Search Results — 2000 specimen records retrieved (1619 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: County=LASSEN; Source=All;   

Mapping Options:

BerkeleyMapper with county and bioregion layers
BerkeleyMapper without layers.
KML export
(Note: only records with coordinates are mappable)

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

PLEASE NOTE: Due to changes in newer versions of Excel, directly copying text from the above selected results does not produce a usable table.
    Follow these steps:
      1. The contents of the selected results window must be copied into a text editor like TextEdit for Mac or WordPad for Windows
      2. The selected results must be saved as a new text document.
      3. This new text document can now be copied into Excel or imported as a tab delimited text file.

(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 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.

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
Turn on yellow flags to show possible range discrepancies. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC78034  Abies concolor Doris K. Kildale 1927-9-11 2794 Lassen 8-10 miles north of Susanville 1524 Comment
  CDA19020  Abies concolor Mark Lubinski 2000-10-12 PDR 1103214 Lassen Sierra Nevada; 1 mi W on State Route 44 and 36, ~5 mi W of Susanville. 0 Comment
  CHSC21470  Abies magnifica M. S. Taylor 1975-7-16 839 Lassen On trail between Echo Lake and Summit Lake, Lassen National Park. 2133 Comment
  CAS-BOT-BC28646  Achillea millefolium Margaret Williams 1974-7-27 74 -L-70 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70. 1493 Comment
  CHSC13640  Achillea millefolium M. S. Taylor 1974-7-10 286 Lassen Abundant in meadow ca. 1/2 mi s of Eagle Lake, ca. 2 mi e of Gallatin Beach, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC27595  Achillea millefolium Jeff D. Prouty 1978-7-10 27 Lassen W shore of Coleman Lake, S of Eagle Lake L. 1956 Comment
  CHSC30558  Achillea millefolium Sori H Shad 1970-6-26 13 Lassen Dean's Meadow. 1524 Comment
  UC1537057  Achillea millefolium Gordon H. True Jr. 1936-6-22 524 Lassen se of, near edge of slough Litchfield; Honey Lake Valley 1219 Comment
  RSA716057  Achnatherum hymenoides L. Ahart, John Dittes 2005-6-2 11996 Lassen Long Valley, about 41/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1428 Comment
  UCD50516  Achnatherum lemmonii Beecher Crampton 1954-7-5 2049 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  RSA129475  Achnatherum lemmonii var. lemmonii G. A. Fischer 1933-7-14 252 Lassen Lassen Forest 1768 Comment
  CAS-BOT-BC216802  Achnatherum occidentale John Thomas Howell 1934-7-6 12431 Lassen Hall's Flat Comment
  CAS-BOT-BC216803  Achnatherum occidentale John Thomas Howell 1934-7-10 12535 Lassen Between Harvey Valley and Patterson Flats Comment
  CAS-BOT-BC216451  Achnatherum occidentale subsp. californicum John Thomas Howell 1969-8-7 45884 Lassen Butte Lake, Lassen Park Comment
  CAS-BOT-BC216456  Achnatherum occidentale subsp. californicum Clare B. Hardham 1971-8-22 18413 Lassen Diamond Mountain 2346 Comment
  CHSC68888  Achnatherum occidentale subsp. californicum Vernon Oswald; Lowell Ahart 1997-6-24 8600 Lassen South of Susanville on the north side of Diamond Mtn. On forest Rd. 29N43, 1.2 miles east of Gold Run Rd. 1685 Comment
  UC506985  Achnatherum occidentale subsp. occidentale George A. Fisher and Irwin H. Johnson 1933-7-12 F- 215 Lassen Lassen Forest 1706 Comment
  UC60152  Achnatherum occidentale subsp. occidentale J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Long Valley Honey Lake Valley Comment
  CAS-BOT-BC218616  Achnatherum occidentale subsp. pubescens Margaret Williams; Steven Williams 1974-7-26 74 -L-37 Lassen Burned area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70, Sierra Nevada 1493 Comment
  UC1024810  Achnatherum occidentale subsp. pubescens Leo Whitney 1935-6-11 3271 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1143012  Achnatherum occidentale subsp. pubescens August L. Hormay 1934-6-30 Lassen Harvey Mtn. Lassen National Forest 2133 Comment
  UC1024812  Achnatherum thurberianum Leo Whitney 1935-6-19 3267 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  CHSC117295  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. 1289 Comment
  CHSC29909  Acmispon americanus var. americanus Robin L. Ondricek 1978-7-15 99 Lassen East side of Lower Dry Lake. 1645 Comment
  SEINET5327496  Acmispon americanus var. americanus G. Schoolcraft 1995-6-27 2501 Lassen Cherry Creek 1524 Comment
  CHSC117223  Acmispon denticulatus Lowell Ahart; John Dittes 2016-6-7 20996 Lassen West of the pond, 110 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bierber, 7.3 Miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UCD98583  Aconogonon davisiae Hans Leschke 1945-9-14 s.n. Lassen Mt. Lassen trail. 2621 Comment
  CAS-BOT-BC391609  Actaea rubra John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49411 Lassen Elysian Valley, west of Janesville 1325 Comment
  JEPS35591  Adonis aestivalis Wayne Savage 1964-7-1 339 Lassen 1/2 mi n of Willow Creek Guard Station (16 mi n of Susanville, on State Highway 139, 54 mi s of Adin); State Highway 139 1219 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen Comment
  CHSC5269  Agastache parvifolia J. B. Kimsey 1946-6-10 Lassen 1615 Comment
  SEINET10814664  Agastache parvifolia Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 847 Lassen Lassen National Forest, Eagle Lake Ranger District. Intersection of Forest Service road 32N09 and Forest Service route 10, 6 miles SW of state route 44. 1971 Comment
  SD52320  Agastache urticifolia F. Stephens 1894-7-15 8553 Lassen Comment
  SEINET10757871  Ageratina occidentalis Andrew Townesmith, Karen M. Meyer 2007-7-20 Townesmith 836 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
  CAS-BOT-BC30235  Ageratina occidentalis Hans Leschke 1956-9-22 s.n. Lassen Near Sulphur Works entrance 2042 Comment
  SEINET10616047  Agoseris glauca Paul Gallian, David B. Dunn 1971-6-2 Gallian 520 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
  CHSC60711  Agoseris glauca var. glauca Vernon H. Oswald; Lowell Ahart 1993-6-14 5530 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518,33N89). 1566 Comment
  UCD128649  Agoseris glauca var. glauca Grady L. Webster 1989-5-13 7704 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  CHSC93703  Agoseris glauca var. monticola Lowell Ahart; John Dittes 2005-6-1 11851 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  JEPS107320  Agoseris heterophylla Lowell Ahart, John Dittes 2005-6-1 11885 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction 1438 Comment
  POM34510  Agoseris heterophylla Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  RSA416397  Agoseris heterophylla Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  UC29359  Agoseris heterophylla var. heterophylla M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixey Mts. Comment
  CAS-BOT-BC13230  Agoseris monticola Margaret Williams 1974-8-4 74 -L-79 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70. 1493 Comment
  UC585114  Agoseris parviflora E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1793 Lassen about 2 mi n Madeline 1363 Comment
  UC1776674 Image available Agoseris parviflora G. Schoolcraft 1994-7-7 2365 Lassen About 1 miles west of Boot Lake 219 Comment
  UC725756  Agoseris retrorsa A. A. Heller 1940-5-22 15664 Lassen hill above Westwood Cemetery 1524 Comment
  SEINET10789617  Agropyron cristatum John Thomas Howell 1961-9-25 Howell 36970 Lassen East side of Beckwourth Pass. Sierra Nevada. 1554 Comment
  CDA1684  Agropyron cristatum subsp. pectinatum G. D. Barbe 1974-8-2 1919 Lassen Hallelujah Junction, US 395 at Hwy 70, northwest corner. Comment
  RSA299167  Agropyron desertorum J. T. Howell 1974-7-8 50468 Lassen Susanville 1296 Comment
  UC60210  Agrostis J. Burtt Davy Jun 17 1897-Jun 24 1897 3303 Lassen Honey Lake Valley Comment
  UC1130648  Agrostis alba H. S. Yates 1936-8-11 6069 Lassen Baxter Creek Susanville Quadrangle Comment
  CAS-BOT-BC127239  Agrostis exarata John Thomas Howell; Gordon H. True 1973-8-1 50182 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  CAS-BOT-BC127240  Agrostis exarata John Thomas Howell; Gordon H. True 1973-8-1 50226 Lassen Sierra Nevada. Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville. 2133 Comment
  POM313172  Agrostis exarata Malcolm A. Nobs, S. Galen Smith 1949-7-21 1057 Lassen Lassen County: Shallow marshy stream from springs, 4 miles N of Madeline Comment
  RSA129563  Agrostis exarata L. R. Short 1936-8-21 499 Lassen Burgess Spr. Exp. Range. 1799 Comment
  UC1142988  Agrostis exarata A. L. Hormay 1941-6-25 21 Lassen Burgess Spring Lassen Forest 1676 Comment
  UCD52292  Agrostis exarata L. Whitney 1933-8-1 s.n. Lassen Near Slate Creek. Comment
  CAS-BOT-BC139297  Agrostis idahoensis John Thomas Howell 1973-7-10 49767 Lassen Sierra Nevada. Near Westwood. 1554 Comment
  JEPS71138  Agrostis pallens Brown and Wieslander 73 Lassen Comment
  UC1024638  Agrostis pallens Leo Whitney 1934-7-10 2225 Lassen meadow near Harvey Spring (ca 14 mi w of Eagle Lake); Lassen National Forest, Harvey Valley 1737 Comment
  UC1483834  Agrostis pallens G. Schoolcraft 1980-7-28 330 Lassen rocky meadow area e Tule Mountain (s of Blue Lake) 2042 Comment
  UCD53118  Agrostis pallens Beecher Crampton 1960-6-20 5732 Lassen Halls's Flat, 1/2 mile south Black's Mtn. Exper. Sta. USDA, 11 miles n.w. Bogard Ranger Station, Lassen Natl. Forest. 1706 Comment
  CAS-BOT-BC138622  Agrostis stolonifera H. S. Yates 1936-8-11 6069 Lassen Baxter Creek. 1280 Comment
  CAS-BOT-BC138623  Agrostis stolonifera Margaret Williams; Steven Williams 1974-7-26 74 -L-39 Lassen Sierra Nevada. Near Hallelujah Junction west of Highway 395 and south of Highway 70. 1493 Comment
  SEINET4342189  Agrostis stolonifera B. L. Wilson, D. Lytjen 2005-7-25 11489 Lassen Deep Creek, near confluence with a smaller stream 1359 Comment
  SEINET12558767 Image available Aliciella triodon A. Tiehm 1980-1 5756 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  SEINET14163171  Aliciella triodon A. Tiehm 1980-1 5756 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  UC55670  Alisma plantago-aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3337 Lassen Susan River Honey Lake Valley 1219 Comment
  CHSC117273  Alisma triviale Lowell Ahart; John Dittes 2016-7-15 21221 Lassen About 50 yards west of the road and about 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1483842  Allium acuminatum G. Schoolcraft 1980-6-5 250 Lassen ne side of Snowstorm Mountain Snowstorm Mountain 1584 Comment
  CAS-BOT-BC459567  Allium acuminatum H. C. Cantelow 1940-5-31 3898 Lassen East of Mc Arthur Comment
  CAS-BOT-BC459571  Allium acuminatum H. C. Cantelow 1940-5-31 s.n. Lassen 4 miles east of Mc Arthur, Highway 299 Comment
  SD6424  Allium anceps Mrs. R. M. Austin 1879-1 Lassen No further location information given on label. Comment
  SEINET8117272  Allium atrorubens A. Tiehm, J. Nachlinger, M. J. Williams 1988-1 11702 Lassen S side of Shaffer Mountain, 3.4 road miles N of the Wendel road on highway 395 from Susanville to Alturas, W of the highway. 1387 Comment
  UCD55152  Allium bisceptrum Ellen Dean 2006-5-15 3040 Lassen E of town of Susanville. Along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. 1245 Comment
  UC584334  Allium parvum G. L. Stebbins Jr. and J. A. Jenkins 1937-7-9 2274 Lassen on bare summit ridge and ridges sw Diamond Mt. (s of Susanville) Comment
  CAS-BOT-BC474048  Allium parvum Ethel S. Willits 1940-4-28 199 Lassen South of Surprise Valley, Modoc County 1371 Comment
  UCD138589  Allium parvum Geo. C. Wood 1940-4-25 s.n. Lassen Coffin Ranch near Susanville. Comment
  CHSC68887  Allium platycaule Vernon Oswald; Lowell Ahart 1997-6-24 8624 Lassen South of Susanville on the north side of Diamond Mtn. On Forest Rd. 21N52, 1.0 mi southwest of its junction with 29N43. 2164 Comment
  UC106708  Allophyllum integrifolium T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  CDA40010  Allophyllum integrifolium T. C. Fuller 1963-7-15 10889 Lassen Road to Little Valley, 2.9 miles southeast of Pittville. 0 Comment
  SEINET10589833  Alopecurus Robert F. Thorne, Larry E. DeBuhr 1975-8-22 Thorne 46987 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  UC790958  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen 10 mi. w. Chester (Rte. 36) Comment
  CHSC117285  Alopecurus carolinianus Lowell Ahart; John Dittes 2016-7-15 21214 Lassen About 300b yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) mortheast of Bieber, Big Valley. 1261 Comment
  CHSC117529  Alopecurus carolinianus Lowell Ahart; John Dittes 2016-7-13 21142 Lassen Scattered along the west edge of the pond, 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS119649  Alopecurus carolinianus Lowell Ahart, John Dittes 2012-7-9 18289 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC138009  Alopecurus geniculatus Stuart K. Harris 1960-6-23 21411 Lassen Bed of Poison Lake. 1645 Comment
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  UC1951079  Alyssum desertorum Debra Valov 2009-4-24 2009012 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  UC1924261  Alyssum minus subsp. micranthum Debra Valov 2004-5-31 2004226 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CDA3617  Alyssum minus var. micranthum Vernon H. Oswald & Lowell Ahart 1998-6-4 9144 Lassen Spur road on north side of Red Rock Road, 0.6 mile east of Highway 395, south of Constantia. Comment
  JEPS93815  Alyssum simplex Vernon H. Oswald and Lowell Ahart 1998-6-4 9144 Lassen s of Constantia (at parking area at end of spur road on n side of Red Rock Road 0.6 mi e of Highway 395); Red Rock Road 1389 Comment
  CHSC106172  Amaranthus blitoides Lowell Ahart; John Dittes 2010-8-30 17090 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1274 Comment
  CHSC115589  Amaranthus blitoides Lowell Ahart; John Dittes 2015-7-14 20324 Lassen On the edge of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1264 Comment
  CHSC113078  Amaranthus californicus Lowell Ahart; John Dittes 2013-7-22 18860 Lassen Bottom of a dry bare drainage, 50 yards west of the road levee, about 250 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 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
  CHSC99984  Ambrosia acanthicarpa L. P. Janeway 2008-8-2 9524 Lassen Modoc Plateau. Honey Lake Valley, 4.9 air km southeast of Standish, along Mapes Road 0.3 km east of Lambert Lane. 1222 Comment
  JEPS95710  Ambrosia acanthicarpa Vernon H. Oswald and L. Ahart 1995-8-14 7191 Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  JEPS95745  Ambrosia acanthicarpa Vernon H. Oswald and L. Ahart 1995-8-14 7191 Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  HSC18512  Amelanchier alnifolia var. semiintegrifolia H. E. Parks, S. T. Parks 1928-6-16 261 Lassen Lassen National Park, Drakesbad 1677 Comment
  UC726025  Amelanchier utahensis A. A. Heller 1938-6-4 15144 Lassen about 1 mi e Fredonyer Pass 1706 Comment
  CAS-BOT-BC142538  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  CHSC5244  Amphiscirpus nevadensis 1946-6-25 Lassen Eagle Lake. 1554 Comment
  CAS-BOT-BC222251  Amsinckia Elmer I. Applegate 1934-5-4 8916 Lassen At south end of Secret Valley Comment
  CAS-BOT-BC222256  Amsinckia John Thomas Howell 1934-6-10 11899 Lassen 5 miles n. of Horse Lake on road to Alturas Comment
  HSC3549  Amsinckia lycopsoides Fred J. Kindel 1955-6-6 Lassen Doyle Comment
  CDA40471  Amsinckia menziesii T. C. Fuller 1963-6-1 10618 Lassen West side of road to Susanville, 2.0 miles south of Pittville. 0 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
  CDA40473  Amsinckia menziesii var. menziesii L. Ahart, John Dittes 2005-6-1 11899 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. Comment
  CHSC106685  Amsinckia tessellata B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  HSC28822  Amsinckia tessellata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19277 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  UC1167764  Amsinckia tessellata var. tessellata Peter H. Raven with Otto T. Solbrig 1958-6-17 13276 Lassen 19.0 mi s Ravendale (along US Hwy 395) Comment
  UCD159579  Anaphalis margaritacea D. S. Park 2011-8-24 316 Lassen East of Westwood. Near Goodrich Creek. 319 Comment
  CHSC4828  Anemone oregana R . Carter 1967-7-14 601 Lassen On n side of rd. at the Silver Lake Camp Grounds on the n shore of Silver Lake. Comment
  CHSC71067  Anisocoma acaulis Vernon H. Oswald; Lowell Ahart 1998-5-22 9121 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  CHSC71068  Anisocoma acaulis Vernon H. Oswald; Lowell Ahart 1998-5-22 9134 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. 1341 Comment
  UC1137663  Antennaria argentea L. R. Short and Wm. Gansberg 1936-6-10 S- 414 Lassen Burgess Spr. Exp. Range; Lassen National Forest 1856 Comment
  UC773954  Antennaria argentea L. R. Short and Wm. Gansberg 1936-6-10 S- 414 Lassen Burgess Spr. Exp. Range 1856 Comment
  SEINET2029685 Image available Antennaria argentea C. L. Hitchcock 1940-5-26 6616 Lassen Lava beds about 12 miles north of Fall River Mills (in Shasta County) on Fall River 1372 Comment
  CHSC71069  Antennaria dimorpha Vernon H. Oswald; Lowell Ahart 1998-5-22 9088 Lassen Hwy. 36 between Fredonyer Summit and Susanville, 0.4 mi west of the Susan River and Bizz Johnston Trail. 1417 Comment
  HSC68156  Antennaria dimorpha J. P. Smith, J. O. Sawyer 1971-5-23 4657 Lassen Along Hwy. 139, 23 miles south of junction with road to Thermo. Comment
  UC1125573  Antennaria dimorpha K. E. Bradshaw 1939-5-27 244 Lassen (Plot 39-4) Black Mountain Experimental Forest; Lassen National Forest, Halls Flat Quad. 1737 Comment
  UC1137285  Antennaria dimorpha K. E. Bradshaw 1939-5-27 244 Lassen near s end of Black Mt. Experimental Forest; Lassen National Forest, Halls Flat Quad., Thompson Meadow 1737 Comment
  UCD128922  Antennaria flagellaris G. Schoolcraft 1981-5-27 0456 Lassen Hayden Hill. 1737 Comment
  CAS-BOT-BC69138  Antennaria geyeri Milo S. Baker 1894-7-12 s.n. Lassen Pine Creek Comment
  CHSC65087  Antennaria geyeri Vernon H. Oswald; Lowell Ahart 1995-7-24 7130 Lassen High Cascade Range. N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just S of Pine Creek. 1950 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
  POM39124  Antennaria geyeri Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC69142  Antennaria geyeri Christopher Davidson 1974-7-24 2487 Lassen jCa. 4 mi W of Janesville on rd to Antelope Valley 2133 Comment
  HSC97018  Antennaria luzuloides L. Ahart, John Dittes 2005-6-1 11862 Lassen 1/2 mile west of Scott Rd., Long Valley, about 2 air miles NW of the intersection of Scott Rd. and Hwy. 70. 3.9 air miles NW of Hallelujah Junction 1449 Comment
  JEPS107290  Antennaria luzuloides Lowell Ahart, John Dittes 2005-6-1 11862 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  RSA702449  Antennaria luzuloides L. P. Janeway 2004-6-26 8167 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  UC1523764  Antennaria luzuloides Gary Schoolcraft 1981-7-8 498 Lassen near Coulthurst Flat 1920 Comment
  CHSC92826  Antennaria luzuloides subsp. aberrans Lowell Ahart; John Dittes 2005-6-1 11862 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  JEPS33976  Antennaria rosea Brown and Wieslander 1922-7-23 58 Lassen Martin Sprs.; Eagle Lake Comment
  UCR18725  Antennaria rosea Frank C. Vasek 1975-7-11 750711- 20 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CHSC60304  Antennaria rosea subsp. confinis Mary Ann Showers 1992-6-13 2558 Lassen Lassen Volcanic National Park. Volcanic outcrops southwest of Widow Lake. 2072 Comment
  JEPS95712  Anthemis cotula Vernon H. Oswald and L. Ahart 1995-8-14 7175 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a flooded playa (Mud Flat) 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. Roadside weed. 1348 Comment
  UCD159578  Anthemis cotula D. S. Park 2011-8-24 315 Lassen East of Westwood. Near Goodrich Creek. 319 Comment
  UC1123464  Apocynum androsaemifolium H. P. Hagge 1929-9-12 28 Lassen Logan Mt. Eagle Lake Quad., Logan Mt. Comment
  UCD21048  Apocynum androsaemifolium E. Bortiri 2002-7-19 WFC 84 Lassen Along Rd 35N08, about 8 miles North of Poison Lake and Hwy 44,. Comment
  CAS-BOT-BC392013  Aquilegia Clare B. Hardham 1969-8-28 17453 I Lassen Slope west of Janesville Comment
  CHSC30594  Aquilegia formosa Marc Held 1972-7-7 41 Lassen Collected on the roadside above Gallatin Beach. Comment
  CHSC67063  Aquilegia formosa Willis Ball 1969-6-25 37 Lassen Found in Upper Murrer's Mdw. 1584 Comment
  CHSC4273  Aquilegia formosa var. truncata K. R. Stern 1967-6-24 2404 Lassen Murrer Meadow, ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  SEINET5337698  Aquilegia formosa var. truncata C. G. Gulling 1905-1 1544 Lassen Big Meadows Comment
  RSA0129285  Arabis holboellii var. pinetorum R. C. Rollins, Kathryn W. Rollins 1981-5-31 81176 Lassen Just N of Eagle Lake. Comment
  HSC25977  Arabis holboellii var. retrofracta D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19270 Lassen Harvey Valley near Cone Springs Comment
  RSA716275  Arabis holboellii var. retrofracta L. Ahart 2005-6-2 11926 Lassen Along the poor dirt road, 1/4 mile W of the Anderson Ranch home, Long Valley about 4 3/4 miles air N of the intersection of Scott Road and Hwy 70, 6.5 miles air NW of Hallelujah jct. 1499 Comment
  NY114397  Arabis microphylla var. microphylla Anonymous 1987-6-16 1748 Lassen Skedaddle Mountains 1828.8 Comment
Read comments
Apr 20 2012
  NY119564  Arabis sparsiflora var. sparsiflora D. W. McNeal 1983-6-5 2842 Lassen Above co. rd. #201 above the N shore of Eagle Lake, 2.9 miles W of the jct. of Hwy. 139. Comment
  CAS-BOT-BC407748  Arceuthobium abietinum H. L. Boldenbeck 1910-6-1 s.n. Lassen Lassen National Forest Comment
  CHSC91321  Arceuthobium campylopodum Lowell Ahart; John Dittes 2005-6-1 11894 Lassen On the west side of Scott Road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 5.9 miles (air) northwest of Hallelujah Junction. 1465 Comment
  CDA6788  Arctium minus T. C. Fuller 1959-7-7 4725 Lassen Highway 395 at Secret Creek Bridge, 3.3 miles north of road to Karlo. 0 Comment
  CAS-BOT-BC45895  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  CAS-BOT-BC45906  Arctostaphylos nevadensis Marcus E. Jones 1897-7-7 s.n Lassen Lassen's Peak 1828 Comment
  JEPS38799  Arctostaphylos nevadensis Jos. Grinnell 1928-6-28 Lassen Prospect Mt. 2286 Comment
  RSA46474  Arctostaphylos nevadensis Doris K. Kildale 1926-9-11 2764 Lassen Juniper Lake. 2055 Comment
  NY223210  Arctostaphylos patula P. A. Munz 1947-5-18 11865 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville. 1508.8 Comment
  CAS-BOT-BC42164  Arctostaphylos patula subsp. patula Louella Bass 1974-4-15 151 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC42167  Arctostaphylos patula subsp. patula C. Hart Merriam 1924-8-5 s.n. Lassen Pit River, Ponderosa ride between Big Valley and Pittville Comment
  UCR18731  Arenaria congesta Frank C. Vasek 1975-7-11 750711- 07 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  UC8100  Arenaria congesta var. congesta M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixey Mts. Comment
  CDA23999  Arenaria congesta var. crassula T. C. Fuller 1963-6-11 10661 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  UC71725  Argemone rotundata Mrs. M. H. Manning 1902-9-1 1 Lassen Reno Nevada to Amadee California Amadee Comment
  CHSC84875  Arnica chamissonis Samantha Mackey Hillaire; Linnea Hanson, Catie Bishop 2003-9-21 357 Lassen Lassen Volcanic National Park. Snag Lake; mudflat just N of an open stand of willows on the south shore of the lake; just east of where Grassy Creek flows into the lake. [Label says 'area near' latitude and longitude]. 1900 Comment
  JEPS114706  Arnica chamissonis 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
  UC1533139  Arnica chamissonis Gary Schoolcraft 1986-8-19 1667 Lassen Said Valley Res. 1630 Comment
  UC73900  Arnica chamissonis J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  UC29631  Arnica chamissonis M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  JEPS118465  Arnica chamissonis subsp. foliosa Lowell Ahart, John Dittes 2011-6-21 17534 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  POM203853  Arnica chamissonis subsp. foliosa J. T. Howell 1934-7-8 12512 Lassen Harvey Valley 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
  UCD159572  Arnica cordifolia D. S. Park 2011-6-27 309 Lassen East of Westwood. Growing near Willard Creek. 1700 Comment
  UC36753  Arnica dealbata M. S. Baker and Frank Nutting 1894-7-28 Lassen mts s Eagle Lake Comment
  CDA10134  Artemisia abrotanum E. E. Fix 1964-11-4 Lassen From Soil Conservation Service Nevada. 0 Comment
  CAS-BOT-BC85004  Artemisia arbuscula subsp. arbuscula John Thomas Howell 1934-7-6 12455 Lassen Harvey Valley Comment
  CHSC72214  Artemisia arbuscula subsp. arbuscula Vernon H. Oswald 1998-9-14 9621 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  UC1137582  Artemisia arbuscula subsp. arbuscula A. Simontacchi 1940-9-16 947 Lassen 1.3 mi ne of Ebey Lake; Lassen National Forest, Halls Flat Quadrangle 1691 Comment
  CHSC76079  Artemisia biennis Lowell Ahart; Vernon H. Oswald 1999-9-13 8213 Lassen Just south of the parking area and about 100 yards to the east, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  SBBG95821  Artemisia cana G. K. Helmkamp 1990-9-23 A- 5 Lassen ca. 3 mi E of Susanville, along St Hwy 36 1341 Comment
  CHSC72215  Artemisia cana subsp. bolanderi Vernon H. Oswald; Lowell Ahart 1998-9-14 9622 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  UC1119576  Artemisia cana subsp. bolanderi A. Simontacchi 1940-9-16 950 Lassen 1.3 mi ne Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1119577  Artemisia cana subsp. bolanderi A. Simontacchi 1940-9-16 948 Lassen 1.3 mi ne Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC84828  Artemisia cana subsp. cana Ernest C. Twisselmann 1961-7-21 6572 Lassen Harvey Valley 1981 Comment
  CAS-BOT-BC84830  Artemisia cana subsp. cana Elmer I. Applegate 1897-6-4 853 Lassen Madeline Plains Comment
  CAS-BOT-BC90329  Artemisia douglasiana Clare B. Hardham 1969-8-28 17443 Lassen slope west of Janesville Comment
  RSA518443  Artemisia douglasiana George K. Helmkamp 1990-9-23 G- 9 Lassen N of Ravendale 1677 Comment
  CAS-BOT-BC90778  Artemisia ludoviciana subsp. ludoviciana Louella Bass 1980-5-1 s.n. Lassen Standish, Honey Lake Valley Comment
  SEINET7153395 Image available Artemisia nova A. A. Beetle 1957-8-16 12580 Lassen 8 miles north of Litchfield Comment
  UCD55270  Artemisia spinescens Ellen Dean 2006-5-15 3080 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. Northern part of Johnston property near sandy wash. 1249 Comment
  CAS-BOT-BC97326  Artemisia tridentata subsp. tridentata Clare B. Hardham 1971-8-22 18395 Lassen Diamond Mountain 2346 Comment
  RSA0092309  Artemisia tridentata subsp. tridentata Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31432 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  UC747155  Artemisia tridentata subsp. vaseyana G. Thomas Robbins 1945-10-7 2155 Lassen 2-3 mi ne Burgess Spring (se slope of Harvey Mt.); Lassen National Forest, Harvey Valley 1676 Comment
  UC773962  Artemisia tridentata subsp. vaseyana L. R. Short 1936-9-30 S- 505 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1752 Comment
  CHSC118473  Artemisia tridentata subsp. vaseyana Don Lepley 2016-9-17 Lassen Between Feather Lakes and Highway 44, approximately 5.3 air miles southeast of Bogard Rest Area; a little more than a third of a mile north of railroad crossing on Highway 44. 40N31:46.8 x 121W01:37.1 1743 Comment
  SEINET10580351  Asclepias cordifolia Alice Eastwood, John Thomas Howell 1940-6-11 Eastwood 7995 Lassen Nubieber Comment
  CHSC51995  Asclepias fascicularis Cindy Prouty 1978-7-3 23 Lassen SE Eagle L.--near Eagle Lake Field Station. 1572 Comment
  JEPS123853  Asclepias fascicularis Lowell Ahart, John Dittes 2015-7-14 20325 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CDA10316  Aster lanceolatus subsp. hesperius O. W. Newman Aug 1915 Lassen Susanville. Comment
  CHSC12949  Astragalus K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5811 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  CAS-BOT-BC177433  Astragalus andersonii John Thomas Howell 1934-6-10 11875 Lassen Janesville Comment
  CHSC116920  Astragalus andersonii J. P. Bergmann 2011-4-30 Lassen Fort Sage OHV Recreation Area. 1450 Comment
  NY791375  Astragalus andersonii W. W. Eggleston 1911-5-29 6730 Lassen Vicinity of Doyle Station 1290 Comment
  NY791369  Astragalus andersonii M. J. Williams 1974-8-4 74-L- 83 Lassen About 2 miles west of Highway 395, near Highway 70 1493.5 Comment
  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
  SEINET8358141  Astragalus anxius Unknown 1991-7-16 6108 Lassen Ash Valley ca 25 km W of Madeline, along Ash Valley Rd. 1550 Comment
  CAS-BOT-BC178762  Astragalus canadensis var. brevidens John Thomas Howell 1934-7-8 12504 Lassen Spalding's, Eagle Lake Comment
  POM26215  Astragalus canadensis var. brevidens R. M. Austin 1883-09 42 Lassen Madaline Plains Comment
  RSA415412  Astragalus canadensis var. brevidens Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CAS-BOT-BC178763  Astragalus canadensis var. brevidens John Thomas Howell 1977-8-11 52718 Lassen EAst of Beckwourth Pass, near Halleluja Junction - Sierra Nevada 1554 Comment
  CAS-BOT-BC177844  Astragalus curvicarpus var. curvicarpus Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16331 Lassen 13.5 mi. E of Susanville Comment
  CHSC23432  Astragalus curvicarpus var. curvicarpus K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5816 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  UC1609292  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald and Lowell Ahart 1993-6-14 5519 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the w shore Eagle Lake (ca 2.0 mi ene of Spaulding Tract Rd. (Rd.518,33N89), among low dunes on upper beach btwn road and lake); w shore Eagle Lake 1566 Comment
  UC372641  Astragalus curvicarpus var. curvicarpus Marcus E. Jones, A. M. 1897-6-24 Lassen 10 to 15 mi w from Amedee; w from Amedee 1219 Comment
  CDA26665  Astragalus filipes G. D. Barbe 1982-7-12 3873 Lassen East base of Dry Valley Ridge along Westside Road, 3 miles north of Dry Valley Gap (Thermo-Grasshopper Road), Madeline Plains. Comment
  NY658484  Astragalus filipes T. W. Nelson 1980-7-6 6001 Lassen Likely Quad. Along Adin-Madelin Rd. (Ash Valley road), 16 miles East of Adin in Ash Valley 1554.5 Comment
  NY658493  Astragalus filipes G. H. True Jr. 1938-7-9 911 Lassen Madeline Plains near Termo 1524.0 Comment
  SEINET3140019  Astragalus filipes R. W. Spellenberg 1996-6-13 12334 Lassen 26 km S of Doyle on US Hwy 395 1430 Comment
  CAS-BOT-BC182957  Astragalus filipes John Thomas Howell 1934-6-10 11909 Lassen Madeline Plains near Termo Comment
  RSA339170  Astragalus filipes Margaret J. Williams 1983-7-31 339170 Lassen Ash Valley road, 17 mi. from Aden. 1829 Comment
  CAS-BOT-BC186858  Astragalus gibbsii Louella Bass 1973-6-3 96 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC186862  Astragalus gibbsii Philip A. Munz 1947-5-20 11889 Lassen Milford 1264 Comment
  NY674268  Astragalus gibbsii G. Schoolcraft 1993-6-8 2285 Lassen US Highway 395 at Airport Road 1274 Comment
  SEINET948354  Astragalus gibbsii Philip A. Munz 1947-1 11889 Lassen Milford 1265 Comment
  CAS-BOT-BC186863  Astragalus gibbsii H. D. Ripley; R. C. Barneby 1943-6-13 5692 Lassen South of Milford 1432 Comment
  RSA110068  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1944-5-29 5951 Lassen Constantia 1372 Comment
  RSA110069  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5692 Lassen South of Milford. 1433 Comment
  RSA110067  Astragalus gilensis H. D. Ripley, R. C. Barneby 1944-5-29 5951 Lassen Container 1372 Comment
  CAS-BOT-BC186910  Astragalus inversus M. S. Baker 1898-8-1 529 Lassen Big Valley, near Johnson's Comment
  CAS-BOT-BC27652  Astragalus inversus Townsend Stith Brandegee 1892-7-1 s.n. Lassen Susanville Comment
