .5 mi e of Murrers Upper Meadow on road going to meadow. Comment
  CHSC37349  Penstemon roezlii Jennifer Estep 1978-6-27 19 Lassen Dry L., E of Eagle L. 1645 Comment
  CHSC59571  Penstemon roezlii Mary Meyer 1980-5-20 524 Lassen Along ridge above Secret Creek. 1432 Comment
  CHSC7753  Penstemon roezlii Beverly J. Wise 1969-5-15 109 Lassen 24.5 mi. East on Hwy 395 on the West side of Hwy. 1554 Comment
  POM203060  Penstemon roezlii J. T. Howell 1934-6-10 11877 Lassen 12 miles N of Susanville, on road to Horse Lake. Comment
  SBBG28920  Penstemon roezlii D. D. Keck 1954-7-23 954 Lassen 12 mi W of Susanville 1676 Comment
  UC1063511  Penstemon roezlii A. Simontacchi 1940-6-20 851 A Lassen 4.1 mi w Harvey Mountain Lookout; Lassen National Forest, Hall's Flat Quad. Comment
  UC585179  Penstemon roezlii E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1764 Lassen summit of ridge e Red Rock; e of Red Rock 1828 Comment
  UCD13169  Penstemon roezlii Janet Browder 1973-6-3 92 Lassen Lassen CO. Day Camp in Eagle Lake Recreation Area. Elevation 5000 feet. 1524 Comment
  HSC63732  Penstemon rydbergii var. oreocharis Teresa Prendusi 1980-7-1 Lassen Champs Flat, 6 mi. W of N end of Eagle Lake 1707 Comment
  JEPS114709  Penstemon rydbergii var. oreocharis Lowell Ahart, John Dittes 2008-6-20 14919 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
  JEPS12898  Penstemon rydbergii var. oreocharis G. S. Crew and C. S. Robinson 1927-7-1 49 Lassen Bogard R.S. pasture Lassen Forest <sw?>, Bogard R.S. pasture 1712 Comment
  POM252929  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-22 15182 Lassen Along Hwy 36, 1 mile east of Westwood. 1524 Comment
  RSA0115350  Penstemon rydbergii var. oreocharis Lowell A. Ahart, John Dittes 2008-6-20 14919 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
  SJSU7940  Penstemon rydbergii var. oreocharis R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline 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
  UC614472  Penstemon rydbergii var. oreocharis L. Constance 1938-6-10 2322 Lassen 1.5 mi ne Robber Creek (near Westwood); ne of Robber Creek, near Westwood 1219 Comment
  UCD39133  Penstemon rydbergii var. oreocharis Beecher Crampton 1964-6-26 7081 Lassen 32 miles n.w. Susanville east end of Harvey Valley. 1694 Comment
  CHSC12482  Penstemon speciosus Carol Weld 1969-6-20 14 Lassen Road to Dean's Meadow from Five Corners. 1889 Comment
  HSC63768  Penstemon speciosus Teresa Prendusi 1980-7-1 Lassen Champs Flat, 6 mi. W of N tip of Eagle Lake 1768 Comment
  JEPS11507  Penstemon speciosus Milo S. Baker 1890-1 Lassen Honey Lake Valley Comment
  NY661031  Penstemon speciosus J. T. Howell 1934-6-19 11882 Lassen 12 miles north of Susanville on road to Horse Lake Comment
  POM44291  Penstemon speciosus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  SBBG26836  Penstemon speciosus D. D. Keck 1930-7-23 47 Lassen Reno Junction 1219 Comment
  UC1520676  Penstemon speciosus Noel H. Holmgren and Patricia K. Holmgren 1980-7-5 9518 Lassen 19 km (12 mi) airline distance ese Ravendale (14.8 km (9.2 mi) e U.S. Highway 395 via Rye Patch Canyon, Upper Smoke Creek drainage); Upper Smoke Creek drainage 1680 Comment
  UC773855  Penstemon speciosus L. R. Short and J. Warren 1936-6-26 S- 357 Lassen Burgess Spr. Exp. Range Lassen Forest 1844 Comment
  RSA121811  Penstemon speciosus G. A. Fischer, Irwin H. Johnson 1933-7-12 F- 220 Lassen Lassen Forest. 1707 Comment
  SBBG54516  Penstemon speciosus F. W. Pennell 1940-7-23 26254 Lassen 2 mi N of jct with St Hwy 24, NE of Plumas Comment
  CAS-BOT-BC243406  Penstemon sudans G. Schoolcraft 1998-7-14 2761 Lassen NE of Shaffer Mtn. 1356 Comment
  CAS-BOT-BC243408  Penstemon sudans David D. Keck 1930-7-23 953 Lassen Four miles west of Susanville, Sierra Nevada 1463 Comment
  CHSC13647  Penstemon sudans M. S. Taylor 1974-7-13 310 Lassen Ca 15 ft w of Mohagany Lake, ca. 3 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 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
  JEPS84973  Penstemon sudans Barbara Ertter with Gary Schoolcraft 1987-6-16 7178 Lassen below ridge ca 1 mi w Hot Springs VABM (ne side Honey Lake); Skeedaddle Mountains, Honey Lake 1828 Comment
  JEPS9321  Penstemon sudans George W. Gillett 1953-7-13 274 Lassen Highway 36, one mi e Fredonyer Pass (Lassen National Forest); , e of Fredonyer Pass 1706 Comment
  NY661808  Penstemon sudans D. D. Keck 1935-6-25 3756 Lassen Susanville; just west of town Comment
  UC1036207  Penstemon sudans George W. Gillett 1953-7-13 274 Lassen Highway 36 one mi e Fredonyer Pass; Lassen National Forest, e of Fredonyer Pass 1706 Comment
  UC423673  Penstemon sudans David D. Keck 1930-7-23 948 Lassen Susanville Sierra Nevada, Susanville 1280 Comment
  RSA0029641  Penstemon sudans Anthony Baniaga, R. Bomberger 2011-7-28 478 Lassen Lassen National Forest. Highway 36, ca. 1/4 mile E of 'Fredonyer Pass Winter OHV Parking Lot.' 1950 Comment
  OBI75898  Penstemon venustus Anthony Baniaga and R. Bomberger, R. Bomberger 2011-7-28 479 Lassen Lassen Natl Forest. Along Hwy 36. Fredonyer Pass quad. T29N R10E sec 2 sW of NW 1701 Comment
  OBI82794  Penstemon venustus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3935 Lassen E of Freydonyer Pass. 6.2 rd mi west on Hwy 36 after jct with Hwy 44. S side of rd. Ca 11 air mi wsw of Susanville.; 0 1659 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
  CAS-BOT-BC211251  Perideridia Louella Bass 1976-1-1 158 Lassen Elysian Valley Comment
  CHSC91292  Perideridia bolanderi Lowell Ahart; John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  JEPS107969  Perideridia bolanderi Lowell Ahart, John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  UC1004694  Perideridia bolanderi subsp. bolanderi R. C. Bechtel 1954-7-12 Lassen Bridge Creek Camp Comment
  UC1123141  Perideridia bolanderi subsp. bolanderi A. Simontacchi 1940-6-11 846 Lassen 3.7 mi sse Black Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1137777  Perideridia bolanderi subsp. bolanderi George A. Fischer and Irwin H. Johnson 1933-7-12 F 210 Lassen Grass Valley Lassen National Forest 1722 Comment
  RSA723862  Perideridia bolanderi subsp. bolanderi David H. French 1968-6-3 2882 Lassen N of Honey Lake, W side of Highway 395, 7.4 miles NE of Litchfield Comment
  SEINET5320866  Perideridia bolanderi subsp. bolanderi Unknown 1968-6-3 2882 Lassen Northeast of Litchfield; North of Honey Lake, west side of Highway 395, 7.4 miles northeast of Litchfield. Near historical marker about emigrants and approximately 500 feet north of it Comment
  HSC73083  Perideridia gairdneri subsp. gairdneri Cindy Prouty 1978-7-11 19 Lassen Papoose Creek, S of Gallatin 1585 Comment
  CAS-BOT-BC423342  Peritoma platycarpa David Dreyer 1969-7-7 s.n. Lassen Dirt road 6 miles east of Viewland. 1371 Comment
  HSC63926  Peritoma platycarpa Teresa Prendusi 1980-5-29 1108 Lassen Willow Creek, 2 mi. NE of Susanville on mesa tops 1357 Comment
  CHSC71885  Persicaria lapathifolia Vernon H. Oswald 1998-9-8 9583 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.) 1258 Comment
  POM266184  Phacelia adenophora J. T. Howell 1934-6-10 11898 Lassen Horse Lake Comment
  RSA75519  Phacelia adenophora F. W. Peirson 1926-6-24 6851 Lassen On Madeline Plain. Comment
  SJSU14070  Phacelia adenophora W. Savage 1964-6-30 337 Lassen by Hwy 89, 11 mi N of Susanville Comment
  SJSU9143  Phacelia adenophora M. R. Kempf 1965-7-13 296 Lassen by Hwy 139, 14 mi N of Susanville 1524 Comment
  UC1537547  Phacelia adenophora Gordon H. True Jr. 1938-7-8 905 Lassen near Termo 1371 Comment
  POM72872  Phacelia adenophora C. C. Bruce 1898-06 2198 Lassen Madeline Plains. Comment
