Search Results — 2000 specimen records retrieved (1611 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  POM85381  Acer glabrum var. torreyi Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain, Susanville, Perkins Ranch 1829 Comment
  CDA18380  Acer negundo G. D. Barbe 1978-7-11 2400 Lassen Madeline Plains; Madeline Plains, West Side Rd. W of Termo. 1615 Comment
  CHSC12493  Achillea millefolium Carol Weld 1969-6-20 20 Lassen Dean's Meadow. 1950 Comment
  CHSC61621  Achillea millefolium Arthur C. Barrett 1918-6-19 29 Lassen Laufman Ranger Station. NW slope in Plumas Forest. 1463 Comment
  UC1136757  Achillea millefolium George A. Fischer and Irwin H. Johnson 1933-7-14 F 275 Lassen Patterson Flat 1737 Comment
  UC1136758  Achillea millefolium George A. Fischer and Irwin H. Johnson 1933-7-12 F 207 Lassen Grass Valley 1700 Comment
  UC506997  Achillea millefolium George A. Fisher and Irwin H. Johnson 1933-7-12 F 207 Lassen Grass Valley; Lassen Natl. Forest Comment
  CAS-BOT-BC260404  Achnatherum hymenoides L. P. Janeway 1990-7-4 3769 Lassen Near E side of saddle ca 0.8 mile NE of Meadowview Peak 1981 Comment
  UC593529  Achnatherum hymenoides E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1745 Lassen e-facing slope of gully in mountain above Red Rock 1420 Comment
  SEINET249775 Image available Achnatherum lemmonii Beecher Crampton 1954-7-5 2054 Lassen 4.5 miles west of Susanville, along state highway 36. 1433 Comment
  UC163595  Achnatherum lemmonii Milo S. Baker Lassen s side Dixie Mt. Dixie Mt. Comment
  CAS-BOT-BC210742  Achnatherum nelsonii John Thomas Howell 1976-7-20 52026 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  UCD50843  Achnatherum nevadense B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  CAS-BOT-BC216456  Achnatherum occidentale subsp. californicum Clare B. Hardham 1971-8-22 18413 Lassen Diamond Mountain 2346 Comment
  CHSC106321  Achnatherum occidentale subsp. californicum Lowell Ahart; John Dittes 2010-7-31 17027 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
  UC1037122  Achnatherum occidentale subsp. californicum Leo Whitney 1935-6-23 3296 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1024959  Achnatherum occidentale subsp. pubescens Leo Whitney 1935-6-24 3303 Lassen ca. 13 mi w of n end of Eagle Lake (Squaw Valley); Squaw Valley Comment
  UCD51205  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2069 Lassen Along US Hwy. 395, 1 mile east of Johnstonville. Comment
  UCD51211  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2064 Lassen along Hwy. 36, 4.5 miles west of Susanville. 1432 Comment
  JEPS107797  Achnatherum thurberianum Lowell Ahart, John Dittes 2005-6-2 11946 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, about 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  UC1031354  Achnatherum thurberianum Leo Whitney 1935-6-19 3258 Lassen 13 mi w of upper end Eagle Lake; Lassen National Forest, Ashurst Mt. 1584 Comment
  UC584246  Achnatherum thurberianum G. L. Stebbins Jr. and J. A. Jenkins 1937-7-6 2208 Lassen Inspiration Point just w of town Susanville 1280 Comment
  UC593456  Achnatherum thurberianum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1744 Lassen gully on mountain above Red Rock 1420 Comment
  UCD51425  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  UCD51441  Achnatherum thurberianum L. Whitney 1935-6-19 3258 Lassen Ashurst Mountain, 13 miles west of upper end of Eagle Lake, Lassen National Forest. 1584 Comment
  UCD51444  Achnatherum thurberianum R. Tofsrud 1947-7-1 223 Lassen Between Ravendale and Thermos. Comment
  UC579786  Achnatherum webberi David D. Keck and J. Clausen 1935-6-24 3749 Lassen 2 mi s, on borders of an alkali mud flat Ravendale 1465 Comment
  JEPS127283  Acmispon americanus var. americanus Lowell Ahart, John Dittes 2016-7-13 21119 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  SEINET5327496  Acmispon americanus var. americanus G. Schoolcraft 1995-6-27 2501 Lassen Cherry Creek 1524 Comment
  CAS-BOT-BC418769  Aconogonon phytolaccifolium Alice Eastwood 1912-8-22 1878 Lassen Morgans Springs [Morgans Hot Springs, el. 5000 ft.], Lassen Butte Region Comment
  CAS-BOT-BC383114  Agastache parvifolia Andrew Townesmith; Karen M. Meyer 2007-7-22 847 Lassen Lassen National Forest, Eagle Lake Ranger District. Intersection of Forest Service road 32N09 and Forest Service route 10, 6 miles SW of state route 44 1971 Comment
  CHSC21954  Agastache parvifolia Robert A. Schlising 1974-7-19 3152 Lassen SE of Eagle Lake, about 1.1 mi from Eagle Lake Field Station along dirt road. Comment
  CHSC4853  Agastache parvifolia R. Carter 1967-7-13 584 Lassen On the s side of road to Eagle Lake Biology Station and Willow Creek. 1584 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
  UCD124873  Agastache parvifolia John F. Sorenson 1986-7-5 s.n. Lassen 9 miles southeast of Termo, Bailey Creek drainage; Bailey Creek above Bailey Reservoir. Comment
  CAS-BOT-BC30238  Ageratina occidentalis George Wilson Gillett 1957-7-26 904 Lassen Butte lake, point of rocks west of outlet and above trail 1844 Comment
  CAS-BOT-BC383105  Ageratina occidentalis Andrew Townesmith; Karen M. Meyer 2007-7-20 836 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 1429 Comment
  CDA18260  Agoseris glauca G. D. Barbe 1974-8-2 1922 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC64836  Agoseris glauca var. glauca Vernon H. Oswald 1995-6-26 6944 Lassen Modoc Plateau. Spooner Rd. ca. 0.3-0.4 mi E of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  JEPS107469  Agoseris glauca var. glauca Lowell Ahart, John Dittes 2005-6-1 11849 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
  RSA715616  Agoseris glauca var. glauca L. Ahart 2005-6-1 11849 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  UC1609115  Agoseris glauca var. glauca Vernon H. Oswald and Lowell Ahart 1993-6-14 5530 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), upper beach, between road and lake); Eagle Lake 1566 Comment
  UCD128649  Agoseris glauca var. glauca Grady L. Webster 1989-5-13 7704 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  CDA9936  Agoseris glauca var. laciniata T. C. Fuller 1963-6-11 10664 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  CAS-BOT-BC22893  Agoseris heterophylla Margaret J. Williams; Gary Schoolcraft; Arnold Tiehm 1986-5-12 82- 19 -1 Lassen Smoke Creek Rd., 0.1 mi E of Hwy 395 1371 Comment
  CAS-BOT-BC433230  Agoseris heterophylla K. L. Chambers; Peter G. Dorris 1963-5-11 s.n. Lassen Red Rock Road, just east of Hwy. 395 (and just w. of Nevada State Line), ca. 10 mi. n. of Hwy. 70 junction, and s. of Constantia. Comment
  CAS-BOT-BC127581  Agropyron cristatum John Thomas Howell 1961-9-25 36970 Lassen Sierra Nevada. East side of Beckwourth Pass. 1554 Comment
  HSC100160  Agropyron cristatum J. P. Smith, & J. O. Sawyer 2011-8-14 13375 Lassen Ramhorn Campground. 1383 Comment
  SEINET3915755  Agropyron cristatum Paul Gallian, David B. Dunn 1971-6-2 484 Lassen 5 mi. S of Milford near Honey Lake on U.S. Hwy. 395.; 0 1250 Comment
  RSA299167  Agropyron desertorum J. T. Howell 1974-7-8 50468 Lassen Susanville 1296 Comment
  CAS-BOT-BC127237  Agrostis exarata John Thomas Howell; Gordon H. True 1973-7-31 50021 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1737 Comment
  HSC69074  Agrostis exarata Gary Schoolcraft 1980-8-13 351 Lassen N side of Diamond Mountain, south of Susanville 1951 Comment
  UC53515  Agrostis exarata M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley Comment
  UCD53171  Agrostis pallens L. D. Whitney 1935-6-27 s.n. Lassen near Fruit Grower Supply Co. Comment
  UCD53272  Agrostis scabra L. Whitney 1933-8-4 2228 Lassen Sheepshead, 10 miles northwest of north end of Eagle Lake, Lassen National Forest. 1889 Comment
  CAS-BOT-BC246539  Agrostis stolonifera Leland S. Smith 1919-8-10 1132 Lassen Modoc National Forest, Ash Valley - Templeton's Meadow 1463 Comment
  POM75113  Aliciella lottiae Marcus E. Jones 1897-6-24 9872 Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC267061  Alisma John Thomas Howell 1974-7-10 50546 Lassen Elysian Valley 1325 Comment
  UC978579  Alisma gramineum Verne Grant and Irving Schneider 1947-9-6 8382 Lassen creek midway between Eagle Lake and Susanville Comment
  RSA119134  Alisma plantago-aquatica Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UC725432  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen e Fredonyer Pass (e of Westwood on State Highway #36) 1645 Comment
  UC843269  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen e Fredonyer Pass (on Highway #36) 1645 Comment
  CAS-BOT-BC459569  Allium acuminatum G. Schoolcraft 1986-5-19 1574 Lassen North slope of Bald Mtn., Susanville 1280 Comment
  UC119964  Allium amplectens T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  JEPS94130  Allium anceps Vernon H. Oswald and Lowell Ahart 1998-5-22 9102 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd. 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  HSC47285  Allium anceps Dale McNeal 1978-5-30 2127 Lassen Beside Hwy. 395, 3 mi. S of Ravendale 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
  RSA487942  Allium atrorubens var. atrorubens A. Tiehm, J. Nachlinger 1988-6-2 11702 Lassen South side of Shaffer Mountain, 3.4 miles north of the Wendel road on Hwy 395 from Susanville to Alturas, west of the highway. 1387 Comment
  HSC30074  Allium campanulatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19268 Lassen Harvey Valley near Cone Springs Comment
  CAS-BOT-BC464482  Allium campanulatum A. H. Kramer 1937-1-1 s.n. Lassen Lassen National Park, near Prospect Pk. Comment
  RSA504589  Allium lemmonii Bruce Bartholomew, B. Anderson 1988-6-25 4371 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  RSA27674  Allium lemmonii C. L. Hitchock 1940-5-26 6640 Lassen Overflow of Pitt River, 1 mile west of Bieber, in adobe soil Comment
  CAS-BOT-BC474045  Allium parvum Doris Kildale Gillespie 1930-5-13 9371 Lassen Between Susanville and Janesville Comment
  SEINET3878898  Allium platycaule D. W. McNeal 1980-6-1 2339 Lassen In open areas on the slope below Hwy #139, 19.2 mi S of the Modoc Co. line.; 0 Comment
  UC1299751  Allium tolmiei var. tolmiei Freed W. Hoffman 1946-6-9 731 Lassen on Highway 395 about 10 mi s Alturas; Dry Creek 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
  RSA129209  Alopecurus aequalis Alice Yates 1936-8-11 6068 Lassen Baxter Creek; Susanville 1280 Comment
  RSA264236  Alopecurus aequalis A. A. Beetle 1948-6-28 2795 Lassen 10 miles west of Chester, rte. 36 Comment
  SEINET3917718  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen California, Lassen County, 10 miles west of Chester, rte. 36.; 0 Comment
  UC1024654  Alopecurus aequalis Leo Whitney 1933-8-4 2200 Lassen ca. 8 mi. n.w. Eagle Lake (Slate Creek); Lassen Nat'l Forest, Slate Creek 1920 Comment
  UCR80283  Alopecurus aequalis A. A. Beetle 1941-6-28 2795 Lassen Route 36, 10 mi west of Chester Comment
  RSA772750  Alopecurus aequalis var. aequalis R. F. Thorne, Larry E. DeBuhr 1975-8-22 47211 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CDA42956  Alopecurus carolinianus L. Ahart, John Dittes, Todd Sloat 2013-6-8 18731 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS120874  Alopecurus carolinianus Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18731 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
  CAS-BOT-BC138010  Alopecurus geniculatus Stuart K. Harris 1960-6-23 21410 Lassen Bed of Poison Lake. 1645 Comment
  CHSC99293  Alopecurus geniculatus Lowell Ahart; John Dittes 2008-6-20 14960 Lassen About 300 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
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  CHSC29942  Amaranthus blitoides Robin L. Ondricek 1978-8-2 111 Lassen Parking area at Eagle Lake Field Station. 1554 Comment
  CHSC71844  Amaranthus powellii Vernon Oswald; Lowell Ahart 1998-9-8 9570 Lassen Hwy 299 at the RR overpass on the east side of Nubieber. 1255 Comment
  CHSC66845  Ambrosia acanthicarpa Vernon Oswald 1996-10-3 8298 Lassen North of Susanville on Horse Lake Road (Lassen 546) 3.6 mi E of Hwy. 139. Modoc Plateau. 1554 Comment
  SEINET3871758  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen Along State Hwy. 70 at Beckwourth Pass ca 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles E of Sierra Valley.; 0 1584 Comment
  SD43502  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  CAS-BOT-BC222256  Amsinckia John Thomas Howell 1934-6-10 11899 Lassen 5 miles n. of Horse Lake on road to Alturas Comment
  RSA0089911  Amsinckia menziesii L. Ahart 2005-6-1 11899 Lassen North side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 mile (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah junction. 1460 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
  UC1182224  Amsinckia menziesii var. menziesii Francia Chisaki 1956-5-31 891 Lassen 15.4 mi n Litchfield (on Hwy #395) Comment
  UC24607  Amsinckia menziesii var. menziesii Milo S. Baker 1893-7-14 Lassen Money Lake Valley 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
  CHSC5040  Anaphalis L. B. Barlow 1967-7-4 95 Lassen 5 mi. south of Eagle Lake Biological Station on Gallatin Beach Road. 1737 Comment
  JEPS94117  Anisocoma acaulis Vernon H. Oswald and Lowell Ahart 1998-5-22 9134 Lassen ca. 3.5 mi. n. Doyle (Fort Sage Rd. 2.3 mi. n. of Hackstaff Rd.) 1341 Comment
  CAS-BOT-BC64112  Anisocoma acaulis G. Schoolcraft 1997-5-7 2586 Lassen Port Sage Mtns. n. of Indian Spring 1584 Comment
  CHSC12433  Antennaria Robert Severin 1969-6-26 22 Lassen Papoose Meadow, 4 mi s of E.L.B.S.; 1/4 mi n of Cow Camp. 1630 Comment
  SEINET2035368  Antennaria argentea C. L. Hitchcock 1940-5-26 6616 Lassen Lava beds ca. 12 miles north of Fall River Mills (Shasta Co.) on Fall River 1370 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
  CAS-BOT-BC26644  Antennaria argentea subsp. aberrans Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CHSC5193  Antennaria dimorpha 1945-6-1 Lassen Eagle Lake. 1584 Comment
  CHSC7640  Antennaria dimorpha Beverley J. Wise 1969-4-13 11 Lassen 5.6 mi east of junction of Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1463 Comment
  JEPS107691  Antennaria dimorpha Lowell Ahart, John Dittes 2005-6-1 11915 Lassen On the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  UC1137751  Antennaria dimorpha L. R. Short 1936-6-8 S- 386 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1743 Comment
  RSA713120  Antennaria geyeri L. P. Janeway, B. Castro 2005-7-10 8478 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01 1859 Comment
  SEINET3145605  Antennaria geyeri M. E. Jones 1897-6-25 sn Lassen Susanville 1341 Comment
  UC1609103  Antennaria geyeri Vernon H. Oswald and Lowell Ahart 1993-6-28 5584 Lassen Harvey Valley Rd (33N02) 1.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1731 Comment
  CAS-BOT-BC69140  Antennaria geyeri Clarence R. Quick 1964-7-29 64 -89 Lassen Blacks Mt. Experimental Forest 1798 Comment
  SJSU7638  Antennaria geyeri J. W. Tilden 1960-6-27 1510 Lassen foot of Moonlight Road in outskirts Westwood 1524 Comment
  RSA32730  Antennaria luzuloides A. A. Heller 1938-6-23 15189 Lassen State highway 36, about 4 miles east of Westwood Comment
  UC1609101  Antennaria luzuloides Vernon H. Oswald and Lowell Ahart 1993-6-14 5527 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), upper beach between road and lake); Eagle Lake 1566 Comment
  CAS-BOT-BC77291  Antennaria microphylla Mrs. Marian L. Campbell 1916-7-12 s.n. Lassen Mt. Peterson Comment
  SBBG63415  Antennaria rosea S. W. Hutchinson, M. N. Ackley -Jun-1925 214 Lassen Eagle Lake 1554 Comment
  CHSC68842  Antennaria rosea subsp. confinis Vernon H. Oswald; Lowell Ahart 1997-6-24 8647 Lassen South of Susanville at the small pond on the crest of Diamond Mtn., about mid-way between Aspen Flat and Red Rock Lookout. 2249 Comment
  CHSC6221  Apocynum androsaemifolium W. Vinyard 1946-6-17 Lassen Eagle Lake, summit of Mt. Fredonyer. 2349 Comment
  HSC69617  Apocynum androsaemifolium Gary Schoolcraft 1979-7-21 81 Lassen Little Spencer Basin 183 Comment
  UC1035982  Apocynum androsaemifolium Helen K. Sharsmith 1955-6-27 4516 Lassen adjacent to Hwy. 89 n. of Hat Creek Ranger Station; Lassen Nat'l Forest 1158 Comment
  JEPS95872  Apocynum cannabinum Vernon H. Oswald and L. Ahart 1999-6-9 9739 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.4 mi west of Hwy. 395: T31N R15E NE1/4 Sect. 3, 4450 ft elevation, sagebrush scrub, volcanic rock substrate 1356 Comment
  CAS-BOT-BC392211  Aquilegia formosa Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt. Susanville, Perkin's Ranch 2133 Comment
  CHSC4814  Aquilegia formosa var. truncata R. Carter 1967-7-29 573 Lassen Found in Murrer's meadow, W side where canal runs. 1584 Comment
  UC773931  Arabis L. R. Short 1936-6-1 S- 354 Lassen Burgess Spring Experiment Range Lassen Forest 1859 Comment
  SEINET10539684  Arabis Paul Gallian, David B. Dunn 1971-6-2 Gallian 496 Lassen Approx 22 mi s of adin on state hwy 139; in basalt. Assoc: juniper, artemisia. 1646 Comment
  SEINET228463  Arabis holboellii var. pinetorum Reed C. Rollins, Kathryn W. Rollins 1981-5-31 81176 Lassen Just north of Eagle Lake. Comment
  RSA0129096  Arabis oligantha Franklin P. Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  UC1504479  Arabis rectissima var. rectissima Reed C. Rollins and Kathryn W. Rollins 1981-5-31 81172 Lassen 2.2 mi n CA Hwy 36 junction with County Hwy A-1 Comment
  NY119565  Arabis sparsiflora H. D. D. Ripley 1944-5-29 5948 Lassen South of Constantia 1447.8 Comment
  NY119566  Arabis sparsiflora H. D. D. Ripley 1944-5-29 5948 Lassen South of Constantia 1447.8 Comment
  JEPS107301  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
  CAS-BOT-BC45892  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  CAS-BOT-BC45896  Arctostaphylos nevadensis A. H. Kramer 1929-1-1 s.n Lassen Prospect Peak Comment
  CAS-BOT-BC45900  Arctostaphylos nevadensis A. H. Kramer 1930-6-9 s.n Lassen Prospect Pk, Lassen National Park Comment
  CAS-BOT-BC45894  Arctostaphylos nevadensis Clare B. Hardham 1971-8-22 18386 Lassen North slopes 2133 Comment
  SD43498  Arctostaphylos patula Philip A. Munz 1947-5-18 11865 Lassen Fredoyner Forestry Public Campground, W of Susanville 1509 Comment
  CAS-BOT-BC27516  Arenaria congesta var. simulans Amos Arthur Heller 1938-6-23 15198 Lassen 2 miles E of Fredonyer Pass 1645 Comment
  UC1537301  Arenaria congesta var. suffrutescens Gordon H. True Jr. 1936-6-27 561 Lassen Top of Hot Spring Mountain Hot Spring Mountain 1981 Comment
  JEPS124520 Image available Argemone munita Virginia Hardham 1965-7-12 115 Lassen 1.9 mi. north of Milford on HW 395 Comment
  RSA11786  Argemone munita subsp. rotundata Elmer I. Applegate 1921-9-4 3345 Lassen Hills north of Susanville Comment
  CDA10113  Arnica amplexicaulis G. D. Barbe 1982-7-12 3871 Lassen Along South Grasshopper Road at west base of Grasshopper Ridge, 4 miles south of Termo-Grasshopper Road. Comment
  CAS-BOT-BC82117  Arnica chamissonis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49429 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC60873  Arnica chamissonis Vernon H. Oswald; Lowell Ahart 1993-7-8 5665 Lassen Pittville Rd. (Lassen 111, 36N01) 2.4 mi N of Hwy. 44, on the NE edge of Poison Lake. 1705 Comment
  JEPS35887  Arnica chamissonis Brown and Wieslander 1922-7-30 26 Lassen Martin Springs , Eagle Lake Comment
  UC1776719  Arnica parryi G. Schoolcraft 1997-8-1 2386 Lassen About 2 miles W of Boot Lake 2255 Comment
  CHSC118795  Artemisia arbuscula subsp. arbuscula L. P. Janeway 2015-8-9 11823 Lassen Warner Mountains. Along Road 39N06 at the 64 Road (39N01- the road to Patterson Camprgound); 0.7 air-km west of Long Valley, 5.3 air-km northeast of Blue Lake. 2179 Comment
  RSA78904  Artemisia arbuscula subsp. arbuscula E. K. Balls, Percy C. Everett 1952-10-10 18145 Lassen 6.7 mi. SE of Ravendale, Hwy 395, between Susanville and Alturas 1280 Comment
  RSA78915  Artemisia arbuscula subsp. arbuscula E. K. Balls, Percy C. Everett 1952-10-10 18142 Lassen 8 mi. SE of Ravendale, Hwy 395, between Susanville and Alturas. 1280 Comment
  UC1136977  Artemisia arbuscula subsp. arbuscula L. R. Short 1936-9-30 S- 506 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1746 Comment
  UCR268958  Artemisia arbuscula subsp. arbuscula Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31433 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  CAS-BOT-BC84831  Artemisia cana subsp. cana Elmer I. Applegate 1897-6-3 859 Lassen North end of Madeline Plains, northern Lassen County. Comment
  CAS-BOT-BC90331  Artemisia douglasiana John Thomas Howell 1975-7-23 51390 Lassen Susanville 1295 Comment
  CAS-BOT-BC93741  Artemisia ludoviciana subsp. incompta Clare B. Hardham 1969-8-28 17463 Lassen Sierra Nevada - slope west of Janesville Comment
  CHSC111259  Artemisia ludoviciana subsp. ludoviciana L. P. Janeway; B. Castro 2012-7-2 10934 Lassen Modoc Plateau. Along Skedaddle Ranch Road 6.4 road km north of Skedaddle Creek at an unnamed tributary of Bull Creek. 1533 Comment
  SEINET7153395 Image available Artemisia nova A. A. Beetle 1957-8-16 12580 Lassen 8 miles north of Litchfield Comment
  CHSC30627  Artemisia tridentata M. A. Dubin 1975-7-20 8 Lassen Eagle Lake Field Station by Turkey Roll Hill. 1569 Comment
  CAS-BOT-BC97324  Artemisia tridentata subsp. tridentata Margaret Williams; Steven Williams 1974-7-26 74 -L-4 Lassen area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC97326  Artemisia tridentata subsp. tridentata Clare B. Hardham 1971-8-22 18395 Lassen Diamond Mountain 2346 Comment
  CHSC76080  Artemisia tridentata subsp. tridentata Lowell Ahart; Vernon H. Oswald 1999-9-13 8202 Lassen On the west side of the dirt road and 1/4 mile south of the sign-in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  UC1136978  Artemisia tridentata subsp. tridentata George A. Fisher and Irwin H. Johnson 1933-9-8 F 282 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1706 Comment
  UC762002  Artemisia tridentata subsp. tridentata R. F. Hoover 1940-9-28 4639 Lassen Leavitt Comment
  HSC3295  Asclepias cordifolia H. E. Parks, S. T. Parks Jun 1928 226 Lassen Lassen National Park, Drakesbad 1982 Comment
  JEPS124871 Image available Asclepias speciosa Peter Schultz 1967-7-11 71 Lassen 1 mile south of Milford on U. S. 395. Comment
  RSA503251  Aster integrifolius Bruce Bartholomew, B. Anderson 1988-7-22 4502 Lassen Mosquito Creek, 2km SW of Patterson Meadow, southern end of the Warner Mtn. 2080 Comment
  RSA0006693  Astragalus agrestis H. D. Ripley, R. C. Barneby 1944-5-30 5976 Lassen North of Termo; 1662 Comment
  CAS-BOT-BC177439  Astragalus andersonii Margaret Williams 1974-7-27 74 -L-55 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CAS-BOT-BC177440  Astragalus andersonii G. Schoolcraft 1996-5-13 2520 Lassen Fort Sage OHV area 3 miles ne of Doyle 1402 Comment
  NY791370  Astragalus andersonii A. J. Cronquist 1959-6-16 8453 Lassen 25 miles northwest of Reno Comment
  NY791371  Astragalus andersonii D. B. Dunn 1971-6-2 17802 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402.1 Comment
  UC13320  Astragalus andersonii L. T. Stephenson Sept 1897 Lassen Chat Comment
  NY791368  Astragalus andersonii M. J. Williams 1978-5-14 7848- 2 Lassen 2.8 miles south of northern road into Red Rock (off Highway 395) 1371.6 Comment
  NY791374  Astragalus andersonii LeDoux 1973-5-24 861 Lassen Collected at jct. of Highways 70 and 395 at Arco Station. Comment
  RSA59492  Astragalus anxius E. K. Balls 1950-5-19 14784 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
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Jan 3 2013
  UC1594460  Astragalus anxius Meinke and Lantz 1991-7-16 6108 Lassen ca 25 km w Madeline (along Ash Valley Rd.); Ash Valley 1550 Comment
  RSA362358  Astragalus argophyllus var. argophyllus A. Tiehm, Gary Schoolcraft 1986-5-12 10347 Lassen 1 road mile west of the state line on dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341 Comment
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Aug 12 2008
  CHSC5278  Astragalus canadensis var. brevidens 1944-6-28 Lassen Eagle Lake. 1615 Comment
  NY674058  Astragalus canadensis var. brevidens G. Schoolcraft 1988-7-7 1821 Lassen Madeline Plains north of Observation Peak and Horne Ranch Road 1646 Comment
  NY797393  Astragalus canadensis var. brevidens J. T. Howell 1934-7-8 12504 Lassen Spalding's, 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
  UC82577  Astragalus canadensis var. brevidens unknown 1892-6-20 Lassen Milford Comment
  CDA26651  Astragalus curvicarpus T. C. Fuller 1965-6-3 13607 Lassen 1.3 miles west-northwest of Janesville. 0 Comment
  RSA111041  Astragalus curvicarpus H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5676 Lassen N or Doyle. 1265 Comment
  RSA111043  Astragalus curvicarpus H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-15 5752 Lassen NE of Litchfield. 1234 Comment
  SEINET5325008  Astragalus curvicarpus F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. 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
  NY803536  Astragalus curvicarpus var. curvicarpus P. Gallian 1971-6-2 509 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402 Comment
  NY803538  Astragalus curvicarpus var. curvicarpus G. Schoolcraft 1993-6-10 2286 Lassen Along US Highway 395 near road to Clark Ranch 1280 Comment
  NY803535  Astragalus curvicarpus var. curvicarpus M. J. Williams 1973-5-12 73-C- 16 Lassen Near Herlong Turn from Highway 395 1250 Comment
  CAS-BOT-BC182954  Astragalus filipes Peter H. Raven; Otto T. Solbrig 1958-6-17 13290 Lassen Along United States Highway 395, 0.4 miles south of Ravendale Comment
  CAS-BOT-BC182958  Astragalus filipes H. D. Ripley; R. C. Barneby 1943-6-15 5759 Lassen East of Viewland 1310 Comment
  CHSC118788  Astragalus filipes L. P. Janeway; B. Castro 2015-6-5 11758 Lassen Great basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 7.4 road-km south of Surprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CHSC29935  Astragalus filipes Robin Ondricek; Robert Ediger 1978-6-6 37 Lassen 1 mi S of Colley Point Overlook on Hwy 139. 1670 Comment
  HSC100805  Astragalus filipes Lowell Ahart, John Dittes 2010-7-31 16976 Lassen 100 yd. NE of where the road crosses Hunsinger Draw, 1.9 (air) mi. NW of Moll Reservoir, 2.8 (air) mi. W of Ash Valley, and 8.4 (air) mi. SE of Adin. 1521 Comment
  JEPS95714  Astragalus filipes Vernon H. Oswald and L. Ahart 1995-6-19 6883 Lassen T30N R15E NE1/4 SE1/4 Sect. 22, 4500 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395. Erect, many-stemmed herbaceous perennial. Corolla pale cream. 1371 Comment
  RSA111097  Astragalus filipes H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-15 5459 Lassen Volcanic mesa E. of Viewland. 1311 Comment
  RSA639010  Astragalus filipes Michael A. Vincent 1999-6-9 8579 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
  CAS-BOT-BC186864  Astragalus gibbsii Doris Kildale Gillespie 1930-5-12 9348 Lassen Between Susanville and Leavitt Lake Comment
  POM26155  Astragalus gibbsii Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkins Ranch. 1463 Comment
  RSA415413  Astragalus gibbsii Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CAS-BOT-BC186868  Astragalus gibbsii E. K. Balls 1950-5-21 14825 Lassen Near Standish, Hwy 395, 7 mi. from junction of Hwys 36 and 395 1249 Comment
  RSA110069  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5692 Lassen South of Milford. 1433 Comment
  CAS-BOT-BC186916  Astragalus inversus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CHSC83623  Astragalus inversus L. P. Janeway 2001-6-28 7237 Lassen High Cascade Range. Southeast slope of Cone Mountain, 0.8 km south-southeast of the summit; along Road 33N41Y 0.2 km northwest of Road 33N41YD. 1950 Comment
  CAS-BOT-BC186943  Astragalus iodanthus Arnold Tiehm 1980-5-29 5755 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel 1231 Comment
  CAS-BOT-BC229049  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  JEPS114989  Astragalus lemmonii Lowell Ahart, John Dittes 2008-6-20 14968 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  POM45791  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  RSA0035824  Astragalus lemmonii Lowell A. Ahart, John Dittes 2008-6-20 14968 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CAS-BOT-BC187159  Astragalus lentiginosus var. floribundus Arnold Tiehm 1980-5-29 5751 Lassen North end of Honey Lake Valley, 1 mile north of Wendel 1231 Comment
  CHSC5281  Astragalus lentiginosus var. floribundus P. Collett 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  JEPS97410  Astragalus lentiginosus var. floribundus Vernon H. Oswald 1995-6-19 6903 Lassen T30N R16E NW1/4 SE1/4 Sect. 2, 4740 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 8.5 mi e of Hwy. 395 1444 Comment
  CHSC5280  Astragalus lentiginosus var. lentiginosus 1926-6-1 Lassen Buck's Point, Eagle Lake. 1615 Comment
  CHSC60900  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald 1993-7-8 5663 Lassen Pittvile Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CHSC828  Astragalus lentiginosus var. lentiginosus 1944-6-26 Lassen Eagle Lake. 1584 Comment
  CHSC7667  Astragalus lentiginosus var. platyphyllidius Beverley J. Wise 1969-5-4 56 Lassen 1.7 mi. west on Shaeffer Mtn Lookout Rd off Hwy 395 (approx. 1 mi. south of Las Co. Rd. 338). 1676 Comment
  HSC28508  Astragalus lentiginosus var. platyphyllidius D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19294 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  CHSC99125  Astragalus lentiginosus var. salinus Lowell Ahart; John Dittes 2008-6-19 14898 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  POM45991  Astragalus malacus R. M. Austin 1897-05 400 Lassen Madaline plains. Comment
  SEINET10486634  Astragalus malacus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2599 Lassen Hallalujah jct intersection of us hwy 395 & calif hwy 70; in open waste area Adjacent to artemisia tridentata community. 1433 Comment
  JEPS54791  Astragalus pulsiferae J. B. Davy June 1897 Lassen Chat Long Valley, Chat Comment
  SEINET948657  Astragalus pulsiferae John Thomas Howell 1955-1 30818 Lassen East side of Beckwourth Pass. Sierra Nevada 1494 Comment
  SEINET240400  Astragalus pulsiferae var. coronensis S. L. Welsh, ND Atwood 2001-6-14 28150 Lassen E of Hwy 395, road to Rams Horn Spring campground 1540 Comment
  NY694127  Astragalus pulsiferae var. pulsiferae See comments 1981-6-23 614 Lassen West of Susanville 1463 Comment
  NY694132  Astragalus pulsiferae var. pulsiferae M. J. Williams 1973-7-26 74-L- 16 Lassen 2 miles west of Highway 395, near Highway 70 1494 Comment
  RSA104884  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1943-6-17 5799 Lassen East side of Beckwourth Pass. 1494 Comment
  RSA111760  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1944-5-30 5967 Lassen North of Secret Valley. 1616 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
  CHSC98310  Astragalus pulsiferae var. suksdorfii R. Ondricek-Fallscheer 1999-7-14 206 Lassen 6 1/2 air mi W of Crater Mtn. and 7 1/2 air mi ENE of Lassen Volcanic Natl. Park; 0.3 road mi S of Hwy 44 on USFS Rd. 32N60. 1706 Comment
  CHSC13620  Astragalus purshii M. S. Taylor 1974-6-20 257 Lassen Ca. 400 yds n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1554 Comment
  HSC28311  Astragalus purshii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19269 Lassen Harvey Valley near Cone Springs Comment
  NY678236  Astragalus purshii var. lectulus S. L. Welsh 2001-6-14 28157 Lassen East of Highway 395, road to Rams Horn Spring campground 1539 Comment
  CHSC48504  Astragalus purshii var. purshii Vernon Oswald 1986-5-28 2052 Lassen Rd. 201 on the west side of Eagle Lake, 22.1 mi n of Hwy 36, 9.2 mi n of Gallatin Beach Road. 1615 Comment
  RSA121818  Astragalus purshii var. purshii G. A. Fischer, Irwin H. Johnson 1933-7-14 F- 249 Lassen Forest: Lassen. 1784 Comment
  CAS-BOT-BC194095  Astragalus purshii var. purshii Clare B. Hardham 1978-4-20 21588 Lassen North west edge of Susanville Comment
  RSA110893  Astragalus purshii var. purshii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-14 5741 Lassen West of Susanville. 1311 Comment
