Search Results — 2000 specimen records retrieved (1635 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC6219  Abies magnifica P. Balch 1955-6-1 Lassen Silver Lake. 1981 Comment
  POM85381  Acer glabrum var. torreyi Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain, Susanville, Perkins Ranch 1829 Comment
  SEINET10473515  Achillea lanulosa Mary Susan Taylor 1974-1 Taylor 286 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC28648  Achillea millefolium Louella Bass 1973-5-29 72 Lassen Elysian Valley 1325 Comment
  HSC4553  Achillea millefolium M. T. Milligan 1964-7-16 136 Lassen 2 mi. N on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  UC1136759  Achillea millefolium L. R. Short and Wm. Gansberg 1936-7-9 S 483 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1804 Comment
  CAS-BOT-BC260400  Achnatherum hymenoides Margaret Williams; Steven Williams 1974-7-26 74 -L-1 Lassen Burned area near Hallelujah Junction, W of Highway 395 and S of Highway 70 1493 Comment
  CHSC52909  Achnatherum hymenoides L. P. Janeway 1990-7-4 3769 Lassen Near the east-side of saddle ca 0.8 mi NE of Meadowview Peak. 1981 Comment
  CHSC93660  Achnatherum hymenoides Lowell Ahart; John Dittes 2005-6-2 11996 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
  UC1609124  Achnatherum hymenoides Vernon H. Oswald and Lowell Ahart 1993-6-14 5544 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89)); Eagle Lake 1566 Comment
  UC40031  Achnatherum lemmonii M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixey Mts. Comment
  UCD50617  Achnatherum lemmonii Beecher Crampton 1960-6-18 5717 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch. 1981 Comment
  UCD50680  Achnatherum lemmonii Beecher Crampton 1964-6-26 7079 Lassen ca. 35 miles n.w. Susanville, south slope Ashurst Mtn. near Stanford Spring. 1981 Comment
  CAS-BOT-BC110708  Achnatherum nevadense G. Schoolcraft 1997-6-26 2600 Lassen Large knob between Milford and Janesville. 1676 Comment
  SEINET249960 Image available Achnatherum nevadense Beecher Crampton 1954-7-5 2064 Lassen 4.5 miles west of Susanville, along state highway 36. 1433 Comment
  UCD37479  Achnatherum nevadense Beecher Crampton 1960-6-18 5729 Lassen Lassen County, southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 Comment
  CAS-BOT-BC216801  Achnatherum occidentale David D. Keck 1944-7-8 5451 Lassen 1.5 miles W of Susanville on rim of plateau overlooking Susan River Canyon 1341 Comment
  SEINET7593424 Image available Achnatherum occidentale John Thomas Howell 1934-1 12431 Lassen Hall's Flat Comment
  UC1024835  Achnatherum occidentale subsp. californicum Leo Whitney 1935-6-10 3221 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UCD51136  Achnatherum occidentale subsp. californicum L. Whitney 1935-6-18 3262 b Lassen Logan Mountain, 13 miles north of Lassen Peak, Lassen National Forest. 1981 Comment
  CAS-BOT-BC218616  Achnatherum occidentale subsp. pubescens Margaret Williams; Steven Williams 1974-7-26 74 -L-37 Lassen Burned area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70, Sierra Nevada 1493 Comment
  UC1137654  Achnatherum occidentale subsp. pubescens George A. Fischer and Irwin H. Johnson 1933-7-12 218 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen National Forest 1722 Comment
  UC1143048  Achnatherum occidentale subsp. pubescens L. R. Short and J. Warren 1936-6-29 S- 462 Lassen Burgess Spring Experimental Range Lassen National Forest 1820 Comment
  UC1153871  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2066 Lassen 5.5 mi w, along State Hwy. 36 Susanville (volcanic rubble under pine) 1447 Comment
  CHSC80710  Achnatherum speciosum V. H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10034 Lassen Northeast of Doyle in the Fort Sage Mtns, trailhead to top of mountain from the end of a 4WD road. 1798 Comment
  CAS-BOT-BC218008  Achnatherum thurberianum John Thomas Howell 1976-7-20 52005 Lassen About 5 miles W of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  UCD51425  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  CAS-BOT-BC217991  Achnatherum webberi David D. Keck; J. Clausen 1935-6-24 3749 Lassen 2 miles S of Ravendale 1463 Comment
  UC769950  Achnatherum webberi R. F. Hoover 1940-9-29 4647 Lassen pass between Shaffer Mt. and Warren Peak Comment
  UCD51301  Achnatherum webberi Beecher Crampton 1954-7-6 2074 Lassen Along US Hwy 395, 15 miles south of Ravendale. 1676 Comment
  CHSC117295  Acmispon americanus var. americanus Lowell Ahart; John Dittes 2016-7-13 21119 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber , 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  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
  CAS-BOT-BC412874  Aconogonon davisiae G. Schoolcraft 1997-8-6 2664 Lassen N of Dimond [Diamond] Rock Peak 2316 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen 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
  CHSC5269  Agastache parvifolia J. B. Kimsey 1946-6-10 Lassen 1615 Comment
  CHSC65107  Agastache parvifolia Vernon H. Oswald 1995-7-24 7132 Lassen N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just S of Pine Creek. 1950 Comment
  UC1483811  Agastache urticifolia G. Schoolcraft 1979-7-5 122 Lassen n face Observatioin Peak; n face of Observation Peak 1828 Comment
  JEPS85819  Ageratina occidentalis Roy E. Buck 1989-10-5 1420 Lassen ca 1.8 air km sw Fredonyer Peak summit (28 air km n of Susanville, along road to Fredonyer Peak, on upper wnw-facing slope of ridge overlooking n end of Eagle Lake); Eagle Lake 2115 Comment
  UC29341  Agoseris X dasycarpa M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Dixey Valley Comment
  UC29344  Agoseris X dasycarpa M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Dixey Valley Comment
  CHSC7649  Agoseris aurantiaca Beverly J. Wise 1969-5-18 10 Lassen Alongside Susan River. 1615 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
  RSA0009531  Agoseris grandiflora Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  JEPS88214  Agoseris heterophylla Vernon H. Oswald and Lowell Ahart 1996-6-24 7860 Lassen ca. 0.5 mi e Eagle Lake Rd. (A1) (and 2.5 mi s of Eagle Lake, w side of meadow ca. 0.4 mi s of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  JEPS94999  Agoseris heterophylla Vernon Oswald and Lowell Ahart 1997-6-24 8601 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
  OBI77284  Agoseris heterophylla Anthony Baniaga 2011-6-17 354 Lassen Lassen NF. N side of Hog Flat Reservoir. Pegleg Mtn quad T30N R10E sec 19 NE of NE 1678 Comment
  SEINET6738695 Image available Agoseris heterophylla M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-12 80- 19 -1 Lassen Smoke Creek Rd., 0.1 mile E of Hwy 395 1372 Comment
  UCD107495  Agoseris monticola Tim Kuhn 2006-7-18 41 Lassen Eagle Lake Ranger District.. Comment
  UC585114  Agoseris parviflora E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1793 Lassen about 2 mi n Madeline 1363 Comment
  CAS-BOT-BC110735  Agropyron James Jokerst 1983-7-25 1894 Lassen Near Madelin Plains. 1614 Comment
  SEINET10551977  Agropyron elongatum John Thomas Howell 1975-7-23 Howell 51409 Lassen Along Hwy 395 between Johnstonville and Janesville. Densely cespitose. 1280 Comment
  SEINET7297772 Image available Agrositanion John Thomas Howell 1976-1 52002 Lassen Open juniper-Jeffrey pine woodland on basaltic rock, about 5 miles west of Fredonyer Pass near confluecne of Susan River and Willard Creek. 1433 Comment
  SEINET12950845  Agrositanion saundersii B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11518 Lassen Smith Flat on Cedar Creek, 6 or 7 miles E of Madeline, N of County Road 510; Blue Door Flat.; 41.08261 -120.34968 1692 Comment
  CAS-BOT-BC127238  Agrostis exarata Malcom A. Nobs; S. Galen Smith 1949-7-21 1057 Lassen 4 miles north of Madeline. Comment
  UC1037106  Agrostis exarata Leo Whitney 1934-9-1 3000 Lassen Fredonyer Campground Lassen National Forest 1706 Comment
  UC773966  Agrostis exarata L. R. Short 1936-8-21 S- 499 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1798 Comment
  CAS-BOT-BC139675  Agrostis gigantea John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49484 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  CAS-BOT-BC139678  Agrostis gigantea John Thomas Howell 1975-7-23 51401 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC139680  Agrostis gigantea Clare B. Hardham 1969-8-28 17427 Lassen Sierra Nevada. West of Janesville. Comment
  UCD51747  Agrostis gigantea John Thomas Howell 1975-7-23 51401 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC139296  Agrostis idahoensis Arnold Tiehm 1980-5-29 5760 Lassen Amedee Hot Springs, north end of Honey Lake Valley, 4 air miles southeast of Wendel. 1220 Comment
  RSA299277  Agrostis idahoensis J. T. Howell, Gordon H. True 1973-8-1 50232 Lassen Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville 2134 Comment
  CHSC58860  Agrostis pallens Vernon H. Oswald; Lowell Ahart 1992-7-16 5107 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. 1745 Comment
  UCD53120  Agrostis pallens Leo Whitney 1934-7-10 2225 Lassen near Harvey Spring, Harvey Valley, 14 miles west of Eagle Lake, Lassen National Forest. 1737 Comment
  UCD53299  Agrostis scabra L. Whitney 1933-8-15 s.n. Lassen Meadow near Sheepshead. Comment
  CAS-BOT-BC138622  Agrostis stolonifera H. S. Yates 1936-8-11 6069 Lassen Baxter Creek. 1280 Comment
  CAS-BOT-BC138625  Agrostis stolonifera John Thomas Howell 1973-7-10 s.n. Lassen Sierra Nevada. In city park, Susanville. 1295 Comment
  CHSC115828  Agrostis stolonifera Lowell Ahart; John Dittes 2015-7-14 20335 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  UCSC000092  Agrostis stolonifera August L. Hormay 1932-7-20 s.n. Lassen Bogard Ranger Station - Lassen National Forest Comment
  POM75113  Aliciella lottiae Marcus E. Jones 1897-6-24 9872 Lassen 10 to 15 miles west from Amedee. 1220 Comment
  SEINET14163171  Aliciella triodon A. Tiehm 1980-1 5756 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  CAS-BOT-BC267065  Alisma gramineum Malcom A. Nobs; S. Galen Smith 1949-7-22 1074 Lassen Marshes along Willow Creek, Willow Creek Valley, 10 miles N of Susanville Comment
  UCD137906  Alisma gramineum Malcolm A. Nobs; S. Galen Smith 1949-7-22 1074 Lassen along Willow Creek, Willow Creek Valley, 10 miles north of Susanville. Comment
  CHSC7661  Allium acuminatum Beverley J. Wise 1969-5-18 138 Lassen 17.0 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. 1524 Comment
  GMDRC7739  Allium acuminatum J. M. Andre, G. Clifton 1993-6-1 33419 Lassen Modoc Plateau: along US Hwy 395 approx 11 mi. SE of Ravendale, just north of Tule Patch Spring, east of Snowstorm Mtn 1588 Comment
  POM110306  Allium acuminatum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  UC843269  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen e Fredonyer Pass (on Highway #36) 1645 Comment
  UCD150395  Allium acuminatum Harry A. George 1967-6-14 s.n. Lassen Hartson Reservoir. Comment
  UC3055  Allium anceps Mrs. C. C. Bruce June, 1898 Lassen Madeline Plains Comment
  JEPS87459  Allium lemmonii Vernon H. Oswald and Lowell Ahart 1993-6-28 5587 Lassen e. of Poison Lake (Harvey Valley Rd. (33N02), 1.2 mi n. of Hwy. 44, e side of Grays Valley); Grays Valley 1731 Comment
  SEINET188333  Allium lemmonii C. L. Hitchcock 1946-5-26 6640 Lassen Overflow of Pitt River 1 mi W of Bieber Comment
  CAS-BOT-BC474045  Allium parvum Doris Kildale Gillespie 1930-5-13 9371 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC474048  Allium parvum Ethel S. Willits 1940-4-28 199 Lassen South of Surprise Valley, Modoc County 1371 Comment
  UCD138589  Allium parvum Geo. C. Wood 1940-4-25 s.n. Lassen Coffin Ranch near Susanville. Comment
  CAS-BOT-BC474075  Allium platycaule Clare B. Hardham 1971-7-22 s.n. Lassen Diamond Moutain 2346 Comment
  CAS-BOT-BC476625  Allium tolmiei B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6563 Lassen U.S. Hwy. 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield. 1330 Comment
  CAS-BOT-BC171315  Alnus incana subsp. tenuifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49461 Lassen Elysian Valley, W of Janesville. Sierra Nevada 1325 Comment
  CHSC26169  Alnus incana subsp. tenuifolia Detzer; Sacks 1977-7-24 2 Lassen Ca. 3 mi se Milford, .5 mi se Laufman Ranger Stn., on unimproved USFS road. 1481 Comment
  CHSC91199  Alnus incana subsp. tenuifolia Lowell Ahart; John Dittes 2005-6-2 11945 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
  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
  CHSC66280  Alopecurus aequalis Vernon H. Oswald; Lowell Ahart 1996-6-24 7873 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. 1633 Comment
  RSA264236  Alopecurus aequalis A. A. Beetle 1948-6-28 2795 Lassen 10 miles west of Chester, rte. 36 Comment
  SEINET7295647 Image available Alopecurus aequalis A. A. Beetle 1941-1 2795 Lassen 10 miles west of Chester, rte 36 Comment
  UC1594602  Alopecurus aequalis Vernon H. Oswald and Lowell Ahart 1992-7-16 5108 Lassen s. side Hwy. 44 between Old Station and Susanville (Bridge Creek entering McCoy Flat Reservoir) 1691 Comment
  UCD55848  Alopecurus aequalis L. Whitney 1933-8-4 s.n. Lassen 8 mi n.w. Slake Creek, Eagle Lake, Lassen National Forest. 1889 Comment
  CHSC110894  Alopecurus carolinianus Lowell Ahart; John Dittes 2012-7-9 18289 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
  JEPS118454  Alopecurus geniculatus Lowell Ahart, John Dittes 2011-6-20 17504 Lassen In the small stream, about 80 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
  RSA125344  Alopecurus geniculatus P. H. Raven, Otto T. Solbrig 1958-6-17 13299 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline. Comment
  UCD55918  Alopecurus saccatus P. B. Kennedy 1927-6-13 s.n. Lassen Pit River. Comment
  SEINET5340073  Alyssum desertorum J. A. Young 1982-1 s.n. Lassen M. Meyer's Ranch, Adin. 1372 Comment
  UC1924261  Alyssum minus subsp. micranthum Debra Valov 2004-5-31 2004226 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CDA42845  Alyssum minus var. micranthum L. Ahart, John Dittes 2011-6-2 17493 Lassen About 20 yards east of the stream, about 80 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. Comment
  JEPS40951  Ambrosia acanthicarpa R. F. Hoover 1940-10-5 4666 Lassen Wendel Comment
  UC761997  Ambrosia acanthicarpa R. F. Hoover 1940-10-5 4666 Lassen Wendel Comment
  CAS-BOT-BC42889  Ambrosia acanthicarpa P. Monnet 1913-8-1 966 Lassen unspecified Comment
  RSA132023  Ambrosia acanthicarpa Delzie Demaree 1959-8-18 41520 Lassen P.O. Termo. Comment
  CAS-BOT-BC142908  Amelanchier A. A. Heller 1938-6-4 15144 Lassen On the bank of a small stream in the pine forest a mile east of Fredonyer Pass on Highway #36. 1706 Comment
  CHSC25302  Amelanchier pallida Pauleen Broyles 1977-5-30 147 Lassen Spencer Spring ca 8 km nne of Herlong. Canyon below spring. 1620 Comment
  JEPS28676  Amelanchier utahensis George W. Gillett 1957-7-26 903 Lassen Butte Lake Lassen Volcanic National Park (point of rocks w of outlet and above trail) 1844 Comment
  SD43502  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  UC506908  Amelanchier utahensis George A. Fischer and Irwin H. Johnson 1933-7-14 F 270 Lassen Lassen Forest 1737 Comment
  CHSC99503  Amsinckia intermedia Lowell Ahart; John Dittes 2008-6-20 14935 Lassen On the levee road, about 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS114629  Amsinckia menziesii var. menziesii Lowell Ahart, John Dittes 2008-6-22 15042 Lassen On the east side 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
  CHSC64764  Amsinckia tessellata var. tessellata Vernon H. Oswald 1995-5-24 6761 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. 1280 Comment
  JEPS94122  Amsinckia tessellata var. tessellata Vernon H. Oswald and Lowell Ahart 1998-5-22 9091 Lassen Hwy. 395 at an intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 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
  SEINET6734941 Image available Anaphalis margaritacea C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  CAS-BOT-BC15606  Ancistrocarphus filagineus Alice Eastwood; J. T. Howell 1940-6-16 8354 Lassen Constantia Comment
  POM36284  Ancistrocarphus filagineus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  JEPS28683  Angelica breweri George W. Gillett 1957-7-26 910 Lassen Lassen Volcanic National Park, e shore of Butte Lake Butte Lake; Lassen Volcanic National Park, Butte Lake 1859 Comment
  CHSC71067  Anisocoma acaulis Vernon H. Oswald; Lowell Ahart 1998-5-22 9121 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. 1463 Comment
  SEINET6735001 Image available Anisocoma acaulis F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  CHSC23527  Antennaria argentea Wayne O. Baum 1971-7-12 71 -54 Lassen E. slope of Gallatin Peak. 1950 Comment
  JEPS88514  Antennaria argentea Vernon H. Oswald and Lowell Ahart 1996-6-24 7837 Lassen Forest Rd. 31N63 ca. 0.2 mi s spur road to the cabins at Papoose Meadow (ca. 0.5 mi e of Eagle Lake Rd. (A1) and 2.5 mi s of Eagle Lake); Modoc Plateau 1644 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
  CAS-BOT-BC58689  Antennaria argentea subsp. aberrans Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CHSC68729  Antennaria dimorpha Vernon H. Oswald; Lowell Ahart 1997-5-27 8505 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.3 mi east of Hwy. 139. 1560 Comment
  HSC68156  Antennaria dimorpha J. P. Smith, J. O. Sawyer 1971-5-23 4657 Lassen Along Hwy. 139, 23 miles south of junction with road to Thermo. Comment
  UC1137285  Antennaria dimorpha K. E. Bradshaw 1939-5-27 244 Lassen near s end of Black Mt. Experimental Forest; Lassen National Forest, Halls Flat Quad., Thompson Meadow 1737 Comment
  CAS-BOT-BC69135  Antennaria geyeri Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CAS-BOT-BC69143  Antennaria geyeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49517 Lassen Elysian Valley, west of Janesville 1325 Comment
  JEPS117487  Antennaria geyeri Lowell Ahart, John Dittes 2010-7-31 16974 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
  CAS-BOT-BC58692  Antennaria luzuloides A. A. Heller 1938-6-23 15189 Lassen East of Westwood Comment
  UC1137667  Antennaria luzuloides L. R. Short and J. Warren 1936-6-23 S- 452 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1741 Comment
  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-BC58695  Antennaria luzuloides Doris Kildale Gillespie 1930-5-12 9317 Lassen Fredonia Pass near Susanville Comment
  CHSC54171  Antennaria luzuloides subsp. luzuloides Vernon H. Oswald 1991-5-28 4625 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  UC1037270  Antennaria rosea Leo Whitney 1934-7-10 1768 Lassen near, 14 mi w of Eagle Lake Harvey Spring; Lassen National Forest, Harvey Valley 1737 Comment
  UC1609112  Antennaria rosea Vernon H. Oswald and Lowell Ahart 1993-6-14 5506 Lassen Lassen A21 (32N02) 2.1 mi e Lassen 105 (32N28Y) (se side of valley, ca 8 air mi w of Eagle Lake); Pine Creek Valley 1728 Comment
  JEPS114859  Apera interrupta Lowell Ahart, John Dittes 2008-6-19 14868 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
  CHSC4823  Apocynum androsaemifolium R. Carter 1967-7-21 624 Lassen Ca. 3 mi n of highway 395 on rd through Jonesville on e side of rd. Dramond Mountains. Comment
  UC1137727  Apocynum androsaemifolium L. R. Short and D. Gish 1936-8-5 S- 492 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1783 Comment
  UC773901  Apocynum androsaemifolium L. R. Short and D. Gish 1936-8-5 S- 492 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1783 Comment
  CAS-BOT-BC392013  Aquilegia Clare B. Hardham 1969-8-28 17453 I Lassen Slope west of Janesville Comment
  CHSC67063  Aquilegia formosa Willis Ball 1969-6-25 37 Lassen Found in Upper Murrer's Mdw. 1584 Comment
  CHSC12479  Aquilegia formosa var. truncata Carol Weld 1969-6-25 25 Lassen Murrer's Meadow. 1524 Comment
  UC773931  Arabis L. R. Short 1936-6-1 S- 354 Lassen Burgess Spring Experiment Range Lassen Forest 1859 Comment
  UCR18735  Arabis holboellii Frank C. Vasek 1975-7-11 750711- 13 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  UC10185  Arabis holboellii var. retrofracta M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  NY119620  Arabis sparsiflora var. subvillosa R. C. Rollins 1981-5-31 81178 Lassen Just north of Eagle Lake 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
  UC1037287  Arceuthobium campylopodum Leo Whitney 1934-7-15 1703 Lassen ca 15 mi w Eagle Lake; Lassen National Forest, Crater Mtn Comment
  CAS-BOT-BC45903  Arctostaphylos nevadensis Mrs. E. C. Sutliffe 1927-6-1 s.n Lassen Drakesbad, Lassen Volcanic Park Comment
  CHSC21058  Arctostaphylos nevadensis M. S. Taylor 1975-7-16 838 Lassen On trail between Echo Lake and Summit Lake, Lassen National Park. Comment
  NY223210  Arctostaphylos patula P. A. Munz 1947-5-18 11865 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville. 1508.8 Comment
  SD43498  Arctostaphylos patula Philip A. Munz 1947-5-18 11865 Lassen Fredoyner Forestry Public Campground, W of Susanville 1509 Comment
  CHSC36979  Arenaria aculeata M. S. Taylor; B. Hammond 1982-8-27 5056 A Lassen On ridge between Crystal and Adams Peaks, Diamond Mts, ca. 4 air mi sw of Constantia. 2225 Comment
  SEINET10537551  Arenaria aculeata Mary Susan Taylor 1982-8-27 Taylor 5056 A Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  RSA0002312  Arenaria congesta var. simulans A. A. Heller 1938-6-23 15198 Lassen On an open slope east of Fredonyer Pass. 1646 Comment
  JEPS94458  Arenaria congesta var. subcongesta Vernon Oswald and Lowell Ahart 1997-6-24 8632 Lassen s of Susanville (near the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC1562793  Arenaria congesta var. subcongesta Barbara Ertter with Gary Schoolcraft 1987-6-16 7193 Lassen ne side Honey lake (saddle on E side of Hot Springs Peak.); Skeedaddle Mountains Comment
  UC726207  Arenaria congesta var. subcongesta A. A. Heller 1938-6-23 15198 Lassen e Fredonyer Pass 1645 Comment
  UCR244034  Arenaria congesta var. suffrutescens Jim Andre, G. L. Clifton 1993-6-3 19704 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley near Laufman Ranger Station, c. 4 mi. SSE of Milford (at U.S. 395), c. 30 mi. south of Susanville, just inside Plumas NF boundary 1477 Comment
  CHSC68857  Arenaria kingii var. glabrescens Vernon Oswald; Lowell Ahart 1997-6-24 8633 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  CAS-BOT-BC401656  Argemone munita subsp. munita Margaret Williams; Steven Williams 1974-7-26 74 -L-11 Lassen Area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CDA24523  Argemone munita subsp. rotundata T. C. Fuller 1962-8-28 9476 Lassen Road to Standish, 3 miles west of Wendell, north of Honey Lake. 0 Comment
  RSA11786  Argemone munita subsp. rotundata Elmer I. Applegate 1921-9-4 3345 Lassen Hills north of Susanville Comment
  RSA647527  Argemone munita subsp. rotundata Marion P. Harthill 1972-6-16 789 Lassen Doyle. Comment
  UC1037334  Argemone rotundata Leo Whitney 1934-8-5 1959 Lassen 10 mi se of Susanville (Harvey Lake Valley); Harvey Lake Valley 1402 Comment
  UC1191450  Argemone rotundata Verne Grant, Irving Schneider 1947-9-5 8367 Lassen nw shore of Eagle Lake, by Sam Webb's place (Spaulding) Eagle Lake Comment
  CHSC5195  Arnica chamissonis J. Wolf 1946-6-20 Lassen Grasshopper Valley. 1624 Comment
  JEPS17745  Arnica chamissonis Rimo Bacigalupi with G. T. Robbins 1955-7-20 5414 Lassen Mosquito Creek (along), in Corporation Meadow, s end of Warner Mts. Modoc National Forest, Warner Mts., Corporation Meadow, Mosq 2042 Comment
  JEPS19757  Arnica chamissonis Rimo Bacigalupi with S. Galen Smith 1957-6-28 6005 Lassen 6.1 mi s of Madeline Comment
  SEINET6755557 Image available Arnica chamissonis B. L. Wilson, D. Lytjen, N. Otting 2005-7-26 11450 Lassen Northeast part of Round Corral Reservoir, north of Buckhorn Road about a mile and a half west of Pyramid Lake 1876 Comment
  UC1776710  Arnica chamissonis G. Schoolcraft 1997-8-1 2385 Lassen About 2 miles W of Boot Lake 2255 Comment
  UC29631  Arnica chamissonis M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  CHSC11767  Arnica cordifolia Wayne O. Baum 1971-6-21 71 -5 Lassen E. slope of Gallatin Peak. 1920 Comment
  JEPS22841  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mi e Fredonyer Pass 1706 Comment
  POM253188  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mile east of Fredonyer Pass on hwy 36 1707 Comment
  UC1776719  Arnica parryi G. Schoolcraft 1997-8-1 2386 Lassen About 2 miles W of Boot Lake 2255 Comment
  CAS-BOT-BC85029  Arnica sororia Elmer I. Applegate 1897-6-3 866 Lassen Madeline Plains Comment
  JEPS109852  Arnica sororia Dean W. Taylor 2006-6-29 19559 Lassen Longs Cabin (ca. 12 air miles NE of Old Station) 1783 Comment
  RSA702450  Arnica sororia L. P. Janeway 2004-6-26 8166 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  JEPS103219  Arnica sororia G. Schoolcraft 1993-6-19 2298 Lassen Ash Valley RNA between Adin and Madeline, CA. 1600 Comment
  CHSC118471  Artemisia arbuscula subsp. thermopola Don Leply 2016-7-31 Lassen Between Feather Lakes and Highway 44, approximately 5.3 air miles southeast of Bogard Rest Area; a little more than a third of a mile northeast of railroad crossing on Highway 44. 40N31:46.7 x 121W01:35.9. 1743 Comment
  SEINET222925 Image available Artemisia cana A. A. Beetle 1957-8-16 Lassen Lassen County: Between Ravendale and Termo. Comment
  UC1119576  Artemisia cana subsp. bolanderi A. Simontacchi 1940-9-16 950 Lassen 1.3 mi ne Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1507398  Artemisia cana subsp. bolanderi G. Schoolcraft 1979-9-27 194 Lassen Painter Flat 1722 Comment
  CAS-BOT-BC84828  Artemisia cana subsp. cana Ernest C. Twisselmann 1961-7-21 6572 Lassen Harvey Valley 1981 Comment
  SBBG95820  Artemisia douglasiana G. K. Helmkamp 1990-9-23 E- 15 Lassen 20 mi N of Litchfield, along US Hwy 395 1432 Comment
  UCD159571  Artemisia douglasiana D. S. Park 2011-6-27 308 Lassen East of Westwood. Growing near Willard Creek. 1471 Comment
  JEPS103170  Artemisia dracunculus Beth Corbin 2002-7-10 1089 Lassen Madeline Plains, ESE side. 5 air mi N of top of Observation Pk. 1627 Comment
  CHSC65291  Artemisia ludoviciana subsp. ludoviciana Vernon H. Oswald; Lowell Ahart 1995-8-14 7196 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittent stream, N of Susanville. 1676 Comment
  SEINET245807  Artemisia nova Arnold Tiehm, Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 road miles north of Karlo Road on highway 395 from Litchfield to Alturas, just east of the highway 1402 Comment
  CHSC7634  Artemisia rothrockii Beverley J. Wise 1969-4-13 12 Lassen 2.9 mi east of the junction of Hwy 395 on Las. Co. Rd.338. 1463 Comment
  CHSC42148  Artemisia tridentata C. E. Laver 1985-8-12 Lassen Ca. 8.5 mi SE of Madeline and 9 mi NE of Termo. 2194 Comment
  CAS-BOT-BC97326  Artemisia tridentata subsp. tridentata Clare B. Hardham 1971-8-22 18395 Lassen Diamond Mountain 2346 Comment
  CAS-BOT-BC99281  Artemisia tridentata subsp. vaseyana G. Schoolcraft 1994-9-13 2431 Lassen Just above gate along road to Fredonyer Pk. lookout. 2255 Comment
  CHSC118473  Artemisia tridentata subsp. vaseyana Don Lepley 2016-9-17 Lassen Between Feather Lakes and Highway 44, approximately 5.3 air miles southeast of Bogard Rest Area; a little more than a third of a mile north of railroad crossing on Highway 44. 40N31:46.8 x 121W01:37.1 1743 Comment
  SEINET3397741  Artemisia tridentata subsp. vaseyana Unknown 1994-1 s.n. Lassen Sage Hen Summit - US 395 Comment
  SEINET955514  Asclepias cordifolia Helen K. Sharsmith 1955-1 4514 Lassen Lassen National Forest. In forest adjacent to State Highway 299 near Fall River Mills. 1219 Comment
  UC1136827  Asclepias speciosa George A. Fisher, Irwin H. Johnson 1933-7-29 F Lassen Stringer Lassen National Forest 1694 Comment
  RSA516358  Aster campestris Barbara Ertter 1987-7-25 7311 a Lassen About 22 air miles NW of Susanville, Pine Creek Valley at jct. of Bridge Creek Springs Rd. 1738 Comment
  RSA18255  Aster foliaceus var. parryi C. B. Wolf 1929-9-1 3787 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  POM261593  Aster integrifolius Alice Eastwood 1912-8-22 1883 Lassen Morgans Springs Comment
  UCD105584  Astragalus Grady L. Webster 1989-5-13 7710 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  NY790906  Astragalus agrestis G. Schoolcraft 1986-6-25 1642 Lassen About 3 miles northwest of Termo 1615.4 Comment
  CAS-BOT-BC177421  Astragalus andersonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC77208  Astragalus andersonii G. Schoolcraft 1996-5-13 2520 Lassen Fort Sage OHV area 3 miles ne of Doyle. 1402 Comment
  NY791376  Astragalus andersonii W. W. Eggleston 1911-5-29 6734 Lassen Vicinity of Doyle Station 1290 Comment
  NY791374  Astragalus andersonii LeDoux 1973-5-24 861 Lassen Collected at jct. of Highways 70 and 395 at Arco Station. Comment
  CAS-BOT-BC27614  Astragalus anxius Robert J. Meinke; Kaye 1991-7-16 6108 Lassen Ash Valley, ca. 25 km W of Madeline, along Ash Valley Rd. 1550 Comment
  UC1594460  Astragalus anxius Meinke and Lantz 1991-7-16 6108 Lassen ca 25 km w Madeline (along Ash Valley Rd.); Ash Valley 1550 Comment
  CHSC63396  Astragalus canadensis var. brevidens Vernon H. Oswald 1994-7-8 6368 Lassen Wildlife Viewing Area along Hwy. 139 on the NE shore of Eagle Lake, 5.9 mi S of County Rd. 201 (A1). 1557 Comment
  POM204047  Astragalus canadensis var. brevidens J. T. Howell 1934-7-8 12504 Lassen Spaldings Resort; Eagle Lake Comment
  NY797389  Astragalus canadensis var. brevidens J. T. Howell 1977-8-11 52718 Lassen East of Beckwourth Pass, near Hallelujah Junction 1554.5 Comment
  UC82577  Astragalus canadensis var. brevidens unknown 1892-6-20 Lassen Milford Comment
  SFV1777  Astragalus curvicarpus I. L. Wiggins, D. B. Wiggins 1961-6-11 16331 Lassen 13.5 miles east of Susanville. 1240 Comment
  UCD33606  Astragalus curvicarpus Beecher Crampton 1970-6-26 8639 Lassen Lassen County, 10 miles north of Milford. Comment
  CHSC60899  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald; Lowell Ahart 1993-7-8 5662 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Edge of woods between the road and railroad. 1709 Comment
  UC84408  Astragalus curvicarpus var. curvicarpus unknown 1892-6-23 Lassen Honey Lake Comment
  CHSC64876  Astragalus filipes Vernon H. Oswald; Lowell Ahart 1995-6-19 6883 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395. In wash on n side of road. 1371 Comment
  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
  CAS-BOT-BC186861  Astragalus gibbsii Philip A. Munz 1947-5-20 11889 Lassen Milford 1264 Comment
  SEINET3416806 Image available Astragalus gibbsii Lewis S. Rose 1940-6-16 40595 Lassen Susanville, Susanville. 1280 Comment
  SEINET948354  Astragalus gibbsii Philip A. Munz 1947-1 11889 Lassen Milford 1265 Comment
  CAS-BOT-BC186863  Astragalus gibbsii H. D. Ripley; R. C. Barneby 1943-6-13 5692 Lassen South of Milford 1432 Comment
  SEINET10970063  Astragalus gibbsii Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 881 Lassen Collected 3 mi n of milford, on hwy 395 at honey lake campgrounds. Comment
  CAS-BOT-BC186914  Astragalus inversus H. D. Ripley; R. C. Barneby 1943-6-14 5740 Lassen Mesa W. of Susanville 1371 Comment
  POM180437  Astragalus inversus T. S. Brandegee 1892-7-1 s.n. Lassen Susanville Comment
  RSA111019  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 5740 Lassen 3 miles west of Susanville. Comment
  SEINET5324147  Astragalus iodanthus var. iodanthus A. Tiehm 1980-1 5755 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1231 Comment