  UC107370  Phacelia bicolor var. bicolor T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  SEINET10935993  Phacelia hastata Mary Susan Taylor 1974-1 Taylor 274 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA716141  Phacelia hastata subsp. compacta L. Ahart, John Dittes 2005-6-2 11950 Lassen Along a poor dirt road, about one mile northeast of the Anderson Ranch home, Long Valley, about five and a half miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. 1499 Comment
  CHSC91193  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11952 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  UC107564  Phacelia heterophylla subsp. virgata T. S. Brandegee 1892-6-26 Lassen Milford Comment
  JEPS17612  Phacelia humilis Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5405 Lassen 4.4 mi s Patterson Ranger Station (s end of mts., e edge of meadow); Modoc Nat. Forest, Warner Mts., Long Valley Meadow 2057 Comment
  UC1537537  Phacelia humilis Gordon H. True Jr. 1938-7-9 907 Lassen near Horse Lake Comment
  RSA516986  Phacelia humilis var. humilis Barbara Ertter, Gary Schoolcraft 1987-6-16 7196 Lassen Skeedaddle Mountains on northeast side of Honey Lake; saddle on east side of Hot Springs Peak. 2195 Comment
  UC735052  Phacelia inundata Lincoln Constance 1946-7-3 3097 Lassen Spauldings Eagle Lake (w edge of lake) 1706 Comment
  UC764434  Phacelia inundata Verne Grant 1947-9-5 8374 Lassen nw shore of lake by Sam Webb's place (Spaldings); Eagle Lake Comment
  CHSC12417  Phacelia linearis Anne Linda Brisk 1969-6-25 20 Lassen Growing behind Shepherd's Hall at ELBS. 1554 Comment
  CHSC4813  Phacelia linearis R. Carter 1967-7-7 576 Lassen Collected outside dining hall, n side, 15 yds from building. 1524 Comment
  CHSC59551  Phacelia linearis Mary Meyer 1980-5-20 Lassen Common along ridges above Secret Creek. 1432 Comment
  CHSC93235  Phacelia linearis John Dittes; Scott Chamberlain 2004-6-28 1009 Lassen Modoc Plateau; Long Valley; ca. 1.8 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 1.0 air-mile east of Plumas County line. 1460 Comment
  JEPS94481  Phacelia linearis Vernon H. Oswald and Lowell Ahart 1997-5-27 8526 Lassen 4.9 mi ne of Highway 139 (Coyote Flat on Forest Route 38N04); Coyote Flat on Forest Route 38N04 1813 Comment
  RSA152684  Phacelia linearis I. L. Wiggins, Dorothy Wiggins 1961-6-11 16357 Lassen On hillside near northeast end of Eagle Lake. Comment
  RSA324239  Phacelia lutea Arnold Tiehm, Raymond Evans, James Young 1984-6-7 8593 Lassen Flats n the northwest side of Shaffer Mountain. 7.5 airmiles NNW of Litchfield. 1372 Comment
  CHSC111256  Phacelia mutabilis L. P. Janeway; B. Castro 2012-7-3 10939 Lassen Modoc Plateau. Near top of Shaffer Mountain, southeast-facing slope, steep and very rocky with lots of outcrops of hard dark volcanic rock. 2012 Comment
  JEPS4041  Phacelia mutabilis Frances D. Payne 1929-7-12 85 Lassen ridge above Lost Lake; Warner Mountains 2438 Comment
  JEPS17909  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 Engelmine and Indian Valley); Gold Run Cr. 1767 Comment
  NY1058138  Phacelia ramosissima var. eremophila N. H. Holmgren 1980-7-4 9508 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 Comment
  UC107342  Phacelia ramosissima var. eremophila T. S. Brandegee 1892-6-29 Lassen Janesville Comment
  CAS-BOT-BC141447  Phacelia ramosissima var. eremophila H. D. Ripley; R. C. Barneby 1943-6-13 5691 Lassen Milford 1264 Comment
  CAS-BOT-BC159229  Phacelia ramosissima var. subglabra John Thomas Howell 1934-6-30 11873 Lassen Janesville Comment
  JEPS25530  Phacelia thermalis Rimo Bacigalupi with Lincoln Constance 1959-6-16 7144 Lassen Hwy 395 1/4 mi s junction of road to Smoke Creek (playa beside hwy) 1341 Comment
  JEPS97248  Phacelia thermalis Vernon H. Oswald and Lowell Ahart 1995-6-19 6902 Lassen Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 8.4 mi E of Highway 395. Comment
  NY1057982  Phacelia thermalis H. D. D. Ripley 1943-6-15 5761 Lassen Smoke Creek, northeast of Viewland 1341 Comment
  SJSU14072  Phacelia thermalis W. Savage 1964-6-30 338 Lassen by Hwy 338, 11 mi N of Susanville Comment
  UC1776695  Phleum pratense G. Schoolcraft 1994-8-2 2407 Lassen About 1.5 miles SW of Boot Lake 2011 Comment
  JEPS118284  Phlox douglasii Lowell Ahart, John Dittes 2011-6-20 17506 Lassen About 40 yards north of the dirt road, about 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  UC1137642  Phlox douglasii subsp. rigida A. Simontacchi 1940-5-13 701 Lassen 4.1 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1981 Comment
  UC1537492  Phlox douglasii subsp. rigida Gordon H. True Jr. 1936-6-27 560 Lassen Top of Hot Spring Mountain Hot Spring Mountain 1828 Comment
  JEPS71121  Phlox gracilis Dr. R. H. Loughridge 1912-1 Lassen Madeline Plains Comment
  UC1124221  Phlox gracilis A. Simontacchi 1940-5-10 690 Lassen 7.3 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1752 Comment
  RSA304681  Phlox hoodii var. canescens Jim Shevock 1971-4-9 944 Lassen Hwy 299, E of Dana. 1067 Comment
  UC579783  Phlox longifolia subsp. compacta David D. Keck and J. Clausen 1935-6-24 3744 Lassen 2 mi s Ravendale Comment
  UC1924579  Phlox speciosa Debra Valov 2006-5-29 2006031 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1282 Comment
  JEPS107867  Phlox speciosa subsp. occidentalis Lowell Ahart, John Dittes 2005-6-2 11928 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
  UC52648  Phlox speciosa subsp. occidentalis M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixie Mts. Comment
  CHSC7764  Phlox stansburyi Beverley J. Wise 1969-4-10 93 Lassen 2.5 mi. south of Susanville on Las. Co. Rd. 204. 1310 Comment
  RSA271915  Phlox stansburyi Christopher Davidson 1975-6-7 2750 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  CHSC7709  Phoenicaulis cheiranthoides Beverley J. Wise 1969-3-4 34 Lassen 1.5 mi. north of Susanville on Hwy 139. 50 feet w of rd. 1341 Comment
  JEPS94479  Phoenicaulis cheiranthoides Vernon H. Oswald and Lowell Ahart 1997-5-27 8490 Lassen 38.2 mi n of Susanville (e side of Highway 139 at a small farm pond, 7.4 mi n of Eagle Lake Road, at a pullout along the highway); Highway 139 1627 Comment
  UC1609187  Phoenicaulis cheiranthoides Vernon H. Oswald and Lowell Ahart 1993-5-12 5386 Lassen 1.6 mi se of Pittsville Road (Hwy 44 between Poison Lake and A21 (to Westwood) on n side of road) 1719 Comment
  CDA19731  Phyllodoce breweri J. Chattin August 1947 s.n. Lassen Northern California; Silver Lake. 0 Comment
  UC21954  Phyllodoce breweri M. S. Baker and Frank Nutting 1894-7-20 Lassen Silver Lake Comment
  SEINET11610645  Pinus lambertiana David Charlet 1996-7-8 2291 Lassen Diamond Mts; Sierra Nevada Janesville Grade, Great Basin drainage (Honey Lake) 1859 Comment
  CAS-BOT-BC80047  Pinus washoensis John Thomas Howell 1969-8-7 45886 Lassen Between Butte Lake and Cinder Cone Comment
  SEINET3874938  Pinus washoensis David A. Charlet 1994-7-6 1924 Lassen Madelin Mesa foothills above Madeline plains.; 0 1689 Comment
  UC526162  Plagiobothrys cognatus John Thomas Howell 1934-6-10 11890 Lassen 15 mi. n. Susanville (on rd. to Horse Lake) Comment
  CHSC117271  Plagiobothrys cusickii Lowell Ahart; John Dittes 2016-7-15 21212 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1261 Comment
  JEPS107810  Plagiobothrys cusickii Lowell Ahart, John Dittes 2005-6-2 11954 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  JEPS117204  Plagiobothrys cusickii Lowell Ahart, John Dittes 2010-7-31 17014 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1510 Comment