  OBI77184  Astragalus inversus Anthony Baniaga 2011-7-18 455 Lassen Lassen NF. 3-1/4 mi ESE of Signal Butte. Swains Hole quad. T32N R6E sec 9 NE of SW 1700 Comment
  SEINET3165897  Astragalus inversus R. W. Spellenberg 2006-6-19 13744 Lassen along USFS access road 3.4 km E of Calif. Hwy. 139, the jct. of the road and highway 31 km SE of Modoca Co. line (just S of Adin) 1670 Comment
  UCD18950  Astragalus inversus Raymond D. Ratliff 1965-8-5 42 Lassen Lassen National Forest, Champ's Flat Allot. (CF 21-8). 1743 Comment
  CAS-BOT-BC186944  Astragalus iodanthus G. Schoolcraft 1998-6-30 2744 Lassen N. slope of N. end of Ft. Sage Mtns. 1950 Comment
  POM23664  Astragalus iodanthus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC229049  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC229052  Astragalus lemmonii Alice Eastwood; John Thomas Howell 1940-6-11 7962 Lassen Eastern Fall River Valley Comment
  POM45395  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  UC13384  Astragalus lemmonii M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  RSA0074201  Astragalus lemmonii L. T. Stephenson 1897-09 6448 Lassen Chat, Sierra Valley 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
  NY675496  Astragalus lentiginosus var. chartaceus N. H. Holmgren 1980-7-5 9519 Lassen Upper Smoke Creek drainage, 14.8 km (9.2 miles) east of U.S. Highway 395 via Rye Patch Canyon, 19 km (12 miles) airline distance east-southeast of Ravendale 1680 Comment
  CAS-BOT-BC187154  Astragalus lentiginosus var. chartaceus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49230 Lassen On Highway 395, 7 miles southeast of Milford 1280 Comment
  NY675509  Astragalus lentiginosus var. chartaceus H. D. D. Ripley 1943-6-14 5744 Lassen Hidden Valley east of Susanville 1311 Comment
  POM25710  Astragalus lentiginosus var. floribundus Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  UC13383  Astragalus lentiginosus var. floribundus L. T. Stephenson Sep 1897 Lassen Chat , Chat (Sierra Valley) Comment
  CHSC828  Astragalus lentiginosus var. lentiginosus 1944-6-26 Lassen Eagle Lake. 1584 Comment
  RSA754376  Astragalus lentiginosus var. lentiginosus Brian Knaus 2005-6-14 136 Lassen W of Susanville, at junction of hihways 26 and 44. 1502 Comment
  CHSC67215  Astragalus lentiginosus var. platyphyllidius James D. Jokerst 1991-5-28 3291 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, ca. 400 ft E of the highway on steep slopes above the road, S of a small canyon mouth. 1554 Comment
  RSA109610  Astragalus lentiginosus var. platyphyllidius H. D. Ripley, R. C. Barneby 1943-6-14 5744 Lassen Hidden Valley E of Susanville 1311 Comment
  CHSC64786  Astragalus malacus Vernon H. Oswald 1995-5-31 6814 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 2.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1341 Comment
  UC81230  Astragalus malacus unknown 1892-6-23 Lassen Honey Lake Comment
  NY676232  Astragalus malacus B. J. Cox 1971-6-2 2599 Lassen Hallalujah Jct. intersection of U.S. Highway 395 and Calif. Highway 70 1433 Comment
  RSA0006819  Astragalus malacus H. D. Ripley, R. C. Barneby 1944-5-30 5974 Lassen South of Ravendale. 1677 Comment
  CAS-BOT-BC192841  Astragalus pulsiferae Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC192846  Astragalus pulsiferae Noel H. Holmgren; Patricia K. Holmgren 1980-7-4 9500 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 1890 Comment
  JEPS109744  Astragalus pulsiferae var. coronensis Dean W. Taylor 2005-6-29 19379 Lassen Piute Creek, 3 mi W from western edge Susanville 1310 Comment
  NY621934  Astragalus pulsiferae var. coronensis S. L. Welsh 2001-6-14 28158 Lassen E of Hwy. 395, road to Rams Horn Spring campground 1539.2 Comment
  CAS-BOT-BC192855  Astragalus pulsiferae var. pulsiferae G. Schoolcraft 1989-6-7 1906 Lassen East slope of Shaffer Mtn. Comment
  CHSC91331  Astragalus pulsiferae var. pulsiferae Lowell Ahart; John Dittes 2005-6-1 11871 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  NY694127  Astragalus pulsiferae var. pulsiferae See comments 1981-6-23 614 Lassen West of Susanville 1463 Comment
  SD71380  Astragalus pulsiferae var. pulsiferae John Thomas Howell 1955-7-19 30818 Lassen The Sierra Nevada, Sagebrush flat, east side of Beckwourth Pass 1493 Comment
  SEINET5324574  Astragalus pulsiferae var. pulsiferae M. J. Williams 1974-7-26 74 -L-16 Lassen Burn area, W of Hwy 395 and Near Hwy 70. 1494 Comment
  JEPS54815  Astragalus purshii L. S. Smith 1916-5-22 Lassen Honey Lake Comment
  CAS-BOT-BC194092  Astragalus purshii var. purshii Farris Farris 1935-5-20 s.n. Lassen Three miles southwest of Susanville 1310 Comment
  CHSC107091  Astragalus purshii var. purshii V. Lockie 2010-4-25 Lassen SW of Rice Canyon Road. In the middle of an old logging road. 1618 Comment
  CAS-BOT-BC194089  Astragalus purshii var. purshii C. R. Quick 1964-7-28 64 -84 Lassen Edge of Halls Flat , Black's Mt. Experimental Forest Comment
  CHSC117211  Astragalus purshii var. tinctus Lowell Ahart; John Dittes 2016-6-7 20984 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS114761  Astragalus purshii var. tinctus Lowell Ahart, John Dittes 2008-6-19 14888 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  UC82576  Astragalus spaldingii unknown 1892-6-22 Lassen Honey Lake 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
  UCD105490  Astragalus whitneyi Michael A. Vincent 1999-6-9 8576 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
  SEINET10490007  Astragalus whitneyi var. confusus David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17770 Lassen Approx 12 mi s of adin on calif hwy 139, in basalt and clay; along edge of road On rolling knoll, in artemisia juniper assoc. 1372 Comment
  CAS-BOT-BC200874  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch 2225 Comment
  JEPS108557  Astragalus whitneyi var. siskiyouensis L. P. Janeway 2005-7-4 8469 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  UC1561813  Astragalus whitneyi var. siskiyouensis Barbara Ertter with Gary Schoolcraft 1987-6-16 7183 Lassen open rhyolitic ridge w Hot Springs VABM (Skeedaddle Mountains on ne side of Honey Lake); Skeedaddle Mountains, ne side Honey Lake,l w of Hot Springs 2133 Comment
  UC1567401  Astragalus whitneyi var. whitneyi G. Schoolcraft 1989-6-19 1915 Lassen Ash Valley RNA/ACEC 1554 Comment
  CAS-BOT-BC66017  Athyrium filix-femina var. cyclosorum B. C. Cain 1925-8-24 120 Lassen 1 mile below Drakesbad, Mt. Lassen Nat. Park Comment
  OBI75877  Athysanus pusillus Anthony Baniaga 2011-6-29 399 Lassen Lassen Natl Forest. Fredonyer Pass, S of Willard ck. Fredonyer Pass quad T29N R10E sec 14 NW of SE 1500 Comment
  CHSC64780  Atriplex argentea var. hillmanii Vernon H. Oswald 1995-6-7 6842 Lassen Modoc Plateau. 1.8 mi s of Wendel Rd. (Lassen 320) on an unsigned dirt road near milepost 19.5 just e of Skedaddle Creek, e of Wendel, ne of Susanville. 1231 Comment
  NY652203  Atriplex argentea var. hillmanii G. Schoolcraft 1989-5-16 1874 Lassen West of Highway 395 about 2 miles south of Karlo turnoff 1356.4 Comment
  CHSC76091  Atriplex argentea var. mohavensis Lowell Ahart; Vernon Oswald 1999-9-13 8207 Lassen On the east side of the dirt road and 1/2 mile south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  SEINET5344853  Atriplex canescens S. Massed, Jared Jaggers, D. Mathews 2011-10-24 Seeds of Success. NV 030 . Carson Lassen Northeast of Doyle. On the Northern slopes of Fort Sage Mountains. 1291 Comment
  CAS-BOT-BC170276  Atriplex confertifolia C. B. Wolf 1931-9-5 1279 Lassen Honey Lake Valley, 1/2 mile from Medee R.R. Station on road to Doyle. 1219 Comment
  NY541161  Atriplex covillei H. M. Hall 11683 Lassen 26 miles north of Reno (on road to Doyle) 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
  CHSC71872  Atriplex patula var. obtusa Vernon H. Oswald; Lowell Ahart 1998-9-8 9581 Lassen Ash Creek and Big Swamp 2.2 mi north of Bieber on County Road 91 (Bieber-Lookout Rd.). 1258 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
  JEPS117922  Atriplex truncata L. P. Janeway 2008-8-2 9528 Lassen just above the flats along the south side of Rush Creek Modoc Plateau (south side fo Smokey Creek Ranch Road 1.8 km west of the CA-NV line.) 1349 Comment
  CAS-BOT-BC106488  Balsamorhiza hookeri David D. Keck; J. Clausen 1935-6-24 3747 Lassen 2 mi. S. of Ravendale, in light sandy clay soil with some rock. 1463 Comment
  CAS-BOT-BC106494  Balsamorhiza hookeri Clarence Quick 1963-7-12 63 -38 Lassen Blacks Mountain Experimental Forest east of Halls Flat 1859 Comment
  UCD159570  Balsamorhiza hookeri D. S. Park 2011-6-27 307 Lassen East of Westwood. Growing near Willard Creek. 1471 Comment
  SEINET10617201  Balsamorhiza hookeri Paul Gallian, Billy Joe Cox 1971-6-2 Gallian 476 Lassen Approx. 2 mi. N of Susanville, across CA Hwy. 139 from Lassen Jr. College, in grassland at edge of Jeffery Pine & Artemisia. 1341 Comment
  SEINET7239770 Image available Balsamorhiza hookeri var. hirsuta G. Schoolcraft 1998-7-8 2750 Lassen South of Round Corral Reservoir 1890 Comment
  UC1036000  Balsamorhiza sagittata Helen K. Sharsmith 1955-6-22 4499 Lassen 5 mi beyond Blue Lake on the road to Likely Blue Lake (Warner Mountains, Modoc National Forest); Modoc National Forest, Warner Mountains 1767 Comment
  UC485131  Balsamorhiza sagittata Franklin P. Nutting Lassen Big Valley Mts. Comment
  CAS-BOT-BC16435  Barbarea orthoceras John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49464 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  CHSC5234  Barbarea orthoceras A. Santos 1946-6-12 Lassen Eagle Lake. Pine Creek. 1584 Comment
  CHSC68741  Barbarea orthoceras Vernon H. Oswald; Lowell Ahart 1997-5-27 8501 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi easat of Hwy. 139. On the flood plain of a creek paralleling the road. 1546 Comment
  HSC26602  Barbarea orthoceras D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19166 Lassen 3 mi. N of Westwood Comment
  SEINET10970556  Barbarea orthoceras Katherine L. Morris 1973-5-25 Morris 244 Lassen Collected 13.7 mi nw of the jct of hwy 36 and 44 on hwy 44, in an area of yellow pine, fir, and ribes. Comment
  RSA783700  Bassia hyssopifolia R. R. Halse 2010-8-25 8088 Lassen Along State Hwy 139 ca. 26.2 mi N of Susanville on NE shore of Eagle Lake. 1559 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
  UC1191423  Bassia hyssopifolia Verne Grant and Irving Schneider 1947-9-6 8390 Lassen near Wendel (irrigation ditch w of Fleming Ranch Headquarters) 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
  UCD56795  Beckmannia syzigachne R. Tofsrud 1947-7-1 247 Lassen Between Bieber and Nubieber. Comment
  CHSC96767  Berteroa incana D. McDonald 2005-7-18 1307852 Lassen Modoc Plateau. Lassen County. Hallelujah Junction. Comment
  SEINET11193774  Berteroa incana A. Tiehm 2005-1 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road miles W of Hwy 395 on HWY 70, then 5.5 road miles N on Scott Road. 1494 Comment
  CHSC29876  Berula erecta Robin L. Ondericek 1978-8-8 119 Lassen In water above the dam at Murrers Upper Meadow. 1548 Comment
  NY1102107  Berula erecta R. F. Hoover 1940-10-1 4658 Lassen Near Honey Lake, between Janesville and Standish Comment
  HSC95198  Betula glandulosa Gordon Leppig, J. Cromwell 1997-7-26 599 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC5376  Betula glandulosa M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  HSC95769  Bidens cernua Gordon Leppig, J. Cromwell 1997-7-27 616 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC413000  Bistorta bistortoides A. M. Vollmer; L. Beane 1953-7-1 65 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  HSC22872  Bistorta bistortoides John Pratt 1970-6-13 8 Lassen 1677 Comment
  CAS-BOT-BC128034  Blepharipappus scaber John Thomas Howell 1976-7-20 52032 Lassen In dried depression. about 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  CAS-BOT-BC128041  Blepharipappus scaber Farris Farris 1935-5-20 s.n. Lassen Three miles southwest of Susanville 1341 Comment
  CAS-BOT-BC128046  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-25 3754 Lassen Susanville, on hills just west of town 1310 Comment
  JEPS88876  Blepharipappus scaber Lauramay T. Dempster 1961-6-17 1669 Lassen about 4 mi sw junction with Richmond Road (s of Susanville); Gold Run Creek Comment
  UC1119057  Blepharipappus scaber A. Simontacchi 1940-7-8 5575 Lassen 5.1 mi s of Jelly Camp (Halls Flat); Halls Flat 1699 Comment
  UC1393121  Blepharipappus scaber John L. Strother 1970-5-23 953 Lassen 6 mi n of Honey Lake 1280 Comment
  UC604683  Blepharipappus scaber Farris Farris 1935-5-20 Lassen Susanville 1341 Comment
  UC773892  Blepharipappus scaber L. R. Short 1936-6-10 S- 415 Lassen Burgess Spr. Exp. Range 1798 Comment
  UCD129603  Blepharipappus scaber Glenn W. Turner 1978-7-5 39 Lassen around 1.5 miles south of Termo along California State Highway 395. Comment
  CAS-BOT-BC13905  Boechera lemmonii Eben McMillan 1968-6-28 140 -2 Lassen South slope of Mount Lassen. Comment
  CHSC60731  Boechera pinetorum Vernon H. Oswald; Lowell Ahart 1993-6-3 5488 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), 7.0 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, just S of the ford over Pine Creek, between Poison Lake and Susanville. ON the E side of the road. 1688 Comment
  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
  CHSC75356  Boechera puberula Vernon H. Oswald 1999-5-7 9725 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the S side of the trail just E of Devils Corral Trailhead. 1420 Comment
  JEPS114362  Boechera puberula Lowell Ahart, John Dittes 2008-6-19 14883 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
  UCD114424  Boechera puberula Geo C. Wood 1940-4-18 s.n. Lassen Coffin Ranch near Susanville. Comment
  CAS-BOT-BC25509  Boechera retrofracta John Thomas Howell; Gordon H. True 1973-8-1 50203 Lassen Sierra Nevada. Summit of Diamond Range, south of Susanville. About 3 miles east of Diamond Mountain. 2194 Comment
  CAS-BOT-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
  CHSC11772  Boechera retrofracta Wayne O. Baum 1971-6-28 71 -10 Lassen East slope of Gallatin Peak. 1950 Comment
  UC1143032  Boechera retrofracta L. R. Short 1936-6-1 S- 354 Lassen Burgess Spring Experimental Range Lassen National Forest 1859 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
  CHSC29913  Boechera sparsiflora Robin L. Ondricek 1978-5-25 27 Lassen 1.3 mi N of Pine Creek Bridge on Co. Rd. 518. 1554 Comment
  CHSC36477  Boechera sparsiflora Margaret E. Halloran 1982-6-6 12 Lassen Pine Creek just below fish trap where Pine Crek empties into Eagle Lake. Comment
  CAS-BOT-BC25707  Boechera sparsiflora H. D. Ripley; R. C. Barneby 1943-6-13 5702 Lassen South of Gifford. 1569 Comment
  CAS-BOT-BC25900  Boechera suffrutescens John Thomas Howell 1934-7-10 12537 Lassen Between Harvey Valley and Patterson Flats. Comment
  SEINET10453123  Boisduvalia densiflora Mary Susan Taylor 1982-8-19 Taylor 5032 Lassen T27N R14E ne sec 36. Milford quad. Along dirt rd 326, ca. 0.5 mi e of its jct with Milford Grade, ca. 1 air mi se of Milford. In ditch on roadside; 4300 ft. 1310 Comment
  SD8418  Boykinia major Mrs. R. M. Austin 1877-1 Lassen Spanish Peak Comment
  CAS-BOT-BC149498  Bromus briziformis Louella Bass 1982-6-20 s.n. Lassen 0.5 mile west of Karls. Comment
  UCD57490  Bromus briziformis R. M. Love 1944-7-10 s.n. Lassen South of Ravendale. Comment
  CAS-BOT-BC149584  Bromus carinatus var. carinatus John Thomas Howell 1973-7-10 49778 Lassen Sierra Nevada. Fredonyer Pass. 1737 Comment
  CDA31386  Bromus carinatus var. carinatus D. R. Hill 1968-7-8 Lassen James R. Reynolds ranch, Revendale. 0 Comment
  CHSC118475  Bromus carinatus var. marginatus Don Lepley 2016-7-20 Lassen Eagle Lake Ranger District. Uphill side of Road 29N43.2 at outlet of Aspen Flat (tributary to Baxter Creek). 2026 Comment
  CAS-BOT-BC155940  Bromus commutatus G. Schoolcraft 1986-6-17 1624 Lassen North side of Tuledad Canyon near Nevada state line. 1554 Comment
  JEPS109643  Bromus commutatus Dean W. Taylor 2002-6-21 18169 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 Comment
  UCD58468  Bromus commutatus Beecher Crampton 1954-7-5 2067 Lassen Along Hwy. 36. 5 miles west of Susanville. Comment
  RSA0065491  Bromus commutatus Marion P. Harthill 1974-6-14 s.n. Lassen Madeline. 1524 Comment
  UC1024715  Bromus hordeaceus Leo Whitney 1935-5-20 3098 Lassen 14 mi w of Eagle Lake (Lassen National Forest, Harvey Valley, near dam); Lassen National Forest, Harvey Valley 1737 Comment
  UC1024947  Bromus madritensis subsp. rubens Leo Whitney 1935-6-21 3322 Lassen 13 mi w of n end of Eagle Lake (Squaw Valley); Squaw Valley Comment
  CAS-BOT-BC162179  Bromus orcuttianus John Thomas Howell; Gordon H. True 1973-7-31 50029 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1737 Comment
  CAS-BOT-BC162181  Bromus orcuttianus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49472 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  UC1024828  Bromus racemosus Leo Whitney 1935-6-12 3232 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10 Lassen National Forest; , Fruit Grower's Supply Company, Camp Comment
  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
  UC1131325  Bromus suksdorfii A. Simontacchi 1940-6-8 836 Lassen Lassen National Forest, Halls Flat Ranger Station Halls Flat Ranger Station; Lassen National Forest, Halls Flat Ranger Station 1706 Comment
  CAS-BOT-BC161417  Bromus tectorum John Thomas Howell 1977-6-22 s.n. Lassen Sierra Nevada. About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek. 1432 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
  CHSC13497  Bromus tectorum J. Pitts 1972-6-22 244 Lassen 50 yds. n of Eagle Lake Biology Station. Comment
  UC1024827  Bromus tectorum Leo Whitney 1935-7-12 3233 Lassen Lassen National Forest, Camp 10, Fruit Grower's Supply Company Lassen National Forest; , Camp 10, Fruit Grower's Supply Compa Comment
  UC1131267  Bromus tectorum H. S. Yates 1936-8-12 6085 Lassen McKenzie Meadow 1524 Comment
  UCD59756  Bromus tectorum August L. Hormay 1932-5-20 s.n. Lassen Lassen National Forest. Hat Creek. Comment
  CHSC113088  Calandrinia ciliata Lowell Ahart; John Dittes 2013-7-22 18876 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
  CHSC29951  Callitriche verna Robin L. Ondricek 1978-7-5 94 Lassen At the edge of Mahogany Lake at the ne end. 2057 Comment
  CHSC6270  Calochortus leichtlinii W. Vinyard 1946-6-17 Lassen Mt. Fredonyer, Eagle Lake. 2133 Comment
  UC1537209  Calochortus leichtlinii Gordon H. True Jr. 1936-6-25 533 Lassen n side Hog Flat Reservoir 1524 Comment
  CAS-BOT-BC487966  Calochortus leichtlinii R. Carter 1967-4-27 552 Lassen 1.75 mi w of Eagel Lake Biology Station 1584 Comment
  POM253058  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen Along Highway 36 in the valley east of Fredonyer Pass 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
  CAS-BOT-BC273284  Calycadenia fremontii Barrett Anderson 1986-7-9 3125 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  SEINET196249  Calyptridium umbellatum F. Farris 1936-6-15 Lassen Eagle Lake Rd 1676 Comment
  CHSC60789  Camassia quamash subsp. breviflora Vernon H. Oswald; Lowell Ahart 1993-6-3 5475 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. 1731 Comment
  UC1608997  Camassia quamash subsp. breviflora Vernon H. Oswald and Lowell Ahart 1993-6-3 5475 Lassen between Poison Lake and Susanville (3.7 mi n of Hwy 44 at spur road 32N02E, on se side of Pine Creek Valley); Champs Flat Road, Pine Creek Valley 1731 Comment
  UC726042  Camassia quamash subsp. breviflora A. A. Heller 1938-6-4 15140 Lassen 2 mi e of Westwood 1493 Comment
  CAS-BOT-BC497553  Camassia quamash subsp. breviflora L. Beane; A. M. Vollmer 1953-7-1 92 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  HSC22954  Camassia quamash subsp. breviflora John Pratt 1970-6-21 32 Lassen Seasonally flooded lake edge 1707 Comment
  SEINET3282785 Image available Camissonia boothii subsp. alyssoides Marcus E. Jones 1897-6-23 Lassen Amedee. 1219 Comment
  HSC63958  Camissonia claviformis subsp. cruciformis Teresa Prendusi 1980-5-6 Lassen Honey Lake area Comment
  JEPS107788  Camissonia contorta Lowell Ahart, John Dittes 2005-6-2 11939 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the interesection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1600 Comment
  UCD55153  Camissonia contorta Ellen Dean 2006-5-15 3041 Lassen E of town of Susanville. Along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. 1248 Comment
  CHSC71092  Camissonia pubens Vernon H. Oswald; Lowell Ahart 1998-5-22 9136 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. Roadside banks. 1341 Comment
  NY851778  Camissonia pubens W. W. Eggleston 1911-5-29 6741 Lassen Vicinity of Doyle Station 1290 Comment
  NY852079  Camissonia tanacetifolia P. H. Raven 1963-5-29 18426 Lassen Along U. S. Highway 395 0.9 mile north of Ravendale Comment
  CAS-BOT-BC160858  Camissonia tanacetifolia subsp. tanacetifolia Mrs. C. C. Bruce 1898-6-1 2203 Lassen Susanville Comment
  CAS-BOT-BC160863  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell 1934-7-8 12505 Lassen Spalding's, Eagle Lake Comment
  POM38821  Camissonia tanacetifolia subsp. tanacetifolia Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CAS-BOT-BC160862  Camissonia tanacetifolia subsp. tanacetifolia Hans Leschke 1963-8-28 1870 Lassen Lassen Volcanic National Park. South shore of Snag Lake 1856 Comment
  JEPS107837  Capsella bursa-pastoris Lowell Ahart, John Dittes 2005-6-2 11919 Lassen Near bunkhouse, Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  JEPS124378  Capsella bursa-pastoris Lowell Ahart, John Dittes 2015-7-13 20308 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UCD114153  Capsella bursa-pastoris L. R. Short; J. Warren 1936-6-9 S- 408 Lassen Burgess Spring Experimental Range; around old sheep bed-grounds. 1844 Comment
  CAS-BOT-BC37243  Cardamine breweri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49213 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CHSC68853  Cardamine breweri Vernon Oswald; Lowell Ahart 1997-6-24 8618 Lassen South of Susanville on the north side of Diamond Mtn. at an impoundment on the edge of Forest Rd. 29N43 ca. 7.4 miles east of Gold Run Rd. (29N10), ca. 2.7 mi east of Lassen NF boundary. On the edge of a streamlet entering the impoundment. 2036 Comment
  RSA592547  Cardamine breweri var. breweri S. O. Mattoon 1978-7-10 24 Lassen Lassen County, Blue Lake Camp Ground: 17 miles E of Likely, Southern Warner Mtns, Modoc N Fork. 1890 Comment
  SEINET5341069  Cardamine nuttallii var. nuttallii R. C. Rollins, K. W. Rollings 1981-5-30 81166 Lassen Gold Rund Road toward Sky Line Drive, 10 miles souoth of Susanville. Comment
  CAS-BOT-BC18286  Carex John Thomas Howell; Gordon H. True 1973-8-1 50228 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. Headwaters of Baxter Creek. 2133 Comment
  RSA702447  Carex abrupta L. P. Janeway 2004-6-26 8170 Lassen High Cascade Range; Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat; Blacks Mountain Experimental Forest. 1790 Comment
  CHSC112416  Carex angustata Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18769 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC77240  Carex aurea G. Schoolcraft 1996-9-5 2553 Lassen N. side of Biz Johnson Trail. 1402 Comment
  JEPS100621  Carex douglasii Dean W. Taylor 1974-6-14 3716 Lassen Poison Lake, on Hwy 44 ca. 2 miles W from the junction with Pittville Road 1615 Comment
  JEPS107438  Carex douglasii Lowell Ahart, John Dittes 2005-6-1 11863 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  SEINET10437847  Carex douglasii B. L. Wilson, P. Zika 2011-8-7 16803 Lassen Where route A21 corsses the railroad tracks north of Westwood. 1607 Comment
  UC1924574  Carex douglasii Debra Valov 2006-5-29 2006025 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1279 Comment
  CDA33049  Carex douglasii T. C. Fuller 1963-7-15 10890 Lassen South side of road to Little Valley, 2.9 miles southeast of Pittville. 0 Comment
  UCD140286  Carex douglasii James P. Smith; John Sawyer 1971-5-23 4664 Lassen along California 139, 1 mile south of junction with road to Thermo. Comment
  HSC95229  Carex echinata subsp. echinata Gordon Leppig, Tony LaBanca 1997-6-28 517 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC21304  Carex fracta John Thomas Howell; Gordon H. True 1973-8-1 50176 Lassen Sierra Nevada. Gold Run Creek road south of Susanville, Diamond Range. 1584 Comment
  CHSC77247  Carex fracta G. Schoolcraft 1997-7-30 Lassen Slope of Diamond Mtn. 1889 Comment
  JEPS28382  Carex heteroneura George W. Gillett 1957-7-28 937 Lassen along s margin, Widow Lake Lassen Volcanic National Park, Widow Lake 2072 Comment
  HSC103621  Carex heteroneura Thomas W. Nelson, Jane Nelson 1985-8-10 8024 Lassen Silver Lake, along north side of arm on east side of lake. 1829 Comment
  SEINET7587561 Image available Carex heteroneura George W. Gillett 1957-7-28 937 Lassen Lassen Volcanic National Park, Widow Lake. 2073 Comment
  JEPS63616  Carex hoodii Leland S. Smith 1922-7-18 78 Lassen Martin Springs Meadow, Lassen National Forest Comment
  HSC48181  Carex integra D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19239 Lassen 2 mi. N of Westwood Comment
  CHSC61066  Carex lasiocarpa Vernon H. Oswald; Lowell Ahart 1993-8-3 5752 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. In the NW part of the swamp. 1932 Comment
  HSC103653  Carex lenticularis var. limnophila Thomas W. Nelson, Jane Nelson 1985-8-10 8010 Lassen Along north side of Silver Lake 1829 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
  HSC95300  Carex limosa Gordon Leppig, J. Cromwell 1997-7-27 610 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC31947  Carex microptera John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50699 Lassen Steep rocky slope S and SE of Diamond Mt. 2286 Comment
  UC2015854  Carex microptera Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4447 Lassen Lassen Volcanic National Park. Lassen Peak, above parking area. Comment
  SEINET7568445 Image available Carex multicaulis L. P. Janeway 2001-6-20 7207 Lassen Coble Mountain 7.5' Quad. 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
  SEINET10850315  Carex multicaulis R. Ondricek 1978-6-27 Ondricek 78 Lassen On Coleman Lake Rd., .7 mi ne of Lassen Co. Rd. Al. T32N, R11E, nw quarter of Sec. 34, Fredonyer Peak Quadrangle, 15' in the 1977 Burn. 1951 Comment
  CHSC66271  Carex nebrascensis Vernon H. Oswald; Lowell Ahart 1996-6-24 7882 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. Meadow on the E side of Papoose Creek N of the springs. 1633 Comment
  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
  UC1100497  Carex nebrascensis Verne Grant and Herbert L. Mason 1947-7-9 13301 Lassen 5 mi e Bieber Comment
  CAS-BOT-BC119042  Carex pellita Hans Leschke 1960-8-10 1768 a Lassen Badger Flat 1912 Comment
  CHSC65364  Carex pellita Vernon H. Oswald 1995-8-21 7209 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. 1859 Comment
  SEINET7570891 Image available Carex pellita L. P. Janeway 2003-7-24 7919 Lassen Swain Mountain 7.5' quad. High Cascade Range. Below Forest Service Road 30N14 1.1 km from Road 30N21, small side drainage of upper Susan River 4.6 (air) km west of Clover Valley. 1920 Comment
  CHSC89743  Carex petasata L. P. Janeway 2004-6-26 8139 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18. 1714 Comment
  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
  CHSC43570  Carex praegracilis Lowell Ahart 1974-7-9 540 Lassen Along the edge of the road, near the south edge of Eagle Lake. 1584 Comment
  CHSC77249  Carex praegracilis G. Schoolcraft 1997-7-30 2625 Lassen W slope of Diamond Mtn. 1889 Comment
  CHSC91380  Carex praegracilis Lowell Ahart; John Dittes 2005-6-1 11879 Lassen Near springs on a small hill, about 3/4 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1470 Comment
  SEINET7572130 Image available Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11877 Lassen About 3/4 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1470 Comment
  JEPS109091  Carex preslii D. W. Taylor 2008-6-19 20226 Lassen Unnamed meadow equidistant between Papoose Meadwo and Mahogany Lake Comment
  CAS-BOT-BC118615  Carex raynoldsii George Wilson Gillett 1957-7-29 948 Lassen Trail between Butte Lake and Snag Lake, 1/4 mi above Butte Lake. 1859 Comment
  JEPS28380  Carex raynoldsii George W. Gillett 1957-7-29 948 Lassen along trail between Butte Lake and Sang Lake; Lassen Volcanic National Park 1859 Comment
  HSC48183  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19243 Lassen 2 mi. N of Westwood Comment
  POM81761  Carex sheldonii Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  CDA33169  Carex simulata Gordon Leppig, J. Cromwell 1997-7-27 619 Lassen Modoc National Forest. Blue Lake Ranch Comment
  HSC95226  Carex simulata Gordon Leppig 1998-8-17 1046 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC116620  Carex subfusca George Wilson Gillett 1957-7-26 911 Lassen East Shore of Butte Lake, along water line. 1844 Comment
  CHSC77246  Carex subfusca G. Schoolcraft 1998-7-7 2754 Lassen Along Pine Creek NE of Fredonyer Peak. 1645 Comment
  CAS-BOT-BC116617  Carex subfusca B. Clear 1938-7-14 s.n. Lassen Manzanita Lake, Lassen Park. Comment
  SEINET4170122  Carex subfusca Unknown 1966-6-24 Lassen Above Blue Lake, Warner Mountains, ca. 18 mi airline mi S. E. of Likely 1905 Comment
  SEINET7577217 Image available Carex subfusca George W. Gillett 1957-7-26 913 Lassen Lassen Volcanic National Park, Butte Lake. 1844 Comment
  SEINET7579960 Image available Carex vesicaria George W. Gillett 1957-7-22 879 Lassen Lassen Volcanic National Par, Snag Lake, matin of gravel bars along south shore. 1850 Comment
  CAS-BOT-BC114880  Carex whitneyi John Thomas Howell; Gordon H. True 1973-8-1 50201 Lassen Ca 3 mi SE of Diamond Mt. E slope of Diamond Range S of Susanville. 2194 Comment
  CHSC106687  Castilleja angustifolia Zachary Garcia 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and trail to Indian Springs. 1439 Comment
  JEPS81474  Castilleja angustifolia M. S. Taylor 1982-5-29 4568 Lassen ca 0.5 mi n dirt road paralleling Hwy. 395 jct. with Scott Rd. (ca 20 mi n of Reno) Comment
  UC1483848  Castilleja applegatei G. Schoolcraft 1979-7-5 123 Lassen se of Observation Mountain Lookout (top of Observation Mountain); Observation Mountain 2407 Comment
  CAS-BOT-BC249340  Castilleja applegatei Gary Schoolcraft 1983-7-19 1097 Lassen S. slopes of Fredonyer Pk. 33-12-27 2255 Comment
  CAS-BOT-BC249611  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50645 Lassen South and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC249616  Castilleja applegatei subsp. pinetorum Doris Kildale Gillespie 1930-5-13 9367 Lassen Between Susanville and Janesville 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
  CHSC13732  Castilleja applegatei subsp. pinetorum Cornell Freeman 1973-7-11 5 Lassen Found on Gallatin Pk. on the east side of Eagle Lake. Comment
  CHSC6267  Castilleja applegatei subsp. pinetorum M. West 1946-6-20 Lassen Meadown above Grasshopper Valley. 1645 Comment
  HSC23468  Castilleja applegatei subsp. pinetorum John Pratt 1970-6-21 29 Lassen 1738 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
  JEPS81611  Castilleja applegatei subsp. pinetorum M. S. Taylor and B. Hammond 1982-8-27 5052 Lassen ca 6 air mi sw Doyle; Constantia Quad., Diamond Mts., Crystal Peak Area 2377 Comment
  POM260676  Castilleja applegatei subsp. pinetorum Alice Eastwood, John T. Howell 1940-6-15 8326 Lassen Grasshopper Valley. Comment
  SEINET10818435  Castilleja applegatei subsp. pinetorum Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 152 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  CHSC5897  Castilleja campestris subsp. campestris J. B. Kimsey 1946-6-11 Lassen Pine Creek near Eagle Lake. 1584 Comment
  CHSC60921  Castilleja campestris subsp. campestris Vernon H. Oswald; Lowell Ahart 1993-7-8 5644 Lassen Pittville Rd. (Lassen 111, 36N01) near its intersection with 22N11, 0.4 mi N of Hwy. 44, near the SE end of Poison Lake. 1709 Comment
