Search Results — 2000 specimen records retrieved (1584 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CAS-BOT-BC78035  Abies concolor Clare B. Hardham 1969-8-28 s.n. Lassen west of Janesville Comment
  RSA518546  Abies concolor F. C. Vasek 1976-9-3 760903 -A Lassen 5 miles W of Susanville, N of State Highway 44 at a point 1/4 mile N of junction with State Highway 36. Comment
  UCD133116  Abies concolor Beecher Crampton 1960-6-18 5711 Lassen Southern Warner Mountains, vicinity of Blue Lake Ranch. 1981 Comment
  CHSC21470  Abies magnifica M. S. Taylor 1975-7-16 839 Lassen On trail between Echo Lake and Summit Lake, Lassen National Park. 2133 Comment
  CHSC6219  Abies magnifica P. Balch 1955-6-1 Lassen Silver Lake. 1981 Comment
  UC1196917  Abies magnifica var. magnifica A. W. and M. Kildale 1926-9-1 2725 Lassen 11 mi n Chester; Lassen National Park, Juniper Lakes 2054 Comment
  RSA603232  Acer glabrum var. torreyi C. Epling, Wm. Robinson 1935-7-19 s.n. Lassen Sulphur Spring, Lassen Park Comment
Read comments
May 1 2013
  CAS-BOT-BC331637  Acer macrophyllum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49449 Lassen Elysian Valley, west of Janesville 1325 Comment
  SEINET7893918  Acer macrophyllum E. Brooks 1927-5-9 s.n. Lassen 80 miles N of Reno. 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-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
  CHSC7697  Achnatherum hymenoides Beverley J. Wise 1969-5-16 134 Lassen 18 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd 215. 1493 Comment
  UC60714  Achnatherum hymenoides J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Long Valley Honey Lake Valley Comment
  CAS-BOT-BC210662  Achnatherum lemmonii John Thomas Howell 1976-7-20 52004 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  UC1137653  Achnatherum lemmonii George A. Fisher and Irwin H. Johnson F 198 Lassen Grass Valley Lassen National Forest 1696 Comment
  UCD18958  Achnatherum lemmonii Jack N. Reppert 1965-7-13 18 Lassen Lassen National Forest, Harvey Valley Allotment-Logan Springs. 1706 Comment
  UCD37477  Achnatherum lemmonii Beecher Crampton 1960-6-18 5717 Lassen Lassen County, southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 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-BC216444  Achnatherum occidentale subsp. californicum 1927-6-25 29 Lassen Unspecified 1706 Comment
  UC773979  Achnatherum occidentale subsp. californicum L. R. Short and Wm. Gansberg 1936-6-2 S- 366 Lassen Burgess Spring Experiment Range Lassen Forest 1858 Comment
  RSA582082  Achnatherum occidentale subsp. occidentale J. T. Howell 1934-7-6 12431 Lassen Hall's Flat. Comment
  CAS-BOT-BC218611  Achnatherum occidentale subsp. pubescens John Thomas Howell 1974-7-10 50519 Lassen Janesville, at the cemetery, Sierra Nevada 1295 Comment
  UC773977  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
  SEINET235298 Image available Achnatherum thurberianum R. B. Turner 1980-5-18 Lassen Hwy 139 1 miles N of Susanville. 1463 Comment
  UCD51427  Achnatherum thurberianum B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  SBBG67342  Acmispon americanus S. W. Hutchinson -Jun-1925 539 Lassen Eagle Lake region 1554 Comment
  CHSC30681  Acmispon americanus var. americanus M. S. Taylor 1974-7-10 281 Lassen In meadow, ca. 0.5 mi e of Gallatin Beach, ca. 0.5 mi s of Eagle Lake, ca. 12 mi ne of Susanville. 1524 Comment
  OBI75866  Aconitum columbianum subsp. columbianum Anthony Baniaga 2011-8-9 490 Lassen Lassen Natl Forest. About 1/2 mi W of Griffith Hill, S of 30N21. Swain Mtn quad T30N R8E sec 8 NW of NW 1950 Comment
  CHSC117525  Acroptilon repens Lowell Ahart; John Dittes 2016-7-13 21103 Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS35591  Adonis aestivalis Wayne Savage 1964-7-1 339 Lassen 1/2 mi n of Willow Creek Guard Station (16 mi n of Susanville, on State Highway 139, 54 mi s of Adin); State Highway 139 1219 Comment
  UCD95438  Adonis aestivalis Gerald Dickinson 1963-7-2 s.n. Lassen Willow Creek Campground, ca. 18 miles southeast of Adin on road to Termo. 1219 Comment
  CHSC12963  Agastache parvifolia L. B. Barlow 1967-6-30 51 Lassen West central shore of Eagle Lake, 1/2 mi. south of Pelican Point. 1554 Comment
  CHSC9544  Agastache parvifolia L. E. Ray 1967-6-25 53 Lassen Coll. ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  JEPS28682  Agastache parvifolia George W. Gillett 1957-7-26 909 Lassen along e shore Butte Lake (Butte Lake, Lassen Volcanic National Park); Lassen Volcanic National Park, Butte Lake 1859 Comment
  CHSC23525  Agastache urticifolia Wayne O. Baum 1971-7-14 71 -68 Lassen N slope of Gallatin Peak. 2011 Comment
  POM70458  Agastache urticifolia Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  UC104571  Agastache urticifolia F. Stephens 1894-7-15 Lassen Madeline Divide Comment
  JEPS18703  Ageratina occidentalis Brown and Wieslander 1922-7-23 62 Lassen Martin Springs Eagle Lake, Martin Springs Comment
  CAS-BOT-BC30233  Ageratina occidentalis Hans Leschke 1964-9-4 1894 Lassen Lassen Highway near Diamond Point Comment
  UC29341  Agoseris X dasycarpa M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Dixey Valley Comment
  CHSC91811  Agoseris glauca G. Douglas Barbe 1974-8-20 1922 Lassen Upper Lond Valley. Hallelujah Junction, northwest corner of jct. of US Hwy 395 and Hwy 70. 1524 Comment
  SEINET10616047  Agoseris glauca Paul Gallian, David B. Dunn 1971-6-2 Gallian 520 Lassen 6 mi. N of Hallelujah Jct. on U.S. Hwy. 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  CHSC101022  Agoseris glauca var. laciniata John Dittes 2008-5-22 1539 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.5 air miles east of Hayden Hill, ca 465 feet east of intersection of Hwy 139 and FS Road 36N02; alluvial terrace on northeast side of Willow Creek. 483 Comment
  CHSC7650  Agoseris glauca var. laciniata Beverley J. Wise 1969-4-29 9 Lassen 3.5 mi. from Susanville on the Round Valley road (turns off Hwy 139 approx. 1.4 mi. from Susanville). 1341 Comment
  RSA0009531  Agoseris grandiflora Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CHSC91310  Agoseris heterophylla Lowell Ahart; John Dittes 2005-6-1 11885 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction. 1438 Comment
  JEPS107320  Agoseris heterophylla Lowell Ahart, John Dittes 2005-6-1 11885 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction 1438 Comment
  JEPS118267  Agoseris heterophylla Lowell Ahart, John Dittes 2011-6-20 17485 Lassen About 15 yards west of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  POM34510  Agoseris heterophylla Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  RSA416397  Agoseris heterophylla Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CAS-BOT-BC433230  Agoseris heterophylla K. L. Chambers; Peter G. Dorris 1963-5-11 s.n. Lassen Red Rock Road, just east of Hwy. 395 (and just w. of Nevada State Line), ca. 10 mi. n. of Hwy. 70 junction, and s. of Constantia. Comment
  UC585117  Agoseris heterophylla var. heterophylla E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1774 Lassen dry sandy wash Red Rock 1280 Comment
  UC773952  Agoseris parviflora L. R. Short and J. Warren 1936-6-5 S- 372 Lassen Burgess Spring Experiment Range Burgess Spring Experiment Range 1798 Comment
  CAS-BOT-BC127581  Agropyron cristatum John Thomas Howell 1961-9-25 36970 Lassen Sierra Nevada. East side of Beckwourth Pass. 1554 Comment
  JEPS88236  Agropyron desertorum Vernon H. Oswald and Lowell Ahart 1996-6-17 7800 Lassen 7 mi w of Susanville (1 mi e of Devils Corral Trailhead, Bizz Johnson Trail (accessed at Devils Corral Trailhead), off Hwy 36); Modoc Plateau 1420 Comment
  SEINET13680160  Agropyron desertorum P. Gallian, David B. Dunn 1971-6-2 484 Lassen 5 mi. S of Milford near Honey Lake on U.S. Hwy. 395.; 0 1250 Comment
  UCD18954  Agropyron saundersii Jack N. Reppert 1965-7-12 24 Lassen Lassen National Forest, Harvey Valley Allot. (HV 17-11). 1682 Comment
  SEINET10964052  Agropyron trachycaulum R. Ondricek 1978-8-2 Ondricek 113 Lassen North edge of dam at Murrers Upper Meadow. T32N, R11E, E edge of Sec. 26, Fredonyer Peak Quadrangle, 15 ft. 1548 Comment
  UC60210  Agrostis J. Burtt Davy Jun 17 1897-Jun 24 1897 3303 Lassen Honey Lake Valley Comment
  UC53515  Agrostis exarata M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley 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
  UCD51747  Agrostis gigantea John Thomas Howell 1975-7-23 51401 Lassen Sierra Nevada. Susanville. 1295 Comment
  CAS-BOT-BC139294  Agrostis idahoensis George W. Gillett 1957-7-22 877 Lassen Lassen Volcanic National Park. Snag Lake. Margin of gravel bars 100 yards above lake near south shore. 1850 Comment
  JEPS28273  Agrostis idahoensis George W. Gillett 1957-7-22 877 Lassen near Snag Lake south shore (100 yards above lake); Lassen Volcanic National Park 1850 Comment
  UC1024658  Agrostis oregonensis Leo Whitney 1933-8-7 2194 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 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
  SEINET4341134  Agrostis pallens G. Schoolcraft 1994-7-6 2349 Lassen About 1.5 miles NE of Red Rock Lake 2042 Comment
  POM98581  Agrostis scabra F. W. Peirson 1926-6-22 6808 Lassen margin of Boiling Lake, Mt. Lassen National Park Comment
Read comments
Apr 23 2013
  CAS-BOT-BC138626  Agrostis stolonifera G. Schoolcraft 1999-9-8 2884 Lassen Along Susan River west of Susanville. 1341 Comment
  SEINET5335984  Agrostis stolonifera M. J. Williams 1974-7-26 74 -L-39 Lassen 2 mi. W of Hallelujah Junction, S of highway 70 1494 Comment
  UCD108003  Agrostis stolonifera Tim Kuhn 2006-7-25 57 Lassen Eagle Lake Ranger District. Comment
  POM75042  Aliciella lottiae Marcus E. Jones 1897-6-22 9875 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  CAS-BOT-BC267060  Alisma John Thomas Howell 1974-7-10 50546 Lassen Elysian Valley 1325 Comment
  CHSC111099  Alisma triviale Lowell Ahart; John Dittes 2012-7-9 18294 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
  SEINET8193719  Allium M. J. Williams 1969-6-14 s.n. Lassen Ravendale. 1615 Comment
  CHSC64855  Allium acuminatum Vernon H. Oswald 1995-6-26 6926 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 8.5 mi w of Madeline, ca. 1 mi e of the reservoir at Fleming Sheep Camp. 1670 Comment
  RSA32793  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen On an open slope east of Fredonyer Pass. 1646 Comment
  CAS-BOT-BC459568  Allium acuminatum A. A. Heller 1938-6-23 15196 Lassen 2 miles east of Fredonyer Summit on Highway #36, in the Arid Transition Life Zone. Comment
  RSA367043  Allium amplectens Anstruther Davidson s.n. Lassen [No locality information provided] Comment
  JEPS94130  Allium anceps Vernon H. Oswald and Lowell Ahart 1998-5-22 9102 Lassen ca. 3 mi. n. Doyle (Hackstaff Rd. 1.0 mi. s. of Laver Crossing Rd. 0.2 mi. n. of Fort Sage Rd.) 1316 Comment
  UC3055  Allium anceps Mrs. C. C. Bruce June, 1898 Lassen Madeline Plains Comment
  CHSC99735  Allium bisceptrum var. bisceptrum Lowell Ahart; John Dittes 2008-6-20 14975 Lassen Upland on the northeast side of Big Valley, about 5.3 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 8.3 miles (air) northeast of Bieber. 1287 Comment
  UC1133790  Allium campanulatum A. Simontacchi 1940-7-1 935 Lassen 2.6 mi ssw Puls Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1136928  Allium lemmonii L. R. Short 1936-6-10 S- 416 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1798 Comment
  UC1924588  Allium lemmonii Debra Valov 2006-5-29 2006018 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1271 Comment
  CAS-BOT-BC472753  Allium lemmonii Peter H. Raven; Otto T. Solbrig 1958-6-17 13288 Lassen Highway 395, 1.8 miles south of Ravendale Comment
  HSC22953  Allium lemmonii John Pratt 1970-6-21 32 Lassen 1707 Comment
  CAS-BOT-BC474046  Allium parvum Louella Bass s.n. Lassen Elysian Valley Comment
  CHSC68887  Allium platycaule Vernon Oswald; Lowell Ahart 1997-6-24 8624 Lassen South of Susanville on the north side of Diamond Mtn. On Forest Rd. 21N52, 1.0 mi southwest of its junction with 29N43. 2164 Comment
  POM110004  Allium platycaule Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CAS-BOT-BC474074  Allium platycaule John Thomas Howell; Gordon H. True 1973-9-1 s.n. Lassen Headwaters of Baxter Creek, Diamond Mts, Sierra Nevada 2164 Comment
  CAS-BOT-BC171316  Alnus incana subsp. tenuifolia John Thomas Howell; Gordon H. True 1973-8-1 50223 Lassen Headwaters of Boxter Creek, Canadian Zone forest, E slope of Diamond Range s of Susanville. Sierra Nevada Comment
  RSA0011565  Alopecurus R. F. Thorne, Larry E. DeBuhr 1975-8-22 46987 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line 1616 Comment
  UCD55830  Alopecurus aequalis L. Whitney 1933-8-4 2200 Lassen Lassen National Forest, ca. 8 miles northwest of Eagle Lake, Slate Creek. 1920 Comment
  UC1130817  Alopecurus geniculatus A. Simontacchi 1940-5-17 745 Lassen 5.9 mi. s. Patterson Mt.; Lassen Nat'l Forest, Halls Flat Quad. Comment
  JEPS107365  Alopecurus pratensis Lowell Ahart, John Dittes 2005-6-1 11868 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
  CHSC67189  Alyssum desertorum James D. Jokerst 1991-5-29 3317 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, E and adjacent to the highway +/- 200 m S of its junction with the road to the W across the N end of the Lake. 1584 Comment
  CHSC54178  Alyssum minus subsp. micranthum Vernon H. Oswald 1991-5-28 4629 Lassen South end of Elkins Ln (100 ft south of Modoc-Lassen county line), Ash Creek Wildlife Area, ca. 7 miles northeast of Bieber. In meadow. 1267 Comment
  CHSC67190  Alyssum minus subsp. micranthum James D. Jokerst 1991-5-28 3293 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, ca. 400 ft E of the highway on slopes above road, S of a small canyon mouth. 1554 Comment
  UC1924565  Alyssum minus subsp. micranthum Debra Valov 2006-5-28 2006037 Lassen Bieber off County Rd. A2 c. 12 km east of Hwy 299 1279 Comment
  JEPS93815  Alyssum simplex Vernon H. Oswald and Lowell Ahart 1998-6-4 9144 Lassen s of Constantia (at parking area at end of spur road on n side of Red Rock Road 0.6 mi e of Highway 395); Red Rock Road 1389 Comment
  JEPS117361  Amaranthus blitoides Lowell Ahart, John Dittes 2010-8-30 17090 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley 1274 Comment
  CHSC77181  Ambrosia acanthicarpa G. Schoolcraft 1998-9-14 2809 Lassen Flats N of Turtle Point. 1264 Comment
  SEINET3871758  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen Along State Hwy. 70 at Beckwourth Pass ca 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles E of Sierra Valley.; 0 1584 Comment
  UC1118423  Ambrosia acanthicarpa C. W. Hanks 1934-9-25 86 Lassen floor of, (near Plumas National Forest) Long Valley; Sierraville Quad., Plumas National Forest 1371 Comment
  UCD112860  Amelanchier alnifolia Beecher Crampton 1954-5-11 1881 Lassen Beckwourth Pass, Plumas. 1588 Comment
  POM253370  Amelanchier pallida A. A. Heller 1938-6-4 15144 Lassen 1 mile east of Fredonyer Pass on hwy 36. 1707 Comment
  UC1137669  Amelanchier utahensis George A. Fischer and Irwin H. Johnson 1933-7-14 F 270 Lassen Lassen Forest 1737 Comment
  UC12072  Amelanchier utahensis Mrs. R. M. Austin and Bruce Jun 1898 2338 Lassen Comment
  CAS-BOT-BC222251  Amsinckia Elmer I. Applegate 1934-5-4 8916 Lassen At south end of Secret Valley Comment
  CDA40473  Amsinckia menziesii var. menziesii L. Ahart, John Dittes 2005-6-1 11899 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. Comment
  UC198379  Amsinckia tessellata var. tessellata J. G. Lemmon Lassen Sierra and Long Valleys Comment
  UC585123  Amsinckia tessellata var. tessellata E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1747 Lassen e facing slope of gully on mountain above Red Rock 1432 Comment
  UC61145  Amsinckia tessellata var. tessellata Jos. Burtt Davy Lassen Honey Lake Valley Awadee Comment
  CAS-BOT-BC45257  Ancistrocarphus filagineus B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6562 Lassen US Highway 395, 6.0 km N of railroad crossing and 20.1 km N of Litchfield. 1330 Comment
  UC1562726  Angelica breweri Barbara Ertter 1988-7-25 7869 Lassen 1.5 mi e of Diamond Peak (10 air mi due s of Susanville, Diamond Mountains); Diamond Mountains 2255 Comment
  UC891493  Antennaria argentea C. L. Hitchcock 1940-5-26 6616 Lassen ca 12 mi n of, at lava beds Fall River Mills (Shasta Co.); Fall River 1371 Comment
  CAS-BOT-BC63875  Antennaria argentea C. L. Hitchcock 1940-5-26 6616 Lassen Ca. 12 miles north of Fall River Mills (Shasta Co.) on Fall River 1371 Comment
  CAS-BOT-BC63952  Antennaria argentea H. D. Ripley; R. C. Barneby 1944-5-29 5958 Lassen Susanville Comment
  SEINET6735052 Image available Antennaria corymbosa B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11496 Lassen Blue Door Flat, seven or eight miles east of HWY 295 on county road 510 1774 Comment
  CHSC7640  Antennaria dimorpha Beverley J. Wise 1969-4-13 11 Lassen 5.6 mi east of junction of Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1463 Comment
  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
  CAS-BOT-BC69137  Antennaria geyeri John Thomas Howell 1934-7-9 12520 Lassen Pine Creek Flat Comment
  SEINET3145605  Antennaria geyeri M. E. Jones 1897-6-25 sn Lassen Susanville 1341 Comment
  CAS-BOT-BC69142  Antennaria geyeri Christopher Davidson 1974-7-24 2487 Lassen jCa. 4 mi W of Janesville on rd to Antelope Valley 2133 Comment
  JEPS94608  Antennaria luzuloides Vernon H. Oswald and Lowell Ahart 1997-5-27 8506 Lassen on Forest Route 38N04 0.3 mi n Hwy. 139 ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat) n of Susanville, between road and small creek n) 1560 Comment
  RSA32730  Antennaria luzuloides A. A. Heller 1938-6-23 15189 Lassen State highway 36, about 4 miles east of Westwood Comment
  RSA702449  Antennaria luzuloides L. P. Janeway 2004-6-26 8167 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  UC1137667  Antennaria luzuloides L. R. Short and J. Warren 1936-6-23 S- 452 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1741 Comment
  UC773953  Antennaria luzuloides L. R. Short and J. Warren 1936-6-23 S- 452 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1741 Comment
  RSA637571  Antennaria luzuloides Michael A. Vincent 1999-6-9 8577 Lassen Bureau of Land Management land, Madeline Plains. Southwest of US Rt. 395, southeast of CR 515 (Termo Road), S of BLM road 1614, and southwest of Termo. Along jeep road to Schott Canyon. Comment
  CHSC92826  Antennaria luzuloides subsp. aberrans Lowell Ahart; John Dittes 2005-6-1 11862 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  JEPS95712  Anthemis cotula Vernon H. Oswald and L. Ahart 1995-8-14 7175 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a flooded playa (Mud Flat) 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville. Roadside weed. 1348 Comment
  CDA42997  Apera interrupta L. 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. Comment
  CHSC117198  Aphyllon fasciculatum Lowell Ahart; John Dittes 2016-6-7 20997 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  UC1123464  Apocynum androsaemifolium H. P. Hagge 1929-9-12 28 Lassen Logan Mt. Eagle Lake Quad., Logan Mt. Comment
  UCD21048  Apocynum androsaemifolium E. Bortiri 2002-7-19 WFC 84 Lassen Along Rd 35N08, about 8 miles North of Poison Lake and Hwy 44,. Comment
  CHSC12461  Aquilegia formosa var. truncata Robert W. Severin 1969-6-25 15 Lassen West side of Murrer's Upper Meadow. 2 mi ESE E.L.B.S. 1584 Comment
  CHSC4273  Aquilegia formosa var. truncata K. R. Stern 1967-6-24 2404 Lassen Murrer Meadow, ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  UC773931  Arabis L. R. Short 1936-6-1 S- 354 Lassen Burgess Spring Experiment Range Lassen Forest 1859 Comment
  SEINET10866232  Arabis Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2601 Lassen Hallelujah jct intersection of u.s. 395 And state hwy 70; in open waste area adjacent to artemisia tridentata comm. 1433 Comment
  RSA0129285  Arabis holboellii var. pinetorum R. C. Rollins, Kathryn W. Rollins 1981-5-31 81176 Lassen Just N of Eagle Lake. Comment
  RSA0129905  Arabis lemmonii var. depauperata Clare B. Hardham 1961-6-16 7442 Lassen Diamond Peak, Lassen/Plumas counties. Comment
  RSA0129096  Arabis oligantha Franklin P. Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  UC1504479  Arabis rectissima var. rectissima Reed C. Rollins and Kathryn W. Rollins 1981-5-31 81172 Lassen 2.2 mi n CA Hwy 36 junction with County Hwy A-1 Comment
  SEINET5340852  Arabis sparsiflora var. subvillosa R. C. Rollins, K. W. Rollins 1981-5-31 81178 Lassen Just north of Eagle Lake. Comment
  SEINET1916077  Arceuthobium abietinum R. L. Mathiasen 2010-1 1061 Lassen 0.3 km W of Fredonyer Pass on Rte. 36; On Abies Iowiana 1660 Comment
  CAS-BOT-BC409989  Arceuthobium campylopodum John Thomas Howell 1973-7-10 49787 Lassen Fredonyer Pass 1737 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
  SD64322  Arctium minus Darley F. Howe 1966-8-24 Lassen 32 miles northeast of Litchfield on Hwy #395. 1399 Comment
  RSA38477  Arctostaphylos manzanita subsp. manzanita P. A. Munz 1947-5-18 11865 Lassen Fredonyer Forestry Public Camp Ground, west of Susanville. 1509 Comment
  CAS-BOT-BC45906  Arctostaphylos nevadensis Marcus E. Jones 1897-7-7 s.n Lassen Lassen's Peak 1828 Comment
  CAS-BOT-BC45910  Arctostaphylos nevadensis Hans Leschke 1957-7-12 s.n Lassen Above Cold Boiling Lake 2316 Comment
  CAS-BOT-BC45911  Arctostaphylos nevadensis Jeanne Janish; Carl Janish 1938-9-4 s.n Lassen Above upper Twin Lake, Lassen National Park 2042 Comment
  CAS-BOT-BC42164  Arctostaphylos patula subsp. patula Louella Bass 1974-4-15 151 Lassen Elysian Valley 1325 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
  UCR18731  Arenaria congesta Frank C. Vasek 1975-7-11 750711- 07 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  JEPS28438  Arenaria congesta var. congesta George W. Gillett 1957-7-29 945 Lassen Along trail between Butte Lake Snag Lake; Lassen Volcanic National Park 1859 Comment
  UC506974  Arenaria congesta var. congesta George A. Fischer, Irwin H. Johnson 1933-7-12 f 223 Lassen Lassen Forest 1728 Comment
  UC8100  Arenaria congesta var. congesta M. S. Baker and Frank Nutting 1894-7-3 Lassen Dixey Mts. Comment
  SEINET3070906 Image available Arenaria congesta var. simulans A. A. Heller 1938-6-23 15198 Lassen East of Fredonyer Pass 1650 Comment
  RSA0002312  Arenaria congesta var. simulans A. A. Heller 1938-6-23 15198 Lassen On an open slope east of Fredonyer Pass. 1646 Comment
  UC726207  Arenaria congesta var. subcongesta A. A. Heller 1938-6-23 15198 Lassen e Fredonyer Pass 1645 Comment
  UC8098  Arenaria congesta var. subcongesta M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  UC584297  Arenaria congesta var. suffrutescens G. L. Stebbins Jr. and J. A. Jenkins 1937-7-6 2206 Lassen just w of the town on Inspiration Point; Susanville 1280 Comment
  RSA647527  Argemone munita subsp. rotundata Marion P. Harthill 1972-6-16 789 Lassen Doyle. Comment
  JEPS124519 Image available Argemone platyceras var. hispida P. C. Billigs 1965-7-12 77 Lassen 1.8 mi south of MIlford on Hwy 395 Comment
  SEINET10940510  Argemone platyceras var. hispida Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 864 Lassen Collected on raod bank 24 mi n of calif state line of hwy 395. Comment
  CHSC60873  Arnica chamissonis Vernon H. Oswald; Lowell Ahart 1993-7-8 5665 Lassen Pittville Rd. (Lassen 111, 36N01) 2.4 mi N of Hwy. 44, on the NE edge of Poison Lake. 1705 Comment
  UC1142923  Arnica chamissonis A. L. Hormay 1941-6-23 8 Lassen Little Harvey Valley Lassen National Forest, Little Harvey Valley 1676 Comment
  UC73900  Arnica chamissonis J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  POM203853  Arnica chamissonis subsp. foliosa J. T. Howell 1934-7-8 12512 Lassen Harvey Valley Comment
  UCR7843  Arnica longifolia Marilyn Malin 1968-6-27 257 Lassen Lassen National Forest. Papoose Valley Meadow [Papoose Meadows, along Papoose Creek south of Eagle Lake, 2 mi south of Gallatin Beach.] 1620 Comment
  CHSC66715  Arnica mollis Vernon H. Oswald; Lowell Ahart 1996-8-1 8123 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. 1737 Comment
  CAS-BOT-BC85028  Arnica sororia Clarence Quick 1963-7-12 63 -37 Lassen Black Mountain Experimental Forest east of Halls Flat 1859 Comment
  UCD129188  Artemisia arbuscula F. C. Raney 1966-6-25 s. n. Lassen Harvey Valley, Lassen National Forest. Comment
  CHSC118794  Artemisia arbuscula subsp. arbuscula L. P. Janeway; B. Castro 2015-6-5 11766 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 7.4 road-km south of Surprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CHSC72214  Artemisia arbuscula subsp. arbuscula Vernon H. Oswald 1998-9-14 9621 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  UC747143  Artemisia arbuscula subsp. arbuscula G. Thomas Robbins 1945-10-18 2156 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  UC773844  Artemisia arbuscula subsp. arbuscula L. R. Short 1936-9-30 S- 506 Lassen Burgess Spring Experimental Range Lassen National Forest, Burgess Spring Experimental Range 1746 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
  UC747153  Artemisia cana subsp. bolanderi G. Thomas Robbins 1945-10-18 2157 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  CHSC5196  Artemisia ludoviciana M. West 1946-7-9 Lassen Eagle Lake. Pine Creek, Eagle Lake. 1580 Comment
  CAS-BOT-BC90830  Artemisia nova Arnold Tiehm; Gary Schoolcraft 2003-9-11 14368 Lassen 2.9 road miles N of Karlo Road on highway 395 from Litchfield to Alturas, just east of the highway 1402 Comment
  SEINET263201  Artemisia nova J. Lyman 1994-4-23 4242 Lassen Along Highway 395, ca. 25 miles north of Susanville on intersecting BLM road 1433 Comment
  CHSC64749  Artemisia spinescens Vernon H. Oswald 1995-5-24 6772 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 0.4 mi e of the e end of Amedee Rd. (6.1 mi e of Wen-del). 1219 Comment
  UCD149841  Artemisia spinescens William Anderson 1965-4-20 s.n. Lassen Wendel. Comment
  CHSC13797  Artemisia tridentata Cathy Crittenden 1970-7-8 28 Lassen Approx. 100 yds north of E. L. B. S. 1524 Comment
  CAS-BOT-BC97326  Artemisia tridentata subsp. tridentata Clare B. Hardham 1971-8-22 18395 Lassen Diamond Mountain 2346 Comment
  CAS-BOT-BC97328  Artemisia tridentata subsp. tridentata L. S. Smith 1918-8-11 1026 Lassen Modoc National Forest, Camp One 2529 Comment
  CHSC110309  Artemisia tridentata subsp. tridentata L. P. Janeway; B. Castro 2012-7-2 10927 Lassen Modoc Plateau. Eastern end of Amedee Mountains; along Ske-daddle Ranch Road (#26020) at the road to South Fork Reservoir, 6.1 road km north of the Wendel Road. 1473 Comment
  JEPS124637 Image available Artemisia vulgaris Dixie Funnell 1965-7-13 137 Lassen Growing under bridge about 4 feet from the water. Highway 299, under bridge 705 for pit overflow. Comment
  CHSC6222  Asclepias fascicularis M. West 1946-7-10 Lassen Pine Creek, Eagle Lake. 1584 Comment
  JEPS49969  Asclepias fascicularis Brown and Wieslander 1922-7-25 31 Lassen Martin Sprs. Eagle Lake Comment
  CHSC6223  Asclepias speciosa M. West 1946-7-7 Lassen Eagle Lake 1584 Comment
  UC1096430  Asclepias speciosa George A. Fischer, Irwin H. Johnson 1933-7-29 F- 276 Lassen Stringer Lassen National Forest 1694 Comment
  CAS-BOT-BC478834  Asparagus officinalis John Thomas Howell 1975-7-23 51397 Lassen Susanville, Sierra Nevada 1295 Comment
  POM181067  Aster M. S. Jussel 1931-9-6 s.n. Lassen Sulphur Works, Mt. Lassen 2134 Comment
  POM39868  Aster campestris Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 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
  RSA503251  Aster integrifolius Bruce Bartholomew, B. Anderson 1988-7-22 4502 Lassen Mosquito Creek, 2km SW of Patterson Meadow, southern end of the Warner Mtn. 2080 Comment
  UCR73175  Astragalus G. L. Webster 1989-5-13 7710 Lassen 2.5 mi. east of Beckworth Pass 1500 Comment
  UC13379  Astragalus agrestis Mrs. R. M. Austin and Bruce June 1898 2211 Lassen Madaline Plains Comment
  CAS-BOT-BC177438  Astragalus andersonii Alice Eastwood; John Thomas Howell 1940-6-16 8351 Lassen Omira Comment
  CDA26597  Astragalus andersonii L. Ahart, J. Dittes 2005-6-1 11917 Lassen On the east side of a poor road, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. Comment
  CHSC116920  Astragalus andersonii J. P. Bergmann 2011-4-30 Lassen Fort Sage OHV Recreation Area. 1450 Comment
  JEPS107690  Astragalus andersonii Lowell Ahart, John Dittes 2005-6-1 11917 Lassen Long Valley, along the east side of a poor road, about 4 1/2 (air) miles north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  UC84393  Astragalus andersonii T. Brandegee 1892-6-30 Lassen Janesville Comment
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  CAS-BOT-BC177434  Astragalus andersonii John Wynn Gillespie; Doris Kildale Gillespie 1930-5-14 9378 a Lassen 5 miles west of Susanville on Red Bluff road Comment
  CDA26599  Astragalus andersonii T. C. Fuller 1965-6-3 13608 Lassen Driveway to the cemetery, Janesville. 0 Comment
  UC1483838  Astragalus anxius G. Schoolcraft 1980-8-14 307 Lassen w of Madeline; Ash Valley 1548 Comment
  NY790602  Astragalus argophyllus var. argophyllus A. Tiehm 1986-5-12 10347 Lassen 1 road mile west of the state line on the dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341.1 Comment
  CAS-BOT-BC178762  Astragalus canadensis var. brevidens John Thomas Howell 1934-7-8 12504 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC178767  Astragalus canadensis var. brevidens Leo Whitney 1934-7-4 2073 Lassen Sand dunes near north shore of Eagle Lake, Lassen N.E. 158 Comment
  POM26215  Astragalus canadensis var. brevidens R. M. Austin 1883-09 42 Lassen Madaline Plains Comment
  UC1553369  Astragalus canadensis var. brevidens Gary Schoolcraft 1988-7-7 1821 Lassen Madeline Plains n of Observation Peak and Horne Ranch Rd.; Madeline Plains n of Observation Peak 1645 Comment
  SEINET10486010  Astragalus curvicarpus Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 862 Lassen Collected on road bank 24 mi n of california state line on hwy 395. Comment
  SEINET5325001  Astragalus curvicarpus M. J. Williams, J. T. Howell 1973-5-12 73 C-16 Lassen Near Herlong turn-off, Hwy. 395. 1250 Comment
  SEINET948261  Astragalus curvicarpus Ira. L. Wiggins, Dorothy B. Wiggins 1961-1 16331 Lassen Gravelly slopes at margin of grain field 13.5 mi. E of Susanville, sec 36 Comment
  CAS-BOT-BC177845  Astragalus curvicarpus var. curvicarpus Alice Eastwood; John Thomas Howell 1940-6-16 8336 Lassen Near Susanville Comment
  CHSC23432  Astragalus curvicarpus var. curvicarpus K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5816 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  UC1128891  Astragalus curvicarpus var. curvicarpus A. Simontacchi 1940-6-8 840 Lassen 1.9 mi ne Ebey Lake; Halls Flat Quad., Lassen National Forest, ne of Ebey Lake Comment
  RSA59356  Astragalus curvicarpus var. curvicarpus E. K. Balls 1950-5-21 14825 Lassen Near Standish, Hwy 395, 7 miles from jct of Hwy 36 and 395. 1250 Comment