  JEPS120895  Plagiobothrys cusickii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18772 Lassen About 300-400 yards NW of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS121292  Plagiobothrys cusickii Lowell Ahart, John Dittes 2013-7-22 18870 Lassen 10 yards S of the man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC29970  Plagiobothrys hispidulus R. A. Schlising 1979-6-7 3452 Lassen S end of Eagle Lake, at Papoose Creek and Meadow in Lassen National Forest. In streambed. 1584 Comment
  CAS-BOT-BC224969  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  SJSU8065  Plagiobothrys hispidus J. W. Tilden 1960-6-27 1495 Lassen Westwood 1524 Comment
  UC1037242  Plagiobothrys hispidus Leo Whitney 1933-8-20 1995 Lassen Hall's Flat ca 25 mi w of upper end Eagle Lake (Lassen National Forest); Hall's Flat, Lassen National Forest 1737 Comment
  UC1483821  Plagiobothrys kingii G. Schoolcraft 1980-5-8 227 Lassen s. Herlong 1255 Comment
  CHSC93687  Plagiobothrys kingii var. harknessii Lowell Ahart; John Dittes 2005-6-1 11891 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1433 Comment
  SBBG6336  Plagiobothrys mollis H. and M. Dearing 1939-6-6 3567 Lassen marsh on Pitt River, Bieber Comment
  SEINET10972885  Plagiobothrys scouleri var. hispidulus Katherine L. Morris 1973-5-25 Morris 248 Lassen 27.7 mi NW of the junction of Hwy 36 & 44 on Hwy 44, at Robber's Spring, in an open meadow on one side of the hwy with yellow pine, white fir and open on the other side. Comment
  JEPS107448  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
  CHSC12416  Platanthera Anne Linda Brisk 1969-6-26 23 Lassen 7.2 mi SW of ELBS. 1584 Comment
  HSC95284  Platanthera dilatata var. leucostachys Gordon Leppig 1998-7-12 941 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC16618  Platanthera dilatata var. leucostachys Jim Vaughn 1956-7-13 Lassen Drakesbad, Mt. Lassen Natl. Park 1738 Comment
  SJSU9125  Platanthera dilatata var. leucostachys H. L. Buckalew 1961-7-2 Lassen Blue Lake near Blue Lake Road Comment
  UC845587  Platanthera leucostachys A. A. Heller 1938-7-28 15298 Lassen about 1 mi e Westwood 1524 Comment
  POM253046  Platanthera leucostachys A. A. Heller 1938-7-28 15298 Lassen About a mile east of Westwood 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
  CAS-BOT-BC326710  Pleiacanthus spinosus John Thomas Howell 1961-9-25 36971 Lassen East side of Beckwourth Pass, Sierra Nevada 1554 Comment
  CAS-BOT-BC326713  Pleiacanthus spinosus Gordon H. True 1973-8-22 7658 Lassen North shore of Honey Lake ca. 5 miles east of Janesville and just west of Hartson Reservoir Comment
  CHSC36850  Pleiacanthus spinosus M. S. Taylor 1982-8-19 5020 Lassen Along old RR grade, s of and paralleling Hwy 70, just se of Beckwourth Pass on Plumas-Lassen county line. 1584 Comment
  UC768477  Pleiacanthus spinosus Robert F. Hoover 1940-9-28 4630 Lassen Susanville Comment
  UCD143647  Poa George A. Fischer; Irwin H. Johnson 1933-7-14 F 245 Lassen Lassen Nat'l Forest; Patterson Flat. 1737 Comment
  UC699671  Poa X fibrata Gus Hormay 1944-7-2 Lassen Squaw Valley Comment
  CAS-BOT-BC254944  Poa bulbosa John Thomas Howell 1975-7-23 51395 Lassen Susanville 1295 Comment
  HSC10643  Poa bulbosa D. E. Anderson 1969-7-5 5000 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  UCD90701  Poa bulbosa F. H. Taylor 1932-5-1 s.n. Lassen India Valley. Comment
  SEINET10868155  Poa bulbosa David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17757 Lassen Approx. 12 mi S of Adin on Calif. Hwy 139, in basalt & clay; along edge of road on rolling knol, in Artemisia-Juniper assoc. 1372 Comment
  CAS-BOT-BC255034  Poa compressa John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49506 Lassen Elysian Valley, W of Janesville 1325 Comment
  RSA300130  Poa compressa J. T. Howell 1974-7-10 50553 Lassen Elysian Valley; Sierra Nevada 1326 Comment
  UCD90918  Poa cusickii Leo Whitney 1935-6-10 3214 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  JEPS107983  Poa cusickii subsp. cusickii Lowell Ahart, John Dittes 2005-6-2 11927 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
  JEPS70635  Poa cusickii subsp. cusickii G. S. Crew and C. S. Robinson 1927-7-15 61 Lassen sw Lassen Co. Clover Valley; Lassen Forest 1767 Comment
  UC1024815  Poa cusickii subsp. cusickii Leo Whitney 1935-6-19 3264 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest 1722 Comment
  UC1024837  Poa cusickii subsp. cusickii Leo Whitney 1935-6-10 3219 Lassen Camp 10 Fruit Grower's Supply Company 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
  HSC95195  Poa leptocoma subsp. leptocoma Gordon Leppig, J. Cromwell 1997-7-27 629 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  HSC95280  Poa leptocoma subsp. leptocoma Gordon Leppig 1998-7-12 944 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC246864  Poa nervosa John Thomas Howell 1934-6-14 12170 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  POM203054  Poa secunda J. T. Howell 1934-7-6 12459 Lassen Harvey Valley Comment
  POM267991  Poa secunda D. D. Keck 1944-7-8 5449 Lassen 1.5 mi W. of Susanville, on rim of plateau overlooking Susan River canyon 1341 Comment
  SEINET10522723  Poa secunda Jeffrey Huber 1971-6-2 Huber 106 Lassen 4 mi S of Adin along CA Hwy 139 in basalt-clay; valley floor in Artemesia. 1341 Comment
  UC1024690  Poa secunda subsp. juncifolia Leo Whitney 1933-7-15 2155 Lassen ca 16 mi w of upper end Eagle Lake (Harvey Mt); Lassen Nat'l Forest 1981 Comment
  UC1037123  Poa secunda subsp. juncifolia Leo Whitney 1935-6-23 3285 Lassen near Camp 10 Fruit Grower's Supply Company Comment
  UC718011  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5447 Lassen 2 mi w Westwood (meadow leading to Mountain Meadows Reservoir); Sierra Nevada 1524 Comment
  UCD92164  Poa secunda subsp. juncifolia J. E. Coke 1932-12-1 s.n. Lassen Lassen County. Comment
  UCD92381  Poa secunda subsp. juncifolia P. B. Kennedy 1901-6-10 s.n. Lassen Constantia. Comment
  HSC79825  Poa secunda subsp. secunda William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UC1024836  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3220 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024874  Poa secunda subsp. secunda Leo Whitney 1935-5-26 3151 Lassen 10 mi e Adin (Ash Creek) Comment
  UC1136989  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 219 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen Nat'l Forest 1722 Comment
  UC1024806  Poa wheeleri Leo Whitney 1935-6-23 3287 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024807  Poa wheeleri Leo Whitney 1935-6-23 3286 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1136985  Poa wheeleri L. R. Short 1936-4-28 S- 340 Lassen Burgess Spring Experimental Range; Lassen Forest 1767 Comment
  CAS-BOT-BC254381  Poaceae John Thomas Howell 1974-7-10 50518 Lassen Janesville, at the cemetary 1295 Comment
  CAS-BOT-BC244269  Podagrostis humilis George W. Gillett 1957-7-28 925 a Lassen Lassen Volcanic National Park. Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake, 100 yards above trail junction 1859 Comment
  JEPS112858  Polemonium micranthum Dean Wm. Taylor, Glenn L. Clifton 1992-5-7 12548 B Lassen Eagle Lake Region, Pine Creek, on Forest Road 33N07 ca. 0.8 mile S of Byrgess Flat, 1767 Comment
  JEPS120846  Polemonium micranthum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18743 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
  UC1483864  Polemonium micranthum M. Meyer 1980-5-1 Lassen e Horse Lake Road (s of Ravendale); , e of Horse Lake Road 1645 Comment
  UC73604  Polemonium occidentale Milo S. Baker 1894-1 Lassen Bridge Creek Comment
  UC188175  Polyctenium fremontii J. G. Lemmon Lassen Eagle Lake and Madeline Plains Comment