  JEPS66447  Castilleja campestris subsp. campestris L. R. Heckard and P. Rubtzoff 1971-8-4 2708 Lassen about 10 mi n Termo (along U.S. Hwy 395) Comment
  CHSC115227  Castilleja chromosa B. Castro; L. P. Janeway. 2015-6-5 2094 Lassen Great Basin. Near the SE corner of the Warner Mtns. Along W side of Tuledad Toad ca 3 air mi NE of Dodge Reservoir and 0.5 road-mi S of W end of Tuledad Canyon, on gentle NE-facing slope. 1661 Comment
  JEPS127584  Castilleja chromosa B. Castro with L. P. Janeway 2015-6-5 2094 Lassen Great Basin. Near the SE corner of the Warner Mountains. Along W side of Tuledad Road ca 3 air mi NE of Dodge Reservoir and 0.5 road-mi S of W end of Tuledad Canyon, on gentle NE-facing slope. Little Hat Mtn 7.5' Quad. Comment
  CHSC117183  Castilleja lacera Lowell Ahart; John Dittes 2016-6-7 21021 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC4764  Castilleja lacera R. Carter 1967-7-16 623 Lassen Along side road. Comment
  CHSC66262  Castilleja lacera Vernon H. Oswald; Lowell Ahart 1996-6-24 7842 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau, Montana Meadow. 1633 Comment
  CHSC1714  Castilleja linariifolia 1944-7-5 Lassen Bogard. 1722 Comment
  POM44364  Castilleja miniata Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CAS-BOT-BC241000  Castilleja pilosa Michael A. Vincent 1999-6-9 8584 Lassen Along US Rt. 395, south of Ravendale Fire Station, 1.8 miles north of rest area, and 24.8 miles north of Litchfield 1524 Comment
  RSA0037005  Castilleja pilosa Lowell A. Ahart, John Dittes 2008-6-19 14879 Lassen East bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  RSA637591  Castilleja pilosa Michael A. Vincent 1999-6-9 8584 Lassen Along US Rt. 395, south of Ravendale Fire Station, 1.8 miles north of rest area, and 24.8 miles north of Litchfield. 1524 Comment
  CHSC5911  Castilleja tenuis J. B. Kimsey 1946-6-20 Lassen Grasshopper Valley. 1615 Comment
  JEPS114693  Castilleja tenuis Lowell Ahart, John Dittes 2008-6-20 14944 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  UC1012485  Castilleja tenuis Francis W. Pennell 1940-6-7 25727 Lassen 8 mi e Nubieber (Route 299) 1310 Comment
  UC1137685  Castilleja tenuis L. R. Short and Wm. Gansberg 1936-6-8 S- 394 Lassen Burgess Spring Experimental Range; Lassen Forest 1743 Comment
  UC1143036  Castilleja tenuis L. R. Short and Wm. Gansberg 1936-6-8 S- 394 Lassen Burgess Spring Experimental Range; Lassen National Forest 1743 Comment
  UC1523759  Castilleja tenuis Gary Schoolcraft 1982-6-21 714 Lassen Ash Valley 1584 Comment
  UC773853  Castilleja tenuis L. R. Short and Wm. Gansberg 1936-6-8 S- 394 Lassen Burgess Spring Experimental Range; Lassen Forest 1743 Comment
  SJSU11528  Castilleja tenuis J. W. Tilden 1960-6-27 1514 Lassen by Moonlight Rd, 5 mi E of Westwood 1524 Comment
  UC1281477  Ceanothus X flexilis H. E. McMinn 1941-8-27 5403 Lassen 3.5 mi from Pine Cone Inn (and 5 mi from Nubieber); 5 mi from Nubieber Comment
  SEINET210873  Ceanothus cordulatus N. H. Holmgren, JJ Fay; BLBethers 1970-6-24 4373 Lassen 2 miles west of Westwood at edge of airstrip 1554 Comment
  SEINET5339273  Ceanothus cuneatus W. Priest 1956-4-27 s.n. Lassen 20 mi south of Lassen Park turnoff, Ca. Hwy 36. 762 Comment
  CAS-BOT-BC52047  Ceanothus prostratus A. M. Vollmer; L. Beane 1953-7-1 88 Lassen Along Halls Flat Road, beinning 6 miles West of Susanville to McArthur 1554 Comment
  CHSC107342  Ceanothus prostratus Lowell Ahart; John Dittes 2011-6-20 17496 Lassen Forest floor, about 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC30565  Ceanothus prostratus Sori H. Shad 1970-7-9 22 Lassen Found in Pine area 6 mile east of E.L.B.S. 1524 Comment
  CHSC7727  Ceanothus prostratus Beverly J. Wise 1969-4-21 90 Lassen Approx. 2 mi. past Susanville old dump on old dump road. 1341 Comment
  CHSC6250  Ceanothus velutinus L. Harman 1946-6-23 Lassen Roop mountain. Eagle Lake. 2133 Comment
  CHSC6287  Ceanothus velutinus R. Clicquennoi 1967-7-1 37 Lassen Four miles s of Eagle Lake Biology Station off Gallatin Beach Road. 1554 Comment
  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-BC52436  Ceanothus velutinus var. velutinus M. S. Jussel 1931-9-6 s.n. Lassen On the road to Mt. Lassen, five miles from Westwood 1828 Comment
  OBI4702  Cenchrus longispinus T. C. Fuller 1965-10-13 14198 Lassen On N side of old rd to Susanville, 1 mi W of Johnstonville Comment
  CAS-BOT-BC276999  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen E. side of Hwy 395 to Madelaine, 1.6 mi. n. of Termo Comment
  CDA7223  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen East side of Highway 395 to Madelaine, 1.6 miles north of Termo. 0 Comment
  UCD130019  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen east side of Highway 395 to Madelaine, 1.6 mile north of Termo. Comment
  UCD130020  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen east side of Highway 395 to Madelaine, 1.6 mile north of Termo. Comment
  UCD130022  Centaurea diffusa T. C. Fuller 1962-8-28 9481 Lassen east side of Highway 395 to Madelaine, 1.9 mile north of Termo. Comment
  CDA7344  Centaurea squarrosa Loring White 1950-8-19 Lassen Cramer Ranch. Big Valley. 0 Comment
  UC1181382  Centaurea virgata subsp. squarrosa Darwyn Briggs 1960-7-28 Lassen Big Valley 1264 Comment
  CAS-BOT-BC106029  Centaurea virgata subsp. squarrosa T. C. Fuller 1966-7-20 14961 Lassen On both sides of the road from 0.1 to 0.9 mi. s. of the bridge at Pittville Comment
  SEINET13331058 Image available Centaurea virgata subsp. squarrosa T. C. Fuller 1960-7-26 4873 Lassen 4 mi. N. of Bieber, Big Valley Comment
  JEPS102715  Centaurium exaltatum Vernon H. Oswald 2001-9-26 10057 Lassen Dakin Unit of Honey Lake Wildlife Area. 1219 Comment
  CHSC99741  Cerastium glomeratum Lowell Ahart; John Dittes 2008-6-20 14966 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  UC956834  Ceratophyllum demersum Herbert L. Mason and Verne Grant 1947-7-9 13295 Lassen irrigation ditch 5 mi e Bieber Comment
  UC1136909  Cercocarpus ledifolius var. ledifolius L. R. Short 1936-9-30 S 507 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1783 Comment
  CHSC80142  Chaenactis douglasii Jeanne Boze 1981-6-11 102 Lassen Along roadside, 5.5 mi from Hwy 139 on Horse Lake Road. 1676 Comment
  CDA19743  Chaenactis douglasii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Between Ravendale and Secret Valley. 0 Comment
  CDA10715  Chaenactis douglasii var. achilleifolia T. C. Fuller 1959-7-7 Lassen Highway 395, 1.6 miles south of Ravendale. 0 Comment
  CAS-BOT-BC276618  Chaenactis douglasii var. douglasii John Thomas Howell 1934-7-8 12497 Lassen Spalding's Eagle Lake Comment
  HSC42418  Chaenactis douglasii var. douglasii Barbara Kelly 1977-8-9 560 Lassen 16 1/4 mi. E of Madeline on the dirt road from Adin Comment
  JEPS17749  Chaenactis douglasii var. douglasii Rimo Bacigalupi with G. T. Robbins 1955-7-19 5370 Lassen 10.3 mi se of Adin (along Ash Valley road betw. Adin & Madeline) 1524 Comment
  JEPS107309  Chaenactis stevioides Lowell Ahart, John Dittes 2005-6-1 11893 Lassen On the east side of Scott Road, Long Valley, about 4 3/8 miles (air) north of the intersection of Scott Road and Highway 70, about 5.7 miles (air) northwest of Hallelujah Junction 1460 Comment
  CHSC4937  Chamaebatiaria millefolium W. Lessig 1967-7-15 30 Lassen 1/8 mi se of Eagle Lake Biology Station. 1554 Comment
  POM451345  Chamaebatiaria millefolium J. T. Howell 1934-7-9 12519 Lassen Pine Creek Flat Comment
  UC526157  Chamaebatiaria millefolium John Thomas Howell 1934-7-9 12519 Lassen Pine Creek Flat Comment
  UCD112951  Chamaebatiaria millefolium Al Franklin 1987-7-7 87 - Lassen Eagle Lake Field Station, east shore of Eagle Lake, N of Susanville. 1584 Comment
  JEPS5990  Chamaesaracha nana Frances D. Payne 1929-7-12 77 Lassen near Lost Lake (camp 1, se extremity of Warner Mountains); Warner Mountains 2286 Comment
  UC1523765  Chamaesaracha nana Gary Schoolcraft 1981-7-1 493 Lassen e slopes Roop Mountain 2133 Comment
  UC1609091  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1993-7-8 5660 Lassen 1.9 mi n Hwy 44 (Pittville Rd., on se edge of lake, between the rr and the lake); Poison Lake 1709 Comment
  CHSC6213  Cheilanthes gracillima P. Balch 1955-6-1 Lassen Silver Lake, Eagle Lake. 1981 Comment
  CHSC105236  Chenopodium berlandieri Lowell Ahart; John Dittes 2010-7-31 17021 Lassen About 40 yards west of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  UC1949078  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen ca 3/4 mi ENE of Beckwourth Pass Comment
  UC1949076  Chenopodium desiccatum Barbara Ertter 1988-7-25 7871 Lassen ridge of Diamond Mts. ca 1.5 mi E of Diamond Peak, ca 10 airmiles due S of Susanville; spur on N-face. Comment
  SEINET4171909  Chenopodium leptophyllum M. J. Williams 1974-7-26 74 -L-36 Lassen 2 miles west of Hallelujah Junction, south of HWY 70 1494 Comment
  CHSC58839  Chenopodium nitens Vernon H. Oswald; Lowell Ahart 1992-7-16 5103 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. 1745 Comment
Read comments
Nov 1 2014
  JEPS87185  Chenopodium nitens Vernon H. Oswald and Lowell Ahart 1992-7-16 5103 Lassen Long Lake on the S side of Hwy 44 between Oldo Station and Susanville, 1.2 mi SE of County Road A21. 1745 Comment
  CHSC66862  Chenopodium rubrum var. humile Vernon H. Oswald; Lowell Ahart 1996-9-10 8279 Lassen Mountain Meadows Reservoir SW of Westwood. On the embankment of the railroad at the northwest edge of the reservoir. 1539 Comment
  UC1483846  Chimaphila menziesii G. Schoolcraft 1980-7-29 344 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  UC1483847  Chimaphila umbellata G. Schoolcraft 1980-7-29 343 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  UCD149985  Chorispora tenella William Anderson 1963-5-7 s.n. Lassen Milford. Comment
  CHSC64884  Chorizanthe watsonii Vernon H. Oswald; Lowell Ahart 1995-6-19 6891 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. In small openings between brush on a slope on the n side of the road. 1383 Comment
  CAS-BOT-BC36277  Chrysolepis sempervirens John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49413 Lassen Elysian Valley, west of Janesville 1325 Comment
  UCSB62935  Chrysolepis sempervirens Sarr, Dan 1995-7-31 Lassen within crater of Crater Mountain 670 Comment
  SEINET7450655 Image available Chrysopsis villosa var. minor R. R. Halse 2010-8-26 8091 Lassen Along State HWY 70 at Beckwourth Pass about 4.3 miles west of its junction with US HWY 395 or 1.6 miles east of Sierra Valley 1584 Comment
  UC773961  Chrysothamnus humilis L. R. Short and J. Warren 1936-8-17 S- 495 Lassen Burgess Spring Experiment Range Lassen Forest 1760 Comment
  SEINET3392549  Chrysothamnus nauseosus subsp. hololeucus E. D. McArthur 1982-1 EDM- 1358 Lassen NW of Janesville @ jct of CO ros 205 & 219 Comment
  UCD35728  Chrysothamnus viscidiflorus Beecher Crampton 1960-6-18 5709 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD38333  Chrysothamnus viscidiflorus Beecher Crampton 1954-5-11 1883 Lassen Beckwourth Pass. 1588 Comment
  CHSC7637  Chrysothamnus viscidiflorus subsp. puberulus Beverley J. Wise 1969-9-29 15 Lassen 4.5 mi. north of Susanville on Hwy 139. Roadside. 1371 Comment
  CAS-BOT-BC105909  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 1271 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  RSA252470  Chrysothamnus viscidiflorus var. lanceolatus R. F. Thorne, C. W. Tilforth 1969-9-6 39267 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  CAS-BOT-BC162754  Chylismia claviformis subsp. cruciformis Elmer I. Applegate 1934-5-4 8917 Lassen Secret Valley Comment
  JEPS17735  Chylismia claviformis subsp. cruciformis Rimo Bacigalupi with G. T. Robbins 1955-7-21 5424 Lassen s Smoke Cr. Ranch Rd. (17.5 mi e of US 395 and 1.3 mi w of Nev. State line); Rush Cr. 1353 Comment
  UC1602277  Chylismia claviformis subsp. cruciformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3399 Lassen Amedee Honey Lake Valley Comment
  SEINET5344414  Chylismia claviformis subsp. cruciformis F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  CHSC42574  Cicuta douglasii Vernon Oswald 1986-7-22 2222 Lassen Hwy 36, 6.0 mi e of the Plumas-Lassen County line. 1524 Comment
  CDA38208  Cicuta douglasii T. C. Fuller 1965-8-26 14041 Lassen North side of old highway to Johnstonville, 5 miles east of Susanville. 0 Comment
  CHSC23554  Cirsium andersonii W. O. Baum 1971-7-6 49 Lassen Slope of Gallatin Peak. 1981 Comment
  RSA746510  Cirsium andersonii K. M. Meyer, A. Townesmith 2007-7-21 143 Lassen Lassen National Forest. CA, 1.3 mi. on road 110, off Hwy A21, 1821 Comment
  UC1136774  Cirsium andersonii L. R. Short and D. Gish 1936-7-15 S- 489 Lassen Burgess Spr. Exp. Range Lassen Forest 1825 Comment
  CAS-BOT-BC277935  Cirsium canovirens T. C. Fuller 1959-7-7 2739 Lassen Hwy. 395, 6 miles north of the road to Karlo Comment
  CDA15026  Cirsium cymosum B. Villegas 1998-8-18 s.n. Lassen Cascade Range; Hwy 299, 1 mi. W of Big Valley Summit (0.3 mi. W of milepost 7.5). Comment
  CHSC75452  Cirsium cymosum Vernon H. Oswald 1999-6-9 9740 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.4 mi west of Hwy. 395. Along the road. 1356 Comment
  CAS-BOT-BC278002  Cirsium cymosum Peter H. Raven; Otto T. Solbrig 1958-6-17 13279 Lassen Along United States Highway 395, 13.1 miles south of Ravendale Comment
  CAS-BOT-BC278003  Cirsium cymosum Mrs. H. C. Cantelow 1940-5-31 s.n. Lassen 5 miles east of McArthur, Hy. 299 Comment
  CAS-BOT-BC278011  Cirsium cymosum T. C. Fuller 1959-7-7 2740 Lassen 7 mi N/road to Karlo Comment
  RSA0070595  Cirsium cymosum Michael A. Vincent 1999-6-9 8575 Lassen Bureau of Land Management land, Madeline Plains. Southwest of US Rt. 395, southeast of CR 515 (Termo Road), S of BLM road 1614, and southwest of Termo. Along jeep road to Schott Canyon. Comment
  UC773846  Cirsium cymosum var. cymosum L. R. Short and Wm. Gansberg 1936-7-9 S- 479 Lassen Burgess Spring Experiment Range 1807 Comment
  RSA0070618  Cirsium douglasii var. breweri F. W. Peirson 1926-6-22 6824 Lassen Near Hot Springs, Drakesbad, Mount Lassen National Park. 1677 Comment
  CDA1261  Cirsium inamoenum T. C. Fuller 1980-8-5 20312 -C Lassen 28 km NE of Ravendale; east shore of Dodge Reservoir, 0.4 km east of campground. Comment
  SEINET7144190  Cirsium occidentale var. candidissimum Noel 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 junction with Calif 70 (Halleluja Junction).; 0 1524 Comment
  CDA32840  Cirsium ochrocentrum CDFA Staff 1985-6-3 Lassen Madelaine Plains 0 Comment
  JEPS109645  Cirsium scariosum Dean W. Taylor 2002-6-21 18176 Lassen Windmill Flat (lying ca. 1.5 mi NW of Snider Lake), north end of the flat near the base of the windmill 1706 Comment
  LA202501  Clarkia gracilis subsp. gracilis Brian Le Neve; 1996-7-4 84 Lassen between Lake Almanor and Susanville on State Highway 36 Comment
  CAS-BOT-BC163165  Clarkia lassenensis Louella Bass 1983-6-10 6 -83 Lassen Lassen College Campus, Susanville Comment
  UC506933  Clarkia rhomboidea George A. Fischer, Irwin H. Johnson 1933-7-14 F 246 Lassen Lassen Forest 1767 Comment
  UC773908  Clarkia rhomboidea L. R. Short and Wm. Gansberg 1936-7-3 S- 358 Lassen Burgess Spring Experiment Range Lassen Forest 1847 Comment
  CAS-BOT-BC440042  Claytonia perfoliata subsp. perfoliata Louella Bass 1973-4-23 25 Lassen Elysian Valley. 1325 Comment
  JEPS126532  Claytonia rubra subsp. rubra Lowell Ahart, John Dittes 2016-6-7 21012 Lassen 5 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  UC773923  Claytonia rubra subsp. rubra L. R. Short and Wm. Gansberg 1936-6-2 S- 359 Lassen Burgess Spring Experimental Range; Lassen Forest 1865 Comment
  CHSC68621  Cleome platycarpa Vernon H. Oswald; Lowell Ahart 1997-5-7 8403 Lassen Smoke Creek Ranch Rd. 3.4 mi west of the CA-NV state line. Growing in disturbed roadside gravel. 1420 Comment
  POM93741A  Cleomella parviflora Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC423226  Cleomella plocasperma G. Schoolcraft 1986-6-11 1620 Lassen About 1 mile west of CA-NV stateline along Smoke Creek Road. 1341 Comment
  NY242079  Cleomella plocasperma R. F. Hoover 1940-9-29 4642 Lassen Litchfield. Comment
  CHSC23569  Collinsia parviflora W. O. Baum 1971-7-6 38 Lassen E slope of Gallatin Peak. 1950 Comment
  CHSC36478  Collinsia parviflora Margaret E. Halloran 1982-6-6 11 Lassen Pine Creek jst below fish trap where Pine Creek empties into Eagle Lake. Comment
  JEPS107462  Collinsia parviflora Lowell Ahart, John Dittes 2005-6-1 11858 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS23850  Collinsia parviflora Peter H. Raven, Otto T. Solbrig 1958-6-16 13249 Lassen 4.5 mi e Westwood (on St Hwy 36) Comment
  UC1032573  Collinsia parviflora A. Simontacchi 1940-5-10 691 Lassen 7.3 mi w of Harvey Mountain Lookout (Lassen National Forest); Lassen National Forest 1752 Comment
  HSC68935  Collinsia parviflora Gary Schoolcraft 1979-5-1 15 Lassen Along road between Big Springs and Shearing Corrals 1677 Comment
  HSC75886  Collinsia torreyi D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19258 Lassen Harvey Valley near Cone Springs Comment
  HSC75889  Collinsia torreyi D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19259 Lassen Harvey Valley near Cone Springs Comment
  JEPS21731  Collinsia torreyi var. torreyi L. R. Short 1936-6-25 S- 455 Lassen Burgess Spr. Exp. Range; Lassen Forest 1752 Comment
  CHSC7767  Collomia grandiflora Beverley J. Wise 1969-6-1 75 Lassen N.E. city limits of Susanville, on Chestnut, at intersection with Hwy 139. 1310 Comment
  OBI77560  Collomia grandiflora Anthony Baniaga 2011-7-5 419 Lassen Lassen Natl Forest. E of Willard Ck. Fredonyer Pass quad T29N R10e sec 25 NE of NW Comment
  SEINET2445250  Collomia grandiflora Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9502 Lassen Observation Peak, south side of mountain. 18 km (11 mi) airline distance east of Ravendale.; 0 1890 Comment
  JEPS17747  Collomia linearis Rimo Bacigalupi with G. T. Robbins 1955-7-20 5407 Lassen 4.4 mi s Patterson Ranger Sta.; southern end of Warner Mountains, Modoc National Forest, Lon 2057 Comment
  CHSC98582  Collomia tinctoria B. Castro; L. P. Janeway 2005-7-10 1493 Lassen Northern High Sierra Nevada. Crest of the Diamond Mtns, overlooking Janesville and Honey Lake, 0.15 mi N of Rd 28N01 and 0.4 mi E of its junction with Janesville Grade (Rd 29N01/Rd 208). Knoll on N side of crest, in soft decomposed granite soil among rounded granite boulders. 1859 Comment
  CHSC66260  Comarum palustre Vernon H. Oswald; Lowell Ahart 1996-6-24 7891 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. At the springs on the E side of the meadow. 1633 Comment
  HSC95333  Comarum palustre Gordon Leppig, Tony LaBanca 1997-6-29 525 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC7713  Convolvulus arvensis Beverley J. Wise 1969-6-4 33 Lassen 10 mi. east of Susanville on Hwy 395 (Janesville). 1310 Comment
  POM33281  Conyza canadensis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CHSC77234  Cordylanthus ramosus G. Schoolcraft 1999-8-10 2873 Lassen S. of Doyle Grade about 2.5 mi. w. of Doyle, CA. 1584 Comment
  UC761797  Cordylanthus ramosus R. F. Hoover 1940-9-28 4640 Lassen Leavitt Comment
  CAS-BOT-BC212206  Cornus sericea Philip A. Munz 1947-5-20 11887 Lassen Laufman Forestry Public Camp Ground above Milford 1524 Comment
  CHSC77215  Corydalis caseana subsp. caseana G. Schoolcraft 1997-8-6 2657 Lassen Along w. fork of Gold Run Creek about 8 miles sw of Susanville. 1859 Comment
  UC773983  Crepis acuminata L. R. Short 1936-7-9 S- 509 A Lassen Burgess Spring Experiment Range Lassen <National> Forest 1818 Comment
  CAS-BOT-BC290392  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2294 Lassen South slope Thompson Peak, south of Janesville 2133 Comment
  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
  UC773981  Crepis intermedia L. R. Short 1935-7-9 S- 509 B Lassen Burgess Spring Experiment Range 1818 Comment
  UC91874  Crepis intermedia T. S. Brandegee 1892-7-26 Lassen near Honey Lake; Milford Comment
  CAS-BOT-BC291572  Crepis modocensis subsp. modocensis G. L. Stebbins; J. A. Jenkins 1937-7-10 2277 Lassen Diamond Mt. 2286 Comment
  CAS-BOT-BC376532  Crepis monticola G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-6 2193 Lassen Susanville, just west of the town, on Inspiration Point Comment
  UC1143044  Crepis monticola L. R. Short and J. Warren 1936-6-23 S- 444 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1839 Comment
  UC773982  Crepis monticola L. R. Short and J. Warren 1936-6-23 S- 444 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1839 Comment
  UC1136843  Crepis occidentalis L. R. Short and W. Gansberg S- 361 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1871 Comment
  UC581316  Crepis occidentalis subsp. costata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2221 Lassen 6 mi s Ravensdale 1676 Comment
  SEINET2142793 Image available Crepis occidentalis subsp. occidentalis Noel H. Holmgren, Holmgren, Patricia K. 1978-6-11 8929 Lassen upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale 1700 Comment
  UC1587077  Crocidium multicaule G. Schoolcraft 1991-5-6 2131 Lassen 4.5 mi s Adin (along Hwy 139) 1325 Comment
  SJSU10956  Croton setiger V. Hardham 1965-7-12 122 Lassen 12.4 mi NE of Susanville on Hwy 139 1493 Comment
  CHSC23567  Cryptantha affinis W. O. Baum 1971-7-6 28 Lassen E slope of Gallatin Peak. 1950 Comment
  SBBG6231  Cryptantha affinis H. and M. Dearing 1938-6-30 2226 Lassen ca. 50 mi W of Susanville Comment
  NY1112275  Cryptantha ambigua B. J. Ertter 1987-6-16 7199 Lassen Skeedaddle Mountains on northeast side of Honey Lake; saddle on east side of Hot Springs Peak 2195 Comment
  CAS-BOT-BC189326  Cryptantha circumscissa John Thomas Howell 1934-6-10 11852 Lassen 4 miles S of Omira Comment
  UC699733  Cryptantha circumscissa Farris Farris 1936-6-5 Lassen Airport, Susanville Susanville 1280 Comment
  HSC63772  Cryptantha flavoculata Teresa Prendusi 1980-5-22 1125 Lassen Shaffer Mtn. near top 2012 Comment
  UC1562830  Cryptantha humilis Barbara Ertter with Gary Schoolcraft 1987-6-16 7182 Lassen w of Hot Springs VABM (on ne side of Honey Lake); Skeedaddle Mountains, Honey Lake 2133 Comment
  SJSU5810  Cryptantha intermedia J. W. Tilden 1958-6-27 1294 Lassen Madeline Comment
  SDSU20598  Cryptantha intermedia var. hendersonii Ronald B. Kelley 2005-6-30 897 Lassen Western end of Skedaddle Mountains along BLM road from Wendel to Smoky Ranch Rd., 5.1 miles north of paved road junction, north of Wendel. 1538 Comment
  POM72585  Cryptantha torreyana Marcus E. Jones 1897-6-25 7102 Lassen Susanville. 1341 Comment
  UC24702  Cryptantha torreyana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  NY1112083  Cryptantha watsonii B. J. Ertter 1987-6-16 7187 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  SEINET8191424  Cryptantha watsonii F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  UC570279  Cupressus bakeri D. Dunning 1935-11-17 Lassen 2 mi e Burney Spring; Burney Quadrangle 1463 Comment
  UC1541364  Cycladenia humilis var. humilis H. E. and S. T. Parks 1928-6-20 Lassen Mt. Lassen, Drakesbad 2133 Comment
  RSA0049616  Cymopterus terebinthinus var. californicus Dean Wm. Taylor 2012-6-7 21237 Lassen Diamond Mountains; Gold Run Road 0.3 miles North of the crest 1950 Comment
  CHSC66868  Cyperus squarrosus Vernon H. Oswald; Lowell Ahart 1996-9-10 8276 Lassen Mountain Meadows Reservoir SW of Westwood. Along the receding marshy edge of the reservoir between the railroad and Indian Ole Dam. 1539 Comment
  CAS-BOT-BC114056  Cyperus squarrosus George Wilson Gillett 1957-9-4 1125 Lassen Widow Lake. East margin of lower lake, near inlet in drying mud. 2072 Comment
  CHSC117185  Cystopteris fragilis Lowell Ahart; John Dittes 2016-6-7 21007 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UC1037350  Cystopteris fragilis Leo Whitney 1935-5-26 3142 Lassen 10 mi e Adin (lava bluff at Ash Creek) Comment
  SEINET6629019  Cystopteris fragilis M. J. Williams 1970-7-4 s.n. Lassen Ash Creek, SE of Adin 1280 Comment
  CHSC60782  Damasonium californicum Vernon H. Oswald; Lowell Ahart 1993-6-14 5507 Lassen Lassen A21 (32N02), 2.1 mi E of Lassen 105 (32N28Y), on the SE side of Pine Creek Valley, ca. 8 mi (air) W of Eagle Lake. 1728 Comment
  CDA35647  Damasonium californicum J. R. Keck Jr. 1985-7-18 PDR# 330136 Lassen Ballard Reservoir; Near Old Station. Lassen National Forest. 0 Comment
  RSA323646  Damasonium californicum A. Tiehm, Gary Schoolcraft 1984-8-14 9245 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1699 Comment
  HSC68921  Danthonia californica Gary Schoolcraft 1980-7-28 329 Lassen E of Tule Mountain and S of Blue Lake. 2043 Comment
  UC1024948  Danthonia californica var. americana Leo Whitney 1935-6-28 3321 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  CAS-BOT-BC192330  Danthonia unispicata John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50691 Lassen South and southeast of Diamond Mt. 2286 Comment
  CHSC48859  Dasiphora fruticosa Vernon Oswald 1986-8-7 2270 Lassen Hwy 36, 12.6 mi e of the Lassen-Plumas County line, 0.8 mi e of Fredonyer Pass. Roadcut. 1706 Comment
  UC1924204  Deinandra lobbii Debra Valov 2005-8-20 2005220 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC71132  Delphinium andersonii Vernon H. Oswald; Lowell Ahart 1998-5-22 9125 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  UC1136878  Delphinium andersonii L. R. Short 1936-5-12 S- 347 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1834 Comment
  UC1334520  Delphinium andersonii G. A. L. Mehlquist and J. A. Jenkins 1940-5-31 21 Lassen Route 395 3.3 mi n Ravensdale 1584 Comment
  UC1924575  Delphinium andersonii Debra Valov 2006-5-29 2006026 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1275 Comment
  UC579715  Delphinium andersonii David D. Keck and J. Clausen 1935-6-24 3748 Lassen 2 mi s Ravendale 1464 Comment
  UC726248  Delphinium andersonii A. A. Heller 1938-6-23 15217 Lassen flat along US Hwy 395 between Termo and Madeline 1524 Comment
  UC854041  Delphinium andersonii A. A. Heller 1938-6-23 15217 Lassen flat along US Hwy 395 between Termo and Madeline 1524 Comment
  CHSC5070  Delphinium depauperatum D. L. Stites 1967-7-4 106 Lassen Ca. 8 mi s of Eagle Lake Biology Station, Deans Meadow. 1950 Comment
  OBI75897  Deschampsia cespitosa Anthony Baniaga 2011-8-17 508 Lassen Lassen Natl Forest. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E sec 31 SW of SW 1978 Comment
  CAS-BOT-BC194258  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1943-7-10 49769 Lassen Near Westwood - Sierra Nevada 1554 Comment
  CAS-BOT-BC194262  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1959-9-23 34888 Lassen Juniper Lake north end, Lassen Park 2057 Comment
  CAS-BOT-BC194263  Deschampsia cespitosa subsp. cespitosa G. S. Crew 1927-7-15 57 Lassen Feather Lake, Lassen Forest 1737 Comment
  CHSC113927  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2014-8-20 19719 Lassen All over the meadow, 0.8 mile west of Forest Road 32N22 (Westwood Logging Road), about 4.2 miles southeast (by road) from Bogard Rest Area on the south side of Highway 44. 1894 Comment
  CHSC29861  Deschampsia danthonioides Robin L. Ondricek 1978-7-15 102 Lassen Where the spring arises above the dam at Murrers Upper Meadow. 1548 Comment
  HSC69076  Deschampsia danthonioides Gary Schoolcraft 1980-7-16 313 Lassen Near Nelson Corral Reservoir. 1805 Comment
  SACT000919  Deschampsia danthonioides Malcolm Nobs, S. Smith 1949-7-21 Lassen Shallow marshy stream from springs, 4 miles north of Madeline. Comment
  UC1131557  Deschampsia danthonioides A. Simontacchi 1940-6-4 813 Lassen 14.8 mi. w. Harvey Mt. Lookout; Lassen Nat'l Forest, Halls Flat Quad. Comment
  UC1131558  Deschampsia danthonioides Robert W. Gardner 1937-6-20 G- 21 Lassen Burgess Spring Halls Flat Quad., Burgess Spring Comment
  UC1131559  Deschampsia danthonioides A. Simontacchi 1940-6-15 873 Lassen 6.4 mi. w.-n.w. Cone Mt.; Lassen Nat'l Forest, Halls Flat Quad. Comment
  CAS-BOT-BC201807  Deschampsia elongata George W. Gillett 1957-7-28 925 Lassen Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake 1859 Comment
  CAS-BOT-BC201814  Deschampsia elongata John Thomas Howell; Gordon H. True 1973-8-1 50181 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  JEPS28059  Deschampsia elongata George W. Gillett 1957-7-28 935 Lassen Widow Lake 2072 Comment
  CHSC7706  Descurainia incana Beverley J. Wise 1969-4-29 38 Lassen 3.4 mi. north of Susanville on Rnd Valley Rd off Hwy 139. 1371 Comment
  CHSC60884  Descurainia incisa subsp. filipes Vernon H. Oswald; Lowell Ahart 1993-7-8 5656 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Along a ridge between the railroad and the lake. 1709 Comment
  CHSC4784  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected outside cafeteria, N side, 15 yds. from building. Eagle Lake Biology Station. Comment
  UC1143030  Descurainia pinnata L. R. Short and W. McNulty 1936-6-15 S- 435 Lassen Burgess Spring Experimental Range; Lassen National Forest 1833 Comment
  SEINET10480969  Descurainia pinnata Jeffrey Huber 1971-6-2 Huber 134 Lassen 6 mi n of halleluja jct on u.s. Hwy 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC43485  Descurainia sophia Al Simontacchi 1940-6-8 828 Lassen Lassen Forest. Halls Flat Ranger Station. 1706 Comment
  CHSC13510  Descurainia sophia J. Pitts 1967-6-23 269 Lassen Front of Vesta Holt Hall, Eagle Lake Biology Station. Comment
  JEPS114350  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
  SD8289  Dicentra formosa Mrs. R. M. Austin Aug 1882 Lassen Comment
  CAS-BOT-BC500987  Dichelostemma multiflorum Alice Eastwood; John Thomas Howell 1940-6-11 7971 Lassen Big Valley Mts. Comment
  CHSC14038  Dieteria canescens var. shastensis S. Villard 1973-7-12 62 Lassen Slopes of Galatin Peak. Comment
  UC1119608  Dieteria canescens var. shastensis H. S. Yates 1936-8-11 6077 Lassen near Johnstonville; Susanville Quad. Comment
  HSC103593  Dieteria canescens var. shastensis Thomas W. Nelson, Jane Nelson 1986-6-23 8140 Lassen Along State Route 44, 10.9 mi. SE of Old Station junction. 1585 Comment
  CAS-BOT-BC153675  Diplacus mephiticus M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC153682  Diplacus mephiticus Margaret Williams; Steven Williams 1974-7-26 74 - L - 35 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC153683  Diplacus mephiticus Mike Vasey 1990-6-30 9050 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CHSC13945  Diplacus mephiticus M. S. Taylor 1974-7-6 311 Lassen On Gallatin Peak overlooking Gallatin Beach, ca. 13 mi nw of Susanville. Comment
  CHSC36479  Diplacus mephiticus Margaret E. Halloran 1982-6-6 10 Lassen Pine Creek just below fish trap where Pine Creek empties into Eagle lake. Comment
  SEINET13702844  Diplacus mephiticus G. Schoolcraft 1980-5-7 225 B Lassen Honey Lake Island. 1219 Comment
  CAS-BOT-BC151429  Diplacus nanus John Thomas Howell 1962-6-19 37887 Lassen 3 mi. s. of Hallelujah Junction - Sierra Nevada 1524 Comment
  SBBG15309  Diplacus torreyi H. and M. Dearing 1938-7-1 2245 Lassen 17 mi W of Susanville Comment
  CDA6686  Dipsacus fullonum T. C. Fuller, Lee Wheeler 1959-7-23 2820 Lassen Nubieber. 0 Comment
  CDA31694  Distichlis spicata T. C. Fuller 1959-7-7 4733 Lassen Hwy 395 just east of Standish. 0 Comment
  UC38076  Distichlis spicata J. Burtt Davy June 17-24 1897 3304 Lassen Honey Lake Valley Comment
  SACT001016  Distichlis spicata var. stricta Verne Grant, Irving Schneider 1947-9-5 Lassen Rhizomatous, northwest shore of Eagle Lake Comment
  CAS-BOT-BC136178  Dodecatheon alpinum A. M. Vollmer; L. Beane 1953-7-1 90 Lassen Along Halls Flat Road, beginning 6 miles wet of Susanville to McArthur 1554 Comment
  CHSC36491  Dodecatheon alpinum Theresa Costa 1982-6-4 35 Lassen Murrers Upper Meadow. Comment
  JEPS87428  Dodecatheon conjugens Vernon H. Oswald and Lowell Ahart 1993-5-12 5381 Lassen Forest Rd. 32N08 to Crater Lake 0.5 mi ne Hwy 44 (between A21 (to Westwood) and Poison Lake, edge of meadowy opening along creek); Pine Creek 1737 Comment