  CAS-BOT-BC229050  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC115597  Astragalus lemmonii Lowell Ahart; John Dittes 2015-7-14 20336 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  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
  JEPS118159  Astragalus lentiginosus var. floribundus Dean W. Taylor 2009-5-20 20605 Lassen Widow Valley; Big Valley Mountains, logging road ca. 1 air mi NW of Brown Cabin (USGS map, site) 1478 Comment
  JEPS87395  Astragalus lentiginosus var. floribundus Vernon H. Oswald and Lowell Ahart 1993-7-8 5663 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi n Hwy 44 (se edge Poison Lake); se edge Poison Lake 1709 Comment
  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
  CHSC99508  Astragalus lentiginosus var. lentiginosus Lowell Ahart; John Dittes 2008-6-22 15046 Lassen Open meadow, east of the old barn, east of the dirt road, open meadow area, in Big Valley, about 4.7 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.7 miles (air) northeast of Bieber. 1268 Comment
  RSA0006801  Astragalus lentiginosus var. lentiginosus H. D. Ripley, R. C. Barneby 1943-6-14 5724 Lassen Mountains W of Susanville 1448 Comment
  CHSC71388  Astragalus lentiginosus var. salinus Vernon H. Oswald; B. Corbin, A. Sanger, G. Schoolcraft 1998-7-6 9247 Lassen East side of Eagle Lake on BLM land just east of the Lassen Youth Camp. 1584 Comment
  JEPS114762  Astragalus lentiginosus var. salinus Lowell Ahart, John Dittes 2008-6-19 14889 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  CAS-BOT-BC187560  Astragalus malacus B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6551 Lassen Just S of Ravendale 1580 Comment
  CDA19719  Astragalus malacus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Madeline. 0 Comment
  CHSC71083  Astragalus malacus Vernon H. Oswald; Lowell Ahart 1998-5-22 9104 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
  NY676232  Astragalus malacus B. J. Cox 1971-6-2 2599 Lassen Hallalujah Jct. intersection of U.S. Highway 395 and Calif. Highway 70 1433 Comment
  JEPS87063  Astragalus pulsiferae Dean Wm. Taylor with Glenn Clifton 1990-6-12 10877 Lassen ca 0.5 mi before the Modoc County Line (road from Adin to Ash Valley (Forest Road 88)); Modoc Plateau, road from Adin to Ash Valley 1554 Comment
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Jan 31 2015
  UC13449  Astragalus pulsiferae J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Chat Long Valley, Honey Lake Valley, Chat (Long Valley, Honey Lake Valley) Comment
  NY694120  Astragalus pulsiferae var. coronensis N. H. Holmgren 1980-7-4 9500 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 1890 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
  CHSC98311  Astragalus pulsiferae var. pulsiferae R. Ondricek-Fallscheer 1999-7-2 196 Lassen About 3/4 air mi SW of Hallelujah Junction (the junction of Hwy 70 and Hwy 395). 1499 Comment
  NY694127  Astragalus pulsiferae var. pulsiferae See comments 1981-6-23 614 Lassen West of Susanville 1463 Comment
  RSA201487  Astragalus pulsiferae var. pulsiferae J. T. Howell 1955-7-19 30818 Lassen East side of Beckwourth Pass 1493 Comment
  CHSC21173  Astragalus purshii M. S. Taylor 1975-5-4 224 Lassen Ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. Comment
  CHSC7668  Astragalus purshii Beverley J. Wise 1969-4-21 57 Lassen 6 mi. south of Susanville on Las. Co. Rd. 204 (Gold Run Road). 1310 Comment
  SEINET10452237  Astragalus purshii Mary Susan Taylor 1974-1 Taylor 257 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  SEINET6654255  Astragalus purshii var. lagopinus Stanley L. Welsh, N. Duane Atwood 2001-6-14 28157 Lassen E of Hwy 395, rd to Rams Horn Spring campground.; 0 1539 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
  CHSC60739  Astragalus purshii var. purshii Vernon H. Oswald; Lowell Ahart 1993-6-14 5520 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  JEPS127726  Astragalus purshii var. purshii H. Chappel, K. Moran & K. Strassman 2002-6-27 ALT- 013 Lassen Pit River Valley/Beaver Creek BLM land Comment
  RSA715542  Astragalus purshii var. purshii L. Ahart 2005-6-1 11870 Lassen About 1/2 miles 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-BC194089  Astragalus purshii var. purshii C. R. Quick 1964-7-28 64 -84 Lassen Edge of Halls Flat , Black's Mt. Experimental Forest Comment
  POM45166  Astragalus purshii var. tinctus T. S. Brandegee 1892-6-23 s.n. Lassen Honey Lake Comment
  CHSC26427  Astragalus whitneyi Gary McGrath 1976-6-15 12 Lassen Dean's Ridge, southwest facing slope, 25 km nw of Susanville. 1930 Comment
  UC1128897  Astragalus whitneyi A. Simontacchi 1940-6-6 824 Lassen 9.3 mi se Nigger Cabin; Lassen National Forest, Halls Flat Quad. Comment
  UCD105481  Astragalus whitneyi B. L. Kay 1961-6-28 s.n. Lassen 6 miles northwest of Madeline. Comment
  CAS-BOT-BC200869  Astragalus whitneyi var. confusus D. B. Dunn; B. J. Cox 1971-6-2 17770 Lassen Approx. 12 mi. S. of Adin on Calif. Hwy. 139 1371 Comment
  JEPS108557  Astragalus whitneyi var. siskiyouensis L. P. Janeway 2005-7-4 8469 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  NY701850  Astragalus whitneyi var. siskiyouensis B. J. Ertter 1987-6-16 7183 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  SEINET3025898  Astragalus whitneyi var. sonneanus Marcus E. Jones 1897-6-28 Lassen Top of Diamond Peak, Susanville. Perkin's Ranch. 2230 Comment
  JEPS118271  Athysanus pusillus Lowell Ahart, John Dittes 2011-6-20 17491 Lassen About 40 yards east of the stream, about 70 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CAS-BOT-BC17439  Athysanus pusillus George Haley 1927-4-15 s.n. Lassen Constantia. Comment
  UC295904  Atriplex argentea H. M. Hall 1925-8-31 12215 Lassen Amedee Comment
  SEINET5344853  Atriplex canescens S. Massed, Jared Jaggers, D. Mathews 2011-10-24 Seeds of Success. NV 030 . Carson Lassen Northeast of Doyle. On the Northern slopes of Fort Sage Mountains. 1291 Comment
  CHSC109992  Atriplex canescens var. canescens L. P. Janeway; B. Castro 2012-7-2 10920 A Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake, 1.5 km north of Wendel, 0.8 km east of the road to Wendel. 1241 Comment
  UC527347  Atriplex confertifolia C. B. Wolf 1931-9-5 2402 Lassen on road to Doyle 1/2 mi from Amedee R.R. station (Honey Lake Valley); , 1/2 mi from Amedee R.R. station Comment
  POM102968  Atriplex gardneri var. falcata Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CHSC76092  Atriplex heterosperma Lowell Ahart; Vernon Oswald 1999-9-13 8204 Lassen On the west side of the dirt road and 1/4 mi south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  RSA518558  Atriplex rosea George K. Helmkamp 1990-9-23 H- 7 Lassen N of Ravendale 1677 Comment
  UC219338  Atriplex rosea H. M. Hall 1921-9-11 11682 Lassen s side Honey Lake Valley; s side Honey Lake Valley Comment
  CHSC100131  Atriplex truncata L. P. Janeway 2008-8-2 9528 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Ranch Road 1.8 km west of the CA-NV line. 1349 Comment
  UC1037136  Avena fatua Leo Whitney 1935-5-27 3121 Lassen Bieber Comment
  UC88459  Balsamorhiza T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  JEPS103182  Balsamorhiza G. Schoolcraft 2000-4-26 2893 Lassen West of Grasshopper Valley 1706 Comment
  POM35967  Balsamorhiza deltoidea Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC106496  Balsamorhiza hookeri Doris Kildale Gillespie 1930-5-13 9363 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC106497  Balsamorhiza hookeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49167 Lassen In open yellow pine forest, Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  UC1119024  Balsamorhiza sagittata C. W. Hanks 1934-8-18 56 Lassen n part of Upper Long Valley (Sierraville); Sierraville 1463 Comment
  UC1137703  Balsamorhiza sagittata A. Simontacchi 1940-6-4 802 Lassen 7.0 mi sw of Jacks Lake (Halls Flat); Halls Flat 1828 Comment
  CAS-BOT-BC16436  Barbarea orthoceras John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49177 Lassen Sierra Nevada. Elysian Valley, northwest of Janesville. 1325 Comment
  UCD97537  Bassia hyssopifolia E. K. Balls; P. C. Everett 1952-10-10 18137 Lassen 0.7 mi. e. of Standish, Hwy. 395, between Susanville and Alturas. 1249 Comment
  CDA31539  Beckmannia syzigachne T. C. Fuller 1963-6-1 10625 a Lassen 3.2 mi south of Pittville on east side of road to Susanville. 0 Comment
  UC790979  Beckmannia syzigachne A. A. Beetle 1941-6-28 2813 Lassen lower slopes of peak 6 mi s Ravendale; Observation Peak Comment
  CAS-BOT-BC76025  Berberis repens Parkison 1916-6-17 13 Lassen Lassen Forest. North slope Crater Mountain. 1706 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
  UC1790750  Berteroa incana Arnold Tiehm 2005-7-14 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road mi W of Hwy 395 on Hwy 70, then 5.5 road mi N on Scott Road 1493 Comment
  CAS-BOT-BC169400  Betula glandulosa John Thomas Howell 1934-7-9 12514 Lassen Bridge Creek Spring Comment
  HSC95181  Betula glandulosa Gordon Leppig 1998-7-12 957 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95198  Betula glandulosa Gordon Leppig, J. Cromwell 1997-7-26 599 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1135177  Betula glandulosa D. Dunning 1935-9-5 Lassen Bridge Creek Lassen National Forest, Eagle Lake Quadrangle Comment
  CHSC58833  Betula pumila var. glandulifera Vernon H. Oswald; Lowell Ahart 1992-7-16 5116 Lassen On Bridge Creek, W of the Cinder Pit on the logging road paralleling the E side of the creek, 1.3 mi N of Hwy. 44 and McCoy Flat Reservoir, between Old Station and Susanville. 1719 Comment
  CAS-BOT-BC128046  Blepharipappus scaber David D. Keck; J. Clausen 1935-6-25 3754 Lassen Susanville, on hills just west of town 1310 Comment
  SBBG22255  Blepharipappus scaber C. B. Hardham 1961-6-16 7451 Lassen Gold Run Crk, S of Susanville Comment
  SEINET9331153  Blepharipappus scaber Unknown 1974-8-20 1932 Lassen Survey w/ state and county personnel, Hallelujah Jct, NW corner of jct of US hwy 495 and hwy 70. USGS Quad: 15' Plant Systematics Lab/Herbarium CDA, California Dept. of Food & Agric Comment
  CAS-BOT-BC128047  Blepharipappus scaber B. J. Hammerly 1941-6-21 49 Lassen Dry plateau 8 mi. SE. of Likely on Blue Lake road Comment
  CAS-BOT-BC128049  Blepharipappus scaber D. Toren; B. Trowbridge 1975-6-20 5255 a Lassen Roadside, Jess Valley to Blue Lake Campground 1676 Comment
  SEINET10912069  Blepharipappus scaber David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17767 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
  CAS-BOT-BC16826  Boechera Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16325 Lassen Along southern shore of Eagle Lake. Comment
  CAS-BOT-BC13905  Boechera lemmonii Eben McMillan 1968-6-28 140 -2 Lassen South slope of Mount Lassen. Comment
  JEPS114362  Boechera puberula Lowell Ahart, John Dittes 2008-6-19 14883 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  CHSC101020  Boechera retrofracta John Dittes 2008-5-22 1533 Lassen Modoc Plateau; ca 15.4 air miles southeast of Adin, ca. 3.6 air miles east of Hayden Hill, ca. 0.2 mile southeast of intersection of Hwy 139 and FS Road 36N02; edge of wooded volcanic toe-slope on northeast side of Willow Creek. 484 Comment
  CHSC60730  Boechera retrofracta Vernon H. Oswald; Lowell Ahart 1993-6-14 5512 Lassen Lassen A1 (Eagle Lake Rd.) 1.0 mi N of its jct. with Lassen A21 (32N02), on the W edge of Brockman Flat Lava Beds, ca. 4 mi (air) W of Eagle Lake. Roadside. 1810 Comment
  RSA121169  Boisduvalia glabella G. A. Fischer, Irwin H. Johnson 1933-7-12 F- 197 Lassen Grass Valley (Dry Lake), Lassen [National] Forest 1695 Comment
  JEPS103163  Bolboschoenus maritimus B. Corbin and D. Armentrout 2002-9-4 1098 Lassen Biscar Reservoir, upper pond. 1357 Comment
  JEPS95898  Bolboschoenus maritimus subsp. paludosus Lowell Ahart 1999-9-13 8221 Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  SD8418  Boykinia major Mrs. R. M. Austin 1877-1 Lassen Spanish Peak Comment
  CHSC36451  Bromus briziformis Susan H. Euing 1982-6-2 5 Lassen Ca. 5 yds n of Ravendale Rd, ca. 3 1/2 mi e of Hwy 139 and Ravendale Rd. Comment
  CHSC7689  Bromus briziformis Beverley J. Wise 1969-5-16 125 Lassen 34.5 mi. S. E. of Susanville on Co. Rd 320. (Stacey) 1584 Comment
  CHSC80306  Bromus briziformis Jeanne Boze 1981-6-11 101 Lassen About 4 m from road, back from Horse Lake Road, 5.5 mi from Hwy 139. 1676 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
  CDA31386  Bromus carinatus var. carinatus D. R. Hill 1968-7-8 Lassen James R. Reynolds ranch, Revendale. 0 Comment
  UC1024689  Bromus carinatus var. carinatus Leo Whitney 1933-7-15 2156 Lassen 16 mi w of upper end of Eagle Lake (Lassen National Forest, Harvey Mountain); Lassen National Forest, Harvey Mountain Comment
  UC1024795  Bromus carinatus var. carinatus Leo Whitney 1935-6-10 3212 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10 Lassen National Forest; , Fruit Grower's Supply Company Comment
  UC1137778  Bromus carinatus var. carinatus August L. Hormay 1934-6-30 Lassen Lassen National Forest, Harvey Mountain, Lassen Forest and Range Experiment Station Harvey Mountain; Lassen National Forest, Harvey Mountain 2133 Comment
  CHSC23516  Bromus carinatus var. marginatus Wayne O. Baum 1971-7-5 71 -13 Lassen E. slope of Gallatin Peak. 1981 Comment
  UCD59098  Bromus carinatus var. marginatus Beecher Crampton 1954-7-5 2055 Lassen Along Hwy. 36, 4.5 miles west of Susanville. 1432 Comment
  UCD59217  Bromus carinatus var. marginatus L. Whitney 1935-6-19 3262 a Lassen Fruit Grower's Supply Company, Lassen National Forest. Comment
  CAS-BOT-BC155941  Bromus commutatus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49519 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  UC1037118  Bromus commutatus Leo Whitney 1934-7-22 2249 Lassen 5 mi w of lower end of Eagle Lake (Lassen National Forest, Antelope Mountain); Lassen National Forest, Antelope Mountain 1981 Comment
  UCD58448  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UCR119122  Bromus hordeaceus Beecher Crampton 1954-7-5 2067 Lassen Modoc Plateau, 5 miles west of Susanville. 1448 Comment
  CAS-BOT-BC155323  Bromus inermis John Thomas Howell; Gordon H. True 1973-8-1 50221 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. 2164 Comment
  SEINET10717734  Bromus japonicus Vernon H. Oswald, Lowell Ahart 1999-6-9 Oswald 9750 Lassen T31N R15E SE 1/4 Sect. 18. Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Comment
  UC1137124  Bromus tectorum August L. Hormay 1929-5-20 Lassen Lassen National Forest, Hat Creek Hat Creek; Lassen National Forest, Hat Creek Comment
  UCD59851  Bromus tectorum L. Whitney 1933-8-8 s.n. Lassen Lassen National Forest. 1920 Comment
  CAS-BOT-BC185530  Bromus vulgaris John Thomas Howell; Gordon H. True 1973-7-31 50056 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  RSA772870  Callitriche hermaphroditica R. F. Thorne, Larry E. DeBuhr 1975-8-22 47204 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  POM85831  Callitriche heterophylla var. bolanderi Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CHSC12426  Calocedrus decurrens Anne Linda Brisk 1969-6-20 12 Lassen 5.5 mi S of ELBS on Road 5.16.2. 1920 Comment
  UCD132943  Calocedrus decurrens T. E. Weier; Katrina Weier 1946-9-1 s.n. Lassen Lassen National Park. Comment
  SEINET11051598  Calocedrus decurrens D. Charlet 1996-7-8 2289 Lassen Sierra NV, Diamond Mountains, East Canyon, Milford Grade, Laufman Campground. 1620 Comment
  HSC15373  Calochortus bruneaunis M. T. Milligan 1964-8-6 209 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CHSC6270  Calochortus leichtlinii W. Vinyard 1946-6-17 Lassen Mt. Fredonyer, Eagle Lake. 2133 Comment
  UC1537209  Calochortus leichtlinii Gordon H. True Jr. 1936-6-25 533 Lassen n side Hog Flat Reservoir 1524 Comment
  CAS-BOT-BC483438  Calochortus macrocarpus David D. Keck 1944-7-8 5452 Lassen 1.5 miles west of Susanville, on rim of plateau overlooking Susan River Canyon 1341 Comment
  HSC12524  Calyptridium umbellatum Marcus E. Jones 1897-6-28 Lassen Diamond Mtn., Susanville, Perkin's Ranch 2226 Comment
  SEINET196249  Calyptridium umbellatum F. Farris 1936-6-15 Lassen Eagle Lake Rd 1676 Comment
  SEINET194898  Calyptridium umbellatum A. A. Heller 1938-6-22 15139 Lassen 1 mi E of Westwood along St Hwy 36 1524 Comment
  RSA122815  Calystegia occidentalis subsp. occidentalis L. R. Short, Wm. Gansberg 1936-7-3 S- 469 Lassen MDM, Burgess Spr. Exp. Range. 1849 Comment
  UC1123631  Calystegia occidentalis subsp. occidentalis A. Simontacchi 1940-6-30 901 Lassen 2.6 mi s Ladder Butte; Halls Flat, Lassen National Forest, Ladder Butte Comment
  RSA339996  Calystegia polymorpha Noel Holmgren, Patricia K. Holmgren, A. H. Holmgren 1980-7-9 9581 Lassen Surprise Valley, 23.7 km (14.7 mi) south of Fort Bidwell. 1402 Comment
  CHSC107327  Camassia quamash subsp. breviflora Lowell Ahart; John Dittes 2011-6-20 17492 Lassen Depression in meadow, about 40 yards east of the stream, about 80 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CAS-BOT-BC497552  Camassia quamash subsp. breviflora John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49223 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC497555  Camassia quamash subsp. breviflora G. S. Crew 1927-6-10 55836 Lassen Norval flat Comment
  OBI76938  Camelina microcarpa Anthony Baniaga 2011-6-10 321 Lassen Along hwy 395 ca. 6.6 mi S of Karlo Rd quad 1220 Comment
  NY608998  Camelina microcarpa G. Schoolcraft 1998-6-23 2737 Lassen Next canyon north of Ramhorn Springs Campground 1828.8 Comment
  POM38501  Camissonia claviformis subsp. cruciformis Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  CHSC71092  Camissonia pubens Vernon H. Oswald; Lowell Ahart 1998-5-22 9136 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. Roadside banks. 1341 Comment
  NY852074  Camissonia tanacetifolia Mrs. C. C. Bruce 06 1898 2203 Lassen Susanville Comment
  HSC42415  Camissonia tanacetifolia Barbara Kelly 1977-8-9 565 Lassen 14.3 mi. E of Madeline on the dirt road from Adin Comment
  RSA144901  Camissonia tanacetifolia G. I. Stage, R. Thorp 1959-6-21 59 -117 Lassen 5.1 miles north of Termo Comment
  CAS-BOT-BC160858  Camissonia tanacetifolia subsp. tanacetifolia Mrs. C. C. Bruce 1898-6-1 2203 Lassen Susanville Comment
  RSA186587  Camissonia tanacetifolia subsp. tanacetifolia Peter H. Raven 1962-5-28 17875 Lassen 11.6 miles north of Litchfield Comment
  RSA60365  Camissonia tanacetifolia subsp. tanacetifolia E. K. Balls 1950-5-9 15954 Lassen 0.5 mi. south of Modoc Co. Line, Highway 395 1220 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
  CDA3662  Cardaria chalepensis T. C. Fuller 1964-10-7 12695 Lassen Hillside Cemetery, south side of Highway 299 to Fall River Mills, ca. 1 mile southwest of Nubieber. 0 Comment
  JEPS124368  Carduus nutans Lowell Ahart, John Dittes, Joe DiSalvo 2015-7-14 20322 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CAS-BOT-BC17909  Carex angustata Leo Whitney 1934-7-31 1972 Lassen Bridge Creek Camp. 1737 Comment
  UC190429  Carex angustata M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CAS-BOT-BC18105  Carex athrostachya John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49456 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  SD130377  Carex athrostachya John Thomas Howell 1973-7-10 49780 Lassen Sierra Nevada; open Jeffrey pine forest, Fredonyer Pass. 1737 Comment
  CHSC77240  Carex aurea G. Schoolcraft 1996-9-5 2553 Lassen N. side of Biz Johnson Trail. 1402 Comment
  HSC95154  Carex cusickii Gordon Leppig 1998-7-12 936 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95169  Carex cusickii Gordon Leppig 1998-7-12 952 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95276  Carex cusickii Gordon Leppig, J. Cromwell 1997-7-27 620 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CHSC110089  Carex davyi Barbara L. Wilson; Peter Zika 2011-8-7 16805 Lassen Highway 44 near mile post 12.50, at junction with road 32N22 and road to Harney Valley. 1740 Comment
  CAS-BOT-BC34933  Carex densa T. C. Fuller 1966-7-20 14963 Lassen South side of road to Pittville, 5.4 miles west of Little Valley Post Office. NW Lassen County. Comment
  CAS-BOT-BC19779  Carex douglasii John Thomas Howell 1934-7-6 12450 Lassen Harvery Valley. Comment
  JEPS107458  Carex douglasii Lowell Ahart, John Dittes 2005-6-1 11863 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UC1924590  Carex douglasii Debra Valov 2006-5-28 2006020 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  CAS-BOT-BC75502  Carex echinata var. ormantha Leo Whitney 1934-8-2 1967 Lassen Bridge Creek Camp. 1737 Comment
  CHSC89755  Carex filifolia var. erostrata L. P. Janeway 2004-6-26 8162 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  HSC48360  Carex filifolia var. erostrata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19171 Lassen Open pasture in Harvey Valley near Cone Springs Comment
  SEINET7558599 Image available Carex filifolia var. erostrata John Thomas Howell 1934-7-6 12451 Lassen Harvey Valley. Comment
  CAS-BOT-BC34002  Carex filifolia var. filifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49194 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CAS-BOT-BC21302  Carex fracta John Thomas Howell 1976-7-19 51968 Lassen Sierra Nevada. On Gold Run Creek southwest of Susanville. 1386 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
  CHSC60435  Carex hoodii Mary Ann Showers 1992-6-12 2517 Lassen Lassen Volcanic National Park. Meadow enclosed by lava flow, Butte Lake. 1859 Comment
  SEINET7561726 Image available Carex hoodii L. P. Janeway 2003-7-24 7917 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14. 1.1 km from Road 30N21, small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  UC2031875  Carex hoodii Nick Otting and Bruce Newhouse 2003-7-15 705 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 air miles south-southwest of Susanville. Comment
  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
  UC1609339  Carex lasiocarpa Vernon H. Oswald and Lowell Ahart 1993-8-3 5752 Lassen e Silver Lake (nw part of the swamp, just e of the Caribou Wilderness, ca. 13 mi (air) n of Lake Almanor); Cooper Swamp 1932 Comment
  HSC103653  Carex lenticularis var. limnophila Thomas W. Nelson, Jane Nelson 1985-8-10 8010 Lassen Along north side of Silver Lake 1829 Comment
  CHSC97050  Carex limosa Gordon Leppig; J. Cromwell 1997-7-27 610 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC31610  Carex luzulina var. ablata Harold Bailey; Virginia Bailey 1948-8-25 2976 Lassen Summit Lake. 2040 Comment
  UC1136940  Carex microptera George A. Fischer, Irwin H. Johnson 1933-7-12 F 237 Lassen Patterson Flat Lassen Forest 1737 Comment
  CAS-BOT-BC31946  Carex microptera Clare B. Hardham 1971-8-22 18373 Lassen Streamside, Diamond Mt. 2346 Comment
  JEPS103202  Carex microptera G. Schoolcraft 1994-7-7 2366 A Lassen south end of Warner Mountains West of Boot Lake 2194 Comment
  CHSC29957  Carex multicostata Robin L. Ondricek 1978-6-27 78 Lassen On Coleman Lake Rd., .7 mi ne of Lassen Co. Rd. A1. 1950 Comment
  JEPS28339  Carex nebrascensis George W. Gillett 1957-7-22 881 Lassen Lassen Volcanic National Park, Snag Lake, Campsite near south shore Snag Lake; Lassen Volcanic National Park, Snag Lake 1850 Comment
  SEINET7568737 Image available Carex nebrascensis L. P. Janeway 2003-7-24 7913 Lassen Pegleg Mountain 7.5' quad. High Cascade Range, at lower end of a meadow and marsh along Bridge Creek, 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  UC1142949  Carex nebrascensis A. L. Hormay 1941-6-18 7 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  HSC103614  Carex nebrascensis Thomas W. Nelson, Jane Nelson 1985-8-10 8005 Lassen Along north side of Silver Lake 1829 Comment
  CAS-BOT-BC119041  Carex pellita John Thomas Howell 1976-7-19 s.n. Lassen On Gold Run Creek SW of Susanville 1386 Comment
  CAS-BOT-BC119043  Carex pellita George Wilson Gillett 1957-7-26 906 Lassen East Shore of Butte Lake, along water line. 1844 Comment
  CHSC65364  Carex pellita Vernon H. Oswald 1995-8-21 7209 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. 1859 Comment
  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
  CHSC77249  Carex praegracilis G. Schoolcraft 1997-7-30 2625 Lassen W slope of Diamond Mtn. 1889 Comment
  JEPS118273  Carex praegracilis Lowell Ahart, John Dittes 2011-6-20 17477 Lassen About 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  UC1133503  Carex praegracilis Robert W. Gardner 1939-6-15 G- 37 Lassen Little Harvey Valley Halls Flat Quadrangle Comment
  UC190401  Carex praegracilis M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley Comment
  UC2031884  Carex praegracilis Nick Otting 2003-7-16 689 Lassen Modoc Plateau, Smoke Creek, 13.5 air miles east-southeast of Ravendale. Comment
  CHSC54424  Carex raynoldsii Vernon H. Oswald 1991-6-25 4695 Lassen Lassen Volcanic National Park. Butte Lake-Snag Lake Trail, just south of its junction with Butte Lake-Widow Lake Trail, in the northeast corner of the park. 1842 Comment
  HSC48218  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19222 Lassen 2 mi. N of Westwood Comment
  CAS-BOT-BC118229  Carex scopulorum var. bracteosa John Thomas Howell 1934-6-14 12162 Lassen Near Lost Lake, Warner Mts. 2438 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
  CAS-BOT-BC116625  Carex subfusca Alice Eastwood; John Thomas Howell 1940-6-15 8304 Lassen Willow Creek near Hayden Hill. Comment
  SEINET4292053 Image available Carex subfusca Unknown 2004-1 8169 Lassen High Cascade Range, along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat; Blacks Mountain Experimental Forest. 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
  HSC95285  Carex vesicaria Gordon Leppig 1998-8-17 1040 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
  JEPS63615  Carex whitneyi Leland S. Smith 1922-7-23 75 Lassen Lassen National Forest Comment
  RSA275376  Carex whitneyi D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19241 Lassen About 2 miles north of Westwood. Comment
  RSA298353  Carex whitneyi D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19241 Lassen About 2 miles north of Westwood. Comment
  RSA517387  Carex whitneyi Leland S. Smith 1922-7-23 75 Lassen Lassen National Forest. Comment
  CAS-BOT-BC248944  Castilleja Mike Vasey 1990-6-30 9055 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  JEPS79146  Castilleja angustifolia L. R. Heckard with R. Bacigalupi 1980-6-11 5249 Lassen about 8 mi ne Litchfield (along U.S. Hwy 395) 1371 Comment
  CHSC67068  Castilleja applegatei Willis Ball 1969-6-20 20 Lassen Found approx. 2 mls. down from Dean's Meadow going towards 5 pts. 1828 Comment
  HSC93502  Castilleja applegatei subsp. disticha Gordon Leppig, Tony LaBanca 1998-7-13 965 Lassen Modoc National Forest, Blue Lake Ranch 1799 Comment
  CHSC23477  Castilleja applegatei subsp. pinetorum Wayne O. Baum 1971-7-6 71 -36 Lassen E. slope of Gallatin Peak. 1920 Comment
  JEPS107871  Castilleja applegatei subsp. pinetorum Lowell Ahart, John Dittes 2005-6-2 11929 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  JEPS85742  Castilleja applegatei subsp. pinetorum Roy E. Buck and Robert A. Price 1988-6-26 1030 Lassen ca 0.5 air mi n Fredonyer Peak main summit (on subsidiary peak, ca 30 air mi nne of Susanville); Fredonyer Peak 2377 Comment
  UC1063043  Castilleja applegatei subsp. pinetorum A. Simontacchi 1940-5-16 728 Lassen 2.3 mi wnw Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1924599  Castilleja applegatei subsp. pinetorum Debra Valov 2006-5-28 2006009 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1291 Comment
  UC444860  Castilleja applegatei subsp. pinetorum Franklin P. Nutting Lassen s of Eagle Lake (mountains) Comment
  UCR268960  Castilleja applegatei subsp. pinetorum Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31428 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
  UC1563850  Castilleja arachnoidea Barbara Ertter 1988-7-25 7861 Lassen ca 1.5 mi e Diamond Peak (ca 10 air mi due s of Susanville, ridge of Diamond Mts); Diamond Mts. 2286 Comment
  SJSU5841  Castilleja campestris J. W. Tilden 1958-6-27 1291 Lassen Madeline Comment
  SEINET3836934 Image available Castilleja campestris Marcus E. Jones 1897-7-3 Lassen Pratville 1372 Comment
  JEPS23848  Castilleja campestris subsp. campestris Peter H. Raven and Otto T. Solbrig 1959-6-17 13295 Lassen 4.8 mi s Madeline (along U.S. Hwy 395) Comment
  JEPS66447  Castilleja campestris subsp. campestris L. R. Heckard and P. Rubtzoff 1971-8-4 2708 Lassen about 10 mi n Termo (along U.S. Hwy 395) Comment
  UC1609193  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
  UC604559  Castilleja campestris subsp. campestris C. W. Sharsmith 1938-7-18 3631 Lassen 2 mi s Madeline; Madeline Plains Comment
  SEINET10457537  Castilleja disticha Morris 1973-5-25 MORRIS 221 Lassen Collected in an area of sugar pine, libcedrus, and yellow pine. 2.5 Mi n of jct 36 and hwy 44. Comment
  CHSC117210  Castilleja lacera Lowell Ahart; John Dittes 2016-6-7 20993 Lassen West of pond, 110 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 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
  CHSC1714  Castilleja linariifolia 1944-7-5 Lassen Bogard. 1722 Comment
  CHSC6268  Castilleja linariifolia P. Balch 1955-7-21 Lassen Willow Creek, Eagle Lake. 1463 Comment
  CHSC63419  Castilleja linariifolia Vernon H. Oswald 1994-7-8 6369 Lassen Wildlife Viewing Area along Hwy. 139 on the NE shore of Eagle Lake, 5.9 mi S of County Rd. 201 (A1). 1557 Comment
  CAS-BOT-BC244896  Castilleja miniata Clare B. Hardham 1971-8-22 18382 Lassen Granitic slope west of Janesville Comment
  POM44361  Castilleja miniata Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  CAS-BOT-BC241002  Castilleja pilosa Doughitt; Parkison 1916-6-8 4 Lassen Lassen National Forest. Harvey Valley 1676 Comment
  CAS-BOT-BC241005  Castilleja pilosa Margaret Williams; Lyn Wise 1976-5-31 76- 22 -1 Lassen Near Nervine Aero Service, E of Beckwourth 1524 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
  JEPS80677  Castilleja pilosa L. R. Heckard and T. I. Chuang 1981-6-10 5529 Lassen about 0.5 mi e Nubieber 1249 Comment
  CHSC112415  Castilleja tenuis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18773 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC60853  Castilleja tenuis Vernon H. Oswald; Lowell Ahart 1993-6-28 5576 Lassen Harvey Valley Rd. (33N02), 0.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1749 Comment
  JEPS107826  Castilleja tenuis Lowell Ahart, John Dittes 2005-6-2 11962 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  JEPS4336  Castilleja tenuis Brown and Wieslander 1922-7-18 36 Lassen Martin Springs; Eagle Lake Comment
  RSA0105574  Castilleja tenuis Lowell Ahart, John Dittes 2013-7-22 18840 Lassen About 30 yards southeast of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CAS-BOT-BC39555  Caulanthus major T. Prendusi 1980-7-21 30 Lassen Fredonyer Peak. 2377 Comment
  UC1477727  Caulanthus major var. nevadensis Teresa Prendusi 1980-7-21 30 Lassen Fredonyer Peak 2377 Comment
  CHSC46505  Ceanothus cordulatus Lowell Ahart 1974-7-9 514 Lassen Growing along the edge of Eagle Lake Road on dry stony soil, about 4 miles west of Susanville. 1584 Comment
  CAS-BOT-BC48532  Ceanothus cordulatus Brighton C. Cain 1925-8-24 97 Lassen Mt. Lassen Volcanic National Park 1 mi. below Drakesbad 1645 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
  CHSC6249  Ceanothus prostratus J. B. Kimsey 1946-6-17 Lassen Mt. Fredonyer. 2133 Comment
  HSC42297  Ceanothus prostratus S. Saufferer 1973-5-6 124 Lassen 4.5 mi W of Bieber along Hwy. 299 Comment