  SEINET10838602  Polyctenium fremontii Arnold J. Tiehm 1988-6-2 Tiehm 11703 Lassen 6.6 mi. N. Of the wendel rd on hwy 395 from susanville to alturas, mud flats along the hwy, t30n, r15e, sec 15. Plants growing with artemesia ant the edge of silty flats which were inundated earlier in the year. Petals white to pink. Comment
  SEINET3197107 Image available Polyctenium fremontii var. confertum Gary Schoolcraft 1984-7-9 1287 Lassen South of Fillman Road, 3.8 miles west of Hwy 395 1610 Comment
  CHSC64797  Polygala subspinosa Vernon H. Oswald 1995-5-31 6815 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 2.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  NY1002472  Polygala subspinosa H. D. D. Ripley 1943-6-15 5760 Lassen East of Viewland 1311 Comment
  UC507010  Polygonum George A. Fischer, Irwin H. Johnson 1933-7-12 F 192 Lassen Lassen National Forest, (Dry Lake), Grass Valley Dry Lake; Lassen National Forest, , Grass Valley 1694 Comment
  UC1536797  Polygonum amphibium var. emersum Gordon H. True Jr. 1939-7-6 1038 Lassen George Bailey Ranch Honey Lake Valley Comment
  NY652201  Polygonum amphibium var. stipulaceum G. Schoolcraft 1996-9-12 2571 Lassen In Willow Creek north of Susanville 1493.5 Comment
  CHSC117541  Polygonum aviculare Lowell Ahart; John Dittes 2016-7-13 21133 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS83272  Polygonum aviculare J. D. Jokerst 1983-7-24 1877 Lassen nw Ravendale; Madeline Plains 1615 Comment
  CHSC110777  Polygonum aviculare subsp. buxiforme Dean Wm. Taylor 2012-7-18 21280 Lassen Cascade Ranges. Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 miles S of Adin). 1706 Comment
  POM104627  Polygonum bistortoides Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC849110  Polygonum bistortoides A. A. Heller 1938-6-23 15141 Lassen 2 mi e Westwood Comment
  UC570303  Polygonum douglasii subsp. douglasii E. Sawyer 1935-6-27 215 Lassen Long Valley Sierraville Quadrangle 1310 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
  JEPS117589  Polygonum douglasii subsp. spergulariiforme 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1521 Comment
  UC1143031  Polygonum douglasii subsp. spergulariiforme L. R. Short 1936-9-30 S- 501 Lassen Burgess Spring Experimental Range Lassen National Forest 1767 Comment
  CAS-BOT-BC418534  Polygonum minimum George W. Gillett 1957-7-28 931 Lassen Lassen Volcanic National Park. One mile above Butte Lake, on Widow Lake Trail 1905 Comment
  UC1603210  Polygonum polygaloides J. Guardino 1993-6-8 256 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  UC1603212  Polygonum polygaloides J. Guardino 1993-5-22 171 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CHSC113013  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes 2013-7-23 18905 Lassen On the northwest side of a man made pond, about 160 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  HSC69611  Polygonum polygaloides subsp. confertiflorum Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  JEPS114745  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
  UC1520661  Polygonum polygaloides subsp. confertiflorum Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9466 Lassen along US 395 5.6 km (3.5 mi) s Madeline; Madeline Plains 1620 Comment
  CHSC27120  Polygonum polygaloides subsp. kelloggii Robert A. Schlising 1978-6-29 3297 Lassen E of Eagle Lake; dry creek bed just N of Murrers Meadow and Spring. In area of Pinus jeffreyi forest. 1536 Comment
  UC1136922  Polygonum sawatchense subsp. sawatchense George A. Fischer and Irwin H. Johnson 1938-7-14 F 248 Lassen Lassen National Forest 1767 Comment
  CAS-BOT-BC420157  Polygonum sawatchense subsp. sawatchense Clarence R. Quick 1961-6-21 61 -18 Lassen Adjacent to Road 21, Blacks Mountain Expermental [Experimental] Forest, northeast of Lassen Peak 1798 Comment
  UC465764  Polygonum shastense Franklin P. Nutting Lassen Silver Lake Comment
  HSC82252  Polygonum spergulariiforme Thomas W. Nelson, Jane P. Nelson 1980-7-6 6009 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  CAS-BOT-BC420975  Polygonum spergulariiforme Ernest C. Twisselmann 1961-9-21 6570 Lassen Harvey Valley Road, ca. 14 miles south of Pitville [Pittville] 1219 Comment
  CAS-BOT-BC232547  Polypogon monspeliensis Louella Bass 1982-6-20 s.n. Lassen 0.5 mile W of Karlo Comment
  SEINET10661618  Polypogon monspeliensis Lowell Ahart, John Dittes 2005-6-2 Ahart 11967 Lassen T23N, R17E, southwest 1/4 Section 10. Long Valley, about 4 1.2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  UC50635  Polypogon monspeliensis J. Burtt Davy Jun 17 1897-Jun 24 1897 3351 Lassen Honey Lake Valley Comment
  CHSC12480  Populus tremuloides Carol Weld 1969-6-25 21 Lassen Murrer's Meadow. 1524 Comment
  CHSC113811  Porterella carnosula Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18727 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS114988  Porterella carnosula Lowell Ahart, John Dittes 2008-6-20 14963 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
  JEPS28708  Porterella carnosula George W. Gillett 1957-7-29 938 Lassen near w end Widow Lake (Widow Lake, Lassen Volcanic National Park); Lassen Volcanic National Park, Widow Lake 2072 Comment
  SEINET10460825  Porterella carnosula Secrest 1951-6-23 SECREST s.n. Lassen Comment
  SEINET12326931  Porterella carnosula Unknown 1978-1 15 Lassen E shore Mahogany L., S of Eagle L., T31N;R11E, sec. 21 2060 Comment
  RSA772320  Potamogeton Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47202 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CHSC65368  Potamogeton amplifolius Vernon H. Oswald; Beth Corbin, Mike Dolan 1995-8-26 7218 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. Along the W shore of the lake. 1859 Comment
  UC1099904  Potamogeton amplifolius Verne Grant, Irving Schneider 1947-8-24 8269 Lassen nw shore of Blue Lake (northern Lassen County) Comment
  CAS-BOT-BC452094  Potamogeton amplifolius Verne Grant; Irving Schneider 1947-8-24 8269 Lassen Northwest shore of Blue Lake, Northern Lassen County. Comment
  CHSC100538  Potamogeton foliosus Daniel B. Marcum 2007-7-25 Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  UCD138278  Potamogeton illinoensis G. Schoolcraft 1996-9-11 2562 Lassen Willow Creek below petroglyphs and above dam. 1432 Comment
  UCD170231  Potamogeton natans K. M. Meyer; A. Townesmith 2007-7-21 146 Lassen Lassen National Forest. 1.3 mile on Road 10 to Silver Lake off Road 110. 1963 Comment
  JEPS103226  Potamogeton nodosus G. Schoolcraft 1996-9-11 2563 Lassen Willow Creek below petroglyphs above dam 1341 Comment
  UC1099819  Potamogeton pectinatus Malcolm A. Nobs, S. Galen Smith 1949-8-20 1491 Lassen 1 mi s Doyle; Long Creek Comment
  UC1100076  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-7-31 8201 Lassen sw of Madeline (George Williams' Ranch); Madeline Plan Comment
  UC1100077  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-7-30 8196 Lassen w end of Tule Lake Comment
  CAS-BOT-BC453913  Potamogeton pectinatus Arnold Tiehm; Gary Schoolcraft 1984-8-14 9246 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line 1698 Comment
  RSA323730  Potamogeton pusillus A. Tiehm, Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1699 Comment
  UC1713222  Potamogeton pusillus subsp. pusillus Herbert L. Mason and Verne Grant 1947-7-9 13292 Lassen 5 miles east of Bieber Comment
  RSA772322  Potamogeton richardsonii Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47200 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  UC1598197  Potentilla basaltica G. L. Clifton 1988-7-20 18126 Lassen near Ash Valley; Likely Quad., near Ash Valley 1541 Comment
  POM312882  Potentilla biennis Verne Grant 1947-7-30 8189 Lassen South point of west embayment, Tule Lake. Comment
