Search Results — 2000 specimen records retrieved (1600 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
 Records are made available under the CCH Data Use Terms.

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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC27595  Achillea millefolium Jeff D. Prouty 1978-7-10 27 Lassen W shore of Coleman Lake, S of Eagle Lake L. 1956 Comment
  CHSC4909  Achillea millefolium A. E. Anderson 1967-7-1 67 Lassen Along fence n of road to Murrer Ranch, 1 mi. from ranch buildings. 1371 Comment
  UC506903  Achillea millefolium George A. Fischer and Irwin H. Johnson 1933-7-14 F 275 Lassen Patterson Flat; Lassen National Forest 1737 Comment
  UCD50374  Achnatherum hymenoides P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia, California. Lassen County. Comment
  UCD50593  Achnatherum lemmonii L. Whitney 1933-7-7 s.n. Lassen Halls Flat, Lassen County. 1737 Comment
  UCD18959  Achnatherum nelsonii Jack N. Reppert 1965-7-13 17 Lassen Lassen National Forest, Harvey Valley Allotment (HV-17). 1682 Comment
  SEINET249960 Image available Achnatherum nevadense Beecher Crampton 1954-7-5 2064 Lassen 4.5 miles west of Susanville, along state highway 36. 1433 Comment
  UCD50843  Achnatherum nevadense B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  SEINET11695935  Achnatherum nevadense Unknown 1960-6-18 5729 Lassen southern Warner Mountains, 1.25 mi N of Blue Lake, in vicinity of Blue Lake Ranch 1981 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-BC218614  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49191 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  UC1137654  Achnatherum occidentale subsp. pubescens George A. Fischer and Irwin H. Johnson 1933-7-12 218 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen National Forest 1722 Comment
  RSA700231  Achnatherum thurberianum L. P. Janeway 2001-6-20 7205 Lassen High Cascade Range. 0.6 km east of Road 111 and 1.3 km south of Road 35N60; about 11 km west of Little Valley, 3.9 km east-northeast of Coble Mountain. 1402 Comment
  SEINET235273 Image available Achnatherum thurberianum CSU Chico Lassen unspecified Comment
  UC1024911  Achnatherum thurberianum Leo Whitney 1935-6-25 3372 b Lassen ca 13 mi w of upper end Eagle Lake; Ashurst Mountain Comment
  UC1031349  Achnatherum thurberianum Leo Whitney 1935-6-18 3267 Lassen 13 mi w Eagle Lake; Lassen National Forest, Ashurst Mountain 1584 Comment
  UC1031354  Achnatherum thurberianum Leo Whitney 1935-6-19 3258 Lassen 13 mi w of upper end Eagle Lake; Lassen National Forest, Ashurst Mt. 1584 Comment
  UCD51427  Achnatherum thurberianum B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  CAS-BOT-BC217992  Achnatherum webberi Clare B. Hardham 1969-8-28 17430 Lassen Slope W of Janesville Comment
  UCD32671  Achnatherum webberi Beecher Crampton 1954-7-6 2074 Lassen Lassen County, 15 miles south of Ravendale, along US highway 395. 1676 Comment
  UCD51302  Achnatherum webberi L. Whitney 1935-7-31 3587 Lassen Ashurst Mt. Comment
  CHSC29897  Acmispon americanus var. americanus Robin L. Ondricek 1978-7-7 91 Lassen Below the dam in Murrers Upper Mdw. 1548 Comment
  CHSC29909  Acmispon americanus var. americanus Robin L. Ondricek 1978-7-15 99 Lassen East side of Lower Dry Lake. 1645 Comment
  CHSC5075  Acmispon americanus var. americanus D. L. Stites 1967-7-8 121 Lassen Ca. 18 mi n of Susanville. 1371 Comment
  CHSC91301  Acmispon americanus var. americanus Lowell Ahart; John Dittes 2005-6-2 11970 A Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  JEPS127283  Acmispon americanus var. americanus Lowell Ahart, John Dittes 2016-7-13 21119 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS60356  Aconitum columbianum Brown and Wieslander 1922-7-30 20 Lassen Eagle Lake, Martin Springs Comment
  UCD98583  Aconogonon davisiae Hans Leschke 1945-9-14 s.n. Lassen Mt. Lassen trail. 2621 Comment
  CAS-BOT-BC391608  Actaea rubra Louella Bass 1973-6-17 119 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC110715  Aegilops cylindrica John Thomas Howell 1974-7-8 50505 Lassen Sierra Nevada. Susanville. 1295 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen Comment
  CHSC12963  Agastache parvifolia L. B. Barlow 1967-6-30 51 Lassen West central shore of Eagle Lake, 1/2 mi. south of Pelican Point. 1554 Comment
  CHSC5269  Agastache parvifolia J. B. Kimsey 1946-6-10 Lassen 1615 Comment
  UC1483811  Agastache urticifolia G. Schoolcraft 1979-7-5 122 Lassen n face Observatioin Peak; n face of Observation Peak 1828 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
  UC468890  Agoseris X dasycarpa J. Burtt Davy Jun 17 1897-Jun 24 1897 3405 Lassen Chat Long Valley Comment
  UC468891  Agoseris X dasycarpa J. Burtt Davy Jun 17 1897-Jun 24 1897 3404 Lassen Chat Honey Lake Valley, Long Valley Comment
  CHSC7649  Agoseris aurantiaca Beverly J. Wise 1969-5-18 10 Lassen Alongside Susan River. 1615 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
  JEPS100463  Agoseris grandiflora Dean W. Taylor 2001-6-28 17818 Lassen Diamond Mountains, Crystal Peak, along ridgeline at the summit 2377 Comment
  JEPS103193  Agoseris grandiflora G. Schoolcraft 2000-6-19 2904 Lassen West of Cold Spring Valley 1706 Comment
  JEPS118267  Agoseris heterophylla Lowell Ahart, John Dittes 2011-6-20 17485 Lassen About 15 yards west of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  POM34510  Agoseris heterophylla Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  SEINET6738695 Image available Agoseris heterophylla M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-12 80- 19 -1 Lassen Smoke Creek Rd., 0.1 mile E of Hwy 395 1372 Comment
  UC1048141  Agoseris heterophylla var. heterophylla unknown 1937-1 475 Lassen Red Rock Comment
  UC1924573  Agoseris heterophylla var. heterophylla Debra Valov 2006-5-29 2006023 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1280 Comment
  UC1136777  Agoseris parviflora L. R. Short and J. Warren 1936-6-5 S- 372 Lassen Burgess Spr. Exp. Range Lassen National Forest 1798 Comment
  UC585114  Agoseris parviflora E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1793 Lassen about 2 mi n Madeline 1363 Comment
  JEPS88236  Agropyron desertorum Vernon H. Oswald and Lowell Ahart 1996-6-17 7800 Lassen 7 mi w of Susanville (1 mi e of Devils Corral Trailhead, Bizz Johnson Trail (accessed at Devils Corral Trailhead), off Hwy 36); Modoc Plateau 1420 Comment
  SEINET10509726  Agropyron desertorum Billy Joe Cox 1971-6-2 Cox 3227 Lassen 5 mi s of milford near honey lake on us hwy 395; along roadside in grass, Jeffery pine on mts range to w at approximately the same altitude. 1250 Comment
  UC1137133  Agrostis alba August L. Hormay 1932-7-20 Lassen Bogard Ranger Station Lassen National Forest, Bogard Ranger Station Comment
  SACT000106  Agrostis exarata Malcolm Nobs, S. Smith 1949-7-21 Lassen shallow marshy stream from springs, 4 miles north of madeline Comment
  UC1024693  Agrostis exarata Leo Whitney 1933-8-2 2152 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CAS-BOT-BC139678  Agrostis gigantea John Thomas Howell 1975-7-23 51401 Lassen Sierra Nevada. Susanville. 1295 Comment
  UCD53120  Agrostis pallens Leo Whitney 1934-7-10 2225 Lassen near Harvey Spring, Harvey Valley, 14 miles west of Eagle Lake, Lassen National Forest. 1737 Comment
  UC1137058  Agrostis scabra August L. Hormay 1932-7-20 Lassen Bogard Ranger Station Lassen National Forest Comment
  POM98581  Agrostis scabra F. W. Peirson 1926-6-22 6808 Lassen margin of Boiling Lake, Mt. Lassen National Park Comment
Read comments
Apr 23 2013
  JEPS123839  Agrostis stolonifera Lowell Ahart, John Dittes 2015-7-14 20335 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UC60211  Agrostis stolonifera J. Burtt Davy Jun 17 1897-Jun 24 1897 3307 Lassen Tule Confederacy Honey Lake Valley Comment
  UC53478  Agrostis variabilis M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  SEINET7594432 Image available Agrostis variabilis George W. Gillett 1957-1 927 Lassen Lassen Volcanic National Park, Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake. Dry wash 100 yards above trail junction. 1859 Comment
  POM75042  Aliciella lottiae Marcus E. Jones 1897-6-22 9875 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 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
  NY247822  Allium bidwelliae R. M. Austin 06 1879 s.n. Lassen Pine Creek Meadows. Comment
  UC1924588  Allium lemmonii Debra Valov 2006-5-29 2006018 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1271 Comment
  UC843374  Allium lemmonii C. L. Hitchcock 1940-5-26 6640 Lassen overflow of Pitt River 1 mi w Bieber; Pitt River Comment
  SEINET3885792  Allium lemmonii Noel H. Holmgren, Patricia K. Holmgren 1978-6-12 8934 Lassen Upper Smoke Creek, just south of Observation Peak, 17 km (10.5 mi.) airline distance east-southeast of Ravendale.; 0 1768 Comment
  CHSC7185  Allium parvum Lynn R. Thomas 1969-4-17 90 Lassen 100 yds n of Ward Lake, ca. 15 mi e of Susanville. 1280 Comment
  CHSC7662  Allium parvum Beverley J. Wise 1969-4-10 139 Lassen 2.5 mi. south of Susanville on Las. Co. Rd. 204. 1310 Comment
  CAS-BOT-BC474049  Allium parvum G. Schoolcraft 1998-4-27 2704 Lassen N. end of Ft. Sage Mtn 1859 Comment
  JEPS103165  Allium parvum Beth Corbin 2002-4-11 1055 Lassen Near Skedaddle Ranch Rd, ca 1/2 mi ENE of East Side Reservoir. 1493 Comment
  CAS-BOT-BC171316  Alnus incana subsp. tenuifolia John Thomas Howell; Gordon H. True 1973-8-1 50223 Lassen Headwaters of Boxter Creek, Canadian Zone forest, E slope of Diamond Range s of Susanville. Sierra Nevada Comment
  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
  UC1024654  Alopecurus aequalis Leo Whitney 1933-8-4 2200 Lassen ca. 8 mi. n.w. Eagle Lake (Slate Creek); Lassen Nat'l Forest, Slate Creek 1920 Comment
  UC576312  Alopecurus aequalis H. S. Yates 1936-8-12 6082 Lassen McKenzie Meadow Susanville Quad., McKenzie Meadow 1524 Comment
  UCD55830  Alopecurus aequalis L. Whitney 1933-8-4 2200 Lassen Lassen National Forest, ca. 8 miles northwest of Eagle Lake, Slate Creek. 1920 Comment
  UCD55845  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen 10 miles W of Chester, rte 36. Comment
  UCR80283  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen Route 36, 10 mi west of Chester 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
  CAS-BOT-BC138012  Alopecurus geniculatus Peter H. Raven; Otto T. Solbrig 1958-6-17 13299 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline. Comment
  UC1130817  Alopecurus geniculatus A. Simontacchi 1940-5-17 745 Lassen 5.9 mi. s. Patterson Mt.; Lassen Nat'l Forest, Halls Flat Quad. Comment
  UCD18957  Alopecurus geniculatus Raymond D. Ratliff 1965-7-22 20 Lassen Lassen National Forest, Harvey Valley Allot. (HV 78-73). 1706 Comment
  UC1924568  Alopecurus pratensis Debra Valov 2006-5-28 2006040 Lassen Bieber off County Rd. A2 c. 12 km east of Hwy 299 1279 Comment
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  CHSC107996  Alyssum minus subsp. micranthum Lowell Ahart; John Dittes 2011-6-20 17493 Lassen About 20 yards east of the stream, about 80 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC67190  Alyssum minus subsp. micranthum James D. Jokerst 1991-5-28 3293 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, ca. 400 ft E of the highway on slopes above road, S of a small canyon mouth. 1554 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
  CHSC76262  Amaranthus powellii Lowell Ahart; Vernon H. Oswald 1999-9-13 8226 Lassen Along a small slough on the north side of Mapes Road, about 1/2 mile east of lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 Comment
  CHSC66845  Ambrosia acanthicarpa Vernon Oswald 1996-10-3 8298 Lassen North of Susanville on Horse Lake Road (Lassen 546) 3.6 mi E of Hwy. 139. Modoc Plateau. 1554 Comment
  UCR67435  Ambrosia acanthicarpa George K. Helmkamp 1990-9-23 A- 3 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  CAS-BOT-BC42889  Ambrosia acanthicarpa P. Monnet 1913-8-1 966 Lassen unspecified Comment
  CHSC29918  Amelanchier alnifolia var. pumila Robin L. Ondricek 1978-5-25 26 Lassen .5 mi S of tunnel crossing on road to Eagle Lake Field Station. 1554 Comment
  RSA166673  Amelanchier pallida Alfred Richardson 1961-5-30 8 Lassen S of Eagle Lake. 1402 Comment
  SD43502  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  UC1137669  Amelanchier utahensis George A. Fischer and Irwin H. Johnson 1933-7-14 F 270 Lassen Lassen Forest 1737 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
  CHSC5244  Amphiscirpus nevadensis 1946-6-25 Lassen Eagle Lake. 1554 Comment
  CHSC60784  Amphiscirpus nevadensis Vernon H. Oswald; Lowell Ahart 1993-6-14 5521 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). Shallow depressions among low dunes on the upper beach between the road and the lake. 1566 Comment
  SEINET10455819  Amsinckia menziesii Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2582 Lassen 6 mi S of Adin; along CA Hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  UCD119818  Amsinckia tessellata John Thomas Howell 1934-6-10 11842 Lassen Near Plumas Junction. Comment
  POM33879  Anisocoma acaulis Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.?] 1220 Comment
  CAS-BOT-BC63954  Antennaria argentea John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49454 Lassen Elysian Valley, west of Janesville 1325 Comment
  UC1125575  Antennaria argentea A. Simontacchi 1940-6-23 886 Lassen 3.2 mi sw Schoonamaker Lake; Halls Flat Quad. 1920 Comment
  CAS-BOT-BC26644  Antennaria argentea subsp. aberrans Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC69137  Antennaria geyeri John Thomas Howell 1934-7-9 12520 Lassen Pine Creek Flat Comment
  CAS-BOT-BC69138  Antennaria geyeri Milo S. Baker 1894-7-12 s.n. Lassen Pine Creek Comment
  CHSC86973  Antennaria geyeri L. P. Janeway 2001-6-20 7206 Lassen High Cascade Range. 0.6 km east of Road 111 and 1.3 km south of Road 35N60; about 11 km west of Little Valley, 3.9 km east-northeast of Coble Mountain. 1402 Comment
  CAS-BOT-BC58694  Antennaria luzuloides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16360 Lassen Near NE end of Eagle Lake Comment
  UC1137668  Antennaria luzuloides George A. Fischer and Irwin H. Johnson 1933-7-14 F 241 Lassen below Patterson R. S.; Lassen National Forest 1737 Comment
  CHSC68842  Antennaria rosea subsp. confinis Vernon H. Oswald; Lowell Ahart 1997-6-24 8647 Lassen South of Susanville at the small pond on the crest of Diamond Mtn., about mid-way between Aspen Flat and Red Rock Lookout. 2249 Comment
  UC885063  Antirrhinum vexillocalyculatum subsp. breweri C. L. Hitchcock 1940-5-26 6597 a Lassen ca 12 mi n Fall River Mills, Shasta County (on Fall River); Fall River 1371 Comment
  JEPS120872  Apera interrupta Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18733 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
  JEPS96088  Apocynum androsaemifolium Vernon H. Oswald and Lowell Ahart 1996-6-17 7777 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead off Hwy. 36, n. side of Hwy. 36 between trail and hwy. bridges spanning the Susan R.); Modoc Plateau 1432 Comment
  POM75751  Apocynum pumilum var. rhomboideum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CHSC6240  Aquilegia formosa M. West 1946-6-17 Lassen Aspen Grove on Mt. Fredonyer 2133 Comment
  UC773880  Aquilegia formosa L. R. Short 1936-6-26 S- 407 Lassen Lassen National Forest, Burgess Spr. Exp. Range 1837 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
  SEINET5337698  Aquilegia formosa var. truncata C. G. Gulling 1905-1 1544 Lassen Big Meadows Comment
  UC773931  Arabis L. R. Short 1936-6-1 S- 354 Lassen Burgess Spring Experiment Range Lassen Forest 1859 Comment
  HSC82265  Arabis holboellii var. retrofracta Thomas W. Nelson, Jane P. Nelson 1980-7-6 5992 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  NY119422  Arabis rectissima R. C. Rollins 1983-7-5 83227 Lassen 2 miles S of Eagle Lake Summit Comment
  SEINET5340852  Arabis sparsiflora var. subvillosa R. C. Rollins, K. W. Rollins 1981-5-31 81178 Lassen Just north of Eagle Lake. Comment
  POM339728  Arctostaphylos manzanita subsp. manzanita F. R. Fosberg 1969-8-16 51425 Lassen (California Registered Historical Landmark 678) 10 mi. west of Susanville. Comment
  CAS-BOT-BC45906  Arctostaphylos nevadensis Marcus E. Jones 1897-7-7 s.n Lassen Lassen's Peak 1828 Comment
  UC1137649  Arctostaphylos patula A. Simontacchi 1940-5-13 703 Lassen 4.1 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC7703  Arctostaphylos patula subsp. gankinii Beverley J. Wise 1969-5-9 41 Lassen 11 mi. west of Susanville on Forest Serv. Rd. 8246 off Hwy 36. 1524 Comment
  CHSC23558  Arctostaphylos patula subsp. patula W. O. Baum 1971-6-21 41 Lassen E slope of Gallatin Peak on fire trail. 1920 Comment
  RSA702604  Arenaria congesta L. P. Janeway 2004-6-26 8141 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
  JEPS94556  Arenaria kingii var. glabrescens Vernon Oswald and Lowell Ahart 1997-6-24 8633 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
  CHSC7771  Argemone munita Beverly J. Wise 1969-6-4 73 Lassen North edge of Milford, roadside, Hwy 395. 1310 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
  CHSC65320  Argemone munita subsp. rotundata Vernon H. Oswald; Lowell Ahart 1995-8-14 7204 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) near the S end of Horse Lake, 15.3 mi W of Hwy. 395, N. of Susanville. 1566 Comment
  CAS-BOT-BC401788  Argemone munita subsp. rotundata John Thomas Howell 1924-8-13 638 Lassen Honey Lake Comment
  UC1037334  Argemone rotundata Leo Whitney 1934-8-5 1959 Lassen 10 mi se of Susanville (Harvey Lake Valley); Harvey Lake Valley 1402 Comment
  CHSC107316  Arnica chamissonis 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
  JEPS35887  Arnica chamissonis Brown and Wieslander 1922-7-30 26 Lassen Martin Springs , Eagle Lake Comment
  CHSC99739  Arnica chamissonis subsp. foliosa Lowell Ahart; John Dittes 2008-6-20 14902 Lassen In a wet meadow, about 150 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  RSA505386  Arnica chamissonis subsp. foliosa R. C. Bacigalupi, G. Thomas Robbins 1955-7-20 5414 Lassen Along Mosquito Creek in Corporation Meadow, Modoc National forest, southern end of Warner Mountains 2043 Comment
  CAS-BOT-BC82312  Arnica cordifolia H. D. Ripley; R. C. Barneby 1943-6-14 5725 Lassen Fredonyer Pass 1676 Comment
  CHSC5221  Arnica dealbata 1944-7-26 Lassen Juniper Lake. 2055 Comment
  CAS-BOT-BC82678  Arnica longifolia L. S. Smith 1918-7-22 1007 Lassen Blue Lake, Modoc National Forest 1874 Comment
  CAS-BOT-BC82712  Arnica longifolia James Jokerst 1983-7-23 1870 Lassen Grasshopper Valley Quad. Near Madeline Plains 1614 Comment
  RSA455868  Arnica longifolia Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  JEPS109852  Arnica sororia Dean W. Taylor 2006-6-29 19559 Lassen Longs Cabin (ca. 12 air miles NE of Old Station) 1783 Comment
  UCD129144  Arnica sororia G. Schoolcraft 1994-6-9 2298 Lassen Ash Valley RNA between Adin and Madeline, CA. 1600 Comment
  CHSC118795  Artemisia arbuscula subsp. arbuscula L. P. Janeway 2015-8-9 11823 Lassen Warner Mountains. Along Road 39N06 at the 64 Road (39N01- the road to Patterson Camprgound); 0.7 air-km west of Long Valley, 5.3 air-km northeast of Blue Lake. 2179 Comment
  RSA359361  Artemisia arbuscula subsp. arbuscula L. M. Shultz, John Shultz 1985-6-23 8603 Lassen 41 miles north of Susanville on Hwy 395. 1433 Comment
  UCD129263  Artemisia biennis Malcolm A. Nobs; Galen Smith 1949-8-20 1482 Lassen Long Creek, 1 mile north of Doyle, Honey Lake Valley. Comment
  SEINET222925 Image available Artemisia cana A. A. Beetle 1957-8-16 Lassen Lassen County: Between Ravendale and Termo. Comment
  SEINET6775323 Image available Artemisia cana subsp. bolanderi G. Schoolcraft 1979-10-3 198 Lassen In Dry Valley, just west (0.25 miles) of Dry Valley Gap 1615 Comment
  UC747153  Artemisia cana subsp. bolanderi G. Thomas Robbins 1945-10-18 2157 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  SBBG95820  Artemisia douglasiana G. K. Helmkamp 1990-9-23 E- 15 Lassen 20 mi N of Litchfield, along US Hwy 395 1432 Comment
  CAS-BOT-BC93741  Artemisia ludoviciana subsp. incompta Clare B. Hardham 1969-8-28 17463 Lassen Sierra Nevada - slope west of Janesville Comment
  UC1776685  Artemisia ludoviciana subsp. ludoviciana G. Schoolcraft 1999-8-11 2878 Lassen East edge of Madeline Plains E of Ravendale, CA 1627 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
  JEPS28804  Artemisia tridentata George W. Gillett 1957-9-4 1132 Lassen near Butte Lake (intersection of the Widow Lake-Snag Lake trails); Lassen Volcanic National Park 1859 Comment
  JEPS37013  Artemisia tridentata subsp. tridentata W. L. Jepson 1918-8-15 7996 Lassen Madelin Plains 1615 Comment
  SEINET230064  Artemisia tridentata subsp. tridentata Leila M. Shultz, John S. Shultz 1985-6-23 8611 Lassen Long Valley Creek drainage, 5 miles north of Doyle 1305 Comment
  UC74062  Artemisia tridentata subsp. tridentata J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley, Amedee Comment
  SEINET10580351  Asclepias cordifolia Alice Eastwood, John Thomas Howell 1940-6-11 Eastwood 7995 Lassen Nubieber Comment
  CHSC6222  Asclepias fascicularis M. West 1946-7-10 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CDA5651  Asperugo procumbens Ancell May 1940 Lassen Susanville. 0 Comment
  RSA18259  Aster breweri C. B. Wolf 1929-9-1 3783 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  POM39868  Aster campestris Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CHSC66718  Aster elatus Vernon H. Oswald; Lowell Ahart 1996-8-1 8120 B Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. 1737 Comment
  UCR67471  Aster foliaceus George K. Helmkamp 1990-9-23 G- 12 Lassen north of Ravendale 1677 Comment
  RSA504836  Aster modestus Bruce Bartholomew, B. Anderson 1988-7-22 4499 Lassen Mosquito Creek, 2km SW of Patterson Meadow, southern end of the Warner Mtn. 2080 Comment
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Jan 31 2013
  UCD105587  Astragalus Grady L. Webster 1989-5-13 7720 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  SEINET10484167  Astragalus Mary Susan Taylor 1982-5-29 Taylor 4561 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
  RSA0006693  Astragalus agrestis H. D. Ripley, R. C. Barneby 1944-5-30 5976 Lassen North of Termo; 1662 Comment
  CAS-BOT-BC177442  Astragalus andersonii Alice Eastwood; John Thomas Howell 1940-6-16 8332 Lassen Near Susanville Comment
  UC585206  Astragalus andersonii E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1754 Lassen nw-facing slope of ridge e Red Rock; ridge e of Red Rock 1615 Comment
  UC84393  Astragalus andersonii T. Brandegee 1892-6-30 Lassen Janesville Comment
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Oct 22 2007
  SEINET10450638  Astragalus andersonii David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17802 Lassen 6 mi n of hallelujah jct. On us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine alon ghigh ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC27614  Astragalus anxius Robert J. Meinke; Kaye 1991-7-16 6108 Lassen Ash Valley, ca. 25 km W of Madeline, along Ash Valley Rd. 1550 Comment
  CHSC63394  Astragalus anxius V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6351 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
  HSC61704  Astragalus anxius Thomas W. Nelson, Jane P. Nelson 1980-7-6 5988 Lassen In Ash Valley along Adin-Madeline Rd. 16 mi. E of Adin. Comment
  RSA614442  Astragalus anxius M. L. Carlson 1996-6-11 4202 Lassen 16 miles southeast of Adin on County Road 527 Comment
  NY790603  Astragalus argophyllus var. argophyllus A. Tiehm 1986-5-12 10347 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  CAS-BOT-BC178761  Astragalus canadensis var. brevidens John Thomas Howell 1934-7-8 12504 Lassen Spalding's, Eagle Lake Comment
  RSA415412  Astragalus canadensis var. brevidens Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CHSC118474  Astragalus canadensis var. brevidens Don Lepley 2016-9-17 6 /28/2015 Lassen Eagle Lake Ranger District. Southwest corner of Eagle Lake, roughly a half-mile northeast of entrance of Christie Campground, near end of rough road past Eagle Lake Resort. UTM 683577 x 4493277 1559 Comment
  CHSC60899  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald; Lowell Ahart 1993-7-8 5662 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Edge of woods between the road and railroad. 1709 Comment
  JEPS54557  Astragalus curvicarpus var. curvicarpus T. Brandegee 1892-6-23 Lassen Honey Lake Comment
  NY803536  Astragalus curvicarpus var. curvicarpus P. Gallian 1971-6-2 509 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402 Comment
  NY803538  Astragalus curvicarpus var. curvicarpus G. Schoolcraft 1993-6-10 2286 Lassen Along US Highway 395 near road to Clark Ranch 1280 Comment
  NY803534  Astragalus curvicarpus var. curvicarpus D. W. McNeal 1983-6-5 2839 Lassen Beside Highway 395, 9.2 miles north of the Plumas Co. line Comment
  SEINET7103940  Astragalus curvicarpus var. curvicarpus D. W. McNeal 1983-6-5 2839 Lassen Hwy #395, 9.2 mi N of the Plumas Co. line.; 0 Comment
  JEPS95714  Astragalus filipes Vernon H. Oswald and L. Ahart 1995-6-19 6883 Lassen T30N R15E NE1/4 SE1/4 Sect. 22, 4500 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395. Erect, many-stemmed herbaceous perennial. Corolla pale cream. 1371 Comment
  NY658507  Astragalus filipes G. Schoolcraft 1981-6-15 460 -B Lassen Ash Valley 1554.5 Comment
  SBBG30554  Astragalus filipes D. Myrick 1968-6-19 1959 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  UC1537108  Astragalus filipes Gordon H. True Jr. 1938-7-9 911 Lassen Madeline Plains near Termo; Madeline Plains near Termo 1524 Comment
  SEINET231384 Image available Astragalus filipes Margaret J. Williams 1983-7-31 83- 125 -1 Lassen Ash Valley Road, 17 mi from Aden 1829 Comment
  UCD104699  Astragalus filipes Michael A. Vincent 1999-6-9 8579 Lassen Bureau of Land Management land; Madeline Plains. Southwest of US Rt. 395, southeast of CR 515 (Termo Road), south of BLM Rd. 1614, and southwest of Termo. Along jeep road to Schott Canyon. Comment
  RSA415413  Astragalus gibbsii Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  SEINET948354  Astragalus gibbsii Philip A. Munz 1947-1 11889 Lassen Milford 1265 Comment
  UC1332123  Astragalus gibbsii Alice Eastwood and John Thomas Howell 1940-6-16 8336 Lassen near Susanville Comment
  CDA26675  Astragalus gibbsii Taylor Jun 1938 Lassen Susanville. 0 Comment
  NY674270  Astragalus gibbsii K. Morris 1973-5-25 214 Lassen 4 miles south of Susanville, on US 36 Comment
  POM24782  Astragalus gibbsii Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 6 miles below Eagle Lake. Comment
  CAS-BOT-BC186944  Astragalus iodanthus G. Schoolcraft 1998-6-30 2744 Lassen N. slope of N. end of Ft. Sage Mtns. 1950 Comment
  CHSC115597  Astragalus lemmonii Lowell Ahart; John Dittes 2015-7-14 20336 Lassen On the west side of the road, 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. 1267 Comment
  UCD55267  Astragalus lentiginosus Ellen Dean 2006-5-15 3065 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1249 Comment
  NY675574  Astragalus lentiginosus var. floribundus N. H. Holmgren 1980-7-5 9520 Lassen Upper Smoke Creek drainage, 20.4 km (12.7 miles) from U. S. Highway 395 via Rye Patch Canyon, 24 km (15 miles) airline distance southeast of Ravendale 1580 Comment
  CHSC67216  Astragalus lentiginosus var. platyphyllidius James D. Jokerst 1991-5-29 3310 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, top of plateau E of N basin, W of N-S oriented dirt road. 1737 Comment
  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
  POM45582  Astragalus malacus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  HSC63126  Astragalus malacus Teresa Prendusi 1980-4-28 1101 Lassen Rice Canyon 1341 Comment
  CAS-BOT-BC192842  Astragalus pulsiferae Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  CAS-BOT-BC192845  Astragalus pulsiferae Margaret Williams; Steven Williams 1974-7-26 74 -L-16 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC98309  Astragalus pulsiferae var. coronensis R. Ondricek-Fallscheer 2003-6-7 210 Lassen About 27 air mi NE of Susanville, 9 air mi SSE of Ravendale, and 0.5 air mi NW of Rye Patch Springs; 0.5 mi E of Hwy 395 and 150 ft. N of road to Ramhorn Springs Campground. 1615 Comment
  SEINET4853425  Astragalus pulsiferae var. coronensis Unknown 2001-6-14 28158 Lassen E of Hwy 395, rd to Rams Horn Spring campground. 1540 Comment
  CHSC7668  Astragalus purshii Beverley J. Wise 1969-4-21 57 Lassen 6 mi. south of Susanville on Las. Co. Rd. 204 (Gold Run Road). 1310 Comment
  JEPS54815  Astragalus purshii L. S. Smith 1916-5-22 Lassen Honey Lake Comment
  CAS-BOT-BC194090  Astragalus purshii var. purshii H. D. Ripley; R. C. Barneby 1943-6-14 5741 Lassen West of Susanville 1310 Comment
  CAS-BOT-BC194094  Astragalus purshii var. purshii Clare B. Hardham 7446 Lassen Diamond Peak 2286 Comment
  RSA0006859  Astragalus purshii var. purshii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1944-5-29 5957 Lassen Susanville 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
  UC82576  Astragalus spaldingii unknown 1892-6-22 Lassen Honey Lake Comment
  UC584308  Astragalus whitneyi G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2275 Lassen sw Diamond Mt. (s of Susanville); sw of Diamond Mt., s of Susanville 2164 Comment
  RSA639008  Astragalus whitneyi Michael A. Vincent 1999-6-9 8576 Lassen Bureau of Land Management land, Madeline Plains: SW of US Rt 395, SE of CR 515 (Termo road), S of BLM road 1614, and SW of Termo. Along jeep road to Schott Canyon. Comment
  SEINET12165119  Astragalus whitneyi N. H. Holmgren, Holmgren, P. K. 1980-1 9514 Lassen Observation Peak, S side of Mt. 18km airline dist. E of Ravendale. T34N R16E S33 Comment
  CHSC68862  Astragalus whitneyi var. confusus Vernon H. Oswald; Lowell Ahart 1997-6-24 8634 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  CAS-BOT-BC200875  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 7 miles below Eagle Lake 1524 Comment
  CAS-BOT-BC200876  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susnaville. Perkin's Ranch 2225 Comment
  NY701852  Astragalus whitneyi var. siskiyouensis H. D. D. Ripley 1943-6-14 5747 Lassen Hidden Valley, east of Susanville 1585 Comment
  NY701856  Astragalus whitneyi var. whitneyi N. H. Holmgren 1980-7-4 9514 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 2190 Comment
  CHSC109990  Atriplex canescens var. canescens L. P. Janeway; B. Castro 2012-7-2 10920 B Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake, 1.5 km north of Wendel, 0.8 km east of the road to Wendel. 1241 Comment
  SEINET515856  Atriplex gmelinii Vernon H. Oswald 1998-9-8 9581 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.) 1259 Comment
  UCD97420  Atriplex hortensis E. K. Balls; P. C. Everett 1952-10-10 18138 Lassen 1.7 miles NE of Standish, Hwy. 395 between Susanville and Alturas. 1249 Comment
  JEPS95903  Atriplex prostrata Lowell Ahart 1999-9-13 8209 Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  CHSC63702  Atriplex rosea Vernon H. Oswald 1994-9-6 6468 Lassen Willow Creek Wildlife Area on Hwy. 139, ca. 10 mi (air) N of Susanville. Common in the parking lot and along the levee road on the N side of the creek. 1490 Comment
  UC1035992  Balsamorhiza Helen K. Sharsmith 1955-6-22 4500 Lassen 5 mi beyond, on road to Likely Bue Lake; Warner Mountains, Modoc National Forest 1767 Comment
  POM35967  Balsamorhiza deltoidea Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC71070  Balsamorhiza hirsuta Vernon H. Oswald; Lowell Ahart 1998-5-22 9089 Lassen Hwy. 36 between Fredonyer Summit and Susanville, 0.4 mi west of the Susan River and Bizz Johnston Trail. 1417 Comment
  RSA584835  Balsamorhiza hirsuta Bruce Bartholomew, M. Gilbert, L. Skog 1993-5-13 6557 Lassen Just S. of Ravendale. 1580 Comment
  UC1794994  Balsamorhiza hookeri R. K. Brummitt 1998-5-17 19897 Lassen 12 km W of Susanville, E foot of Fredonyer Pass 1400 Comment