  UC1137765  Astragalus purshii var. tinctus August L. Hormay 1934-5-9 Lassen Lassen National Forest , Black's Mt Headquarters (Black's Mt. Headquarters) 1706 Comment
  SEINET12165119  Astragalus whitneyi N. H. Holmgren, Holmgren, P. K. 1980-1 9514 Lassen Observation Peak, S side of Mt. 18km airline dist. E of Ravendale. T34N R16E S33 Comment
  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
  CAS-BOT-BC200876  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susnaville. Perkin's Ranch 2225 Comment
  SEINET3025898  Astragalus whitneyi var. sonneanus Marcus E. Jones 1897-6-28 Lassen Top of Diamond Peak, Susanville. Perkin's Ranch. 2230 Comment
  CAS-BOT-BC198724  Astragalus whitneyi var. whitneyi G. Schoolcraft 1989-6-19 1915 Lassen Ash Valley RNA/ACEC 1554 Comment
  CAS-BOT-BC68710  Athyrium filix-femina var. californicum Clare B. Hardham 1971-8-22 18405 Lassen Diamond Mountain 1981 Comment
  CAS-BOT-BC17439  Athysanus pusillus George Haley 1927-4-15 s.n. Lassen Constantia. 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
  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
  UC7062  Atriplex confertifolia J. Burtt Davy Jun 17 1897-Jun 24 1897 3274 Lassen Honey Lake Valley 1219 Comment
  UCSB61625  Atriplex confertifolia True, Jr., Gordon 1936-6-24 Lassen North shore of Honey Lake, Honey Lake Valley 1219 Comment
  POM102968  Atriplex gardneri var. falcata Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UCD97425  Atriplex hortensis Daniel B. Marcum 2005-6-3 Lassen Vestal Ranch, maybe 6 miles SE of McArthur CA, Pitville, Lassen County. 1005 Comment
  JEPS1758  Balsamorhiza hookeri Milo S. Baker 1952-5-23 12432 Lassen 1/2 mi w of, along Hwy. 36 Fredonyer Pass 1752 Comment
  UC1035988  Balsamorhiza hookeri Helen K. Sharsmith 1955-6-22 4501 Lassen 5 miles beyond Blue Lake on road to Likely. Warner Mountains, Modoc National Forest Comment
  CAS-BOT-BC106493  Balsamorhiza hookeri Rhonda Riggins 1989-4-27 1635 Lassen Wash through volcanic boulder pavement, US 395, 8.4 mi N. Litchfield, 26.6 mi S Ravendale 1310 Comment
  CHSC67158  Balsamorhiza hookeri var. lanata James D. Jokerst 1994-5-2 4040 Lassen N of Wendel, E of Hwy 395 and railroad, S end of Secret Valley. Comment
  CHSC5200  Balsamorhiza sagittata 1944-7-9 Lassen Dow Butte. 2042 Comment
  SEINET10924972  Balsamorhiza sagittata Katherine L. Morris, Douglas G. LeDoux; David B. Dunn 1973-5-25 Morris 216 Lassen Collected 2.6 mi. W of Susanville, on U.S. 36, in an area of Pinus jeffreyi and Purshia. Comment
  JEPS124725 Image available Beckmannia eruciformis Virginia Hardham 1965-7-13 134 Lassen 1.4 mi. past junction As and 299 going west. 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
  SJSU4353  Beckmannia syzigachne J. W. Tilden 1960-6-27 1526 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  UCD56795  Beckmannia syzigachne R. Tofsrud 1947-7-1 247 Lassen Between Bieber and Nubieber. Comment
  UCD56798  Beckmannia syzigachne A. A. Beetle 1941-6-28 2813 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  CHSC110167  Berberis aquifolium var. aquifolium V. Lockie 2010-5-1 Lassen Location: Just off of Highway 139, east side of road, approx. 8.25 miles NE of Susanville, CA on Antelope Mountain. 1630 Comment
  CDA20547  Berteroa incana D. McDonald 2005-7-18 PDR 1307852 Lassen Modoc Plateau; Hallelujah Junction. 1478 Comment
  RSA713604  Berteroa incana A. Tiehm 2005-7-14 15023 Lassen Long Valley. Anderson (Saralegui) Ranch. 2.2 road miles W of highway 395 on Highway 70, then 5.5 road miles N on Scott Road. 1494 Comment
  SEINET3100770 Image available Berteroa incana Arnold Tiehm 2005-7-14 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road miles W of highway 395 on highway 70 then 5.5 road miles N on Scott Road. 1490 Comment
  UCR182884  Berteroa incana D. Mcdonald 2005-7-18 PDR 1307852 Lassen Modoc Plateau, Hallelujah Junction Comment
  CHSC29912  Bidens cernua Robin L. Ondricek 1978-8-26 125 Lassen Below dam at Murrers Upper Meadow. 1548 Comment
  CAS-BOT-BC413001  Bistorta bistortoides A. A. Heller 1938-6-4 15141 Lassen 2 miles east of Westwood 1402 Comment
  CAS-BOT-BC127954  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-24 3733 Lassen 2 mi. S. of Ravendale 1463 Comment
  CHSC5201  Blepharipappus scaber 1944-7-1 Lassen Eagle Lake. 1584 Comment
  RSA164426  Blepharipappus scaber Clare B. Hardham 1962-6-16 7451 Lassen Gold Run Creek south of Susanville. Comment
  SEINET11261379  Blepharipappus scaber Stanley L. Welsh, N. Duane Atwood 2001-6-14 28151 Lassen E of Hwy 395, rd to Rams Horn Spring campground.; 0 1540 Comment
  SFV3785  Blepharipappus scaber I. L. Wiggins, D. B. Wiggins 1961-6-11 16355 Lassen East of Eagle Lake, 2 miles north of Susanville. Roadside. 1340 Comment
  UC194505  Blepharipappus scaber unknown 1878-4-1 Lassen Madeline Plains Comment
  CAS-BOT-BC128031  Blepharipappus scaber Michael A. Vincent 1999-6-9 8578 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 Comment
  SEINET7379359 Image available Blepharipappus scaber subsp. scaber J. A. Young 1982-6-9 s.n. Lassen Myers Ranch, Adin 1372 Comment
  UC1542747  Boechera pendulocarpa Barbara Ertter with Gary Schoolcraft 1987-6-16 7179 Lassen ca 1 mi w Hot Springs VABM (ne side of Honey Lake); Skeedaddle Mountains 1828 Comment
  CHSC29878  Boechera pinetorum Robin Ondricek 1978-6-6 39 Lassen Along Co. Rd. 201, 2.8 mi W of jct. with Co. Rd. A1. 1569 Comment
  CHSC66379  Boechera pinetorum Vernon H. Oswald; Lowell Ahart 1996-6-17 7793 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Just SW of the parking area at Devils Corral Trailhead. 1420 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
  CAS-BOT-BC14718  Boechera repanda Clare B. Hardham 1969-8-28 17444 Lassen West of Janesville. Comment
  CHSC40526  Boechera retrofracta J. D. Jokerst 1983-5-30 1796 Lassen West of Ash Valley, along the road that leads to Know Mt. ca 1.0 mile north of the road to either Aden or Madeline. Comment
  SEINET3165698  Boechera retrofracta R. W. Spellenberg 2006-6-19 13743 Lassen along a USFS access road 2 km E of Calif. Hwy 139, the junction of road and highway 31 km SE of Modoc Co. line (just S of Adin) 1715 Comment
  CHSC60729  Boechera sparsiflora Vernon H. Oswald; Lowell Ahart 1993-6-14 5546 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). On the N side of the road. 1566 Comment
  CHSC71125  Boechera sparsiflora Vernon H. Oswald; Lowell Ahart 1998-5-22 9131 Lassen Near the summit of the dirt road in the Fort Sage Mtns. 3.5 mi east of Fort Sage Rd., ca. 6 mi NE of Doyle. 1737 Comment
  UC506904  Boechera suffrutescens George A. Fischer and Irwin H. Johnson 1933-7-14 F- 273 Lassen Lassen Forest 1722 Comment
  CAS-BOT-BC25935  Boechera suffrutescens Blanche Clear 1940-7-25 s.n. Lassen Volcanic Park. Cinder Cone. Comment
  POM253280  Boisduvalia macrantha A. A. Heller 1938-7-28 15295 Lassen About a mile east of Westwood 1524 Comment
  RSA210962  Brickellia grandiflora James Henrickson 1969-9-4 4268 Lassen 4 miles south of Westwood along Highway 147. Along dirt road into forest along small river. 1390 Comment
  CAS-BOT-BC149499  Bromus briziformis B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6572 Lassen U.S. Highway 395 1.3 km south of railroad crossing and 12. 9 km north of Litchfield. 1330 Comment
  JEPS26570  Bromus briziformis Lauramay T. Dempster 1961-6-17 1675 Lassen about 8 mi n of Karlo Road junction with Hwy 395, w of highway Karlo Road 1584 Comment
  SEINET3921578  Bromus briziformis Noel H. Holmgren, Patricia K. Holmgren 1978-6-11 8909 Lassen Vicinity of spring at fork to Painters Flat on east side of Oberservation Peak. 28 km (17.4 mi) east of Ravendale and 22.5 km (14 mi) airline distance.; 0 1680 Comment
  CAS-BOT-BC149581  Bromus carinatus var. carinatus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49457 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  UC1136817  Bromus carinatus var. carinatus George A. Fischer, Irwin H. Johnson 1933-7-12 F 231 Lassen Lassen National Forest, Patterson Flat Patterson Flat; Lassen National Forest, Patterson Flat 1737 Comment
  UC1136818  Bromus carinatus var. carinatus L. R. Short and J. Warren 1936-6-29 S 460 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1820 Comment
  CHSC23516  Bromus carinatus var. marginatus Wayne O. Baum 1971-7-5 71 -13 Lassen E. slope of Gallatin Peak. 1981 Comment
  UCD59099  Bromus carinatus var. marginatus R. Tofsrud 1947-7-1 224 Lassen Between Ravendale and Thermo. Comment
  POM264546  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  UCD58467  Bromus commutatus Beecher Crampton 1954-7-5 2056 Lassen Along Hwy. 36. 4.5 miles west of Susanville. Comment
  CHSC7690  Bromus madritensis subsp. rubens Beverley J. Wise 1969-5-23 126 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1554 Comment
  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-BC162180  Bromus orcuttianus John Thomas Howell 1976-7-19 51973 Lassen Sierra Nevada. On Gold Run Creek southwest of Susanville. 1386 Comment
  UC506916  Bromus orcuttianus George A. Fischer, Irwin H. Johnson 1933-7-14 F 261 Lassen Lassen National Forest 1783 Comment
  UC1024917  Bromus racemosus Leo Whitney 1935-6-28 3361 a Lassen Bieber Comment
  POM112560  Bromus secalinus Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC60732  Bromus secalinus M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixie Valley Comment
  CAS-BOT-BC161576  Bromus suksdorfii Clare B. Hardham 1971-8-22 18407 Lassen Diamond Mountain. Comment
  HSC79991  Bromus tectorum William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UC1024872  Bromus tectorum Leo Whitney 1935-5-26 3155 Lassen 10 mi e of Adin (Ash Creek); Ash Creek Comment
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Jun 24 2009
  UC1137124  Bromus tectorum August L. Hormay 1929-5-20 Lassen Lassen National Forest, Hat Creek Hat Creek; Lassen National Forest, Hat Creek Comment
  RSA0000410  Calamagrostis micrantha var. sierrae Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  CHSC99528  Calandrinia ciliata Lowell Ahart; John Dittes 2008-6-22 15030 Lassen On the banks of a small natural drainage, about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  JEPS114632  Calandrinia ciliata Lowell Ahart, John Dittes 2008-6-22 15030 Lassen On the banks of a small natural drainage, about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber 1262 Comment
  HSC36104  Callitriche fassettii Ken Mahouski 1973-4-29 Lassen Along Hat Creek at Hat #2 power house forebay, near Cassel. Comment
  JEPS124785 Image available Callitriche palustris M. L. Wheelis 1964-7-1 136 Lassen Loc. bridges between Bieber and New Bieber. Comment
  SEINET10531060  Calocedrus decurrens Katherine L. Morris 1973-5-25 Morris 226 Lassen Collected in an area of sugar pine, Libocedrus, and yellow pine. 2.5 mi N of Jct 36 & Hwy 44. Comment
  HSC23523  Calochortus leichtlinii R. Carter 1967-6-27 552 Lassen 10 yds. off N side of rd., 1.75 mi. W of Eagle Lake Biology Station 1585 Comment
  UC423015  Calochortus leichtlinii Franklin P. Nutting Lassen Pine Creek Comment
  CAS-BOT-BC487969  Calochortus leichtlinii A. M. Vollmer; L. Beane 1953-7-1 49 Lassen Along Halls Flat road, beginning 6 miles west of Susanville, to McArthur 1554 Comment
  UC119897  Calochortus macrocarpus T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  CHSC6233  Calyptridium umbellatum L. Harman 1946-6-23 Lassen Roop mountain. 2133 Comment
  SEINET196249  Calyptridium umbellatum F. Farris 1936-6-15 Lassen Eagle Lake Rd 1676 Comment
  UC852120  Calyptridium umbellatum A. A. Heller 1938-6-22 15139 Lassen 1 mi s of Westwood 1524 Comment
  UC773930  Calystegia occidentalis subsp. occidentalis L. R. Short and Wm. Gansberg 1936-7-3 S- 469 Lassen Lassen Forest , Lassen <National> Forest (Burgess Spring Experiment Range) 1848 Comment
  SEINET10533674  Camassia leichtlinii subsp. suksdorfii Katherine L. Morris 1973-5-25 Morris 251 Lassen 27.7 mils nw of the jct. Of hwy. 36 And 44 on hwy. 44, At robber's spring, in An open meadow on one side of the hyw wirh yellow pine, white fir and open on The other side Comment
  CAS-BOT-BC497551  Camassia quamash subsp. breviflora Elmer I. Applegate 1934-5-4 8936 Lassen Elysian Valley northwest of Janesville 1325 Comment
  SFV17867  Camassia quamash subsp. quamash J. D. Dilley 1998-7-14 367 Lassen Sierra Nevada Along CA-44, 1 mile west of Bogard Work Center; 29 miles northwest of Susanville. 1707 Comment
  CHSC64770  Camelina microcarpa Vernon H. Oswald 1995-5-31 6807 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 1.3 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  CHSC93245  Camelina microcarpa John Dittes; Scott Chamberlain 2004-6-28 1019 Lassen Modoc Plateau; Long Valley; ca. 4.4 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.6 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; near road. 1465 Comment
  UC2027336  Camelina microcarpa Anthony Baniaga 2011-6-10 321 Lassen Along Highway 395 ca. 6.6 m S of Karlo Road. quadrangle. Comment
  SEINET10480825  Camelina microcarpa David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17759 Lassen Approx 12 mi s of adin on state hwy 139, in basalt and clay; along edge of rd on rolling knoll, in artemisia-juniper assoc. 1372 Comment
  UCR201582  Camissonia Ken Osborne 2005-4-23 s.n. Lassen 6 miles SE of Honey Lake, 1 mile west of Turtle Mountain 1276 Comment
  RSA339990  Camissonia andina Noel Holmgren, Patricia K. Holmgren 1980-7-5 9521 Lassen Lassen County: upper Smoke Creek drainage, 20.4km (12.7miles) from Hwy 395 via Rye Patch Canyon, 24km (15miles) airline distance SE of Ravendale 1585 Comment
  HSC63958  Camissonia claviformis subsp. cruciformis Teresa Prendusi 1980-5-6 Lassen Honey Lake area Comment
  RSA136892  Camissonia claviformis subsp. cruciformis Peter H. Raven, Otto T. Solbrig 1958-6-17 s.n. Lassen Along Hwy 395, 19.0 miles south of Ravendale 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
  JEPS94102  Camissonia contorta Vernon H. Oswald and Lowell Ahart 1998-5-22 9098 .1 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd., 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  HSC24653  Camissonia contorta John Pratt 1970-6-14 18 Lassen Comment
  CHSC93694  Camissonia pubens Lowell Ahart; John Dittes 2005-6-2 11993 Lassen Along a small wash, east side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  JEPS94108  Camissonia pubens Vernon H. Oswald and Lowell Ahart 1998-5-22 9136 Lassen ca. 3.5 mi. n. Doyle (Fort Sage Rd. 2.3 mi. n. of Hackstaff Rd.) 1341 Comment
  HSC22874  Camissonia tanacetifolia John Pratt 1970-6-13 6 Lassen 1677 Comment
  CAS-BOT-BC160878  Camissonia tanacetifolia subsp. tanacetifolia Lassen 1927 G. S. Crew 1927-6-25 38 Lassen Lassen National Forest. Norval Flat 1747 Comment
  RSA339989  Camissonia tanacetifolia subsp. tanacetifolia Noel Holmgren, Patricia K. Holmgren 1980-7-3 9477 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi.) west of U.S. Highway 395 from a turnoff 10.3 km (6.4 mi.) south of Madeline 1616 Comment
  CAS-BOT-BC160869  Camissonia tanacetifolia subsp. tanacetifolia Peter H. Raven 1962-5-28 17876 Lassen In clayey field 0.5 miles north of Ravendale Comment
  CAS-BOT-BC160874  Camissonia tanacetifolia subsp. tanacetifolia Peter H. Raven 1962-5-28 17875 Lassen 11.6 miles north of Litchfield Comment
  RSA38463  Camissonia tanacetifolia subsp. tanacetifolia P. A. Munz 1947-5-19 11883 Lassen Madeline 1677 Comment
  UC773929  Capsella bursa-pastoris L. R. Short and J. Warren 1936-6-9 S 408 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1844 Comment
  UC10331  Cardamine breweri M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  CAS-BOT-BC37252  Cardamine breweri Louella Bass 1980-5-22 s.n. Lassen Sierra Nevada. Bagley Springs along Susan River between Devil's Corral and Susanville. Comment
  CHSC61025  Cardamine breweri var. breweri Vernon H. Oswald; Lowell Ahart 1993-8-3 5743 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. At the SW edge of the swamp. 1932 Comment
  UC1776659  Carex aquatilis var. aquatilis Jenn Atchley 1993-5-5 1 Lassen Along willow creek, in watering gap, petroglyphs. 1219 Comment
  UC2015835  Carex breweri Ron Mastrogiuseppe, Joy Mastrogiuseppe 1986-8-2 4446 Lassen Lassen Volcanic National Park. Lassen Peak. Comment
  HSC95168  Carex cusickii Gordon Leppig, J. Cromwell 1997-7-26 600 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET11309924 Image available Carex davyi D. E. Lepley 2012-1 1 Lassen On the South flank of Whaleback Mt., about 3.5 air miles NNW of Christie Campground at Eagle Lake and about 500 feet from FS21 (Road 32N02), on the Pikes Point 7.5' quad. UTM (NAD83, Garmin GPSmap 60CS): 0680730 x 4498190 at the northernmost, 0680750 x 4498124 at the southernmost. Comment
  UC2046018  Carex deflexa var. boottii Nick Otting and Dick Brainerd 2003-7-15 683 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 air miles south-southwest of Susanville. Comment
  POM80807  Carex densa Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  JEPS97368  Carex disperma Vernon H. Oswald and L. Ahart 1995-7-24 7145 Lassen T31N R7E NW1/4 NW1/4 Sec. 24, 6250 ft, High Cascade Range, Red Fir Forest. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. 1905 Comment
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Sep 24 2010
  CHSC53521  Carex douglasii L. P. Janeway 1990-7-4 3766 Lassen Bench on east side of saddle ca 0.8 mi northeast of Meadoview Peak. 1981 Comment
  HSC48336  Carex douglasii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19246 Lassen 2 mi. N of Westwood 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
  RSA275382  Carex douglasii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19245 Lassen About 2 miles north of Westwood. Comment
  UC1736284  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
  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
  HSC95229  Carex echinata subsp. echinata Gordon Leppig, Tony LaBanca 1997-6-28 517 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS118277  Carex filifolia var. erostrata Lowell Ahart, John Dittes 2011-6-20 17501 Lassen About 40 yards west of the stream, about 50 yards northwest 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
  SEINET7558593 Image available Carex filifolia var. erostrata L. P. Janeway 2004-6-26 8162 Lassen High Cascade Range. At Patterson Well in Patterson Flats. Blacks Mountain Experimental Forest. Poison Lake 7.5' quad. 1767 Comment
  UC1609197  Carex filifolia var. erostrata Vernon H. Oswald and Lowell Ahart 1993-6-3 5472 Lassen Champs Flat Rd (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy. 44 (between Poison Lake and Susanville) 1725 Comment
  CAS-BOT-BC21305  Carex fracta John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49451 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  SEINET7559362 Image available Carex fracta Barbara L. Wilson, Richard Brainerd, Bruce Newhouse 2004-8-28 11194 Lassen Near Bluff Falls in the Lassen National Forest, approximately 0.7 air mile south of the south boundary of Lassen Volcanic National Park on Highway 89. 1981 Comment
  JEPS28342  Carex heteroneura George W. Gillett 1957-7-21 865 Lassen 300 yds. n trail summit (Juniper Lake - Cameron Meadow trail); Lassen Volcanic National Park 2118 Comment
  CHSC85990  Carex heteroneura var. heteroneura L. P. Janeway 2003-7-24 7915 A Lassen High Cascade Range. Along Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  SEINET7561726 Image available Carex hoodii L. P. Janeway 2003-7-24 7917 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14. 1.1 km from Road 30N21, small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  HSC48181  Carex integra D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19239 Lassen 2 mi. N of Westwood Comment
  SEINET7562451 Image available Carex integra L. P. Janeway 2003-7-24 7916 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14 1.1 km from Road 30N21. Drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 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
  HSC103673  Carex lenticularis var. lipocarpa Thomas W. Nelson, Jane Nelson 1985-8-10 8023 Lassen Margin of pond along south side of lava flow on west side of Silver Lake 1829 Comment
  CHSC96450  Carex limosa Gordon Leppig; T. LaBanca, L. Arguello 1997-6-29 543 Lassen Modoc National Forest. Blue Lake Ranch. 1970 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
  HSC48180  Carex multicostata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19240 Lassen 2 mi. N of Westwood Comment
  CHSC25910  Carex nebrascensis K. R. Stern 1967-6-25 2429 Lassen Road to Eagle Lake Biological Station, Dean's Meadow near Gallatin Peak, ca. 3 mi. S of Eagle Lake. 1676 Comment
  CHSC85989  Carex nebrascensis L. P. Janeway 2003-7-24 7914 Lassen High Cascade Range. At lower end of a meadow and marsh along Bridge Creek 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  CHSC85991  Carex nebrascensis L. P. Janeway 2003-7-24 7913 Lassen High Cascade Range. At lower end of a meadow and marsh along Bridge Creek 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  CHSC96455  Carex nebrascensis Gordon Leppig 1998-8-17 1053 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  RSA755319  Carex nebrascensis L. Ahart, John Dittes 2008-6-22 15019 Lassen On the north side of the levee, about 90 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 air miles northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 air miles northeast of Bieber. 1261 Comment
  CAS-BOT-BC119714  Carex nervina Clare B. Hardham 1971-8-22 18405 Lassen Diamond Mountain. 2133 Comment
  SEINET7484007 Image available Carex pachycarpa W. W. Eggleston 1927-1 21485 Lassen Bogard Ranger Station, Lassen Forest. 1500 Comment
  CAS-BOT-BC119043  Carex pellita George Wilson Gillett 1957-7-26 906 Lassen East Shore of Butte Lake, along water line. 1844 Comment
  SEINET7571315 Image available Carex petasata L. P. Janeway 2004-6-26 8153 Lassen Poison Lake 7.5' quad, High Cascade Range, about 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  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
  CAS-BOT-BC119055  Carex phaeocephala Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16326 Lassen Sedgy meadow along southern shore of Eagle Lake. Comment
  SEINET7572132 Image available Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11864 Lassen On west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  CAS-BOT-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
  SEINET7573104 Image available Carex raynoldsii George W. Gillett 1957-7-29 948 Lassen Lassen Volcanic National Park, along trail between Butte Lake and Snag Lake. 1859 Comment
  HSC48338  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19244 Lassen 2 mi. N of Westwood Comment
  CAS-BOT-BC117702  Carex simulata Peter H. Raven; Otto Thomas Solbrig 1958-6-17 13278 Lassen Near a spring, along US HWY 395, 13.1 mi S of Ravendale. Comment
  CHSC96453  Carex simulata Gordon Leppig; J. Cromwell 1997-7-27 619 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  SEINET7577165 Image available Carex subfusca L. P. Janeway 2003-7-24 7915 Lassen Swain Mountain 7.5' Quad. High Cascade Range. Moist-springy spot along Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  CAS-BOT-BC116611  Carex subfusca Hans Leschke 1954-7-5 s.n. Lassen Hat Lake 1965 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
  CAS-BOT-BC115284  Carex utriculata George Wilson Gillett 1957-7-22 885 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. Comment
  CHSC76792  Carex utriculata L. P. Janeway 1999-9-5 6580 Lassen High Cascade Range. Upper Pine Creek near Stephens Camp; northwest corner of Upper Stephens Meadow. 1900 Comment
  CAS-BOT-BC115062  Carex vesicaria George Wilson Gillett 1957-7-22 879 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. 1850 Comment
  HSC95272  Carex vesicaria Gordon Leppig, Kai Neander, Juli Neander 1997-7-26 695 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1142938  Carex vesicaria A. L. Hormay 1941-6-18 1 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  CHSC93566  Castilleja angustifolia Lowell Ahart; John Dittes 2005-6-2 11941 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. 1601 Comment
  UC585181  Castilleja angustifolia E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1759 Lassen e of Red Rock (nw side of summit of ridge) 1828 Comment
  CAS-BOT-BC249341  Castilleja applegatei Gary Schoolcraft 1983-6-29 1044 Lassen Ash Valley 1554 Comment
  CAS-BOT-BC249610  Castilleja applegatei subsp. pinetorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49170 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC249616  Castilleja applegatei subsp. pinetorum Doris Kildale Gillespie 1930-5-13 9367 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC249617  Castilleja applegatei subsp. pinetorum Alice Eastwood; John Thomas Howell 1940-6-15 8326 Lassen Grasshopper Valley Comment
  CAS-BOT-BC249623  Castilleja applegatei subsp. pinetorum John Thomas Howell 1934-7-10 12556 Lassen Black's Mt. Comment
  UC1063044  Castilleja applegatei subsp. pinetorum K. E. Bradshaw 1939-5-27 238 Lassen n end Black Mountain Experimental Forest (Plot 39-1); Lassen National Forest, Halls Flat Quad. 1767 Comment
  UC199389  Castilleja applegatei subsp. pinetorum Milo S. Baker Lassen Dixie Mountains Comment
  UCD170229  Castilleja applegatei subsp. pinetorum K. M. Meyer; A. Townesmith 2007-7-23 152 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
  CHSC65124  Castilleja arachnoidea Vernon H. Oswald; Lowell Ahart 1995-7-24 7134 Lassen N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W od Upper Stephens Medws., just S of Pine Creek. 1950 Comment
  RSA428370B  Castilleja arachnoidea Christopher Davidson 1974-7-25 2500 Lassen Lassen Volcanic nat. Park, at Juniper Lake. 2134 Comment
  CHSC99527  Castilleja campestris subsp. campestris Lowell Ahart; John Dittes 2008-6-20 14978 Lassen Edge of vernal pools, about 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS87488  Castilleja campestris subsp. campestris Vernon H. Oswald and Lowell Ahart 1993-7-8 5644 Lassen near se end Poison Lake (0.4 mi n of Highway 44, Pittville Rd (Lassen 111,36N01), near its intersection with 33N11); near se end Poison Lake 1709 Comment
  UC1484795  Castilleja campestris subsp. campestris Noel H. Holmgren and Patricia K. Holmgren 1978-6-10 8903 Lassen 9 mi ene Termo (and 8 air distance); Madeline Plains, Coyote Flat 1630 Comment
  UC604559  Castilleja campestris subsp. campestris C. W. Sharsmith 1938-7-18 3631 Lassen 2 mi s Madeline; Madeline Plains Comment
  UC725999  Castilleja campestris subsp. campestris A. A. Heller 1938-6-23 15218 Lassen between Termo and Madeline (along U.S. Hwy 395) 1615 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
  CHSC23901  Castilleja lacera A. W. Harvilik 1967-7-8 39 Lassen Collected in Murrer's Meadow ca. 3 mi se of Eagle Lake Biological Station. 1524 Comment
  JEPS126522  Castilleja lacera Lowell Ahart, John Dittes 2016-6-7 20993 Lassen West of pond, 110 yards east of the 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
  JEPS80683  Castilleja lacera L. R. Heckard and T. I. Chuang 1981-6-10 5534 Lassen about 0.5 mi w Almanor Inn (or n road to Route 89) 1371 Comment
  JEPS81867  Castilleja lacera L. R. Heckard with J. C. Hickman 1982-5-11 5841 Lassen about 2.5 mi w Paynes Creek (along Highway 36 to Mt Lassen (6.5 mi ne of Dales)) 518 Comment
  JEPS79153  Castilleja lemmonii L. R. Heckard with R. Bacigalupi 1980-6-12 5260 Lassen ne Westwood (near golf course) 1554 Comment
  HSC69066  Castilleja linariifolia Gary Schoolcraft 1979-7-5 124 Lassen Near top of Observation Peak 2134 Comment
  CAS-BOT-BC244886  Castilleja miniata Louella Bass 1973-6-17 116 Lassen Elysian Valley. Plants of the Sierra Nevada 1325 Comment
  SEINET14062605  Castilleja miniata C. G. Gulling 1905-1 1568 Lassen Big Meadows. Comment
  CAS-BOT-BC244887  Castilleja miniata Alice Eastwood 1912-8-22 1784 Lassen trail from Morgans Springs to Sulphur Works. Lassen Butte Region. Comment
  CAS-BOT-BC244891  Castilleja miniata anonymous 1927-7-1 40 Lassen Bogard R. S. pasture 1712 Comment
  CHSC68768  Castilleja pilosa Vernon H. Oswald; Lowell Ahart 1997-5-27 8489 Lassen East side of Hwy. 139 at a small farm pond 38.2 mi north of Susanville, 7.4 mi north of Eagle Lake Rd. 1627 Comment
  CHSC99291  Castilleja pilosa Lowell Ahart; John Dittes 2008-6-20 14947 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS76162  Castilleja pilosa T. I. Chuang with Fei-Mei Chuang 1977-7-25 7661 Lassen 17.6 mi w Madeline 1600 Comment
  CHSC64896  Castilleja tenuis Vernon Oswald 1995-6-26 6922 Lassen Modoc Plateau, Northern Juniper Woodland. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  RSA0035396  Castilleja tenuis Lowell Ahart, John Dittes 2008-6-20 14944 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  RSA0059451  Castilleja tenuis Lowell Ahart, John Dittes 2011-6-20 17499 Lassen About 15 yards west of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CAS-BOT-BC39554  Caulanthus major G. Schoolcraft 1981-7-7 591 Lassen Northwest of Susanville Peak. 2011 Comment
  CHSC115601  Caulanthus major var. nevadensis Lowell Ahart; John Dittes 2015-7-14 30329 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters of Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  SEINET196483  Ceanothus cordulatus C. B. Heisser 1947-7-13 s.n. Lassen Near Westwood 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
  CAS-BOT-BC49258  Ceanothus cuneatus Alice Eastwood; John Thomas Howell 1940-6-11 7993 Lassen Big Valley Mts. Comment
  CAS-BOT-BC52048  Ceanothus prostratus John Thomas Howell 1976-7-19 51982 Lassen on Gold Run Creek Southwest of Susanville 1386 Comment
  CAS-BOT-BC52055  Ceanothus prostratus Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16317 Lassen 2 miles E of Plumas-Lassen County line, along California Highway 36, near Westwood 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
  JEPS103176  Ceanothus prostratus G. Schoolcraft 2000-4-25 2890 Lassen 3.5 mi N of Susanville along Hwy 139 1402 Comment
  UC1281295  Ceanothus prostratus H. E. McMinn 1941-8-27 5402 Lassen 3.5 mi from Pine Cone Inn (5 mi from Newbieber [Neubieber?]); 5 mi from Neubeiber Comment
  UC1736108  Ceanothus prostratus var. prostratus Dean W. Taylor 1974-7-13 4067 Lassen Lassen National Forest, Thousand Lakes Wilderness, vicinity of Magee Pk, T33N R3E SE1/4 Sect. 27 2484 Comment
  SEINET10690337  Ceanothus velutinus var. velutinus Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 153 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  UCR57551  Centaurea maculosa R. D. Goeden, Don W. Ricker 1989-8-22 890822- 8 Lassen Hwy 395 and Herlong Access Rd 1259 Comment
  UCR67437  Centaurea solstitialis George K. Helmkamp 1990-9-23 D- 4 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  CDA7341  Centaurea squarrosa Loring White Jul 1950 Lassen Kramer Ranch, Big Valley, just over line Modoc-Lassen. 0 Comment
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May 19 2009
  CAS-BOT-BC281208  Centaurea stoebe subsp. micranthos Lee E. Wheeler 1962-8-15 s.n. Lassen Doyle area Comment
  UCD130110  Centaurea stoebe subsp. micranthos T. C. Fuller 1962-8-28 9472 Lassen west side of Hwy 395, 1.7 miles south of Doyle. Comment
  HSC23531  Ceratophyllum demersum R. Carter 1967-7-13 593 Lassen 5 mi. E of Eagle Lake Biology Station at point where road comes nearest to Willow Creek 1561 Comment
  UC1523792  Cercis occidentalis Gary Schoolcraft 1981-6-9 447 Lassen w Nubieber 1280 Comment
  JEPS127358  Cercocarpus ledifolius var. intermontanus Alia Johnson, Jillian Sarazen 2016-8-24 CA 350 -79 Lassen 139 N. Right turn on load leading to Fredonyer Mountain. Comment
  CHSC12418  Cercocarpus ledifolius var. ledifolius Anne Linda Brisk 1969-6-19 5 Lassen 1/4 mi NE of ELBS. 1554 Comment
  CHSC21174  Cercocarpus ledifolius var. ledifolius M. S. Taylor 1974-5-4 226 Lassen Scattered on e side of marsh, ca. 1/2 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  CHSC29948  Cercocarpus ledifolius var. ledifolius Robin L. Ondricek 1978-6-8 45 Lassen Ridge E of Lower Dry Lake. 1767 Comment
  CAS-BOT-BC276618  Chaenactis douglasii var. douglasii John Thomas Howell 1934-7-8 12497 Lassen Spalding's Eagle Lake Comment