  UC1776675  Potentilla breweri G. Schoolcraft 1994-8-1 2390 Lassen About 2 miles W of Boot Lake 2456 Comment
  RSA123323  Potentilla glandulosa L. R. Short 1936-6-10 s- 425 Lassen [Unspecified] 1854 Comment
  CHSC89722  Potentilla glandulosa subsp. glandulosa L. P. Janeway 2004-6-26 8154 Lassen High Cascade Range. About 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  CHSC13850  Potentilla gracilis var. fastigiata F. T. Griggs 1973-7-7 106 Lassen Lassen county Cone Spring. Comment
  CHSC4985  Potentilla gracilis var. fastigiata R. Clicquennoi 1967-6-24 12 Lassen NW corner of Eagle Lake on highway 139. 1524 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
  UC1137589  Potentilla gracilis var. fastigiata A. Simontacchi 1940-7-8 939 Lassen 3.9 mi se Blacks Mtn; Lassen National Forest, Halls Flat Quad. Comment
  HSC18787  Potentilla gracilis var. fastigiata Jim Vaughn 1956-8-25 Lassen Drakesbad, Mt. Lassen National Park 1738 Comment
  CAS-BOT-BC158476  Potentilla gracilis var. gracilis A. M. Vollmer; L. Beane 1953-7-1 81 Lassen Along Halls Flat road beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC89732  Potentilla millefolia L. P. Janeway 2004-6-26 8160 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  OBI77047  Potentilla millefolia Anthony Baniaga 2011-6-1 296 Lassen Lassen NF. Bogard Work Station helicopter landing ara, W of RR tracks, N of rd to Crater lake. Pine Crk Valley quad T32N R8e sec 33 NE of SW 1737 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
  SD149134  Prunella vulgaris var. lanceolata John Thomas Howell, Gardon H. True and Margaret Williams 1973-6-28 49443 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CAS-BOT-BC159781  Prunus andersonii Margaret Williams 1974-8-4 74 -L-75 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC106677  Prunus andersonii Zachary Garcia 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  HSC101096  Prunus andersonii C. Dow, D. Garrison 2008-5-3 Lassen OHV Trailhead and Trail to Indian Springs 1439 Comment
  SJSU13984  Prunus andersonii N. A. Hopkins 1988-5-16 1400 Lassen Scott Rd by Long Valley Cr c. 3 mi N of Hwy 70 1432 Comment
  SJSU14477  Prunus andersonii W. D. Pitts 1990-5-29 297 Lassen by Hwy 395, 5 mi N of Doyle 1310 Comment
  CDA34466  Prunus andersonii B. Villegas 2011-3-26 s.n. Lassen Hallelujah Junction. NE corner of HWY 395 & HWY 70 intersection. 0 Comment
  SEINET10542398  Prunus andersonii Paul Gallian, David B. Dunn 1971-6-2 Gallian 461 Lassen 6 miles n of hallelujah junction on us hwy 395, in artemisa tridentata, pinyon Pine, jeffrey pine along high ridge and in sandy wash 1402 Comment
  SJSU8180  Prunus andersonii M. D. Fleschner 1965-7-12 Lassen 2 mi SE of Milford near Honey L 1249 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
  CAS-BOT-BC361666  Pseudognaphalium thermale John Thomas Howell; Gordon H. True 1973-7-31 50022 Lassen On road from Janesville to Thompson Peak, Diamond Range 1737 Comment
  UCD91491  Pseudoroegneria spicata A. A. Beetle 1944-8-16 3018 Lassen On east side of Horse Lake. Comment
  CHSC36103  Pseudoroegneria spicata subsp. spicata Terence Finn 1979-6-18 8 Lassen .75 mi from Hallelujah Junction, going towards well on old road. 1524 Comment
  CHSC67079  Pseudostellaria jamesiana Jeanne Boze 1981-6-13 116 Lassen On northeast slope of Galletin Peak. 1981 Comment
  RSA0011562  Psilocarphus R. F. Thorne, Larry E. DeBuhr 1975-8-22 46990 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CAS-BOT-BC361755  Psilocarphus brevissimus var. brevissimus James Jokerst 1983-7-25 1892 Lassen Near Madeline Plains 1614 Comment
  CHSC60878  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald; Lowell Ahart 1993-7-8 5671 Lassen Halls Flat Rd. (33N18), 1.4 mi SSW of Pittville Rd. (Lassen 111, 36N01), ca. 5.4 mi (air) NW of Poison Lake. On the W side of the road. 1694 Comment
  JEPS109637  Psilocarphus brevissimus var. brevissimus Dean W. Taylor 2002-6-21 18174 Lassen Highway 139 ca. 10 miles N of Susanville, ca. 1 mile south of the southerly end of Willow Creek Valley 1524 Comment
  JEPS119651  Psilocarphus brevissimus var. brevissimus Lowell Ahart, John Dittes 2012-7-9 18290 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS114630  Psilocarphus tenellus var. tenellus Lowell Ahart, John Dittes 2008-6-22 15029 Lassen About 120 yards west of the road levee, on the bottom of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber 1262 Comment
  CAS-BOT-BC72538  Pteridium aquilinum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49175 Lassen Elysian Valley northwest of Janesville 1325 Comment
  HSC89839  Pteridium aquilinum var. pubescens Gary Schoolcraft 1980-8-13 353 Lassen N side of Diamond Mtn. on timber sale site 189 Comment
  UC725376  Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen about 2 miles east of Westwood 1524 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
  UCD91859  Puccinellia distans Malcolm A. Nobs; S. Galen Smith 1949-7-22 1070 Lassen NE shore of Eagle Lake. Comment
  CDA32666  Puccinellia lemmonii Gary Schoolcraft 2000-6-19 2906 Lassen Flat southeast of Ravendale BLM Fire Station. 0 Comment
  CAS-BOT-BC147815  Purshia tridentata var. tridentata D. B. Dunn; B. J. Cox 1971-6-2 17784 Lassen 6 mi. N. of Hallelujah Jct. on U.S. Hwy 395 1402 Comment
  CAS-BOT-BC147824  Purshia tridentata var. tridentata M. S. Taylor 1982-5-7 4431 Lassen Reno Junction on Hwy 70, just e of Beckwourth Pass 1524 Comment
  CAS-BOT-BC147867  Purshia tridentata var. tridentata George W. Gillett 1957-9-4 1129 Lassen Near outlet of Widow Lake, ca. 50 yards from lake 2057 Comment
  JEPS28802  Purshia tridentata var. tridentata George W. Gillett 1957-9-4 1129 Lassen ca 50 yds from Widow Lake (near outlet, near trail); Lassen Volcanic National Park 2057 Comment
  JEPS44640  Purshia tridentata var. tridentata Frank W. Peirson 1932-7-20 10355 Lassen 20 mi se Susanville Comment
  JEPS28661  Pyrola asarifolia George W. Gillett 1957-7-22 880 Lassen Snag Lake, South shore near Campsite 1850 Comment
  CAS-BOT-BC462880  Pyrola asarifolia Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville, Perkin's Ranch 2133 Comment
  CHSC66723  Pyrola picta Vernon H. Oswald; Lowell Ahart 1996-8-1 8130 Lassen Forest Rd. 28N56 (D-Line) ca. 0.6 mi NNW of Dyer Mtn. Lookout, SSW of Westwood. 2011 Comment
  RSA46867  Pyrola picta subsp. dentata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CAS-BOT-BC362265  Pyrrocoma carthamoides var. cusickii John Thomas Howell 1934-7-6 12453 Lassen Harvey Valley Comment
  HSC81545  Pyrrocoma carthamoides var. cusickii Thomas W. Nelson, Jane P. Nelson 1980-7-6 6049 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  UC1037291  Pyrrocoma hirta var. lanulosa Leo Whitney 1934-7-10 1671 Lassen ca 14 mi w Eagle Lake (dry meadow near Harvey Valley Spring); Lassen National forest, Harvey Valley 1737 Comment
  UC1136850  Pyrrocoma hirta var. lanulosa George A. Fischer and Irwin H. Johnson 1933-7-14 F. 242 Lassen Patterson R.S. Lassen National Forest, Patterson R.S. 1737 Comment
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Feb 24 2013
  CHSC52666  Pyrrocoma lanceolata var. lanceolata James Jokerst 1983-7-24 1881 Lassen Near Madeline Plains. 1614 Comment
  RSA715949  Pyrrocoma lucida L. P. Janeway 2005-7-31 8512 Lassen Northern High Sierra Nevada. Diamond Mountains; Head of large flat dry meadow at head of Bird Creek; 0.8 km northeast of Meadow View Peak. 1960 Comment
  RSA88088  Pyrrocoma racemosa var. paniculata J. T. Howell 1951-8-20 28227 Lassen Honey Lake Valley near Herlong 1280 Comment
  UC1192231  Pyrrocoma racemosa var. paniculata Verne Grant and Irving Schneider 1947-9-6 8392 Lassen near Wendel (w of Fleming Rach Headquarters) Comment