  UC1071528  Ceanothus prostratus Robert W. Gardner 1937-6-14 G- 2 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UC1281294  Ceanothus prostratus H. E. McMinn 1941-8-27 5400 Lassen 3.5 mi from Pine Cone Inn (5 mi from Newbieber [Neubieber?]); 5 mi from Neubeiber Comment
  SEINET5339354  Ceanothus prostratus W. Priest 1956-4-27 s.n. Lassen 2 miles north of Susanville on US 395 1524 Comment
  CHSC5047  Ceanothus velutinus L. B. Barlow 1967-7-1 64 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road. 1554 Comment
  CAS-BOT-BC52438  Ceanothus velutinus var. velutinus John Thomas Howell 1924-8-13 637 Lassen Between Chester and Westwood Comment
  OBI4702  Cenchrus longispinus T. C. Fuller 1965-10-13 14198 Lassen On N side of old rd to Susanville, 1 mi W of Johnstonville Comment
  RSA121127  Centaurea repens E. Sawyer 1935-6-27 239 Lassen 5 miles NNE of Beckwith Pass Comment
  CAS-BOT-BC284470  Centaurea solstitialis Yeager 1929-8-29 s.n. Lassen Honey Lake District 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
  CDA7344  Centaurea squarrosa Loring White 1950-8-19 Lassen Cramer Ranch. Big Valley. 0 Comment
  SEINET13331314 Image available Centaurea virgata subsp. squarrosa T. C. Fuller unknown s.n. Lassen Big Valley Comment
  JEPS84967  Centaurium exaltatum Barbara Ertter 1987-7-24 7305 Lassen ca 0.75 mi ene Beckwourth Pass (at the end of old crumbling paved road) 1524 Comment
  UC762592  Centromadia pungens subsp. pungens R. F. Hoover 1940-10-1 4657 Lassen between Janesville and Standish; Honey Lake Comment
  CAS-BOT-BC388151  Cerastium fontanum John Thomas Howell; Gordon H. True 1973-8-1 50162 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC388153  Cerastium fontanum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49480 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC400184  Ceratophyllum demersum R. Carter 1967-7-13 593 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek 1560 Comment
  UC956834  Ceratophyllum demersum Herbert L. Mason and Verne Grant 1947-7-9 13295 Lassen irrigation ditch 5 mi e Bieber Comment
  SD51284  Cercocarpus betuloides Darley F. Howe 1961-8-4 Lassen 12 miles east of Mc Arthur on US 299 Comment
  UCD35729  Cercocarpus ledifolius Beecher Crampton 1960-6-18 5710 Lassen Southern Warner Mountains, vicinity of Blue Lake Ranch. 1981 Comment
  UC764012  Cercocarpus ledifolius var. ledifolius R. F. Hoover 1940-9-21 4604 Lassen 4 mi w of Susanville Comment
  CHSC80142  Chaenactis douglasii Jeanne Boze 1981-6-11 102 Lassen Along roadside, 5.5 mi from Hwy 139 on Horse Lake Road. 1676 Comment
  SDSU6452  Chaenactis douglasii D. F. Howe 1964-7-31 3904 Lassen Modoc National Forest, 10.2 miles from entrance of the forest. 1768 Comment
  CAS-BOT-BC276614  Chaenactis douglasii var. douglasii Louella Bass 1978-7-11 78 -10 Lassen Elysian Valley 1325 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
  HSC28855  Chaenactis douglasii var. douglasii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19288 Lassen Along Hwy. 395, 4 mi. E of Standish 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
  UC30985  Chaenactis douglasii var. douglasii J. Burtt Davy Jun 17 1897-Jun 24 1897 3410 Lassen Amedee Honey Lake Valley Comment
  UC579800  Chaenactis douglasii var. douglasii David D. Keck and J. Clausen 1935-6-25 3755 Lassen just w of town Susanville 1300 Comment
  SEINET7450277 Image available Chaenactis nevadensis D. W. Kyhos 1967-9-1 67 -87 Lassen Within 1/2 mile north of Hat Lake Comment
  NY1001400  Chamaesyce maculata G. Schoolcraft 1998-9-17 2810 Lassen Susanville BLM office 1268 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
  CHSC117544  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Dittes 2016-7-13 21130 A Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC58840  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1992-7-16 5114 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. Beds of creek and reservoir. 1691 Comment
  JEPS121298  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart 2013-7-22 18847 Lassen W margin of duck field, about 30 yards S of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS52357  Chamaesyce serpyllifolia Brown and Wieslander 1922-7-7 90 Lassen Eagle Lake, Martin Springs Comment
  JEPS128409  Chamerion angustifolium subsp. circumvagum Catherine Bauer with Ellen Bauer Benson 2017-8-16 17 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  RSA756354  Chenopodium Barbara Ertter 1987-7-24 7301 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  JEPS121284  Chenopodium album Lowell Ahart 2013-7-22 18859 Lassen 30 yards S of a man-made pond, about 120 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS97785  Chenopodium chenopodioides Annetta M. Carter 1945-9-30 1726 Lassen Sam Webb place near end of Eagle Lake. 1554 Comment
  CDA23377  Chenopodium hians J. T. Howell 1962-6-19 37889 Lassen 3 miles south of Hallelujah Junction. Comment
  CHSC25311  Chenopodium leptophyllum Pauleen Broyles 1977-6-14 158 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 Comment
  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-BC451322  Chimaphila Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville. Perkin's Ranch 2133 Comment
  CAS-BOT-BC451355  Chimaphila menziesii Clare B. Hardham 1971-8-22 18388 Lassen Diamond Mountain: North slopes 2133 Comment
  UCD149985  Chorispora tenella William Anderson 1963-5-7 s.n. Lassen Milford. Comment
  CAS-BOT-BC247863  Chorizanthe watsonii Clare B. Hardham 1961-6-17 7499 Lassen Baxter Cr. south of Susanville 1524 Comment
  CAS-BOT-BC36276  Chrysolepis sempervirens Cain C. Brighton 1925-8-24 95 Lassen Mt. Lassen Volcanic National Park, 1 mi below Drakesbad 1645 Comment
  SEINET10730905  Chrysolepis sempervirens Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 841 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
  CAS-BOT-BC140659  Chrysothamnus humilis John Thomas Howell 1974-7-9 50485 Lassen SW of Wildcat Point, Eagle Lake 1554 Comment
  JEPS21420  Chrysothamnus viscidiflorus subsp. viscidiflorus R. F. Hoover 1940-9-29 4644 Lassen pass between Shaffer Mt. and Warren Peak Comment
  OBI5967  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 2396 Lassen Big Valley, 2.6 mi from Bieber on the road to Alturas 1268 Comment
  UC1567437  Chylismia claviformis subsp. cruciformis G. Schoolcraft 1989-5-16 1875 Lassen w Hwy 395 (ca 2 mi s of Karlo turnoff) 1356 Comment
  SEINET5344414  Chylismia claviformis subsp. cruciformis F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  UC1299430  Chylismia claviformis subsp. integrior Freed W. Hoffman 1946-6-8 728 Lassen s end Madeline Plains Comment
  CDA38209  Cicuta douglasii T. C. Fuller 1965-8-26 14041 Lassen North side of old highway to Johnstonville, 5 miles east of Susanville. 0 Comment
  CAS-BOT-BC285336  Cirsium andersonii Annie M. Alexander; Louise Kellogg 1946-8-13 5156 Lassen West side of Eagle Lake Comment
  NY409534  Cirsium arvense G. Schoolcraft 1988-8-10 1847 Lassen In Willow Creek Valley along Hwy. 139. 149.4 Comment
  CDA1167  Cirsium cymosum T. C. Fuller 1959-7-7 2763 Lassen Hwy 395; 1 mile north of Ravendale. 0 Comment
  CDA1174  Cirsium cymosum G. D. Barbe 1982-7-13 3882 Lassen Madeline Plain Scattered along Westside Rd. at base of Dry Valley Ridge, 3 mi. n. of Termo- Grasshopper Rd. 0 Comment
  CAS-BOT-BC278004  Cirsium cymosum T. C. Fuller 1959-7-7 2740 Lassen Hwy. 395, 7 miles north/road to Karlo Comment
  JEPS59279  Cirsium occidentale var. californicum W. L. Jepson 1918-8-4 7807 Lassen Horse Lake 1554 Comment
  CDA1525  Cirsium ochrocentrum T. C. Fuller 1980-8-5 20311 Lassen 28 km NE of Ravendale; east shore of Dodge Reservoir, 0.4 km east of campground. Comment
  CAS-BOT-BC280422  Cirsium ochrocentrum Lee Wheeler 1950-10-1 s.n. Lassen Clarence Hoffman Ranch Comment
  CAS-BOT-BC280425  Cirsium ochrocentrum Lee E. Wheeler 1959-7-23 s.n. Lassen M. A. Mallory prop. Richmond Rd., ca. 4 mi SE/Susanville Comment
  CAS-BOT-BC280428  Cirsium ochrocentrum T. C. Fuller 1959-7-7 2737 Lassen M. A. Mallory ranch, Richmond Road, ca. 4 mi. SE/Susanville Comment
  CDA1522  Cirsium ochrocentrum var. ochrocentrum Lee Wheeler, T. C. Fuller 1518-58 1958-11-12 s.n. Lassen Honey Lake M. Mallery (Mallory) ranch, Susanville. (4 mi SE of Susanville). 0 Comment
  CDA20242  Cirsium undulatum G. D. Barbe 1984-8-2 4186 Lassen Madeline Plains; Just e of Westside Rd, 3 mi no f Termo-Grasshopper Rd., Madeline Plains, along e base of Dry Valley Ridge. 1615 Comment
  RSA286400  Cirsium undulatum T. C. Fuller 1980-8-5 20311 Lassen North side of road to campground, east shore of Dodge Reservoir, 28 km (17.5 miles) northeast of Ravendale Comment
  POM260406  Clarkia lassenensis C. L. Hitchcock 1940-5-26 6610 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CAS-BOT-BC164866  Clarkia rhomboidea Louella Bass 1973-5-29 EV 63 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC164869  Clarkia rhomboidea Clare B. Hardham 1961-6-16 7447 Lassen S. of Susanville Comment
  CHSC4775  Clarkia rhomboidea R. Carter 1967-6-27 564 Lassen Ca. 10 yds off S side of Rd. Comment
  CHSC59759  Clarkia rhomboidea Mary Meyer 1980-8-5 Lassen 2148 Comment
  RSA122142  Clarkia rhomboidea L. R. Short, Wm. Gansberg 1936-7-3 S- 358 Lassen MDM. Burgess Spr. Exp. Range. Lassen National Forest 1848 Comment
  UC1137738  Clarkia rhomboidea George A. Fischer, Irwin H. Johnson 1933-7-14 F 246 Lassen Lassen National Forest 1767 Comment
  UC1587045  Clarkia rhomboidea G. Schoolcraft 1991-7-30 2194 Lassen e side Widow Mountain 1889 Comment
  UC773908  Clarkia rhomboidea L. R. Short and Wm. Gansberg 1936-7-3 S- 358 Lassen Burgess Spring Experiment Range Lassen Forest 1847 Comment
  CHSC36439  Clarkia stellata Dave Leuck 1981-6-16 20 Lassen Subway Cave on Hwy 44. Comment
  CHSC61223  Clarkia stellata P. V. Caldwell 1972-6-15 225 Lassen Eagle Lake: W face on Black Mtn. 1706 Comment
  CHSC80231  Clarkia stellata Jeanne Boze 1981-6-12 108 Lassen On hillside along road to 5 corners about 3 mi from Eagle Lake Field Station. 1706 Comment
  HSC63829  Clarkia stellata Teresa Prendusi 1980-7-1 Lassen McCoy Flat, 5 mi. E of northern tip of Eagle Lake 1646 Comment
  CHSC64847  Claytonia rubra subsp. depressa Vernon H. Oswald 1995-6-26 6940 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
  CHSC80559  Claytonia rubra subsp. depressa Vernon H. Oswald 2001-5-4 9998 Lassen Ash Creek Wildlife Area, Wayman Barn at the west end of Hunt Rd. 1267 Comment
  POM102012  Claytonia rubra subsp. rubra Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  UC1136745  Claytonia rubra subsp. rubra A. Simontacchi 1940-5-13 700 Lassen 7.8 mi wsw Cone Ranch Heights; Lassen National Forest, Halls Flat Quad. 1920 Comment
  UC1136873  Claytonia rubra subsp. rubra L. R. Short and Wm. Gansberg 1936-6-2 S- 359 Lassen Burgess Spring Experimental Range; Lassen Forest 1865 Comment
  JEPS94360  Cleome platycarpa Vernon H. Oswald and Lowell Ahart 1997-5-7 8403 Lassen Smoke Creek Ranch Road 3.4 mi w of California-Nevada State Line; Smoke Creek Ranch Road 1420 Comment
  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
  SEINET8584734  Cleomella hillmanii var. hillmanii W. Harnach 2010-6-1 1241 Lassen Approx 10 miles NE of Doyle on Fort Sage Road then 1.9 miles N on Cal-Neva Road. Honey Lake Valley. Comment
  NY242421  Cleomella parviflora A. Tiehm 1980-5-29 5748 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles NNW of Wendel. 1231.4 Comment
  CHSC23569  Collinsia parviflora W. O. Baum 1971-7-6 38 Lassen E slope of Gallatin Peak. 1950 Comment
  JEPS107462  Collinsia parviflora Lowell Ahart, John Dittes 2005-6-1 11858 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS17625  Collinsia parviflora Rimo Bacigalupi with G. Thomas Robbins 1955-7-19 5375 Lassen 2 mi w Ash Valley (along rd from Adin to Madeleine, in rd fill) 1371 Comment
  SEINET10315318 Image available Collinsia parviflora Jeffrey Huber 1971-6-2 127 Lassen Approximately 30 miles north of Susanville, on California Hwy 139 1646 Comment
  SEINET10548296  Collinsia parviflora Mary Susan Taylor 1974-5-4 Taylor 225 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
  UC1143017  Collinsia torreyi var. latifolia August L. Hormay 1934-6-30 Lassen Lassen National Forest, Harvey Mountain Harvey Mountain; Lassen National Forest, Harvey Mountain 2133 Comment
  POM75605  Collomia grandiflora Marcus E. Jones 1897-6-26 10168 Lassen Susanville, Perkin's Ranch. 1463 Comment
  SBBG58193  Collomia grandiflora E. Rockwell -Jun-1925 802 Lassen Eagle Lake 1554 Comment
  UC1537483  Collomia grandiflora Gordon H. True Jr. 1938-7-9 906 Lassen near Horse Lake 1524 Comment
  UC1981729  Collomia linearis Debra Valov 2010-7-17 2010102 Lassen Bieber, Lassen Co., CA;; off County Rs A2 c. 8.7 km east of Hwy 299. Comment
  CHSC5005  Collomia tinctoria K. C. Newman 1967-7-2 59 Lassen Collected about 50 yds. NE of ELBS just beyond the men's dorm. 1554 Comment
  CHSC60835  Collomia tinctoria Vernon H. Oswald; Lowell Ahart 1993-6-28 5597 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, between Grays Valley and Harvey Valley, E of Poison Lake. Along the edge of the road. 1734 Comment
  RSA712891  Collomia tinctoria L. P. Janeway 2005-6-3 8450 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. Comment
  RSA712933  Collomia tinctoria L. P. Janeway 2005-7-4 8468 Lassen Ridge top north above Long Valley; 0.4 km west of Road 34N41. High Cascade Range. 1752 Comment
  RSA128290  Collomia tinctoria P. H. Raven, Otto T. Solbrig 1958-6-16 13255 Lassen Along State Highway 36, 0.9 miles east of summit of Fredonyer Pass Comment
  HSC95148  Comarum palustre Gordon Leppig 1998-7-12 934 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95339  Comarum palustre Gordon Leppig, J. Cromwell 1997-7-27 607 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CHSC7713  Convolvulus arvensis Beverley J. Wise 1969-6-4 33 Lassen 10 mi. east of Susanville on Hwy 395 (Janesville). 1310 Comment
  HSC23535  Convolvulus arvensis L. G. Bennett 1967-7-17 180 Lassen Murrers Meadow, near Eagle Lake 1494 Comment
  CAS-BOT-BC286116  Conyza canadensis John Thomas Howell 1974-7-8 50503 Lassen Susanville 1295 Comment
  CHSC6277  Corallorhiza maculata A. Santos 1946-7-11 Lassen Silver Lake. 1981 Comment
  JEPS17408  Cordylanthus kingii subsp. helleri Rimo Bacigalupi with G. T. Robbins 1955-7-21 5427 Lassen s Smoke Creek Ranch Rd. (1.3 mi w of Nevada Line, 17.5 mi e of US Hwy 395); draingage of Rush Creek 1341 Comment
  JEPS74320  Cordylanthus tenuis subsp. tenuis John Thomas Howell and Gordon H. True 1973-7-31 50019 Lassen on road from Janesville to Thompson Peak; Sierra Nevada, Diamond Range 1737 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
  CAS-BOT-BC290390  Crepis acuminata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49462 Lassen Elysian Valley, west of Janesville 1325 Comment
  UC1136840  Crepis acuminata L. R. Short 1936-7-9 S- 509 Lassen Burgess Spr. Exp. Range Lassen National Forest 1818 Comment
  UC581255  Crepis acuminata E. B. Babcock and G. L. Stebbins Jr. 1936-6-8 1776 Lassen 4 mi s Ravendale (n end of valley); Secret Valley 1371 Comment
  POM260004  Crepis acuminata C. L. Hitchcock 1940-5-26 6621 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CHSC27597  Crepis bakeri N. E. Heiken 1978-6-28 58 Lassen E of Eagle L., at Lower Dry L. 1645 Comment
  UC581278  Crepis bakeri subsp. cusickii G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2331 Lassen valley flat along road halfway between Bogard Ranger Station and Harney Valley 1630 Comment
  SEINET10474584  Crepis bakeri subsp. cusickii Mary Susan Taylor 1982-5-29 Taylor 4562 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  CHSC93561  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
  UC76004  Crepis monticola Milo S. Baker July, 1894 Lassen near Bieber; Big Valley, Vicker's Ranch Comment
  UC1368788  Crepis occidentalis John L. Strother 1970-5-23 955 Lassen about 6 mi n Honey Lake 1280 Comment
  UC581194  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2303 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  UC581267  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2304 Lassen w Milford (crest of range head of ridge); Stony Ridge 1930 Comment
  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
  JEPS117488  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
  JEPS107791  Crepis pleurocarpa Lowell Ahart, John Dittes 2005-6-2 11934 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction 1498 Comment
  UC296046  Crepis pleurocarpa E. B. Babcock and J. L. Collins 1926-7-21 89 Lassen 8 mi w Susanville (on hwy to Quincy) 1371 Comment
  HSC63831  Crypsis vaginiflora Teresa Prendusi 1980-8-27 Lassen Reservoir just NE of Susanville 1280 Comment
  RSA233758  Crypsis vaginiflora R. F. Thorne, C. W. Tilforth 1969-9-6 39255 Lassen along Long Valley Creek, c. 14 mi. SE of Milford. 1311 Comment
  UC1537698  Cryptantha Gordon H. True Jr. 1938-7-9 909 Lassen near Termo 1524 Comment
  UC1561921  Cryptantha ambigua Barbara Ertter with Gary Schoolcraft 1987-6-16 7199 Lassen on ne side Honey Lake (saddle on e side of Hot Springs Peak); Skeedaddle Mountains 2194 Comment
  UCD119054  Cryptantha ambigua Robbins; Raynor 1943-6-1 s.n. Lassen Madeline. Comment
  CHSC106681  Cryptantha circumscissa B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  POM368344  Cryptantha circumscissa Christopher Davidson 1975-6-7 2761 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  CAS-BOT-BC189458  Cryptantha circumscissa var. circumscissa Alice Eastwood; John Thomas Howell 1940-6-16 8333 Lassen Near Susanville Comment
  UC1924241  Cryptantha echinella Debra Valov 2004-6-8 2004243 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC91303  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
  UC79293  Cryptantha simulans T. S. Brandegee 1892-6-26 Lassen Milford Comment
  JEPS90097  Cryptantha torreyana Dean Wm. Taylor with Robert A. Price 1988-6-4 9775 Lassen ca. 6 mi. e. MacArthur (along Hwy. 299 at crossing of Frazer Creek); Pit R. watershed, Fall R. Valley 1036 Comment
  POM72228  Cryptantha torreyana Marcus E. Jones 1897-6-19 6862 Lassen Chat 1616 Comment
  POM72585  Cryptantha torreyana Marcus E. Jones 1897-6-25 7102 Lassen Susanville. 1341 Comment
  UC1037251  Cryptantha torreyana Leo Whitney 1934-7-5 1787 Lassen ca 14 mi w Eagle Lake (near Harvey Valley Spring); Lassen National Forest, Harvey Valley 1737 Comment
  UC526168  Cryptantha torreyana John Thomas Howell 1934-7-10 12546 Lassen Long's Well Comment
  UC1584020  Cryptantha watsonii G. Schoolcraft 1990-6-12 2089 Lassen about 17 mi e Ravendale (in Pine Dunes RNA) 1706 Comment
  POM197158  Cryptogramma acrostichoides Anonymous 1881-07 s.n. Lassen Mount Lassen Comment
  CHSC59701  Cusickiella douglasii Mary Meyer 1980-7-15 Lassen 1546 Comment
  NY125657  Cusickiella douglasii G. Schoolcraft 1988-6-7 1809 Lassen About 14 miles NE of Ravendale, CA 1737.4 Comment
  NY704022  Cusickiella douglasii N. H. Holmgren 1978-6-11 8926 Lassen Upper Smoke Creek, southeast side of Observation Peak, 11.3 km (7 mi) northeast of Rye Patch Canyon summit, 21 km (13 mi) air distance east-southeast of Ravendale 1700 Comment
  POM180742  Cycladenia humilis A. W. Kramer s.n. Lassen Prospect Peak, Lassen National Park Comment
  CHSC60296  Cymopterus terebinthinus var. californicus Mary Ann Showers 1992-6-13 2560 Lassen Lassen Volcanic National Park. Volcanic outcrops southwest of Widow Lake. 2072 Comment
  CHSC117528  Cyperus squarrosus Lowell Ahart; John Dittes 2016-7-13 21139 Lassen Scattered along the south edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC60861  Cyperus squarrosus Vernon H. Oswald; Lowell Ahart 1993-6-28 5624 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. On the bed of a small branch of Pine Creek 1737 Comment
  JEPS28326  Cyperus squarrosus George W. Gillett 1957-9-4 1125 Lassen e. margin of lower lake Widow Lake (near inlet); Lassen Volcanic Nat'l Park 2072 Comment
  UC569547  Cyperus squarrosus H. S. Yates 1936-8-11 6065 Lassen Baxter Creek Susanville Quad., Baxter Creek 1280 Comment
  SEINET7725892  Cypripedium californicum Unknown Lassen Mt. Dyer 1829 Comment
  CAS-BOT-BC70564  Cystopteris fragilis Louella Bass 1973-6-18 EU- 126 Lassen Elysian Valley 1325 Comment
  CHSC117185  Cystopteris fragilis Lowell Ahart; John Dittes 2016-6-7 21007 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC27716  Cystopteris fragilis Robert A. Schlising 1978-7-9 3315 Lassen S of Eagle Lake, rocks on E side of Mahogany L. 2060 Comment
  CHSC7699  Dactylis glomerata Beverley J. Wise 1969-5-23 128 Lassen 35.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  RSA324194  Dalea ornata A. Tiehm, Raymond Evans, James Young 1984-6-7 8592 Lassen Flats n the northwest side of Shaffer Mountain. 7.5 airmiles NNW of Litchfield. 1372 Comment
  CHSC117527  Damasonium californicum Lowell Ahart; John Dittes 2016-7-13 21138 Lassen South edge of the dirt dam, 50 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  HSC30066  Damasonium californicum D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19182 Lassen Harvey Valley near Cone Springs Comment
  UC1137760  Damasonium californicum August L. Hormay 1934-5-14 Lassen Poison Lake Lassen Nat'l Forest, Poison Lake 1706 Comment
  UC1024914  Danthonia californica Leo Whitney 1935-6-25 3368 Lassen near Camp 10 <of?> Fruit Grower's Supply Company; Lassen National Forest Comment
  UCD60727  Danthonia californica var. americana F. C. Raney 1966-6-25 s. n. Lassen Harvey Valley, Lassen National Forest. Comment
  UCD61347  Danthonia unispicata L. Whitney 1935-6-24 Lassen Squaw Valley. Comment
  UC1523708  Deinandra lobbii Gary Schoolcraft 1981-8-25 567 Lassen e Little Valley (at edge of reservoir in flat); Chico Flat 1377 Comment
  HSC41628  Deinandra lobbii Barbara Kelly 1977-8-10 581 Lassen Along Adin Susanville Road, mileage marker 23.0, S of Adin Comment
  CHSC64806  Delphinium andersonii Vernon H. Oswald 1995-5-24 6784 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) at milepost 18.5, ca. 1 mi e of Duck Lake Rd. On the s side of the road. 1219 Comment
  POM253334  Delphinium andersonii A. A. Heller 1938-6-23 15217 Lassen Along Hwy 395, between Termo and Madeline. 1524 Comment
  UC1136878  Delphinium andersonii L. R. Short 1936-5-12 S- 347 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1834 Comment
  UC1583981  Delphinium andersonii G. Schoolcraft 1990-6-12 2090 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC1924575  Delphinium andersonii Debra Valov 2006-5-29 2006026 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1275 Comment
  UC619271  Delphinium andersonii J. and H. W. Grinnell 1938-6-13 1098 Lassen sage flat near Ravensdale 1554 Comment
  CHSC36468  Delphinium nudicaule Jeffrey R. Peek 1982-6-3 29 Lassen Ca. .3 mi s jct of forest service roads 5.16 and 5.17, heading toward 5-corners. Comment
  JEPS6109  Delphinium nudicaule A. A. Heller 1938-6-4 15149 Lassen E of Fredonyer Pass, Lassen Co. Comment
  CAS-BOT-BC116045  Delphinium nuttallianum Doris Kildale Gillespie 1930-5-14 9380 Lassen Fredonia Pass near Susanville. Comment
  CAS-BOT-BC116054  Delphinium nuttallianum Elmer Ivan Applegate 1929-6-21 5780 Lassen Kelley's Camp, Warner Valley, Mt. Lassen region Comment
  CHSC4927  Delphinium nuttallianum L. G. Bennett 1967-6-23 15 Lassen Immediate vicinity of Eagle Lake Biological Station, Eagle Lake. 1554 Comment
  UC1131416  Deschampsia cespitosa H. S. Yates 1936-8-12 6087 Lassen Westwood Susanville Quad., Westwood 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
  JEPS122164  Deschampsia cespitosa subsp. cespitosa Lowell Ahart 2014-8-20 19719 Lassen 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. Comment
  RSA126933  Deschampsia cespitosa subsp. cespitosa G. A. Fischer, I. H. Johnson 1933-7-14 F- 244 Lassen Patterson Flat 1738 Comment
  CAS-BOT-BC192739  Deschampsia danthonioides John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50650 Lassen South and southeast of Diamond Mt. 2286 Comment
  POM114878  Deschampsia danthonioides Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC1024884  Deschampsia danthonioides Leo Whitney 1935-5-26 3137 Lassen 10 mi. e. Adin (Ash Creek); Ash Creek Comment
  UC1024890  Deschampsia danthonioides Leo Whitney 1935-5-27 3124 Lassen Bieber 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-BC201813  Deschampsia elongata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49467 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC201882  Deschampsia elongata George W. Gillett 1957-7-28 935 Lassen Banks of Widow Lake 2072 Comment
  UC1100290  Deschampsia elongata Malcolm A. Nobs and S. Galen Smith 1949-7-21 1058 Lassen 4 mi. n. Madeline Comment
  CAS-BOT-BC201808  Deschampsia elongata Malcom A. Nobs; S. Galen Smith 1949-7-21 1058 Lassen 4 miles north of Madeline Comment
  SEINET10480673  Descurainia Mary Susan Taylor 1982-5-29 Taylor 4564 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  CHSC60884  Descurainia incisa subsp. filipes Vernon H. Oswald; Lowell Ahart 1993-7-8 5656 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. Along a ridge between the railroad and the lake. 1709 Comment
  CAS-BOT-BC43090  Descurainia nelsonii John Thomas Howell 1934-7-7 12476 Lassen Harvey Valley. Comment
  CHSC4784  Descurainia pinnata R. Carter 1967-7-7 578 Lassen Collected outside cafeteria, N side, 15 yds. from building. Eagle Lake Biology Station. Comment
  JEPS108556  Descurainia pinnata subsp. halictorum L. P. Janeway 2005-7-4 8466 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  CHSC64772  Descurainia pinnata subsp. intermedia Vernon H. Oswald 1995-5-24 6777 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
  UC1143009  Descurainia richardsonii August L. Hormay 1934-5-11 Lassen 2.5 mi nw Hall's Flat; Lassen National Forest 1676 Comment
  CHSC57356  Descurainia sophia B. G. Clark 1987-4-15 22 Lassen Lassen or Inyo counties. Top of knoll 1/4 mi sw of Lassen College adjacent and west of hwy 139. Comment
  CAS-BOT-BC500986  Dichelostemma multiflorum H. D. Ripley; R. C. Barneby 1943-6-14 5750 Lassen West of Susanville 1310 Comment
  CHSC64867  Dieteria canescens var. shastensis Vernon H. Oswald 1995-6-26 6937 Lassen Modoc Plateau. Gravel pit on the e side of Ash Valley Rd. (Lassen 527) 0.2 mi n of Spooner Rd. in Ash Valley. 1542 Comment
  CAS-BOT-BC153675  Diplacus mephiticus M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  CAS-BOT-BC153678  Diplacus mephiticus A. A. Heller; P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat Comment
  CHSC36479  Diplacus mephiticus Margaret E. Halloran 1982-6-6 10 Lassen Pine Creek just below fish trap where Pine Creek empties into Eagle lake. Comment
  CHSC4812  Diplacus mephiticus R. Carter 1967-7-7 577 Lassen Collected outside dining hall, n side, 15 yds from building. 1524 Comment
  SEINET13714183  Diplacus mephiticus M. J. Williams 1974-7-26 74 -L-35 Lassen S of Hwy 70, 2 miles W of Hallelujah Junction. 1494 Comment
  CAS-BOT-BC151434  Diplacus nanus Louella Bass 1977-6-12 77 -1&2 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC154007  Diplacus torreyi A. M. Vollmer; L. Beane 1953-7-1 48 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  SEINET8205956  Diplacus viscidus R. Carter 1967-7-7 577 Lassen collected outside dining hall; Eagle Lake Biology Station, E central shore. 1524 Comment
  CAS-BOT-BC208726  Distichlis spicata Malcom A. Nobs; S. Galen Smith 1949-7-22 1069 Lassen Northeast shore of Eagle Lake on drying shore. Comment
  HSC9639  Distichlis spicata M. T. Milligan 1964-8-6 199 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  RSA647540  Distichlis spicata Marion P. Harthill 1972-6-17 798 Lassen Standish. Comment
  UC1533158  Distichlis spicata G. Schoolcraft 1986-9-10 1675 Lassen Along N shore of Eagle Lake 1554 Comment
  UCD64387  Distichlis spicata A. A. Beetle 1941-6-28 2807 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  UCD64451  Distichlis spicata H. S. Yates 1936-8-11 6056 Lassen Near Red Rock. 1341 Comment
  CHSC7735  Dodecatheon alpinum Beverley J. Wise 1969-4-20 82 Lassen 14.7 mi. north of Susanville on Hwy 139. 1463 Comment
  HSC17852  Dodecatheon alpinum M. T. Milligan 1964-7-16 135 Lassen 2 mi. N on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  HSC95203  Dodecatheon alpinum Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-28 507 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1553397  Dodecatheon conjugens G. Schoolcraft 1988-4-25 1783 Lassen Ash Valley RNA/ACEC 16 mi e Adin; Ash Valley RNA/ACEC e of Adin 1554 Comment
  UC1609465  Dodecatheon conjugens Vernon H. Oswald and Lowell Ahart 1993-5-12 5381 Lassen Forest Rd. 32N08 to Crater Lake 0.5 mi ne Hwy 44 (between A21 (to Westwood) and Poison Lake, edge of meadowy opening along creek); Pine Creek 1737 Comment
  UC559941  Dodecatheon conjugens Leo Whitney 1935-6-10 3211 Lassen Camp 10 Fruit Growers Supply Company Camp 10, Fruit Growers Supply Company Comment
  CHSC6234  Dodecatheon jeffreyi M. West 1946-6-20 Lassen Meadow above Grasshopper Valley. 1828 Comment
  HSC17905  Dodecatheon subalpinum W. F. Nickel 1965-4-11 Lassen About 100 yds. W of Paynes Creek on Hwy. 36 Comment
Read comments
Jun 27 2013
  JEPS21587  Downingia bacigalupii Calvin McMillan 1949-6-15 1543 Lassen w of Bieber (nw Lassen County (corner)) Comment
  UC1143165  Downingia bacigalupii A. Simontacchi 1940-6-16 874 Lassen 6.4 mi wnw Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1767 Comment
  JEPS108450  Downingia bacigalupii Lisa Schultheis 1995-6-27 227 -95 Lassen About 3.5 mi S of Madeline, W side of Hwy 395. 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
  CHSC30606  Downingia bicornuta T. M. Lane 1975-6-23 28 Lassen 50 m n of spring headwaters of Willow Cr; 3.2 km ese of Eagle Lake Field Station; 22.4 km n of Susanville. 1589 Comment
  RSA0035911  Downingia bicornuta var. bicornuta Lowell A. Ahart, John Dittes 2008-6-20 14945 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
  CHSC54182  Downingia cuspidata Vernon H. Oswald 1991-5-28 4623 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  SEINET12329657  Downingia elegans N. H. Holmgren, Holmgren, P. K. 1978-1 8902 Lassen Madeline Plains, Coyote flat, 14.5 km (9 mi.) east-northeast of Termo and 13 km (8 mi.) airline 1630 Comment
  UC1188739  Downingia insignis John H. Weiler, L. Constance, and E. Molseed 1960-6-13 60163 Lassen 1.7 mi s Ravendale (w side of U.S. Highway 395) Comment
  UC1520665  Downingia insignis Noel H. Holmgren and Patricia K. Holmgren 1978-6-10 8902 Lassen 9 mi ene (8 mi air distance) Termo; Madeline Plains, Coyote Flat 1630 Comment
  UC614648  Downingia insignis L. Constance 1938-6-11 2328 Lassen Litchfield, overflow of the Susan River Susan River 1219 Comment
  RSA39757  Downingia laeta P. A. Munz 1947-5-20 11892 Lassen Milford 1265 Comment
  SEINET8039620  Downingia laeta G. Schoolcraft 1995-6-6 2493 Lassen Laver Spring. 1585 Comment
  CAS-BOT-BC41952  Draba albertina John Thomas Howell 1934-6-30 12132 Lassen Warner Mountains. Near Lost Lake. 2438 Comment
  JEPS94484  Draba verna Vernon H. Oswald and Lowell Ahart 1997-5-27 8522 Lassen 3.6 mi ne of Highway 139 (small impoundment on Coyote Flat Draw crossing Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat); Coyote Flat Draw crossing Forest Route 38N04 1731 Comment
  CHSC61140  Draba verna var. aestivalis Vernon H. Oswald; Lowell Ahart 1993-5-12 5391 Lassen Butte Lake Rd., 1.4 mi S of Hwy. 44, between Old Station and Poison Lake. Along the road. 1652 Comment
  CHSC69125  Drosera anglica Vernon Oswald; Beth Corbin, Gary Schoolcraft 1997-8-5 8812 Lassen North slope of Robbers Creek at Robbers Spring, so ... Field redacted by CHSC, contact the data manager for more information 1798 Comment