  CHSC111255  Chaenactis douglasii var. douglasii L. P. Janeway; B. Castro 2012-7-3 10938 Lassen Modoc Plateau. Near top of Shaffer Mountain, southeast-facing slope, steep and very rocky with lots of outcrops of hard dark volcanic rock. 2012 Comment
  CHSC48134  Chaenactis douglasii var. douglasii Vernon Oswald 1986-6-15 2116 Lassen Hwy 139, 8.6 mi ne of Susanville. 1615 Comment
  JEPS19806  Chaenactis douglasii var. douglasii Rimo Bacigalupi with S. Galen Smith 1957-6-28 6012 Lassen ne of Karlo (along U.S. Highway 395, near headwaters of Secret Creek, n of Secret Valley and w of Rye Patch Canyon); Secret Creek 1615 Comment
  JEPS30488  Chaenactis douglasii var. douglasii Peter H. Raven with Otto T. Solbrig 1958-6-17 13291 Lassen 0.4 mi s of Ravendale (along U.S. Highway 395) Comment
  SBBG72342  Chamaebatiaria millefolium S. W. Hutchinson -Jun-1925 949 Lassen Eagle Lake 1554 Comment
  HSC29997  Chamaesaracha nana D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19160 Lassen 3 mi. N of Westwood Comment
  CDA43001  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart, John Dittes 2008-6-2 14913 Lassen Where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. Comment
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Oct 5 2019
  CHSC76100  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; Vernon H. Oswald 1999-9-13 8234 Lassen On the west side of Highway 139, near the south end of Eagle Lake and the highway, Eagle Lake. 1554 Comment
  UC1924223  Chamaesyce serpyllifolia var. serpyllifolia Debra Valov 2004-6-8 2004251 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  HSC991  Cheilanthes gracillima H. E. Parks, S. T. Parks Jun 1928 262 Lassen Mt. Lassen National Park, Drakesbad 2134 Comment
  CAS-BOT-BC426342  Chenopodium John Thomas Howell 1975-7-23 51389 Lassen Susanville, south edge of town on highway to Janesville 1295 Comment
  CHSC65306  Chenopodium album Vernon H. Oswald; Lowell Ahart 1995-8-14 7180 Lassen Modoc Plateau. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  JEPS95746  Chenopodium album Vernon H. Oswald and L. Ahart 1995-8-14 7180 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville 1348 Comment
  UC1191354  Chenopodium berlandieri Verne Grant and Irving Schneider 1947-7-31 8216 Lassen George Williams section 19 Madeline Plain (nw quarter) Comment
  UC1949078  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen ca 3/4 mi ENE of Beckwourth Pass Comment
  RSA756362  Chenopodium hians Barbara Ertter 1988-7-25 7871 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2226 Comment
  JEPS95912  Chenopodium rubrum var. humile Lowell Ahart 1999-9-13 8215 Lassen about 150 yards southwest of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  CAS-BOT-BC451355  Chimaphila menziesii Clare B. Hardham 1971-8-22 18388 Lassen Diamond Mountain: North slopes 2133 Comment
  CAS-BOT-BC39671  Chorispora tenella William Anderson 1963-5-7 s.n. Lassen Milford. Comment
  CHSC23506  Chrysolepis sempervirens Wayne O. Baum 1971-7-8 71 -64 Lassen E. slope of Gallatin Peak. 1920 Comment
  CAS-BOT-BC106022  Chrysothamnus humilis R. K. Gierisch; D. H. Esplin 1969-8-27 3600 Lassen Lassen Forest 1706 Comment
  CAS-BOT-BC140658  Chrysothamnus humilis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50663 Lassen Summit ridge of Diamond Mt. 2346 Comment
  POM212177  Chrysothamnus nauseosus subsp. consimilis C. B. Wolf 1931-9-4 2397 Lassen Big Valley, 2.6 miles form Bieber on the road to Alturas 1268 Comment
  RSA188911  Chrysothamnus nauseosus subsp. consimilis Delzie Demaree 1959-8-18 41519 Lassen P.O. Termo. 1616 Comment
  SJSU3013  Chrysothamnus viscidiflorus J. W. Tilden 1967-8-23 1772 Lassen Litchfield, southeastern Lassen County 1402 Comment
  UC1483877  Chrysothamnus viscidiflorus subsp. lanceolatus G. Schoolcraft 1979-8-23 182 Lassen Painter Flat Comment
  CAS-BOT-BC100756  Chrysothamnus viscidiflorus subsp. puberulus G. Schoolcraft 1999-7-28 2872 Lassen Ridge on east end of Skedaddle Mtns. 2133 Comment
  CAS-BOT-BC100757  Chrysothamnus viscidiflorus subsp. puberulus Ralph K. Gierisch 1968-7-11 3349 Lassen Lassen National Forest, Harvey Valley 1676 Comment
  CHSC77190  Chrysothamnus viscidiflorus subsp. puberulus G. Schoolcraft 1999-7-28 Lassen Ridge on east end of Skedaddle Mtns. 2133 Comment
  CAS-BOT-BC105904  Chrysothamnus viscidiflorus subsp. viscidiflorus Elmer I. Applegate 1897-6-3 858 Lassen South end of Madeline Plains Comment
  CAS-BOT-BC105908  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
  CHSC42146  Chrysothamnus viscidiflorus subsp. viscidiflorus C. E. Laver 1985-8-14 Lassen Ca. 8.5 mi se of Madeline and 9 mi ne of Termo. Along roadsides. 2194 Comment
  CHSC65296  Chrysothamnus viscidiflorus subsp. viscidiflorus Vernon H. Oswald 1995-8-14 7183 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. Roadside. 1645 Comment
  JEPS97319  Chrysothamnus viscidiflorus subsp. viscidiflorus Vernon H. Oswald and L. Ahart 1995-8-14 7183 Lassen T33N R14E NE1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. Shrub to ca. 5 dm tall growing at roadside. Leaves spirally twisted. 1645 Comment
  RSA22626  Chrysothamnus viscidiflorus subsp. viscidiflorus Mary DeDecker 1955-8-25 263 Lassen Honey Lake: Highway 395. Comment
  SEINET5727104 Image available Chrysothamnus viscidiflorus subsp. viscidiflorus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7713 Lassen Collected along Forest Road 37N11, off CA Hwy 139.; Modoc National Forest 1555 Comment
  CDA38207  Cicuta douglasii T. C. Fuller 1965-8-26 14041 Lassen North side of old highway to Johnstonville, 5 miles east of Susanville. 0 Comment
  UCD59781  Cinna latifolia John Thomas Howell; G. H. True 1973-8-1 50346 Lassen Gold Run Creek road south of Susanville, Diamond Range. 1950 Comment
  UC1037245  Cirsium andersonii Leo Whitney 1933-8-8 1994 Lassen near Poison lake, ca 23 m w (of Eagle Lake) Eagle Lake; Poison Lake 1828 Comment
  UC1136774  Cirsium andersonii L. R. Short and D. Gish 1936-7-15 S- 489 Lassen Burgess Spr. Exp. Range Lassen Forest 1825 Comment
  CDA1125  Cirsium canescens T. C. Fuller 1962-8-28 9479 Lassen 0.25 mi n. of Termo, Madelaine Plains; roadside, Hwy 395 to Madelaine. 0 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
  RSA0070594  Cirsium cymosum Arnold Tiehm, Raymond Evans, James Young 1984-6-7 8596 Lassen Flats on the northwest side of Shaffer Mountain, 9 air miles north-northwest of Litchfield. 1387 Comment
  CDA1257  Cirsium inamoenum T. C. Fuller 1959-7-7 2739 Lassen Rocky hillside by Hwy 395, 6 mi N/ road to Karlo. 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
  JEPS59280  Cirsium occidentale var. candidissimum W. L. Jepson 1918-8-2 7796 Lassen Honey Lake Valley 1219 Comment
  CAS-BOT-BC285579  Cirsium occidentale var. candidissimum John Thomas Howell 1934-7-11 12563 Lassen Eldridge, 10 miles se. of Fall River Mills Comment
  CDA1491  Cirsium ochrocentrum G. D. Barbe 1982-7-12 3878 Lassen Madeline Plain. 3 mi. north of Termo-Grasshopper Rd., on Westside Rd. at base of Dry Valley Ridge. 0 Comment
  CDA1526  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14980 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CDA1528  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14983 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  RSA186825  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14982 Lassen East of road at the east base of Dry Valley Ridge, Madelaine Plains, 3 miles north of paved road, 10 miles west of Termo. Comment
  CDA32840  Cirsium ochrocentrum CDFA Staff 1985-6-3 Lassen Madelaine Plains 0 Comment
  CDA37705  Cirsium ochrocentrum Robin Breckenridge 2006-8-15 s.n. Lassen Madeline Plains, Westside Road, old Basque homestead. 0 Comment
  CDA1520  Cirsium ochrocentrum var. ochrocentrum T. C. Fuller 1966-7-22 14980 Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CAS-BOT-BC286309  Cirsium scariosum Louella Bass 1973-6-17 117 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC286310  Cirsium scariosum James Jokerst 1983-7-25 1894 Lassen Near Madeline Plains 1614 Comment
  RSA504590  Cirsium scariosum Bruce Bartholomew 1988-6-25 4370 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  CDA1560  Cirsium scariosum var. americanum T. C. Fuller 1959-7-6 2979 -A Lassen Hwy. 36, about 1 mi. north of Westwood. (Probably in Sec. 4 or Sec. 5) 0 Comment
  OBI54125  Cirsium scariosum var. americanum David J. Keil, Kathleen Keil 1992-7-25 23609 Lassen Along Hwy 36, 9.1 mi E of Plumas County line, W of Susanville Comment
  CDA37870  Cirsium undulatum J. L. Johnson 1980-7-9 s.n. Lassen Madeline Plains. 0 Comment
  CAS-BOT-BC285730  Cirsium vulgare John Thomas Howell; Gordon H. True 1973-8-1 50160 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC169804  Cistanthe rosea H. D. Ripley; R. C. Barneby 1943-6-18 5464 Lassen Smoke Creek, NE of Viewland 1402 Comment
  JEPS88247  Clarkia gracilis subsp. gracilis Vernon H. Oswald and Lowell Ahart 1996-6-17 7792 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead off Hwy. 36, just sw of parking area at Devils Corral Trailhead); Modoc Plateau 1420 Comment
  CAS-BOT-BC123818  Clarkia lassenensis Alice Eastwood; John Thomas Howell 1940-6-11 7983 Lassen Big Valley Mts. Comment
  CAS-BOT-BC163164  Clarkia lassenensis A. M. Vollmer; L. Beane 1953-7-1 98 Lassen Along Halls Flat road, beginning 6 mi. W of Susanville to McArthur 1554 Comment
  CHSC91195  Clarkia lassenensis Lowell Ahart; John Dittes 2005-6-2 11951 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  UC930759  Clarkia lassenensis C. L. Hitchcock 1940-5-26 6610 Lassen ca. 12 mi n Fall River Mills; Fall River 1371 Comment
  OBI76916  Claytonia rubra subsp. rubra Anthony Baniaga 2011-6-7 315 Lassen Lassen Natl Forest. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad 1747 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
  NY222826  Cleome platycarpa G. Schoolcraft 1989-5-31 1891 Lassen East end of Skedaddle Mtns. near stateline. Comment
  UC725411  Cleome platycarpa A. A. Heller 1938-6-23 15207 Lassen n of Mapes (on U.S. Highway 395) 1371 Comment
  NY222741  Cleome platycarpa D. W. McNeal 1978-5-30 2123 Lassen Along Hwy. #395, 3.4 mi. N of the jct of Co. Hwy. #320 (Wendel Rd.) at the Nobel Emigrant Trail Historical Marker. Comment
  UCD150400  Cleomella plocasperma Harry A. George and F. K. 1957-8-15 s.n. Lassen Honey Lake Wildlife Area, Dakin Unit. Comment
  CHSC35898  Collinsia parviflora M. S. Taylor 1982-5-7 4427 Lassen Reno Junction on Hwy 70 just e of Beckwourth Pass. 1524 Comment
  RSA0035917  Collinsia parviflora Lowell A. Ahart, John Dittes 2008-6-20 14916 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
  RSA0117250  Collinsia parviflora L. Ahart, John Dittes 2005-6-1 11858 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  SEINET10548283  Collinsia parviflora Jeffrey Huber 1971-6-2 Huber 127 Lassen Approx 30 mi n of susanville, on calif hwy 139, in basalt, pinus artemesia Juniper assoc. 1646 Comment
  CHSC5903  Collinsia torreyi M. West 1946-6-24 Lassen Dow Butte Road. Eagle Lake. 1828 Comment
  CHSC4774  Collomia grandiflora R. Carter 1967-6-27 565 Lassen Ca. 10 yds off S side of Rd. 1.75 mi W of Eagle Lake Biology Station. 1584 Comment
  RSA0020052  Collomia grandiflora Anthony Baniaga 2011-7-5 419 Lassen Lassen National Forest. E. of Willard Creek. 1487 Comment
  SBBG58193  Collomia grandiflora E. Rockwell -Jun-1925 802 Lassen Eagle Lake 1554 Comment
  UC1137724  Collomia grandiflora L. R. Short and J. Warren 1936-1 S- 362 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1844 Comment
  HSC23534  Collomia grandiflora R. Carter 1967-7-13 585 Lassen S side of rd. to Eagle Lake Biology Station and Willow Creek 1585 Comment
  SEINET12319536  Collomia grandiflora N. E. Heiken 1978-1 87 Lassen Lower Dry Lakes, E of Eagle L 1573 Comment
  UC1137780  Collomia tinctoria August L. Hormay 1934-6-30 Lassen Harvey Mtn. Lassen Forest and Range Experiment Station/National Forest 2133 Comment
  UC1601297  Collomia tinctoria Franklin P. Nutting Lassen Pine Creek Comment
  UC1924220  Convolvulus arvensis Debra Valov 2004-6-8 2004255 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  JEPS124870 Image available Convolvulus arvensis Laurel Loeblich 1964-6-30 56 -2 Lassen 3 miles north of Hallelujah Junction (highways 40 and 395) on 395. Great Basin flora; pinion pine - juniper- sagebrush. Comment
  CHSC6277  Corallorhiza maculata A. Santos 1946-7-11 Lassen Silver Lake. 1981 Comment
  UC1483856  Corallorhiza maculata G. Schoolcraft 1980-7-15 308 Lassen w Bieber; Big Valley Mountain timber sale area (Bureau of Land Managem 1798 Comment
  CAS-BOT-BC212206  Cornus sericea Philip A. Munz 1947-5-20 11887 Lassen Laufman Forestry Public Camp Ground above Milford 1524 Comment
  CAS-BOT-BC212207  Cornus sericea Philip A. Munz 1947-5-20 11887 Lassen Laufman Forestry Public Camp Ground above Milford 1524 Comment
  CHSC27664  Crepis acuminata Robert A. Schlising 1978-7-15 3317 Lassen SE of Eagle Lake at Dry Lake. 1645 Comment
  CHSC93564  Crepis acuminata Lowell Ahart; John Dittes 2005-6-2 11933 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  JEPS126487  Crepis acuminata Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-18 CA 350 -040 Lassen Turn right at sign for Ravendale on 395, and follow Horse Lake Road past the ranch house and around the dried up lake for about 17 miles. Comment
  POM17703  Crepis acuminata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA716340  Crepis acuminata L. Ahart, John Dittes 2005-6-2 11933 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
  CHSC29884  Crepis bakeri Robin L. Ondricek 1978-7-15 98 Lassen On the ne and nw sides of Lower Dry Lake in the area where the trees begin. 1645 Comment
  CAS-BOT-BC291552  Crepis intermedia G. L. Stebbins; J. A. Jenkins 1937-7-10 2297 Lassen Crest of range head of Stony Ridge west of Milford 1950 Comment
  JEPS107848  Crepis intermedia Lowell Ahart, John Dittes 2005-6-1 11918 Lassen Long Valley, on the east side of a poor dirt road, about 4 1/2 miles (air) north of the interesection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  CAS-BOT-BC291547  Crepis intermedia Margaret Williams 1974-8-4 74 -L-76 Lassen Near Hallelujah Junction west of Hwy 395 and south of Hwy 70, Sierra Nevada 1493 Comment
  UC581246  Crepis modocensis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2298 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  SD87658  Crepis monticola Frank W. Peirson 1926-6-22 6829 Lassen Lassen National Park Comment
  UC1924597  Crepis occidentalis Debra Valov 2006-5-28 2006007 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1305 Comment
  UC540867  Crepis occidentalis David D. Keck and J. Clausen 1935-6-24 3752 Lassen 2 mi s Ravendale 1463 Comment
  UC581277  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2319 Lassen about a mi below summit; Black Mountain 1940 Comment
  UC1609227  Crepis occidentalis subsp. conjuncta Vernon H. Oswald and Lowell Ahart 1993-6-28 5606 Lassen Rd 35N04 n Hwy 44 (nw edge of valley, ne of Poison Lake); Harvey Valley, Aspen Well 1725 Comment
  UC581317  Crepis occidentalis subsp. costata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2218 Lassen 6 mi s Ravensdale 1676 Comment
  CAS-BOT-BC290749  Crepis occidentalis subsp. occidentalis G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-8 2218 Lassen Six miles south of Ravensdale 1676 Comment
  CHSC105239  Crepis occidentalis subsp. pumila Lowell Ahart; John Dittes 2010-7-31 16982 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  HSC81647  Crepis occidentalis subsp. pumila Thomas W. Nelson, Jane P. Nelson 1980-7-6 6031 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
  POM230953  Crepis occidentalis subsp. pumila G. Ledyard Stebbins, J. A. Jenkins 1937-7-15 2359 Lassen West side of Big Valley Mountain on Highway 1220 Comment
  UC1137698  Crepis occidentalis subsp. pumila A. Simontacchi 1940-6-11 845 Lassen 3.1 mi wsw Patterson Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC290824  Crepis occidentalis subsp. pumila David D. Keck; J. Clausen 1935-6-25 3759 Lassen Susanville 1340 Comment
  CHSC76103  Crypsis schoenoides Lowell Ahart; Vernon H. Oswald 1999-9-13 8216 Lassen In a field, about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  JEPS94076  Crypsis schoenoides Vernon H. Oswald and Lowell Ahart 1998-9-8 9577 Lassen Hwy. 299 at R.R. overpass on e. side of Nubieber (depression near hwy.) 1255 Comment
  CHSC23441  Cryptantha K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5840 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  CHSC29917  Cryptantha affinis Robin L. Ondricek 1978-7-22 108 Lassen 1977 Burn area, 1.8 mi e of Coleman Rd. on Lassen Co. Road A1. 1950 Comment
  UC526167  Cryptantha affinis John Thomas Howell 1934-7-10 12545 Lassen Long's Well Comment
  UC726048  Cryptantha ambigua A. A. Heller 1938-6-23 15206 Lassen e of Mapes (on U.S. Highway 395) 1371 Comment
  UC699733  Cryptantha circumscissa Farris Farris 1936-6-5 Lassen Airport, Susanville Susanville 1280 Comment
  UCD54568  Cryptantha circumscissa Ellen Dean; Dawn Cunningham 2005-10-25 2751 Lassen East of the town of Susanville. Property N of California Correctional Facility. 1248 Comment
  UCD55289  Cryptantha flaccida Ellen Dean; Gary Schoolcraft 2006-5-16 3110 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. 1260 Comment
  JEPS124571 Image available Cryptantha intermedia var. grandiflora 1964-7-1 67 Lassen Collected 17.6 mi. north of Susanville on highway 139 near ditch. about 4 meters on west side of road from pavement. 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
  JEPS107799  Cryptantha pterocarya var. pterocarya Lowell Ahart, John Dittes 2005-6-2 11982 Lassen North side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1410 Comment
  CHSC106073  Cryptantha torreyana Lowell Ahart; John Dittes 2010-7-31 17028 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
  CHSC92722  Cryptantha torreyana L. P. Janeway 2005-7-3 8449 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  POM72225  Cryptantha torreyana Marcus E. Jones 1897-6-25 7103 Lassen Susanville. 1341 Comment
  POM72228  Cryptantha torreyana Marcus E. Jones 1897-6-19 6862 Lassen Chat 1616 Comment
  JEPS107447  Cryptantha watsonii Lowell Ahart, John Dittes 2005-6-1 11892 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
  UC1584020  Cryptantha watsonii G. Schoolcraft 1990-6-12 2089 Lassen about 17 mi e Ravendale (in Pine Dunes RNA) 1706 Comment
  CHSC23497  Cuscuta Wayne O. Baum 1971-7-14 71 -63 Lassen Gallatin Peak. 2011 Comment
  UC473500  Cycladenia humilis var. humilis A. N. Kramer 1930-1 15 Lassen Prospect Peak Lassen National Park Comment
  CHSC43469  Cynoglossum occidentale Lowell Ahart; John Thomas Howell 1974-7-9 515 Lassen Along the edge of Eagle Lake Road, about 5 miles north-west of Susanville. 1584 Comment
  UC569547  Cyperus squarrosus H. S. Yates 1936-8-11 6065 Lassen Baxter Creek Susanville Quad., Baxter Creek 1280 Comment
  CHSC27716  Cystopteris fragilis Robert A. Schlising 1978-7-9 3315 Lassen S of Eagle Lake, rocks on E side of Mahogany L. 2060 Comment
  UC1522132  Dalea ornata Arnold Tiehm, Raymond Evans, and James Young 1984-6-7 8592 Lassen 7.5 air mi. n.-n.w. of Litchfield (n.w. side of Shaffe Mt.); Shaffe Mt. 1371 Comment
  UC1137760  Damasonium californicum August L. Hormay 1934-5-14 Lassen Poison Lake Lassen Nat'l Forest, Poison Lake 1706 Comment
  UC1609111  Damasonium californicum Vernon H. Oswald and Lowell Ahart 1993-6-14 5507 Lassen ca. 8 mi. (air) w. of Eagle Lake (Lassen A21 (32N02) 2.1 mi. e. of Lassen 105 (32N28Y), s.e. side of Pine Creek Valley); Pine Creek Valley 1728 Comment
  CAS-BOT-BC445519  Damasonium californicum C. L. Hitchcock 1940-5-26 6646 Lassen Overflow of Pitt River, 1 mile west of Bieber. Comment
  UCD61015  Danthonia californica John Thomas Howell; Gordon H. True and Margaret Williams 1973-6-28 49487 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 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
  UC1131405  Danthonia unispicata Robert W. Gardner 1937-6-18 G- 7 Lassen Burgess Spring Experimental Range Halls Flat Quadrangle Comment
  UC1136812  Danthonia unispicata L. R. Short and Wm. Gansberg 1936-6-8 S- 398 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1755 Comment
  UCD61291  Danthonia unispicata Beecher Crampton 1964-6-25 7069 Lassen 25 miles NW of Susanville, State Hwy. 44, Bogard Ranger Station, Lassen National Forest, meadow of Pine Creek Valley. 1722 Comment
  SDSU4575  Deinandra lobbii D. F. Howe 1961-8-4 3135 Lassen 11.5 miles east of Mc Arthur on U.S. 299. 1372 Comment
  JEPS28461  Delphinium George W. Gillett 1957-7-21 864 Lassen Juniper Lake-Cameron Meadow trail 300 yd n trail summit; Lassen Volcanic National Park 2118 Comment
  JEPS94118  Delphinium andersonii Vernon H. Oswald and Lowell Ahart 1998-5-22 9125 Lassen ca. 5 mi. n.e. Doyle (rd. to summit of Fort Sage Mts., 2.2 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1463 Comment
  CDA24233  Delphinium depauperatum T. C. Fuller 1963-6-1 10636 Lassen Road east to Willow Springs Campground, 1.9 miles east of Pittville-Susanville Road, 11.2 road miles south of Pittville. 0 Comment
  HSC79826  Delphinium depauperatum William Rothstrom 1975-6-9 Lassen Near Day, 1.0 mi. E of large cinder pit mine 1280 Comment
  UC477491  Delphinium nudicaule A. G. Brenneis 1928-5-28 1 Lassen 1/2 mi e Willow Springs; Lassen <National> Forest 1371 Comment
  CAS-BOT-BC116052  Delphinium nuttallianum Albert Michael Vollmer; L. Beane 1953-7-1 84 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC4927  Delphinium nuttallianum L. G. Bennett 1967-6-23 15 Lassen Immediate vicinity of Eagle Lake Biological Station, Eagle Lake. 1554 Comment
  HSC27055  Delphinium nuttallianum John Pratt 1970-6-11 5 Lassen Fredonyer Pass 1738 Comment
  CAS-BOT-BC194265  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-7-22 876 Lassen Snag Lake, margin of gravel bars 100 yards above lake near south shore - Lassen Volcanic National Park 1850 Comment
  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
  CAS-BOT-BC192741  Deschampsia danthonioides John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49499 Lassen Elysian Valley, west of Janesville 1325 Comment
  HSC100183  Deschampsia danthonioides J. P. Smith, J. O. Sawyer 2011-8-15 13379 Lassen Along Hwy. 36 at the intersection with the Bizz Johnson Trailhead Road. Comment
  UC1024821  Deschampsia danthonioides Leo Whitney 1935-6-20 3251 Lassen Camp 10 Fruit Grower's Supply Company Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  CAS-BOT-BC201811  Deschampsia elongata John Thomas Howell; Gordon H. True 1973-7-31 50034 Lassen On road from Janesville to Thompson Peak, Diamond Range 1737 Comment
  CAS-BOT-BC201882  Deschampsia elongata George W. Gillett 1957-7-28 935 Lassen Banks of Widow Lake 2072 Comment
  HSC23170  Deschampsia elongata D. E. Anderson 1969-7-5 4993 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  JEPS68512  Deschampsia elongata Brown and Wieslander 1922-7-19 Lassen Martin Springs meadow Comment
  UC38006  Deschampsia elongata J. Burtt Davy Jun 17 1897-Jun 24 1897 3317 Lassen Honey Lake Valley Comment
  UCD63431  Deschampsia elongata L. Whitney 1933-8-3 Lassen Slate Creek. 1920 Comment
  CHSC64771  Descurainia paradisa Vernon H. Oswald 1995-5-24 6776 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 0.4 mi e of the e end of Amedee Rd. (6.1 mi e of Wendel). Roadside. 1219 Comment
  CHSC29947  Descurainia pinnata Robin L. Ondricek 1978-6-19 62 Lassen Around Eagle Lake Field Station. 1554 Comment
  CHSC4810  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected at Eagle Lake Biology Station, e central shore of Eagle Lake. 1524 Comment
  CHSC4811  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected at Eagle Lake Biology Station, e central shore of Eagle Lake. 1524 Comment
  UC1126907  Descurainia pinnata A. Simontacchi 1940-6-4 808 Lassen 14.8 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1783 Comment
  CDA43000  Descurainia sophia L. Ahart, John Dittes 2008-6-2 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. Comment
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Oct 5 2019
  CHSC64773  Descurainia sophia Vernon H. Oswald 1995-6-7 6840 Lassen Modoc Plateau. Ridge on the n side of Wendel Rd. (Lassen 320) at milepost 11.0, 5.6 mi e of Wendel, ne of Susanville. Near the road. 1231 Comment
  UC1126908  Descurainia sophia A. Simontacchi 1940-6-8 828 Lassen Halls Flat Ranger Station; Lassen National Forest, Halls Flat Quad. 1706 Comment
  SEINET10841501  Descurainia sophia Mary Susan Taylor 1974-1 Taylor 258 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA598803  Dichelostemma multiflorum Christopher Davidson 1975-6-4 2630 Lassen Highway 299, ca 5 miles east of MaArthur. 1136 Comment
  SJSU13913  Dieteria canescens N. A. Hopkins 1986-8-28 1382 Lassen along County Road 33 (Scott Road), Lower Long Valley, N of Highway 70 & E of the Beckwourth Pass Comment
  CAS-BOT-BC299809  Dieteria canescens var. canescens G. Schoolcraft 1988-8-24 1858 Lassen 16 miles east of Adin 1645 Comment
  CAS-BOT-BC299810  Dieteria canescens var. canescens Ella Dales Cantelow 1940-10-5 3412 Lassen N.W. of Johnstonville Comment
  CHSC14068  Dieteria canescens var. canescens K . R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5817 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  CHSC98341  Dieteria canescens var. shastensis B. Castro; L. P. Janeway 2005-7-10 1504 Lassen Northern High Sierra Nevada. Ca 1-2 mi E of Westwood, on N side of Hwy 36. In flat open ridge area within Jeffrey pine/Pondersosa pine forest. Township/Range approximate location. 1566 Comment
  HSC42427  Dieteria canescens var. shastensis Barbara Kelly 1977-8-9 562 Lassen 16 1/4 miles E of Madeline Comment
  JEPS30487  Dieteria canescens var. shastensis Peter H. Raven with Otto T. Solbrig 1958-6-15 13244 Lassen 5.7 mi w Westwood (on State Highway 36) Comment
  UC1136762  Dieteria canescens var. shastensis L. R. Short 1936-6-25 S- 427 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1859 Comment
  CHSC67069  Diplacus mephiticus Willis Ball 1969-6-19 10 Lassen Found in old dry Eagle Lake basin about 1/2 mile N.E. of E.L.B.S. 1554 Comment
  SEINET201638 Image available Diplacus mephiticus Arthur Cronquist, Arthur H. Holmgren 1959-1 8454 Lassen 25 mi NW of Reno Comment
  SEINET13703699  Diplacus mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8673 Lassen Near Old Chat. Comment
  CAS-BOT-BC151429  Diplacus nanus John Thomas Howell 1962-6-19 37887 Lassen 3 mi. s. of Hallelujah Junction - Sierra Nevada 1524 Comment
  CAS-BOT-BC154008  Diplacus torreyi Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16316 Lassen 2 miles E of Plumas-Lassen County line, along California Highway 36, near Westwood Comment
  CAS-BOT-BC208723  Distichlis spicata C. S. Robinson 1928-9-18 119 Lassen Hanna Estate, Morgan Springs 1508 Comment
  CDA31694  Distichlis spicata T. C. Fuller 1959-7-7 4733 Lassen Hwy 395 just east of Standish. 0 Comment
  JEPS123846  Distichlis spicata Lowell Ahart, John Dittes 2015-7-14 20333 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UCD64387  Distichlis spicata A. A. Beetle 1941-6-28 2807 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  UCD64607  Distichlis spicata var. stricta Malcolm A. Nobs; S. Galen Smith 1949-7-22 1069 Lassen NE shore of Eagle Lake. Comment
  SEINET10929826  Distichlis spicata var. stricta Alan A. Beetle 1941-6-28 Beetle 2807 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak, open meadow. Assoc. Stipa pulchra, Hordeum, Koeleria cristata. Comment
  CHSC61993  Dodecatheon alpinum Eenam Sin 1992-6-2 19 Lassen Murrer's Meadow. 1524 Comment
  CHSC7735  Dodecatheon alpinum Beverley J. Wise 1969-4-20 82 Lassen 14.7 mi. north of Susanville on Hwy 139. 1463 Comment
  HSC17905  Dodecatheon subalpinum W. F. Nickel 1965-4-11 Lassen About 100 yds. W of Paynes Creek on Hwy. 36 Comment
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Jun 27 2013
  UCR227662  Downingia R. F. Thorne, Larry E. DeBuhr 1975-8-22 47207 Lassen Modoc Plateau, Hwy 395, c. 5 mi north of Madeline [at Smith Reservoir] and c. 5.5 mi south of Modoc Co. line 1616 Comment
  CHSC113007  Downingia bacigalupii Lowell Ahart; John Dittes 2013-7-22 18875 Lassen Around a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  JEPS127713  Downingia bacigalupii Alejandro Brambila, Michael Dolan 2016-7-20 CA 320 -168 Lassen Portuguese Flat Road North. Comment
  JEPS19679  Downingia bacigalupii Rimo Bacigalupi with George Bacigalupi Jr. and S. Galen Smith 1957-6-28 5999 Lassen 3.1 mi s Madeline (along U.S. Highway 395); Madeline Plain 1615 Comment
  UC1229824  Downingia bacigalupii John Weiler 1959-4-22 59203 Lassen 11.1 mi se Eagle Lake (along county highway A-1) Comment
  UCD55038  Downingia bacigalupii Gerald Dickinson 1963-7-3 73 Lassen U.S. Highway 299; 1 mile west of Bieber. 1249 Comment
  JEPS108448  Downingia bacigalupii Lisa Schultheis 1995-6-27 225 -95 Lassen Champ's Flat. N side of 33N16, 0.3mi from 33N06. Comment
  SEINET12329644  Downingia bacigalupii N. H. Holmgren, Holmgren, P. K. 1980-1 9472 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) W of US Highway 395 from a turnoff 10.3 km 1615 Comment
  CHSC59527  Downingia bicornuta Mary Meyer 1980-7-9 506 Lassen Horse Camp Springs, down-stream in cow pod. 1706 Comment
  POM68179  Downingia bicornuta Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  JEPS114876  Downingia bicornuta var. bicornuta Lowell Ahart, John Dittes 2008-6-20 14945 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
  UC157670  Downingia bicornuta var. bicornuta Milo S. Baker 1894-7-12 Lassen Pine Creek Comment
  UC157671  Downingia bicornuta var. bicornuta Milo S. Baker Lassen near Eagle Lake Comment
  UC28984  Downingia bicornuta var. bicornuta J. Burtt Davy Jun 17 1897-Jun 24 1897 3348 Lassen Honey Lake Valley Comment
  SJSU3174  Downingia insignis J. W. Tilden 1958-6-27 1290 Lassen Madeline Comment
  SEINET10702760  Downingia insignis David B. Dunn 1956-7-3 Dunn 11924 Lassen Alkaline sink by roadside, extra runoff from Hwy. 395. 11 mi. S of Madeline. Comment
  CHSC23440  Downingia laeta K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5805 Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  CHSC65304  Downingia laeta Vernon H. Oswald; Lowell Ahart 1995-8-14 7199 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at a BLM reservoir 11.3 mi W of Hwy. 395, N of Susanville. 1737 Comment
  SEINET8039620  Downingia laeta G. Schoolcraft 1995-6-6 2493 Lassen Laver Spring. 1585 Comment
  CAS-BOT-BC401538  Drosera rotundifolia G. Schoolcraft 1997-8-5 2648 Lassen Along Robbers Creek near Robbers Spring 1798 Comment
  JEPS106520  Drymocallis glandulosa var. glandulosa L. P. Janeway 2004-6-26 8154 Lassen High Cascade Range. About 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest 1750 Comment
  CAS-BOT-BC157796  Drymocallis lactea var. lactea John Thomas Howell 1934-6-14 12156 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC159341  Drymocallis lactea var. lactea Marcus E. Jones 1897-6-28 s.n. Lassen Perkin's Ranch, Diamond Mt., Susanville 2133 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
  HSC4391  Dysphania pumilio M. T. Milligan 1964-8-6 198 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CHSC76099  Elaeagnus angustifolia Lowell Ahart; Vernon H. Oswald 1999-9-13 8223 Lassen On the north side of Mapes Road, about 1/2 mile east of Lambert Lane, about 3-1/2 miles (air) southeast of Standish. 1210 Comment
  CHSC99982  Elaeagnus angustifolia L. P. Janeway 2008-8-2 9522 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
  JEPS120897  Elatine Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18752 Lassen Near pond, about 80 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. 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
  JEPS123970  Elatine californica Lowell Ahart, John Dittes 2015-7-13 20296 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  RSA772751  Elatine californica R. F. Thorne, Larry E. DeBuhr 1975-8-22 47212 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CHSC112748  Elatine rubella Lowell Ahart; John Dittes 2013-7-22 18883 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CAS-BOT-BC113616  Eleocharis acicularis George Wilson Gillett 1957-7-28 933 Lassen Moist shore of Widow Lake. 2072 Comment