  UCD159570  Balsamorhiza hookeri D. S. Park 2011-6-27 307 Lassen East of Westwood. Growing near Willard Creek. 1471 Comment
  UCD20370  Balsamorhiza macrolepis Tom Vestal DVM 2002-5-23 s.n. Lassen south of Modoc National Forest Boundary along Little Valley Rd., NNE of Catfish Reservoir. Comment
  CHSC54172  Balsamorhiza macrolepis var. platylepis Vernon H. Oswald 1991-5-28 4622 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  CHSC67422  Balsamorhiza macrolepis var. platylepis James D. Jokerst 1991-5-29 3300 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
  CDA43005  Barbarea orthoceras L. Ahart, John Dittes 2008-6-2 14949 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. Comment
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Oct 5 2019
  JEPS94602  Barbarea orthoceras Vernon H. Oswald and Lowell Ahart 1997-5-27 8501 Lassen on Forest Route 38N04 0.1 mi e Hwy. 139 ((between Hwy 139 near Willow Springs Guard Station and Coyote Flat), n of Susanville) 1546 Comment
  CHSC63703  Bassia hyssopifolia Vernon H. Oswald 1994-9-6 6469 Lassen Willow Creek Wildlife Area on Hwy. 139, ca. 10 mi (air) N of Susanville. Common in the parking lot and along the levee road on the N side of the creek. 1490 Comment
  SEINET3872219  Bassia hyssopifolia Richard R. Halse 2010-8-25 8088 Lassen Along State Hwy. 139 ca 26.2 miles north of Susanville on the northeast shore of Eagle Lake.; 0 1559 Comment
  CAS-BOT-BC145784  Beckmannia syzigachne Peter H. Raven; Otto T. Solbrig 1958-6-17 13262 Lassen United States Highway 395, 2.1 miles northeast of Standish. Comment
  CHSC117278  Beckmannia syzigachne Lowell Ahart; John Dittes 2016-7-15 21216 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
  CHSC63727  Beckmannia syzigachne Vernon H. Oswald 1994-9-6 6471 Lassen Willow Creek Wildlife Area on Hwy. 139, ca. 10 mi (air) N of Susanville. 1490 Comment
  HSC9041  Beckmannia syzigachne Fred Kindel 1955-6-24 Lassen Mt.Meadows Reservoir Comment
  JEPS114766  Beckmannia syzigachne Lowell Ahart, John Dittes 2008-6-20 14946 Lassen In swales, 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
  RSA504677  Betula nana Bruce Bartholomew, B. Anderson 1988-7-22 4500 Lassen Mosquito Creek, 2km SW of Patterson Meadow, southern end of the Warner Mtn. 2080 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
  HSC95177  Bidens cernua Gordon Leppig, Juli Neander, Kai Neander 1997-7-25 678 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC761894  Bidens cernua R. F. Hoover 1940-10-1 4661 Lassen near Honey Lake (between Janesville and Standish) Comment
  HSC42543  Bidens cernua Barbara Kelly 1977-8-9 563 Lassen 15 miles east of Madeline on a dirt road from Adin Comment
  CAS-BOT-BC413003  Bistorta bistortoides John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-13 49225 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC128014  Blepharipappus scaber Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee 1219 Comment
  CAS-BOT-BC128050  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-24 3725 Lassen 5 mi. S. of Likely (Modoc Co.) 1402 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
  SEINET7379326 Image available Blepharipappus scaber J. A. Young 1982-6-7 s.n. Lassen Redlands 1676 Comment
  SEINET7379359 Image available Blepharipappus scaber subsp. scaber J. A. Young 1982-6-9 s.n. Lassen Myers Ranch, Adin 1372 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
  UC1924569  Boechera Debra Valov 2006-5-30 2006041 Lassen Bieber off County Rd A2 c. 12 km east of Hwy 299 1285 Comment
  CAS-BOT-BC16826  Boechera Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16325 Lassen Along southern shore of Eagle Lake. Comment
  CAS-BOT-BC14090  Boechera pauciflora John Thomas Howell; Gordon H. True 1973-8-1 50161 Lassen Sierra Nevada. Diamond Range. Gold Run Creek road south of Susanville. 1584 Comment
  UC10162  Boechera platysperma M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  CHSC101060  Boechera puberula John Dittes 2008-5-22 1532 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 350 feet north by northeast of intersection of Hwy 139 and FS Road 36N02; open, volcanic outcrop on northeast side of Willow Creek. 485 Comment
  CAS-BOT-BC25512  Boechera retrofracta John Thomas Howell; Gordon H. True 1973-7-31 50039 Lassen Sierra Nevada. Diamond Range on road from Janesville to Thompson Peak. 1737 Comment
  CHSC101020  Boechera retrofracta John Dittes 2008-5-22 1533 Lassen Modoc Plateau; ca 15.4 air miles southeast of Adin, ca. 3.6 air miles east of Hayden Hill, ca. 0.2 mile southeast of intersection of Hwy 139 and FS Road 36N02; edge of wooded volcanic toe-slope on northeast side of Willow Creek. 484 Comment
  JEPS118280  Boechera retrofracta Lowell Ahart, John Dittes 2011-6-20 17509 Lassen Graded edge of the Ash Valley Road, 3,120 feet south of Ash Creek Campground, about 6.5 miles (air) southeast of Adin 1511 Comment
  SEINET12627116 Image available Boechera retrofracta Martin Schilling 2013-1 MS 257 Lassen Hat Creek overlook area, off Hwy 44, 2.86 air mi E of Sugarloaf Peak, 5 air mi NE of Hat Creek Hill, on W-facing slope, between rocks 1500 Comment
  CHSC106675  Boechera sparsiflora B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CHSC29908  Boechera sparsiflora Robin Ondricek 1978-6-6 38 Lassen 1.3 mi N of Pine Creek Bridge on Co. Rd. 518. 1554 Comment
  JEPS90262  Boechera sparsiflora Dean Wm. Taylor with Glenn L. Clifton 1992-5-7 12542 Lassen 1.5 mi sw of Ash Valley Cemetery (Modoc Plateau, Ash Valley); Modoc Plateau, Ash Valley Comment
  UC1137672  Boechera sparsiflora L. R. Short 1936-6-1 S- 354 Lassen Burgess Spr. Exp. Range Lassen Forest 1859 Comment
  RSA41170  Boisduvalia glabella Robert F. Hoover 1940-9-21 4602 Lassen 4 miles west of Susanville Comment
  RSA339991  Boisduvalia stricta Noel Holmgren, Patricia K. Holmgren 1980-7-3 9492 Lassen Rye Patch Canyon Road, 3.4 km (2.1 mi) east of US Hwy 395, 14.5 km (9 mi) airline distance southeast of Ravendale. 1700 Comment
  JEPS18771  Brickellia microphylla var. microphylla R. F. Hoover 1940-10-5 4674 Lassen pass between Shaffer Mt. and Warren Peak Shaffer Mt. Comment
  CAS-BOT-BC457056  Brodiaea coronaria subsp. coronaria Ella Dales Cantelow 1940-5-31 3919 Lassen East of McArthur, Hy. 299 Comment
  CAS-BOT-BC149497  Bromus briziformis Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen Few miles north of Leitchfield in lava country. Comment
  CHSC36110  Bromus briziformis George Deniso 1978-7-28 25 Lassen Lower Dry Lakes - SE shore area of Upper lake ca 4.5 km D of Miners Point, Eagle Lake. 1645 Comment
  CHSC36451  Bromus briziformis Susan H. Euing 1982-6-2 5 Lassen Ca. 5 yds n of Ravendale Rd, ca. 3 1/2 mi e of Hwy 139 and Ravendale Rd. Comment
  RSA0065493  Bromus briziformis Marion P. Harthill 1971-6-21 203 Lassen Susanville. Comment
  UCR119112  Bromus carinatus Beecher Crampton 1954-7-5 2055 Lassen Modoc Plateau, 4.5 miles west of Susanville, along state highway 36 1433 Comment
  CAS-BOT-BC149583  Bromus carinatus var. carinatus Parkison 1916-6-21 42 Lassen Near Patterson. 1706 Comment
  CHSC34410  Bromus carinatus var. marginatus Terrence Finn 1979-6-14 1 Lassen 0.75 mi. sw of Hallelujah Junction. 1524 Comment
  HSC22359  Bromus commutatus D. E. Anderson 1969-7-5 4991 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  POM364020  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  UC1037118  Bromus commutatus Leo Whitney 1934-7-22 2249 Lassen 5 mi w of lower end of Eagle Lake (Lassen National Forest, Antelope Mountain); Lassen National Forest, Antelope Mountain 1981 Comment
  UCD58446  Bromus commutatus A. A. Beetle 1941-6-28 2809 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UCD58448  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UCD58467  Bromus commutatus Beecher Crampton 1954-7-5 2056 Lassen Along Hwy. 36. 4.5 miles west of Susanville. Comment
  CHSC5253  Bromus inermis subsp. inermis P. Balch 1955-7-23 Lassen Stafford's Eagle Lake Resort. 1569 Comment
  JEPS97404  Bromus japonicus Vernon H. Oswald and L. Ahart 1995-6-19 6874 Lassen T30N R15E center Sect. 22, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395 1383 Comment
  CAS-BOT-BC161575  Bromus suksdorfii John Thomas Howell; Gordon H. True 1973-8-1 50222 Lassen Sierra Nevada. Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville. 2164 Comment
  CAS-BOT-BC161576  Bromus suksdorfii Clare B. Hardham 1971-8-22 18407 Lassen Diamond Mountain. Comment
  UC1131324  Bromus suksdorfii A. Simontacchi 1940-6-24 891 Lassen 6.4 mi sw of Jacks Lake (Lassen National Forest); Lassen National Forest 1950 Comment
  CAS-BOT-BC161418  Bromus tectorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49520 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  CAS-BOT-BC161420  Bromus tectorum Margaret Williams; Steven Williams 1974-7-26 74 -L-2 Lassen Sierra Nevada. Near Hallelujah Junction, west of Highway 395 and south of Highway 70. 1493 Comment
  CAS-BOT-BC185001  Calamagrostis stricta subsp. inexpansa A. A. Beetle 1941-6-28 2805 Lassen 10 miles west of Chester. Comment
  CHSC99528  Calandrinia ciliata Lowell Ahart; John Dittes 2008-6-22 15030 Lassen On the banks of a small natural drainage, about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  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
  CHSC68744  Callitriche hermaphroditica Vernon H. Oswald; Lowell Ahart 1997-5-27 8514 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy. 139. 1682 Comment
  JEPS124785 Image available Callitriche palustris M. L. Wheelis 1964-7-1 136 Lassen Loc. bridges between Bieber and New Bieber. Comment
  CHSC29951  Callitriche verna Robin L. Ondricek 1978-7-5 94 Lassen At the edge of Mahogany Lake at the ne end. 2057 Comment
  CAS-BOT-BC332740  Callitriche verna R. F. Thorne; Larry E. DeBuhr 1975-8-22 46986 Lassen Along Hwy 395 ca 6 miles N of Medeline and 4.5 miles S of Modoc county line 1615 Comment
  UCD132943  Calocedrus decurrens T. E. Weier; Katrina Weier 1946-9-1 s.n. Lassen Lassen National Park. Comment
  CHSC118825  Calochortus leichtlinii L. P. Janeway; B. Castro 2017-7-2 12339 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
  CHSC6270  Calochortus leichtlinii W. Vinyard 1946-6-17 Lassen Mt. Fredonyer, Eagle Lake. 2133 Comment
  CAS-BOT-BC487963  Calochortus leichtlinii T. S. Brandegee 1892-7-2 s.n. Lassen Susanville Comment
  CAS-BOT-BC487968  Calochortus leichtlinii Marcus E. A M Jones 1897-7-8 s.n. Lassen Lassen's Peak 1828 Comment
  CHSC6271  Calochortus macrocarpus A. Santos 1946-7-5 Lassen East side of Eagle Lake. 1615 Comment
  CAS-BOT-BC483439  Calochortus macrocarpus David D. Keck 1944-7-8 5452 Lassen 1.5 miles west of Susanville, on rim of plateau overlooking Susan River Canyon 1341 Comment
  HSC12524  Calyptridium umbellatum Marcus E. Jones 1897-6-28 Lassen Diamond Mtn., Susanville, Perkin's Ranch 2226 Comment
  UC852120  Calyptridium umbellatum A. A. Heller 1938-6-22 15139 Lassen 1 mi s of Westwood 1524 Comment
  UC1537347  Calyptridium umbellatum Gordon H. True Jr. 1936-6-25 534 Lassen Hall's Valley 1524 Comment
  SEINET230279  Calystegia polymorpha Noel H. Holmgren, Patricia K. Holmgren 1980-7-9 9581 Lassen Surprise Valley 23.7 km south of Fort Bidwell 1400 Comment
  OBI76938  Camelina microcarpa Anthony Baniaga 2011-6-10 321 Lassen Along hwy 395 ca. 6.6 mi S of Karlo Rd quad 1220 Comment
  UC2027336  Camelina microcarpa Anthony Baniaga 2011-6-10 321 Lassen Along Highway 395 ca. 6.6 m S of Karlo Road. quadrangle. Comment
  SBBG70392  Camelina sativa subsp. sativa H. and M. Dearing 1939-6-6 3564 Lassen Bieber Comment
  HSC63958  Camissonia claviformis subsp. cruciformis Teresa Prendusi 1980-5-6 Lassen Honey Lake area Comment
  HSC68913  Camissonia minor Gary Schoolcraft 1980-6-11 265 Lassen W of Wendel 1220 Comment
  RSA294815  Camissonia minor Arnold Tiehm 1980-5-29 5752 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1232 Comment
  HSC81475  Camissonia tanacetifolia Thomas W. Nelson, Jane P. Nelson 1980-7-6 6011 Lassen Along Adin-Madeline Rd., 15 mi. E of Adin in Ash Valley just beyond bridge at baths 1555 Comment
  HSC86885  Camissonia tanacetifolia R. Carter 1967-6-23 547 Lassen Upper part of Murrer's Meadow Comment
  HSC42415  Camissonia tanacetifolia Barbara Kelly 1977-8-9 565 Lassen 14.3 mi. E of Madeline on the dirt road from Adin Comment
  CAS-BOT-BC160863  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell 1934-7-8 12505 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC160879  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell; Gordon H. True 1973-8-1 50209 Lassen Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville 2164 Comment
  CHSC116087  Capsella bursa-pastoris Lowell Ahart; John Dittes 2015-7-13 20308 Lassen About 100 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117199  Capsella bursa-pastoris Lowell Ahart; John Dittes 2016-6-7 20980 Lassen On the west side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC99529  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
  UC10331  Cardamine breweri M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  CHSC61025  Cardamine breweri var. breweri Vernon H. Oswald; Lowell Ahart 1993-8-3 5743 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. At the SW edge of the swamp. 1932 Comment
  UC117814  Cardamine nuttallii var. covilleana Brandegee 1892-7-2 Lassen Susanville Comment
  JEPS120845  Cardamine pensylvanica Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18729 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
  CDA3650  Cardaria draba G. D. Barbe, P. Hiatt, M. Keffer 1980-6-4 2801 Lassen 7.2 miles (11.6 km) north of Termo, 7.1 miles south of Madeline, east side of Madeline Plain. Comment
  SEINET515879  Cardaria pubescens Vernon H. Oswald 1998-9-8 9580 Lassen Ash Creek and Big Swamp 2.2 mi N of Bieber on County road 91 (Bieber-Lookout Rd.). 1259 Comment
  JEPS124368  Carduus nutans Lowell Ahart, John Dittes, Joe DiSalvo 2015-7-14 20322 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UC1137782  Carex August L. Hormay 1934-5-14 Lassen Gray's Flat Well Lassen National Forest 1706 Comment
  SEINET13327167  Carex aquatilis var. aquatilis J. Atchley 1993-5-5 1 Lassen Along willow creek. 1219 Comment
  CHSC89754  Carex athrostachya L. P. Janeway 2004-6-26 8158 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  SD130377  Carex athrostachya John Thomas Howell 1973-7-10 49780 Lassen Sierra Nevada; open Jeffrey pine forest, Fredonyer Pass. 1737 Comment
  HSC95168  Carex cusickii Gordon Leppig, J. Cromwell 1997-7-26 600 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC65136  Carex disperma Vernon H. Oswald; Lowell Ahart 1995-7-24 7145 Lassen High Cascade Range. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. 1905 Comment
  JEPS97368  Carex disperma Vernon H. Oswald and L. Ahart 1995-7-24 7145 Lassen T31N R7E NW1/4 NW1/4 Sec. 24, 6250 ft, High Cascade Range, Red Fir Forest. 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
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Sep 24 2010
  CHSC53521  Carex douglasii L. P. Janeway 1990-7-4 3766 Lassen Bench on east side of saddle ca 0.8 mi northeast of Meadoview Peak. 1981 Comment
  JEPS94477  Carex douglasii Vernon H. Oswald and Lowell Ahart 1997-5-27 8502 Lassen 0.1 mi e of Highway 139 (n of Susanville on Forest Route 38N04 between Highway 139 near Willow Creek Guard Station and Coyote Flat, small creek paralleling road); Forest Route 38N04 1546 Comment
  UC1537637  Carex douglasii Gordon H. True Jr. 1939-6-15 996 Lassen w Grasshopper Lake; Bullard Lake Comment
  SEINET10823343  Carex douglasii Gordon H. True 1939-6-15 True 996 Lassen Bullard Lake west of Grasshopper Valley. Comment
  HSC95229  Carex echinata subsp. echinata Gordon Leppig, Tony LaBanca 1997-6-28 517 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1609197  Carex filifolia var. erostrata Vernon H. Oswald and Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy. 44 (between Poison Lake and Susanville) 1725 Comment
  CAS-BOT-BC20164  Carex filifolia var. erostrata Lassen 1927 G. S. Crew 1927-7-15 60 Lassen Lassen Forest. 1691 Comment
  SEINET7558601 Image available Carex filifolia var. erostrata Richard Driscoll 1965-5-31 s.n. Lassen Lassen. Bogard Ranger Sta., Harvey Valley, NW of Susanvile. 1707 Comment
  CAS-BOT-BC20940  Carex heteroneura George Wilson Gillett 1957-7-21 865 Lassen Below (north of) summit of trail between Juniper Lake and Cameron Meadow. 2118 Comment
  SEINET7587564 Image available Carex heteroneura L. P. Janeway 2003-7-24 7915 A Lassen Swain Mountain 7.5' Quad, High Cascade Range, along Forest Service Road 30N14 1.1 km from Road 30N21. Small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  CHSC61065  Carex heteroneura var. heteroneura Vernon H. Oswald; Lowell Ahart 1993-8-3 5744 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  UC2031875  Carex hoodii Nick Otting and Bruce Newhouse 2003-7-15 705 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 air miles south-southwest of Susanville. Comment
  UC1133501  Carex integra A. Simontacchi 1940-5-14 720 Lassen 4.1 mi wnw Aspen Well; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC31439  Carex leporinella Hans Leschke 1945-9-15 s.n. Lassen Near Twin Lakes, Mt. Lassen Comment
  CHSC65365  Carex limosa Vernon H. Oswald; Beth Corbin, Mike Dolan 1995-8-26 7217 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likeley. 1859 Comment
  UC1136939  Carex mariposana L. R. Short and J. Warren 1936-6-9 S- 405 Lassen Burgess Spr. Exp. Range Lassen Forest 1844 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
  UC2046020  Carex multicostata Nick Otting and Bruce Newhouse 2003-7-15 706 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 air miles south-southwest of Susanville. Comment
  JEPS96118  Carex nebrascensis Vernon H. Oswald and Lowell Ahart 1996-6-24 7882 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. Meadow on the E side of Papoose Creek N of the springs. Comment
  SEINET7568738 Image available Carex nebrascensis L. P. Janeway 2003-7-24 7914 Lassen Pegleg Mountain 7.5' quad. High Cascade Range, at lower end of a meadow and marsh along Bridge Creek, 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  UC2031881  Carex nebrascensis Nick Otting and Danna Lytjen 2003-7-17 693 Lassen Cascade Mountains, Susan River, 1/2 mile NE of Devil's Corral, 5 air miles west of Susanville. Comment
  HSC103619  Carex nebrascensis Thomas W. Nelson, Jane Nelson 1985-8-10 8014 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC119715  Carex nervina Clare B. Hardham 1961-6-17 7508 Lassen Baxter Creek south of Susanville. Comment
  JEPS128406  Carex pellita Catherine Bauer with Ellen Bauer Benson 2017-8-16 14 Lassen South of Highway 44, North of Butte Lake, between Butte Creek and access road into Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  UC2031890  Carex petasata Nick Otting and Danna Lytjen 2003-7-14 675 Lassen Modoc Plateau, Willow Creek at Willow Creek Campground, 14 air miles south-southeast of Adin. Comment
  CHSC108016  Carex praegracilis Lowell Ahart; John Dittes 2011-6-20 17477 Lassen About 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CDA33131  Carex praegracilis T. C. Fuller 1980-8-6 20319 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  SEINET7573104 Image available Carex raynoldsii George W. Gillett 1957-7-29 948 Lassen Lassen Volcanic National Park, along trail between Butte Lake and Snag Lake. 1859 Comment
  HSC95227  Carex simulata Gordon Leppig 1998-7-12 953 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC117017  Carex straminiformis John Thomas Howell; Gordon H. True 1973-8-1 50200 Lassen Ca 3 mi SE of Diamond Mt. East slope of Diamond Range, south of Susanville. Comment
  CHSC85987  Carex subfusca L. P. Janeway 2003-7-24 7915 Lassen High Cascade Range. Along Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  CAS-BOT-BC116608  Carex subfusca Hans Leschke 1959-8-10 1641 Lassen Above Emerald Lake 2438 Comment
  RSA201855  Carex subfusca Jack Major 1966-6-24 s.n. Lassen Above Blue Lake. Warner Mountains. Modoc National Forest. Northeastern Lassen County. (ca. 18 miles airline southeast of likely), California. 1905 Comment
  CAS-BOT-BC115283  Carex utriculata Ray Hanson 1954-8-23 s.n. Lassen Lassen Park, near Jackey Lake. Comment
  HSC103651  Carex utriculata Thomas W. Nelson, Jane Nelson 1985-8-10 8009 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC115062  Carex vesicaria George Wilson Gillett 1957-7-22 879 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. 1850 Comment
  HSC103677  Carex vesicaria Thomas W. Nelson, Jane Nelson 1985-8-10 8029 Lassen Silver Lake, along north side of arm on east side of lake. 1829 Comment
  JEPS63615  Carex whitneyi Leland S. Smith 1922-7-23 75 Lassen Lassen National Forest Comment
  CAS-BOT-BC114884  Carex whitneyi Hans Leschke 1958-8-15 s.n. Lassen Trail Butte-to Snag Lake near Lava beds. 1920 Comment
  CHSC75539  Castilleja angustifolia Vernon H. Oswald; Lowell Ahart 1999-6-9 9746 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. Comment
  CHSC93559  Castilleja angustifolia Lowell Ahart; John Dittes 2005-6-2 11978 Lassen Long Valley, north side of a poor dirt road, about 4 1/2 miles (air) northeast of the interesection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. Comment
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Oct 20 2009
  UC585181  Castilleja angustifolia E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1759 Lassen e of Red Rock (nw side of summit of ridge) 1828 Comment
  CAS-BOT-BC249622  Castilleja applegatei subsp. pinetorum John Thomas Howell 1934-7-9 12527 Lassen Harvey Valley Comment
  CHSC12459  Castilleja applegatei subsp. pinetorum Robert W. Severin 1969-7-6 5 Lassen 1 mile e E.L.B.S. on road to Five Points. Comment
  JEPS17616  Castilleja applegatei subsp. pinetorum Rimo Bacigalupi with G. T. Robbins 1955-7-20 5411 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley); Warner Mountains, Modoc National Forest, Long Valley Meadow 2057 Comment
  UC1035996  Castilleja applegatei subsp. pinetorum Helen K. Sharsmith 1955-6-22 4495 Lassen 5 mi beyond Blue Lake (on the road to Likely); Warner Mountains, Modoc National Forest 1767 Comment
  RSA523923  Castilleja arachnoidea Barbara J. Ertter 1988-7-25 7861 Lassen ridge of Diamond Mts, 1.5 miles E of Diamond Peak, 10 air miles due S of Susanville. 2287 Comment
  UC1137570  Castilleja campestris subsp. campestris A. Simontacchi 1940-6-30 913 Lassen s shore Government Lake; Lassen National Park, Halls Flat Quad. 1524 Comment
  JEPS88512  Castilleja lacera Vernon H. Oswald and Lowell Ahart 1996-6-24 7842 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi ne of Eagle Lake Rd (A1), Papoose Meadows, w side of meadow just s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1567405  Castilleja lacera G. Schoolcraft 1989-6-5 1895 Lassen s of Adin (intersection of Hwy 139 and A2) 1341 Comment
  CAS-BOT-BC226034  Castilleja lacera Ella D. Cantelow 1940-5-31 4439 Lassen E of McArthur Comment
  CHSC1714  Castilleja linariifolia 1944-7-5 Lassen Bogard. 1722 Comment
  CAS-BOT-BC244891  Castilleja miniata anonymous 1927-7-1 40 Lassen Bogard R. S. pasture 1712 Comment
  CHSC5901  Castilleja miniata subsp. miniata R. Gein 1946-6-22 Lassen Webb's Camp, Eagle lake. 1557 Comment
  CHSC12962  Castilleja pilosa K. R. Stern 1974-6-26 5871 Lassen Open sagebrush scrub adjacent to Pine Creek, 3.7 mi n of intersection between County Rd. A-21 to Westwood and Hwy. 44, on e side of Hwy. 44. Comment
  CHSC27743  Castilleja pilosa N. E. Heiken 1978-7-28 68 Lassen E of Eagle L., base of basalt jumble, along Lower Dry L. 1645 Comment
  JEPS114696  Castilleja pilosa Lowell Ahart, John Dittes 2008-6-20 14947 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS22193  Castilleja pilosa Rimo Bacigalupi with S. Galen Smith 1957-6-28 6004 Lassen 5.9 mi s Madeline 1615 Comment
  JEPS3805  Castilleja pilosa G. S. Crew and C. S. Robinson 1927-6-25 35 Lassen near Westwood Jct. (sw Lassen County); Norval Flat 1747 Comment
  JEPS86248  Castilleja pilosa L. R. Heckard and T. I. Chuang 1981-6-10 5529 Lassen about 0.5 mi e Nubieber 1249 Comment
  UC1012185  Castilleja pilosa Francis W. Pennell 1940-6-9 25761 Lassen 5 mi s Ravendale (Route 395) 1645 Comment
  CHSC112415  Castilleja tenuis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18773 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  JEPS74941  Castilleja tenuis T. I. and F. M. Chuang 1975-7-23 7554 Lassen about 2 mi w Westwood (along road to Mountains Meadow Reservoir) Comment
  UC1924576  Castilleja tenuis Debra Valov 2006-5-29 2006027 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UC717969  Castilleja tenuis David D. Keck 1944-6-8 5444 Lassen 2 mi e Westwood (near Mountain Meadows Reservoir) 1524 Comment
  CDA7137  Castilleja tenuis G. Schoolcraft 1993-6-29 s.n. Lassen Ash Valley RNA 16 miles E of Adin, CA Comment
  CAS-BOT-BC52049  Ceanothus prostratus Barbara Shervanick 1974-5-7 1273 Lassen About 2 miles North of Milford on Highway 395, 1 mile Southwest of Honey Lake 1219 Comment
  CAS-BOT-BC52053  Ceanothus prostratus A. A. Heller 1941-6-26 16230 Lassen on the ridge West of Nieubieber 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
  RSA122353  Ceanothus prostratus C. B. Bradshaw 1939-5-27 233 Lassen S end Black Mt. EF Plot 39-1, s15. 1753 Comment
  UC1071528  Ceanothus prostratus Robert W. Gardner 1937-6-14 G- 2 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UC1071529  Ceanothus prostratus A. Simontacchi 1940-5-13 706 Lassen 4.1 mi W of Harvey Mountain 1981 Comment
  UC1071530  Ceanothus prostratus A. Simontacchi 1940-6-5 819 Lassen 8.2 mi WNW of Harvey Valley Ranger Station 1737 Comment
  UC727092  Ceanothus prostratus A. A. Heller 1941-6-26 16230 Lassen on roadside banks on the ridge w Nieubieber; w of Nieubierber 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
  RSA716140  Ceanothus velutinus L. Ahart 2005-6-2 11943 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
  CAS-BOT-BC52439  Ceanothus velutinus var. velutinus Jeanne Janish; Carl Janish 1938-9-4 s.n. Lassen above upper Twin Lake, Lassen National Park 2042 Comment
  JEPS42163  Ceanothus velutinus var. velutinus Brown and Wieslander 1928-6-16 Lassen Eagle Lake Comment
  RSA747546  Ceanothus velutinus var. velutinus K. M. Meyer, A. Townesmith 2007-7-23 153 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  SEINET10690337  Ceanothus velutinus var. velutinus Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 153 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  CHSC113010  Centaurea virgata subsp. squarrosa Lowell Ahart; John Dittes 2013-7-23 18910 Lassen Near the summit on the north side of the Highway 299, at entrance road to quarry site, Big Valley Mountain, just east of Big Valley Summit, 2.8 miles (air) southwest of Nubieber. 1408 Comment
  JEPS30734  Centaurea virgata subsp. squarrosa E. E. Fix 1960-9-21 Lassen Bieber, vic. of Comment
  SEINET13331058 Image available Centaurea virgata subsp. squarrosa T. C. Fuller 1960-7-26 4873 Lassen 4 mi. N. of Bieber, Big Valley Comment
  UCD130125  Centaurea virgata subsp. squarrosa W. T. Parsons; T. C. Fuller 1960-7-26 4873 Lassen 4 miles north of Nubieber, Big Valley. Comment
  SEINET5343603 Image available Centaurea virgata var. squarrosa L. White 1950-8-9 s.n. Lassen Roadside and fields, Cramer Ranch, Big Valley Comment
  SEINET7379749 Image available Centromadia pungens M. J. Williams, G. Smith 1983-1 83- 155 -1 Lassen 5 mi E of Hwy 395 on A-3 which joins the road to Alturas 1372 Comment
  HSC23531  Ceratophyllum demersum R. Carter 1967-7-13 593 Lassen 5 mi. E of Eagle Lake Biology Station at point where road comes nearest to Willow Creek 1561 Comment
  CAS-BOT-BC400182  Ceratophyllum demersum B. Trowbridge 1977-8-9 5986 Lassen Water of Willow Creek near Rice Canyon northeast of Susanville 1524 Comment
  SD51284  Cercocarpus betuloides Darley F. Howe 1961-8-4 Lassen 12 miles east of Mc Arthur on US 299 Comment
  SJSU10513  Cercocarpus ledifolius C. L. Kline 1965-7-12 190 Lassen 8.3 mi E of Susanville on Hwy 139 1341 Comment
  JEPS126476  Cercocarpus ledifolius var. intermontanus Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-26 CA 350 -064 Lassen Take CA 36 W, turn right onto CA 44 W, near Old Station, close to 500 ft off Highway 44. Comment
  CHSC21174  Cercocarpus ledifolius var. ledifolius M. S. Taylor 1974-5-4 226 Lassen Scattered on e side of marsh, ca. 1/2 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  CHSC6241  Cercocarpus ledifolius var. ledifolius W. Vinyard 1946-6-17 Lassen Specimen with flowers from summit Mt. Fredonyer. 2421 Comment
  CAS-BOT-BC276618  Chaenactis douglasii var. douglasii John Thomas Howell 1934-7-8 12497 Lassen Spalding's Eagle Lake Comment
  CHSC4432  Chaenactis douglasii var. douglasii K. R. Stern 1967-7-1 2457 Lassen Ca. 14 mi. NE of Susanville. State Hwy. 139. Comment
  CAS-BOT-BC276613  Chaenactis douglasii var. douglasii David D. Keck; J. Clausen 1935-6-25 3755 Lassen Susanville, just W of town 1300 Comment
  UC1777700  Chaenactis douglasii var. douglasii Donald W. Kyhos 1967-9-1 67 -88 Lassen Mt. Lassen National Park. Area within 1/2 mile north of Hat Lake. Pumice slopes Comment
  SEINET7450277 Image available Chaenactis nevadensis D. W. Kyhos 1967-9-1 67 -87 Lassen Within 1/2 mile north of Hat Lake Comment
  UCD19699  Chaenactis nevadensis Donald W. Kyhos 1967-9-1 67 -87 Lassen Mount Lassen National Park, in the devastated area within 1/2 mile north of Hat Lake. Comment
  CHSC19727  Chamaebatiaria millefolium Mary E. Meyer 1973-7-7 14 Lassen Located west of ELBS water tower. Comment
  NY758641  Chamaebatiaria millefolium L. Ganio 1981-7-8 29 Lassen Tule Mountain 2073 Comment
  CHSC21229  Chamaesaracha nana Robert A. Schlising 1974-6-20 3145 Lassen Near Lower Dry Lake, about 3 mi E of Eagle Lake. Comment
  UC1523765  Chamaesaracha nana Gary Schoolcraft 1981-7-1 493 Lassen e slopes Roop Mountain 2133 Comment
  CHSC113085  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Dittes 2013-7-22 18857 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC60898  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1993-7-8 5660 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Between the railroad and the lake. 1709 Comment
  JEPS88232  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1996-6-17 7771 Lassen 7 mi W of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off N side of Hwy 36 ca. 0.2 mi E of the 7 mi post); Modoc Plateau 1432 Comment
  RSA0105580  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart, John Dittes 2013-7-22 18857 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
  SJSU10817  Chamaesyce serpyllifolia C. L. Kline 1965-7-12 190 Lassen 8.3 mi NE of Susanville by Hwy 139 1036 Comment
  HSC991  Cheilanthes gracillima H. E. Parks, S. T. Parks Jun 1928 262 Lassen Mt. Lassen National Park, Drakesbad 2134 Comment
  RSA756354  Chenopodium Barbara Ertter 1987-7-24 7301 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  UC1949078  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen ca 3/4 mi ENE of Beckwourth Pass Comment
  POM312487  Chenopodium berlandieri var. zschackei Irving Schneider 1947-8-1 8229 Lassen Irrigation ditch running SW into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
  RSA233736  Chenopodium botrys R. F. Thorne, C. W. Tilforth 1969-9-6 39259 Lassen along Long Valley Creek, c. 14 mi. SE of Milford. 1311 Comment
  UC1191324  Chenopodium chenopodioides Verne Grant and Irving Schneider 1947-9-5 8368 Lassen by Sam Webb's place (Spaulding) (nw shore of lake); Eagle Lake Comment
  UC1745664  Chenopodium chenopodioides Annetta M. Carter 1945-9-30 1726 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  UC1746002  Chenopodium desiccatum Annetta M. Carter 1945-9-30 1721 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
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Jul 20 2019