  SEINET11910532  Drymocallis glandulosa Unknown 1978-1 11 Lassen E side of Mahogany L., S of Eagle L. 2060 Comment
  CHSC116199  Elatine californica Lowell Ahart; John Dittes 2015-7-13 20301 Lassen About 400 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC60975  Elatine chilensis Lowell Ahart 1993-5-17 6954 Lassen On the west side of Dunstone Road, about 1-1/2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. Comment
  JEPS28330  Eleocharis acicularis George W. Gillett 1957-7-29 952 Lassen Snag Lake, shoreline near the E inlet Lassen Volcanic National Park 1850 Comment
  JEPS87445  Eleocharis bella Vernon H. Oswald and Lowell Ahart 1993-6-28 5599 Lassen n.e. Poison Lake (n. of Hwy. 44 at n.w. edge of Harvey Valley, Rd. 35N04 at Aspen Well); Harvey Valley, Aspen Well 1725 Comment
  UC1818  Eleocharis macrostachya J. Burtt Davy Jun 17-24 1897 3287 Lassen Honey Lake Valley, W end of lake Comment
  UCD55301  Eleocharis macrostachya Ellen Dean; Gary Schoolcraft 2006-5-16 3130 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1251 Comment
  CAS-BOT-BC112848  Eleocharis macrostachya R. K. Gierisch 1968-7-12 3359 Lassen Hwy 36, 1 mi E of Fredonyer Pass. 1706 Comment
  CHSC117286  Eleocharis palustris Lowell Ahart; John Dittes 2016-7-15 21215 Lassen About 300b yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) mortheast of Bieber, Big Valley. 1261 Comment
  UC1142940  Eleocharis palustris A. L. Hormay 1941-6-18 2 Lassen Little Harvey Valley 1676 Comment
  CHSC96717  Elodea nuttallii Gordon Leppig 1998-7-13 970 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. Submersed near creek. 1970 Comment
  UC1100132  Elodea nuttallii Herbert L. Mason and Verne Grant 1947-7-9 13292 Lassen 5 miles east of Bieber Comment
  POM112303  Elymus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  CAS-BOT-BC227484  Elymus elymoides John Thomas Howell 1976-7-20 52000 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  UCR7841  Elymus elymoides Marilyn Malin 1968-6-21 248 Lassen Along roadside, near tree blazed to indicate path to the ice caves on the west side of Eagle Lake Comment
  SEINET10527893  Elymus elymoides Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2581 Lassen 6 mi S of Adin, alond Calif. hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  CHSC13858  Elymus elymoides subsp. elymoides George Ellmore 1973-6-25 735 Lassen 10 m. from water on west side of Pelican Point on West Eagle Lake. 1560 Comment
  CHSC5256  Elymus elymoides subsp. elymoides P. Balch 1955-7-23 Lassen Stafford's Eagle Lake Resort. 1569 Comment
  UC1024958  Elymus elymoides subsp. elymoides Leo Whitney 1935-6-24 3304 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC53733  Elymus elymoides subsp. elymoides J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley 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
  UCD62571  Elymus repens Beecher Crampton 1954-7-5 2059 Lassen Hwy 36, 4.5 miles west of Susanville. Comment
  UC506972  Elymus trachycaulus George A. Fischer and Irwin H. Johnson 1933-7-12 F- 230 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  UCD32662  Elymus trachycaulus Beecher Crampton 1954-7-5 2058 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD62709  Elymus trachycaulus Beecher Crampton 1954-7-5 2058 Lassen Along Hwy. 36, 4.5 miles west of Susanville. 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
  HSC69080  Elymus trachycaulus subsp. trachycaulus Gary Schoolcraft 1980-7-28 333 Lassen Meadow E of Tule Mountain. 2043 Comment
  CHSC76104  Elytrigia elongata Lowell Ahart; Vernon H. Oswald 1999-9-13 8212 Lassen On the edge of a canal, just south of the parking area and about 100 yards to the east, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  POM119924  Ephedra californica Marcus E. Jones 1897-6-23 s.n. Lassen Amedee 1220 Comment
  CHSC106080  Epilobium brachycarpum Lowell Ahart; John Dittes 2010-7-31 17005 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  SEINET12539614  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  SEINET12539665  Epilobium brachycarpum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  UC1537612  Epilobium brachycarpum Gordon H. True Jr. 1936-6-26 550 Lassen head of creek 2 mi e Eagle Lake; Willow Creek 1584 Comment
  NY1001463  Epilobium ciliatum var. ciliatum G. Schoolcraft 1990-7-11 2108 Lassen McKabe Spring north of Moon Lake 1669 Comment
  JEPS117486  Epilobium densiflorum Lowell Ahart, John Dittes 2010-7-31 16994 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  CHSC59090  Epilobium glaberrimum subsp. glaberrimum Vernon H. Oswald; Lowell Ahart 1992-8-25 5183 Lassen Lassen Volcanic National Park. Grassy Creek at the S end of Snag Lake. Bottom of a cutbank of the creek where it enters the lake. 1853 Comment
  UC725478  Epilobium pallidum A. A. Heller 1938-7-28 15295 Lassen meadow edge of a swamp about 2 mi e Westwood 1524 Comment
  UC726203  Epilobium pallidum A. A. Heller 1941-6-26 16233 Lassen on ridge w Nieubieber Comment
  HSC95344  Epilobium palustre Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 538 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC12451  Equisetum arvense Robert W. Severin 1969-6-26 41 Lassen 7.2 mi along road from E. L. B. S. to Galatin Beach, 3 mi s of E. L. B. S. 1645 Comment
  CAS-BOT-BC57302  Equisetum laevigatum John Thomas Howell 1975-7-23 51386 Lassen Susanville 1295 Comment
  CAS-BOT-BC57305  Equisetum laevigatum Clare B. Hardham 1969-8-28 17458 Lassen west of Janesville Comment
  CAS-BOT-BC213624  Eragrostis mexicana subsp. virescens John Thomas Howell 1976-7-19 51943 Lassen Susanville 1296 Comment
  CAS-BOT-BC174189  Eremogone congesta var. congesta Mrs. R. M. Austin; Mrs. Bruce 1898-6-1 2156 Lassen [Madaline] Madeline Plains Comment
  CAS-BOT-BC174200  Eremogone congesta var. congesta David D. Keck; J. Clausen 1935-6-24 3746 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC89740  Eremogone congesta var. congesta L. P. Janeway 2004-6-26 8141 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18. 1714 Comment
  CHSC91525  Eremogone congesta var. congesta L. P. Janeway 2005-7-3 8457 Lassen High Cascade Range. Near large shallow stock pond 0.3 km west of Road 35N38 (road to Blacks Ridge Lookout Tower), 1.9 road km south or Road 22; 2.3 air km northwest of the lookout. 1580 Comment
  CHSC29857  Eremogone congesta var. simulans Robin Ondricek 1978-6-6 32 Lassen At Murrers Upper Meadow, .5 mi E of intersection with main rd. to ELFS and tunnel crossing. 1569 Comment
  SEINET12875575 Image available Eremogone congesta var. subcongesta John Thomas Howell 1977-1 52401 Lassen North end of Eagle Lake 1585 Comment
  SEINET8821547  Eremogone congesta var. subcongesta G. Schoolcraft 1998-6-30 2746 Lassen N end of Fort Sage Mountains. 1859 Comment
  CHSC91922  Eremogone congesta var. suffrutescens L. P. Janeway; B. Castro 2005-7-10 8476 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. 1859 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
  CHSC64796  Eremothera minor Vernon H. Oswald 1995-5-24 6766 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 5.0 mi e of Amedee Rd. at Wendel. On flat bordering the road. 1219 Comment
  CHSC5079  Eriastrum signatum A. W. Harvilik 1967-6-30 35 Lassen Collected near junction of rd. 5.19 and rd to Murrer's Meadow. 1524 Comment
  UC23545  Eriastrum signatum J. Burtt Davy Jun 17 1897-Jun 24 1897 3408 Lassen Amedee Honey Lake Valley Comment
  UC133906  Eriastrum sparsiflorum Dr. Gustav Eisen July 1891 Lassen Honey Lake Comment
  UC1037321  Ericameria bloomeri Leo Whitney 1934-9-9 1886 Lassen near summit Harvey Mountain; Lassen National Forest, Harvey Mountain 2133 Comment
  UC1136849  Ericameria bloomeri L. R. Short and J. Warren 1936-8-17 S- 497 Lassen Burgess Spr. Exp. Range Lassen Forest 1767 Comment
  UC527343  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-4 Lassen 2.6 mi from Bieber (on the road to Alturas); Big Valley 1267 Comment
  CAS-BOT-BC294183  Ericameria nauseosa var. speciosa Clare B. Hardham 1969-8-28 17426 Lassen West of Janesville Comment
  CHSC66849  Ericameria nauseosa var. speciosa Vernon H. Oswald 1996-10-3 8295 Lassen Modoc Plateau. Hwy. 395 N of Susanville between Litchfield and Ravendale, 10.4 mi N of Smoke Creek Ranch Rd. On the edge of highway at Secret Creek. 1402 Comment
  UC761817  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass betw. Shaffer Mt. and Warren Peak Comment
  UC773959  Ericameria nauseosa var. speciosa L. R. Short 1936-9-14 S- 503 Lassen Burgess Spring Experiment Range Lassen Forest 1761 Comment
  CAS-BOT-BC293206  Ericameria suffruticosa John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50665 Lassen Summit ridge of Diamond Mt. 2346 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
  SEINET10617383  Erigeron aphanactis Jeffrey Huber 1971-6-2 Huber 133 Lassen 6 mi. N of Halleluja Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffrey pine along high ridge and in sandy wash. 1402 Comment
  JEPS97423  Erigeron aphanactis var. aphanactis Vernon H. Oswald and L. Ahart 1995-6-19 6890 Lassen T30N R15E SE1/4 SE1/4 Sect. 12, 4440 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 3.6 mi e of Hwy. 395. Many-stemmed herbaceous perennial from a branching and tap-rooted caudex 1353 Comment
  SEINET10617399  Erigeron bloomeri David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17790 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  CAS-BOT-BC294489  Erigeron bloomeri var. bloomeri Ralph K. Gierisch 1968-7-11 3343 Lassen Lassen National Forest. Harvey Valley 1676 Comment
  CAS-BOT-BC294490  Erigeron bloomeri var. bloomeri David D. Keck; J. Clausen 1935-6-24 3745 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC117134  Erigeron bloomeri var. bloomeri L. P. Janeway; B. Castro 2015-6-5 11777 Lassen Great Basin, Modoc Plateau. Along Tuledad Road (County Road 506) 13.0 road-km south of the junction a the west end of Tuledad Canyon; 6.8 road-km north of Stage Road (which is in the eastern corner of Madeline Plains); west side of a northeasern branch of Red Rock Creek. 1695 Comment
  CHSC117135  Erigeron bloomeri var. bloomeri L. P. Janeway; B. Castro 2015-6-5 11759 Lassen Great Basin, Modoc lateau. 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
  HSC82194  Erigeron bloomeri var. bloomeri Thomas W. Nelson, Jane P. Nelson 1980-7-6 6048 Lassen Along Ash Creek at Ash Creek Campground 1494 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
  JEPS89691  Erigeron bloomeri var. bloomeri Dean W. Taylor 1974-6-14 3719 Lassen Janesville Grade Road at summit 4 mi ssw of Janesville (Plumas National Forest); Northern Sierra Nevada, Plumas National Forest 1706 Comment
  OBI76959  Erigeron bloomeri var. bloomeri Anthony Baniaga 2011-7-6 421 Lassen Lassen Natl Forest. Near intersection of 29N02Y and the "B" spur. Fredonyer Pass quad. T29N r10E sec 23 SW of SW 1640 Comment
  CAS-BOT-BC294486  Erigeron bloomeri var. bloomeri Clarence R. Quick 1964-7-29 64 -90 Lassen Blacks Mt. Experimental Forest 1798 Comment
  CAS-BOT-BC294487  Erigeron bloomeri var. bloomeri Ella Dales Cantelow 1941-5-22 3566 Lassen 2 1/ mi. n. of Secret Valley C.C.C. Camp. U.S. Hy 395 Comment
  CAS-BOT-BC297146  Erigeron concinnus var. concinnus John Thomas Howell 1934-7-6 12439 Lassen Harvey Valley Comment
  CHSC105252  Erigeron divergens Lowell Ahart; John Dittes 2010-7-31 17004 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  JEPS88241  Erigeron divergens Vernon H. Oswald and Lowell Ahart 1996-6-17 7808 Lassen gravel bar on edge of river e Devils Corral Trailhead (Bizz Johnson Trail) (w of 6.0 milepost, trailhead located off of Hwy 36, ca. 7 mi w of Susanville); Modoc Plateau, Susan River 1402 Comment
  SEINET5708466 Image available Erigeron divergens Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7708 Lassen Along CA 139. Willow Creek.; Willow Creek 1428 Comment
  CAS-BOT-BC300371  Erigeron eatonii var. plantagineus B. Bartholomew; B. Anderson 1988-6-25 4374 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  CAS-BOT-BC300373  Erigeron eatonii var. plantagineus Alice Eastwood; John Thomas Howell 1940-6-15 8320 Lassen Said Valley Comment
  HSC28860  Erigeron eatonii var. plantagineus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19253 Lassen Harvey Valley near Cone Springs Comment
  HSC81782  Erigeron eatonii var. plantagineus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6017 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir 1585 Comment
  POM32997  Erigeron eatonii var. plantagineus Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC1118206  Erigeron eatonii var. plantagineus A. Simontacchi 1940-6-4 801 Lassen 7.0 mi sw Jacks Lake; Lassen National Forest, Halls Flat Quadrangle 1828 Comment
  JEPS95131  Erigeron elegantulus Vernon H. Oswald and Lowell Ahart 1997-5-27 8492 Lassen w side of Hwy 139 s of Willow Creek Guard Station 0.9 mi s of Forest Road 38N04 to Coyote Flat Coyote Flat; Hwy 139 1577 Comment
  CAS-BOT-BC295180  Erigeron inornatus Clarence R. Quick 1964-8-5 64 -97 Lassen Cal Mt. east of Poison Lake 1767 Comment
  OBI76966  Erigeron inornatus var. calidipetris Anthony Baniaga 2011-8-3 485 Lassen Lassen Natl Forest.N of 30N61, W of A21. Swain Mtn quad. T30N R8E sec 26 NW of SW 1728 Comment
  UC1136838  Erigeron inornatus var. inornatus L. R. Short and D. Gish 1936-8-3 S- 397 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1795 Comment
  CAS-BOT-BC295505  Erigeron linearis John Thomas Howell 1934-6-14 12137 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CHSC68844  Erigeron linearis Vernon H. Oswald; Lowell Ahart 1997-6-24 8608 Lassen South of Susanville on the north side of Diamond Mtn. at slope along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. At roadside. 1889 Comment
  UC31511  Erigeron linearis Mrs. C. C. Bruce 1898-6-1 2182 x Lassen Madeline plains Madeline Comment
  CAS-BOT-BC295237  Erigeron lonchophyllus G. Schoolcraft 1999-6-29 2848 Lassen E. edge of Madeline Plains about 9 mi. ne of Ravendale 1615 Comment
  CHSC12615  Erigeron philadelphicus Jannae Pitts 1972-6-23 265 Lassen On the road to Eagle Lake Field Station, 2 mi se of the station on the e side of the road. Comment
  SEINET8667852 Image available Erigeron philadelphicus G. Schoolcraft 1993-6-1 2273 Lassen Secret Creek area s. of Tule Patch Spring 1463 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
  HSC5530  Erigeron philadelphicus M. S. Baker 1893-1 Lassen Vicker's Ranch, Big Valley, collected in the summer Comment
  CHSC99137  Erigeron pumilus subsp. intermedius Lowell Ahart; John Dittes 2008-6-19 14867 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
  POM33279  Erigeron pumilus subsp. intermedius Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  CHSC14070  Erigeron pumilus var. intermedius K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5812 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  JEPS89669  Erigeron pumilus var. intermedius Dean Wm. Taylor with Glenn Clifton 1990-6-12 10883 Lassen Ash Valley along Ash Creek at the crossing of Road 527 (Forest Road 39N08), Modoc Plateau Ash Creek; Modoc Plateau, Ash Valley, Ash Creek 1554 Comment
  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
  UC76008  Erigeron pumilus var. intermedius Milo S. Baker 1890-1 Lassen Honey Lake Valley, near Milford; Honey lake Valley Comment
  JEPS57084  Eriogonum baileyi var. baileyi W. L. Jepson 1918-8-2 7772 Lassen Beckwith Pass 1463 Comment
  SEINET530700  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-BC241564  Eriogonum baileyi var. baileyi Gary Schoolcraft 1985-7-29 1490 Lassen Western slopes of Ft. Sage Mtns. 1402 Comment
  UC762679  Eriogonum baileyi var. praebens R. F. Hoover 1940-10-5 4673 Lassen pass between Shaffer Mt. and Warren Peak Comment
  CAS-BOT-BC241834  Eriogonum caespitosum Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 2 1/2 miles north of Secret Valley, C.C.C. Camp, U.S. Hy. 395 Comment
  OBI48168  Eriogonum caespitosum Rhonda Riggins 1989-4-27 1634 Lassen US 395, 8.4 mi N Litchfield, 26.6 mi S Rav endale 1311 Comment
  CHSC14063  Eriogonum collinum K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5839 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  RSA338584  Eriogonum collinum Noel Holmgren, Patricia K. Holmgren 1980-7-3 9485 Lassen Hwy 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  SD86297  Eriogonum collinum James L. Reveal 1971-6-22 2463 Lassen Along U.S. Highway 395, 4.5 miles south of Ravendale, on a gravelly Artemisia flat. Comment
  UC762697  Eriogonum collinum R. F. Hoover 1940-9-29 4645 Lassen low pass between Shaffer Mt. and Warren Peak 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
  UC6274  Eriogonum elatum M. S. Baker and Frank Nutting 1894-7-25 Lassen Eagle Lake 1524 Comment
  POM105623  Eriogonum elatum var. elatum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  SEINET251879  Eriogonum elatum var. villosum Leila M. Shultz, John S. Shultz 1985-6-23 8608 Lassen Long Valley Creek drainage, 5 miles north of Doyle. 1305 Comment
  SEINET5330338  Eriogonum inflatum var. inflatum F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  CHSC100890  Eriogonum maculatum L. P. Janeway 2008-8-2 9532 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Ranch Road 1.8 km west of the CA-NV line. 1349 Comment
  OBI76908  Eriogonum marifolium Anthony Baniaga 2011-7-9 438 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1723 Comment
  NY803457  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 2003-8-21 2945 Lassen Slopes below McKessick Peak ca. 10 miles southeast of Milford, CA-nwse 1504 Comment
  UCD13226  Eriogonum nudum Janet Browder 1973-6-3 98 Lassen Lassen CO. Eagle Lake recreation Area, County Road 201, 1 mile north of airport. Elevation 5100 feet. 1554 Comment
  CAS-BOT-BC261445  Eriogonum nudum var. nudum Clare B. Hardham 1969-8-28 17442 Lassen West of Janesville Comment
  CHSC45484  Eriogonum nudum var. nudum Lowell Ahart; John Thomas Howell 1974-7-9 534 Lassen Along the edge of Eagle Lake Road, about 4 1/2 miles west of Susanville. 1584 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
  POM105327  Eriogonum ochrocephalum var. ochrocephalum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  RSA221819  Eriogonum ochrocephalum var. ochrocephalum Noel Holmgren, John Fay, Barton Bethers 1970-6-25 4378 Lassen North end of Petersen Mountain, near Hwy 395, 8 miles north of jct. with Hwy 70 (Hallelujah Junction) 1524 Comment
  SEINET524403  Eriogonum ochrocephalum var. ochrocephalum Paul A. Opler 2003-6-29 Lassen Quarry, 5 mi N of Hallelujah Junction, access road to west of US 295. Comment
  NY282047  Eriogonum ovalifolium var. nevadense G. Schoolcraft 1982-6-28 738 Lassen Ft. Sage Mtns. 762.0 Comment
  RSA59736  Eriogonum prociduum E. K. Balls 1950-5-19 14780 Lassen 16.5 miles W of Madeline on road from Adin 1677 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
  POM105202  Eriogonum sphaerocephalum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA716265  Eriogonum sphaerocephalum L. Ahart, John Dittes 2005-6-2 11984 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Road and Highway 70; 5.8 mi. (air) northwest of Hallelujah Junction. 1431 Comment
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Jun 1 2009
  CHSC57304  Eriogonum sphaerocephalum var. halimioides Mary Meyer 1980-7-9 Lassen One mile northwest of Horse Camp Spring. Meadow. 1706 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
  JEPS28865  Eriogonum sphaerocephalum var. halimioides Arthur Cronquist, Arthur H. Holmgren 1959-6-18 8482 Lassen 5 mi s Adin Comment
  RSA700235  Eriogonum sphaerocephalum var. halimioides L. P. Janeway 2001-6-20 7200 Lassen Modoc Plateau. Along '22' Rd. about 1.8 km west of Black Hole, about 11.9 km north-northeast of Harvey Mountain. 1500 Comment
  SEINET530721  Eriogonum sphaerocephalum var. halimioides Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  NY283149  Eriogonum sphaerocephalum var. sphaerocephalum N. H. Holmgren 1980-7-4 9499 Lassen Observation Peak, south side of mountain, 19 km. (11.5 miles) airline distance east-southeast of Ravendale 1830 Comment
  CAS-BOT-BC262743  Eriogonum strictum var. anserinum Ralph K. Gierisch 1968-7-11 3347 Lassen Lassen National Forest. Harvey Valley 1676 Comment
  UCD149821  Eriogonum strictum var. proliferum William Anderson 1963-6-2 s.n. Lassen Lassen County. Comment
  RSA0029339  Eriogonum umbellatum John F. Emmel 1991-7-22 1189 Lassen Long Valley: along Hwy 395, 3.8 road mi north of junction with Hwy 70. 1494 Comment
  SEINET10479553  Eriogonum umbellatum Mary Susan Taylor 1974-1 Taylor 306 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC267815  Eriogonum umbellatum var. covillei G. Schoolcraft 1997-8-6 2671 Lassen Diamond Mtn. 2316 Comment
  CHSC30618  Eriogonum umbellatum var. modocense Eric Miller 1975-7-8 7 Lassen N. E. slope of Gallatin Peak. 2011 Comment
  CHSC99123  Eriogonum umbellatum var. modocense Lowell Ahart; John Dittes 2008-6-19 14882 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  RSA700052  Eriogonum umbellatum var. modocense L. P. Janeway 2001-6-20 7189 Lassen High Cascade Range. South side of the junction of the '22' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain. 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
  CHSC68902  Eriogonum umbellatum var. nevadense Vernon Oswald; Lowell Ahart 1997-6-24 8640 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
  OBI75886  Eriogonum umbellatum var. nevadense Anthony Baniaga 2011-7-1 413 Lassen BLM. Fort Sage MTs OHV area, E of Doyle. Quad 1638 Comment
  RSA715993  Eriogonum umbellatum var. nevadense L. Ahart, John Dittes 2005-6-2 11980 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Rd. and Highway 70, 5.7 mi. (air) northwest of Halleluiah Junction. 1411 Comment
  RSA0118779  Eriogonum umbellatum var. polyanthum Lowell A. Ahart, John Dittes 2008-6-19 14882 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
  CHSC30597  Eriogonum vimineum Marc Held 1972-6-22 5 Lassen Approx. 500 yrds. north-east of E. L. B. S. 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
  CHSC84440  Eriogonum vimineum Lowell Ahart 2003-8-17 10516 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  POM105135  Eriogonum vimineum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC1032292  Eriogonum vimineum H. S. Yates 1936-8-11 6070 Lassen Baxter Creek Susanville Quadrangle, Baxter Creek Comment
  UC1601757  Eriogonum vimineum T. S. Brandegee 1892-6-26 Lassen Milford 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
  CAS-BOT-BC262358  Eriogonum vimineum M. S. Jussel 1931-9-6 s.n. Lassen On the road to Mt Lassen, five miles from Westwood 1828 Comment
  CAS-BOT-BC300341  Eriophyllum Ella Dales Cantelow 1941-5-22 s.n. Lassen N. of Litchfield. U.S. Hy 395. Lava Country Comment
  CAS-BOT-BC300947  Eriophyllum lanatum B. J. Hammerly 1941-6-20 43 Lassen 8 mi. S.-E. of Likely on Blue Lake road 1676 Comment
  CDA20364  Eriophyllum lanatum D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat Grade. 0 Comment
  CHSC117205  Eriophyllum lanatum var. achilleoides Lowell Ahart; John Dittes 2016-6-7 21004 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1136991  Eriophyllum lanatum var. achilleoides L. R. Short and J. Warren 1936-6-29 S 459 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1822 Comment
  UC1924222  Eriophyllum lanatum var. achilleoides Debra Valov 2004-6-8 2004252 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1270 Comment
  CAS-BOT-BC301529  Eriophyllum lanatum var. integrifolium H. D. Ripley; R. C. Barneby 1943-6-13 5717 Lassen South of Johnstonville 1325 Comment
  UC1118288  Eriophyllum lanatum var. integrifolium H. P. Hagge 1929-9-11 18 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. (Mb.1) 1828 Comment
  SEINET8673719  Eryngium alismifolium Unknown 1958-7-22 5012 Lassen next to Highway 395 , 4.5 miles south of Ravendale Comment
  UC1508837  Eryngium alismifolium Gary Schoolcraft 1981-8-11 558 Lassen Silva Flat Reservoir 1706 Comment
  CHSC99238  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-BC55196  Erysimum repandum John Thomas Howell 1934-6-10 11904 Lassen 3 miles south of Ravendale. Comment
  CHSC66266  Erythranthe breweri Vernon Oswald; Lowell Ahart 1996-6-24 7850 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  SEINET14291839  Erythranthe guttata D. W. Taylor 2005-6-29 19378 Lassen Piute Creek, 3 miles W from W edge of Susanville; 40.43106 -120.70866 1311 Comment
  CHSC5010  Erythranthe primuloides L. G. Bennett 1967-7-7 112 Lassen Deans Meadow, near Eagle Lake. 1706 Comment
  CHSC96726  Erythranthe primuloides Gordon Leppig; J. Cromwell 1997-7-27 604 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  PASA565  Erythronium purpurascens Margaret Stason 1932-6-21 440 Lassen Devil's Kitchen, Lassen National Park Comment
  SEINET10933162  Erythronium purpurascens Hall 1993-6-29 Hall 4294 Lassen Plants of Mount Lassen. Soupen Springs. 8000 feet. 2440 Comment
  RSA445591  Eschscholzia californica J. D. Detzer, M. Sacks 1977-7-28 35 Lassen 0.5 km S of Hwy 395, 4 miles W of Milford. 1386 Comment
  JEPS117958  Eucephalus breweri Zoya Akulova-Barlow Sep 2006 Lassen Sierra Nevada, Dyer Mountain Comment
  CHSC45999  Euclidium syriacum June McCaskill 1966-6-5 712 Lassen Frosty Acres Ranch, at end of Albaugh Road, .6 mile west of its junction with Bassett Road (ca. 2 miles south of U.S. Highway 299 and 4 miles southwest of Adin). On and about driveways in front of house. 1280 Comment
  CHSC5248  Euphorbia crenulata L. Harman 1946-6-23 Lassen Eagle Lake. Near top of Roop Mt. 2133 Comment
  SEINET9594781  Euphorbia crenulata D. W. Taylor 2012-7-18 21273 Lassen Along Hwy 44, pumice flat nestled in the cones ca 2 miles S of the S end of Poison Lke. 1783 Comment
  JEPS124752 Image available Euphorbia serpillifolia Peter Schultz 1967-7-12 76 Lassen 14.9 miles southeast of Adin on state highway 139; 1/4 mile west of Willow Creek Campground. Comment
  JEPS124375  Euphorbia serpillifolia subsp. serpillifolia Lowell Ahart, John Dittes 2015-7-13 20312 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS94086  Euthamia occidentalis Vernon H. Oswald and Lowell Ahart 1998-9-8 9579 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
  UCD98885  Fallopia convolvulus R. N. Raynor 1938-7-16 s.n. Lassen Clark Dairy Ranch, 3 mi. SE Susanville. Comment
  UCR259111  Festuca John F. Emmel 1994-7-17 1329 Lassen Summit area of Observation Peak 2409 Comment
  CAS-BOT-BC278459  Festuca idahoensis John Thomas Howell 1934-6-14 12169 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  JEPS127719  Festuca idahoensis Alejandro Brambila, Michael Dolan 2016-7-28 CA 320 -174 Lassen 171 on Likely Mtn. After the second tight switchback the population is off the road downslope. Comment
  POM112027  Festuca idahoensis Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  POM203052  Festuca idahoensis J. T. Howell 1934-7-6 12448 Lassen Harvey Valley Comment
  UC1024694  Festuca idahoensis Leo Whitney 1933-7-10 2151 Lassen ca 25 mi w Eagle Lake (upper end); Lassen National Forest, Halls Flat 1737 Comment
  UC1609256  Festuca idahoensis Vernon H. Oswald and Lowell Ahart 1993-7-8 5664 Lassen 1.9 mi n Hwy. 44 (Pittville Rd (Lassen 111, 36N01), between the road and railroad, on se edge of Poison Lake); Poison Lake 1709 Comment
  UCD65974  Festuca idahoensis L. Whitney 1935-6-17 3268 Lassen Lassen National Forest, Fruit Grower's Supply Company, Camp 10. Comment
  UCD65976  Festuca idahoensis L. Whitney 1933-7-1 Lassen Logan Mt. Comment
  UCD66360  Festuca rubra R. Tofsrud 1947-7-1 220 Lassen Cedar Cr. East of Madeline. Comment
  CAS-BOT-BC278931  Festuca rubra George W. Gillett 1957-7-29 947 Lassen Lassen Volcanic National Park. Along trail between Butte Lake and Snag Lake 1859 Comment
  CHSC65110  Floerkea proserpinacoides Vernon H. Oswald; Lowell Ahart 1995-7-24 7127 Lassen High Cascade Range. N of Lake Almanor and ca. 2 mi SE of Silver Lake on Forest Route 10, 0.8 mi SW of its jct. with Forest Road 30N21. 1920 Comment
  CHSC61058  Fragaria virginiana Vernon H. Oswald; Lowell Ahart 1993-8-3 5756 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. Along the margin of the swamp. 1932 Comment
  CAS-BOT-BC55731  Frangula rubra subsp. rubra John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49162 Lassen Elysian Valley northwest of Janesville 1325 Comment
  HSC21366  Fremontodendron californicum J. J. Wagoner 1965-4-30 49 Lassen 16 mi. W of Child's Meadow, along Hwy. 36 Comment
  RSA59761  Fritillaria pudica E. K. Balls 1950-5-18 14768 Lassen Above Ash Creek Public Camp., off rd. from Adin to Madeline. 1616 Comment
  CDA5850  Gaillardia aristata T. C. Fuller 1965-8-25 14036 Lassen east side of Highway 395 to Doyle, 30 paces north of culvert # 45-00, 2.4 miles north of Hallelujah Junction. 0 Comment
  JEPS126534  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. Comment
  POM69204  Galium aparine var. echinospermum Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  UC157915  Galium multiflorum Milo S. Baker 1890-1 Lassen Milford 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
  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
  CHSC23503  Gayophytum Wayne O. Baum 1971-7-12 71 -75 Lassen S. slope of Gallatin Peak. 2042 Comment
  CHSC29944  Gayophytum Robin L. Ondricek 1978-6-14 54 Lassen 1.8 mi e of Coleman Lake Rd. on Lassen Co. Al. 1950 Comment
  JEPS117572  Gayophytum diffusum subsp. diffusum Lowell Ahart, John Dittes 2010-7-31 17020 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
  UC1258488  Gayophytum diffusum subsp. parviflorum G. Schoolcraft 1979-7-3 116 Lassen up road to Observation Lookout 4.7 mi from Horne Ranch Road intersection 2103 Comment
  RSA768780  Gayophytum heterozygum L. Ahart, John Dittes 2010-7-31 17025 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1521 Comment
  UC20269  Gayophytum heterozygum M. S. Baker and F. Nutting 1894-6-9 Lassen Pine Creek Comment
  RSA517182  Gayophytum humile J. T. Howell, Gordon H. True 1973-8-1 50207 Lassen Sierra Nevada: Headwaters of Baxter Creek, east slope of Diamond Range, south of Susanville. 2165 Comment
  CHSC106072  Gayophytum racemosum Lowell Ahart; John Dittes 2010-7-31 17029 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
  CHSC93686  Gayophytum racemosum Lowell Ahart; John Dittes 2005-6-1 11884 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction. 1438 Comment
  CAS-BOT-BC217396  Gentiana affinis var. ovata Louella Bass; E. Lagel 1976-9-1 s.n. Lassen Willard Creek near confluence with Susan River, Sierra Nevada Comment
  SEINET8586424  Gentiana newberryi C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  RSA0026780  Geranium carolinianum Marcus E. Jones 1897-6-23 s.n. Lassen Amedee 1220 Comment
  CHSC77216  Geranium richardsonii Schoolcraft 1999-6-25 2840 Lassen SW of Lost Lake on SE slopes of Warner Mtns. 2225 Comment
  CHSC92757  Geranium viscosissimum L. P. Janeway 2005-7-4 8472 Lassen High Cascade Range. Gap/saddle 3.8 air km west of Harvey Mountain, at junction of Roads 35N04, 33N08, and 33N85. 1852 Comment
  JEPS44857  Geum aleppicum W. L. Jepson 1918-8-4 7810 Lassen Horse Lake 1554 Comment
  POM91888  Geum aleppicum Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  JEPS114756  Geum triflorum Lowell Ahart, John Dittes 2008-6-19 14872 Lassen Along a small wash, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  RSA0086586  Gilia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  RSA0086587  Gilia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  UCD117610  Gilia brecciarum Grady L. Webster 1989-5-13 7707 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  JEPS107828  Gilia inconspicua Lowell Ahart, John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1427 Comment