  UC1951077  Dodecatheon conjugens Debra Valov 2009-4-25 2009014 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC117297  Downingia bacigalupii Lowell Ahart; John Dittes 2016-7-13 21116 Lassen Strand of the pond, 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS120905  Downingia bacigalupii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18738 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS21587  Downingia bacigalupii Calvin McMillan 1949-6-15 1543 Lassen w of Bieber (nw Lassen County (corner)) Comment
  POM312397  Downingia bacigalupii Verne Grant, Irving Schneider 1947-7-31 8209 Lassen Irrigation ditch NE quarter of George Williams section 19, Madeline Plain. Comment
  UC1609180  Downingia bacigalupii Vernon H. Oswald and Lowell Ahart 1993-6-28 5612 Lassen ne of Poison Lake (n of Hwy 44 on Rd 33N06, nne of Burgess Meadow, on the sse flank of Harvye Mtn); Harvey Mtn. 1798 Comment
  UCD33603  Downingia bacigalupii Beecher Crampton 1970-6-26 8637 a Lassen Lassen County, ca. 5 miles west of Susanville. 1524 Comment
  SBBG126109  Downingia bacigalupii L. Ahart, J. Dittes 2010-7-31 17013 Lassen ca 2300 feet N of where rd crosses Hunsinger Draw, 1.9 mi NW of Moll Reservoir, 2.8 mi W of Ash Valley, 8.4 mi SE of Adin 1510 Comment
  CHSC59527  Downingia bicornuta Mary Meyer 1980-7-9 506 Lassen Horse Camp Springs, down-stream in cow pod. 1706 Comment
  UC1101473  Downingia bicornuta var. bicornuta Herbert L. Mason and Verne Grant 1947-7-9 13291 Lassen 5 mi e Bieber Comment
  JEPS19680  Downingia insignis Rimo Bacigalupi with S. Galen Smith and Geo. Bacigalupi Jr. 1957-6-28 6000 Lassen 3.1 mi s Madeline (ditches along U.S. Highway 395); Madeline Plains 1615 Comment
  JEPS23858  Downingia insignis Peter H. Raven 1958-6-17 13282 Lassen 1.9 mi s Ravendale (along U.S. Highway 295) Comment
  JEPS3751  Downingia insignis Helen-Mar Wheeler 1952-7-11 Lassen s of Madeline Comment
  SJSU3174  Downingia insignis J. W. Tilden 1958-6-27 1290 Lassen Madeline Comment
  JEPS106977  Downingia insignis Lisa Schultheis 1995-6-27 226 -95 Lassen East side of 395, 1.6 miles south of Ravendale Comment
  SEINET8039620  Downingia laeta G. Schoolcraft 1995-6-6 2493 Lassen Laver Spring. 1585 Comment
  SEINET10539558  Draba David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17801 Lassen 6 mi. N of hallelujah jct. On u.s. Hwy 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge & in sandy wash. 1402 Comment
  CAS-BOT-BC41952  Draba albertina John Thomas Howell 1934-6-30 12132 Lassen Warner Mountains. Near Lost Lake. 2438 Comment
  CAS-BOT-BC41370  Draba verna M. S. Taylor 1982-5-7 4428 Lassen Reno Junction on Highway 70 just east of Beckwourth Pass. 1524 Comment
  OBI78908  Draba verna Anthony Baniaga 2011-6-7 313 Lassen Lassen National Forest. Northwest area of Grays Valley, just South of intersection of 33N11 and 32N83Y. Poison Lake quadrangle. 1747 Comment
  JEPS128410  Drymocallis glandulosa Catherine Bauer with Ellen Bauer Benson 2017-8-16 18 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  CHSC27594  Dysphania botrys George Deniso 1978-7-22 85 Lassen E shore of Eagle L., in basalt rock and cattle manure, several ft S of Little Traxel Pt. 1584 Comment
  CHSC71071  Eatonella nivea Vernon H. Oswald; Lowell Ahart 1998-5-22 9122 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., 5 mi NE of Doyle. 1463 Comment
  CHSC112423  Elatine Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18752 Lassen Plants near pond, about 80 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC112989  Elatine Lowell Ahart; John Dittes 2013-7-23 18890 Lassen Around a man made pond, about 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS121273  Elatine Lowell Ahart, John Dittes 2013-7-23 18890 Lassen Man-made pond, about 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS121283  Elatine Lowell Ahart, John Dittes 2013-7-22 18882 Lassen 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
  RSA233772  Elatine R. F. Thorne, C. W. Tilforth, K. Thorne 1969-9-5 39134 a Lassen Said Valley Reservoir Comment
  CAS-BOT-BC113615  Eleocharis acicularis R. K. Gierisch; D. H. Esplin 1969-8-26 3596 Lassen Harvey Valley 1676 Comment
  JEPS87445  Eleocharis bella Vernon H. Oswald and Lowell Ahart 1993-6-28 5599 Lassen n.e. Poison Lake (n. of Hwy. 44 at n.w. edge of Harvey Valley, Rd. 35N04 at Aspen Well); Harvey Valley, Aspen Well 1725 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
  CAS-BOT-BC113361  Eleocharis engelmannii James D. Jokerst 1983-7-23 1873 Lassen Grasshopper Valley Quad, near Madeline Plains. 1614 Comment
  UC1825  Eleocharis macrostachya J. Burtt Davy Jun 17-24 1897 3288 Lassen Honey Lake Valley Comment
  UC1100703  Eleocharis parishii Malcolm A. Nobs and S. Galen Smith 1949-8-20 1490 Lassen 1 mi S of, Long Creek Doyle Comment
  JEPS103218  Eleocharis quinqueflora G. Schoolcraft 1995-5-22 2483 Lassen Morgan Spring N of Skedaddle Mountains 1524 Comment
  CHSC96438  Eleocharis suksdorfiana Gordon Leppig 1998-7-13 968 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  POM313177  Elodea nuttallii H. L. Mason, Verne Grant 1947-7-9 13292 Lassen Irrigation ditch 5 miles east of Bieber. Comment
  UCD32663  Elymus X saundersii Beecher Crampton 1954-7-5 2061 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  CAS-BOT-BC221829  Elymus canadensis Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  CHSC112467  Elymus caput-medusae Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18749 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
  CAS-BOT-BC227490  Elymus elymoides Gary Schoolcraft 1983-6-29 1053 Lassen Ash Valley 1554 Comment
  SEINET12745634  Elymus elymoides F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  SEINET8512804  Elymus elymoides A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-6-24 NV 030 -1085 Lassen Costantia Allotment, W of Peterson's. 1374 Comment
  UCD61624  Elymus elymoides A. A. Beetle 1941-6-28 2804 Lassen 10 miles W of Chester, rte 36. Comment
  CHSC6320  Elymus elymoides subsp. elymoides Nick Santamaria 1968-6-29 16 Lassen On the ELBS grounds. Comment
  CDA31743  Elymus glaucus A. A. Beetle 1941-6-28 2803 Lassen Near Route 36, 10 miles west of Chester 0 Comment
  CHSC29902  Elymus glaucus Robin L. Ondricek 1978-7-22 107 Lassen 1.2 mi e of paved road to the marina on Black Mt. road. 1584 Comment
  UC1037105  Elymus glaucus Leo Whitney 1934-7-15 3003 Lassen ca 15 mi w Eagle Lake; Lassen National Forest, Crater Lake 2133 Comment
  UCD61838  Elymus glaucus Burle Jones 1940-8-15 Lassen Lassen Park, Hat Creek. Comment
  CAS-BOT-BC206732  Elymus glaucus subsp. glaucus John Thomas Howell 1976-7-19 51977 Lassen Gold Run Creek southwest of Susanville - Sierra Nevada 1386 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
  UCD62571  Elymus repens Beecher Crampton 1954-7-5 2059 Lassen Hwy 36, 4.5 miles west of Susanville. Comment
  UC70687  Elymus trachycaulus J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  UCD32662  Elymus trachycaulus Beecher Crampton 1954-7-5 2058 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  JEPS123855  Elymus trachycaulus subsp. trachycaulus Lowell Ahart, John Dittes 2015-7-14 20332 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CDA2066  Elytrigia repens H. S. Milton, P. Milton Jul 1980 Lassen Herman S. & Paul Milton Ranch, Riverside District, Hwy 395, 8 miles east of Susanville. 0 Comment
  CAS-BOT-BC81878  Ephedra viridis M. Bourell 1997-5-31 5882 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  CHSC23330  Ephedra viridis Mark Stopher 1976-1-11 29 Lassen Ca. 52 miles south of Susanville on Hwy. 395 then two miles east on Red Rock Road. 1328 Comment
  UC1537115  Ephedra viridis Gordon H. True Jr. 555 Lassen n slope Hot Spring Mountain 1981 Comment
  SEINET5335198  Ephedra viridis F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  HSC68917  Epilobium brachycarpum Gary Schoolcraft 1980-7-7 302 Lassen N end of Eagle Lake 1585 Comment
  SEINET12539651  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  CHSC27121  Epilobium campestre Robert A. Schlising 1978-6-28 3296 Lassen E of Eagle Lake at Dry Lake. 1645 Comment
  JEPS117579  Epilobium campestre Lowell Ahart, John Dittes 2010-7-31 16996 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  JEPS119650  Epilobium campestre Lowell Ahart, John Dittes 2012-7-9 18285 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS43851  Epilobium ciliatum subsp. ciliatum W. L. Jepson 1939-8-11 19378 Lassen Milford 1280 Comment
  UC1583966  Epilobium ciliatum subsp. ciliatum G. Schoolcraft 1990-8-14 2123 Lassen on Hwy 139 between M.P. 56 and M.P. 57 (s of Adin) 1432 Comment
  CHSC106068  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
  CHSC58845  Epilobium densiflorum Vernon H. Oswald; Lowell Ahart 1992-7-16 5110 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. On the bed of the creek on the bed of the reservoir. 1691 Comment
  UC725477  Epilobium densiflorum A. A. Heller 1938-7-28 15296 Lassen about a mile e Westwood (meadow on edge of swamp) 1524 Comment
  JEPS39254  Epilobium hallianum Brown and Wieslander 1922-7-23 38 Lassen Martin Sprs. Eagle Lake Comment
  HSC95331  Epilobium oregonense Gordon Leppig, J. Cromwell 1997-7-27 605 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  HSC95332  Epilobium oregonense Gordon Leppig 1998-7-12 937 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1609446  Epilobium pallidum Vernon H. Oswald and Lowell Ahart 1993-7-8 5673 Lassen Halls Flat Rd (33N18) 1.4 mi ssw Pittville Rd (Lassen 111, 36N01) (ca 5.4 air mi nw of Poison Lake, bed of vernal pool on e side of rd) 1694 Comment
  CAS-BOT-BC56948  Equisetum arvense John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49463 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC12494  Equisetum arvense Carol Weld 1969-6-26 46 Lassen 7.8 miles S. W. of Eagle Lake Field Station. 1584 Comment
  CAS-BOT-BC57301  Equisetum laevigatum Barbara Shervanick 1974-5-7 1262 Lassen Highway 395, just south of Milford, Cascade Range 1371 Comment
  SEINET10530259  Equisetum laevigatum Jeffrey Huber 1971-6-11 Huber 318 Lassen 3 mi E of Westwood, on CA Hwy 36; in volcanic soils (basalt), in Pinus jeffreyi. 1608 Comment
  SBBG115910  Eragrostis cilianensis J. T. Howell 1973-7-10 49793 Lassen city park, Susanville 1295 Comment
  CAS-BOT-BC213625  Eragrostis mexicana subsp. virescens John Thomas Howell; G. H. True 1973-7-31 50145 Lassen Susanville 1295 Comment
  SEINET8267478  Eremogone congesta L. E. Detling 1936-6-28 1757 Lassen near Susanville. Comment
  CHSC118851  Eremogone congesta var. subcongesta L. P. Janeway; B. Castro 2015-6-5 11763 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley toTuledad Canyon, 7.4 road-km south ofSurprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CAS-BOT-BC159997  Eremothera boothii subsp. alyssoides Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 7 miles south of Secret Valley, C.C.C. Camp, U.S. Hy. 395 Comment
  CAS-BOT-BC160001  Eremothera boothii subsp. alyssoides David D. Keck; J. Clausen 1935-6-24 3741 Lassen 2 mi. S. of Ravendale 1464 Comment
  SEINET4133353  Eremothera boothii subsp. alyssoides G. Schoolcraft 1980-5-30 247 Lassen Along road to Diaz Ranch 1359 Comment
  CHSC5009  Eriastrum signatum L. G. Bennett 1967-7-4 110 Lassen Deans Meadow, near Eagle Lake. 1706 Comment
  UC908543  Eriastrum signatum R. F. Hoover 1940-10-1 4648 Lassen Johnstonville Comment
  CAS-BOT-BC515175  Eriastrum signatum Rimo Bacigalupi; G. T. Robbins 1955-7-21 5417 Lassen Southern edge of Secret Valley, along the Smoke Creek road, 6.8 mi E of US Hwy 395 Comment
  RSA0124149  Eriastrum signatum Christopher Davidson 1975-6-7 2763 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UC133906  Eriastrum sparsiflorum Dr. Gustav Eisen July 1891 Lassen Honey Lake Comment
  NY1012897  Eriastrum sparsiflorum var. sparsiflorum R. R. Halse 2004-6-21 6669 Lassen At Junction of U.S. Highway 395 and State Road A 26 ca. 11 miles southeast of Milford 1274 Comment
  CHSC349  Ericameria bloomeri 1944-7-31 Lassen Westwood. 1549 Comment
  UC29712  Ericameria nauseosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3344 Lassen Honey Lake Valley Comment
  SEINET7950731 Image available Ericameria nauseosa var. hololeuca Unknown 1921-9-11 s.n. Lassen South side of Honey Valley 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-BC298176  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-4 2397 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  JEPS21521  Ericameria nauseosa var. oreophila R. F. Hoover 1940-9-28 4638 Lassen Leavitt Comment
  UC527346  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 Lassen 3/4 mi e Termo 1645 Comment
  CAS-BOT-BC294182  Ericameria nauseosa var. speciosa Margaret Williams 1974-8-4 74 -L-71 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC294183  Ericameria nauseosa var. speciosa Clare B. Hardham 1969-8-28 17426 Lassen West of Janesville Comment
  UC1136974  Ericameria nauseosa var. speciosa L. R. Short 1936-9-14 S- 502 Lassen Burgess Spr. Exp. Range Lassen Forest 1761 Comment
  UC1136975  Ericameria nauseosa var. speciosa L. R. Short 1936-9-30 S- 504 Lassen Burgess Spr. Exp. Range Lassen Forest 1755 Comment
  UCD131606  Erigeron aphanactis Jack Major 1966-6-23 s.n. Lassen just north of Hallelujah Junction (at junction of State Highway 70 and U.S. Highway 395). 1432 Comment
  CHSC64863  Erigeron aphanactis var. aphanactis Vernon H. Oswald; Lowell Ahart 1995-6-19 6890 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 3.6 mi e of Hwy. 395. On the s side of the road. 1353 Comment
  CHSC93247  Erigeron aphanactis var. aphanactis John Dittes; Scott Chamberlain 2004-6-28 1008 Lassen Modoc Plateau; Long Valley; ca. 1.8 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 1.0 air-mile east of Plumas County line. 1460 Comment
  CHSC29923  Erigeron bloomeri Robin Ondricek 1978-6-6 35 Lassen 1 mi S of Colley Point Overlook on Hwy 139. 1584 Comment
  CAS-BOT-BC294488  Erigeron bloomeri var. bloomeri John Thomas Howell 1934-7-8 12513 Lassen Harvey Valley Comment
  CHSC4947  Erigeron bloomeri var. bloomeri R. Carter 1967-6-23 545 Lassen Growing 10 yds off s side rd. Comment
  CHSC64753  Erigeron bloomeri var. bloomeri Vernon H. Oswald 1995-5-31 6806 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.9 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  CHSC92714  Erigeron bloomeri var. bloomeri L. P. Janeway; B. Castro 2005-7-10 8486 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
  HSC81651  Erigeron bloomeri var. bloomeri Thomas W. Nelson, Jane P. Nelson 1980-7-6 6034 Lassen Ash Valley, along branch road off Adin-Madeline Rd., just S of bridge over Ash Creek, 16 mi. SE of Adin, 2.5 mi. SE of junction with main road 1555 Comment
  JEPS114758  Erigeron bloomeri var. bloomeri Lowell Ahart, John Dittes 2008-6-19 14894 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  UC1118090  Erigeron bloomeri var. bloomeri A. Simontacchi 1940-6-12 848 Lassen 3.7 mi sse Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC773917  Erigeron bloomeri var. bloomeri L. R. Short and J. Warren 1936-6-23 S- 451 Lassen Burgess Springs Experiment Range Lassen National Forest, Burgess Springs Experiment Range 1741 Comment
  HSC63773  Erigeron bloomeri var. bloomeri Teresa Prendusi 1980-5-22 1128 Lassen Shafer Mtn, near top 1982 Comment
  SEINET11826499  Erigeron bloomeri var. bloomeri Unknown 1967-1 545 Lassen 10 yds off S side road Comment
  CHSC5207  Erigeron breweri 1944-6-30 Lassen Eagle Lake. Grasshopper Valley. 1584 Comment
  CAS-BOT-BC295980  Erigeron divergens Clare B. Hardham 1961-6-17 7504 Lassen Baxter Creek south of Susanville 1524 Comment
  CHSC105252  Erigeron divergens Lowell Ahart; John Dittes 2010-7-31 17004 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  CHSC66373  Erigeron divergens Vernon H. Oswald; Lowell Ahart 1996-6-17 7808 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the edge of the Susan River E of Devils Corral Trailhead and W of the 6.0 mile post. 1402 Comment
  CHSC91207  Erigeron divergens Lowell Ahart; John Dittes 2005-6-2 11924 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  POM33001  Erigeron divergens Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  RSA339143  Erigeron divergens Margaret J. Williams 1984-6-16 84- 31 -1 Lassen Doyle Grade, County Hwy. 331, 2.6 miles W of Doyle. Comment
  RSA78916  Erigeron divergens E. K. Balls, Percy C. Everett 1952-10-10 18144 Lassen 8 mi. SE of Ravendale, Hwy 395, between Susanville and Alturas. 1280 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
  CAS-BOT-BC300373  Erigeron eatonii var. plantagineus Alice Eastwood; John Thomas Howell 1940-6-15 8320 Lassen Said Valley Comment
  SBBG8127  Erigeron eatonii var. plantagineus H. and M. Dearing 1938-6-30 2233 Lassen N of Susanville [Hwy 44] Comment
  CAS-BOT-BC300425  Erigeron elegantulus Roxana S. Ferris; Rena Duthie 1919-6-12 20 Lassen Madeline Comment
  RSA0049607  Erigeron elegantulus Dean Wm. Taylor 2012-6-7 21227 Lassen Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139 1635 Comment
  CHSC93249  Erigeron filifolius var. filifolius John Dittes; Scott Chamberlain 2004-6-28 1016 Lassen Modoc Plateau; Long Valley; ca. 4.6 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 3.2 air-miles west of Hwy 395, ca. 0.3 air-mile east of Plumas County line; near meadow edge. 1511 Comment
  CAS-BOT-BC295182  Erigeron inornatus John Thomas Howell 1974-7-10 50561 Lassen Elysian Valley 1325 Comment
  SBBG8113  Erigeron inornatus H. and M. Dearing 1938-7-1 2236 Lassen Susanville Comment
  CHSC65089  Erigeron inornatus var. calidipetris Vernon H. Oswald; Lowell Ahart 1995-7-24 7146 Lassen Cascade Range. Forest Road 31N25 0.5 mi E of Forest Route 10, near the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. Edge of the road. 1905 Comment
  OBI76966  Erigeron inornatus var. calidipetris Anthony Baniaga 2011-8-3 485 Lassen Lassen Natl Forest.N of 30N61, W of A21. Swain Mtn quad. T30N R8E sec 26 NW of SW 1728 Comment
  SEINET5708489 Image available Erigeron inornatus var. inornatus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7715 Lassen Grasshopper Valley. Collected along CA 139.; Grasshopper Valley 1586 Comment
  SFV10992  Erigeron lassenianus var. deficiens J. Turner, F. M. Ball 1962-7-13 1193 Lassen Laufman Public Camp, 3 miles off Highway 395 from Milford near Honey Lake. 1494 Comment
  CHSC13846  Erigeron peregrinus var. callianthemus A. W. Harilik 1967-7-11 58 Lassen Collected on road 5.19 ca. 5 mi from Eagle Lake Biology Station. 1524 Comment
  CAS-BOT-BC295958  Erigeron philadelphicus G. Schoolcraft 1993-6-1 2273 Lassen Secret Creek area s. of Tule Patch Spring 1463 Comment
  SJSU6631  Erigeron philadelphicus var. philadelphicus H. L. Buckalew 1961-7-9 Lassen spring by Blue Lake, Warner Mountains 1920 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
  UC1118181  Erigeron pumilus var. intermedius A. Simontacchi 1940-6-30 906 Lassen 2.2 mi ene of Ebey Lake; Halls Flat Quad. 1699 Comment
  UC506996  Erigeron pumilus var. intermedius George A. Fischer and Irwin H. Johnson 1933-7-12 F 209 Lassen Grass Valley 1700 Comment
  NY243326  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-1 4649 Lassen Johnstonville. Comment
  CHSC25303  Eriogonum caespitosum Pauleen Broyles 1977-5-30 150 Lassen Lava flow ca 1.6 km se of South Fork Reservoir and 1.6 km n of Skedaddle Creek Road, ca 8 km ne of Herlong. 1660 Comment
  CHSC25312  Eriogonum caespitosum Pauleen Broyles 1977-6-1 159 Lassen Lava flow ca 1.6 km se of South Fork Reservoir and 1.6 km n of Skedaddle Ranch Road, ca 10 km ne of Herlong. 1660 Comment
  NY242506  Eriogonum collinum A. J. Cronquist 1959-6-17 8478 Lassen 1 mile south of Ravendale, 40 miles northeast of Susanville. 1615.4 Comment
  RSA236684  Eriogonum collinum A. J. Cronquist, A. H. Holmgren 1959-6-17 8478 Lassen 1 mile south of Ravendale, 40 miles NE of Susanville 1616 Comment
  CAS-BOT-BC246502  Eriogonum douglasii var. meridionale Doris Kildale Gillespie 1930-5-13 9361 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC246503  Eriogonum douglasii var. meridionale John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50662 Lassen Summit ridge of Diamond Mt. 2346 Comment
  UCSC005349  Eriogonum elatum Randall Morgan 1998-7-20 3319 Lassen Hwy 144 west of Susanville Comment
  UCR90298  Eriogonum kearneyi G. R. Ballmer 1993-7-1 s.n. Lassen N end of Fort Sage Mtns 1542 Comment
  CAS-BOT-BC263047  Eriogonum maculatum R. F. Hoover 1940-10-5 4670 Lassen Wendel Comment
  NY281661  Eriogonum maculatum R. F. Hoover 1940-10-5 4670 Lassen Wendel. Comment
  RSA780322  Eriogonum marifolium Elizabeth A. Kempton 2007-8-15 509 Lassen Lassen National Forest, Lassen Peak ca. 0.25 mile along trail from trailhead/parking lot. 2678 Comment
  RSA78919  Eriogonum microtheca var. ambiguum E. K. Balls, Percy C. Everett 1952-10-10 18143 Lassen 8 mi. SE of Ravendale, Hwy 395, Susanville to Alturas. 1280 Comment
  CDA22621  Eriogonum microthecum var. ambiguum L. Ahart 2003-8-17 10518 Lassen About 100 yards west of the cattle guard, on the southeast side of Smoke Creek Ranch Road, about 8 - 9 miles (air) northeast of Highway 395, about 30 miles (air) northeast of Susanville. Comment
  NY281555  Eriogonum microthecum var. laxiflorum E. K. Balls 1952-10-10 18143 Lassen In Northern Juniper Woodland, 8 mi. s.e. of Ravendale, Hwy 395, between Susanville and Alturas. 1280.2 Comment
  UC585235  Eriogonum microthecum var. laxiflorum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1753 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  UC85949  Eriogonum microthecum var. laxiflorum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  SEINET530760  Eriogonum nudum var. deductum Paul Opler 2008-8-6 Lassen West of Milford, nr. Laufman Campground. Comment
  CAS-BOT-BC266365  Eriogonum nudum var. deductum H. D. Ripley; R. C. Barneby 1943-6-13 5700 Lassen South of Milford 1569 Comment
  JEPS117570  Eriogonum nudum var. nudum Lowell Ahart, John Dittes 2010-7-31 16983 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  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
  UCR17292  Eriogonum nudum var. pubiflorum Frank C. Vasek 1975-7-11 750711- 40 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  NY282047  Eriogonum ovalifolium var. nevadense G. Schoolcraft 1982-6-28 738 Lassen Ft. Sage Mtns. 762.0 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
  HSC63563  Eriogonum prociduum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6004 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  RSA122742  Eriogonum spergulinum var. reddingianum L. R. Short, Jan Gish 1936-6-2 S- 375 Lassen Jeffrey ponderosa pine. 1799 Comment
  UC303059  Eriogonum spergulinum var. reddingianum Pearl Safford Lassen Susanville [uncertain locality] Comment
  POM105341  Eriogonum sphaerocephalum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  CHSC110769  Eriogonum sphaerocephalum var. halimioides Dean Wm. Taylor 2012-5-16 21200 b Lassen Modoc Plateau. Ca. 1 air mile S of Stanford Camp (ca. 3 air mi SSE of Big Jack Lake). 1920 Comment
  CHSC71393  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald 1998-7-6 9246 Lassen Shugru Reservoir in Bass Hill WA on Hwy. 395 between Susanville and Janesville, 2.7 mi southeast of Hwy. 36. Roadside flat. 1243 Comment
  CHSC86947  Eriogonum sphaerocephalum var. halimioides L. P. Janeway 2001-6-20 7190 Lassen High Cascade Range. South side of the junction of the '22' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain. 1560 Comment
  JEPS94611  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald and Lowell Ahart 1997-5-27 8491 Lassen e side of Hwy 139 at small farm pond 38.2 mi n Susanville (7.4 mi n of Eagle Lake Rd.) 1627 Comment
  RSA31953  Eriogonum sphaerocephalum var. halimioides A. A. Heller 1938-6-23 15214 Lassen south of Secret Valley on U.S. Highway #395. 1372 Comment
  CAS-BOT-BC262736  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen In Balls Canyon on U. S. Highway #395 Comment
  CHSC64885  Eriogonum sphaerocephalum var. sphaerocephalum Vernon H. Oswald; Lowell Ahart 1995-6-19 6875 Lassen Between Litchfield and Revendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395. 1383 Comment
  NY283175  Eriogonum strictum subsp. proliferum W. W. Eggleston 1911-7-7 7173 Lassen Secret Valley 1330 Comment
  CHSC13455  Eriogonum strictum var. anserinum J. Pitts 1972-6-22 248 Lassen 70 yds. n of Eagle Lake Biology Station. Comment
  JEPS107833  Eriogonum strictum var. anserinum Lowell Ahart, John Dittes 2005-6-2 11984 Lassen North side of the poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.8 miles (air) northwest of Hallelujah Junction 1430 Comment
  NY762354  Eriogonum strictum var. anserinum H. D. D. Ripley 1944-5-30 5965 Lassen Secret Valley 1554.5 Comment
  NY283169  Eriogonum strictum var. anserinum A. J. Cronquist 1959-6-17 8473 Lassen 50 miles southeast of Susanville. 1371.6 Comment
  UC1249283  Eriogonum strictum var. anserinum Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8473 Lassen 50 mi se Susanville 1371 Comment
  UC412821  Eriogonum strictum var. proliferum T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  UCD149821  Eriogonum strictum var. proliferum William Anderson 1963-6-2 s.n. Lassen Lassen County. Comment
  CAS-BOT-BC267889  Eriogonum umbellatum Hans Leschke 1964-9-3 1892 Lassen Cinder Cone, Lassen Volcanic National Park Comment
  CAS-BOT-BC267893  Eriogonum umbellatum H. D. Ripley; R. C. Barneby 1943-6-13 5413 Lassen South of Johnstonville 1325 Comment
  HSC63828  Eriogonum umbellatum Teresa Prendusi 1980-7-14 Lassen Ash Valley, about 15 mi. W of Madeline along Ash Valley Rd. 1524 Comment
  UCR248974  Eriogonum umbellatum Elizabeth A. Kempton, Tim Tibault 2006-7-29 418 Lassen town of Chester, vacant lot at intersection of Willow Way and Main Street 1388 Comment
  CAS-BOT-BC267892  Eriogonum umbellatum Margaret M. Hanna 1956-6-3 s.n. Lassen Near Hiway 299, 62 mi. E. of Redding Comment
  CHSC6227  Eriogonum umbellatum var. modocense A. Santos 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  CHSC86946  Eriogonum umbellatum var. modocense L. P. Janeway 2001-6-20 7189 Lassen High Cascade Range. South side of the junction of the '22' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain. 1560 Comment
  UC1537274  Eriogonum umbellatum var. modocense Gordon H. True Jr. 1936-6-25 536 Lassen e Harvey Ranger Station; Harvey Valley 1706 Comment
  NY399279  Eriogonum umbellatum var. nevadense L. Bass 1983-6-10 383 Lassen About 3 miles east of Susanville, Center Road near Leavitt lane Comment
  NY399395  Eriogonum umbellatum var. nevadense G. Schoolcraft 1982-7-7 771 Lassen Fort Sage Mountains 1950.7 Comment
  RSA65960  Eriogonum umbellatum var. nevadense F. W. Peirson 1926-6-24 6848 Lassen On Madeline Plain. Comment
  CAS-BOT-BC265098  Eriogonum umbellatum var. nevadense Louella Bass 1983-6-12 1 -83 Lassen On Sears Road near Janesville, Sierra Nevada Comment
  UCR208066  Eriogonum umbellatum var. polyanthum L. P. Janeway 2004-6-26 8157 Lassen High Cascade Range, about 1.3 km WSW of Patterson Flat, at junction of roads 35N08 and 35N20, in Blacks Mountain Experimental Forest 1750 Comment
  CAS-BOT-BC262200  Eriogonum ursinum Clarence R. Quick 1964-8-5 64 -98 Lassen Cal Mt. east of Poison Lake 1767 Comment
  JEPS56205  Eriogonum ursinum Hilda W. Grinnell 1934-6-2 Lassen Fredonyer Pass 1753 Comment
  CAS-BOT-BC262362  Eriogonum vimineum John Thomas Howell 1934-6-10 11850 Lassen 4 miles south of Omira Comment
  CAS-BOT-BC262363  Eriogonum vimineum John Thomas Howell 1934-6-10 11893 Lassen Horse Lake Comment
  CHSC105234  Eriogonum vimineum Lowell Ahart; John Dittes 2010-7-31 17018 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  HSC63561  Eriogonum vimineum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6006 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  SEINET10299456  Eriogonum vimineum Gary Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade Road west of Doyle Creek 1585 Comment
  SEINET3160096  Eriogonum vimineum subsp. vimineum L. S. Rose 1940-6-16 40596 Lassen Janesville 1280 Comment
  HSC28861  Eriophyllum lanatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19174 Lassen Harvey Valley near Cone Springs Comment
  SEINET10672052  Eriophyllum lanatum Paul Gallian, David B. Dunn 1971-6-2 Gallian 517 Lassen 6 mi. N of Hallelujah Jct., on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC308137  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-8 12481 Lassen Spalding's, Eagle Lake Comment
  CHSC92740  Eriophyllum lanatum var. achilleoides L. P. Janeway 2005-7-3 8453 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  SEINET4208677  Eriophyllum lanatum var. achilleoides Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 9490 Lassen Rye Patch Canyon Road, 3.4 km (2.1 mi) east of US Highway 395, 14.5 km (9 mi) airline distance southeast of Ravendale.; 0 1700 Comment
  UC773893  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
  UCD103215  Erodium cicutarium P. B. Schultz 1967-7-12 75 Lassen 100 feet east of highway, 1/4 mile west of Willow Creek campground, 14.9 miles southeast of Adin on State Highway 139. 1524 Comment
  UC1088542  Eryngium alismifolium Ornduff 1958-7-22 5014 Lassen 6.6 mi. n. Ravendale (along Hwy. 395) Comment
  UC1587182  Eryngium alismifolium Beth Corbin 1990-7-18 588 Lassen ca. 2 mi. e. Wilson Spring (ca. 2 mi. s.w. of Little Valley, just n. of Forest Rd. 22) 1550 Comment
  UC1745690  Eryngium alismifolium Annetta M. Carter 1945-9-30 1716 Lassen W side of Eagle Lake. About 3 mi. S of Spaldings where road crosses bridge over dry creek. Comment
  JEPS66448  Eryngium alismifolium L. R. Heckard and P. Rubtzoff 1971-8-4 2709 Lassen ca. 10 mi. n. Terms (along U.S. Hwy. 395) Comment
  UC21010  Eryngium articulatum J. Burtt Davy Jun 17 1897-Jun 24 1897 3374 Lassen Honey Lake Valley Comment
  CDA38324  Eryngium articulatum Wheeler 1953-9-22 s.n. Lassen [no additional info] 0 Comment
  CAS-BOT-BC40726  Erysimum capitatum John Thomas Howell 1934-6-14 12154 Lassen Warner Mountains. Near Lost Lake. 2438 Comment
  UC1137587  Erysimum capitatum var. capitatum A. Simontacchi 1940-6-15 868 Lassen 0.6 mi wsw Blacks Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC54956  Erysimum perenne Louella Bass 1973-4-30 EV 34 Lassen Elysian Valley. 1325 Comment
  JEPS118155  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
  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
  CHSC60405  Erythranthe breweri Mary Ann Showers 1992-6-12 2527 Lassen Lassen Volcanic National Park. Butte Lake. 1859 Comment
  CHSC66266  Erythranthe breweri Vernon Oswald; Lowell Ahart 1996-6-24 7850 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  CHSC66267  Erythranthe breweri Vernon H. Oswald; Lowell Ahart 1996-6-24 7866 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  CHSC106222  Erythranthe guttata Arthur C. Barrett 1915-6-3 14 Lassen Laufman Ranger Station. 1463 Comment
  CHSC5906  Erythranthe guttata M. West 1946-6-20 Lassen Grasshopper Valley. Eagle Lake. 1615 Comment
  CHSC30559  Erythranthe primuloides Sori H. Shad 1970-6-25 11 Lassen At Deans Meadow. 1828 Comment
  CHSC5909  Erythranthe primuloides J. B. Kimsey 1946-6-20 Lassen Grasshopper Valley. 1615 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
  PASA565  Erythronium purpurascens Margaret Stason 1932-6-21 440 Lassen Devil's Kitchen, Lassen National Park Comment
  CAS-BOT-BC403146  Eschscholzia californica Alice Eastwood; John Thomas Howell 1940-6-16 8344 Lassen Janesville Comment
  CHSC7770  Eschscholzia californica Beverley J. Wise 1969-5-17 72 Lassen City limits of Susanville on Hwy 139. 1310 Comment
  CHSC117283  Eschscholzia californica subsp. californica Lowell Ahart; John Dittes 2016-7-15 21228 Lassen About 100 yards west of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1278 Comment
  UCR67467  Eucephalus breweri George K. Helmkamp 1990-10-4 M- 6 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  UCD114965  Euclidium syriacum June McCaskill 1966-6-5 712 Lassen Frosty Acres ranch, at end of Albaugh Road, 0.6 mile west of its junction with Bassett Road (ca. 2 miles south of U.S. Highway 299 and 4 miles southwest of Adin), northern part of county. 1280 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