  SEINET7103990  Astragalus curvicarpus var. curvicarpus T. N. Kaye 1990-6-27 1254 Lassen Ash Valley Road, 16 miles east of Adin.; 0 Comment
  CHSC37299  Astragalus filipes M. S. Taylor; B. Hammond 1982-7-8 4790 A Lassen At gate near RR Xing just off Scott Rd, ca. 5 mi s of Constantia. 1402 Comment
  RSA111070  Astragalus filipes H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5675 Lassen South of Constantia. 1463 Comment
  RSA639010  Astragalus filipes Michael A. Vincent 1999-6-9 8579 Lassen Bureau of Land Management land, Madeline Plains: SW of US Rt 395, SE of CR 515 (Termo road), S of BLM road 1614, and SW of Termo. Along jeep road to Schott Canyon. Comment
  SEINET231384 Image available Astragalus filipes Margaret J. Williams 1983-7-31 83- 125 -1 Lassen Ash Valley Road, 17 mi from Aden 1829 Comment
  CAS-BOT-BC186861  Astragalus gibbsii Philip A. Munz 1947-5-20 11889 Lassen Milford 1264 Comment
  CHSC63395  Astragalus gibbsii V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6355 Lassen Ash Valley between Adin and Madeline, ca. 0.5 mi along the road leading SE from the right-angle turn on Lassen 527 near the gravel pit. 1554 Comment
  RSA111016  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 5749 Lassen West of Susanville 1311 Comment
  RSA0006769  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 s.n. Lassen West of Susanville. Comment
  POM23664  Astragalus iodanthus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 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
  UC13384  Astragalus lemmonii M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  CHSC12428  Astragalus lentiginosus Robert W. Severin 1969-6-25 54 Lassen 2/3 mi. ne E.L.B.S. on edge of road. 1577 Comment
  CHSC110304  Astragalus lentiginosus var. floribundus L. P. Janeway; B. Castro 2012-7-2 10929 Lassen Modoc Plateau. East side of Skedaddle Mountains; along Skedaddle Road 19.6 road km north of the Wendel Road; about 1.0 km south of Skedaddle Creek; at the Nevada state line. 1542 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
  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
  UC1537105  Astragalus lentiginosus var. floribundus Gordon H. True Jr. 1938-7-8 903 Lassen n Hot Spring Mountain (Mud Flat); n of Hot Spring Mountains, Mud Flat 1371 Comment
  CAS-BOT-BC187161  Astragalus lentiginosus var. floribundus H. D. Ripley; R. C. Barneby 1943-6-13 5678 Lassen N. of Doyle 1264 Comment
  CHSC60900  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald 1993-7-8 5663 Lassen Pittvile Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CHSC828  Astragalus lentiginosus var. lentiginosus 1944-6-26 Lassen Eagle Lake. 1584 Comment
  UC1609460  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald and Lowell Ahart 1993-7-8 5663 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi n Hwy 44 (se edge Poison Lake); se edge Poison Lake 1709 Comment
  RSA0006801  Astragalus lentiginosus var. lentiginosus H. D. Ripley, R. C. Barneby 1943-6-14 5724 Lassen Mountains W of Susanville 1448 Comment
  POM26311  Astragalus lentiginosus var. platyphyllidius Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  POM280735  Astragalus lentiginosus var. salinus Alice Eastwood, John T. Howell 1940-6-16 8335 Lassen Near Susanville. Comment
  RSA0059601  Astragalus lentiginosus var. salinus Lowell Ahart, John Dittes 2011-6-20 17510 Lassen Near edge of the Ash Valley Road, 3,210 feet south of the Ash Creek Campground, about 6.5 (air) southeast of Adin. 1511 Comment
  CAS-BOT-BC192842  Astragalus pulsiferae Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  CAS-BOT-BC192847  Astragalus pulsiferae H. D. Ripley; R. C. Barneby 1944-5-30 5967 Lassen North of Secret Valley 1615 Comment
  SEINET4853425  Astragalus pulsiferae var. coronensis Unknown 2001-6-14 28158 Lassen E of Hwy 395, rd to Rams Horn Spring campground. 1540 Comment
  NY694125  Astragalus pulsiferae var. pulsiferae H. D. D. Ripley 1943-6-7 5499 Lassen East side of Beckworth Pass, south Lassen Co. 1494 Comment
  RSA0006848  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1943-6-17 5799 Lassen East side of Beckwourth Pass. 1494 Comment
  HSC82244  Astragalus purshii var. lectulus Thomas W. Nelson, Jane P. Nelson 1980-7-6 5989 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 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
  CAS-BOT-BC194096  Astragalus purshii var. purshii Alice Eastwood; John Thomas Howell 1940-6-16 8345 Lassen Jonesville Comment
  JEPS114761  Astragalus purshii var. tinctus Lowell Ahart, John Dittes 2008-6-19 14888 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  UC604677  Astragalus purshii var. tinctus Farris Farris 1935-5-20 Lassen three mi sw Susanville; sw of Susanville 1310 Comment
  RSA38443  Astragalus purshii var. tinctus P. A. Munz 1947-5-19 12269 Lassen Hwy 395, 3.5 miles S of Ravendale. 1616 Comment
  RSA26502  Astragalus whitneyi Marcus E. Jones 1897-6-30 s.n Lassen Susanville; 7 miles below Eagle Lake. 1524 Comment
  RSA639008  Astragalus whitneyi Michael A. Vincent 1999-6-9 8576 Lassen Bureau of Land Management land, Madeline Plains: SW of US Rt 395, SE of CR 515 (Termo road), S of BLM road 1614, and SW of Termo. Along jeep road to Schott Canyon. Comment
  CDA7885  Astragalus whitneyi var. confusus G. Schoolcraft 1985-5-22 s.n. Lassen Along A2 about 5 miles S of Adin, CA. Comment
  CAS-BOT-BC200873  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch 2225 Comment
  JEPS94136  Athysanus pusillus Vernon H. Oswald and Lowell Ahart 1998-5-22 9130 Lassen ca. 5 mi. n.e. Doyle (rd. to Summit of Fort Sage Mts., 2.7 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1463 Comment
  OBI75877  Athysanus pusillus Anthony Baniaga 2011-6-29 399 Lassen Lassen Natl Forest. Fredonyer Pass, S of Willard ck. Fredonyer Pass quad T29N R10E sec 14 NW of SE 1500 Comment
  RSA38479  Athysanus pusillus P. A. Munz 1947-5-18 11863 Lassen Fredonyer Forestry Public Camp Ground. W of Susanville. 1509 Comment
  JEPS29746  Atriplex confertifolia Rimo Bacigalupi and L. R. Heckard 1962-5-28 8501 Lassen along road from U.S. 395 past Wendel and Flanagan to Pyramid Lake, Nevada, 2 mi e Wendel junction (n of Honey Lake); , e of Wendel junction 1219 Comment
  RSA3150  Atriplex confertifolia C. B. Wolf 1931-9-5 1278 -1279 Lassen Honey Lake Valley, 1/2 mile from Amedee R.R. Station on road to Doyle. 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
  UC769938  Atriplex confertifolia R. F. Hoover 1940-10-5 4663 Lassen Wendel Comment
  JEPS94696  Atriplex gmelinii var. gmelinii Vernon H. Oswald and Lowell Ahart 1998-9-8 9581 Lassen 2.2 mi n of Bieber (on County Road 91 (Bieber-Lookout Road)); Ash Creek and Big Swamp, County Road 91 1258 Comment
  CHSC76273  Atriplex rosea Lowell Ahart; Vernon H. Oswald 1999-9-13 8203 Lassen On the east side of the dirt road and 1/2 mile south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  RSA518558  Atriplex rosea George K. Helmkamp 1990-9-23 H- 7 Lassen N of Ravendale 1677 Comment
  UC1136349  Atriplex truncata E. Sawyer 1935-6-27 217 Lassen Long Valley Sierraville Quad., Long Valley Comment
  CAS-BOT-BC106496  Balsamorhiza hookeri Doris Kildale Gillespie 1930-5-13 9363 Lassen Between Susanville and Janesville Comment
  NY119710  Barbarea orthoceras N. H. Holmgren 1978-6-11 8919 Lassen Vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28 km (17.4 mi.) E of Ravendale and 22.5 km (14 mi.) airline distance 1680 Comment
  NY119712  Barbarea orthoceras var. dolichocarpa J. T. Howell 1973-6-28 49464 Lassen Elysian Valley, W of Janesville 1325.9 Comment
  CHSC76094  Bassia hyssopifolia Lowell Ahart 1999-9-13 8206 Lassen On the east side of the dirt road and 1/2 mile south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  CAS-BOT-BC145783  Beckmannia syzigachne A. A. Beetle 1941-6-28 2813 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  HSC9041  Beckmannia syzigachne Fred Kindel 1955-6-24 Lassen Mt.Meadows Reservoir Comment
  CHSC96767  Berteroa incana D. McDonald 2005-7-18 1307852 Lassen Modoc Plateau. Lassen County. Hallelujah Junction. Comment
  SEINET3100770 Image available Berteroa incana Arnold Tiehm 2005-7-14 15023 Lassen Long Valley, Anderson (Saralegui) Ranch, 2.2 road miles W of highway 395 on highway 70 then 5.5 road miles N on Scott Road. 1490 Comment
  UCR182884  Berteroa incana D. Mcdonald 2005-7-18 PDR 1307852 Lassen Modoc Plateau, Hallelujah Junction Comment
  CAS-BOT-BC169400  Betula glandulosa John Thomas Howell 1934-7-9 12514 Lassen Bridge Creek Spring Comment
  UC1037310  Betula glandulosa Leo Whitney 1934-7-31 1806 Lassen 7-8 mi sw Eagle Lake (moist stream bank); Lassen National Forest, Bridge Creek, Bridge Creek Camp 1737 Comment
  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
  HSC42543  Bidens cernua Barbara Kelly 1977-8-9 563 Lassen 15 miles east of Madeline on a dirt road from Adin Comment
  CHSC65292  Bidens cernua var. cernua Vernon H. Oswald 1995-8-21 7205 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Likely. 1859 Comment
  CAS-BOT-BC128033  Blepharipappus scaber Clare B. Hardham 1961-6-16 7451 Lassen Gold Run Creek south of Susanville Comment
  CAS-BOT-BC128044  Blepharipappus scaber John Thomas Howell 1934-6-10 11894 Lassen Horse Lake Comment
  CAS-BOT-BC128048  Blepharipappus scaber A. M. Vollmer; L. Beane 1953-7-1 99 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC48131  Blepharipappus scaber Vernon H. Oswald 1986-6-15 2112 Lassen Hwy 36, 15.0 mi E of Plumas-Lassen Co. line, 3.5 mi E of Fredonyer Pass. 1508 Comment
  JEPS114752  Blepharipappus scaber Lowell Ahart, John Dittes 2008-6-19 14876 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
  SFV3785  Blepharipappus scaber I. L. Wiggins, D. B. Wiggins 1961-6-11 16355 Lassen East of Eagle Lake, 2 miles north of Susanville. Roadside. 1340 Comment
  UC1119057  Blepharipappus scaber A. Simontacchi 1940-7-8 5575 Lassen 5.1 mi s of Jelly Camp (Halls Flat); Halls Flat 1699 Comment
  UC194505  Blepharipappus scaber unknown 1878-4-1 Lassen Madeline Plains Comment
  UC577280  Blepharipappus scaber David D. Keck and J. Clausen 1935-6-24 3733 Lassen 2 mi s of Ravendale 1463 Comment
  CDA10533  Blepharipappus scaber T. C. Fuller 1963-6-1 10620 Lassen Road to Susanville, 2.0 miles south of Pittville. 0 Comment
  OBI48164  Blepharipappus scaber Rhonda Riggins 1989-4-27 1640 Lassen US 395, 8.4 mi N Litchfield, 26.6 mi S Ravendale 1311 Comment
  RSA152683  Blepharipappus scaber I. L. Wiggins, Dorothy Wiggins 1961-6-11 16355 Lassen Roadside east of Eagle Lake, 2 miles north of Susanville. Comment
  RSA603799  Blepharipappus scaber D. D. Keck, Jens Clausen 1935-6-24 3725 Lassen 5 miles south of Likely. 1402 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
  SEINET7379359 Image available Blepharipappus scaber subsp. scaber J. A. Young 1982-6-9 s.n. Lassen Myers Ranch, Adin 1372 Comment
  CAS-BOT-BC14088  Boechera pauciflora John Thomas Howell 1974-7-9 50484 Lassen Between Susanville and southwest end of Eagle Lake. 1828 Comment
  CHSC13946  Boechera pinetorum M. S. Taylor 1974-7-12 313 Lassen Above road bank by Clear Lake in Lassen National Forest. Comment
  CAS-BOT-BC14637  Boechera rectissima John Thomas Howell; Gordon H. True 1973-7-31 50063 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 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
  CHSC107324  Boechera retrofracta Lowell Ahart; John Dittes 2011-6-20 17509 Lassen Graded edge of the Ash Valley Road, 3,120 feet south of Ash Creek Campground, about 6.5 miles (air) southeast of Adin. 1511 Comment
  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
  JEPS94610  Boechera sparsiflora Vernon H. Oswald and Lowell Ahart 1997-5-27 8512 Lassen on Forest Route 38N04 1.4 mi e Hwy. 139 ((between Hwy 139 near Willow Springs Guard Station and Coyote Flat), n of Susanville) 1645 Comment
  CAS-BOT-BC25706  Boechera sparsiflora Reed Clark Rollins; Kathryn W. Rollins; Aileen Roads 1983-7-5 83226 Lassen Plumas National Forest. Above Laufman Ranger Station. 4.5 miles east of US Highway 395. Comment
  OBI48088  Boechera sparsiflora Rhonda Riggins 1989-4-27 1649 Lassen US 395, 1.1 mi N Madeline, 8.8 mi S Modoc Co. line 1676 Comment
  CAS-BOT-BC25935  Boechera suffrutescens Blanche Clear 1940-7-25 s.n. Lassen Volcanic Park. Cinder Cone. Comment
  POM46125  Boisduvalia glabella Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  POM254312  Boisduvalia macrantha Alice Eastwood, John Thomas Howell 1940-6-11 7973 Lassen Big Valley Mountains. Comment
  RSA166311  Boisduvalia stricta D. M. Moore 1960-6-4 123 Lassen U.S. 299, 6.5 mi. NE of McArthur Comment
  UC2046019  Bolboschoenus maritimus subsp. paludosus Nick Otting, Carex Working Group 2003-7-19 708 Lassen Modoc Plateau, Biscar Reservoir, 19 air miles northeast of Susanville. Comment
  RSA712894  Brodiaea coronaria subsp. coronaria L. P. Janeway 2005-7-3 8455 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
  CAS-BOT-BC149498  Bromus briziformis Louella Bass 1982-6-20 s.n. Lassen 0.5 mile west of Karls. Comment
  UCD32673  Bromus briziformis Beecher Crampton 1954-7-6 2077 Lassen Lassen County, 15 miles south of Ravendale, along US highway 395. 1676 Comment
  UCR119112  Bromus carinatus Beecher Crampton 1954-7-5 2055 Lassen Modoc Plateau, 4.5 miles west of Susanville, along state highway 36 1433 Comment
  CHSC118475  Bromus carinatus var. marginatus Don Lepley 2016-7-20 Lassen Eagle Lake Ranger District. Uphill side of Road 29N43.2 at outlet of Aspen Flat (tributary to Baxter Creek). 2026 Comment
  UCD59149  Bromus carinatus var. marginatus H. P. Hagge 1929-9-16 s.n. Lassen Logan Mtn. 1828 Comment
  JEPS96125  Bromus commutatus Vernon H. Oswald and Lowell Ahart 1996-6-17 7788 Lassen 7 mi w of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy 36, trail at hwy 36 bridge spanning Susan River); Modoc Plateau, Bizz Johnson Trail 1402 Comment
  UCD58463  Bromus commutatus L. D. Whitney 1935-6-23 s.n. Lassen Fruit Growers Supply Co., Camp #10. Comment
  UC1037142  Bromus orcuttianus Leo Whitney 1935-6-25 3338 Lassen Ashurst Mountain Comment
  UC1131325  Bromus suksdorfii A. Simontacchi 1940-6-8 836 Lassen Lassen National Forest, Halls Flat Ranger Station Halls Flat Ranger Station; Lassen National Forest, Halls Flat Ranger Station 1706 Comment
  CAS-BOT-BC161417  Bromus tectorum John Thomas Howell 1977-6-22 s.n. Lassen Sierra Nevada. About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek. 1432 Comment
  CHSC106583  Bromus tectorum Zachary Garcia 2008-4-8 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  NY664614  Bromus tectorum See comments 1935-6-15 Lassen Susanville 1310.6 Comment
  RSA715626  Bromus tectorum L. Ahart, John Dittes 2005-6-1 11909 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. Comment
  UC1024646  Bromus tectorum Leo Whitney 1933-7-8 2209 Lassen 8 mi nw of Eagle Lake (Lassen National Forest, Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  UCD59756  Bromus tectorum August L. Hormay 1932-5-20 s.n. Lassen Lassen National Forest. Hat Creek. Comment
  RSA0000410  Calamagrostis micrantha var. sierrae Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  HSC95308  Calamagrostis stricta subsp. inexpansa Gordon Leppig, Kai Neander, Juli Neander 1997-7-25 685 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1142960  Calamagrostis stricta subsp. inexpansa A. L. Hormay 1941-6-26 29 Lassen Westwood Junction Lassen National Forest 1737 Comment
  CHSC68744  Callitriche hermaphroditica Vernon H. Oswald; Lowell Ahart 1997-5-27 8514 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy. 139. 1682 Comment
  CHSC29951  Callitriche verna Robin L. Ondricek 1978-7-5 94 Lassen At the edge of Mahogany Lake at the ne end. 2057 Comment
  CHSC66239  Callitriche verna Vernon H. Oswald; Lowell Ahart 1996-6-24 7870 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. In or along Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  POM312337  Callitriche verna Verne Grant, H. L. Mason 1947-7-9 13294 Lassen 5 miles E of Bieber. Comment
  RSA233787  Callitriche verna R. F. Thorne, C. W. Tilforth 1969-9-5 39133 Lassen Said Valley Reservoir: Near junction of Grasshopper Road and Highway 139. 1433 Comment
  UC1101519  Callitriche verna Herbert L. Mason and Verne Grant 1947-7-9 13294 Lassen 5 mi e Bieber Comment
  CAS-BOT-BC332740  Callitriche verna R. F. Thorne; Larry E. DeBuhr 1975-8-22 46986 Lassen Along Hwy 395 ca 6 miles N of Medeline and 4.5 miles S of Modoc county line 1615 Comment
  CAS-BOT-BC80346  Calocedrus decurrens John Thomas Howell 1976-7-19 51964 Lassen on Gold Run Creek southwest of Susanville 1386 Comment
  CHSC6217  Calocedrus decurrens P. Balch 1955-7-18 Lassen Willow Creek, Eagle Lake. 1463 Comment
  SEINET10531060  Calocedrus decurrens Katherine L. Morris 1973-5-25 Morris 226 Lassen Collected in an area of sugar pine, Libocedrus, and yellow pine. 2.5 mi N of Jct 36 & Hwy 44. Comment
  SEINET8196128  Calochortus coeruleus C. G. Gulling 1905-1 1535 Lassen Big Meadows. Comment
  UC119897  Calochortus macrocarpus T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  CAS-BOT-BC273284  Calycadenia fremontii Barrett Anderson 1986-7-9 3125 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  JEPS17206  Calyptridium umbellatum Frances D. Payne 1929-7-12 101 Lassen Lost Lake, Camp I Lost Lake; Warner Mountains, , Camp I 2286 Comment
  HSC17647  Calyptridium umbellatum Fred J. Kindel 1955-6-8 Lassen Westwood Comment
  SEINET194898  Calyptridium umbellatum A. A. Heller 1938-6-22 15139 Lassen 1 mi E of Westwood along St Hwy 36 1524 Comment
  HSC30047  Camassia quamash subsp. breviflora D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19197 Lassen Harvey Valley near Cone Springs Comment
  CAS-BOT-BC497555  Camassia quamash subsp. breviflora G. S. Crew 1927-6-10 55836 Lassen Norval flat Comment
  CHSC20416  Camassia quamash subsp. quamash K. R. Stern 1967-6-25 2431 Lassen On road to Eagle Lake Biological Station, ca. 7 mi. S of Eagle Lake. 1828 Comment
  CHSC64770  Camelina microcarpa Vernon H. Oswald 1995-5-31 6807 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 1.3 mi e of Hwy. 395, between Litchfield and Ravendale. 1353 Comment
  SBBG70392  Camelina sativa subsp. sativa H. and M. Dearing 1939-6-6 3564 Lassen Bieber Comment
  SEINET3282784 Image available Camissonia boothii subsp. alyssoides Marcus E. Jones 1897-6-23 Lassen Amedee. 1219 Comment
  RSA38439  Camissonia claviformis subsp. cruciformis P. A. Munz 1947-5-19 11873 Lassen 19 miles south of Ravendale. 1341 Comment
  JEPS107466  Camissonia parvula Lowell Ahart, John Dittes 2005-6-1 11852 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
  JEPS107981  Camissonia parvula Lowell Ahart, John Dittes 2005-6-2 11938 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the interesection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1600 Comment
  RSA17675  Camissonia parvula Elmer I. Applegate 1934-5-4 8930 Lassen Secret Valley Comment
  RSA74347  Camissonia subacaulis Milo S. Baker 1952-5-23 12418 Lassen Wet Spot, E of Chester, Hwy 36. Comment
  RSA0011501  Camissonia tanacetifolia Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46978 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CAS-BOT-BC160835  Camissonia tanacetifolia subsp. quadriperforata John Thomas Howell 1934-6-10 11857 Lassen 3 miles n. of Omira Comment
  RSA12158  Camissonia tanacetifolia subsp. quadriperforata Wayne E. Sawyer 1935-6-27 219 Lassen Long Valley. 1311 Comment
  CAS-BOT-BC160863  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell 1934-7-8 12505 Lassen Spalding's, Eagle Lake Comment
  CAS-BOT-BC160871  Camissonia tanacetifolia subsp. tanacetifolia Peter H. Raven; Otto T. Solbrig 1958-6-17 13264 Lassen Along United States Highway 395, 11.8 miles north-east of LItchfield Comment
  JEPS124378  Capsella bursa-pastoris Lowell Ahart, John Dittes 2015-7-13 20308 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UC197292  Cardamine breweri Franklin P. Nutting Lassen Pine Creek Comment
  CHSC61025  Cardamine breweri var. breweri Vernon H. Oswald; Lowell Ahart 1993-8-3 5743 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. At the SW edge of the swamp. 1932 Comment
  CHSC99732  Cardamine oligosperma Lowell Ahart; John Dittes 2008-6-20 14942 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  CHSC85992  Carex angustata L. P. Janeway 2003-7-24 7912 Lassen High Cascade Range. At lower end of a meadow and marsh along Bridge Creek 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  UC142947  Carex angustata A. L. Hormay 1941-6-18 5 Lassen Little Harvey Valley Lassen National Forest, Little Harvey Valley 1676 Comment
  UC1776659  Carex aquatilis var. aquatilis Jenn Atchley 1993-5-5 1 Lassen Along willow creek, in watering gap, petroglyphs. 1219 Comment
  CAS-BOT-BC18107  Carex athrostachya James Stokes 1939-6-15 s.n. Lassen Bullard Lake west of Grasshopper Valley. Comment
  CHSC60428  Carex athrostachya Mary Ann Showers 1992-6-13 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  SEINET7550662 Image available Carex athrostachya L. P. Janeway 2004-6-26 8158 Lassen High Cascade Range. At Patterson Well in Patterson Flats; Black Mountains Experimental Forest. Poison Lake 7.5' quad. 1767 Comment
  UC1537643  Carex athrostachya Gordon H. True Jr. 1939-6-15 994 Lassen Bullard Lake, W of Grasshopper Valley Comment
  CAS-BOT-BC19067  Carex aurea John Thomas Howell 1976-7-19 51969 Lassen Sierra Nevada. On Gold Run Creek southwest of Susanville. 1386 Comment
  HSC95154  Carex cusickii Gordon Leppig 1998-7-12 936 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC2031876  Carex densa Nick Otting and Bruce Newhouse 2003-7-17 703 Lassen Cascade Mountains, Susan River, 2 air miles west of Susanville. Comment
  HSC82188  Carex douglasii Thomas W. Nelson, Jane P. Nelson 1980-7-6 6037 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  RSA122792  Carex douglasii G. A. Fischer, I. H. Johnson 1933-7-12 F- 234 Lassen Patterson Flat. 1738 Comment
  UC1736284  Carex douglasii Dean W. Taylor 1974-6-14 3716 Lassen Poison Lake, on Hwy 44 ca. 2 miles W from the junction with Pittville Road 1615 Comment
  JEPS94473  Carex filifolia var. erostrata Vernon H. Oswald and Lowell Ahart 1997-5-27 8510 Lassen 0.3 mi e of Highway 139 (n of Susanville on Forest Route 38N04 between Highway 139 near Willow Creek Guard Station and Coyote Flat, on creek paralleling road on the north); Forest Route 38N04 1560 Comment
  SEINET7558599 Image available Carex filifolia var. erostrata John Thomas Howell 1934-7-6 12451 Lassen Harvey Valley. Comment
  CAS-BOT-BC21303  Carex fracta John Thomas Howell; Gordon H. True 1973-7-31 50047 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  UC1609196  Carex heteroneura Vernon H. Oswald and Lowell Ahart 1993-8-3 5744 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  UC2031887  Carex heteroneura Nick Otting 2003-7-15 684 Lassen Sierra Nevada Mountains, Diamond Mountain, 1000 feet east of summit, 7.5 miles south-southwest of Susanville. Comment
  HSC48184  Carex hoodii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19242 Lassen 2 mi. N of Westwood Comment
  SEINET4292184 Image available Carex integra Unknown 2003-1 7916 Lassen High Cascade Range. Along Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.7(air) km west of Clover Valley. Swain Mountain 7.5' quad. Comment
  UC1594638  Carex lenticularis var. impressa Vernon H. Oswald and Lowell Ahart 1992-7-16 5115 Lassen swamp on creek w Cinder Pit (on logging road paralleling the e side of creek, 1.3 mi n of Hwy 44 and McCoy Flat Reservoir, between Old Station and Susanville); Bridge Creek 1719 Comment
  CHSC85008  Carex lenticularis var. lipocarpa L. P. Janeway; B. Castro 2003-10-5 8004 Lassen High Cascade Range. Western edge of Triangle Lake; Caribou Wilderness Area. 2153 Comment
  HSC103598  Carex leporinella Thomas W. Nelson, Jane Nelson 1985-8-10 8012 Lassen Along north side of Silver Lake campground 1829 Comment
  CAS-BOT-BC31947  Carex microptera John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50699 Lassen Steep rocky slope S and SE of Diamond Mt. 2286 Comment
  SEINET10850315  Carex multicaulis R. Ondricek 1978-6-27 Ondricek 78 Lassen On Coleman Lake Rd., .7 mi ne of Lassen Co. Rd. Al. T32N, R11E, nw quarter of Sec. 34, Fredonyer Peak Quadrangle, 15' in the 1977 Burn. 1951 Comment
  JEPS120112  Carex nebrascensis Lowell Ahart, John Dittes 2012-7-9 18298 Lassen About 150 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UC1100497  Carex nebrascensis Verne Grant and Herbert L. Mason 1947-7-9 13301 Lassen 5 mi e Bieber Comment
  UC1536798  Carex nebrascensis Gordon H. True Jr. 1939-6-15 995 Lassen near Grasshopper Valley; Bullard Lake Comment
  HSC103652  Carex nebrascensis Thomas W. Nelson, Jane Nelson 1985-8-10 8016 Lassen Along north side of Silver Lake 1829 Comment
  CHSC75552  Carex pellita Vernon H. Oswald; Lowell Ahart 1999-6-9 9738 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.3 mi west of Hwy. 395. 1353 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
  JEPS107838  Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11877 Lassen about 3/4 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction Comment
  CDA33131  Carex praegracilis T. C. Fuller 1980-8-6 20319 Lassen North of Smoke Creek Ranch Road, 2 km west of the state line, 28.75 km (18.5 miles) northeast of Highway 395, northeast of Ravendale. 0 Comment
  CAS-BOT-BC118740  Carex preslii John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49455 Lassen Elysian Valley, west of Janesville 1325 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
  CHSC66414  Carex simulata Vernon H. Oswald; Lowell Ahart 1996-6-17 7815 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau. Margin of a marshy pool at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  CHSC114421  Carex simulata Allison Sanger 2012-7-31 Lassen Cooper Swamp, east of Silver Lake across Road 32N10, approximately 36 air miles west-northwest of Susanville. 1956 Comment
  UCD140896  Carex straminiformis Jack Major 1966-6-24 s.n. Lassen above Blue Lake, Warner Mountains, northeastern Lassen County (ca. 18 miles airline southeast of Likely.) 1905 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
  UC1108036  Carex subfusca E. B. Copeland 1952-8-13 Lassen at road crossing King's Creek Meadow; Mount Lassen 2225 Comment
  CAS-BOT-BC116611  Carex subfusca Hans Leschke 1954-7-5 s.n. Lassen Hat Lake 1965 Comment
  CAS-BOT-BC115284  Carex utriculata George Wilson Gillett 1957-7-22 885 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. Comment
  JEPS28336  Carex utriculata George W. Gillett 1957-7-22 885 Lassen near campsite at s end of lake; Lassen Volcanic National Park, Snag Lake 1850 Comment
  SEINET7579515 Image available Carex utriculata George W. Gillett 1957-7-22 885 Lassen Lassen Volcanic National Park, Snag Lake, near campsite at south end of lake. 1850 Comment
  UC585182  Castilleja angustifolia E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1741 Lassen above Red Rock 1432 Comment
  CAS-BOT-BC249341  Castilleja applegatei Gary Schoolcraft 1983-6-29 1044 Lassen Ash Valley 1554 Comment
  CHSC91291  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
  JEPS81611  Castilleja applegatei subsp. pinetorum M. S. Taylor and B. Hammond 1982-8-27 5052 Lassen ca 6 air mi sw Doyle; Constantia Quad., Diamond Mts., Crystal Peak Area 2377 Comment
  JEPS81866  Castilleja applegatei subsp. pinetorum L. R. Heckard with J. C. Hickman, J. Bartel and A. Q. Howard 1982-4-26 5842 Lassen About 2.5 miles west of Paynes Creek, along highway 36 to Mt. Lassen (6.5 miles northeast of Dales) Comment
  UC1542945  Castilleja applegatei subsp. pinetorum G. Schoolcraft 1987-5-6 1699 Lassen n end Eagle Lake (near Stone Ranch) 1554 Comment
  UC444860  Castilleja applegatei subsp. pinetorum Franklin P. Nutting Lassen s of Eagle Lake (mountains) Comment
  UC773848  Castilleja applegatei subsp. pinetorum L. R. Short and J. Warren 1936-6-5 S- 378 Lassen Burgess Spring Experiment Range; Lassen Forest 1792 Comment
  UC1609116  Castilleja arachnoidea Vernon Oswald and Lowell Ahart 1993-6-14 5525 Lassen 2.0 mi ene Spaulding Tract Rd. (Rd. 518,33N89) (Eagle Lake Rd (Lassen A1), at Sandy Beach, on the w shore of Eagle Lake, on the upper beach between the road and the lake); Eagle Lake 1566 Comment
  UC725999  Castilleja campestris subsp. campestris A. A. Heller 1938-6-23 15218 Lassen between Termo and Madeline (along U.S. Hwy 395) 1615 Comment
  JEPS74939  Castilleja campestris subsp. campestris T. I. and F. M. Chuang 1975-7-23 7552 Lassen 3.2 mi s Madeline (along Hwy 395) Comment
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Jun 3 2009
  UCD55272  Castilleja chromosa Ellen Dean 2006-5-15 3082 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. Northern part of Johnston property near sandy wash. 1249 Comment
  UCR244105  Castilleja chromosa Jim Andre, G. L. Clifton 1993-6-9 19696 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
  JEPS126527  Castilleja lacera Lowell Ahart, John Dittes 2016-6-7 21021 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  JEPS76163  Castilleja linariifolia T. I. Chuang with Fei-Mei Chuang 1977-7-25 7660 Lassen 10 mi w Madeline Comment
  UC26450  Castilleja linariifolia Milo S. Baker 1894-7-25 Lassen Eagle Lake 1524 Comment
  HSC69066  Castilleja linariifolia Gary Schoolcraft 1979-7-5 124 Lassen Near top of Observation Peak 2134 Comment
  CAS-BOT-BC244885  Castilleja miniata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49417 Lassen Elysian Valley, west of Janesville. Plants of the Sierra Nevada 1325 Comment
  CAS-BOT-BC244893  Castilleja miniata John Thomas Howell 1934-6-10 11871 Lassen Janesville Comment
  CAS-BOT-BC244889  Castilleja miniata Alice Eastwood 1912-8-22 1893 Lassen Battle Creek meadows. Lassen Butte Region. Comment
  CAS-BOT-BC240998  Castilleja pilosa Francis W. Pennell 1940-6-9 25761 Lassen Route 395, 5 miles south of Ravendale 1645 Comment
  RSA637591  Castilleja pilosa Michael A. Vincent 1999-6-9 8584 Lassen Along US Rt. 395, south of Ravendale Fire Station, 1.8 miles north of rest area, and 24.8 miles north of Litchfield. 1524 Comment
  JEPS114750  Castilleja tenuis Lowell Ahart, John Dittes 2008-6-22 15027 Lassen Along a small natural drainage, about 20 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber 1262 Comment
  UC27205  Castilleja tenuis J. Burtt Davy Jun 17 1897-Jun 24 1897 3359 Lassen Adobe meadows; Honey Lake Valley Comment
  SJSU11528  Castilleja tenuis J. W. Tilden 1960-6-27 1514 Lassen by Moonlight Rd, 5 mi E of Westwood 1524 Comment
  CAS-BOT-BC48706  Ceanothus cordulatus John Thomas Howell 1974-7-9 50480 Lassen Coniferous forest between Susanville and SW end of Eagle lake 1828 Comment
  CAS-BOT-BC52047  Ceanothus prostratus A. M. Vollmer; L. Beane 1953-7-1 88 Lassen Along Halls Flat Road, beinning 6 miles West of Susanville to McArthur 1554 Comment
  CAS-BOT-BC52050  Ceanothus prostratus L. B. Barlow 1967-7-4 92 Lassen 5 mi. South of Eagle Lake Biological Station on Gallatin Beach Road 1737 Comment