  CHSC76095  Chenopodium rubrum var. humile Lowell Ahart; Vernon H. Oswald 1999-9-13 8215 Lassen In a dry field, about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  JEPS95912  Chenopodium rubrum var. humile Lowell Ahart 1999-9-13 8215 Lassen about 150 yards southwest of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  CHSC6235  Chimaphila menziesii P. Balch 1955-7-22 Lassen Eagle Lake. Between Eagle Lake and Pittville road. 1676 Comment
  CAS-BOT-BC451357  Chimaphila menziesii Louella Bass 1978-6-15 78 -3 Lassen Elysian Valley 1325 Comment
  UCD149985  Chorispora tenella William Anderson 1963-5-7 s.n. Lassen Milford. Comment
  UCSB62935  Chrysolepis sempervirens Sarr, Dan 1995-7-31 Lassen within crater of Crater Mountain 670 Comment
  RSA755658  Chrysopsis villosa var. hispida Barbara Ertter 1987-7-24 7302 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  CDA36350  Chrysothamnus nauseosus B. Villegas 2011-8-25 Lassen Highway 395 just above Doyle. 0 Comment
  CDA10774  Chrysothamnus nauseosus subsp. albicaulis M. R. Pryor 1953-9-22 Lassen Stacey. 0 Comment
  RSA79230  Chrysothamnus nauseosus subsp. albicaulis E. K. Balls, Percy C. Everett 1952-10-10 18135 Lassen 4 miles east of Susan River Bridge, Hwy. 36 1372 Comment
  SEINET3392549  Chrysothamnus nauseosus subsp. hololeucus E. D. McArthur 1982-1 EDM- 1358 Lassen NW of Janesville @ jct of CO ros 205 & 219 Comment
  CAS-BOT-BC105907  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 2396 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  JEPS21415  Chrysothamnus viscidiflorus subsp. viscidiflorus R. F. Hoover 1940-10-5 4664 Lassen Wendel Comment
  OBI5967  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 2396 Lassen Big Valley, 2.6 mi from Bieber on the road to Alturas 1268 Comment
  UC1776665  Chrysothamnus viscidiflorus subsp. viscidiflorus G. Schoolcraft 1994-9-13 2430 Lassen Just above gate along road to Fredonyer Pk. lookout 2255 Comment
  CHSC64794  Chylismia claviformis subsp. cruciformis Vernon H. Oswald 1995-5-24 6759 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. At the base of the Amedee Mtns. 1280 Comment
  POM352119  Cichorium intybus George Willet 1935-6-28 s.n. Lassen Susanville Comment
  CAS-BOT-BC184829  Cinna latifolia John Thomas Howell; Gordon H. True 1973-8-1 50246 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1950 Comment
  UC1037245  Cirsium andersonii Leo Whitney 1933-8-8 1994 Lassen near Poison lake, ca 23 m w (of Eagle Lake) Eagle Lake; Poison Lake 1828 Comment
  UC1483859  Cirsium andersonii G. Schoolcraft 1980-8-13 354 Lassen n side Diamond Mt. Comment
  UCD159575  Cirsium arvense D. S. Park 2011-6-27 311 -2 Lassen East of Westwood. Growing near Willard Creek. Comment
  CAS-BOT-BC284384  Cirsium arvense John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49418 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 Comment
  CAS-BOT-BC277934  Cirsium canovirens T. C. Fuller 1959-7-7 2739 Lassen Hwy. 395 6 miles/north/road to Karlo Comment
  CAS-BOT-BC278008  Cirsium cymosum Alice Eastwood; John Thomas Howell 1940-6-15 8307 Lassen Willow Creek near Hayden Hill Comment
  CAS-BOT-BC278003  Cirsium cymosum Mrs. H. C. Cantelow 1940-5-31 s.n. Lassen 5 miles east of McArthur, Hy. 299 Comment
  JEPS30608  Cirsium douglasii var. breweri Peter H. Raven and Otto T. Solbrig 1958-6-17 13280 Lassen 13.1 mi s Ravendale (along U.S. Highway 395) Comment
  CAS-BOT-BC278092  Cirsium douglasii var. breweri Peter H. Raven; Otto T. Solbrig 1958-6-17 13280 Lassen Along United States Highway 395, 13.1 miles south of Ravendale Comment
  CAS-BOT-BC280058  Cirsium neomexicanum T. C. Fuller 1980-8-5 20312 Lassen 0.4 km. east of the campground, east shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  SEINET3082769 Image available Cirsium occidentale var. candidissimum N. H. Holmgren, John J. Fay & Barton L. Bethers 1970-6-25 4377 Lassen North end of Petersen Mountain, near US 395, 8 miles north of junctin with Calif. 70 (Hallelujah Junction). 1524 Comment
  UCD170227  Cirsium occidentale var. candidissimum K. M. Meyer; A. Townesmith 2007-7-21 143 Lassen Lassen National Forest. 1.3 miles on road 110, off Highway A21. Mixed Pine and populus forest. Near Susan River. 1821 Comment
  CDA1527  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14982 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CAS-BOT-BC280424  Cirsium ochrocentrum Lee E. Wheeler 1959-7-23 s.n. Lassen M. A. Mallory prop. Richmond Rd., ca. 4 mi SE/Susanville Comment
  CDA32840  Cirsium ochrocentrum CDFA Staff 1985-6-3 Lassen Madelaine Plains 0 Comment
  CDA1524  Cirsium ochrocentrum var. ochrocentrum D. Chambers, M. Carstens 1979-8-14 s.n. Lassen Modoc National Forest Upper Windmill Flat and Packwood Reservoir; 12 mi. S of Adin. 0 Comment
  CAS-BOT-BC286308  Cirsium scariosum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49427 Lassen Elysian Valley, west of Janesville 1325 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
  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-BC123818  Clarkia lassenensis Alice Eastwood; John Thomas Howell 1940-6-11 7983 Lassen Big Valley Mts. Comment
  POM260406  Clarkia lassenensis C. L. Hitchcock 1940-5-26 6610 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CAS-BOT-BC172562  Clarkia purpurea subsp. purpurea John Thomas Howell 1974-7-10 50550 Lassen Elysian Valley, Sierra Nevada 1325 Comment
  JEPS90014  Clarkia purpurea subsp. quadrivulnera Dean Wm. Taylor with Robert A. Price 1988-6-4 9770 Lassen 6 mi e of MacArthur (Fall River Valley along Highway 299 at crossing of Frazer Creek, Pit River Watershed); Fall River Valley, Highway 299 1036 Comment
  CAS-BOT-BC164869  Clarkia rhomboidea Clare B. Hardham 1961-6-16 7447 Lassen S. of Susanville Comment
  UC1587045  Clarkia rhomboidea G. Schoolcraft 1991-7-30 2194 Lassen e side Widow Mountain 1889 Comment
  CHSC80231  Clarkia stellata Jeanne Boze 1981-6-12 108 Lassen On hillside along road to 5 corners about 3 mi from Eagle Lake Field Station. 1706 Comment
  RSA0080500  Claytonia lanceolata M. S. Baker 1952-5-23 12429 Lassen Hwy. 36; 0.5 mi. West of Predonyer Pass. 1753 Comment
  CHSC80559  Claytonia rubra subsp. depressa Vernon H. Oswald 2001-5-4 9998 Lassen Ash Creek Wildlife Area, Wayman Barn at the west end of Hunt Rd. 1267 Comment
  CHSC23524  Claytonia rubra subsp. rubra Wayne O. Baum 1971-7-17 71 -82 Lassen S. slope of Gallatin Peak. 2042 Comment
  UC1393119  Cleome platycarpa John L. Strother 1970-5-23 951 Lassen about 6 mi n Honey Lake 1280 Comment
  SEINET8584734  Cleomella hillmanii var. hillmanii W. Harnach 2010-6-1 1241 Lassen Approx 10 miles NE of Doyle on Fort Sage Road then 1.9 miles N on Cal-Neva Road. Honey Lake Valley. Comment
  RSA93741B  Cleomella plocasperma Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CHSC71101  Collinsia parviflora Vernon H. Oswald; Lowell Ahart 1998-5-22 9126 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  HSC97103  Collinsia parviflora L. Ahart 2005-6-1 11858 Lassen 1/2 mile west of Scott Rd., Long Valley, about 2 air miles NW of the intersection of Scott Rd. and Hwy. 70. 3.9 air miles NW of Hallelujah Junction 1449 Comment
  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
  JEPS17613  Collinsia parviflora Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5406 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley Meadows, s end of Warner Mtns); Warner Mts., Modoc National Forest, Long Valley Meadows 2057 Comment
  NY963534  Collomia grandiflora N. H. Holmgren 1980-7-4 9502 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 1890 Comment
  POM146293  Collomia grandiflora J. B. Feudge 1740 Lassen Bank of Susan River. Susanville Comment
  RSA712891  Collomia tinctoria L. P. Janeway 2005-6-3 8450 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. Comment
  UC1609177  Collomia tinctoria Vernon H. Oswald and Lowell Ahart 1993-6-28 5597 Lassen Harvey Valley Rd. (33N02) 2.0 mi n Hwy 44 (between Grays Valley and Harvey Valley, e of Poison Lake) 1734 Comment
  JEPS121290  Conium maculatum Lowell Ahart, John Dittes 2013-7-23 18901 Lassen W side of the road levee, about 80 yards W of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  POM33286  Conyza canadensis Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  POM107536  Corallorhiza maculata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  JEPS17408  Cordylanthus kingii subsp. helleri Rimo Bacigalupi with G. T. Robbins 1955-7-21 5427 Lassen s Smoke Creek Ranch Rd. (1.3 mi w of Nevada Line, 17.5 mi e of US Hwy 395); draingage of Rush Creek 1341 Comment
  JEPS17409  Cordylanthus kingii subsp. helleri Rimo Bacigalupi with G. T. Robbins 1955-7-21 5427 Lassen s Smoke Creek Ranch Rd. (1.3 m <e?> of Nevada line, 17.5 m w of US Hwy 395); drainage of Rush Creek Comment
  JEPS57534  Cordylanthus maritimus subsp. canescens Harry George 1963-8-15 Lassen shores of Honey Lake Comment
  JEPS95913  Cordylanthus maritimus subsp. canescens Lowell Ahart 1999-9-13 8218 Lassen about 150 yards southwest of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  POM43083  Cordylanthus tenuis subsp. tenuis Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  CAS-BOT-BC212206  Cornus sericea Philip A. Munz 1947-5-20 11887 Lassen Laufman Forestry Public Camp Ground above Milford 1524 Comment
  CHSC93564  Crepis acuminata Lowell Ahart; John Dittes 2005-6-2 11933 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  UC1136839  Crepis acuminata George A. Fischer and Irwin H. Johnson 1933-7-14 F- 266 Lassen Lassen <National> Forest 1752 Comment
  UC1136840  Crepis acuminata L. R. Short 1936-7-9 S- 509 Lassen Burgess Spr. Exp. Range Lassen National Forest 1818 Comment
  POM260004  Crepis acuminata C. L. Hitchcock 1940-5-26 6621 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  OBI75880  Crepis bakeri Anthony Baniaga 2011-6-30 404 Lassen Lassen Natl Forest. E of 29N03. Fredonyer Pass quad. T29N R10E sec 24 NW of NE 1470 Comment
  JEPS87521  Crepis modocensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5614 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  POM230914  Crepis monticola G. Ledyard Stebbins, J. A. Jenkins 1937-7-6 2193 Lassen Susanville, just west of the town, on 'Inspiration Point' Comment
  UC30521  Crepis occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3406 Lassen Chat Honey Lake Valley Comment
  UC581195  Crepis occidentalis E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1749 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  SEINET7838833 Image available Crepis occidentalis N. H. Holmgren, P. K. Holmgren 1978-6-11 8929 Lassen Upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-south of Ravendale. 1707 Comment
  CAS-BOT-BC290742  Crepis occidentalis subsp. costata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2320 Lassen Black Mountain about a mile below the summit 1940 Comment
  CAS-BOT-BC376565  Crepis occidentalis subsp. occidentalis B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6566 Lassen U.S. Hwy 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield 1330 Comment
  CAS-BOT-BC376460  Crepis occidentalis subsp. pumila James Jokerst 1983-7-23 1868 Lassen Near Madeline Plains 1614 Comment
  SEINET3158253  Cressa cretica M. E. Jones 1897-6-23 sn Lassen Amedee 1219 Comment
  CHSC71895  Crypsis schoenoides Vernon H. Oswald; Lowell Ahart 1998-9-8 9577 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. Near the highway. 1255 Comment
  UCD54541  Crypsis schoenoides Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2725 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1246 Comment
  HSC63831  Crypsis vaginiflora Teresa Prendusi 1980-8-27 Lassen Reservoir just NE of Susanville 1280 Comment
  UCD59992  Crypsis vaginiflora P. B. Kennedy 1915-9-1 s. n. Lassen Bieber. Comment
  SDSU20524  Cryptantha ambigua Nuri Benet-Pierce, John P. Pierce 2012-7-14 524 Lassen Between Poison Lake and Patterson Flats, in clearing by the rd, at the start to 35N08. 1724 Comment
  CHSC106681  Cryptantha circumscissa B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CHSC60275  Cryptantha circumscissa P. V. Caldwell 1972-6-16 226 Lassen Eagle Lake. Base of w slope of Blk. Mtn. 1554 Comment
  HSC31746  Cryptantha circumscissa Donald Spalinger 1974-5-16 62 Lassen 300 yds. S of intersection of Rd. A3 and H 395 1250 Comment
  UCD55276  Cryptantha circumscissa Ellen Dean 2006-5-15 3091 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1245 Comment
  POM73232  Cryptantha hendersonii Marcus E. Jones 1897-6-26 6900 Lassen Susanville, Perkin s Ranch. 1463 Comment
  CHSC75468  Cryptantha humilis Vernon H. Oswald; Lowell Ahart 1999-6-19 9743 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  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
  CDA40508  Cryptantha muricata Gary Schoolcraft 2000-6-19 2903 Lassen West of Cold Spring Velley. Comment
  UC526165  Cryptantha pterocarya John Thomas Howell 1934-6-10 11851 Lassen 4 mi s Omira Comment
  POM72225  Cryptantha torreyana Marcus E. Jones 1897-6-25 7103 Lassen Susanville. 1341 Comment
  UC402818  Cryptantha torreyana Milo S. Baker Jul 1912 Lassen Pine Creek Comment
  UCD126237  Cuscuta approximata Lee Smith 1975-9-4 s.n. Lassen Al Blickenstaff Farm, near Honey Lake, 3 miles south of Janesville. 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
  UC22937  Cycladenia humilis var. humilis Milo S. Baker 1894-7-30 Lassen Silver Lake Comment
  UC1587038  Cynoglossum occidentale G. Schoolcraft 1991-7-30 2192 Lassen Bear <Sring> on n. side of widow Mt. 1780 Comment
  UC1037350  Cystopteris fragilis Leo Whitney 1935-5-26 3142 Lassen 10 mi e Adin (lava bluff at Ash Creek) Comment
  NY703182  Dalea ornata A. Tiehm 1984-6-7 8592 Lassen Flats on the northwest side of Shaffe Mountain, 7.5 air miles north-northwest of Litchfield 1372 Comment
  JEPS32210  Damasonium californicum Jos. Grinnell 1928-6-26 Lassen Poison Lake Lassen Peak Region, Poison Lake 1737 Comment
  UC1130605  Damasonium californicum Robert W. Gardner 1937-6-26 G- 25 Lassen Poison Lake Halls Flat Quad., Poison Lake Comment
  CHSC60866  Danthonia unispicata Vernon H. Oswald; Lowell Ahart 1993-6-28 5579 Lassen Harvey Valley Rd. (33N02), 0.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1749 Comment
  UC1024799  Danthonia unispicata Leo Whitney 1935-6-24 3298 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  JEPS79213  Delphinium L. R. Heckard with R. C. Bacigalupi 1980-6-12 5254 Lassen ne Westwood (near golf course) 1554 Comment
  CAS-BOT-BC1416  Delphinium andersonii L. B. Barlow 1967-6-23 1 Lassen Eagle Lake Biological Station, east central side of Eagle Lake 1554 Comment
  CHSC67595  Delphinium andersonii James D. Jokerst 1983-5-30 1794 Lassen Ca. 1.5 mi N of Eagle Lake, ca. 50 m W of Hwy. 139, ca. 1.0 mi N of Eagle Lake Rd. Comment
  CHSC68759  Delphinium andersonii Vernon H. Oswald; Lowell Ahart 1997-5-27 8511 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.3 mi east of Hwy. 139. On the south side of the road. 1560 Comment
  UC726248  Delphinium andersonii A. A. Heller 1938-6-23 15217 Lassen flat along US Hwy 395 between Termo and Madeline 1524 Comment
  SEINET5337963  Delphinium andersonii F. B. Headley Unknown s.n. Lassen Honeylake, Calif. Comment
  CHSC60846  Delphinium depauperatum Vernon H. Oswald; Lowell Ahart 1993-6-28 5601 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. In a meadow. 1725 Comment
  HSC79826  Delphinium depauperatum William Rothstrom 1975-6-9 Lassen Near Day, 1.0 mi. E of large cinder pit mine 1280 Comment
  CHSC36497  Delphinium nudicaule Theresa Costa 1982-6-3 29 Lassen Ca. .3 mi s jct forest service rds 5.16 and 5.17, ca. 5 yd w 5.16, heading toward 5-corners. Comment
  CAS-BOT-BC9943  Delphinium nudicaule H. D. Ripley; R. C. Barneby 1943-6-14 5128 Lassen Fredonyer Pass 1706 Comment
  CAS-BOT-BC9945  Delphinium nudicaule Mrs. H. C. Cantelow 1941-5-22 N. S. Lassen Fredonyer Pass, 12 miles west of Susanville. Comment
  CAS-BOT-BC116054  Delphinium nuttallianum Elmer Ivan Applegate 1929-6-21 5780 Lassen Kelley's Camp, Warner Valley, Mt. Lassen region Comment
  UC773881  Delphinium nuttallianum L. R. Short 1936-5-12 S- 347 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1834 Comment
  CAS-BOT-BC116050  Delphinium nuttallianum Mrs. E. C. Sutliffe 1957-7-21 863 Lassen Drakesbad, Lassen Volcanic Park Comment
  UC1142937  Deschampsia cespitosa A. L. Hormay 1941-6-23 16 Lassen Burgess Spring 1676 Comment
  JEPS28061  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-7-22 876 Lassen 100 yds. above lake near s. shore Snag Lake; Lassen Volcanic Nat'l Park, Snag Lake 1850 Comment
  UC1037093  Deschampsia cespitosa subsp. cespitosa Leo Whitney 1934-7-15 2211 Lassen ca. 15 mi. w. Eagle lake (Crater Lake, Lassen Nat'l Forest); Lassen Nat'l Forest, Crater Lake 2133 Comment
  UC1024884  Deschampsia danthonioides Leo Whitney 1935-5-26 3137 Lassen 10 mi. e. Adin (Ash Creek); Ash Creek Comment
  UC1100291  Deschampsia danthonioides Malcolm A. Nobs and S. Galen Smith 1949-7-21 1059 Lassen 4 mi. n. Madeline Comment
  UC188945  Deschampsia danthonioides Milo S. Baker 1900-7-5 Lassen Dixie Valley Comment
  UCD62833  Deschampsia danthonioides Malcolm A. Nobs; S. Galen Smith 1949-7-21 1059 Lassen 4 miles N of Madeline. Comment
  UC53606  Deschampsia elongata M. S. Baker and Frank Nutting 1894-7-5 Lassen Davis Creek Comment
  CAS-BOT-BC201808  Deschampsia elongata Malcom A. Nobs; S. Galen Smith 1949-7-21 1058 Lassen 4 miles north of Madeline Comment
  UC1609092  Descurainia incisa subsp. filipes Vernon H. Oswald and Lowell Ahart 1993-7-8 5656 Lassen ne edge Poison Lake (1.9 mi n of Hwy 44, Pittville Rd (Lassen 111, 36N01), ridge between railroad and lake) 1709 Comment
  JEPS108556  Descurainia pinnata subsp. halictorum L. P. Janeway 2005-7-4 8466 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  CAS-BOT-BC43485  Descurainia sophia Al Simontacchi 1940-6-8 828 Lassen Lassen Forest. Halls Flat Ranger Station. 1706 Comment
  CHSC57356  Descurainia sophia B. G. Clark 1987-4-15 22 Lassen Lassen or Inyo counties. Top of knoll 1/4 mi sw of Lassen College adjacent and west of hwy 139. Comment
  RSA0035397  Descurainia sophia Lowell Ahart, John Dittes 2008-6-20 14912 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1776704  Descurainia sophia G. Schoolcraft 1993-5-25 2268 Lassen N and S of Smoke Creek road 1463 Comment
  CHSC7664  Dichelostemma multiflorum Beverley J. Wise 1969-6-1 141 Lassen 2 mi. north of Susanville on Hwy 139. 1341 Comment
  CAS-BOT-BC500987  Dichelostemma multiflorum Alice Eastwood; John Thomas Howell 1940-6-11 7971 Lassen Big Valley Mts. Comment
  UCD21046  Dieteria canescens E. Bortiri 2002-7-19 WFC 82 Lassen Poison Lake, in pine forest on side of road, Lassen NF, off Hwy 44 Comment
  JEPS30487  Dieteria canescens var. shastensis Peter H. Raven with Otto T. Solbrig 1958-6-15 13244 Lassen 5.7 mi w Westwood (on State Highway 36) Comment
  JEPS87533  Dieteria canescens var. shastensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5596 Lassen Harvey Valley Rd. (33N02) 2.0 mi n Hwy 44 (between Grays Valley and Harvey Valley, e of Poison Lake) 1734 Comment
  UC1119608  Dieteria canescens var. shastensis H. S. Yates 1936-8-11 6077 Lassen near Johnstonville; Susanville Quad. Comment
  UC1609238  Dieteria canescens var. shastensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5596 Lassen Harvey Valley Rd. (33N02) 2.0 mi n Hwy 44 (between Grays Valley and Harvey Valley, e of Poison Lake) 1734 Comment
  CAS-BOT-BC153632  Diplacus jepsonii Lassen 1927 G. S. Crew 1927-6-25 23 Lassen Norval Flat, Lassen National Forest 1747 Comment
  CAS-BOT-BC153681  Diplacus mephiticus L. G. Bennett 1967-6-23 21 Lassen Eagle Lake Biological Station Grounds 1554 Comment
  CHSC4812  Diplacus mephiticus R. Carter 1967-7-7 577 Lassen Collected outside dining hall, n side, 15 yds from building. 1524 Comment
  SEINET201637 Image available Diplacus mephiticus Arthur Cronquist, Arthur H. Holmgren 1959-1 8464 Lassen 50 mi SE of Susanville Comment
  JEPS123846  Distichlis spicata Lowell Ahart, John Dittes 2015-7-14 20333 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  RSA647540  Distichlis spicata Marion P. Harthill 1972-6-17 798 Lassen Standish. Comment
  SBBG115909  Distichlis spicata J. T. Howell 1973-7-10 49764 Lassen near Westwood 1554 Comment
  CAS-BOT-BC136179  Dodecatheon alpinum Wayne Roderick 1969-6-14 s.n. Lassen Creek above Blue Lake 1524 Comment
  CHSC7735  Dodecatheon alpinum Beverley J. Wise 1969-4-20 82 Lassen 14.7 mi. north of Susanville on Hwy 139. 1463 Comment
  UC559941  Dodecatheon conjugens Leo Whitney 1935-6-10 3211 Lassen Camp 10 Fruit Growers Supply Company Camp 10, Fruit Growers Supply Company Comment
  SEINET8561548  Dodecatheon conjugens M. J. Williams 1969-5-24 s.n. Lassen Ca 0.5 mile N of Bogart Ranger Station. 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
  UCR227662  Downingia R. F. Thorne, Larry E. DeBuhr 1975-8-22 47207 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
  CHSC60886  Downingia bacigalupii Vernon H. Owald; Lowell Ahart 1993-7-8 5677 Lassen N. side of 34N12 just E of the railroad at Halls Flat Well, ca. 11 mi (air) NNW of Poison Lake. 1737 Comment
  JEPS108700  Downingia bacigalupii H. Chappel, J. Goldhammer, K. Moran 2002-7-9 ALT- 18 Lassen Muck Valley 1386 Comment
  RSA436116  Downingia bacigalupii Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  UC1229824  Downingia bacigalupii John Weiler 1959-4-22 59203 Lassen 11.1 mi se Eagle Lake (along county highway A-1) Comment
  UCD33603  Downingia bacigalupii Beecher Crampton 1970-6-26 8637 a Lassen Lassen County, ca. 5 miles west of Susanville. 1524 Comment
  CAS-BOT-BC492927  Downingia bacigalupii Louis K. Mann; M. Pat Mann 1963-6-18 s.n. Lassen On State Hwy 139 from Susanville to Adin, 42 mi N of Susanville. Comment
  UCD23274  Downingia bacigalupii Louis K. Mann, Pat Mann 1963-6-18 s.n. Lassen Road cut through sagebrush flat. 13 miles north of Susanville on road to Merrillville. Comment
  UC1609096  Downingia cuspidata Vernon H. Oswald and Lowell Ahart 1993-7-8 5647 Lassen 0.4 mi n Hwy. 44 (Pittville Rd (Lassen 111, 36N01) near its intersection with 33N11, near se end of Poison Lake) 1709 Comment
  UCD58787  Downingia elegans Daniel B. Marcum 2007-7-25 s.n. Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  RSA128294  Downingia insignis P. H. Raven, Otto T. Solbrig 1958-6-17 13282 Lassen Along U.S. Hwy 395, 1.9 miles S of Ravendale. Comment
  UC1520663  Downingia insignis Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9482 Lassen 4.6 mi s Ravendale (U.S. Highway 395) 1615 Comment
  UC614648  Downingia insignis L. Constance 1938-6-11 2328 Lassen Litchfield, overflow of the Susan River Susan River 1219 Comment
  UCD55103  Downingia insignis Gerald Dickinson 1963-7-3 72 Lassen U.S. Highway 299; 1 mile west of Bierber. 1249 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
  SEINET12329647  Downingia insignis N. H. Holmgren, Holmgren, P. K. 1980-1 9482 Lassen U.S. Highway 395, 7.4 km (4.6 mi.) S of Ravendale, T33N, R15E, S6 1620 Comment
  SJSU3581  Downingia insignis P. L. Billings 1965-7-13 76 Lassen near Nubieber 1274 Comment
  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
  RSA39757  Downingia laeta P. A. Munz 1947-5-20 11892 Lassen Milford 1265 Comment
  CAS-BOT-BC42077  Draba aureola Eben McMillan 1968-6-28 140 -1 Lassen South slope of Mount Lassen. Comment
  UC1951080  Draba verna Debra Valov 2009-4-24 2009011 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC71081  Draba verna var. verna Vernon H. Oswald; Lowell Ahart 1998-5-22 9128 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. Along a streamlet. 1463 Comment
  HSC95149  Drosera anglica Gordon Leppig, J. Cromwell 1997-7-27 609 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  JEPS97330  Drosera anglica Vernon H. Oswald 1995-8-21 7216 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Marsh in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  CAS-BOT-BC527338  Drymocallis glandulosa var. reflexa John Thomas Howell 1977-6-22 52405 Lassen West of Susanville near the confluence of Willard Creek and Susan River, Sierra Nevada 1432 Comment
  UC1143045  Drymocallis lactea L. R. Short and J. Warren 1936-6-10 S- 425 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1853 Comment
  CAS-BOT-BC159382  Drymocallis lactea var. austiniae Clare B. Hardham 1971-8-22 18387 Lassen Diamond Mountain 2346 Comment
  HSC31371  Dysphania pumilio D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19292 Lassen Along Hwy. 395 about 4 mi. E of Standish 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
  CHSC116198  Elatine californica Lowell Ahart; John Dittes 2015-7-13 20300 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
  HSC7304  Eleocharis acicularis Fred J. Kindel 1955-6-15 Lassen Mt. Meadows Reservoir, Westwood Comment
  CHSC117180  Eleocharis bella Lowell Ahart; John Dittes 2016-6-7 21015 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC60862  Eleocharis bella Vernon H. Oswald; Lowell Ahart 1993-6-28 5599 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  CHSC66272  Eleocharis bella Vernon H. Oswald 1996-6-24 7851 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. On the W side of the meadow just S of the cabins. 1633 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
  RSA0009565  Eleocharis bolanderi Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  CHSC110893  Eleocharis macrostachya Lowell Ahart; John Dittes 2012-7-9 18293 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
  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
  CAS-BOT-BC112848  Eleocharis macrostachya R. K. Gierisch 1968-7-12 3359 Lassen Hwy 36, 1 mi E of Fredonyer Pass. 1706 Comment
  JEPS127217  Eleocharis palustris Lowell Ahart, John Dittes 2016-7-15 21215 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  RSA127038  Eleocharis quinqueflora Robert W. Gardner 1939-6-15 G- 36 Lassen Little Harvey Valley 1700 Comment
  CAS-BOT-BC197349  Elymus Melissa A. Berry 1957-6-30 s.n. Lassen Highway 395 1280 Comment
  POM112303  Elymus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  SEINET10565243  Elymus Paul Gallian, David B. Dunn 1971-6-2 Gallian 512 Lassen 6 mi of Hallelujah Jct. on US hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  UC1031373  Elymus X saundersii Leo Whitney 1935-7-31 3588 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC506940  Elymus X saundersii George A. Fischer and Irwin H. Johnson 1933-7-12 F 233 Lassen Patterson Flat Lassn <National> Forest 1737 Comment
  CHSC111247  Elymus cinereus B. Castro; L. P. Janeway 2012-7-2 1937 Lassen Modoc Plateau. 32 air mi due E of Susanville, 12 mi E of Hwy 395 and 3 mi W of the NV border. East side of Skedaddle Mountains; corral at 'Skedaddle Ranch. 1577 Comment
  CAS-BOT-BC227483  Elymus elymoides Margaret Williams; Steven Williams 1974-7-26 74 -L-42 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  JEPS128414  Elymus elymoides Catherine Bauer with Ellen Bauer Benson 2017-8-16 20 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  RSA152628  Elymus elymoides I. L. Wiggins, Dorothy Wiggins 1961-6-11 16343 Lassen 13.5 mi. E. of Susanville Comment
  UCD61553  Elymus elymoides A. A. Beetle 1941-6-28 2804 Lassen 10 miles W of Chester, rte 36. 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
  SEINET10527893  Elymus elymoides Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2581 Lassen 6 mi S of Adin, alond Calif. hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  UC773975  Elymus elymoides subsp. elymoides L. R. Short and Wm. Gansberg 1936-7-9 S- 477 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1783 Comment
  JEPS126495  Elymus elymoides var. californicus Alia Johnson, Jocelyn Munoz, Jillian Sarazen 2016-6-28 CA 350 -72 Lassen Heading north on 395 turn right on to Smoke Creek Road and drive up the road towards the uphill to where the Rush fire burned. Comment
  CAS-BOT-BC206733  Elymus glaucus subsp. glaucus John Thomas Howell 1976-7-19 51987 Lassen Gold Run Creek southwest of Susanville - Sierra Nevada 1386 Comment
  CHSC111248  Elymus spicatus B. Castro; L. P. Janeway 2012-7-3 1938 Lassen Modoc Plateau. 16 air mi ENE of Susanville, and 0.35 mi W of Hwy 395, along road up to Shaffer Mountain. 1417 Comment
  JEPS127708  Elymus spicatus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -161 Lassen Juniper Ridge Road, before split with Juniper Tree Road. Population North of road. Comment
  UC188858  Elymus trachycaulus Milo S. Baker Lassen mts. s Dixie Valley Comment
  UCD62709  Elymus trachycaulus Beecher Crampton 1954-7-5 2058 Lassen Along Hwy. 36, 4.5 miles west of Susanville. Comment
  CHSC105211  Elymus trachycaulus subsp. trachycaulus Lowell Ahart; John Dittes 2010-7-19 17017 Lassen On the south side of the road, about 20 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
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Oct 5 2019
  SEINET3129054  Elymus triticoides J. B. Davy 1897-1 sn Lassen Honey Lake Valley. Comment
  CDA2044  Elytrigia elongata T. C. Fuller 1963-7-16 10920 Lassen Head of Secret Valley, W side of Hwy 395 to Litchfield, 14.1 miles S of Ravendale. 0 Comment
  CAS-BOT-BC81878  Ephedra viridis M. Bourell 1997-5-31 5882 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  HSC1308  Ephedra viridis K. P. St. John 1965-5-6 17 Lassen 13 mi. N of Litchfield on Hwy. 395 Comment
  HSC26173  Ephedra viridis D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19306 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  UC766775  Ephedra viridis R. F. Hoover 1940-10-5 4671 Lassen pass between Shaffer Mt. and Warren Peak Comment
  UCD14623  Ephedra viridis Nathan Horn 1989-5-18 14 Lassen Great Basin, along Highway 70. 1487 Comment
  HSC16378  Epilobium anagallidifolium M. T. Milligan 1964-7-16 143 Lassen 2 mi. W on Silver Lake Rd., along Upper Susan River 1829 Comment
  CHSC113058  Epilobium brachycarpum Lowell Ahart; John Dittes 2013-7-22 18845 Lassen West margin of a duck field, about 10 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS117496  Epilobium brachycarpum Lowell Ahart, John Dittes 2010-7-31 17005 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  JEPS121253  Epilobium brachycarpum Lowell Ahart 2013-7-22 18845 Lassen W margin of duck field, about 10 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SEINET12539614  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  SEINET12539651  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  UC773909  Epilobium brachycarpum L. R. Short and Wm. Gansberg 1936-8-11 S- 493 Lassen Burgess Spring Experiment Range Lassen National Forest 1746 Comment
  HSC22866  Epilobium brachycarpum John Pratt 1970-6-14 17 Lassen Comment
  CHSC110908  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. About 100 yards southeast of the tall poles. 1267 Comment
  CHSC117519  Epilobium campestre Lowell Ahart; John Dittes 2016-7-13 21128 Lassen West of the pond and along the poor dirt road, 60 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Biebeer, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1523739  Epilobium campestre Gary Schoolcraft 1981-9-1 571 Lassen se of Bieber (along road) 1255 Comment
  UC303060  Epilobium canum subsp. latifolium Pearl Safford 111 Lassen Susanville [uncertain locality] Comment
  CHSC113008  Epilobium ciliatum subsp. ciliatum Lowell Ahart; John Dittes 2013-7-22 18856 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  HSC68920  Epilobium ciliatum subsp. glandulosum Gary Schoolcraft 1980-7-16 315 Lassen Near Nelson Corral Reservoir 1805 Comment
  JEPS117486  Epilobium densiflorum Lowell Ahart, John Dittes 2010-7-31 16994 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  NY1000270  Epilobium densiflorum G. Schoolcraft 1982-8-18 893 Lassen West of Doyle 1585 Comment
  HSC95313  Epilobium oregonense Gordon Leppig, Juli Neander, Kai Neander 1997-7-26 688 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET3271522 Image available Epilobium oregonense Marcus E. Jones 1897-6-30 Lassen 4 mi. below Eagle Lake 1524 Comment