  GMDRC7730  Gilia salticola J. M. Andre, G. Clifton 1993-6-1 33406 Lassen Modoc Plateau: along US Hwy 395, approx. 30 mi. NE of Susanville, north end of Secret Valley, SE end of Snowstorm Mtn, about 15 mi. SSE of Ravendale 1375 Comment
  NY964018  Gilia salticola A. Tiehm 1986-5-12 10346 Lassen 14.4 road miles east of highway 395 on the dirt road to Smoke Creek and the Smoke Creek Desert 1448 Comment
  HSC95215  Glyceria borealis Gordon Leppig 1998-7-13 974 Lassen Modoc Natl. Forest, Blue Lake Ranch 1970 Comment
  OBI77053  Glyceria borealis Anthony Baniaga 2011-7-23 463 Lassen Lassen NF. Poison Lake. Poison Lake quad T32N R7E sec 4 1700 Comment
  JEPS127281  Gnaphalium palustre Lowell Ahart, John Dittes 2016-7-13 21108 Lassen About 150 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC29864  Gratiola ebracteata Robin L. Ondricek 1978-8-9 123 Lassen In mud at the ne edge of Mahogany Lake. 2057 Comment
  CHSC60414  Gratiola ebracteata Mary Ann Showers 1992-6-13 2543 Lassen Shoreline at western end of Widow Lake. Lassen Volcania National Park. 2072 Comment
  CHSC60922  Gratiola ebracteata Vernon H. Oswald; Lowell Ahart 1993-7-8 5650 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  JEPS4213  Gratiola neglecta Milo S. Baker 1899-8-24 Lassen Big Valley; Carmichael's Mill Comment
  CAS-BOT-BC110213  Grayia spinosa Peter H. Raven; Otto T. Solbrig 1958-6-17 13274 Lassen Along United States Highway 395, 19.0 miles south of Ravendale. Comment
  CHSC36443  Grayia spinosa Theresa Costa 1982-6-2 24 Lassen Along Ravendale Rd ca. 10 yd e of Horse Lake. Comment
  CHSC64781  Grayia spinosa Vernon H. Oswald 1995-5-24 6764 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. At the base of Amedee Mtns. 1249 Comment
  UC1136433  Grayia spinosa E. Sawyer 1935-6-27 225 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UC1567419  Grayia spinosa G. Schoolcraft 1989-5-31 1882 Lassen e. end of Skedaddle's (near rd. to n.) 1280 Comment
  UC585073  Grayia spinosa E. B. Babcock and G. L. Stebbins Jr. 1936-6-8 1777 Lassen 4 mi. s. Ravendale (n. end Secret Valley); n. end Secret Valley 1371 Comment
  CAS-BOT-BC314597  Grindelia hirsutula John Thomas Howell 1976-7-19 51955 Lassen Southwest of Susanville on Gold Run Road, Sierra Nevada 1341 Comment
  UCD132463  Grindelia nana Dan Marcum 1978-7-3 s.n. Lassen exact location unknown. Comment
  CDA36783  Gypsophila paniculata D. B. Joley 1976-6-22 1 Lassen Janesville. 0 Comment
  UCD119367  Hackelia amethystina G. Schoolcraft 1981-6-12 0456 Lassen Gold Run Rd., on lower slopes of Diamond Mtn., Susanville. 1889 Comment
  UC1587098  Hackelia californica G. Schoolcraft 1991-7-30 2197 Lassen e slope of Widow Mountain 1859 Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  SEINET10904891  Haplopappus bloomeri Taylor 1982-8-27 Taylor 5054 Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  CAS-BOT-BC305408  Helianthus annuus Louella Bass 1980-8-3 s.n. Lassen Standish Comment
  SBBG94823  Helianthus annuus G. K. Helmkamp 1990-9-23 A- 11 Lassen ca. 3 mi E of Susanville, along St Hwy 36 1341 Comment
  CHSC7636  Helianthus cusickii Beverley J. Wise 1969-5-15 22 Lassen 28.9 mi. East of Susanville on Hwy 395. 1554 Comment
  UC1483881  Helianthus cusickii G. Schoolcraft 1979-6-19 71 Lassen South of Big Spring Comment
  UC1191654  Heliotropium curassavicum Verne Grant and Irving Schneider 1947-9-5 8373 Lassen n.w. shore Eagle Lake (by Sam Webb's place (Spaulding)) Comment
  CHSC77177  Heracleum lanatum G. Schoolcraft 1997-7-30 2618 Lassen W slope of Dimond Mtn. 1950 Comment
  CHSC30620  Hesperochiron californicus Eric Miller 1975-7-9 14 Lassen E. of Dirt road adjacent to Coleman Lake, 30 ft. S. of overflow. 1950 Comment
  HSC65632  Hesperochiron californicus J. P. Smith, J. O. Sawyer 1971-5-23 4661 Lassen Along Hwy. 139, 15 mi. S of jct. with rd. to Thermo Comment
  HSC68936  Hesperochiron californicus Gary Schoolcraft 1979-4-18 9 Lassen .5 mi. W of CA-NV state line on Skedaddle Ranch Rd. 1546 Comment
  RSA164418  Hesperolinon micranthum Clare B. Hardham 1961-6-16 7449 Lassen Gold Run Creek south of Susanville. Comment
  UC17267  Hesperolinon micranthum Mrs. Brandegee Lassen Comment
  CHSC60795  Hesperostipa comata subsp. comata Vernon H. Oswald; Lowell Ahart 1993-6-14 5542 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
  POM68265  Heterocodon rariflorum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 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
  CHSC50819  Heterotheca villosa var. minor Vernon Oswald; Lowell Ahart 1990-7-25 4397 Lassen Intersection of Hwy 70 and Scott Rd, 2.2 mi west of Hwy 395. Roadside. 1463 Comment
  SEINET7106129  Heterotheca villosa var. minor Richard R. Halse 2010-8-26 8091 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
  HSC68934  Hieracium albiflorum Gary Schoolcraft 1980-7-29 345 Lassen On Big Valley Mtn. Timber sale area W of Bieber 1768 Comment
  JEPS88432  Hieracium greenei Vernon H. Oswald and Lowell Ahart 1996-8-1 8129 Lassen Forest Rd. 28N56 (D-Line) ca. 0.6 mi nnw Dyer Mtn. Lookout (ssw of Westwood) 2011 Comment
  JEPS124842 Image available Hippuris vulgaris Laurel Loeblich 1964-7-1 69 Lassen Collected in stagnant water at side of highway 139, 17.9 miles north of Susanville. Comment
  HSC63966  Holodiscus microphyllus var. glabrescens Teresa Prendusi 1980-7-10 Lassen N face of Little Fredonyer Peak, above Horse Lake 1768 Comment
  UCD85479  Hordeum brachyantherum L. Whitney 1933-8-2 s.n. Lassen Near Slate Creek. 1889 Comment
  UC1024652  Hordeum brachyantherum subsp. brachyantherum Leo Whitney 1933-8-2 2202 Lassen ca 8 mi nw Eagle Lake (Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  POM112122  Hordeum brachyantherum subsp. californicum Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  SEINET10591500  Hordeum jubatum Vernon H. Oswald, Lowell Ahart 1995-8-14 Oswald 7189 Lassen T33N R14E S2 NE1/4, Modoc Plateau, sagebrush scrub. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. Growing in moist soil along the margin of a large roadside pond. 1646 Comment
  UCD85868  Hordeum marinum subsp. gussoneanum John Thomas Howell 1974-7-10 50533 a Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  RSA0092310  Horkelia fusca Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31431 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  UC1542925  Horkelia fusca subsp. parviflora G. Schoolcraft 1987-6-23 1753 Lassen Ash Valley RNA 1554 Comment
  CHSC84869  Horkelia fusca subsp. tenella L. P. Janeway; B. Castro 2003-10-5 8007 Lassen High Cascade Range. Cone Lake and trailhead parking area (trail 1.3 km southwest into Caribou Wilderness Area). Around meadows and ponds. 2055 Comment
  JEPS44575  Horkelia fusca subsp. tenella C. S. Robinson 1930-7-20 37 Lassen near Westwood Jct.; Norval Flat, Lassen Forest 1747 Comment
  UC1483792  Horkelia fusca subsp. tenella Teresa Prendusi 1980-7-1 Lassen Littel Antelope Valley, Bureau of Land Management 1676 Comment
  CAS-BOT-BC536179  Horkelia fusca var. parviflora M. S. Taylor; B. Hammond 1982-7-8 4789 Lassen Along spur road ca. 1/3 mile west of Scott Road, ca. 1.5 miles NE of Beckwourth Pass 1463 Comment
  CAS-BOT-BC514265  Horkelia fusca var. pseudocapitata Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 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
  SEINET183889  Hydrophyllum capitatum var. alpinum L. Constance 1938-7-10 2325 Lassen 0.5 miles W of Fredonyer Pass. 1676 Comment
  OBI48149  Hydrophyllum capitatum var. alpinum Rhonda Riggins 1989-4-27 1647 Lassen US 395, 1.1 mi N Madeline, 8.8 mi S Modoc Co line 1676 Comment
  POM73939  Hydrophyllum occidentale Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA294534  Hymenolobus procumbens A. Tiehm 1980-5-29 5749 Lassen North end of Honey Lake Valley, just N of Hot Springs 1.1 air mile NNW of Wendel. 1232 Comment
  RSA88526  Hypericum androsaemum P. H. Raven 1951-7-27 3627 Lassen Lake Ediya Comment
  POM86608  Hypericum formosum var. scouleri Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  RSA746512  Hypericum perforatum K. M. Meyer, A. Townesmith 2007-7-19 140 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  HSC69298  Idahoa scapigera Gary Schoolcraft 1980-4-8 203 Lassen E side of Schaffer Mtn., 0.25 mi. W of Hwy. 395 1463 Comment
  JEPS128412  Iliamna bakeri Jennifer Mueller 2017-8-15 CA 370 -262 Lassen Below Tuledad VAlley Ranch take the access road into the Cottonwood Mountain towards the Dodge Fire. Comment
  SD61029  Iliamna bakeri Darley F. Howe 1964-8-2 3924 Lassen Hillside above Parsnip Creek, Warner Mountains; Modoc National Forest. 1829 Comment
  UC106649  Ipomopsis aggregata T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  UC908152  Ipomopsis aggregata Loyd Swift 1928-6-12 Lassen Hall's Flat Lassen National Forest 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
  UC23470  Ipomopsis congesta M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC63410  Ipomopsis congesta subsp. congesta V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6354 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  CHSC68754  Ipomopsis congesta subsp. congesta Vernon H. Oswald; Lowell Ahart 1997-5-27 8493 Lassen West side of Hwy. 139 south of Willow Creek Guard Station, 0.9 mi south of Forest Road 38N04 to Coyote Flat. Along the road. 1577 Comment
  CHSC75515  Ipomopsis congesta subsp. congesta Vernon H. Oswald; Lowell Ahart 1999-6-9 9745 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  CHSC107328  Iris hartwegii subsp. hartwegii Lowell Ahart; John Dittes 2011-6-21 17524 -A Lassen 335 feet northwest of Big Valley Canal, 2.1 miles (air) south of County Road 87, 6.6 miles (air) northeast of Bieber, 7.9 miles (air) west by southwest of Adin, Big Valley. 1264 Comment
  CHSC59160  Isoetes bolanderi Vernon H. Oswald; Lowell Ahart 1992-9-15 5215 Lassen Island Lake located N of Bonte Pk. And ca. 1.5 mi W of Juniper Lake campgrounds. Lassen Volcanic National Park. 2164 Comment
  CHSC66228  Isoetes nuttallii Vernon H. Oswald; Lowell Ahart 1996-6-24 7848 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagel Lake Rd. (A1) and 2.5 mi S of Eagle Lake. 1633 Comment
  CHSC77255  Isolepis G. Schoolcraft 1997-8-4 2675 Lassen W of Willow Creek Valley. 1554 Comment
  CAS-BOT-BC324777  Iva axillaris John Thomas Howell 1975-7-23 51394 Lassen Susanville, Sierra Nevada 1295 Comment
  CAS-BOT-BC324779  Iva axillaris M. S. Taylor 1982-8-19 5022 Lassen E side of Highway 395 ca. 4 miles north of its junction with Highway 70 at Hallalujah Junction 1493 Comment
  HSC5876  Iva axillaris M. T. Milligan 1964-8-6 203 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  RSA719895  Iva axillaris subsp. robustior Michael A. Vincent, K. Levings 2006-7-29 12908 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  CHSC35570  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 miles west of Madeline. Comment
  JEPS94475  Ivesia paniculata Vernon H. Oswald and Lowell Ahart 1997-5-27 8494 Lassen 0.1 mi e of Highway 139 (n of Susanville on Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat, on n side of a creek paralleling the road); Forest Route 38N04 1546 Comment
  UC1502548  Ivesia paniculata Thomas W. Nelson and Jane P. Nelson 1980-7-6 5984 Lassen 16 mi e Adin (along Adin-Madeline Rd); Ash Valley; Ash Valley, Lassen Co. 1554 Comment
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Aug 12 2008
  UC1594838  Ivesia paniculata J. Stephen Shelly and Ginger V. King 1985-6-29 1029 Lassen Adin-Madeline Rd. Ash Valley (15.4 mi w of U.S. Hwy 395) 1554 Comment
  CHSC93553  Juncus bryoides Lowell Ahart; John Dittes 2005-6-2 11960 Lassen Long Valley, moist meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, 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
  UC1583258  Juncus bufonius Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9467 Lassen 5.6 km (3.5 mi) s Madeline (along Highway 395); Madeline Plains 1620 Comment
  CHSC113074  Juncus bufonius var. bufonius Lowell Ahart; John Dittes 2013-7-23 18907 Lassen On the southwest side of a man made pond, about 160 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117196  Juncus bufonius var. congestus Lowell Ahart; John Dittes 2016-6-7 20987 Lassen 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC117204  Juncus bufonius var. occidentalis Lowell Ahart; John Dittes 2016-6-7 20988 Lassen West edge of pond, 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1107336  Juncus bufonius var. occidentalis Jean Langenheim 1957-6-22 4364 Lassen near Eagle Lake edge; Eagle Lake Comment
  CHSC60787  Juncus hemiendytus var. abjectus Vernon H. Oswald; Lowell Ahart 1993-6-3 5481 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), where it diverges from Lassen 21 (32N02) to Eagle Lake, on the S side of Pine Creek Valley, between Poison Lake and Susanville. Along drainages and on the edge of a meadow. 1725 Comment
  CHSC66277  Juncus hemiendytus var. abjectus Vernon H. Oswald; Lowell Ahart 1996-6-24 7852 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. At a pile of fence posts on the W side of the meadow just S of the cabins. 1633 Comment
  CHSC101039  Juncus hemiendytus var. hemiendytus John Dittes 2008-5-22 1521 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 480 feet north of intersection of Hwy 139 and FS Road 36N02; open, rocky volcanic toe-slope on northeast side of Willow Creek. 482 Comment
  RSA201267  Juncus howellii J. T. Howell 1959-9-23 34880 Lassen Lassen County: N end of Juniper Lake. 2058 Comment
  CAS-BOT-BC110769  Juncus mertensianus Clare B. Hardham 1969-8-28 17441 Lassen Sierra Nevada. West of Janesville. Comment
  POM111106  Juncus mexicanus Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  SEINET10533379  Juncus mexicanus Douglas G. LeDoux, David B. Dunn 1975-5-25 LeDoux 791 Lassen Collected 3 miles n of milford on hwy. 395 At honey lake campgrounds Comment
  HSC95328  Juncus nevadensis Gordon Leppig 1998-7-12 946 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS87450  Juncus nevadensis Vernon H. Oswald and Lowell Ahart 1993-8-3 5745 Lassen ca. 13 (air) mi. n. Lake Almanor (s.w. edge of Cooper Swamp located e. of Silver Lake just e. of Caribou Wilderness); Cooper Swamp 1932 Comment
  SEINET7421843 Image available Juncus nevadensis A. L. Hormay 1941-1 25440 Lassen Sec. 31, T 33N, R 9 E, Little Harvey Valley. Altitude 5500 ft. 1676 Comment
  CHSC60461  Juncus orthophyllus Mary Ann Showers 1992-6-13 2537 Lassen Lassen Volcanic National Park. Meadow along trail from Snag Lake jct to Widow Lake. 1828 Comment
  UC1133742  Juncus tenuis Robert W. Gardner 1939-6-28 G- 33 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1706 Comment
  CHSC117179  Juncus uncialis Lowell Ahart; John Dittes 2016-6-7 21013 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  SEINET11738933  Juniperus californica L. V. Ritter 1969-1 191 Lassen E side Forward Rd., 8 mi NE Manton Comment
  UC1001953  Juniperus occidentalis Mrs. B. A. Berry 1954-9-29 7 Lassen n Westwood Comment
  UC1136938  Juniperus occidentalis L. R. Short 1936-9-30 S- 508 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1828 Comment
  UC572307  Juniperus occidentalis C. G. Albertus 1935-11-1 294 Lassen 2.1 mi ne Chats; Sierraville quadrangle 1569 Comment
  UC773866  Juniperus occidentalis L. R. Short 1936-9-30 S- 508 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1828 Comment
  UCD22742  Juniperus occidentalis Todd Sloat 1988-6-4 16 Lassen NE California. Pittville, CA. 1036 Comment
Read comments
Apr 29 2013
  SEINET5334982  Juniperus occidentalis W. Priest 1956-4-22 s.n. Lassen about 2 miles north of Susanville 1524 Comment
  SEINET10613513  Juniperus occidentalis subsp. australis Mary Susan Taylor 1982-5-29 Taylor 4570 Lassen T22N R17E e1/2 sw1/4 sec 23. Loyalton quad. In sagebrush Scrub along dirt road paralleling Highway 395 on its east side, ca 1/2 mile north of 395 jct with Scott Road, ca 20 miles northof Reno. 1525 Comment
  RSA647569  Juniperus occidentalis var. occidentalis Marion P. Harthill 1972-6-17 812 Lassen Ravendale 1768 Comment
  CHSC57200  Kelloggia galioides Mary Meyer 1980-7-21 Lassen Beneath white fir stand. 2103 Comment
  CHSC65119  Kelloggia galioides Vernon H. Oswald; Lowell Ahart 1995-7-24 7133 Lassen N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just S of Pine Creek. 1950 Comment
  RSA121075  Kelloggia galioides L. R. Short, D. Gish 1936-6-10 S- 379 Lassen Burgess Spr. Exp. Range. Lassen Forest. (MDM?) 1814 Comment
  UC1483872  Kochia americana G. Schoolcraft 1980-5-8 231 Lassen s. end Cal-Neva Lake 1219 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
  POM113359  Koeleria macrantha Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1616 Comment
  UC1136816  Koeleria macrantha George A. Fischer and Irwin H. Johnson 1933-7-12 F 205 Lassen Grass Valley; Lassen National Forest, Grass Valley 1699 Comment
  UC53716  Koeleria macrantha M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  CHSC59133  Kyhosia bolanderi Vernon H. Oswald; Lowell Ahart 1992-8-25 5195 Lassen Lassen Volcanic National Park. Slope at the SE corner of Snag Lake. 1853 Comment
  JEPS88425  Kyhosia bolanderi Vernon H. Oswald and Lowell Ahart 1996-8-1 8116 Lassen ca. 0.1 mi downstream Indian Ole Dam on Mountain Meadows Reservoir (sw of Westwood); Hamilton Branch of the North Fork of the Feather River 1524 Comment
  UC891450  Kyhosia bolanderi A. A. Heller 1937-9-1 15342 Lassen about a mile e of Westwood Comment
  CHSC76088  Lactuca tatarica subsp. pulchella Lowell Ahart; Vernon H. Oswald 1999-9-13 8233 Lassen On the strand of Eagle Lake, west of Highway 139, near the south end of the lake and highway, Eagle Lake. 1554 Comment
  UCR26892  Ladeania lanceolata E. C. Nord 1958-7-10 N- 107 Lassen Honey Lake Valley/Foot of Sierra Nevada Mtns., Fort Sage Game Range, 3 mi. south of Herlong 1372 Comment
  CAS-BOT-BC341483  Lagophylla ramosissima John Thomas Howell 1934-6-10 11863 Lassen Honey Lake Valley, 37 miles s. of Susanville Comment
  JEPS38999  Lagophylla ramosissima W. L. Jepson 1918-8-2 7776 Lassen Bedswith Pass 1463 Comment
  CAS-BOT-BC341481  Lagophylla ramosissima Barrett Anderson 1986-7-9 3122 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  CDA8086  Lagophylla ramosissima T. C. Fuller 1964-10-7 12692 Lassen Hillside Cemetery, south side of Highway 299 to Fall River Mills, ca. 2 miles southwest of Nubieber. 0 Comment
  CHSC112414  Lasthenia glaberrima Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18739 Lassen Near a drainage filled with dirt from construction of a pond, about 100 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  POM29621  Lathyrus Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  CAS-BOT-BC321496  Layia glandulosa Clare B. Hardham 1961-6-16 7486 Lassen Gold Run Creek, S of Susanville. Comment
  CHSC67171  Layia glandulosa James D. Jokerst 1991-5-29 3311 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
  CHSC71224  Layia glandulosa Vernon H. Oswald; Lowell Ahart 1998-6-4 9143 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  CAS-BOT-BC321497  Layia glandulosa Margaret Williams 1974-7-27 74- 2 -51 Lassen Burned area near Hallelujah Junction, W of Hwy 395 and S of Hwy 70 1493 Comment
  CHSC4842  Lemna trisulca R. Carter 1967-7-13 591 Lassen 5 mi e of Eagle Lake Field Station, at point where rd comes nearest to Willow Cr. 1560 Comment
  CAS-BOT-BC88739  Lepidium appelianum Ira L. Wiggins; Dorothy B. Wiggins 1961-6-16 16529 Lassen 4.1 miles east of Bieber. Comment
  CAS-BOT-BC88821  Lepidium campestre Louella Bass 1974-5-23 EV 143 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  JEPS114349  Lepidium campestre Lowell Ahart, John Dittes 2008-6-20 14957 Lassen In meadow, about 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CAS-BOT-BC89493  Lepidium heterophyllum John Thomas Howell 1976-7-19 51957 Lassen Sierra Nevada. Southwest of Susanville on Gold Run Road. 1341 Comment
  NY628139  Lepidium latifolium M. D. Windham 2001-6-22 2475 Lassen Northwest of Wendel in Honey Lake Valley near base of Skedaddle Mountains ca. 10.77 km WSW of the summit (7654) of Hot Springs Peak. 1231.4 Comment
  CAS-BOT-BC89718  Lepidium latifolium John Thomas Howell 1975-7-23 51413 Lassen Sierra Nevada. On Highway 395 between Johnstonville and Janesville. 1280 Comment
  CHSC36487  Lepidium perfoliatum Margaret E. Halloran 1982-6-2 1 Lassen Ca. 2 mi e jct of Hwy 139 and Ravendale Rd. 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
  UC1126714  Lepidium perfoliatum A. Simontacchi 1940-6-8 829 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC1143000  Lepidium perfoliatum August L. Hormay 1934-5-15 Lassen nw of Black Mt.; Lassen National Forest, Forest and Range Expt. Sta. 1584 Comment
  RSA152592  Lepidium perfoliatum I. L. Wiggins, Dorothy Wiggins 1961-6-11 16332 Lassen 13.5 mi. E of Susanville. Comment
  SEINET10448293  Lepidium perfoliatum Mary Susan Taylor 1982-5-29 Taylor 4565 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  UC1137585  Leptodactylon pungens A. Simontacchi 1940-6-30 911 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quad. Comment
  CHSC68896  Leptosiphon ciliatus Vernon Oswald; Lowell Ahart 1997-6-24 8605 .1 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
  POM74003  Leptosiphon ciliatus Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  CHSC44326  Leptosiphon harknessii Lowell Ahart; John Thomas Howell 1974-7-9 518 Lassen Along the edge of Eagle Lake Road, near the south-west side of Eagle Lake. 1584 Comment
  CHSC4794  Leptosiphon harknessii R. Carter 1967-6-29 571 Lassen Roadside, n side of rd. On rd to Murrer's Medow. Eagle Lake. 1584 Comment
  POM364710  Leptosiphon harknessii J. T. Howell 1934-6-10 11844 Lassen Near Plumas Junction Comment
  CAS-BOT-BC334598  Leucanthemum vulgare G. Schoolcraft 1987-6-17 1746 Lassen Along Hwy 36 about 3 miles east of Westwood 1554 Comment
  OBI77050  Leucocrinum montanum Anthony Baniaga 2011-5-31 295 Lassen Lassen NF. Off hwy 44, along 32N60. Poison Lake quad T32N R7E sec 14 SW of NE 1705 Comment
  CHSC60763  Lewisia triphylla Vernon H. Oswald; Lowell Ahart 1993-6-3 5473 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. On the margins of a meadow. 1731 Comment
  UC803892  Leymus G. L. Stebbins Jr. 1949-8-6 4007 Lassen 5 mi w Eagle Lake; McCoy Flat 1524 Comment
  CAS-BOT-BC283769  Leymus cinereus Margaret Williams; Steven Williams 1974-7-26 74 -L-41 Lassen Burned area near Hallelujah Junction, W of Highway 395 and S of Highway 70 1493 Comment
  CAS-BOT-BC283770  Leymus cinereus John Thomas Howell 1973-7-10 49770 Lassen Near Westwood 1554 Comment
  JEPS126490  Leymus cinereus Alia Johnson, Jocelyn Munoz, Jillian Sarazen 2016-7-14 CA 350 -76 Lassen Heading north on 395 turn right on to Smoke Creek Road and drive up the Skedaddle Road, head uphill to the end of private property squares. Comment
  UC573939  Leymus cinereus H. S. Yates 1936-8-12 9086 Lassen McKenzie Meadow Susanville Quadrangle Comment
  UC593547  Leymus cinereus E. B. Babcock and G. L. Stebbins Jr. 1936-6-8 1779 Lassen 4 mi s Ravendale (e-facing slope of creek at n end of Valley); Secret Valley 1371 Comment
  RSA129541  Leymus condensatus C. W. Hanks 1934-8-18 57 Lassen Sierraville; N. W. part of Upper Long Valley 1616 Comment
  SEINET239966 Image available Leymus triticoides G. L. Clifton 1996-6-5 34629 Lassen East of Herlong close to the railroad. 1234 Comment
  UCD65590  Leymus triticoides R. Tofsrud 1947-7-1 218 Lassen Near Thermos. Comment
  CHSC66712  Ligusticum grayi Vernon H. Oswald; Lowell Ahart 1996-8-1 8127 .1 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. On the downhill side of the road. 1737 Comment
  UC1100164  Lilaea scilloides Malcolm A. Nobs and S. Galen Smith 1949-7-20 1048 Lassen Bieber; along Highway 299 Comment
  UC1609095  Lilaea scilloides Vernon H. Oswald and Lowell Ahart 1993-7-8 5645 Lassen near se end Poison Lake (Pittville Rd (Lassen 111, 36N01), near its intersection with 33N11, 0.4 mi n of Hwy 44) 1709 Comment
  CAS-BOT-BC130513  Lilium John Thomas Howell 1976-7-19 51979 Lassen On Gold Run Creek southwest of Susanville 1386 Comment
  CAS-BOT-BC130709  Lilium pardalinum Louella Bass 1973-6-15 114 Lassen Elysian Valley 1325 Comment
  CHSC54871  Limosella acaulis Vernon H. Oswald 1991-9-23 4878 Lassen Butte Lake in the northeast corner of the park. Lassen Volcanic Park. 1841 Comment
  JEPS107873  Linanthus ciliatus Lowell Ahart, John Dittes 2005-6-2 11936 Lassen Along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1600 Comment
  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
  CHSC6204  Linanthus pungens 1944-7-9 Lassen Eagle Lake. Dow Butte. 2042 Comment
  UC106752  Linanthus septentrionalis T. S. Brandegee 1892-6-30 Lassen Jonesville Comment
  UC1136855  Linum lewisii L. R. Short and D. Gish 1936-6-5 S 385 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1760 Comment
  UC867779  Linum lewisii Alice Eastwood Aug 22 1912-Aug 26 1912 1853 Lassen Trail from Morgans Springs to Lassen Butte Comment
  CHSC36448  Linum lewisii var. lewisii Susan H. Euing 1982-6-3 2 Lassen Ca. 0.8 mi s jct forest service roads 5.16 and 5.17 heading towards 5-Corners. Comment
  CHSC4431  Linum lewisii var. lewisii K. R. Stern 1967-7-1 2472 Lassen Ca. 2 mi. S of S end of Eagle Lake. 1676 Comment
  CHSC68872  Lithophragma glabrum Vernon Oswald; Lowell Ahart 1997-6-24 8641 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
  UC1258492  Lithophragma glabrum G. Schoolcraft 1980-4-8 201 Lassen along Shaffer Mountain Peak road just w Hwy. 395; Shaffer Mountain Peak road 1402 Comment
  UC1483825  Lithophragma glabrum G. Schoolcraft 1980-4-8 201 Lassen e side Shaffer Mountain; e side Shaffer Mountain 1463 Comment
  SD43499  Lithophragma parviflorum Philip A. Munz 1947-5-18 11862 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville 1509 Comment
  CHSC21169  Lithophragma tenellum M. S. Taylor 1974-5-4 228 Lassen Ca. 500 yds n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC60768  Lithophragma tenellum Vernon H. Oswald 1993-6-3 5478 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poisen Lake and Susanville. 1731 Comment
  JEPS650  Lithophragma tenellum Viola Brainerd Baird 1921-7-4 Lassen Drakesbad, (Resort) Comment
  CDA42915  Lithospermum arvense L. Ahart, John Dittes 2012-7-11 18351 Lassen North edge of a farmed field, on the south side of the highway, about 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittville, 3955 feet east of Lassen-Shasta County Line, Fall River Valley. Comment
  UC1924235  Lithospermum ruderale Debra Valov 2004-6-9 2004259 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 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
  CHSC12951  Lomatium K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5842 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  SEINET8588616  Lomatium austiniae S. Jesselson, A. Ortega, J. White, A. Rosenblum 2015-5-28 NV 030 -1064 Lassen Plumas allotment. HWY 395 into CA, first median crossing after check station, turn right, follow road left (north) to proposed fence site perpendicular to power line. 1547 Comment
  RSA0049671  Lomatium bicolor var. leptocarpum Dean Wm. Taylor 2012-5-15 21195 Lassen Windmill Flat vicinity; one mile north of the north end (watershed East Fork Juniper Creek, tributary to Pit River at Big Valley) 1676 Comment
  POM260287  Lomatium bicolor var. leptocarpum C. L. Hitchcock 1940-5-26 6648 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  SEINET8584736  Lomatium foeniculaceum subsp. macdougalii W. Harnach 2010-6-8 1243 Lassen 2 miles west of the California Nevada state line, north side of Fort Sage Road, northeast of Doyle, CA. 1219 Comment
  RSA724325  Lomatium macrocarpum Richard Halse 1977-5-22 1549 Lassen Along Highway 395, 9.5 miles north of Madeline 1490 Comment
  CHSC106579  Lomatium nevadense C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  UC1951074  Lomatium nevadense Debra Valov 2009-4-25 2009017 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  CHSC99119  Lomatium nevadense var. nevadense Lowell Ahart; John Dittes 2008-6-19 14899 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
  JEPS96076  Lomatium nevadense var. nevadense Vernon H. Oswald and Lowell Ahart 1996-6-24 7862 Lassen 2.5 mi. s. Eagle Lake (Papoose Meadows, ca. 0.5 mi. e. of Eagle Lake Rd. (A1), w. side of the meadow ca. 0.4 mi. s. of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1561383  Lomatium nevadense var. nevadense Barbara Ertter with Gary Schoolcraft 1987-6-16 7185 Lassen ridge w. Hot Springs VABM (Skeedaddle Mts., on n.e. side of Honey Lake); Skeedaddle Mts., Honey Lake 2133 Comment
  CHSC27618  Lomatium nevadense var. parishii Robert A. Schlising 1978-6-8 3287 Lassen E of Eagle Lake and north of Murrers Upper Meadow. 1536 Comment
  UC1123085  Lomatium nevadense var. parishii A. Simontacchi 1940-5-27 768 A Lassen 9.3 mi NW of Crater Lake 1752 Comment
  CHSC89727  Lomatium nudicaule L. P. Janeway 2004-6-26 8150 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
  JEPS103161  Lomatium plummerae G. Schoolcraft 1996-5-13 2519 Lassen Ft. Sage OHV area 3 mi. NE of Doyle 1402 Comment
  JEPS94114  Lomatium plummerae Vernon H. Oswald and Lowell Ahart 1998-5-22 9111 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts. 0.6 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1402 Comment
  CAS-BOT-BC217795  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6564 Lassen U.S. Hwy 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield 1330 Comment
  CAS-BOT-BC217798  Lomatium ravenii G. Schoolcraft No date on label 212 Lassen North of Shaffer Mountain 1356 Comment
  OBI48161  Lomatium ravenii Rhonda Riggins 1989-4-27 1641 Lassen US 395, 14 mi N Litchfield, 21 mi S Ravendale. 1311 Comment
  UC1177543 Image available Lomatium ravenii Peter H. Raven with Otto T. Solbrig 1958-6-17 13287 Lassen 1.8 mi. s. Ravendale (along U.S. Hwy. 395) Comment
  UC1479584 Image available Lomatium ravenii Gary Schoolcraft 1980-5-6 218 A Lassen Honey Lake Island 1219 Comment
Read comments
Oct 26 2017
  JEPS118182  Lomatium triternatum var. triternatum Dean W. Taylor 2004-5-11 19061 Lassen 1.5 miles southwest of Constantina along Highway 395 1402 Comment
  POM78250  Lomatium vaginatum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  UC21281  Lomatium vaginatum Mrs. C. C. Bruce June 1898 2286 Lassen <Madaline> Plains Comment
  UCD55282  Lomatium vaginatum Ellen Dean; Gary Schoolcraft 2006-5-16 3101 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. 1207 Comment
  CHSC7677  Lotus corniculatus Beverley J. Wise 1969-5-23 59 Lassen 35.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  UC1249270  Lotus corniculatus Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8474 Lassen 1 mi se Milford (near Honey Lake, 26 mi se of Susanville) 1310 Comment
  NY716010  Lotus purshianus A. G. Jones 1984-8-11 6876 Lassen Along Road 395, near Doyle 1350 Comment
  JEPS107457  Lotus purshianus var. purshianus Lowell Ahart, John Dittes 2005-6-2 11970 -A Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  UC1544785  Lotus purshianus var. purshianus Almut G. Jones 1984-8-11 6876 Lassen near Doyle (along Road 395) 1350 Comment
  UC862219  Lotus purshianus var. purshianus A. A. Heller 1938-7-28 15300 Lassen just e Westwood Comment
  RSA28314  Lotus unifoliolatus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC4820  Lupinus R. Carter 1967-7-16 618 Lassen Willow Creek Valley, e of Murrer's Ranch, 1.5 mi w of highway 139 on rd to Eagle Lake, ca. 12 mi n of Susanville, on s side of rd. Comment
  JEPS85684  Lupinus W. L. Jepson 1937-8-11 19375 Lassen Milford 1280 Comment
  SEINET7123961 Image available Lupinus andersonii E. A. Bourdo Jr. 1972-1 s.n. Lassen Lassen National Park Comment