  CAS-BOT-BC52051  Ceanothus prostratus S. Saufferer 1973-5-6 124 Lassen About 4 1/2 mis. West of Bieber along Highway #299 Comment
  CHSC30565  Ceanothus prostratus Sori H. Shad 1970-7-9 22 Lassen Found in Pine area 6 mile east of E.L.B.S. 1524 Comment
  JEPS103176  Ceanothus prostratus G. Schoolcraft 2000-4-25 2890 Lassen 3.5 mi N of Susanville along Hwy 139 1402 Comment
  JEPS118451  Ceanothus prostratus Lowell Ahart, John Dittes 2011-6-20 17496 Lassen Forest floor, about 40 yards west of the stream, about 300 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  UC1071528  Ceanothus prostratus Robert W. Gardner 1937-6-14 G- 2 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UCD130023  Centaurea diffusa W. A. Harvey 1964-6-23 s.n. Lassen J. E. Albaugh ranch, ca. 4 miles southwest of Adin. Comment
  CHSC114170  Centaurea solstitialis R. E. Brainerd; N. Otting 2004-8-26 538 Lassen Highway 395 ca 30 miles northeast of Susanville. 1371 Comment
  CAS-BOT-BC281208  Centaurea stoebe subsp. micranthos Lee E. Wheeler 1962-8-15 s.n. Lassen Doyle area Comment
  CAS-BOT-BC106028  Centaurea virgata subsp. squarrosa Loring White 1950-8-9 12 Lassen Roadside and fields Cramer Ranch, Big Valley Comment
  JEPS30734  Centaurea virgata subsp. squarrosa E. E. Fix 1960-9-21 Lassen Bieber, vic. of Comment
  JEPS78140  Centaurea virgata subsp. squarrosa Sally Levingson 1972-7-19 99 Lassen 2 mi east of Beiber on Highway A2 beside the road. 975 Comment
  SEINET13331057 Image available Centaurea virgata subsp. squarrosa T. C. Fuller unknown s.n. Lassen Big Valley Comment
  SEINET13331058 Image available Centaurea virgata subsp. squarrosa T. C. Fuller 1960-7-26 4873 Lassen 4 mi. N. of Bieber, Big Valley Comment
  UCD130125  Centaurea virgata subsp. squarrosa W. T. Parsons; T. C. Fuller 1960-7-26 4873 Lassen 4 miles north of Nubieber, Big Valley. Comment
  CAS-BOT-BC279593  Centromadia pungens subsp. pungens Gordon H. True 1973-8-22 7656 Lassen North shore of Honey Lake, ca. 5 miles east of Janesville and just west of Hartson Reservoir Comment
  CHSC99981  Centromadia pungens subsp. pungens L. P. Janeway 2008-8-2 9523 Lassen Modoc Plateau. Honey Lake Valley, 4.9 air km southeast of Standish, along Mapes Road 0.3 km east of Lambert Lane. 1222 Comment
  CAS-BOT-BC136988  Cercocarpus betuloides var. betuloides Alice Eastwood; John Thomas Howell 1940-6-11 7965 Lassen Eastern Fall River Valley Comment
  HSC26513  Cercocarpus ledifolius J. P. Smith, J. O. Sawyer 1972-5-6 5241 Lassen Lassen National Forest, Boundary Campground on Hwy. 89 S of Burney 1067 Comment
Read comments
Apr 29 2013
  CDA19743  Chaenactis douglasii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Between Ravendale and Secret Valley. 0 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
  CHSC105256  Chaenactis douglasii var. douglasii Lowell Ahart; John Dittes 2010-7-31 16984 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
  CHSC66372  Chaenactis douglasii var. douglasii Vernon H. Oswald; Lowell Ahart 1996-6-17 7775 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Along trail, and on slopes at the bridge spanning the Susan River on the N side of Hwy. 36. 1432 Comment
  JEPS117489  Chaenactis douglasii var. douglasii Lowell Ahart, John Dittes 2010-7-31 16984 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
  UC1136776  Chaenactis douglasii var. douglasii L. R. Short and Wm. Gansberg 1946-7-9 S- 480 Lassen Burgess Spring Experimental Range Lassen Forest, Burgess Spring Experimental Range 1804 Comment
  CAS-BOT-BC276610  Chaenactis douglasii var. douglasii David D. Keck; J. Clausen 1935-6-24 3737 Lassen 2 miles S of Ravendale 1464 Comment
  RSA30268  Chaenactis xantiana Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CHSC4857  Chamaebatiaria millefolium R. Carter 1967-7-13 588 Lassen On the rd to Eagle Lake, Biology Station and Willow Creek. 1584 Comment
  SEINET10937236  Chamaebatiaria millefolium Mary Susan Taylor 1974-5-4 Taylor 220 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
  HSC63927  Chamaesaracha nana Teresa Prendusi 1980-5-30 1109 Lassen Mapes Spring, 11 mi. W of 395 and 19 mi. S Ravendale, near spring outflow 1585 Comment
  UC1130434  Chamaesyce serpyllifolia A. Simontacchi 1940-7-7 943 Lassen Halls Flat Ranger Station 1706 Comment
  UC17811  Chamaesyce serpyllifolia M. S. Baker and Frank Nutting 1894-7-24 Lassen Willow Creek 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
  JEPS39306  Chamerion angustifolium subsp. circumvagum Brown and Wieslander 1922-7-23 37 Lassen Martin Sprs. Eagle Lake Comment
  CAS-BOT-BC69434  Cheilanthes feei B. C. Cain 1923-8-24 90 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park. 1645 Comment
  UC62593  Cheilanthes intertexta Baker and Nutting 1894-7-3 Lassen Dixey Mts Comment
  CAS-BOT-BC426341  Chenopodium John Thomas Howell 1962-6-19 37889 Lassen Sierra Nevada: Sagebrush Flat, 3 mi. S of Hallelujah Junction 1524 Comment
  CHSC112973  Chenopodium album Lowell Ahart; John Dittes 2013-7-22 18859 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
  CHSC106830  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen Ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road; meadow at head of streamlet. 1524 Comment
  SD211585  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen Circa 3/4 mile East-Northeast of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  UC1191355  Chenopodium berlandieri Verne Grant and Irving Schneider 1947-8-1 8229 Lassen irrigation ditch running sw into State Fish and Game nesting area on west end of Section 19; Madeline Plain Comment
  CHSC66862  Chenopodium rubrum var. humile Vernon H. Oswald; Lowell Ahart 1996-9-10 8279 Lassen Mountain Meadows Reservoir SW of Westwood. On the embankment of the railroad at the northwest edge of the reservoir. 1539 Comment
  UC1483847  Chimaphila umbellata G. Schoolcraft 1980-7-29 343 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  CHSC64884  Chorizanthe watsonii Vernon H. Oswald; Lowell Ahart 1995-6-19 6891 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. In small openings between brush on a slope on the n side of the road. 1383 Comment
  CAS-BOT-BC36276  Chrysolepis sempervirens Cain C. Brighton 1925-8-24 95 Lassen Mt. Lassen Volcanic National Park, 1 mi below Drakesbad 1645 Comment
  CHSC5249  Chrysolepis sempervirens P. Balch 1955-6-12 Lassen Eagle Lake. Forest between Eagle and Pittville Rd. Comment
  CAS-BOT-BC140658  Chrysothamnus humilis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50663 Lassen Summit ridge of Diamond Mt. 2346 Comment
  CDA19740  Chrysothamnus viscidiflorus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Madeline. 0 Comment
  CHSC65295  Chrysothamnus viscidiflorus subsp. lanceolatus Vernon H. Oswald; Lowell Ahart 1995-8-14 7190 B Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville. Along this section of road. 1645 Comment
  CHSC66850  Chrysothamnus viscidiflorus subsp. lanceolatus Vernon H. Oswald 1996-9-21 8287 Lassen Modoc Plateau. Willow Creek Wildlife Area on Hwy. 139 ca. 10 mi (air) N of Susanville. Levee, along the S edge of Willow Creek ca. 1 mi E of the parking area on the highway. 1490 Comment
  JEPS97320  Chrysothamnus viscidiflorus subsp. lanceolatus Vernon H. Oswald and L. Ahart 1995-8-14 7190 B Lassen T33N R14E SW1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 1.8 mi W of Hwy. 395, N of Susanville 1645 Comment
  CHSC7637  Chrysothamnus viscidiflorus subsp. puberulus Beverley J. Wise 1969-9-29 15 Lassen 4.5 mi. north of Susanville on Hwy 139. Roadside. 1371 Comment
  CAS-BOT-BC105906  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 2386 Lassen Big Valley, 2 6/10 miles from Bieber on road to Alturas 1267 Comment
  UC761819  Chrysothamnus viscidiflorus subsp. viscidiflorus R. F. Hoover 1940-9-29 4644 Lassen pass betw. Shaffer Mt. and Warren Peak Comment
  UC1602277  Chylismia claviformis subsp. cruciformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3399 Lassen Amedee Honey Lake Valley Comment
  SEINET218720  Cirsium acaulescens J. M. Gillett, A. G. Moulds 1964-6-9 12640 Lassen Westwood. Meadow along stream. Comment
  CDA1129  Cirsium canescens T. C. Fuller 1966-7-22 14981 -B Lassen Madeline Plains 10 mi w. of Termo, 3 mi N of paved road. E of road at E base of Dry Valley Ridge, Madelaine Plains . Comment
  CAS-BOT-BC277934  Cirsium canovirens T. C. Fuller 1959-7-7 2739 Lassen Hwy. 395 6 miles/north/road to Karlo Comment
  CAS-BOT-BC278008  Cirsium cymosum Alice Eastwood; John Thomas Howell 1940-6-15 8307 Lassen Willow Creek near Hayden Hill Comment
  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
  CHSC75452  Cirsium cymosum Vernon H. Oswald 1999-6-9 9740 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.4 mi west of Hwy. 395. Along the road. 1356 Comment
  UC1776701  Cirsium cymosum var. cymosum G. Schoolcraft 1998-6-23 2738 Lassen Along Ramhorn Road 1.5 miles N of campground 1676 Comment
  UCD21445  Cirsium douglasii Don Lancaster 2002-9-1 s.n. Lassen Blue Lake. Comment
  JEPS30609  Cirsium douglasii var. breweri Peter H. Raven and Otto T. Solbrig 1958-6-17 13280 Lassen 13.1 mi s Ravendale (along U.S. Highway 395) Comment
  JEPS59279  Cirsium occidentale var. californicum W. L. Jepson 1918-8-4 7807 Lassen Horse Lake 1554 Comment
  JEPS59280  Cirsium occidentale var. candidissimum W. L. Jepson 1918-8-2 7796 Lassen Honey Lake Valley 1219 Comment
  SEINET10725916  Cirsium occidentale var. candidissimum Karen M. Meyer, Andrew Townesmith 2007-7-21 Meyer 143 Lassen Lassen National Forest. 1.3 mi. on rd. 110, off Hwy. A21. 1821 Comment
  UC91792  Cirsium occidentale var. candidissimum T. S. Brandegee 1892-6-26 Lassen Milford 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-BC280421  Cirsium ochrocentrum T. C. Fuller 1980-8-5 20311 Lassen East shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  CDA1524  Cirsium ochrocentrum var. ochrocentrum D. Chambers, M. Carstens 1979-8-14 s.n. Lassen Modoc National Forest Upper Windmill Flat and Packwood Reservoir; 12 mi. S of Adin. 0 Comment
  CAS-BOT-BC286310  Cirsium scariosum James Jokerst 1983-7-25 1894 Lassen Near Madeline Plains 1614 Comment
  CAS-BOT-BC286515  Cirsium undulatum T. C. Fuller 1965-10-13 14201 Lassen E. of rd. at the e. base of Dry Valley Ridge, Madelaine Plains, 3 mi. n. of paved road, 10 mi. w. of Termo Comment
  CHSC7631  Cirsium vulgare Beverley J. Wise 1968-8-23 16 Lassen 10 mi. N.W. of Susanville on the Las. Co. Rd. 201. 1798 Comment
  CAS-BOT-BC169804  Cistanthe rosea H. D. Ripley; R. C. Barneby 1943-6-18 5464 Lassen Smoke Creek, NE of Viewland 1402 Comment
  CHSC99129  Clarkia gracilis subsp. gracilis Lowell Ahart; John Dittes 2008-6-19 14887 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  HSC81478  Clarkia lassenensis Thomas W. Nelson, Jane P. Nelson 1980-7-6 6020 Lassen Along Adin-Madeline Rd. 0.5 mi. W of Moll Reservoir. 1585 Comment
  RSA715985  Clarkia lassenensis L. Ahart, John Dittes 2005-6-2 11951 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4.75 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction 1513 Comment
  RSA0080500  Claytonia lanceolata M. S. Baker 1952-5-23 12429 Lassen Hwy. 36; 0.5 mi. West of Predonyer Pass. 1753 Comment
  CHSC63414  Claytonia rubra subsp. depressa Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6311 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  CHSC71096  Claytonia rubra subsp. depressa Vernon H. Oswald; Lowell Ahart 1998-5-22 9124 Lassen Road to summit of Fort Sage Mtns. 2.7 mi east of Fort Sage Rd., ca. 5 mi NE of Doyle. Locally abundant in moist soil along a drying streamlet in a shallow ravine eroded in granitic boulders. 1463 Comment
  CHSC91185  Claytonia rubra subsp. depressa Lowell Ahart; John Dittes 2005-6-1 11882 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
  CHSC7734  Claytonia rubra subsp. rubra Beverly J. Wise 1969-4-29 81 Lassen 3.4 mi. north of Susanville on Hwy 139 at the junction with Round Valley Road. 1341 Comment
  JEPS118455  Claytonia rubra subsp. rubra Lowell Ahart, John Dittes 2011-6-20 17486 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
  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
  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
  NY242361  Cleomella plocasperma G. Schoolcraft 1986-6-11 1620 Lassen About 1 mile west of CA-NV stateline along Smoke Creek Road. 1341.1 Comment
  RSA294659  Cleomella plocasperma A. Tiehm 1980-5-29 5746 Lassen North end of Honey Lake Valley, just N of Hot Springs 1.1 air mile NNW of Wendel. 1232 Comment
  CAS-BOT-BC423222  Cleomella plocasperma Luella Bass 1980-6-16 s.n. Lassen Wendel 1221 Comment
  CHSC116917  Collinsia parviflora J. P. Bergmann 2011-4-30 Lassen Fort Sage OHV Recreation Area. 1450 Comment
  CHSC23569  Collinsia parviflora W. O. Baum 1971-7-6 38 Lassen E slope of Gallatin Peak. 1950 Comment
  CHSC80278  Collinsia parviflora Jeanne Boze 1981-6-13 112 Lassen Northeast base of Gallatin Peak. 1950 Comment
  JEPS114656  Collinsia parviflora Lowell Ahart, John Dittes 2008-6-20 14916 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CDA34520  Collinsia parviflora B. Villegas 2011-5-26 s.n. Lassen Susanville, 2.3 miles southwest from junction of Hwy 36 & Hwy 139. 0 Comment
  HSC68935  Collinsia parviflora Gary Schoolcraft 1979-5-1 15 Lassen Along road between Big Springs and Shearing Corrals 1677 Comment
  SEINET3159383  Collinsia parviflora E. K. Balls 1950-5-9 4250 Lassen 6 mi S of Milford, Hwy 395 1295 Comment
  HSC75886  Collinsia torreyi D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19258 Lassen Harvey Valley near Cone Springs Comment
  UC1187149  Collinsia torreyi var. wrightii Jean Langenheim 1957-6-26 4379 Lassen Northwest Said Valley, northeastern part of Lassen County Northwest Said Valley Comment
  CHSC106085  Collomia grandiflora Lowell Ahart; John Dittes 2010-7-31 17002 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
  OBI77560  Collomia grandiflora Anthony Baniaga 2011-7-5 419 Lassen Lassen Natl Forest. E of Willard Ck. Fredonyer Pass quad T29N R10e sec 25 NE of NW Comment
  UC1137779  Collomia grandiflora August L. Hormay 1934-6-30 Lassen Harvey Mtn. Lassen National Forest/Forest and Range Exp't Station 2133 Comment
  SEINET12319536  Collomia grandiflora N. E. Heiken 1978-1 87 Lassen Lower Dry Lakes, E of Eagle L 1573 Comment
  SEINET12326975  Collomia grandiflora Unknown 1978-1 57 Lassen Lower Dry Lakes, E of Eagle L 1646 Comment
  CHSC92721  Collomia tinctoria L. P. Janeway 2005-7-3 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. 1536 Comment
  UC1137780  Collomia tinctoria August L. Hormay 1934-6-30 Lassen Harvey Mtn. Lassen Forest and Range Experiment Station/National Forest 2133 Comment
  UC23854  Collomia tinctoria M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC179604  Comandra umbellata subsp. pallida G. Schoolcraft 1989-6-7 1908 Lassen NW slope of Shaffer Mtn. near top 2011 Comment
  NY1000771  Comandra umbellata var. pallida G. Schoolcraft 1982-7-20 805 Lassen Wagner Canyon east of McKesick Peak 1524 Comment
  HSC95148  Comarum palustre Gordon Leppig 1998-7-12 934 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CDA3699  Conringia orientalis E. E. Fix 1961-6-1 Lassen E. Williams ranch, Termo. 0 Comment
  CHSC6282  Convolvulus arvensis D. L. Stites 1967-7-1 141 Lassen 10 mi se of Eagle Lake Biology Station on Lower Murrer's Meadow. 1371 Comment
  POM33281  Conyza canadensis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  POM107535  Corallorhiza striata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  CHSC77234  Cordylanthus ramosus G. Schoolcraft 1999-8-10 2873 Lassen S. of Doyle Grade about 2.5 mi. w. of Doyle, CA. 1584 Comment
  JEPS11645  Cordylanthus ramosus R. F. Hoover 1940-10-1 4655 Lassen Jonesville Comment
  CHSC68861  Cornus sericea subsp. sericea Vernon Oswald; Lowell Ahart 1997-6-24 8611 Lassen South of Susanville on the north of Diamond Mtn. at a springy slope with streamlets along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. 1889 Comment
  CHSC77215  Corydalis caseana subsp. caseana G. Schoolcraft 1997-8-6 2657 Lassen Along w. fork of Gold Run Creek about 8 miles sw of Susanville. 1859 Comment
  POM17703  Crepis acuminata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UCR18726  Crepis acuminata Frank C. Vasek 1975-7-11 750711- 12 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CAS-BOT-BC290391  Crepis acuminata G. L. Stebbins, Jr.; E. B. Babcock 1936-6-7 1763 Lassen Near summit east of Red Rock 1818 Comment
  CAS-BOT-BC376483  Crepis bakeri subsp. cusickii G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-14 2331 Lassen Along road half way between Bogard Ranger Station and Harney Valley 1630 Comment
  JEPS87521  Crepis modocensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5614 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  UC1609226  Crepis modocensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5614 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  CAS-BOT-BC291572  Crepis modocensis subsp. modocensis G. L. Stebbins; J. A. Jenkins 1937-7-10 2277 Lassen Diamond Mt. 2286 Comment
  UC581270  Crepis modocensis subsp. subacaulis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2276 Lassen Diamond Mt.; summit and e slope Comment
  CAS-BOT-BC376532  Crepis monticola G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-6 2193 Lassen Susanville, just west of the town, on Inspiration Point Comment
  SEINET10443269 Image available Crepis occidentalis M. Church 2016-5-5 7 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1443 Comment
  UC581290  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2302 Lassen w Milford (crest or range head of ridge); Stony Ridge 1930 Comment
  SEINET2144365 Image available Crepis occidentalis subsp. costata A. A. Heller 1938-6-23 s.n. Lassen Valley east of Fredonyer Pass, on state highway 36 Comment
  CAS-BOT-BC376546  Crepis occidentalis subsp. occidentalis G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-8 2217 Lassen Seven miles southwest of Ravendale 1660 Comment
  UC1136844  Crepis occidentalis subsp. pumila L. R. Short and Wm. Gansberg 1936-7-7 S- 476 Lassen Burgess Spring Experiment Station Lassen <National> Forest 1764 Comment
  CAS-BOT-BC290823  Crepis occidentalis subsp. pumila Elmer I. Applegate 1934-5-4 8915 Lassen South of Secret Valley Comment
  JEPS124754 Image available Croton setiger Laurie Hooker 1965-7-12 113 Lassen On highway 139, 13 miles East of Susanville. Comment
  CHSC76103  Crypsis schoenoides Lowell Ahart; Vernon H. Oswald 1999-9-13 8216 Lassen In a field, about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  UCD59985  Crypsis vaginiflora P. B. Kennedy 1915-9-1 s. n. Lassen Bieber. Comment
  CHSC23441  Cryptantha K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5840 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  CHSC68849  Cryptantha Vernon Oswald; Lowell Ahart 1997-6-24 8593 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). 1685 Comment
  CHSC23567  Cryptantha affinis W. O. Baum 1971-7-6 28 Lassen E slope of Gallatin Peak. 1950 Comment
  SBBG19764  Cryptantha affinis C. B. Hardham 1961-6-17 7505 Lassen Baxter Crk, S of Susanville Comment
  POM72292  Cryptantha circumscissa Marcus E. Jones 1897-6-18 7079 , 7076 Lassen Chat 1524 Comment
  UCD54568  Cryptantha circumscissa Ellen Dean; Dawn Cunningham 2005-10-25 2751 Lassen East of the town of Susanville. Property N of California Correctional Facility. 1248 Comment
  SDSU20526  Cryptantha echinella Nuri Benet-Pierce, John P. Pierce 2012-7-14 527 Lassen Diamond Mountain. 2023 Comment
  UC1924241  Cryptantha echinella Debra Valov 2004-6-8 2004243 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  SJSU11363  Cryptantha glomeriflora J. W. Tilden 1960-6-27 1494 Lassen Westwood 1524 Comment
  NY1110382  Cryptantha humilis B. J. Ertter 1987-6-16 7182 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  SJSU5810  Cryptantha intermedia J. W. Tilden 1958-6-27 1294 Lassen Madeline Comment
  UC78722  Cryptantha intermedia T. S. Brandegee 1892-6-26 Lassen Milford 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
  UC1562813  Cryptantha watsonii Barbara Ertter with Gary Schoolcraft 1987-6-16 7187 Lassen ne side Honey Lake (w of Hot Springs VABM); Skeedaddle Mountains 2133 Comment
  RSA262506  Cuscuta approximata Lee Smith 1975-9-4 s.n. Lassen A1 Blickenstaff Farm, near Honey Lake, 3 miles south of Janesville. Comment
  JEPS47106  Cuscuta californica Brown and Wieslander 1922-8-20 85 Lassen Martin Springs Eagle Lake Comment
  UC473500  Cycladenia humilis var. humilis A. N. Kramer 1930-1 15 Lassen Prospect Peak Lassen National Park Comment
  SBBG50491  Cynoglossum occidentale J. T. Howell 1974-7-9 50483 Lassen between Susanville and SW end of Eagle Lake 1828 Comment
  CAS-BOT-BC114167  Cyperus squarrosus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49512 Lassen Elysian Valley, W of Janesville. 1325 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
  SEINET6627868  Cystopteris fragilis M. J. Williams 1970-7-4 s.n. Lassen Ash Creek, SE of Adin 1280 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
  CAS-BOT-BC208395  Dalea ornata Gary Schoolcraft 1984-6-28 1280 Lassen NW of Shaffer Mtn., on the tablelands 1402 Comment
  SEINET230899 Image available Dalea ornata Arnold Tiehm, Raymond Evans: James Young 1984-6-7 8592 Lassen Flats on the Northwest side of Shaffer Mountain, 7.5 air miles North-northwest of Litchfield. 1372 Comment
  CAS-BOT-BC445519  Damasonium californicum C. L. Hitchcock 1940-5-26 6646 Lassen Overflow of Pitt River, 1 mile west of Bieber. Comment
  CDA35647  Damasonium californicum J. R. Keck Jr. 1985-7-18 PDR# 330136 Lassen Ballard Reservoir; Near Old Station. Lassen National Forest. 0 Comment
  SEINET6188248  Damasonium californicum R. F. Thorne, Larry E. De Buhr 1975-1 46995 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 iles south of Modoc county line. 1615 Comment
  UC1024914  Danthonia californica Leo Whitney 1935-6-25 3368 Lassen near Camp 10 <of?> Fruit Grower's Supply Company; Lassen National Forest Comment
  UC1609259  Danthonia californica Vernon H. Oswald and Lowell Ahart 1993-8-3 5755 Lassen e Silver Lake (just e of Caribou Wilderness, ca 13 air mi n of Lake Almanor); Cooper Swamp 1932 Comment
  JEPS88511  Danthonia californica var. americana Vernon H. Oswald and Lowell Ahart 1996-6-24 7839 Lassen Papoose Meadows located 2.5 mi s of Eagle Lake (and 0.5 mi e of Eagle Lake Road (A1),on w side of meadow just s of cabins, Modoc Plateau); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1136811  Danthonia californica var. americana George A. Fischer and Irwin H. Johnson 1933-7-12 F 236 Lassen Patterson Flat Lassen National Forest 1737 Comment
  CAS-BOT-BC192329  Danthonia unispicata Ralph K. Gierisch 1968-7-11 3353 Lassen Lassen National Forest. Harvey Valley - Dixie Spr. 1706 Comment
  JEPS88200  Danthonia unispicata Vernon H. Oswald and Lowell Ahart 1996-6-17 7803 Lassen n side of Bizz Johnson Trail between Devils Corral Trailhead and 6.0 milepost (trailhead located off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 Comment
  UCD61076  Danthonia unispicata L. Whitney 1935-6-24 Lassen Ashurst Mt., N of Harvey Valley, ca. 35 mi. NW of Susanville. Comment
  JEPS28461  Delphinium George W. Gillett 1957-7-21 864 Lassen Juniper Lake-Cameron Meadow trail 300 yd n trail summit; Lassen Volcanic National Park 2118 Comment
  CHSC106589  Delphinium andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC93658  Delphinium andersonii Lowell Ahart; John Dittes 2005-6-2 11995 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
  JEPS94118  Delphinium andersonii Vernon H. Oswald and Lowell Ahart 1998-5-22 9125 Lassen ca. 5 mi. n.e. Doyle (rd. to summit of Fort Sage Mts., 2.2 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1463 Comment
  UC1583981  Delphinium andersonii G. Schoolcraft 1990-6-12 2090 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC9127  Delphinium andersonii Mrs. C. C. Bruce June 1898 2238 Lassen Shumway Comment
  UCD55273  Delphinium andersonii Ellen Dean 2006-5-15 3083 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. Northern part of Johnston property near sandy wash. 1249 Comment
  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
  UC1143008  Delphinium nudicaule August L. Hormay 1934-5-11 Lassen 4 mi nw Hall's Flat; Lassen National Forest 1676 Comment
  UC477491  Delphinium nudicaule A. G. Brenneis 1928-5-28 1 Lassen 1/2 mi e Willow Springs; Lassen <National> Forest 1371 Comment
  CAS-BOT-BC9944  Delphinium nudicaule Mrs. H. C. Cantelow 1949-6-11 8 Lassen East slope of Fredonyer Pass Comment
  SEINET10675839 Image available Delphinium nudicaule A. Arthur Heller 1938-6-4 Heller 15149 Lassen More or less shaded gravelly slope in the yellow pine forest one mile east of Fredonyer Pass on Highway #36, Arid Transition Life Zone. 1707 Comment
  HSC27052  Delphinium nuttallianum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19165 Lassen 3 mi. N of Westwood Comment
  POM100692  Delphinium nuttallianum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA0011561  Deschampsia R. F. Thorne, Larry E. DeBuhr 1975-8-22 46991 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  OBI75897  Deschampsia cespitosa Anthony Baniaga 2011-8-17 508 Lassen Lassen Natl Forest. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E sec 31 SW of SW 1978 Comment
  RSA126933  Deschampsia cespitosa subsp. cespitosa G. A. Fischer, I. H. Johnson 1933-7-14 F- 244 Lassen Patterson Flat 1738 Comment
  CAS-BOT-BC192742  Deschampsia danthonioides Louella Bass 1973-5-29 EU 57 Lassen Elysian Valley 1325 Comment
  CHSC99495  Deschampsia danthonioides Lowell Ahart; John Dittes 2008-6-20 14926 Lassen 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
  UC1483828  Deschampsia danthonioides G. Schoolcraft 1980-7-28 331 Lassen meadow area e. of Tule Mt. 2042 Comment
  UCD61873  Deschampsia danthonioides A. A. Beetle 1941-6-28 2816 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  CAS-BOT-BC201814  Deschampsia elongata John Thomas Howell; Gordon H. True 1973-8-1 50181 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CAS-BOT-BC201808  Deschampsia elongata Malcom A. Nobs; S. Galen Smith 1949-7-21 1058 Lassen 4 miles north of Madeline Comment
  CDA42999  Descurainia nelsonii L. Ahart, John Dittes 2008-6-19 14891 Lassen West bank of Willow Creek, about 5 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. Comment
  UC1126907  Descurainia pinnata A. Simontacchi 1940-6-4 808 Lassen 14.8 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1783 Comment
  CAS-BOT-BC43165  Descurainia pinnata subsp. brachycarpa A. Simontacchi 1940-6-4 808 Lassen 14.8 miles west of Harvey Mountain Lookout. 1813 Comment
  RSA152597  Descurainia sophia I. L. Wiggins, Dorothy Wiggins 1961-6-11 16334 Lassen 13.5 miles E of Susanville. Comment
  JEPS25534  Dichelostemma multiflorum Rimo Bacigalupi with Lincoln Constance 1959-6-16 7148 Lassen 3.7 mi s Susanville to Adin road junction with road to Bieber (along county road from Susanville to Adin) 1615 Comment
  CAS-BOT-BC500986  Dichelostemma multiflorum H. D. Ripley; R. C. Barneby 1943-6-14 5750 Lassen West of Susanville 1310 Comment
  SEINET5709536 Image available Dieteria canescens var. canescens Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7711 Lassen Willow Creek. Collected along Forest Road 37N04, off of CA 139.; Willow Creek 1575 Comment
  UC1136761  Dieteria canescens var. shastensis Irwin H. Johnson 1933-7-14 F 268 Lassen Lassen Forest 1752 Comment
  CHSC4832  Diplacus jepsonii R. Carter 1967-7-14 602 Lassen Growing on n side of rd. ca. 3.5 mi e of Silver Lake between rd (31N07) and Susan River. 1828 Comment
  CHSC26186  Diplacus mephiticus J. P. Kroessig 1977-5-23 30 Lassen Large scattered population at Eagle Lake Biological Station, ca 37 km nnw of Susanville. 1570 Comment
  SEINET13704195  Diplacus mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  RSA0011496  Dipsacus fullonum R. F. Thorne, Larry E. DeBuhr 1975-8-22 46971 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 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
  CHSC115787  Distichlis spicata Lowell Ahart; John Dittes 2015-7-14 20333 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
  CHSC13507  Distichlis spicata J. Pitts 1972-6-22 251 Lassen 150 yds. n of Eagle Lake Biology Station. Comment
  RSA647537  Distichlis spicata Marion P. Harthill 1972-6-18 804 Lassen Litchfield. 1311 Comment
  UC60743  Distichlis spicata J. Burtt Davy June 17-24 1897 Lassen Amedee, Honey Lake Valley Comment
  CHSC4945  Dodecatheon alpinum R. Carter 1967-6-23 549 Lassen 25 yds w of dam in Murrer's Meadow. Along rd to Murrer's Meadow. 1584 Comment
  HSC95203  Dodecatheon alpinum Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-28 507 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC445031  Dodecatheon alpinum Milo S. Baker 1894-7-12 Lassen Pine Creek Comment
  POM76750  Dodecatheon alpinum subsp. majus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  NY677195  Dodecatheon conjugens G. Schoolcraft 1988-4-25 1783 Lassen Ash Valley RNA/ACEC 16 miles east of Adin 1554 Comment
  RSA772873  Downingia R. F. Thorne, Larry E. DeBuhr 1975-8-22 47207 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CHSC112464  Downingia bacigalupii Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18738 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
  CHSC79144  Downingia bacigalupii Beecher Crampton 1970-6-26 8637 a Lassen Ca. 5 miles west of Susanville. Comment
  CHSC95386  Downingia bacigalupii H. Chappel; J. Goldhammer, K. Moran, K. Strassman 2002-7-9 ALT- 018 Lassen Ecoregion 4. Muck Valley (at top of mountain pass). 1386 Comment
  UC2047850  Downingia bacigalupii Debra Valov 2016-6-21 1296 Lassen Bieber; off County Rd. A2 c. 8 km east of Hwy 299; 100 m up private driveway; in dry vernal pool/ditch. Comment
  CHSC27657  Downingia bicornuta N. E. Heiken 1978-7-27 92 Lassen N of Antelope Valley, w of Eagle Lake, pond in pasture. 1677 Comment
  RSA28137  Downingia bicornuta Elmer I. Applegate 1929-6-24 5883 Lassen Pond just north of Beiber, NW corner of county. Comment
  UCD149940  Downingia bicornuta William Anderson 1963-6-21 s.n. Lassen Honey Lake Valley. Comment
  JEPS14500  Downingia bicornuta var. bicornuta Joseph Grinnell 1928-6-26 Lassen Poison Lake 1737 Comment
  JEPS108488  Downingia bicornuta var. bicornuta Lisa Schultheis 1996-6-28 308 -96 Lassen Between Bieber and Adin. Corner of Finley Rd. and Rt. 299. Comment
  JEPS108508  Downingia bicornuta var. bicornuta Lisa Schultheis 1995-6-27 228 -95 Lassen W sie of Rt. 395, 3.5 mi S of Madeline. Comment
  SJSU3581  Downingia insignis P. L. Billings 1965-7-13 76 Lassen near Nubieber 1274 Comment
  CAS-BOT-BC266471  Downingia laeta Wm. Anderson 1960-6-16 s.n. Lassen Along county road 0.25 mile S of Mapes Ranch, Honey Lake Valley Comment
  JEPS114644  Downingia laeta Lowell Ahart, John Dittes 2008-6-20 14928 Lassen Bottom of vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  POM175682  Downingia laeta R. S. Williams 1887-7-30 s.n. Lassen Near Augusta (?) Comment