  HSC95344  Epilobium palustre Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 538 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS88086  Equisetum arvense Vernon H. Oswald and Lowell Ahart 1996-6-17 7821 Lassen ca. 7 mi w Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36, at 6 mi post e of Devils Corral Trailhead); Modoc Plateau 1420 Comment
  CAS-BOT-BC57303  Equisetum laevigatum John Thomas Howell; Gordon H. True 1973-8-1 50235 Lassen Headwaters of Baxter Creek, Canadian Zone forest, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC284059  Eragrostis pectinacea var. pectinacea John Thomas Howell 1975-7-23 51383 Lassen Susanville, Sierra Nevada 1295 Comment
  CDA34254  Eragrostis pectinacea var. pectinacea L. Ahart, J. Dittes 2010-8-31 17092 Lassen On the west side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, and about 7.0 miles (air) northeast of Bieber, Big Valley. Comment
  SBBG69966  Eremogone congesta S. W. Hutchinson -Jun-1925 69 Lassen Eagle Lake 1554 Comment
  SJSU9835  Eremogone congesta J. W. Tilden 1960-6-27 1505 Lassen foot of Moonlight Rd near Westwood 1524 Comment
  CAS-BOT-BC174203  Eremogone congesta var. congesta Louella Bass 1973-6-14 103 Lassen Elysian Valley 1325 Comment
  CHSC60826  Eremogone congesta var. congesta Vernon H. Oswald; Lowell Ahart 1993-6-28 5582 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  CHSC117206  Eremogone congesta var. subcongesta Lowell Ahart; John Dittes 2016-6-7 20983 Lassen 40 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
  CHSC87117  Eremogone congesta var. subcongesta L. P. Janeway 2001-6-20 7199 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
  CAS-BOT-BC159992  Eremothera boothii subsp. alyssoides G. L. Stage 1962-6-14 62 -131 Lassen 19 miles southeast of Ravendale Comment
  CAS-BOT-BC159995  Eremothera boothii subsp. alyssoides Mrs. C. C. Bruce 1898-6-1 2139 Lassen Shumway Comment
  CAS-BOT-BC159996  Eremothera boothii subsp. alyssoides P. Monnet 1913-7-4 7951 Lassen Hot Springs Peak, S.E. of Lassen County 1800 Comment
  JEPS29748  Eremothera boothii subsp. alyssoides Rimo Bacigalupi and L. R. Heckard 1962-5-28 8502 A Lassen 2 mi e Wendel Junction (n of Honey Lake, on road from US 395 past Flanagan to Pyramid Lake NV) 1219 Comment
  CHSC23501  Eriastrum signatum Wayne O. Baum 1971-7-16 71 -78 Lassen S. slope of Gallatin Peak. 2042 Comment
  JEPS14047  Eriastrum signatum Rimo Bacigalupi with G. T. Robbins 1955-7-21 5417 Lassen along Smoke Creek rd 6.8 mi e Highway 395 (s edge of valley); Secret Valley Comment
  RSA0124147  Eriastrum signatum L. P. Janeway 2008-8-2 9533 Lassen Modoc Plateau just above the flats along the S side of Rush Creek, S side of Smokey Creek Ranch road 1.8km W of the CA-NV line. 1349 Comment
  SEINET7356272  Eriastrum sparsiflorum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3932 Lassen 0.1 rd mi E of jct with Hwy 395 on Standish Buntingville Rd (A3). Buntingville. Both sides of rd.; 0 1261 Comment
  SEINET11836160  Ericameria Unknown 1948-1 s.n. Lassen near Doyle on Rt. 395 1219 Comment
  CAS-BOT-BC286601  Ericameria bloomeri Clarence R. Quick 1964-8-1 64 -94 Lassen Cal Mt. east of Poison Lake 1767 Comment
  CHSC349  Ericameria bloomeri 1944-7-31 Lassen Westwood. 1549 Comment
  UC1118663  Ericameria bloomeri H. P. Hagge 1929-9-11 15 Lassen Logan Mt. Eagle Lake Quad., Logan Mtn. 1828 Comment
  UC1118874  Ericameria bloomeri A. Simontacchi 1940-7-7 929 Lassen 0.8 mi n Cone Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC298963  Ericameria nauseosa var. hololeuca Ella Dales Cantelow 1938-10-23 2191 Lassen N of Doyle 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-BC298181  Ericameria nauseosa var. oreophila Carl B. Wolf 1931-9-4 2397 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  UC1553387  Ericameria nauseosa var. oreophila G. Schoolcraft 1988-8-24 1853 Lassen 16 mi e of Adin (Ash Valley RNA/ACEC); Ash Valley 1554 Comment
  UCD54535  Ericameria nauseosa var. oreophila Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2720 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1247 Comment
  UCD54540  Ericameria nauseosa var. oreophila Ellen Dean; Petra Unger, Dawn Cunningham 2005-10-10 2724 Lassen E. of town of Susanville, along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. Sewage treatment plant area. 1247 Comment
  CAS-BOT-BC294179  Ericameria nauseosa var. speciosa G. Schoolcraft 1994-9-13 2429 Lassen Just above gate along road to Fredonyer Peak lookout 2255 Comment
  UC527350  Ericameria parryi var. nevadensis C. B. Wolf 1931-9-6 Lassen 0.5 mi from Janesville (on the road to Wendel, w edge of Honey Lake Valley); Honey Lake Valley 1280 Comment
  CHSC25084  Erigeron K. R. Stern 1967-6-24 2408 Lassen Murrer Meadow, Ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  RSA121426  Erigeron aphanactis E. Sawyer 1935-6-27 238 Lassen Long Valley 1341 Comment
  SEINET201631  Erigeron aphanactis A. Cronquist, AH Holmgren 1959-6-17 8466 Lassen 50 mi SE of Susanville 1372 Comment
  UC87724  Erigeron aphanactis var. aphanactis unknown 1892-6-22 Lassen Honey Lake Comment
  UCR244068  Erigeron aphanactis var. aphanactis Jim Andre, G. L. Clifton 1993-6-9 19694 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  SEINET10617399  Erigeron bloomeri David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17790 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-BC294485  Erigeron bloomeri var. bloomeri John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50676 Lassen Summit ridge of Diamond Mt. 2346 Comment
  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
  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
  CHSC68843  Erigeron bloomeri var. bloomeri Vernon Oswald; Lowell Ahart 1997-6-24 8631 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  RSA768025  Erigeron bloomeri var. bloomeri L. Ahart, John Dittes 2010-7-31 17010 Lassen About 2300 feet north of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1511 Comment
  CAS-BOT-BC294486  Erigeron bloomeri var. bloomeri Clarence R. Quick 1964-7-29 64 -90 Lassen Blacks Mt. Experimental Forest 1798 Comment
  CAS-BOT-BC295979  Erigeron divergens Clare B. Hardham 1969-8-28 17421 Lassen West of Janesville, Sierra Nevada Comment
  CAS-BOT-BC296847  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-16 8340 Lassen Janesville Comment
  CHSC117510  Erigeron divergens Lowell Ahart; John Dittes 2016-7-13 21106 Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 mile south of County Road A-2, 5.3 miles(air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slop of Big Valley. 1289 Comment
  JEPS88241  Erigeron divergens Vernon H. Oswald and Lowell Ahart 1996-6-17 7808 Lassen gravel bar on edge of river e Devils Corral Trailhead (Bizz Johnson Trail) (w of 6.0 milepost, trailhead located off of Hwy 36, ca. 7 mi w of Susanville); Modoc Plateau, Susan River 1402 Comment
  RSA795322  Erigeron divergens L. 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 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1516 Comment
  CAS-BOT-BC300372  Erigeron eatonii var. plantagineus John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50688 Lassen South and southeast of Diamond Mt. 2286 Comment
  RSA0049606  Erigeron eatonii var. plantagineus Dean Wm. Taylor 2012-6-6 21226 Lassen ca. 5 air miles West of Susanville, site is 1 mile due north of the junction of Highway 44 and Highway 36 1877 Comment
  RSA702593  Erigeron eatonii var. plantagineus L. P. Janeway 2004-6-26 8156 Lassen About 1.3 km. west-southwest of Patterson Flat, at junction of roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  UC1776680  Erigeron eatonii var. plantagineus G. Schoolcraft 1993-6-29 2313 Lassen Ash Valley RNA 16 miles E of Adin 1554 Comment
  CAS-BOT-BC300424  Erigeron elegantulus Gary Schoolcraft 1983-6-29 1040 Lassen Along Hwy 139 near Upper McBride Sp. 1584 Comment
  UCR18729  Erigeron filifolius Frank C. Vasek 1975-7-11 750711- 10 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  JEPS117491  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
  UCR244069  Erigeron filifolius var. filifolius Jim Andre, G. L. Clifton 1993-6-9 19695 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CAS-BOT-BC295181  Erigeron inornatus John Thomas Howell 1974-7-10 50516 Lassen Janesville 1295 Comment
  JEPS97369  Erigeron inornatus var. calidipetris Vernon H. Oswald and L. Ahart 1995-7-24 7146 Lassen T31N R7E NW1/4 NW1/4 Sec. 24, 6250 ft, High Cascade Range, Red Fir Forest. Forest Road 31N25 0.5 mi E of Forest Route 10, near the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor 1905 Comment
  POM41676  Erigeron inornatus var. inornatus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA712920  Erigeron inornatus var. inornatus L. P. Janeway 2005-8-27 8521 Lassen High Cascade Range. Along road 22, 2.1 road km west of its beginning/end at Road 35N05 in Little Valley 1415 Comment
  UC1136838  Erigeron inornatus var. inornatus L. R. Short and D. Gish 1936-8-3 S- 397 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1795 Comment
  CHSC60817  Erigeron lassenianus var. lassenianus Vernon H. Oswald; Lowell Ahart 1993-6-28 5578 Lassen Harvey Valley Rd. (33N02), 0.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1749 Comment
  CHSC92678  Erigeron linearis L. P. Janeway; B. Castro 2005-7-10 8485 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
  UC585085  Erigeron linearis E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1792 Lassen about 5 mi N of Terno 1371 Comment
  CHSC12615  Erigeron philadelphicus Jannae Pitts 1972-6-23 265 Lassen On the road to Eagle Lake Field Station, 2 mi se of the station on the e side of the road. Comment
  UCR7844  Erigeron philadelphicus Marilyn Malin 1968-6-27 255 Lassen Spring fed roadbank on E side of Rd 425, c. 1 mi north of Gallatin Beach Picnic area, SW side of Eagle Lake. 1570 Comment
  SJSU6631  Erigeron philadelphicus var. philadelphicus H. L. Buckalew 1961-7-9 Lassen spring by Blue Lake, Warner Mountains 1920 Comment
  JEPS117505  Erigeron pumilus subsp. intermedius Lowell Ahart, John Dittes 2010-7-31 16986 Lassen About 3,330 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CHSC86949  Erigeron pumilus var. intermedius L. P. Janeway 2001-6-19 7187 Lassen High Cascade Range. Southeast edge of Long Lake (which is dry) at west end of Long Valley; 6.4 km north-northwest of Harvey Mountain. 1640 Comment
  CHSC89730  Erigeron pumilus var. intermedius L. P. Janeway 2004-6-26 8163 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  HSC82250  Erigeron pumilus var. intermedius Thomas W. Nelson, Jane Nelson 1980-7-6 5994 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  UC31462  Erigeron pumilus var. intermedius M. S. Baker and Frank Nutting 1894-6-20 Lassen Big Valley 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
  SEINET530701  Eriogonum baileyi var. baileyi Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 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
  POM253244  Eriogonum caespitosum A. A. Heller 1938-6-23 15216 Lassen Grassy, gravelly slope between Secret Valley and Ravendale, on U.S. Highway 395 1524 Comment
  CAS-BOT-BC241834  Eriogonum caespitosum Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 2 1/2 miles north of Secret Valley, C.C.C. Camp, U.S. Hy. 395 Comment
  SEINET11934606  Eriogonum caespitosum Unknown 1977-1 150 Lassen 1.6 km SE of South Fork Reservoir and 1.6 km N of Skedaddle Creek Rd. ca 8 km NE of Herlong 1660 Comment
  RSA238630  Eriogonum collinum James L. Reveal 1971-6-22 2463 Lassen Along Hwy 395, 4.5 miles south of Ravendale 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
  RSA509426  Eriogonum douglasii G. R. Ballmer 1988-7-19 s.n. Lassen Warner Mountains, vicinity of Blue Lake 1738 Comment
  POM105426  Eriogonum douglasii var. douglasii Marcus E. Jones 1897-7-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 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
  UC1305802  Eriogonum maculatum Noel H. Holmgren, James L. Reveal 1964-8-22 1724 Lassen 18 mi s along U.S. 395 Ravendale (35 mi ne of Susanville) Comment
  UC762681  Eriogonum maculatum R. F. Hoover 1940-10-5 4670 Lassen Wendel 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
  SD64343  Eriogonum microthecum var. laxiflorum D. F. Howe 1966-8-24 Lassen 39 miles northeast of Litchfield on hwy #395 1676 Comment
  UC85949  Eriogonum microthecum var. laxiflorum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  UC762680  Eriogonum nidularium R. F. Hoover 1940-9-29 4643 Lassen pass between Mt. Shaffer and Warren Peak Comment
  CAS-BOT-BC261445  Eriogonum nudum var. nudum Clare B. Hardham 1969-8-28 17442 Lassen West of Janesville Comment
  OBI76957  Eriogonum nudum var. nudum Anthony Baniaga 2011-7-5 420 Lassen Lassen Natl Forest, e of Willard Crk. Fredonyer Pass quad. T29NR10E sec 25 NE of NW 1485 Comment
  CAS-BOT-BC261446  Eriogonum nudum var. nudum Mike Vasey 1990-6-30 9056 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  JEPS56589  Eriogonum nudum var. pubiflorum Brown and Wieslander 1922-7-23 6 Lassen Martin Sprs. Eagle Lake, Martin Sprs. Comment
  SEINET14417488  Eriogonum nudum var. pubiflorum Robert L. Johnson, Mikel R. Stevens 2015-1 3925 Lassen 5.5 rd miles west of jct with Hwy 395 on Dawn Dr then rd to summit of Shaffer Mountain. Ca 16 air mi ene of downtown Susanville.; 0 1899 Comment
  UC1542949  Eriogonum nudum var. pubiflorum G. Schoolcraft 1987-7-8 1759 Lassen about 8 mi s Adin (Lonkey Hill); Lonkey Hill 1463 Comment
  CAS-BOT-BC266814  Eriogonum nummulare Arnold Tiehm 1978-10-14 4767 Lassen 7.2 road miles NE of Doyle on road 327 to Flanigan about 1.7 miles W of the Nevada line 1524 Comment
  CHSC12966  Eriogonum ovalifolium var. nivale K. R. Stern 1974-6-26 5864 Lassen Ca. 3 mi nw of intersection of Pittville Rd. with Hwy. 44, ca. 200 yds. ne of Poison Lake. 1700 Comment
  SEINET516318  Eriogonum ovalifolium var. purpureum Vernon H. Oswald 1998-9-14 9627 Lassen Windy Hollow on the W side of Hwy. 44 ca. 1 mi NW of its intersection with A21 (to Westwood). 1737 Comment
  HSC63562  Eriogonum prociduum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6027 Lassen Ash Valley, along branch road off Adin-Madeline road, 200 yds. from junction 1555 Comment
  JEPS56326  Eriogonum spergulinum var. reddingianum Hilda Grinnell 1928-6-28 Lassen near Butte Lake 1889 Comment
  NY283074  Eriogonum spergulinum var. reddingianum R. F. Hoover 1940-10-1 4656 Lassen Janesville Comment
  POM165251  Eriogonum spergulinum var. reddingianum M. S. Baker 77 Lassen Pine Creek. Comment
  POM105202  Eriogonum sphaerocephalum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC6226  Eriogonum sphaerocephalum var. halimioides 1944-6-30 Lassen Eagle Lake. Grasshopper Valley. 1624 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
  UCR55662  Eriogonum sphaerocephalum var. halimioides G. R. Ballmer 1988-7-19 s.n. Lassen Warner Mtns, vicinity of Blue Lake 1982 Comment
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  RSA0029191  Eriogonum strictum John F. Emmel 1997-6-8 1491 Lassen At Hwy. 395 crossing of Secret Creek, on hill and slope 0.2-0.3 air mi WSW of the crossing, 2.7 road mi north of Karlo Road junction. 1448 Comment
  UC1924215  Eriogonum strictum var. anserinum Debra Valov 2004-6-9 2004268 Lassen Bieber; off County A2 c. 12 km east of Hwy 299 1270 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
  CAS-BOT-BC267896  Eriogonum umbellatum Alice Eastwood; John Thomas Howell 1940-6-11 7981 Lassen Big Valley Mts. Comment
  SBBG1643  Eriogonum umbellatum H. and M. Dearing 1938-6-30 2235 Lassen 20 mi N of Susanville [Hwy 44] Comment
  CAS-BOT-BC267892  Eriogonum umbellatum Margaret M. Hanna 1956-6-3 s.n. Lassen Near Hiway 299, 62 mi. E. of Redding Comment
  CAS-BOT-BC267817  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
  CHSC13632  Eriogonum umbellatum var. modocense M. S. Taylor 1974-7-13 306 Lassen Ca. 150 ft w of Mahogany Lake, ca. 5 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC34601  Eriogonum umbellatum var. modocense Cindy Prouty 1978-7-5 13 Lassen E shore Mahogany L.; edge of meadow, close to forest margin. 2060 Comment
  CHSC4436  Eriogonum umbellatum var. modocense K. R. Stern 1967-7-1 2461 Lassen Ca. 16 mi. NE of Susanville. State Hwy 139. Comment
  RSA702592  Eriogonum umbellatum var. modocense L. P. Janeway 2004-6-26 8157 Lassen About 1.3 km. west-southwest of Patterson Flat, at junction of roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  HSC17377  Eriogonum umbellatum var. modocense M. T. Milligan 1964-7-17 144 Lassen 3.5 mi. W of Eagle Lake Rd. on Marrill Flat Rd. 1677 Comment
  CAS-BOT-BC265099  Eriogonum umbellatum var. nevadense Mrs. E. C. Van Dyke 1931-6-13 s.n. Lassen Kelly Camp, Mt. Lassen Natl. Park Comment
  CHSC106592  Eriogonum umbellatum var. nevadense C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC14170  Eriogonum umbellatum var. nevadense K. R. Stern 1974-6-26 5867 Lassen E end of Champs Flat. Comment
  UC1032270  Eriogonum umbellatum var. nevadense H. P. Hagge 1929-9-11 22 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC585250  Eriogonum umbellatum var. nevadense E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1756 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  CHSC106083  Eriogonum umbellatum var. polyanthum Lowell Ahart; John Dittes 2010-7-31 16988 Lassen About 2300 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
  JEPS117588  Eriogonum umbellatum var. polyanthum Lowell Ahart, John Dittes 2010-7-31 16988 Lassen About 2300 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
  SJSU9145  Eriogonum umbellatum var. polyanthum J. W. Tilden 1960-6-27 1497 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  JEPS56205  Eriogonum ursinum Hilda W. Grinnell 1934-6-2 Lassen Fredonyer Pass 1753 Comment
  CDA18387  Eriogonum vimineum G. D. Barbe 1978-8-31 2426 Lassen Modoc National Forest; Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). Comment
  JEPS127353  Eriogonum vimineum Lowell Ahart, John Dittes 2016-7-13 21132 Lassen 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS56154  Eriogonum vimineum W. L. Jepson 1918-8-2 7764 Lassen Beckwith Pass 1463 Comment
  CDA22697  Eriogonum vimineum T. C. Fuller 1963-7-15 10894 Lassen Road to Pittville, 4.3 miles northwest of Little Valley. 0 Comment
  HSC69595  Eriogonum vimineum J. Walker 1979-7-18 37 Lassen Near Skedaddle Creek, S portion 1311 Comment
  POM260787  Eriogonum vimineum Alice Eastwood, John T. Howell 1940-6-16 8343 Lassen Janesville. Comment
  SEINET3160096  Eriogonum vimineum subsp. vimineum L. S. Rose 1940-6-16 40596 Lassen Janesville 1280 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
  HSC23530  Eriophyllum lanatum Robyn Carter 1967-6-23 538 Lassen ca. 10 yds. off N side road; E side of Eagle Lake Murrers Meadow 1585 Comment
  CAS-BOT-BC308136  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-6 12445 Lassen Harvey Valley Comment
  CAS-BOT-BC308140  Eriophyllum lanatum var. achilleoides A. A. Heller 1938-6-23 15197 Lassen 2 miles east of Fredonyer Pass on Highway #36 1645 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
  CDA4968  Eriophyllum lanatum var. achilleoides T. C. Fuller 1963-6-1 10634 Lassen East side of road to Hall s Flat, 9.4 miles south of Pittville. 0 Comment
  UCR18727  Eriophyllum lanatum var. grandiflorum Frank C. Vasek 1975-7-11 750711- 06 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 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
  UC1924572  Erodium cicutarium Debra Valov 2006-5-29 2006022 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1280 Comment
  CHSC72213  Eryngium alismifolium Vernon H. Oswald 1998-9-14 9620 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  UC1487305  Eryngium alismifolium Yusuf Sheikh and Lincoln Constance 1973-6-27 549 Lassen 4.3 mi S of Ravendale (on State Highway 395) Comment
  UC1508837  Eryngium alismifolium Gary Schoolcraft 1981-8-11 558 Lassen Silva Flat Reservoir 1706 Comment
  RSA121673  Erysimum capitatum var. capitatum L. R. Short, B. H. Short 1936-6-15 S- 437 Lassen Lassen Forest. Longs Well. 1713 Comment
  JEPS118156  Erysimum repandum Dean W. Taylor 2009-5-21 20607 Lassen Susanville; Susanville Peak, northerly flank along logging roads ca. 1.5 air mi E of Round Valley Reservoir 1706 Comment
  CAS-BOT-BC55196  Erysimum repandum John Thomas Howell 1934-6-10 11904 Lassen 3 miles south of Ravendale. Comment
  CAS-BOT-BC150214  Erythranthe Clare B. Hardham 1969-8-28 17453 G Lassen West of Janesville 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
  CHSC60923  Erythranthe inflatula Vernon H. Oswald; Lowell Ahart 1993-7-8 5652 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CHSC71394  Erythranthe inflatula V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9257 Lassen Moll Reservoir in Ash Valley southeast of Adin. Along upper edge of the reservoir. 1615 Comment
  CAS-BOT-BC153609  Erythranthe moniliformis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49410 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC37357  Erythranthe primuloides NE Heiken 1978-7-5 73 Lassen S of Eagle L., E shore of Mahogany L. 2060 Comment
  CHSC66268  Erythranthe pulsiferae Vernon H. Oswald; Lowell Ahart 1996-6-24 7865 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 open woods on the W side of the meadow ca. 0.2 mi S of the cabins. 1633 Comment
  SEINET10933162  Erythronium purpurascens Hall 1993-6-29 Hall 4294 Lassen Plants of Mount Lassen. Soupen Springs. 8000 feet. 2440 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
  CHSC7770  Eschscholzia californica Beverley J. Wise 1969-5-17 72 Lassen City limits of Susanville on Hwy 139. 1310 Comment
  CDA3706  Euclidium syriacum E. E. Fix 1951-6-8 Lassen 0 Comment
  CHSC110771  Euphorbia crenulata Dean Wm. Taylor 2012-7-18 21273 Lassen Pumice flat nestled in the cones about 2 miles South of the south end Poison Lake (along Highway 44). 1783 Comment
  CHSC5248  Euphorbia crenulata L. Harman 1946-6-23 Lassen Eagle Lake. Near top of Roop Mt. 2133 Comment
  SEINET8506929  Euphorbia crenulata D. W. Taylor 2008-5-14 20198 Lassen Unnamed flat about 2 air miles SSE of Poison Butte 1768 Comment
  CDA14324  Euphorbia crenulata B. Corbin 1998-7-23 s.n. Lassen Lassen National Forest; Hwy 36, immed. E of junction w/Hwy 147, on Lassen NF. 0 Comment
  JEPS124752 Image available Euphorbia serpillifolia Peter Schultz 1967-7-12 76 Lassen 14.9 miles southeast of Adin on state highway 139; 1/4 mile west of Willow Creek Campground. Comment
  CAS-BOT-BC278430  Festuca idahoensis John Thomas Howell 1934-7-8 12496 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC278434  Festuca idahoensis John Thomas Howell 1976-7-20 52006 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  GMDRC6957  Festuca idahoensis J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31434 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  JEPS127719  Festuca idahoensis Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -174 Lassen 171 on Likely Mtn. After the second tight switchback the population is off the road downslope. Comment
  JEPS17718  Festuca idahoensis Rimo Bacigalupi with G. T. Robbins 1955-7-19 5371 Lassen 10.3 mi se Adin (along Ash Valley road between Adin and Madeline) 1524 Comment
  RSA0037004  Festuca idahoensis Lowell A. Ahart, John Dittes 2008-6-19 14880 Lassen About 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  RSA647539  Festuca idahoensis Marion P. Harthill 1972-6-17 822 Lassen Madeline. 1677 Comment
  UC1024801  Festuca idahoensis Leo Whitney 1935-6-23 3294 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1024811  Festuca idahoensis Leo Whitney 1935-6-17 3268 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1609257  Festuca idahoensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5585 Lassen 1.2 mi n Hwy. 44 (e side of Grays Valley, e of Poison Lake); Grays Valley 1731 Comment
  UCD65974  Festuca idahoensis L. Whitney 1935-6-17 3268 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10. Comment
  OBI75881  Festuca myuros Anthony Baniaga 2011-6-30 406 Lassen Lassen Natl Forest. E of 29N03. Fredonyer Pass quad. T29N R10E sec 24 NW of NE 1460 Comment
  UC1024937  Festuca occidentalis Leo Whitney 1935-6-27 3337 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  JEPS28299  Festuca rubra George W. Gillett 1957-7-29 947 Lassen between Butte Lake and Snag Lake; Lassen Volcanic National Park 1859 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
  UCD66336  Festuca rubra A. A. Beetle 1941-6-28 2801 Lassen 10 miles W of Chester. 1524 Comment
  JEPS95107  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
  CAS-BOT-BC52512  Frangula californica subsp. californica C. L. Hitchcock 1940-5-26 6619 Lassen lava beds ca. 12 miles north of Fall River Mills (Shasta Co.) on Fall River 1371 Comment
  CHSC4503  Fremontodendron californicum subsp. californicum C. Glascock 1965-5-15 419 Lassen 12.4 mi. w of Mineral R. S. on Hwy. 36 at n roadside. Comment
  RSA367711  Fritillaria atropurpurea Christopher Davidson 1975-6-7 2727 Lassen 2.1 mi W of Westwood on Hwy 36. 1555 Comment
  POM109791  Fritillaria pudica Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  CAS-BOT-BC506181  Fritillaria pudica Louella Bass 1974-3-26 EV 141 Lassen Sierra Nevada, Elysian Valley 1325 Comment
  CHSC117272  Galium aparine Lowell Ahart; John Dittes 2016-7-15 21223 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
  UC1609119  Galium aparine Vernon H. Oswald and Lowell Ahart 1993-6-14 5548 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd. 518, 33N89)); Eagle Lake 1566 Comment
  UC1523745  Galium bolanderi Gary Schoolcraft 1981-7-21 543 Lassen ne Pittville (along Hwy 299) 1249 Comment
  SEINET11616108  Galium boreale C. G. Gulling 1905-1 1542 Lassen Big Meadows Comment
  UC1226043  Galium multiflorum Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8471 Lassen 50 mi se Susanville 1371 Comment
  CDA42206  Galium trifidum Gordon Leppig and T. LaBanca 1997-6-29 540 Lassen Blue Lake Ranch; Modoc National Forest. Comment
  HSC95185  Galium trifidum Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 523 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1025088  Galium trifidum Leo Whitney 1934-7-27 1745 Lassen near Bridge Creek (ca 7-8 mi sw of Eagle Lake); Lassen National Forest, Bridge Creek Camp 1737 Comment
  JEPS121280  Galium trifidum subsp. columbianum Lowell Ahart, John Dittes 2013-7-23 18895 Lassen Along S margin of the levee road, about 150 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS29538  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
  CDA18258  Gayophytum diffusum subsp. parviflorum G. D. Barbe 1974-8-2 1920 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UC1258488  Gayophytum diffusum subsp. parviflorum G. Schoolcraft 1979-7-3 116 Lassen up road to Observation Lookout 4.7 mi from Horne Ranch Road intersection 2103 Comment
  UC1122617  Gayophytum heterozygum A. Simontacchi 1940-6-24 892 Lassen 0.2 mi nnw Halls Flat Ranger Station; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD150409  Gayophytum racemosum Harry A. George 1967-6-15 s.n. Lassen Willow Creek Ranch. Comment
  POM204159  Gayophytum ramosissimum J. T. Howell 1934-6-10 11843 Lassen Near Plumas Junction Comment
  JEPS31405  Gentiana newberryi G. S. Crew and C. S. Robinson 1927-7-15 68 Lassen Bogard Ranger Station, sw Lassen Co. Lassen Forest 1737 Comment
  JEPS28703  Gentianella amarella subsp. acuta George W. Gillett 1957-7-28 929 Lassen 1 mi above Butte Lake (on Widow Lake trail); Lassen Volcanic National Park 1905 Comment
  CHSC59088  Gentianopsis simplex Vernon H. Oswald; Lowell Ahart 1992-8-25 5186 Lassen Lassen Volcanic National Park. Grassy Creek on the S end of Snag Lake. 1851 Comment
  JEPS61452  Geranium viscosissimum Brown and Wieslander 1922-7-24 11 Lassen Martin Springs Eagle Lake Comment
  CHSC30615  Geranium viscosissimum var. nervosum L. Maslin 1975-7-1 2 Lassen Corn lily mdw. over the ridge s of Deans mdw. 1920 Comment
  JEPS60511  Geum triflorum Brown and Wieslander 1922-7-23 22 Lassen Eagle Lake, Martin Springs Eagle Lake; , Martin Springs Comment
  RSA702135  Geum triflorum L. P. Janeway 2004-6-26 8155 Lassen About 1.3 km. west-southwest of Patterson Flat, at junction of roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  UC1127984  Geum triflorum K. E. Bradshaw 1939-5-27 243 Lassen Lassen National Forest, Black Mountain Experimental Forest, s end of Plot 39-4 Black Mountain Experimental Forest; Lassen National Forest, Black Mountain Experimental Forest 1737 Comment
  UC506983  Geum triflorum George A. Fischer, Irwin H. Johnson 1933-7-12 F 211 Lassen Lassen National Forest, Forest and Range Experiment Station Lassen National Forest; , Forest and Range Experiment Station 1722 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
  RSA95713  Gilia modocensis Verne Grant 1955-6-8 9668 Lassen 3.6 mi n of Halleluja Jct. on hwy 395. 1311 Comment
Read comments
May 2 2012
  CHSC93697  Gilia ochroleuca Lowell Ahart; John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  CHSC71242  Gilia sinuata Vernon H. Oswald; Lowell Ahart 1998-6-4 9146 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  RSA469630  Gilia sinuata Christopher Davidson 1975-6-7 2756 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  HSC95215  Glyceria borealis Gordon Leppig 1998-7-13 974 Lassen Modoc Natl. Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC280600  Glyceria elata John Thomas Howell 1976-7-19 51984 Lassen Gold Run Creek southwest of Susanville 1386 Comment
  CAS-BOT-BC302593  Gnaphalium palustre John Thomas Howell 1973-6-28 s.n. Lassen Elysian Valley 1325 Comment
  CHSC106065  Gnaphalium palustre Lowell Ahart; John Dittes 2010-7-31 16995 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  SEINET8770761 Image available Gnaphalium palustre B. L. Wilson, D. Lytjen, N. Otting 2005-7-25 11474 Lassen Snowstorm Creek, upstream of Biscar Reservoir 1372 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
  UC1533149  Gratiola ebracteata G. Schoolcraft 1986-7-28 1664 Lassen along edge Moll Res. (w of Ash Valley); w of Ash Valley 1606 Comment
  CHSC30600  Grayia spinosa L. J. Dawson 1975-7-7 41 Lassen Ca. 500 yd e of Horselake, playa lake. 1584 Comment
  CDA6056  Grindelia nana D. Sheehy 1990-8-17 Lassen Highway 395, south of Doyle, ca. 5 miles north of Hallelujah Junction. 0 Comment
  CHSC37692  Grindelia squarrosa M. S. Taylor 1982-8-19 5024 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. 1493 Comment
  UC1123890  Gymnosteris parvula A. Simontacchi 1940-5-14 717 Lassen 10.2 mi e of Coyote Spring (Lassen National Forest); Lassen National Forest 1699 Comment
  RSA719893  Gypsophila paniculata Michael A. Vincent, K. Levings 2006-7-29 112911 Lassen Along Rt. 395, ca. 6 miles SE of Johnstonville. Comment
  CDA3429  Gypsophila paniculata T. C. Fuller 1971-10-6 19933 Lassen Northeast side of Highway 395 to Susanville, 1 mile north of Janesville. 0 Comment
  OBI76932  Hackelia californica Anthony Baniaga 2011-7-9 440 Lassen Lassen Natl forest. Windy Hollow. Pine Crk Valley quad. T31N R8E sec 15 SE of SW 1720 Comment
  CDA3149  Halogeton glomeratus E. E. Fix Jun 1949 Lassen Western Pacific Railroad right-of-way on Nevada-California line. Near Herlong. 0 Comment
  CDA38004  Halogeton glomeratus CDFA Staff 1991-1 s.n. Lassen Wendel. 0 Comment
  UCD98891  Halogeton glomeratus Les Berry; J. L. Myler, Beecher Crampton 1954-8-17 s.n. Lassen near Karlo. Comment
  SBBG8396  Helianthella californica H. and M. Dearing 1938-7-1 2246 Lassen near Westwood Comment
  CAS-BOT-BC314764  Helianthella californica var. nevadensis A. M. Vollmer; L. Beane 1953-7-1 37 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC43613  Helianthus annuus Vernon Oswald 1986-8-7 2274 Lassen Hwy 36, 15.7 mi e of the Lassen-Plumas County line, 1.7 mi sw of the Susan River. Roadside. 1447 Comment
  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
  RSA17683  Helianthus cusickii Elmer I. Applegate 1934-5-4 8927 Lassen South end of Secret Valley Comment
  SJSU14474  Helianthus cusickii W. D. Pitts 1990-5-29 299 Lassen by Hwy 395 between Madeline & Ravendale 1432 Comment