  CAS-BOT-BC113617  Eleocharis acicularis George Wilson Gillett 1957-7-22 878 Lassen Snag Lake. Margin of gravel bars along south shore. 1844 Comment
  JEPS19338  Eleocharis acicularis Brown and Wieslander 1922-7-30 82 Lassen Martin Sprs. Eagle Lake Comment
  JEPS28331  Eleocharis acicularis George W. Gillett 1957-7-22 878 Lassen Snag Lake Lassen Volcanic National Park (margin of gravel bars along s shore) 1844 Comment
  HSC7304  Eleocharis acicularis Fred J. Kindel 1955-6-15 Lassen Mt. Meadows Reservoir, Westwood Comment
  CAS-BOT-BC113563  Eleocharis bolanderi Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. Comment
  CAS-BOT-BC113361  Eleocharis engelmannii James D. Jokerst 1983-7-23 1873 Lassen Grasshopper Valley Quad, near Madeline Plains. 1614 Comment
  CHSC77256  Eleocharis macrostachya G. Schoolcraft 1995-6-27 2499 Lassen Cherry Creek. 1524 Comment
  CAS-BOT-BC112846  Eleocharis macrostachya John Thomas Howell 1973-7-10 49805 Lassen Near Susanville on road to Janesville. 1295 Comment
  CAS-BOT-BC112847  Eleocharis macrostachya Hans Leschke 1959-8-2 1588 Lassen Manzanita Lake 1781 Comment
  UC1142940  Eleocharis palustris A. L. Hormay 1941-6-18 2 Lassen Little Harvey Valley 1676 Comment
  UC1758  Eleocharis parishii J. Burtt Davy Jun 17-24 1897 3292 Lassen Tule Confederacy, Honey Lake Valley Comment
  UCD54570  Eleocharis parvula Ellen Dean; Dawn Cunningham 2005-10-25 2753 Lassen East of the town of Susanville. Property N of California Correctional Facility. Western side of property. Extensive seasonal wetland system that was used until June 2005 as receiving area for geothermal heating system used by Correctional Facility and prison. 1248 Comment
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Oct 5 2010
  HSC95170  Eleocharis suksdorfiana Gordon Leppig 1998-8-17 1045 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95334  Eleocharis suksdorfiana Gordon Leppig, Tony LaBanca, L. Arguello 1997-6-28 515 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC203831  Elymus X hansenii David D. Keck; J. Clausen 1935-6-24 3751 Lassen 2 mi. S. of Ravendale 1464 Comment
  UCD62907  Elymus X saundersii Beecher Crampton 1954-7-5 2061 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  JEPS127354  Elymus caput-medusae Lowell Ahart, John Dittes 2016-7-13 21145 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC13594  Elymus cinereus J. Pitts 1972-6-23 270 Lassen 300 yds. ne of Eagle Lake Field Station. Comment
  HSC5270  Elymus cinereus M. T. Milligan 1964-8-6 197 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CAS-BOT-BC227485  Elymus elymoides Brighton C. Cain 1925-8-25 125 Lassen Horse trail from Drakesbad to summit of Mt. Lassen 2438 Comment
  UCD61485  Elymus elymoides Beecher Crampton 1954-7-6 2075 Lassen Along US Hwy 395, 15 miles south of Ravendale. 1676 Comment
  CHSC6320  Elymus elymoides subsp. elymoides Nick Santamaria 1968-6-29 16 Lassen On the ELBS grounds. Comment
  CHSC7687  Elymus elymoides subsp. elymoides Beverley J. Wise 1969-5-23 136 Lassen 34.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  UC1133007  Elymus elymoides subsp. elymoides H. P. Hagge 1929-9-11 23 Lassen Logan Mtn. Lassen National Forest, Eagle Lake Quadrangle Comment
  JEPS126479  Elymus elymoides var. californicus Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-30 CA 350 -043 Lassen Take 139 towards Antelope Grade and take a right after passing the fire station. Continue on dirt road for less than 0.5 miles. Comment
  JEPS126494  Elymus elymoides var. californicus Alia Johnson, Jocelyn Munoz, Jillian Sarazen 2016-7-5 CA 350 -73 Lassen Heading north on 395 turn right on to Smoke Creek Road and drive up the road towards the uphill to where the Rush fire burned. Comment
  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
  UCD61838  Elymus glaucus Burle Jones 1940-8-15 Lassen Lassen Park, Hat Creek. Comment
  CAS-BOT-BC206735  Elymus glaucus subsp. glaucus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49446 Lassen Elysian Valley, west of Janesville - Sierra Nevada 1325 Comment
  UCR17291  Elymus spicatus Frank C. Vasek 1975-7-11 750711- 02 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CDA31738  Elymus trachycaulus T. C. Fuller 1963-7-15 10888 Lassen 2.9 miles southeast of Pittville, south of road to Little Valley 0 Comment
  JEPS68378  Elymus trachycaulus Brown and Wieslander 1922-7-23 74 Lassen Martin Springs Comment
  CHSC92829  Elymus trachycaulus subsp. subsecundus Lowell Ahart; John Dittes 2005-6-1 11880 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
  CAS-BOT-BC204359  Elymus trachycaulus subsp. trachycaulus G. Schoolcraft 1994-8-2 2396 Lassen About 2 miles NW of Boot Lake 2438 Comment
  RSA299617  Elymus trachycaulus subsp. trachycaulus J. T. Howell 1973-7-10 49776 Lassen Fredonyer Pass 1738 Comment
  UC1924266  Elytrigia pontica subsp. pontica Debra Valov 2005-8-20 2005230 Lassen Bieber; off County A2 c. 12 km east of Hwy 299 1279 Comment
  CHSC71123  Ephedra viridis Vernon H. Oswald; Lowell Ahart 1998-5-22 9103 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
  CHSC89  Ephedra viridis 1928-5-28 Lassen Antelope grade north of Susanville. 1615 Comment
  SEINET3868652  Ephedra viridis D. W. McNeal 1980-6-1 2337 Lassen Above Hwy. #139, 5.4 mi. n. of the jct. of Hwy. #36 in Susanville.; 0 Comment
  SEINET5335198  Ephedra viridis F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  CHSC29866  Epilobium brachycarpum Robin L. Ondricek 1978-6-27 72 Lassen .6 mi n of Five Corners along road to ELFS. 1706 Comment
  UC1136768  Epilobium brachycarpum George A. Fischer and Irwin H. Johnson 1933-7-12 F 191 Lassen Dry Lake Lassen National Forest, Grass Valley 1694 Comment
  HSC22866  Epilobium brachycarpum John Pratt 1970-6-14 17 Lassen Comment
  UC1191740  Epilobium ciliatum subsp. ciliatum Malcolm A. Nobs and S. Galen Smith 1949-8-20 1471 Lassen 1 mi s Milford (seepage area); Honey Lake Valley Comment
  CHSC118481  Epilobium ciliatum subsp. ciliatum Don Lepley 2015-6-28 Lassen Lassen National Forest. Eagle Lake Ranger District. Southwest corner of Eagle Lake, roughly a half-mile northeast of entrance to Christie Campground, close to current lakeshore. UTM 683603 x 4493237 1559 Comment
  HSC100124  Epilobium ciliatum subsp. ciliatum M. T. Milligan 1964-7-16 143 Lassen 2 mi. W on Silver Lake Rd., along Upper Susan River 1829 Comment
  RSA0105579  Epilobium densiflorum Lowell Ahart, John Dittes 2013-7-22 18878 Lassen 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
  UC303068  Epilobium glaberrimum subsp. glaberrimum Pearl Safford Lassen Susanville [uncertain locality] Comment
  UC1924264  Epilobium hallianum Debra Valov 2005-8-20 2005226 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC77220  Epilobium oregonense G. Schoolcraft 1993-7-20 2330 Lassen About 1 mile s. of Boot Lake. Along creek. 1950 Comment
  HSC95331  Epilobium oregonense Gordon Leppig, J. Cromwell 1997-7-27 605 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  SEINET3271523 Image available Epilobium oregonense Marcus E. Jones 1897-6-30 Lassen 4 mi below Eagle Lake 1524 Comment
  JEPS87409  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
  SEINET194973  Epilobium pallidum A. A. Heller 1938-7-28 15295 Lassen Edge of swamp about mile east of Westwood 1524 Comment
  UC1122350  Epilobium torreyi A. Simontacchi 1940-6-30 905 Lassen 2.2 mi ene Ebey Lake 1699 Comment
  CAS-BOT-BC57976  Equisetum John Thomas Howell 1976-7-19 51994 Lassen On Gold Run Creek sw. of Susanville. Comment
  CAS-BOT-BC57099  Equisetum X ferrissii Margaret Williams; Louella Bass 1972-10-22 EV 8 Lassen Elysian Valley, northwest of Janesville 1325 Comment
  CAS-BOT-BC57307  Equisetum laevigatum John Thomas Howell 1974-7-8 50473 Lassen Susanville 1295 Comment
  CAS-BOT-BC204432  Eragrostis cilianensis John Thomas Howell 1973-7-10 49793 Lassen Susanville 1295 Comment
  CHSC76105  Eragrostis cilianensis Lowell Ahart; Vernon H. Oswald 1999-9-13 8229 Lassen Along the north side of Mapes Road, about 200 yards east of Lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 Comment
  CHSC91598  Eragrostis cilianensis G. Douglas Barbe 1978-8-31 2425 Lassen Modoc National Forest. Roadside, Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). 1417 Comment
  OBI76981  Eremogone congesta Anthony Baniaga 2011-6-23 390 Lassen Lassen Natl Forest. Windy Gap Well vicinity. Harvey Mtn quad T32N R8e sec 6 NE of SW 1675 Comment
  CAS-BOT-BC174200  Eremogone congesta var. congesta David D. Keck; J. Clausen 1935-6-24 3746 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC89729  Eremogone congesta var. congesta L. P. Janeway 2004-6-26 8165 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  CAS-BOT-BC159999  Eremothera boothii subsp. alyssoides Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 7 miles south of Secret Valley C.C.C. Camp 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
  UC725471  Eremothera boothii subsp. alyssoides A. A. Heller 1938-6-23 15212 Lassen on Hwy 395 about midway between Mapes and Secret Valley 1371 Comment
  UC1483823  Eremothera minor G. Schoolcraft 1980-6-11 267 Lassen w Wendel 1219 Comment
  SEINET14595159  Eriastrum signatum M. J. Williams 1974-7-26 74 -L-27 Lassen S of Hwy 70, 2 miles W of Hallelujhah Junction. 1494 Comment
  CAS-BOT-BC515169  Eriastrum signatum John Thomas Howell 1934-6-10 11840 Lassen Near Plumas Junction Comment
  CAS-BOT-BC515174  Eriastrum signatum L. S. Smith 1937-7-1 2783 Lassen Plumas Forest, Honey Lake Valley N of highway near E end of the lake Comment
  OBI82827  Eriastrum sparsiflorum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3932 Lassen 0.1 rd mi E of jct with Hwy 395 on Standish Buntingville Rd (A3). Buntingville. Both sides of rd.; 0 1261 Comment
  SEINET7356272  Eriastrum sparsiflorum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3932 Lassen 0.1 rd mi E of jct with Hwy 395 on Standish Buntingville Rd (A3). Buntingville. Both sides of rd.; 0 1261 Comment
  UC133906  Eriastrum sparsiflorum Dr. Gustav Eisen July 1891 Lassen Honey Lake Comment
  JEPS14040  Eriastrum wilcoxii Rimo Bacigalupi with G. T. Robbins 1955-7-21 5418 Lassen along Smoke Creek rd. 6.8 mi e U.S. Highway 395 (s edge of valley); Secret Valley Comment
  UC133905  Eriastrum wilcoxii T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  UCD149881  Eriastrum wilcoxii William Anderson 1963-6-26 s.n. Lassen Honey Lake. Comment
  CAS-BOT-BC286606  Ericameria bloomeri E. K. Balls; P. C. Everett 1952-10-9 18134 Lassen About Plumas-Lassen county line, Hwy 89, east of Lake Almanor 1219 Comment
  CAS-BOT-BC286607  Ericameria bloomeri Gary Schoolcraft 1984-8-21 1367 Lassen Eastern slopes of Fredonyer Mtn. 33-12-35 2072 Comment
  HSC69070  Ericameria bloomeri Gary Schoolcraft 1979-8-15 176 Lassen Tule Mtn. Area 2043 Comment
  UC1136848  Ericameria bloomeri George A. Fischer and Irwin H. Johnson 1933-8-26 F- 280 Lassen n border Grass Valley; Lassen Forest, Grass Valley 1676 Comment
  UC1523743  Ericameria bloomeri Gary Schoolcraft 1981-8-25 565 Lassen w side of Eagle Lake (along main road) Comment
  CHSC12490  Ericameria nauseosa Carol Weld 1969-6-19 59 Lassen Ca 150 yd N.W. of Eagle Lake Field Station. 1554 Comment
  CAS-BOT-BC298179  Ericameria nauseosa var. oreophila John Thomas Howell 1924-8-13 s.n. Lassen Near Doyle Comment
  CAS-BOT-BC298183  Ericameria nauseosa var. oreophila Carl B. Wolf 1931-9-4 2397 Lassen Big Valley, 3.6 miles from Bieber on road to Alturas 1267 Comment
  CHSC76085  Ericameria nauseosa var. oreophila Lowell Ahart; Vernon H. Oswald 1999-9-13 8220 Lassen Along road, about 100 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
  CAS-BOT-BC294179  Ericameria nauseosa var. speciosa G. Schoolcraft 1994-9-13 2429 Lassen Just above gate along road to Fredonyer Peak lookout 2255 Comment
  CAS-BOT-BC294183  Ericameria nauseosa var. speciosa Clare B. Hardham 1969-8-28 17426 Lassen West of Janesville Comment
  JEPS21518  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass between Shaffer Mt. and Warren Peak Comment
  CAS-BOT-BC299485  Ericameria nauseosa var. washoensis Gary Schoolcraft 1979-8-23 181 Lassen Just off Post Camp Road along road to Big Spring 1676 Comment
  CAS-BOT-BC293009  Ericameria parryi var. nevadensis C. B. Wolf 1931-9-6 2405 Lassen 1/2 mile from Janesville on the road to Wendel - Western edge of Honey Lake Valley 1280 Comment
  CHSC77193  Ericameria suffruticosa G. Schoolcraft 1997-8-6 Lassen Diamond Mtn. 2316 Comment
  CHSC78479  Ericameria suffruticosa Vernon H. Oswald 2000-7-31 9946 Lassen Spur road leading from Forest Road 28N15 to the small pond on the crest of Diamond Mountain. 2215 Comment
  SEINET10721387  Erigeron Paul Gallian, David B. Dunn 1971-6-2 Gallian 462 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
  UC31422 Image available Erigeron barbellulatus M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake; ; Silver Lake, Lassen Co. Comment
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Oct 3 2015
  JEPS80681  Erigeron bloomeri L. R. Heckard and T. I. Chuang 1981-6-10 5532 Lassen North Eagle Lake Campground Eagle Lake (nw corner of lake) 1524 Comment
  SEINET8513002 Image available Erigeron bloomeri A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-5-28 s.n. Lassen Costantia Allotment. West of Peterson's 1490 Comment
  SEINET10617398  Erigeron bloomeri Billy Joe Cox 1971-6-2 Cox 2994 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon Pine, Jeffrey Pine along high ridge & in sandy wash. 1402 Comment
  CHSC67162  Erigeron bloomeri var. bloomeri James D. Jokerst 1991-5-29 3315 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 ca. 0.75 N of the N end of Eagle Lake, E of the highway +/- 500 ft on top of ridge n of a drainage. 1584 Comment
  JEPS80680  Erigeron bloomeri var. bloomeri L. R. Heckard and T. I. Chuang 1981-6-10 5532 Lassen North Eagle Lake Campground Eagle Lake (nw corner of lake) 1524 Comment
  UC1136835  Erigeron bloomeri var. bloomeri L. R. Short and J. Warren 1936-6-23 S- 451 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1741 Comment
  UC1228141  Erigeron bloomeri var. bloomeri Beecher Crampton 1960-6-18 5723 Lassen vicinity Blue Lake Ranch; southern Warner Mountains Comment
  UC1609105  Erigeron bloomeri var. bloomeri Vernon H. Oswald and Lowell Ahart 1993-6-28 5581 Lassen Harvey Valley Rd (33N02) 1.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1731 Comment
  UCR45383  Erigeron bloomeri var. bloomeri Thomas W. Nelson, Jane P. Nelson 1980-7-6 6034 Lassen Ash Valley, along branch road off Adin-Madeline Road just south of bridge over Ash Creek, & c. 16 mi. SE of Adin; 2.5 mi. SE of junction with main road 1555 Comment
  CAS-BOT-BC294493  Erigeron bloomeri var. bloomeri Ella Dales Cantelow 1941-5-22 3566 Lassen Few mi. n. of Litchfield. U.S. Hy. 395 to Alturas Comment
  RSA636042  Erigeron bloomeri var. bloomeri Michael A. Vincent 1999-6-9 8583 b 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
  CAS-BOT-BC296847  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-16 8340 Lassen Janesville Comment
  CAS-BOT-BC295978  Erigeron divergens Gary Schoolcraft 1984-9-4 1372 Lassen Fredomyer Mtn. 1737 Comment
  CAS-BOT-BC296846  Erigeron divergens John Thomas Howell 1973-7-10 49773 Lassen Near Westwood, Sierra Nevada 1554 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
  UCD131887  Erigeron eatonii var. nevadincola Grady L. Webster 1989-5-13 7719 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  RSA504624  Erigeron eatonii var. plantagineus Bruce Bartholomew, B. Anderson 1988-6-25 4374 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  SBBG8127  Erigeron eatonii var. plantagineus H. and M. Dearing 1938-6-30 2233 Lassen N of Susanville [Hwy 44] Comment
  CAS-BOT-BC300426  Erigeron elegantulus Mrs. C. C. Bruce 1898-6-1 2182 Lassen Madeline Plains Comment
  CHSC112185  Erigeron elegantulus Dean Wm. Taylor 2012-6-7 21227 Lassen Modoc Plateau. Grass Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139. 1635 Comment
  HSC63942  Erigeron filifolius Teresa Prendusi 1980-7-10 Lassen Little Fredonyer, NW end of Horse Lake 1677 Comment
  UC2027204  Erigeron inornatus var. calidipetris Anthony Baniaga 2011-8-3 485 Lassen Lassen National Forest. N of 30N61, W of A21. Swain Mountain quadrangle Comment
  CHSC92960  Erigeron inornatus var. inornatus L. P. Janeway 2005-8-27 8521 Lassen High Cascade Range. Along Road 22, 2.1 road km west of its beginning/end at Road 35N05 in Little Valley. 1415 Comment
  JEPS100464  Erigeron inornatus var. inornatus Dean W. Taylor 2001-6-28 17820 Lassen Diamond Mountains, Crystal Peak, along ridgeline at the summit 2377 Comment
  CAS-BOT-BC295471  Erigeron lassenianus var. lassenianus Lassen 1927 G. S. Crew 1927-6-25 34 Lassen Lassen National Forest. Norval Flat 1747 Comment
  JEPS94538  Erigeron linearis Vernon Oswald and Lowell Ahart 1997-6-24 8608 Lassen 0.7 mi e of boundary of Lassen National Forest (5.4 mi e of Gold Run Road (29N10), s of Susanville, on n side of Diamond Mountain along Forest Road 29N43); Diamond Mountain along Forest Road 29N43 1889 Comment
  CHSC77195  Erigeron nevadincola G. Schoolcraft 1998-6-30 Lassen N. slope of Ft. Sage Mtns. 1950 Comment
  UCR7844  Erigeron philadelphicus Marilyn Malin 1968-6-27 255 Lassen Spring fed roadbank on E side of Rd 425, c. 1 mi north of Gallatin Beach Picnic area, SW side of Eagle Lake. 1570 Comment
  POM261457  Erigeron pumilus subsp. intermedius Alice Eastwood, John Thomas Howell 1940-6-15 8312 Lassen Upper Willow Creek east of Hayden Hill Comment
  HSC100803  Erigeron pumilus var. intermedius Lowell Ahart, John Dittes 2010-7-31 16986 Lassen 3,330 ft. N of where the road crosses Hunsinger Draw, 1.9 (air) mi. NW of Moll Reservoir, 2.8 (air) mi. W of Ash Valley, and 8.4 (air) mi. SE of Adin. 1521 Comment
  JEPS94532  Erigeron pumilus var. intermedius Vernon Oswald and Lowell Ahart 1997-6-24 8648 Lassen s of Susanville (at the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC31462  Erigeron pumilus var. intermedius M. S. Baker and Frank Nutting 1894-6-20 Lassen Big Valley Comment
  CAS-BOT-BC300121  Erigeron pumilus var. intermedius E. K. Balls 1950-5-22 14829 Lassen 1.5 mi. southeast of Milford, Hwy 395, above Honey Lake 1280 Comment
  CAS-BOT-BC241566  Eriogonum baileyi var. baileyi John Thomas Howell; Gordon H. True 1973-8-1 50163 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  JEPS57071  Eriogonum baileyi var. baileyi W. L. Jepson 1918-8-14 7995 Lassen e side, Madeline Plains, at base of foothills Madeline Plains 1615 Comment
  SEINET530701  Eriogonum baileyi var. baileyi Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  UC1409081  Eriogonum baileyi var. baileyi R. F. Thorne and C. W. Tilforth 1969-9-6 39260 Lassen ca. 0.7 mi se along Hwy 395 Milford (w of Honey Lake) 1280 Comment
  UCR67382  Eriogonum baileyi var. baileyi George K. Helmkamp 1990-10-4 M 9 A Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  CAS-BOT-BC241567  Eriogonum baileyi var. baileyi John Thomas Howell; G. H. True 1973-7-31 50144 Lassen Janesville 1295 Comment
  CHSC7738  Eriogonum caespitosum Beverley J. Wise 1969-5-3 78 Lassen 3.4 mi east of junction with Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1584 Comment
  NY242508  Eriogonum collinum H. D. D. Ripley 1943-6-15 5758 Lassen Near Viewland. 1310.6 Comment
  SEINET5328978  Eriogonum collinum N. H. Holmgren, James Lauritz Reveal 1964-8-22 1723 Lassen 48 miles northeast of Susanville, 4 iles south of Ravendale, Comment
  NY570382  Eriogonum douglasii S. L. Welsh 2001-6-14 28154 Lassen East of Highway 395, road to Rams Horn Spring campground 1539.2 Comment
  CAS-BOT-BC246498  Eriogonum douglasii var. meridionale H. D. Ripley; R. C. Barneby 1943-6-13 5712 Lassen South of Johnstonville 1325 Comment
  CAS-BOT-BC246501  Eriogonum douglasii var. meridionale Brandegee 1892-7-2 s.n. Lassen Susanville Comment
  CHSC99120  Eriogonum douglasii var. meridionale Lowell Ahart; John Dittes 2008-6-19 14895 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  CHSC50839  Eriogonum elatum var. elatum Vernon Oswald; Lowell Ahart 1990-7-25 4399 Lassen Intersection of Hwy 70 and Scott Rd, 2.2 mi west of Hwy 395. 1463 Comment
  CHSC93241  Eriogonum elatum var. elatum John Dittes; Scott Chamberlain 2004-6-28 1020 B Lassen Modoc Plateau; Long Valley; ca. 5.5 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.5 air-miles west of Hwy 395, ca. 1.3 air-miles east of Plumas County line; near meadow edge. 1496 Comment
  CHSC93237  Eriogonum elatum var. villosum John Dittes; Scott Chamberlain 2004-6-28 1020 A Lassen Modoc Plateau; Long Valley; ca. 4.6 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 3.2 air-miles west of Hwy 395, ca. 0.3 air-mile east of Plumas County line; near meadow edge. 1511 Comment
  RSA766386  Eriogonum eximium Susan Hutchinson 1929-12 857 Lassen Desert slope of Sierra Nevada, Lassen. 1220 Comment
  UCD100069  Eriogonum fasciculatum var. polifolium Collector unknown 1919-5-1 289 Lassen Coyote Hill. Comment
  CAS-BOT-BC263046  Eriogonum maculatum Robert F. Hoover 1940-10-5 4670 Lassen Wendel Comment
  CAS-BOT-BC263047  Eriogonum maculatum R. F. Hoover 1940-10-5 4670 Lassen Wendel Comment
  UC85967  Eriogonum maculatum T. S. Brandegee 1892-6-23 Lassen Honey Lake 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
  UC584321  Eriogonum marifolium G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2289 Lassen s Jaynesville (e slope of Thompson Peak); Thompson Peak 2330 Comment
  RSA78918  Eriogonum microtheca var. laxiflorum E. K. Balls, Percy C. Everett 1952-10-10 18143 Lassen 8 mi. SE of Ravendale, Hwy 395, Susanville to Alturas. 1280 Comment
  NY282159  Eriogonum microthecum var. laxiflorum R. F. Hoover 1940-9-28 4636 Lassen Canyon north of Leavitt. Comment
  UC85949  Eriogonum microthecum var. laxiflorum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  UC1980557  Eriogonum microthecum var. schoolcraftii James L. Reveal 2002-8-2 8370 Lassen 0.2 mile west of Plinco Mine Road (Lassen Co. Rd. 331), 3.5 miles east of U.S. Hwy. 395 at Doyle. Comment
  POM105409  Eriogonum nudum var. deductum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  RSA518444  Eriogonum nudum var. nudum George K. Helmkamp 1990-10-4 M- 4 Lassen South of Susanville in Plumas National Forest; north of Milford Pass. 1463 Comment
  CAS-BOT-BC269826  Eriogonum nudum var. pubiflorum John Thomas Howell 1934-7-8 12498 Lassen Spalding's, Eagle Lake Comment
  UC1032332  Eriogonum nudum var. pubiflorum A. Simontacchi 1940-7-2 931 Lassen 6. 2 mi ene Ebey Lake; Lssen National Forest, Halls Flar Quadrangle Comment
  RSA0030655  Eriogonum nudum var. pubiflorum Anthony Baniaga 2011-8-3 484 Lassen Lassen National Forest. Along Highway 44, S of 31N21 1800 Comment
  RSA0039349  Eriogonum nummulare John F. Emmel 1993-7-29 1284 Lassen Southeast Honey Lake Valley; 4.1 air miles west and 1.3 air miles south of Calneva railroad stop, ca. 2 air miles north of peak of Turtle Mountain. 1255 Comment
  NY281931  Eriogonum ochrocephalum var. ochrocephalum N. H. Holmgren 1970-6-25 4378 Lassen North end of Peterson Mountain, near US 395, 8 miles north of junction with Calif. 70 (Hallelujah Junction). 1524.0 Comment
  CHSC114416  Eriogonum ovalifolium var. depressum Don Lepley 2012-7-26 Lassen Windy Hollow, west of Highway 44 about three miles southeast of Bogard Rest Area. (plants also in Section 14 and probably Sec. 15 of T31N R08E) 1722 Comment
  UC1483820  Eriogonum prociduum G. Schoolcraft 1980-7-14 308 Lassen w Madeline (Ash Valley); Ash Valley 1548 Comment
  CHSC12948  Eriogonum prociduum var. prociduum K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5813 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  CHSC45490  Eriogonum spergulinum var. reddingianum Lowell Ahart; John Thomas Howell 1974-7-9 516 Lassen Along the edge of Eagle Lake. 1584 Comment
  JEPS56326  Eriogonum spergulinum var. reddingianum Hilda Grinnell 1928-6-28 Lassen near Butte Lake 1889 Comment
  POM165251  Eriogonum spergulinum var. reddingianum M. S. Baker 77 Lassen Pine Creek. Comment
  UC303059  Eriogonum spergulinum var. reddingianum Pearl Safford Lassen Susanville [uncertain locality] Comment
  POM105202  Eriogonum sphaerocephalum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC271960  Eriogonum sphaerocephalum var. halimioides B. J. Hammerly 1941-6-21 46 Lassen 8 mi. SE. of Likely on Blue Lake Road 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
  SEINET11261405  Eriogonum sphaerocephalum var. halimioides Arthur Cronquist, Arthur H. Holmgren 1959-6-18 8482 Lassen 5 miles south of Adin.; 0 Comment
  JEPS56418  Eriogonum sphaerocephalum var. sphaerocephalum Hilda W. Grinnell 1934-5-31 Lassen near Susanville (mouth of Piute Creek Canyon); Piute Creek Canyon Comment
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  CHSC25913  Eriogonum strictum var. anserinum K. R. Stern 1967-6-24 2438 Lassen Murrer Meadow Road, ca. 2.5 mi SE of Eagle Lake Biology Station. 1554 Comment
  CHSC6224  Eriogonum strictum var. anserinum A. Santos 1946-6-17 Lassen Mt. Fredonyer road. Eagle Lake. 2133 Comment
  CHSC71247  Eriogonum strictum var. anserinum Vernon H. Oswald; Lowell Ahart 1998-6-4 9147 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  CAS-BOT-BC267816  Eriogonum umbellatum var. covillei Annie M. Alexander; Louise Kellogg 1942-8-21 3356 Lassen Below Golden Trout Resort, Cottonwood Creek, Cottonwood Lakes, southwest of Lone Pine, Sierra Nevada Comment
  CAS-BOT-BC267817  Eriogonum umbellatum var. covillei Annie M. Alexander; Louise Kellogg 1942-8-21 3356 Lassen Below Golden Trout Resort, Cottonwood Creek, Cottonwood Lakes, southwest of Lone Pine, Sierra Nevada Comment
  CHSC12489  Eriogonum umbellatum var. modocense Carol Weld 1969-7-16 62 Lassen 1 and 1/2 miles S. E. of Eagle Lake Field Station toward Hwy. 139. 1554 Comment
  CHSC4436  Eriogonum umbellatum var. modocense K. R. Stern 1967-7-1 2461 Lassen Ca. 16 mi. NE of Susanville. State Hwy 139. Comment
  CHSC99123  Eriogonum umbellatum var. modocense Lowell Ahart; John Dittes 2008-6-19 14882 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS88218  Eriogonum umbellatum var. modocense Vernon H. Oswald and Lowell Ahart 1996-6-17 7799 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville 1420 Comment
  CAS-BOT-BC265099  Eriogonum umbellatum var. nevadense Mrs. E. C. Van Dyke 1931-6-13 s.n. Lassen Kelly Camp, Mt. Lassen Natl. Park Comment
  UC55391  Eriogonum umbellatum var. nevadense J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Long Valley Honey Lake Valley, Long Valley Comment
  RSA221784  Eriogonum umbellatum var. polyanthum Noel Holmgren, J. J. Fay, B. L. Bethers 1970-6-25 4375 Lassen North end of Petersen Mountain, near Hwy 395, 8 miles north of jct. with Hwy 70 (Hallelujah Junction) 1524 Comment
  CAS-BOT-BC262363  Eriogonum vimineum John Thomas Howell 1934-6-10 11893 Lassen Horse Lake Comment
  CHSC4953  Eriogonum vimineum R. Carter 1967-6-27 561 Lassen Growing ca. 10 yds off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 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
  NY399826  Eriogonum vimineum G. Schoolcraft 1982-8-18 889 Lassen Along Doyle Grade road west of Doyle Creek 1585.0 Comment
  UC412830  Eriogonum vimineum Lewis S. Rose 1940-6-16 40596 Lassen Janesville 1280 Comment
  UC6518  Eriogonum vimineum M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CAS-BOT-BC262355  Eriogonum vimineum David D. Keck 1930-7-23 951 Lassen Susanville 1280 Comment
  HSC69595  Eriogonum vimineum J. Walker 1979-7-18 37 Lassen Near Skedaddle Creek, S portion 1311 Comment
  CAS-BOT-BC300339  Eriophyllum Mike Vasey 1990-6-30 9058 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CAS-BOT-BC300340  Eriophyllum A. M. Vollmer; L. Beane 1953-7-1 42 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC23514  Eriophyllum lanatum Wayne O. Baum 1971-7-6 71 -48 Lassen E. slope of Gallatin Peak. 1950 Comment
  CHSC4435  Eriophyllum lanatum K. R. Stern 1967-7-1 2443 Lassen Murrer Meadow Road, ca. 2.5 mi. SE of Eagle Lake Biology Station. 1554 Comment
  CAS-BOT-BC308136  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-6 12445 Lassen Harvey Valley Comment
  CAS-BOT-BC308137  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-8 12481 Lassen Spalding's, Eagle Lake Comment
  JEPS103221  Eriophyllum lanatum var. achilleoides G. Schoolcraft 1991-7-30 2199 Lassen E. slope of widow mountain 1859 Comment
  UC566757  Eriophyllum lanatum var. achilleoides Loyd Swift 1928-6-12 Lassen Halls Flat Lassen National Forest, Halls Flat Comment
  UC725390  Eriophyllum lanatum var. achilleoides A. A. Heller 1938-6-23 15197 Lassen e slope of Freydonyer Pass (on State Highway #36); State Highway #36, Freydonyer Pass 1645 Comment
  RSA92671  Eriophyllum lanatum var. achilleoides F. W. Peirson 1926-6-24 6849 Lassen Several miles southward from the Madeline Plain Comment
  UCR18727  Eriophyllum lanatum var. grandiflorum Frank C. Vasek 1975-7-11 750711- 06 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  JEPS29200  Eriophyllum lanatum var. integrifolium Lauramay T. Dempster 1961-6-17 1677 Lassen about 8 mi n of Karlo Road junction with Hwy. 395 1584 Comment
  OBI76976  Eriophyllum lanatum var. integrifolium Anthony Baniaga 2011-6-20 386 Lassen Lassen Natl Forest. Windy Gap Well vicinity. Harvey Mtn quad T32N R8e sec 6 NE of SW 1675 Comment
  UC90245  Eriophyllum lanatum var. integrifolium T. S. Brandegee 1892-7-26 Lassen Milford Comment
  RSA715976  Erodium cicutarium L. Ahart, John Dittes 2005-6-2 11923 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4.75 miles (air) N of the intersection of Scott Road and Hwy 70, 6.2 miles (air) NW of Hallelujah Junction. 1460 Comment
  UCD107938  Eryngium pinnatisectum Tim Kuhn 2006-7-20 53 Lassen Eagle Lake Ranger District. Comment
  CAS-BOT-BC54588  Erysimum capitatum Al Simontacchi 1940-6-15 868 Lassen Lassen Forest. 0.6 miles west southwest of Black Mountains. 2133 Comment
  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
  JEPS114375  Erysimum repandum Lowell Ahart, John Dittes 2008-6-20 14900 Lassen About 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CAS-BOT-BC55194  Erysimum repandum Gary Schoolcraft 1982-5-20 668 Lassen Along Shaffer Mountain Road near Highway 395. 1386 Comment
  CAS-BOT-BC55196  Erysimum repandum John Thomas Howell 1934-6-10 11904 Lassen 3 miles south of Ravendale. Comment
  UCD149850  Erysimum repandum William Anderson 1963-4-16 s.n. Lassen Honey Lake Valley. Comment
  CHSC60405  Erythranthe breweri Mary Ann Showers 1992-6-12 2527 Lassen Lassen Volcanic National Park. Butte Lake. 1859 Comment
  CHSC106222  Erythranthe guttata Arthur C. Barrett 1915-6-3 14 Lassen Laufman Ranger Station. 1463 Comment
  CHSC5909  Erythranthe primuloides J. B. Kimsey 1946-6-20 Lassen Grasshopper Valley. 1615 Comment
  RSA234813  Erythranthe pulsiferae Francis W. Pennell 1940-6-10 25781 Lassen Northeast of West wood. 1646 Comment
  PASA565  Erythronium purpurascens Margaret Stason 1932-6-21 440 Lassen Devil's Kitchen, Lassen National Park Comment
  UC725540  Eschscholzia californica A. A. Heller 1941-6-26 16228 Lassen a short distance w county line near Adin (Modoc County) (along U.S. Hwy 299) Comment
  CAS-BOT-BC403151  Eschscholzia californica Ira L. Wiggins; Dorothy B. Wiggins 1961-6-16 165311 Lassen Along Highway 299, overlooking Big Valley 1249 Comment
  CHSC54180  Euclidium syriacum Vernon H. Oswald 1991-5-28 4616 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. On the east side of the barn. 1264 Comment
  CDA3709  Euclidium syriacum Lee Wheeler 1955-6-24 Lassen Bieber area. 0 Comment
  SFV1478  Euclidium syriacum B. J. McCaskill 1966-6-5 712 Lassen Frosty Acres Ranch, at end of Albaugh Road, 0.6 miles west of its junction with Bassett Road (about 2 miles south of U. S. Highway 299 and 4 miles southwest of Adin). 1280 Comment
  SEINET8506929  Euphorbia crenulata D. W. Taylor 2008-5-14 20198 Lassen Unnamed flat about 2 air miles SSE of Poison Butte 1768 Comment
  UCD39131  Euphorbia crenulata Beecher Crampton 1964-6-25 7072 Lassen 25 miles n.w. Susanville State Hwy. 44, Bogard Ranger Station, Lassen National Forest. 1722 Comment