  UCD35731  Lupinus arbustus Beecher Crampton 1960-6-18 5724 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch; northeastern part of the county. 1981 Comment
  SEINET10484619  Lupinus arbustus subsp. calcaratus Jeffrey Huber 1971-6-2 Huber 110 Lassen 4 miles s of adin along cal hwy 139 in basalt - caly; valley floor in artemisia 1341 Comment
  CAS-BOT-BC208741  Lupinus argenteus var. heteranthus Philip A. Munz 1947-5-20 11888 Lassen Milford 1264 Comment
  CAS-BOT-BC208743  Lupinus argenteus var. heteranthus Roxana S. Ferris; Rena Duthie 1919-6-13 18 Lassen Madaline Comment
  CAS-BOT-BC208757  Lupinus argenteus var. heteranthus Doris Kildale Gillespie 1930-5-13 9372 Lassen Between Susanville and Janesville. Comment
  CAS-BOT-BC208759  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-5-23 47349 Lassen Susanville, 1.4 miles west, Highway 36 Comment
  NY736926  Lupinus argenteus var. heteranthus A. A. Heller 1938-6-23 15203 Lassen Along U.S. Highway #395 just outside of Johnstonville. Upper Sonoran Life Zone Comment
  UC1137309  Lupinus argenteus var. heteranthus L. R. Short and Wm. Gansberg 1936-7-3 S- 471 Lassen Burgess Spr. Exp. Range; Lassen National Forest 1859 Comment
  UC865087  Lupinus argenteus var. heteranthus A. A. Heller 1938-6-23 Lassen just outside of Johnstonville ( along U.S. Hwy 395) Comment
  UC865100  Lupinus argenteus var. heteranthus W. A. Archer 1938-6-16 6020 Lassen 5 mi w Doyle; w of Doyle Comment
  UCR270692  Lupinus argenteus var. heteranthus John F. Emmel 1999-6-5 1631 Lassen Honey Lake Basin, north end of Fort Sage Mountains, east base of Turtle Mountain 1280 Comment
  SEINET5327895  Lupinus argenteus var. heteranthus N. H. Holmgren, P. K. Holmgren 1978-6-11 8925 Lassen Painters Flat road, 31.2 km (19.4 mi) E of Ravendate and 25 km (15.5 mi) airline distance 1800 Comment
  SEINET5328081  Lupinus argenteus var. heteranthus F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  JEPS91018  Lupinus argenteus var. meionanthus Dean W. Taylor 1974-6-14 3722 Lassen at summit ca. 4 mi ssw Janesville (Janesville Grade Rd.); Plumas National Forest Comment
  POM26869  Lupinus caudatus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  SD43491  Lupinus caudatus Philip A. Munz 1947-5-20 11888 Lassen Milford 1264 Comment
  SEINET10490606  Lupinus caudatus subsp. caudatus H. Dearing, M. Dearing 1938-6-30 Dearing 2228 Lassen 40 mi. W of susanville, poison lake. 1219 Comment
  SEINET10490607  Lupinus caudatus subsp. caudatus Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 863 Lassen Collected on road bank 24 mi n of calif. State line on hwy 395. 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
  SEINET10488723  Lupinus lepidus Williams 1983-7-31 Williams 126 Lassen Roadside near janesville. Sandy soil with sagebrush and bitterbrush. Great Abundance 1280 Comment
  CHSC91961  Lupinus lepidus var. confertus Richard R. Halse 2004-7-22 6670 Lassen Along U.S. Hwy. 395 ca. 7.8 miles southeast of Susanville. 1293 Comment
  CHSC60355  Lupinus lepidus var. lobbii Mary Ann Showers 1992-6-27 2602 Lassen Lassen Volcanic National Park. Pumice Flat northwest of Crescent Crater. 2194 Comment
  UC1481378  Lupinus lepidus var. sellulus B. J. Cox 1971-6-11 3186 Lassen 3 mi E of Westwood ( on Ca. Hwy. 36) 1607 Comment
  UC126929  Lupinus leucophyllus M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  SBBG30552  Lupinus microcarpus var. microcarpus D. Myrick 1968-6-19 1957 Lassen Hwy 395, 23 mi S of Alturas 1524 Comment
  CHSC36851  Lupinus nevadensis M. S. Taylor 1982-5-29 4567 Lassen Along dirt road paralleling Hwy 395, on its e side, ca. 1/2 mi n of Hwy 395 jct with Scott Rd, ca. 20 mi n of Reno. Comment
  CHSC5288  Lupinus obtusilobus 1944-7-26 Lassen Juniper Lake. 2055 Comment
  UC725891  Lupinus onustus A. A. Heller 1940-5-22 15662 Lassen above Westwood Cemetary; above the Westwood Cemetary 1524 Comment
  UCR79417  Lupinus polyphyllus subsp. superbus J. T. Howell, G. H. True, Margaret Williams 1973-6-28 49412 Lassen Sierra Nevada Mtns/ Modoc Plateau, Elysian Valley, west of Janesville 1326 Comment
  HSC40685  Lupinus sellulus var. artulus Thomas W. Nelson, Jane P. Nelson 1976-8-1 3123 Lassen Lassen Volcanic National Park at Devestated Area Comment
  OBI75894  Luzula comosa Anthony Baniaga 2011-8-17 505 Lassen Lassen Natl Forest. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E sec 31 SW of SW 1905 Comment
  CHSC4269  Luzula macrantha K. R. Stern 1967-6-24 2419 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagel Lake Biological Station. 1554 Comment
  JEPS107819  Lythrum hyssopifolia Lowell Ahart, John Dittes 2005-6-2 11969 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  RSA0011271  Lythrum hyssopifolia L. Ahart, John Dittes 2005-6-2 11969 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
  RSA252467  Machaeranthera canescens var. canescens R. F. Thorne, C. W. Tilforth 1969-9-6 39268 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  SEINET3155222  Machaerocarpus californicus M. E. Jones 1897-6-24 sn Lassen 10 to 15 miles west from Amedee 1219 Comment
  UCSB48516  Madia Clare B. Hardham 1961-6-16 7451 Lassen collected at Gold Run Creek S of Susanville Comment
  CAS-BOT-BC343695  Madia elegans Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin's Ranch 1463 Comment
  UC89447  Madia elegans T. S. Brandegee 1892-6-26 Lassen Milford Comment
  UCR67469  Madia elegans George K. Helmkamp 1990-10-4 M 11 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  CHSC66375  Madia exigua Vernon H. Oswald; Lowell Ahart 1996-6-17 7806 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of the trail between Devils Corral Trailhead and the 6.0 mile post. 1420 Comment
  UC1567446  Madia exigua G. Schoolcraft 1989-6-7 1903 Lassen lower ne slopes Shaffer Mtn. 1432 Comment
  UC33229  Madia exigua M. S. Baker and F. Nutting 1894-7-2 Lassen Dixie Mts. Comment
  CHSC29911  Madia glomerata Robin L. Ondricek 1978-8-26 126 Lassen At roadside ca. .5 mi n of turn-off to ELFS on Hwy 139. 1493 Comment
  CAS-BOT-BC343056  Madia gracilis John Thomas Howell 1973-7-10 49781 Lassen Fredonyer Pass 1737 Comment
  CAS-BOT-BC343057  Madia gracilis John Thomas Howell 1974-7-10 50552 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC343059  Madia gracilis John Thomas Howell 1974-7-10 50552 Lassen Elysian Valley 1325 Comment
  JEPS17908  Madia gracilis Rimo Bacigalupi with G. T. Robbins 1955-7-21 5432 Lassen upper reaches of creek about 10 mi sw Susanville (along rd. over Diamond Mtn. ridge to Engelmine and Indian Valley); Gold Run Creek 1767 Comment
  POM37232  Malacothrix floccifera Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1616 Comment
  CHSC113089  Malva neglecta Lowell Ahart; John Dittes 2013-7-22 18877 Lassen East of a drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  JEPS124804 Image available Malva neglecta Peter Schultz 1967-7-2 172 Lassen 1 mile south of Milford city limit. Highway 395. Comment
  UC1594528  Marsilea oligospora Vernon H. Oswald and Lowell Ahart 1992-7-16 5126 Lassen between Old Station and Susanville (Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), 1 mi e of Willow Spring Rd. (Forest Rd. 31N56)) 1745 Comment
  UCD107430  Marsilea vestita Tim Kuhn 2006-7-25 13 Lassen Eagle Lake Ranger District. Comment
  CHSC99286  Matricaria discoidea Lowell Ahart; John Dittes 2008-6-20 14911 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS114749  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-22 15024 Lassen End of a levee, about 100 yards east of the tall poles, 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
  JEPS93831  Matricaria discoidea Vernon H. Oswald and Lowell Ahart 1998-6-4 9138 Lassen Red Rock Road at its junction with Highway 395 s of Constantia; Red Rock Road 1365 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
  CHSC7670  Medicago sativa Beverley J. Wise 1969-6-4 63 Lassen North edge of Milford on Hwy 395. 1249 Comment
  SCFS2169  Medicago sativa H. Naqui 1965-7-13 130 Lassen PCT dunes [?] bridge, Hwy 139 1402 Comment
  UC972185  Melica fugax Milo S. Baker 1952-5-23 12427 Lassen e of Chester (Highway 36) Comment
  UCD87270  Melica fugax Beecher Crampton 1960-6-18 5707 Lassen Lassen County (N.E.): southern Warner Mountain, Long Valley, 6 miles southeast of Jess Valleys. 2133 Comment
  CHSC112987  Melilotus officinalis Lowell Ahart; John Dittes 2013-7-22 18868 Lassen On the sides of the levee road, about 100 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC115596  Mentha arvensis Lowell Ahart; John Dittes 2015-7-14 20337 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  RSA0011454  Mentha arvensis Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46983 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CHSC1017  Mentzelia albicaulis C. Palmiter 1946-6-13 Lassen Spaulding's, Eagle Lake. 1554 Comment
  CHSC106171  Mentzelia albicaulis Lowell Ahart; John Dittes 2010-8-30 17089 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1274 Comment
  CHSC106683  Mentzelia albicaulis B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CHSC5298  Mentzelia albicaulis 1944-6-23 Lassen Eagle Lake. 1584 Comment
  CHSC60751  Mentzelia albicaulis Vernon H. Oswald; Lowell Ahart 1993-6-14 5536 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  HSC31748  Mentzelia congesta Donald Spalinger 1974-5-16 61 Lassen 300 yds. S of intersection of Rd. A3 and H 395 1250 Comment
  UC872458  Mentzelia dispersa C. L. Hitchcock 1940-5-26 6606 Lassen ca 12 m n Fall River Mills (Shasta Co.) (lava beds, On Fall River) 1371 Comment
  RSA719900  Mentzelia dispersa Michael A. Vincent, K. Levings 2006-7-29 12904 Lassen Along Rte. 36, 14.3 miles west of Susanville Comment
  SD130462  Mentzelia dispersa John Thomas Howell, Gordon H. True 1973-8-1 50204 Lassen The Sierra Nevada. Headwaters of Baxter Creek, Canadian Zone forest, east slope of Diamond Range south of Susanville. 2164 Comment
  HSC15839  Mentzelia laevicaulis Jim Vaughn 1956-8-17 Lassen Hwy. 36, 1 mi. W of Susanville. Comment
  JEPS124810 Image available Mentzelia laevicaulis G. R. Ostrander 1965-7-12 67 Lassen Growing along U.S. 395 15 miles N. of the junction of Calif. 70 and U. S. 395. Comment
  UC1121656  Mentzelia montana Robert W. Gardner 1937-6-18 G 22 Lassen Halls Flat Quadrangle, Burgess Spring Experimental Range Comment
  JEPS88323  Menyanthes trifoliata Vernon H. Oswald and Lowell Ahart 1996-6-24 7890 Lassen 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1), Modoc Plateau, Papoose Meadows); Modoc Plateau, Papoose Meadows 1633 Comment
  CHSC7717  Mertensia longiflora Beverley J. Wise 1969-5-3 3 Lassen 12 mi. N.E. of Susanville on Lass. Co. Rd. 216 off Las. Co. Rd. 215. On bank of Willow Creek. 1554 Comment
  CHSC61178  Micranthes aprica Vernon H. Oswald; Lowell Ahart 1993-5-12 5373 Lassen SW side of Hwy. 44, 0.9 mi NW of its intersection with A21 (to Westwood), at a large opening in the forest. 1737 Comment
  SD8380  Micranthes bryophora Mrs. R. M. Austin 1882-8-7 Lassen Kings Valley Comment
  CHSC68767  Micranthes nidifica Vernon H. Oswald; Lowell Ahart 1997-5-27 8499 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 margin of the flood plain of a small creek paralleling the road. 1546 Comment
  CAS-BOT-BC429184  Micranthes oregana John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49424 Lassen Elysian Valley, west of Janesville 1325 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
  SEINET10475172  Microseris nutans Mary Merello 1993-6-28 Merello 755 Lassen Lassen National Forest. At end of Forest Service Road 31N01 at lake. Pine woodland. 1740 Comment
  UC1136771  Microseris nutans L. R. Short 1936-6-1 S- 353 Lassen Lassen Forest 1859 Comment
  CAS-BOT-BC349302  Microseris nutans G. Schoolcraft 1993-6-29 2317 Lassen Ash Valley, 16 mi E. of Adin 1554 Comment
  CHSC6206  Microsteris gracilis C. Palmiter 1946-6-20 Lassen Grasshopper Valley. Eagle Lake. 1624 Comment
  UCR201716  Mimulus Ken Osborne 2005-4-23 s.n. Lassen 6 miles SE of Honey Lake, 1 mile west of Turtle Mountain 1276 Comment
  UC1776670 Image available Mimulus arvensis G. Schoolcraft 1994-7-6 2356 Lassen About 2 miles west of Boot Lake 2103 Comment
  UC1609131  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-6-28 5609 Lassen ne Poison Lake (n of Hwy. 44 on Rd. 33N06, nne of Burgess Meadow, sse flank of mtn.); Harvey Mtn. 1798 Comment
  UC1037226  Mimulus breweri Leo Whitney 1933-8-14 1596 a Lassen ca. 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  JEPS88205  Mimulus breweri Vernon H. Oswald and Lowell Ahart 1996-6-24 7866 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake, Modoc Plateau, Montane Meadow in Yellow Pine Forest, on the W side of the meadow ca. 0.2 mi S of the cabin. 1633 Comment
  UC1778583  Mimulus evanescens S. E. Schoenig 1998-7-5 98 -70 Lassen SW shore of Moll Reservoir, 2 meters from waters edge. 1499 Comment
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May 29 2009
  JEPS107802  Mimulus floribundus Lowell Ahart, John Dittes 2005-6-2 11970 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction 1408 Comment
  CDA41794  Mimulus guttatus T. C. Fuller 1961-5-17 6961 Lassen Hot springs, Wendell. 0 Comment
  JEPS23735  Mimulus inflatulus Rimo Bacigalupi with S. Galen Smith 1957-6-28 5989 Lassen 7.0 mi n of Madeline (about 1 mi n of Sage Hen siding on Southern Pacific Railroad, just e of U.S. Highway 395) 1676 Comment
  JEPS97419  Mimulus latidens Vernon H. Oswald and L. Ahart 1995-6-19 6887 Lassen T30N R15E NW1/4 SE1/4 Sect. 14, 4430 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 1.7 mi e of Hwy. 395 1350 Comment
  JEPS107380  Mimulus mephiticus Lowell Ahart, John Dittes 2005-6-1 11869 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UC1136833  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  UCD122771  Mimulus nanus S. E. Schoenig 1998-7-5 98- 72 Lassen by S side of Hwy 44 vicinity of Bogard campground. 1737 Comment
  LA95554  Mimulus nanus var. mephiticus Frank W. Peirson; 6853 Lassen Madeline Plain Comment
  UC1553406  Mimulus nanus var. nanus Gary Schoolcraft 1988-6-20 1813 Lassen 16 mi w Madeline; Ash Valley 1584 Comment
  HSC26596  Mimulus pygmaeus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19272 Lassen In Harvey Valley near Cone Springs Comment
  RSA536392  Mimulus pygmaeus Beth Corbin, Steve Klukkert 1991-6-11 622 Lassen Burgess Meadow drainage, 3/4 mile NE of Harvey Station, 7 miles NE of USFS Bogard Work Center. 1690 Comment
  HSC26594  Mimulus torreyi D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19161 Lassen 3 mi. N of Westwood Comment
  CAS-BOT-BC384031  Mirabilis laevis var. villosa M. Bourell 1997-5-31 5881 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  UC477503  Monardella glauca Geo. A. Fisher 1928-6-12 27 Lassen Lassen Forest 1615 Comment
  CHSC13637  Monardella odoratissima M. S. Taylor 1974-7-3 275 Lassen Abundant along roadsides ca. 5 mi s of Eagle Lake and Gallatin Beach. 1524 Comment
  CAS-BOT-BC221974  Monardella odoratissima subsp. glauca John Thomas Howell 1934-7-8 12487 Lassen Spalding's, Eagle Lake Comment
  GMDRC6951  Monardella odoratissima subsp. glauca J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31425 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  UC2035864  Monardella odoratissima subsp. glauca John Thomas Howell 1934-7-8 12487 Lassen Spalding's Eagle Lake Comment
  UCD18952  Monardella odoratissima subsp. glauca Raymond D. Ratliff 1965-8-5 44 Lassen Lassen National Forest, Harvey Valley Allot. (HV 20-14 'area'). 1725 Comment
  UC25488  Monardella odoratissima subsp. pallida M. S. Baker and Frank Nutting 1894-7-28 Lassen mts. s Eagle Lake Comment
  HSC14280  Monardella villosa D. E. Anderson 1963-8-25 2800 Lassen 3 mi. N of Cromberg along Hwy. Alt 40 1372 Comment
  JEPS107400  Monolepis nuttalliana Lowell Ahart, John Dittes 2005-6-1 11897 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  UC1136460  Monolepis nuttalliana A. Simontacchi 1940-6-8 843 Lassen Halls Flat Ranger Station Lassen Nat'l Forest, Halls Flat Quad., Halls Flat Ranger Sta Comment
  POM203792  Monolepis pusilla J. T. Howell 1934-6-10 11895 Lassen Horse Lake Comment
  JEPS87431  Montia chamissoi Vernon H. Oswald and Lowell Ahart 1993-6-14 5509 Lassen Lassen A21 (32N02) 7 air mi w Eagle Lake (5.3 mi e of Lassen 105 (32N28Y), near Summit Camp) 1889 Comment
  UC1567410  Montia chamissoi G. Schoolcraft 1989-7-18 1983 Lassen near Buck's Spring (s of Clark's Valley Road) 1874 Comment
  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
  HSC30029  Montia dichotoma D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19275 Lassen Harvey Valley near Cone Springs Comment
  CHSC64892  Montia fontana subsp. chondrosperma Vernon H. Oswald 1995-6-26 6925 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 7.1 mi w of Madeline. Locally abundant, forming mats on wet rocks in a shallow, roadside streamlet. 1712 Comment
  CHSC99533  Montia linearis Lowell 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
  UCD86529  Muhlenbergia asperifolia August L. Hormay 1932-8-12 s.n. Lassen Lassen National Forest. South E edge of Eagle Lake. Comment
  UC60840  Muhlenbergia filiformis M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  UC163551  Muhlenbergia jonesii Milo S. Baker Lassen Eagle Lake Comment
  POM114433  Muhlenbergia richardsonis Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  UC1024739  Muhlenbergia richardsonis Leo Whitney 1933-8-3 3042 Lassen ca 8 mi nw Eagle Lake (on open flats); Lassen National Forest, Slate Creek 1920 Comment
  UC1101591  Muhlenbergia richardsonis Malcolm A. Nobs and S. Galen Smith 1949-7-21 1060 Lassen 4 mi n Madeline (shallow marshy stream from springs) Comment
  UCD86988  Muhlenbergia richardsonis L. Whitney 1933-8-15 s.n. Lassen Near Slate Creek. 1905 Comment
  UCR197924  Muhlenbergia richardsonis Beecher Crampton 1954-7-6 2073 Lassen Modoc Plateau, 17 miles south of Ravendale along US highway 395. 1524 Comment
  SEINET4690286  Muhlenbergia richardsonis G. Schoolcraft 1999-6-30 2852 Lassen Small res. 1 mi. w. of Horne Ranch-12 mi. e. of Ravendale, CA., Susanville 1646 Comment
  CAS-BOT-BC515652  Muilla transmontana B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6599 Lassen U.S. Hwy. 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield. 1330 Comment
  CHSC71134  Muilla transmontana Vernon H. Oswald; Lowell Ahart 1998-5-22 9133 Lassen Near the summit of the dirt road in the Fort Sage Mtns. 3.5 mi east of Fort Sage Rd., ca. 6 mi NE of Doyle. 1737 Comment
  NY492639  Myosurus apetalus K. L. Chambers 1963-5-4 2026 Lassen Highway 395, 10 miles north of junction with Alt. Highway 40 (later renumbered as Highway 70). Comment
  UC1126100  Myosurus apetalus A. Simontacchi 1940-5-21 761 Lassen 4.1 mi e Blacks Mountain; Lassen National Forest 1737 Comment
  UC1609242  Myosurus apetalus Vernon H. Oswald and Lowell Ahart 1993-7-8 5651 Lassen 1.9 mi n ow Hwy 44, on se edge of Poison Lake (Pittville Road) 1709 Comment
  SEINET12093181  Myosurus apetalus M. J. Williams, Schoolcraft, G.; Tiehm, A. 1986-1 86- 38 -3 Lassen Tuledad Canyon Rd., from Duck Flat to Ravendale. 0.1 mi W of Calif-Nev line Comment
  UC1608993  Myosurus apetalus Vernon H. Oswald and Lowell Ahart 1993-5-12 5392 Lassen 0.6 mi e Shasta County Line (n side of Hwy 44, between Old Station and Poison Lake) 1645 Comment
  CAS-BOT-BC83319  Myosurus minimus Peter H. Raven; Otto Thomas Solbrig 1958-6-17 13285 Lassen Along United States Highway 395, 1.9 miles south of Ravendale. Comment
  CAS-BOT-BC83320  Myosurus minimus James Jokerst 1983-7-25 1890 Lassen Near Madeline Plains. 1614 Comment
  CHSC112462  Myosurus minimus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18726 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC118856  Myosurus minimus L. P. Janeway; B. Castro 2015-6-5 11769 Lassen Great Basin, Modoc Plateau. Along County Road 512 16.9 road-km south from Surprise Valley Road towards Tuledad Canyon; ina small northwestern drainage into Post Canyon; 2.3 air-km east-southeast of Little Hat Mountain. 1837 Comment
  CHSC54193  Myosurus minimus Vernon H. Oswald 1991-5-28 4621 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. On the beds of vernal pools east of the barn. 1264 Comment
  UCR153449  Myriophyllum sibiricum R. F. Thorne, C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir, Said Valley Reservoir: Near junction of Grasshopper Road and Highway 139 1646 Comment
  RSA338411  Myriophyllum spicatum Robert F. Thorne, C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir, near junction of Termo-Grasshopper Rd. & Hwy 139. 1433 Comment
  RSA17432  Nama aretioides Elmer I. Applegate 1934-5-4 8929 Lassen Secret Valley, 20 miles south of Ravendale. Comment
  CHSC71088  Nama aretioides var. californica Vernon H. Oswald; Lowell Ahart 1998-5-22 9105 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
  RSA0043136  Nama aretioides var. californica Christopher Davidson 1975-6-7 2760 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  JEPS29749  Nama aretioides var. multiflora Rimo Bacigalupi and L. R. Heckard 1962-5-28 8503 Lassen in area n of Honey Lake (2 mi e of Wendel Junction on road from U.S. 395 past Flanagan to Pyramid Lake, Nevada) 1219 Comment
  JEPS1373  Nama densa John G. Lemmon 1893-5-28 Lassen Susanville Comment
  SEINET10969184  Nama densa Mary Susan Taylor 1974-1 Taylor 305 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC735057  Nama densa var. parviflora Lincoln Constance 1946-7-3 3099 Lassen 7 mi n of Spaldings (northern edge of Eagle Lake); northern edge of Eagle Lake 1676 Comment
  CHSC64883  Navarretia breweri Vernon H. Oswald; Lowell Ahart 1995-6-19 6885 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.9 mi e of Hwy. 395, on the down-slope approaching Mud Flat. 1353 Comment
  HSC75910  Navarretia breweri D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19274 Lassen Harvey Valley near Cone Springs Comment
  SD3921  Navarretia breweri T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  RSA136592  Navarretia breweri David B. Dunn 1956-7-3 11921 Lassen On Highway 395. Comment
  UCD37483  Navarretia breweri Beecher Crampton 1960-6-21 5744 Lassen Lassen County, 15 miles northeast of Susanville, Horse Lake Mountain Range. 1706 Comment
  UC1192110  Navarretia intertexta Herbert L. Mason 1955-7-31 14644 Lassen near Westwood Junction Comment
  POM74488  Navarretia intertexta Marcus E. Jones 1897-7-1 10134 Lassen 7 miles south of Susanville at Perkin's Ranch 1524 Comment
  CHSC117294  Navarretia intertexta subsp. intertexta Lowell Ahart; John Dittes 2016-7-13 21131 Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC66252  Navarretia intertexta subsp. intertexta Vernon H. Oswald; Lowell Ahart 1996-6-24 7846 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
  HSC82196  Navarretia intertexta subsp. propinqua Thomas W. Nelson, Jane P. Nelson 1980-7-6 6051 Lassen Along Ash Creek at Ash Creek Campground 1494 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
  UC1184059  Navarretia intertexta subsp. propinqua Jean Langenheim 1957-6-22 4366 Lassen Said Valley, ne part of Lassen County Said Valley 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
  UCD48456  Navarretia intertexta subsp. propinqua G. L. Stebbins Jr. 1949-8-6 4001 Lassen Hog flat, NW of Susanville. 1676 Comment
  UCD48605  Navarretia intertexta subsp. propinqua John M. Tucker 1950-7-25 1977 Lassen On road from Pittville, 33 miles northwest of Susanville, Lassen County, California. Comment
  CHSC34344  Navarretia leucocephala subsp. minima K. R. Stern 1974-6-26 5868 Lassen E end of Champs Flat. Comment
  UC1112252  Navarretia leucocephala subsp. minima R. C. Bacigalupi with S. Galen Smith 1957-6-28 6002 Lassen 3.1 mi s Madeline (Highway 395); Madeline Plains 1615 Comment
  UC1537488  Navarretia leucocephala subsp. minima Gordon H. True Jr. 1936-6-25 528 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  UC23714  Navarretia leucocephala subsp. minima M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  UC1137773  Navarretia linearifolia subsp. linearifolia August L. Hormay 1934-7-2 Lassen Black's Mtn. Headquarters Lassen National Forest, Black's Mtn 1706 Comment
  SEINET10496833  Navarretia propinqua Mary Susan Taylor 1974-1 Taylor 277 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA67607  Navarretia sinistra Verne Grant, Alva Grant 1950-7-13 8941 Lassen Above Fredonyer Camp on road from Westwood to Susanville 1524 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
  CHSC93691  Nemophila parviflora var. austiniae Lowell Ahart; John Dittes 2005-6-1 11898 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  RSA122626  Nemophila parviflora var. austiniae L. R. Short, J. Warren 1936-6-9 S- 404 Lassen Burgess Spring Experiment Range. 1845 Comment
  SEINET5521095  Nemophila pedunculata N. H. Holmgren, P. K. Holmgren 1978-6-11 8911 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance 1680 Comment
  PASA2124  Nemophila spatulata Margaret Stason 1932-6-21 439 Lassen Devil's Kitchen, Lassen National Park Comment
  JEPS124374  Nepeta cataria Lowell Ahart, John Dittes 2015-7-13 20313 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UC1191769  Nicotiana acuminata var. multiflora Verne Grant and Irving Schneider 1947-9-7 8399 Lassen 0.5 mi w Litchfield (Susan River by Highway 395 at Bridge 7-34); Susan River 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
  CAS-BOT-BC349916  Nothocalais troximoides G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2309 Lassen Crest of range head of Stony Ridge, west of Milford 1930 Comment
  UC635505  Nuphar lutea subsp. polysepala Dorothy Tebbe 1929-7-30 132 Lassen in a pond near Lake Almanor Comment
  HSC31754  Oenothera cespitosa var. marginata Donald Spalinger 1974-5-16 65 Lassen E of Hurlong in the Doyle Winter Deer Range 1220 Comment
  JEPS124836 Image available Oenothera deltoides Laurie Hooker 1965-7-12 106 Lassen 2.6 miles past Milford on Highway 395. Comment
  JEPS124837 Image available Oenothera deltoides J. Yamanaka 1965-7-12 122 Lassen U. S. Highway 395, 2.6 miles N. of Milford Sandy soil. Comment
  UCD106858  Oenothera deltoides R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  CHSC36283  Oenothera deltoides subsp. piperi M. S. Taylor 1982-6-12 4652 Lassen Both sides of Hwy 395, ca. 1 mi n of Milford. 1280 Comment
  JEPS94105  Oenothera deltoides subsp. piperi Vernon H. Oswald and Lowell Ahart 1998-5-22 9095 Lassen Hwy. 395 at an intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  UC70345  Oenothera deltoides subsp. piperi Milo S. Baker 1890-1 Lassen Milford Comment
  POM38743  Oenothera deltoides subsp. piperi Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  SJSU10936  Oenothera deltoides subsp. piperi G. R. Ostrander 1965-7-12 70 Lassen by Hwy 395, 5 mi N of Doyle 1158 Comment
  NY998638  Oenothera deltoides var. piperi W. W. Eggleston 1911-9-3 7705 Lassen Vicinity of Doyle Station 1290 Comment
  HSC22961  Oenothera elata subsp. hirsutissima John Pratt 1970-7-18 77 Lassen 1 mi. E of Milford Comment
  RSA516978  Oenothera elata subsp. hookeri Barbara Ertter 1987-7-24 7304 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  SD64323  Oenothera tanacetifolia D. F. Howe 1966-8-25 Lassen 4.5 miles south of Alturas on Hwy #395. 1676 Comment
  UC157874  Olsynium douglasii var. douglasii Milo S. Baker 1890-1 Lassen Milford Comment
  CAS-BOT-BC350042  Oreostemma alpigenum var. andersonii Hans Leschke 1958-9-30 1571 Lassen Lassen Volcanic National Park. Grassy Swales 1935 Comment
  CAS-BOT-BC350045  Oreostemma alpigenum var. andersonii Alice Eastwood 1912-8-22 1899 Lassen Battle Creek Meadow, Lassen Butte Region Comment
  JEPS88402  Oreostemma alpigenum var. andersonii Vernon H. Oswald and Lowell Ahart 1996-8-1 8121 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi n Dyer Mtn. Lookout (ssw of Westwood) 1737 Comment
  UC831401  Oreostemma alpigenum var. andersonii A. A. Heller 1937-9-1 15343 Lassen 1 mi e Westwood 1524 Comment
  HSC93438  Oreostemma elatum Vernon H. Oswald 1996-8-1 8120 Lassen FS Rd. 28N56 (D-line), 2 mi. N of Dyer Mtn. Lookout, SSW of Westwood 1738 Comment
  CAS-BOT-BC499907  Orobanche fasciculata R. J. Dobbs 1928-5-23 s.n. Lassen Strawberry Pek switchback 1219 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
  SD7034  Orthocarpus copelandii var. cryptanthus Mrs. R. M. Austin 1882-8-9 Lassen Hills - near Hot Spring, Val. Comment
  SEINET3836941 Image available Orthocarpus cuspidatus subsp. copelandii Marcus E. Jones 1897-6-28 Lassen Diamond Mt., Susanville, Perkin's Ranch 2225 Comment
  CHSC60858  Orthocarpus cuspidatus subsp. cryptanthus Vernon H. Oswald; Lowell Ahart 1993-6-28 5604 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  UC172657  Orthocarpus cuspidatus subsp. cryptanthus Frank Stephens July, 1894 Lassen Bunch Grass Spring Comment
  SEINET12329637  Orthocarpus hispidus N. H. Holmgren, Holmgren, P. K. 1980-1 9483 Lassen US 395, 7.4 km S of Ravendale 1620 Comment
  UC1776707  Osmorhiza occidentalis G. Schoolcraft 1994-7-7 2447 Lassen About 1 mile W of Boot Lake 2407 Comment
  NY404460  Oxytheca dendroidea subsp. dendroidea G. Schoolcraft 1985-7-29 1493 Lassen West slopes of Fort Sage Mountains; 26-17-27 1585.0 Comment
  CHSC63381  Packera cana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6312 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  HSC69079  Packera cana Gary Schoolcraft 1979-7-11 143 Lassen S-face of Observation Peak 2317 Comment
  CHSC75465  Packera multilobata Vernon H. Oswald; Lowell Ahart 1999-6-9 9734 Lassen Hwy. 395 northeast of Susanville and north of Smoke Creek Ranch Rd. at Mud Flat. On the bank between the highway and the playa. 1348 Comment
  UC35992  Packera subnuda M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  UC485769  Paeonia brownii H. E. and S. T. Parks June, 1928 223 Lassen Drakesbad Lassen National Park Comment
  CAS-BOT-BC10387  Paeonia brownii J. T. Howell; Gordon H. True; Margaret Williams 1973-5-12 49158 Lassen In cemetary, Janesville 1295 Comment
  JEPS121279  Panicum Lowell Ahart, John Dittes 2013-7-23 18909 Lassen On the E side the gravel road, N-S road W of Big Canal, 0.76 Mile N of CA 299, 4.9 air miles NE of Bieber, Big Valley. Comment
  CHSC84341  Panicum capillare Lowell Ahart 2003-8-17 10517 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  UCD89524  Panicum capillare John Thomas Howell 1973-7-10 49795 Lassen Susanville. 1295 Comment
  CAS-BOT-BC253786  Panicum hillmanii John Thomas Howell 1973-7-10 49808 Lassen Doyle Comment
  CHSC77180  Pastinaca sativa G. Schoolcraft 1992-6-18 2242 Lassen About 1.8 miles east of Susanville on A27. 1261 Comment
  JEPS68204  Pectocarya penicillata W. L. Jepson 1918-8-2 7770 Lassen Beckwith Pass 1463 Comment
  SD6612  Pedicularis attollens Mrs. R. M. Austin 1882-8-9 Lassen Kings Valley Comment
  NY90883  Pedicularis attollens subsp. protogyna F. W. Pennell 1940-6-10 25771 Lassen Route 36. Road to Coppervale R. S., E of Westwood. Comment
  UC1567381  Pedicularis centranthera G. Schoolcraft 1989-5-3 1862 Lassen nw corner of Secret Valley 1356 Comment
  UCR267420  Pedicularis centranthera Jim Andre, Glenn L. Clifton 1993-6-14 30003 Lassen northeast base of Shaffer Mountain near Secret Creek, c. 20 mi east-northeast of Susanville 1646 Comment
  UC303057  Pellaea brachyptera Pearl Safford Lassen Susanville [uncertain locality] Comment
  SBBG66504  Penstemon deustus S. W. Hutchinson -Jun-1925 1075 Lassen Eagle Lake 1554 Comment
  SBBG85835  Penstemon deustus F. W. Pennell 1940-6-9 25768 Lassen below basaltic ridge, hill W of Susanville 1371 Comment