  CAS-BOT-BC305660  Helianthus cusickii Philip A. Munz 1947-5-19 11868 Lassen 27.7 miles south of Ravendale 1310 Comment
  CAS-BOT-BC305664  Helianthus cusickii A. A. Heller 1938-6-23 15209 Lassen On the grade east of Mapes on U. S. Highway #395 1371 Comment
  CHSC68846  Hemizonella minima Vernon Oswald; Lowell Ahart 1997-6-24 8592 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). On the edge of the road. 1685 Comment
  UC1037238  Hesperochiron californicus Leo Whitney 1935-6-20 3253 Lassen Lassen Nat'l Forest, Fruit Grower's Supply Company, Camp 10 Comment
  CHSC7685  Hesperochiron pumilus Beverley J. Wise 1969-5-9 46 Lassen 10.5 mi. west of Susanville on Forest serv. 8246 off Hwy. 36. 1524 Comment
  CAS-BOT-BC180030  Hesperochiron pumilus E. K. Balls 1950-5-19 14770 Lassen Ash Creek Public Camp, off rd. from Adin to Madeline. Comment
  RSA795326  Hesperolinon micranthum L. Ahart, John Dittes 2010-7-31 16975 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
  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
  UCD85293  Hesperostipa comata Beecher Crampton 1954-7-6 2068 Lassen an artemisia flat, along US Hwy. 395, 1 mile east of Johnstonville. Comment
  UC1949318  Heterotheca villosa var. minor Barbara Ertter 1987-7-24 7302 Lassen ca 3/4 mi ENE of Bechwourth Pass at end of old crumbling paved road Comment
  NY783478  Heuchera rubescens G. Schoolcraft 1982-6-23 728 Lassen Fort Sage Mountains 1828.8 Comment
  UC1562822  Heuchera rubescens Barbara Ertter with Gary Schoolcraft 1987-6-16 7201 Lassen ne side Honey Lake (between Hot Springs Peak and VABM); Skeedaddle Mountains 2255 Comment
  UC1069609  Hieracium albiflorum A. Simontacchi 1940-7-2 889 Lassen 6.2 mi ene Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC5213  Hieracium horridum M. West 1946-7-12 Lassen Silver Lake. 1981 Comment
  CAS-BOT-BC318711  Hieracium horridum Lemmon 1874-9-1 s.n. Lassen Shasta Comment
  CAS-BOT-BC315993  Hieracium nudicaule H. Dearing; M. Dearing 1938-7-1 2247 Lassen Near Westwood Comment
  RSA32855  Hieracium scouleri A. A. Heller 1938-7-28 15301 Lassen About 2 miles east of Westwood. 1524 Comment
  UC420603  Hippuris vulgaris Franklin P. Nutting 1900-8-30 Lassen Big Valley near Lookout; Big Valley Comment
  UCD84898  Holcus lanatus John Thomas Howell; Gordon H. True, M. Williams 1973-6-28 49501 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CAS-BOT-BC150128  Holodiscus microphyllus var. glabrescens P. Monnet 1913-7-4 802 Lassen Hot Springs Peak Comment
  CHSC80544  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald 2001-5-4 9997 Lassen Ash Creek Wildlife Area, Wayman Barn at the west end of Hunt Rd. 1267 Comment
  UCD85366  Hordeum brachyantherum subsp. brachyantherum Beecher Crampton 1954-7-5 2060 Lassen Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  UC1024786  Hordeum jubatum Leo Whitney 1933-8-16 2237 Lassen Eagle Lake Lassen National Forest, Eagle Lake 1584 Comment
  UCD85755  Hordeum jubatum August L. Hormay 1932-8-12 s.n. Lassen Lassen National Forest. South E edge of Eagle Lake. Comment
  CAS-BOT-BC289575  Hordeum marinum subsp. gussoneanum Geo. A. Fischer 1928-5-27 23 Lassen Willow Springs, Lassen Forest 1280 Comment
  CDA2191  Hordeum marinum subsp. gussoneanum T. C. Fuller 1963-6-1 10622 Lassen West side of road to Susanville, 2.0 miles south of Pittville. 0 Comment
  SEINET10483367  Horkelia fusca subsp. tenella Mary Merello 1993-6-28 Merello 752 Lassen Lassen National Forest, Poison Lake. Along Hwy. 44 just south of the Hwy. 89, Hwy. 44 intersection. Open pine-scrub and wetlands around lake. Volcanic soils. 1700 Comment
  SEINET5342517  Hornungia procumbens N. H. Holmgren, P. K. Holmgren 1978-6-11 8907 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 mi) east of Ravendale and 22.5 km (14 mi) airline distance. 1676 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
  CHSC41841  Hypericum formosum var. scouleri P. V. Caldwell 1972-7-13 271 Lassen Eagle Lake. Growing scattered on edge of upper Papoose Creek above forest road to Papoose Meadows. Comment
  CHSC4881  Hypericum formosum var. scouleri Bill Wilson 1967-7-6 47 Lassen Collected at Upper Murrer Meadow, 2.5 mi. E of Eagle Lake Biological Station, 10 mi. N of Susanville. 1524 Comment
  CHSC5007  Hypericum formosum var. scouleri L. G. Bennett 1967-7-8 123 Lassen Murrers Meadow, near Eagle Lake. 1493 Comment
  JEPS66829  Hypericum formosum var. scouleri Brown and Wieslander 1922-7-30 28 Lassen Eagle Lake, Martin Springs Comment
  CHSC75730  Iliamna bakeri Vernon H. Oswald; Beth Corbin, Michael Dolan 1999-7-10 9832 Lassen Blue Lake Rd. ca. 10 mi east of Madeline on the Meeks prescribed burn (1990). 1859 Comment
  NY52522  Iliamna bakeri G. Schoolcraft 1984-8-27 1371 Lassen Eastern slopes of Little Hat Mtn. 1981.2 Comment
  HSC63937  Ipomopsis aggregata Teresa Prendusi 1980-7-21 Lassen Fredonyer Peak. alongside rd. to lookout 2317 Comment
  HSC17038  Ipomopsis aggregata Fred J. Kindel 1955-6-28 Lassen Susan River Comment
  UC1483837  Ipomopsis aggregata subsp. bridgesii G. Schoolcraft 1980-7-29 341 Lassen Widow Peak, Bureau of Land Management 1584 Comment
  CHSC6203  Ipomopsis aggregata subsp. formosissima P. Balch 1955-7-17 Lassen Eagle Lake. Mouth of Papoose Creek, near Gallatin Beach. 1561 Comment
  RSA18257  Ipomopsis aggregata subsp. formosissima Wolf 1929-9-1 3785 Lassen Mt. Lassen National Park between Grassy Lake and Snag Lake Comment
  SD7212  Iris missouriensis R. M. Austin 1879-1 Lassen Eagle Lake. Comment
  CDA34397  Isatis tinctoria E. Finley 1986-6-18 Lassen Near Nubieber, U.S. 299. 0 Comment
  CAS-BOT-BC69981  Isoetes bolanderi John Thomas Howell 1959-9-23 34891 Lassen Juniper Lake Campground, Lassen Park. 2057 Comment
  CAS-BOT-BC324779  Iva axillaris M. S. Taylor 1982-8-19 5022 Lassen E side of Highway 395 ca. 4 miles north of its junction with Highway 70 at Hallalujah Junction 1493 Comment
  JEPS41099  Iva axillaris subsp. robustior W. L. Jepson 1918-8-2 7787 Lassen Long Valley 1371 Comment
  RSA293373  Iva axillaris subsp. robustior Reino Alava 1957-7-5 1140 Lassen Along Highway no. 395, 4.4 miles S of Ravendale. Comment
  CHSC35570  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 miles west of Madeline. Comment
  HSC77273  Ivesia paniculata Teresa Prendusi 1980-7-14 Lassen Ash Valley, along Ash Valley Rd., 15 mi. W of Madeline 1549 Comment
  RSA59709  Ivesia paniculata E. K. Balls 1950-5-19 14783 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
  RSA614443  Ivesia paniculata M. L. Carlson 1996-6-11 s.n. Lassen 16 miles southeast of Adin on County Road 527 Comment
  SEINET3860245  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 mi W of Madeline.; 0 Comment
  UC1594844  Ivesia paniculata J. Stephen Shelly and Ginger V. King 1985-6-29 1029 Lassen Adin-Madeline Rd. Ash Valley (15.4 mi w of U.S. Hwy 395) 1554 Comment
  CHSC5267  Juncus balticus 1944-6-26 Lassen Eagle Lake. 1584 Comment
  UC1100949  Juncus balticus Verne Grant and Irving Schneider 1947-7-31 8211 Lassen ne quarter of George Williams section 19 Madeline Plain Comment
  UC1100988  Juncus balticus Malcolm A. Nobs and S. Galen Smith 1949-7-21 1062 Lassen 4 mi n Madeline Comment
  GMDRC7742  Juncus balticus subsp. ater J. M. Andre, G. Clifton 1993-6-11 33423 Lassen Modoc Plateau: NW of Snowstorm Mtn, approx. 3 mi. east of Horse Lake, 12 mi. S of Ravendale 1545 Comment
  UC1142944  Juncus balticus subsp. ater A. L. Hormay 1941-6-18 4 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  UCD141331  Juncus balticus subsp. ater John Thomas Howell 1959-9-23 34881 A Lassen North end of Juniper Lake. 2057 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
  SEINET11787326  Juncus bufonius A. Tiehm, Nachlinger, J.; Schoolcraft, G. 1984-1 8824 Lassen Rodeo Flat, 2.7 road mi W of state line on Buckhorn road from Ravendale to Hwy 81 1829 Comment
  CHSC60863  Juncus bufonius var. occidentalis Vernon H. Oswald; Lowell Ahart 1993-6-28 5598 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  JEPS107804  Juncus bufonius var. occidentalis Lowell Ahart, John Dittes 2005-6-2 11958 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
  UC1107336  Juncus bufonius var. occidentalis Jean Langenheim 1957-6-22 4364 Lassen near Eagle Lake edge; Eagle Lake Comment
  UC1137590  Juncus confusus A. Simontacchi 1940-7-3 918 Lassen 3.4 mi wsw Harvey Mtn. Lookout; Halls Flat Quad. 1828 Comment
  CHSC101039  Juncus hemiendytus var. hemiendytus John Dittes 2008-5-22 1521 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 480 feet north of intersection of Hwy 139 and FS Road 36N02; open, rocky volcanic toe-slope on northeast side of Willow Creek. 482 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
  JEPS28712  Juncus howellii George W. Gillett 1957-7-29 943 Lassen along trail between Butte Lake and Snag Lake; Lassen Volcanic National Park 1859 Comment
  SEINET3507366 Image available Juncus longistylis Marcus E. Jones 1897-6-30 Lassen Susanville, 4 miles below Eagle Lake Comment
  POM110628  Juncus macrandrus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CAS-BOT-BC110768  Juncus mertensianus John Thomas Howell; Gordon H. True 1973-8-1 50249 Lassen Sierra Nevada. Diamond Range. Gold Run Creek road south of Susanville. 1950 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
  UC506935  Juncus mexicanus George A. Fischer and Irwin H. Johnson 1933-7-12 F- 238 Lassen Patterson Flat Lassen National Forest 1737 Comment
  JEPS28702  Juncus nevadensis George W. Gillett 1957-7-28 924 Lassen above trail to Widow Lake junction with Snag Lake trail (at upper end of Butte Lake); Lassen Volcanic National Park, Butte Lake 1859 Comment
  JEPS28706  Juncus nevadensis George W. Gillett 1957-7-28 934 Lassen Widow Lake Lassen Volcanic National Park 2072 Comment
  CHSC105756  Juncus nevadensis var. nevadensis Peter F. Zika 2008-7-14 23892 Lassen Cascade Range Highlands (CaRH). S side of Route 44, SE end of Grays Valley near Lodgepole. 1730 Comment
  JEPS121289  Juncus nevadensis var. nevadensis Lowell Ahart, John Dittes 2013-7-23 18906 Lassen On the SW side of a man-made pond, about 160 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1142959  Juncus orthophyllus A. L. Hormay 1941-6-25 30 Lassen Westwood Junction Lassen National Forest 1737 Comment
  HSC103618  Juncus orthophyllus Thomas W. Nelson, Jane Nelson 1985-8-10 8008 Lassen Along north side of Silver Lake 1829 Comment
  SBBG126190  Juncus trilocularis P. F. Zika 2008-7-14 23893 Lassen S side of St Hwy 44, SE end of Grays Valley near Lodgepole 1730 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
  UCSB233  Juniperus occidentalis Haller, John 1959-08 Lassen 2 miles north of Susanville on road to Eagle Lake and Adin 1371 Comment
  UCR3791  Juniperus occidentalis var. occidentalis Frank C. Vasek 1964-9-12 640912- 09 Lassen US Hwy 395, at Hwy rest area 12.2 mi south of Ravendale Comment
  SEINET11066903  Juniperus osteosperma G. Schoolcraft 1998-4-27 2705 Lassen N end of Fort Sage Mountains, W slope. 1951 Comment
  UC1125668  Kelloggia galioides H. P. Hagge 1929-9-17 37 Lassen Logan Mtn.; Eagle Lake Quad. 1828 Comment
  UC1609265  Kelloggia galioides Vernon H. Oswald and Lowell Ahart 1993-7-8 5657 Lassen se edge Poison Lake (1.9 mi n of Hwy 44, Pittville Rd (Lassen 111, 36N01), between the railroad and the lake) 1709 Comment
  SEINET10869776  Kelloggia galioides Mary Susan Taylor 1974-1 Taylor 273 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UCR244048  Kochia americana Jim Andre 1993-6-1 19718 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CAS-BOT-BC180850  Kochia scoparia Louella Bass 1981-9-29 s.n. Lassen Standish Comment
  UC1132160  Koeleria macrantha A. Simontacchi 1940-7-8 945 Lassen 5.2 mi s Jelly Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1483844  Koeleria macrantha G. Schoolcraft 1980-7-28 335 Lassen e side Tule Mountain; e side of Tule Mtn. 2042 Comment
  CAS-BOT-BC340319  Kyhosia bolanderi A. A. Heller 1937-9-1 15342 Lassen About a mile east of Westwood 1524 Comment
  CHSC66719  Kyhosia bolanderi Vernon H. Oswald; Lowell Ahart 1996-8-1 8116 Lassen N shore of the Hamilton Branch of the N. Fork of the Feather River ca. 0.1 mi downstream from Indian Ole Dam on Mountain Meadows Reservoir, SW of Westwood. 1524 Comment
  UC891450  Kyhosia bolanderi A. A. Heller 1937-9-1 15342 Lassen about a mile e of Westwood Comment
  CAS-BOT-BC341481  Lagophylla ramosissima Barrett Anderson 1986-7-9 3122 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  CDA8086  Lagophylla ramosissima T. C. Fuller 1964-10-7 12692 Lassen Hillside Cemetery, south side of Highway 299 to Fall River Mills, ca. 2 miles southwest of Nubieber. 0 Comment
  RSA795323  Lagophylla ramosissima subsp. ramosissima L. Ahart, John Dittes 2010-7-31 16997 Lassen On the north side of the road, about 5 yards west of the large culvert, 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 1516 Comment
  JEPS89760  Lasthenia glaberrima Dean Wm. Taylor with Glenn L. Clifton, Rexford E. Palmer and Roy Buck 1988-6-6 9004 Lassen road from Bieber to Lookout 0.5 mi s of the Modoc County Line (Big Valley, Pit River Watershed); Big Valley, Pit River Watershed 1249 Comment
  RSA0045638  Lasthenia glaberrima Lowell Ahart, John Dittes 2008-6-22 15041 Lassen About 20 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
  UC30620  Layia glandulosa M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  UC468843  Layia glandulosa Franklin P. Nutting Lassen Dixey Valley Comment
  CAS-BOT-BC321497  Layia glandulosa Margaret Williams 1974-7-27 74- 2 -51 Lassen Burned area near Hallelujah Junction, W of Hwy 395 and S of Hwy 70 1493 Comment
  POM30358  Layia glandulosa subsp. glandulosa Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC55668  Lemna minuscula Mrs. R. M. Austin Jun 1894 Lassen Willow Creek Valley, Cold Springs Cold Springs; Willow Creek Valley, Cold Springs Comment
  UC1101282  Lemna turionifera Malcolm A. Nobs, S. Galen Smith 1949-8-20 1483 Lassen 1 mi n of Doyle (Honey Lake Valley, Long Creek); Honey Lake Valley, Long Creek Comment
  UC1101286  Lemna turionifera Malcolm A. Nobs, S. Galen Smith 1949-7-21 1051 Lassen 1 mi e of Madeline Comment
  CAS-BOT-BC88819  Lepidium campestre John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49226 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 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
  CHSC48334  Lepidium campestre Vernon Oswald 1986-5-28 2046 Lassen Hwy 36, 9.8 mi e of the Plumas-Lassen County line, 2.0 mi sw of Fredonyer Pass. Along the road. 1584 Comment
  CHSC75476  Lepidium chalepense Vernon H. Oswald; Lowell Ahart 1999-6-9 9749 Lassen Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area: on the dam of the reservoir. 1353 Comment
  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
  CHSC64873  Lepidium perfoliatum Vernon H. Oswald; Lowell Ahart 1995-6-19 6899 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. Near the road. 1383 Comment
  HSC63973  Lepidium perfoliatum J. P. Smith, J. O. Sawyer 1971-5-23 4665 Lassen Junction of Hwy. 139 and road to Thermo Comment
  JEPS114647  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
  HSC6828  Lepidium perfoliatum K. P. St. John 1965-5-6 28 Lassen Susanville, across from Walker's Restaurant Comment
  SEINET10448293  Lepidium perfoliatum Mary Susan Taylor 1982-5-29 Taylor 4565 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
  JEPS53770  Lepidium virginicum var. virginicum W. L. Jepson 1918-8-2 7763 Lassen Beckwith Pass 1463 Comment
  UC572594  Leptodactylon pungens E. Sawyer 1935-6-27 230 Lassen Long Valley; Sierraville Quad., Long Valley Comment
  CHSC99130  Leptosiphon bolanderi Lowell Ahart; John Dittes 2008-6-19 14892 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
  RSA713121  Leptosiphon ciliatus L. P. Janeway, B. Castro 2005-7-10 8480 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01. 1859 Comment
  CHSC25901  Leptosiphon harknessii K. R. Stern 1967-6-24 2427 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC4771  Leptosiphon harknessii R. Carter 1967-6-27 562 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology station. 1584 Comment
  CHSC60758  Leptosiphon harknessii Vernon H. Oswald; Lowell Ahart 1993-6-14 5516 Lassen Eagle Lake Rd. (Lassen A1), 0.5 mi SW of Spaulding Tract Rd. (Rd. 518, 33N89), ca. 3 mi W of Eagle Lake. 1810 Comment
  POM253335  Leptosiphon harknessii A. A. Heller 1939-7-28 15299 Lassen About a mile east of Westwood in the Arid Transition Life zone 1524 Comment
  POM74198  Leptosiphon harknessii Marcus E. Jones 1897-6-24 10397 Lassen 10 to 15 miles west from Amedee. 1220 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
  HSC63766  Leucocrinum montanum Teresa Prendusi 1980-5-6 Lassen W side of SR 395, 0.25 mi. from old gas station 1616 Comment
  OBI83366  Leucocrinum montanum Rhonda Riggins 1989-4-27 1650 Lassen US 395, 1.1 mi N Madeline, 8.8 mi S Modoc Co line 1676 Comment
  SEINET12044970  Leucocrinum montanum R. M. Austin 1879-1 s.n. Lassen Pine Creek Comment
  CHSC71315  Lewisia nevadensis Vernon H. Oswald 1998-6-22 9231 Lassen Champs Flat Rd. (A-21) 1.8 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1749 Comment
  UC614395  Lewisia nevadensis L. Constance 1938-6-11 2326 Lassen 5 mi sw Susanville 1371 Comment
  RSA299613  Leymus cinereus J. T. Howell 1974-7-9 50495 Lassen Susanville; Sierra Nevada 1296 Comment
  UC1924193  Leymus cinereus Debra Valov 2005-8-20 2005237 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1279 Comment
  UC1542930  Leymus triticoides G. Schoolcraft 1987-6-3 1719 Lassen Painter Flat; w side 1706 Comment
  UCD65610  Leymus triticoides L. Whitney 1933-8-5 s.n. Lassen Lassen National Forest. Near Slate Cr. 1889 Comment
  UCD87721  Leymus triticoides R. N. Raynor 1939-6-3 s.n. Lassen Susanville. Comment
  CHSC112422  Limosella aquatica Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18755 Lassen Near a drainage filled with dirt from construction of a pond, about 50 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1025096  Linanthus harknessii Leo Whitney 1934-5-27 1639 Lassen near Crater Lake 1828 Comment
  CHSC79186  Linanthus pungens L. P. Janeway 2000-6-24 6838 Lassen Northern High Sierra Nevada. Volcanic promontory on south edge of the top of Crystal Peak. 2371 Comment
  CDA33308  Linanthus pungens F. Taylor, Agric. Comm. 1932-9-1 Lassen Beiber; near Niles Ranch 0 Comment
  UC106752  Linanthus septentrionalis T. S. Brandegee 1892-6-30 Lassen Jonesville Comment
  JEPS117582  Linum lewisii var. lewisii Lowell Ahart, John Dittes 2010-7-31 16981 Lassen Dry meadow 10 yards northeast of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  RSA0035912  Linum lewisii var. lewisii Lowell A. Ahart, John Dittes 2008-6-20 14917 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC435429  Lithophragma glabrum Louella Bass 1974-4-16 EV 149 Lassen Elysian Valley; Sierra Nevada 1325 Comment
  UC1258492  Lithophragma glabrum G. Schoolcraft 1980-4-8 201 Lassen along Shaffer Mountain Peak road just w Hwy. 395; Shaffer Mountain Peak road 1402 Comment
  UC496334  Lithophragma tenellum Doris Kildale Gillespie 1930-5-13 9369 Lassen between Susanville and Janesville Comment
  POM92082  Lithophragma tenellum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CAS-BOT-BC269059  Lolium perenne John Thomas Howell; Gordon H. True 1973-8-1 50187 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 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
  CHSC42595  Lomatium bicolor var. leptocarpum Vernon Oswald 1986-5-28 2048 Lassen Hwy 36, 11.3 mi e of the Plumas-Lassen Co. line, 0.5 mi sw of Fredonyer Pass. 1691 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
  CAS-BOT-BC211117  Lomatium canbyi B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6552 Lassen Just S of Ravendale 1580 Comment
  POM78249  Lomatium donnellii Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  RSA271913  Lomatium donnellii Christopher Davidson 1975-6-7 2755 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  SEINET10545797  Lomatium macrocarpum David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17756 Lassen Approx. 12 mi. S of Adin on CA Hwy. 139, in basalt & clay; along edge of road on rolling knoll, in Artemisia-Juniper assoc. 1372 Comment
  RSA517344  Lomatium nevadense Barbara Ertter, Gary Schoolcraft 1987-6-16 s.n. Lassen Skeedaddle Mountains on NE side of Honey Lake 2134 Comment
  CHSC66230  Lomatium nevadense var. nevadense Vernon H. Oswald; Lowell Ahart 1996-6-24 7862 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
  JEPS107470  Lomatium nevadense var. nevadense Lowell Ahart, John Dittes 2005-6-1 11847 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS118215  Lomatium nevadense var. nevadense Dean W. Taylor 2004-5-11 19060 Lassen 1.5 miles southwest of Constantina along Highway 395 1402 Comment
  JEPS96076  Lomatium nevadense var. nevadense Vernon H. Oswald and Lowell Ahart 1996-6-24 7862 Lassen 2.5 mi. s. Eagle Lake (Papoose Meadows, ca. 0.5 mi. e. of Eagle Lake Rd. (A1), w. side of the meadow ca. 0.4 mi. s. of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1123081  Lomatium nevadense var. nevadense A. Simontacchi 1940-5-14 709 Lassen 10.2 mi. e. Coyote Spring (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  UC1520662  Lomatium nevadense var. nevadense Noel H. Holmgren and Patricia K. Holmgren 1980-7-4 9513 Lassen 18 km. (11 mi.) airline distance e. Ravendale (s. side Observation Peak); Observation Peak Comment
  CHSC108004  Lomatium nudicaule Lowell Ahart; John Dittes 2011-6-20 17497 Lassen About 40 yards east of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CAS-BOT-BC217795  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6564 Lassen U.S. Hwy 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield 1330 Comment
  CAS-BOT-BC217796  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6558 Lassen Just S of Ravendale 1580 Comment
  CAS-BOT-BC217800  Lomatium ravenii David D. Keck; J. Clausen 1935-6-24 3738 Lassen 2 mi. S. of Ravendale 1464 Comment
  JEPS25531 Image available Lomatium ravenii Rimo Bacigalupi with Lincoln Constance 1959-6-16 7145 Lassen 2 mi. s. Ravendale 1615 Comment
  JEPS28836 Image available Lomatium ravenii Lincoln Constance and Emil DiFulvio 1962-4-16 3747 Lassen 1 mi. s. Ravendale 1615 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
  CHSC42628  Lomatium triternatum var. macrocarpum Vernon Oswald 1986-5-28 2050 Lassen Hwy 36, 15.0 mi e of Plumas-Lassen Co. line, 3.5 mi ne of Fredonyer Pass. 1508 Comment
  CHSC42629  Lomatium triternatum var. macrocarpum Vernon Oswald 1986-5-28 2059 Lassen Hwy 139 between Eagle Lake and Adin, 38.1 mi n of Susanville. 1645 Comment
  CHSC42630  Lomatium triternatum var. macrocarpum Vernon Oswald 1986-5-28 2059 Lassen Hwy 139 between Eagle Lake and Adin, 38.1 mi n of Susanville. 1645 Comment
  HSC28305  Lomatium utriculatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19255 Lassen Harvey Valley near Cone Springs Comment
  CHSC58490  Lonicera conjugialis Vernon H. Oswald 1992-7-3 5050 Lassen Lassen Volcanic National Park. Trail from Juniper L. to Snag L., ca. 0.1mi N of Cameron Meadow. 1950 Comment
  JEPS13678  Lonicera conjugialis W. L. Jepson 1910-6-11 4119 Lassen Snag Lake 1889 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
  JEPS126485  Lotus corniculatus Valda Lockie, Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemky 2015-7-16 CA 350 -049 Lassen Take Smoke Creek Road to Sand Pass Road. Turn left at Parker Reservoir. Comment
  NY716012  Lotus tenuis G. Schoolcraft 1988-7-7 1819 Lassen Near creek crossing northwest of Horne Ranch 1646 Comment
  CHSC68863  Lupinus arbustus Vernon Oswald; Lowell Ahart 1997-6-24 8635 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  SEINET10490461  Lupinus arbustus subsp. arbustus Paul Gallian, Billy Joe Cox 1971-6-2 Gallian 478 Lassen Ca 3 miles s of janesville at honey lake, rest area on us hwy 395; in Sagebrush-grass margin between jeffery pine-oak forest and honey lake 1250 Comment
  NY732862  Lupinus arbustus subsp. calcaratus H. D. D. Ripley 1944-5-30 5975 Lassen Ravendale 1676 Comment
  NY732864  Lupinus arbustus subsp. calcaratus G. Schoolcraft 1985-6-12 1417 Lassen 1/2 mile south of Cleghorn Flat 1890 Comment
  NY732866  Lupinus arbustus subsp. calcaratus P. Gallian 1971-6-2 478 Lassen Approx. 3 miles south of Janesville at Honey Lake, rest area on U.S. Highway 395 1250 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-BC196341  Lupinus argenteus var. argenteus Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 3 1/2 miles S. of Secret Valley C.C.C. Camp, U.S. Hy. 395 Comment
  CAS-BOT-BC208730  Lupinus argenteus var. heteranthus L. S. Smith 1918-8-13 1035 Lassen Silver Cr., Modoc Forest Comment
  CAS-BOT-BC208734  Lupinus argenteus var. heteranthus Walter Knight; Irja Knight 1981-5-20 4116 Lassen 27 miles S of Alturas Comment
  CAS-BOT-BC208742  Lupinus argenteus var. heteranthus Elmer I. Applegate 1923-9-30 4032 Lassen Doyle Comment
  CAS-BOT-BC208745  Lupinus argenteus var. heteranthus John Thomas Howell 1974-7-8 50461 Lassen Susanville - Sierra Nevada 1295 Comment
  CAS-BOT-BC208746  Lupinus argenteus var. heteranthus John Thomas Howell 1934-7-10 12560 Lassen Black's Mt. Comment
  CAS-BOT-BC208757  Lupinus argenteus var. heteranthus Doris Kildale Gillespie 1930-5-13 9372 Lassen Between Susanville and Janesville. Comment
  CAS-BOT-BC208761  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-6-13 47443 Lassen Highway 299, Nubieber, 6.6 miles west. Comment
  CDA27387  Lupinus argenteus var. heteranthus T. C. Fuller 1963-6-11 10660 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  JEPS114624  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2008-6-19 14873 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  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
  NY736924  Lupinus argenteus var. heteranthus T. W. Nelson 1980-7-6 6015 Lassen Along Adin-Madeline road ca. 0.5 mile west of Moll Reservoir 1585 Comment
  NY736928  Lupinus argenteus var. heteranthus W. A. Archer 1938-6-16 6019 Lassen 3 miles west of Doyle Comment
  SEINET11261487  Lupinus argenteus var. heteranthus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3926 Lassen 5.5 rd miles west of jct with Hwy 395 on Dawn Dr then rd to summit of Shaffer Mountain. Ca 16 air mi ene of downtown Susanville.; 0 1899 Comment
  UC1776671  Lupinus argenteus var. heteranthus G. Schoolcraft 1993-6-10 2296 Lassen Along Clark's Valley Road w. of Clark's Valley Ranch 1859 Comment
  UC1924256  Lupinus argenteus var. heteranthus Debra Valov 2004-5-31 2004231 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UCD106809  Lupinus argenteus var. heteranthus R. N. Raynor 1939-6-3 s.n. Lassen Susanville. Comment
  UCD106819  Lupinus argenteus var. heteranthus Grady L. Webster 1989-5-13 7712 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  SEINET10484833  Lupinus aridus Billy Joe Cox 1971-6-11 Cox 3190 Lassen 6 mi w. Of susanville on calif. Hwy 36; in volcanic soil; association with Pinus ponderosa forest. 1615 Comment
  SEINET10969898  Lupinus brevicaulis David B. Dunn 1956-7-3 Dunn 11916 Lassen Coll. On a dry rocky slope with only an occasional juniper, considerable Artemisia tridentata. N side of the alkali flats, 31 mi. Ne of johnstonville On hwy 395. Comment
  CAS-BOT-BC196639  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  POM253163  Lupinus caudatus A. A. Heller 1938-6-23 15203 Lassen Along U.S. Highway 395 just outside of Johnstonville. Comment
  RSA8059  Lupinus caudatus H. A. Barker 1927-7-15 806 Lassen Desert east of Beckwith near highway. Comment
  RSA39736  Lupinus caudatus Philip A. Munz 1947-5-20 11888 Lassen Milford. 1265 Comment
  RSA60369  Lupinus caudatus E. K. Balls 1950-5-9 15948 Lassen 6 miles south of Doyle. 1372 Comment
  SEINET10490671  Lupinus caudatus subsp. caudatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 458 Lassen 6 mi. N of hallelujah jact on us hwy 395, in aremisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  SEINET10940170  Lupinus confertus Thomas W. Nelson, Jane P. Nelson 1981-7-17 Nelson 6735 Lassen Along State Route 395, 22 mi S of Susanville, California, at milepost marker 46.80. Sagebrush scrub. Comment
  CHSC4818  Lupinus lepidus var. confertus R. Carter 1967-7-16 618 Lassen Willow Creek Valley, e of Murrer's Ranch, 1.5 mi w of highway 139 on rd to Eagle Lake, ca. 12 mi n of Susanville, on s side of rd. Comment
  UC1533129  Lupinus lepidus var. confertus G. Schoolcraft 1986-5-20 1579 Lassen along road to Hanson Ranch ne Horse Lake; ne of Horse Lake 1554 Comment
  UC572381  Lupinus lepidus var. confertus H. S. Yates 1936-8-11 6071 Lassen Baxter Creek; Susanville Quadrangle, Baxter Creek Comment
  CHSC91606  Lupinus leucophyllus L. P. Janeway 2005-7-4 8473 Lassen High Cascade Range. 0.2 km south of Road 33N02 on low ridge between Burgess Spring and Dixie Spring, along Road 33N02C. 1746 Comment
  SEINET9185950 Image available Lupinus leucophyllus Anthony Baniaga 2011-1 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  UC126929  Lupinus leucophyllus M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  UC201948  Lupinus leucophyllus Franklin P. Nutting Lassen flat near Eagle Lake; Flat near Eagle Lake Comment
  NY747375  Lupinus leucophyllus var. leucophyllus H. D. D. Ripley 1943-6-13 5679 Lassen Milford 1265 Comment
  NY747426  Lupinus microcarpus G. Schoolcraft 1982-6-29 742 Lassen Along Highway 395 south of Madeline 1615 Comment
  NY747435  Lupinus microcarpus A. A. Heller 1938-6-23 15219 Lassen Along the highway (U.S. #395) between Termo and Madeline 1524 Comment
  UCSC010319  Lupinus microcarpus var. microcarpus Unknown 2016-6-7 21018 Lassen West edge of State Highway 299, Big Valley Mountains, 0.4 air miles northeast of Big Valley Summit, 5.0 air miles southwest of Bieber. 1398 Comment
  JEPS103183  Lupinus nevadensis G. Schoolcraft 2000-4-26 2892 Lassen East slopes of Shaffer Mountain 1584 Comment
  JEPS94110  Lupinus nevadensis Vernon H. Oswald and Lowell Ahart 1998-5-22 9113 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.6 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1402 Comment
  SEINET8058059  Lupinus nevadensis G. Schoolcraft 1997-5-7 2587 Lassen Fort Sagae Mtns. ne of Doyle CA. 1585 Comment
  SBBG67020  Lupinus obtusilobus S. W. Hutchinson -Jun-1925 525 Lassen Eagle Lake 1554 Comment
  UC574453  Lupinus onustus M. E. Jones 1897-6-26 Lassen Perkin's Ranch Susanville (Susanville) 1463 Comment
  RSA18697  Lupinus onustus Marcus E. Jones 1887-06 s.n. Lassen Susanville Comment
  NY747611  Lupinus polyphyllus var. saxosus H. D. D. Ripley 1944-5-30 5982 Lassen 2 miles south of Madeline 1707 Comment
  SEINET10485916  Lupinus sellulus var. lobbii Duane Isely, I. Isely 1971-7-12 Isely 11383 Lassen Ca 1 mi from state #44, road to bogard campground, lassen national forest (30 Mi nw of susanville). Sagebrush opening in woodlands; fugitive against rocks Or by sagebrush; arising from vertical rhizones from subterranean caudex; Corolla dull mauve; keel tip light. 1676 Comment
  POM252848  Lupinus subvexus var. subvexus A. A. Heller 1938-6-23 15219 Lassen Along U. S. H ighway 395 between Termo and Madeline. 1524 Comment
  JEPS67163  Luzula comosa var. laxa M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek, Big Valley Mts. Comment
  UC905682  Madia citrigracilis David D. Keck 1930-7-23 949 Lassen Susanville Sierra Nevada, Susanville 1280 Comment
  CAS-BOT-BC342658  Madia citriodora G. Schoolcraft 1989-6-5 1897 Lassen Intersection of Hwy. 139 & A2 south of Adin Comment
  UC296085  Madia elegans E. B. Babcock and J. L. Collins 1926-7-21 88 Lassen near Peter Lassne's grave; Susanville Comment
  CAS-BOT-BC343694  Madia elegans Elmer I. Applegate 1923-9-30 4034 Lassen Constantia Comment
  SEINET11601334 Image available Madia elegans M. J. Williams, G. L. Smith 1983-1 83- 155 -2 Lassen 5 mi E of Hwy 395 on A-3 which joins the road to Alturas 1372 Comment
  RSA719892  Madia elegans subsp. elegans Michael A. Vincent, K. Levings 2006-7-29 12912 Lassen Along Rt. 395, ca. 6 miles SE of Johnstonville. Comment