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Jul 9 2013
  POM68166  Downingia laeta Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  SEINET8039620  Downingia laeta G. Schoolcraft 1995-6-6 2493 Lassen Laver Spring. 1585 Comment
  CAS-BOT-BC41370  Draba verna M. S. Taylor 1982-5-7 4428 Lassen Reno Junction on Highway 70 just east of Beckwourth Pass. 1524 Comment
  CHSC99297  Draba verna var. verna Lowell Ahart; John Dittes 2008-6-20 14959 Lassen In meadow, about 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS97330  Drosera anglica Vernon H. Oswald 1995-8-21 7216 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Marsh in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  SEINET11910532  Drymocallis glandulosa Unknown 1978-1 11 Lassen E side of Mahogany L., S of Eagle L. 2060 Comment
  HSC4373  Dysphania ambrosioides M. T. Milligan 1964-8-6 204 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  CHSC116194  Elatine Lowell Ahart; John Dittes 2015-7-13 20294 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
  JEPS121273  Elatine Lowell Ahart, John Dittes 2013-7-23 18890 Lassen Man-made pond, about 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC112750  Elatine californica Lowell Ahart; John Dittes 2013-7-22 18882 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  CHSC112748  Elatine rubella Lowell Ahart; John Dittes 2013-7-22 18883 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS28330  Eleocharis acicularis George W. Gillett 1957-7-29 952 Lassen Snag Lake, shoreline near the E inlet Lassen Volcanic National Park 1850 Comment
  CHSC60449  Eleocharis acicularis var. acicularis Mary Ann Showers 1992-6-13 2548 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 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
  UC190417  Eleocharis macrostachya M. S. Baker and Frank Nutting 1894-7-6 Lassen Adobe Meadow, Dixey Valley Comment
  CAS-BOT-BC113202  Eleocharis parishii R. F. Thorne; C. W. Tilforth 1969-9-6 39258 Lassen Sandy flats along Long Valley Creek, ca. 14 mi SE of Milford. 1310 Comment
  UC1100132  Elodea nuttallii Herbert L. Mason and Verne Grant 1947-7-9 13292 Lassen 5 miles east of Bieber Comment
  SEINET10565243  Elymus Paul Gallian, David B. Dunn 1971-6-2 Gallian 512 Lassen 6 mi of Hallelujah Jct. on US hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  UCD62907  Elymus X saundersii Beecher Crampton 1954-7-5 2061 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  JEPS127354  Elymus caput-medusae Lowell Ahart, John Dittes 2016-7-13 21145 Lassen 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC60798  Elymus cinereus Vernon H. Oswald; Lowell Ahart 1993-6-14 5543 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). On the N side of the road. 1566 Comment
  JEPS121785  Elymus cinereus B. Castro and L. P. Janeway 2012-7-2 1937 Lassen Modoc Plateau. 32 air mi due E of Susanville, 12 mi E of Hwy 395 and 3 mi W of the NV border. East side of Skedaddle Mountains; corral at Skedaddle Ranch. Comment
  JEPS123868  Elymus cinereus Lowell Ahart, John Dittes 2015-7-14 20327 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  SEINET12737887  Elymus cinereus M. Church 2016-7-26 14 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1412 Comment
  SEINET10521741  Elymus cinereus Paul Gallian, David B. Dunn 1971-6-2 Gallian 490 Lassen 5 mi. S. of Milford near Honey Lake on U.S. Hwy 395; along roadside in grass - Artemesia tridentata assoc.; Quercus - Jeffrey Pine on mountain range to west at approximately the same altitude. 1250 Comment
  UCD64242  Elymus condensatus L. Whitney 1933-7-16 Lassen Harvey Mt., Lassen Forest. 1828 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
  CAS-BOT-BC227488  Elymus elymoides John Thomas Howell 1934-7-10 12533 Lassen Between Harvey Valley and Patterson Flats Comment
  JEPS128418  Elymus elymoides Jennifer Mueller 2017-7-18 CA 320 -193 Lassen Near Long Springs on Cold Springs Mountain. Comment
  SEINET8512804  Elymus elymoides A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-6-24 NV 030 -1085 Lassen Costantia Allotment, W of Peterson's. 1374 Comment
  UCD61417  Elymus elymoides Beecher Crampton 1954-7-5 2065 Lassen Along Hwy. 36, 5.5 miles west of Susanville. 1447 Comment
  UCD61524  Elymus elymoides L. D. Whitney 1935-6-24 Lassen Squaw Valley. Comment
  UCD61568  Elymus elymoides L. Whitney 1933-8-15 Lassen Halls Flat. Lassen Forest. 1737 Comment
  UC1024794  Elymus elymoides subsp. elymoides Leo Whitney 1933-7-15 2229 Lassen ca 25 mi w upper end of Eagle Lake; Lassen National Forest, Hall's Flat 1737 Comment
  UC1537224  Elymus elymoides subsp. elymoides Gordon H. True Jr. 1937-7-10 786 Lassen mesa n Skeedaddle Creek; Hot Spring Mountain 1524 Comment
  UC188795  Elymus elymoides subsp. elymoides Milo S. Baker Lassen Dixie Mt.; s side Comment
  HSC22391  Elymus elymoides var. californicus D. E. Anderson 1969-7-5 4996 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  JEPS126495  Elymus elymoides var. californicus Alia Johnson, Jocelyn Munoz, Jillian Sarazen 2016-6-28 CA 350 -72 Lassen Heading north on 395 turn right on to Smoke Creek Road and drive up the road towards the uphill to where the Rush fire burned. Comment
  CAS-BOT-BC206731  Elymus glaucus subsp. glaucus John Thomas Howell 1976-7-19 51976 Lassen Gold Run Creek southwest of Susanville - Sierra Nevada 1386 Comment
  CAS-BOT-BC234092  Elymus multisetus Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16343 Lassen Hillside 13.5 mi. E of Susanville Comment
  UCD62499  Elymus multisetus John Thomas Howell 1976-7-20 52001 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek. 1432 Comment
  UCR7791  Elymus salinus Marilyn Malin 1968-7-10 260 Lassen Great Basin, south side of Hwy 395 at the Hurlong turnoff 1235 Comment
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Mar 9 2010
  CHSC111248  Elymus spicatus B. Castro; L. P. Janeway 2012-7-3 1938 Lassen Modoc Plateau. 16 air mi ENE of Susanville, and 0.35 mi W of Hwy 395, along road up to Shaffer Mountain. 1417 Comment
  CHSC117482  Elymus spicatus L. P. Janeway; B. Castro 2015-6-5 11761 Lassen Great Basin, Modoc Plateau. Along the road from the south end of Surprise Valley to Tuledad Canyon, 7.4 road-km south of Surprise Valley Road; 1.4 air-km northwest of Mahogany Mtn. 1731 Comment
  CDA31738  Elymus trachycaulus T. C. Fuller 1963-7-15 10888 Lassen 2.9 miles southeast of Pittville, south of road to Little Valley 0 Comment
  JEPS68378  Elymus trachycaulus Brown and Wieslander 1922-7-23 74 Lassen Martin Springs Comment
  UC1024705  Elymus trachycaulus Leo Whitney 1933-6-9 2139 Lassen Black's Lake Lassen National Forest 1706 Comment
  UC1037145  Elymus trachycaulus Leo Whitney 1935-6-24 3306 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC1136823  Elymus trachycaulus George A. Fischer and Irwin H. Johnson 1933-7-12 F 233 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  JEPS114765  Elymus trachycaulus subsp. subsecundus Lowell Ahart, John Dittes 2008-6-20 14908 Lassen about 100 yds W of where the levee road crosses Bog Valley Canal, in Big Valley, about 4 mi (air) NE of the Headquarters at Ash Creek State Wildlife Area, about 7 mi (air) NE of Bieber 1263 Comment
  CHSC105211  Elymus trachycaulus subsp. trachycaulus Lowell Ahart; John Dittes 2010-7-19 17017 Lassen On the south side of the road, about 20 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
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Oct 5 2019
  CHSC115577  Elymus trachycaulus subsp. trachycaulus Lowell Ahart; John Dittes 2015-7-14 20332 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
  JEPS117564  Elymus trachycaulus subsp. trachycaulus Lowell Ahart, John Dittes 2010-7-19 17017 Lassen On the south side of the road, about 20 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
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Oct 5 2019
  CAS-BOT-BC81878  Ephedra viridis M. Bourell 1997-5-31 5882 Lassen Wendel Road 10.9 miles southeast of Highway 395 Comment
  CHSC32865  Ephedra viridis J. S. White 1980-4-14 124 Lassen 3 mi ne of Wendel. 1371 Comment
  CHSC60268  Ephedra viridis P. V. Caldwell 1972-6-30 299 Lassen 22 mi from Hwy 139, 7 mi w of Ravensdale (turnoff 15 mi from Susanville). Comment
  CHSC64747  Ephedra viridis Vernon H. Oswald 1995-6-7 6832 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) at milepost 9.5, 4.1 mi e of Wendel, ne of Susanville. 1231 Comment
  JEPS94703  Ephedra viridis Vernon H. Oswald and Lowell Ahart 1998-5-22 9103 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts., 0.5 mi. e. of Fort Sage Rd.); Fort Sage Mts. 1371 Comment
  NY70786  Ephedra viridis A. J. Cronquist 1959-6-17 8477 Lassen 6 miles northeast of Susanville 1828.8 Comment
  SEINET10532255  Ephedra viridis Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 893 Lassen Collected 3 mi N of Milford, Callif., on Hwy 395 at Honey Lake campgrounds. Comment
  RSA123007  Epilobium brachycarpum L. R. Short, J. Warren 1936-6-23 S- 454 Lassen Burgess Spring Exp. Range, Lassen forest 1744 Comment
  RSA252401  Epilobium brachycarpum Robert F. Thorne, C. W. Tilforth 1969-9-6 39263 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  JEPS121248  Epilobium campestre Lowell Ahart, John Dittes 2013-7-22 18850 Lassen About 30 yards S of the man-made pond, about 120 yards south of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles northeast of Bieber, Big Valley. Comment
  NY1001473  Epilobium ciliatum var. ciliatum V. E. Grant 1947-9-6 8388 Lassen Irrigation ditch west of Fleming Ranch headquarters, near Wendel Comment
  NY1000270  Epilobium densiflorum G. Schoolcraft 1982-8-18 893 Lassen West of Doyle 1585 Comment
  UC1924202  Epilobium densiflorum Debra Valov 2005-8-20 2005223 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  UC634689  Epilobium densiflorum Lloyd Swift 1928-8-15 Lassen Blue Lake Lassen National Forest Comment
  CHSC63405  Epilobium hallianum Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6317 Lassen Cold Springs near Clarks Valley Rd. (Lassen 510) ca. 11 mi E of Madeline. In a meadow. 1871 Comment
  JEPS39254  Epilobium hallianum Brown and Wieslander 1922-7-23 38 Lassen Martin Sprs. Eagle Lake Comment
  CHSC96725  Epilobium oregonense Gordon Leppig; T. LaBanca, L. Arguello 1997-6-29 527 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  UC1122349  Epilobium pallidum A. Simontacchi 1940-6-5 853 Lassen 7.0 mi wnw Cones Headquarters; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC332739  Epilobium pallidum R. F. Thorne; Larry E. DeBuhr 1975-8-22 46980 Lassen Along Hwy 395 ca 6 miles N of Medeline and 4.5 miles S of Modoc county line 1615 Comment
  CDA38101  Epilobium palustre Gordon Leppig 1998-8-17 1049 Lassen Northern California Peatlands; Modoc National Forest. Blue Lake Ranch. Comment
  JEPS127270  Epilobium torreyi Lowell Ahart, John Dittes 2016-7-13 21126 Lassen 60 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
  RSA508633  Epipactis gigantea Mrs. R. M. Austin 1880-8-3 s.n. Lassen Mount Dyer 1829 Comment
  JEPS77524  Equisetum hyemale subsp. affine L. R. Heckard with T. I. Chuang and R. C. Bacigalupi 1978-7-20 4894 Lassen junction of Blue Lake turn-off with Likely-Patterson Guard Station rd.; Warner Mts. 1889 Comment
  CAS-BOT-BC57305  Equisetum laevigatum Clare B. Hardham 1969-8-28 17458 Lassen west of Janesville Comment
  CHSC30622  Equisetum laevigatum John Steiner 1975-6-23 5 Lassen Upper Murrer's Meadow. 1536 Comment
  CAS-BOT-BC204432  Eragrostis cilianensis John Thomas Howell 1973-7-10 49793 Lassen Susanville 1295 Comment
  CHSC91598  Eragrostis cilianensis G. Douglas Barbe 1978-8-31 2425 Lassen Modoc National Forest. Roadside, Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). 1417 Comment
  CAS-BOT-BC213624  Eragrostis mexicana subsp. virescens John Thomas Howell 1976-7-19 51943 Lassen Susanville 1296 Comment
  CAS-BOT-BC174183  Eremogone congesta var. charlestonensis John Thomas Howell 1977-6-22 52401 Lassen North end of Eagle Lake 1584 Comment
  CAS-BOT-BC174199  Eremogone congesta var. congesta L. G. Bennett 1967-6-24 33 Lassen 0.5 miles from start of road 5.19 towards Murrers Meadow near Eagle Lake 1493 Comment
  CHSC89729  Eremogone congesta var. congesta L. P. Janeway 2004-6-26 8165 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  SEINET12875575 Image available Eremogone congesta var. subcongesta John Thomas Howell 1977-1 52401 Lassen North end of Eagle Lake 1585 Comment
  CAS-BOT-BC174308  Eremogone congesta var. suffrutescens George W. Gillett 1957-7-29 945 Lassen Along trail between Butte Lake and Snag Lake. Lassen Volcanic National Park 1859 Comment
  CAS-BOT-BC159995  Eremothera boothii subsp. alyssoides Mrs. C. C. Bruce 1898-6-1 2139 Lassen Shumway Comment
  CAS-BOT-BC159999  Eremothera boothii subsp. alyssoides Mrs. H. C. Cantelow 1941-5-22 s.n. Lassen 7 miles south of Secret Valley C.C.C. Camp Comment
  SEINET4132785  Eremothera boothii subsp. alyssoides A. Tiehm 1980-1 5754 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 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
  SEINET14592139  Eriastrum signatum R. R. Halse 2004-7-21 6669 Lassen At junction of US Hwy 395 and State Road A 26, ca 11 miles SE of Milford. 1274 Comment
  UC526132  Eriastrum signatum John Thomas Howell 1934-6-10 11840 Lassen near Plumas Junction Comment
  CAS-BOT-BC515174  Eriastrum signatum L. S. Smith 1937-7-1 2783 Lassen Plumas Forest, Honey Lake Valley N of highway near E end of the lake Comment
  RSA0125158  Eriastrum signatum Marcus E. Jones 1897-6-22 9972 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  UCD149881  Eriastrum wilcoxii William Anderson 1963-6-26 s.n. Lassen Honey Lake. Comment
  CAS-BOT-BC286603  Ericameria bloomeri R. K. Gierisch; D. H. Esplin 1969-8-27 3598 Lassen Lassen National Forest Comment
  UC1118663  Ericameria bloomeri H. P. Hagge 1929-9-11 15 Lassen Logan Mt. Eagle Lake Quad., Logan Mtn. 1828 Comment
  UC747139  Ericameria bloomeri G. Thomas Robbins 1945-10-7 2153 Lassen se slope of Harvey Mt. 2-3 mi ne Burgess Spring; Lassen National Forest, Harvey Valley 1828 Comment
  UCR57484  Ericameria bloomeri R. D. Goeden, Don W. Ricker 1989-8-24 32 Lassen Lassen National Forest, Black Gulch Road, c. 2 mi. west of Little Valley Road 1524 Comment
  CAS-BOT-BC298173  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile E of Termo 1645 Comment
  CAS-BOT-BC298181  Ericameria nauseosa var. oreophila Carl B. Wolf 1931-9-4 2397 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  JEPS21521  Ericameria nauseosa var. oreophila R. F. Hoover 1940-9-28 4638 Lassen Leavitt Comment
  UC761846  Ericameria nauseosa var. oreophila R. F. Hoover 1940-9-28 4638 Lassen Leavitt Comment
  UC761817  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass betw. Shaffer Mt. and Warren Peak Comment
  CAS-BOT-BC299485  Ericameria nauseosa var. washoensis Gary Schoolcraft 1979-8-23 181 Lassen Just off Post Camp Road along road to Big Spring 1676 Comment
  SEINET8198339 Image available Ericameria parryi var. parryi D. W. Taylor 2002-8-10 18310 Lassen Plumas National Forest Road 24N02X 1.2 air miles from Constantina Road, East slope Diamond Mountains (ca. 4 air miles South of Doyle) 1433 Comment
  CDA18267  Erigeron G. D. Barbe 1974-8-2 1931 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC25084  Erigeron K. R. Stern 1967-6-24 2408 Lassen Murrer Meadow, Ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  RSA700050  Erigeron bloomeri L. P. Janeway 2001-6-20 7198 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
  SEINET3132724  Erigeron bloomeri J. L. Strother 1970-5-23 952 Lassen ca. 6 mi. N of Honey Lk. 1280 Comment
  CAS-BOT-BC294488  Erigeron bloomeri var. bloomeri John Thomas Howell 1934-7-8 12513 Lassen Harvey Valley 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
  CHSC99139  Erigeron bloomeri var. bloomeri Lowell Ahart; John Dittes 2008-6-19 14894 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  GMDRC7734  Erigeron bloomeri var. bloomeri J. M. Andre, G. Clifton 1993-6-1 33411 Lassen Modoc Plateau: along US Hwy 395 at Viewland, approx 8 mi. ENE of Litchfield, 20 mi. NE of Susanville, east side of Shaffer Mtn 1399 Comment
  CAS-BOT-BC294484  Erigeron bloomeri var. bloomeri G. Schoolcraft 1998-6-30 2745 Lassen N. end of Ft. Sage Mtns. 1950 Comment
  CAS-BOT-BC297144  Erigeron concinnus var. concinnus Ella Dales Cantelow 1940-5-31 3086 Lassen e. of Bieber 1219 Comment
  CAS-BOT-BC296848  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-11 7979 Lassen Big Valley Mts. Comment
  CHSC75455  Erigeron divergens Vernon H. Oswald; Lowell Ahart 1999-6-9 9748 Lassen Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Below the dam of the reservoir. 1353 Comment
  JEPS97306  Erigeron divergens Vernon H. Oswald and L. Ahart 1995-8-14 7193 Lassen T33N R14E NE1/4 Sec. 10, 5500 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small intermittent stream, N of Susanville 1676 Comment
  UC1536893  Erigeron divergens G. H. True Jr. 1936-6-21 516 Lassen roadside se Litchfield; Honey Lake Valley 1219 Comment
  CAS-BOT-BC295977  Erigeron divergens Margaret J. Williams 1984-6-16 84- 31 -1 Lassen Doyle Grade, County Hwy 331 2.6 mi. W of Doyle Comment
  RSA78916  Erigeron divergens E. K. Balls, Percy C. Everett 1952-10-10 18144 Lassen 8 mi. SE of Ravendale, Hwy 395, between Susanville and Alturas. 1280 Comment
  SEINET8667206 Image available Erigeron divergens M. J. Williams 1984-6-16 84- 31 -1 Lassen Doyle grade, County Hwy 331, 2.6 mi W of Doyle Comment
  SBBG8127  Erigeron eatonii var. plantagineus H. and M. Dearing 1938-6-30 2233 Lassen N of Susanville [Hwy 44] 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
  POM32996  Erigeron filifolius Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  CAS-BOT-BC295182  Erigeron inornatus John Thomas Howell 1974-7-10 50561 Lassen Elysian Valley 1325 Comment
  SBBG8113  Erigeron inornatus H. and M. Dearing 1938-7-1 2236 Lassen Susanville Comment
  UC2027204  Erigeron inornatus var. calidipetris Anthony Baniaga 2011-8-3 485 Lassen Lassen National Forest. N of 30N61, W of A21. Swain Mountain quadrangle Comment
  POM41676  Erigeron inornatus var. inornatus Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC295472  Erigeron lassenianus var. lassenianus Parkison 1916-6-21 40 Lassen Lassen National Forest. Near Patterson Cabin 1706 Comment
  CAS-BOT-BC295507  Erigeron linearis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch 2225 Comment
  RSA0049610  Erigeron linearis Dean Wm. Taylor 2012-6-7 21231 Lassen Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139 1635 Comment
  HSC5530  Erigeron philadelphicus M. S. Baker 1893-1 Lassen Vicker's Ranch, Big Valley, collected in the summer Comment
  CDA19737  Erigeron pumilus D. Tillotson 1942-6-9 s.n. Lassen Modoc Plateau; Mud Flat. 0 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
  CAS-BOT-BC300122  Erigeron pumilus var. intermedius Alice Eastwood; John Thomas Howell 1940-6-15 8312 Lassen Upper Willow Creek east of Hayden Hill Comment
  UC468919  Erigeron pumilus var. intermedius Franklin P. Nutting Lassen Big Valley Northern California, Big Valley Comment
  UC584286  Erigeron tener G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2285 Lassen summit Thompson Peak (s of Janesville) 2346 Comment
  CAS-BOT-BC241565  Eriogonum baileyi var. baileyi R. F. Hoover 1940-10-5 4672 Lassen Between Shaffer Mt. and Warren Peak Comment
  SEINET530700  Eriogonum baileyi var. baileyi Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  CAS-BOT-BC241569  Eriogonum baileyi var. baileyi E. K. Balls; P. C. Everett 1952-10-10 18139 Lassen 5.5 mi. n.e. of Litchfield, Hwy 395, between Susanville and Alturas 1280 Comment
  CAS-BOT-BC241832  Eriogonum caespitosum B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6567 Lassen U.S. Hwy 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield 1330 Comment
  CHSC7738  Eriogonum caespitosum Beverley J. Wise 1969-5-3 78 Lassen 3.4 mi east of junction with Hwy 395 on Las. Co. Rd. 338 (Smoke Creek Road). 1584 Comment
  NY242927  Eriogonum caespitosum B. M. Bartholomew 1993-5-13 6567 Lassen U.S. Hwy 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield. 1330 Comment
  POM253244  Eriogonum caespitosum A. A. Heller 1938-6-23 15216 Lassen Grassy, gravelly slope between Secret Valley and Ravendale, on U.S. Highway 395 1524 Comment
  SEINET8513012  Eriogonum caespitosum A. Rosenblum, A. Ortega, O. Schilling, M. Gray 2015-6-24 s.n. Lassen Constantia Allotment, West of Peterson's 1490 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
  SD232774  Eriogonum cernuum Greg R. Ballmer 1993-7-31 Lassen Sandy flats along Fort Sage Road, NE of Doyle, SE of Honey Lake, ca. 2 0 5 mi. (airline) W. of Nevada border Comment
  JEPS19795  Eriogonum collinum Rimo Bacigalupi with S. Galen Smith 1957-6-28 6009 Lassen ne along US Highway 395 Karlo (near headwaters of Secret Creek, n of Secret Valley and w of Rye Patch Canyon); Secret Creek 1615 Comment
  RSA176183  Eriogonum collinum Noel Holmgren, James L. Reveal 1964-8-22 1723 Lassen 48 miles northeast of Susanville, 4 miles south of Ravendale Comment
  RSA236684  Eriogonum collinum A. J. Cronquist, A. H. Holmgren 1959-6-17 8478 Lassen 1 mile south of Ravendale, 40 miles NE of Susanville 1616 Comment
  SEINET5328978  Eriogonum collinum N. H. Holmgren, James Lauritz Reveal 1964-8-22 1723 Lassen 48 miles northeast of Susanville, 4 iles south of Ravendale, Comment
  UCD99875  Eriogonum douglasii John Thomas Howell; Gordon H. True, Wayne Dakan 1974-7-30 50662 Lassen summit ridge of Diamond Mt. 2286 Comment
  UC1553394  Eriogonum douglasii var. douglasii G. Schoolcraft 1988-6-7 1812 Lassen 14 air mi ne Ravendale 1737 Comment
  CHSC23494  Eriogonum douglasii var. meridionale K. R. Stern 1974-6-26 5866 Lassen E end of Champs Flat. Comment
  CAS-BOT-BC255743  Eriogonum elatum var. villosum Clare B. Hardham 1969-8-28 17459 Lassen West of Janesville, Sierra Nevada Comment
  CAS-BOT-BC263045  Eriogonum maculatum Noel H. Holmgren; James L. Reveal 1964-8-22 1724 Lassen 35 miles northeast of Susanville 18 miles south of Ravendale along U.S. 395 Comment
  UC85967  Eriogonum maculatum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  POM203841  Eriogonum marifolium J. T. Howell 1934-7-9 12521 Lassen Pine Creek Flat Comment
  CAS-BOT-BC267344  Eriogonum marifolium var. marifolium G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2289 Lassen East slope of Thompson Peak, south of Janesville 2346 Comment
  CDA22621  Eriogonum microthecum var. ambiguum L. Ahart 2003-8-17 10518 Lassen About 100 yards west of the cattle guard, on the southeast side of Smoke Creek Ranch Road, about 8 - 9 miles (air) northeast of Highway 395, about 30 miles (air) northeast of Susanville. Comment
  SD64343  Eriogonum microthecum var. laxiflorum D. F. Howe 1966-8-24 Lassen 39 miles northeast of Litchfield on hwy #395 1676 Comment
  CAS-BOT-BC268789  Eriogonum nidularium R. F. Hoover 1940-9-29 4643 Lassen Between Shaffer Mt. and Warren Peak Comment
  CHSC13456  Eriogonum nudum var. pubiflorum J. Pitts 1972-6-25 272 Lassen 30 yds. e of Papoose Creek on Road 4.25, on n side of road. S of Eagle Lake 1/4 mi. Comment
  JEPS126464  Eriogonum nudum var. pubiflorum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-27 CA 350 -070 Lassen North on Highway 139 to Antelope Grade. Comment
  UC1137674  Eriogonum nudum var. pubiflorum L. R. Short and Wm. Gansberg 1936-7-3 S- 474 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1798 Comment
  CAS-BOT-BC269925  Eriogonum nudum var. pubiflorum Barrett Anderson 1986-7-9 3129 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  SEINET530683  Eriogonum nummulare Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  SEINET530684  Eriogonum nummulare Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  UCD100769  Eriogonum ovalifolium Beecher Crampton 1964-6-26 7087 Lassen 35 miles NW of Susanville, State Hwy. 44, Gray's Valley, 3 miles north Bogard Ranger Station. Comment
  CHSC114416  Eriogonum ovalifolium var. depressum Don Lepley 2012-7-26 Lassen Windy Hollow, west of Highway 44 about three miles southeast of Bogard Rest Area. (plants also in Section 14 and probably Sec. 15 of T31N R08E) 1722 Comment
  UC54767  Eriogonum ovalifolium var. ovalifolium J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amadee Honey Lake Valley, Amadee Comment
  SBBG65540  Eriogonum sphaerocephalum S. W. Hutchinson -Jun-1925 858 Lassen near Susanville 1219 Comment
  CAS-BOT-BC271960  Eriogonum sphaerocephalum var. halimioides B. J. Hammerly 1941-6-21 46 Lassen 8 mi. SE. of Likely on Blue Lake Road Comment
  CHSC68755  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald; Lowell Ahart 1997-5-27 8491 Lassen East side of Hwy. 139 at a small farm pond 38.2 mi north of Susanville, 7.4 mi north of Eagle Lake Rd. 1627 Comment
  UC1032330  Eriogonum sphaerocephalum var. halimioides A. Simontacchi 1940-7-8 923 Lassen 5.1 mi s Jelly Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET11261382  Eriogonum sphaerocephalum var. sphaerocephalum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3921 Lassen 1.9 rd miles west of jct with Hwy 395 on Dawn Dr on E side of Shaffer Mountain. Ca 18 air mi ene of downtown Susanville.; 0 1545 Comment
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  CAS-BOT-BC262742  Eriogonum strictum var. anserinum H. D. Ripley; R. C. Barneby 1944-5-30 5965 Lassen Secret Valley 1554 Comment
  JEPS117571  Eriogonum strictum var. anserinum Lowell Ahart, John Dittes 2010-7-31 16989 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1510 Comment
  CAS-BOT-BC267896  Eriogonum umbellatum Alice Eastwood; John Thomas Howell 1940-6-11 7981 Lassen Big Valley Mts. Comment
  RSA782634  Eriogonum umbellatum Elizabeth A. Kempton, Tim Tibault 2006-7-29 418 Lassen Town of Chester. Vacant lot at intersection of Willow Way and Main Street 1388 Comment
  CHSC12489  Eriogonum umbellatum var. modocense Carol Weld 1969-7-16 62 Lassen 1 and 1/2 miles S. E. of Eagle Lake Field Station toward Hwy. 139. 1554 Comment
  CHSC13632  Eriogonum umbellatum var. modocense M. S. Taylor 1974-7-13 306 Lassen Ca. 150 ft w of Mahogany Lake, ca. 5 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC66395  Eriogonum umbellatum var. modocense Vernon H. Oswald; Lowell Ahart 1996-6-17 7799 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the S side of the trail just E of Devils Corral Trailhead. 1420 Comment
  GMDRC6954  Eriogonum umbellatum var. modocense J. M. Andre, T. La Doux, Senna & Elias Andre 2013-7-12 31429 Lassen along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1733 Comment
  UC161881  Eriogonum umbellatum var. modocense T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  UC412898  Eriogonum umbellatum var. modocense W. E. Bryant Aug. 1888 Lassen Eagle Lake Comment
  JEPS88218  Eriogonum umbellatum var. modocense Vernon H. Oswald and Lowell Ahart 1996-6-17 7799 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville 1420 Comment
  CAS-BOT-BC265091  Eriogonum umbellatum var. nevadense John Thomas Howell 1976-7-19 51951 Lassen Southwest of Susanville on Gold Run Road, Sierra Nevada 1341 Comment
  CHSC93680  Eriogonum umbellatum var. nevadense Lowell Ahart; John Dittes 2005-6-2 11980 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
  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
  UC1032336  Eriogonum umbellatum var. nevadense A. Simontacchi 1940-6-15 877 Lassen 1.6 mi ssw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC584410  Eriogonum umbellatum var. nevadense G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2310 Lassen w Milford (crest of range head of Stony Ridge); Stony Ridge 1930 Comment
  UC585250  Eriogonum umbellatum var. nevadense E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1756 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  CHSC117539  Eriogonum vimineum Lowell Ahart; John Dittes 2016-7-13 21132 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS117563  Eriogonum vimineum Lowell Ahart, John Dittes 2010-7-31 17018 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  JEPS19807  Eriogonum vimineum Rimo Bacigalupi with S. Galen Smith 1957-6-28 6011 Lassen ne, along U.S. Hghway 395 Karlo (near headwaters of Secret Creek, n of Secret Valley and w of Rye Patch Canyon); Secret Creek 1615 Comment
  JEPS56156  Eriogonum vimineum W. L. Jepson 1918-8-5 7816 Lassen Madelin Plains 1615 Comment
  RSA165633  Eriogonum vimineum Clare B. Hardham 1961-6-16 7490 Lassen Open woods. Gold Run Creek. South of Susanville. Comment
  UC1258486  Eriogonum vimineum G. Schoolcraft 1979-6-19 78 B Lassen Painter's Flat 1719 Comment
  UCR245457  Eriogonum vimineum Elizabeth A. Kempton 2007-8-15 511 Lassen Janesville, intersection of Hwy 395 and Sunnyside Road 973 Comment
  CAS-BOT-BC262357  Eriogonum vimineum Mrs. H. C. Cantelow 1940-10-5 4177 Lassen N. W. of Johnsville Comment
  CHSC96443  Eriophorum gracile Gordon Leppig; T. LaBanca, L. Arguello 1997-6-28 508 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC300341  Eriophyllum Ella Dales Cantelow 1941-5-22 s.n. Lassen N. of Litchfield. U.S. Hy 395. Lava Country Comment
  CHSC23514  Eriophyllum lanatum Wayne O. Baum 1971-7-6 71 -48 Lassen E. slope of Gallatin Peak. 1950 Comment
  HSC28818  Eriophyllum lanatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19256 Lassen Harvey Valley near Cone Springs Comment
  SEINET10919981  Eriophyllum lanatum David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17793 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-BC308137  Eriophyllum lanatum var. achilleoides John Thomas Howell 1934-7-8 12481 Lassen Spalding's, Eagle Lake Comment
  OBI75879  Eriophyllum lanatum var. croceum Anthony Baniaga 2011-6-29 402 Lassen Lassen Natl Forest. Willard Ck., Fredonyer Pass. Fredonyer Pass quad T29N r10E sec 14 NE of SW 1500 Comment
  CHSC106076  Eriophyllum lanatum var. grandiflorum Lowell Ahart; John Dittes 2010-7-31 17024 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-BC301529  Eriophyllum lanatum var. integrifolium H. D. Ripley; R. C. Barneby 1943-6-13 5717 Lassen South of Johnstonville 1325 Comment
  CHSC59683  Eriophyllum lanatum var. integrifolium Mary Meyer 1980-5-7 Lassen Mesa between Pete's Creek. 1447 Comment
  POM66743  Eriophyllum lanatum var. integrifolium Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  JEPS107866  Erodium cicutarium Lowell Ahart, John Dittes 2005-6-2 11923 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  JEPS124541 Image available Erodium cicutarium J. Yamanaka 1965-7-12 121 Lassen Highway 395, 15 miles N. of junction of Calif. 704 and US 395 Comment
  UC1487305  Eryngium alismifolium Yusuf Sheikh and Lincoln Constance 1973-6-27 549 Lassen 4.3 mi S of Ravendale (on State Highway 395) Comment
  UC1508837  Eryngium alismifolium Gary Schoolcraft 1981-8-11 558 Lassen Silva Flat Reservoir 1706 Comment
  JEPS66448  Eryngium alismifolium L. R. Heckard and P. Rubtzoff 1971-8-4 2709 Lassen ca. 10 mi. n. Terms (along U.S. Hwy. 395) Comment