  SD77352  Penstemon deustus Francis W. Pennell 1940-6-7 25722 Lassen Route 299, 11 miles west of Nubieber 1096 Comment
  CHSC60779  Penstemon deustus var. pedicellatus Vernon H. Oswald; Lowell Ahart 1993-6-14 5513 Lassen Lassen A1 (Eagle Lake Rd.) 1.0 mi N of its jct. with Lassen A21 (32N02), on the W edge of Brockman Flat Lava Beds, ca. 4 mi (air) W of Eagle Lake. 1810 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
  NY591825  Penstemon deustus var. pedicellatus F. W. Pennell 1940-6-7 25722 Lassen Route 299, 11 miles west of Nubieber 1097.3 Comment
  CHSC29258  Penstemon gracilentus J. D. Prouty 1978-6-28 11 Lassen E of Eagle L., at W shore of Lower Dy L. Comment
  CHSC5912  Penstemon gracilentus R. Gein 1946-6-24 Lassen McCoy Flat. Eagle Lake. 1645 Comment
  JEPS11274  Penstemon gracilentus Brown and Wieslander 1922-7-23 43 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  JEPS94557  Penstemon gracilentus Vernon Oswald and Lowell Ahart 1997-6-24 8598 Lassen s of Susanville (on n side of Dianmond Mountain on Forest Road 29N43, 1.2 mi e of Gold Run Road (29N10)); Dianmond Mountain, Forest Road 29N43 1685 Comment
  UC1035884  Penstemon gracilentus Annie M. Alexander and Louise Kellogg 1946-8-13 5157 Lassen w side of Eagle Lake Comment
  UC1537436  Penstemon gracilentus Gordon H. True Jr. 1938-7-14 959 Lassen summit on Milford Grade , just on n slope (just on n slope) 1676 Comment
  HSC21014  Penstemon gracilentus M. T. Milligan 1964-7-16 142 Lassen 2 mi. W on the Silver Lake Rd., along Upper Susan River. 1829 Comment
  SEINET5328215 Image available Penstemon gracilentus G. Schoolcraft 1994-7-7 2370 Lassen about 1 mi W of Boot Lake 235 Comment
  CHSC68881  Penstemon heterodoxus var. heterodoxus Vernon Oswald 1997-6-24 8643 Lassen South of Susanville near the samll pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  SEINET5329197 Image available Penstemon heterophyllus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  NY603846  Penstemon humilis var. humilis N. H. Holmgren 1978-6-11 8927 Lassen Upper Smoke Creek, southeast side of Observation Peak, 11.3 km (7 miles) northeast of Rye Patch Canyon summit, 21 km (13 miles) airline distance east-southeast of Ravendale. 1700 Comment
  UC584356  Penstemon janishiae G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2282 Lassen summit and e slope Diamond Mt. 2194 Comment
  UC1537429  Penstemon laetus Gordon H. True Jr. 1936-6-25 530 Lassen e Harvey Ranger Station (Harvey Valley); , e of Harvey Ranger Station 1767 Comment
  RSA0065446  Penstemon laetus M. P. Harthill 1971-6-20 207 Lassen Ravendale. Comment
  POM195120  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen 2 miles east of Westwood. 1494 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
  SEINET11262107  Penstemon neotericus Karl A. Vincent, Charlotte A. Labbe 1986-7-19 4381 Lassen Sierra Nevada, Roop Mtn. Along CA A1 ca 4 mi NW of jct CA36, site ca 6 air mi WNW of Susanville.; 0 1737 Comment
  SEINET11262116  Penstemon neotericus Karl A. Vincent 1987-8-5 4499 Lassen Sierra Nevada, Roop Mtn. Along CA A1 ca 4 mi NW of jct CA 36, site ca 6 air mi WNW of Susanville.; 0 1737 Comment
  NY627253  Penstemon neotericus K. A. Vincent 1987-6-25 4435 Lassen Sierra Nevada, Goodrich Mountain, along CA 36, ca. 1 mile east of jct. CA A21 on east side of Westwood. 1524.0 Comment
  POM172676  Penstemon newberryi subsp. newberryi Franklin Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  CAS-BOT-BC383112  Penstemon newberryi var. newberryi Andrew Townesmith; Karen M. Meyer 2007-7-22 843 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 1980 Comment
  JEPS7228  Penstemon newberryi var. newberryi W. L. Jepson 1910-6-11 4116 Lassen Cinder Cone 2133 Comment
  NY640119  Penstemon procerus var. procerus N. H. Holmgren 1978-6-11 8914 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
  SEINET5323576 Image available Penstemon procerus var. procerus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  CHSC37349  Penstemon roezlii Jennifer Estep 1978-6-27 19 Lassen Dry L., E of Eagle L. 1645 Comment
  NY650094  Penstemon roezlii N. H. Holmgren 1978-6-11 8920 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
  NY650104  Penstemon roezlii J. T. Howell 1977-6-22 52402 Lassen North end of Eagle Lake 1585.0 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
  UC1924214  Penstemon roezlii Debra Valov 2004-6-9 2004269 Lassen Hwy 139 c. 1 km S of Junction of County A2 1356 Comment
  UC887288  Penstemon roezlii A. A. Heller 1938-6-23 15195 Lassen e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  NY650106  Penstemon roezlii D. W. McNeal 1983-6-5 2837 Lassen On a road bank beside Highway #395, 9.2 miles north of the Plumas Co. line. Comment
  CAS-BOT-BC239493  Penstemon rydbergii var. oreocharis A. M. Vollmer; L. Beane 1953-7-1 78 Lassen Along Halls Flat road beginning 6 miles west of Susanville to McArthur 1554 Comment
  CAS-BOT-BC239502  Penstemon rydbergii var. oreocharis Al Simontacchi 1940-6-3 792 Lassen Lassen National Forest, 8.3 miles SE of Alcohol Jacks Cabin 1706 Comment
  CAS-BOT-BC239505  Penstemon rydbergii var. oreocharis James Jokerst 1983-7-25 1895 Lassen Near Madeline Plains 1614 Comment
  CAS-BOT-BC239508  Penstemon rydbergii var. oreocharis H. D. Ripley; R. C. Barneby 1943-6-13 5706 Lassen 8 miles S. of Milford 1859 Comment
  CHSC12939  Penstemon rydbergii var. oreocharis K. R. Stern 1974-6-26 5869 Lassen E end of Champs flat. Comment
  NY650948  Penstemon rydbergii var. oreocharis H. D. D. Ripley 1943-6-13 5706 Lassen 8 miles south of Milford 1859.3 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
  RSA59553  Penstemon rydbergii var. oreocharis E. K. Balls 1950-5-22 14830 Lassen 0.5 mi N of turnoff to Heir, Hwy 395, between Milford and Doyle. 1280 Comment
  UC54980  Penstemon rydbergii var. oreocharis J. B. Davy Lassen Amedee Comment
  UCSB6193  Penstemon rydbergii var. oreocharis Heller, A. 1938-6-23 Lassen East of Westwood 1493 Comment
  CHSC23549  Penstemon speciosus W. O. Baum 1971-6-28 25 Lassen S. slope of Gallatin Peak. 2042 Comment
  CHSC4438  Penstemon speciosus K. R. Stern 1967-6-30 2449 Lassen West Central side of Eagle Lake. 1554 Comment
  HSC81485  Penstemon speciosus Thomas W. Nelson, Jane Nelson 1980-7-6 6018 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir. 1585 Comment
  JEPS29738  Penstemon speciosus Rimo Bacigalupi and L. R. Heckard 1962-5-28 8493 Lassen along U.S. highway 395, 10 mi s Milford; s of Milford 1219 Comment
  UC1226034  Penstemon speciosus Arthur Cronquist, Arthur H. Holmgren 1959-6-16 8455 Lassen 26 mi nw Reno; nw of Reno Comment
  NY660833  Penstemon speciosus F. W. Pennell 1940-6-10 25786 Lassen Route 36, 3 miles northwest of Westwood 1645.9 Comment
  UC1012214  Penstemon speciosus Francis W. Pennell 1940-7-23 26254 Lassen Route 395, 2 mi n of junction with Route #24 (ne of Plumas); ne of Plumas 1524 Comment
  CAS-BOT-BC239662  Penstemon sudans John Thomas Howell 1977-6-22 52404 Lassen West of Susanville near the confluence of Willard Creek and Susan River 1432 Comment
  SEINET5323637 Image available Penstemon sudans G. Schoolcraft 1998-7-14 2761 Lassen In rimrock NE of Shaffer Mtn 1356 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
  CAS-BOT-BC211251  Perideridia Louella Bass 1976-1-1 158 Lassen Elysian Valley Comment
  CHSC29932  Perideridia bolanderi Robin Ondricek; Wesley Dempsey 1978-6-7 43 Lassen Lower Dry Lake. 1706 Comment
  CHSC7747  Perideridia bolanderi Beverly J. Wise 1969-5-18 114 Lassen 15.9 mi. East of Susanville on Las. Co. Rd. 216 of Las. Co. Rd. 215. 1554 Comment
  JEPS107969  Perideridia bolanderi Lowell Ahart, John Dittes 2005-6-1 11916 Lassen Along a small wash, on the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  UC1087229  Perideridia bolanderi subsp. bolanderi Peter H. Raven and Otto T. Solbrig 1958-6-16 13252 Lassen 4.5 mi e Westwood Comment
  SEINET5320866  Perideridia bolanderi subsp. bolanderi Unknown 1968-6-3 2882 Lassen Northeast of Litchfield; North of Honey Lake, west side of Highway 395, 7.4 miles northeast of Litchfield. Near historical marker about emigrants and approximately 500 feet north of it Comment
  JEPS117580  Perideridia lemmonii Lowell Ahart, John Dittes 2010-7-31 16991 Lassen On the south side 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
  UC1390005  Perideridia oregana T. I. Chuang and F. Gleason 1963-8-22 5923 Lassen on Hwy 299 0.6 mi se Bieber Comment
  UC1523773  Perideridia oregana Gary Schoolcraft 1971-7-13 503 Lassen near Silva Flat 1719 Comment
  UC20876  Perideridia oregana Milo S. Baker 1893-7-3 Lassen Big Valley Comment
  CAS-BOT-BC222762  Perideridia parishii Clare B. Hardham 1971-8-22 18397 A Lassen Diamond Mountain 2133 Comment
  HSC103641  Perideridia parishii subsp. latifolia Thomas W. Nelson, Jane Nelson 1985-8-10 8017 Lassen Along north side of Silver Lake 1829 Comment
  SEINET3088961 Image available Peritoma platycarpa N. H. Holmgren, Patricia K. Holmgren 1978-6-11 8928 Lassen Upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale. 1700 Comment
  CAS-BOT-BC413480  Persicaria amphibia L. S. Smith 1918-7-22 1006 Lassen Modoc National Forest. Blue Lake 1874 Comment
  JEPS25529  Phacelia adenophora Rimo Bacigalupi with Lincoln Constance 1959-6-16 7143 Lassen US Hwy 395 1/4 mi s junction of road to Smoke Creek (playa beside road) 1341 Comment
  OBI48096  Phacelia adenophora Rhonda Riggins 1989-4-27 1643 Lassen US 395, 14 mi N Litchfield, 21 mi S Ravendale 1311 Comment
  RSA38635  Phacelia adenophora P. A. Munz 1947-5-19 11881 Lassen Madeline 1677 Comment
  UC1226488  Phacelia adenophora Arthur Cronquist and Arthur H. Holmgren 1959-6-17 8479 Lassen along roadside 1 mi s Ravendale (40 mi ne of Susanville) 1615 Comment
  RSA487940  Phacelia adenophora Arnold Tiehm, Jan Nachlinger, Margaret J. Williams 1988-6-2 11701 Lassen South side of Shaffer Mountain, 3.4 miles north of the Wendel road on Hwy 395 from Susanville to Alturas, west of the highway. 1387 Comment
  SEINET5536525  Phacelia adenophora G. Schoolcraft 1980-6-5 252 Lassen Northeast side of Snowstorm Mtn. 1585 Comment
  RSA22955  Phacelia bicolor Elmer I. Applegate 1934-5-4 8928 Lassen South of Secret Valley. Comment
  CHSC91316  Phacelia bicolor var. bicolor Lowell Ahart; John Dittes 2005-6-1 11886 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1433 Comment
  CHSC48469  Phacelia glandulifera Vernon Oswald 1986-5-28 2056 Lassen Road 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  JEPS78146  Phacelia hastata Gary W. Zamzow 1972-7-19 89 Lassen Hwy 139 15 mi s Adin; Willow Creek campground 1524 Comment
  CDA40427  Phacelia hastata subsp. compacta L. Ahart, J. Dittes 2005-6-2 11950 Lassen Along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, Long Valley, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. Comment
  GMDRC6948  Phacelia hastata subsp. hastata J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31421 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  RSA0093392  Phacelia hastata var. hastata Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31421 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  HSC82267  Phacelia heterophylla Thomas W. Nelson, Jane P. Nelson 1980-7-6 5999 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  CHSC93673  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11983 Lassen North side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1410 Comment
  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
  RSA638996  Phacelia heterophylla subsp. virgata Michael A. Vincent 1999-6-9 8585 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
  SJSU14069  Phacelia heterophylla subsp. virgata W. Savage 1964-6-30 335 Lassen E of Susanville 1310 Comment
  CHSC26178  Phacelia humilis J. P. Kroessig 1977-5-25 35 Lassen At Eagle Lake Biological Station, ca. 37 km nnw of susanville. 1570 Comment
  UC1259992  Phacelia humilis Jeffrey Huber 1971-6-2 111 Lassen on CA Hwy 139 approx. 30 mi n Susanville 1645 Comment
  SD61075  Phacelia humilis Darley F. Howe 1964-8-1 3914 Lassen Modoc Natl. Forest, Warner Mts., 4.8 mi. from Harvey Creek on ridge road. 2133 Comment
  JEPS95000  Phacelia humilis var. humilis Vernon Oswald and Lowell Ahart 1997-6-24 8620 Lassen 2.7 mi e of Lassen National Forest boundary (7.4 mi e of Gold Run Road (29N10), s of Susanville on n side of Diamond Mountain at an impoundment on the edge of Forest Road 29N43); Diamond Mountain, Forest Road 29N43 2036 Comment
  RSA122630  Phacelia humilis var. humilis L. R. Short 1936-5-22 S- 351 Lassen Burgess Spr. Exp. Range. 1837 Comment
  UCD120530  Phacelia humilis var. humilis Beecher Crampton 1960-6-18 5728 Lassen N.E. part of county; southern Warner Mtns., vicinity Blue Lake Ranch. Comment
  RSA427992  Phacelia humilis var. humilis Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CHSC12417  Phacelia linearis Anne Linda Brisk 1969-6-25 20 Lassen Growing behind Shepherd's Hall at ELBS. 1554 Comment
  CHSC60748  Phacelia linearis Vernon H. Oswald; Lowell Ahart 1993-6-14 5532 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd.518, 33N89). 1566 Comment
  CHSC93235  Phacelia linearis John Dittes; Scott Chamberlain 2004-6-28 1009 Lassen Modoc Plateau; Long Valley; ca. 1.8 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 1.0 air-mile east of Plumas County line. 1460 Comment
  NY998462  Phacelia linearis N. H. Holmgren 1980-7-4 9501 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 Comment
  UC24433  Phacelia linearis Mrs. R. M. Austin Jun. 1894 Lassen Willow Creek Comment
  UCD20363  Phacelia linearis Joe DiTomaso 2002-6-4 s.n. Lassen Lassen County, about 3 miles northwest of the junction between Nevada, Modoc and Lassen counties. Study plots near Susanville. Comment
  NY1056441  Phacelia lutea var. glandulifera P. A. Munz 1947-5-19 11871 Lassen 19 miles south of Ravendale 1341 Comment
  NY1056499  Phacelia lutea var. lutea M. J. Williams 1986-5-12 86- 21 --1 Lassen Smoke Creek Road, east of Highway 395 1448 Comment
  CAS-BOT-BC134047  Phacelia mutabilis John Thomas Howell 1977-6-22 52400 Lassen north end of Eagle Lake 1584 Comment
  JEPS4041  Phacelia mutabilis Frances D. Payne 1929-7-12 85 Lassen ridge above Lost Lake; Warner Mountains 2438 Comment
  CHSC59552  Phacelia ramosissima var. ramosissima M> Meyer 1980-7-8 514 Lassen Amongst rocks (lg.) and junipers on top of Grasshopper Ridge. 1724 Comment
  NY1056748  Phacelia tetramera A. Tiehm 1986-5-12 10349 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  UCD88537  Phalaris arundinacea R. Tofsrud 1947-7-20 257 Lassen Near Pittville. Comment
  SJSU5104  Phleum pratense H. L. Buckalew 1961-7-9 Lassen near lake shore, Blue Lake, Warner Mts 1828 Comment
  RSA0068847  Phlox Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  RSA647573  Phlox longifolia Marion P. Harthill 1971-6-21 226 Lassen Ravendale Comment
  CHSC91202  Phlox speciosa subsp. occidentalis Lowell Ahart; John Dittes 2005-6-2 11928 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  JEPS29740  Phlox speciosa subsp. occidentalis Rimo Bacigalupi, and L. R. Heckard 1962-5-28 8495 Lassen 2.7 mi n Milford (along U.S. Highway 395) 1219 Comment
  UC932052  Phlox stansburyi Verne Grant and Alva Grant 1947-5-5 7979 Lassen n of Honey Lake Valley 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
  UC21954  Phyllodoce breweri M. S. Baker and Frank Nutting 1894-7-20 Lassen Silver Lake Comment
  CHSC60805  Pilularia americana Vernon H. Oswald; Lowell Ahart 1993-6-28 5623 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. 1737 Comment
  CHSC23508  Pinus jeffreyi Wayne O. Baum 1971-7-16 71 -74 Lassen E. slope of Gallatin Peak. 2072 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
  JEPS46865  Pinus ponderosa G. M. Homans 1914-1-13 Lassen Big Mdws. Comment
  NY951542  Pinus ponderosa var. ponderosa D. H. Goldman 2004-11-6 2941 Lassen Along the N side of Forest Road 32N08, just N of Pine Creel Valley and about 1.8 miles E of the intersection with Rt. 44. Crater Lake Mountain, Lassen National Forest 1725 Comment
  SEINET3874938  Pinus washoensis David A. Charlet 1994-7-6 1924 Lassen Madelin Mesa foothills above Madeline plains.; 0 1689 Comment
  UC1951062  Plagiobothrys Debra Valov 2007-5-22 2007086 Lassen Bieber, ca. 12 km east of Hwy 299 via County Rd A2. Comment
  RSA123889  Plagiobothrys bracteatus A. Simontacchi 1940-5-14 715 Lassen 10.2 miles east of Coyote Springs 1700 Comment
  JEPS28716  Plagiobothrys cognatus George W. Gillett 1957-7-29 954 Lassen Snag Lake Lassen Volcanic National Park (shoreline near e inlet) 1850 Comment
  JEPS28801  Plagiobothrys cognatus George W. Gillett 1957-9-4 1127 Lassen Widow Lake Lassen Volcanic National Park (e margin of lower lake, near inlet) 2072 Comment
  CHSC99538  Plagiobothrys cusickii Lowell Ahart; John Dittes 2008-6-20 14914 Lassen In vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  RSA0035913  Plagiobothrys cusickii Lowell A. Ahart, John Dittes 2008-6-20 14914 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
  CHSC112431  Plagiobothrys hispidulus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18776 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
  CHSC113067  Plagiobothrys hispidulus Lowell Ahart; John Dittes 2013-7-22 18854 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
  CHSC60726  Plagiobothrys hispidulus Vernon H. Oswald; Lowell Ahart 1993-6-14 5510 Lassen Junction of Lassen A1 (Eagle Lake Rd.) with Lassen A21 (32N02), ca. 3 mi (air) W of Eagle Lake. Roadside depression. 1813 Comment
  CHSC66237  Plagiobothrys hispidulus Vernon H. Oswald; Lowell Ahart 1996-6-24 7861 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. At the interface between meadow and forest on the W side of the meadow ca. 0.4 mi S of the cabins. 1633 Comment
  UC1609215  Plagiobothrys hispidulus Vernon H. Oswald and Lowell Ahart 1993-6-14 5510 Lassen ca 3 mi (air) w. Eagle Lake (junction of Lassen A1 (Eagle Creek Rd.) with Lassen A21 (32N02)) 1813 Comment
  CAS-BOT-BC224969  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  CAS-BOT-BC224970  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  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
  POM71640  Plagiobothrys scouleri var. hispidulus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC117287  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2016-7-15 21217 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1261 Comment
  POM89198  Plagiobothrys tenellus Milo S. Baker 1890-1 s.n. Lassen Milford. Comment
  RSA0086588  Plantago Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  SD7498  Platanthera sparsiflora Mrs. R. M. Austin 1880-1 Lassen No further locality information given on label on specimen sheet. Comment
  POM260454  Plectritis congesta subsp. brachystemon C. Leo Hitchcock 1940-5-26 6604 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  SEINET10464991  Plectritis congesta subsp. brachystemon Mary Susan Taylor 1982-5-7 Taylor 4426 Lassen T22N R17E n/nw sec 5. Beckwourth Pass quad. Reno Jct and along old road paralleling Hwy 70, just e of Beck- wourth Pass, ca. 1/4 mi w of Hallelujah Jct on Hwy 395. Sagebrush Scrub; 5000 ft. 1524 Comment
  CHSC4942  Plectritis macrocera W. Lessig 1967-5-23 16 Lassen Coll. ca. 200 yds. ne of Eagle Lake Biology Station. 1524 Comment
  CHSC4992  Plectritis macrocera L. E. Ray 1967-6-23 48 Lassen Collected ca. 200 yds, ne of ELBS. 1524 Comment
  CHSC64854  Plectritis macrocera Vernon H. Oswald 1995-6-26 6942 Lassen Modoc Plateau. Spooner Rd. ca. 0.3-0.4 mi e of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  SEINET8658736  Plectritis macrocera C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  HSC63959  Plectritis macrocera Teresa Prendusi 1980-5-19 Lassen Saddle Rock. 1524 Comment
  CHSC31979  Pleiacanthus spinosus L. Ahart 1974-7-9 547 Lassen Along Hwy 395, 1 mi n of jct of Hwys 395 and 70. 1524 Comment
  UC1031352  Poa Leo Whitney 1935-6-26 3367 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  CAS-BOT-BC254946  Poa bulbosa R. E. Frenkel 1964-7-12 665 Lassen On California Highway 299, 1.5 miles W of Bieber 1249 Comment
  UCD90701  Poa bulbosa F. H. Taylor 1932-5-1 s.n. Lassen India Valley. Comment
  CAS-BOT-BC255033  Poa compressa John Thomas Howell 1974-7-10 50553 Lassen Elysian Valley 1325 Comment
  CHSC77269  Poa cusickii subsp. cusickii G. Schoolcraft 1994-7-7 2351 Lassen About 1.5 miles NE of Red Rock Lake. 2042 Comment
  JEPS107793  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
  UC1024814  Poa cusickii subsp. cusickii Leo Whitney 1935-6-19 3265 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1583964  Poa fendleriana subsp. longiligula G. Schoolcraft 1990-5-16 2054 Lassen ca 1 mi w Muck Valley 1280 Comment
  HSC10766  Poa pratensis M. T. Milligan 1964-7-16 131 Lassen 2 mi. W on Silver Lake Rd., along Upper Susan River 1829 Comment
  SEINET7850259  Poa pratensis B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11508 Lassen Blue Door Flat, 7 or 8 mi. E of Highway 295, on county road 510. 1774 Comment
  UC2046021  Poa pratensis Barbara L. Wilson with Danna Lytjen and Nick Otting 2005-7-29 11508 Lassen Blue Door Flat, seven or eight miles east of Highway 295 on county road 510. Comment
  JEPS126508  Poa secunda Alejandro Brambila, Michael Dolan 2016-7-7 CA 320 -157 Lassen Ash Valley road 1 mi past Holbrook Reservoir. Comment
  POM180946  Poa secunda P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia. Comment
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Jan 6 2015
  UCD90322  Poa secunda A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3365 Lassen Nubieber. Comment
  SJSU15450  Poa secunda subsp. juncifolia John Rawlings, Sara Timby 2014-6-15 1265 Lassen In and around BLM campground at north end of Eagle Lake. 1580 Comment
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Feb 18 2015
  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
  UC699670  Poa secunda subsp. juncifolia Gus Hormay 1944-7-2 Lassen Halls Flat Comment
  UCD92381  Poa secunda subsp. juncifolia P. B. Kennedy 1901-6-10 s.n. Lassen Constantia. Comment
  UCD92427  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-26 s.n. Lassen Near Fruit Grower's Supply Co., Camp 10. Comment
  HSC10738  Poa secunda subsp. secunda R. S. White 1965-5-15 74 Lassen 10 mi. W of Susanville on Hwy. 36 Comment
  RSA715613  Poa secunda subsp. secunda L. 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. 1449 Comment
  SEINET7294129 Image available Poa secunda subsp. secunda John Thomas Howell, Gordon H. True; Margaret Williams 1973-1 49197 Lassen In open yellow pine forest, Elysian Valley northwest of Janesville. 1326 Comment
  UC1024680  Poa secunda subsp. secunda Leo Whitney 1934-7-12 2166 Lassen 5 mi w of lower end Eagle Lake (summit of Antelope Mt); Lassen Nat'l Forest 2286 Comment
  UC1024841  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3213 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC584341  Poa secunda subsp. secunda G. L. Stebbins Jr. and J. A. Jenkins 1937-7-11 2322 Lassen ca 1 mi below summit Black Mt 1940 Comment
  UCD91638  Poa secunda subsp. secunda A. L. Hormay 1941-6-26 37 Lassen Lassen National Forest. Pine Creek, Bogard Ranger Station. 1706 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
  UC1483864  Polemonium micranthum M. Meyer 1980-5-1 Lassen e Horse Lake Road (s of Ravendale); , e of Horse Lake Road 1645 Comment
  SD61072  Polemonium occidentale Darley F. Howe 1964-8-2 3918 Lassen East Creek, Warner Mountains, Modoc Natl. Forest 2012 Comment
  UC449772  Polemonium occidentale Franklin P. Nutting 1894-7-28 Lassen Bridge Creek Bridge Creek (Northern California) Comment
  NY182333  Polyctenium fremontii H. D. D. Ripley 1944-5-30 5970 Lassen South of Ravensdale. 1691.6 Comment
  SEINET10838602  Polyctenium fremontii Arnold J. Tiehm 1988-6-2 Tiehm 11703 Lassen 6.6 mi. N. Of the wendel rd on hwy 395 from susanville to alturas, mud flats along the hwy, t30n, r15e, sec 15. Plants growing with artemesia ant the edge of silty flats which were inundated earlier in the year. Petals white to pink. Comment
  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
  HSC24811  Polygala subspinosa D. H. Norris, F. J. Hermann 1972-5-17 22633 Lassen Deep canyon 18 mi. N of Litchfield on Hwy. 395 (milepost 94.6) Comment
  HSC63730  Polygala subspinosa Teresa Prendusi 1980-5-19 Lassen Slope above Secret Creek Canyon 1433 Comment
  NY1002472  Polygala subspinosa H. D. D. Ripley 1943-6-15 5760 Lassen East of Viewland 1311 Comment
  JEPS50529  Polygonum amphibium var. emersum W. L. Jepson 7997 a Lassen Grasshopper Valley 1615 Comment
  CAS-BOT-BC419771  Polygonum argyrocoleon Alice Eastwood 1912-8-22 1795 Lassen Trail from Morgans Springs to Sulphur Works, Lassen Butte Region Comment
  CAS-BOT-BC413932  Polygonum aviculare subsp. aviculare John Thomas Howell 1973-7-10 49796 Lassen Susanville 1295 Comment
  UCD33604  Polygonum californicum Beecher Crampton 1970-6-26 8637 b Lassen Lassen County, ca. 5 miles west of Susanville. 1524 Comment
  RSA518872  Polygonum davisiae Barbara J. Ertter 1988-7-25 7863 Lassen ridge of Diamond Mts, 1.5 miles E of Diamond Peak, 10 air miles due S of Susanville. 2287 Comment
  CHSC106091  Polygonum douglasii subsp. douglasii Lowell Ahart; John Dittes 2010-7-31 16978 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
  JEPS117591  Polygonum douglasii subsp. douglasii Lowell Ahart, John Dittes 2010-7-31 16978 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
  CHSC58849  Polygonum douglasii subsp. spergulariiforme Vernon H. Oswald; Lowell Ahart 1992-7-16 5125 Lassen Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), 1.0 mi E of Willow Spring Rd. (Forest Rd. 31N56), between Old Station and Susanville. 1745 Comment
  CHSC84438  Polygonum douglasii subsp. spergulariiforme Lowell Ahart 2003-8-17 10515 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  UC1594644  Polygonum douglasii subsp. spergulariiforme Vernon H. Oswald and Lowell Ahart 1992-7-16 5125 Lassen Bridge Creek Spring Rd. (County Rd 112, Forest Rd. 31N06) 1.0 mi e Willow Spring Road (Forest Rd. 31N56) (between Old Station and Susanville) 1745 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
  UC1603213  Polygonum polygaloides J. Guardino 1993-5-22 167 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CAS-BOT-BC419856  Polygonum polygaloides subsp. confertiflorum James Jokerst 1983-7-24 1883 Lassen Near Madeline Plains. 1614 Comment
  CAS-BOT-BC419857  Polygonum polygaloides subsp. confertiflorum John Thomas Howell 1976-7-20 52031 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  JEPS28647  Polygonum polygaloides subsp. confertiflorum George W. Gillett 1957-7-22 874 Lassen near s shore of Snag Lake, Lassen Volcanic National Park Snag Lake Snag Lake; Lassen Volcanic National Park, Snag Lake 1850 Comment
  JEPS87370  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald and Lowell Ahart 1993-8-3 5748 Lassen e Silver Lake (just e of Caribou Wilderness, ca 13 air mi n of Lake Almanor); Cooper Swamp 1932 Comment
  CHSC58507  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald 1992-7-3 5047 Lassen Lassen Volcanic National Park. Trail from Juniper L. to Cameron Meadow, between the trail to Jakey L. and the trail to Horseshoe L. 1981 Comment
  CHSC99128  Polygonum polygaloides subsp. kelloggii Lowell Ahart; John Dittes 2008-6-19 14897 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC1136191  Polygonum polygaloides subsp. kelloggii A. Simontacchi 1940-5-21 760 Lassen 4.1 mi sse Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC773864  Polygonum polygaloides subsp. kelloggii L. R. Short and Wm. Gansberg 1936-6-8 S- 390 Lassen Burgess Spring Experimental Range Lassen <National> Forest 1743 Comment
  CHSC27647  Polygonum sawatchense subsp. sawatchense N. E. Heiken 1978-7-5 72 Lassen S. of Eagle L., E shore of Mahogany L. 2060 Comment
  CAS-BOT-BC420157  Polygonum sawatchense subsp. sawatchense Clarence R. Quick 1961-6-21 61 -18 Lassen Adjacent to Road 21, Blacks Mountain Expermental [Experimental] Forest, northeast of Lassen Peak 1798 Comment
  CAS-BOT-BC420159  Polygonum sawatchense subsp. sawatchense G. Schoolcraft 1988-6-15 1814 Lassen Ash Valley RNA/ACEC 16 miles east of Adin 1584 Comment
  JEPS70696  Polypogon monspeliensis W. L. Jepson 1918-8-2 7771 Lassen Beckwith Pass 1463 Comment
  RSA129377  Polypogon monspeliensis H. S. Yates 1936-8-11 6054 Lassen Near Red Rock. 1341 Comment
  CHSC5224  Porterella carnosula R. Gein 1946-6-11 Lassen Near Aspen Grove, Eagle Lake. 1615 Comment
  JEPS28708  Porterella carnosula George W. Gillett 1957-7-29 938 Lassen near w end Widow Lake (Widow Lake, Lassen Volcanic National Park); Lassen Volcanic National Park, Widow Lake 2072 Comment
  SEINET10460819  Porterella carnosula G. Ledyard Stebbins 1949-8-6 Stebbins 4002 Lassen Edge of Feather Lake, between Susanville and McArthur. Mud flats 1676 Comment
  SEINET10460824  Porterella carnosula Peter H. Raven 1958-6-17 Raven 13294 Lassen Adobe fields along United States Highway 395, 4.8 miles south of Madeline Comment
  SEINET10460830  Porterella carnosula Noel H. Holmgren, Patricia K. Holmgren 1978-6-10 Holmgren 8901 Lassen Madeline Plains, Coyote Flat, 14.5 km (9 mi) east-northeast of Termo and 13 km (8 mi) airline distance. T35N R15ES7 1630 Comment
  CHSC4850  Potamogeton R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  JEPS97332  Potamogeton filiformis Vernon H. Oswald 1995-8-26 7219 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Lake in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  JEPS103226  Potamogeton nodosus G. Schoolcraft 1996-9-11 2563 Lassen Willow Creek below petroglyphs above dam 1341 Comment
  UC1100077  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-7-30 8196 Lassen w end of Tule Lake Comment
  SEINET3893473  Potamogeton pusillus Arnold Tiehm, Gary Schoolcraft 1984-8-14 9247 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line.; 0 1698 Comment
  CHSC55814  Potamogeton richardsonii Vernon H. Oswald 1991-9-23 4876 Lassen Lassen Volcanic National Park. Butte Lake in the northeast corner of the park. At the first spit of land extending into the lake south of its outlet. 1841 Comment
  POM312882  Potentilla biennis Verne Grant 1947-7-30 8189 Lassen South point of west embayment, Tule Lake. Comment
  UC12514  Potentilla breweri M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  CHSC89733  Potentilla gracilis var. fastigiata L. P. Janeway 2004-6-26 8159 Lassen High Cascade Range. At Patterson Well in Patterson Flat; Blacks Mountain Experimental Forest. 1767 Comment
  JEPS44214  Potentilla gracilis var. fastigiata G. S. Crew 1927-7-1 48 Lassen Bogard Ranger Station pasture Lassen National Forest, Bogard Ranger Station pasture (sw Lassen County) 1712 Comment
  NY832928  Potentilla gracilis var. fastigiata B. M. Bartholomew 1988-6-25 4373 Lassen Long Valley, southern end of the Warner Mountains 2080 Comment
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley Comment
  CAS-BOT-BC540365  Potentilla gracilis var. fastigiata Louella Bass 1973-5-29 49 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC540368  Potentilla gracilis var. fastigiata David D. Keck 1930-7-23 956 b Lassen 3 miles east of Westwood 1524 Comment
  CAS-BOT-BC158476  Potentilla gracilis var. gracilis A. M. Vollmer; L. Beane 1953-7-1 81 Lassen Along Halls Flat road beginning 6 miles west of Susanville to McArthur 1554 Comment
  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
  CHSC4758  Potentilla millefolia R. Carter 1967-7-14 614 Lassen Hog Flat Reservoir, between highway 92 and shore of reservoir. Comment