  UC76023  Madia exigua Milo S. Baker Jul 1905 Lassen Dixie Valley Comment
  UC717967  Madia glomerata David D. Keck 1944-7-8 5447 a Lassen 2 mi e Westwood (in meadow leading down to Mountain Meadows Reservoir); Sierra Nevada 1524 Comment
  UC905684  Madia glomerata David D. Keck 1930-7-23 955 Lassen 15 mi w Susanville; Sierra Nevada 1525 Comment
  CAS-BOT-BC334691  Madia glomerata Alice Eastwood 1912-8-22 1801 Lassen Morgans Springs, Lassen Butte Region Comment
  CAS-BOT-BC343056  Madia gracilis John Thomas Howell 1973-7-10 49781 Lassen Fredonyer Pass 1737 Comment
  CAS-BOT-BC343055  Madia gracilis David D. Keck 1930-7-23 949 Lassen Susanville 1280 Comment
  UCD54571  Malvella leprosa Ellen Dean; Dawn Cunningham 2005-10-25 2754 Lassen E. of town of Susanville. Private property N of California Correctional Facility. Western side of property around large playa pond. 1248 Comment
  JEPS114634  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-20 14911 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA647538  Matricaria matricarioides Marion P. Harthill 1972-6-16 783 Lassen Doyle 1372 Comment
  JEPS107816  Medicago lupulina Lowell Ahart, John Dittes 2005-6-2 11966 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  CHSC112987  Melilotus officinalis Lowell Ahart; John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS63459  Mentha canadensis W. L. Jepson 1918-8-2 7784 Lassen on lower bench Long Valley Creek (1 mi below Boni Ranch house, Long Valley); Long Valley, on lower bench of Long Valley Creek 1371 Comment
  SFV12339  Mentzelia albicaulis J. Major 1966-6-24 s. n. Lassen Warner Mountains Above Blue Lake, about 18 miles (airline) southeast of Likely. 1905 Comment
  UCD117212  Mentzelia albicaulis Grady L. Webster 1989-5-13 7705 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  JEPS124818 Image available Mentzelia albicaulis M. L. Wheelis 1964-6-30 128 Lassen 11.5 miles north fo Susanville on highway 139. Comment
  RSA152590  Mentzelia albicaulis I. L. Wiggins, Dorothy Wiggins 1961-6-11 16340 Lassen 13.5 mi. E. of Susanville. Comment
  CHSC13851  Mentzelia dispersa J. Grove 1973-7-30 Lassen At Sugar Pine Basin. 1524 Comment
  CHSC92643  Mentzelia dispersa L. P. Janeway 2005-7-4 8470 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 1752 Comment
  UC1121687  Mentzelia dispersa A. Simontacchi 1940-6-5 818 Lassen 8 m wnw Harvey Valley Ranger Station; Halls Flat Quad, Lassen National Forest Comment
  UC1609316  Mentzelia dispersa Vernon H. Oswald and Lowell Ahart 1993-6-14 5511 Lassen ca 4 m (air) w Eagle Lake (1.0 m n of its jct. with Lassen A21, on the w edge of Brockman Flat Lava Beds.); Lassen A1 (Eagle Lake Rd.); SE 1/4 SW 1/4 1810 Comment
  POM260353  Mentzelia dispersa C. L. Hitchcock 1940-5-26 6606 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  UCR73830  Mentzelia montana G. L. Webster 1989-5-13 7705 Lassen 2.5 mi. east of Beckworth Pass 1500 Comment
  CHSC21230  Menyanthes trifoliata Robert A. Schlising 1974-6-20 3146 Lassen Murrers Upper Meadow, about 2.5 miles east of Eagle Lake Field Station, on the east side of Eagle Lake. Comment
  NY1084278  Mertensia oblongifolia M. J. Williams 1986-5-14 86- 39 --1 Lassen 1.5 rd mi W of turn to Dodge Reservoir, on rd from Tuledad Canyon to Ravendale. 1706.9 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
  CAS-BOT-BC429081  Micranthes odontoloma Alice Eastwood 1912-8-22 1861 Lassen Trail from Morgans Springs to Lassen Butte Comment
  RSA14498  Microseris laciniata subsp. laciniata Elmer I. Applegate 1929-6-24 5879 Lassen Big Valley, near Bieber Comment
  CHSC117189  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. 1397 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
  CHSC66254  Microsteris gracilis Vernon H. Oswald; Lowell Ahart 1996-6-24 7844 Lassen Papoose Meadows locaed ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau, Montane Meadow. 1633 Comment
  SEINET10902895  Microsteris gracilis Mary Susan Taylor 1974-5-4 Taylor 227 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  CHSC65360  Mimetanthe pilosa Vernon H. Oswald; Lowell Ahart 1995-8-14 7195 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittent stream, N of Susanville. 1676 Comment
  UC1063535  Mimulus breweri A. Simontacchi 1940-5-28 786 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC117277  Mimulus guttatus Lowell Ahart; John Dittes 2016-7-15 21224 Lassen On the west side of the road about 600 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1012180  Mimulus guttatus Francis W. Pennell 1940-6-10 25778 Lassen 3 mi e Westwood (Route 36) 1584 Comment
  JEPS94552  Mimulus lewisii Vernon Oswald and Lowell Ahart 1997-6-24 8616 Lassen 0.7 mi e of boundary of Lassen National Forest (5.4 mi e of Gold Run Road (29N10), s of Susanville, on n side of Diamond Mountain along Forest Road 29N43); Diamond Mountain along Forest Road 29N43 1889 Comment
  SEINET10962495  Mimulus mephiticus Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 882 Lassen Collected 3 mi n of milford. On hwy 395 at honey lake campgrounds. Comment
  JEPS10491  Mimulus microphyllus Jos. Grinnell 1928-6-16 Lassen Eagle Lake 1584 Comment
  UC27054  Mimulus moniliformis M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  HSC63954  Mimulus nanus var. mephiticus Teresa Prendusi 1980-7-1 Lassen Champ's Flat 1707 Comment
  LA38975  Mimulus nanus var. mephiticus Frank W. Peirson; 1926-6-24 6853 Lassen Madeline Plain Comment
  RSA437621  Mimulus nanus var. mephiticus Barbara J. Ertter, Gary Schoolcraft 1987-6-16 7197 Lassen Skeedaddle Mountains on NE side of Honey Lake; saddle on E side of Hot Springs Peak. 2195 Comment
  RSA535802  Mimulus nanus var. mephiticus David M. Thompson 1988-6-1 923 Lassen 2.7 mi NW of Milford along Hwy 395. 1250 Comment
  JEPS15594  Mimulus nanus var. nanus Milo S. Baker 1893-7-5 Lassen Dixey Valley Comment
  RSA59745  Mimulus nanus var. nanus N. N. Thompson 1950-5-19 14786 Lassen 16.5 mi. W of Madeline on rd. from Adin. 1677 Comment
  RSA60367  Mimulus nanus var. nanus E. K. Balls 1950-5-9 15952 Lassen 6 miles south of Milford, Hwy 395. 1296 Comment
  UC1025076  Mimulus primuloides Leo Whitney 1933-8-14 1595 Lassen meadow near Slate Creek (ca 8 mi nw of Eagle Lake); Lassen National Forest 1920 Comment
  UC1736253  Mimulus suksdorfii Dean W. Taylor 1992-5-7 12547 Lassen Eagle Lake Region, Pine Creek, on Forest Road 33N07 ca. 0.8 mile S of Byrgess Flat, 1767 Comment
  CAS-BOT-BC10905  Mimulus suksdorfii Clarence Roy Quick 1962-6-17 62 -21 Lassen Blacks Mountain Experimental Forest Headquarters, USFS, south of Hall's Flat. 1615 Comment
  JEPS8121  Mimulus torreyi Brown and Wieslander 1922-7-28 10 Lassen near Martin Springs Comment
  UCD150408  Mirabilis laevis var. retrorsa William Anderson 1963-6-23 s.n. Lassen Wendel. Comment
  UC477503  Monardella glauca Geo. A. Fisher 1928-6-12 27 Lassen Lassen Forest 1615 Comment
  SEINET12319571  Monardella odoratissima J. D. Prouty 1978-1 33 Lassen NW side of Eagle L., Pine Creek just upstream of fish trap on S bank, T32N R10E Sec1 1561 Comment
  CHSC5272  Monardella odoratissima subsp. glauca J. B. Kimsey 1946-6-11 Lassen Pine Creek, near Eagle Lake. 1580 Comment
  LA54185  Monardella odoratissima subsp. glauca Carl Epling; William Robison 1935-7-15 sn Lassen Fredonyor Pass Comment
  CHSC23511  Monardella odoratissima subsp. pallida Wayne O. Baum 1971-7-12 71 -69 Lassen E. slope of Gallatin Peak. 2011 Comment
  CAS-BOT-BC213934  Monardella odoratissima subsp. pallida Margaret M. Hanna 1956-6-3 927 Lassen Highway 299, 2 mi. west of Nubeiber Comment
  SEINET12319572  Monardella villosa Unknown 1975-1 53 Lassen NW side of Coleman Lake, ca 32m from lake's edge, ca 10.6 km NE of Susanville 1921 Comment
  CHSC99530  Monolepis nuttalliana Lowell Ahart; John Dittes 2008-6-22 15034 Lassen On the banks of a small natural drainage, about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  UC1746003  Monolepis nuttalliana Annetta M. Carter 1945-9-30 1721 a Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  UCR244049  Monolepis pusilla Jim Andre 1993-6-1 19719 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CAS-BOT-BC444692  Montia chamissoi John Thomas Howell 1934-6-14 s.n. Lassen Near Lost Lake, Warner Mts. 2438 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
  JEPS87431  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
  UC1567410  Montia chamissoi G. Schoolcraft 1989-7-18 1983 Lassen near Buck's Spring (s of Clark's Valley Road) 1874 Comment
  CAS-BOT-BC444696  Montia chamissoi Louella Bass 1977-6-12 77 -3 Lassen Elysian Valley 1325 Comment
  RSA0011459  Montia chamissoi R. F. Thorne, Larry E. DeBuhr 1975-8-22 46979 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CHSC64892  Montia fontana subsp. chondrosperma Vernon H. Oswald 1995-6-26 6925 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 7.1 mi w of Madeline. Locally abundant, forming mats on wet rocks in a shallow, roadside streamlet. 1712 Comment
  CHSC54192  Montia linearis Vernon H. Oswald 1991-5-28 4619 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. Locally abundant on the bed of a drying vernal pool on an undulating sagebrush flat east of the barn. 1264 Comment
  CHSC68758  Montia linearis Vernon H. Oswald; Lowell Ahart 1997-5-27 8497 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. Common in moist gravel on the flood plain of a small creek paralleling the road. 1546 Comment
  RSA0035909  Montia linearis Lowell A. Ahart, John Dittes 2008-6-20 14938 Lassen About 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  RSA715990  Montia linearis L. Ahart, John Dittes 2005-6-2 11956 Lassen Along poor dirt road, 1 mile E of Anderson Ranch home, Long Valley, 4.5 miles air N of the intersection of Scott Road and Hwy 70, 6 miles NW of Hallelujah jct. 1426 Comment
  UC1776691  Muhlenbergia asperifolia G. Schoolcraft 1999-7-7 2854 Lassen about 9 miles NE of Ravendale - dune N of Horne Ranch Road 1621 Comment
  JEPS28263  Muhlenbergia richardsonis George W. Gillett 1957-7-22 871 Lassen s shore of lake Lassen Volcanic National Park, Snag Lake (margin of gravel bars) 1850 Comment
  UCD86899  Muhlenbergia richardsonis Beecher Crampton 1954-7-6 2073 Lassen 17 miles south of Ravendale, along US highway 395. 1524 Comment
  CAS-BOT-BC515651  Muilla transmontana G. Schoolcraft 1989-5-3 1863 Lassen NW corner of Secret Valley near Karlo Comment
  UC1126100  Myosurus apetalus A. Simontacchi 1940-5-21 761 Lassen 4.1 mi e Blacks Mountain; Lassen National Forest 1737 Comment
  UC1924589  Myosurus apetalus Debra Valov 2006-5-29 2006019 Lassen Bieber California, Lassen Co., Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  NY492641  Myosurus apetalus M. J. Williams 1986-5-14 8638- 3 Lassen Tuledad Canyon Road, from Duck Flat to Ravendale. 0.1 mile west of California-Nevada line. Comment
  CHSC112462  Myosurus minimus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18726 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
  CHSC54193  Myosurus minimus Vernon H. Oswald 1991-5-28 4621 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. On the beds of vernal pools east of the barn. 1264 Comment
  CHSC64893  Myosurus minimus Vernon H. Oswald; Lowell Ahart 1995-6-19 6895 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. 1383 Comment
  JEPS118444  Myosurus minimus Lowell Ahart, John Dittes 2011-6-21 17526 Lassen Along the bottom of a small drainage, about 30 yards north of the road, between Elkins Lane and Walters Road, about 100 yards south of the old barn, 500 feet south of Modoc County Line, about 4.3 miles (air) west-southwest of Adin, about 7.3 miles (air) northeast of Bieber, Big Valley 1268 Comment
  JEPS118467  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
  JEPS94606  Myosurus minimus Vernon H. Oswald and Lowell Ahart 1997-5-27 8518 Lassen on Forest Route 38N04 2.6 mi ne Hwy. 139 ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat)); Williams Reservoir 1682 Comment
  NY492693  Myosurus minimus P. H. Raven 1958-6-17 13285 Lassen Along U. S. Highway 395, 1.9 miles south of Ravendale Comment
  SEINET5338223  Myosurus minimus subsp. montanus N. H. Holmgren, P. K. Holmgren 1978-6-11 8913 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation peak, 28 Km (17.4 mi) east of Ravendale and 22.5 Km (14 mi) airline distance. 1676 Comment
  CHSC676  Myriophyllum sibiricum V. Holt 1946-7-12 Lassen Pine Creek Slough. 1584 Comment
  CHSC77218  Myriophyllum sibiricum G. Schoolcraft 1996-7-10 2532 Lassen Willow Creek- northeast of Susanville. 1432 Comment
  RSA233733  Myriophyllum sibiricum Robert F. Thorne, C. W. Tilforth 1969-9-5 39134 Lassen Said Valley Reservoir. Comment
  CDA36310  Myriophyllum sibiricum J. R. Keck Jr., D. L. Haws 1978-9-6 PDR# 330036 Lassen Eagle Lake; at the public boat ramp at Spaulding Resort. 0 Comment
  UC1101501  Myriophyllum sibiricum Verne Grant and Irving Schneider 1947-9-7 8398 Lassen Susan River by Highway 395 at Bridge 7-34, 1/2 mi W of Litchfield. Comment
  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
  UCD55269  Nama aretioides var. multiflora Ellen Dean 2006-5-15 3070 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. Northern part of Johnston property near sandy wash. 1247 Comment
  CHSC43311  Nama densa Lowell Ahart 1974-7-9 543 Lassen Along the edge of the road, near the wouth-west edge of Eagle Lake. 1584 Comment
  CHSC91296  Nama densa var. densa Lowell Ahart; John Dittes 2005-6-1 11908 A Lassen On the east side of Scott Road, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1460 Comment
  CHSC91324  Nama densa var. densa Lowell Ahart; John Dittes 2005-6-1 11874 Lassen On the south side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 1 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.7 miles (air) northwest of Hallelujah Junction. 1461 Comment
  UC735057  Nama densa var. parviflora Lincoln Constance 1946-7-3 3099 Lassen 7 mi n of Spaldings (northern edge of Eagle Lake); northern edge of Eagle Lake 1676 Comment
  RSA508616  Narthecium californicum Mrs. R. M. Austin 1880-8-3 s.n. Lassen Mount Dyer 1829 Comment
  RSA0011554  Navarretia R. F. Thorne, Larry E. DeBuhr 1975-8-22 46988 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CHSC4873  Navarretia breweri R. Carter 1967-6-23 543 Lassen Ca. 5 yds. off N side of road. Comment
  UC1184057  Navarretia breweri Jean Langenheim 1957-6-22 4365 Lassen Said Valley Reservoir, ne part of Lassen County Said Valley Reservoir Comment
  UC1283709  Navarretia breweri Beecher Crampton 1964-6-27 7099 Lassen ca 8 mi se Ravendale (Spanish Springs - Shinn Mtns Recreation area) 1981 Comment
  UC1609452  Navarretia breweri Vernon H. Oswald and Lowell Ahart 1993-6-14 5517 Lassen Eagle Lake rd (Lassen A1) ca 3 mi w Eagle Lake (0.5 mi sw of Spaulding Tract Rd (Rd 518, 33N89)) 1810 Comment
  UC604552  Navarretia breweri C. W. Sharsmith 1938-7-18 3638 Lassen 3 mi s Termo; Madeline Plains Comment
  HSC23507  Navarretia breweri W. Lessig 1967-7-1 11 Lassen 10 mi. N of Susanville on Hwy. 139 1829 Comment
  CHSC14175  Navarretia divaricata K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5806 Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  UCD32670  Navarretia intertexta Beecher Crampton 1954-7-6 2072 Lassen Lassen County, 17 miles south of Ravendale, along US highway 395. 1524 Comment
  JEPS121309  Navarretia intertexta subsp. intertexta Lowell Ahart, John Dittes 2013-7-22 18869 Lassen 10 yards S of the man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC23861  Navarretia intertexta subsp. propinqua A. W. Harvilik 1967-7-7 38 Lassen Collected on hwy. 139 ca. 6 mi from Susanville. 1463 Comment
  CHSC34347  Navarretia intertexta subsp. propinqua K. R. Stern 1974-6-26 5854 Lassen Ditch bank beside Railroad track, e side of Poison Lake Rd. to Pittville, 1.8 mi nw of intersection with Hwy. 44. Comment
  CHSC58847  Navarretia intertexta subsp. propinqua Vernon H. Oswald; Lowell Ahart 1992-7-16 5101 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. On bed of lake. White-flowered plants collected at McCoy Flat Reservoir. 1745 Comment
  UC1008717  Navarretia intertexta subsp. propinqua Laura E. Mills 1940-7-8 Lassen about 2 mi s Susanville; Sierra Nevada Mountains 1524 Comment
  UC1594648  Navarretia intertexta subsp. propinqua Vernon H. Oswald and Lowell Ahart 1992-7-16 5101 Lassen 1.2 mi se County Rd. A21 (Long Lake on the s of Hwy 44, between Old Station and Susanville); Long Lake 1745 Comment
  UC1594649  Navarretia intertexta subsp. propinqua Vernon H. Oswald and Lowell Ahart 1992-7-16 5111 Lassen s side Hwy. 44 (Bridge Creek entering McCoy Flat Reservoir, between Old Station and Susanville); McCoy Flat Reservoir, Bridge Creek 1691 Comment
  CHSC112444  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18778 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
  CHSC54188  Navarretia leucocephala subsp. minima Vernon H. Oswald 1991-5-28 4617 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. On the bed of vernal pools on a flat east of the barn. 1264 Comment
  JEPS88516  Navarretia leucocephala subsp. minima Vernon H. Oswald and Lowell Ahart 1996-6-24 7847 Lassen Papoose Meadows located ca. 0.5 mi. e. of Eagle lake Rd. (A1) and 2.5 mi. s. of Eagle Lake (on w. side of the meadow just s. of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  POM75594  Navarretia leucocephala subsp. minima Marcus E. Jones 1897-6-18 10107 Lassen Chat. 1524 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
  UC23681  Navarretia leucocephala subsp. minima J. Burtt Davy Jun 17 1897-Jun 24 1897 3362 Lassen Honey Lake Valley Comment
  SEINET2440302  Navarretia linearifolia subsp. linearifolia Leigh A. Johnson 2005-7-28 05 -220 Lassen Lassen Natl. Forest, NE Long Lake vicinity. Off Hwy 44 at mile marker 20.74. Along 31N01 leading to NE edge of lake.; 0 1712 Comment
  UC1137723  Navarretia linearifolia subsp. linearifolia L. R. Short and Wm. Gansberg 1936-7-3 S- 472 Lassen Burgess Spr. Exp. Range Lassen National Forest 1844 Comment
  UC1143039  Navarretia linearifolia subsp. linearifolia L. R. Short and Wm. Gansberg 1936-7-3 S- 472 Lassen Burgess Spr. Exp. Range Lassen National Forest 1844 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
  SEINET200214  Navarretia minima C. MIcMillan 1949-6-15 1542 Lassen 5 miles W of Bleber. Comment
  JEPS120028  Navarretia propinqua Lowell Ahart, John Dittes 2012-7-9 18303 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
  SEINET14160494  Navarretia sinistra D. W. Taylor 2012-7-18 21281 Lassen Cascade Ranges, Windmill Flat (9tributary Juniper Creek, Pit River watershed, 11 miles S of Adin), Letterbox Hill. 1707 Comment
  SBBG22467  Nemacladus capillaris C. B. Hardham 1961-6-16 7450 Lassen Gold Run Crk, S of Susanville Comment
  POM68111  Nemacladus sigmoideus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  UC606944  Nemophila parviflora var. austiniae L. Constance 1938-6-10 2324 Lassen 0.5 mi w Fredonyer Pass (junction of Crazy Harry and Westwood--Susanville Roads); w of Fredonyer Pass 1676 Comment
  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
  JEPS1932  Nemophila pedunculata L. Constance 1938-6-10 2323 Lassen 2.6 mi sw Fredonyer Pass (McKenzie Meadows at Coppervale Ranger Station, Chester--Susanville Road); McKenzie Meadows, sw of Fredonyer Pass 1524 Comment
  NY1082721  Nemophila pedunculata N. H. Holmgren 1978-6-11 8911 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
  UC1069207  Nemophila pedunculata A. Simontacchi 1940-5-21 759 Lassen 4.1 mi sse Blacks Mtn; Halls Flat Quad., Lassen National Forest, sse of Blacks Mtn Comment
  CHSC67175  Nestotus stenophyllus James D. Jokerst 1991-5-29 3305 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, top of plateau E of N basin, W of N-S oriented dirt road. 1737 Comment
  CHSC31980  Nicotiana attenuata L. Ahart 1974-7-9 544 Lassen Along Hwy 395, 1 mi n of jct Hwy 70 and Hwy 395. 1524 Comment
  CHSC55804  Nicotiana attenuata Vernon H. Oswald 1991-9-23 4875 Lassen Lassen Volcanic Park. Butte Lake in the northeast corner of the park. Collected on the strand of the lake at its outlet; along the east side of the lake. 1841 Comment
  CHSC65161  Nicotiana attenuata Vernon H. Oswald; Lowell Ahart 1995-7-5 6960 Lassen Modoc Plateau. North of Honey Lake at Bull Flat on Smoke Creek Ranch Rd., 10.3 mi e of Hwy 395. At roadside. 1432 Comment
  HSC21264  Nicotiana attenuata R. G. Means 1962-7-4 67 Lassen 7 mi. N of Susanville, Hwy. 139 1585 Comment
  CHSC71124  Nothocalais troximoides Vernon H. Oswald; Lowell Ahart 1998-5-22 9097 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
  JEPS103174  Nothocalais troximoides G. Schoolcraft 1993-6-10 2295 Lassen S. 3of CR. 512, S. of Red Rock Lake 1828 Comment
  UCD134648  Nothocalais troximoides G. Schoolcraft 1993-6-10 2295 Lassen South of CR. 512, south of Red Rock Lake. 1828 Comment
  UCD50215  Nymphaea odorata subsp. tuberosa Daniel B. Marcum 2004-6-1 s.n. Lassen Near warm spring in the Fall River Valley, Lassen County. 1005 Comment
  JEPS124825 Image available Oenothera deltoides C. Meek 1969-7-8 68 Lassen Along Hi #395, 1 mi south of intersection to Herlong Army Depot, 8 mi. south of Milford. Comment
  JEPS94105  Oenothera deltoides subsp. piperi Vernon H. Oswald and Lowell Ahart 1998-5-22 9095 Lassen Hwy. 395 at an intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  UC107611  Oenothera deltoides subsp. piperi T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  RSA8247  Oenothera flava Elmer I. Applegate 1929-6-24 5881 Lassen Big Valley south of Bieber Comment
  RSA0049672  Olsynium douglasii var. douglasii Dean Wm. Taylor 2012-5-15 21194 Lassen WindMill Flat vicinity; one mile north of the north end 1676 Comment
  CAS-BOT-BC349945  Onopordum acanthium O. Havens 1963-8-9 s.n. Lassen P. S. Hall ranch, Doyle Comment
  SEINET230278  Orobanche corymbosa Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9509 Lassen Observation Peak south side of mountain 18 km (11mi) airline distance east of Ravendale. 1890 Comment
  JEPS70105  Orobanche corymbosa subsp. corymbosa L. Maynard Moe 1969-8-4 103 Lassen About 1 mile north of Litchfield on U. S. Highway 395. Comment
  CAS-BOT-BC499907  Orobanche fasciculata R. J. Dobbs 1928-5-23 s.n. Lassen Strawberry Pek switchback 1219 Comment
  JEPS22322  Orobanche uniflora subsp. occidentalis Peter H. Raven and Otto T. Solbrig 1958-6-16 13251 Lassen 4.5 miles east of Westwood on State Highway 36. Comment
  CAS-BOT-BC266614  Orthocarpus cuspidatus Lassen 1927 G. S. Crew 1927-7-15 66 Lassen 1 mile W Bogard Ranger Station 1737 Comment
  HSC63830  Orthocarpus cuspidatus subsp. cryptanthus Teresa Prendusi 1980-7-8 Lassen Grasshopper Ridge, 37 mi. N of Susanville off Hwy. 139, 5 mi. E of Grasshopper Valley 1738 Comment
  POM44256  Orthocarpus hispidus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  UCD39135  Orthocarpus luteus Beecher Crampton 1964-6-26 7085 Lassen 35 miles n.w. Susanville, Gray's Valley, 3 miles north Bogard Ranger Station. Comment
  HSC69075  Osmorhiza occidentalis Gary Schoolcraft 1980-7-29 342 Lassen Widow Peak Area 1585 Comment
  POM82799  Osmorhiza occidentalis Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  JEPS25526  Packera multilobata Rimo Bacigalupi with Lincoln Constance 1959-6-16 7139 Lassen beside U.S. Highway 395 one fourth mi s of junction of road to Smoke Creek 1341 Comment
  CHSC93246  Packera streptanthifolia John Dittes; Scott Chamberlain 2004-6-28 1011 Lassen Modoc Plateau; Long Valley; ca. 2.0 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1448 Comment
  UC35992  Packera subnuda M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC10426  Paeonia brownii 1927-7-1 47 Lassen Bogard R.S. pasture, Lassen Forest 1712 Comment
  SEINET10537847  Paeonia brownii Mary Susan Taylor 1982-8-27 Taylor 5053 Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  SEINET10537860  Paeonia brownii Paul Gallian, David B. Dunn 1971-6-2 Gallian 503 Lassen 6 mi n of hallelujah hct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  UC1131606  Panicum capillare H. S. Yates 1936-8-11 6073 Lassen Baxter Creek Susanville Quad., Baxter Creek Comment
  SEINET223918  Panicum capillare subsp. capillare Arnold Tiehm 1980-5-29 5759 Lassen Amedee Hot Springs Comment
  UC1101564  Paspalum distichum Malcolm A. Nobs and S. Galen Smith 1949-8-20 1479 Lassen 1 mi n Doyle (banks of Long Creek); Honey Lake Valley, banks of Long Creek Comment
  CHSC77180  Pastinaca sativa G. Schoolcraft 1992-6-18 2242 Lassen About 1.8 miles east of Susanville on A27. 1261 Comment
  JEPS10720  Pedicularis attollens Brown and Wieslander 1922-7-23 29 Lassen Martin Springs; Eagle Lake Comment
  SBBG68675  Pedicularis attollens S. W. Hutchinson -Jun-1925 1092 Lassen Eagle Lake 1554 Comment
  SBBG7089  Pedicularis attollens H. and M. Dearing 1938-7-1 2238 Lassen 12 mi W of Susanville Comment
  SD6612  Pedicularis attollens Mrs. R. M. Austin 1882-8-9 Lassen Kings Valley Comment
  CAS-BOT-BC266654  Pedicularis centranthera G. Schoolcraft 1989-5-3 1862 Lassen NW corner of Secret Valley Comment
  CHSC68879  Pedicularis groenlandica Vernon Oswald; Lowell Ahart 1997-6-24 8652 Lassen South of Susanville just south of small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  JEPS94553  Pedicularis groenlandica Vernon Oswald and Lowell Ahart 1997-6-24 8652 Lassen s of Susanville (just s of the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  JEPS3332  Pedicularis groenlandica George Gillett 1952-7-29 119 Lassen w slopes of Paradise Meadow; Lassen Volcanic National Park 2148 Comment
  CHSC5899  Pedicularis semibarbata P. Balch 1955-7-20 Lassen Eagle Lake. 5 mi from Antelope Lookout. 2072 Comment
  UC773852  Pedicularis semibarbata L. R. Short, J. Warren 1936-6-9 S 410 Lassen Burgess Spring Experiment Range Lassen National Forest 1859 Comment
  UC62506  Pellaea Baker and Nutting 1894-5-25 Lassen Pine Creek Comment
  SBBG66504  Penstemon deustus S. W. Hutchinson -Jun-1925 1075 Lassen Eagle Lake 1554 Comment
  SBBG85835  Penstemon deustus F. W. Pennell 1940-6-9 25768 Lassen below basaltic ridge, hill W of Susanville 1371 Comment
  CHSC5900  Penstemon deustus var. pedicellatus W. Vinyard 1946-6-10 Lassen Eagle Lake. Pelican Point. 1554 Comment
  JEPS11227  Penstemon deustus var. pedicellatus Jos. Grinnell 1928-6-18 Lassen Eagle Lake 1584 Comment
  NY591825  Penstemon deustus var. pedicellatus F. W. Pennell 1940-6-7 25722 Lassen Route 299, 11 miles west of Nubieber 1097.3 Comment
  SEINET5326740 Image available Penstemon deustus var. pedicellatus G. Schoolcraft 1993-6-29 2309 Lassen Ash Valley RNA between Adin & Madeline, CA 1585 Comment
  CHSC14190  Penstemon gracilentus M. S. Taylor 1974-7-10 276 Lassen Abundant in meadow ca. 2 mi e of Gallatin Beach, ca. 1/2 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC5912  Penstemon gracilentus R. Gein 1946-6-24 Lassen McCoy Flat. Eagle Lake. 1645 Comment
  CHSC80282  Penstemon gracilentus Jeanne Boze 1981-6-11 103 Lassen About 5 m from road, along Horse Lake Road, 5.5 mi from Hwy 139. 1676 Comment
  NY600695  Penstemon gracilentus G. H. True Jr. 1938-7-14 959 Lassen Summit on Milford Grade, just on north slope 1676.4 Comment
  NY600703  Penstemon gracilentus G. Schoolcraft 1990-7-9 2109 Lassen East slope of Tule Mountains 1770 Comment
  RSA408033  Penstemon gracilentus Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  UC506922  Penstemon gracilentus George A. Fischer, Irwin H. Johnson 1933-7-14 F 254 Lassen Lassen Forest 1783 Comment
  UC1874751  Penstemon gracilentus Karl Vincent, Charlotte Labbe 1986-7-19 4382 Lassen Sierra Nevada, Roop Mtn.; Alng CA A1 at Eagle Lake Summit, ca. 7.6 mi N of jct. CA 36, ca 7 air mi NW of Susanville. 1932 Comment
  CHSC68882  Penstemon janishiae Vernon Oswald; Lowell Ahart 1997-6-24 8644 Lassen South of Susanville near the small pool on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  NY627262  Penstemon neotericus A. A. Heller 1938-6-22 15181 Lassen 1 mile south of Westwood Comment
  NY627264  Penstemon neotericus J. T. Howell 1973-7-10 49758 Lassen Near Westwood, Sierra Nevada 1554.5 Comment
  POM195120  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen 2 miles east of Westwood. 1494 Comment
  SEINET11262116  Penstemon neotericus Karl A. Vincent 1987-8-5 4499 Lassen Sierra Nevada, Roop Mtn. Along CA A1 ca 4 mi NW of jct CA 36, site ca 6 air mi WNW of Susanville.; 0 1737 Comment
  NY627268  Penstemon neotericus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  POM147859  Penstemon neotericus J. B. Feudge 1927-7-20 1768 Lassen Westwood. Comment
  SBBG28997  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen E of Westwood 1493 Comment
  SEINET5329199 Image available Penstemon neotericus J. T. Howell 1973-7-10 49758 Lassen near Westwood 1554 Comment
  UC27480  Penstemon newberryi var. newberryi Milo S. Baker 1891-6 Lassen Silver Lake Comment
  CHSC68883  Penstemon roezlii Vernon Oswald; Lowell Ahart 1997-6-24 8623 .1 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
  UC690327  Penstemon roezlii John Thomas Howell 1934-6-10 11877 Lassen on road to Horse Lake 12 mi n Susanville; n of Susanville on road to Horse Lake Comment
  JEPS128128  Penstemon rydbergii Catherine Bauer with Ellen Bauer Benson 2017-8-18 25 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  HSC81544  Penstemon rydbergii var. oreocharis Thomas W. Nelson, Jane Nelson 1980-7-6 6046 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  POM252930  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen About 3 miles east of Westwood. 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
  UC696713  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen about 4 mi e Westwood; e of Westwood 1432 Comment
  CHSC12411  Penstemon speciosus Lynn R. Thomas 1969-6-20 135 Lassen Just above Deans Meadow, ca. 6 mi. s of E. L. B. S. 2011 Comment
  CHSC12458  Penstemon speciosus Robert W. Severin 1969-6-20 2 Lassen 4 miles s of E. L. B. S. in Dean's Meadow. 1950 Comment
  CHSC4438  Penstemon speciosus K. R. Stern 1967-6-30 2449 Lassen West Central side of Eagle Lake. 1554 Comment
  CHSC5916  Penstemon speciosus J. B. Kimsey 1946-6-10 Lassen Eagle Lake. 1554 Comment
  NY661010  Penstemon speciosus L. Constance 1938-6-11 2331 Lassen 3.5 miles north of Secret Valley, Madeline Plains on Susanville-Alturas road 1524.0 Comment
  POM195125  Penstemon speciosus D. D. Keck 1930-7-23 950 Lassen Susanville. 1280 Comment
  POM44291  Penstemon speciosus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  NY660820  Penstemon speciosus H. D. D. Ripley 1943-6-13 5672 Lassen South of Constantia 1463.0 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-BC243408  Penstemon sudans David D. Keck 1930-7-23 953 Lassen Four miles west of Susanville, Sierra Nevada 1463 Comment
  CHSC66408  Penstemon sudans Vernon H. Oswald 1996-6-17 7781 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
  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
  NY661802  Penstemon sudans W. W. Eggleston 1911-7-7 7177 Lassen Secret Valley 1330 Comment
  NY661806  Penstemon sudans J. T. Howell 1976-7-20 52014 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432.6 Comment
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Apr 21 2013
  NY661808  Penstemon sudans D. D. Keck 1935-6-25 3756 Lassen Susanville; just west of town Comment
  UC886952  Penstemon sudans A. A. Heller 1938-6-22 15194 Lassen on Highway #36 on a stony slope e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  SEINET5323637 Image available Penstemon sudans G. Schoolcraft 1998-7-14 2761 Lassen In rimrock NE of Shaffer Mtn 1356 Comment
  CAS-BOT-BC140468  Peraphyllum ramosissimum James Moffitt 1941-5-14 s.n. Lassen Near Gilman Springs, 6 miles ssw. of Karlo 1417 Comment
  CDA26041  Peraphyllum ramosissimum T. C. Fuller, R. C. Bechtel, R. Bradley 1981-7-9 20382 Lassen On slope above the west side of Smoke Creek Reservoir. 0 Comment
  UC1087229  Perideridia bolanderi subsp. bolanderi Peter H. Raven and Otto T. Solbrig 1958-6-16 13252 Lassen 4.5 mi e Westwood Comment