  UCD142769  Euphorbia serpillifolia R. N. Raynor 1938-7-16 s.n. Lassen Honey Lake Valley. Comment
  CAS-BOT-BC312103  Eurybia integrifolia B. Bartholomew; B. Anderson 1988-7-22 4502 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountain 2080 Comment
  CAS-BOT-BC278429  Festuca idahoensis Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  CAS-BOT-BC278430  Festuca idahoensis John Thomas Howell 1934-7-8 12496 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC278436  Festuca idahoensis John Thomas Howell 1934-7-7 12471 Lassen Pine Creek Flat Comment
  CAS-BOT-BC278437  Festuca idahoensis John Thomas Howell 1934-7-6 12430 Lassen Hall's Flat Comment
  CHSC60932  Festuca idahoensis Vernon H. Oswald; Lowell Ahart 1993-7-8 5664 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Woods between the road and the railroad. 1709 Comment
  CHSC99482  Festuca idahoensis Lowell Ahart; John Dittes 2008-6-19 14880 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
  UC1024704  Festuca idahoensis Leo Whitney 1933-7-10 2140 Lassen ca 25 mi w Eagle Lake (upper end); Lassen National Forest, Halls Flat 1737 Comment
  UCD37476  Festuca idahoensis Beecher Crampton 1960-6-18 5715 Lassen Southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 Comment
  UCD65977  Festuca idahoensis L. Whitney 1935-6-23 3295 Lassen Fruit Growers Supply Co. Camp #10. Comment
  UC1024686  Festuca rubra Leo Whitney 1933-8-3 2159 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CHSC6252  Fragaria virginiana P. Balch 1955-6-1 Lassen Stephens meadows. 1905 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
  UCD39134  Frasera albicaulis Beecher Crampton 1964-6-26 7083 Lassen 32 miles n.w. Susanville west end of Harvey Valley. Comment
  HSC21366  Fremontodendron californicum J. J. Wagoner 1965-4-30 49 Lassen 16 mi. W of Child's Meadow, along Hwy. 36 Comment
  SEINET3886822  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.; 0 1067 Comment
  CHSC117191  Galium aparine Lowell Ahart; John Dittes 2016-6-7 21020 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UC1523737  Galium bolanderi Lisa Ganio 1981-6-17 24 Lassen Beaver Creek 1280 Comment
  UC1523745  Galium bolanderi Gary Schoolcraft 1981-7-21 543 Lassen ne Pittville (along Hwy 299) 1249 Comment
  CHSC93556  Galium boreale subsp. septentrionale Lowell Ahart; John Dittes 2005-6-2 11981 Lassen Long Valley, north side of a poor dirt road, 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
  UC1523797  Galium multiflorum Gary Schoolcraft 1982-6-22 747 B Lassen Ft. Sage Mtns. 1767 Comment
  UC585184  Galium multiflorum E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1740 Lassen e-facing slope of gully on mountain above Red Rock 1420 Comment
  HSC95185  Galium trifidum Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 523 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95186  Galium trifidum Gordon Leppig, Tony LaBanca 1997-6-29 540 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1025088  Galium trifidum Leo Whitney 1934-7-27 1745 Lassen near Bridge Creek (ca 7-8 mi sw of Eagle Lake); Lassen National Forest, Bridge Creek Camp 1737 Comment
  UC28233  Galium trifidum M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  RSA0105575  Galium trifidum subsp. columbianum Lowell Ahart, John Dittes 2013-7-23 18895 Lassen Along the south margin of the levee road, about 150 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS6562  Galium trifidum var. pacificum Brown and Wieslander 1922-7-30 46 Lassen Martin Sprs. Eagle Lake Comment
  RSA201314  Galium trifidum var. pusillum J. T. Howell 1959-9-23 34886 Lassen N end of Juniper Lake. 2058 Comment
  CAS-BOT-BC478879  Gayophytum John Thomas Howell; Gordon H. True 1973-7-31 50035 Lassen On road from Janesville to Thompson Peak, Diamond Range 1737 Comment
  UC1122620  Gayophytum diffusum subsp. parviflorum A. Simontacchi 1940-5-28 779 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET10453071  Gayophytum diffusum subsp. parviflorum Mary Susan Taylor 1982-8-19 Taylor 5023 Lassen T23N R17E ne sec 23? Beckwourth Pass quad. E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. Sagebrush Scrub; 4900 ft. 1493 Comment
  UC1186544  Gayophytum diffusum subsp. parviflorum J. W. MacSwain 1959-8-12 59 -148 Lassen 2 mi n Bridge Camp; Hat Creek Comment
  POM196436  Gayophytum heterozygum A. H. Kramer s.n. Lassen Prospect Peak Comment
  HSC63969  Gayophytum humile Teresa Prendusi 1980-7-1 1121 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  NY999656  Gayophytum ramosissimum J. T. Howell 1974-7-8 50463 Lassen Susanville 1295 Comment
  NY999655  Gayophytum ramosissimum W. W. Eggleston 1910-9-3 6301 Lassen Vicinity of Doyle Station 1240 Comment
  SEINET3287483 Image available Gayophytum ramosissimum Marcus E. Jones 1897-6-18 Lassen Chats. 1524 Comment
  UC878530  Gentiana newberryi A. A. Heller 1937-9-1 15341 Lassen about a mi e Westwood 1524 Comment
  HSC8435  Gentiana newberryi Fred J. Kindel 1955-8-1 Lassen Mt. Meadows Reservoir Comment
  UC725738  Gentianopsis simplex A. A. Heller 1942-9-7 16536 Lassen shore of Summit Lake, Lassen Volcanic Nat'l Park Lassen Volcanic Nat'l Park, Summit Lake Comment
  NY1101445  Geranium viscosissimum var. nervosum B. M. Bartholomew 1988-6-25 4372 Lassen Long Valley, southern end of the Warner Mountains. 2080 Comment
  HSC95165  Geum macrophyllum Gordon Leppig 1998-7-12 951 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC143568  Geum triflorum John Thomas Howell 1934-7-6 12441 Lassen Harvey Valley Comment
  CHSC68762  Geum triflorum Vernon H. Oswald; Lowell Ahart 1997-5-27 8504 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 bank of a creek paralleling the road. 1546 Comment
  CHSC68869  Geum triflorum Vernon Oswald; Lowell Ahart 1997-6-24 8649 Lassen South of Susanville at the pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  CHSC99305  Geum triflorum Lowell Ahart; John Dittes 2008-6-19 14872 Lassen Along a small wash, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UCD39130  Geum triflorum Beecher Crampton 1964-6-25 7067 Lassen 25 miles n.w. Susanville State Hwy. 44, Bogard Ranger Station, Lassen National Forest. 1722 Comment
  SBBG70512  Geum triflorum var. ciliatum E. Rockwell -Jun-1925 934 Lassen Eagle Lake 1554 Comment
  RSA0086587  Gilia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  SD107308  Gilia Christopher Davidson 1975-6-7 2756 Lassen 1.0 mile east of Beckwourth Pass on Highway 70. 1524 Comment
  RSA470172  Gilia brecciarum Christopher Davidson 1975-6-7 2757 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 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
  SEINET14626750  Gilia brecciarum subsp. brecciarum D. L. Neal 1960-5-7 R- 34 Lassen Red Rock area, ca 10 miles S of Doyle. 1463 Comment
  JEPS94702  Gilia inconspicua Vernon H. Oswald and Lowell Ahart 1998-5-22 9107 Lassen 5 mi nne of Doyle (Road to ORV parking area in Fort Sage Mountains, 0.5 mi e of Fort Sage Road); Fort Sage Mountains 1371 Comment
  CHSC25309  Gilia salticola Pauleen Broyles 1977-6-1 156 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 Comment
  CHSC25915  Gilia sinuata K. R. Stern 1967-7-1 2437 Lassen Murrer Meadow Road, ca. 2.5 mi SE of Eagle Lake Biology Station. 1554 Comment
  CHSC71242  Gilia sinuata Vernon H. Oswald; Lowell Ahart 1998-6-4 9146 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  CHSC99290  Gnaphalium palustre Lowell Ahart; John Dittes 2008-6-22 15032 Lassen About 120 yards west of the road levee, on the banks of a small natural drainage, open meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  CHSC117521  Gratiola ebracteata Lowell Ahart; John Dittes 2016-7-13 21129 Lassen Nortewest edge of the pond, 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
  CHSC29864  Gratiola ebracteata Robin L. Ondricek 1978-8-9 123 Lassen In mud at the ne edge of Mahogany Lake. 2057 Comment
  CHSC117760  Gratiola heterosepala Virginia Dains; Joanne Crawford 2016-6-9 Lassen Modoc Plateau. BLM Eagle Lake Field Office. 8 km southeast of Horse Lake, 23 km northwest of Shaffer Mtn. 1470 Comment
  UC1567419  Grayia spinosa G. Schoolcraft 1989-5-31 1882 Lassen e. end of Skedaddle's (near rd. to n.) 1280 Comment
  JEPS124633 Image available Grindelia nana Laurie Hooker 1965-7-13 117 Lassen 1.4 miles past junction of A-2 and 299. Comment
  CAS-BOT-BC388467  Gypsophila paniculata T. C. Fuller 1963-7-16 10923 Lassen Janesville Comment
  CDA34391  Gypsophila paniculata Anonymous 1987-6-17 Lassen Off US 395 near Janesville. 0 Comment
  HSC69598  Hackelia californica Gary Schoolcraft 1980-7-15 310 Lassen W of Biebes 1799 Comment
  POM72793  Hackelia micrantha Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1602195  Halogeton glomeratus Pryer and Fix 1948-8-17 Lassen Herlong Comment
  CDA38004  Halogeton glomeratus CDFA Staff 1991-1 s.n. Lassen Wendel. 0 Comment
  UCD98887  Halogeton glomeratus Les Berry; J. L. Myler 1954-8-17 s.n. Lassen Karlo. Comment
  UCD98891  Halogeton glomeratus Les Berry; J. L. Myler, Beecher Crampton 1954-8-17 s.n. Lassen near Karlo. Comment
  UCD98894  Halogeton glomeratus Thos. H. Kearney; John Thomas Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  UC88867  Helianthella californica subsp. nevadensis T. S. Brandegee 1882-7-1 Lassen Susanville Comment
  UCR57493  Helianthus annuus R. D. Goeden, Don W. Ricker 1989-8-22 890822- 9 Lassen Hwy 395 and Herlong Access Rd 1259 Comment
  UC32278  Helianthus annuus Baker and Nutting 1894-7-2 Lassen Comment
  JEPS94088  Helianthus bolanderi Vernon H. Oswald and Lowell Ahart 1998-9-8 9572 Lassen Hwy. 299 at R.R. overpass on e. side of Nubieber 1255 Comment
  JEPS25527  Helianthus cusickii Rimo Bacigalupi with Lincoln Constance 1959-6-16 7141 Lassen beside Hwy 395 one-fourth mi s of junction road to Smoke Creek 1341 Comment
  JEPS34877  Helianthus cusickii Joseph Grinnell 1929-6-8 Lassen s side Pete's Valley ((Valley which extends from Horse Lake to plains w of Shaffer Mt.)) Comment
  CAS-BOT-BC305663  Helianthus cusickii Elmer I. Applegate 1934-5-4 8927 Lassen South of Secret Valley Comment
  RSA302646  Helianthus cusickii J. R. Shevock 1972-5-20 1818 Lassen Near Johnsonville, Hwy 395. Comment
  JEPS1678  Hesperochiron californicus G. S. Crew and C. S. Robinson 1927-1 10 Lassen <Norval> Flat near Westwood Junction; Lassen Forest 1747 Comment
  JEPS94598  Hesperochiron californicus Vernon H. Oswald and Lowell Ahart 1997-5-27 8525 Lassen on Forest Route 38N04 4.7 mi ne Hwy. 139; Coyote Flat 1798 Comment
  NY1082478  Hesperochiron californicus N. H. Holmgren 1978-6-11 8910 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  SEINET5499704  Hesperochiron californicus N. H. Holmgren, P. K. Holmgren 1978-6-11 8910 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  UC1037238  Hesperochiron californicus Leo Whitney 1935-6-20 3253 Lassen Lassen Nat'l Forest, Fruit Grower's Supply Company, Camp 10 Comment
  CAS-BOT-BC180030  Hesperochiron pumilus E. K. Balls 1950-5-19 14770 Lassen Ash Creek Public Camp, off rd. from Adin to Madeline. Comment
  CHSC65038  Hesperolinon micranthum Vernon H. Oswald; Lowell Ahart 1995-7-5 6957 Lassen Modoc Plateau. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. 1383 Comment
  JEPS97309  Hesperolinon micranthum Vernon H. Oswald and L. Ahart 1995-7-5 6957 Lassen T30N R16E NW1/4 NW1/4 Sec. 7, 4540 ft, Modoc Plateau, Sagebrush Scrub. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395 1383 Comment
  UC1924195  Hesperolinon micranthum Debra Valov 2005-8-20 2005235 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UC17267  Hesperolinon micranthum Mrs. Brandegee Lassen 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
  UCR244106  Heterotheca villosa Jim Andre, G. L. Clifton 1993-6-9 19697 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
  RSA41674  Heterotheca villosa var. minor Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CAS-BOT-BC312417  Hieracium albiflorum Clare B. Hardham 1971-8-22 18378 Lassen Diamond Mountain 2133 Comment
  POM36066  Hieracium albiflorum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC312416  Hieracium albiflorum George W. Gillett 1957-7-24 895 Lassen Between Cameron Meadow and Snag Lake 1950 Comment
  CAS-BOT-BC318711  Hieracium horridum Lemmon 1874-9-1 s.n. Lassen Shasta Comment
  SEINET11262512  Hieracium nudicaule Robert L. Johnson, Mikel R. Stevens 2015-7-10 3938 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 1564 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
  SBBG8442  Hieracium scouleri H. and M. Dearing 1938-7-1 2247 C Lassen near Westwood Comment
  UC20698  Hippuris vulgaris J. Burtt Davy Jun 17 1897-Jun 24 1897 3334 Lassen Honey Lake Valley, Honey Lake 1219 Comment
  OBI75895  Holodiscus discolor var. glabrescens Anthony Baniaga 2011-8-17 506 Lassen Lassen Natl Forest. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E sec 31 SW of SW 1850 Comment
  UCD55283  Holosteum umbellatum subsp. umbellatum Ellen Dean; Gary Schoolcraft 2006-5-16 3102 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
  CAS-BOT-BC280893  Hordeum brachyantherum subsp. brachyantherum George W. Gillett 1957-7-29 951 Lassen Lassen Volcanic National Park. Trail between Butte Lake and Snag Lake 1859 Comment
  UCD85366  Hordeum brachyantherum subsp. brachyantherum Beecher Crampton 1954-7-5 2060 Lassen Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  CAS-BOT-BC284713  Hordeum jubatum John Thomas Howell 1973-7-10 49775 Lassen Fredonyer Pass 1737 Comment
  UC1137163  Hordeum jubatum August L. Hormay 1932-8-12 Lassen e edge Eagle Lake; Lassen National Forest, e edge Eagle Lake Comment
  UC1024656  Hordeum marinum subsp. gussoneanum Leo Whitney 1933-8-1 2198 Lassen ca 18 mi se Fall River Mills (Shasta County); Lassen National Forest, Black's Lake 1706 Comment
  CAS-BOT-BC289574  Hordeum marinum subsp. gussoneanum John Thomas Howell 1973-7-10 49804 Lassen Near Susanville on road to Jonesville, Sierra Nevada 1295 Comment
  CAS-BOT-BC284896  Hordeum murinum subsp. leporinum John Thomas Howell 1973-7-10 49801 Lassen Susanville 1295 Comment
  CAS-BOT-BC284897  Hordeum murinum subsp. leporinum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49208 Lassen Elysian Valley northwest of Janesville 1325 Comment
  UC538008  Horkelia fusca subsp. tenella Leo Whitney 1938-7-3 3038 Lassen Bogard Ranger Station Lassen National Forest 1767 Comment
  UC545661  Horkelia fusca subsp. tenella John Thomas Howell 1934-7-6 12433 Lassen Harvey Valley Comment
  POM34906  Horkelia fusca var. brownii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 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-BC55477  Hornungia procumbens Arnold Tiehm; Margaret Williams; Gary Schoolcraft 1986-5-12 10350 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 Comment
  CAS-BOT-BC213002  Hosackia crassifolia Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  UCD133302  Hymenoxys lemmonii J. E. Stuart Date Unknown 2154 Lassen 8 miles south of Constantia, Reno Highway. Comment
  UCD20362  Hymenoxys lemmonii Joe DiTomaso 2002-6-4 s.n. Lassen about 3 miles northwest of the junction between Nevada, Modoc and Lassen counties. Comment
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Apr 29 2013
  CHSC41841  Hypericum formosum var. scouleri P. V. Caldwell 1972-7-13 271 Lassen Eagle Lake. Growing scattered on edge of upper Papoose Creek above forest road to Papoose Meadows. Comment
  CHSC5007  Hypericum formosum var. scouleri L. G. Bennett 1967-7-8 123 Lassen Murrers Meadow, near Eagle Lake. 1493 Comment
  CHSC66726  Hypericum formosum var. scouleri Vernon H. Oswald; Lowell Ahart 1996-8-1 8127 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. Common on a wet, open meadowy slope in mixed coniferous forest on the downhill side of the road. 1737 Comment
  CAS-BOT-BC88621  Idahoa scapigera Doris Kildale Gillespie 1930-5-12 9338 Lassen 2 miles north of Susanville on road to Alturas. 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
  NY52523  Iliamna bakeri G. Schoolcraft 1983-8-3 1129 Lassen 5 miles w of Madeline 1767.8 Comment
  UCD126378  Iliamna bakeri Richard R. Halse 2004-7-8 6615 Lassen Along State Highway 139, around 6 miles north of Eagle Lake. 1710 Comment
  UC729644  Ipomopsis aggregata Carl B. Wolf 1929-9-1 3785 Lassen betw Grassy and Snag Lakes Mt. Lassen National Park Comment
  RSA748951  Ipomopsis congesta J. R. Shevock, Barbara Ertter 1986-7-20 11741 Lassen Ash Valley BLM Research Natural Area. Along Ash Valley Road about 16 miles W of Madeline and U.S. Hwy 395. 1550 Comment
  CHSC68895  Ipomopsis congesta subsp. montana Vernon Oswald; Lowell Ahart 1997-6-24 8637 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
  JEPS17345  Iris missouriensis W. L. Jepson 1918-8-4 7811 Lassen Horse Lake 1554 Comment
  CAS-BOT-BC69982  Isoetes bolanderi John Thomas Howell 1960-8-23 36431 Lassen Emerald Lake. 2468 Comment
  UC2062873  Isoetes nuttallii Forrest Freund 2016-5-19 258 Lassen Pappoose meadow. Comment
  UC2062875  Isoetes nuttallii Forrest Freund 2016-5-18 256 Lassen Side of Highway 44. Comment
  CAS-BOT-BC324777  Iva axillaris John Thomas Howell 1975-7-23 51394 Lassen Susanville, Sierra Nevada 1295 Comment
  CHSC57121  Ivesia paniculata Mary Meyer 1980-7-1 Lassen Ash Valley. 1402 Comment
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Jan 15 2009
  HSC75599  Ivesia paniculata Thomas W. Nelson, Jane Nelson 1980-7-6 5984 Lassen Ash Valley along Adin-Madeline Rd., 16 mi. E of Adin 1555 Comment
  SEINET6336292  Juncus balticus B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11503 Lassen Blue Door Flat, 7 or 8 miles east of Highway 395 on county road 510 1774 Comment
  UCD141331  Juncus balticus subsp. ater John Thomas Howell 1959-9-23 34881 A Lassen North end of Juniper Lake. 2057 Comment
  SEINET3877716  Juncus bufonius Arnold Tiehm, Jan Nachlinger; Gary Schoolcraft 1984-6-25 8824 Lassen Rodeo Flat, 2.7 road miles west of the state line on Buckhorn road from Ravendale to Highway 81.; 0 1829 Comment
  UC1567409  Juncus bufonius G. Schoolcraft 1989-7-18 1981 Lassen near Bucks Spring (s of Clarks Valley Road) 1874 Comment
  UC1609100  Juncus bufonius var. occidentalis Vernon H. Oswald and Lowell Ahart 1993-6-28 5598 Lassen ne of Poison Lake (Road 35N04 at Aspen Well, n of Hwy 44 on the nw edge of Harvey Valley); Harvey Valley, Aspen Well 1725 Comment
  CHSC108000  Juncus hemiendytus var. hemiendytus Lowell Ahart; John Dittes 2011-6-20 17480 Lassen About 15 yards west of the stream, about 40 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1608994  Juncus hemiendytus var. hemiendytus Vernon H. Oswald and Lowell Ahart 1993-6-3 5483 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y), 2.4 mi n of its jct with Lassen 21 (32N02) to Eagle Lake (on w edge of Pine Creek Valley, between Poison Lake and Susanville); Pine Creek Valley 1728 Comment
  RSA325011  Juncus luciensis A. Tiehm, Jan Nachlinger 1984-6-25 8824 Lassen Rodeo Flat, 2.7 miles west of the state line on Buckhorn road from Ravendale to Hwy 81 1829 Comment
  UC1100950  Juncus mexicanus Verne Grant and Irving Schneider 1947-7-30 8191 Lassen s point of w embayment Tule Lake Comment
  CHSC61072  Juncus nevadensis Vernon H. Oswald; Lowell Ahart 1993-8-3 5745 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. SW edge of the swamp. 1932 Comment
  HSC95223  Juncus nevadensis Gordon Leppig, J. Cromwell 1997-7-26 598 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1133633  Juncus nevadensis H. S. Yates 1936-8-12 6080 Lassen McKenzie Meadow Susanville 1524 Comment
  JEPS103213  Juncus nevadensis G. Schoolcraft 1993-6-21 2301 Lassen North slopes of Skedaddle Mountains 1828 Comment
  JEPS126524  Juncus uncialis Lowell Ahart, John Dittes 2016-6-7 21013 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  CHSC96722  Juncus xiphioides Gordon Leppig 1998-7-12 945 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  UC1134300  Juniperus occidentalis A. Simontacchi 1940-6-5 820 Lassen 8.0 mi wnw of Harvey Valley Ranger Station; Halls Flat Quad., Lassen National Forest Comment
  UC1134311  Juniperus occidentalis C. G. Albertus 1935-11-1 294 Lassen 2.1 mi ene Chats; Sierraville Quad. 1569 Comment
  UCR148432  Juniperus occidentalis David A. Charlet 1994-7-6 1923 Lassen Great Basin, Susanville, corner of Main and Fair Streets 1271 Comment
  UCR164307  Juniperus occidentalis Maile Neel 2000-4-29 G- 01 Lassen Northern Sierra Nevada Mountains, Lassen National Forest, six miles west of Susanville on Hwy 36, at intersection with Eagle Lake Road (A1) near Eagle Lake Ranger Station, 1400 Comment
  UCR164308  Juniperus occidentalis Maile Neel 2000-4-29 G- 3 Lassen Northern Sierra Nevada Mountains, Lassen National Forest, six miles west of Susanville on Hwy 36, at intersection with Eagle Lake Road (A1) near Eagle Lake Ranger Station, 1400 Comment
  SEINET10966161  Juniperus occidentalis Mary Susan Taylor 1974-5-4 Taylor 217 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
  RSA235556  Juniperus occidentalis var. occidentalis Noel Holmgren, Patricia K. Holmgren 1970-7-28 4625 Lassen North end of Petersen Mountain, near US 395, 8 miles north of Halleluja Junction (junction with Calif. 70). 1524 Comment
  RSA302156  Juniperus occidentalis var. occidentalis J. R. Shevock 1971-4-9 943 Lassen Hwy 299 1372 Comment
  RSA597841  Juniperus occidentalis var. occidentalis F. C. Vasek 1964-9-12 640912 -8 Lassen Road to Karlo, 3.8 miles from its junction with the Litchfield - Leavit Road Comment
  SEINET11056685  Juniperus occidentalis var. occidentalis D. Charlet 1994-7-6 1923 Lassen Susanville, corner of Main and Fair Streets. 1292 Comment
  UCR3791  Juniperus occidentalis var. occidentalis Frank C. Vasek 1964-9-12 640912- 09 Lassen US Hwy 395, at Hwy rest area 12.2 mi south of Ravendale Comment
  JEPS12481  Kelloggia galioides Brown and Wieslander 1922-7-18 53 Lassen near Susanville (Martins Springs); Martins Springs Comment
  POM68596  Kelloggia galioides Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC1136752  Kelloggia galioides George A. Fischer and Irwin H. Johnson 1933-7-14 255 Lassen Lassen National Forest 1783 Comment
  UC889305  Kelloggia galioides C. L. Hitchcock 1940-5-26 6602 Lassen ca 12 mi n Fall River Mills, Shasta County (on Fall River); Fall River 1371 Comment
  UCR268962  Kelloggia galioides Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31426 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  CDA42199  Kelloggia galioides T. C. Fuller 1963-7-15 10906 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  UC1483872  Kochia americana G. Schoolcraft 1980-5-8 231 Lassen s. end Cal-Neva Lake 1219 Comment
  CAS-BOT-BC180801  Kochia scoparia Louella Bass 1981-12-1 s.n. Lassen Standish Comment
  CHSC91190  Koeleria macrantha Lowell Ahart; John Dittes 2005-6-1 11860 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
  UC891450  Kyhosia bolanderi A. A. Heller 1937-9-1 15342 Lassen about a mile e of Westwood Comment
  CHSC5067  Lactuca serriola L. Stites 1967-7-4 122 Lassen Collects at Eagle Lake Biology Station. 1371 Comment
  CDA7521  Lactuca tatarica subsp. pulchella Lee Wheeler 1964-7-15 Lassen Around railroad station, Litchfield. 0 Comment
  CHSC117513  Lagophylla ramosissima Lowell Ahart; John Dittes 2016-7-13 21109 Lassen West of the pond, 80 yards east of Stonebreaker Road, 0.6 mile south of County Road A-2, 5.3 miles (air) east of Beiber, 7.3 miles 9air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1924221  Lagophylla ramosissima Debra Valov 2004-6-8 2004254 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CAS-BOT-BC341481  Lagophylla ramosissima Barrett Anderson 1986-7-9 3122 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  CDA18264  Lagophylla ramosissima subsp. ramosissima G. D. Barbe 1974-8-2 1926 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  RSA0036999  Lamium amplexicaule Lowell A. Ahart, John Dittes 2008-6-20 14962 Lassen About 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC81780  Lathyrus brownii unknown 1892-7-2 Lassen Susanville Comment
  POM277812  Lathyrus sulphureus Lyman Benson 1932-5-14 3584 Lassen Coarsegold 549 Comment
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Jul 2 2013
  CAS-BOT-BC321493  Layia glandulosa Noel H. Holmgren; Patricia K. Holmgren 1980-7-4 9506 Lassen Observation Peak, S side of mountain, 18 km (11 mi) airline distance E of Ravendale 1890 Comment
  CHSC5215  Layia glandulosa 1944-6-28 Lassen Eagle Lake. 1584 Comment
  CHSC91322  Layia glandulosa Lowell Ahart; John Dittes 2005-6-1 11889 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1433 Comment
  SEINET10759249  Layia glandulosa Billy Joe Cox 1971-6-2 Cox 3089 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  POM54275  Layia glandulosa subsp. glandulosa Milo S. Baker 1890-1 s.n. Lassen Milford. Comment
  CHSC99242  Lemna minuta Lowell Ahart; John Dittes 2008-6-22 15022 Lassen On shallow water, south side of the levee, about 50 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber. 1260 Comment
  SD117142  Lemna trisulca Wayne P. Armstrong 1984-8-25 1218 Lassen Willow Creek, at bridge on Highway 139, approximately10 miles north of Susanville. 1509 Comment
  CAS-BOT-BC88939  Lepidium dictyotum Arnold Tiehm 1980-5-29 5747 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air mile north-northwest of Wendel. 1231 Comment
  CHSC110310  Lepidium perfoliatum L. P. Janeway; B. Castro 2012-7-2 10926 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake; 0.6 km west of Wendel Road, 4.8 air km southeast of Wendel. 1221 Comment
  CHSC525  Lepidium perfoliatum J. Wakeman 1963-5-11 Lassen 1 mi. north of Honey Lake. Near Hot Springs. Comment
  CHSC80174  Lepidium perfoliatum Jeanne Boze 1981-6-11 105 Lassen Along shore of Horse Lake, about 11.5 mi from Hwy 139 on Horse Lake Road. 1542 Comment
  SFV1490  Lepidium perfoliatum I. L. Wiggins, D. B. Wiggins 1961-6-11 16332 Lassen 13.5 miles east of Susanville. 1240 Comment
  UC1126714  Lepidium perfoliatum A. Simontacchi 1940-6-8 829 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quad. 1706 Comment
  UCD115849  Lepidium perfoliatum R. Tofsrud 1951-7-13 s.n. Lassen Susanville area. 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
  CHSC29931  Leptosiphon ciliatus Robin L. Ondricek 1978-6-20 63 Lassen On the e side of the s end of Eagle Lake in the Gallatin Burn. 1.8 mi s of Five Corners. 2011 Comment
  RSA713121  Leptosiphon ciliatus L. P. Janeway, B. Castro 2005-7-10 8480 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01. 1859 Comment
  CHSC25901  Leptosiphon harknessii K. R. Stern 1967-6-24 2427 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC4771  Leptosiphon harknessii R. Carter 1967-6-27 562 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology station. 1584 Comment
  HSC25423  Leptosiphon harknessii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19252 Lassen Harvey Valley near Cone Springs Comment
  RSA702599  Leptosiphon harknessii L. P. Janeway 2004-7-26 8147 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
  UC70406  Leucocrinum montanum Milo S. Baker 1891-1 Lassen near Adin; Big Valley Comment
  UC773857  Leucocrinum montanum L. R. Short 1936-5-1 S- 342 Lassen Burgess Spring Experiment Range; Lassen Forest 1699 Comment
  CAS-BOT-BC508364  Leucocrinum montanum Ellsworth Bethel 1923-5-24 s.n. Lassen Poison Lake Comment
  CAS-BOT-BC508368  Leucocrinum montanum M. Lavin; K. Lavin 1982-5-16 4067 Lassen 1.5 miles east of Halleluja Jct., US 395, Sierra Nevada 1676 Comment
  SEINET3887154 Image available Leucocrinum montanum D. W. McNeal 1981-5-10 2488 Lassen Beside Hwy. #395, 4.3 mi. S. of Ravendale.; 0 Comment
  SEINET8480557  Leucocrinum montanum M. J. Williams 1969-5-24 s.n. Lassen Hwy 44, near Bogart Ranger Station. 1646 Comment
  CHSC71315  Lewisia nevadensis Vernon H. Oswald 1998-6-22 9231 Lassen Champs Flat Rd. (A-21) 1.8 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1749 Comment
  UC1136693  Lewisia nevadensis A. Simontacchi 1940-5-5 714 Lassen 10.2 mi e Coyote Spring; Lassen National Forest, Halls Flat quadrangle Comment
  CAS-BOT-BC283770  Leymus cinereus John Thomas Howell 1973-7-10 49770 Lassen Near Westwood 1554 Comment
  JEPS68547  Leymus cinereus W. L. Jepson 1918-8-2 7795 a Lassen Raker Ranch Honey Lake Valley 1219 Comment
  JEPS68548  Leymus cinereus W. L. Jepson 1918-8-2 7795 Lassen Constantia Honey Lake Valley 1219 Comment
  UC1037094  Leymus cinereus Leo Whitney 1933-7-16 2207 Lassen ca 16 mi w upper end of Eagle Lake; Lassen National Forest, Harvey Mountain Comment
  UC1609507  Leymus cinereus Vernon H. Oswald and Lowell Ahart 1993-6-14 5543 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach on w. shore of Eagle Lake (n. side of rd., ca 2.0 mi e.-n.e. of Spaulding Tract Rd. (Rd. 518, 33N89)) 1566 Comment
  UCD64241  Leymus cinereus L. Whitney 1933-7-16 Lassen Harvey Mt., Lassen Forest. 1828 Comment
  SEINET239973 Image available Leymus triticoides G. L. Clifton 1996-6-5 34630 Lassen East of Herlong close to the railroad. 1230 Comment
  JEPS96064  Ligusticum grayi Vernon H. Oswald and Lowell Ahart 1996-8-1 8127 .1 Lassen s.-s.w. Westwood (ca. 2 mi. n. of Dyer Mt. Lookout, Forest Rd. 28N56 (D-line), on downhill side of rd.) 1737 Comment
  JEPS88528  Lilaea scilloides Vernon H. Oswald and Lowell Ahart 1996-6-24 7878 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), in Papoose Creek where it leaves the n end of the meadow, Modoc Plateau); Modoc Plateau, Papoose Meadows 1633 Comment
  SD2783  Limnanthes douglasii Mary S. Snyder 1894-4-28 Lassen Lassen 518 Comment
  UC1609110  Limosella acaulis Vernon H. Oswald and Lowell Ahart 1993-6-14 5508 Lassen Lassen A21 (32N02) 5.3 mi e of Lassen 105 (32N28Y) ca 7 mi (air) w Eagle Lake (near Summit Camp); w of Eagle Lake 1889 Comment
  JEPS114652  Limosella aquatica Lowell Ahart, John Dittes 2008-6-20 14927 Lassen Bottom of vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  UC1609099  Limosella aquatica Vernon H. Oswald and Lowell Ahart 1993-6-28 5602 Lassen Rd 35N04 at Aspen Well n of Hwy 44 on the nw edge Harvey Valley (ne of Poison Lake); ne of Poison Lake 1725 Comment
  UC52823  Linanthus bolanderi M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixie Mts. Comment
  UC1123989  Linanthus ciliatus C. W. Hanks 1934-9-25 90 Lassen mts w Long Valley (near the Plumas National Forest); Sierraville Quad. 1767 Comment
  JEPS58441  Linanthus harknessii G. S. Crew and C. S. Robinson 1927-7-15 76 Lassen Feather Lake, sw Lassen County Feather Lake 1737 Comment
  UC1025087  Linanthus harknessii Leo Whitney 1934-7-5 1788 Lassen ca 15 mi w Eagle Lake (near Harvey Spring); Lassen National Forest, Crater Mountain 2225 Comment
  POM74794  Linanthus pungens subsp. pulchriflorus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 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
  CHSC5297  Linum lewisii var. lewisii W. Vinyard 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  CHSC61430  Linum lewisii var. lewisii Vernon H. Oswald; Lowell Ahart 1993-8-18 5832 Lassen Lassen Volcanic National Park. Summit ridge of Mt. Conard, near the S boundary of the park. Common in loose rock approaching the highest point on the ridge from the north. 2484 Comment
  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
  CAS-BOT-BC435427  Lithophragma glabrum John Thomas Howell 1934-6-14 s.n. Lassen Near Lost Lake, Warner Mts. 1524 Comment
  CHSC7762  Lithophragma glabrum Beverly J. Wise 1969-3-4 97 Lassen 80 yds west of Hwy 139, 1.4 mi. north of Susanville. 1584 Comment
  UC1483825  Lithophragma glabrum G. Schoolcraft 1980-4-8 201 Lassen e side Shaffer Mountain; e side Shaffer Mountain 1463 Comment
  SEINET12326115  Lithospermum californicum A. Seneres, Harold, N. 1983-1 104 Lassen Road 21 to Silver Lake. Lassen National Forest Comment
  UC1136831  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 Comment
  UC506915  Lithospermum ruderale George A. Fischer and Irwin H. Johnson 1933-7-19 F 262 Lassen Lassen; Sec. 2 1783 Comment
  SEINET10456166  Lithospermum ruderale Paul Gallian, David B. Dunn 1971-6-2 Gallian 463 Lassen 6 mi. N of Hallelujah Jct. on US Hwy 395. 1402 Comment