  UC21010  Eryngium articulatum J. Burtt Davy Jun 17 1897-Jun 24 1897 3374 Lassen Honey Lake Valley Comment
  CAS-BOT-BC55195  Erysimum repandum Louella Bass 1982-5-30 s.n. Lassen Near Karls RR Station on Karls Road northeast of Susanville. Comment
  CAS-BOT-BC150214  Erythranthe Clare B. Hardham 1969-8-28 17453 G Lassen West of Janesville Comment
  CHSC71395  Erythranthe inflatula Vernon H. Oswald; Beth Corbin, Gary Schoolcraft 1998-7-13 9263 Lassen Pittville Rd. (Lassen 111, FS 36N01) on the southeast edge of Poison Lake 1.9 mi N of Hwy. 44. On the bank of a pond on the east side of the railroad, which parallels the lake shore at this point. 1709 Comment
  CAS-BOT-BC151473  Erythranthe latidens James Jokerst 1983-7-23 1872 Lassen Grasshopper Valley Quad., near Madeline Plains 1614 Comment
  CHSC68876  Erythranthe lewisii Vernon Oswald; Lowell Ahart 1997-6-24 8616 Lassen South of Susanville on the north side of Diamond Mtn. at a springy slope with streamlets along Forest Rd. 29N42, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. 1889 Comment
  CHSC4974  Erythranthe primuloides D. L. Stites 1967-7-14 168 Lassen 3 mi e of turnoff to Silver Lake on highway 44. 1524 Comment
  POM260456  Erythranthe pulsiferae C. L. Hitchcock 1940-5-26 6611 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CHSC60778  Erythranthe suksdorfii Vernon H. Oswald; Lowell Ahart 1993-6-14 5522 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  UC1561401  Eschscholzia californica Barbara Ertter 1987-7-24 7297 Lassen ca 3/4 mi ene Beckwourth Pass (at end of old crumbling paved road) 1524 Comment
  JEPS117958  Eucephalus breweri Zoya Akulova-Barlow Sep 2006 Lassen Sierra Nevada, Dyer Mountain Comment
  CDA3709  Euclidium syriacum Lee Wheeler 1955-6-24 Lassen Bieber area. 0 Comment
  SFV1478  Euclidium syriacum B. J. McCaskill 1966-6-5 712 Lassen Frosty Acres Ranch, at end of Albaugh Road, 0.6 miles west of its junction with Bassett Road (about 2 miles south of U. S. Highway 299 and 4 miles southwest of Adin). 1280 Comment
  RSA0086578  Euphorbia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  UCSC000449  Euphorbia dictyosperma M. S. Baker 02 Julyunknown year s.n. Lassen South side of Dixey Mts. Lassen Mts. Comment
  CAS-BOT-BC278432  Festuca idahoensis Clarence R. Quick 1961-6-21 61 -28 Lassen Adjacent to Road 21, Blacks Mountain Experimental Forest northeast of Lassen Peak 1798 Comment
  RSA585079  Festuca idahoensis J. T. Howell 1934-7-7 12471 Lassen Pine Creek Flat. Comment
  UC1609257  Festuca idahoensis Vernon H. Oswald and Lowell Ahart 1993-6-28 5585 Lassen 1.2 mi n Hwy. 44 (e side of Grays Valley, e of Poison Lake); Grays Valley 1731 Comment
  UCD65975  Festuca idahoensis L. Whitney 1933-8-3 Lassen Halls Flat. Comment
  CHSC112779  Festuca myuros Lowell Ahart; John Dittes, Todd Sloat 2013-6-9 18784 Lassen Along a fence on the west side of McArthur Diversion Canal, 2.1 air-miles south of Rat Farm Boat Launch, 1.2 air-miles north of McArthur, Fall River Valley, McArthur Swamp. 1007 Comment
  CAS-BOT-BC278937  Festuca rubra George W. Gillett 1957-7-28 923 Lassen Lassen Volcanic National Park. Trail to Widow Lake above junction with Snag Lake trail at upper end of Butte Lake 1859 Comment
  JEPS28300  Festuca rubra George W. Gillett 1957-7-28 923 Lassen upper end Butte Lake (trail to Widow Lake above junction w/ Snag Lake trail, dry wash 100 yds. above trail junction); Lassen Volcanic Nat'l Park, Butte Lake 1859 Comment
  UC1024686  Festuca rubra Leo Whitney 1933-8-3 2159 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CAS-BOT-BC282537  Festuca viridula Parkison 1916-6-16 27231 Lassen North slope Crater Mountain, Lassen forest 1767 Comment
  JEPS95090  Floerkea proserpinacoides Vernon Oswald and Lowell Ahart 1997-6-24 8650 Lassen s of Susanville just s of small ond on crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout Red Rock Lookout; crest of Diamond Mountain 2249 Comment
  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
  CHSC4503  Fremontodendron californicum subsp. californicum C. Glascock 1965-5-15 419 Lassen 12.4 mi. w of Mineral R. S. on Hwy. 36 at n roadside. Comment
  CAS-BOT-BC504437  Fritillaria atropurpurea John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49174 Lassen Elysian Valley northwest of Janesville, Sierra Nevada 1325 Comment
  RSA59815  Fritillaria atropurpurea E. K. Balls 1950-5-19 14769 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
  RSA121073  Galium bifolium L. R. Short, W. Gansberg 1936-6-2 S- 368 Lassen Lassen forest. MDM. 1851 Comment
  POM203777  Galium bolanderi J. T. Howell 1934-7-3 12381 Lassen Near Dry Lake. Mtns. SE of Bieber. Comment
  POM68457  Galium mexicanum subsp. asperulum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC1523797  Galium multiflorum Gary Schoolcraft 1982-6-22 747 B Lassen Ft. Sage Mtns. 1767 Comment
  UC1561784  Galium multiflorum Barbara Ertter with Gary Schoolcraft 1987-6-16 7175 Lassen ne side Honey Lake (e of road over saddle on w side of range); Skeedaddle Mountains 1645 Comment
  CDA42206  Galium trifidum Gordon Leppig and T. LaBanca 1997-6-29 540 Lassen Blue Lake Ranch; Modoc National Forest. Comment
  HSC95224  Galium trifidum Gordon Leppig, Juli Neander, Kai Neander 1997-7-26 696 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC105244  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
  CHSC37686  Gayophytum diffusum subsp. parviflorum M. S. Taylor 1982-8-19 5023 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. 1493 Comment
  POM38697  Gayophytum diffusum subsp. parviflorum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  CHSC27713  Gayophytum heterozygum Robert A. Schlising 1978-7-21 3318 Lassen E side of Eagle L., near Eagle Lake Field Station. 1578 Comment
  UC303066  Gayophytum heterozygum Pearl Safford Lassen Susanville [uncertain locality] Comment
  HSC63969  Gayophytum humile Teresa Prendusi 1980-7-1 1121 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 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
  UC107796  Gayophytum racemosum T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  CHSC6191  Gayophytum ramosissimum R. Gein 1946-6-12 Lassen Webb's Camp, Eagle Lake. 1554 Comment
  NY999656  Gayophytum ramosissimum J. T. Howell 1974-7-8 50463 Lassen Susanville 1295 Comment
  RSA0004472  Gayophytum ramosissimum var. obtusum W. L. Jepson 1918-8-2 7755 Lassen Beckwith Pass 1463 Comment
  HSC8435  Gentiana newberryi Fred J. Kindel 1955-8-1 Lassen Mt. Meadows Reservoir Comment
  UC725738  Gentianopsis simplex A. A. Heller 1942-9-7 16536 Lassen shore of Summit Lake, Lassen Volcanic Nat'l Park Lassen Volcanic Nat'l Park, Summit Lake Comment
  RSA122288  Geum canescens L. R. Short, J. Warren 1936-6-23 s.n. Lassen Burgess Spring Exp Range. 1765 Comment
  CAS-BOT-BC459363  Geum macrophyllum John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49425 Lassen Elysian Valley, west of Janesville, Sierra Nevada 1325 Comment
  SJSU10496  Geum macrophyllum H. L. Buckalew 1961-7-8 Lassen Blue L, Warner Mts 1828 Comment
  CHSC99305  Geum triflorum Lowell Ahart; John Dittes 2008-6-19 14872 Lassen Along a small wash, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS47198  Geum triflorum Frances D. Payne 1929-7-12 87 Lassen on ridge above Lost Lake (Upper Silver Creek, northwestern Lassen County); Warner Mountains, Upper Silver Creek 2286 Comment
  JEPS94554  Geum triflorum Vernon Oswald and Lowell Ahart 1997-6-24 8649 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
  UC1584002  Gilia lottiae G. Schoolcraft 1990-6-12 2085 Lassen about 17 mi e Ravendale (in Pine Dunes RNA); e of Ravendale in Pine Dunes RNA 1706 Comment
  RSA104236  Gilia malior Verne Grant, Alva Grant 1956-5-17 21753 Lassen Just south of Secret Valley, north of Litchfield, along Hwy. 395. 1311 Comment
  CHSC11771  Gilia modocensis Wayne O. Baum 1971-6-28 71 -4 Lassen S. slope of Gallatin Peak. 2042 Comment
  CHSC48652  Gilia modocensis Vernon Oswald 1986-5-28 2078 Lassen Rd. 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  CAS-BOT-BC523868  Gilia modocensis Alice Eastwood; John Thomas Howell 1940-6-16 8355 Lassen Constantia Comment
  CHSC93697  Gilia ochroleuca Lowell Ahart; John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  SD135571  Gilia sinuata John Thomas Howell, Gordon H. True, Margaret Williams 1973-5-12 49156 Lassen Janesville, in cemetary. 1295 Comment
  JEPS123845  Glyceria borealis Lowell Ahart, John Dittes 2015-7-14 20326 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CAS-BOT-BC302593  Gnaphalium palustre John Thomas Howell 1973-6-28 s.n. Lassen Elysian Valley 1325 Comment
  CHSC93664  Gnaphalium palustre Lowell Ahart; John Dittes 2005-6-2 11968 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
  POM38258  Gnaphalium palustre Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  CHSC60854  Gratiola ebracteata Vernon H. Oswald; Lowell Ahart 1993-6-28 5625 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
  JEPS4213  Gratiola neglecta Milo S. Baker 1899-8-24 Lassen Big Valley; Carmichael's Mill Comment
  UC444903  Gratiola neglecta Milo S. Baker 1899-8-24 Lassen Carmichael's Mill Big Valley (Big Valley) Comment
  CHSC5232  Grayia spinosa J. E. Wolf 1946-6-28 Lassen Eagle Lake. Horse Lake. 1554 Comment
  UC1136436  Grayia spinosa E. Sawyer 1935-6-27 226 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UC7402  Grayia spinosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3273 Lassen Honey Lake Valley Comment
  CDA6056  Grindelia nana D. Sheehy 1990-8-17 Lassen Highway 395, south of Doyle, ca. 5 miles north of Hallelujah Junction. 0 Comment
  SJSU3576  Grindelia nana C. L. Kline 1965-7-13 195 Lassen State Rte 299, 1 mi NE of Nubieber 1274 Comment
  CHSC60757  Gymnosteris parvula Vernon H. Oswald; Lowell Ahart 1993-6-3 5485 Lassen Champs Flat Rd. (Lassen 105, Forest 32N28Y), 2.8 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, on the W edge of Pine Creek Valley, between Poison Lake and Susanville. In a meadow. 1731 Comment
  RSA719893  Gypsophila paniculata Michael A. Vincent, K. Levings 2006-7-29 112911 Lassen Along Rt. 395, ca. 6 miles SE of Johnstonville. Comment
  SEINET10837176  Hackelia bella Katherine L. Morris 1973-5-25 Morris 245 Lassen Collected 13.7 mi NW of the junction of Hwy 36 & 44 on Hwy 44, in an area of yellow pine, fir and Ribes. Comment
  HSC69598  Hackelia californica Gary Schoolcraft 1980-7-15 310 Lassen W of Biebes 1799 Comment
  UC1137694  Hackelia californica L. R. Short, J. Warren 1936-6-26 S 458 Lassen Burgess Spring Experiment Range; Lassen National Forest 1853 Comment
  CAS-BOT-BC231156  Hackelia cusickii Mrs. A S. Baldwin 1928-5-1 s.n. Lassen Coyote Flat, over ridge from Dixie Village Comment
  UC1483791  Hackelia cusickii Teresa Prendusi 1980-7-9 Lassen 36 m n of Susanville (on Hwy 139 and 4 m w); Grasshopper Ridge 1737 Comment
  CHSC25102  Halogeton glomeratus Paul Lyman 1970-5-12 19 Lassen Skeedaddle Mountain, Smoke Creek Desert, Litchfield. Found 200 yards east of Skedaddle Ranch house along Smoke Creek Spring. This area is high desert grassland and about 1/2 mi. west of Nevada Line. Comment
  NY537530  Halogeton glomeratus T. H. Kearney 1951-8-20 28229 Lassen Honey Lake Valley near Herlong 1280.2 Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  UCD98884  Halogeton glomeratus Les Berry; J. L. Myler 1954-8-17 s.n. Lassen Karlo. Comment
  UC1553381  Helianthella californica subsp. nevadensis G. Schoolcraft 1988-7-11 1822 Lassen about 1 mi s Hwy. 44 (on road to Goumaz) 1645 Comment
  CAS-BOT-BC305410  Helianthus annuus Verne Grant; Irving Schneider 1947-7-31 8215 Lassen Northeast quarter of George Williams section 19, Madeline Plain Comment
  CDA18385  Helianthus bolanderi G. D. Barbe 1978-8-31 2424 Lassen Modoc National Forest; Hwy 139, NW of Willow Creek Guard Station, Modoc National Forest, 3.6 mi SE of Co Rd A2 to Bieber, 6 mi S of Adin (Modoc Co.). Comment
  JEPS94088  Helianthus bolanderi Vernon H. Oswald and Lowell Ahart 1998-9-8 9572 Lassen Hwy. 299 at R.R. overpass on e. side of Nubieber 1255 Comment
  JEPS34877  Helianthus cusickii Joseph Grinnell 1929-6-8 Lassen s side Pete's Valley ((Valley which extends from Horse Lake to plains w of Shaffer Mt.)) Comment
  UC32309  Helianthus cusickii M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  CHSC13635  Heliotropium curassavicum M. S. Taylor 1974-6-25 269 Lassen On w shore of Pelican Pt, on e shore of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  SEINET11197274 Image available Hemizonella minima G. Schoolcraft 1997-6-26 2601 Lassen W of Hwy 395 between Janesville and Milford 1676 Comment
  SJSU8133  Hemizonella minima J. W. Tilden 1960-6-27 1500 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  UC174811  Hemizonella minima T. S. Brandegee 1892-6-26 Lassen Milford Comment
  UC1776663  Heracleum lanatum G. Schoolcraft 1994-8-2 2404 Lassen About 1 mile W of Boot Lake 2133 Comment
  CHSC7686  Hesperochiron californicus Beverley J. Wise 1969-4-20 45 Lassen 14.6 mi. north of Susanville on Hwy 139 (Willow Creek Valley). 1463 Comment
  SEINET5499704  Hesperochiron californicus N. H. Holmgren, P. K. Holmgren 1978-6-11 8910 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  RSA0128926  Hesperochiron californicus Christopher Davidson 1975-6-6 2719 Lassen 2.8 miles W of Bogard Work Center and roadside rest on Hwy 44. 1684 Comment
  UC73707  Hesperochiron californicus Milo S. Baker 1896-5-12 Lassen near Palmer's Comment
  CHSC61155  Hesperochiron pumilus Vernon H. Oswald; Lowell Ahart 1993-5-12 5382 Lassen Forest Rd. 32N08 to Crater Lake, 0.5 mi NE of Hwy. 44, between A21 ( to Westwood) and Poison Lake, on the edge of a large meadowy opening covered with sagebrush scrub along Pine Creek. 1737 Comment
  CAS-BOT-BC180030  Hesperochiron pumilus E. K. Balls 1950-5-19 14770 Lassen Ash Creek Public Camp, off rd. from Adin to Madeline. Comment
  CHSC117516  Hesperolinon micranthum Lowell Ahart; John Dittes 2016-7-13 21123 Lassen 20 yards south of the overflow, about 30 yards north of the dam, 180 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC23743  Hesperolinon micranthum M. S. Taylor 1974-7-10 272 Lassen Scattered on e side of Gallatin Beach Rd, ca. 3 mi s of Gallatin Beach on Eagle Lake, ca. 12 mi nw of Susanville. 1524 Comment
  NY1002357  Hesperolinon micranthum G. Schoolcraft 1984-7-30 1324 Lassen About 1 mile east of Post Camp 1707 Comment
  RSA795326  Hesperolinon micranthum L. Ahart, John Dittes 2010-7-31 16975 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1521 Comment
  UC1601275  Hesperolinon micranthum Leo Whitney 1934-7-8 1793 Lassen open flat near Harvey Valley Spring (ca 14 mi w of Eagle Lake); Lassen National Forest Comment
  UC1924195  Hesperolinon micranthum Debra Valov 2005-8-20 2005235 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CAS-BOT-BC280680  Hesperostipa comata John Thomas Howell 1934-6-10 11841 Lassen Near Plumas Junction Comment
  UCD85305  Hesperostipa comata P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia, California. Comment
  CHSC23522  Hesperostipa comata subsp. intermedia Wayne O. Baum 1971-7-12 71 -67 Lassen E. slope of Gallatin Peak. 1950 Comment
  UC1949318  Heterotheca villosa var. minor Barbara Ertter 1987-7-24 7302 Lassen ca 3/4 mi ENE of Bechwourth Pass at end of old crumbling paved road Comment
  NY783480  Heuchera rubescens G. Schoolcraft 1984-6-5 1197 Lassen In Wendel Canyon 1554.5 Comment
  CAS-BOT-BC312311  Hieracium Marcus E. Jones 1897-6-25 s.n. Lassen Susanville 1341 Comment
  UC1136852  Hieracium albiflorum George A. Fischer and Irwin H. Johnson 1933-7-14 F 269 Lassen Lassen <National> Forest 1737 Comment
  OBI77185  Hieracium greenei Anthony Baniaga 2011-7-18 454 Lassen Lassen NF.2-1/4 mi ESE of Signal Butte. Swains Hole quad. T32N R6E sec 9 NE of SW 1700 Comment
  CAS-BOT-BC318711  Hieracium horridum Lemmon 1874-9-1 s.n. Lassen Shasta Comment
  CHSC7206  Hippuris vulgaris Bruce K. Briggs 1969-9-10 232 Lassen Pond at Deans Meadow on N. end of meadow. Comment
  CHSC75503  Hippuris vulgaris Vernon H. Oswald; Lowell Ahart 1999-6-9 9737 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.3 mi west of Hwy. 395, springy marsh surrounded by sagebrush scrub. 1353 Comment
  CAS-BOT-BC280698  Holcus lanatus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49501 Lassen Elysian Valley, west of Janesville 1325 Comment
  RSA747548  Holodiscus microphyllus var. glabrescens K. M. Meyer, A. Townesmith 2007-7-23 150 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
  CHSC80544  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald 2001-5-4 9997 Lassen Ash Creek Wildlife Area, Wayman Barn at the west end of Hunt Rd. 1267 Comment
  JEPS87501  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald and Lowell Ahart 1993-5-12 5390 Lassen Butte Lake Rd. 1.4 mi s Hwy 44 (between Old Station and Poison Lake); Butte Lake Rd., between Old Station and Poison Lake 1652 Comment
  CHSC75571  Hordeum brachyantherum subsp. brachyantherum Vernon H. Oswald; Lowell Ahart 1999-6-9 9751 Lassen Northeast of Susanville on County Rd. 216 at Biscar Wildlife Management Area. Along a drainage below the dam of the reservoir. 1353 Comment
  JEPS28320  Hordeum brachyantherum subsp. brachyantherum George W. Gillett 1957-7-29 951 Lassen trail between Butte Lake and Snag Lake; Lassen Volcanic National Park, Butte Lake, Snag Lake 1859 Comment
  UC570171  Hordeum jubatum H. S. Yates 1936-8-11 6075 Lassen Baxter Creek Susanville Quad., Baxter Creek 1280 Comment
  UC1924232  Hordeum murinum subsp. leporinum Debra Valov 2004-6-9 2004262 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  JEPS44570  Horkelia fusca subsp. tenella Brown & Wieslander 1922-7-23 30 Lassen Martin Sprs., Eagle Lake Comment
  UC1609471  Horkelia fusca subsp. tenella Vernon H. Oswald and Lowell Ahart 1993-6-28 5577 Lassen 0.2 mi n Hwy 44 (Harvey Valley Rd (33N02), e side of Grays Valley, e of Poison Lake); e of Poison Lake, e side of Grays Valley 1749 Comment
  CHSC71324  Horkelia tridentata subsp. tridentata Vernon H. Oswald 1998-6-22 9229 Lassen Champs Flat Rd. (A-21) 1.6 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1764 Comment
  UC1037233  Horkelia tridentata subsp. tridentata Leo Whitney 1933-8-20 3036 Lassen ca 25 mi w upper end of Eagle Lake (Hall's Flat); Lassen National Forest Comment
  CAS-BOT-BC537967  Horkelia tridentata var. flavescens C. L. Hitchcock 1940-5-26 6597 Lassen Ca. 12 miles north of Fall River Mills. (Shasta Co.) on Fall River 1371 Comment
  SEINET5342520  Hornungia procumbens A. Tiehm 1980-1 5749 Lassen North end of Honey Lake Valley, just north of Hot Springs, 1.1 air miles NNW of Wendel. 1231 Comment
  JEPS1628  Hydrophyllum capitatum var. alpinum Leland S. Smith Jun 1925 Lassen near Hayden Hill; Modoc National Forest 1219 Comment
  CAS-BOT-BC312843  Hymenoxys lemmonii J. E. Stuart 1930-6-1 s.n. Lassen Eight miles south of Constantia on the Reno Road Comment
  UC124657  Hypericum anagalloides T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  SD130459  Hypericum formosum var. scouleri John Thomas Howell, Gordon H. True and Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CAS-BOT-BC401310  Hypericum scouleri B. C. Cain 1925-8-24 87 Lassen 1 mile below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  NY52523  Iliamna bakeri G. Schoolcraft 1983-8-3 1129 Lassen 5 miles w of Madeline 1767.8 Comment
  NY716915  Iliamna bakeri R. R. Halse 2004-7-8 6615 Lassen Along State Highway 139, ca. 6 miles north of Eagle Lake 1710 Comment
  SEINET8887136  Iliamna bakeri R. R. Halse 2004-1 6615 Lassen Along State Hwy 139, ca 6 miles N of Eagle Lake 1710 Comment
  JEPS808  Ipomopsis aggregata Brown and Wieslander 1922-6-19 1 Lassen Martin Springs Eagle Lake Comment
  UC1037223  Ipomopsis aggregata Leo Whitney 1934-7-6 1591 Lassen ca 14 mi w Eagle Lake (near Harvey Valley Spring); Lassen National Forest, Harvey Valley Comment
  HSC69077  Ipomopsis aggregata Gary Schoolcraft 1979-7-12 145 Lassen NW side of Shinu Peaks 2134 Comment
  CHSC23502  Ipomopsis aggregata subsp. formosissima Wayne O. Baum 1970-6-30 70 -1 Lassen E. slope of Gallatin Peak. 1981 Comment
  UC23470  Ipomopsis congesta M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC72317  Ipomopsis congesta subsp. palmifrons L. P. Janeway; Glenn Clifton 1998-7-9 5728 Lassen Ridgetop saddle 1.0 mi east of Diamond Mtn. 2215 Comment
  JEPS118488  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
  CHSC36493  Iris missouriensis Theresa Costa 1982-6-4 33 Lassen Ca. 3/4mi n Murrer's Upper Meadow. Comment
  JEPS17345  Iris missouriensis W. L. Jepson 1918-8-4 7811 Lassen Horse Lake 1554 Comment
  POM312929  Iris missouriensis H. L. Mason 1949-5-30 s.n. Lassen Northeast of Burney Falls 1524 Comment
  CHSC117178  Isoetes orcuttii Lowell Ahart; John Dittes 2016-6-7 21016 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UC1537066  Iva axillaris subsp. robustior Gordon H. True Jr. 1936-6-21 517 Lassen se of Litchfield; Honey Lake Valley 1219 Comment
  CAS-BOT-BC148542  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 miles west of Madeline. Comment
  CHSC64852  Ivesia paniculata Vernon H. Oswald 1995-6-26 6947 Lassen Modoc Plateau. Coyote Flat on Hunzinger Flat Rd. (FS 38N04) 5.6 mi s of its junction with Ash Valley Rd. (Lassen 527). 1783 Comment
  RSA59709  Ivesia paniculata E. K. Balls 1950-5-19 14783 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
  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
  SEINET10891010 Image available Ivesia paniculata Thomas W. Nelson, Jane P. Nelson 1980-7-6 Nelson 5984 Lassen T38N, R11W, S. 31 & 32. Ash Valley along Adin-Madeline Rd. 16 miles east of Adin. Sagebrush steppe. 1554 Comment
  CHSC30562  Juncus balticus Sori H. Shad 1970-7-1 5 Lassen Found on the side of spring above Gallaten Beach. 2438 Comment
  UC1100988  Juncus balticus Malcolm A. Nobs and S. Galen Smith 1949-7-21 1062 Lassen 4 mi n Madeline Comment
  UC1142944  Juncus balticus subsp. ater A. L. Hormay 1941-6-18 4 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  JEPS88220  Juncus brachyphyllus Vernon H. Oswald and Lowell Ahart 1996-6-17 7805 Lassen n side og Bizz Johnson Trail between Devils Corral Trailhead and 6.0 milepost (trailhead off Hwy 36 ca 7 mi w of Susanville); Modoc Plateau 1420 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
  JEPS127272  Juncus bufonius var. bufonius Lowell Ahart, John Dittes 2016-7-13 21140 Lassen 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. Comment
  CHSC99280  Juncus bufonius var. congestus Lowell Ahart; John Dittes 2008-6-20 14958 Lassen In meadow, around a new pond, about 30 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS126566  Juncus bufonius var. occidentalis Lowell Ahart, John Dittes 2016-6-7 20988 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. Comment
  UC1608994  Juncus hemiendytus var. hemiendytus Vernon H. Oswald and Lowell Ahart 1993-6-3 5483 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y), 2.4 mi n of its jct with Lassen 21 (32N02) to Eagle Lake (on w edge of Pine Creek Valley, between Poison Lake and Susanville); Pine Creek Valley 1728 Comment
  CAS-BOT-BC110769  Juncus mertensianus Clare B. Hardham 1969-8-28 17441 Lassen Sierra Nevada. West of Janesville. Comment
  UC1100950  Juncus mexicanus Verne Grant and Irving Schneider 1947-7-30 8191 Lassen s point of w embayment Tule Lake Comment
  HSC95202  Juncus nevadensis Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-28 512 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS28706  Juncus nevadensis George W. Gillett 1957-7-28 934 Lassen Widow Lake Lassen Volcanic National Park 2072 Comment
  UC1133633  Juncus nevadensis H. S. Yates 1936-8-12 6080 Lassen McKenzie Meadow Susanville 1524 Comment
  UCD141628  Juncus nevadensis G. Schoolcraft 1993-6-21 2301 Lassen Skedaddle Mountains. 1828 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
  HSC22875  Juncus orthophyllus John Pratt 1970-6-13 11 Lassen 1677 Comment
  SEINET3881686  Juncus sphaerocarpus Alice Eastwood, John Thomas Howell 1940-6-16 8339 Lassen Janesville.; 0 Comment
  JEPS121379  Juncus trilocularis Peter F. Zika 2008-7-14 23893 Lassen S side of Route 44, SE end of Grays Valley near Lodgepole, yellow pine forest Comment
  SBBG126190  Juncus trilocularis P. F. Zika 2008-7-14 23893 Lassen S side of St Hwy 44, SE end of Grays Valley near Lodgepole 1730 Comment
  CHSC96722  Juncus xiphioides Gordon Leppig 1998-7-12 945 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  CHSC3494  Juniperus californica Roger Jaegel 1966-5-14 152 Lassen Located twenty-two miles north of Susanville, along the bank of Eagle Lake at C. S. C. Biological Station. Comment
  SD139428  Juniperus grandis F. C. Vasek 1962-9-3 day 2 Lassen State highway 36, 3.6 miles west of Ranger Station, west of Susanville 1525 Comment
  CHSC5076  Juniperus occidentalis A. W. Harvilik 1967-6-23 9 Lassen Ca. 50 ft from Eagle Lake Biology Station. 1554 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
  UC766732  Juniperus occidentalis R. F. Hoover 1940-9-21 4606 Lassen 4 mi w Susanville Comment
  CHSC60293  Juniperus occidentalis var. occidentalis Mary Ann Showers 1992-6-13 2531 Lassen East shore of Butte Lake, ca 0.3 miles south of Butte Creek outlet. Lassen Volcanic National Park. 1841 Comment
  RSA719706  Juniperus occidentalis var. occidentalis Michael A. Vincent, K. Levings 2006-7-29 12922 Lassen Along Rt. 395 pull-off, 3.1 miles north of Rt. 70, 7.7 miles north of Sierra County line Comment
  UCR3789  Juniperus osteosperma Frank C. Vasek 1964-9-12 640912- 07 Lassen 5.2-5.4 mi north of the junction of US Hwy 395 w/ Calif. Hwy 70 (alt. US Hwy 40) 1479 Comment
  CHSC60920  Kelloggia galioides Vernon H. Oswald; Lowell Ahart 1993-7-8 5657 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CHSC6262  Kelloggia galioides W. Vinyard 1946-6-17 Lassen Eagle Lake. Mt. Fredonyer. 2133 Comment
  CHSC66402  Kelloggia galioides Vernon H. Oswald; Lowell Ahart 1996-6-17 7768 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of Hwy. 36 ca. 0.2 mi E of the 7 mile post. 1432 Comment
  UC1483816  Kelloggia galioides G. Schoolcraft 1981-7-28 337 Lassen s of Blue Lake (Bureau of Land Management) 2072 Comment
  UC773943  Kelloggia galioides L. R. Short and D. Gish 1936-6-10 S- 379 Lassen Burgess Spring Experiment Range; Lassen National Forest 1813 Comment
  UCR268962  Kelloggia galioides Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31426 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  SEINET10869776  Kelloggia galioides Mary Susan Taylor 1974-1 Taylor 273 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC7408  Kochia americana J. Burtt Davy Jun 17 1897-Jun 24 1897 3329 Lassen Honey Lake Valley 1219 Comment
  CHSC65307  Kochia scoparia Vernon Oswald; Lowelll Ahart 1995-8-14 7172 Lassen Modoc Plateau. Hwy. 395 crossing a flooded playa (Mud Flat) 1.8 mi N of Smoke Creek Ranch Rd., N of Susanville. 1348 Comment
  JEPS97318  Kochia scoparia Vernon H. Oswald and L. Ahart 1995-8-14 7172 Lassen T30N R15E center N side Sec. 15, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 crossing a flooded playa (Mud Flat) 1.8 mi N of Smoke Creek Ranch Rd., N of Susanville 1348 Comment
  CAS-BOT-BC180802  Kochia scoparia Louella Bass 1981-10-14 s.n. Lassen Standish Comment
  CAS-BOT-BC180850  Kochia scoparia Louella Bass 1981-9-29 s.n. Lassen Standish Comment
  UC773971  Koeleria macrantha L. R. Short and D. Gish 1936-6-5 S- 373 Lassen Burgess Spring Experiment Range 1798 Comment
  UCD85987  Koeleria macrantha R. Tofsrud 1947-7-1 214 Lassen 13 miles E of Madeline. Comment
  CAS-BOT-BC271327  Koeleria pyramidata Louella Bass 1973-6-3 92 Lassen Elysian Valley 1325 Comment
  UCR67465  Lactuca saligna George K. Helmkamp 1990-9-23 G- 13 Lassen north of Ravendale 1677 Comment
  CAS-BOT-BC349842  Lactuca tatarica subsp. pulchella Gary Schoolcraft 1986-9-4 1669 Lassen Along n. shore of Eagle Lake 33-12-30 1554 Comment
  CHSC71383  Lactuca tatarica subsp. pulchella Vernon H. Oswald; B. Corbin, G. Schoolcraft 1998-7-13 9256 Lassen Hwy. 139 along the east shore of Eagle Lake. Roadside. 1560 Comment
  CAS-BOT-BC341485  Lagophylla ramosissima John Thomas Howell 1974-7-10 50527 Lassen Elysian Valley 1325 Comment
  JEPS38999  Lagophylla ramosissima W. L. Jepson 1918-8-2 7776 Lassen Bedswith Pass 1463 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
  CHSC71865  Lagophylla ramosissima subsp. ramosissima Vernon H. Oswald; Lowell Ahart 1998-9-8 9575 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. 1255 Comment
  CHSC99279  Lasthenia glaberrima Lowell Ahart; John Dittes 2008-6-20 14901 Lassen Sides of a vernal pool, 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
  UC1573178  Lasthenia glaberrima Dean Wm. Taylor with Glenn L. Clifton, Rexford E. Palmer and Roy Buck 1988-6-6 9004 Lassen road from Bieber to Lookout (.5 mi s of the Modoc County Line); Pit River Watershed, Big Valley 1249 Comment
  POM29621  Lathyrus Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkins Ranch. 1829 Comment
  UC1137764  Lathyrus brownii August L. Hormay 1934-5-9 Lassen Black Mt. Headquarters Lassen National Forest 1706 Comment
  CHSC92742  Lathyrus nevadensis var. nevadensis L. P. Janeway 2005-7-3 8451 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  CAS-BOT-BC321496  Layia glandulosa Clare B. Hardham 1961-6-16 7486 Lassen Gold Run Creek, S of Susanville. Comment
  UC1609230  Layia glandulosa Vernon H. Oswald and Lowell Ahart 1993-6-14 5535 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), dunes on n side of rd); Eagle Lake 1566 Comment
  SEINET10759252  Layia glandulosa Jeffrey Huber 1971-6-2 Huber 143 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
  RSA715552  Layia glandulosa subsp. glandulosa L. Ahart, John Dittes 2005-6-1 11889 Lassen On the north side of Scott Road, Long Valley, about 4.25 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1434 Comment
  CHSC4847  Lemna minor R. Carter 1967-7-13 590 Lassen Along shore of Willow Creek. Comment
  JEPS89219  Lemna minuscula Mrs. R. M. Austin June, 1894 Lassen Cold Springs, Willow Creek Valley Willow Creek Valley; North East California, Cold Springs, Willow Creek Valley Comment
  UC55668  Lemna minuscula Mrs. R. M. Austin Jun 1894 Lassen Willow Creek Valley, Cold Springs Cold Springs; Willow Creek Valley, Cold Springs Comment
  JEPS406  Lemna trisulca W. L. Jepson 1918-8-16 8001 Lassen Merrillville 1524 Comment
  RSA318598A  Lemna trisulca Wayne P. Armstrong 1984-8-25 1218 Lassen Willow Creek-- at bridge on Highway 139 approximately 10 miles north of Susanville 1509 Comment
  CAS-BOT-BC88819  Lepidium campestre John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49226 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CHSC29943  Lepidium campestre Robin L. Ondricek 1978-6-19 61 Lassen Outside the lab at ELFS. 1554 Comment
  CHSC99534  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