  UC1137731  Perideridia bolanderi subsp. bolanderi L. R. Short and J. Warren 1936-6-23 S- 449 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1761 Comment
  SEINET10545980  Perideridia bolanderi subsp. bolanderi Paul Gallian, David B. Dunn 1971-6-2 Gallian 464 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  HSC73083  Perideridia gairdneri subsp. gairdneri Cindy Prouty 1978-7-11 19 Lassen Papoose Creek, S of Gallatin 1585 Comment
  HSC103609  Perideridia parishii Thomas W. Nelson, Jane Nelson 1985-8-10 8003 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC423339  Peritoma platycarpa Noel H. Holmgren; Patricia K. Holmgren 1978-6-11 8928 Lassen Upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale. 1700 Comment
  CAS-BOT-BC423343  Peritoma platycarpa A. A. Heller 1938-6-23 15207 Lassen On the grade east of Litchfield, on U. S. Highway #395 1371 Comment
  CAS-BOT-BC419144  Persicaria maculosa Luella Bass 1980-8-29 s.n. Lassen Standish Comment
  RSA38635  Phacelia adenophora P. A. Munz 1947-5-19 11881 Lassen Madeline 1677 Comment
  RSA722579  Phacelia adenophora R. R. Halse 1975-6-20 1198 Lassen Madeline Plains, along Lassen County Road 508, 1.5 miles east of Termo. 1590 Comment
  UC708799  Phacelia adenophora Vesta Holt 1946-6-20 4 Lassen Grasshopper Valley Comment
  UC1609410  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  JEPS118499  Phacelia hastata A. Holmen 2011-8-23 CA 320 -94 Lassen South US Hwy 295 to Termo and turn left onto Lassen Co. Rd 508 (Juniper Ridge Rd). Follow this road for 11 miles to Cold Springs Rd and head north for 3.3 miles. Turn left and travel 1.5 miles. Collection site will be to the west heading up draw. Comment
  SJSU14069  Phacelia heterophylla subsp. virgata W. Savage 1964-6-30 335 Lassen E of Susanville 1310 Comment
  CHSC80207  Phacelia humilis Jeanne Boze 1981-6-13 113 Lassen On northeast slope of Gallatin Peak. 2011 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
  NY1057845  Phacelia humilis B. J. Ertter 1987-6-16 7196 Lassen Skeedaddle Mountains on northeast side of Honey Lake; saddle on east side of Hot Springs Peak 2195 Comment
  UC1069416  Phacelia humilis A. Simontacchi 1940-5-17 751 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quadrangle 1699 Comment
  UC24376  Phacelia humilis M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC773945  Phacelia humilis L. R. Short 1936-5-22 S- 351 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1836 Comment
  SEINET10497016  Phacelia humilis Mary Susan Taylor 1974-1 Taylor 266 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA201834  Phacelia humilis var. humilis Jack Major 1966-6-24 s.n. Lassen Above Blue Lake, Warner Mountains, Modoc National Forest, northeastern part of the county (ca. 18 miles airline southeast of Likely). 1905 Comment
  CAS-BOT-BC145034  Phacelia inundata John Thomas Howell 1934-7-8 12510 Lassen Spaldings resort, Eagle Lake Comment
  CHSC59551  Phacelia linearis Mary Meyer 1980-5-20 Lassen Common along ridges above Secret Creek. 1432 Comment
  CHSC67059  Phacelia linearis Willis Ball 1969-6-28 55 Lassen Found on E.L.B.S. in dry basaltic soil. 1554 Comment
  CHSC71090  Phacelia linearis Vernon H. Oswald; Lowell Ahart 1998-5-22 9106 Lassen Road to ORV parking area in Fort Sage Mtns. 0.5 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. 1371 Comment
  CHSC726  Phacelia linearis F. Hughes 1935-6-2 Lassen Near Susanville. 1524 Comment
  GMDRC7731  Phacelia linearis J. M. Andre, G. Clifton 1993-6-1 33407 Lassen Modoc Plateau: along US Hwy 395, approx. 30 mi. NE of Susanville, north end of Secret Valley, SE end of Snowstorm Mtn, about 15 mi. SSE of Ravendale 1375 Comment
  SD6842  Phacelia linearis Mrs. R. M. Austin 1879-1 Lassen Eagle Lake Comment
  CDA40405  Phacelia linearis T. C. Fuller 1963-6-1 10637 Lassen Road to Willow Springs Campground, 2.0 miles east of Pittville-Susanville Road, 11.3 miles (road) south of Pittville. 0 Comment
  NY1056499  Phacelia lutea var. lutea M. J. Williams 1986-5-12 86- 21 --1 Lassen Smoke Creek Road, east of Highway 395 1448 Comment
  UC24457  Phacelia ramosissima var. eremophila Milo S. Baker 1894-7-25 Lassen Eagle Lake 1524 Comment
  SJSU14072  Phacelia thermalis W. Savage 1964-6-30 338 Lassen by Hwy 338, 11 mi N of Susanville Comment
  RSA40730  Phacelia thermalis C. L. Hitchcock 1940-5-26 6641 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  RSA74152  Phacelia thermalis J. T. Howell 1934-6-16 12222 Lassen Bieber Comment
  CHSC7695  Phalaris arundinacea Beverley J. Wise 1969-6-4 135 Lassen 2 mi. east of Susanville on Las. Co. Rd. 215. 1310 Comment
  UCD88538  Phalaris arundinacea R. Tofsrud 1951-7-13 s.n. Lassen Near Susanville. Comment
  CAS-BOT-BC253549  Phleum alpinum G. Schoolcraft 1997-8-6 2668 Lassen Diamond Mtn. 2316 Comment
  UC1037092  Phleum pratense Leo Whitney 1933-7-1 2214 Lassen ca 15 mi w Eagle Lake (Crater Mountain); Lassen National Forest, w of Eagle Lake, Crater Mountain 2225 Comment
  UC1100415  Phleum pratense Herbert L. Mason and Verne Grant 1947-7-9 13303 Lassen 5 mi e Bieber (irrigation ditch) Comment
  UC1567400  Phleum pratense G. Schoolcraft 1989-7-18 1979 Lassen near Bucks Spring (s of Clarks Valley Road); near Buck's Spring 1874 Comment
  CAS-BOT-BC232853  Phlox A. M. Vollmer; L. Beane 1953-7-1 55 Lassen Along Halls Flat road, beginning 6 miles W of Susanville to McArthur 1554 Comment
  RSA0068847  Phlox Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  JEPS69974  Phlox diffusa Frances D. Payne 1929-7-12 76 Lassen above Lost Lake (se extremity of Warner Mountains); Warner Mountains 2286 Comment
  SEINET10496851  Phlox diffusa Mary Susan Taylor 1982-5-7 Taylor 4430 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
  UC1137763  Phlox gracilis August L. Hormay 1934-5-9 Lassen Black Mt. Headquarters Lassen National Forest 1706 Comment
  UC773891  Phlox gracilis L. R. Short and Wm. Gansberg 1936-6-2 S- 363 Lassen Burgess Spring Experimental Range Lassen Forest 1859 Comment
  CHSC54189  Phlox hoodii subsp. canescens Vernon H. Oswald 1991-5-28 4626 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  UC1924596  Phlox speciosa Debra Valov 2006-5-28 2006006 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1305 Comment
  CAS-BOT-BC294732  Phlox speciosa James Vale 1981-5-24 s.n. Lassen Eagle Lake Comment
  CHSC1306  Phlox speciosa subsp. occidentalis M. Anthony 1953-4-27 Lassen Susanville. 1280 Comment
  RSA551342  Phlox speciosa subsp. occidentalis J. T. Howell, Gordon H. True, Margaret Williams 1973-5-12 49155 Lassen In cemetary, Janesville 1296 Comment
  NY963725  Phlox speciosa var. nitida H. D. D. Ripley 1944-5-29 5955 Lassen South of Janesville 1280 Comment
  CHSC106582  Phlox stansburyi C. Dow; D. Rojas 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  UC106966  Phlox stansburyi T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  SEINET247771  Phoenicaulis cheiranthoides Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9515 Lassen Observation Peak, near the top of the mountain, 17 km (10.5 mi) air distance east of Ravendale. 2420 Comment
  CAS-BOT-BC250984  Phragmites australis G. Schoolcraft 1996-9-11 2581 Lassen Lower end of Willow Creek near Belfast 1341 Comment
  UC1132473  Phragmites australis H. S. Yates 1936-8-11 6063 Lassen near Red Rock; Sierraville Quad. Comment
  UC769862  Phragmites australis R. F. Hoover 1940-10-11 4682 Lassen s Doyle; Long Valley Comment
  UC74048  Picrothamnus desertorum J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley, Amedee Comment
  HSC26251  Pinus jeffreyi W. A. Heaton 1965-5-8 32 Lassen Near Fredonyer Pass on Hwy. 36 W of Susanville, Bulk Collection 45 Comment
  SEINET12429009  Pinus monophylla var. californiarum D. Charlet, P. Herman 1995-3-6 2192 Lassen Diamond Mountains, 10 kn ESE of Adams Peak; W side Long Valley, NW of Petersen Mtn. on little ridgetop visible from US 395, below railroad above windmill; 1408 Comment
  CHSC60823  Plagiobothrys cognatus Vernon H. Oswald; Lowell Ahart 1993-6-28 5626 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. On the bed of a branch of Pine Creek. 1737 Comment
  JEPS28716  Plagiobothrys cognatus George W. Gillett 1957-7-29 954 Lassen Snag Lake Lassen Volcanic National Park (shoreline near e inlet) 1850 Comment
  JEPS127274  Plagiobothrys cusickii Lowell Ahart, John Dittes 2016-7-13 21114 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
  RSA0039528  Plagiobothrys cusickii Lowell A. Ahart, John Dittes 2012-7-9 18284 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  SJSU8065  Plagiobothrys hispidus J. W. Tilden 1960-6-27 1495 Lassen Westwood 1524 Comment
  CHSC64872  Plagiobothrys leptocladus Vernon H. Oswald; Lowell Ahart 1995-6-19 6896 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. 1383 Comment
  UC1191065  Plagiobothrys mollis Robert Ornduff 1959-7-18 5060 Lassen 1 mi e Madeline (on road from Madeline to the Patterson Ranger Station); Modoc National Forest Comment
  UC1523740  Plagiobothrys mollis Gary Schoolcraft 1981-8-11 559 Lassen Silva Flat Reservoir 1706 Comment
  JEPS124380  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2015-7-13 20306 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  RSA39738  Plagiobothrys scouleri var. hispidulus P. A. Munz 1947-5-20 11891 Lassen Milford. 1265 Comment
  CHSC117214  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2016-6-7 20978 Lassen Strand of the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  RSA0017432  Plantago lanceolata Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC1037280  Platanthera leucostachys Leo Whitney 1934-7-25 1740 Lassen ca 7 to 8 mi sw Eagle Lake (Bridge Creek Camp, near Bridge Creek); Lassen National forest, Bridge Creek 1737 Comment
  CHSC64854  Plectritis macrocera Vernon H. Oswald 1995-6-26 6942 Lassen Modoc Plateau. Spooner Rd. ca. 0.3-0.4 mi e of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  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
  SEINET8658736  Plectritis macrocera C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  CAS-BOT-BC261046  Poa Clarence R. Quick 1961-6-21 61 -30 Lassen Adjacent to Road 21, Blacks Mountain Experimental Forest northeast of Lassen Peak 1798 Comment
  RSA273386  Poa J. P. Smith, J. O. Sawyer 1971-5-22 4655 Lassen 4 miles west of Susanville on State Route 44. Comment
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May 9 2012
  CHSC112468  Poa bulbosa subsp. vivipara Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18748 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
  RSA115224  Poa compressa Beecher Crampton 1956-7-17 3736 Lassen Ca. 2.5 miles north of Emigrant Gap. 1372 Comment
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Apr 28 2013
  RSA719872  Poa compressa M. A. Vincent, K. Levings 2006-7-29 12903 Lassen Along Rte. 36, 14.3 miles west of Susanville Comment
  UCD37475  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen Lassen County, 6 miles southeast of Jess Valley, 3 miles east of Blue Lake, southern Warner Mountains. 2133 Comment
  JEPS120878  Poa cusickii subsp. cusickii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18780 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
  UC1024837  Poa cusickii subsp. cusickii Leo Whitney 1935-6-10 3219 Lassen Camp 10 Fruit Grower's Supply Company Comment
  HSC95195  Poa leptocoma subsp. leptocoma Gordon Leppig, J. Cromwell 1997-7-27 629 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  UCD91956  Poa pratensis R. Tofsrud 1947-7-24 213 Lassen 13 miles E of Madeline. Comment
  UC1142958  Poa pratensis subsp. pratensis A. L. Hormay 1941-6-25 31 Lassen Westwood Junction; Lassen Nat'l Forest 1737 Comment
  JEPS128168  Poa secunda M. C. Mahoney, J. A. Nash 2017-7-12 CA 350 -82 Lassen On Mt. Schaffer. From Susanville take A27 east. Turn left on Belfast Road. Continue for 5 miles and turn right onto a dirt road. Follow for two miles until it dead ends at Balls Canyon. Population is on he east side of the canyon on Mt. Schaffer. Comment
  JEPS85786  Poa secunda Roy E. Buck and Robert A. Price 1988-6-26 1027 Lassen ca 30 air km nne Susanville (Fredonyer Peak, on subsidiary peak ca 0.5 air km n of main summit) 2377 Comment
  POM203054  Poa secunda J. T. Howell 1934-7-6 12459 Lassen Harvey Valley Comment
  RSA101643  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
  RSA647525  Poa secunda Marion P. Harthill 1972-6-17 824 Lassen Madeline. 1677 Comment
  SEINET175720 Image available Poa secunda Marcus E. Jones 1897-6-25 Lassen Susanville 1341 Comment
  UCR266833  Poa secunda G. B. Stabler 1922-7-9 s.n. Lassen Constantia [former settlement, in Long Valley 45 miles (72 km) southeast of Susanville] 1372 Comment
  CAS-BOT-BC236251  Poa secunda subsp. juncifolia John Thomas Howell 1934-6-14 12172 Lassen Near Lost Lake, Warner Mountains 2438 Comment
  CHSC100869  Poa secunda subsp. juncifolia L. P. Janeway 2008-8-2 9529 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Ranch Road 1.8 km west of the CA-NV line. 1349 Comment
  UC188907  Poa secunda subsp. juncifolia Milo S. Baker Lassen Dixie Valley Comment
  UC718008  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5456 Lassen 5 mi e Westwood (on rd to Fredonyer Pass); Sierra Nevada 1584 Comment
  UC718010  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5449 Lassen 1.5 mi w Susanville (rim of plateau overlooking Susan River canyon); Sierra Nevada 1341 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
  UCD92157  Poa secunda subsp. juncifolia A. A. Beetle; G. L. Stebbins Jr. 1942-5-29 3370 Lassen 5.2 miles E of Bieber, Big Valley. Comment
  UCD92381  Poa secunda subsp. juncifolia P. B. Kennedy 1901-6-10 s.n. Lassen Constantia. Comment
  UC1024824  Poa wheeleri Leo Whitney 1935-6-13 3240 Lassen Camp 10 Fruit Grower's Supply Company Comment
  UC1136985  Poa wheeleri L. R. Short 1936-4-28 S- 340 Lassen Burgess Spring Experimental Range; Lassen Forest 1767 Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  CHSC60907  Pogogyne floribunda Vernon H. Oswald; Lowell Ahart 1993-7-8 5675 Lassen N side of 34N12 just E of the railroad at Halls Flat Well, ca. 11 mi (air) NNW of Poison Lake. 1737 Comment
  UC1483864  Polemonium micranthum M. Meyer 1980-5-1 Lassen e Horse Lake Road (s of Ravendale); , e of Horse Lake Road 1645 Comment
  CAS-BOT-BC74166  Polyctenium fremontii H. D. Ripley; R. C. Barneby 1944-3-30 5970 Lassen South of Ravendale. 1691 Comment
  SEINET3562962 Image available Polyctenium fremontii Arnold Tiehm, Margaret Williams, Jan Nachlinger 1988-6-2 11703 Lassen 6.6 road miles north of the Wendel Road on highway 395 from Susanville to Alturas, mud flats along the highway. 1347 Comment
  SEINET12006546  Polyctenium fremontii C. C. Parry, Lemmon, J. G. 1878-1 s.n. Lassen Madeline Plains 2134 Comment
  SEINET229584  Polyctenium fremontii Gary Schoolcraft 1984-7-9 1287 Lassen On s. south of Fillman Road 3.8 miles west of Hwy 395. 1609 Comment
  NY406791  Polygala lasseniana A. A. Heller 1938-6-23 15213 Lassen South of Secret Valley. Comment
  SEINET3035191 Image available Polygala lasseniana A. A. Heller 1938-6-23 15213 Lassen South of Secret Valley. Comment
  RSA0004885  Polygala lasseniana A. A. Heller 1938-6-23 15213 Lassen South of Secret Valley. Comment
  UC1192333  Polygonum amphibium var. emersum Verne Grant and Irving Schneider 1947-7-30 8192 Lassen Tule Lake; s point of w embayment Comment
  UC1536795  Polygonum amphibium var. emersum Gordon H. True Jr. 1939-8-5 1041 Lassen near Madeline; Tule Reservoir Comment
  UC1537257  Polygonum amphibium var. emersum Gordon H. True 1936-6-22 514 Lassen Honey Lake Valley; deep slough 1219 Comment
  UC6641  Polygonum amphibium var. stipulaceum J. Burtt Davy Jun 17 1897-Jun 24 1897 3323 Lassen sloughs of Susan River Honey Lake Valley Comment
  CAS-BOT-BC419768  Polygonum argyrocoleon John Thomas Howell 1973-7-10 49763 Lassen Near Westwood 1554 Comment
  JEPS120904  Polygonum aviculare subsp. depressum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18735 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
  CHSC36980  Polygonum aviculare subsp. neglectum M. S. Taylor 1982-8-19 5021 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Junction. 1493 Comment
  CAS-BOT-BC414305  Polygonum aviculare subsp. neglectum M. S. Taylor 1982-8-19 5021 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallalujah [Hallelujah] Junction 1493 Comment
  UC1136194  Polygonum bistortoides Robert W. Gardner 1937-6-20 G- 20 Lassen Burgess Spring Halls Flat Quadrangle Comment
  CAS-BOT-BC414487  Polygonum douglasii G. Schoolcraft 1989-6-19 1918 Lassen Ash Valley RNA/ACEC Comment
  POM104508  Polygonum douglasii Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC1567355  Polygonum douglasii subsp. majus G. Schoolcraft 1989-6-19 1919 Lassen Ash Valley RNA/ACEC 1554 Comment
  CHSC105243  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  RSA128554  Polygonum hydropiper Peter H. Raven 1954-9-2 8115 Lassen Bed of St. Helena Creek at Mirabel Park, 4.8 miles S of Middletown Comment
  CHSC59096  Polygonum minimum Vernon H. Oswald; Lowell Ahart 1992-8-25 5178 Lassen Lassen Volcanic National Park. Cameron Meadow between Juniper and Snag Lakes. Locally abundant in an opening on the brushy edge of the meadow. 1950 Comment
  HSC31370  Polygonum minimum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19243 Lassen About 3 mi. N of Westwood Comment
  UC1603213  Polygonum polygaloides J. Guardino 1993-5-22 167 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CAS-BOT-BC419860  Polygonum polygaloides subsp. confertiflorum Malcom A. Nobs; S. Galen Smith; Herbert L. Mason 1949-5-29 757 Lassen On Great Northern Railroad, Highway 299, Nubeiber Comment
  CHSC110776  Polygonum polygaloides subsp. confertiflorum Dean Wm. Taylor 2012-7-18 21278 Lassen Cascade Ranges. Windmill Flat tributary Juniper Creek, Pit River Watershed, 11 miles S of Adin). 1706 Comment
  RSA0045637  Polygonum polygaloides subsp. confertiflorum Lowell Ahart, John Dittes 2008-6-22 15038 Lassen About 220 yards northwest of the road levee, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area,, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  UC1191311  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason Jul 29 1955-Jul 31 1955 14639 Lassen Pine Creek Flat Comment
  UC1258489  Polygonum polygaloides subsp. confertiflorum G. Schoolcraft 1980-7-10 299 Lassen along Rice Canyon Rd in grazing enclosure Bureau of Land Management 1548 Comment
  UC1258493  Polygonum polygaloides subsp. confertiflorum G. Schoolcraft 1980-7-16 313 B Lassen Nelson Corral Reservoir area; Bureau of Land Management 1804 Comment
  CHSC99128  Polygonum polygaloides subsp. kelloggii Lowell Ahart; John Dittes 2008-6-19 14897 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS87371  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald and Lowell Ahart 1993-8-3 5749 Lassen e Silver Lake (just e of Caribou Wilderness, ca 13 air mi n of Lake Almanor, e side of swamp); Cooper Swamp 1932 Comment
  UC1060646  Polygonum polygaloides subsp. kelloggii Herbert L. Mason 1957-7-5 14712 Lassen between Madeline and summit of grade; Madeline Plains Comment
  RSA122836  Polygonum sawatchense L. R. Short, J. Warren 1936-06 s 420 Lassen Burgess Spring, Exp Range. 1857 Comment
  RSA161483  Polygonum shastense Franklin Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  CAS-BOT-BC420976  Polygonum spergulariiforme Clare B. Hardham 1969-8-28 17432 Lassen Slope west of Janesville 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
  JEPS121244  Polypogon monspeliensis Lowell Ahart, John Dittes 2013-7-22 18874 Lassen 40 yards S of the man-made pond, about 110 yards N of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA129377  Polypogon monspeliensis H. S. Yates 1936-8-11 6054 Lassen Near Red Rock. 1341 Comment
  RSA719889  Polypogon monspeliensis Michael A. Vincent, K. Levings 2006-7-29 12915 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. Comment
  CHSC12484  Populus fremontii Carol Weld 1969-6-25 22 Lassen Murrer's Meadow. 1524 Comment
  POM107357  Populus trichocarpa Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  JEPS5602  Porterella carnosula G. S. Crew and C. S. Robinson 71 Lassen Feather Lake Lassen National Forest, Feather Lake (sw Lassen Co.) 1737 Comment
  UC130334  Porterella carnosula M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  UC1573183  Porterella carnosula Dean Wm. Taylor with Glenn L. Clifton, Rexford E. Palmer and Roy Buck 1988-6-6 9007 Lassen road from Bieber to Lookout 0.5 mi s Modoc County Line (Big Valley, Pit River Watershed); Pit River Watershed, Big Valley 1249 Comment
  HSC63956  Porterella carnosula Teresa Prendusi 1980-7-1 Lassen Champs Flat, ca. 8 mi. W of N end of Eagle Lake. 1677 Comment
  OBI75891  Porterella carnosula Anthony Baniaga and D. Lepley, D. Lepley 2011-8-17 502 Lassen Lassen Natl Forest. Unnamed ephemeral pool, E of Silver Bowl Camp. Bogard Buttes quad. T31N R7E sec 35 SW of SE 1905 Comment
  SEINET10460823  Porterella carnosula Nutting NUTTING s.n. Lassen Flat near Eagle Lake 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
  CHSC4837  Potamogeton R. Carter 1967-7-13 595 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  CHSC4839  Potamogeton R. Carter 1967-7-13 595 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  UC1099904  Potamogeton amplifolius Verne Grant, Irving Schneider 1947-8-24 8269 Lassen nw shore of Blue Lake (northern Lassen County) Comment
  UCD138219  Potamogeton amplifolius Gordon Leppig 1998-8-18 1064 Lassen Modoc National Forest; Blue Lake. Lake shore south of camp ground. 1859 Comment
  SEINET10704662  Potamogeton natans Karen M. Meyer, Andrew Townesmith 2007-7-21 Meyer 146 Lassen Lassen National Forest. 1.3 mi. on Road 10 to Silver Lake off Road 110. 1963 Comment
  UC1100072  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-9-6 8380 Lassen n arm of Eagle Lake Comment
  UC1100076  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-7-31 8201 Lassen sw of Madeline (George Williams' Ranch); Madeline Plan Comment
  SEINET3893473  Potamogeton pusillus Arnold Tiehm, Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line.; 0 1698 Comment
  CHSC55814  Potamogeton richardsonii Vernon H. Oswald 1991-9-23 4876 Lassen Lassen Volcanic National Park. Butte Lake in the northeast corner of the park. At the first spit of land extending into the lake south of its outlet. 1841 Comment
  RSA233761  Potamogeton richardsonii Robert F. Thorne, C. W. Tilforth 1969-9-5 39140 Lassen Said Valley Reservoir. 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
  CHSC27742  Potentilla glandulosa subsp. ashlandica N. E. Heiken 1978-7-5 76 Lassen S of Eagle L., E shore of Mahogany L. 2060 Comment
  CHSC99535  Potentilla gracilis var. fastigiata Lowell Ahart; John Dittes 2008-6-20 14954 Lassen In meadow, 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
  JEPS114356  Potentilla gracilis var. fastigiata Lowell Ahart, John Dittes 2008-6-20 14954 Lassen In meadow, 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
  NY832928  Potentilla gracilis var. fastigiata B. M. Bartholomew 1988-6-25 4373 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  UC1142924  Potentilla gracilis var. fastigiata A. L. Hormay 1941-6-23 11 Lassen Burgess Spring Lassen National Forest 1676 Comment
  CAS-BOT-BC540363  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-7 12461 Lassen Bogard Ranger Station Comment
  CAS-BOT-BC540368  Potentilla gracilis var. fastigiata David D. Keck 1930-7-23 956 b Lassen 3 miles east of Westwood 1524 Comment
  JEPS121267  Potentilla gracilis var. flabelliformis Lowell Ahart, John Dittes 2013-7-23 18899 Lassen Along a small drainage, W of the road levee, about 100 yards W of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC506926  Potentilla millefolia George A. Fischer and Irwin H. Johnson 1933-7-14 F. 240 Lassen Patterson R.S. Lassen National Forest, Patterson R.S. 1737 Comment
  CAS-BOT-BC144842  Potentilla rivalis Verne Grant; Irving Schneider 1947-8-1 8236 Lassen East end of Tule Lake Comment
  CHSC1581  Prunus andersonii D. Heinz 1962-4-23 Lassen Hallelujah Jct. at State line. 1371 Comment
  UC1128502  Prunus emarginata A. Simontacchi 1940-6-4 799 Lassen 7.1 mi sw of Jacks Lake (Lassen National Forest); Lassen National Forest 1836 Comment
  SEINET3850947  Prunus virginiana Dwayne Estes 2004-1 06028 Lassen SE side of Horse Lake along E roadside 1554 Comment
  CAS-BOT-BC154771  Prunus virginiana var. demissa L. B. Barlow 1967-7-1 63 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road 1554 Comment
  CAS-BOT-BC383104  Prunus virginiana var. demissa Andrew Townesmith; Karen M. Meyer 2007-7-20 835 Lassen Lassen National Forest, Eagle Lake Ranger District. Along Forest Service road 30N03, 0.5 mile from intersection with state route 36, at roadblock where two decrepit bridges cross Susanville River 1429 Comment
  JEPS107870  Prunus virginiana var. demissa Lowell Ahart, John Dittes 2005-6-2 11931 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
  SEINET10914051  Prunus virginiana var. demissa Andrew Townesmith, Karen M. Meyer 2007-7-20 Townesmith 835 Lassen Lassen National Forest, Eagle Lake Ranger District. Along Forest Service road 30N03, 0.5 mile from intersection with state route 36, at roadblock where two decrepit bridges cross Susanville River. T29N R11E S6 SW 1/4. 1429 Comment
  UC1128444  Prunus virginiana var. demissa G. T. Nordstrom 1936-7-8 902 Lassen 2 mi se of Dog Valley (Tahoe National Forest); Tahoe National Forest 1798 Comment
  CAS-BOT-BC357283  Pseudognaphalium microcephalum John Thomas Howell; Gordon H. True 1973-8-1 50155 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC239796  Pseudoroegneria spicata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CAS-BOT-BC239800  Pseudoroegneria spicata John Thomas Howell 1976-7-20 51997 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  CAS-BOT-BC239804  Pseudoroegneria spicata David D. Keck 1944-7-8 5450 Lassen 1.5 mi. W. of Susanville on rim of plateau overlooking Susan River Canyon 1341 Comment
  CHSC11770  Pseudostellaria jamesiana Wayne O. Baum 1971-7-6 71 -6 Lassen E. slope of Gallatin Peak. 1950 Comment
  CHSC29919  Pseudostellaria jamesiana Robin Ondricek 1978-6-27 73 Lassen On Coleman Lake Rd., 1977 burn area. 1950 Comment
  JEPS51149  Pseudostellaria jamesiana Brown and Wieslander 1922-7-28 51 Lassen Martin Sprs. Eagle Lake; , Martin Sprs Comment
  CHSC110907  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. About 100 yards southeast of the tall poles. 1267 Comment
  CHSC112453  Psilocarphus brevissimus var. brevissimus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18756 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
  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
  CHSC64868  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald; Lowell Ahart 1995-6-19 6897 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. 1383 Comment
  CHSC4880  Psilocarphus elatior R. Carter 1967-6-27 560 Lassen Ca. 10 yds off N side of Rd. 1.75 mi W of Eagle Lake Biology Station. 1584 Comment
  CHSC60879  Psilocarphus oregonus Vernon H. Oswald; Lowell Ahart 1993-7-8 5672 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
  NY702519  Psoralidium lanceolatum J. T. Howell 1934-6-10 11860 Lassen Doyle Comment
  POM27927  Psoralidium lanceolatum Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  UC124154  Psoralidium lanceolatum unknown 1892-6-23 Lassen Honey Lake Comment
Read comments
May 13 2011
  UCD136178  Pteridium aquilinum var. pubescens John Thomas Howell; Gordon H. True 1973-5-12 49175 Lassen Sierra Nevada, Elysian Valley northwest of Janesville. 1325 Comment
  CAS-BOT-BC239792  Puccinellia distans G. Schoolcraft 1993-6-1 2270 Lassen Coyote Spring 1463 Comment
  SEINET200160 Image available Puccinellia distans Malcolm A. Nobs, S. Galen Smith 1949-7-22 1070 Lassen Northeast shore of Eagle Lake. Comment
  POM313139  Puccinellia distans Malcolm A. Nobs, S. Galen Smith 1949-7-22 1070 Lassen Northeast shore of Eagle Lake Comment
  CHSC93243  Puccinellia lemmonii John Dittes; Scott Chamberlain 2004-6-28 1015 Lassen Modoc Plateau; Long Valley; ca. 2.2 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1445 Comment
  JEPS114875  Puccinellia lemmonii Lowell Ahart, John Dittes 2008-6-20 14967 Lassen Saline area, 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
  RSA0036998  Puccinellia lemmonii Lowell A. Ahart, John Dittes 2008-6-20 14967 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UCD93433  Puccinellia nuttalliana G. Schoolcraft 2000-6-12 2908 Lassen Cold Springs Reservoir at NE end of Madeline Plains. 1645 Comment
  SEINET222545 Image available Puccinellia nuttalliana Noel H. Holmgren, Patricia Holmgren 1978-6-13 8939 Lassen 2.7 km (1.7mi) north-west of Wendel. 1250 Comment
  CHSC12464  Purshia tridentata Robert W. Severin 1969-6-20 6 Lassen 1 mile sse of E.L.B.S. 2/3 mile along road up to Five Points. 1630 Comment
  CHSC23564  Purshia tridentata W. O. Baum 1971-6-28 42 Lassen Along fire trail on e slope of Gallatin Peak. 1920 Comment
  CHSC7722  Purshia tridentata Beverley J. Wise 1969-5-4 94 Lassen 3.0 mi west on Shaeffer Mtn Lookout rd off Hwy 395, 27.4 mi. east of Susanville. 2042 Comment
  SEINET10483496  Purshia tridentata Mary Susan Taylor 1982-5-7 Taylor 4431 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
  UC1128550  Purshia tridentata var. tridentata K. Bradshaw 1939-5-27 234 Lassen Black Mountain Experimental Forest; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC12421  Purshia tridentata var. tridentata M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  UC773873  Purshia tridentata var. tridentata L. R. Short and Wm. Gansberg 1936-7-9 S- 482 Lassen Burgess Spring Experimental Range; Lassen National Forest 1792 Comment
  CAS-BOT-BC462881  Pyrola asarifolia George W. Gillett 1957-7-24 900 Lassen Lassen Volcanic National Park: Cameron Meadow 1950 Comment
  CAS-BOT-BC466053  Pyrola picta A. G. Brenneis 1928-7-3 11 Lassen Lassen Forest, Jesson Valley 1463 Comment
  RSA46867  Pyrola picta subsp. dentata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UCR163275  Pyrrocoma hirta Jim Andre 1993-6-29 1408 Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  CHSC58834  Pyrrocoma hirta var. lanulosa Vernon H. Oswald; Lowell Ahart 1992-7-16 5129 Lassen Feather Lake on the S side of Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), ca. 0.4 mi E of Champs Flat Rd. (County Rd. 105, Forest Rd. 32N02), between Old Station and Susanville. On the margin of the lake. 1749 Comment
  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
  POM39970  Pyrrocoma lanceolata Marcus E. Jones 1897-6-30 s.n. Lassen Ranch below Eagle Lake. Susanville, 4 miles. 1524 Comment
  CAS-BOT-BC362273  Pyrrocoma lanceolata var. lanceolata James Jokerst 1983-7-24 1881 Lassen Near Madeline Plains 1614 Comment
  SD108109  Pyrrocoma lanceolata var. subviscosa Richard Alan Mayes 1973-7-23 89 Lassen 43 miles south of Alturas, on US Highway 395 Comment
  CAS-BOT-BC362319  Pyrrocoma racemosa var. paniculata John Thomas Howell 1951-8-20 28227 Lassen Honey Lake Valley near Herlong 1280 Comment
  UCD46633  Quercus kelloggii John Thomas Howell; Gordon H. True 1973-5-12 49159 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CAS-BOT-BC104478  Quercus vacciniifolia Brighton C. Cain 1925-8-24 95 Lassen Mt Lassen Volcanic National Park 1 mi below Drakesbad 1645 Comment
  CHSC12437  Ranunculus Robert W. Severin 1969-6-20 1 Lassen 1 mile sw E.L.B.S. on west side of Murrer's Upper Meadow; along irrigation ditch. 1569 Comment
  CHSC61174  Ranunculus alismifolius var. lemmonii Vernon H. Oswald; Lowell Ahart 1993-5-12 5380 Lassen Canal crossing Hwy. 44, 3.5 mi NW of A21 (to Westwood). On the N side of the road and on the E side of the canal. 1729 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
  JEPS88527  Ranunculus aquatilis var. capillaceus Vernon H. Oswald and Lowell Ahart 1996-6-24 7877 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road, in Papoose Creek where it leaves the n end of meadow); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  UC9368  Ranunculus aquatilis var. capillaceus M. S. Baker and Frank Nutting 1894-7-25 Lassen Eagle Lake 1524 Comment