  SEINET8588539  Lomatium austiniae 2015-5-20 NV 030 -1059 Lassen Plumas Allotment. HWY 395 into CA, first median crossing after check station, go over median, right on Country lane, follow to end of road. 1520 Comment
  CHSC66229  Lomatium bicolor var. leptocarpum Vernon H. Oswald 1996-6-24 7855 Lassen Papoose Meadows located ca.0.5 mi E of Eagel Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  UC1123077  Lomatium bicolor var. leptocarpum Robert W. Gardner 1939-6-6 G- 28 Lassen Harvey Valley Halls Flat Quad., Harvey Valley Comment
  UC1609378  Lomatium bicolor var. leptocarpum Vernon H. Oswald and Lowell Ahart 1993-6-28 5620 Lassen e. Poison Lake (n. of Hwy. 44 along Rd. 33N47 at n.e. end of Little Harvey Valley, between Champs Flat and Harvey Valley, meadow bordering a drying branch of Pine Creek); Little Harvey Valley 1737 Comment
  POM78249  Lomatium donnellii Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  JEPS125805  Lomatium foeniculaceum subsp. macdougalii William Harnach 2010-6-8 1243 Lassen 2 miles west of the California Nevada state line, north side of Fort Sage Road, northeast of Doyle, CA. Comment
  CHSC57338  Lomatium macrocarpum B. G. Clark 1987-4-15 21 Lassen Slope 60 ft north side of Paul Bunyan Rd. 0.5 mi east of jct with Paiute Lane, Susanville. 1280 Comment
  RSA339995  Lomatium macrocarpum Noel Holmgren, Patricia Holmgren 1980-7-3 9487 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  SEINET10545797  Lomatium macrocarpum David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17756 Lassen Approx. 12 mi. S of Adin on CA Hwy. 139, in basalt & clay; along edge of road on rolling knoll, in Artemisia-Juniper assoc. 1372 Comment
  JEPS107470  Lomatium nevadense var. nevadense Lowell Ahart, John Dittes 2005-6-1 11847 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  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
  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
  CHSC68607  Lomatium ravenii Vernon H. Oswald; Lowell Ahart 1997-5-7 8404 Lassen Smoke Creek Ranch Rd. 2.9 mi east of Hwy. 395. 1359 Comment
  JEPS28836 Image available Lomatium ravenii Lincoln Constance and Emil DiFulvio 1962-4-16 3747 Lassen 1 mi. s. Ravendale 1615 Comment
  UC1187686 Image available Lomatium ravenii Tracey and Viola Call 1961-5-30 2048 Lassen ca. 2 mi. s. Ravendale 1463 Comment
  UCR267419  Lomatium ravenii Jim Andre, Glenn L. Clifton 1993-6-14 30002 Lassen northeast base of Shaffer Mountain near Secret Creek, c. 20 mi east-northeast of Susanville 1646 Comment
  SEINET7883783 Image available Lomatium triternatum Unknown 1986-1 86- 20 -1 Lassen Smoke Creek Rd., E of Hwy 395, T 30 N, R 16 E, Sec. 3 1433 Comment
  HSC28305  Lomatium utriculatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19255 Lassen Harvey Valley near Cone Springs Comment
  UC21281  Lomatium vaginatum Mrs. C. C. Bruce June 1898 2286 Lassen <Madaline> Plains Comment
  CHSC25905  Lotus K. R. Stern 1967-8-1 2436 Lassen California State Hwy. 139, 14 mi. N of Susanville. Comment
  JEPS126485  Lotus corniculatus Valda Lockie, Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemky 2015-7-16 CA 350 -049 Lassen Take Smoke Creek Road to Sand Pass Road. Turn left at Parker Reservoir. Comment
  RSA339993  Lotus humistratus Noel Holmgren, Patricia K. Holmgren, A. H. Holmgren 1980-7-3 9481 Lassen Madeline Plains, Westside Road, 9 km (5.6 mi) west of U.S. Highway 395, 16 km (10 mi) airline distance northwest of Termo. 1620 Comment
  RSA122900  Lotus unifoliolatus G. A. Fischer, Irwin H. Johnson 1933-7-12 193 Lassen Grass Valley 1695 Comment
  RSA122901  Lotus unifoliolatus L. R. Short, J. Warren 1936-6-23 S- 447 Lassen Burgess Spring, Exp Range. Comment
  POM253309  Lotus unifoliolatus A. A. Heller 1938-7-28 15300 Lassen Just east of Westwood. Comment
  CHSC110911  Ludwigia palustris Lowell Ahart; John Dittes 2012-7-9 18291 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
  CAS-BOT-BC198253  Lupinus John Thomas Howell 1976-7-19 51950 Lassen Southwest of Susanville on Gold Run Road 1341 Comment
  RSA0028052  Lupinus John F. Emmel 1996-7-14 1426 Lassen Long Valley; between Hwy. 395 and railroad tracks at south edge of Doyle. 1305 Comment
  RSA624904  Lupinus Jeffrey Huber 1971-6-2 110 Lassen 4 mi. S of Adin along Calif. Hwy. 139. Comment
  UC1181563  Lupinus albifrons R. F. Hoover 1940-10-1 4650 Lassen Johnstonville Comment
  UC126947  Lupinus arbustus Mrs. R. M. Austin and Bruce June 1898 2144 Lassen Madaline Plains Madaline Plains <Madeline Plains?>; High Mts. Madaline Plains <Madeline Plains?> Comment
  SEINET5327673  Lupinus arbustus H. Durio 1979-5-23 s.n. Lassen Meyers Ranch, Adin 1372 Comment
  SEINET5327728  Lupinus arbustus N. H. Holmgren, P. K. Holmgren 1978-6-11 8932 Lassen 2.4 km (1.5 mi) E of Rye Patch Canyon summit, 16 km (10 mi) airline distance SE of Ravendale. On N-facing slope 1830 Comment
  SEINET10903629  Lupinus arbustus subsp. arbustus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2590 Lassen Ca 6 miles s of susanville at junction of us hwy 395 and cal hwy 36 to Susanville, near johnstonville, assoc.; Purshia, artemisia 1311 Comment
  SEINET10484655  Lupinus arbustus subsp. calcaratus Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2577 Lassen 6 miles s of adin; along cal hwy 139 right-of-way; in basalt clay, grassy road Bank; artemisia, juniper assoc. 1372 Comment
  UC1542916  Lupinus argenteus G. Schoolcraft 1987-9-1 1773 Lassen Ash Valley RNA 1554 Comment
  CAS-BOT-BC208731  Lupinus argenteus var. heteranthus M. S. Taylor 1982-6-12 4653 Lassen Doyle, ca. 0.5 mi E of Hwy 395 Comment
  CAS-BOT-BC208743  Lupinus argenteus var. heteranthus Roxana S. Ferris; Rena Duthie 1919-6-13 18 Lassen Madaline Comment
  CAS-BOT-BC208755  Lupinus argenteus var. heteranthus W. W. Eggleston 1927-7-14 21511 Lassen Willow Creek, near Hayden Hill, Modoc Forest 1500 Comment
  CAS-BOT-BC208763  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-5-23 47353 Lassen Johstonville, 1 mile south, Highway 395 Comment
  NY736927  Lupinus argenteus var. heteranthus J. T. Howell 1974-7-8 50461 Lassen Susanville 1295 Comment
  NY736932  Lupinus argenteus var. heteranthus J. Huber 1971-6-2 140 Lassen 6 miles north of Hallelujah Jct. on U.S. Highway 395 1402 Comment
  RSA0037007  Lupinus argenteus var. heteranthus Lowell A. Ahart, John Dittes 2008-6-19 14873 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
  UC127554  Lupinus argenteus var. heteranthus Baker and Nutting 1894-7-30 Lassen near Bieber (Big Valley); , near Bieber Comment
  UC1537121  Lupinus argenteus var. heteranthus Gordon H. True Jr. 1936-6-27 556 Lassen near top Hot Spring Mountain; near top of Hot Spring Mountain 1828 Comment
  UC1924256  Lupinus argenteus var. heteranthus Debra Valov 2004-5-31 2004231 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UCD106820  Lupinus argenteus var. heteranthus Leo Whitney 1934-7-17 s.n. Lassen Lassen N. F. Comment
  HSC28310  Lupinus brevicaulis D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19280 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  RSA687493  Lupinus caudatus M. Bourell 1997-5-31 5879 Lassen Wendel Road 10.9 miles southeast of Highway 395. Comment
  SEINET3145129  Lupinus caudatus E. K. Balls 1950-5-9 15948 Lassen 6 mi S of Doyle 1372 Comment
  RSA3037  Lupinus confertus Carl B. Wolf 1931-9-6 2404 Lassen 0.5 mile from Jonesville on road to Wendel, western edge of Honey Lake Valley 1280 Comment
  JEPS126477  Lupinus holosericeus Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-7-28 CA 350 -068 Lassen Take 395 to Ravendale. Follow county road 527 to Buckhorn Byway. Follow for approximately 15 miles then turn right at the south end of Pilgrim Lake. Drive past two gates and through Painter's Creek. About 500 meters out of the creek on Painter's Flat. Comment
  SFV18614  Lupinus lepidus var. confertus T. W. Nelson, J. P. Nelson 1990-7-14 8776 Lassen Along State Route CA-395 at Janesville Road. Lassen County Site #3. 1250 Comment
  UC1982376  Lupinus lepidus var. confertus Richard R. Halse 2004-6-22 6670 Lassen Along U. S. Hwy. 395 ca. 7.8 miles southeast of Susanville. Comment
  SDSU4676  Lupinus lepidus var. confertus D. F. Howe 1960-9-21 2993 Lassen 2 miles north of Janesville on #395. 1219 Comment
  UC1137588  Lupinus lepidus var. lobbii A. Simontacchi 1940-6-30 909 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1523798  Lupinus lepidus var. sellulus Gary Schoolcraft 1982-8-14 854 Lassen along Hwy 139 near Upper McBride Sp (se of Adin); near Upper McBride Sp. 1584 Comment
  UC15910  Lupinus leucophyllus M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC201948  Lupinus leucophyllus Franklin P. Nutting Lassen flat near Eagle Lake; Flat near Eagle Lake Comment
  JEPS103203  Lupinus leucophyllus G. Schoolcraft 1994-6-9 2347 Lassen 1 1/2 mile NE of Hwy 139 on Grasshopper-Termo Road 1615 Comment
  SEINET10488726  Lupinus leucophyllus Charles Piper Smith 1947-6-13 Smith 47448 Lassen Highway 299, adin, 1.3 mi west Comment
  NY747411  Lupinus leucophyllus var. canescens M. S. Baker 1894-7-12 s.n. Lassen Pine Creek 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
  SBBG30552  Lupinus microcarpus var. microcarpus D. Myrick 1968-6-19 1957 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  UC15846  Lupinus microcarpus var. microcarpus Mrs. R. M. Austin and Bruce June 1898 2145 Lassen Madaline Plains Madaline Plains <Madeline Plains>; Madaline Plains Comment
  SBBG67020  Lupinus obtusilobus S. W. Hutchinson -Jun-1925 525 Lassen Eagle Lake 1554 Comment
  CHSC108001  Lupinus polycarpus Lowell Ahart; John Dittes 2011-6-20 17498 Lassen 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  POM24043  Lupinus polycarpus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  HSC76493  Lupinus polycarpus B. J. Cox, Paul Gallian 1971-6-2 2576 Lassen 6 mi. S of Adin, along Hwy. 139 right-of-way 1372 Comment
  SEINET10871085  Lupinus polycarpus Marcus E. Jones 1897-6-26 Jones s.n. Lassen Susanville, perkin's ranch. 1463 Comment
  HSC28314  Lupinus sellulus var. lobbii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19159 Lassen 3 mi. N of Westwood Comment
  RSA0105577  Lythrum tribracteatum Lowell Ahart, John Dittes 2013-7-23 18902 Lassen About 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA518416  Machaeranthera canescens var. canescens George K. Helmkamp 1990-9-23 G- 8 Lassen N of Ravendale 1677 Comment
  SEINET10872918  Machaerocarpus californicus Mary Susan Taylor 1982-6-12 Taylor 4647 Lassen T29N R10E ne/nw sec 13. Westwood quad. Aquatic in still pond on n side of West Fork of Susan River, s side of Hwy 36 at jct w/ Willow Cr Rd, 8 mi w Susanville. Comment
  UCSB48516  Madia Clare B. Hardham 1961-6-16 7451 Lassen collected at Gold Run Creek S of Susanville Comment
  CAS-BOT-BC342645  Madia citrigracilis John Thomas Howell 1934-7-8 12494 Lassen Spalding's, Eagle Lake 1584 Comment
  SFV7754  Madia citrigracilis T. Gordon, K. Kimbrough 1975-8-15 1214 Lassen 16 miles south of Adin. 1402 Comment
  CAS-BOT-BC343693  Madia elegans Elmer I. Applegate 1923-9-30 4034 Lassen Constantia Comment
  UC89448  Madia elegans W. E. Bryant Lassen Comment
  RSA518406  Madia elegans subsp. elegans George K. Helmkamp 1990-9-23 A- 6 Lassen 3 mi E of Susanville, along state road 36. 1345 Comment
  CAS-BOT-BC344300  Madia exigua G. Schoolcraft 1989-6-7 1903 Lassen Lower NE slopes of Shaffer Mtn. Comment
  CAS-BOT-BC512876  Maianthemum stellatum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49421 Lassen Elysian Valley, west of Janesville 1325 Comment
  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
  HSC63963  Malacothrix sonchoides Teresa Prendusi 1980-5-30 Lassen Mapes Spring on hillside 1555 Comment
  CHSC12430  Malva neglecta Robert W. Severin 1969-6-25 18 Lassen 1 3/4 mi e E.L.B.S. along road to Murrer's Upper Meadow, 1/2 mi from road to station. 1584 Comment
  JEPS124803 Image available Malva neglecta Lynne C. Carter 1967-7-11 82 Lassen 1.1 mile south of Millford on HWY 395, west of Honey Lake. Comment
  UCD116543  Malva neglecta P. B. Schultz 1967-7-11 72 Lassen 1 mile south of Milford on U.S. Highway 395. 1325 Comment
  CHSC106353  Marrubium vulgare Lowell Ahart; John Dittes 2010-8-30 17087 Lassen On the north side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west-southwest of Adin, about 7.3 miles (air) northeast of Bieber, Big Valley. 1274 Comment
  UC1124510  Marrubium vulgare A. Simontacchi 1940-7-20 933 Lassen Halls Flat Ranger Station , Halls Flat Quad. (Lassen National Forest) Comment
  CHSC112768  Matricaria discoidea Lowell Ahart; John Dittes 2013-7-22 18862 Lassen Drainage filled with dirt from construction of a pond, 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
  JEPS114634  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-20 14911 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  SEINET3816871  Matricaria discoidea Noel H. Holmgren, Patricia K. Holmgren 1980-7-5 9522 Lassen Upper smoke creek drainage, 20.4 km from U.S. highway 395 via Rye Patch Canyon, 24 km airline distance southeast of Ravendale, 1580 Comment
  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
  CHSC5216  Matricaria occidentalis P. Collett 1946-6-17 Lassen Eagle Lake. Willow Creek Valley. 1463 Comment
  CDA8327  Matricaria occidentalis T. C. Fuller 1963-6-1 10617 Lassen West side of road to Susanville, 2.0 miles south of Pittville. 0 Comment
  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
  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
  UCD37478  Melica fugax Beecher Crampton 1960-6-18 5726 Lassen Lassen County, southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 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
  JEPS94107  Mentzelia albicaulis Vernon H. Oswald and Lowell Ahart 1998-5-22 9137 Lassen ca. 3.5 mi. n. Doyle (Fort Sage Rd. 2.3 mi. n. of Hackstaff Rd.) 1341 Comment
  RSA7885  Mentzelia albicaulis H. A. Barker 1927-7-15 807 Lassen Desert east of Beckwith [Beckwourth], near highway. Comment
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Dec 30 2016
  SFV2375  Mentzelia albicaulis I. L. Wiggins, D. B. Wiggins 1961-6-10 16323 Lassen Sierra Nevada Along CA-Highway 36, about 6 miles west of Susanville. 1460 Comment
  JEPS107445  Mentzelia congesta Lowell Ahart, John Dittes 2005-6-1 11887 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
  UC1483878  Mentzelia congesta G. Schoolcraft 1979-6-26 95 Lassen s Buckhorn Rd.; ; SE1/4 1706 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
  CHSC5300  Mentzelia dispersa P. Balch 1955-7-22 Lassen Paul Bunyan Rd., 3 1/2 mi from Susanville toward Eagle Lake. 1889 Comment
  CHSC68893  Mentzelia dispersa Vernon Oswald; Lowell Ahart 1997-6-24 8603 Lassen South of Susanville on the north side of Diamond Mtn. at a stream on Forest Rd. 29N43, 3.5 miles east of Gold Run Rd. (29N10). 1655 Comment
  JEPS94543  Mentzelia dispersa Vernon Oswald and Lowell Ahart 1997-6-24 8603 Lassen s of Susanville (on n side of Diamond Mountain at a stream on Forest Road 29N43, 3.5 mi e of Gold Run Road); Diamond Mountain, Forest Road 29N43 1655 Comment
  UC1191589  Mentzelia dispersa Verne Grant, Irving Schneider 1947-8-1 8228 Lassen w end Section 19 (Irringation ditch running southwest into State Fish & Game nesting area.); Medelain Plain Comment
  CDA36642  Mentzelia dispersa T. C. Fuller 1963-7-15 10900 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  CHSC5301  Mentzelia laevicaulis M. West 1946-7-17 Lassen Antelope Grade, near Susanville. Eagle Lake. 1615 Comment
  HSC15839  Mentzelia laevicaulis Jim Vaughn 1956-8-17 Lassen Hwy. 36, 1 mi. W of Susanville. Comment
  POM83245  Mentzelia montana Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CHSC61179  Micranthes nidifica Vernon H. Oswald; Lowell Ahart 1993-5-12 5388 Lassen Hwy. 44 between Poison Lake and A21 (to Westwood), 1.6 mi SE of Pittsville Rd. Meadow on the S side of the road. 1719 Comment
  CAS-BOT-BC429081  Micranthes odontoloma Alice Eastwood 1912-8-22 1861 Lassen Trail from Morgans Springs to Lassen Butte Comment
  UC2026971  Microseris laciniata Anthony Baniaga 2011-7-9 434 Lassen Lassen National Forest. SW Pine Creek Valley Comment
  CAS-BOT-BC322656  Microseris laciniata Alice Eastwood; John Thomas Howell 1940-6-11 7998 Lassen Bieber Comment
  CAS-BOT-BC322657  Microseris laciniata G. Schoolcraft 1993-6-1 2274 Lassen Secret Creek area south of TulePatch Spring 1463 Comment
  SEINET10800109  Microseris laciniata Katherine L. Morris, Douglas G. LeDoux; David B. Dunn 1973-5-25 Morris 223 Lassen Collected in an area of sugar pine, Libocedrus, and yellow pine. 2.5 mi. N of Jct. 36 & Hwy 44. Comment
  CHSC66234  Microseris laciniata subsp. laciniata Vernon H. Oswald; Lowell Ahart 1996-6-24 7843 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. On the W side of the meadow just S of the cabins. 1633 Comment
  CHSC99295  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-20 14951 Lassen About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC99301  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-22 15036 Lassen About 220 yards west of the road levee, open dry meadow area, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  UC1609228  Microseris laciniata subsp. laciniata Vernon H. Oswald and Lowell Ahart 1993-6-28 5588 Lassen Harvey Valley Rd (33N02) 1.7 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1719 Comment
  OBI76978  Microseris nutans Anthony Baniaga 2011-8-4 486 Lassen Lassen Natl Forest. About 1/2 mi WNW of Griffith Hill along 30N21. Swain Mtn quad. T30N R8E sec 8 NE of NW 1907 Comment
  CHSC29930  Microsteris gracilis Robin L. Ondricek 1978-6-20 65 Lassen Callatin Burn, 1.8 mi s of Five Corners. 2011 Comment
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Jan 31 2011
  SEINET10902895  Microsteris gracilis Mary Susan Taylor 1974-5-4 Taylor 227 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  RSA104219  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-18 9803 Lassen Hills between Madeline and Likely 1524 Comment
  CDA41658  Mimulus breviflorus S. E. Schoenig 1998-7-5 98 -71 Lassen East side of Poison Lake, 50 meters west of Pitville Road, 1.8 miles northwest of Highway 44, east of railroad track and wet ditch. Comment
  CHSC60415  Mimulus breweri Mary Ann Showers 1992-6-13 2551 Lassen Shorline at western end of Widow Lake. Lassen Volcanic National Park. 2072 Comment
  POM252822  Mimulus floribundus A. A. Heller 1938-6-22 15185 Lassen 1 mi. south of Westwood. 1524 Comment
  JEPS23844  Mimulus inflatulus Peter H. Raven with Otto T. Solbrig 1958-6-17 13298 Lassen 4.8 mi s Madeline (along United States Highway 395) Comment
  UC1136833  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  CDA38387  Mimulus nanus S. E. Schoenig 1998-7-5 98 -72 Lassen By south side of Highway 44, vicinity of Bogard Campground. Comment
  POM181073  Mimulus nanus var. mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  UC124340  Mimulus nanus var. mephiticus Gustav Eisen 1891-1 Lassen Honey Lake Comment
  RSA59745  Mimulus nanus var. nanus N. N. Thompson 1950-5-19 14786 Lassen 16.5 mi. W of Madeline on rd. from Adin. 1677 Comment
  UC1025076  Mimulus primuloides Leo Whitney 1933-8-14 1595 Lassen meadow near Slate Creek (ca 8 mi nw of Eagle Lake); Lassen National Forest 1920 Comment
  HSC95323  Mimulus primuloides var. primuloides Gordon Leppig, Tony LaBanca 1997-6-28 516 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1778582  Mimulus pulsiferae S. E. Schoenig 1998-7-5 98 -69 Lassen SW shore of Moll Reservoir, 2 meters from waters edge. 1499 Comment
  RSA536397  Mimulus pygmaeus Beth Corbin, Steve Klukkert 1991-6-11 623 Lassen Harvey Valley, just NNE of Harvey Station. 1690 Comment
  RSA536398  Mimulus pygmaeus Beth Corbin, Kim Earll, Steve Klukkert 1991-7-2 634 Lassen 0.25 mile SE of Robbers Spring, 70 ft SSW of Hwy 44, 3.5 miles NW of USFS Bogard Work Center. 1098 Comment
  JEPS94112  Mimulus suksdorfii Vernon H. Oswald and Lowell Ahart 1998-5-22 9123 Lassen ca. 5 mi. n.e. Doyle (rd. to summit of Fort Sage Mts. 2.7 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1463 Comment
  UC1609384  Mimulus suksdorfii Vernon H. Oswald and Lowell Ahart 1993-6-14 5522 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd. (Rd 518, 33N89)); Eagle Lake 1566 Comment
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Nov 22 2007
  JEPS79150  Mimulus torreyi L. R. Heckard with R. Bacigalupi 1980-6-12 5255 Lassen ne Westwood (near golf course) 1554 Comment
  JEPS97367  Mitella pentandra Vernon H. Oswald and L. Ahart 1995-7-24 7142 Lassen T31N R7E NW1/4 NW1/4 Sec. 24, 6250 ft, High Cascade Range, Red Fir Forest. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor 1905 Comment
  CHSC65314  Monardella odoratissima subsp. glauca Vernon H. Oswald; Lowell Ahart 1995-8-14 7192 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittent stream, N of Susanville. 1676 Comment
  UCR244066  Monardella odoratissima subsp. glauca Jim Andre, G. L. Clifton 1993-6-9 19692 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CAS-BOT-BC213933  Monardella odoratissima subsp. pallida Clare B. Hardham 1969-8-28 17455 Lassen Slope west of Janesville, Sierra Nevada Comment
  CHSC118842  Monardella odoratissima subsp. pallida L. P. Janeway; B. Castro 2017-7-2 12340 Lassen Northern High Sierra Nevada. Along the crest of the Diamond Mtns 4.0 air-km west of Diamond Mtn; at the junction of skyline Motorway, Diamond Mtn Road, and Diamond Mtn Motorway. 2004 Comment
  POM103154  Monolepis spathulata Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC57311  Montia chamissoi Mary Meyer 1980-7-9 Lassen In Horse Camp Spring. 1706 Comment
  UC1101398  Montia chamissoi Malcolm A. Nobs, S. Galen Smith 1949-7-21 1064 Lassen 4 mi n of Madeline Comment
  UC1776709  Montia chamissoi G. Schoolcraft 1994-7-7 2452 Lassen About 1 mile W of Boot Lake 2194 Comment
  UC963894  Montia chamissoi Milo S. Baker 1952-5-23 12421 a Lassen e of Chester (Hwy 36) Comment
  NY497727  Montia chamissoi G. Schoolcraft 1982-6-16 703 Lassen Along Smoke Creek north of Shinn Ranch 1554.5 Comment
  POM312351  Montia chamissoi Malcolm A. Nobs, S. Galen Smith 1949-7-21 1064 Lassen Lassen County: Shallow marshy stream from springs, 4 miles N of Madeline Comment
  CHSC68758  Montia linearis Vernon H. Oswald; Lowell Ahart 1997-5-27 8497 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. Common in moist gravel on the flood plain of a small creek paralleling the road. 1546 Comment
  RSA0035909  Montia linearis Lowell A. Ahart, John Dittes 2008-6-20 14938 Lassen About 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1951065  Montia linearis Debra Valov 2007-5-22 2007075 Lassen Bieber, ca. 12 km east of Hwy 299 via County Rd A2. Comment
  HSC10386  Muhlenbergia asperifolia M. T. Milligan 1964-8-6 201 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  UC1137155  Muhlenbergia asperifolia August L. Hormay 1932-8-12 Lassen se edge of lake Lassen National Forest, Eagle Lake Comment
  UCD86528  Muhlenbergia asperifolia August L. Hormay 1932-8-12 s.n. Lassen Lassen National Forest. South E edge of Eagle Lake. Comment
  RSA256304  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-6-5 6237 Lassen 25 miles NW of Susanville along Hwy 44 in Lassen Nat'l Forest 1768 Comment
  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
  UC506980  Muhlenbergia richardsonis George A. Fischer and Irwin H. Johnson 1933-7-12 F 224 Lassen Stringer Mdw. Lassen National Forest 1722 Comment
  CHSC91191  Muilla transmontana Lowell Ahart; John Dittes 2005-6-1 11855 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
  CHSC66236  Myosotis micrantha Vernon H. Oswald; Lowell Ahart 1996-6-24 7880 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Along Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  CAS-BOT-BC392249  Myosurus John Thomas Howell 1976-7-20 52033 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  SEINET5338208  Myosurus aristatus M. J. Williams, G. Schoolcraft; A. Tiehm 1986-5-14 86- 38 -3 Lassen Tuledad Canyon Rd., from Duck flat to Ravendale. 0.1 mi W of Calif-Nev line. Comment
  CAS-BOT-BC83318  Myosurus minimus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49489 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  JEPS97413  Myosurus minimus Vernon H. Oswald and L. Ahart 1995-6-19 6895 Lassen T30N R16E southeast corner Sect. 6, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.9 mi e of Hwy. 395. Abundant on the drying beds of vernally flooded wetlands on a stony and brushy flat. 1383 Comment
  RSA0035919  Myosurus minimus Lowell A. Ahart, John Dittes 2008-6-20 14940 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
  SEINET200135 Image available Myriophyllum exalbescens Verne Grant, Irving Schneider 1947-7-30 8195 Lassen W end of Tule Lake. 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
  HSC22985  Nama aretioides John Pratt 1970-7-5 67 Lassen 1250 Comment
  RSA0043136  Nama aretioides var. californica Christopher Davidson 1975-6-7 2760 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UC133072  Nama aretioides var. multiflora Dr. Gustav Eisen 1891-1 Lassen Honey Lake Comment
  POM126780  Nama densa Franklin P. Nutting s.n. Lassen Eagle Lake. Comment
  CHSC60903  Nama densa var. densa Vernon H. Oswald; Lowell Ahart 1993-7-8 5658 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 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
  CHSC9067  Navarretia Silas Carr 1970-6-24 126 Lassen E. edge of road entering N. portion of Murrers Meadow. Comment
  CHSC89734  Navarretia breweri L. P. Janeway 2004-6-26 8143 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
  UC125019  Navarretia breweri T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  UC1609320  Navarretia breweri Vernon H. Oswald and Lowell Ahart 1993-6-28 5592 Lassen 1.7 mi n Hwy 44 (Harvey Valley Rd (33N02), e side of Grays Valley) 1719 Comment
  SJSU8608  Navarretia breweri P. L. Billings 1965-7-12 Lassen by Hwy 139 5 mi NE of Susanville 1158 Comment
  UCD32675  Navarretia breweri Beecher Crampton 1954-7-6 2080 Lassen Lassen County, 3 miles north of Madeline, along US highway 395. 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
  CHSC117215  Navarretia intertexta subsp. intertexta Lowell Ahart; John Dittes 2016-6-7 20995 Lassen On the west side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC89736  Navarretia intertexta subsp. intertexta L. P. Janeway 2004-6-26 8144 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
  JEPS106521  Navarretia intertexta subsp. propinqua L. P. Janeway 2004-6-26 8144 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
  JEPS114394  Navarretia intertexta subsp. propinqua Lowell Ahart, John Dittes 2008-6-22 15031 Lassen about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber 1262 Comment
  JEPS17720  Navarretia intertexta subsp. propinqua Rimo Bacigalupi with G. T. Robbins 1955-7-19 5373 Lassen 10.3 mi se Adin (along Ash Valley road between Adin and Madeline) 1524 Comment
  JEPS19816  Navarretia intertexta subsp. propinqua Rimo Bacigalupi with S. Galen Smith 1957-6-28 5991 Lassen 7 mi n Madeline (just e of U.S. Highway 395 (about 1 mi n of Sage Hen siding on S.P. Railroad)) 1676 Comment
  UCD37480  Navarretia intertexta subsp. propinqua Beecher Crampton 1960-6-20 5731 Lassen Lassen County, Lassen National Forest, 0.5 mile south of Black's Mountain USDA and Forest Service Experimental Station, 11 miles northwest of Bogard Ranger Station. 1706 Comment
  JEPS70408  Navarretia intertexta subsp. propinqua W. L. Jepson 1918-8-5 7815 Lassen near South Fork Peak (camp at summit road) 1645 Comment
  UCD32676  Navarretia intertexta subsp. propinqua Beecher Crampton 1954-7-6 2081 Lassen Lassen County, 3 miles north of Madeline, along US highway 395. Comment
  JEPS121308  Navarretia leucocephala subsp. leucocephala Lowell Ahart 2013-7-22 18851 Lassen 10 yards S of the man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  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
  JEPS127174  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2016-7-15 21213 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  NY1012788  Navarretia leucocephala subsp. minima N. H. Holmgren 1980-7-3 9470 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 miles) south of Madeline. 1620 Comment
  SEINET3860230  Navarretia leucocephala subsp. minima Leigh A. Johnson 2006-1 06 -142 Lassen Lassen Natl. Forest; along west side of dirt road leading to Champs Flat from Hwy 44 (across from county road A21), 3.7 miles from jct with Hwy 44.; 0 1716 Comment
  UC1112253  Navarretia leucocephala subsp. minima R. C. Bacigalupi with S. Galen Smith 1957-6-28 6001 Lassen 3.1 mi s Madeline (Highway 395); Madeline Plains 1615 Comment
  UC1137761  Navarretia leucocephala subsp. minima August L. Hormay 1934-5-15 Lassen 2 mi n Eldridge's; Lassen Forest 1524 Comment
  UC1537488  Navarretia leucocephala subsp. minima Gordon H. True Jr. 1936-6-25 528 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  UC23681  Navarretia leucocephala subsp. minima J. Burtt Davy Jun 17 1897-Jun 24 1897 3362 Lassen Honey Lake Valley Comment
  UC23714  Navarretia leucocephala subsp. minima M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  CAS-BOT-BC230389  Navarretia leucocephala subsp. minima Lincoln Constance 1946-7-3 s.n. Lassen Madeline Station Comment
  SEINET2440301  Navarretia linearifolia subsp. linearifolia Leigh A. Johnson 2006-7-2 06 -138 Lassen Lassen Nat. Forest, Long Lake vicinity. Off Hwy 44 at mile marker 20.74 (just E of jct between 44 and county road A21). Along shore between trees and water's edge, particularly at point where spur from Hwy 44 connects with road next to lake.; 0 1736 Comment
  UC1184061  Navarretia linearifolia subsp. linearifolia Jean Langenheim 1957-6-22 4368 Lassen Said Valley Said Valley (northeastern part Lassen County) Comment
  SEINET12319552  Navarretia minima L. B. Barlow 1967-1 82 Lassen 6 mi N Susanville, Hwy 139 1524 Comment
  CHSC110778  Navarretia sinistra subsp. sinistra Dean Wm. Taylor 2012-7-18 21281 Lassen Cascade Ranges. Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 miles S of Adin). 1706 Comment
  CHSC115600  Navarretia sinistra subsp. sinistra Lowell Ahart; John Dittes 2015-7-14 20521 Lassen Northwest of the pond, east part of the camping area, west side of Childs Meadow, 0.67 air-miles west of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.21 air-miles southeast east of Doe Mt., 10.41 air-miles south of Lassen Peak. 1498 Comment
  UCSB30253  Nemacladus interior Hardham, Clare 1961-6-16 Lassen Gold Run Creek south of Susanville Comment
  JEPS2980  Nemophila parviflora var. austiniae L. Constance 1938-6-10 2324 Lassen 0.5 mi w Fredonyer Pass (junction of Crazy Harry and Westwood--Susanville Roads); w of Fredonyer Pass 1676 Comment
  UC67087  Nemophila parviflora var. austiniae T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  POM73805A  Nemophila parviflora var. austiniae Marcus E. Jones 1897-7-1 s.n. Lassen Susanville at Perkin s Ranch. 1524 Comment
  CHSC117190  Nemophila pedunculata Lowell Ahart; John Dittes 2016-6-7 21010 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valleuy Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  JEPS118279  Nemophila pedunculata Lowell Ahart, John Dittes 2011-6-20 17481 Lassen On old gopher mounds, meadow, about 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  POM73805B  Nemophila pedunculata Marcus E. Jones 1897-7-1 s.n. Lassen Susanville at Perkin s Ranch. 1524 Comment
  CHSC4786  Neoholmgrenia andina R. Carter 1967-6-29 572 Lassen On roadside, N side of Rd. Along road to Murrer's Meadow, Eagle Lake. 1584 Comment
  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
  SEINET6174383  Nicotiana attenuata A. Kowal, D. Mathews, S. Massed, S. Batiuk, B. Kalb 2011-8-10 NV 030 -594 Lassen Constantia fire, Constantia Road off Highway 395 1344 Comment
  JEPS124603 Image available Nicotiana attenuata G. R. Ostrander 1965-7-12 256 Lassen Growing along U. S. 395 15 miles N. of the junction of Calif. 70 & U. S. 395. 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
  UC1609113  Nothocalais troximoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5504 Lassen Champs Flat Rd. (Lassen A21/105, Forest 32N02) 1.8 mi n Hwy 44 (between Poison Lake and Susanville) 1749 Comment