  NY76543  Lepidium latifolium J. T. Howell 1975-7-23 51384 Lassen Eagle Lake Lumber Company yard, Susanville 1295.4 Comment
  CAS-BOT-BC12813  Lepidium perfoliatum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49209 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  SEINET10448701  Lepidium perfoliatum David B. Dunn, Jeffrey Huber 1971-6-2 Dunn 17749 Lassen 3 mi. S. Of hallelujah jct. On u.s. 395 & Calif 70. Along roadsides and in artemesia- grassland field. Comment
  UCD63910  Leptochloa fusca subsp. fascicularis Jesse V. Langdon 1954-10-14 Lassen Lassen Irrigation District, near Standish. 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
  CHSC27663  Leptosiphon harknessii Robert A. Schlising 1978-7-1 3304 Lassen S of Eagle Lake at east side of Mahogany Lake. 2060 Comment
  CHSC4771  Leptosiphon harknessii R. Carter 1967-6-27 562 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology station. 1584 Comment
  UC1553404  Leucocrinum montanum G. Schoolcraft 1988-5-11 1794 Lassen n of Said Valley Reservoir (along Hwy 139) 1676 Comment
  SEINET3887154 Image available Leucocrinum montanum D. W. McNeal 1981-5-10 2488 Lassen Beside Hwy. #395, 4.3 mi. S. of Ravendale.; 0 Comment
  CHSC71315  Lewisia nevadensis Vernon H. Oswald 1998-6-22 9231 Lassen Champs Flat Rd. (A-21) 1.8 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1749 Comment
  OBI79710  Lewisia rediviva Anthony Baniaga 2011-6-11 334 Lassen Lassen National Forest. Along Highway 139, ca. 4 mi S of Adin. quadrangle. 1326 Comment
  CAS-BOT-BC283771  Leymus cinereus John Thomas Howell 1974-7-10 50554 Lassen Elysian Valley 1325 Comment
  JEPS128173  Leymus cinereus M. C. Mahoney, J. A. Nash 2017-8-22 CA 350 -88 Lassen South of Pilgrim Lake of Buckhorn Byway. From Susanville take Highway 395 north to Buckhorn Byway and follow the road east past Buckhorn Reservoir and Dry Lake. Then take a right onto an unnamed road that is right on the CA/NV border. Continue for 1/2 mile. Population is on either side of the road. Comment
  JEPS68547  Leymus cinereus W. L. Jepson 1918-8-2 7795 a Lassen Raker Ranch Honey Lake Valley 1219 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
  UCD64266  Leymus cinereus A. H. Shunk 1923-7-28 Lassen Madeline. Comment
  POM113953  Leymus triticoides Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UCD86642  Leymus triticoides J. Earl Coke 1931-6-1 s.n. Lassen Lassen County. 1524 Comment
  UCD87721  Leymus triticoides R. N. Raynor 1939-6-3 s.n. Lassen Susanville. 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
  CAS-BOT-BC130512  Lilium pardalinum B. C. Cain 1925-8-24 99 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  HSC15585  Lilium pardalinum subsp. pardalinum Fred J. Kindel 1955-7-8 Lassen Susan River Comment
  UC485771  Lilium parvum H. E. Parks Jun 1928 222 Lassen Drakesbad; Lassen National Park Comment
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Dec 13 2006
  UC1567430  Limosella acaulis G. Schoolcraft 1989-7-24 1995 Lassen along n shore Said Valley Reservoir; n shore of Said Valley Reservoir 1630 Comment
  UC1609110  Limosella acaulis Vernon H. Oswald and Lowell Ahart 1993-6-14 5508 Lassen Lassen A21 (32N02) 5.3 mi e of Lassen 105 (32N28Y) ca 7 mi (air) w Eagle Lake (near Summit Camp); w of Eagle Lake 1889 Comment
  CAS-BOT-BC246146  Limosella aquatica Malcom A. Nobs; S. Galen Smith 1949-7-20 1046 Lassen Bieber, along Highway 299 Comment
  JEPS121274  Limosella aquatica Lowell Ahart, John Dittes 2013-7-23 18889 Lassen Man-made pond, about 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1609099  Limosella aquatica Vernon H. Oswald and Lowell Ahart 1993-6-28 5602 Lassen Rd 35N04 at Aspen Well n of Hwy 44 on the nw edge Harvey Valley (ne of Poison Lake); ne of Poison Lake 1725 Comment
  SEINET12765227  Linanthus ciliatus Vernon H. Oswald, Lowell Ahart 1997-6-24 8605 .1 Lassen South of Susan ville near the small pond on the crest of Diamond Mtn. at a stream on Forest Rd. 29N43, 3.5 miles east of Gold Run Rd. (29N10).; 0 1655 Comment
  UCR208968  Linanthus ciliatus Lowell Ahart 2005-6-2 11936 Lassen about 1.5 miles NE of the Anderson Ranch home, Long Valley, c. 6 miles (air) north of the intersection of Scott Road and Hwy 70, 7.5 miles (air) northwest of Halleluja Junction 1601 Comment
  CHSC6204  Linanthus pungens 1944-7-9 Lassen Eagle Lake. Dow Butte. 2042 Comment
  RSA170303  Linaria dalmatica T. C. Fuller 1963-7-15 10893 Lassen Along drainage way of n. facing slope, road to Pittville, 4.3 miles n.w. of Little Valley. 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
  CHSC13605  Lithophragma Lynn R Thomas 1969-4-17 96 Lassen Ca. 200 yds. up hillside e of Rice Canyon Rd., 5 mi n of junction with 'back road to Litchfield'. Ca 12 mi e of Susanville. 1310 Comment
  JEPS19372  Lithophragma glabrum L. R. Short 1936-4-28 S- 336 Lassen Burgess Spr. Exp. Range; Lassen <National> Forest, Burgess Spr. Exp. Range 1767 Comment
  CAS-BOT-BC435431  Lithophragma glabrum H. C. Cantelow 1941-5-22 s.n. Lassen Fredonyer Pass, 13.5 miles west of Susanville Comment
  HSC75899  Lithophragma tenellum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19163 Lassen 3 mi. N of Westwood Comment
  JEPS119670  Lithospermum arvense Lowell Ahart, John Dittes 2012-7-11 18351 Lassen About 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittvile, 3955 feet east of Lassen - Shasta County Line, Fall River Valley. Comment
  RSA0037174  Lithospermum arvense Lowell A. 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. 1205 Comment
  CHSC91203  Lithospermum ruderale Lowell Ahart; John Dittes 2005-6-2 11932 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
  UC1924235  Lithospermum ruderale Debra Valov 2004-6-9 2004259 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UC131185  Loeflingia squarrosa var. artemisiarum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  CAS-BOT-BC269059  Lolium perenne John Thomas Howell; Gordon H. True 1973-8-1 50187 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CHSC66229  Lomatium bicolor var. leptocarpum Vernon H. Oswald 1996-6-24 7855 Lassen Papoose Meadows located ca.0.5 mi E of Eagel Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  UC604536  Lomatium bicolor var. leptocarpum C. W. Sharsmith 1938-7-18 3633 Lassen 2 mi. s. Madeline (Madeline Plains); Madeline Plains Comment
  CHSC92830  Lomatium dissectum var. multifidum Lowell Ahart; John Dittes 2005-6-2 11930 Lassen Along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  UCD127690  Lomatium macrocarpum Richard R. Halse 1977-5-22 1549 Lassen U.S. Highway 395, 9.5 miles north of Madeline. 1490 Comment
  JEPS118215  Lomatium nevadense var. nevadense Dean W. Taylor 2004-5-11 19060 Lassen 1.5 miles southwest of Constantina along Highway 395 1402 Comment
  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
  UC1123084  Lomatium nevadense var. parishii A. Simontacchi 1940-5-10 689 A Lassen 7.3 mi. w. Havey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  CHSC29850  Lomatium nudicaule Robin Ondricek 1978-6-7 42 Lassen Lower Dry Lake along outer edges of shoreline. 1645 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
  RSA0049612  Lomatium ravenii Dean Wm. Taylor 2012-6-7 21233 Lassen 1 mile south of Ravendale (along Highway 395, 100 meters East of the highway ROW) 1615 Comment
  UC1479583 Image available Lomatium ravenii Gary Schoolcraft 1980-5-9 232 Lassen e Sierra Ordnance Depot (Herlong) (near CA-NV State line); e of Sierra Ordnance Depot (Herlong) 1219 Comment
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Oct 26 2017
  UC1167726  Lomatium tracyi Peter H. Raven with Otto T. Solbrig 1958-6-16 13248 Lassen 4.5 mi. e. Westwood (on State Hwy. 36) Comment
  HSC28305  Lomatium utriculatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19255 Lassen Harvey Valley near Cone Springs Comment
  UC1187701  Lomatium vaginatum Tracey and Viola Call 1961-5-30 2049 Lassen Horse Lake Road 1/8 mi w of jct with 395 about 1 1/2 mi s Ravendale; Horse Lake Road 1463 Comment
  RSA370319  Lomatium vaginatum A. Tiehm, Margaret Williams, Gary Schoolcraft 1986-5-12 10345 Lassen 6.7 road miles east of Highway 395 on dirt road to Smoke Creek and the Smoke Creek Desert 1418 Comment
  CHSC25907  Lotus K. R. Stern 1967-7-1 2464 Lassen Murrer Ranch, ca. 17 mi. NE of Susanville. Comment
  JEPS126486  Lotus corniculatus Valda Lockie, Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemky 2015-7-16 CA 350 -050 Lassen Take Smoke Creek Road to Sand Pass Road. Turn left at Parker Reservoir. Comment
  UC1567406  Lotus denticulatus G. Schoolcraft 1989-6-5 1896 Lassen s of Adin (intersection of Hwy 139 and A2) 1341 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
  JEPS117484  Lotus purshianus var. purshianus Lowell Ahart, John Dittes 2010-7-31 16999 Lassen On the north side of the road, about 15 yards west of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  UC773895  Lotus purshianus var. purshianus L. R. Short and J. Warren 1936-6-23 S- 447 Lassen Burgess Spring Experiment Range Lassen Forest Comment
  RSA253250  Lotus unifoliolatus A. A. Heller 1938-6-23 15199 Lassen Slope east of Fredonyer Pass. 1646 Comment
  SEINET5766201 Image available Lupinus M. S. Baker, Frank Nutting 1894-1 s.n. Lassen Big Valley Comment
  CHSC67218  Lupinus arbustus James D. Jokerst 1991-5-29 3302 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the N end of Eagle Lake, top of plateau E of N basin, W of N-S oriented dirt road. 1737 Comment
  JEPS28489  Lupinus arbustus George W. Gillett 1957-7-29 956 Lassen near the Butte Lake Trail (above Snag Lake); , near the Butte Lake Trail 1859 Comment
  HSC63936  Lupinus arbustus subsp. calcaratus Teresa Prendusi 1980-7-21 Lassen Fredonyer Peak near summit 2393 Comment
  CAS-BOT-BC208731  Lupinus argenteus var. heteranthus M. S. Taylor 1982-6-12 4653 Lassen Doyle, ca. 0.5 mi E of Hwy 395 Comment
  CAS-BOT-BC208750  Lupinus argenteus var. heteranthus Alice Eastwood; John Thomas Howell 1940-6-15 8317 Lassen Upper Willow Creek east of Hayden Hill Comment
  CAS-BOT-BC208766  Lupinus argenteus var. heteranthus Beeson 1927-7-11 21470 Lassen Bogard Ranger Station, Lassen Forest 1500 Comment
  JEPS65006  Lupinus argenteus var. heteranthus Frances D. Payne 1929-7-12 74 Lassen ridge above Lost Lake (northeastesrn Lassen County); Warner Moutnains, ridge above Lost Lake 2286 Comment
  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
  RSA160042  Lupinus argenteus var. heteranthus David B. Dunn 1956-7-3 11919 Lassen On Highway 395. Comment
  SEINET5327973  Lupinus argenteus var. heteranthus M. J. Williams 1974-7-29 74 -L-58 Lassen 2 mi west of Hallelujah Junction, south of Hwy. 50 1494 Comment
  HSC28310  Lupinus brevicaulis D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19280 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  NY746960  Lupinus breweri H. D. D. Ripley 1943-6-13 5709 Lassen 10 miles south of Milford 1768 Comment
  CAS-BOT-BC196641  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  SEINET10490714  Lupinus caudatus subsp. caudatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 481 Lassen 5 mi. S of milford near honey lake on us hwy 395; along roadside in grass - Artemesia tridentata assoc.; Quercus - jeffery pine on mountain range to w at Approx. The same altitude. 1250 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
  UCR18740  Lupinus corymbosus Frank C. Vasek 1975-7-11 75011- 21 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  JEPS81671  Lupinus lepidus var. confertus L. R. Heckard with T. I. Chuang and R. C. Bacigalupi 1968-8-12 2118 Lassen around Honey Lake just n Milford; Honey Lake just n of Milford 1310 Comment
  UC1035886  Lupinus lepidus var. confertus Annie M. Alexander and Louise Kellogg 1946-8-15 5159 Lassen Janesville Comment
  UC527349  Lupinus lepidus var. confertus C. B. Wolf 1931-9-6 2404 Lassen on the road to Wendel 1/2 mi from Janesville (western edge of Honey Lake Valley); western edge of Honey Lake Valley 1280 Comment
  SEINET8051629  Lupinus lepidus var. confertus M. J. Williams 1983-7-31 83- 126 -1 Lassen Roadside near Janesville 1280 Comment
  CHSC14189  Lupinus lepidus var. lobbii M. S. Taylor 1974-7-10 271 Lassen Collected roadside, ca. 3 mi s of Gallatin Beach, ca. 3 mi s of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  UC1137588  Lupinus lepidus var. lobbii A. Simontacchi 1940-6-30 909 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC5290  Lupinus lepidus var. sellulus 1944-2-7 Lassen Eagle Lake. McCoy Flat. 1645 Comment
  CHSC91526  Lupinus lepidus var. sellulus L. P. Janeway 2005-7-4 8474 Lassen High Cascade Range. Along Road 33N02 in Windy Gap; meadow between Harvey Valley and Grays Valley. 1696 Comment
  UCD18975  Lupinus lepidus var. sellulus Jack N. Reppert 1964-8-5 29 Lassen Lassen National Forest, Harvey Valley Allotment (HV 80-75). 1719 Comment
  OBI76907  Lupinus leucophyllus Anthony Baniaga 2011-7-9 437 Lassen Lassen Natl Forest. SW Pine Crk Valley. Pine Crk Valley quad. T31N R8E sec 10 NE of NE 1718 Comment
  UC506994  Lupinus leucophyllus George A. Fischer and Irwin H. Johnson 1933-7-12 204 Lassen Grass Valley. Comment
  NY747375  Lupinus leucophyllus var. leucophyllus H. D. D. Ripley 1943-6-13 5679 Lassen Milford 1265 Comment
  UC1533166  Lupinus microcarpus var. microcarpus Gary Schoolcraft 1981-9-1 572 Lassen along road 3 mi se Bieber 1249 Comment
  NY747487  Lupinus nevadensis B. J. Cox 1971-6-2 2595 Lassen Hallelujah Jct. intersection of U.S. 395 and Calif. Hwy 70 1433 Comment
  CHSC7671  Lupinus polycarpus Beverley J. Wise 1969-5-4 62 Lassen 0.5 mi west on Shaeffer Mtn lookout access road from junction with Hwy 395. 24.4 mi E. of Susanv. 1615 Comment
  UC1523758  Lupinus saxosus Gary Schoolcraft 1983-6-7 968 Lassen near Ash Valley 1706 Comment
  SEINET10490228  Lupinus sellulus var. artulus Katherine L. Morris 1973-5-25 Morris 233 Lassen Collected 7.6 mi nw of jct of hwy 36 and 44 on hwy 44, in an area of yellow Pine and incense cedar. Very moist area. Comment
  SEINET10490263  Lupinus subvexus var. transmontanus David B. Dunn 1956-7-3 Dunn 11925 Lassen Collected on roadside among volcanic rocks. Along hwy 395, 5.5 mi s of likely, Before dropping into valley. Color lavender. Sagebrush common. Comment
  CDA40729  Lycopus uniflorus Gordon Leppig, J. Cromwell 1997-7-27 625 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  JEPS97326  Lycopus uniflorus Vernon H. Oswald 1995-8-21 7208 Lassen T38N R15E NE1/4 Sec. 20, 6100 ft, Warner Mtns., Fresh-water Marsh in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 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
  CHSC112974  Lythrum tribracteatum Lowell Ahart; John Dittes 2013-7-23 18902 Lassen Dry drainage, 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
  RSA0011458  Madia R. F. Thorne, Larry E. DeBuhr 1975-8-22 46977 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  POM253193  Madia bolanderi A. A. Heller 1937-9-1 15342 Lassen Wet ground in a Tamrack swamp about 1 mile E of Westwood. 1524 Comment
  OBI55502  Madia citrigracilis David J. Keil 1992-7-25 23608 Lassen Along hwy 36, 9.1 mi E of Plumas County line, W of Susanville Comment
  UC1191847  Madia elegans Malcolm A. Nobs and S. Galen Smith 1949-8-20 1470 Lassen 1 mi s Milford (nw shore of lake); Honey Lake Valley Comment
  UCD134225  Madia elegans Malcolm A. Nobs; Galen Smith 1949-8-20 1470 Lassen Honey Lake Valley, 1 mile south of Milford. Comment
  POM29905  Madia elegans subsp. elegans Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 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
  CAS-BOT-BC334689  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  UCD134274  Madia glomerata J. M. Tucker 1950-7-25 1975 Lassen road from Pittville, 33 miles northwest of Susanville. Comment
  CHSC106081  Madia gracilis Lowell Ahart; John Dittes 2010-7-31 17006 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  POM37232  Malacothrix floccifera Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1616 Comment
  CAS-BOT-BC348030  Malacothrix torreyi Arnold Tiehm 1978-5-15 4159 Lassen .4 mile west of the Nevada stateline on highway 81 from Gerlach to Cedarville Comment
  CHSC4978  Malva neglecta R. Clicquennoi 1967-6-23 11 Lassen In a large vernal pool area 1/4 mi n of Eagle Lake Biology Station, e central side of Eagle Lake. 1554 Comment
  UC18838  Malvella leprosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3330 Lassen near the hot springs Honey Lake Valley 1219 Comment
  RSA312311  Malvella leprosa Verne Grant, Irving Schneider 1947-9-6 8386 Lassen Hot springs about one mile west of Wendel. Comment
  CHSC7653  Matricaria discoidea Jesse Langdon 1969-6-3 26 Lassen Susanville, Soil Conservation Office. 1310 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
  CHSC5216  Matricaria occidentalis P. Collett 1946-6-17 Lassen Eagle Lake. Willow Creek Valley. 1463 Comment
  SCFS2169  Medicago sativa H. Naqui 1965-7-13 130 Lassen PCT dunes [?] bridge, Hwy 139 1402 Comment
  UCD86379  Melica bulbosa L. Whitney 1935-7-11 3226 Lassen Camp 10, Fruit Grower's Supply Company. Lassen National Forest. Comment
  SCFS2161  Melilotus albus C. Meek 1969-7-8 77 Lassen On roadside along Hwy 139, 2 mi E of Ravenville Rd. 1524 Comment
  CHSC1017  Mentzelia albicaulis C. Palmiter 1946-6-13 Lassen Spaulding's, Eagle Lake. 1554 Comment
  JEPS124816 Image available Mentzelia albicaulis Joe Ammirati 1964-6-30 70 Lassen N. of Susanville ca. 12.3 mi. on HW 139. Comment
  NY22895  Mentzelia albicaulis LeDoux 1973-5-25 869 Lassen Collected 3 miles north of Milford, on Highway 395 at Honey Lake campgrounds Comment
  CHSC30625  Mentzelia congesta E. C. Taylor 1975-7-19 83 Lassen Summit of Galatin Peak. 2117 Comment
  UC1609444  Mentzelia congesta Vernon H. Oswald and Lowell Ahart 1993-6-14 5537 Lassen ca 2.0 m ENE Spaulding Tract Rd. (Eagle Lake Rd. (Lassen Al) at Sandy Beach on the W shore of Eagle Lake); Eagle Lake 1566 Comment
  UCR244033  Mentzelia congesta Jim Andre, G. L. Clifton 1993-6-3 19703 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
  CHSC66392  Mentzelia dispersa Vernon H. Oswald; Lowell Ahart 1996-6-17 7772 Lassen Biz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Scattered plants in dry soil on the edge of the trail on the N side of Hwy. 36 ca. 0.2 mi E of the 7 mile post. 1432 Comment
  JEPS127346  Mentzelia dispersa Lowell Ahart, John Dittes 2016-7-13 21124 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  UC420650  Mentzelia montana T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  CHSC66250  Menyanthes trifoliata Vernon H. Oswald; Lowell Ahart 1996-6-24 7890 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Locally abundant in shallow water on quaking bog athe the springs on the E side of the meadow. 1633 Comment
  SD8380  Micranthes bryophora Mrs. R. M. Austin 1882-8-7 Lassen Kings Valley Comment
  CAS-BOT-BC322656  Microseris laciniata Alice Eastwood; John Thomas Howell 1940-6-11 7998 Lassen Bieber Comment
  CHSC60821  Microseris laciniata subsp. laciniata Vernon H. Oswald; Lowell Ahart 1993-6-28 5588 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. Meadow. 1719 Comment
  CAS-BOT-BC349300  Microseris nutans A. M. Vollmer; L. Beane 1953-7-1 53 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  UC450131  Microseris nutans Franklin P. Nutting Lassen s side Dixie Mt. Comment
  CHSC61166  Microsteris gracilis Vernon H. Oswald; Lowell Ahart 1993-5-12 5376 Lassen Canal crossing Hwy. 44, 3.5 mi NW of A21 ( to Westwood). 1729 Comment
  CHSC99150  Microsteris gracilis Lowell Ahart; John Dittes 2008-6-20 14929 Lassen Around 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
  SEINET10902895  Microsteris gracilis Mary Susan Taylor 1974-5-4 Taylor 227 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  RSA104218  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-17 9799 Lassen South of Secret Valley, north of Litchfield 1311 Comment
  RSA104220  Microsteris gracilis subsp. humilis Verne Grant, Alva Grant 1956-5-18 21757 Lassen Sage brush flat about Lassen County: 8 miles S of Madeline 1280 Comment
  NY963916  Microsteris gracilis var. gracilis W. W. Eggleston 1911-5-29 6762 Lassen Vicinity of Doyle Station 1290 Comment
  UC1609128  Mimulus breviflorus Vernon H. Oswald and Lowell Ahart 1993-7-8 5652 Lassen 1.9 mi n Hwy. 44 (Pittville Rd. (Lassen 111, 36N01), se edge of lake, on the e side of the railroad, which parallels the lake shore at this point); Poison Lake 1709 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
  RSA716144  Mimulus floribundus L. Ahart, John Dittes 2005-6-2 11970 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
  HSC95322  Mimulus guttatus Gordon Leppig, Tony LaBanca, Leonel Arguello 1997-6-29 533 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1012180  Mimulus guttatus Francis W. Pennell 1940-6-10 25778 Lassen 3 mi e Westwood (Route 36) 1584 Comment
  UC886176  Mimulus guttatus A. A. Heller 1938-6-22 15183 Lassen 1 mi s Westwood 1524 Comment
  JEPS2648 Image available Mimulus jepsonii W. L. Jepson 1910-6-10 4112 Lassen Twin Lakes (Grassy Lake); ; Twin Lakes (Grassy Lake), Lassen Co. 2225 Comment
  JEPS11447  Mimulus microphyllus Brown and Wieslander 1922-7-30 39 Lassen Martin Springs Eagle Lake 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
  SEINET10830517  Mimulus nanus Mary Susan Taylor 1974-1 Taylor 311 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA411323  Mimulus nanus var. jepsonii Christopher Davidson 1974-7-25 2499 Lassen Lassen Volcanic Nat. Park. At Juniper Lake. 2134 Comment
  RSA535802  Mimulus nanus var. mephiticus David M. Thompson 1988-6-1 923 Lassen 2.7 mi NW of Milford along Hwy 395. 1250 Comment
  UC1063561  Mimulus nanus var. nanus A. Simontacchi 1940-5-14 718 Lassen 3.5 mi sw Patterson Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC726696  Mimulus pulsiferae A. A. Heller 1938-6-22 15187 Lassen one mi e Westwood 1524 Comment
  HSC26596  Mimulus pygmaeus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19272 Lassen In Harvey Valley near Cone Springs Comment
  RSA536394  Mimulus pygmaeus Beth Corbin, Kim Earll, Steve Klukkert 1991-6-18 627 Lassen Gray's Valley, 4 miles N of USFS Bogard Work Center. 1715 Comment
  CAS-BOT-BC9536  Mimulus rubellus Clarence Roy Quick 1962-6-17 62 -21 Lassen Swains Hole, south of Blacks Mountain Experimental Station 1554 Comment
  CAS-BOT-BC221780  Monardella odoratissima Gordon H. True 1936-6-27 552 Lassen Between Bull Flat and Hot Spring Mt. 1524 Comment
  SEINET13948657 Image available Monardella odoratissima Ralph K. Gierisch 1968-1 3354 Lassen Highway 44; 5700 ft alt., T31N, R8E, SEC23 1737 Comment
  CHSC5270  Monardella odoratissima subsp. glauca W. Vinyard 1946-6-11 Lassen Pine Creek. 1580 Comment
  CHSC5272  Monardella odoratissima subsp. glauca J. B. Kimsey 1946-6-11 Lassen Pine Creek, near Eagle Lake. 1580 Comment
  SEINET3152591  Monardella odoratissima subsp. glauca L. S. Rose 1940-6-15 40593 Lassen 10 mi. N of Susanville, Round Valley. 1524 Comment
  UC2035864  Monardella odoratissima subsp. glauca John Thomas Howell 1934-7-8 12487 Lassen Spalding's Eagle Lake Comment
  UCR244066  Monardella odoratissima subsp. glauca Jim Andre, G. L. Clifton 1993-6-9 19692 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CAS-BOT-BC213931  Monardella odoratissima subsp. pallida Ralph K. Gierisch 1968-7-11 3354 Lassen Highway 44, Lassen National Forest 1737 Comment
  CHSC29865  Monardella odoratissima subsp. pallida Robin L. Ondricek 1978-8-9 122 Lassen 1977 Burn, .1 mi w of intersection with road which passes Colman Lake. [Sanders 2010 annotation: Monardella odoratissima Benth. ssp. pallida X ssp. glauca.] 1889 Comment
  CHSC63392  Monolepis nuttalliana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6315 Lassen Cold Springs near Clarks Valley Rd. (Lassen 510) ca. 11 mi E of Madeline. 1871 Comment
  CAS-BOT-BC444694  Montia chamissoi Malcom A. Nobs; S. Galen Smith 1949-7-21 1064 Lassen 4 miles north of Madeline Comment
  CHSC4797  Montia chamissoi R. Carter 1967-7-7 583 Lassen Collected at W end of reservoir in open wet meadow. Deans Meadow, 6.3 mi S of Eagle Lake Biology Station. 1828 Comment
  CHSC59564  Montia chamissoi Mary Meyer 1980-5-15 531 Lassen In streams along rocks and in moist riparian sites. 1371 Comment
  NY497728  Montia chamissoi G. Schoolcraft 1993-6-1 2272 Lassen Upper Secret Creek, south of Tule Patch Spring 1463.0 Comment
  CHSC60845  Montia linearis Vernon H. Oswald; Lowell Ahart 1993-6-28 5611 Lassen N of Hwy 44 on Rd. 33N06, on the SSE flank of Harvey Mtn., NNE of Burgess Meadow, NE of Poison Lake. 1798 Comment
  UC1101599  Muhlenbergia asperifolia Malcolm A. Nobs and S. Galen Smith 1949-8-20 1480 Lassen marshy banks of creek 1 mi n Doyle; Honey Lake Valley, Long Creek Comment
  UCD86529  Muhlenbergia asperifolia August L. Hormay 1932-8-12 s.n. Lassen Lassen National Forest. South E edge of Eagle Lake. Comment
  CDA32541  Muhlenbergia filiformis Gordon Leppig 1998-7-12 958 Lassen Northern California Peatlands; Modoc National Forest, Blue Lake Ranch. Comment
  HSC95304  Muhlenbergia filiformis Gordon Leppig, Juli Neander, Kai Neander 1997-7-25 680 Lassen Modo National Forest, Blue Lake Ranch. 1970 Comment
  RSA129384  Muhlenbergia filiformis H. S. Yates 1936-8-12 6018 Lassen Susanville. 1524 Comment
  RSA256304  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-6-5 6237 Lassen 25 miles NW of Susanville along Hwy 44 in Lassen Nat'l Forest 1768 Comment
  RSA256324  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-7-1 6240 Lassen 25 miles NW of Susanville along Hwy 44 in Lassen Nat'l Forest 1768 Comment
  RSA129676  Muhlenbergia richardsonis G. A. Fischer, Irwin Johnson 1933-7-12 F- 224 Lassen Lassen National Forest; Stringer Meadow. 1723 Comment
  RSA268996  Muhlenbergia richardsonis J. R. Reeder 1972-7-24 5806 Lassen Lassen National Park 1921 Comment
  SJSU4296  Muhlenbergia richardsonis J. W. Tilden 1960-6-27 1511 Lassen outskirts of Westwood, foot of Moonlight Rd 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-BC515650  Muilla transmontana H. D. Ripley; R. C. Barneby 1944-5-29 5953 Lassen South of Jamesville 1280 Comment
  CHSC61171  Myosurus apetalus var. borealis Vernon H. Oswald; Lowell Ahart 1993-5-12 5392 Lassen N side of Hwy. 44 between Old Station and Poison Lake, 0.6 mi E of the Shasta County line. 1645 Comment
  CHSC68760  Myosurus minimus Vernon H. Oswald; Lowell Ahart 1997-5-27 8518 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy.139. 1682 Comment
  UC1584005  Myosurus minimus G. Schoolcraft 1990-5-16 2055 Lassen just e Third Butte 1267 Comment
  CHSC5257  Myriophyllum sibiricum A. Santos 1946-7-12 Lassen Eagle Lake. Pine Creek Slough. 1584 Comment
  SEINET3095964 Image available Myriophyllum sibiricum Arnold Tiehm, Gary Schoolcraft 1984-8-14 9243 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1698 Comment
  UC1101499  Myriophyllum sibiricum Verne Grant and Irving Schneider 1947-7-30 8195 Lassen W end of Tule Lake. Comment
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Aug 12 2008
  JEPS124839 Image available Myriophyllum sibiricum John Degenfelder 1969-7-8 85 Lassen on highway 139 about 16 miles north of Susanville. Comment
  JEPS107305  Nama aretioides var. californica Lowell Ahart, John Dittes 2005-6-1 11886 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
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Jun 18 2007
  RSA0084057  Nama aretioides var. californica Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  UC133072  Nama aretioides var. multiflora Dr. Gustav Eisen 1891-1 Lassen Honey Lake Comment
  UC1609382  Nama densa var. densa Vernon H. Oswald and Lowell Ahart 1993-7-8 5658 Lassen Pittville Road (Lassen 111, 36N01) 1.9 mi n of Highway 44 (on se edge of Poison Lake); se edge Poison Lake, Pittville Road 1709 Comment
  CHSC23862  Navarretia breweri K. R. Stern 1974-6-26 5856 Lassen Ditch bank beside railroad track, e side of Poison Lake Rd. to Pittville, 1.8 mi nw of intersection with Hwy. 44. Comment
  CHSC4873  Navarretia breweri R. Carter 1967-6-23 543 Lassen Ca. 5 yds. off N side of road. Comment
  CHSC60842  Navarretia breweri Vernon H. Oswald; Lowell Ahart 1993-6-28 5592 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. On the bed of a vernal pool in a meadow. 1719 Comment
  UC1537486  Navarretia breweri Gordon H. True Jr. 1936-6-25 541 Lassen e of Harvey Ranger Station; Harvey Valley 1706 Comment
  HSC23507  Navarretia breweri W. Lessig 1967-7-1 11 Lassen 10 mi. N of Susanville on Hwy. 139 1829 Comment
  UC773937  Navarretia divaricata L. R. Short and Wm. Gansberg 1936-7-3 S- 473 Lassen Burgess Spring Experiment Range Lassen Forest 1844 Comment
  CHSC23850  Navarretia divaricata subsp. vividior K. R. Stern 1974-6-22 5850 B Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  SEINET3894761  Navarretia intertexta Leigh A. Johnson, Haley M. Smith 2011-6-25 11 -073 Lassen Nubieber. Adjacent to New Cemetary Road (1.1 miles west of Babcokc Rd in Nubieber) just beyond its jct with Hwy 299, between Hwy and road.; 0 Comment
  UCD32670  Navarretia intertexta Beecher Crampton 1954-7-6 2072 Lassen Lassen County, 17 miles south of Ravendale, along US highway 395. 1524 Comment
  CHSC112979  Navarretia intertexta subsp. propinqua Lowell Ahart; John Dittes 2013-7-22 18853 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1594649  Navarretia intertexta subsp. propinqua Vernon H. Oswald and Lowell Ahart 1992-7-16 5111 Lassen s side Hwy. 44 (Bridge Creek entering McCoy Flat Reservoir, between Old Station and Susanville); McCoy Flat Reservoir, Bridge Creek 1691 Comment
  CHSC1252  Navarretia leptalea K. Chew 1951-7-8 Lassen Stephens Meadows, Pine Creek. 1706 Comment
  CHSC1253  Navarretia leptalea 1951-7-8 Lassen Pit River. 1524 Comment
  CHSC113072  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2013-7-22 18852 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC117270  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2016-7-15 21213 Lassen About 300 yards west of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) notheast of Bieber, Big Valley. 1261 Comment
  CHSC89737  Navarretia leucocephala subsp. minima L. P. Janeway 2004-6-26 8145 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
  JEPS114396  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2008-6-20 14952 Lassen about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  POM75594  Navarretia leucocephala subsp. minima Marcus E. Jones 1897-6-18 10107 Lassen Chat. 1524 Comment
  UC23714  Navarretia leucocephala subsp. minima M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  SEINET12319552  Navarretia minima L. B. Barlow 1967-1 82 Lassen 6 mi N Susanville, Hwy 139 1524 Comment
  SEINET14160494  Navarretia sinistra D. W. Taylor 2012-7-18 21281 Lassen Cascade Ranges, Windmill Flat (9tributary Juniper Creek, Pit River watershed, 11 miles S of Adin), Letterbox Hill. 1707 Comment
  JEPS114643  Nemophila pedunculata Lowell Ahart, John Dittes 2008-6-20 14918 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
  POM73805B  Nemophila pedunculata Marcus E. Jones 1897-7-1 s.n. Lassen Susanville at Perkin s Ranch. 1524 Comment