  RSA715982  Quercus kelloggii L. Ahart, John Dittes 2005-6-2 11942 Lassen 1.5 miles NE of the Anderson Ranch home, Long Valley, 6 miles (air) N of intersection of Scott Road and Hwy 70, 7.5 miles (air) NW of Hallelujah Jct. 1602 Comment
  JEPS93978  Ranunculus alismifolius var. alismifolius Vernon H. Oswald 1998-6-22 9230 Lassen ca. 18 mi. n. Westwood (Champs Flat Rd. (A-21) 1.8 mi. n. of Hwy. 44) 1749 Comment
  CAS-BOT-BC334481  Ranunculus aquatilis var. capillaceus R. F. Thorne; Larry E. DeBuhr 1975-8-22 46981 Lassen Along Hwy 395 ca 6 miles N of Madeline and 4.5 miles S of Modoc county line. 1616 Comment
  CHSC23755  Ranunculus aquatilis var. capillaceus M. S. Taylor 1974-7-10 282 Lassen In creek in meadow, ca. 1/2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 12 mi nw of Susanville. 1524 Comment
  CHSC65319  Ranunculus aquatilis var. diffusus Vernon H. Oswald; Lowell Ahart 1995-8-14 7185 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. In roadside pond. 1645 Comment
  CAS-BOT-BC379022  Ranunculus aquatilis var. diffusus Peter H. Raven; Otto T. Solbrig 1958-6-17 13256 Lassen in a pond along United States Highway 395, 7.1 mi west of Standish Comment
  NY494380  Ranunculus cymbalaria M. A. Nobs 1949-8-20 1484 Lassen Marshy banks of Long Creek, 1 mile north of Doyle, Honey Lake Valley Comment
  JEPS97783  Ranunculus cymbalaria var. saximontanus Annetta M. Carter 1945-9-30 1723 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  RSA293370  Ranunculus cymbalaria var. saximontanus Reino Alava 1957-7-5 1135 Lassen Along Highway no. 395, 4.4 miles S of Ravendale. Comment
  UC1025100  Ranunculus flammula Leo Whitney 1934-8-5 1800 Lassen 16 mi nw Westwood; Lassen National Forest, Caribou Lake 2194 Comment
  UC1191440  Ranunculus flammula Verne Grant and Irving Schneider 1947-8-24 8267 Lassen Blue Lake; nw shore, n Lassen Co. Comment
  HSC69071  Ranunculus glaberrimus Gary Schoolcraft 1979-4-3 4 Lassen N of Skedaddle Ranch along main rd. 1555 Comment
  UC69597  Ranunculus occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3379 Lassen Honey Lake Valley Comment
  POM204150  Ranunculus occidentalis var. ultramontanus J. T. Howell 1934-6-10 11878 Lassen 12 miles N of Susanville, on road to Horse Lake. Comment
  RSA74352  Ranunculus occidentalis var. ultramontanus Milo S. Baker 1952-5-23 12409 Lassen Along Hwy 36, betw Pluster and Fredownyer Pass. Comment
  POM312416  Ranunculus sceleratus Malcolm A. Nobs, S. Galen Smith 1949-7-21 1050 Lassen Small marshy creek, 1 mile E of Maderline, Comment
  UCD97105  Ranunculus sceleratus Malcolm A. Knobs; S. Galen Smith 1949-7-21 1050 Lassen ca. 1 mile east of Madeline. Comment
  CHSC44887  Ratibida columnifera Lowell Ahart; John Thomas Howell 1974-7-9 513 Lassen Near the south-west side of Eagle Lake. 1584 Comment
  CHSC13607  Ribes Lynn R Thomas 1969-4-17 93 Lassen 100 yds up slope w of back of Lassen Memorial Hospital, Susanville. Boundary between T29N and T30N. 1310 Comment
  CHSC7763  Ribes aureum Beverley J. Wise 1969-5-4 98 Lassen North shore of Leavitt Lake, south side Hwy 395. 1266 Comment
  CAS-BOT-BC225883  Ribes cereum B. Bartholomew; B. Anderson 1988-7-22 4503 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountains. 2080 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
  CHSC12425  Ribes cereum Anne Linda Brisk 1969-6-20 15 Lassen Found 1/4 mi NE ELBS in flat, basaltic, rocky area. 1554 Comment
  HSC95270  Ribes inerme var. inerme Gordon Leppig 1998-7-12 947 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC212579  Ribes montigenum Alice Eastwood 1912-8-22 1863 Lassen Trail from Morgan Springs to Lassen Butte Comment
  NY455349  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 miles east of Fredonyer Pass 1706.9 Comment
  HSC20330  Ribes roezlii Jim Vaughn 1956-8-5 Lassen Upper Hot Springs Creek, Devils Kitchen area, Mt. Lassen National Park 1829 Comment
  JEPS28697  Ribes roezlii George W. Gillett 1957-7-26 917 Lassen e shore Butte Lake; Lassen Volcanic National Park 1844 Comment
  RSA0024767  Ribes roezlii James Henrickson 1969-9-4 4267 Lassen 4 miles S of Westwood along Highway 147. 1390 Comment
  CHSC7760  Ribes velutinum Beverly J. Wise 1969-4-21 100 Lassen 2.6 mi south of Susanville on Old Dump Rd. 1341 Comment
  CHSC80652  Ribes velutinum V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10033 Lassen Northeast of Doyle in the Fort Sage Mtns, trailhead to top of mountain from the end of a 4WD road. 1798 Comment
  JEPS29198  Rigiopappus leptocladus Lauramay T. Dempster 1961-6-17 1672 Lassen Gold Run Creek about 4 mi sw of junction with Richmond Road (s of Susanville); Gold Run Creek Comment
  JEPS30485  Rigiopappus leptocladus Peter H. Raven and Otto T. Solbrig 1958-6-17 13302 Lassen along United States Highway 395 8.0 mi n Madeline Comment
  SEINET2054605 Image available Rigiopappus leptocladus Arnold Tiehm, Margaret Williams, Jan Nachlinger 1988-6-2 11700 Lassen South side of Shaffer Mt., 3.4 road miles North of the Wendel road on highway 395 from Susanville to Alturas, west of highway. 1386 Comment
  CHSC110910  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2012-7-9 18292 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99504  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2008-6-20 14937 Lassen On the edge of Big Valley Canal and in vernal pools, 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
  CHSC36472  Rorippa nasturtium-aquaticum Jeffrey R. Peek 1982-6-4 33 Lassen Ca. 50 yds along Willow Creek from its beginning in Murrers Upper Meadow. Comment
  CHSC36490  Rorippa nasturtium-aquaticum Theresa Costa 1982-6-4 36 Lassen Along Willow Creek in Murrers Upper Meadow. Comment
  SEINET10973519  Rorippa obtusa Mary Susan Taylor 1974-1 Taylor 278 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  JEPS121241  Rorippa palustris subsp. hispida Lowell Ahart, John Dittes 2013-7-22 18864 Lassen N margin of a duck field, about 100 yards E of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS127167  Rorippa palustris subsp. palustris Lowell Ahart, John Dittes 2016-7-15 21218 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  NY182185  Rorippa sinuata G. Schoolcraft 1983-6-28 1025 Lassen 1341.1 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
  CHSC99109  Rosa woodsii subsp. 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
  CAS-BOT-BC148258  Rosa woodsii var. ultramontana Louella Bass 1973-5-29 EV- 68 Lassen Elysian Valley - Sierra Nevada 1325 Comment
  POM90170  Rosa woodsii var. ultramontana Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  JEPS88430  Rotala ramosior Vernon H. Oswald and Lowell Ahart 1996-8-1 8105 Lassen sw of Westwood (Mountain Meadows Reservoir, ne of Indian Ole Dam); Mountain Meadows Reservoir 1539 Comment
  CHSC23481  Rubus leucodermis Wayne O. Baum 1971-7-5 71 -84 Lassen E. slope of Gallatin Peak. 2072 Comment
  CHSC60401  Rubus parviflorus Mary Ann Showers 1992-6-13 2556 Lassen Lassen Volcanic National Park. Southwest of Widow lake. 2072 Comment
  POM91623  Rubus parviflorus var. bifarius Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CDA2904  Rumex crispus Gordon Leppig 1998-7-12 962 Lassen Northern California Peatlands; Modoc National Forest, Blue Lake Ranch. 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
  CAS-BOT-BC109329  Rumex paucifolius G. Schoolcraft 1987-4-29 1689 Lassen Ash Valley RNA. 1554 Comment
  JEPS39934  Rumex salicifolius var. lacustris W. L. Jepson 1918-8-15 7997 Lassen Grasshopper Valley 1615 Comment
  UC1036083  Rumex salicifolius var. lacustris Annie M. Alexander and Louise Kellogg 1946-8-11 5152 Lassen 4 to 6 mi s Madeline Comment