  UC1186579  Oenothera deltoides subsp. piperi G. I. Stage and R. W. Thorp 1959-6-19 59 -113 Lassen 7.2 mi se Milford Comment
  RSA27327  Oenothera flava C. L. Hitchcock 1940-5-26 6642 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  SEINET3150416  Oenothera tanacetifolia E. K. Balls 1950-5-9 15954 Lassen 5 mi. S of Modoc Co. line, Hwy 395 1219 Comment
  UCR248227  Onopordum acanthium D. B. Joley 1976-6-16 001 Lassen West side of Grasshopper Lake, on Hwy 139, 33 mi north of Susanville. 1626 Comment
  SD243287  Onopordum acanthium D. B. Joley 1976-6-16 21 Lassen Grasshopper Lake 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
  CHSC105235  Orobanche californica subsp. jepsonii Lowell Ahart; John Dittes 2010-7-31 16985 A 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
  CHSC65153  Orobanche corymbosa Vernon H. Oswald; Lowell Ahart 1995-7-5 6956 Lassen Modoc Plateau. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. 1383 Comment
  HSC24668  Orobanche vallicola John Pratt 1970-7-5 64 Lassen 1250 Comment
  SD52193  Orthocarpus copelandii var. cryptanthus F. Stephens 1894-7-15 8115 Lassen Bunch Grass Spring 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
  CHSC27677  Orthocarpus cuspidatus subsp. cryptanthus Jerry Sndgrass 1978-6-28 5 Lassen Lower Dry L., E of Eagle L. 1645 Comment
  JEPS9435  Orthocarpus cuspidatus subsp. cryptanthus Brown and Wieslander 42 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  UC1523713  Orthocarpus cuspidatus subsp. cryptanthus Gary Schoolcraft 1981-7-6 616 Lassen near top Goodrich Mtn.; near top of Goodrich Mtn. 1828 Comment
  CHSC13864  Oxypolis occidentalis Mary Meyer 1973-7-7 20 Lassen Located at NE end of Murrer's Upper Meadow. 1572 Comment
  CAS-BOT-BC316809  Packera cana Alice Eastwood; John Thomas Howell 1940-6-15 8313 Lassen Upper Willow Creek East of Hayden Hill Comment
  UCD134780  Packera eurycephala Michael A. Vincent 1999-6-9 8581 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
  UC35937 Image available Packera indecora M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
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Sep 26 2006
  CAS-BOT-BC317058  Packera multilobata Elmer Ivan Applegate 1897-6-3 867 Lassen south of Madeline plains Comment
  UC1037307  Packera pauciflora Leo Whitney 1934-7-24 1583 Lassen 7-8 mi sw of Eagle Lake (Bridge Creek Camp near Bridge Creek); Lassen National Forest, Bridge Creek Camp 1737 Comment
  CAS-BOT-BC317146  Packera streptanthifolia G. Schoolcraft 1986-6-4 1600 Lassen About 1 mile west of Nevada stateline. 1341 Comment
  CAS-BOT-BC10388  Paeonia brownii Margaret Williams; Steven Williams 1974-7-26 74- 2 -14 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70. 1493 Comment
  HSC26234  Paeonia brownii D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19260 Lassen Harvey Valley near Cone Springs Comment
  UC485769  Paeonia brownii H. E. and S. T. Parks June, 1928 223 Lassen Drakesbad Lassen National Park Comment
  JEPS104125  Panicum capillare Lowell Ahart 2003-8-17 10517 Lassen On the w side of the paved road, on the e side of Highway 36, ca 1/4 mi sw of the Susan River, ca 8 mi (air) sw of Susanville. 1433 Comment
  CAS-BOT-BC259612  Pascopyrum smithii James Jokerst 1983-7-25 1898 Lassen Near Madeline Plains 1614 Comment
  CHSC107348  Pastinaca sativa Lowell Ahart; John Dittes 2011-6-22 17537 Lassen On both sides of Pumpkin Center Road (County Road 417), 1,257 feet east of intersection of fir Street, just east of Bieber, Big Valley. 1255 Comment
  SEINET10456341  Pectocarya penicillata Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 874 Lassen Collected 3 mi N of Milford on Hwy 395 at Honey Lake campgrounds. Comment
  JEPS94131  Pectocarya setosa Vernon H. Oswald and Lowell Ahart 1998-5-22 9098 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd., 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  HSC20935  Pedicularis groenlandica H. E. Parks, S. T. Parks Jun 1928 251 Lassen Lassen National Park, Drakesbad 1677 Comment
  POM44032  Pedicularis semibarbata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UC2042972  Pedicularis semibarbata Barbara Ertter 1990-5-13 8965 Lassen McCoy Road N of Westwood, 3 mi from junction with A21, ca. 6 air miles N of Westwood. Comment
  JEPS7229  Penstemon Jos. Grinnell 1928-6-26 Lassen Cinder Cone, SE slope 2103 Comment
  JEPS8094  Penstemon davidsonii var. davidsonii W. L. Jepson 1910-6-11 4117 Lassen Cinder Cone 2133 Comment
  SBBG85835  Penstemon deustus F. W. Pennell 1940-6-9 25768 Lassen below basaltic ridge, hill W of Susanville 1371 Comment
  POM203059  Penstemon deustus subsp. sudans J. T. Howell 1934-6-10 11880 Lassen 12 miles N of Susanville, on road to Horse Lake. Comment
  HSC81803  Penstemon deustus var. pedicellatus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6035 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
  JEPS107844  Penstemon deustus var. pedicellatus Lowell Ahart, John Dittes 2005-6-2 11979 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
  CHSC23498  Penstemon gracilentus Wayne O. Baum 1971-7-7 71 -85 Lassen E. slope of Gallatin Peak. 1981 Comment
  CHSC29258  Penstemon gracilentus J. D. Prouty 1978-6-28 11 Lassen E of Eagle L., at W shore of Lower Dy L. Comment
  HSC69068  Penstemon gracilentus Gary Schoolcraft 1980-8-13 352 Lassen N face of Diamond Mtn., S of Susanville 1982 Comment
  POM44652  Penstemon gracilentus Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UC1063186  Penstemon gracilentus A. Simontacchi 1940-6-20 851 Lassen 4.1 mi w Harvey Mountain Lookout; Lassen National Forest, Hall's Flat Quad. Comment
  UC477494  Penstemon gracilentus A. G. Brenneis 1928-7-3 9 Lassen Jesson Valley Lassen Forest, Jesson Valley 1463 Comment
  CAS-BOT-BC245656  Penstemon janishiae G. Schoolcraft 1997-8-6 2660 Lassen Diamond Mtn. 2316 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
  UC1063177  Penstemon neotericus H. P. Hagge 1929-9-12 30 Lassen Logan Mtn. Eagle Lake Quadrangle 1828 Comment
  UC1523710  Penstemon neotericus Gary Schoolcraft 1981-7-9 502 Lassen e slope of Roop Mtn. Comment
  RSA257090  Penstemon newberryi Christopher Davidson 1974-7-23 2497 Lassen Lassen Volcanic Nat'l Park. Rd to Juniper Lake. 2134 Comment
  SEINET3836566 Image available Penstemon newberryi subsp. newberryi Marcus E. Jones 1897-7-7 Lassen Lassen's Peak 1829 Comment
  CHSC59571  Penstemon roezlii Mary Meyer 1980-5-20 524 Lassen Along ridge above Secret Creek. 1432 Comment
  HSC81496  Penstemon roezlii Thomas W. Nelson, Jane Nelson 1980-7-6 6021 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir. 1585 Comment
  NY641730  Penstemon roezlii R. G. Olmstead 1984-6-27 582 Lassen 10.3 miles east from U.S. 395 pm Rye Patch Canyon road. 1603.3 Comment
  NY650137  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen East of Fredonyer Pass 1615.4 Comment
  POM252932  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen East of Fredonyer Pass. 1646 Comment
  SBBG28920  Penstemon roezlii D. D. Keck 1954-7-23 954 Lassen 12 mi W of Susanville 1676 Comment
  UC690327  Penstemon roezlii John Thomas Howell 1934-6-10 11877 Lassen on road to Horse Lake 12 mi n Susanville; n of Susanville on road to Horse Lake Comment
  UC690374  Penstemon roezlii David D. Keck and J. Clausen 1935-6-24 3727 Lassen 5 mi s Likely ((Modoc Co.)); s of Likely 1400 Comment
  NY641729  Penstemon roezlii A. J. Cronquist 1959-6-17 8470 Lassen 50 miles southeast of Susanville. 1371.6 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-BC239498  Penstemon rydbergii var. oreocharis John Thomas Howell 1976-7-20 s.n. Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC239501  Penstemon rydbergii var. oreocharis Robert W. Gardner 1937-6-20 G - 19 Lassen Lassen National Forest, Burgess Spring 1699 Comment
  CHSC12412  Penstemon rydbergii var. oreocharis Lynn R. Thomas 1969-6-20 136 Lassen Dean's Meadow, ca. 6 mi. s of E.L.B.S. 1950 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
  JEPS79151  Penstemon rydbergii var. oreocharis L. R. Heckard with R. C. Bacigalupi 1980-6-12 5256 Lassen large meadow just ne Westwood (near golf course); ne of Westwood 1554 Comment
  NY651264  Penstemon rydbergii var. oreocharis F. W. Pennell 1940-6-10 25774 Lassen Route 36, road to Coppervale R.S., east of Westwood 1493.5 Comment
  SJSU7940  Penstemon rydbergii var. oreocharis R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline Comment
  UC506978  Penstemon rydbergii var. oreocharis George A. Fischer and Irwin H. Johnson 1933-7-12 F 228 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1737 Comment
  CHSC4438  Penstemon speciosus K. R. Stern 1967-6-30 2449 Lassen West Central side of Eagle Lake. 1554 Comment
  JEPS101465  Penstemon speciosus Dean W. Taylor 1974-6-14 3721 Lassen Janesville Grade road about 4 miles SSW Janesville, Plumas National Forest 1706 Comment
  NY660809  Penstemon speciosus N. H. Holmgren 1980-7-5 9518 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
  SBBG30645  Penstemon speciosus D. Myrick 1968-6-19 1955 Lassen Hwy 395, 6 mi S of Ravendale 1524 Comment
  UC1036208  Penstemon speciosus George W. Gillett July 1953 273 Lassen Fredonyer Pass Lassen National Forest, Fredonyer Pass (Highway 36) 1752 Comment
  RSA305777  Penstemon speciosus James R. Shevock 1972-5-20 1815 Lassen Near Ravendale, Hwy 395. 1220 Comment
  RSA38458  Penstemon speciosus Philip A. Munz 1947-5-19 11877 Lassen Hwy 395, 3.5 miles S of Ravendale. 1616 Comment
  SBBG54516  Penstemon speciosus F. W. Pennell 1940-7-23 26254 Lassen 2 mi N of jct with St Hwy 24, NE of Plumas Comment
  CAS-BOT-BC239660  Penstemon sudans A. A. Heller 1938-6-23 15194 Lassen 2 miles east of Fredonyer Pass 1645 Comment
  CAS-BOT-BC239666  Penstemon sudans John Thomas Howell 1974-7-9 50479 Lassen Between Susanville and SW end of Eagle Lake 1828 Comment
  CAS-BOT-BC243409  Penstemon sudans David D. Keck 1930-7-23 948 Lassen Susanville 1280 Comment
  CAS-BOT-BC243410  Penstemon sudans David D. Keck 1930-7-23 953 Lassen Four miles west of Susanville, Sierra Nevada 1463 Comment
  CHSC43495  Penstemon sudans Lowell Ahart; John Thomas Howell 1974-7-9 531 Lassen Along Eagle Lake Road, about 3 1/2 miles north-west of Susanville. 1584 Comment
  JEPS109636  Penstemon sudans Dean W. Taylor 2002-6-21 18167 Lassen Highway 139 about 4 miles North from Lassen College (ca. 5 miles N of Susanville) 1478 Comment
  UC1036207  Penstemon sudans George W. Gillett 1953-7-13 274 Lassen Highway 36 one mi e Fredonyer Pass; Lassen National Forest, e of Fredonyer Pass 1706 Comment
  UC27436  Penstemon sudans J. Burtt Davy Jun 17 1897-Jun 24 1897 3401 Lassen Willow Creek , Willow Creek (Honey Lake Valley) Comment
  SEINET7356257  Penstemon venustus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3935 Lassen E of Freydonyer Pass. 6.2 rd mi west on Hwy 36 after jct with Hwy 44. S side of rd. Ca 11 air mi wsw of Susanville.; 0 1659 Comment
  HSC100163  Peraphyllum ramosissimum J. P. Smith, & J. O. Sawyer 2011-8-14 13378 Lassen Along service road to transmitter facility, 3.2 mi. W of Hwy. 395. Comment
  NY850110  Peraphyllum ramosissimum G. Schoolcraft 1984-6-11 1207 Lassen Hills east of Bull Flat 1585 Comment
  POM91106  Peraphyllum ramosissimum Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 6 miles north. 1524 Comment
  CHSC27656  Perideridia bolanderi Jerry Snodgrass 1978-7-11 54 Lassen Papoose Creek, SE corner of Eagle L. 1584 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
  CAS-BOT-BC423344  Peritoma platycarpa Elmer I. Applegate 1934-5-3 8923 Lassen South of Secret Valley Comment
  CHSC41840  Persicaria P. V. Caldwell 1972-7-12 281 Lassen Eagle Lake. Growing along entire length on Papoose Creek on the muddy banks. Comment
  CHSC77223  Persicaria lapathifolia G. Schoolcraft 1996-9-11 2560 Lassen Lower end of Willow Creek below petroglyphs and above dam. 1341 Comment
  RSA38630  Phacelia adenophora P. A. Munz 1947-5-19 11874 Lassen 19 miles south of Ravendale. 1341 Comment
  RSA38631  Phacelia adenophora P. A. Munz 1947-5-19 11871 Lassen 19 miles south of Ravendale. 1341 Comment
  RSA38634  Phacelia adenophora P. A. Munz 1947-5-19 11879 Lassen Highway 395, 4 miles south of Madeline. Comment
  UCD120554  Phacelia adenophora Beecher Crampton 1964-6-27 7092 Lassen West of Termo, Madeline Plains. Comment
  NY1052542  Phacelia bicolor W. W. Eggleston 1911-5-29 6742 Lassen Vicinity of Doyle Station 1290 Comment
  SJSU11244  Phacelia hastata J. W. Tilden 1960-6-27 1499 Lassen foot of Moonlight Rd, outskirts of Westwood 1524 Comment
  CHSC93554  Phacelia hastata subsp. compacta Lowell Ahart; John Dittes 2005-6-2 11950 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. 1498 Comment
  UC24403  Phacelia hastata subsp. compacta J. Burtt Davy Jun 17 1897-Jun 24 1897 3407 Lassen Chat Honey Lake Valley, Long Valley Comment
  CHSC5260  Phacelia heterophylla subsp. virgata A. Santos 1946-6-25 Lassen Spalding's Eagle Lake Resort. 1558 Comment
  CHSC91193  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11952 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  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
  UCD55292  Phacelia heterophylla subsp. virgata Ellen Dean; Gary Schoolcraft 2006-5-16 3113 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1274 Comment
  CHSC28594  Phacelia humilis M. S. Taylor 1974-7-9 266 Lassen Scattered ca 3 ft e side of Whitehead Rd, ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  CHSC4910  Phacelia humilis A. E. Anderson 1967-6-23 5 Lassen Around Eagle Lake Biological Station. 1554 Comment
  JEPS118501  Phacelia humilis A. Holmen 2011-8-12 CA 320 -92 Lassen US Hwy 395 South to Termo. Turn East onto Lassen Co. Rd 508 (Juniper Ridge Rd). Continue approximately 11 miles to Cold Springs Rd and head north for 3 miles. Turn and travel about 1 mile. Collection site is along road. Comment
  JEPS2126  Phacelia humilis C. S. Robinson 1927-6-25 Lassen near Westwood Jct. (sw Lassen Co.); Lassen N. F., Norval Flat 1747 Comment
  CHSC68891  Phacelia humilis var. humilis Vernon H. Oswald; Lowell Ahart 1997-6-24 8620 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. 2036 Comment
  RSA427992  Phacelia humilis var. humilis Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CHSC5264  Phacelia inundata J. B. Kimsey 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  CHSC12417  Phacelia linearis Anne Linda Brisk 1969-6-25 20 Lassen Growing behind Shepherd's Hall at ELBS. 1554 Comment
  CHSC67059  Phacelia linearis Willis Ball 1969-6-28 55 Lassen Found on E.L.B.S. in dry basaltic soil. 1554 Comment
  SBBG64994  Phacelia linearis S. W. Hutchinson -Jun-1925 395 Lassen Eagle Lake 1554 Comment
  POM203782  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 miles S of Ravendale. Comment
  NY1056434  Phacelia lutea var. glandulifera N. H. Holmgren 1980-7-3 9473 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) west of U.S. Higwhay 395 from a turnoff 10.3 km (6.4 mi) south of Madeline 1620 Comment
  SEINET5519007  Phacelia lutea var. glandulifera N. H. Holmgren, P. K. Holmgren 1978-6-11 8931 Lassen Upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale. 1700 Comment
  NY1056436  Phacelia lutea var. glandulifera P. A. Munz 1947-5-19 11879 Lassen Highway 395 4 miles south of Madeline Comment
  JEPS4041  Phacelia mutabilis Frances D. Payne 1929-7-12 85 Lassen ridge above Lost Lake; Warner Mountains 2438 Comment
  UC506976  Phacelia mutabilis George A. Fischer, Irwin H. Johnson 1933-7-12 F 226 Lassen Lassen <National> Forest 1722 Comment
  UC107462  Phacelia racemosa Mrs. R. M. Austin 1879-1 Lassen Eagle Lake Comment
  CHSC29886  Phacelia ramosissima var. eremophila Robin L. Ondricek 1978-8-2 109 Lassen In moss covered basalt on top of the ridge se of ELFS. 1609 Comment
  CAS-BOT-BC179912  Phacelia thermalis Peter H. Raven; Otto T. Solbrig 1958-6-17 13297 Lassen Hwy 395, 4.8 miles south of Madeline Comment
  SEINET3091880 Image available Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young. 1984-6-7 8595 Lassen Flats on the Northwest side of Shaffer Mountain, 9 air miles North-northwest of Litchfield. 1372 Comment
  UC526141  Phacelia thermalis John Thomas Howell 1934-6-16 12222 Lassen Bieber Comment
  HSC93434  Phalaris arundinacea Vernon H. Oswald, L. Ahart 1996-8-1 8108 Lassen Mtn. Meadows Reservoir SW of Westwood 1540 Comment
  CHSC41845  Phleum pratense P. V. Caldwell 1972-7-12 272 Lassen Eagle Lake. On banks from Eagle Lake to Papoose Meadows on Papoose Creek. Comment
  UC1776695  Phleum pratense G. Schoolcraft 1994-8-2 2407 Lassen About 1.5 miles SW of Boot Lake 2011 Comment
  JEPS91153  Phlox douglasii subsp. rigida Dean W. Taylor 1974-6-14 3715 Lassen Poison Lake, on Hwy 44 ca. 2 miles W from the junction with Pittville Road 1615 Comment
  RSA0035915  Phlox gracilis Lowell A. Ahart, John Dittes 2008-6-20 14929 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
  UC1124221  Phlox gracilis A. Simontacchi 1940-5-10 690 Lassen 7.3 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1137763  Phlox gracilis August L. Hormay 1934-5-9 Lassen Black Mt. Headquarters Lassen National Forest 1706 Comment
  CHSC23546  Phlox hoodii subsp. canescens Wayne O. Baum 1971-6-28 71 -35 Lassen S. slope of Gallatin Peak. 2042 Comment
  CHSC52771  Phlox hoodii subsp. canescens L. P. Janeway 1990-7-4 3765 Lassen Dry gravelly bench near eas-side of saddle ca 0.8 mi NE of Meadowview Peak. 1981 Comment
  NY963723  Phlox speciosa LeDoux 1973-5-25 867 Lassen Collected 3 miles north of Milford, on Highway 395 at Honey Lake campgrounds Comment
  CHSC108023  Phlox speciosa subsp. occidentalis Lowell Ahart; John Dittes 2011-6-20 17506 Lassen About 40 yards north of the dirt road, about 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  POM75677  Phlox speciosa subsp. occidentalis Marcus E. Jones 1897-6-28 10531 Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA715614  Phlox speciosa subsp. occidentalis L. Ahart, John Dittes 2005-6-1 11846 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  RSA59557  Phlox speciosa subsp. occidentalis E. K. Balls 1950-5-22 14826 Lassen 10.8 miles SE of Susanville, 1.1 miles SE of Buntingville, W of Honey Lake 1280 Comment
  UC1237939  Phlox stansburyi John Weiler and A. P. Nelson May 26 1961-May 29 1961 61237 Lassen behind motel at Ravendale (on U.S. Hwy 395) Comment
  JEPS94479  Phoenicaulis cheiranthoides Vernon H. Oswald and Lowell Ahart 1997-5-27 8490 Lassen 38.2 mi n of Susanville (e side of Highway 139 at a small farm pond, 7.4 mi n of Eagle Lake Road, at a pullout along the highway); Highway 139 1627 Comment
  UC72905  Phoenicaulis cheiranthoides Milo S. Baker 1890-1 Lassen Milford Comment
  CHSC117545  Phoradendron bolleanum Lowell Ahart; John Dittes 2016-7-13 21136 Lassen 5 yards south of the gate to the pond, along 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
  CHSC5247  Phyllodoce breweri 1946-7-12 Lassen Silver Lake. 1981 Comment
  CHSC6220  Pinus contorta subsp. murrayana P. Balch 1955-7-3 Lassen Eagle Lake Resort. 1615 Comment
  HSC23512  Pinus contorta var. murrayana L. B. Barlow 1967-7-14 125 Lassen E shore of Silver Lake 1829 Comment
  SEINET10530757  Pinus jeffreyi Jeffrey Huber 1971-6-2 Huber 141 Lassen 6 mi N of Halleluja Jct on US Hwy 395, in Artemesia tridentata, Pinyon pine, Jeffrey pine along high ridge and in sandy wash. 1402 Comment
  SEINET10859539  Pinus lambertiana Paulson 1970-7-21 PAULSON s.n. Lassen 28N 6 E-19 Comment
  CHSC21478  Pinus monticola M. S. Taylor 1975-7-16 841 Lassen On trail between Echo Lake and Summit Lake, Lassen National Park. 2133 Comment
  RSA518540  Pinus ponderosa George K. Helmkamp 1990-10-4 12 Lassen South of Susanville in Plumas National Forest; north of Milford Pass. 1463 Comment
  CHSC110891  Plagiobothrys cusickii Lowell Ahart; John Dittes 2012-7-9 18284 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS119652  Plagiobothrys cusickii Lowell Ahart, John Dittes 2012-7-9 18284 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS120895  Plagiobothrys cusickii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18772 Lassen About 300-400 yards NW of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS87184  Plagiobothrys cusickii Vernon H. Oswald and Lowell Ahart 1992-7-16 5113 Lassen between Old Station and Susanville (Bridge Creek entering McCoy Flat Reservoir on s. side of Hwy. 44); Bridge Creek 1691 Comment
  RSA0105587  Plagiobothrys cusickii Lowell Ahart, John Dittes 2013-7-22 18870 Lassen 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CAS-BOT-BC224972  Plagiobothrys hispidulus John Thomas Howell 1934-7-7 12479 Lassen Harvey Valley Comment
  UC1137645  Plagiobothrys hispidulus A. Simontacchi 1940-5-21 757 Lassen 4.1 mi sse Blacks Mountain; Halls Flat Quad., Lassen National Forest Comment
  UC25081  Plagiobothrys hispidus M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  RSA517278  Plagiobothrys hispidus Barbara Ertter, Gary Schoolcraft 1987-6-16 7190 Lassen Skeedaddle Mtns on NE side of Honey Lake, talus slopes at base of rimrock on S side of Hot Springs VABM 2287 Comment
  UC1584021  Plagiobothrys kingii var. harknessii G. Schoolcraft 1990-6-12 2088 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC1523740  Plagiobothrys mollis Gary Schoolcraft 1981-8-11 559 Lassen Silva Flat Reservoir 1706 Comment
  RSA337274  Plagiobothrys scouleri Noel Holmgren, Patricia K. Holmgren 1980-7-3 9476 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi.) west of U.S. Highway 395 from a turnoff 10.3 km (6.4 mi.) south of Madeline 1616 Comment
  RSA39738  Plagiobothrys scouleri var. hispidulus P. A. Munz 1947-5-20 11891 Lassen Milford. 1265 Comment
  CHSC117209  Plagiobothrys tenellus Lowell Ahart; John Dittes 2016-6-7 21006 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
  CHSC71079  Plagiobothrys tenellus Vernon H. Oswald; Lowell Ahart 1998-5-22 9093 Lassen Hwy. 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  SJSU9125  Platanthera dilatata var. leucostachys H. L. Buckalew 1961-7-2 Lassen Blue Lake near Blue Lake Road Comment
  UC1037205  Platanthera leucostachys Leo Whitney 1933-8-8 1562 Lassen ca 8 mi nw Eagle Lake (spring at bed of Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  UC1951081  Plectritis congesta subsp. brachystemon Debra Valov 2009-4-24 2009010 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC4905  Plectritis macrocera Bill Wilson 1967-6-23 17 Lassen Collected at Eagle Lake Biological Station, 10 mi. N of Susanville, outside laboratory building. 1584 Comment
  UC1924225  Plectritis macrocera Debra Valov 2004-6-8 2004249 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 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
  CHSC7736  Pleiacanthus spinosus Beverley J. Wise 1969-5-23 79 Lassen 33.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  HSC79990  Pleiacanthus spinosus William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UC768477  Pleiacanthus spinosus Robert F. Hoover 1940-9-28 4630 Lassen Susanville Comment
  CHSC7691  Poa Beverley J. Wise 1969-6-4 124 Lassen 10 mi. east of Susanville (Janesville), cut in hill next to cemetery. 1310 Comment
  UCD92183  Poa George A. Fischer; Irwin H. Johnson 1933-7-14 F 245 Lassen Patterson Flat - Lassen Nat'l Forest. 1737 Comment
  CAS-BOT-BC254942  Poa bulbosa John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49187 Lassen Elysian Valley NW of Janesville 1325 Comment
  RSA300130  Poa compressa J. T. Howell 1974-7-10 50553 Lassen Elysian Valley; Sierra Nevada 1326 Comment
  UC1024877  Poa compressa Leo Whitney 1935-5-26 3147 Lassen 10 mi e Adin (Ash Creek) Comment
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Jun 24 2009
  UCD37475  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen Lassen County, 6 miles southeast of Jess Valley, 3 miles east of Blue Lake, southern Warner Mountains. 2133 Comment
  JEPS107983  Poa cusickii subsp. cusickii Lowell Ahart, John Dittes 2005-6-2 11927 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  JEPS120878  Poa cusickii subsp. cusickii Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18780 Lassen About 300-400 yards NW of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CAS-BOT-BC254649  Poa cusickii subsp. pallida John Thomas Howell 1934-6-14 12175 Lassen Near Lost Lake, Warner Mountains 2438 Comment
  CDA2366  Poa pratensis A. A. Beetle 1941-6-28 2797 Lassen 10 miles west of Chester. Comment
  JEPS107465  Poa pratensis subsp. pratensis Lowell Ahart, John Dittes 2005-6-1 11848 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UCR244104  Poa pratensis subsp. pratensis Jim Andre, G. L. Clifton 1993-6-9 19698 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
  JEPS126492  Poa secunda Jennifer Mueller, A. Brambila July 6-15, 2016 CA 370 -227 Lassen Head south through Eagleville, CA to Bare Ranch. Comment
  RSA647529  Poa secunda Marion P. Harthill 1972-6-17 821 Lassen Madeline. 1677 Comment
  UCD90322  Poa secunda A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3365 Lassen Nubieber. Comment
  CAS-BOT-BC236259  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5456 Lassen 5 miles E of Westwood on road to Fredonyer Pass 1584 Comment
  CAS-BOT-BC237715  Poa secunda subsp. juncifolia J. B. Davy 1897-6-1 3319 Lassen Honey Lake Valley Comment
  CAS-BOT-BC251087  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49460 Lassen Elysian Valley, west of Janesville 1325 Comment
  UC1024912  Poa secunda subsp. juncifolia Leo Whitney 1935-6-26 3370 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1037128  Poa secunda subsp. juncifolia Leo Whitney 1935-6-19 3259 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1136986  Poa secunda subsp. juncifolia L. R. Short and D. Gish 1936-6-5 S- 373 Lassen Burgess Spring Experimental Range; Lassen Forest 1798 Comment
  UCD92408  Poa secunda subsp. juncifolia R. Tofsrud 1947-7-24 225 Lassen Between Ravendale and Thermos. Comment
  UCD92427  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-26 s.n. Lassen Near Fruit Grower's Supply Co., Camp 10. Comment
  HSC79825  Poa secunda subsp. secunda William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  JEPS107471  Poa secunda subsp. secunda Lowell Ahart, John Dittes 2005-6-1 11845 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
  UC1024933  Poa secunda subsp. secunda Leo Whitney 1935-6-28 3344 Lassen Bieber Comment
  UC127313  Poa secunda subsp. secunda Milo S. Baker Lassen Dixie Valley Comment
  UCD91638  Poa secunda subsp. secunda A. L. Hormay 1941-6-26 37 Lassen Lassen National Forest. Pine Creek, Bogard Ranger Station. 1706 Comment
  UCD92016  Poa secunda subsp. secunda A. H. Shunk 1923-1 14 Lassen Hayden Hill. Comment
  SEINET7873582  Poa secunda subsp. secunda J. A. Young 1978-4-13 s.n. Lassen Meyers Ranch. Comment
  UC1136984  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Forest 1859 Comment
  UC773972  Poa wheeleri L. R. Short 1936-4-28 S- 340 Lassen Burgess Spring Experiment Range; Lassen Forest 1767 Comment
  CHSC110774  Pogogyne floribunda Dean Wm. Taylor 2012-7-18 21276 Lassen Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 miles S of Adin). 1706 Comment
  RSA0036995  Polemonium micranthum Lowell A. Ahart, John Dittes, Todd Sloat 2013-6-8 18743 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
  OBI48165  Polemonium micranthum Rhonda Riggins 1989-4-27 1644 Lassen US 395, 14 mi N Litchfield, 21 mi S Ravendale 1311 Comment
  JEPS17614  Polemonium occidentale Rimo Bacigalupi 1955-7-20 5404 Lassen on grade 2.3 mi s Patterson Ranger Station ([and 0.8 mi s of Lassen-Modoc county line], meadowy spots along East Creek, southern end of the Warner Mountains); Modoc National Forest, Warner Mountains, East Creek 2011 Comment
  CDA20360  Polyctenium fremontii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; No other data provided. 0 Comment
  NY182307  Polyctenium fremontii var. confertum G. Schoolcraft 1984-7-9 1287 Lassen South of Fillman Road, 3.8 miles west of Hwy 395 1609.3 Comment
  SEINET3197107 Image available Polyctenium fremontii var. confertum Gary Schoolcraft 1984-7-9 1287 Lassen South of Fillman Road, 3.8 miles west of Hwy 395 1610 Comment
  CHSC117761  Polygala subspinosa Virginia Dains; Joanne Crawford 2016-6-14 Lassen Modoc Plateau. BLM Eagle Lake Field Office. 20 km northeast of Skedaddle Mtns, 11 km east of Highway 395, 1.5 km north of Smoke Creek Ranch Road. 1432 Comment
  CAS-BOT-BC419770  Polygonum argyrocoleon Luella Bass 1976-9-1 s.n. Lassen Willard Creek w. of Susanville Comment
  UC849110  Polygonum bistortoides A. A. Heller 1938-6-23 15141 Lassen 2 mi e Westwood Comment
  CAS-BOT-BC414490  Polygonum douglasii John Thomas Howell 1974-7-10 50562 Lassen Elysian Valley 1325 Comment
  CHSC105243  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1137781  Polygonum douglasii subsp. spergulariiforme August L. Hormay 1934-7-2 Lassen 1/4 mi nw Black's Mtn. Headquarters; Lassen National Forest 1706 Comment
  UC850047  Polygonum douglasii subsp. spergulariiforme M. S. Baker and F. Nutting 1894-1 Lassen Lassen Co. Comment
  RSA0011553  Polygonum esotericum Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46999 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  JEPS50618  Polygonum persicaria W. L. Jepson 1939-8-11 19377 Lassen Milford 1280 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
  CHSC112396  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18732 Lassen Drainage filled with dirt form construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  HSC82191  Polygonum polygaloides subsp. confertiflorum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6041 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  CHSC29856  Polygonum polygaloides subsp. kelloggii Robin L. Ondricek 1978-7-5 81 Lassen In grass and among trees along the ne edge of Mahogany Lake. 2057 Comment
  CHSC61056  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald; Lowell Ahart 1993-8-3 5749 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. In small patches of more of less bare ground along the E side of the swamp. 1932 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
  UC1136188  Polygonum sawatchense subsp. sawatchense A. Simontacchi 1940-5-28 780 Lassen 3.2 mi wsw Patterson Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  JEPS120125  Polypogon monspeliensis Lowell Ahart, John Dittes 2012-7-9 18300 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
  UC526144  Porterella carnosula John Thomas Howell 1934-7-7 12466 Lassen near Feather Lake; near Feather Lake Comment
  JEPS108444  Porterella carnosula Lisa Schultheis 1995-6-27 229 -95 Lassen W side of Rt. 395, 3.5 mi S of Madeline. Comment
  SEINET10460760  Porterella carnosula Eggleston 1927-7-11 EGGLESTON 21476 Lassen Bogard Ranger Station, Lassen Forest 1500 Comment
  SEINET10460827  Porterella carnosula Hormay 1934-5-14 HORMAY s.n. Lassen T32N R9E 1676 Comment
  SJSU3186  Porterella carnosula R. L. Fisher 1958-6-16 s.n. Lassen six miles south of Madeline, Madeline Plains, northeastern Lassen County 1615 Comment
  UCD150403  Potamogeton crispus William Anderson 1963-7-9 s.n. Lassen Honey Lake Refuge. Comment
  UC1609364  Potamogeton diversifolius Vernon H. Oswald and Lowell Ahart 1993-7-8 5666 Lassen ne edge of Poison Lake (2.4 mi n of Hwy 44, Pittville Road (Lassen 111, 36N01)) 1705 Comment
  RSA748317  Potamogeton natans K. M. Meyer, A. Townesmith 2007-7-21 146 Lassen Lassen National Forest. 1.3 mile on Road 10 to Silver Lake off Road 110. Pine forest, lake. 1963 Comment
  HSC17770  Potamogeton natans Fred J. Kindel 1955-7-14 Lassen Mt. Meadows Reservoir Comment
  HSC17771  Potamogeton natans Fred J. Kindel 1955-7-14 Lassen Mt. Meadows Reservoir Comment
  CAS-BOT-BC453914  Potamogeton pectinatus Verne Grant; Irving Schneider 1947-9-6 8380 Lassen North arm of Eagle Lake 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
  CHSC5044  Potentilla glandulosa subsp. nevadensis L. B. Barlow 1967-7-4 87 Lassen 5 mi s of Eagle Lake Biological Station on Gallatin Beach Road. 1737 Comment
  CHSC4985  Potentilla gracilis var. fastigiata R. Clicquennoi 1967-6-24 12 Lassen NW corner of Eagle Lake on highway 139. 1524 Comment
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  CHSC113015  Potentilla gracilis var. flabelliformis Lowell Ahart; John Dittes 2013-7-23 18899 Lassen Along a small drainage, west of the road levee, 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