  UC1128271  Potentilla millefolia A. Simontacchi 1940-5-17 743 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  CHSC66731  Potentilla rivalis Vernon H. Oswald; Lowell Ahart 1996-8-1 8103 Lassen Mountain Meadows Reservoir SW of Westwood. In forest bordering the lake NE of Indian Ole Dam. 1539 Comment
  UCR67033  Potentilla rivalis George K. Helmkamp 1990-10-4 M- 3 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  SDSU9858  Primula tetrandra D. F. Howe 1964-7-31 3899 Lassen Warner Mtns. Modoc National Forest. 1890 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
  RSA60357  Prunus andersonii E. K. Balls 1950-5-9 15947 Lassen 6 miles south of Doyle, Hwy 395. 1372 Comment
  SJSU8180  Prunus andersonii M. D. Fleschner 1965-7-12 Lassen 2 mi SE of Milford near Honey L 1249 Comment
  CHSC23560  Prunus virginiana var. demissa W. O. Baum 1971-7-6 34 Lassen At top of s slope on Gallatin Peak. 2103 Comment
  CAS-BOT-BC239806  Pseudoroegneria spicata James Moffitt 1941-5-14 s.n. Lassen Near Gilman Springs, 6 mi. ssw. of Karlo 1417 Comment
  UCD135122  Pseudotsuga menziesii var. menziesii John Thomas Howell; Gordon H. True 1973-6-28 49409 Lassen Sierra Nevada, Elysian Valley, west of Janesville. 1310 Comment
  CAS-BOT-BC361753  Psilocarphus brevissimus var. brevissimus John Thomas Howell 1934-7-10 12541 Lassen Patterson Flats Comment
  UC1924584  Psilocarphus brevissimus var. brevissimus Debra Valov 2006-5-28 2006014 Lassen Bieber off County Rd A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC99273  Psilocarphus tenellus var. tenellus Lowell Ahart; John Dittes 2008-6-22 15029 Lassen About 120 yards west of the road levee, on the bottom of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  JEPS114630  Psilocarphus tenellus var. tenellus Lowell Ahart, John Dittes 2008-6-22 15029 Lassen About 120 yards west of the road levee, on the bottom of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber 1262 Comment
  CDA27774  Psoralidium lanceolatum S. E. Piper 1943-7-2 Lassen 0.5 mile east of Herlong. 0 Comment
  CAS-BOT-BC72538  Pteridium aquilinum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49175 Lassen Elysian Valley northwest of Janesville 1325 Comment
  UC1562803  Pterospora andromedea Barbara Ertter 1987-7-25 7319 Lassen Hwy 44 ca 1 mi E of Shasta Co. line 1645 Comment
  RSA0042600  Puccinellia lemmonii Lowell A. Ahart, John Dittes, Todd Sloat 2013-6-9 18788 Lassen On the south side of the road, on the south side of McArthur Diversion Canal, 0.32 mile east of Tule River, 2.8 air-miles northwest of McArthur, Fall River Valley, McArthur Swamp. 1008 Comment
  CDA32668  Puccinellia nuttalliana M. D. Collins Jun 1923 Lassen Edge of Honey Lake 0 Comment
  CHSC7722  Purshia tridentata Beverley J. Wise 1969-5-4 94 Lassen 3.0 mi west on Shaeffer Mtn Lookout rd off Hwy 395, 27.4 mi. east of Susanville. 2042 Comment
  SEINET10542465  Purshia tridentata Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2592 Lassen Ca 6 miles s of susanville at junction of us hwy 395 and cal hwy 36 to Susanville, near johnstonville. Assoc.; Purshia-artemesia 1311 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
  JEPS95171  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 of 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
  UC1128550  Purshia tridentata var. tridentata K. Bradshaw 1939-5-27 234 Lassen Black Mountain Experimental Forest; Lassen National Forest, Halls Flat Quad. 1752 Comment
  CHSC59803  Pyrola dentata Mary Meyer 1980-7-31 Lassen Forest adjacent to road. 1828 Comment
  RSA0084312  Pyrola dentata Diana D. Jolles, Erik M. Beaston 2011-7-5 441 Lassen Lassen National Forest near area where Susan River flows through Clover Valley. Thinning unit near intersection of A-21 road and Silver Lake Road some miles south of Highway 44. 1784 Comment
  UC1523749  Pyrola picta Gary Schoolcraft 1981-7-7 497 Lassen n of Landon Lookout 1981 Comment
  RSA0084884  Pyrola picta Christopher Davidson 1974-7-24 2485 Lassen Ca. 4 mi W of Janesville on rd to Antelope Valley. 2134 Comment
  UC1609363  Pyrrocoma carthamoides var. cusickii Vernon H. Oswald and Lowell Ahart 1993-7-8 5667 Lassen Pittville Rd (Lassen 111, 36N01) 3.0 mi n Hwy 44 (ne of Poison Lake) 1709 Comment
  CAS-BOT-BC362262  Pyrrocoma carthamoides var. cusickii Clarence R. Quick 1964-7-29 64 -91 Lassen Blacks Mt. Experimental Forest 1798 Comment
  UCR163275  Pyrrocoma hirta Jim Andre 1993-6-29 1408 Lassen Madeline Plains about 2 miles south of Madeline along Hwy 395 1616 Comment
  JEPS19176  Pyrrocoma hirta var. lanulosa Leland S. Smith 1922-1 18 Lassen Windmill flat, nw Lassen County Modoc National Forest Comment
  UC1584018  Pyrrocoma hirta var. lanulosa G. Schoolcraft 1990-8-1 2119 Lassen about 1 mi s Heath Reservoir 1737 Comment
  UC506929  Pyrrocoma hirta var. lanulosa George A. Fischer and Irwin H. Johnson 1933-7-14 F 242 Lassen Patterson R.S. Lassen National Forest, Patterson R.S. 1737 Comment
  CDA8517  Pyrrocoma lanceolata var. lanceolata T. C. Fuller 1980-8-6 20315 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  JEPS100333  Pyrrocoma lucida Dean W. Taylor 2001-7-19 17838 Lassen meadow 0.5 air mi S of Doyle Grade, along private road in rural residential area Feather River Watershed 1859 Comment
  CHSC115718  Pyrrocoma lucida Kirsten Bovee 2012-8-12 Lassen Along Road 28N38 east of south end of Mountain Meadows Reservoir, straddling boundary with private land. Some seven air miles southeast of Westwood, CA. 1554 Comment
  CAS-BOT-BC105245  Quercus kelloggii John Thomas Howell 1973-7-10 49788 Lassen 3 miles W of Susanville 1371 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
  OBI77065  Quercus palustris Anthony Baniaga 2011-10-15 516 Lassen Susanville. Lassen County superior court parking lot. Susanville quad T30N R12E sec 33 SW of SW 1280 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
  UC1608998  Ranunculus alismifolius var. alismifolius Vernon H. Oswald and Lowell Ahart 1993-6-3 5470 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02) 1.8 mi n Hwy 44 (between Poison Lake and Susanville) 1749 Comment
  UC1609182  Ranunculus alismifolius var. alismifolius Vernon H. Oswald and Lowell Ahart 1993-5-12 5380 Lassen canal crossing Hwy 44 3.5 mi nw A21 (to Westwood) (n side of road and e side of canal) 1729 Comment
  CAS-BOT-BC334481  Ranunculus aquatilis var. capillaceus R. F. Thorne; Larry E. DeBuhr 1975-8-22 46981 Lassen Along Hwy 395 ca 6 miles N of Madeline and 4.5 miles S of Modoc county line. 1616 Comment
  CHSC41844  Ranunculus aquatilis var. capillaceus P. V. Caldwell 1972-7-12 284 Lassen Floating on pools and on banks of Papoose Creek. Comment
  NY652209  Ranunculus aquatilis var. capillaceus G. Schoolcraft 1996-9-11 2561 Lassen Willow Creek near Belfast 1432.6 Comment
  SEINET10536066  Ranunculus aquatilis var. capillaceus Mary Susan Taylor 1974-1 Taylor 282 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  SEINET10899319  Ranunculus aquatilis var. capillaceus Mary Susan Taylor 1982-6-12 Taylor 4648 Lassen T29N R10E ne/nw sec 13. Westwood quad. Aquatic in still pond on n side of West Fork of Susan River, s side of Hwy 36 at jct w/ Willow Cr Rd, 8 mi w Susanville. Comment
  CAS-BOT-BC379022  Ranunculus aquatilis var. diffusus Peter H. Raven; Otto T. Solbrig 1958-6-17 13256 Lassen in a pond along United States Highway 395, 7.1 mi west of Standish Comment
  CAS-BOT-BC379025  Ranunculus aquatilis var. diffusus M. S. Taylor 1982-6-12 4647 Lassen aquatic in still pond S side of Hwy 36, N side of west fork Susan River, at jct with Willow Creek Rd., ca. 8 mi W of Susanville Comment
  CHSC4982  Ranunculus cymbalaria R. Clicquennoi 1967-6-24 53 Lassen In meadow, 4 mi e of Eagle Lake Biological Station at Murrer's Upper Meadow. 1524 Comment
  UC9426  Ranunculus cymbalaria var. saximontanus J. Burtt Davy Jun 17 1897-Jun 24 1897 3370 Lassen Honey Lake Valley Comment
  CHSC60391  Ranunculus flammula var. ovalis Mary Ann Showers 1992-6-13 2549 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  CHSC25560  Ranunculus glaberrimus var. ellipticus Robert A. Schlising 1977-4-2 3185 Lassen Along dirt road, east of Eagle Lake Field Station. 1584 Comment
  CHSC13795  Ranunculus macounii Cathy Crittenden 1970-7-8 37 Lassen Lower Murrer's Meadow along Willow Creek. 1463 Comment
  SEINET10535979  Ranunculus occidentalis Mary Merello 1993-6-28 Merello 749 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
  UC1126218  Ranunculus occidentalis K. E. Bradshaw 1939-5-27 242 Lassen Black Mountain Experimental Forest Lassen National Forest, Halls Flat Quadrangle (Plot 39-4) Comment
  CHSC91184  Ranunculus testiculatus Lowell Ahart; John Dittes 2005-6-1 11911 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  CDA3492  Ranunculus testiculatus T. C. Fuller 1969-5-22 18480 Lassen County fairgrounds, Susanville. 0 Comment
  UCD97132  Ranunculus testiculatus T. C. Fuller 1963-6-12 10666 Lassen Susanville, county fairgrounds. Comment
  CHSC27740  Ranunculus uncinatus Jennifer Estep 1978-7-5 10 Lassen E side of Mahogany L. 2060 Comment
  CAS-BOT-BC362886  Ratibida columnifera John Thomas Howell 1974-7-9 50486 Lassen SW. of Wildcat Point, Eagle Lake 1554 Comment
  CAS-BOT-BC362887  Ratibida columnifera Nick Santamaria 1969-7-21 721 Lassen On the west side of Eagle Lake, two miles N. of the Eagle Lake Resort on service road #33N01 Comment
  RSA747549  Rhamnus rubra K. M. Meyer, A. Townesmith 2007-7-23 156 Lassen Lassen National Forest. 5.6 miles SW on 32N10 off Hwy 44. (Turn at rest area). 1980 Comment
  UC1523733  Rhamnus rubra Gary Schoolcraft 1981-7-21 544 Lassen ne of Pittville (along Hwy 299) 1249 Comment
  UC1587100  Rhaponticum repens G. Schoolcraft 1991-7-31 2203 Lassen just n of Hall Spring; Shinn Mts. 1706 Comment
  CHSC13607  Ribes Lynn R Thomas 1969-4-17 93 Lassen 100 yds up slope w of back of Lassen Memorial Hospital, Susanville. Boundary between T29N and T30N. 1310 Comment
  UC11663  Ribes aureum J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  JEPS49429 Image available Ribes cereum W. L. Jepson 1910-6-11 4118 Lassen base Cinder Cone 1889 Comment
  CAS-BOT-BC169007  Ribes hudsonianum L. S. Smith 1918-8-13 1033 Lassen Lost Lake, Silver Creek, Modoc National Forest 2286 Comment
  RSA0024767  Ribes roezlii James Henrickson 1969-9-4 4267 Lassen 4 miles S of Westwood along Highway 147. 1390 Comment
  CHSC60743  Ribes velutinum Vernon H. Oswald; Lowell Ahart 1993-6-14 5547 Lassen Eagle lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  OBI75884  Ribes velutinum Anthony Baniaga 2011-7-1 414 Lassen BLM. Fort Sage MTs OHV area, E of Doyle. Quad 1638 Comment
  SEINET10684651  Ribes viscosissimum Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 151 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
  JEPS29198  Rigiopappus leptocladus Lauramay T. Dempster 1961-6-17 1672 Lassen Gold Run Creek about 4 mi sw of junction with Richmond Road (s of Susanville); Gold Run Creek Comment
  SD131593  Rigiopappus leptocladus Arnold Tiehm, Margaret Williams, Jan Nachlinger 1988-6-2 11700 Lassen south side of Shaffer Mt., 3.4 road miles north of the Wendel road on highway 395 from susanville to Alturas west of the highway 1385 Comment
  CHSC84873  Rorippa curvisiliqua Samantha Mackey Hillaire; Linnea Hanson, Catie Bishop 2003-9-21 354 Lassen Lassen Volcanic National Park. Snag Lake; mudflat just N of an open stand of willows on the south shore of the lake; just east of where Grassy Creek flows into the lake. [Label says 'area near' latitude and longitude]. 1900 Comment
  UC10717  Rorippa curvisiliqua M. S. Baker and F. Nutting 1894-7-1 Lassen Dixey Mts. Comment
  CHSC5241  Rorippa palustris var. occidentalis V. Holt 1945-6-5 Lassen Aspen Grove, Eagle Lake. 1584 Comment
  CAS-BOT-BC74856  Rorippa sinuata Verne Grant; Irving Schneider 1947-8-1 8226 Lassen Irrigation ditch running southwest into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
  NY182160  Rorippa sinuata G. Schoolcraft 1989-6-6 1901 Lassen North end of Secret Valley west of Hwy. 395. 1350.3 Comment
  UC1567407  Rorippa sinuata G. Schoolcraft 1989-6-6 1901 Lassen n end Secret Valley w Highway 395; n end Secret Valley 1350 Comment
  CHSC12463  Rosa woodsii subsp. ultramontana Robert W. Severin 1969-6-26 44 Lassen Springs area 1 mile north of Galatin Beach, 3 mi s of E.L.B.S. 1645 Comment
  HSC81474  Rosa woodsii subsp. ultramontana Thomas W. Nelson, Jane P. Nelson 1980-7-6 6019 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir. 1585 Comment
  JEPS45639  Rosa woodsii var. ultramontana W. L. Jepson 1918-8-3 7801 Lassen Honey Lake Valley 1219 Comment
  CHSC6261  Rubus leucodermis P. Balch 1955-7-20 Lassen Eagle Lake. Paul Bunyan road, 3 1/2 mi. from Susanville. 1615 Comment
  CHSC112845  Rumex crispus Lowell Ahart; John Dittes 2013-7-22 18865 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
  JEPS121297  Rumex crispus Lowell Ahart 2013-7-22 18865 Lassen 30 yards S of a man-made pond, about 120 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC113066  Rumex fueginus Lowell Ahart; John Dittes 2013-7-22 18849 Lassen West margin of a duck field, about 30 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CAS-BOT-BC433634  Rumex lacustris James Jokerst 1983-7-25 1891 Lassen Near Madeline Plains. 1614 Comment
  CHSC112393  Rumex salicifolius Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18774 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC113068  Rumex salicifolius subsp. triangulivalvis Lowell Ahart; John Dittes 2013-7-22 18867 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1101216  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-7-30 8188 Lassen s point of w embayment Tule Lake Comment
  UC526136  Rumex salicifolius var. lacustris John Thomas Howell 1934-7-8 12486 Lassen Spalding's Eagle Lake Comment
  UC748281  Rumex salicifolius var. triangulivalvis Annie M. Alexander and Louise Kellogg 1946-8-11 5153 Lassen nw end Grasshopper Valley Comment
  CDA23213  Rumex salicifolius var. triangulivalvis T. C. Fuller 1959-7-7 Lassen Highway 395, 11 miles south of Ravendale. 0 Comment
  JEPS121296  Rumex stenophyllus Lowell Ahart, John Dittes 2013-7-22 18866 Lassen North margin of road levee, about 100 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  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
  SEINET4176394  Rumex venosus P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CHSC5927  Sagittaria cuneata J. B. Kimsey 1946-6-17 Lassen Grasshopper Valley. 1624 Comment
  CAS-BOT-BC445672  Sagittaria cuneata Jean L. Pawek 1964-8-16 604 Lassen Lake Almanor near Chester 1371 Comment
  CAS-BOT-BC445675  Sagittaria cuneata B. Trowbridge 1977-7-11 5985 Lassen In Willow Creek, vicinity of Rice Canyon, northeast of Susanville 1706 Comment
  HSC2900  Sagittaria latifolia Fred J. Kindel 1955-6-30 Lassen Mtn. Meadows Reservoir. Comment
  HSC95346  Salix eastwoodiae Gordon Leppig, J. Cromwell 1997-7-27 608 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CHSC106585  Salix exigua C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC66403  Salix exigua Vernon H. Oswald; Lowell Ahart 1996-6-17 7784 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36 ca. 7 mi W of Susanville. 1432 Comment
  CAS-BOT-BC107958  Salix geyeriana John Thomas Howell 1976-7-20 s.n. Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass - Sierra Nevada 1432 Comment
  NY187518  Salix hindsiana N. F. Bracelin 1931-6-29 485 Lassen McArthur 960 Comment
  RSA716142  Salix jepsonii L. Ahart, John Dittes 2005-6-2 11947 Lassen About 1.5 miles NE of the Anderson Ranch home. Long Valley. About 6 (air) miles N of the intersection of Scott Road and Hwy 70. 7.5 (air) miles NW of Hallelujah Jct. 1602 Comment
  HSC26528  Salix lasiandra J. P. Smith, J. O. Sawyer 1972-5-6 5239 Lassen Lassen National Forest, Boundary Campground on Hwy. 89 S of Burney 1067 Comment
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Apr 29 2013
  POM209555  Salix lemmonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 684 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  CAS-BOT-BC129524  Salix melanopsis Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  CAS-BOT-BC126131  Salix scouleriana John Thomas Howell; Gordon H. True 1973-7-31 50041 Lassen On road from Janesville to Thompson Peak, Diamond Range 1783 Comment
  JEPS59867  Salsola tragus W. L. Jepson 1918-8-2 7791 Lassen Long Valley 1219 Comment
  JEPS94499  Salvia aethiopis Vernon H. Oswald and Lowell Ahart 1997-5-27 8482 Lassen just n of Susanville (w side of Highway 139 at Lassen Community College); Lassen Community College, Highway 139 1310 Comment
  CHSC42206  Salvia dorrii C. E. Laver 1985-6-1 Lassen Ca. 5.5 mi ne of Litchfield and 5 mi nw of Wendel. 1371 Comment
  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
  CHSC5226  Sambucus melanocarpa A. Santos 1946-6-17 Lassen E side of Eagle Lake. 1615 Comment
  CAS-BOT-BC110336  Sarcobatus vermiculatus Louella Bass 1982-6-20 s.n. Lassen West of Karlo. Comment
  CAS-BOT-BC110337  Sarcobatus vermiculatus John Thomas Howell 1934-6-10 11897 Lassen Horse Lake. Comment
  CHSC13628  Sarcobatus vermiculatus M. S. Taylor 1974-7-8 261 Lassen Abundant on e side of Rt A3, ca. 1 mi n of Honey Lake, ca. 1 mi s of Standish, Honey Lake Wildlife Refuge. Comment
  JEPS59876  Sarcobatus vermiculatus W. L. Jepson 1918-8-4 7805 Lassen Horse Lake 1554 Comment
  SJSU14475  Sarcobatus vermiculatus W. D. Pitts 1990-5-29 298 Lassen by Hwy 395 between Madeline & Ravendale 1432 Comment
  UCD101770  Sarcobatus vermiculatus Beecher Crampton 1960-6-19 5730 Lassen southeast of Karlo; along U.S. Hwy 395. Comment
  SEINET10532872  Sarcobatus vermiculatus Mary Susan Taylor 1982-6-12 Taylor 4650 Lassen 4010 ft. T28N R14E se sec 3. Standish quad. Alkali flats in Hartson Lake Refuge, 1 mi n of Hartson Lake on n side of Honey Lake, ca. 13 mi se of Susanville. 1222 Comment
  HSC17990  Sarcodes sanguinea M. S. Baker 1890-3 Lassen Honey Lake Valley Comment
  UC1037239  Saxifraga aprica Leo Whitney 1935-6-11 3227 Lassen Camp 10, Fruit Grower's Supply Company Camp 10; Lassen National Forest, Fruit Grower's Supply Company Comment
  JEPS1765  Saxifraga nidifica var. nidifica Milo S. Baker 1952-5-23 12422 Lassen e of Chester (Hwy 36) Comment
  UC1542944  Saxifraga nidifica var. nidifica G. Schoolcraft 1987-4-29 1685 Lassen Lonkey Hill 1432 Comment
  JEPS17632  Saxifraga oregana Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5403 Lassen 0.8 mi s of Lassen-Modoc County Line (below and s of Patterson Ranger Station, along East Creek, southern end of the Warner Mountains); Warner Mountains, East Creek 2011 Comment
  RSA300132  Schedonorus arundinaceus J. T. Howell, Gordon H. True 1973-8-1 50185 Lassen Gold Run Creek Road, south of Susanville, Diamond Range 1585 Comment
  CAS-BOT-BC283611  Schedonorus pratensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49466 Lassen Elysian Valley, W of Janesville 1325 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
  CHSC93678  Schoenoplectus pungens var. longispicatus Lowell Ahart; John Dittes 2005-6-2 11975 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  CHSC61594  Scirpus microcarpus Arthur G. Barrett 1915-8-18 35 Lassen Plumas National Forest. Laufman Ranger Station. 1463 Comment
  UC1100881  Scirpus nevadensis Verne Grant and Irving Schneider 1947-9-5 8376 Lassen nw shore Eagle Lake (by Sam Webb's place; Spaulding); nw shore Eagle Lake by Sam Webb's place Comment
  UC2198  Scirpus pungens J. Burtt Davy Jun 17 1897-Jun 24 1897 3286 Lassen sloughs Susan River (Honey Lake Valley); , Honey Lake Valley Comment
  CAS-BOT-BC240002  Scribneria bolanderi Alice Eastwood; John Thomas Howell 1940-6-11 7974 Lassen Big Valley Mts. Comment
  UC1100464  Scribneria bolanderi Malcolm A. Nobs, S. Galen Smith, Herbert L. Mason 1949-5-29 759 Lassen Nubeiber, on Great Northern Railroad, Highway 299 Nubeiber; , Great Northern Railroad, Highway 299 Comment
  SEINET13751284  Scrophularia desertorum N. H. Holmgren, P. K. Holmgren 1978-6-11 8922 Lassen Painters Flat road, 28.3 km (17.6 miles) east of Ravendale and 23.5 km (14.5 miles) airline distance. 1740 Comment
  UC1523769  Scutellaria antirrhinoides Gary Schoolcraft 1981-6-9 449 Lassen ne of McArthur 1280 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
  CAS-BOT-BC214264  Scutellaria nana M. S. Baker; Frank Nutting 1894-7-12 s.n. Lassen Pine Creek Comment
  POM252832  Scutellaria nana A. A. Heller 1938-6-23 15186 Lassen 1 mile south of Westwood. 1524 Comment
  RSA719468  Scutellaria nana L. P. Janeway 2005-4-7 84614 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 534 Comment
  CAS-BOT-BC240082  Secale cereale Margaret Williams; Steven Williams 1974-7-26 74 -L-38 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  UCD92548  Secale cereale A. A. Beetle 1941-6-28 2811 Lassen 6 miles south of Ravendale, lower slopes Observation Peak. Comment
  SEINET10517203  Secale cereale Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 887 Lassen Collected 3 mi N of Milford. On Hwy 395 at Honey Lake Campgrounds. Comment
  RSA0076359  Sedum lanceolatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  POM260867  Senecio eurycephalus Alice Eastwood, J. T. Howell 1940-6-11 7968 Lassen Eastern Fall River Valley. Comment
  CDA38660  Senecio eurycephalus var. lewisrosei B. Villegas 2010-6-17 PDR# 1535022 Lassen South of Adin; Hwy. 139 at Milepost 58. 0 Comment
  CHSC20308  Senecio hydrophiloides S. Villard 1973-7-7 63 Lassen Meadow, off county dirt road, 5 mi from Red-Rock Lookout. 2133 Comment
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Apr 29 2013
  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
  HSC95295  Senecio hydrophilus Gordon Leppig, J. Cromwell 1997-7-27 615 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  SBBG8784  Senecio hydrophilus H. and M. Dearing 1938-7-1 2241 Lassen 12 mi W of Susanville Comment
  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
  CHSC68736  Senecio integerrimus var. exaltatus Vernon H. Oswald; Lowell Ahart 1997-5-27 8508 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.3 mi east of Hwy. 139. Between the road and a small creek paralleling the road on the north. 1560 Comment
  CAS-BOT-BC341186  Senecio lugens John Thomas Howell 1934-6-14 12159 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CHSC26149  Senecio triangularis Detzer; Sacks 1977-7-24 1 Lassen Along streambank, ca. 3 mi se of Milford, .5 mi. se of Laufman Ranger Station on unimproved USFS road. 1481 Comment
  UC1562580  Senecio triangularis Barbara Ertter 1988-7-25 7870 Lassen ridge of mts. ca 1.5 mi e Diamond Peak (ca 10 airmiles due s of Susanville); Diamond Mts. 2255 Comment
  CHSC100133  Shepherdia argentea L. P. Janeway 2008-8-2 9526 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Tanch Road 1.8 km west of the CA-NV line. 1349 Comment
  JEPS117494  Sidalcea glaucescens Lowell Ahart, John Dittes 2010-7-31 17016 Lassen On the south side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  RSA768029  Sidalcea glaucescens L. Ahart, John Dittes 2010-7-31 17016 Lassen About 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1516 Comment
  UC1587031  Sidalcea glaucescens G. Schoolcraft 1991-7-30 2198 Lassen East slope of Widow Mountain 1859 Comment
  UC585099  Sidalcea glaucescens E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1778 Lassen 4 mi s Ravendale (slope of creek at n end of Secret Valley); n end Secret Valley, s of Ravendale 1371 Comment
  CAS-BOT-BC205765  Sidalcea oregana Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  CHSC30043  Sidalcea oregana Cindy Prouty 1978-7-27 7 Lassen Little Antelope Valley, W of Eagle L. 1792 Comment
  CHSC83236  Sidalcea oregana Raymond D. Ratliff 1965-8-6 53 Lassen Lassen National Forest, Harvey Valley Allotment (Ashurst Well). Streambed. 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
  UC619263  Sidalcea oregana subsp. oregana J. and H. W. Grinnell 1938-7-13 1099 Lassen near Ravensdale; near Ravensdale 1554 Comment
  CAS-BOT-BC384311  Silene bernardina Clare B. Hardham 1971-8-22 18369 Lassen Diamond Mountain 2133 Comment
  JEPS28445  Silene bernardina George W. Gillett 1957-7-24 896 Lassen dry flats between Cameron Meadow and Snag Lake (Lassen Volcanic National Park); , btw Cameron Mdw and Snag Lake 1950 Comment
  UC1523760  Silene bernardina Gary Schoolcraft 1982-6-23 727 Lassen Ft. Sage Mts. 1828 Comment
  UC1137882  Silene lemmonii H. P. Hagge 1929-9-17 36 Lassen Logan Mtn. Eagle Lake Quad., Logan Mtn. 1828 Comment
  UC311415  Silene lemmonii Marcus E. Jones, A. M. 1897-6-28 Lassen Perkin's Ranch Diamond Mt., , Perkin's Ranch (Susanville) 1828 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
  SDSU4478  Silene menziesii D. F. Howe 1964-8-1 3908 Lassen Parsnip Creek, Warner Mts., Modoc National Forest. 1829 Comment
  JEPS50951  Silene occidentalis subsp. occidentalis Brown and Wieslander 1922-7-23 32 Lassen Martin Sprs. Eagle Lake, Martin Sprs. Comment
  CAS-BOT-BC75079  Sisymbrium altissimum Louella Bass 1973-5-25 46 Lassen Sierra Nevada. Elysian Valley. 1325 Comment
  RSA715618  Sisymbrium altissimum L. Ahart, John Dittes 2005-6-1 11850 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  RSA0045631  Sisymbrium orientale Lowell A. 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
  UC773859  Sisyrinchium idahoense L. R. Short, Wm. Gansberg 1936-6-11 S 430 Lassen Burgess Spring Esperiment Range; Lassen Forest 1730 Comment
  JEPS97325  Solidago velutina subsp. californica Vernon H. Oswald 1995-8-21 7207 Lassen T38N R15E NE1/4 Sec. 20, 6100 ft, Warner Mtns., Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 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
  CHSC116096  Sonchus asper subsp. asper Lowell Ahart; John Dittes 2015-7-13 20304 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
  HSC95262  Sparganium emersum Gordon Leppig, J. Cromwell 1997-7-27 627 Lassen Modoc National Forest, Blue Lake Ranch. 1970 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
  CAS-BOT-BC390559  Spergularia rubra G. Schoolcraft 1997-8-6 2656 Lassen Along w. fork of Gold Run Creek about 8 miles sw of Susanville 1859 Comment
  CAS-BOT-BC374759  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1998-6-29 2319 Lassen Ash Valley along main road crossing Ah [Ash] Crk. 1554 Comment
  UC13098  Spiraea densiflora M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  SEINET3818362  Spiranthes romanzoffiana A. A. Heller 1938-1 Lassen Comment
  UC1137688  Stachys ajugoides var. rigida L. R. Short and Wm. Gansberg 1936-7-9 S- 485 Lassen Burgess Spr. Exp. Range Lassen Forest 1795 Comment
  CHSC75482  Stanleya viridiflora Vernon H. Oswald; Lowell Ahart 1999-6-9 9744 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  GMDRC6448  Stanleya viridiflora J. M. Andre, Glenn Clifton 1993-6-14 30001 Lassen northeast base of Shaffer Mtn near Secret Creek, about 20 miles ENE of Susanville 1646 Comment
  SEINET11604939  Stanleya viridiflora L. Bass 1982-7-25 10 -82 Lassen Near Karlo, ca 12 miles N of Litchfield. 1356 Comment
  CAS-BOT-BC391078  Stellaria longipes subsp. longipes Louella Bass 1973-5-29 87 Lassen Elysian Valley 1325 Comment
  UC120067  Stellaria longipes var. longipes unknown 1892-6-23 Lassen Honey Lake Comment
  CHSC5211  Stenotus acaulis J. B. Kimsey 1946-6-17 Lassen Mt. Fredonyer. 2377 Comment
  UC1755281 Image available Stenotus lanuginosus var. lanuginosus Dean W. Taylor 2007-6-14 20127 Lassen Upper Gooch Valley, Forest Road 35N05 (County Road 22) 0.3 miles north of junction with Forest Road 34N45 1889 Comment
  CDA18319  Stephanomeria exigua G. D. Barbe 1974-8-2 1930 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CAS-BOT-BC375307  Stephanomeria exigua subsp. coronaria John Thomas Howell 1934-6-10 11847 Lassen 4 miles south of Omira Comment
  CAS-BOT-BC322924  Stephanomeria tenuifolia Louella Bass No date on label. s.n. Lassen Elysian Valley, Sierra Nevada Comment
  HSC79992  Stipa comata William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  SEINET8061783  Stipa comata var. comata P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  SEINET10443621  Stipa thurberiana M. Church 2016-6-21 5 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1507 Comment
  SEINET10448891  Streptanthus cordatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 514 Lassen 6 mi. N. Of hallelujah jct. On us 395, in artemesia tridentata, pinyon pine, jeffrey pine along ridge and in sandy wash. 1402 Comment
  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
  HSC23510  Stuckenia pectinata R. Carter 1967-7-13 594 Lassen 5 mi. E of Eagle Lake Biology Station at point where road comes nearest to Willow Creek 1561 Comment
  HSC22877  Stuckenia pectinata John Pratt 1970-6-14 13 Lassen Comment
  JEPS120473  Suaeda nigra L. P. Janeway, B. Castro 2012-7-2 10925 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. Comment
  NY541219  Suaeda nigra G. Schoolcraft 1998-9-14 2807 Lassen Flat near Amedee Hot Springs 1219.2 Comment
  JEPS95901  Suaeda occidentalis Lowell Ahart 1999-9-13 8211 A Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  JEPS47014  Swertia albicaulis var. albicaulis Jos. Grinnell Lassen Eagle Lake 1584 Comment
  POM68227  Symphoricarpos acutus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 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 of Butte Creek outlet. 1841 Comment
  CAS-BOT-BC97526  Symphyotrichum ascendens Margaret Williams; Louella Bass 1972-10-22 EV 4 Lassen Elysian Valley, northwest of Janesville 1325 Comment
  CHSC76083  Symphyotrichum frondosum Lowell Ahart; Vernon H. Oswald 1999-9-13 8232 Lassen On the strand of Eagle Lake, west of Highway 139, near the south end of the lake and highway, Eagle Lake. 1554 Comment
  CAS-BOT-BC97918  Symphyotrichum frondosum G. D. Hanna 1958-9-20 s.n. Lassen Cold Spring - Eastern Lassen Co. Comment
  UC1924205  Symphyotrichum spathulatum Debra Valov 2005-8-20 2005219 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC112988  Taraxia tanacetifolia Lowell Ahart; John Dittes 2013-7-23 18885 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
  CHSC99278  Taraxia tanacetifolia Lowell Ahart; John Dittes 2008-6-22 15037 Lassen About 220 yards west of the road levee, on the banks of a small natural drainage, in Big Valley, about 2.1miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5 miles (air) northeast of Bieber. 1262 Comment
  JEPS89944  Taraxia tanacetifolia Dean W. Taylor 1974-6-14 3713 Lassen on Hwy. 44 ca. 2 mi. w. from junction w/ Pittville Rd. (Poison Lake); Modoc Plateau, Poison Lake 1615 Comment
  UC1523755  Taraxia tanacetifolia Gary Schoolcraft 1981-8-11 557 Lassen Said Valley Reservoir 1615 Comment
  UC168938  Taraxia tanacetifolia F. Stephens 1894-7-7 Lassen Willow Creek Canyon 1280 Comment
  CAS-BOT-BC329045  Tetradymia canescens Elmer I. Applegate 1897-6-4 851 Lassen Madeline Plains Comment
  UC1136973  Tetradymia canescens L. R. Short 1936-9-13 S 503 Lassen Burgess Spring Experimental Range Lassen Forest 1761 Comment
  UC1562341  Tetradymia canescens Vernon Oswald and Lowell Ahart 1990-7-25 4398 Lassen 2.2 mi w Hwy 395 (intersection of Hwy 70 and Scott Rd) 1463 Comment
  UC501445  Tetradymia canescens Frank W. Peirson 1932-7-20 10354 Lassen 20 mi se Susanville Comment
  SJSU5619  Tetradymia canescens V. Hardham 1965-7-13 139 Lassen Pit R Falls 1066 Comment
  CHSC33334  Tetradymia glabrata Hank Thompson 1980-4-14 20 Lassen Ca. 24 mi E of Susanville. 1402 Comment
  JEPS128169  Tetradymia glabrata M. C. Mahoney, J. A. Nash 2017-7-12 CA 350 -83 Lassen Balls Canyon. From Susanville take A27 east. Turn left on Belfast Road. Continue for 5 miles and turn right onto a dirt road. Follow for two miles until it dead ends at Balls Canyon. Population is on he west side of the canyon. Comment
  JEPS38105  Tetradymia glabrata R. F. Hoover 1940-10-5 4665 Lassen Wendel Comment