  UC1520656  Rumex salicifolius var. lacustris Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9475 Lassen 0.7 mi w (1.1 km w) U. S. Hwy 395 (a valley road, from a turnoff 6.4 mi (10.3 km) s of Madeline); Madeline Plains 1615 Comment
  UC6951 Image available Rumex salicifolius var. lacustris M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  UC6952 Image available Rumex salicifolius var. lacustris M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake; ; Silver Lake, Lassen Co. Comment
  UC452556  Rumex salicifolius var. salicifolius Milo S. Baker Lassen n side Dixie Mt. Comment
  UC6962  Rumex salicifolius var. salicifolius M. S. Baker and F. Nutting 1894-7-1 Lassen Dixie Mts. Comment
  JEPS114648  Rumex salicifolius var. triangulivalvis Lowell Ahart, John Dittes 2008-6-20 14930 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS121294  Rumex triangulivalvis Lowell Ahart, John Dittes 2013-7-22 18867 Lassen 30 yards S of the man-made pond, about 120 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA0039530  Rumex triangulivalvis Lowell A. Ahart, John Dittes 2012-7-9 18302 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  SEINET4176560  Rumex venosus Cahlan 1932-5-31 1413 Lassen Between Doyle and Susanville Comment
  SEINET4176577  Rumex venosus M. J. Williams 1969-5-24 s.n. Lassen Near Doyle 1524 Comment
  CAS-BOT-BC445671  Sagittaria cuneata L. S. Smith 1918-7-22 1009 Lassen Modoc National Forest. Blue Lake 1874 Comment
  CHSC4993  Sagittaria cuneata R. Clicquennoi 1967-7-1 21 Lassen At edge of small roadside pool 16 mi n of Susanville on highway 139. 1524 Comment
  UC533  Sagittaria cuneata J. Burtt Davy Jun 17 1897-Jun 24 1897 3338 Lassen sloughs Susan River (Honey Lake Valley); , sloughs of Susan River 1219 Comment
  CAS-BOT-BC445673  Sagittaria cuneata George W. Gillett 1957-7-28 918 Lassen Lassen Volcanic National Park. Butte Lake 1844 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
  CHSC58514  Salix boothii Vernon H. Oswald 1992-7-3 5048 Lassen Trail from Juniper L. to Snag L., on the W edge of Cameron Meadow. 1950 Comment
  CAS-BOT-BC103456  Salix eastwoodiae G. Schoolcraft 1997-8-6 2666 Lassen Diamond Mtn. 2316 Comment
  CHSC65121  Salix eastwoodiae Vernon H. Oswald; Lowell Ahart 1995-7-24 7141 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
  CAS-BOT-BC107958  Salix geyeriana John Thomas Howell 1976-7-20 s.n. Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass - Sierra Nevada 1432 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
  CAS-BOT-BC128169  Salix lasiandra var. lasiandra Lowell Ahart 1974-5-5 911 Lassen Peter Ahart Ranch, Honcut - Sierra Nevada 45 Comment
  CHSC13668  Salix lemmonii E. L. Smith 1971-4-28 946 A Lassen On Dry Creek at Clear Creek Junction. 1493 Comment
  HSC95283  Salix petrophila Gordon Leppig 1998-7-12 938 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC126174  Salix scouleriana Hans Leschke 1964-9-3 1891 Lassen Cinder Cone, Lassen Volcanic Nat. Park Comment
  JEPS96090  Salix scouleriana Vernon H. Oswald and Lowell Ahart 1996-6-17 7770 Lassen on n side of Hwy 36 ca 0.2 mi e & mile post (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1432 Comment
  UCD170117  Salsola paulsenii R. Breckenridge; K. Filippini 2007-6-14 s.n. Lassen Wendell Plains. 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
  JEPS94499  Salvia aethiopis Vernon H. Oswald and Lowell Ahart 1997-5-27 8482 Lassen just n of Susanville (w side of Highway 139 at Lassen Community College); Lassen Community College, Highway 139 1310 Comment
  UC104453  Salvia aethiopis T. Brandegee 1892-6-30 Lassen streets of Susanville Comment
  CAS-BOT-BC238592  Sambucus nigra subsp. caerulea John Thomas Howell 1974-7-10 50548 Lassen Elysian Valley 1325 Comment
  UC1585882  Sambucus racemosa var. microbotrys Barbara Ertter 1988-7-25 7873 Lassen ridge of mts. ca 1.5 mi e Diamond Peak (ca 10 air mi s of Susanville); Diamond Mts. 2255 Comment
  POM90118  Sanguisorba annua Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  RSA74137  Sanicula tuberosa M. S. Baker 1952-5-23 12426 Lassen Hwy 36 E of Chester 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
  CDA23525  Sarcobatus vermiculatus M. R. Pryor 1953-9-22 Lassen 0.5 mile west of Jack Crow s property, Stacey. 0 Comment
  NY540264  Sarcobatus vermiculatus E. K. Balls 1952-10-10 18136 Lassen 5.2 miles west of Standish, Highway 395, Susanville to Alturas 1249.7 Comment
  UC1136498  Sarcobatus vermiculatus C. W. Hanks 1934-9-25 87 Lassen Long Valley s. of Honey Lake (near Plumas Nat'l Forest); Sierraville Quad., Long Valley Comment
  UCD101770  Sarcobatus vermiculatus Beecher Crampton 1960-6-19 5730 Lassen southeast of Karlo; along U.S. Hwy 395. 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
  CAS-BOT-BC466201  Sarcodes sanguinea Peter H. Raven; Otto T. Solbrig 1958-6-16 13254 Lassen Along State Hwy 36, 0.3 mi E of summit of Fredonyer Pass Comment
  JEPS1765  Saxifraga nidifica var. nidifica Milo S. Baker 1952-5-23 12422 Lassen e of Chester (Hwy 36) Comment
  CAS-BOT-BC283086  Schedonorus arundinaceus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49474 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 Comment
  UCD65649  Schedonorus arundinaceus John Thomas Howell; Gordon H. True and Margaret Williams 1973-6-28 49474 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  RSA300132  Schedonorus arundinaceus J. T. Howell, Gordon H. True 1973-8-1 50185 Lassen Gold Run Creek Road, south of Susanville, Diamond Range 1585 Comment
  POM111523  Schoenoplectus fluviatilis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  JEPS114854  Scirpus acutus var. occidentalis Lowell Ahart, John Dittes 2008-6-22 15018 Lassen On the east end of the levee, about 100 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber 1260 Comment
  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
  UC1100770  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-7-9 13298 Lassen irrigation ditch 5 mi e Bieber; e of Bieber Comment
  HSC95197  Scirpus microcarpus Gordon Leppig 1998-7-12 943 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1100464  Scribneria bolanderi Malcolm A. Nobs, S. Galen Smith, Herbert L. Mason 1949-5-29 759 Lassen Nubeiber, on Great Northern Railroad, Highway 299 Nubeiber; , Great Northern Railroad, Highway 299 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
  UC767449  Scrophularia desertorum R. F. Hoover 1940-9-28 4632 Lassen Susanville Comment
  CAS-BOT-BC214257  Scutellaria nana Clarence R. Quick 1964-8-1 64 -92 Lassen Cal Mt. east of Poison Lake 1767 Comment
  CAS-BOT-BC214264  Scutellaria nana M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  GMDRC7735  Scutellaria nana J. M. Andre, G. Clifton 1993-6-1 33412 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
  RSA128297  Scutellaria nana Peter H. Raven, Otto T. Solbrig 1958-6-17 13270 Lassen Along U.S. Highway 395, 19.0 miles south of Ravendale. Comment
  UC1037195  Scutellaria nana Leo Whitney 1934-7-10 1513 Lassen 14 mi w of Eagle Lake (near Harvey Valley); Lassen National Forest 1737 Comment
  UC726647  Scutellaria nana A. A. Heller 1938-6-23 15186 Lassen 1 mi s of Westwood 1524 Comment
  UC11232  Sedum stenopetalum M. S. Baker and Frank Nutting 1894-7-7 Lassen Harvey's Ranch Comment
  CAS-BOT-BC363325  Senecio aronicoides Jean Langenheim 1957-6-26 4372 Lassen Northwest Said Valley, north-eastern part of Lassen County Comment
  UC1184060  Senecio aronicoides Jean Langenheim 1957-6-26 4372 Lassen ne part Said Valley Comment
  CHSC23475  Senecio clarkianus Wayne O. Baum 1971-7-14 71 -61 Lassen N. slope of Gallatin Peak. 2011 Comment