  SEINET10540584  Potentilla klamathensis Katherine L. Morris 1973-5-25 Morris 253 Lassen 27.7 miles nw of the junction of hwy 36 and 44 on hwy 44, at robber's spring, In an open meadow on one side of the hwy with yellow pine, white fir and open On the other side Comment
  CAS-BOT-BC158518  Potentilla millefolia John Thomas Howell 1934-7-6 12456 Lassen Harvey Valley Comment
  POM366603  Potentilla millefolia Christopher Davidson 1975-6-6 2721 Lassen 2.8 miles W of Bogard Work Center and roadside rest on Hwy 44. 1684 Comment
  CHSC75533  Poteridium annuum Vernon H. Oswald; Lowell Ahart 1999-6-9 9760 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass. Roadside. 1645 Comment
  CHSC1579  Prunus andersonii A. Stone 1937-5-14 Lassen Honey Lake region. Comment
  JEPS94135  Prunus andersonii Vernon H. Oswald and Lowell Ahart 1998-5-22 9119 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 1.1 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1447 Comment
  CAS-BOT-BC154614  Prunus subcordata John Thomas Howell 1974-7-8 50496 Lassen Susanville 1295 Comment
  CAS-BOT-BC239796  Pseudoroegneria spicata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CAS-BOT-BC239797  Pseudoroegneria spicata John Thomas Howell 1934-6-14 12166 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CAS-BOT-BC239801  Pseudoroegneria spicata John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50693 Lassen South and southeast of Diamond Mt. 2286 Comment
  JEPS127720  Pseudoroegneria spicata Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -175 Lassen 171 west from 385 south. After the second tight switchback the population is off the road downslope. Comment
  POM112808  Pseudoroegneria spicata subsp. spicata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC120048  Pseudostellaria jamesiana unknown 1892-7-2 Lassen Susanville Comment
  JEPS127273  Psilocarphus brevissimus var. brevissimus Lowell Ahart, John Dittes 2016-7-13 21110 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  JEPS30616  Psilocarphus brevissimus var. brevissimus Peter H. Raven with Otto T. Solbrig 1958-6-17 13284 Lassen along United States Highway 395 1.9 me s Ravendale Comment
  CAS-BOT-BC361754  Psilocarphus brevissimus var. brevissimus H. D. Ripley; R. C. Barneby 1944-5-30 5961 Lassen North of Viewland 1371 Comment
  CHSC105259  Pterospora andromedea Lowell Ahart; John Dittes 2010-7-31 17007 Lassen On the sout side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  RSA32005  Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen About 2 miles E of Westwood 1524 Comment
  CAS-BOT-BC460510  Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen About a mile E of Westwood 1524 Comment
  CHSC93243  Puccinellia lemmonii John Dittes; Scott Chamberlain 2004-6-28 1015 Lassen Modoc Plateau; Long Valley; ca. 2.2 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1445 Comment
  UCD91890  Puccinellia lemmonii Freed W. Hoffman 1946-5-28 1820 Lassen Beiber. Comment
  SEINET4890224  Puccinellia lemmonii N. H. Holmgren, P. Holmgren 1978-6-13 8939 Lassen 2.7 km (1.7mi) north-west of Wendel. 1250 Comment
  UCD93433  Puccinellia nuttalliana G. Schoolcraft 2000-6-12 2908 Lassen Cold Springs Reservoir at NE end of Madeline Plains. 1645 Comment
  CHSC25129  Purshia tridentata Paul Lyman 1970-5-2 29 Lassen Bald Mountain; Janesville. On south slope of Bald Mountain, 10 miles East of Susanville. Comment
  SEINET10904099  Purshia tridentata Mary Susan Taylor 1974-1 Taylor 260 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC147815  Purshia tridentata var. tridentata D. B. Dunn; B. J. Cox 1971-6-2 17784 Lassen 6 mi. N. of Hallelujah Jct. on U.S. Hwy 395 1402 Comment
  CAS-BOT-BC147822  Purshia tridentata var. tridentata Margaret Williams; Steven Williams 1974-7-26 74 -L-19 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  JEPS44640  Purshia tridentata var. tridentata Frank W. Peirson 1932-7-20 10355 Lassen 20 mi se Susanville 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
  UC1924592  Purshia tridentata var. tridentata Debra Valov 2006-5-28 2006002 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1284 Comment
  CAS-BOT-BC462755  Pyrola dentata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville. Perkin's Ranch 2133 Comment
  UC35843  Pyrrocoma hirta var. lanulosa M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  RSA715949  Pyrrocoma lucida L. P. Janeway 2005-7-31 8512 Lassen Northern High Sierra Nevada. Diamond Mountains; Head of large flat dry meadow at head of Bird Creek; 0.8 km northeast of Meadow View Peak. 1960 Comment
  CAS-BOT-BC105245  Quercus kelloggii John Thomas Howell 1973-7-10 49788 Lassen 3 miles W of Susanville 1371 Comment
  CHSC91189  Quercus kelloggii Lowell Ahart; John Dittes 2005-6-2 11942 Lassen Along a small stream, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1601 Comment
  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
  CAS-BOT-BC104478  Quercus vacciniifolia Brighton C. Cain 1925-8-24 95 Lassen Mt Lassen Volcanic National Park 1 mi below Drakesbad 1645 Comment
  JEPS107311  Ranunculus aquatilis var. aquatilis Lowell Ahart, John Dittes 2005-6-1 11904 Lassen Bottom of a depression, 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
  CHSC6245  Ranunculus aquatilis var. capillaceus R. Gein 1946-6-17 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  NY652209  Ranunculus aquatilis var. capillaceus G. Schoolcraft 1996-9-11 2561 Lassen Willow Creek near Belfast 1432.6 Comment
  CHSC4806  Ranunculus aquatilis var. subrigidus R. Carter 1967-7-13 589 Lassen In Willow Creek, ca. 5 mi E of Eagle Lake Biology Station at point where Rd. comes nearest to Willow Creek. 1560 Comment
  CHSC6246  Ranunculus canus W. Vinyard 1946-6-13 Lassen Pine Creek, Eagle Lake. 60 Comment
  JEPS55056  Ranunculus cymbalaria var. saximontanus W. L. Jepson 1918-8-2 7768 Lassen Beckwith Pass; below spring 1463 Comment
  RSA152629  Ranunculus cymbalaria var. saximontanus I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16345 Lassen N of road 13.5 miles E of Susanville Comment
  HSC69071  Ranunculus glaberrimus Gary Schoolcraft 1979-4-3 4 Lassen N of Skedaddle Ranch along main rd. 1555 Comment
  CHSC14062  Ranunculus glaberrimus var. ellipticus Tim Manolis 1974-2-16 16 Lassen 2 1/4 mi e of Eagle Lake Field Station. Comment
  NY494893  Ranunculus sceleratus N. H. Holmgren 1978-6-11 8916 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  UC1587083  Ranunculus sceleratus G. Schoolcraft 1991-6-27 2174 Lassen 3 mi e Susanville (n of Johnstonville Rd, along ditch) 1280 Comment
  JEPS94133  Ranunculus testiculatus Vernon H. Oswald and Lowell Ahart 1988-5-22 9101 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd., 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  CDA3492  Ranunculus testiculatus T. C. Fuller 1969-5-22 18480 Lassen County fairgrounds, Susanville. 0 Comment
  JEPS28453  Ranunculus uncinatus George W. Gillett 1957-7-28 926 Lassen on trail to Widow Lake 100 yd above junction with Snag Lake Trail; Lassen Volcanic National Park, Butte Lake 1859 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
  CDA7608  Ratibida columnaris N. Santamaria 1969-7-21 721 Lassen On the west side of Eagle Lake, two miles north of the Eagle Lake Resort on service road #33N01. 0 Comment
  UC870780  Rhamnus californica C. L. Hitchcock 1940-5-26 6619 Lassen ca 12 mi n Fall River Mills; Fall River 1371 Comment
  JEPS127178  Rhaponticum repens Lowell Ahart, John Dittes 2016-7-15 21229 Lassen In Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UC1587100  Rhaponticum repens G. Schoolcraft 1991-7-31 2203 Lassen just n of Hall Spring; Shinn Mts. 1706 Comment
  PASA2371  Rhus ovata M. Stason 1931-3-21 Lassen Near Roscoe Comment
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Dec 17 2014
  RSA0115086  Ribes aureum var. aureum Lowell A. Ahart, John Dittes 2008-6-20 14950 Lassen About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  NY455007  Ribes cereum B. M. Bartholomew 1988-7-22 4503 Lassen Mosquito Creek, ca. 2 km. southwest of Patterson Meadow, southern end of the Warner Mountain 2080 Comment
  SEINET10482925  Ribes cereum Mary Susan Taylor 1974-5-4 Taylor 219 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
  CHSC68749  Ribes cereum var. cereum Vernon H. Oswald; Lowell Ahart 1997-5-27 8515 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy. 139. 1682 Comment
  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
  RSA0026922  Ribes roezlii Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 6 miles below Eagle Lake. 1524 Comment
  JEPS49259  Ribes velutinum Jos. Grinnell 1928-6-18 Lassen n end Eagle Lake 1584 Comment
  HSC82187  Rigiopappus leptocladus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6036 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  JEPS88202  Rigiopappus leptocladus Vernon H. Oswald and Lowell Ahart 1996-6-17 7795 Lassen s side of Bizz Johnson Trail just e Devils Corral Trailhead (trailhead located off Hwy 36 ca. 7 mi w of Susanville); Modoc Plateau 1420 Comment
  UC1951063  Rigiopappus leptocladus Debra Valov 2007-5-22 2007077 Lassen Bieber, ca. 12 km east of Hwy 299 via County Rd A2. 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
  CHSC113059  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2013-7-22 18855 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  SEINET10448589  Rorippa obtusa Mary Susan Taylor 1974-7-8 Taylor 264 Lassen Ca. 1 mi N of Honey Lake, ca. 1 mi S of Standish, Honey Lake Wildlife Refuge. Comment
  UC1191531  Rorippa sinuata Verne Grant and Irving Schneider 1947-8-1 8226 Lassen irrigation ditch running s.w. into State Fish & Game nesting area on s.w. end of Section 19 Madeline Plain Comment
  CHSC13947  Rorippa sphaerocarpa M. S. Taylor 1974-7-8 265 Lassen On bank of levee, ca. 1 mi n of Honey Lake, ca. 1 mi s of Standish, Honey Lake Wildlife Refuge. Comment
  CHSC60400  Rosa woodsii subsp. ultramontana Mary Ann Showers 1992-6-13 2533 Lassen Lassen Volcanic National Park. East shore of Butte Lake, ca. .3 miles south of Butte Creek outlet. West of trail, near shoreline. 1841 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
  CAS-BOT-BC148360  Rubus leucodermis George W. Gillett 1957-7-26 914 Lassen Butte Lake - Lassen Volcanic National Park 1844 Comment
  CHSC60401  Rubus parviflorus Mary Ann Showers 1992-6-13 2556 Lassen Lassen Volcanic National Park. Southwest of Widow lake. 2072 Comment
  UC1746173  Rumex Annetta M. Carter 1945-9-30 1720 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  CHSC76101  Rumex fueginus Lowell Ahart; Vernon H. Oswald 1999-9-13 8214 Lassen On the edge of a flooded canal, just southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  CAS-BOT-BC433634  Rumex lacustris James Jokerst 1983-7-25 1891 Lassen Near Madeline Plains. 1614 Comment
  UC748316  Rumex maritimus Annie M. Alexander and Louise Kellogg 1946-8-11 5154 A Lassen nw end Eagle Lake (Sam Webb's Hunting Cabins) Comment
  UC1037331  Rumex paucifolius Leo Whitney 1934-7-3 1954 Lassen 14 mi w Eagle Lake (Bogard Ranger Station); Lassen National Forest 1737 Comment
  CHSC67689  Rumex salicifolius var. lacustris James D. Jokerst 1983-7-25 1891 Lassen Madeline Plains W of Termo. Comment
  JEPS39934  Rumex salicifolius var. lacustris W. L. Jepson 1918-8-15 7997 Lassen Grasshopper Valley 1615 Comment
  UC1101217  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-7-29 8183 Lassen e side Tule Lake Comment
  UC1745636  Rumex salicifolius var. lacustris Annetta M. Carter 1946-8-18 1776 Lassen S end of Grasshopper Valley, N of Eagle Lake. 1615 Comment
  UC6951 Image available Rumex salicifolius var. lacustris M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  UC748281  Rumex salicifolius var. triangulivalvis Annie M. Alexander and Louise Kellogg 1946-8-11 5153 Lassen nw end Grasshopper Valley Comment
  RSA0105589  Rumex triangulivalvis Lowell Ahart, John Dittes 2013-7-22 18867 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC77225  Rumex venosus G. Schoolcraft 1993-6-1 2267 Lassen Along Hwy 395 about 1.5 mi n. of turnoff to Wendel. 1280 Comment
  UCD150405  Rumex venosus William Anderson 1963-6-2 s.n. Lassen Honey Lake Refuge. Comment
  NY188399  Salix eriocephala subsp. mackenzieana R. D. Dorn 1972-6-2 1492 Lassen Willow Creek, about 15 miles SSE of Adin 1524.0 Comment
  JEPS114626  Salix exigua Lowell Ahart, John Dittes 2008-6-22 15043 Lassen On the bottom of a deep ditch, on the south side of the road levee, open meadow area, 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
  SEINET3260826  Salix exigua Marcus E. Jones 1897-6-25 Lassen Susanville. 1340 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
  JEPS107868  Salix lasiandra var. lasiandra Lowell Ahart, John Dittes 2005-6-2 11925 Lassen Long Valley, along a small ditch, along the road, near the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  JEPS88212  Salix lasiandra var. lasiandra Vernon H. Oswald and Lowell Ahart 1996-6-17 7790 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau 1402 Comment
  NY430478  Salix lasiolepis G. Schoolcraft 1998-5-22 2719 Lassen Susan River east end of Susanville 1268.0 Comment
  POM209470  Salix lemmonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 685 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  POM209558  Salix lemmonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 686 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  CDA37714  Salsola paulsenii Breckenridge/Filippini 2007-6-14 s.n. Lassen Wendell Plains. 0 Comment
  JEPS94087  Salsola tragus Vernon H. Oswald and Lowell Ahart 1998-9-8 9582 Lassen Ash Creek and Big Swamp 2.2 mi. n. Bieber (on county Rd. 91 (Bieber-Lookout Rd.)); Ash Creek and Big Swamp 1258 Comment
  UC1037333  Salsola tragus Leo Whitney 1934-9-1 1957 Lassen Fredonyer Pass Lassen Nat'l Forest, Fredonyer Pass Comment
  NY540086  Salsola tragus G. Schoolcraft 1982-9-20 917 Lassen West of Wendell 1219.2 Comment
  CHSC68752  Salvia aethiopis Vernon H. Oswald; Lowell Ahart 1997-5-27 8482 Lassen West side of Hwy. 139 at Lassen Community College just north of Susanville. 1310 Comment
  UC104453  Salvia aethiopis T. Brandegee 1892-6-30 Lassen streets of Susanville Comment
  CDA34340  Salvia aethiopis Anonymous 1987-6-18 Lassen New Pine Creek, along Hwy 395 north into Oregon. 0 Comment
  UC585164  Salvia dorrii var. dorrii E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1739 Lassen mountain above Red Rock 1432 Comment
  CAS-BOT-BC214311  Salvia dorrii var. pilosa Elmer I. Applegate 1897-6-3 860 Lassen Madeline Plains Comment
  SEINET10880384  Sambucus caerulea Andrew Townesmith 2012-9-4 Townesmith 2398 Lassen Along California route 44, at milepost 34, ca. 2 miles west of intersection with California route 36. 1671 Comment
  RSA537728  Sambucus microbotrys Barbara Ertter 1988-7-25 7873 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2256 Comment
  UCD137207  Sambucus nigra subsp. caerulea P. B. Schultz 1967-7-12 78 Lassen 14 miles southeast of Adin on State Highway 139. 1524 Comment
  UC1585882  Sambucus racemosa var. microbotrys Barbara Ertter 1988-7-25 7873 Lassen ridge of mts. ca 1.5 mi e Diamond Peak (ca 10 air mi s of Susanville); Diamond Mts. 2255 Comment
  JEPS117483  Sanguisorba annua Lowell Ahart, John Dittes 2010-7-31 17003 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
  UCD127944  Sanicula bipinnatifida W. W. Robbins 1926-4-17 534 Lassen Grass Valley. Comment
  POM83011  Sanicula graveolens Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  HSC28306  Sanicula tuberosa D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19154 Lassen 3 mi. N of Westwood Comment
  CAS-BOT-BC110335  Sarcobatus vermiculatus John Thomas Howell 1975-7-23 51414 Lassen Sierra Nevada. On Highway 395 about 5 miles southeast of Doyle. 1310 Comment
  CHSC110311  Sarcobatus vermiculatus L. P. Janeway; B. Castro 2012-7-2 10923 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake; 0.6 km west of Wendel Road, 4.8 air km southeast of Wendel. 1221 Comment
  CHSC30628  Sarcobatus vermiculatus T. M. Lane 1975-7-7 35 Lassen SE of Horse Lake Rd, on se shore of Horse Lake; 19 km nne of Susanville. 1508 Comment
  CHSC31116  Sarcobatus vermiculatus J. S. White 1980-4-14 114 Lassen Basin area. 0.1 mi n of US Hwy 395 3.5 mi e of Litchfield. 1341 Comment
  CHSC6239  Sarcodes sanguinea Sam Webb 1946-6-8 Lassen Roop Mountain, Eagle Lake. 2133 Comment
  JEPS94609  Saxifraga nidifica var. nidifica Vernon H. Oswald and Lowell Ahart 1997-5-27 8499 Lassen on Forest Route 38N04 n Susanville ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi e of Hwy 139) 1546 Comment
  UC1542944  Saxifraga nidifica var. nidifica G. Schoolcraft 1987-4-29 1685 Lassen Lonkey Hill 1432 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-BC111301  Schoenoplectus acutus var. occidentalis Malcom A. Nobs; Stanley Galen [S. Galen] Smith 1949-8-20 1487 Lassen Long Creek, 1 mile south of Doyle Comment
  UC2134  Schoenoplectus acutus var. occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3312 Lassen Honey Lake Valley Honey Lake Valley (tules of sloughs and w end of lake) Comment
  CHSC63613  Schoenoplectus subterminalis Vernon H. Oswald; Helen Ost, John Ost, M. L. Mini 1994-8-6 6446 Lassen Caribou Wilderness from the Hay Meadow trailhead N of Chester, at an un-named lake on the S edge of the trail between Hidden Lakes and Long Lake. 2103 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
  JEPS114854  Scirpus acutus var. occidentalis Lowell Ahart, John Dittes 2008-6-22 15018 Lassen On the east end of the levee, about 100 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber 1260 Comment
  SEINET10751251  Scirpus acutus var. occidentalis Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 842 Lassen Lassen National Forest, Almanor Ranger District. Little Tule Lake, 6.1 miles west county road A21 on county road 110 and Forest Service road 10. T31N R7E S35 NW 1/4. 1980 Comment
  UC1100770  Scirpus acutus var. occidentalis Herbert L. Mason, Verne Grant 1947-7-9 13298 Lassen irrigation ditch 5 mi e Bieber; e of Bieber Comment
  CHSC61594  Scirpus microcarpus Arthur G. Barrett 1915-8-18 35 Lassen Plumas National Forest. Laufman Ranger Station. 1463 Comment
  SEINET3815589 Image available Scirpus microcarpus Marcus E. Jones 1897-1 Lassen Susanville 1341 Comment
  JEPS63795  Scirpus pungens W. L. Jepson 1918-8-2 7785 Lassen 1 mi below Boni Ranch house (lower bench of Long Valley Creek); Long Valley 1371 Comment
  CDA39106  Scirpus pungens T. C. Fuller 1964-10-8 12708 Lassen Wendel Hot Springs, ca. 1 mile west of Wendel. 0 Comment
  CHSC66422  Scribneria bolanderi Vernon H. Oswald; Lowell Ahart 1996-6-17 7804 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On a flat on the N side of the trail between Devils Corral Trailhead and the 6.0 mile post. 1420 Comment
  UCD92528  Scribneria bolanderi Malcolm A. Nobs; S. Galen Smith, Herbert L. Mason 1949-5-29 759 Lassen on Great Northern Railroad, Highway 299, Nubeiber. Comment
  RSA516386  Scrophularia desertorum Barbara Ertter, Gary Schoolcraft 1987-6-16 7191 Lassen Skeedaddle Mtns on NE side of Honey Lake, talus slopes at base of rimrock on S side of Hot Springs VABM 2287 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
  CAS-BOT-BC214188  Scutellaria John Thomas Howell 1976-7-19 51978 Lassen Gold Run Creek southwest of Susanville, Sierra Nevada 1386 Comment
  RSA0003996  Scutellaria holmgreniorum Noel Holmgren, Pat Holmgren 1980-7-5 9524 Lassen Upper Smoke Creek drainage, 21.9 km. from U.S. Hwy. 395 via Rye Patch Can. Comment
  SEINET4855797  Scutellaria holmgreniorum Unknown 1980-7-5 9524 Lassen Upper Smoke Creek drainage, 21.9 km (13.6 mi) from U. S. Hwy 395 via Rye Patch Canyon, 24 km (15 mi) airline distance southeast of Ravendale. 1580 Comment
  CAS-BOT-BC214264  Scutellaria nana M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC214268  Scutellaria nana Richard Olmstead 1984-6-27 584 Lassen Rye Patch Canyon Rd., 13.2 mi E of US 395, turnoff ca 14 mi. S of Ravendale 1548 Comment
  SEINET10499152  Scutellaria nana Mary Merello 1993-6-28 Merello 750 Lassen Lassen National Forest, Poison Lake. Along Hwy. 44 just south of the Hwy. 89, Hwy. 44 intersection. Open pine-scrub and wetlands around lake. Volcanic soils. 1700 Comment
  UC25818  Scutellaria nana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC240081  Secale cereale R. E. Frenkel 1964-7-12 664 Lassen On California Hwy. 299, 1.5 miles west of Bieber 1249 Comment
  RSA483309  Secale cereale A. A. Beetle 1941-6-28 2811 Lassen 6 mi south of Ravendale, lower slopes Observation Peak Comment
  CAS-BOT-BC363324  Senecio aronicoides Alice Eastwood 1912-8-22 1819 Lassen Foot of Lassen Butte, Lassen Butte Region Comment
  CHSC60822  Senecio hydrophiloides Vernon H. Oswald; Lowell Ahart 1993-6-28 5600 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. Meadow. 1725 Comment
  OBI76980  Senecio hydrophiloides Anthony Baniaga 2011-6-21 388 Lassen Lassen Natl Forest. Southern McCoy Flat. Spalding Tract quad T33N R10E sec 32 SE of SW 1700 Comment
  UC1586592  Senecio hydrophiloides Vernon H. Oswald 1991-5-28 4628 Lassen ca 7 mi ne Bieber (s end of Elkins Ln (100 ft s of Modoc-Lassen county line)); Ash Creek Wildlife Area 1267 Comment
  UC2027206  Senecio hydrophiloides Anthony Baniaga 2011-6-21 388 Lassen Lassen National Forest. Southern McCoy Flat. Spalding Tract quandrangle Comment
  CAS-BOT-BC363752  Senecio integerrimus Clarence R. Quick 1961-6-21 61 -20 Lassen Adjacent to Road 21, Black Mountain Experimental Forest northeast of Lassen Peak 1798 Comment
  SEINET10799215  Senecio integerrimus Jeffrey Huber 1971-6-2 Huber 129 Lassen Approx. 30 mi. N of Susanville, on Calif. Hwy. 139, in basalt; Pinus-Artemisia-Juniper Assoc. 1646 Comment
  SEINET10799218  Senecio integerrimus David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17788 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  SEINET10908456  Senecio integerrimus Paul Gallian, David B. Dunn 1971-6-2 Gallian 473 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. Comment
  CHSC5218  Senecio integerrimus var. exaltatus A. Santos 1946-6-13 Lassen Pine Creek, Eagle Lake. 1600 Comment
  CHSC61620  Senecio integerrimus var. exaltatus Arthur C. Barrett 1915-7-1 2 Lassen Laufman Ranger Stat. 1463 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
  UC1776693  Senecio integerrimus var. exaltatus G. Schoolcraft 1994-7-7 2368 Lassen About 1 mile west of Boot Lake 219 Comment
  CAS-BOT-BC341186  Senecio lugens John Thomas Howell 1934-6-14 12159 Lassen Near Lost Lake, Warner Mts. 2438 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
  SEINET10788334  Setaria viridis Lowell Ahart 2010-8-31 Ahart 17139 Lassen T39N, R8E, southwest 1/4 section 35. About 1/4 of a plant, on damp good soil, moisture from irrigation, on the east side of Walters Road, 4235 feet south of Modoc County line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. Common. 1277 Comment
  CAS-BOT-BC213324  Sidalcea G. D. Hanna 1958-9-22 s.n. Lassen Road from Caribou Lake to Cone Lake Comment
  CHSC59754  Sidalcea glaucescens Mary Meyer 1980-5-15 Lassen Above Secret Creek. Comment
  HSC82190  Sidalcea glaucescens Thomas W. Nelson, Jane Nelson 1980-7-6 6039 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  UCD18967  Sidalcea oregana Raymond D. Ratliff 1965-8-6 53 Lassen Lassen National Forest, Harvey Valley Allotment (Ashurst Well). 1950 Comment
  JEPS15485  Sidalcea oregana subsp. oregana Joseph and Hilda Grinnell 1938-6-13 1099 a Lassen on a sage flat near Ravensdale; near Ravensdale 1554 Comment
  POM230480  Sidalcea oregana subsp. oregana D. D. Keck, Jens Clausen 1935-6-24 3740 Lassen 2 miles S. of Ravendale, Comment
  POM84765  Sidalcea oregana subsp. oregana Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  UC506975  Sidalcea oregana subsp. oregana George A. Fischer, Irwin H. Johnson 1933-7-12 F- 227 Lassen Lassen Forest , Patterson Flat 1737 Comment
  POM84786  Sidalcea oregana subsp. spicata Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  UC506918  Silene bernardina George A. Fischer and Irwin H. Johnson 1933-7-14 F- 257 Lassen Lassen Forest 1783 Comment
  UC1523715  Silene douglasii Gary Schoolcraft 1981-7-15 512 Lassen near top Fredonyir Peak; near top Fredonyir Peak 2346 Comment
  JEPS51005  Silene lemmonii Brown and Wieslander 1922-7-18 34 Lassen Martin Sprs Eagle Lake, Martin Sprs Comment
  CHSC65097  Silene menziesii Vernon H. Oswald; Lowell Ahart 1995-7-24 7137 Lassen High Cascade Range. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. At the NE corner of the impoundment on Pine Creek. 1905 Comment
  OBI75896  Silene menziesii Anthony Baniaga 2011-8-17 507 Lassen Lassen Natl Forset. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E SW of SW 1896 Comment
  CAS-BOT-BC389553  Silene nuda Louella Bass 1973-6-15 107 Lassen Elysian Valley 1325 Comment
  CHSC106846  Silene nuda Barbara Ertter 1988-7-25 7867 Lassen Ridge of Diamond Mts ca 1.5 mi E of Diamond Peak, ca 10 airmiles due S of Susanville. 2255 Comment
  JEPS50954  Silene nuda W. L. Jepson 1918-8-2 7758 Lassen Beckwith Pass 1463 Comment
  UC1137897  Silene nuda E. Sawyer 1935-7-8 274 Lassen 7 3/4 mi ene Loyalton; Sierraville Quad., ene of Loyalton 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
  CAS-BOT-BC75079  Sisymbrium altissimum Louella Bass 1973-5-25 46 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  CHSC116070  Sisymbrium altissimum Lowell Ahart; John Dittes 2015-7-13 20316 -A Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107467  Sisymbrium altissimum Lowell Ahart, John Dittes 2005-6-1 11850 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS107864  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
  SEINET11572879  Sisymbrium altissimum M. J. Williams 1974-7-26 74 -L-33 Lassen 2 mi. W of Hallelujah Junction, S of Hwy 70. 1494 Comment
  CAS-BOT-BC75077  Sisymbrium altissimum Mrs. H. C. Cantelow 1940-5-31 3759 Lassen 11 miles east of McArthur. Comment
  RSA719894  Sisymbrium altissimum Michael A. Vincent, K. Levings 2006-7-29 12909 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  CHSC64775  Sisymbrium orientale Vernon H. Oswald 1995-5-31 6803 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1371 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
  UC477505  Sisyrinchium bellum Geo. A. Fisher 1928-6-23 30 Lassen Halls Flat 1615 Comment
  CHSC7183  Sisyrinchium douglasii Lynn R. Thomas 1969-4-18 103 Lassen On bluff directly behind Lassen Memorial Hospital (area of old city dump), Susanville. (USGS 'Susanville') 1341 Comment
  NY820339  Solanum triflorum G. Schoolcraft 1987-9-1 1774 Lassen Along Ash Valley road in Ash Valley 1548 Comment
  POM203787  Solanum triflorum J. T. Howell 1934-6-10 11858 Lassen 3 miles N of Omira. Comment
  RSA0086585  Solanum xanti Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  CAS-BOT-BC365367  Solidago elongata L. S. Smith 1918-8-11 1022 Lassen Modoc National Forest. Camp One Comment
  UC1136808  Solidago velutina subsp. californica L. R. Short 1936-8-20 S- 376 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1859 Comment
  JEPS121251  Sonchus asper Lowell Ahart 2013-7-22 18846 Lassen W margin of duck field, about 50 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC113057  Sonchus asper subsp. asper Lowell Ahart; John Dittes 2013-7-22 18846 Lassen West margin of a duck field, about 50 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117296  Sonchus asper subsp. asper Lowell Ahart 2016-7-13 21111 Lassen 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Aidn, hills at the southern slope of Big Valley. 1289 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
  SEINET10879624  Sparganium natans Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 844 Lassen Lassen National Forest, Almanor Ranger District. 0.25 miles west of Forest Service road 10 on Forest Service road 31N24. T31N R7E S26 SW 1/4. 1981 Comment
  CAS-BOT-BC390560  Spergularia rubra John Thomas Howell; Gordon H. True 1973-8-1 50245 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CHSC93240  Sphaeromeria potentilloides var. potentilloides John Dittes; Scott Chamberlain 2004-6-28 1013 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-miles east of Plumas County line; meadow. 1445 Comment
  SEINET11170749  Sphenosciadium capitellatum C. G. Gulling 1905-1 1562 Lassen Big Meadows. Comment
  CAS-BOT-BC149625  Spiraea douglasii Parkison 1916-7-23 41 Lassen Harvey R.S. Pasture, Lassen National Forest 1676 Comment
  SEINET7707741  Spiraea douglasii C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  POM91114  Spiraea douglasii Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA31977  Spiranthes romanzoffiana A. A. Heller 1938-7-28 15297 Lassen About 2 miles east of Westwood. 1524 Comment
  CHSC41843  Stachys ajugoides var. rigida P. V. Caldwell 1972-7-8 262 Lassen Eagle Lake. 1 mile from the forest road toward Papoose Meadows on Papoose Creek. Comment
  CHSC5276  Stachys ajugoides var. rigida L. Harman 1946-6-26 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CHSC68859  Stellaria crispa Vernon Oswald; Lowell Ahart 1997-6-24 8610 Lassen South of Susanville on the north side of Diamond Mtn. at a slope along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. 1889 Comment
  CHSC4785  Stellaria longipes var. longipes R. Carter 1967-6-29 574 Lassen In Murrer's Meadow, 100 yds. SE of dam. Comment
  JEPS51139  Stellaria longipes var. longipes Brown and Wieslander 1922-7-18 52 Lassen Martin Springs; Eagle Lake Comment
  CHSC68848  Stenotus acaulis Vernon Oswald; Lowell Ahart 1997-6-24 8630 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
  UC86569  Stenotus acaulis T. S. Brandegee 1892-7-2 Lassen Near Susanville 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
  CAS-BOT-BC375448  Stephanomeria exigua subsp. exigua Margaret Williams; Steven Williams 1974-7-26 74 - L - 20 Lassen Area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  JEPS36876  Stephanomeria lactucina Brown and Wieslander 1922-7-19 40 Lassen Martin Springs Eagle Lake Comment
  CAS-BOT-BC375596  Stephanomeria lactucina Alice Eastwood 1912-8-22 s.n. Lassen Trail from Morgans Springs to Lassen Butte Region Comment
  POM147898  Stephanomeria lactucina J. B. Feudge 1927-7-20 1781 Lassen Westwood. Comment
  CAS-BOT-BC322911  Stephanomeria tenuifolia Clare B. Hardham 1969-8-28 17429 Lassen West of Janesville, Sierra Nevada Comment
  CHSC23504  Stephanomeria tenuifolia Wayne O. Baum 1971-7-19 71 -76 Lassen E. slope of Gallatin Peak. 2072 Comment
  UC1523732  Stephanomeria tenuifolia Gary Schoolcraft 1981-7-7 513 Lassen nw of Susanville Peak 2011 Comment
  HSC26013  Stipa hymenoides D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19297 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  UCR17287  Stipa thurberiana Frank C. Vasek 1975-7-11 750711- 37 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  SEINET10966883  Stipa thurberiana Paul Gallian, David B. Dunn 1971-6-2 Gallian 513 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
  CHSC57125  Streptanthus Mary Meyer 1980-7-21 Lassen Near sharp bend in road on way to Fire Lookout. 2316 Comment
  CAS-BOT-BC61289  Streptanthus cordatus var. cordatus Alice Eastwood; John Thomas Howell 1940-6-15 8309 Lassen Willow Creek near Hayden Hill. Comment
  UC1184065  Streptanthus tortuosus var. orbiculatus Jean Langenheim 1957-6-26 4381 Lassen from area adjacent to 1937 chaparral quadrat (ne part of Lassen Co.); Northwest Said Valley Comment
  UC7241  Suaeda calceoliformis J. Burtt Davy June 17-24 1897 3350 Lassen Honey Lake Valley Comment
  SEINET4172103  Suaeda occidentalis T. L. Breene, H. Sampson 1937-8-28 59 Lassen 5 mi. S of Wendel Comment
  CHSC105255  Swertia albicaulis var. albicaulis Lowell Ahart; John Dittes 2010-7-31 16987 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
  JEPS47014  Swertia albicaulis var. albicaulis Jos. Grinnell Lassen Eagle Lake 1584 Comment
  CHSC60349  Symphoricarpos rotundifolius var. rotundifolius Mary Ann Showers 1992-6-13 2532 Lassen Lassen Volcanic National Park. East shore of Butte Lake, ca 0.3 miles south