  HSC30192  Nemophila spatulata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19156 Lassen 3 mi. N of Westwood Comment
  CHSC4786  Neoholmgrenia andina R. Carter 1967-6-29 572 Lassen On roadside, N side of Rd. Along road to Murrer's Meadow, Eagle Lake. 1584 Comment
  CHSC31980  Nicotiana attenuata L. Ahart 1974-7-9 544 Lassen Along Hwy 395, 1 mi n of jct Hwy 70 and Hwy 395. 1524 Comment
  CDA41135  Nicotiana attenuata T. C. Fuller 1962-8-28 9477 Lassen Secret Valley, Highway 395, 3.3 miles north of road to Karlo. 0 Comment
  HSC21264  Nicotiana attenuata R. G. Means 1962-7-4 67 Lassen 7 mi. N of Susanville, Hwy. 139 1585 Comment
  CDA23453  Nitrophila occidentalis Lee Wheeler 1961-8-11 Lassen On the John Capezzoli Ranch in Standish. 0 Comment
  CDA18261  Nothocalais alpestris G. D. Barbe 1974-8-2 1923 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  CHSC60720  Nothocalais troximoides Vernon H. Oswald; Lowell Ahart 1993-6-14 5504 Lassen Champs Flat Rd. (Lassen A21/105, Forest 32N02), 1.8 mi N of Hwy 44, between Poison Lake and Susanville. 1749 Comment
  HSC68183  Nothocalais troximoides J. P. Smith, J. O. Sawyer 1971-5-23 4658 Lassen Along Hwy. 139, 23 miles south of junction with road to Thermo. Comment
  CAS-BOT-BC400059  Nuphar polysepala Marcus E. Jones 1897-6-24 s.n. Lassen 10-15 miles west from Amedee 1219 Comment
  JEPS124825 Image available Oenothera deltoides C. Meek 1969-7-8 68 Lassen Along Hi #395, 1 mi south of intersection to Herlong Army Depot, 8 mi. south of Milford. Comment
  OBI48977  Oenothera deltoides Lewis S. Rose 1940-6-16 40598 Lassen Buntinville 1280 Comment
  CHSC106678  Oenothera deltoides subsp. piperi Zachary Garcia 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  SJSU10936  Oenothera deltoides subsp. piperi G. R. Ostrander 1965-7-12 70 Lassen by Hwy 395, 5 mi N of Doyle 1158 Comment
  NY998639  Oenothera deltoides var. piperi W. W. Eggleston 1911-5-29 6745 Lassen Vicinity of Doyle Station 393 Comment
  UC174846  Oenothera elata subsp. hirsutissima T. S. Brandegee 1892-6-29 Lassen Janesville Comment
  RSA8247  Oenothera flava Elmer I. Applegate 1929-6-24 5881 Lassen Big Valley south of Bieber Comment
  RSA27327  Oenothera flava C. L. Hitchcock 1940-5-26 6642 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  SEINET3150416  Oenothera tanacetifolia E. K. Balls 1950-5-9 15954 Lassen 5 mi. S of Modoc Co. line, Hwy 395 1219 Comment
  CHSC29904  Onobrychis viciifolia Robin L. Ondricek 1978-6-6 33 Lassen 1.2 mi from Hwy 139 on the road to Eagle Lake Field Station. 1499 Comment
  CHSC9548  Onobrychis viciifolia R. Clicquennoi 1967-6-24 13 Lassen .2 mi w of main rd. 3 mi e of Eagle Lake Biological Station on rd. to Murrer's Meadow. 1554 Comment
  CAS-BOT-BC350039  Oreostemma alpigenum var. andersonii A. A. Heller 1937-9-1 15343 Lassen About a mile east of Westwood 1524 Comment
  CAS-BOT-BC350040  Oreostemma alpigenum var. andersonii M. S. Jussel 1931-9-7 s.n. Lassen Bumpas Hell Trail, Mt. Lassen 2133 Comment
  CHSC65153  Orobanche corymbosa Vernon H. Oswald; Lowell Ahart 1995-7-5 6956 Lassen Modoc Plateau. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. 1383 Comment
  UC773942  Orobanche corymbosa subsp. corymbosa L. R. Short and J. Warren 1936-6-30 S- 465 Lassen NW of Eagle Lake, Burgess Spring Experiment Range. Comment
  CAS-BOT-BC499907  Orobanche fasciculata R. J. Dobbs 1928-5-23 s.n. Lassen Strawberry Pek switchback 1219 Comment
  CHSC12936  Orthocarpus cuspidatus subsp. cryptanthus K. R. Stern 1974-6-26 5870 Lassen N margin of meadow on s side of Hwy. 44, 5.6 mi n of intersection with County Rd. A-21 to Westwood. Comment
  CHSC23505  Orthocarpus cuspidatus subsp. cryptanthus Wayne O. Baum 1970-7-7 70 -2 Lassen Top of Gallatin Peak. 2117 Comment
  JEPS17630  Orthocarpus cuspidatus subsp. cryptanthus Rimo Bacigalupi with G. T. Robbins 1955-7-20 5412 Lassen 4.4 mi s Patterson Ranger Station (near eastern edge of Long Valley Meadow, southern tip of the Warner Mountains); southern tip of Warner Mountains, eastern edge Long Valley M 2057 Comment
  UC773854  Orthocarpus cuspidatus subsp. cryptanthus L. R. Short and J. Warren 1936-6-23 S- 453 Lassen Burgess Spr. Exp. Range; Lassen Forest, Burgess Spr. Exp. Range 1743 Comment
  RSA165526  Orthocarpus hispidus Clare B. Hardham 1961-6-17 7501 Lassen Baxter Creek S of Susanville. Comment
  RSA39737  Orthocarpus lacerus Philip A. Munz 1947-5-20 11890 Lassen Milford. 1265 Comment
  SD7584  Osmorhiza occidentalis Mrs. R. M. Austin 1879-1 Lassen 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
  HSC69079  Packera cana Gary Schoolcraft 1979-7-11 143 Lassen S-face of Observation Peak 2317 Comment
  UCD134780  Packera eurycephala Michael A. Vincent 1999-6-9 8581 Lassen Along US Rt. 395, south of Ravendale Fire Station, 1.8 miles north of rest area, and 24.8 miles north of Litchfield. 1524 Comment
  CAS-BOT-BC228565  Packera indecora Kirsten Bovee 2012-7-10 s.n. Lassen Lassen National Forest: 200 m south of Pine Creek near type locality 1706 Comment
  CHSC7639  Packera multilobata Beverley J. Wise 1969-5-3 27 Lassen 4.5 mi. east of junction of Hwy 395 and Las. Co. 338 (Smokey Creek Road). 1554 Comment
  CHSC93246  Packera streptanthifolia John Dittes; Scott Chamberlain 2004-6-28 1011 Lassen Modoc Plateau; Long Valley; ca. 2.0 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1448 Comment
  OBI76965  Packera streptanthifolia Anthony Baniaga 2011-8-4 488 Lassen Lassen Natl Forest. About 1/2 mi WNW of Griffith Hill, ca. 40 ft N of 30N21. Swain Mtn Quad. T30N R8E sec 5 SW of SW 1918 Comment
  UC1126132  Paeonia brownii A. Simontacchi 1940-6-8 834 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET10537847  Paeonia brownii Mary Susan Taylor 1982-8-27 Taylor 5053 Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  CHSC112794  Panicum Lowell Ahart; John Dittes 2013-7-23 18909 Lassen On the east side of the gravel road, north-south road west of Big Canal, 0.76 mile north of State Highway 299, 4.9 miles (air) northeast of Bieber, Big Valley. 1257 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
  UC149529  Panicum capillare J. Burtt Davy Jun 17 1897-Jun 24 1897 3346 Lassen Honey Lake Valley Comment
  UC1101564  Paspalum distichum Malcolm A. Nobs and S. Galen Smith 1949-8-20 1479 Lassen 1 mi n Doyle (banks of Long Creek); Honey Lake Valley, banks of Long Creek Comment
  CDA5489  Pastinaca sativa T. C. Fuller 1959-7-7 2793 Lassen North of Cornell Street, west of Foss Street, Susanville. 0 Comment
  CHSC65122  Pectiantia pentandra Vernon H. Oswald; Lowell Ahart 1995-7-24 7142 Lassen Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. 1905 Comment
  CHSC71076  Pectocarya penicillata Vernon H. Oswald; Lowell Ahart 1998-5-22 9092 Lassen Hwy. 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  JEPS94120  Pectocarya penicillata Vernon H. Oswald and Lowell Ahart 1998-5-22 9092 Lassen Hwy. 395 at intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  HSC68839  Pedicularis centranthera Gary Schoolcraft 1980-4-30 211 Lassen W of Shaffer Well, N of Shaffer Mtn. 1354 Comment
  OBI75871  Pedicularis groenlandica Anthony Baniaga 2011-8-9 494 Lassen Lassen Natl Forest. About 1/2 mi W of Griffith Hill, S of 30N21. Swain Mtn quad T30N R8E sec 8 NW of NW 1950 Comment
  RSA121814  Pedicularis semibarbata G. A. Fischer, Irwin H. Johnson 1933-7-14 F- 272 Lassen Lassen Forest. 1738 Comment
  CHSC60416  Penstemon cinicola Mary Ann Showers 1992-6-12 2516 Lassen Lassen Volcanic National Park. Meadow enclosed by lava flow, Buttle Lake. 1859 Comment
  JEPS11489  Penstemon cinicola Jos. Grinnell 1928-6-26 Lassen Butte Lake 1889 Comment
  UC153407  Penstemon cinicola Milo S. Baker Aug 1894 152 Lassen Pine Creek Comment
  JEPS27949  Penstemon davidsonii var. davidsonii Frances D. Payne 1929-7-12 82 Lassen above Camp 1, N of Lost Lake Warner Range, E slope of southern end 2286 Comment
  HSC68837  Penstemon deustus Gary Schoolcraft 1979-6-26 97 Lassen Small peak N of Radeo Flat 1951 Comment
  CHSC4272  Penstemon deustus var. pedicellatus K. R. Stern 1967-6-24 2426 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  HSC81803  Penstemon deustus var. pedicellatus Thomas W. Nelson, Jane P. Nelson 1980-7-6 6035 Lassen Ash Valley, along branch road off Adin-Madeline Rd., just S of bridge over Ash Creek, 16 mi. SE of Adin, 2.5 mi. SE of junction with main road 1555 Comment
  CHSC57320  Penstemon gracilentus Mary Meyer 1980-7-21 Lassen 2072 Comment
  CHSC62007  Penstemon gracilentus Eenam Sin 1992-6-3 26 Lassen North east corner at the base of Gallatin Peak. 1524 Comment
  JEPS11268  Penstemon gracilentus Brown and Wieslander 1922-7-25 5 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  RSA746506  Penstemon gracilentus K. M. Meyer, A. Townesmith 2007-7-23 157 Lassen Lassen National Forest. 3.9 miles SW on 32N10 off hwy. 44. (turn at rest area). 1900 Comment
  POM43270  Penstemon miser Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  RSA21708  Penstemon neotericus Carl B. Wolf 1937-8-7 9068 Lassen Northern Sierra Nevada. Red Bluff -Susanville Road, 11.5 mi E of Chester. 1494 Comment
  JEPS7228  Penstemon newberryi var. newberryi W. L. Jepson 1910-6-11 4116 Lassen Cinder Cone 2133 Comment
  CHSC36485  Penstemon roezlii Margaret E. Halloran 1982-6-4 3 Lassen .5 mi e Murrers Upper Meadow on road to meadow. Comment
  JEPS29104  Penstemon roezlii Lauramay T. Dempster 1961-6-17 1680 Lassen just w Tule Mountain; just w of Tule Mountain 1645 Comment
  JEPS94531  Penstemon roezlii Vernon Oswald and Lowell Ahart 1997-6-24 8623 .1 Lassen s of Susanville (on n side of Diamond Mountain on Forest Road 21N52 1.0 mi sw of its junction with 29N43); Diamond Mountain, Forest Road 21N52 2164 Comment
  UC1924214  Penstemon roezlii Debra Valov 2004-6-9 2004269 Lassen Hwy 139 c. 1 km S of Junction of County A2 1356 Comment
  UC1924562  Penstemon roezlii Debra Valov 2006-5-29 2006034 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1294 Comment
  SEINET12320798  Penstemon rydbergii M. S. Taylor 1974-1 287 Lassen ca 2 mi E of Gallatin Beach, ca 1/2 mi S of Eagle Lake, ca 13 mi NW of Susanville 1524 Comment
  SEINET12326936  Penstemon rydbergii L. E. Ray 1967-1 100 Lassen 8 mi S ELBS, Deans Meadow 1951 Comment
  CAS-BOT-BC239498  Penstemon rydbergii var. oreocharis John Thomas Howell 1976-7-20 s.n. Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC239507  Penstemon rydbergii var. oreocharis John Thomas Howell 1934-7-7 12460 Lassen Bogard Ranger Station Comment
  CHSC30588  Penstemon rydbergii var. oreocharis Marc Held 1972-6-29 23 Lassen South end of Dean's Meadow. Comment
  CHSC4791  Penstemon rydbergii var. oreocharis R. Carter 1967-7-7 582 Lassen Collected at W end of reservoir. Deans Meadow, 6.3 mi S of Eagle Lake Biology Station. 1828 Comment
  POM252929  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-22 15182 Lassen Along Hwy 36, 1 mile east of Westwood. 1524 Comment
  UC1137681  Penstemon rydbergii var. oreocharis George A. Fischer and Irwin H. Johnson 1933-7-12 F 228 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1737 Comment
  UC506978  Penstemon rydbergii var. oreocharis George A. Fischer and Irwin H. Johnson 1933-7-12 F 228 Lassen Patterson Flat Lassen National Forest, Patterson Flat 1737 Comment
  CHSC13894  Penstemon speciosus L. E. Ray 1967-6-24 33 Lassen Collected ca. 3 mi. se ELBS, above Upper Murrer Meadow. 1524 Comment
  CHSC64811  Penstemon speciosus Vernon H. Oswald 1995-5-31 6812 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 2.0 mi e of Hwy. 395, between Litchfield and Ravendale. 1341 Comment
  HSC63768  Penstemon speciosus Teresa Prendusi 1980-7-1 Lassen Champs Flat, 6 mi. W of N tip of Eagle Lake 1768 Comment
  JEPS95972  Penstemon speciosus Vernon H. Oswald and L. Ahart 1999-6-9 9747 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  NY661040  Penstemon speciosus G. W. Gillett 1953-7-1 273 Lassen Fredonyer Pass, Highway 36. Lassen National Forest. 1752.6 Comment
  UC1520676  Penstemon speciosus Noel H. Holmgren and Patricia K. Holmgren 1980-7-5 9518 Lassen 19 km (12 mi) airline distance ese Ravendale (14.8 km (9.2 mi) e U.S. Highway 395 via Rye Patch Canyon, Upper Smoke Creek drainage); Upper Smoke Creek drainage 1680 Comment
  UC1527430  Penstemon speciosus Gordon H. True Jr. 1936-6-25 529 Lassen e Harvey Ranger Station (Harvey Valley); , e of Harvey Ranger Station 1767 Comment
  UC1583941  Penstemon speciosus G. Schoolcraft 1990-7-2 2100 Lassen sw slopes of Cold Spring Mtn. 1889 Comment
  NY661042  Penstemon speciosus P. A. Munz 1947-5-19 11877 Lassen Highway 395, 3.5 miles south of Ravendale 1615.4 Comment
  CAS-BOT-BC243411  Penstemon sudans David D. Keck 1930-7-23 948 Lassen Susanville 1280 Comment
  JEPS103201  Penstemon sudans G. Schoolcraft 1990-7-2 2101 Lassen top of Cold Spring Mountain 2130 Comment
  NY661796  Penstemon sudans A. A. Heller 1938-6-23 15194 Lassen East of Fredonyer Pass 1615.4 Comment
  NY661808  Penstemon sudans D. D. Keck 1935-6-25 3756 Lassen Susanville; just west of town Comment
  OBI75899  Penstemon sudans Anthony Baniaga and R. Bomberger, R. Bomberger 2011-7-28 478 Lassen Lassen Natl Forst. Hwy 36, ca. 1/4 mi E of "Fredonyer Pass Winter OHV Parking Lot" Fredonyer Pass quad T29N R10E sec 2 NW of SW 1950 Comment
  UC2027337  Penstemon sudans Anthony Baniaga and R. Bomberger 2011-7-28 478 Lassen Lassen National Forest. Highway 36, ca. 1/4 mi E of Fredonyer Pass Winter OHV Parking Lot Fredonyer Pass quadrangle Comment
  OBI82794  Penstemon venustus Robert L. Johnson, Mikel R. Stevens 2015-7-10 3935 Lassen E of Freydonyer Pass. 6.2 rd mi west on Hwy 36 after jct with Hwy 44. S side of rd. Ca 11 air mi wsw of Susanville.; 0 1659 Comment
  HSC100162  Peraphyllum ramosissimum J. P. Smith, & J. O. Sawyer 2011-8-14 13377 Lassen Along service road, 1.8 mi. from Hwy. 395. 1541 Comment
  UC1087229  Perideridia bolanderi subsp. bolanderi Peter H. Raven and Otto T. Solbrig 1958-6-16 13252 Lassen 4.5 mi e Westwood Comment
  UC1123141  Perideridia bolanderi subsp. bolanderi A. Simontacchi 1940-6-11 846 Lassen 3.7 mi sse Black Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET7929369  Perideridia bolanderi subsp. bolanderi David French 1968-6-3 2882 Lassen N of Honey Lake, W side of hwy 395, 7.4 mi NE of Litchfield.; 0 Comment
  SEINET11153899  Perideridia gairdneri subsp. borealis M. S. Baker July 31 (no year) s.n. Lassen Silver Lake. Comment
  CAS-BOT-BC423343  Peritoma platycarpa A. A. Heller 1938-6-23 15207 Lassen On the grade east of Litchfield, on U. S. Highway #395 1371 Comment
  SEINET5845147  Peritoma platycarpa J. A. Young 1982-6-7 s.n. Lassen Redlands 1676 Comment
  UCD20364  Peritoma platycarpa Joe DiTomaso 2002-6-4 s.n. Lassen About 3 miles northwest of the junction between Nevada, Modoc and Lassen counties. Study plots near Susanville. Comment
  CHSC25307  Phacelia adenophora Pauleen Broyles 1977-6-1 154 Lassen Skedaddle Ranch Road at turn-off of South Fork Reservoir road ca 8 cm ne of Herlong. 1660 Comment
  CHSC5259  Phacelia adenophora 1944-6-21 Lassen Eagle Lake shore. 1584 Comment
  JEPS17754  Phacelia adenophora Rimo Bacigalupi with G. T. Robbins 1955-7-21 5429 Lassen along Smoke Creek Ranch rd 8 mi e U.S. Hwy. 395 (se part of valley); Secret Valley 1402 Comment
  JEPS79216  Phacelia adenophora L. R. Heckard with R. C. Bacigalupi 1980-6-11 5264 Lassen along US 395 s Deep Creek crossing (11.3 mi n of Litchfield, flat area and wash between railroad and hwy) 1463 Comment
  UC1088434  Phacelia adenophora Peter H. Raven and Otto T. Solbrig 1958-6-17 13281 Lassen 5.7 mi s Ravendale Comment
  UC1567436  Phacelia adenophora G. Schoolcraft 1989-5-16 1876 Lassen w Hwy 295; Secret Valley 1347 Comment
  POM72872  Phacelia adenophora C. C. Bruce 1898-06 2198 Lassen Madeline Plains. Comment
  POM98589  Phacelia adenophora F. W. Peirson 1926-6-24 6851 Lassen Madeline Plain. 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
  CHSC71089  Phacelia bicolor var. bicolor Vernon H. Oswald; Lowell Ahart 1998-5-22 9132 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
  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
  JEPS94828  Phacelia bicolor var. bicolor Vernon H. Oswald and Lowell Ahart 1998-5-22 9132 Lassen 6 mi ne of Doyle (3.5 mi e of Fort Sage Road, near the summit of the dirt road in the Fort Sage Mountains); Fort Sage Mountains 1737 Comment
  JEPS78146  Phacelia hastata Gary W. Zamzow 1972-7-19 89 Lassen Hwy 139 15 mi s Adin; Willow Creek campground 1524 Comment
  UCD120478  Phacelia hastata John Thomas Howell 1934-7-8 12480 Lassen Champ's Flat. Comment
  JEPS107796  Phacelia hastata subsp. compacta Lowell Ahart, John Dittes 2005-6-2 11950 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction 1498 Comment
  JEPS107806  Phacelia hastata subsp. compacta Lowell Ahart, John Dittes 2005-6-2 11950 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction 1498 Comment
  NY1057241  Phacelia heterophylla N. H. Holmgren 1980-7-4 9503 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 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
  POM203779  Phacelia heterophylla subsp. virgata J. T. Howell 1934-7-10 12553 Lassen Black s Mt. Comment
  JEPS2119  Phacelia humilis Brown and Wieslander 1922-7-18 63 Lassen Martin Sprs. Eagle Lake Comment
  JEPS2120  Phacelia humilis Franklin P. Nutting 1894-7-12 Lassen Pine Creek Comment
  SEINET12765228  Phacelia humilis Vernon H. Oswald, Lowell Ahart 1997-6-24 8620 Lassen South of Susan ville near the small pond on the crest of Diamond Mtn. at a impoundment on Forest Rd. 29N43, ca. 7.4 miles east of Gold Run Rd. (29N10), ca. 2.7 mi east of Lassen NF boundary.; 0 2036 Comment
  RSA201834  Phacelia humilis var. humilis Jack Major 1966-6-24 s.n. Lassen Above Blue Lake, Warner Mountains, Modoc National Forest, northeastern part of the county (ca. 18 miles airline southeast of Likely). 1905 Comment
  RSA337275  Phacelia humilis var. humilis Noel Holmgren, Patricia K. Holmgren 1980-7-4 9511 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale. 2195 Comment
  CHSC58500  Phacelia hydrophylloides Vernon H. Oswald 1992-7-3 5060 Lassen Lassen Volcanic National Park. Trail between Juniper and Horseshoe lakes, on the W side of the ridge between the lakes. 2078 Comment
  RSA112694  Phacelia inundata J. T. Howell 1934-7-8 12510 Lassen Spaldings Resort; Eagle Lake Comment
  UC24433  Phacelia linearis Mrs. R. M. Austin Jun. 1894 Lassen Willow Creek Comment
  RSA428037  Phacelia linearis Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  UCD120559  Phacelia linearis Tracy I. Storer 1961-6-7 s.n. Lassen State Highway 395, 13 miles southeast of Susanville. Comment
  NY1056436  Phacelia lutea var. glandulifera P. A. Munz 1947-5-19 11879 Lassen Highway 395 4 miles south of Madeline Comment
  POM203780  Phacelia ramosissima var. eremophila J. T. Howell 1934-6-10 11873 Lassen Janesville Comment
  UC1567390  Phacelia thermalis G. Schoolcraft 1989-5-3 1868 Lassen s Karlo; North end of Secret Valley 1341 Comment
  UC526141  Phacelia thermalis John Thomas Howell 1934-6-16 12222 Lassen Bieber Comment
  UC710908  Phacelia thermalis C. L. Hitchcock 1940-5-26 6641 Lassen 1 mi w Bieber; floodplain of Pitt River Comment
  UCD88537  Phalaris arundinacea R. Tofsrud 1947-7-20 257 Lassen Near Pittville. Comment
  UC1037092  Phleum pratense Leo Whitney 1933-7-1 2214 Lassen ca 15 mi w Eagle Lake (Crater Mountain); Lassen National Forest, w of Eagle Lake, Crater Mountain 2225 Comment
  UC1567400  Phleum pratense G. Schoolcraft 1989-7-18 1979 Lassen near Bucks Spring (s of Clarks Valley Road); near Buck's Spring 1874 Comment
  CAS-BOT-BC232853  Phlox A. M. Vollmer; L. Beane 1953-7-1 55 Lassen Along Halls Flat road, beginning 6 miles W of Susanville to McArthur 1554 Comment
  CHSC6211  Phlox diffusa J. B. Fredonyer 1946-6-17 Lassen Mt. Fredonyer. 2133 Comment
  UC106950  Phlox diffusa T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  UC972192  Phlox gracilis Milo S. Baker 1952-5-23 12414 Lassen e of Chester (Hwy 36) 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
  CHSC36482  Phlox stansburyi Margaret E. Halloran 1982-6-4 7 Lassen 3 1/2 mi s of jct of 5.17 and 5.16 on 5.17. Comment
  CHSC57489  Phlox stansburyi B. G. Clark 1987-4-15 23 Lassen Rocky knoll 1/4 mi sw of Lassen College adjacent and west of hwy 139. 1297 Comment
  CHSC64803  Phlox stansburyi Vernon H. Oswald 1995-5-31 6802 Lassen Modoc Plateau. Smoke Creek Rance Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  UC106966  Phlox stansburyi T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  RSA38466  Phlox stansburyi P. A. Munz 1947-5-19 11884 Lassen Madeline 1677 Comment
  RSA83065  Phlox stansburyi Verne Grant, Alva Grant 1947-5-5 7979 Lassen North of Honey Lake Valley Comment
  UC1609187  Phoenicaulis cheiranthoides Vernon H. Oswald and Lowell Ahart 1993-5-12 5386 Lassen 1.6 mi se of Pittsville Road (Hwy 44 between Poison Lake and A21 (to Westwood) on n side of road) 1719 Comment
  UCD116141  Phoenicaulis cheiranthoides F. H. Taylor 1932-5-16 s.n. Lassen Mr. Foster's field in Big Valley. Comment
  CDA19731  Phyllodoce breweri J. Chattin August 1947 s.n. Lassen Northern California; Silver Lake. 0 Comment
  CHSC5247  Phyllodoce breweri 1946-7-12 Lassen Silver Lake. 1981 Comment
  CAS-BOT-BC60738  Physaria occidentalis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50655 Lassen Sierra Nevada. Summit ridge of Diamond Mountain. 2346 Comment
  UC74048  Picrothamnus desertorum J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley, Amedee Comment
  UC1609393  Pilularia americana Vernon H. Oswald and Lowell Ahart 1993-7-8 5648 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
  CHSC6220  Pinus contorta subsp. murrayana P. Balch 1955-7-3 Lassen Eagle Lake Resort. 1615 Comment
  RSA518540  Pinus ponderosa George K. Helmkamp 1990-10-4 12 Lassen South of Susanville in Plumas National Forest; north of Milford Pass. 1463 Comment
  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
  CHSC113070  Plagiobothrys cusickii Lowell Ahart; John Dittes 2013-7-22 18870 Lassen Drainage filled with dirt from construction of a pond, 10 yards south of the man made pond, about 140 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS107810  Plagiobothrys cusickii Lowell Ahart, John Dittes 2005-6-2 11954 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction 1425 Comment
  CAS-BOT-BC224975  Plagiobothrys hispidulus John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50648 Lassen S and SE of Diamond Mountain 2286 Comment
  CHSC112430  Plagiobothrys hispidulus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18730 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
  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
  JEPS121293  Plagiobothrys hispidulus Lowell Ahart 2013-7-22 18854 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
  CAS-BOT-BC228462  Plagiobothrys mollis G. Schoolcraft 1986-7-28 1665 Lassen Along edge of Moll Res. W of Ash Valley 1606 Comment
  UC1191065  Plagiobothrys mollis Robert Ornduff 1959-7-18 5060 Lassen 1 mi e Madeline (on road from Madeline to the Patterson Ranger Station); Modoc National Forest Comment
  UC1523740  Plagiobothrys mollis Gary Schoolcraft 1981-8-11 559 Lassen Silva Flat Reservoir 1706 Comment
  RSA128304  Plagiobothrys mollis P. H. Raven, Otto T. Solbrig 1958-6-17 13258 Lassen Along U.S. Hwy 395, 7.1 miles W of Standish. Comment
  CHSC110912  Plagiobothrys mollis var. mollis Lowell Ahart; John Dittes 2012-7-9 18283 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
  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
  RSA0105588  Plagiobothrys stipitatus var. micranthus Lowell Ahart, John Dittes 2013-7-22 18873 Lassen 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1567370  Plagiobothrys stipitatus var. micranthus G. Schoolcraft 1989-7-24 1991 Lassen Said Valley Reservoir Said Valley 1630 Comment
  POM89198  Plagiobothrys tenellus Milo S. Baker 1890-1 s.n. Lassen Milford. Comment
  JEPS124568 Image available Plagiobothrys tener Dixie Funnell 1965-7-13 144 Lassen 4.2 miles west of Dead Horse Summit. HW 89. Comment
  CAS-BOT-BC189615  Plagiobothrys torreyi Clare B. Hardham 1961-6-17 7509 Lassen Baxter Creek S of Susanville 1676 Comment
  CHSC12416  Platanthera Anne Linda Brisk 1969-6-26 23 Lassen 7.2 mi SW of ELBS. 1584 Comment
  HSC95284  Platanthera dilatata var. leucostachys Gordon Leppig 1998-7-12 941 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC16618  Platanthera dilatata var. leucostachys Jim Vaughn 1956-7-13 Lassen Drakesbad, Mt. Lassen Natl. Park 1738 Comment
  JEPS64411  Platanthera leucostachys Brown and Wieslander 1922-7-17 21 Lassen Martin Sprs. Eagle Lake Comment
  JEPS26653  Plectritis macrocera Lauramay T. Dempster 1961-6-17 1668 Lassen about 4 mi sw of junction w Richmond Road (s of Susanville, Gold Run Creek); Gold Run Creek Comment
  SEINET8658736  Plectritis macrocera C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  CAS-BOT-BC326718  Pleiacanthus spinosus John Thomas Howell 1974-7-8 50493 Lassen Between Camp Connell and Camp Menzies, Sierra Nevada 1295 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
  JEPS36547  Pleiacanthus spinosus W. L. Jepson 1918-8-2 7790 Lassen Long Valley 1371 Comment
  CHSC7691  Poa Beverley J. Wise 1969-6-4 124 Lassen 10 mi. east of Susanville (Janesville), cut in hill next to cemetery. 1310 Comment
  SEINET10565425  Poa David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17785 Lassen 6 mi N of Hallelujah Jct on US Hwy 395, in Artemesia tridentata, Pinyon pine, Jeffery Pine along high ridge & in sandy wash. 1402 Comment
  CAS-BOT-BC255679  Poa bolanderi Clare B. Hardham 1971-8-22 18912 Lassen Diamond Mountain 2133 Comment
  CAS-BOT-BC254943  Poa bulbosa Clarence R. Quick 1962-6-17 62 -29 Lassen On Western Pacific RR, S of Halls Flat on Susanville-Pittville road at Blacks Mountain Experimental Forest Headquarters 1706 Comment
  UC1024877  Poa compressa Leo Whitney 1935-5-26 3147 Lassen 10 mi e Adin (Ash Creek) Comment
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Jun 24 2009
  UCD90918  Poa cusickii Leo Whitney 1935-6-10 3214 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  UCR119183  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen Warner Mountains, 6 miles southeast of Jess Valley, 3 miles east of Blue Lake. Southern edge of mountains. 2134 Comment
  JEPS70635  Poa cusickii subsp. cusickii G. S. Crew and C. S. Robinson 1927-7-15 61 Lassen sw Lassen Co. Clover Valley; Lassen Forest 1767 Comment
  UC1024840  Poa cusickii subsp. cusickii Leo Whitney 1935-6-10 3214 Lassen Camp 10 Fruit Grower's Supply Company Comment
  SEINET10524396  Poa fendleriana Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 883 Lassen Collected 3 mi N of Milford, Calif. on Hwy 395 at Honey Lake campgrounds. Comment
  HSC95195  Poa leptocoma subsp. leptocoma Gordon Leppig, J. Cromwell 1997-7-27 629 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  RSA129249  Poa palustris H. S. Yates 1936-8-12 6079 Lassen McKenzie Meadows 1524 Comment
  CAS-BOT-BC247319  Poa pratensis Louella Bass 1973-5-29 EU 67 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC247320  Poa pratensis Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16337 -A Lassen 13.5 mi. E. of Susanville Comment
  CAS-BOT-BC255021  Poa secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49521 Lassen Elysian Valley, W of Janesville 1325 Comment
  JEPS127715  Poa secunda Alejandro Brambila, Michael Dolan 2016-7-25 CA 320 -170 Lassen Clarks Valley Road west off 395 right after Likely Mtn. About 1Mile before Christensen Corral Comment
  POM203054  Poa secunda J. T. Howell 1934-7-6 12459 Lassen Harvey Valley Comment
  RSA647529  Poa secunda Marion P. Harthill 1972-6-17 821 Lassen Madeline. 1677 Comment
  UCR266833  Poa secunda G. B. Stabler 1922-7-9 s.n. Lassen Constantia [former settlement, in Long Valley 45 miles (72 km) southeast of Susanville] 1372 Comment
  CAS-BOT-BC247052  Poa secunda subsp. juncifolia Ralph K. Gierisch 1968-7-11 3352 Lassen Lassen National Forest, Harvey Valley - Dixie Spr. 1706 Comment
  CHSC115514  Poa secunda subsp. juncifolia Lowell Ahart; John Dittes 2015-7-14 20331 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
  UC1142966  Poa secunda subsp. juncifolia A. L. Hormay 1941-6-23 18 Lassen Burgess Spring; Lassen Nat'l Forest 1676 Comment
  UCD92165  Poa secunda subsp. juncifolia Beecher Crampton 1954-7-5 2048 Lassen 4.5 miles W of Susanville, along Hwy 36. 1432 Comment
  UCD92393  Poa secunda subsp. juncifolia C. C. Rowland 1944-7-11 s.n. Lassen Doyle. Comment
  UCD92428  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-26 3370 Lassen Lassen National Forest. Near Fruit Grower's Supply Co., Camp 10. Comment
  CAS-BOT-BC251088  Poa secunda subsp. juncifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49189 Lassen Elysian Valley northwest of Janesville 1325 Comment
  SEINET7294025 Image available Poa secunda subsp. juncifolia Leo Whitney 1935-1 3259 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  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
  UC1132883  Poa secunda subsp. secunda A. Simontacchi 1940-5-13 697 Lassen 4.6 mi sw of B. M. 7310 on Blacks Mt; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UC1136989  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 219 Lassen 1 1/2 mi e Hall's Flat Ranger Station; Lassen Nat'l Forest 1722 Comment
  UC1136990  Poa secunda subsp. secunda George A. Fischer and Irwin H. Johnson 1933-7-12 F 206 Lassen Grass Valley; Lassen Nat'l Forest 1699 Comment
  HSC68792  Poa wheeleri Gary Schoolcraft 1979-7-3 112 Lassen 4.3 mi. up Observational Lookout Rd. from Horne Ranch Rd. 2134 Comment
  UC1143038  Poa wheeleri L. R. Short 1936-4-30 S- 341 Lassen Burgess Spring Experimental Range; Lassen Nat'l Forest 1859 Comment
  CHSC112409  Polemonium micranthum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18743 Lassen Drainage filled with dirt from construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC67263  Polemonium micranthum James D. Jokerst 1991-5-29 3312 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 drainage. 1584 Comment
  CHSC96705  Polemonium occidentale Gordon Leppig 1998-7-12 949 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  UC449772  Polemonium occidentale Franklin P. Nutting 1894-7-28 Lassen Bridge Creek Bridge Creek (Northern California) Comment
  CAS-BOT-BC167847  Polygala subspinosa T. Wendt; E. Lott 1975-6-12 1031 Lassen 4.5 mi. E of Rte 395 on Smoke Creek Ranch Road, E. of Mud Flat 1371 Comment
  JEPS28700  Polygonum amphibium var. stipulaceum George W. Gillett 1957-7-26 921 Lassen Butte Lake Lassen Volcanic National Park (in shallows near campground area) 1844 Comment
  CDA2771  Polygonum arenastrum T. C. Fuller 1959-7-7 4731 Lassen Lee Wheeler property, 3 miles south of Susanville. 0 Comment
  CAS-BOT-BC419766  Polygonum argyrocoleon Ernest C. Twisselmann 1961-9-21 6570 Lassen Harvey Valley Road, ca. 14 miles south of Pittville 1219 Comment