  UC1533119  Euphorbia spathulata G. Schoolcraft 1986-6-18 1629 Lassen 3.5 mi e Hwy. 195 (on road to Hall Sp.) 1463 Comment
  CAS-BOT-BC312105  Eurybia integrifolia Alice Eastwood 1912-8-22 1914 Lassen Battle Creek Meadows, Lassen Butte Region Comment
  JEPS31932  Eurybia radulina Duncan Dunning 1921-8-15 Lassen near, sw of Westwood Junction Facht; Robbers Creek Comment
  UC1192257  Euthamia occidentalis Malcolm A. Nobs, S. Galen Smith 1949-8-20 1488 Lassen 1 mi s of Doyle; Long Creek Comment
  CAS-BOT-BC310646  Euthamia occidentalis G. Schoolcraft 1997-8-20 2698 Lassen On Susan River behind BLM office in Susanville 1264 Comment
  CAS-BOT-BC278431  Festuca idahoensis John Thomas Howell 1934-7-6 12448 Lassen Harvey Valley Comment
  CAS-BOT-BC278436  Festuca idahoensis John Thomas Howell 1934-7-7 12471 Lassen Pine Creek Flat Comment
  JEPS127718  Festuca idahoensis Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -173 Lassen South on 395. West on 171. Continue above 6000ft. Comment
  RSA585079  Festuca idahoensis J. T. Howell 1934-7-7 12471 Lassen Pine Creek Flat. Comment
  UCD65965  Festuca idahoensis Beecher Crampton 1960-6-18 5715 Lassen N. E. Lassen County: Southern Warner Mountains, 1.25 miles north of Blue Lake, in vicinity of Blue Lake Ranch area. 1981 Comment
  UCD65976  Festuca idahoensis L. Whitney 1933-7-1 Lassen Logan Mt. Comment
  UCD65979  Festuca idahoensis L. Whitney 1933-8-10 Lassen Halls Flat. 1737 Comment
  UC53432  Festuca pratensis M. S. Baker and Frank Nutting 1894-6-30 Lassen Big Valley Comment
Read comments
Jun 24 2009
  CAS-BOT-BC278932  Festuca rubra John Thomas Howell 1934-7-6 12458 Lassen Harvey Valley 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
  UCR18732  Frasera albicaulis Frank C. Vasek 1975-7-11 750711- 05 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  JEPS120292  Frasera albicaulis var. modocensis Tim Kask 2013-5-29 211 Lassen On USFS Rd. 18 north of Highway 44 1/4 mi. Comment
  RSA392153  Frasera albicaulis var. nitida Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  RSA122218  Fritillaria atropurpurea K. e. Bradshaw 1939-5-27 232 Lassen Lassen Forest. S. end Black Mt. Experimental Forest, Plot 39-1. 1753 Comment
  RSA304281  Fritillaria pudica James R. Shevock 1971-4-9 946 Lassen East of Dana, Highway 299 915 Comment
  RSA367755  Fritillaria recurva J. P. Smith, J. O. Sawyer 1972-5-6 5235 -a Lassen Lassen National Forest; Boundary Campground on State Route 89 south of Burney 1067 Comment
  RSA180586  Gaillardia aristata T. C. Fuller 1965-8-25 14036 Lassen East side of Hwy. 395 to Doyle, 2.4 miles north of Hallelujah Junction Comment
  POM69204  Galium aparine var. echinospermum Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  CHSC66866  Galium trifidum var. pusillum Vernon H. Oswald; Lowell Ahart 1996-9-10 8275 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  UC506925  Gayophytum diffusum subsp. parviflorum George A. Fischer and Irwin H. Johnson 1933-7-14 F 247 Lassen Lassen National Forest 1767 Comment
  UC20253  Gayophytum heterozygum M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC20269  Gayophytum heterozygum M. S. Baker and F. Nutting 1894-6-9 Lassen Pine Creek Comment
  UC1122615  Gayophytum humile A. Simontacchi 1940-6-6 821 A Lassen 10.1 mi se Nigger Cabin; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET10903379  Gayophytum nuttallii David B. Dunn, Douglas G. LeDoux 1973-5-25 Dunn 871 Lassen Collected 3 mi n of milford. On hwy 395 at honey lake campgrounds. Comment
  UC1122614  Gayophytum racemosum A. Simontacchi 1940-5-28 775 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC6191  Gayophytum ramosissimum R. Gein 1946-6-12 Lassen Webb's Camp, Eagle Lake. 1554 Comment
  UC1714624  Gayophytum ramosissimum Franklin P. Nutting 1894-7-5 Lassen Dixey Valley Comment
  HSC8435  Gentiana newberryi Fred J. Kindel 1955-8-1 Lassen Mt. Meadows Reservoir Comment
  CHSC76758  Gentiana newberryi var. newberryi L. P. Janeway 1999-9-5 6576 Lassen High Cascade Range. Upper Pine Creek near Stephens Camp; northwest corner of Upper Stephens Meadow. 1900 Comment
  UC1037229  Geranium viscosissimum Leo Whitney 2007 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CHSC5011  Geranium viscosissimum var. nervosum L. G. Bennett 1967-7-4 105 Lassen Deans Meadow, near Eagle Lake. 1706 Comment
  RSA454250  Geum macrophyllum Roch Well 1929-7-1 s.n. Lassen [Unspecified] Comment
  SEINET6702766  Geum macrophyllum var. perincisum G. Schoolcraft 1994-8-2 2393 Lassen About 2 miles northwest of Boot Lake 2438 Comment
  UC1136907  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
  SEINET14625061  Gilia brecciarum subsp. brecciarum M. J. Williams, A. Tiehm 1978-5-14 78- 48 -1 Lassen Hwy 395, 2.8 miles S of Red Rock road turn-off. 1372 Comment
  CHSC71129  Gilia inconspicua Vernon H. Oswald; Lowell Ahart 1998-5-22 9107 Lassen Road to ORV parking area in Fort Sage Mtns. 0.5 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. On roadside banks. 1371 Comment
  SEINET11268345  Gilia inconspicua Vernon H. Oswald, Lowell Ahart 1998-5-22 9107 Lassen Road to ORV parking area in Fort Sage Mtns. 0.5 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle.; 0 1372 Comment
  SEINET14644567  Gilia inconspicua P. B. Kennedy 1901-6-10 s.n. Lassen Constantia, railroad station. Comment
  RSA104236  Gilia malior Verne Grant, Alva Grant 1956-5-17 21753 Lassen Just south of Secret Valley, north of Litchfield, along Hwy. 395. 1311 Comment
  CHSC48652  Gilia modocensis Vernon Oswald 1986-5-28 2078 Lassen Rd. 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  UC1562812  Gilia salticola Barbara Ertter with Gary Schoolcraft 1987-6-16 7189 Lassen on s side Hot Springs VABM (ne side Honey Lake, Skeedaddle Mountains); Skeedaddle Mountains, s side Hot Springs VABM 2286 Comment
  UCD149886  Gilia sinuata William Anderson 1963-5-12 s.n. Lassen Honey Lake Valley. Comment
  JEPS123845  Glyceria borealis Lowell Ahart, John Dittes 2015-7-14 20326 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CHSC117293  Gnaphalium palustre Lowell Ahart; John Dittes 2016-7-13 21108 Lassen Near where the drainage inters the pond, about 150 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  HSC82197  Gnaphalium palustre Thomas W. Nelson, Jane P. Nelson 1980-7-6 6052 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  POM38258  Gnaphalium palustre Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UC1483835  Gnaphalium palustre G. Schoolcraft 1980-7-22 Lassen nw of BLM fire station (along Hwy 395) 1630 Comment
  CHSC106078  Gratiola ebracteata Lowell Ahart; John Dittes 2010-7-31 17012 Lassen Bottom of small wash, about 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC65359  Gratiola heterosepala Vernon H. Oswald; Lowell Ahart 1995-8-14 7200 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at a BLM reservoir 11.3 mi W of Hwy. 395, N of Susanville. 1737 Comment
  CHSC66867  Gratiola neglecta Vernon H. Oswald; Lowell Ahart 1996-9-10 8280 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  CHSC36443  Grayia spinosa Theresa Costa 1982-6-2 24 Lassen Along Ravendale Rd ca. 10 yd e of Horse Lake. Comment
  CHSC7711  Grayia spinosa Beverley J. Wise 1969-5-18 7 Lassen 13.4 mi. east of Susanville on Las. Co. Rd 216 off Las. Co. Rd. 215. 1524 Comment
  UC1537382  Grayia spinosa Gordon H. True Jr. 1936-6-26 551 Lassen flats s.e. Standish; Honey Lake Valley 1219 Comment
  JEPS124633 Image available Grindelia nana Laurie Hooker 1965-7-13 117 Lassen 1.4 miles past junction of A-2 and 299. Comment
  UC1533130  Gymnosteris parvula G. Schoolcraft 1986-5-14 1567 Lassen near road at stateline in Tuledad Canyon Tuledad Canyon 1524 Comment
Read comments
Nov 4 2011
  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
  UC1137586  Hackelia californica A. Simontacchi 1940-6-15 869 Lassen 0.8 mi sw of Blacks Mountain; Lassen National Forest 2103 Comment
  SBBG63470  Hackelia velutina E. Rockwell -Jun-1925 53 Lassen Eagle Lake 1554 Comment
  CHSC7712  Halogeton glomeratus Jesse Langdon 1969-5-23 8 Lassen Stacey - 35.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  OBI4720  Halogeton glomeratus T. C. Fuller 1962-8-28 9475 Lassen Herlong Siding, Hoeny Lake Valley Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  CHSC12456  Hastingsia alba Robert W. Severin 1969-6-26 34 Lassen 7.2 mi along road from E. L. B. S. to Galatin Beach; 3 mi. s of E. L. B. S. 1645 Comment
  UC88867  Helianthella californica subsp. nevadensis T. S. Brandegee 1882-7-1 Lassen Susanville 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
  CAS-BOT-BC305410  Helianthus annuus Verne Grant; Irving Schneider 1947-7-31 8215 Lassen Northeast quarter of George Williams section 19, Madeline Plain Comment
  UC727121  Helianthus cusickii A. A. Heller 1938-6-23 15209 Lassen along Hwy 395 on ridge n Mapes Comment
  CAS-BOT-BC305660  Helianthus cusickii Philip A. Munz 1947-5-19 11868 Lassen 27.7 miles south of Ravendale 1310 Comment
  RSA0012972  Helianthus nuttallii subsp. nuttallii H. L. Mason 1947-8-11 13492 Lassen Hwy 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  CHSC13635  Heliotropium curassavicum M. S. Taylor 1974-6-25 269 Lassen On w shore of Pelican Pt, on e shore of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  HSC68922  Heliotropium curassavicum var. oculatum Gary Schoolcraft 1980-7-10 303 Lassen E shore of Eagle Lake 1555 Comment
  CAS-BOT-BC314967  Hemizonella minima John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49201 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  POM360351  Hemizonia lobbii J. T. Howell 1934-7-3 12380 Lassen Big Valley, near Bieber Comment
  UC1037238  Hesperochiron californicus Leo Whitney 1935-6-20 3253 Lassen Lassen Nat'l Forest, Fruit Grower's Supply Company, Camp 10 Comment
  SEINET5498645  Hesperochiron californicus D. E. Brix 1962-5-2 s.n. Lassen Spring 2 miles from Junction of Red Rock Rd. and Hwy 395 1433 Comment
  CHSC4793  Hesperolinon micranthum R. Carter 1967-6-29 570 Lassen On rd to Murrer's Meadow. Eagle Lake. Comment
  JEPS27188  Hesperolinon micranthum Lauramay T. Dempster 1961-6-17 1670 Lassen about 4 mi sw junction with Richmond Road (s of Susanville); Gold Run Creek Comment
  JEPS27189  Hesperolinon micranthum Lauramay T. Dempster 1961-6-17 1682 Lassen Hwy 395 just w Tule Mountain 1645 Comment
  CAS-BOT-BC280679  Hesperostipa comata Margaret Williams; Steven Williams 1974-7-26 74 -L-43 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  UC593455  Hesperostipa comata E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1743 Lassen e-facing slope of gully on mountain above Red Rock 1420 Comment
  UC1562822  Heuchera rubescens Barbara Ertter with Gary Schoolcraft 1987-6-16 7201 Lassen ne side Honey Lake (between Hot Springs Peak and VABM); Skeedaddle Mountains 2255 Comment
  CAS-BOT-BC318715  Hieracium horridum Wm. Bridge Cooke 1938-8-18 11492 Lassen Horse Camp slopes, Mount Shasta 2514 Comment
  CDA7975  Hieracium scouleri T. C. Fuller 1963-7-15 12904 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  RSA32855  Hieracium scouleri A. A. Heller 1938-7-28 15301 Lassen About 2 miles east of Westwood. 1524 Comment
  CHSC7206  Hippuris vulgaris Bruce K. Briggs 1969-9-10 232 Lassen Pond at Deans Meadow on N. end of meadow. Comment
  OBI77055  Hordeum brachyantherum Anthony Baniaga 2011-8-4 487 Lassen Lassen NF. About 1/2 mi WNW of Griffith Hill along 30n21. Swain Mtn quad. T30N R8E sec 8 NE of NW 1907 Comment
  SEINET7297784 Image available Hordeum brachyantherum A. A. Beetle 1941-1 2818 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak, open meadow. Comment
  UC53617  Hordeum brachyantherum subsp. brachyantherum M. S. Baker and Frank Nutting 1894-7-4 Lassen Dixey Valley Comment
  CHSC5255  Hordeum jubatum 1944-7-11 Lassen Eagle Lake. 1615 Comment
  UCD85769  Hordeum jubatum R. Tofsrud 1947-7-1 226 Lassen Between Johnstonville and Standish. Comment
  UCD85684  Hordeum jubatum subsp. intermedium A. A. Beetle 1941-6-28 2808 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  CAS-BOT-BC289573  Hordeum marinum subsp. gussoneanum John Thomas Howell 1974-7-10 50533 A Lassen Elysian Valley, Sierra Nevada 1325 Comment
  CHSC99287  Hordeum murinum subsp. leporinum Lowell Ahart; John Dittes 2008-6-20 14915 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
  JEPS114764  Hordeum murinum subsp. leporinum Lowell Ahart, John Dittes 2008-6-20 14915 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CAS-BOT-BC157366  Horkelia fusca John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49441 Lassen Elysian Valley, west of Janesville 1325 Comment
  UC12398  Horkelia fusca subsp. parviflora M. S. Baker and Frank Nutting 1894-7-28 Lassen mtns to s Eagle Lake Comment
  CAS-BOT-BC143984  Horkelia fusca var. tenella George W. Gillett 1957-7-29 942 Lassen Along trail between Butte Lake and Snag Lake, 1/4-mile above Butte Lake 1859 Comment
  CAS-BOT-BC213001  Hosackia crassifolia H. D. Ripley; R. C. Barneby 1943-6-14 5438 Lassen Volcanic hillskide, in open pine woods, Susanville 1402 Comment
  JEPS1628  Hydrophyllum capitatum var. alpinum Leland S. Smith Jun 1925 Lassen near Hayden Hill; Modoc National Forest 1219 Comment
  JEPS87416  Hydrophyllum capitatum var. alpinum Vernon H. Oswald and Lowell Ahart 1993-5-12 5378 Lassen 3.5 mi nw of A21 to Westwood (on n side of road and on e side of Canal crossing Hwy 44) 1729 Comment
  POM66398  Hymenoxys lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  UC19030  Hypericum anagalloides M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CHSC5266  Hypericum formosum var. scouleri J. Wolf 1946-6-20 Lassen Eagle Lake, Grasshopper Valley. 1624 Comment
  SEINET11991644  Hypericum formosum var. scouleri Unknown 1978-1 16 Lassen Papoose Creek, S of Gallatin Beach on Eagle L 1585 Comment
  RSA746512  Hypericum perforatum K. M. Meyer, A. Townesmith 2007-7-19 140 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  SEINET10720226  Hypericum perforatum Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 140 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  CHSC81032  Iliamna bakeri Vernon H. Oswald 2001-7-14 10050 Lassen Hwy 139 at the 11 mile post between Susanville and Eagle Lake. 1706 Comment
  NY716915  Iliamna bakeri R. R. Halse 2004-7-8 6615 Lassen Along State Highway 139, ca. 6 miles north of Eagle Lake 1710 Comment
  HSC63937  Ipomopsis aggregata Teresa Prendusi 1980-7-21 Lassen Fredonyer Peak. alongside rd. to lookout 2317 Comment
  CHSC59781  Ipomopsis congesta Mary Meyer 1980-7-15 Lassen Found in ash barrens. 1546 Comment
  SD7212  Iris missouriensis R. M. Austin 1879-1 Lassen Eagle Lake. Comment
  UC1134718  Iris missouriensis Robert W. Gardner 1937-6-16 G- 17 Lassen Burgess Spring; Halls Flat Quad. 1699 Comment
  POM312929  Iris missouriensis H. L. Mason 1949-5-30 s.n. Lassen Northeast of Burney Falls 1524 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
  HSC28862  Iva axillaris D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19298 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  CHSC35570  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 miles west of Madeline. Comment
  CHSC68763  Ivesia paniculata Vernon H. Oswald; Lowell Ahart 1997-5-27 8494 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. On the north side of the creek paralleling the road. 1546 Comment
  JEPS81018  Ivesia paniculata Thomas W. Nelson and Jane P. Nelson 1980-7-6 5984 Lassen 16 mi e Adin (along Adin-Madeline Rd); Ash Valley; Ash Valley, Lassen Co. 1554 Comment
Read comments
Nov 22 2007
  JEPS91208  Ivesia paniculata Dean Wm. Taylor with Glenn Clifton 1990-6-12 10875 Lassen Ash Valley, ca. 2 miles W from junction of Spooker Road with Forest Road 39N08 Comment
  JEPS94475  Ivesia paniculata Vernon H. Oswald and Lowell Ahart 1997-5-27 8494 Lassen 0.1 mi e of Highway 139 (n of Susanville on Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat, on n side of a creek paralleling the road); Forest Route 38N04 1546 Comment
  RSA614443  Ivesia paniculata M. L. Carlson 1996-6-11 s.n. Lassen 16 miles southeast of Adin on County Road 527 Comment
  UC1567359  Ivesia paniculata G. Schoolcraft 1980-7-14 306 Lassen w of Madeline; Ash Valley 1548 Comment
  RSA0005627  Ivesia paniculata B. Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 mi W of Madeline Comment
  SEINET6792604  Ivesia paniculata M. J. Williams 1970-7-4 595 Lassen Near Ash Creek. 1280 Comment
  UC648318  Juncus balticus Leo Whitney 1934-8-2 1970 Lassen Bridge Creek Camp Lassen National Forest 1737 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
  UC1583258  Juncus bufonius Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9467 Lassen 5.6 km (3.5 mi) s Madeline (along Highway 395); Madeline Plains 1620 Comment
  CHSC117520  Juncus bufonius var. bufonius Lowell Ahart; John Dittes 2016-7-13 21140 Lassen Scattered along the south edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest ofk Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS121285  Juncus bufonius var. bufonius Lowell Ahart, John Dittes 2013-7-23 18907 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
  CHSC99280  Juncus bufonius var. congestus Lowell Ahart; John Dittes 2008-6-20 14958 Lassen In meadow, around a new pond, about 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  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
  JEPS67093  Juncus confusus Brown and Wieslander 1922-7-23 69 Lassen Martin Springs Eagle Lake Comment
  CHSC60787  Juncus hemiendytus var. abjectus Vernon H. Oswald; Lowell Ahart 1993-6-3 5481 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), where it diverges from Lassen 21 (32N02) to Eagle Lake, on the S side of Pine Creek Valley, between Poison Lake and Susanville. Along drainages and on the edge of a meadow. 1725 Comment
  CHSC117203  Juncus hemiendytus var. hemiendytus Lowell Ahart; John Dittes 2016-6-7 20991 Lassen West edge of pond, 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC60788  Juncus hemiendytus var. hemiendytus Vernon H. Oswald; Lowell Ahart 1993-6-3 5483 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), 2.4 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, on the W edge of Pine Creek Valley, between Poison Lake and Susanville. 1728 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
  SEINET3507366 Image available Juncus longistylis Marcus E. Jones 1897-6-30 Lassen Susanville, 4 miles below Eagle Lake Comment
  UC1133741  Juncus nevadensis A. Simontacchi 1940-6-7 894 Lassen 6.4 mi sse Beaver Spring; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1142989  Juncus nevadensis A. L. Hormay 1941-6-26 28 Lassen Westwood Junction Lassen National Forest 1737 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
  CHSC60461  Juncus orthophyllus Mary Ann Showers 1992-6-13 2537 Lassen Lassen Volcanic National Park. Meadow along trail from Snag Lake jct to Widow Lake. 1828 Comment
  JEPS126568  Juncus tiehmii Lowell Ahart, John Dittes 2016-6-7 20989 Lassen 50 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC117193  Juncus uncialis Lowell Ahart; John Dittes 2016-6-7 20990 Lassen 50 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  SEINET11738933  Juniperus californica L. V. Ritter 1969-1 191 Lassen E side Forward Rd., 8 mi NE Manton Comment
  CHSC117195  Juniperus occidentalis Lowell Ahart; John Dittes 2016-6-7 20974 Lassen 20 yards west of the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC12465  Juniperus occidentalis Robert W. Severin 1969-6-20 53 Lassen E. L. B. S., 150' n Vesta Holt Hall. 1566 Comment
  CHSC23332  Juniperus occidentalis Mark Stopher 1976-1-11 28 Lassen Collected 5 miles north on Eagle Lake turnoff, 3 miles west of Susanville on highway 36. 1463 Comment
  HSC1267  Juniperus occidentalis L. H. Myers 1963-4-10 40 Lassen 1.0 mi. S of Janesville 1280 Comment
  UCR1818  Juniperus occidentalis subsp. australis Frank C. Vasek 1962-9-3 620903- 04 Lassen Calif. Hwy 36, 3.6 mi west of the Ranger Station, west of Susanville 1524 Comment
  CHSC60293  Juniperus occidentalis var. occidentalis Mary Ann Showers 1992-6-13 2531 Lassen East shore of Butte Lake, ca 0.3 miles south of Butte Creek outlet. Lassen Volcanic National Park. 1841 Comment
  CHSC23328  Juniperus osteosperma Mark Stopher 1976-1-11 30 Lassen Ca. 52 miles south of Susanville on Hwy 395 then two miles east on Red Rock Road. 1328 Comment
  UCR3786  Juniperus osteosperma Frank C. Vasek 1964-9-12 640912- 04 Lassen 5.2-5.4 mi north of the junction of US Hwy 395 w/ Calif. Hwy 70 (alt. US Hwy 40) 1479 Comment
  POM68597  Kelloggia galioides Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  POM113359  Koeleria macrantha Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  RSA702594  Koeleria macrantha L. P. Janeway 2004-6-26 8149 Lassen About 1.3 km. west-southwest of Patterson Flat, at junction of roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  UCD85786  Koeleria macrantha Beecher Crampton 1960-6-18 5727 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD85987  Koeleria macrantha R. Tofsrud 1947-7-1 214 Lassen 13 miles E of Madeline. Comment
  CHSC59133  Kyhosia bolanderi Vernon H. Oswald; Lowell Ahart 1992-8-25 5195 Lassen Lassen Volcanic National Park. Slope at the SE corner of Snag Lake. 1853 Comment
  CHSC5067  Lactuca serriola L. Stites 1967-7-4 122 Lassen Collects at Eagle Lake Biology Station. 1371 Comment
  JEPS38999  Lagophylla ramosissima W. L. Jepson 1918-8-2 7776 Lassen Bedswith Pass 1463 Comment
  JEPS88243  Lagophylla ramosissima Vernon H. Oswald and Lowell Ahart 1996-6-17 7782 Lassen ca. 7 mi w Susanville (along Bizz Johnson Trail at 7 mile post on n side of Hwy 36 between trail and highway bridges spanning Susan River); Modoc Plateau 1432 Comment
  POM204133  Lagophylla ramosissima J. T. Howell 1934-6-10 11863 Lassen Honey Lake Valley, 37 miles S of Susanville. Comment
  CAS-BOT-BC341480  Lagophylla ramosissima Margaret Williams 1974-7-27 74 -L-62 Lassen Area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  POM54286  Lagophylla ramosissima Milo S. Baker 1894-7-5 s.n. Lassen Dixey Valley. Comment
  SEINET8584733  Lappula redowskii var. cupulata W. Harnach 2010-6-1 1240 Lassen Honey Lake Valley, on Fort Sage Road then 1 mile N on Cal-Neva Road, Alturus powerline, ca 10 miles NE of Doyle. 1219 Comment
  CHSC112414  Lasthenia glaberrima Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18739 Lassen Near a drainage filled with dirt from construction of a pond, about 100 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC92742  Lathyrus nevadensis var. nevadensis L. P. Janeway 2005-7-3 8451 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  CDA20367  Layia glandulosa D. Tillotson 1942-6-9 s.n. Lassen Modoc Plateau; Mud Flat. 0 Comment
  UC74071  Layia glandulosa J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Chat. Long Valley Comment
  CAS-BOT-BC321494  Layia glandulosa John Thomas Howell 1962-6-19 37888 Lassen Sagebrush flat, 3 mi S of Hallelujah Junction 1524 Comment
  POM54275  Layia glandulosa subsp. glandulosa Milo S. Baker 1890-1 s.n. Lassen Milford. Comment
  HSC95178  Lemna minuta Gordon Leppig 1998-7-12 935 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC88695  Lepidium acutidens M. S. Baker; Frank Nutting 1894-1-1 s.n. Lassen Dixey Valley. Comment
  JEPS114349  Lepidium campestre Lowell Ahart, John Dittes 2008-6-20 14957 Lassen In meadow, 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
  CAS-BOT-BC89721  Lepidium latifolium G. Schoolcraft 1987-9-24 1780 Lassen Along Riverside Drive in Susanville. 1310 Comment
  CHSC13634  Lepidium perfoliatum M. S. Taylor 1974-7-8 259 Lassen On e side of RT A3, ca. 1 mi n of Honey Lake, ca. 1 mi s of Standish, Honey Lake Wildlife Refuge. Comment
  CAS-BOT-BC12815  Lepidium perfoliatum Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16332 Lassen 13.5 miles east of Susanville. Comment
  HSC6828  Lepidium perfoliatum K. P. St. John 1965-5-6 28 Lassen Susanville, across from Walker's Restaurant Comment
  CHSC117207  Leptosiphon bolanderi Lowell Ahart; John Dittes 2016-6-7 20979 Lassen 10 yards west of the pond, 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 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
  CHSC60372  Leptosiphon harknessii Mary Ann Showers 1992-6-12 2518 Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  SEINET3364444 Image available Leptosiphon harknessii Marcus E. Jones 1897-7-2 Lassen Susanville Comment
  UCD159576  Leucanthemum vulgare D. S. Park 2011-6-27 313 Lassen Near Goodrich Mt. Between Rt. 36 and small stream. 1556 Comment
  UC1134625  Leucocrinum montanum A. Simontacchi 1940-5-17 752 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quad. 1699 Comment
  UC1553405  Leucocrinum montanum Gary Schoolcraft 1988-5-11 1794 Lassen n of Said Valley Reservoir (along Hwy 139) 1676 Comment
  CAS-BOT-BC508367  Leucocrinum montanum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49164 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  POM71468  Leucophysalis nana Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  HSC75895  Lewisia nevadensis D. H. Norris, S. Dowty, Thomas W. Nelson 1971-6-22 19194 Lassen Harvey Valley near Cone Springs Comment
  UC1037143  Leymus cinereus Leo Whitney 3335 Lassen Camp 10 <of> Fruit Grower's Supply Company Lassen National Forest Comment
  UC188958  Leymus cinereus Milo S. Baker Lassen Dixie Valley Comment
  UC584329  Leymus cinereus G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2227 Lassen 6 mi s Ravendale 1660 Comment
  UC70685  Leymus cinereus J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  UCD64268  Leymus cinereus L. D. Whitney 1935-6-27 Lassen Fruit Growers Supply Co. Camp #10. Comment
  RSA129541  Leymus condensatus C. W. Hanks 1934-8-18 57 Lassen Sierraville; N. W. part of Upper Long Valley 1616 Comment
  CDA18262  Leymus triticoides G. D. Barbe 1974-8-2 1924 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  RSA299171  Leymus triticoides J. T. Howell 1974-7-9 50467 Lassen Susanville 1296 Comment
  UC1131756  Leymus triticoides A. Simontacchi 1940-8-30 912 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UCD65590  Leymus triticoides R. Tofsrud 1947-7-1 218 Lassen Near Thermos. Comment
  UCD65616  Leymus triticoides L. Whitney 1933-8-1 s.n. Lassen Lassen National Forest. Near Sheepshead. 1889 Comment
  CAS-BOT-BC436030  Ligusticum grayi B. C. Cain 1925-8-24 106 Lassen 1 mi. below Drakesbad, Mt. Lassen Natio,al Park 1645 Comment
  CAS-BOT-BC130709  Lilium pardalinum Louella Bass 1973-6-15 114 Lassen Elysian Valley 1325 Comment
  JEPS23857  Limosella acaulis Peter H. Raven and Otto T. Solbrig 1958-6-17 13287 A Lassen along United State Highway 395, 1.8 mi s Ravendale Comment
  UC1101424  Limosella acaulis Herbert L. Mason and Verne Grant 1947-7-9 13293 Lassen 5 mi e Bieber Comment
  POM312522  Limosella aquatica Malcolm A. Nobs, S. Galen Smith 1949-7-20 1046 Lassen Bieber, along Highway 299. Comment
  RSA0089260  Linanthus aureus Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  RSA0037003  Linanthus bolanderi Lowell A. Ahart, John Dittes 2008-6-19 14892 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
  UC1523795  Linanthus bolanderi Gary Schoolcraft 1981-5-5 370 Lassen s of Adin (on e side of Hwy 139) 1325 Comment
  RSA716147  Linanthus ciliatus L. Ahart, John Dittes 2005-6-2 11936 Lassen About 1 1/2 miles northeast of the Anderson Ranch Home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1601 Comment
  SEINET10496792  Linanthus ciliatus Mary Susan Taylor 1974-1 Taylor 284 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC726829  Linanthus harknessii A. A. Heller 1938-7-28 15299 Lassen about 2 mi e Westwood 1524 Comment
  CHSC60841  Linanthus pungens Vernon H. Oswald; Lowell Ahart 1993-6-28 5594 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  CHSC92715  Linanthus pungens L. P. Janeway; B. Castro 2005-7-10 8479 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. Northerly-facing side of the crest. 1859 Comment
  RSA715980  Linum lewisii L. Ahart, John Dittes 2005-6-2 11935 Lassen Along the poor dirt road, 1/4 mile W of the Anderson Ranch home, Long Valley about 4 3/4 miles air N of the intersection of Scott Road and Hwy 70, 6.5 miles air NW of Hallelujah jct. 1499 Comment
  RSA123903  Linum lewisii G. A. Fischer, Irwin H. Johnson 1933-7-14 F 264 Lassen Lassen Forest. Slope S. 2 deg. 1768 Comment
  CHSC4888  Linum lewisii var. lewisii Bill Wilson 1967-7-1 7 Lassen Collected on Rd. #5.00, 2.5 mi. S of Eagle Lake Biological Station. 8 mi. N of Susanville. 1645 Comment
  UCD35730  Linum lewisii var. lewisii Beecher Crampton 1960-6-18 5714 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  SEINET10483062  Lithophragma brevilobum Mary Susan Taylor 1974-5-4 Taylor 228 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  OBI77066  Lithophragma glabrum Anthony Baniaga 2011-6-7 316 Lassen Lassen NF. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad T32N R7E sec 11 SW of NE 1747 Comment
  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
  UC1483825  Lithophragma glabrum G. Schoolcraft 1980-4-8 201 Lassen e side Shaffer Mountain; e side Shaffer Mountain 1463 Comment
  CHSC71099  Lithophragma tenellum Vernon H. Oswald; Lowell Ahart 1998-5-22 9127 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  UC1127235  Lithophragma tenellum A. Simontacchi 1940-5-10 693 Lassen 4.4 mi sse of B.M. 7310 on Blacks Mtn; Lassen National Forest, Halls Flat Quad. Comment
  CDA42915  Lithospermum arvense L. Ahart, John Dittes 2012-7-11 18351 Lassen North edge of a farmed field, on the south side of the highway, about 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittville, 3955 feet east of Lassen-Shasta County Line, Fall River Valley. Comment
  JEPS21376  Lithospermum ruderale Brown and Wieslander 1922-6-13 64 Lassen Martin Springs Eagle Lake (Eagle Lake) Comment
  UC131185  Loeflingia squarrosa var. artemisiarum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  CHSC7698  Lolium multiflorum Beverley J. Wise 1969-5-23 132 Lassen 34.8 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  JEPS15825  Lomatium bicolor var. leptocarpum M. S. Baker and Franklin P. Nutting 1894-6-20 Lassen near Bieber (Big Valley); Big Valley Comment
  UC1123089  Lomatium bicolor var. leptocarpum A. Simontacchi 1940-5-14 710 Lassen 10.2 mi E of Coyote Spring 1699 Comment
  CHSC29900  Lomatium dissectum var. multifidum Robin Ondricek 1978-6-8 44 Lassen Ridge E of Lower Dry Lake in area between basalt and loam. 1767 Comment
  CHSC92830  Lomatium dissectum var. multifidum Lowell Ahart; John Dittes 2005-6-2 11930 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  JEPS107835  Lomatium dissectum var. multifidum Lowell Ahart, John Dittes 2005-6-2 11930 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  RSA271913  Lomatium donnellii Christopher Davidson 1975-6-7 2755 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  NY1141204  Lomatium donnellii M. Lavin 1982-5-16 4064 Lassen 1.5 miles east of Hallelujah Junction (U.S. 395). 22 air miles 325° from Reno, Nevada. West side of Petersen Range 1676 Comment
  HSC81652  Lomatium macrocarpum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6028 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
  RSA724325  Lomatium macrocarpum Richard Halse 1977-5-22 1549 Lassen Along Highway 395, 9.5 miles north of Madeline 1490 Comment
  UC1523794  Lomatium nevadense Gary Schoolcraft 1981-4-23 365 Lassen Ash Valley 1524 Comment
  UC1123082  Lomatium nevadense var. nevadense A. Simontacchi 1940-5-10 689 Lassen 7.3 mi. w. Harvey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  UC1567383  Lomatium nevadense var. nevadense G. Schoolcraft 1989-5-3 1864 Lassen near Karlo (n.w. corner Secret Valley); Secret Valley 1356 Comment
  SEINET5333506  Lomatium nevadense var. nevadense D. H. French 1968-6-3 2883 Lassen Near Hwy, 395, 1.1 mi S of Ravendale, just behind gas station-cafe-bar building. Comment