  CHSC114299  Senecio eurycephalus var. lewisrosei B. Villegas 2010-6-17 Lassen South of Adin; Hwy. 139 at Milepost 58. On both sides of the road. Comment
  OBI76980  Senecio hydrophiloides Anthony Baniaga 2011-6-21 388 Lassen Lassen Natl Forest. Southern McCoy Flat. Spalding Tract quad T33N R10E sec 32 SE of SW 1700 Comment
  UCD135528  Senecio hydrophiloides Raymond D. Ratliff 1966-6-28 8 Lassen Lassen National Forest, Gooch Valley - Plot 70. 1828 Comment
  HSC95295  Senecio hydrophilus Gordon Leppig, J. Cromwell 1997-7-27 615 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  SEINET10534709  Senecio integerrimus Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3111 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  CAS-BOT-BC363856  Senecio integerrimus var. exaltatus Doris Kildale Gillespie 1930-5-13 9388 Lassen Between Susanville and Janesville Comment
  CHSC61620  Senecio integerrimus var. exaltatus Arthur C. Barrett 1915-7-1 2 Lassen Laufman Ranger Stat. 1463 Comment
  CAS-BOT-BC341186  Senecio lugens John Thomas Howell 1934-6-14 12159 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  JEPS100319  Senecio spartioides Dean W. Taylor 2001-7-12 17830 Lassen Diamond Mountains, headwaters of Rhodes Creek, along Forest Road 24N02X 1996 Comment
  CDA36706  Shepherdia argentea T. C. Fuller 1980-8-6 20320 Lassen Along a bench on the south slope of the Rush Creek Drainage, 0.3 km south of the Smoke Creek Ranch Road, 2 km west of the stateline. 0 Comment
  CHSC105238  Sidalcea glaucescens Lowell Ahart; John Dittes 2010-7-31 17016 Lassen On the south side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  UC1924263  Sidalcea glaucescens Debra Valov 2004-5-31 2004225 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  NY54618  Sidalcea oregana var. maxima N. H. Holmgren 1980-7-3 9479 Lassen Madeline Plains, Westside Road, 9 km (5.6 mi) west of U.S. highway 395, 16 km (10 mi) airline distance northwest of Termo 1620 Comment
  SD113389  Silene douglasii Darley F. Howe 1964-8-2 3917 Lassen East Creek, Warner Mountains, Modoc National Forest. 2010 Comment
  CAS-BOT-BC389552  Silene nuda John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49488 Lassen Elysian Valley. West of Janesville 1325 Comment
  UCD99020  Silene nuda E. Sawyer 1935-6-27 223 Lassen Long Valley. 1310 Comment
  NY813531  Silene nuda subsp. insectivora G. Schoolcraft 1988-7-7 1818 Lassen Southeast corner of Madeline Plains ca. 1 mile south of Horne Ranch 1646 Comment
  RSA715618  Sisymbrium altissimum L. Ahart, John Dittes 2005-6-1 11850 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  CAS-BOT-BC75078  Sisymbrium altissimum Barrett Anderson 1986-7-9 3123 Lassen Road to Day, about 2.4 km north of Route 299. 1065 Comment
  HSC102778  Sisyrinchium bellum L. Ahart, John Dittes 2008-6-20 14964 Lassen About 7.0 air mi. NE of Bieber, ~4.0 air mi. NE of Headquarters at Ash Creek State Wildlife Area; ~ 10 yds. west of where the levee road crosses Big Valley Canal, in Big Valley. 1264 Comment
  UC773859  Sisyrinchium idahoense L. R. Short, Wm. Gansberg 1936-6-11 S 430 Lassen Burgess Spring Esperiment Range; Lassen Forest 1730 Comment
  UC21381  Sium suave J. Burtt Davy Jun 17 1897-Jun 24 1897 3363 Lassen Honey Lake Valley Comment
  UC3888  Smilacina stellata J. Burtt Davy Jun 17 1897-Jun 24 1897 3387 Lassen Adobe Meadows Honey Lake Valley, Byer's Ranch Comment
  UCR88862  Smilacina stellata J. T. Howell, G. H. True, Margaret Williams 1973-6-28 49421 Lassen Sierra Nevada Mtns/ Modoc Plateau, Elysian Valley, west of Janesville 1326 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
  CDA8717  Solidago californica Gary Schoolcraft 1994-8-29 2426 Lassen About 1 mile west of Susanville up Piute Creek. Comment
  HSC21340  Sparganium angustifolium R. G. Means 1962-7-4 71 Lassen Hwy. 139 at Slate Creek 1616 Comment
  CAS-BOT-BC374759  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1998-6-29 2319 Lassen Ash Valley along main road crossing Ah [Ash] Crk. 1554 Comment
  SEINET11170749  Sphenosciadium capitellatum C. G. Gulling 1905-1 1562 Lassen Big Meadows. Comment
  CAS-BOT-BC149627  Spiraea douglasii B. C. Cain 1925-8-24 80 Lassen 1 mile below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  HSC95180  Spiranthes porrifolia Gordon Leppig, J. Cromwell 1997-7-27 603 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  HSC95184  Spiranthes porrifolia Gordon Leppig 1998-8-17 1038 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET3818362  Spiranthes romanzoffiana A. A. Heller 1938-1 Lassen Comment
  UC773921  Stachys ajugoides var. rigida L. R. Short and Wm. Gansberg 1936-7-9 S- 485 Lassen Burgess Spring Experiment Range Lassen Forest 1795 Comment
  CHSC64776  Stanleya pinnata var. pinnata Vernon H. Oswald 1995-6-7 6841 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) near milepost 19.5 just w of Skedaddle Creek, e of Wendel, ne of Susanville. Flat bordering the road. 1237 Comment
  CDA25155  Stanleya viridiflora L. Bass 1982-7-25 Oct- 82 Lassen Near Karlo, about 12 miles north of Litchfield. Comment
  POM101721  Stellaria longipes F. H. Hillman 1897-7-12 s.n. Lassen Chat Comment
  SEINET11933235  Stellaria longipes J. D. Prouty 1978-1 29 Lassen S of Eagle L., along Papoose Creek, ca 1 mi from Gallatin Rd., T31N, R11E, Sec. 17 1591 Comment
  CAS-BOT-BC391078  Stellaria longipes subsp. longipes Louella Bass 1973-5-29 87 Lassen Elysian Valley 1325 Comment
  HSC95299  Stellaria longipes subsp. longipes Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 544 Lassen Modoc National Forest, Blue Lake Ranch 1970 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
  JEPS107846  Stellaria longipes var. longipes Lowell Ahart, John Dittes 2005-6-2 11992 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1427 Comment
  UC120067  Stellaria longipes var. longipes unknown 1892-6-23 Lassen Honey Lake Comment
  CHSC92676  Stenotus acaulis L. P. Janeway; B. Castro 2005-7-10 8487 Lassen Northern High Sierra Nevada. Crest of Diamond Mountains over-looking the northwest end of Honey Lake, more or less at the north end of Stony Ridge. Northeast edge of low flat ridge. 1993 Comment
  RSA713119  Stenotus acaulis L. P. Janeway, B. Castro 2005-7-10 8487 Lassen Northern High Sierra Nevada. Crest of Diamond Mountains overlooking the NW end of Honey Lake, more or less at the north end of Stony Ridge. 1993 Comment
  CDA19745  Stenotus stenophyllus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Eagle Lake. 0 Comment
  CAS-BOT-BC375067  Stephanomeria Clare B. Hardham 1969-8-28 17423 Lassen Slope west of Janesville Comment
  UC303058  Stephanomeria lactucina Pearl Safford Lassen Susanville [uncertain locality] Comment
  RSA518409  Stephanomeria virgata George K. Helmkamp 1990-9-23 E 14 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  UCR67447  Stephanomeria virgata George K. Helmkamp 1990-9-23 D- 8 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  HSC24234  Stipa comata John Pratt 1970-6-27 49 Lassen .5 mi. E of Turtle Head Comment
  UC1140903  Stipa exigua L. D. Whitney 1935-6-16 3272 Lassen base Crater Mt. Comment
  HSC80000  Stipa hymenoides William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  JEPS126469  Stipa thurberiana Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-18 CA 350 -039 Lassen Take 139 towards Antelope Grade and take a right after passing the fire station. Continue on dirt road for less than 0.5 miles. Comment
  SEINET10448890  Streptanthus cordatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 470 Lassen 6 mi. N. Of hallelujah jct. On us 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge and in sandy wash. 1402 Comment