  SEINET10536066  Ranunculus aquatilis var. capillaceus Mary Susan Taylor 1974-1 Taylor 282 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  SEINET10899319  Ranunculus aquatilis var. capillaceus Mary Susan Taylor 1982-6-12 Taylor 4648 Lassen T29N R10E ne/nw sec 13. Westwood quad. Aquatic in still pond on n side of West Fork of Susan River, s side of Hwy 36 at jct w/ Willow Cr Rd, 8 mi w Susanville. Comment
  CHSC110303  Ranunculus aquatilis var. diffusus L. P. Janeway; B. Castro 2012-7-2 10932 Lassen Modoc Plateau. East side of Skedaddle Mountains; large meadows along Skedaddle Creek, just upstream from 'Skedaddle Ranch. 1600 Comment
  JEPS121299  Ranunculus aquatilis var. diffusus Lowell Ahart, John Dittes 2013-7-23 18891 Lassen Margins of a man-made pond, about 150 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC13592  Ranunculus cymbalaria D. L. Stites 1967-6-24 36 Lassen Collected ca. 3 1/2 mi. se ELBS, Upper Murrer Meadow. 1524 Comment
  RSA152629  Ranunculus cymbalaria var. saximontanus I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16345 Lassen N of road 13.5 miles E of Susanville Comment
  UC1136880  Ranunculus glaberrimus L. R. Short 1936-4-28 S- 338 Lassen Burgess Spr. Exp. Range Lassen National Forest 1737 Comment
  UC1776660  Ranunculus glaberrimus var. ellipticus G. Schoolcraft 1995-4-2 2464 Lassen East end of Elysian Valley W. of Janesville 1310 Comment
  JEPS123841  Ranunculus macounii Lowell Ahart, John Dittes 2015-7-14 20328 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UC1137287  Ranunculus occidentalis K. E. Bradshaw 1939-5-27 242 Lassen near S. end of Black Mountain Experimental Forest Plot 39-4; Lassen National Forest, Halls Flat Quadrangle 1737 Comment
  UC1584003  Ranunculus occidentalis G. Schoolcraft 1990-5-15 2050 Lassen about 4 mi s Nubieber; John's Valley 1310 Comment
  NY494767  Ranunculus occidentalis var. dissectus H. D. D. Ripley 1943-6-13 5682 Lassen Near Milford 1264.9 Comment
  NY494769  Ranunculus occidentalis var. ultramontanus W. W. Eggleston 1911-5-29 6759 Lassen Vicinity of Doyle Station 1290 Comment
  JEPS55022  Ranunculus orthorhynchus var. orthorhynchus Brown and Wieslander 1922-7-30 13 Lassen Martin Sprs. Eagle Lake Comment
  POM312416  Ranunculus sceleratus Malcolm A. Nobs, S. Galen Smith 1949-7-21 1050 Lassen Small marshy creek, 1 mile E of Maderline, Comment
  CDA3492  Ranunculus testiculatus T. C. Fuller 1969-5-22 18480 Lassen County fairgrounds, Susanville. 0 Comment
  CAS-BOT-BC362887  Ratibida columnifera Nick Santamaria 1969-7-21 721 Lassen On the west side of Eagle Lake, two miles N. of the Eagle Lake Resort on service road #33N01 Comment
  UC1587100  Rhaponticum repens G. Schoolcraft 1991-7-31 2203 Lassen just n of Hall Spring; Shinn Mts. 1706 Comment
  PASA2371  Rhus ovata M. Stason 1931-3-21 Lassen Near Roscoe Comment
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Dec 17 2014
  CAS-BOT-BC92389  Ribes aureum var. aureum Doris K. Kildale 1930-5-12 9358 Lassen Between Susanville and Leavitt Lake. Comment
  CHSC99274  Ribes aureum var. aureum Lowell Ahart; John Dittes 2008-6-20 14950 Lassen 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
  JEPS114691  Ribes aureum var. aureum Lowell Ahart, John Dittes 2008-6-20 14950 Lassen 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
  CAS-BOT-BC93390  Ribes cereum George W. Gillett 1957-7-26 916 Lassen Lassen Volcanic National Park. Butte Lake. 1844 Comment
  CHSC67058  Ribes cereum Willis Ball 1969-6-19 8 Lassen Found approx. 100 yds. N.E. of E.L.B.S. 1615 Comment
  UC1127635  Ribes cereum A. Simontacchi 1940-6-15 882 Lassen 0.4 mi nw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  JEPS87426 Image available Ribes cereum var. cereum Vernon H. Oswald and Lowell Ahart 1993-6-3 54887 Lassen just s of ford over Pine Creek (Champs Flat Rd (Lassen 105, Forest 32N28Y), 7.0 mi n of tis junction w Lassen 21 (32N02) to Eagle Lake, between Poison Lake and Susanville); Champs Flat Rd, Lassen 105, Forest 32N28Y 1688 Comment
  CAS-BOT-BC212656  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 mile E of Fredonyer Pass Comment
  RSA31677  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 mile east of Fredonyer Pass on hwy 36. 1707 Comment
  SEINET10482953  Ribes roezlii Mary Susan Taylor 1974-5-4 Taylor 229 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
  SEINET10838520  Ribes roezlii Mary Susan Taylor 1974-1 Taylor 309 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC106588  Ribes velutinum C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC23559  Ribes velutinum W. O. Baum 1971-6-21 39 Lassen E slope of Gallatin Peak along edge of fire trail. 1920 Comment
  UCR17289  Ribes velutinum Frank C. Vasek 1975-7-11 750711- 19 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CAS-BOT-BC363009  Rigiopappus leptocladus G. Schoolcraft 1989-6-7 1905 Lassen Lower NE slope of Shaffer Mtn. Comment
  UC35867  Rigiopappus leptocladus Milo S. Baker July 1894 Lassen s side Dixie Mts. Comment
  CAS-BOT-BC74533  Rorippa curvisiliqua Al Simontacchi 1940-6-4 806 Lassen Lassen Forest. 14.8 miles west of Harvey Mountain Lookout. 1783 Comment
  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
  CHSC4261  Rorippa nasturtium-aquaticum K. R. Stern 1967-6-24 2405 Lassen Murrer Meadow, ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  CHSC113076  Rorippa palustris subsp. hispida Lowell Ahart; John Dittes 2013-7-22 18864 Lassen North margin of a duck field, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  NY182160  Rorippa sinuata G. Schoolcraft 1989-6-6 1901 Lassen North end of Secret Valley west of Hwy. 395. 1350.3 Comment
  CHSC33101  Rorippa sphaerocarpa M. S. Taylor 1974-7-10 278 Lassen In meadow, ca. 3 mi s of Gallatin Beach on s end of Eagle Lake, ca. 12 mi nw of Susanville. 1524 Comment
  SBBG3088  Rosa woodsii subsp. ultramontana H. and M. Dearing 1939-6-6 3562 Lassen Bieber Comment
  JEPS45632  Rosa woodsii var. ultramontana Brown and Wieslander 1928-6-16 Lassen Eagle Lake 1584 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
  CHSC60401  Rubus parviflorus Mary Ann Showers 1992-6-13 2556 Lassen Lassen Volcanic National Park. Southwest of Widow lake. 2072 Comment
  CHSC27648  Rumex acetosella George Deniso 1978-7-16 74 Lassen Streamside along Hwy 36, several mi E of Fredonyer Pass. Comment
  JEPS117592  Rumex acetosella 2010-7-31 17001 Lassen About 50 yards east of the large culvert, 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 1516 Comment
  UC1191289  Rumex crispus Malcolm A. Nobs and S. Galen Smith 1949-8-20 1481 Lassen 1 mi n Doyle; Long Creek Comment
  CAS-BOT-BC433244  Rumex crispus Margaret Williams 1974-7-27 74 -L-64 Lassen Area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CHSC76101  Rumex fueginus Lowell Ahart; Vernon H. Oswald 1999-9-13 8214 Lassen On the edge of a flooded canal, just southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  CAS-BOT-BC109328  Rumex paucifolius Geo. A. Fisher 1928-6-23 32 Lassen Halls Flat. 1615 Comment
  CHSC106224  Rumex paucifolius Arthur C. Barrett 1915-7-2 12 Lassen Laufman Ranger Station. 1463 Comment
  CHSC112393  Rumex salicifolius Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18774 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC67689  Rumex salicifolius var. lacustris James D. Jokerst 1983-7-25 1891 Lassen Madeline Plains W of Termo. Comment
  UC1101217  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-7-29 8183 Lassen e side Tule 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
  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
  RSA0105590  Rumex stenophyllus Lowell Ahart, John Dittes 2013-7-22 18866 Lassen North margin of road levee, about 100 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC111165  Rumex triangulivalvis Lowell 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
  RSA0105589  Rumex triangulivalvis Lowell Ahart, John Dittes 2013-7-22 18867 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC71095  Rumex venosus Vernon Oswald; G. Schoolcraft, B. Corbin, M. Mini 1998-5-16 9086 Lassen About 1.5 mi southeast of Herlong along a dirt road on the north side of Long Valley Creek between Garnier Rd. and the RR. 1249 Comment
  POM203794  Rumex venosus J. T. Howell 1934-7-8 12486 Lassen Spaldings Resort; Eagle Lake Comment
  RSA249402  Rumex venosus Thomas W. Nelson, S. Dowty 1971-7-22 19300 Lassen Along Hwy 395, about 4 miles east of Standish 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
  POM362636  Salix bonplandiana Christopher Davidson 1975-6-6 2725 Lassen Ca 3.5 miles on road to Thompson Peak. Branching E of rd 204 ca 7.5 miles SW of Susanville. (Rd 204 follows Gold Run Cr.) 1677 Comment
  CAS-BOT-BC102812  Salix boothii Mrs. H. P. Bracelin 1934-6-14 820 Lassen Upper Silver Creek, near Silver Lake (Lost Lake), Warner Mountains 2316 Comment
  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
  HSC95346  Salix eastwoodiae Gordon Leppig, J. Cromwell 1997-7-27 608 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC108057  Salix exigua John Thomas Howell; Gordon H. True 1973-8-1 50150 Lassen Gold Run Creek Road south of Susanville, Diamond Range - Sierra Nevada 1584 Comment
  JEPS107443  Salix exigua Lowell Ahart, John Dittes 2005-6-1 11905 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
  RSA0035819  Salix exigua Lowell A. Ahart, John Dittes 2008-6-22 15043 Lassen In Big Valley, about 2.4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.4 miles (air) northeast of Bieber. 1257 Comment
  UC481924  Salix exigua var. hindsiana Mrs. H. P. Bracelin 1931-6-29 485 Lassen at edge of Pit River McArthur 960 Comment
  CAS-BOT-BC107961  Salix geyeriana John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49220 Lassen Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  CAS-BOT-BC128170  Salix lasiandra var. lasiandra John Thomas Howell; Gordon H. True 1973-8-1 50149 Lassen Transition Zone forest in areas of granitic rock, Gold Run Creek road south of Susanville, Diamond Range - Sierra Nevada 1584 Comment
  CAS-BOT-BC128174  Salix lasiandra var. lasiandra Mrs. E. C. Sutliffe 1927-6-1 s.n. Lassen Drakesbad - Lassen Volcanic park Comment
  NY430478  Salix lasiolepis G. Schoolcraft 1998-5-22 2719 Lassen Susan River east end of Susanville 1268.0 Comment
  CAS-BOT-BC124637  Salix lemmonii M. B. Kildale 1926-9-11 2788 Lassen Susanville 1524 Comment
  SEINET11987291  Salix lutea J. Vale, Wagnon, K.; Knight, W.; Knight, I. 1981-1 4121 Lassen Willow Creek Campground on road between adin and Said Valley Reservoir Comment
  UCR67403  Salsola gobicola George K. Helmkamp 1990-9-23 B- 16 -90 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  RSA339985  Salvia aethiopis Noel Holmgren, Patricia K. Holmgren 1980-7-3 9459 Lassen US Highway 395, 7.9 km (4.9 mi) south of Likely 1550 Comment
  CHSC42206  Salvia dorrii C. E. Laver 1985-6-1 Lassen Ca. 5.5 mi ne of Litchfield and 5 mi nw of Wendel. 1371 Comment
  JEPS62690  Salvia dorrii var. incana Duncan Dunning 1923-6-6 Lassen rocks below Ravendale Comment
  CAS-BOT-BC214312  Salvia dorrii var. pilosa P. Monnet 1915-7-1 815 Lassen Hot Springs Peak 182 Comment
  SEINET8018246  Salvia dorrii var. pilosa J. A. Young 1982-6-7 s.n. Lassen NE Lassen County, Redlands. 1676 Comment
  SEINET10880384  Sambucus caerulea Andrew Townesmith 2012-9-4 Townesmith 2398 Lassen Along California route 44, at milepost 34, ca. 2 miles west of intersection with California route 36. 1671 Comment
  CHSC30567  Sambucus mexicana Sori H. Shad 1970-7-1 26 Lassen Found by spring east of Galleten Beach. 1584 Comment
  JEPS103224  Sanicula graveolens G. Schoolcraft 1992-5-1 2235 Lassen W. of Susan Hills Subd. SW. of Susanville 1341 Comment
  UCR67389  Sarcobatus vermiculatus George K. Helmkamp 1990-9-23 D- 5 Lassen 20 mi north of Litchfield along US Hwy 395 1437 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
  UCSB61641  Sarcobatus vermiculatus True, Gordon 1936-6-21 Lassen Honey Lake Valley 1219 Comment
  UC70391  Sarcodes sanguinea Milo S. Baker 1890-4 Lassen Honey Lake Valley Comment
  UC1037239  Saxifraga aprica Leo Whitney 1935-6-11 3227 Lassen Camp 10, Fruit Grower's Supply Company Camp 10; Lassen National Forest, Fruit Grower's Supply Company Comment
  UC1127669  Saxifraga nidifica var. nidifica A. Simontacchi 1940-5-14 726 Lassen 4.1 mi wnw of Aspen Well (Lassen National Forest); Lassen National Forest 1767 Comment
  RSA719710  Schoenoplectus acutus Michael A. Vincent, K. Levings 2006-7-29 12918 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. Comment
  CAS-BOT-BC111301  Schoenoplectus acutus var. occidentalis Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-8-20 1487 Lassen Long Creek, 1 mile south of Doyle Comment
  CHSC99154  Scirpus acutus var. occidentalis Lowell Ahart; John Dittes 2008-6-22 15018 Lassen On the east end of the levee, about 100 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber. 1260 Comment
  UC2120  Scirpus fluviatilis J. Burtt Davy Jun 17 1897-Jun 24 1897 3285 Lassen w end Honey Lake; Honey Lake Valley, w end Honey Lake Comment
  CHSC61594  Scirpus microcarpus Arthur G. Barrett 1915-8-18 35 Lassen Plumas National Forest. Laufman Ranger Station. 1463 Comment
  UC2198  Scirpus pungens J. Burtt Davy Jun 17 1897-Jun 24 1897 3286 Lassen sloughs Susan River (Honey Lake Valley); , Honey Lake Valley Comment
  CHSC66409  Scrophularia desertorum Vernon H. Oswald; Lowell Ahart 1996-6-17 7786 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. 1432 Comment
  UC767449  Scrophularia desertorum R. F. Hoover 1940-9-28 4632 Lassen Susanville Comment
  SEINET8020068  Scutellaria angustifolia subsp. micrantha C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  CHSC77219  Scutellaria holmgreniorum G. Schoolcraft 1998-7-14 2762 Lassen N. of Shaffer well on E. side of Tablelands. 1371 Comment
  RSA450332  Scutellaria holmgreniorum Gary Schoolcraft 1986-6-25 1641 Lassen S. of Observation Peak about 1.5 mi. east of Post Camp. 1677 Comment
  SEINET3861523  Scutellaria holmgreniorum Noel H. Holmgren, Patricia K. Holmgren 1980-7-5 9524 Lassen Upper Smoke Creek drainage, 21.9 km (13.6 mi) from U.S. Hwy-395 via Rye Patch Canyon, 24 km (15 mi) airline distance SE of Ravendale.; 0 1585 Comment
  CAS-BOT-BC214265  Scutellaria nana Clarence R. Quick 1966-7-22 66 -50 Lassen Susanville-Pittville Road, Blacks Mtn. Hdqts., Halls Flat, 9 m. e. of Hat CreekRocky campgd. 1706 Comment
  CAS-BOT-BC214266  Scutellaria nana Clarence R. Quick 1966-7-22 66 -55 Lassen Edge of logging road 19, east of Patterson Flat 1706 Comment
  CAS-BOT-BC214270  Scutellaria nana John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50692 Lassen Slope south and southeast of Diamond Mt., Sierra Nevada 2286 Comment
  HSC82251  Scutellaria nana Thomas W. Nelson, Jane P. Nelson 1980-7-6 6010 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS88204  Scutellaria nana Vernon H. Oswald and Lowell Ahart 1996-6-24 7863 Lassen 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), Modoc Plateau, on w side of Papoose Meadows 0.4 mi s of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  RSA201224  Scutellaria nana Clarence R. Quick 1964-8-1 64 -92 Lassen Cal Mt. east of Poison Lake. 1768 Comment
  SBBG125002  Scutellaria nana C. B. Hardham -Jun-2000 Lassen Gold Run Crk, S of Susanville Comment
  SJSU5853  Scutellaria nana J. W. Tilden 1960-6-27 1508 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  UC1137689  Scutellaria nana George A. Fischer, Irwin H. Johnson 1933-7-12 F 221 Lassen Lassen National Forest, Lassen Forest and Range Experiment Station Lassen National Forest; , Lassen Forest and Range Experiment S 1722 Comment
  UC1549235  Scutellaria nana Richard Olmstead 1983-7-2 415 Lassen 16 mi s of Ravendale (1 mi s of rest area, near small stream, along US 395); US 395 1444 Comment
  UC1609093  Scutellaria nana Vernon H. Oswald and Lowell Ahart 1993-7-8 5653 Lassen on se edge of Poison Lake (Pittville Rd. (Lassen 111, 36N01) 1.9 mi n of Hwy 44) 1709 Comment
  SEINET13947834 Image available Scutellaria nana Noel H. Holmgren, Patricia K. Holmgren 1980-1 9524 Lassen Upper Smoke Creek drainage, 21.9 km from US Hwy 395 via Rye Patch Canyon, 24 km airline distance SE of Ravendale; 1580 m alt., T33N, R16E, SEC36 1580 Comment
  SEINET4891272  Secale cereale M. J. Williams 1974-7-26 74 -I-38 Lassen 2 miles west of Hallelujah Junction, south of HWY 70 1494 Comment
  UCR244035  Secale cereale Jim Andre 1993-6-5 19705 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, c. 3 mi. SE of Susanville, just south of airport 1256 Comment
  SEINET10517203  Secale cereale Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 887 Lassen Collected 3 mi N of Milford. On Hwy 395 at Honey Lake Campgrounds. Comment
  NY758141  Sedum lanceolatum J. T. Howell 1974-7-30 50670 Lassen Summit ridge of Diamond Mountain 2286 Comment
  UC1063252  Senecio aronicoides A. Simontacchi 1940-5-28 769 Lassen 9.3 mi nw Crater Lake; Halls Flat Quad. 1752 Comment
  UC1137766  Senecio aronicoides August L. Hormay 1934-5-15 Lassen 1.50 mi e Halls Flat; Lassen National Forest 1767 Comment
  UC1184060  Senecio aronicoides Jean Langenheim 1957-6-26 4372 Lassen ne part Said Valley Comment
  CHSC106074  Senecio canus Lowell Ahart; John Dittes 2010-7-31 16990 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
  CDA38660  Senecio eurycephalus var. lewisrosei B. Villegas 2010-6-17 PDR# 1535022 Lassen South of Adin; Hwy. 139 at Milepost 58. 0 Comment
  CHSC20308  Senecio hydrophiloides S. Villard 1973-7-7 63 Lassen Meadow, off county dirt road, 5 mi from Red-Rock Lookout. 2133 Comment
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Apr 29 2013
  CHSC54176  Senecio hydrophiloides Vernon H. Oswald 1991-5-28 4628 Lassen South end of Elkins Ln (100 ft south of Modoc-Lassen county line), Ash Creek Wildlife Area, ca. 7 miles northeast of Bieber. Meadow. 1267 Comment
  CHSC60822  Senecio hydrophiloides Vernon H. Oswald; Lowell Ahart 1993-6-28 5600 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. Meadow. 1725 Comment
  JEPS87532  Senecio hydrophiloides Vernon H. Oswald and Lowell Ahart 1993-6-28 5600 Lassen Rd 35N04 at Aspen Well (n of Hwy 44 on nw edge of valley, ne of Poison Lake); Harvey Valley 1725 Comment
  SEINET10833711  Senecio integerrimus Billy Joe Cox 1971-6-2 Cox 3106 Lassen Approx. 30 mi. N of Susanville, on Calif. Hwy. 139, in basalt. Assoc.: Pinus-Artemisia-Juniper. 1646 Comment
  CAS-BOT-BC363856  Senecio integerrimus var. exaltatus Doris Kildale Gillespie 1930-5-13 9388 Lassen Between Susanville and Janesville Comment
  JEPS94603  Senecio integerrimus var. exaltatus Vernon H. Oswald and Lowell Ahart 1997-5-27 8508 Lassen on Forest Route 38N04 0.3 mi e Hwy. 139 (n of Susanville (between Hwy 139 near Willow Creek Guard Station and Coyote Flat), between the road and a small creek) 1560 Comment
  OBI76934  Senecio integerrimus var. exaltatus Anthony Baniaga 2011-6-11 336 Lassen Lassen Natl forest. Along 105, W of Champs Flat. Champs Flat quad T33N R9E sec 27 NW of SW 1686 Comment
  UC1063253  Senecio integerrimus var. exaltatus A. Simontacchi 1940-5-15 712 Lassen 10.2 mi e Coyote Spring; Lassen National Forest, Halls Flat Quad. 1699 Comment
  RSA0124971  Senecio integerrimus var. exaltatus E. K. Balls 1950-5-19 14776 Lassen By E. end Maul Reservoir, on rd. from Adin to Madeline. 1524 Comment
  SFV10993  Senecio serra J. Turner, F. M. Ball (1192) 1962-7-13 s. n. Lassen Laufman Public Camp, 3 miles off Highway 395 from Milford near Honey Lake. 1494 Comment
  JEPS79212  Senecio serra var. serra L. R. Heckard with R. C. Bacigalupi 1980-6-12 5253 Lassen about 4.5 mi e Westwood Junction (along Highway 36) 1615 Comment
  UC36171  Senecio triangularis M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CDA2461  Setaria verticillata Willis Wheeler Oct 1930 Lassen 0 Comment
  CHSC104781  Setaria viridis Lowell Ahart; John Dittes 2010-8-31 17139 Lassen On the east side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. 1276 Comment
  HSC82190  Sidalcea glaucescens Thomas W. Nelson, Jane Nelson 1980-7-6 6039 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  SBBG128040  Sidalcea glaucescens L. Ahart, J. Dittes 2010-7-31 17016 Lassen S side of the rd, ca. 50 yards E of the large culvert, where the rd crosses Hunsinger Draw, 1.9 mi NW of Moll Reservoir, 2.8 mi W of Ash Valley, 8.4 mi SE of Adin 1516 Comment
  CHSC83236  Sidalcea oregana Raymond D. Ratliff 1965-8-6 53 Lassen Lassen National Forest, Harvey Valley Allotment (Ashurst Well). Streambed. 1950 Comment
  POM84765  Sidalcea oregana subsp. oregana Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  POM260184  Sidalcea oregana subsp. oregana C. L. Hitchcock 1940-5-26 6643 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  RSA647545  Sidalcea oregana subsp. oregana Marion P. Harthill 1971-6-21 204 Lassen Susanville. Comment
  HSC95261  Sidalcea oregana subsp. spicata Gordon Leppig 1998-8-17 1050 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS28713  Sidalcea oregana subsp. spicata George W. Gillett 1957-7-29 944 Lassen along trail between Butte Lake and Snag Lake; Lassen Volcanic National Park, btw Butte Lake and Snag Lake 1859 Comment
  POM84786  Sidalcea oregana subsp. spicata Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  UC1523760  Silene bernardina Gary Schoolcraft 1982-6-23 727 Lassen Ft. Sage Mts. 1828 Comment
  CAS-BOT-BC389493  Silene menziesii H. D. Ripley; R. C. Barneby 1943-6-14 5751 Lassen Mesa W. of Susanville 1310 Comment
  CHSC91925  Silene nuda L. P. Janeway 2005-7-31 8511 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
  UC1553400  Silene nuda G. Schoolcraft 1988-7-7 1818 Lassen ca 1 mi s Horne Ranch (se corners of Madeline Plains); , s of Horne Ranch 1645 Comment
  UCD99020  Silene nuda E. Sawyer 1935-6-27 223 Lassen Long Valley. 1310 Comment
  CAS-BOT-BC389549  Silene nuda David D. Keck 1944-7-8 5446 Lassen Sierra Nevada. 2 mi. E. of Westwood, meadow leading to Mountain Meadows Reservoir 1524 Comment
  SJSU10112  Silene nuda J. W. Tilden 1960-6-27 1502 Lassen foot of Moonlight Rd near Westwood 1524 Comment
  CAS-BOT-BC75079  Sisymbrium altissimum Louella Bass 1973-5-25 46 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  HSC27354  Sisymbrium altissimum D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19283 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  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
  RSA152595  Sisymbrium altissimum I. L. Wiggins, Dorothy Wiggins 1961-6-11 16333 Lassen 13.5 miles E of Susanville. Comment
  UCD138789  Sisyrinchium bellum Gerald Dickinson 1963-7-2 71 Lassen east of Willow Creek campground, south of Hayden Hill, State Highway 139. 1219 Comment
  CDA38567  Sium suave T. C. Fuller 1959-7-7 4732 Lassen Highway 395, 7.5 miles east of Susanville. 0 Comment
  UCD128140  Sium suave J. M. Tucker 1950-7-25 1973 Lassen 0.5 mile southwest of Bieber. Comment
  POM38169  Sonchus asper Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  CHSC113057  Sonchus asper subsp. asper Lowell Ahart; John Dittes 2013-7-22 18846 Lassen West margin of a duck field, about 50 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  HSC21340  Sparganium angustifolium R. G. Means 1962-7-4 71 Lassen Hwy. 139 at Slate Creek 1616 Comment
  HSC95260  Sparganium emersum Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 530 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC65371  Sparganium emersum subsp. emersum Vernon H. Oswald 1995-8-21 7212 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. At SW corner of the lake. 1859 Comment
  JEPS96089  Sparganium emersum subsp. emersum Vernon H. Oswald and Lowell Ahart 1996-6-24 7871 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake, Modoc Plateau, Montane Meadow 1633 Comment
  UC1099936  Sparganium emersum var. emersum Verne Grant and Irving Schneider 1947-8-24 8271 Lassen nw shore Blue Lake (n Lassen County) Comment
  SEINET10879624  Sparganium natans Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 844 Lassen Lassen National Forest, Almanor Ranger District. 0.25 miles west of Forest Service road 10 on Forest Service road 31N24. T31N R7E S26 SW 1/4. 1981 Comment
  CAS-BOT-BC213214  Sphaeralcea grossulariifolia P. Monnet 1913-7-1 803 Lassen Hot Spring Peak 1524 Comment
  HSC68557  Sphaeromeria cana Gary Schoolcraft 1979-7-6 127 Lassen N side of Skedaddle Mtns. 1997 Comment
  CAS-BOT-BC374760  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1989-5-3 1865 Lassen North end of Secret Valley s. of Karlo Comment
  CHSC64869  Sphaeromeria potentilloides var. potentilloides Vernon H. Oswald 1995-6-26 6934 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527) 0.4 mi n of Spooner Rd. in Ash Valley. On the e side of the road adjacent to a flat of low sagebrush. 1542 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
  POM91114  Spiraea douglasii Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  JEPS64515  Spiranthes romanzoffiana Brown and Wieslander 1922-7-30 49 Lassen Martin Sprs. Eagle Lake Comment
  CHSC5276  Stachys ajugoides var. rigida L. Harman 1946-6-26 Lassen Pine Creek, Eagle Lake. 1584 Comment
  UC1137688  Stachys ajugoides var. rigida L. R. Short and Wm. Gansberg 1936-7-9 S- 485 Lassen Burgess Spr. Exp. Range Lassen Forest 1795 Comment
  SEINET5337331  Stellaria longipes C. G. Gulling 1905-1 1551 Lassen Big Meadows Comment
  SEINET11924834  Stellaria longipes Unknown 1967-1 550 Lassen 25 yds W of dam in Murrer's Meadow Comment
  CAS-BOT-BC391078  Stellaria longipes subsp. longipes Louella Bass 1973-5-29 87 Lassen Elysian Valley 1325 Comment
  CDA24150  Stellaria longipes var. longipes Gordon Leppig, Tony LaBanca, L. Arguello 1997-6-29 537 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  CHSC76747  Stellaria longipes var. longipes L. P. Janeway 1999-9-5 6577 Lassen High Cascade Range. Upper Pine Creek near Stephens Camp; northwest corner of Upper Stephens Meadow. On south edge of pond. 1900 Comment
  CHSC93702  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
  CHSC68737  Stenotus acaulis Vernon H. Oswald; Lowell Ahart 1997-5-27 8507 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.3 mi east of Hwy. 139. Between the road and a small creek paralleling the road on the north. 1560 Comment
  CDA8837  Stephanomeria exigua S. E. Piper 1943-7-3 Lassen Sierra Ordnance Depot, Herlong. 0 Comment
  UC768667  Stephanomeria exigua subsp. coronaria Robert F. Hoover 1940-10-1 4651 Lassen Johnstonville Comment
  CAS-BOT-BC375447  Stephanomeria exigua subsp. exigua R. F. Thorne; C. W. Tilforth 1969-9-6 39261 Lassen On roadside c. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake) 1280 Comment
  JEPS36876  Stephanomeria lactucina Brown and Wieslander 1922-7-19 40 Lassen Martin Springs Eagle Lake Comment
  SEINET11262513  Stephanomeria lactucina Robert L. Johnson, Mikel R. Stevens 2015-7-10 3939 Lassen Southern Cascade Range. North side of Westwood 0.3 rd mi west of jct with Mooney Rd on CA-36. N side of rd.; 0 1563 Comment
  CHSC71870  Stephanomeria paniculata Vernon H. Oswald; Lowell Ahart 1998-9-8 9588 Lassen Kramer Rd. 3.1 mi south of Lookout. 1280 Comment
  JEPS94085  Stephanomeria paniculata Vernon H. Oswald and Lowell Ahart 1998-9-8 9588 Lassen Kramer Rd. 3.1 mi. s. Lookout 1280 Comment
  UC2062575  Stephanomeria virgata subsp. pleurocarpa Belinda Lo with Alex Randolph-Lowe 2017-10-9 390 Lassen LASSEN COUNTY: Bureau of Land Management, north of Red Rock Road. Comment
  UCR119113  Stipa elmeri Beecher Crampton 1954-7-5 2064 Lassen Modoc Plateau, 4.5 miles west of Susanville, along state highway 36 1433 Comment
  SEINET10523036  Stipa occidentalis Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3114 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
  SEINET10523038  Stipa occidentalis Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 885 Lassen Collected 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. Comment
  UCR17287  Stipa thurberiana Frank C. Vasek 1975-7-11 750711- 37 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  OBI22293  Stipa webberi Robert F. Hoover 1940-9-29 4647 Lassen Pass between Shaffer Mt and Warren Peak 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
  UC1184065  Streptanthus tortuosus var. orbiculatus Jean Langenheim 1957-6-26 4381 Lassen from area adjacent to 1937 chaparral quadrat (ne part of Lassen Co.); Northwest Said Valley Comment
  UCD149957  Stuckenia filiformis subsp. alpina William Anderson 1963-6-24 s.n. Lassen Hartson Reservoir. Comment
  HSC22877  Stuckenia pectinata John Pratt 1970-6-14 13 Lassen Comment
  UC768817  Suaeda moquinii R. F. Hoover 1940-10-5 4669 Lassen Wendel Comment
  CHSC60831  Swertia albicaulis var. albicaulis Vernon H. Oswald; Lowell Ahart 1993-6-28 5605 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  JEPS87423  Swertia albicaulis var. albicaulis Vernon H. Oswald and Lowell Ahart 1993-6-28 5605 Lassen ne of Poison Lake (Road 35N04 at Aspen Well, n of Hwy 44 on nw edge of Harvey Valley); Harvey Valley, Aspen Well 1725 Comment
  JEPS94613  Swertia albicaulis var. albicaulis Vernon H. Oswald and Lowell Ahart 1997-5-27 8488 Lassen e side of Hwy 139 at a small farm stock pond 38.2 mi n Susanville (7.4 mi n of Eagle Lake Rd.) 1627 Comment
  CHSC27669  Swertia albicaulis var. nitida Robert A. Schlising 1978-7-9 3312 Lassen S of Eagle Lake; forested area between Papoose Meadows and Eagle Lake Road. Comment
  JEPS123497  Symphoricarpos longiflorus Wilson Collison, Jaileen Merced 2015-8-8 CA 320 -143 Lassen To Highway 139 W (North) from Termo - Grasshopper Road continue 4.5 mi (1 mile after entering forest). Turn right on to Grand Road (37N29). Continue uphill (East), right at 1st fork, straight at 2nd. Comment
  CHSC79146  Symphoricarpos rotundifolius var. rotundifolius L. P. Janeway 2000-6-24 6839 Lassen Northern High Sierra Nevada. Volcanic promontory on south edge of the top of Crystal Peak. 2371 Comment
  HSC93475  Symphoricarpos rotundifolius var. rotundifolius Gordon Leppig, Tony LaBanca 1998-7-13 964 Lassen Modoc National Forest, Blue Lake Ranch. 1799 Comment
  CHSC76081  Symphyotrichum ascendens Lowell Ahart; Vernon H. Oswald 1999-9-13 8230 Lassen Along the south side of the dirt road, Willow Creek is on the south side of the road, about 250 yards east of the sign-in station along Highway 139, Willow Creek Wildlife Area. 1463 Comment
  UC762731  Symphyotrichum ascendens R. F. Hoover 1940-10-1 4654 Lassen Janesville Comment
  JEPS95906  Symphyotrichum ascendens Lowell Ahart and Vernon H. Oswald 1999-9-13 8230 Lassen along S side of dirt road, Willow Creek is on the S side of the road, about 250 yds. E of the sign in station along Hwy 139, Willow Creek Wildlife Area 1463 Comment
  UC1949147  Symphyotrichum ascendens Barbara Ertter 1987-7-24 7299 Lassen ca 3/4 mi ENE of Beckwourth Pass Comment
  CHSC72216  Symphyotrichum campestre Vernon H. Oswald 1998-9-14 9623 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  JEPS93963  Symphyotrichum campestre Vernon H. Oswald 1998-9-14 9623 Lassen Windy Hollow on the w side of Highway 44 1 mi nw of its intersection with A21 to Westwood; Windy Hollow, Highway 44 1737 Comment
  UC1192209  Symphyotrichum campestre Verne Grant and Irving Schneider 1947-7-31 8210 Lassen ne quater of George Williams section 19 Madeline Plain Comment
  UCD107503  Symphyotrichum foliaceum Tim Kuhn 2006-7-18 49 Lassen Eagle Lake Ranger District. Comment
  CAS-BOT-BC97917  Symphyotrichum frondosum John Thomas Howell 1934-7-8 12508 Lassen [Spalding's] Spalding, Eagle Lake Comment
  CHSC59076  Symphyotrichum frondosum Vernon H. Oswald; Lowell Ahart 1992-8-25 5185 Lassen Lassen Volcanic National Park. Alluvial fan of Grassy Creek at the S end of Snag Lake. 1851 Comment
  JEPS31869  Symphyotrichum frondosum R. F. Hoover 1940-10-1 4660 Lassen near, between Jonesville and Standish Honey Lake Comment
  JEPS95902  Symphyotrichum frondosum Lowell Ahart and Vernon H. Oswald 1999-9-13 8210 Lassen