  UC1123086  Lomatium nevadense var. parishii A. Simontacchi 1940-5-14 709 A Lassen 10.2 mi e Coyote Spring; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1123087  Lomatium nudicaule A. Simontacchi 1940-6-13 856 Lassen 3.3 mi. w.-s.w. Patterson Mt. (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  CHSC71066  Lomatium plummerae Vernon H. Oswald; Lowell Ahart 1998-5-22 9111 Lassen Road to ORV parking area in Fort Sage Mtns. 0.6 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. 1402 Comment
  CAS-BOT-BC217797  Lomatium ravenii Lincoln Constance; E. DiFulvio 1962-4-16 3747 Lassen 1 mile S of Ravendale 1615 Comment
  CHSC27666  Lomatium ravenii Robert A. Schlising 1978-7-2 3309 Lassen Ca 1.5 mi S Ravendal, near jct hwy 395 and horse Lake Road; large population between Horse Lake Road and S. Pac. RR tracks. 1621 Comment
  NY406056  Lomatium ravenii L. Constance 1959-6-14 3672 Lassen One mile south of Ravendale 1463.0 Comment
  RSA0049623  Lomatium ravenii Dean Wm. Taylor 2012-5-17 21208 Lassen Madeline Plains, at the western base of Juniper Ridge (ca. 5 miles E of Termo) 1615 Comment
  UCR183195  Lomatium ravenii Jim Andre, G. L. Clifton 1993-6-2 7716 Lassen Along Hwy 395 c. 25 mi NE of Susanville at Viewland exit, east of Shaffer Mtn 1349 Comment
  RSA0049611  Lomatium vaginatum Dean Wm. Taylor 2012-6-7 21232 Lassen Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139 1635 Comment
  OBI81601  Lomatium vaginatum Tracey Call, Viola Call 1961-5-30 2052 Lassen Lassen-Modoc Co. line near highway U.S. 395. 1676 Comment
  GMDRC7741  Lotus corniculatus J. M. Andre, G. Clifton 1993-6-11 33422 Lassen Modoc Plateau: NW of Snowstorm Mtn, approx. 3 mi. east of Horse Lake, 12 mi. S of Ravendale 1545 Comment
  POM28313  Lotus crassifolius Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CDA27197  Lotus denticulatus T. C. Fuller 1963-6-1 10621 Lassen West side of road to Susanville, 2.0 miles south of Pittville. 0 Comment
  UC1523783  Lotus oblongifolius var. oblongifolius Gary Schoolcraft 1981-7-14 534 Lassen s of Pittville (along Beaver Creek); Beaver Creek 1158 Comment
  UC15724  Lotus oblongifolius var. oblongifolius M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake 1524 Comment
  UC507000  Lotus purshianus var. purshianus George A. Fischer and Irwin H. Johnson 1933-7-12 F- 193 Lassen Grass Valley Lassen Forest 1694 Comment
  CAS-BOT-BC198254  Lupinus John Thomas Howell 1976-7-19 51949 Lassen Southwest of Susanville on Gold Run Road 1341 Comment
  RSA519408  Lupinus Rockwell 1925-7-1 s.n. Lassen Beckwith Comment
  CHSC118483  Lupinus angustiflorus Don Lepley 2015-6-14 Lassen Lassen National Forest. Eagle Lake Ranger District. Along Road 32N73 about 0.4 air mile east-southeast of Antelope Mt. Lookout and about 18 air miles northwest of Susanville. UTM 677436 x 4495404 2244 Comment
  CHSC5286  Lupinus arbustus 1944-7-19 Lassen Juniper Lake. 2055 Comment
  JEPS28489  Lupinus arbustus George W. Gillett 1957-7-29 956 Lassen near the Butte Lake Trail (above Snag Lake); , near the Butte Lake Trail 1859 Comment
  SEINET10484619  Lupinus arbustus subsp. calcaratus Jeffrey Huber 1971-6-2 Huber 110 Lassen 4 miles s of adin along cal hwy 139 in basalt - caly; valley floor in artemisia 1341 Comment
  SEINET194956  Lupinus arbustus subsp. silvicola A. A. Heller 1938-6-4 15142 Lassen In open places just west of Fredonyer Pass east of Westwood. 1707 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-BC208738  Lupinus argenteus var. heteranthus W. W. Eggleston 1927-7-14 21510 Lassen Willow Creek, near Hayden Hill, Modoc Forest 1500 Comment
  CAS-BOT-BC208745  Lupinus argenteus var. heteranthus John Thomas Howell 1974-7-8 50461 Lassen Susanville - Sierra Nevada 1295 Comment
  CAS-BOT-BC208756  Lupinus argenteus var. heteranthus Frank W. Peirson 1926-6-24 6852 Lassen Madeline Plains Comment
  CHSC7678  Lupinus argenteus var. heteranthus Beverley J. Wise 1969-5-18 61 Lassen 7.7 mi. East of Susanville on the south side of Las. Co. Rd. 125. 1341 Comment
  UC127527  Lupinus argenteus var. heteranthus J. Burtt Davy Jun 17-24, 1897 Lassen Honey Lake Valley Comment
  SEINET5327809  Lupinus argenteus var. heteranthus G. Schoolcraft 1997-5-14 2589 Lassen W slope of Ft. Sage Mtns. 3 mi N of Doyle 1311 Comment
  CAS-BOT-BC208837  Lupinus argenteus var. meionanthus Clare B. Hardham 1969-8-28 s.n. Lassen West of Janesville - Sierra Nevada Comment
  SEINET3145129  Lupinus caudatus E. K. Balls 1950-5-9 15948 Lassen 6 mi S of Doyle 1372 Comment
  RSA91348  Lupinus caudatus F. W. Peirson 1926-6-24 6852 Lassen Madeline Plain. Comment
  SEINET530758  Lupinus caudatus var. caudatus Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 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
  CHSC91961  Lupinus lepidus var. confertus Richard R. Halse 2004-7-22 6670 Lassen Along U.S. Hwy. 395 ca. 7.8 miles southeast of Susanville. 1293 Comment
  SEINET249342  Lupinus lepidus var. confertus Richard R. Halse 2004-7-22 6670 Lassen Along U.S. Hwy. 395 ca. 7.8 miles southeast of Susanville. 1293 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
  UC527349  Lupinus lepidus var. confertus C. B. Wolf 1931-9-6 2404 Lassen on the road to Wendel 1/2 mi from Janesville (western edge of Honey Lake Valley); western edge of Honey Lake Valley 1280 Comment
  NY747210  Lupinus lepidus var. confertus G. Schoolcraft 1982-7-14 782 Lassen Along Highway 395 near Janesville 1311 Comment
  SEINET8051629  Lupinus lepidus var. confertus M. J. Williams 1983-7-31 83- 126 -1 Lassen Roadside near Janesville 1280 Comment
  UC82212  Lupinus lepidus var. sellulus Mrs. R. M. Austin Aug 1882 Lassen Kings Valley Comment
  OBI76907  Lupinus leucophyllus Anthony Baniaga 2011-7-9 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  JEPS126528  Lupinus microcarpus var. microcarpus Lowell Ahart, John Dittes 2016-6-7 21018 Lassen On the west edge of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  UC199306  Lupinus microcarpus var. microcarpus Franklin P. Nutting Lassen Dixey Mts. South side Comment
  SBBG67020  Lupinus obtusilobus S. W. Hutchinson -Jun-1925 525 Lassen Eagle Lake 1554 Comment
  RSA0005616  Lupinus onustus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  SEINET10871082  Lupinus polycarpus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2576 Lassen 6 mi. S of Adin; along California Hwy. 139 right-of-way. 1372 Comment
  CHSC64788  Lupinus pusillus var. intermontanus Vernon H. Oswald 1995-5-31 6818 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 3.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  UC1523758  Lupinus saxosus Gary Schoolcraft 1983-6-7 968 Lassen near Ash Valley 1706 Comment
  UC429126  Luzula comosa var. laxa Franklin P. Nutting Lassen Pine Creek Northern California, Pine Creek Comment
  JEPS107819  Lythrum hyssopifolia Lowell Ahart, John Dittes 2005-6-2 11969 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  JEPS121263  Lythrum hyssopifolia Lowell Ahart, John Dittes 2013-7-23 18896 Lassen Along S margin of the levee road, about 100 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS121287  Lythrum tribracteatum Lowell Ahart, John Dittes 2013-7-23 18902 Lassen About 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CDA8224  Machaeranthera canescens T. C. Fuller 1964-10-8 12703 Lassen Head of Secret Valley, south of Ravendale. 0 Comment
  UC1567356  Madia citriodora G. Schoolcraft 1989-6-5 1897 Lassen intersection of Highway 139 and A2 s Adin 1341 Comment
  SD132249  Madia elegans G. Helmkamp 1990-9-23 A 6 Lassen 3.0 miles east of Susanville, along State Road 36. 1340 Comment
  UC469045  Madia exigua Franklin P. Nutting Lassen Dixie Valley Comment
  CAS-BOT-BC334687  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  CAS-BOT-BC334690  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  JEPS117590  Madia gracilis Lowell Ahart, John Dittes 2010-7-31 17006 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin Comment
  CAS-BOT-BC343061  Madia gracilis Noel H. Holmgren; Patricia K. Holmgren 1980-7-4 9497 Lassen Observation Peak, south base in upper Smoke Creek drainage, 19 km (12 mi) airline distance east-southeast of Ravendale 1680 Comment
  SEINET481268  Madia gracilis N. H. Holmgren, P. K. Holmgren 9497 1980-7-4 Lassen Observation Peak, sousth obase in upper Smoke Creek drainage, 19 km (12 miles) airline distance east-southeast of Ravendale Comment
  CAS-BOT-BC347442  Malacothrix floccifera John Thomas Howell; Gordon H. True 1973-8-1 50158 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  UC1523757  Malacothrix floccifera Gary Schoolcraft 1983-7-6 1068 Lassen w of Susanville (n of Gold Run Road) 1463 Comment
  CAS-BOT-BC347437  Malacothrix floccifera Clare B. Hardham 1961-6-16 7491 Lassen Sierra Nevada Mountains. Gold Run Creek south of Susanville Comment
  CHSC80607  Malacothrix glabrata V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10038 Lassen North-northeast of Doyle on a dirt road bordering the east side of Turtle Mountain. 1828 Comment
  CHSC4978  Malva neglecta R. Clicquennoi 1967-6-23 11 Lassen In a large vernal pool area 1/4 mi n of Eagle Lake Biology Station, e central side of Eagle Lake. 1554 Comment
  CHSC58832  Marsilea oligospora Vernon H. Oswald; Lowell Ahart 1992-7-16 5126 Lassen Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), 1.0 mi E of Willow Spring Rd, (Forest Rd. 31N56), between Old Station and Susanville. 1745 Comment
  CHSC13512  Marsilea vestita K. R. Stern 1974-6-26 Lassen On s side of Hwy 44, 5.6 mi n of intersection with County Rd. A-21 to Westwood. Comment
  CHSC6212  Marsilea vestita J. B. Kimsey 1946-6-24 Lassen Pine Creek, Eagle Lake. 1584 Comment
  UC62270  Marsilea vestita subsp. vestita J. Burtt Davy Jun 17 1897-Jun 24 1897 3308 Lassen Honey Lake Valley Comment
  CHSC99286  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
  CHSC29877  Matricaria occidentalis Robin L. Ondricek 1978-8-26 127 Lassen At roadside ca. .5 mi n of turn-off to ELFS on Hwy 139. 1493 Comment
  RSA715988  Medicago lupulina L. Ahart, John Dittes 2005-6-2 11966 Lassen Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1409 Comment
  UCD107934  Medicago sativa P. B. Kennedy 1927-9-1 s.n. Lassen Standish. Comment
  CHSC68889  Melica fugax Vernon Oswald; Lowell Ahart 1997-6-24 8645 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  UC593538  Melica stricta E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1771 Lassen Red Rock 1280 Comment
  UCD88494  Melica stricta L. Whitney 1933-8-1 s.n. Lassen Near Slate Creek. 1920 Comment
  JEPS121277  Melilotus officinalis Lowell Ahart, John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS63459  Mentha canadensis W. L. Jepson 1918-8-2 7784 Lassen on lower bench Long Valley Creek (1 mi below Boni Ranch house, Long Valley); Long Valley, on lower bench of Long Valley Creek 1371 Comment
  CHSC106683  Mentzelia albicaulis B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CHSC71128  Mentzelia albicaulis Vernon H. Oswald 1998-5-22 9137 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. 1341 Comment
  JEPS107449  Mentzelia albicaulis Lowell Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  RSA715553  Mentzelia albicaulis L. Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4.25 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1434 Comment
  RSA7885  Mentzelia albicaulis H. A. Barker 1927-7-15 807 Lassen Desert east of Beckwith [Beckwourth], near highway. Comment
Read comments
Dec 30 2016
  SFV2374  Mentzelia albicaulis I. L. Wiggins, D. B. Wiggins 1961-6-11 16340 Lassen 13.5 miles east of Susanville. 1240 Comment
  UCD55287  Mentzelia albicaulis Ellen Dean; Gary Schoolcraft 2006-5-16 3106 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1244 Comment
  CDA36651  Mentzelia albicaulis S. E. Piper 1943-7-2 Lassen 0.5 mile east of Herlong. 0 Comment
  JEPS124818 Image available Mentzelia albicaulis M. L. Wheelis 1964-6-30 128 Lassen 11.5 miles north fo Susanville on highway 139. Comment
  UC73419  Mentzelia congesta Milo S. Baker 1890-1 Lassen Honey Lake Valley Comment
  CHSC29933  Mentzelia dispersa Robin L. Ondricek 1978-6-22 67 Lassen In rocky soil among Jeffrey Pines at the n end of Mahogany Lake. 2057 Comment
  CHSC4437  Mentzelia dispersa K. R. Stern 1967-6-30 2448 Lassen West Central side of Eagle Lake. 1554 Comment
  HSC26603  Mentzelia veatchiana D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19284 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  CHSC101036  Micranthes nidifica John Dittes 2008-5-22 1522 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. 482 Comment
  CAS-BOT-BC429080  Micranthes odontoloma George W. Gillett 1957-7-22 886 Lassen Lassen Volcanic National Park. Snag Lake. Near campsite at south end of Lake. 1850 Comment
  SD8379  Micranthes tolmiei Mrs. R. M. Austin Aug 1882 Lassen Lassen Co Calif Comment
  NY539941  Micromonolepis pusilla A. Tiehm 1986-5-12 10351 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek 1341.1 Comment
  JEPS118157  Microseris laciniata subsp. laciniata Dean W. Taylor 2009-5-21 20606 Lassen Susanville; Susanville Peak, northerly flank along logging roads ca. 1.5 air miles E of Round Valley Reservoir 1706 Comment
  RSA702595  Microseris nutans L. P. Janeway 2004-6-26 8152 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
  CHSC6206  Microsteris gracilis C. Palmiter 1946-6-20 Lassen Grasshopper Valley. Eagle Lake. 1624 Comment
  SEINET4673741  Microsteris gracilis Leigh A. Johnson 1993-4-23 93 -004 Lassen Jct. HWY 395 and road to Ramhorn Campground and Painter Flat ca. 60 miles south of Alturis. 1650 Comment
  RSA122924  Microsteris gracilis subsp. humilis L. R. Short 1936-5-7 S- 343 Lassen MDM, Burgess Spring Experiment Range. 1738 Comment
  RSA122925  Microsteris gracilis subsp. humilis L. R. Short, Wm. Gansberg 1936-6-2 S- 363 Lassen Lassen [National] Forest. MDM, Burgess Spr. Exp. Range 1860 Comment
  RSA104218  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-17 9799 Lassen South of Secret Valley, north of Litchfield 1311 Comment
  RSA104220  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-18 21757 Lassen Sage brush flat about Lassen County: 8 miles S of Madeline 1280 Comment
  UC1609131  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-6-28 5609 Lassen ne Poison Lake (n of Hwy. 44 on Rd. 33N06, nne of Burgess Meadow, sse flank of mtn.); Harvey Mtn. 1798 Comment
  UC1037226  Mimulus breweri Leo Whitney 1933-8-14 1596 a Lassen ca. 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  JEPS88205  Mimulus breweri Vernon H. Oswald and Lowell Ahart 1996-6-24 7866 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake, Modoc Plateau, Montane Meadow in Yellow Pine Forest, on the W side of the meadow ca. 0.2 mi S of the cabin. 1633 Comment
  CHSC118485  Mimulus evanescens Allison Sanger; Loren Gehrung 2003-6-11 Lassen Lassen National Forest. Eagle Lake Ranger District. Near Rankin Flat west of Spalding, roughly 1.2 air miles west of Eagle Lake marina. 1822 Comment
  JEPS4710  Mimulus floribundus A. A. Heller 1938-6-22 15185 Lassen 1 mi s Westwood 1524 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
  JEPS107380  Mimulus mephiticus Lowell Ahart, John Dittes 2005-6-1 11869 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS94563  Mimulus mephiticus Vernon Oswald and Lowell Ahart 1997-6-24 8597 Lassen on Forest Rd. 29N43 1.2 mi e Gold Run Rd. (29N10) (n side of mt., s of Susanville); Diamond Mtn. 1685 Comment
  JEPS28704  Mimulus microphyllus George W. Gillett 1957-7-28 930 Lassen 1 mi above Butte Lake (on Widow Lake trail); Lassen Volcanic National Park 1905 Comment
  JEPS80675  Mimulus microphyllus L. R. Heckard and T. I. Chuang 1981-6-10 5527 Lassen 2.3 mi w Nubiebar (along route 299) 1341 Comment
  UC1063127  Mimulus microphyllus A. Simontacchi 1940-6-15 861 Lassen 2.3 mi ssw Cone Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC773851  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  UC445158  Mimulus moniliformis Franklin P. Nutting July 12 Lassen Pine Creek Comment
  CHSC59100  Mimulus moschatus Vernon H. Oswald; Lowell Ahart 1992-8-25 5182 Lassen Lassen Volcanic National Park. Grassy creek near the S end of Snag Lake. 1853 Comment
  SEINET10830517  Mimulus nanus Mary Susan Taylor 1974-1 Taylor 311 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  SEINET10929288  Mimulus nanus Paul Gallian, David B. Dunn 1971-6-2 Gallian 467 Lassen 6 mi n of halleluja jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  JEPS63626  Mimulus nanus var. jepsonii G. S. Crew and C. S. Robinson 1927-6-25 23 Lassen near Wetwood Junction; Lassen Forest, Norval Flat 1747 Comment
  HSC22945  Mimulus nanus var. mephiticus John Pratt 1970-6-27 48 Lassen 0.5 mi. E of Turtle Head 1220 Comment
  LA209350  Mimulus nanus var. mephiticus A. A. Heller; P. B. Kennedy 1907-7-1 sn Lassen Near Old Chat Comment
  POM181073  Mimulus nanus var. mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. 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
  RSA80410  Mimulus nanus var. mephiticus F. W. Peirson 1926-6-24 6853 Lassen Madeline Plain. Comment
  UC1537591  Mimulus nanus var. mephiticus Gordon H. True Jr. 1936-6-26 548 Lassen 2 mi e Eagle Lake (head of creek); Willow Creek 1584 Comment
  RSA422232  Mimulus nanus var. nanus Christopher Davidson 1975-6-7 2764 Lassen 1 mi E of Beckwourth Pass on Hwy 70. 1524 Comment
  JEPS79150  Mimulus torreyi L. R. Heckard with R. Bacigalupi 1980-6-12 5255 Lassen ne Westwood (near golf course) 1554 Comment
  NY813498  Mirabilis laevis var. retrorsa M. Bourell 1997-5-31 5881 Lassen Wendel Road 10.9 miles southeast of Highway 395. 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
  UC1137693  Monardella odoratissima subsp. glauca George A. Fischer, Irwin H. Johnson 1933-7-12 F 225 Lassen Lassen National Forest 1722 Comment
  LA54185  Monardella odoratissima subsp. glauca Carl Epling; William Robison 1935-7-15 sn Lassen Fredonyor Pass Comment
  CAS-BOT-BC213931  Monardella odoratissima subsp. pallida Ralph K. Gierisch 1968-7-11 3354 Lassen Highway 44, Lassen National Forest 1737 Comment
  CAS-BOT-BC222148  Monardella odoratissima subsp. pallida Geo. A. Fisher 1928-6-12 27 Lassen Lassen National Forest 1615 Comment
  JEPS63401  Monardella odoratissima subsp. pallida Jos. Grinnell 1928-6-28 Lassen Near Butte Lake 1889 Comment
  CHSC64782  Monolepis nuttalliana Vernon H. Oswald 1995-5-31 6808 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 1.3 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  JEPS114695  Monolepis nuttalliana Lowell Ahart, John Dittes 2002-6-20 14973 Lassen W of where the levee road crosses Big Valley Canal, in Big Valley, about 4 mi (air) NE of the Headquarters at Ash Creek State Wildlife Area, about 7 mi (air) NE of Bieber 1263 Comment
Read comments
Oct 5 2019
  CAS-BOT-BC444846  Montia fontana G. Schoolcraft 1995-5-16 2478 Lassen 2 mi. east of Bull Flat. 1615 Comment
  OBI77069  Montia linearis Anthony Baniaga 2011-6-7 314 Lassen Lassen NF. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad T32N R7E sec 11 SW of NE 1747 Comment
  SEINET5334396  Montia linearis J. Young 1982-6-9 s.n. Lassen M. Meyer's Ranch, Adin, Ca. 1372 Comment
  CAS-BOT-BC262634  Muhlenbergia asperifolia John Thomas Howell; G. H. True 1973-8-1 50147 Lassen In Mountain Meadows east of Westwood 1554 Comment
  UC1024645  Muhlenbergia asperifolia Leo Whitney 1934-7-4 2212 Lassen sand dunes near north shore; Lassen National Forest, Eagle Lake 1584 Comment
  UCD86548  Muhlenbergia asperifolia John Thomas Howell; Gordon H. True 1973-8-1 50147 Lassen Roadside in Mountain Meadows east of Westwood. 1554 Comment
  RSA268993  Muhlenbergia filiformis J. R. Reeder, C. G. Reeder 1972-7-24 5811 Lassen Lassen National Forest; 17 miles NW of Susanville, along Hwy 44 1128 Comment
  UC1024822  Muhlenbergia filiformis Leo Whitney 1935-6-21 3250 Lassen meadow Lassen National Forest, Fruit Grower's Supply Company, Camp Comment
  SD109577  Muhlenbergia jonesii John R. Reeder, Charlotte G. Reeder 1972-7-24 5809 Lassen 22 miles NW of Susanville in vicinity of Silver Lake, along State Hwy. 44, Lassen National Forest 1707 Comment
  UC1024803  Muhlenbergia richardsonis Leo Whitney 1935-6-23 3290 Lassen meadow Lassen National Forest, Fruit Grower's Supply Company, Camp Comment
  UCD86955  Muhlenbergia richardsonis Malcolm A. Nobs; S. Galen Smith 1949-7-21 1060 Lassen 4 miles N of Madeline. Comment
  CAS-BOT-BC515652  Muilla transmontana B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6599 Lassen U.S. Hwy. 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield. 1330 Comment
  UC1483824  Muilla transmontana G. Schoolcraft 1980-6-6 255 Lassen sw Herlong; Bird Canyon 1341 Comment
  CAS-BOT-BC515653  Muilla transmontana John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49163 Lassen Elysian Valley northwest of Jamesville 1051 Comment
  NY492639  Myosurus apetalus K. L. Chambers 1963-5-4 2026 Lassen Highway 395, 10 miles north of junction with Alt. Highway 40 (later renumbered as Highway 70). Comment
  CAS-BOT-BC392254  Myosurus apetalus Margaret J. Williams; Gary Schoolcraft; Arnold Tiehm; Arnold Tiehm 1986-5-14 86- 38 -3 Lassen Tuledad Canyon Rd., from Duck Flat to Ravendale. 0.1 mi from Calif-Nev line Comment
  CHSC118856  Myosurus minimus L. P. Janeway; B. Castro 2015-6-5 11769 Lassen Great Basin, Modoc Plateau. Along County Road 512 16.9 road-km south from Surprise Valley Road towards Tuledad Canyon; ina small northwestern drainage into Post Canyon; 2.3 air-km east-southeast of Little Hat Mountain. 1837 Comment
  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
  NY492693  Myosurus minimus P. H. Raven 1958-6-17 13285 Lassen Along U. S. Highway 395, 1.9 miles south of Ravendale Comment
  CAS-BOT-BC83321  Myosurus minimus Clarence R. Quick 1962-6-17 62 25 C Lassen Swains Hole, a man-made pond south of Blacks Mountain Experimental Station. 1554 Comment
  SEINET3095964 Image available Myriophyllum sibiricum Arnold Tiehm, Gary Schoolcraft 1984-8-14 9243 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1698 Comment
  CHSC114695  Myriophyllum sibiricum J. R. Keck Jr.; D. L. Haws 1978-9-6 Lassen Eagle Lake; at the public boat ramp at Spaulding Resort. At shoreline. Comment
  POM312396  Myriophyllum sibiricum S. Galen Smith, Malcolm A. Nobs 1949-7-20 1049 Lassen 4 miles west of Adin. Comment
  RSA634201  Myriophyllum sibiricum Robert F. Thorne, C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir: Near junction of Grasshopper Road and Highway 139. Comment
  SEINET12185161  Myriophyllum sibiricum A. Tiehm, Schoolcraft, G. 1984-1 9243 Lassen Buckhorn Resevoir on the south side of Buckhorn road to Ravendale, about 6 mi W of state line T35N 1698 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
  CHSC25310  Nama aretioides Pauleen Broyles 1977-6-1 157 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 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
  JEPS107300  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
  JEPS87403  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
  UC1537486  Navarretia breweri Gordon H. True Jr. 1936-6-25 541 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  HSC63771  Navarretia breweri Teresa Prendusi 1980-5-20 Lassen Snowstorm Mtn. along spring area and 4 mi. W of Hwy. 395 1524 Comment
  UC1124159  Navarretia divaricata A. Simontacchi 1940-5-28 777 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1767 Comment
  CHSC117216  Navarretia intertexta Lowell Ahart; John Dittes 2016-6-7 21001 Lassen Near Stonebreaker Road, 0.7 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  SEINET3894760  Navarretia intertexta Leigh A. Johnson, Haley M. Smith 2011-6-25 11 -065 Lassen Along Hwy 299 about 9.4 miles east of jct with Hwy A2 and 1.4 west of jct with Hwy 139, southwest of Adin.; 0 Comment
  CHSC23856  Navarretia intertexta subsp. propinqua Glenda Foster 1975-7-12 101 Lassen Along edges of Fall River Mills Road ca. 1 mile n of Highway 44. Comment
  CHSC34346  Navarretia intertexta subsp. propinqua K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5808 Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  JEPS121307  Navarretia intertexta subsp. propinqua Lowell Ahart 2013-7-22 18853 Lassen 10 yards S of a man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SJSU11522  Navarretia intertexta subsp. propinqua J. W. Tilden 1960-6-27 1519 Lassen by Moonlight Rd 5 mi E of Westwood 1524 Comment
  SJSU11520  Navarretia leucocephala subsp. bakeri J. W. Tilden 1958-6-27 1295 Lassen Madeline, Madeline Plains 1615 Comment
  CHSC34342  Navarretia leucocephala subsp. minima K. R. Stern 1974-6-26 5853 Lassen Ca. 0.2 mi n of Hwy. 44, on Pittville Rd. Comment
  CHSC6209  Navarretia leucocephala subsp. minima J. B. Kimsey 1946-6-11 Lassen Pine Creek near Eagle Lake. 1554 Comment
  UC1112252  Navarretia leucocephala subsp. minima R. C. Bacigalupi with S. Galen Smith 1957-6-28 6002 Lassen 3.1 mi s Madeline (Highway 395); Madeline Plains 1615 Comment
  UC1537488  Navarretia leucocephala subsp. minima Gordon H. True Jr. 1936-6-25 528 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  UC23714  Navarretia leucocephala subsp. minima M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake 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
  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
  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
  JEPS107402  Nemophila parviflora var. austiniae Lowell Ahart, John Dittes 2005-6-1 11898 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  UC1137711  Nemophila parviflora var. austiniae L. R. Short and J. Warren 1936-6-9 S- 404 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1844 Comment
  UC67087  Nemophila parviflora var. austiniae T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  RSA122626  Nemophila parviflora var. austiniae L. R. Short, J. Warren 1936-6-9 S- 404 Lassen Burgess Spring Experiment Range. 1845 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
  CHSC4447  Neoholmgrenia andina K. R. Stern 1967-6-24 2416 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC13736  Nicotiana attenuata S. Villard 1973-7-16 50 Lassen 2 miles north of Eagle Lake Marina on dirt road going to Eagle Lake Field Station. Roadside. 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
  HSC21267  Nicotiana attenuata M. T. Milligan 1964-8-23 238 Lassen 400 yards E of Siad Valley Reservoir on Termo Rd. 1524 Comment
  POM103204  Nitrophila occidentalis Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  CDA18261  Nothocalais alpestris G. D. Barbe 1974-8-2 1923 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC54175  Nothocalais troximoides Vernon H. Oswald 1991-5-28 4627 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. East of the barn. 1264 Comment
  UC1609121  Nothocalais troximoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5529 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (on w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), dunes on upper beach between road and lake); Eagle Lake 1566 Comment
  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
  HSC16519  Oenothera californica R. G. Means 1962-7-4 64 Lassen 10 mi. N of Doyle, Hwy. 395 1220 Comment
  UCD106858  Oenothera deltoides R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  UC566272  Oenothera deltoides subsp. piperi E. Sawyer 1935-6-27 231 Lassen Long Valley Sierraville Quadrangle 1310 Comment
  UC174846  Oenothera elata subsp. hirsutissima T. S. Brandegee 1892-6-29 Lassen Janesville Comment
  HSC22961  Oenothera elata subsp. hirsutissima John Pratt 1970-7-18 77 Lassen 1 mi. E of Milford Comment
  RSA8247  Oenothera flava Elmer I. Applegate 1929-6-24 5881 Lassen Big Valley south of Bieber Comment
  UC524174  Oenothera flava subsp. flava Elmer I. Applegate 1929-6-24 5881 Lassen s Bieber; Big Valley Comment
  SEINET8884758  Olsynium douglasii R. Mills 1956-4-29 13 Lassen 7 miles south of Susanville, , along a creek bed on south side of hill. 1279 Comment
  CDA18274  Onobrychis viciifolia G. D. Barbe 1974-8-2 1940 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC71384  Onopordum acanthium Vernon H. Oswald; Beth Corbin, Gary Schoolcraft 1998-7-13 9262 Lassen Near Bieber on Susanville Rd. (A2) 2.5 mi east of Hwy. 299. Roadside and fields. 1280 Comment
  CAS-BOT-BC349945  Onopordum acanthium O. Havens 1963-8-9 s.n. Lassen P. S. Hall ranch, Doyle Comment
  CAS-BOT-BC350045  Oreostemma alpigenum var. andersonii Alice Eastwood 1912-8-22 1899 Lassen Battle Creek Meadow, Lassen Butte Region Comment
  UC1037281  Oreostemma alpigenum var. andersonii Leo Whitney 1934-9-16 1718 Lassen Bumpass Hell Lassen National Park 2529 Comment
  HSC97139  Oreostemma elatum Martin J. Lenz 2005-7-20 2042 Lassen N slope od Dryer Mtn.; approx. 1.4 air mi. N of summit: Roseburg Resources Co. 1822 Comment
  CAS-BOT-BC499905  Orobanche fasciculata John Thomas Howell 1962-6-19 37891 Lassen Sierra Nevada: 3 mi S of Hallelujah Junction 1524 Comment
  CAS-BOT-BC500324  Orobanche uniflora subsp. occidentalis H. C. Cantelow 1941-5-22 s.n. Lassen Fredonyer Pass, 18.5 mi W of Susnville, Hwy 36 Comment
  POM44324  Orthocarpus cuspidatus subsp. copelandii Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  JEPS17630  Orthocarpus cuspidatus subsp. cryptanthus Rimo Bacigalupi with G. T. Robbins 1955-7-20 5412 Lassen 4.4 mi s Patterson Ranger Station (near eastern edge of Long Valley Meadow, southern tip of the Warner Mountains); southern tip of Warner Mountains, eastern edge Long Valley M 2057 Comment
  RSA337231  Orthocarpus hispidus Noel Holmgren, Patricia K. Holmgren 1980-7-3 9483 Lassen US Highway 395, 7.4 km (4.6 mi) S of Ravendale. 1620 Comment
  RSA39737  Orthocarpus lacerus Philip A. Munz 1947-5-20 11890 Lassen Milford. 1265 Comment
  CHSC78408  Oryzopsis exigua Vernon H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 2000-6-18 9929 Lassen East-northeast of the lookout on Observation Peak located east of Ravendale. 2377 Comment
  JEPS98391  Oryzopsis exigua Vernon H. Oswald, G. Schoolcraft, M. Dolan, and B. Corbin 2000-6-18 9929 Lassen E of Ravendale (E-NE of the lookout on Observation Peak) 2377 Comment
  UC768463  Oxytheca dendroidea subsp. dendroidea R. F. Hoover 1940-10-1 4656 Lassen Janesville Comment
  UC769844  Oxytheca dendroidea subsp. dendroidea R. F. Hoover 1940-10-5 4676 Lassen pass between Shaffer Mt. and Warren Peak Comment
  HSC69079  Packera cana Gary Schoolcraft 1979-7-11 143 Lassen S-face of Observation Peak 2317 Comment
  CHSC118854  Packera multilobata L. mP. Janeway; B. Castro 2015-6-5 11774 Lassen Great Basin, Modoc Plateau. Along Tuledad Road (County Road 506) 4.7 road-km south of the junction at the west end ofTuledad Canyon; 2.6 air-km east-northeast of Dodge Reservoir. 1846 Comment
  CHSC75465  Packera multilobata Vernon H. Oswald; Lowell Ahart 1999-6-9 9734 Lassen Hwy. 395 northeast of Susanville and north of Smoke Creek Ranch Rd. at Mud Flat. On the bank between the highway and the playa. 1348 Comment
  CAS-BOT-BC317057  Packera multilobata Louella Bass 1982-5-30 s.n. Lassen Hillside near Biscar dam, Karlo Road northeast of Susanville 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
  CAS-BOT-BC10429  Paeonia brownii J. T. Howell 1934-6-14 12146 Lassen Near Lost Lake, Warner Mountains 2438 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
  SEINET4691127  Panicum capillare A. Tiehm 1980-1 5759 Lassen Amedee Hot Springs, north end of Honey Lake Valley, 4 air miles SE of Wendel 1220 Comment
  UCD89807  Panicum capillare subsp. hillmanii John Thomas Howell 1973-7-10 49808 Lassen Doyle. Comment
  CAS-BOT-BC259609  Pascopyrum smithii G. Schoolcraft 1998-7-14 2760 Lassen On flat NE of Shaffer Mountain 1356 Comment
  RSA647577  Pascopyrum smithii Marion P. Harthill 1972-6-16 780 Lassen Doyle 1372 Comment
  JEPS79152  Pedicularis attollens L. R. Heckard with R. Bacigalupi 1980-6-12 5259 Lassen just ne of Westwood (near golf course) 1554 Comment
  UC773852  Pedicularis semibarbata L. R. Short, J. Warren 1936-6-9 S 410 Lassen Burgess Spring Experiment Range Lassen National Forest 1859 Comment
  JEPS11489  Penstemon cinicola Jos. Grinnell 1928-6-26 Lassen Butte Lake 1889 Comment
  JEPS8094  Penstemon davidsonii var. davidsonii W. L. Jepson 1910-6-11 4117 Lassen Cinder Cone 2133 Comment
  SBBG66504  Penstemon deustus S. W. Hutchinson -Jun-1925 1075 Lassen Eagle Lake 1554 Comment
  CHSC4272  Penstemon deustus var. pedicellatus K. R. Stern 1967-6-24 2426 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  JEPS29103  Penstemon deustus var. pedicellatus Lauramay T. Dempster 1961-6-17 1679 Lassen Highway 395 just w Tule Mt.; just w of Tule Mt. 1645 Comment
  CHSC43486  Penstemon gracilentus Lowell Ahart 1974-7-9 524 Lassen Along the edge of Eagle Lake Road, about 5 miles west of Susanville. 1584 Comment
  CHSC5912  Penstemon gracilentus R. Gein 1946-6-24 Lassen McCoy Flat. Eagle Lake. 1645 Comment
  CHSC68880  Penstemon gracilentus Vernon Oswald; Lowell Ahart 1997-6-24 8589 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). 1685 Comment
  UC1585967  Penstemon gracilentus Barbara Ertter 1988-7-25 7866 Lassen ca 10 air mi due s Susanville (ridge of Diamond Mts., ca 1.5 mi e of Diamond Peak, n face); ridge of Diamond Mts., e of Diamond Peak 2255 Comment
  UCD124179  Penstemon gracilentus K. M. Meyer; A. Townesmith 2007-7-23 157 Lassen Lassen National Forest. 3.9 miles southwest on 32N10 off Hwy 44. (Turn at rest area). 503 Comment
  SEINET5329197 Image available Penstemon heterophyllus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  POM252804  Penstemon neotericus A. A. Heller 1938-7-28 15294 Lassen West of Westwood. Comment
  POM252805  Penstemon neotericus A. A. Heller 1938-6-22 15181 Lassen 1 mile S of Westwood. Comment
  SEINET11262098  Penstemon neotericus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3937 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
  UC423645  Penstemon neotericus David D. Keck 1930-7-23 957 Lassen two mi e Westwood; Sierra Nevada, e of Westwood 1493 Comment
  CAS-BOT-BC239220  Penstemon newberryi var. berryi Hans Leschke 1957-7-12 s.n. Lassen Lassen Volcanic National Park, above Cold Boiling Lake 2377 Comment
  CHSC36470  Penstemon roezlii Jeffrey R. Peek 1982-6-4 31 Lassen Ca. .5 mi e of Murrers Upper Meadow on road going to meadow. Comment
  CHSC5913  Penstemon roezlii R. Gein 1946-6-26 Lassen Eagle Lake. Pine Creek bridge. 1584 Comment
  UC887288  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  RSA299199  Penstemon roezlii J. T. Howell, Gordon H. True, Wayne Dakan 1974-7-30 50689 Lassen South and southeast of Diamond Mtn. 2226 Comment
  SEINET226061  Penstemon roezlii M. Lavin 1982-5-30 4122 Lassen E of Hallelujah Junction 22 air mi NW of Reno W side of Petersen Mtns 1676 Comment
  CAS-BOT-BC239494  Penstemon rydbergii var. oreocharis Lassen 1927 G. S. Crew 1927-7-1 49 Lassen Lassen National Forest, Bogard R.S. pasture 1712 Comment
  CAS-BOT-BC239500  Penstemon rydbergii var. oreocharis John Thomas Howell 1934-7-7 12460 Lassen Board Ranger Station Comment
  CHSC107320  Penstemon rydbergii var. oreocharis Lowell Ahart; John Dittes 2011-6-20 17502 Lassen Meadow, about 40 yards west of the stream, about 50 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CHSC12483  Penstemon rydbergii var. oreocharis Carol Weld 1969-6-20 15 Lassen Dean's Meadow. 1950 Comment
  CHSC30583  Penstemon rydbergii var. oreocharis Leonard Walk 1972-6-29 48 Lassen Dean's Meadow on S. side of pond. 1981 Comment
  CHSC4791  Penstemon rydbergii var. oreocharis R. Carter 1967-7-7 582 Lassen Collected at W end of reservoir. Deans Meadow, 6.3 mi S of Eagle Lake Biology Station. 1828 Comment
  CHSC99300  Penstemon rydbergii var. oreocharis Lowell Ahart; John Dittes 2008-6-20 14919 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS11488  Penstemon rydbergii var. oreocharis Dr. R. H. Longbridge 1912-1 Lassen Madeline Plains Comment
  RSA0059628  Penstemon rydbergii var. oreocharis Lowell Ahart, John Dittes 2011-6-20 17502 Lassen About 40 yards west of the stream, about 50 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  SBBG66488  Penstemon rydbergii var. oreocharis S. W. Hutchinson -Jun-1925 1088 Lassen Eagle Lake 1554 Comment
  SBBG7130  Penstemon rydbergii var. oreocharis H. and M. Dearing 1938-7-1 2239 c Lassen 12 mi W of Susanville Comment
  SJSU7940  Penstemon rydbergii var. oreocharis R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline 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
  CHSC60780  Penstemon speciosus Vernon H. Oswald; Lowell Ahart 1993-6-14 5531 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  CHSC98580  Penstemon speciosus B. Castro; L. P. Janeway 2005-7-10 1495 Lassen Northern High Sierra Nevada. Crest of the Diamond Mtns, overlooking Janesville and Honey Lake, 0.15 mi N of Rd 28N01 and 0.4 mi E of its junction with Janesville Grade (Rd 29N01/Rd 208). Knoll on N side of crest, in soft decomposed granite soil among rounded granite boulders. 1859 Comment
  NY660816  Penstemon speciosus G. Schoolcraft 1990-7-2 2100 Lassen Southwest slopes of Cold Springs Mountain 1890 Comment
  NY661031  Penstemon speciosus J. T. Howell 1934-6-19 11882 Lassen 12 miles north of Susanville on road to Horse Lake Comment
  UC1527430  Penstemon speciosus Gordon H. True Jr. 1936-6-25 529 Lassen e Harvey Ranger Station (Harvey Valley); , e of Harvey Ranger Station 1767 Comment
  NY661042  Penstemon speciosus P. A. Munz 1947-5-19 11877 Lassen Highway 395, 3.5 miles south of Ravendale 1615.4 Comment
  NY660819  Penstemon speciosus subsp. speciosus F. D. Payne 1929-7-12 86 Lassen Ridge above Lost Lake, southern end of the Warner Range. 2286.0 Comment
  CAS-BOT-BC243408  Penstemon sudans David D. Keck 1930-7-23 953 Lassen Four miles west of Susanville, Sierra Nevada 1463 Comment
  CHSC114420  Penstemon sudans Loren Gehrung 2005-7-7 Lassen North side of Highway 36 near Devils Corral at Hidden Valley, about six miles west of Susanville, California. 1432 Comment
  CHSC13647  Penstemon sudans M. S. Taylor 1974-7-13 310 Lassen Ca 15 ft w of Mohagany Lake, ca. 3 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  NY661797  Penstemon sudans G. W. Gillett 1953-7-13 274 Lassen Fredonyer Pass, Highway 36. One mile east of pass. 1706.9 Comment
  NY661807  Penstemon sudans B. J. Ertter 1987-6-16 7178 Lassen Skeedaddle Mountains on northeast side of Honey Lake, ca. 1 mile west of Hot Springs VABM 1828.8 Comment
  RSA0006234  Penstemon sudans Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  SEINET5323639 Image available Penstemon sudans J. T. Howell, Gordon H. True 1973-8-1 50153 Lassen Gold Run Creek road south of Susanville, Diamond Range. 1585 Comment
  RSA519197  Penstemon venustus Karl Vincent 1987-8-5 4500 Lassen Sierra Nevada, SE side of Fredonyer Butte; about 30 plants, some up to 40 inflorescences, on steep gravelly roadbank along N side of Ca 36 ca. 11.5 mi WSW of Susanville, E of Fredonyer Pass 1585 Comment
  SEINET12335380  Penstemon venustus K. A. Vincent 1987-1 4500 Lassen Sierra Nevada, SE side of Fredonyer Butte, N side of CA 36 ca 11.5 mi WSW of Susanville 1585 Comment
  CHSC29907  Perideridia bolanderi Robin Ondricek; Wesley Dempsey 1978-6-7 43 Lassen Ridge E of Lower Dry Lake, 12.5 mi N of Susanville. 1706 Comment
  NY1102214  Perideridia bolanderi subsp. bolanderi G. Schoolcraft 1989-5-31 1889 Lassen Skedaddle Ranch Rd. about 6 miles north of Wendel Road 1494 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
  HSC73083  Perideridia gairdneri subsp. gairdneri Cindy Prouty 1978-7-11 19 Lassen Papoose Creek, S of Gallatin 1585 Comment
  CHSC29870  Perideridia oregana Robin L. Ondricek 1978-7-15 103 Lassen .6 mi e of jct. with main road to ELFS on road to Murrers Upper Meadow. 1554 Comment
  CAS-BOT-BC423341  Peritoma platycarpa H. D. Ripley; R. C. Barneby 1943-6-15 5757 Lassen Nr. Viewland 1310 Comment
  CAS-BOT-BC419144  Persicaria maculosa Luella Bass 1980-8-29 s.n. Lassen Standish Comment
  JEPS17742  Phacelia adenophora Rimo Bacigalupi with G. T. Robbins 1955-7-21 5419 Lassen along Smoke Creek Ranch rd 6.8 mi e jnct. with U.S. 395 1402 Comment
  RSA293371  Phacelia adenophora Reino Alava 1957-7-5 1136 Lassen 4.8 miles south of Ravendale on Highway 395. Comment
  SJSU14070  Phacelia adenophora W. Savage 1964-6-30 337 Lassen by Hwy 89, 11 mi N of Susanville Comment
  RSA83071  Phacelia adenophora Verne Grant, Alva Grant 1947-8-1 8225 Lassen On dike of irrigation ditch southwest of Madeline. Comment
  UCR244050  Phacelia bicolor var. bicolor Jim Andre 1993-6-1 19720 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  JEPS87427  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  CHSC23597  Phacelia heterophylla subsp. virgata W. O. Baum 1971-7-1 71 -24 Lassen S. slope of Gallatin Peak. 2011 Comment
  CHSC93673  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11983 Lassen North side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1410 Comment
  RSA715987  Phacelia heterophylla subsp. virgata L. Ahart, John Dittes 2005-6-2 11952 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4.75 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction 1513 Comment
  JEPS2126  Phacelia humilis C. S. Robinson 1927-6-25 Lassen near Westwood Jct. (sw Lassen Co.); Lassen N. F., Norval Flat 1747 Comment
  UC1069416  Phacelia humilis A. Simontacchi 1940-5-17 751 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quadrangle 1699 Comment
  UC133087  Phacelia humilis T. S. Brandegee 1892-7-3 Lassen Susanville Comment
  UC699731  Phacelia humilis Farris Farris 1936-6-5 Lassen Diamond Mountain 1828 Comment
  UC773945  Phacelia humilis L. R. Short 1936-5-22 S- 351 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1836 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
  UCD120534  Phacelia humilis var. humilis Jack Major 1966-6-24 s.n. Lassen Above Blue Lake, Warner Mountains, Modoc National Forest, northeastern part of county (ca. 18 miles airline southeast of Likely). 1905 Comment
  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
  CHSC80208  Phacelia linearis Jeanne Boze 1981-6-13 117 Lassen On northeast slope of Gallatin Peak. 1981 Comment
  CHSC93235  Phacelia linearis John Dittes; Scott Chamberlain 2004-6-28 1009 Lassen Modoc Plateau; Long Valley; ca. 1.8 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 1.0 air-mile east of Plumas County line. 1460 Comment
  HSC82245  Phacelia linearis Thomas W. Nelson, Jane P. Nelson 1980-7-6 5987 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS2134  Phacelia linearis J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen near Chat; Honey Lake Valley Comment
  UC699732  Phacelia linearis Farris Farris 1936-6-5 Lassen Susanville 1371 Comment
  UCR80208  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 mi. south of Ravendale. 1638 Comment
  SEINET5519037  Phacelia linearis J. Young 1982-6-9 s.n. Lassen Adin, M. Meyer's Ranch 1372 Comment
  RSA128305  Phacelia lutea Peter H. Raven, Otto T. Solbrig 1958-6-17 13281 Lassen Along US Highway 395, 5.7 miles south of Ravendale. Comment
  RSA647570  Phacelia lutea Marion P. Harthill 1972-6-17 818 Lassen Ravendale. 1768 Comment
  NY1056433  Phacelia lutea var. glandulifera A. Tiehm 1988-6-2 11701 Lassen South side of Shaffer Mountain, 3.4 road miles north of the Wendel road on highway 395 from Susanville to Alturas, west of the highway 1387 Comment
  SEINET5518985  Phacelia lutea var. lutea M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-12 86- 21 -1 Lassen Smoke Creek Road, east of HWY 395 1448 Comment
  UC506976  Phacelia mutabilis George A. Fischer, Irwin H. Johnson 1933-7-12 F 226 Lassen Lassen <National> Forest 1722 Comment
  UC107339  Phacelia ramosissima var. eremophila T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  SEINET3091880 Image available Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young. 1984-6-7 8595 Lassen Flats on the Northwest side of Shaffer Mountain, 9 air miles North-northwest of Litchfield. 1372 Comment
  SJSU14072  Phacelia thermalis W. Savage 1964-6-30 338 Lassen by Hwy 338, 11 mi N of Susanville Comment
  CAS-BOT-BC265821  Phalaris arundinacea John Thomas Howell 1975-7-23 51402 Lassen Susanville, Sierra Nevada 1295 Comment
  UCD88537  Phalaris arundinacea R. Tofsrud 1947-7-20 257 Lassen Near Pittville. Comment
  UC60737  Phleum alpinum M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CHSC4271  Phlox diffusa K. R. Stern 1967-6-25 2430 Lassen On road to Eagle Lake Biological Station, ca. 3 mi. E of Eagle Lake. 1676 Comment
  CHSC6211  Phlox diffusa J. B. Fredonyer 1946-6-17 Lassen Mt. Fredonyer. 2133 Comment
  UC1609186  Phlox diffusa Vernon H. Oswald and Lowell Ahart 1993-5-12 5372 Lassen 0.9 mi nw Hwy. 44 intersection with A21 (to Westwood) (sw side of Hwy 44) 1737 Comment
  UC773891  Phlox gracilis L. R. Short and Wm. Gansberg 1936-6-2 S- 363 Lassen Burgess Spring Experimental Range Lassen Forest 1859 Comment
  RSA304681  Phlox hoodii var. canescens Jim Shevock 1971-4-9 944 Lassen Hwy 299, E of Dana. 1067 Comment
  CHSC4772  Phlox speciosa R. Carter 1967-6-27 563 Lassen Ca. 5 yds. off N side of Rd. Comment
  CHSC1306  Phlox speciosa subsp. occidentalis M. Anthony 1953-4-27 Lassen Susanville. 1280 Comment
  CHSC91202  Phlox speciosa subsp. occidentalis Lowell Ahart; John Dittes 2005-6-2 11928 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  UC52648  Phlox speciosa subsp. occidentalis M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixie Mts. Comment
  RSA551342  Phlox speciosa subsp. occidentalis J. T. Howell, Gordon H. True, Margaret Williams 1973-5-12 49155 Lassen In cemetary, Janesville 1296 Comment
  CHSC71130  Phlox stansburyi Vernon H. Oswald; Lowell Ahart 1998-5-22 9114 Lassen Road to ORV parking area in Fort Sage Mtns. 0.6 mi east of Fort Sage Rd., ca 5 mi NNE of Doyle. 1402 Comment
  CHSC48338  Phoenicaulis cheiranthoides Vernon Oswald 1986-5-28 2061 Lassen Hwy 139 between Eagle Lake and Adin, 38.1 mi n of Susanville. 1645 Comment
  CHSC7709  Phoenicaulis cheiranthoides Beverley J. Wise 1969-3-4 34 Lassen 1.5 mi. north of Susanville on Hwy 139. 50 feet w of rd. 1341 Comment
  UC1136913  Phoenicaulis cheiranthoides L. R. Short 1936-4-28 S 335 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1737 Comment
  UC1609187  Phoenicaulis cheiranthoides Vernon H. Oswald and Lowell Ahart 1993-5-12 5386 Lassen 1.6 mi se of Pittsville Road (Hwy 44 between Poison Lake and A21 (to Westwood) on n side of road) 1719 Comment
  CDA19731  Phyllodoce breweri J. Chattin August 1947 s.n. Lassen Northern California; Silver Lake. 0 Comment
  SEINET10530755  Pinus jeffreyi Katherine L. Morris 1973-5-25 Morris 219 Lassen Collected 2.6 mi W of Susanville, on US 36, in an area of Pinus jeffreyi and Purshia. Comment
  NY951542  Pinus ponderosa var. ponderosa D. H. Goldman 2004-11-6 2941 Lassen Along the N side of Forest Road 32N08, just N of Pine Creel Valley and about 1.8 miles E of the intersection with Rt. 44. Crater Lake Mountain, Lassen National Forest 1725 Comment
  CDA601  Pinus washoensis Gordon Leppig, Sylvia Leppig and Juli & Kai Neander 1998-8-18 1065 Lassen Modoc National Forest, Blue Lake Campground Comment
  UCR201593  Plagiobothrys Ken Osborne 2005-4-23 s.n. Lassen 3 miles SE of Honey Lake, 0.5 mile west of Turtle Mountain 1276 Comment
  RSA0011556  Plagiobothrys R. F. Thorne, Larry E. DeBuhr 1975-8-22 46996 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CHSC58837  Plagiobothrys cusickii Vernon H. Oswald; Lowell Ahart 1992-7-16 5113 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. 1691 Comment
  JEPS107810  Plagiobothrys cusickii Lowell Ahart, John Dittes 2005-6-2 11954 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  CAS-BOT-BC224969  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  UC614658  Plagiobothrys leptocladus L. Constance 1938-6-11 2330 Lassen slightly alkaline overflow of the Susan River at Litchfield; Susan River, Litchfield 1219 Comment
  CAS-BOT-BC228466  Plagiobothrys mollis Clarence R. Quick 1962-6-17 62 25 B Lassen Swains Hole, S of Blacks Mountain Experimental Station 1554 Comment
  RSA128304  Plagiobothrys mollis P. H. Raven, Otto T. Solbrig 1958-6-17 13258 Lassen Along U.S. Hwy 395, 7.1 miles W of Standish. Comment
  UC708090  Plagiobothrys reticulatus McKee and Westover 1918-6-13 12 Lassen Susanville 1280 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
  CHSC117287  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2016-7-15 21217 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1261 Comment
  HSC95289  Platanthera dilatata var. leucostachys Gordon Leppig, J. Cromwell 1997-7-26 602 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC30564  Platanthera leucostachys Sori H. Shad 1970-6-19 21 Lassen Above and east of Galatin Beach. 1524 Comment
  CHSC4752  Platanthera leucostachys R. Carter 1967-7-14 609 Lassen Ca. 2 mi E of Silver Lake along N side of Rd. (31N07). 1828 Comment
  UC726205  Platanthera leucostachys A. A. Heller 1938-7-28 15298 Lassen 2 mi e Westwood 1524 Comment
  SEINET10464991  Plectritis congesta subsp. brachystemon Mary Susan Taylor 1982-5-7 Taylor 4426 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
  CHSC50824  Pleiacanthus spinosus Vernon Oswald; Lowell Ahart 1990-7-25 4395 Lassen Intersection of Hwy 70 and Scott Rd, 2.2 mi west of Hwy 395. Roadside bank. 1463 Comment
  HSC79990  Pleiacanthus spinosus William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UCD143647  Poa George A. Fischer; Irwin H. Johnson 1933-7-14 F 245 Lassen Lassen Nat'l Forest; Patterson Flat. 1737 Comment
  JEPS114748  Poa bulbosa Lowell Ahart, John Dittes 2008-6-22 15035 Lassen About 220 yards west of the road levee, on the banks of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber 1262 Comment
  RSA450966  Poa bulbosa Barbara Shervanick 1974-5-7 1265 Lassen Highway 396, just south of Milford; Cascade Mountain Range 1372 Comment
  UCD90605  Poa bulbosa Alan A. Beetle; G. L. Stebbins Jr. 1942-5-29 3364 Lassen at Nubieber, near dwellings. Comment
  RSA716274  Poa cusickii L. Ahart, John Dittes 2005-6-2 11927 Lassen about 1.4 miles 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. 1499 Comment
  UCD90891  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen northeastern part of county. Long Valley, 6 miles southeast of Jess Valley, southern Warner Mountains. 2133 Comment
  UC1024837  Poa cusickii subsp. cusickii Leo Whitney 1935-6-10 3219 Lassen Camp 10 Fruit Grower's Supply Company Comment
  UC1024881  Poa cusickii subsp. cusickii Leo Whitney 1935-5-26 3141 Lassen 10 mi e Adin (Ash Creek) Comment
  CDA2366  Poa pratensis A. A. Beetle 1941-6-28 2797 Lassen 10 miles west of Chester. Comment
  SEINET10523355  Poa pratensis Billy Joe Cox 1971-6-11 Cox 3188 Lassen 1 mi W of Westwood, on CA Hwy 36; scattered Pinus ponderosa, Pseudotsuga menziesii, Arctostaphylos, and Ceanothus all volcanic soils, rather flat & arid. Comment
  UC1024829  Poa pratensis subsp. pratensis Leo Whitney 1935-6-12 3231 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC604682  Poa pratensis subsp. pratensis Farris Farris 1935-6-15 Lassen Susanville 1310 Comment
  CAS-BOT-BC255025  Poa secunda Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16337 Lassen 13.5 miles E of Susanville Comment
  CHSC106673  Poa secunda B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  JEPS126508  Poa secunda Alejandro Brambila, Michael Dolan 2016-7-7 CA 320 -157 Lassen Ash Valley road 1 mi past Holbrook Reservoir. Comment
  SD34480  Poa secunda A. A. Beetle 1941-6-28 2797 Lassen 10 miles west of Chester, mountain meadow 1524 Comment
  SEINET175674 Image available Poa secunda Marcus E. Jones 1897-6-19 Lassen Chat, California 1524 Comment
  UCD90454  Poa secunda L. Whitney 1933-8-1 s.n. Lassen Harvey Mountain. 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-BC236255  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5447 Lassen 2 miles E of Westwood, in meadow leading down to Mountain Meadows Reservoir 1524 Comment
  UC1024949  Poa secunda subsp. juncifolia Leo Whitney 1935-6-27 3317 Lassen ca 13 mi w of n end Eagle Lake; Squaw Valley Comment
  UC589951  Poa secunda subsp. juncifolia Leo Whitney 1935-6-27 3317 Lassen Squaw Valley Comment
  UCD32654  Poa secunda subsp. juncifolia Beecher Crampton 1954-7-5 2048 Lassen 4.5 miles W of Susanville, along Hwy 36. 1432 Comment
  UCD32661  Poa secunda subsp. juncifolia Beecher Crampton 1954-7-5 2057 Lassen 4.5 miles W of Susanville, along Hwy 36. 1432 Comment
  UCD92148  Poa secunda subsp. juncifolia Collector Unknown 1935-6-27 s.n. Lassen Squaw Valley. 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
  UCD92393  Poa secunda subsp. juncifolia C. C. Rowland 1944-7-11 s.n. Lassen Doyle. Comment
  UCD92428  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-26 3370 Lassen Lassen National Forest. Near Fruit Grower's Supply Co., Camp 10. Comment
  SEINET7294025 Image available Poa secunda subsp. juncifolia Leo Whitney 1935-1 3259 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  CAS-BOT-BC236180  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49197 Lassen Elysian Valley NW of Janesville 1325 Comment
  UC1024681  Poa secunda subsp. secunda Leo Whitney 1934-7-10 2165 Lassen ca 14 mi w Eagle Lake (near Harvey Spring); Lassen Nat'l Forest, Harvey Valley 1737 Comment
  UC1024818  Poa secunda subsp. secunda Leo Whitney 1935-6-19 3261 a Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024836  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3220 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024838  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3218 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1024839  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3217 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1142953  Poa secunda subsp. secunda A. L. Hormay 1941-6-26 37 Lassen Bogard Ranger Station, Pine Creek Bogard Ranger Station; Lassen Nat'l Forest 1706 Comment
  UC127313  Poa secunda subsp. secunda Milo S. Baker Lassen Dixie Valley Comment
  UC506999  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 F 206 Lassen Grass Valley; Lassen Nat'l Forest 1699 Comment
  UCD92016  Poa secunda subsp. secunda A. H. Shunk 1923-1 14 Lassen Hayden Hill. Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  UCD91755  Poa wheeleri Leo Whitney 1935-6-13 3240 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  CAS-BOT-BC244277  Podagrostis humilis John Thomas Howell; Gordon H. True 1973-8-1 50229 Lassen E slope of Diamond Range S of Susanville 2133 Comment
  HSC95275  Polemonium occidentale Gordon Leppig 1998-7-12 949 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SDSU3228  Polemonium occidentale D. F. Howe 1964-8-2 3918 Lassen East Creek, Warner Mtns., Modoc National Forest 2012 Comment
  UC23986  Polemonium occidentale subsp. occidentale M. S. Baker and Frank Nutting 1894-7-31 Lassen Bridge Creek Comment
  CAS-BOT-BC74168  Polyctenium fremontii James Jokerst 1983-5-31 1786 Lassen Grasshopper Valley. 1583 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
  SEINET258241 Image available Polyctenium fremontii var. confertum Arnold Tiehm, Jan Nachlinger, Margaret Williams 1988-6-2 11703 Lassen 6.6 road miles north of the Wendel Road on Hwy. 295 from Susanville to Alturas. T30N R15E Sec 15 1350 Comment
  SEINET5326411  Polyctenium williamsiae G. Schoolcraft 1998-5-19 2707 Lassen S. end Mud Flat. 1341 Comment
  RSA0004886  Polygala lasseniana A. A. Heller 1938-6-23 15213 Lassen South of Secret Valley. Comment
  UCD109689  Polygala subspinosa T. Wendt; E. Lott 1975-6-12 1031 Lassen 4.5 mi. E of Rte 395 on Smoke Creek Ranch Road, E. of Mud Flat. 1371 Comment
  JEPS50529  Polygonum amphibium var. emersum W. L. Jepson 7997 a Lassen Grasshopper Valley 1615 Comment
  NY652201  Polygonum amphibium var. stipulaceum G. Schoolcraft 1996-9-12 2571 Lassen In Willow Creek north of Susanville 1493.5 Comment
  HSC63947  Polygonum argyrocoleon Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 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-BC414489  Polygonum douglasii Clare B. Hardham 1969-8-28 17432 A Lassen West of Janesville Comment
  UC1567352  Polygonum douglasii subsp. austiniae G. Schoolcraft 1989-7-3 1946 Lassen Diamond Peak Diamond Mtsn. 2346 Comment
  CHSC66255  Polygonum douglasii subsp. johnstonii Vernon H. Oswald; Lowell Ahart 1996-6-24 7864 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Locally common in open woods on the W side of the meadow ca. 0.4 mi S of the cabins. 1633 Comment
  JEPS117589  Polygonum douglasii subsp. spergulariiforme 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1521 Comment
  JEPS51271  Polygonum douglasii subsp. spergulariiforme Brown and Wieslander 1922-7-20 88 Lassen Martin Sprs. Eagle Lake Comment
  RSA122844  Polygonum kelloggii L. R. Short, Wm. Gansberg 1936-6-8 s 390 Lassen Burgess Spring, Exp Range. 1744 Comment
  JEPS28705  Polygonum minimum George W. Gillett 1957-7-28 931 Lassen draw 1 mi above Butte Lake (on Widow Lake Trail); Lassen Volcanic National Park 1905 Comment
  UC1603209  Polygonum polygaloides J. Guardino 1993-6-9 281 B Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  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-BC419856  Polygonum polygaloides subsp. confertiflorum James Jokerst 1983-7-24 1883 Lassen Near Madeline Plains. 1614 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
  CHSC61055  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald; Lowell Ahart 1993-8-3 5748 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. Locally abundant in small patches of more or less bare ground along the E side of the swamp. 1932 Comment
  JEPS121265  Polygonum polygaloides subsp. confertiflorum Lowell Ahart, John Dittes 2013-7-23 18905 Lassen On the NW 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
  UC1192317  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 757 Lassen marsh on Great Northern Railroad Nubeiber (Hwy 299) Comment
  CHSC4773  Polygonum polygaloides subsp. kelloggii R. Carter 1967-6-27 559 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 Comment
  UC1609434  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
  UC773864  Polygonum polygaloides subsp. kelloggii L. R. Short and Wm. Gansberg 1936-6-8 S- 390 Lassen Burgess Spring Experimental Range Lassen <National> Forest 1743 Comment
  RSA122836  Polygonum sawatchense L. R. Short, J. Warren 1936-06 s 420 Lassen Burgess Spring, Exp Range. 1857 Comment
  RSA122845  Polygonum sawatchense L. R. Short 1936-5-22 6025 Lassen Burgess Spring, Exp Range. 1837 Comment
  UC465764  Polygonum shastense Franklin P. Nutting Lassen Silver Lake Comment
  CAS-BOT-BC420978  Polygonum spergulariiforme Alice Eastwood; John Thomas Howell 1940-6-11 7976 Lassen Big Valley Mts. Comment
  CAS-BOT-BC232546  Polypogon monspeliensis Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16346 Lassen Along margin of drainage gulley below reservoir, N of road 13.5 miles E of Susanville Comment
  RSA715989  Polypogon monspeliensis L. Ahart, John Dittes 2005-6-2 11967 Lassen Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1409 Comment
  CAS-BOT-BC105617  Populus trichocarpa John Thomas Howell; Gordon H. True 1973-8-1 50148 Lassen Gold Run Creek Road south of Susan ville, Diamond Range - Sierra Nevada 1584 Comment
  CHSC13649  Porterella carnosula M. S. Taylor 1974-7-13 308 Lassen Abundant along edge of Mahogany Lake, ca. 3 mi s of Eagle Lake Field Station, ca. 13 mi ne of Susanville. 1524 Comment
  CHSC60343  Porterella carnosula Mary Ann Showers 1992-6-13 2550 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  JEPS23859  Porterella carnosula Peter H. Raven with Otto T. Solbrig 1958-6-17 13294 Lassen along United States Highway 395, 4.8 mi s Madeline Comment
  UC1143018  Porterella carnosula August L. Hormay 1934-5-14 Lassen Little Harvey Valley; Lassen National Forest, Little Harvey Valley 1676 Comment
  CHSC118487  Porterella carnosula Don Lepley 2015-5-29 Lassen Lassen National Forest. Eagle Lake Ranger District. Southeast corner of Pine Creek Valley, about seven air miles east of Bogard Rest Area. 1716 Comment
  SEINET10460828  Porterella carnosula Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 Holmgren 9463 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi.) south of Madeline. T36N R13ES9 1620 Comment
  SEINET10460829  Porterella carnosula Howell 1934-7-7 Howell 12466 Lassen Near Feather Lake Comment
  CHSC4840  Potamogeton filiformis R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  POM118853  Potamogeton foliosus Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC1099866  Potamogeton foliosus Verne Grant, Irving Schneider 1947-7-29 8181 Lassen 1 mi e (upstream) of Tule Lake; Cedar Creek Comment
  SEINET9336258  Potamogeton foliosus Unknown 2007-7-25 Lassen 6 mi S of Bieber in Big Valley. Robin Harbert's wild rice field. Weed. Common name: leafy pondweed. Comment
  RSA323730  Potamogeton pusillus A. Tiehm, Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1699 Comment
  UC1099901  Potamogeton pusillus var. pusillus Verne Grant, Irving Schneider 1947-7-31 8202 Lassen Madeline Plain, ne quarter of George Williams section 19 Madeline Plain Comment
  JEPS88679  Potentilla basaltica Dean Wm. Taylor with Glenn Clifton 1990-6-12 10882 Lassen along Ash Creek at the crossing of Ash Valley Road (Lassen County Road 527, Forest Road 39N08) Modoc Plateau, along Ash Creek, Ash Valley (Ash Valley) 1554 Comment
  UC1598197  Potentilla basaltica G. L. Clifton 1988-7-20 18126 Lassen near Ash Valley; Likely Quad., near Ash Valley 1541 Comment
  CAS-BOT-BC540031  Potentilla biennis Verne Grant; Irving Schneider 1947-7-30 8189 Lassen South point of west embayment, Tule Lake Comment
  UCR7838  Potentilla gracilis Marilyn Malin 1968-6-27 253 Lassen Lassen National Forest. Papoose Valley Meadow [Papoose Meadows, along Papoose Creek south of Eagle Lake, 2 mi south of Gallatin Beach.] 1620 Comment
  CHSC105242  Potentilla gracilis var. fastigiata Lowell Ahart; John Dittes 2010-7-31 16985 Lassen 10 yards northeast of 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
  CHSC93529  Potentilla gracilis var. fastigiata Lowell Ahart; John Dittes 2005-6-1 11854 Lassen Long Valley, on the west side of the poor dirt road, about 1/2 mile west of Scott Road, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  UC1136906  Potentilla gracilis var. fastigiata L. R. Short and W. McNulty 1936-6-17 S- 443 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1767 Comment
  UC1137589  Potentilla gracilis var. fastigiata A. Simontacchi 1940-7-8 939 Lassen 3.9 mi se Blacks Mtn; Lassen National Forest, Halls Flat Quad. Comment
  CAS-BOT-BC540359  Potentilla gracilis var. fastigiata Alice Eastwood 1912-8-22 1870 Lassen Lassen Butte Region: Morgans Springs Comment
  CAS-BOT-BC540364  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  HSC81543  Potentilla gracilis var. flabelliformis Thomas W. Nelson, Jane P. Nelson 1980-7-6 6042 Lassen Along Ash Creek at Ash Creek Campground 1494 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
  CHSC117509  Poteridium annuum Lowell Ahart; John Dittes 2016-7-13 21135 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
  CHSC117197  Poterium sanguisorba Lowell Ahart; John Dittes 2016-6-7 20998 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC30595  Prunella vulgaris Marc Held 1972-7-11 40 Lassen Collected approx. 1 mile north of Gallatin house. Comment
  UC1523752  Prunella vulgaris Gary Schoolcraft 1981-6-25 482 Lassen East Fork of Willard Creek 1584 Comment
  JEPS62498  Prunella vulgaris var. lanceolata Brown and Wieslander 1922-7-30 23 Lassen Martin Sprs Eagle Lake; , Martin Sprs Comment
  CHSC106677  Prunus andersonii Zachary Garcia 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC71098  Prunus andersonii Vernon H. Oswald; Lowell Ahart 1998-5-22 9119 Lassen Road to ORV parking area in Fort Sage Mtns. 1.1 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. 1447 Comment
  SEINET3157217  Prunus andersonii E. K. Balls 1950-5-9 15947 Lassen 6 mi S of Doyle, hwy 395 1372 Comment
  UC1128289  Prunus andersonii E. Sawyer 1935-6-27 227 Lassen Long Valley 1310 Comment
  UC60834  Pseudoroegneria spicata subsp. spicata J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley, Amedee Amedee; Honey Lake Valley, Amedee Comment
  CHSC11770  Pseudostellaria jamesiana Wayne O. Baum 1971-7-6 71 -6 Lassen E. slope of Gallatin Peak. 1950 Comment
  UC1136876  Pseudostellaria jamesiana L. R. Short and Wm. Gansberg 1936-6-16 S- 438 Lassen Burgess Spring Experimental Range; Lassen Forest 1883 Comment
  SJSU10070  Psilocarphus tenellus L. Hooker 1965-7-12 Lassen by Hwy 139 c. 8.3 mi NE of Susanville 1645 Comment
  CDA27774  Psoralidium lanceolatum S. E. Piper 1943-7-2 Lassen 0.5 mile east of Herlong. 0 Comment
  UC1562803  Pterospora andromedea Barbara Ertter 1987-7-25 7319 Lassen Hwy 44 ca 1 mi E of Shasta Co. line 1645 Comment
  JEPS120925  Puccinellia lemmonii Lowell Ahart, John Dittes, Todd Sloat 2013-6-9 18788 Lassen In a depression on the S side of the road, on the S side of the McArthur Diversion Canal, 0.32 miles E of the Tule River, 2.8 air miles NW of McArthur, Fall River Valley, McArthur Swamp. Comment
  CDA32666  Puccinellia lemmonii Gary Schoolcraft 2000-6-19 2906 Lassen Flat southeast of Ravendale BLM Fire Station. 0 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
  JEPS28802  Purshia tridentata var. tridentata George W. Gillett 1957-9-4 1129 Lassen ca 50 yds from Widow Lake (near outlet, near trail); Lassen Volcanic National Park 2057 Comment
  JEPS88575  Purshia tridentata var. tridentata Vernon H. Oswald and Lowell Ahart 1996-6-17 7769 Lassen 7 mi w of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Highway 36, along the trail on n side of Highway 36 0.2 mi e of 7 Mile Post); Modoc Plateau, Bizz Johnson Trail 1432 Comment
  UC1167550  Purshia tridentata var. tridentata E. C. Nord 1958-7-12 108 Lassen near Janesville (near Plumas National Forest) 1371 Comment
  UC1332443  Pyrrocoma carthamoides var. cusickii Ralph K. Gierisch 1968-7-11 3342 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  UCR163275  Pyrrocoma hirta Jim Andre 1993-6-29 1408 Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  UC35838  Pyrrocoma hirta var. lanulosa M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  JEPS109778  Pyrrocoma lucida Dean W. Taylor 2002-8-10 18309 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 Comment
  CAS-BOT-BC94255  Quercus garryana Alice Eastwood; John Thomas Howell 1940-6-11 7966 Lassen Eastern Fall River Valley Comment
  JEPS41362  Quercus garryana James Griffin 1964-8-4 1272 Lassen along county road from Little Valley to Dixie Valley 1341 Comment
  RSA715982  Quercus kelloggii L. Ahart, John Dittes 2005-6-2 11942 Lassen 1.5 miles NE of the Anderson Ranch home, Long Valley, 6 miles (air) N of intersection of Scott Road and Hwy 70, 7.5 miles (air) NW of Hallelujah Jct. 1602 Comment
  UC1192295  Quercus kelloggii Verne Grant and Irving Schneider 1947-9-7 8400 Lassen several mi s Janesville (along Highway 395, w of Honey Lake, and along e foot of Sierras) Comment
  UCD46633  Quercus kelloggii John Thomas Howell; Gordon H. True 1973-5-12 49159 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  JEPS55017  Ranunculus alismifolius var. alismifolius Leland S. Smith 1927-5-25 3 Lassen near Westwood Junction; Lassen Forest, Norval Flat 1747 Comment
  UC1136879  Ranunculus alismifolius var. alismifolius L. R. Short 1936-4-28 S- 339 Lassen Harvey Valley Lassen National Forest 1706 Comment
  UC1608998  Ranunculus alismifolius var. alismifolius Vernon H. Oswald and Lowell Ahart 1993-6-3 5470 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy 44 (between Poison Lake and Susanville) 1749 Comment
  UC1609182  Ranunculus alismifolius var. alismifolius Vernon H. Oswald and Lowell Ahart 1993-5-12 5380 Lassen canal crossing Hwy 44 3.5 mi nw A21 (to Westwood) (n side of road and e side of canal) 1729 Comment
  UC773871  Ranunculus alismifolius var. alismifolius L. R. Short 1936-4-28 S- 339 Lassen Harvey Valley Lassen <National> Forest 1706 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
  NY493018  Ranunculus aquatilis var. diffusus P. H. Raven 1958-6-19 13256 Lassen In a pond along United States Highway 395, 7.1 miles west of Standish Comment
  NY494380  Ranunculus cymbalaria M. A. Nobs 1949-8-20 1484 Lassen Marshy banks of Long Creek, 1 mile north of Doyle, Honey Lake Valley Comment
  CHSC13944  Ranunculus cymbalaria var. saximontanus M. S. Taylor 1974-6-27 268 Lassen Around marsh, ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC1479  Ranunculus cymbalaria var. saximontanus 1944-6-21 Lassen Eagle Lake shore. 1524 Comment
  UC1745660  Ranunculus cymbalaria var. saximontanus Annetta M. Carter 1945-9-30 1723 Lassen Sam Webb place near end of Eagle Lake; ; Sam Webb place near end of Eagle Lake. 1554 Comment
  RSA523410  Ranunculus cymbalaria var. saximontanus Rodney H. True 1936-6-26 544 Lassen Honey Lake Valley- Willow Creek Valley Road. 1524 Comment
  UC1537331  Ranunculus cymbalaria var. saximontanus Gordon H. True Jr. 1936-6-26 544 Lassen Honey Lake Valley-Willow Creek Valley Road 1524 Comment
  CHSC60391  Ranunculus flammula var. ovalis Mary Ann Showers 1992-6-13 2549 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  CHSC55400  Ranunculus glaberrimus Charlie Crannell 1991-4-21 16 Lassen South end of Lassen County youth camp property bordering Eagle Lake Field Station; 200 ft from Eagle Lake. 1560 Comment
  CHSC25560  Ranunculus glaberrimus var. ellipticus Robert A. Schlising 1977-4-2 3185 Lassen Along dirt road, east of Eagle Lake Field Station. 1584 Comment
  CHSC7184  Ranunculus glaberrimus var. ellipticus Lynn R. Thomas 1969-4-17 100 Lassen Ca. 100 yds. w of Rice Canyon Rd., down hillside and just across small creek; 5 mi n of junction with 'Back road to Litchfield;' ca. 12 mi e of Susanville. 1310 Comment
  UC1951076  Ranunculus glaberrimus var. glaberrimus Debra Valov 2009-4-25 2009015 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC117275  Ranunculus macounii Lowell Ahart; John Dittes 2016-7-15 21219 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
  NY494767  Ranunculus occidentalis var. dissectus H. D. D. Ripley 1943-6-13 5682 Lassen Near Milford 1264.9 Comment
  JEPS55022  Ranunculus orthorhynchus var. orthorhynchus Brown and Wieslander 1922-7-30 13 Lassen Martin Sprs. Eagle Lake Comment
  CHSC71097  Ranunculus testiculatus Vernon H. Oswald; Lowell Ahart 1998-5-22 9101 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
  JEPS94541  Ranunculus uncinatus Vernon Oswald and Lowell Ahart 1997-6-24 8613 Lassen 0.7 mi e of boundary of Lassen National Forest (s of Susanville on n side of Diamond Mountain, along Forest Road 29N43, 5.4 mi e of Gold Run Road (29N10)); Diamond Mountain, Forest Road 29N43 1889 Comment
  CHSC23566  Ribes cereum W. O. Baum 1971-6-28 40 Lassen E slope of Gallatin Peak at edge of fire trail. 1920 Comment
  UC773884  Ribes cereum L. R. Short and Wm. Gansberg 1936-6-16 S- 439 Lassen Burgess Spring Experiment Range Lassen Forest 1880 Comment
  CHSC86948  Ribes cereum var. cereum L. P. Janeway 2001-6-19 7188 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
  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
  UC921832  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 mi e Fredonyer Pass 1706 Comment
  CAS-BOT-BC186151  Ribes roezlii var. roezlii Brighton C. Cain 1925-8-24 96 Lassen Mt. Lassen Volcanic National Park 1 mi. below Drakesbad 1645 Comment
  HSC20364  Ribes velutinum L. H. Myers 1963-4-6 37 Lassen 1.0 mi. S of Janesville 1280 Comment
  CHSC23568  Ribes viscosissimum W. O. Baum 1971-6-21 32 Lassen E slope on fire trail on Gallatin Peak. 1920 Comment
  UC485203  Rigiopappus leptocladus Franklin P. Nutting Lassen Dixie Valley Comment
  CAS-BOT-BC74531  Rorippa curvisiliqua John Thomas Howell; Gordon H. True 1973-8-1 50243 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. 2133 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
  CHSC71385  Rorippa curvisiliqua var. orientalis V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9260 Lassen Moll Reservoir in Ash Valley southeast of Adin. Along the edge of the reservoir. 1615 Comment
  CHSC36472  Rorippa nasturtium-aquaticum Jeffrey R. Peek 1982-6-4 33 Lassen Ca. 50 yds along Willow Creek from its beginning in Murrers Upper Meadow. Comment
  SEINET10448590  Rorippa obtusa Mary Susan Taylor 1974-7-8 Taylor 265 Lassen Ca. 1 mi N of Honey Lake, ca. 1 mi S of Standish, Honey Lake Wildlife Refuge. Comment
  NY182185  Rorippa sinuata G. Schoolcraft 1983-6-28 1025 Lassen 1341.1 Comment
  RSA702446  Rosa californica L. P. Janeway 2004-6-26 8171 Lassen High Cascade Range. Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat. Black Mountains Experimental Forest. 1790 Comment
  UC1137304  Rosa woodsii var. ultramontana L. R. Short and Wm. Gansberg 1936-7-9 S- 484 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1795 Comment
  UC773922  Rosa woodsii var. ultramontana L. R. Short and Wm. Gansberg 1936-7-9 S- 484 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1795 Comment
  CHSC23481  Rubus leucodermis Wayne O. Baum 1971-7-5 71 -84 Lassen E. slope of Gallatin Peak. 2072 Comment
  SEINET10479394  Rumex acetosella Jeffrey Huber 1971-6-11 Huber 319 Lassen 3 mi E of Westwood, on CA Hwy 36; in volcanic soils (basalt), in Pinus jeffreyi. 1608 Comment
  JEPS121297  Rumex crispus Lowell Ahart 2013-7-22 18865 Lassen 30 yards S of a man-made pond, about 120 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1191289  Rumex crispus Malcolm A. Nobs and S. Galen Smith 1949-8-20 1481 Lassen 1 mi n Doyle; Long Creek Comment
  UC748311  Rumex crispus Annie M. Alexander and Louise Kellogg 1946-8-11 5151 Lassen Madeline Comment
  UC1536793  Rumex crispus Gordon H. True Jr. 1939-7-6 1037 Lassen George Bailey Ranch Honey Lake Valley Comment
  JEPS121295  Rumex fueginus Lowell Ahart 2013-7-22 18849 Lassen W margin of duck field, about 30 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CAS-BOT-BC433632  Rumex lacustris Peter H. Raven; Otto T. Solbrig 1958-6-17 13266 Lassen Along United States Highway 395, 11.8 miles north-east of Litchfield Comment
  UCD101331  Rumex lacustris Robbins; Raynor 1943-6-1 s.n. Lassen Madeline. Comment
  CDA23194  Rumex salicifolius T. C. Fuller, R. C. Bechtel, R. Bradley 1981-7-9 20384 Lassen West end of the dam of Smoke Creek Reservoir. 0 Comment
  UCR163274  Rumex salicifolius Jim Andre 1993-6-29 1409 Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  CAS-BOT-BC433860  Rumex salicifolius B. Bartholomew; B. Anderson 1988-7-22 4497 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountain. 2080 Comment
  CHSC113068  Rumex salicifolius subsp. triangulivalvis Lowell Ahart; John Dittes 2013-7-22 18867 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
  UC1136137  Rumex salicifolius var. lacustris E. Sawyer 1935-6-27 228 Lassen Long Valley Sierraville Quad. 1310 Comment
  UC6951 Image available Rumex salicifolius var. lacustris M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  CHSC77225  Rumex venosus G. Schoolcraft 1993-6-1 2267 Lassen Along Hwy 395 about 1.5 mi n. of turnoff to Wendel. 1280 Comment
  HSC29859  Rumex venosus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19300 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  SEINET8584738  Rumex venosus W. Harnach 2011-6-4 1247 Lassen NE slope of Turtle Mtn., Fort Sage Mtns., Honey Lake Valley, approx. 7.5 miles NE of Doyle, CA on the Fort Sage Road. 1329 Comment
  UC1776705  Rumex venosus G. Schoolcraft 1993-6-1 2267 Lassen Along Hwy 395 about 1.5 mi. n. of turnoff to Wendel 1280 Comment
  UC568  Sagittaria State Geological Survey 1800-1 2189 Lassen Comment
  CHSC5006  Sagittaria cuneata L. G. Bennett 1968-7-8 124 Lassen Murrers Meadow, north end, near Eagle Lake. 1493 Comment
  UC935793  Sagittaria cuneata Calvin McMillan and Malcolm A. Nobs 1949-6-15 785 Lassen Nubieber Comment
  JEPS124720 Image available Sagittaria cuneata Laurel Loeblich 1964-7-1 73 Lassen Along highway 299 going west .5 miles of junction of A-2 and highway 139. Comment
  CHSC61243  Sagittaria latifolia P. V. Caldwell 1972-6-23 246 Lassen Irrigation ditch at headwaters of Willow Creek, Upper Murer's Meadow. Comment
  UCD149941  Sagittaria latifolia William Anderson 1963-6-21 s.n. Lassen Honey Lake Valley. Comment
  CAS-BOT-BC132697  Salix John Thomas Howell 1976-7-20 52017 Lassen Bottom flats along Willard Creek near its confluene with Susan River, about 5 miles west of Fredonyer Pass 1432 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
  CHSC58514  Salix boothii Vernon H. Oswald 1992-7-3 5048 Lassen Trail from Juniper L. to Snag L., on the W edge of Cameron Meadow. 1950 Comment
  CAS-BOT-BC103456  Salix eastwoodiae G. Schoolcraft 1997-8-6 2666 Lassen Diamond Mtn. 2316 Comment
  CHSC58515  Salix jepsonii Vernon Oswald 1992-7-3 5056 Lassen Grassy Creek between Horseshoe and Snag lakes, ca. 0.3 mi NE of the trail to Cameron Meadow. Lassen Volcanic Park. 1950 Comment
  JEPS107798  Salix jepsonii Lowell Ahart, John Dittes 2005-6-2 11947 Lassen Long Valley, along a small stream, about 1 1/2 miles (air) northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  POM209471  Salix jepsonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 682 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  RSA716142  Salix jepsonii L. Ahart, John Dittes 2005-6-2 11947 Lassen About 1.5 miles NE of the Anderson Ranch home. Long Valley. About 6 (air) miles N of the intersection of Scott Road and Hwy 70. 7.5 (air) miles NW of Hallelujah Jct. 1602 Comment
  JEPS114627  Salix lasiandra subsp. lasiandra Lowell Ahart, John Dittes 2008-6-22 15044 Lassen On the bottom of a deep ditch, on the south side of the road levee, 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
  CAS-BOT-BC128171  Salix lasiandra var. lasiandra John Thomas Howell; Gordon H. True 1973-7-31 50042 Lassen On road from Janesville to Thompson Peak, Diamond Range - Sierra Nevada 1783 Comment
  CAS-BOT-BC106963  Salix lasiolepis G. Schoolcraft 1999-5-7 2819 Lassen Along B.J. Trail near 4 mi. marker w. of Susanville 1371 Comment
  CAS-BOT-BC107368  Salix lasiolepis var. lasiolepis A. G. Brenneis 1928-5-28 2 Lassen Lassen National Forest, 1/2 mi. East of Willow Springs 1371 Comment
  JEPS87437  Salix lemmonii Vernon H. Oswald and Lowell Ahart 1993-6-3 5489 Lassen n. of Hwy. 44 between Poison Lake and Susanville (Bridge Creek Spring Rd. (Lassen 112, Forest 31N06) at Bridge Creek, s. edge of rd.); betw Poison Lake and Susanville, Bridge Creek 1746 Comment
  POM209469  Salix lemmonii Carleton R. Ball 1932-7-24 687 Lassen Mt. Lassen Highway. 0.6 mile N of Sulphur Works Checking Station. Lassen Volcanic National Park. 1982 Comment
  UC1191402  Salsola tragus Verne Grant and Irving Schneider 1947-7-19 8080 Lassen s. of Alutras (in Pit Valley, Williams Ranch, along Southern Pacific right-of-way); Pit Valley, Williams Ranch Comment
Read comments
Jun 24 2009
  CDA34340  Salvia aethiopis Anonymous 1987-6-18 Lassen New Pine Creek, along Hwy 395 north into Oregon. 0 Comment
  CHSC5226  Sambucus melanocarpa A. Santos 1946-6-17 Lassen E side of Eagle Lake. 1615 Comment
  UC1136751  Sambucus mexicana L. R. Short and J. Warren 1936-7-28 S- 490 Lassen Burgess Spring Experiment Range Lassen National Forest 1859 Comment
  POM161480  Sanicula tuberosa Franklin P. Nutting 1894-7-9 s.n. Lassen Pine Creek Comment
  UC1441325  Sanicula tuberosa David H. French 1968-6-2 2880 Lassen about 5 mi e of Westwood (near State Hwy 36) Comment
  CHSC115590  Saponaria officinalis Lowell Ahart; John Dittes 2015-7-14 20323 Lassen About 100 yards west of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1271 Comment
  CAS-BOT-BC110334  Sarcobatus vermiculatus M. S. Taylor 1982-6-12 4650 Lassen In Hartson Lake Refuge, ca. 1 mi north of Hartson Lake on north side of Honey Lake, ca. 13 miles southeast of Susanville. 1222 Comment
  CHSC66854  Sarcobatus vermiculatus Vernon H. Oswald 1996-9-21 8288 Lassen Modoc Plateau. Willow Creek Wildlife Area on Hwy. 139 ca. 10 mi (air) N of Susanville. Growing on the edge of the levee road along the N side of Wlillow Creek ca. 0.5 mi E of the parking area on the highway. 1490 Comment
  NY540264  Sarcobatus vermiculatus E. K. Balls 1952-10-10 18136 Lassen 5.2 miles west of Standish, Highway 395, Susanville to Alturas 1249.7 Comment
  UCD101770  Sarcobatus vermiculatus Beecher Crampton 1960-6-19 5730 Lassen southeast of Karlo; along U.S. Hwy 395. Comment
  HSC17991  Sarcodes sanguinea M. T. Milligan 1964-7-17 146 Lassen 3.5 mi. W of Eagle Lake Rd. on Marrill Flat Rd. 1677 Comment
  JEPS47551  Saxifraga oregana Milo S. Baker 1894-7-9 Lassen Pine Creek Comment
  JEPS96023  Saxifraga oregana Vernon H. Oswald and Lowell Ahart 1996-6-24 7889 Lassen 0.5 mi e of Eagle Lake Road ((A1) and 2.5 mi s of Eagle Lake, Papoose Meadows, Modoc Plateau, Montane Meadow); Papoose Meadows, Modoc Plateau, Montane Meadow 1633 Comment
  CAS-BOT-BC111302  Schoenoplectus acutus var. occidentalis R. F. Thorne; C. W. Tilforth 1969-9-6 39256 Lassen Sandy flats along Long Valley Creek c. 14 mi SE of Milford. Comment
  CAS-BOT-BC111303  Schoenoplectus acutus var. occidentalis John Thomas Howell 1975-7-23 51406 Lassen Wet grounds along Hwy. 395 between Johnstonville and Jonesville Comment
  POM111523  Schoenoplectus fluviatilis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  RSA252443  Schoenoplectus pungens Robert F. Thorne, C. W. Tilforth 1969-9-6 39257 Lassen Sandy Flats along Long Valley Creek, c. 14 miles SE of Milford 1311 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
  CHSC66415  Scirpus microcarpus Vernon H. Oswald; Lowell Ahart 1996-6-17 7819 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau. In a marshy pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  POM204113  Scirpus nevadensis J. T. Howell 1934-7-8 12506 Lassen Spalding s, Eagle Lake. Comment
  JEPS29096  Scrophularia lanceolata Lauramay T. Dempster 1961-6-17 1674 Lassen ca 4 mi n of Karlo Rd junction with Hwy 395 1432 Comment
  SD61030  Scrophularia lanceolata Darley F. Howe 1962-8-2 3923 Lassen Hillside above Parsnip Creek, Warner Mts., Modoc Natl. Forest 1829 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
  CAS-BOT-BC214262  Scutellaria nana G. Schoolcraft 1986-6-18 1630 Lassen S. side of Smoke Creek between Shinn & Smoke Creek Ranches 1493 Comment
  CAS-BOT-BC214263  Scutellaria nana H. D. Ripley; R. C. Barneby 1943-6-15 5764 Lassen Smoke Creek, N-E of Viewland 1341 Comment
  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
  SJSU5853  Scutellaria nana J. W. Tilden 1960-6-27 1508 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  SEINET13947829 Image available Scutellaria nana G. Schoolcraft 1986-1 1628 Lassen Ca 3 mi E of Hwy 395 on Hall Springs Road; 4700 ft alt., T32N, R16E, SEC32 1433 Comment
  CAS-BOT-BC240087  Secale cereale David D. Keck; J. Clausen 1935-6-24 3750 Lassen 2 mi. S. of Ravendale 1464 Comment
  JEPS17740  Senecio hydrophiloides Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5413 Lassen 4.4 mi s Patterson Ranger Station (in meadow e edge of Long Valley, s end of the Warner Mountains); Modoc National Forest, Warner Mountains, Long Valley 2057 Comment
  UCD135528  Senecio hydrophiloides Raymond D. Ratliff 1966-6-28 8 Lassen Lassen National Forest, Gooch Valley - Plot 70. 1828 Comment
  CHSC58836  Senecio hydrophilus Vernon H. Oswald; Lowell Ahart 1992-7-16 5128 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
  CHSC96754  Senecio hydrophilus Gordon Leppig 1998-8-17 1057 Lassen Modoc National Forest. 1970 Comment
  HSC95295  Senecio hydrophilus Gordon Leppig, J. Cromwell 1997-7-27 615 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  SBBG8784  Senecio hydrophilus H. and M. Dearing 1938-7-1 2241 Lassen 12 mi W of Susanville Comment
  UC1583967  Senecio hydrophilus G. Schoolcraft 1990-8-14 2122 Lassen between M.P. 56 and 57 on Highway 139 s Adin 1432 Comment
  HSC28835  Senecio integerrimus D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19263 Lassen In Harvey Valley near Cone Springs Comment
  CHSC5218  Senecio integerrimus var. exaltatus A. Santos 1946-6-13 Lassen Pine Creek, Eagle Lake. 1600 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
  UC1608996  Senecio integerrimus var. exaltatus Vernon H. Oswald and Lowell Ahart 1993-6-3 5480 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y) where it diverges from Lassen 21 (32N02) to Eagle Lake (s side of valley, between Poison Lake and Susanville); Pine Creek Valley 1725 Comment
  UCD55305  Senecio integerrimus var. exaltatus Ellen Dean; Gary Schoolcraft 2006-5-16 3134 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1251 Comment
  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
  CHSC76260  Sesuvium verrucosum Lowell Ahart; Vernon H. Oswald 1999-9-13 8217 Lassen Field about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  UC1143016  Sidalcea glaucescens August L. Hormay 1934-7-2 Lassen 1/4 mi nw Black's Mtn; Lassen National Forest, nw of Black's Mtn 1706 Comment
  UCR18733  Sidalcea glaucescens Frank C. Vasek 1975-7-11 750711- 14 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  HSC22981  Sidalcea malviflora John Pratt 1970-7-9 71 Lassen 1677 Comment
  CAS-BOT-BC205776  Sidalcea oregana David D. Keck; J. Clausen 1935-6-24 3740 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC30043  Sidalcea oregana Cindy Prouty 1978-7-27 7 Lassen Little Antelope Valley, W of Eagle L. 1792 Comment
  CHSC6184  Sidalcea oregana R. Gein 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  UCD18967  Sidalcea oregana Raymond D. Ratliff 1965-8-6 53 Lassen Lassen National Forest, Harvey Valley Allotment (Ashurst Well). 1950 Comment
  UC619263  Sidalcea oregana subsp. oregana J. and H. W. Grinnell 1938-7-13 1099 Lassen near Ravensdale; near Ravensdale 1554 Comment
  POM260877  Sidalcea oregana subsp. oregana Alice Eastwood, J. T. Howell 1940-6-11 7982 Lassen Big Valley Mountains. Comment
  CHSC100901  Sidalcea oregana subsp. spicata R. A. Schlising; Peter Metropulos 1974-7-22 3154 Lassen South of Eagle Lake at Colman Lake. Comment
  UC725938  Sidalcea oregana subsp. spicata A. A. Heller 1938-7-28 15303 Lassen a mi e Westwood; e of Westwood 1524 Comment
  NY177476  Sidalcea oregana var. spicata J. T. Howell 1934-7-6 12442 Lassen Harvey Valley Comment
  UC1125817  Silene bernardina A. Simontacchi 1940-7-3 928 Lassen 2.3 mi n Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1844 Comment
  UC1483814  Silene bernardina G. Schoolcraft 1979-6-7 129 Lassen northern Skidaddle Mountains 2011 Comment
  CHSC5229  Silene douglasii J. B. Kimsey 1946-6-10 Lassen Eagle Lake. Pelican Point. 1584 Comment
  UC8440  Silene douglasii M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Comment
  JEPS51005  Silene lemmonii Brown and Wieslander 1922-7-18 34 Lassen Martin Sprs Eagle Lake, Martin Sprs Comment
  SEINET8879824  Silene menziesii R. R. Halse 2006-8-3 6992 Lassen Modoc NF, along Blue Lake Road N of Blue Lake, above Parsnip Creek, ca 15 miles ESE of Likely. 1860 Comment
  JEPS123843  Silene nuda Lowell Ahart, John Dittes 2015-7-14 20334 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  JEPS87996  Silene nuda Barbara Ertter 1988-7-25 7867 Lassen ca 1.5 mi e Diamond Peak (ca 10 airmi due s of Susanville, ridge of Diamond Mts.); ridge of Diamond Mts., e of Diamond Peak 2255 Comment
  UCD18970  Silene nuda subsp. insectivora Raymond D. Ratliff 1965-8-4 41 Lassen Lassen National Forest, Harvey Valley Allotment (HV 25-19). 1700 Comment
  SEINET10537591  Silene nuda subsp. insectivora Mary Susan Taylor 1982-7-8 Taylor 4790 Lassen T23N R17E sw sec 16. Beckwourth Pass quad. Along Scott Rd just s of bend, in Sagebrush Scrub, ca. 4 mi ne of Beckwourth Pass, s of Constantia. 4700 ft. 1432 Comment
  CAS-BOT-BC74890  Sinapis alba John Thomas Howell 1974-7-8 50502 Lassen Sierra Nevada. Susanville. 1295 Comment
  CHSC91206  Sisymbrium altissimum Lowell Ahart; John Dittes 2005-6-2 11921 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  JEPS114987  Sisyrinchium bellum Lowell Ahart, John Dittes 2008-6-20 14964 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  UCD138789  Sisyrinchium bellum Gerald Dickinson 1963-7-2 71 Lassen east of Willow Creek campground, south of Hayden Hill, State Highway 139. 1219 Comment
  POM82470  Sium suave Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UC21381  Sium suave J. Burtt Davy Jun 17 1897-Jun 24 1897 3363 Lassen Honey Lake Valley Comment
  UCR88862  Smilacina stellata J. T. Howell, G. H. True, Margaret Williams 1973-6-28 49421 Lassen Sierra Nevada Mtns/ Modoc Plateau, Elysian Valley, west of Janesville 1326 Comment
  JEPS32384  Solidago spectabilis W. L. Jepson 1918-8-4 7812 Lassen Horse Lake 1554 Comment
  CAS-BOT-BC364907  Solidago velutina subsp. californica Louella Bass 1973-9-4 EV 134 Lassen Elysian Valley 1325 Comment
  POM38169  Sonchus asper Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  UC1583971  Sonchus asper G. Schoolcraft 1990-7-31 2117 Lassen along Hwy 299 between Bieber and Nubieber 1249 Comment
  CHSC27654  Sparganium emersum subsp. emersum Jerry Snodgrass 1978-7-11 50 b Lassen Papoose Creek, SE corner of Eagle L. Meadow; in pool. 1584 Comment
  CHSC41847  Sparganium emersum subsp. emersum P. V. Caldwell 1972-7-13 297 Lassen Eagle Lake. In Papoose Ck. From the road that crosses the creek towards Papoose Meadow, 1st 600 m. Comment
  CHSC66869  Sparganium erectum subsp. stoloniferum Vernon H. Oswald; Lowell Ahart 1996-9-10 8273 Lassen Mountain Meadows Reservoir SW of Westwood. Along the northwest shore of the reservoir between the railroad and Indian Ole Dam. 1539 Comment
  CAS-BOT-BC374760  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1989-5-3 1865 Lassen North end of Secret Valley s. of Karlo Comment
  UC21374  Sphenosciadium capitellatum M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  CAS-BOT-BC149626  Spiraea douglasii Lassen 1927 G. S. Crew 1927-7-24 87 Lassen Harvey Valley, Lassen National Forest 1676 Comment
  CAS-BOT-BC383109  Spiraea douglasii Andrew Townesmith; Karen M. Meyer 2007-7-20 840 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
  CHSC65281  Spirodela polyrhiza Vernon H. Oswald 1995-8-21 7213 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. At the SW corner of the lake. 1859 Comment
  UC773921  Stachys ajugoides var. rigida L. R. Short and Wm. Gansberg 1936-7-9 S- 485 Lassen Burgess Spring Experiment Range Lassen Forest 1795 Comment
  HSC31740  Stanleya elata Donald Spalinger 1974-5-16 66 Lassen E of Hurlong in the Doyle Winter Deer Range 1220 Comment
  HSC25048  Stanleya viridiflora John Pratt 1970-7-2 46 Lassen 1220 Comment
  UC1951078  Stellaria borealis subsp. sitchana Debra Valov 2009-4-24 2009013 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  SEINET10965514  Stellaria longipes Mary Susan Taylor 1982-6-12 Taylor 4660 Lassen T25N R17E se sec 8. Doyle quad. In sandy Sagebrush Scrub, in Doyle, ca. 1/2 mi e of Hwy 395. Comment
  SEINET11933235  Stellaria longipes J. D. Prouty 1978-1 29 Lassen S of Eagle L., along Papoose Creek, ca 1 mi from Gallatin Rd., T31N, R11E, Sec. 17 1591 Comment
  CHSC229  Stellaria longipes var. longipes 1944-6-30 Lassen Grasshopper Valley near Eagle Lake. 1615 Comment
  SEINET10537644  Stellaria longipes var. longipes Mary Merello 1993-6-28 Merello 756 Lassen Lassen National Forest. At end of Forest Service Road 31N01 at lake. Pine woodland. 1740 Comment
  UC1523750  Stellaria longipes var. longipes Gary Schoolcraft 1981-6-25 484 Lassen e fork Willard Creek 1584 Comment
  JEPS109943  Stenotus stenophyllus Dean W. Taylor 2004-5-12 19065 Lassen Willow Creek, along Forest Road 38N04 0.4 miles North of Highway 139 1584 Comment
  JEPS17401  Stephanomeria exigua subsp. exigua Rimo Bacigalupi and G. T. Robbins 1955-7-21 5425 Lassen In drainage of Rush Creek, S of the Smoke Creek Ranch Road, 1.3 mi E of the Nevada State line and 17.5 mi E of U.S. Highway 395. 1341 Comment
  CAS-BOT-BC375593  Stephanomeria lactucina Gary Schoolcraft 1982-7-14 785 Lassen West on Constantia 1463 Comment
  CHSC71870  Stephanomeria paniculata Vernon H. Oswald; Lowell Ahart 1998-9-8 9588 Lassen Kramer Rd. 3.1 mi south of Lookout. 1280 Comment
  JEPS28674  Stephanomeria tenuifolia George W. Gillett 1957-7-26 901 Lassen Butte Lake, point of rocks w of outlet an above trail Lassen Volcanic National Park 1844 Comment
  UCR244065  Stipa comata Jim Andre, G. L. Clifton 1993-6-9 19691 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
  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
  SEINET8080232  Stipa occidentalis var. californica M. J. Williams 1974-7-26 74 -L-37 Lassen 2 miles W of Hallelujah Junction, S of Hwy. 70. 1494 Comment
  UCR183194  Stipa thurberiana Jim Andre, G. L. Clifton 1993-5-28 7715 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  OBI22293  Stipa webberi Robert F. Hoover 1940-9-29 4647 Lassen Pass between Shaffer Mt and Warren Peak Comment
  POM95030  Streptanthus cordatus Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.?] 1220 Comment
  HSC23510  Stuckenia pectinata R. Carter 1967-7-13 594 Lassen 5 mi. E of Eagle Lake Biology Station at point where road comes nearest to Willow Creek 1561 Comment
  UC1123452  Swertia albicaulis var. albicaulis A. Simontacchi 1940-6-6 823 Lassen 3.6 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1737 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
  POM68227  Symphoricarpos acutus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  RSA18164  Symphoricarpos acutus C. B. Wolf 1929-9-1 3781 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  UC1120025  Symphoricarpos mollis A. Simontacchi 1940-6-24 890 Lassen 6.4 mi sw Jacks Lake; Lassen National Forest, Halls Flat Quad. 1950 Comment
  CAS-BOT-BC98932  Symphyotrichum foliaceum var. parryi Alice Eastwood 1912-8-22 1831 Lassen Trail from Morgan's Springs to Lassen Butte Comment
  CAS-BOT-BC97917  Symphyotrichum frondosum John Thomas Howell 1934-7-8 12508 Lassen [Spalding's] Spalding, Eagle Lake Comment
  UC1924205  Symphyotrichum spathulatum Debra Valov 2005-8-20 2005219 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  SFV7757  Symphyotrichum spathulatum T. Gordon, K. Kimbrough 1975-8-15 1211 Lassen 16 miles south of Adin. 1402 Comment
  CHSC71103  Tamarix parviflora Vernon H Oswald; Lowell Ahart 1998-5-22 9096 Lassen Hwy 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  CHSC30556  Taraxia subacaulis Sori H. Shad 1970-6-26 15 Lassen Collected in Deans Meadow. 1828 Comment
  CHSC6192  Taraxia subacaulis P. Balch 1955-6-1 Lassen Eagle Lake. Stephen's Meadows. 1905 Comment
  CHSC6193  Taraxia tanacetifolia W. Vinyard 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  JEPS31727  Taraxia tanacetifolia W. L. Jepson 1918-8-2 7767 Lassen Beckwith Pass 1463 Comment
  JEPS31730  Taraxia tanacetifolia W. L. Jepson 1918-8-15 7998 Lassen Grasshopper Valley 1615 Comment
  JEPS31732  Taraxia tanacetifolia C. S. Robinson 1927-6-25 38 Lassen near Westwood Jct. (sw Lassen Co.); Lassen <National> Forest, Norval Flat 2051 Comment
  CDA37990  Taraxia tanacetifolia T. C. Fuller 1959-7-7 s.n. Lassen Highway 395, 0.8 mile south of Termo. 0 Comment
  CAS-BOT-BC329047  Tetradymia canescens Elmer I. Applegate 1897-6-4 3034 Lassen Madeline Plains Comment
  CDA18263  Tetradymia canescens G. D. Barbe 1974-8-2 1925 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC33331  Tetradymia canescens P. Reynolds 1979-7-4 10 Lassen 1 mi. ne of Wendel. Base of Wendel Canyon. 1295 Comment
  CHSC50825  Tetradymia canescens Vernon Oswald; Lowell Ahart 1990-7-25 4398 Lassen Intersection of Hwy 70 and Scott Rd, 2.2 mi west of Hwy 395. Roadside bank. 1463 Comment
  LA204037  Tetradymia canescens Lewis S. Rose; 1934-7-23 34409 Lassen Reno Junction 1371 Comment
  CAS-BOT-BC329050  Tetradymia canescens John Thomas Howell; Gordon H. True; Wayne Daken 1974-7-30 50678 Lassen summit ridge of Diamond Mtn. 2346 Comment
  CHSC31084  Tetradymia glabrata J. S. White 1980-4-14 125 Lassen 3 mi ne of Wendel. 1371 Comment
  CDA8932  Tetradymia spinosa Robin Breckenridge 2007-5-1 PDR# 1349824 D Lassen Wendel. 0 Comment
  CHSC1496  Thalictrum fendleri 1944-7-7 Lassen Bogard. 1722 Comment
  CHSC93248  Thelypodium crispum John Dittes; Scott Chamberlain 2004-6-28 1012 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
  UC10930  Thelypodium crispum M. S. Baker and F. Nutting 1894-7-6 Lassen Dixey Valley Comment