  CAS-BOT-BC413910  Polygonum aviculare James Jokerst 1983-7-24 1877 Lassen Near Madeline Plains 1614 Comment
  CHSC99299  Polygonum aviculare Lowell Ahart; John Dittes 2008-6-20 14931 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
  CHSC112447  Polygonum aviculare subsp. depressum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18735 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CAS-BOT-BC414305  Polygonum aviculare subsp. neglectum M. S. Taylor 1982-8-19 5021 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallalujah [Hallelujah] Junction 1493 Comment
  UC725581  Polygonum bistortoides A. A. Heller 1938-6-4 15141 Lassen 2 mi w Westwood Comment
  CAS-BOT-BC414487  Polygonum douglasii G. Schoolcraft 1989-6-19 1918 Lassen Ash Valley RNA/ACEC Comment
  RSA104503  Polygonum douglasii Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 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
  UC1567376  Polygonum douglasii subsp. douglasii G. Schoolcraft 1989-6-19 1918 Lassen Ash Valley RNA/ACEC 1554 Comment
  UC570303  Polygonum douglasii subsp. douglasii E. Sawyer 1935-6-27 215 Lassen Long Valley Sierraville Quadrangle 1310 Comment
  CHSC105243  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  JEPS104432  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, ca 1/4 mile southwest of the Susan River, ca 8 miles (air) southwest of Susanville. 1433 Comment
  JEPS46148  Polygonum douglasii subsp. spergulariiforme Duncan Dunning 1921-8-11 Lassen 3 mi s Antelope Mountain (sw of Eagle Lake); Martin Spring Comment
  JEPS51271  Polygonum douglasii subsp. spergulariiforme Brown and Wieslander 1922-7-20 88 Lassen Martin Sprs. Eagle Lake Comment
  UC773926  Polygonum douglasii subsp. spergulariiforme L. R. Short 1936-9-30 S- 501 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1767 Comment
  CAS-BOT-BC418534  Polygonum minimum George W. Gillett 1957-7-28 931 Lassen Lassen Volcanic National Park. One mile above Butte Lake, on Widow Lake Trail 1905 Comment
  CHSC112396  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18732 Lassen Drainage filled with dirt form construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC58506  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald 1992-7-3 5049 Lassen Lassen Volcanic National Park. Trail from Juniper L. to Snag L., ca. 0.1 mi N of Cameron Meadow. 1950 Comment
  CHSC66256  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald; Lowell Ahart 1996-6-24 7856 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Locally abundant near a ditch on the W side of the meadow ca. 0.3 mi S of the cabins. 1633 Comment
  JEPS120876  Polygonum polygaloides subsp. confertiflorum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18732 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS121265  Polygonum polygaloides subsp. confertiflorum Lowell Ahart, John Dittes 2013-7-23 18905 Lassen On the NW side of a man-made pond, about 160 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  POM312907  Polygonum polygaloides subsp. confertiflorum S. Galen Smith, H. L. Mason, Malcom A. Nobs 1949-5-29 757 Lassen Marsh, on Great Northern Railroad, Hwy 299, Nubeiber Comment
  UC1191311  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason Jul 29 1955-Jul 31 1955 14639 Lassen Pine Creek Flat Comment
  UC1520661  Polygonum polygaloides subsp. confertiflorum Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9466 Lassen along US 395 5.6 km (3.5 mi) s Madeline; Madeline Plains 1620 Comment
  JEPS87371  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald and Lowell Ahart 1993-8-3 5749 Lassen e Silver Lake (just e of Caribou Wilderness, ca 13 air mi n of Lake Almanor, e side of swamp); Cooper Swamp 1932 Comment
  POM203797  Polygonum sawatchense J. T. Howell 1934-7-9 12528 Lassen Harvey Valley. Comment
  UC506934  Polygonum sawatchense subsp. oblivium George A. Fischer and Irwin H. Johnson 1938-7-14 F 248 Lassen Lassen National Forest 1767 Comment
  HSC97193  Polygonum spergulariiforme L. Ahart 2003-8-17 10515 Lassen E side of Hwy. 36, 1/4 mi. SW of the Susan River, 8 air mi. SW of Susanville 1434 Comment
  RSA122848  Polygonum spergulariiforme L. R. Short 1936-9-30 s 501 Lassen Burgess Spring, Exp Range. 1768 Comment
  UCD100686  Polygonum spergulariiforme J. M. Tucker 1950-7-25 1976 Lassen 33 miles northwest of Susanville, on road from Pittville. Comment
  UCD91225  Polypogon monspeliensis A. A. Beetle 1941-6-28 2814 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  CHSC52131  Populus fremontii Detzer; Sacks 1977-7-1 3 Lassen Ca. 3 mi se Milford, .5 mi se of Laufman Ranger Station on unimproved USFS road. 1481 Comment
  CHSC13799  Populus tremuloides Cathy Crittenden 1970-7-9 41 Lassen Antelope lookout. 2316 Comment
  JEPS96122  Porterella carnosula Vernon H. Oswald and Lowell Ahart 1996-6-24 7854 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi e of Eagle Lake Rd (A1), w side Papoose Meadows, ca 0.3 mi s of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC130334  Porterella carnosula M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake; near Eagle Lake 1524 Comment
  OBI75891  Porterella carnosula Anthony Baniaga and D. Lepley, D. Lepley 2011-8-17 502 Lassen Lassen Natl Forest. Unnamed ephemeral pool, E of Silver Bowl Camp. Bogard Buttes quad. T31N R7E sec 35 SW of SE 1905 Comment
  SEINET10460760  Porterella carnosula Eggleston 1927-7-11 EGGLESTON 21476 Lassen Bogard Ranger Station, Lassen Forest 1500 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
  UCD138219  Potamogeton amplifolius Gordon Leppig 1998-8-18 1064 Lassen Modoc National Forest; Blue Lake. Lake shore south of camp ground. 1859 Comment
  UCR228122  Potamogeton diversifolius R. F. Thorne, Larry E. DeBuhr 1975-8-22 47201 Lassen Modoc Plateau, Hwy 395, c. 5 mi north of Madeline [at Smith Reservoir] and c. 5.5 mi south of Modoc Co. line 1616 Comment
  UC1099866  Potamogeton foliosus Verne Grant, Irving Schneider 1947-7-29 8181 Lassen 1 mi e (upstream) of Tule Lake; Cedar Creek Comment
  UCR196279  Potamogeton foliosus Daniel B. Marcum 2007-7-25 s.n. Lassen 6 mi south of Bieber in Big Valley. Robin Harbert's wild rice field 1280 Comment
  UCD149958  Potamogeton foliosus William Anderson 1963-5-12 s.n. Lassen High Rock. Comment
  CAS-BOT-BC454029  Potamogeton pusillus subsp. 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 1698 Comment
  RSA233761  Potamogeton richardsonii Robert F. Thorne, C. W. Tilforth 1969-9-5 39140 Lassen Said Valley Reservoir. Comment
  CAS-BOT-BC540031  Potentilla biennis Verne Grant; Irving Schneider 1947-7-30 8189 Lassen South point of west embayment, Tule Lake Comment
  CDA26098  Potentilla glandulosa T. C. Fuller 1963-7-15 10903 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  RSA123323  Potentilla glandulosa L. R. Short 1936-6-10 s- 425 Lassen [Unspecified] 1854 Comment
  CHSC67064  Potentilla gracilis Willis Ball 1969-6-26 42 Lassen Found in Papoose Meadows. 1584 Comment
  JEPS107940  Potentilla gracilis var. elmeri Lowell Ahart, John Dittes 2005-6-1 11854 Lassen Long Valley, on the west side of the poor dirt road, about 1/2 mile west of Scott Road, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  CHSC6256  Potentilla gracilis var. fastigiata V. Holt 1946-6-30 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  CAS-BOT-BC540362  Potentilla gracilis var. fastigiata John Thomas Howell 1934-7-6 12440 Lassen Harvey Valley 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
  CAS-BOT-BC158516  Potentilla millefolia 1927-6-10 7 Lassen Lassen National Forest, Norval Flat 1747 Comment
  CHSC75533  Poteridium annuum Vernon H. Oswald; Lowell Ahart 1999-6-9 9760 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass. Roadside. 1645 Comment
  SD149134  Prunella vulgaris var. lanceolata John Thomas Howell, Gardon H. True and Margaret Williams 1973-6-28 49443 Lassen Elysian Valley, west of Janesville. 1326 Comment
  CAS-BOT-BC159776  Prunus andersonii Ella Dales Cantelow 1938-10-23 2192 Lassen N. of Doyle, Honey Lake in view Comment
  SEINET10542397  Prunus andersonii Paul Gallian, David B. Dunn 1971-6-2 Gallian 486 Lassen 5 miles s of milford near honey lake on us hwy 395. Along roadside in grass, Artemesia tridentata assoc. Quercus, jeffrey pine on mountain range to w at ca The same altitude 1250 Comment
  SEINET10542398  Prunus andersonii Paul Gallian, David B. Dunn 1971-6-2 Gallian 461 Lassen 6 miles n of hallelujah junction on us hwy 395, in artemisa tridentata, pinyon Pine, jeffrey pine along high ridge and in sandy wash 1402 Comment
  CAS-BOT-BC239803  Pseudoroegneria spicata Doris Kildale Gillespie 1930-5-12 9328 Lassen 2 miles north of Susanville on road to Alturas Comment
  UCD55293  Pseudoroegneria spicata Ellen Dean; Gary Schoolcraft 2006-5-16 3114 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
  CHSC67079  Pseudostellaria jamesiana Jeanne Boze 1981-6-13 116 Lassen On northeast slope of Galletin Peak. 1981 Comment
  CAS-BOT-BC174802  Pseudostellaria jamesiana Mrs. H. C. Cantelow 1949-6-11 7 Lassen Summit of Fredonyer Pass Comment
  CHSC27600  Psilocarphus brevissimus var. brevissimus J. D. Prouty 1978-6-28 4 Lassen Lower Dry Lakes, SE of Eagle L. Comment
  UC35755  Psilocarphus brevissimus var. brevissimus J. Burtt Davy Jun 17 1897-Jun 24 1897 3381 Lassen Honey Lake Valley Comment
  JEPS124658 Image available Psilocarphus brevissimus var. brevissimus M. L. Wheelis 1964-7-1 132 Lassen Highway 139, 12 mi. north of Susanville. Comment
  CAS-BOT-BC328200  Psilocarphus elatior Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee 1219 Comment
  POM40287  Psilocarphus elatior Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  JEPS109942  Psoralidium lanceolatum Dean W. Taylor 2004-5-11 19063 Lassen Calneva Lake; southern end of the lakebed. 1219 Comment
  UCD91531  Puccinellia distans Beecher Crampton 1964-6-27 7098 Lassen Lassen County, ca. 8 miles S.E. of Ravendale, BLM Spanish Springs -- Shinn Mtns. Resource Conservation area. 1981 Comment
  CAS-BOT-BC239824  Puccinellia lemmonii James Jokerst 1983-7-24 1884 Lassen Near Madeline Plains 1614 Comment
  JEPS114875  Puccinellia lemmonii Lowell Ahart, John Dittes 2008-6-20 14967 Lassen Saline area, about 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA0036998  Puccinellia lemmonii Lowell A. Ahart, John Dittes 2008-6-20 14967 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  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
  SEINET3394464  Purshia tridentata E. D. McArthur 1982-1 EDM- 1356 Lassen NW of Janesville at Jct of crossroads 205 & 219 Comment
  SEINET7463175  Purshia tridentata F. B. Headley 1905-5-28 s.n. Lassen Honey Lake. 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
  UC412673  Pyrola picta Franklin P. Nutting Jul 1928 Lassen Mts. S of Eagle Lake Comment
  UCD135326  Pyrrocoma hirta Ratliff 1966-7-5 4 Lassen Harvey Valley Allot. - Plot 71. Comment
  UC1037291  Pyrrocoma hirta var. lanulosa Leo Whitney 1934-7-10 1671 Lassen ca 14 mi w Eagle Lake (dry meadow near Harvey Valley Spring); Lassen National forest, Harvey Valley 1737 Comment
  UC35843  Pyrrocoma hirta var. lanulosa M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake Comment
  CHSC52666  Pyrrocoma lanceolata var. lanceolata James Jokerst 1983-7-24 1881 Lassen Near Madeline Plains. 1614 Comment
  JEPS25905  Pyrrocoma lanceolata var. lanceolata John H. Weiler, L Constance, and E. Molseed 1960-6-13 60162 Lassen along US Hwy 395 10.9 mi ne Litchfield 1219 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
  JEPS100334  Pyrrocoma lucida Dean W. Taylor 2001-7-19 17839 Lassen meadow along jeep road southward from Doyle Grade and 1 air mile South therefrom, just E of Plumas County line, Plumas National Forest 2042 Comment
  CDA18269  Pyrrocoma racemosa var. paniculata G. D. Barbe 1974-8-2 1934 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UC1192231  Pyrrocoma racemosa var. paniculata Verne Grant and Irving Schneider 1947-9-6 8392 Lassen near Wendel (w of Fleming Rach Headquarters) Comment
  UC296045  Pyrrocoma racemosa var. paniculata H. M. Hall 1925-8-31 12214 Lassen Amedee Honey Lake Valley 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
  UC735118  Quercus kelloggii Lincoln Constance 1946-7-3 3096 Lassen 2 mi nw Milford (near Honey Lake) 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
  CHSC25909  Ranunculus K. R. Stern 1967-6-25 2434 Lassen Meadow on road to Eagle Lake Biological Station, ca. 7 mi. S of Eagle Lake. 1828 Comment
  CHSC7774  Ranunculus Beverley J. Wise 1969-5-18 147 Lassen Gallatin Creek, 1/4 to 1/2 mi. upstream (south) from Eagle Lake. 1554 Comment
  UC1126215  Ranunculus alismifolius var. alismifolius A. Simontacchi 1940-5-13 705 Lassen 6.4 mi nw Harvey Valley Ranger Station; Lassen National Forest, Halls Flat Quadrangle Comment
  CHSC8742  Ranunculus aquatilis var. capillaceus S. Chulasmai 1966-5-13 34 Lassen Vernal pool, (Johnstonville). Comment
  CHSC8743  Ranunculus aquatilis var. capillaceus S. Chulasmai 1966-5-13 35 Lassen Vernal pool, (Johnstonville). Comment
  SEINET10899319  Ranunculus aquatilis var. capillaceus Mary Susan Taylor 1982-6-12 Taylor 4648 Lassen T29N R10E ne/nw sec 13. Westwood quad. Aquatic in still pond on n side of West Fork of Susan River, s side of Hwy 36 at jct w/ Willow Cr Rd, 8 mi w Susanville. Comment
  CHSC110303  Ranunculus aquatilis var. diffusus L. P. Janeway; B. Castro 2012-7-2 10932 Lassen Modoc Plateau. East side of Skedaddle Mountains; large meadows along Skedaddle Creek, just upstream from 'Skedaddle Ranch. 1600 Comment
  CHSC112752  Ranunculus aquatilis var. diffusus Lowell Ahart; John Dittes 2013-7-23 18891 Lassen Margins of a man made pond, about 150 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS121299  Ranunculus aquatilis var. diffusus Lowell Ahart, John Dittes 2013-7-23 18891 Lassen Margins of a man-made pond, about 150 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  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
  NY493018  Ranunculus aquatilis var. diffusus P. H. Raven 1958-6-19 13256 Lassen In a pond along United States Highway 395, 7.1 miles west of Standish Comment
  CHSC6246  Ranunculus canus W. Vinyard 1946-6-13 Lassen Pine Creek, Eagle Lake. 60 Comment
  CHSC4872  Ranunculus cymbalaria R. Carter 1967-6-23 548 Lassen In meadow, upper Murrer's Meadow. Comment
  HSC103655  Ranunculus flammula Thomas W. Nelson, Jane Nelson 1985-8-10 8026 Lassen Silver Lake, along north side of arm on east side of lake. 1829 Comment
  CHSC7184  Ranunculus glaberrimus var. ellipticus Lynn R. Thomas 1969-4-17 100 Lassen Ca. 100 yds. w of Rice Canyon Rd., down hillside and just across small creek; 5 mi n of junction with 'Back road to Litchfield;' ca. 12 mi e of Susanville. 1310 Comment
  UC1951076  Ranunculus glaberrimus var. glaberrimus Debra Valov 2009-4-25 2009015 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  JEPS123841  Ranunculus macounii Lowell Ahart, John Dittes 2015-7-14 20328 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  UC118171  Ranunculus occidentalis T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  UCD96933  Ranunculus occidentalis Jack Major 1966-6-24 s.n. Lassen above Blue Lake, Warner Mountains, Modoc National Forest, northeastern Lassen County (ca. 18 miles airline southeast of Likely). 1905 Comment
  NY494767  Ranunculus occidentalis var. dissectus H. D. D. Ripley 1943-6-13 5682 Lassen Near Milford 1264.9 Comment
  NY494769  Ranunculus occidentalis var. ultramontanus W. W. Eggleston 1911-5-29 6759 Lassen Vicinity of Doyle Station 1290 Comment
  SBBG28521  Ranunculus occidentalis var. ultramontanus M. S. Baker 1952-5-23 Lassen Hwy 36, between Chester and Fredonyer Pass 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
  SEINET5338927  Ranunculus uncinatus var. uncinatus M. J. Williams 1984-6-16 84- 32 -1 Lassen Road from Doyle to Frenchman's Reservoir, 0.9 miles towards Frenchman's, 8.6 miles from Doyle. Comment
  CHSC44887  Ratibida columnifera Lowell Ahart; John Thomas Howell 1974-7-9 513 Lassen Near the south-west side of Eagle Lake. 1584 Comment
  UC1364997  Ratibida columnifera Nick Santamaria 1969-7-21 721 Lassen on service road #33NO1 two mi n Eagle Lake Resort (w side of lake); Eagle Lake Comment
  CDA7609  Ratibida columnifera G. D. Barbe 1974-8-2 1939 Lassen At the north end of the Glenn-Eagle airstrip, southwest corner of Eagle Lake, 0.8 mile north of Eagle Lake Resort. 0 Comment
  UC1587100  Rhaponticum repens G. Schoolcraft 1991-7-31 2203 Lassen just n of Hall Spring; Shinn Mts. 1706 Comment
  CHSC12476  Ribes cereum Carol Weld 1969-6-19 2 Lassen Juniper sagebrush ca 150 yds. N. of Eagle Lake Field Station. 1554 Comment
  CHSC6263  Ribes cereum W. Vinyard 1946-6-17 Lassen Eagle Lake. Mt. Fredonyer summit. 2421 Comment
  CHSC67058  Ribes cereum Willis Ball 1969-6-19 8 Lassen Found approx. 100 yds. N.E. of E.L.B.S. 1615 Comment
  NY455007  Ribes cereum B. M. Bartholomew 1988-7-22 4503 Lassen Mosquito Creek, ca. 2 km. southwest of Patterson Meadow, southern end of the Warner Mountain 2080 Comment
  UC1136910  Ribes cereum L. R. Short and Wm. Gansberg 1936-6-16 S- 439 Lassen Burgess Spr. Exp. Range Lassen Forest 1880 Comment
  UCR17254  Ribes cereum Frank C. Vasek 1975-7-11 750711- 18 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CHSC84861  Ribes cereum var. cereum L. P. Janeway; B. Castro 2003-10-5 8003 Lassen High Cascade Range. 3.6 km (air) southwest of Bogard Buttes; along Lassen National Forest road 32N09C 0.5 km north of road 32N09. 2020 Comment
  CHSC86948  Ribes cereum var. cereum L. P. Janeway 2001-6-19 7188 Lassen High Cascade Range. Southeast edge of Long Lake (which is dry) at west end of Long Valley; 6.4 km north-northwest of Harvey Mountain. 1640 Comment
  NY455349  Ribes nevadense A. A. Heller 1938-6-4 15145 Lassen 1 miles east of Fredonyer Pass 1706.9 Comment
  UC747328  Ribes roezlii G. Thomas Robbins 1945-10-6 2150 Lassen near sw summit Crater Lake Mountain; Lassen National Forest 2194 Comment
  UC585163  Ribes velutinum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1738 Lassen gully on mountain above Red Rock 1420 Comment
  CHSC117224  Rigiopappus leptocladus Lowell Ahart; John Dittes 2016-6-7 20976 Lassen 20 yards west of the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS117586  Rigiopappus leptocladus Lowell Ahart, John Dittes 2010-7-31 16980 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
  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
  UC1126739  Rorippa curvisiliqua A. Simontacchi 1940-6-4 806 Lassen 14.8 mi w Harvey Mountain Lookout; Halls Flat Quad., Lassen National Forest Comment
  CHSC113059  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2013-7-22 18855 Lassen Drainage filled with dirt from construction of a pond, about 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99504  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2008-6-20 14937 Lassen On the edge of Big Valley Canal and in vernal pools, about 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC25060  Rorippa nasturtium-aquaticum L. B. Barlow 1967-6-24 40 Lassen Meadow 4 mi. east of Eagle Lake Biological Station at Murrer's Upper Meadow. 1524 Comment
  JEPS127167  Rorippa palustris subsp. palustris Lowell Ahart, John Dittes 2016-7-15 21218 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC5241  Rorippa palustris var. occidentalis V. Holt 1945-6-5 Lassen Aspen Grove, Eagle Lake. 1584 Comment
  UC1191531  Rorippa sinuata Verne Grant and Irving Schneider 1947-8-1 8226 Lassen irrigation ditch running s.w. into State Fish & Game nesting area on s.w. end of Section 19 Madeline Plain Comment
  CHSC61590  Rosa woodsii subsp. ultramontana Arthur C. Barrett 1915-8-18 33 Lassen Plumas Forest. Laufman Ranger Station. 1463 Comment
  CHSC6260  Rosa woodsii subsp. ultramontana W. Vinyard 1946-6-10 Lassen Pelican Point, Eagle Lake. 1584 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
  JEPS114901  Rosa woodsii var. ultramontana Lowell Ahart, John Dittes 2008-6-20 14972 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS45632  Rosa woodsii var. ultramontana Brown and Wieslander 1928-6-16 Lassen Eagle Lake 1584 Comment
  JEPS45635  Rosa woodsii var. ultramontana W. L. Jepson 1918-8-2 7782 Lassen 1 mi below Boni Ranch (lower bench of creek); Long Valley Creek 1371 Comment
  CHSC23481  Rubus leucodermis Wayne O. Baum 1971-7-5 71 -84 Lassen E. slope of Gallatin Peak. 2072 Comment
  CAS-BOT-BC147172  Rubus parviflorus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49479 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC68870  Rubus parviflorus Vernon Oswald; Lowell Ahart 1997-6-24 8614 Lassen South of Susanville on the north side of Diamond Mtn. along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. 1889 Comment
  HSC19712  Rubus parviflorus M. S. Baker 1890-1 Lassen Milford Comment
  JEPS28496  Rubus parviflorus George W. Gillett 1957-7-26 912 Lassen Butte Lake Lassen Volcanic National Park, Butte Lake 1844 Comment
  CAS-BOT-BC421953  Rumex acetosella Paul Gallian; B. J. Cox 1971-6-2 482 Lassen 5 miles South of Milford near Honey Lake on U.S. Hwy. 395 1249 Comment
  SEINET10479396  Rumex acetosella Paul Gallian, David B. Dunn 1971-6-2 Gallian 482 Lassen 5 mi S of Milford near Honey Lake on US Hwy 395; along roadside in grass-Artemesia tridentata assoc.; Quercus-Jeffrey Pine on mountain range to W at approximately the same altitude. 1250 Comment
  UC1191289  Rumex crispus Malcolm A. Nobs and S. Galen Smith 1949-8-20 1481 Lassen 1 mi n Doyle; Long Creek Comment
  CHSC66865  Rumex fueginus Vernon H. Oswald; Lowell Ahart 1996-9-10 8283 Lassen Mountain Meadows Reservoir SW of Westwood. Uncommon on the embankment of the railroad along the northwest edge of the reservoir. 1539 Comment
  NY324109  Rumex lacustris M. S. Baker 1894-1 s.n. Lassen Silver Lake [according to annotation by Rech. f.] Comment
  CAS-BOT-BC109329  Rumex paucifolius G. Schoolcraft 1987-4-29 1689 Lassen Ash Valley RNA. 1554 Comment
  CHSC101061  Rumex paucifolius John Dittes 2008-5-22 1530 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.5 air miles east of Hayden Hill, ca 700 feet east of intersection of Hwy 139 and FS Road 36N02; alluvial terrace of Willow Creek. 482 Comment
  UC452567  Rumex paucifolius Franklin P. Nutting Lassen Big Valley Comment
  CAS-BOT-BC433860  Rumex salicifolius B. Bartholomew; B. Anderson 1988-7-22 4497 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountain. 2080 Comment
  CHSC58852  Rumex salicifolius var. triangulivalvis Vernon H. Oswald; Lowell Ahart 1992-7-16 5123 Lassen Swamp 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. Common on drier parts of a marshy meadow. 1719 Comment
  CDA23213  Rumex salicifolius var. triangulivalvis T. C. Fuller 1959-7-7 Lassen Highway 395, 11 miles south of Ravendale. 0 Comment
  JEPS121294  Rumex triangulivalvis Lowell Ahart, John Dittes 2013-7-22 18867 Lassen 30 yards S of the man-made pond, about 120 yards E of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CAS-BOT-BC434261  Rumex triangulivalvis John Thomas Howell 1975-7-23 51404 Lassen Along Hwy. 395 between Johnstonville and Janesville 1280 Comment
  CAS-BOT-BC109417  Rumex venosus P. B. Kennedy 1901-6-10 s.n. Lassen Railroad Station, Constantia. Comment
  RSA249402  Rumex venosus Thomas W. Nelson, S. Dowty 1971-7-22 19300 Lassen Along Hwy 395, about 4 miles east of Standish Comment
  SEINET4176402  Rumex venosus N. J. Hartke 1953-5-18 29 Lassen 2 miles north of Halleluja, Calif. Comment
  CHSC27591  Sagittaria cuneata J. D. Prouty 1978-7-23 24 Lassen Upper Murrers Meadow, SE of Eagle L. 1545 Comment
  UC533  Sagittaria cuneata J. Burtt Davy Jun 17 1897-Jun 24 1897 3338 Lassen sloughs Susan River (Honey Lake Valley); , sloughs of Susan River 1219 Comment
  UC803885  Sagittaria cuneata G. L. Stebbins Jr. 1949-8-6 4004 Lassen edge Feather Lake (betw. Susanville and McArthur); edge of Feather Lake 1676 Comment
  CHSC96714  Salix eastwoodiae Gordon Leppig; J. Cromwell 1997-7-27 608 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  HSC95346  Salix eastwoodiae Gordon Leppig, J. Cromwell 1997-7-27 608 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  JEPS114626  Salix exigua Lowell Ahart, John Dittes 2008-6-22 15043 Lassen On the bottom of a deep ditch, on the south side of the road levee, open meadow area, in Big Valley, about 2.4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.4 miles (air) northeast of Bieber 1257 Comment
  CAS-BOT-BC128172  Salix lasiandra var. lasiandra John Thomas Howell 1976-7-20 52018 Lassen Bottom flats along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass - Sierra Nevada 1432 Comment
  CAS-BOT-BC124560  Salix lemmonii Mrs. H. P. Bracelin 1934-6-14 822 Lassen Upper Silver Creek, near Silver Lake (Lost Lake), Warner Mountains 2316 Comment
  CHSC66405  Salix scouleriana Vernon H. Oswald; Lowell Ahart 1996-6-17 7770 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Ca. 2 mi E of the 7 mile post. 1432 Comment
  JEPS95904  Salsola tragus Lowell Ahart and Vernon H. Oswald 1999-9-13 8205 Lassen on the east side of the dirt road and 1/2 mile south of the sign in station; Honey Lake Wildlife Area; 4 1/2 miles (air) southeast of Standish 1207 Comment
  CHSC68752  Salvia aethiopis Vernon H. Oswald; Lowell Ahart 1997-5-27 8482 Lassen West side of Hwy. 139 at Lassen Community College just north of Susanville. 1310 Comment
  CDA36802  Salvia aethiopis D. B. Joley 1976-6-16 1 Lassen Hwy. 139, ca. 3 miles north of Susanville. 0 Comment
  UCD125448  Salvia aethiopis J. M. Tucker 1950-7-26 1979 Lassen outskirts of Susanville, on east side of town. Comment
  CHSC64790  Salvia dorrii var. dorrii Vernon H. Oswald 1995-5-24 6757 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. 1280 Comment
  CHSC12487  Sambucus mexicana Carol Weld 1969-6-26 45 Lassen 7.8 miles SW of Eagle Lake Field Station. 1584 Comment
  UCD137207  Sambucus nigra subsp. caerulea P. B. Schultz 1967-7-12 78 Lassen 14 miles southeast of Adin on State Highway 139. 1524 Comment
  JEPS94542  Sambucus racemosa var. microbotrys Vernon Oswald and Lowell Ahart 1997-6-24 8609 Lassen 0.7 mi e of boundary of Lassen National Forest (s of Susanville on n side of Diamond Mountain along Forest Road 29N43, 5.4 mi e of Gold Run Road (29N10)); Diamond Mountain, Forest Road 29N43 1889 Comment
  JEPS94454  Sanicula graveolens Vernon Oswald and Lowell Ahart 1997-6-24 8629 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
  JEPS947  Sanicula tuberosa G. S. Crew, C. S. Robinson 6/1/1927-7/1/1927 12 Lassen near Westwood Junction (Lassen National Forest, Norval Flat, sw Lassen County); Lassen National Forest, Norval Flat 2051 Comment
  SEINET10579543  Sanicula tuberosa Katherine L. Morris, David B. Dunn; Melvin L. Conrad 1973-5-25 Morris 242 Lassen Collected 7.6 mi. NW of Jct. of Hwy 36 & 44 on Hwy 44. Comment
  SEINET3239873  Santalaceae R. L. Mathiasen 2010-1 1018 Lassen 16 km W of north entrance to Lassen Nat. Park on Rte. 44 1380 Comment
  CAS-BOT-BC110336  Sarcobatus vermiculatus Louella Bass 1982-6-20 s.n. Lassen West of Karlo. Comment
  HSC17990  Sarcodes sanguinea M. S. Baker 1890-3 Lassen Honey Lake Valley Comment
  JEPS59098  Sarcodes sanguinea Mary G. Clark 1918-5-24 Lassen Westwood, Lassen Co. Comment
  JEPS96023  Saxifraga oregana Vernon H. Oswald and Lowell Ahart 1996-6-24 7889 Lassen 0.5 mi e of Eagle Lake Road ((A1) and 2.5 mi s of Eagle Lake, Papoose Meadows, Modoc Plateau, Montane Meadow); Papoose Meadows, Modoc Plateau, Montane Meadow 1633 Comment
  CAS-BOT-BC283087  Schedonorus arundinaceus Margaret Williams; Louella Bass 1972-10-22 EV 3 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 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
  UC1254995  Scirpus microcarpus Alan A. Beetle 1941-6-28 2893 Lassen Rt. 36 10 mi w Chester; w of Chester 1524 Comment
  UC1609484  Scirpus nevadensis Vernon H. Oswald and Lowell Ahart 1993-6-14 5521 Lassen ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd. (Lassen A1) at Sandy Beach on the w shore Eagle Lake, upper beach between rd. & lake); Sandy Beach, w shore Eagle Lake 1566 Comment
  UC766119  Scirpus nevadensis R. F. Hoover 1940-10-10 4679 Lassen Litchfield Comment
  SEINET6727388  Sclerolinon digynum J. T. Howell, G. H. True., Jr. 1973-6-28 49490 Lassen Sierra Nevada, Elysian Valley 1326 Comment
  CAS-BOT-BC240002  Scribneria bolanderi Alice Eastwood; John Thomas Howell 1940-6-11 7974 Lassen Big Valley Mts. Comment
  CHSC66422  Scribneria bolanderi Vernon H. Oswald; Lowell Ahart 1996-6-17 7804 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On a flat on the N side of the trail between Devils Corral Trailhead and the 6.0 mile post. 1420 Comment
  CHSC7755  Scrophularia californica Beverley J. Wise 1969-5-18 110 Lassen 18.2 mi. N. E. of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. North sidewall of Willow Creek Canyon. 1463 Comment
  NY415691  Scutellaria holmgreniorum N. H. Holmgren 1980-7-5 9524 Lassen 21.9 km (13.6 mi.) from U.S. Hwy. 395 via Rye Patch Canyon, 24 km (15 mi) airline distance SE of Ravendale 1580 Comment
  CAS-BOT-BC214260  Scutellaria nana Arnold Tiehm; James Young; Raymond Evans 1984-6-7 8591 Lassen Flats on the northwest side of Shaffer Mountain, 7.5 air miles north-northwest of Litchfield 1371 Comment
  JEPS62885  Scutellaria nana L. S. Smith C. 1918 Lassen Bieber Range, nw Lassen County Bieber Range 1371 Comment
  UC1609176  Scutellaria nana Vernon H. Oswald and Lowell Ahart 1993-6-28 5595 Lassen e of Poison Lake (Harvey Valley Rd. (33N02), 2.0 mi n of Hwy 44, between Grays Valley and Harvey Valley); Harvey Valley Rd. 1734 Comment
  UC25818  Scutellaria nana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC240086  Secale cereale David D. Keck; J. Clausen 1935-6-24 3750 Lassen 2 mi. S. of Ravendale 1464 Comment
  CDA28589  Secale cereale D. Haskelle 2000-2-7 s.n. Lassen Doyle. 0 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
  UC831880  Senecio aronicoides A. A. Heller 1938-6-4 15143 Lassen w of Fredonyer Pass (on Highway 36) 1676 Comment
  POM260867  Senecio eurycephalus Alice Eastwood, J. T. Howell 1940-6-11 7968 Lassen Eastern Fall River Valley. Comment
  UCD135528  Senecio hydrophiloides Raymond D. Ratliff 1966-6-28 8 Lassen Lassen National Forest, Gooch Valley - Plot 70. 1828 Comment
  CAS-BOT-BC363686  Senecio hydrophilus A. A. Heller 1938-6-23 15192 Lassen About 4 miles east of Westwood 1432 Comment
  UC1583967  Senecio hydrophilus G. Schoolcraft 1990-8-14 2122 Lassen between M.P. 56 and 57 on Highway 139 s Adin 1432 Comment
  HSC42542  Senecio hydrophilus Barbara Kelly 1977-8-9 564 Lassen 15 miles east of Madeline on a dirt road from Adin Comment
  UCD135547  Senecio integerrimus Grady L. Webster 1989-5-13 7723 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  HSC63728  Senecio integerrimus Teresa Prendusi 1980-4-30 Lassen NE of Snowstorm Ranch near Kalo Rd., Ravendale; near railroad tracks 1585 Comment
  RSA0124942  Senecio integerrimus var. exaltatus Philip A. Munz 1947-5-18 11861 Lassen Fredonyer Forest Public Camp Ground, west of Susanville. 1509 Comment
  CAS-BOT-BC363984  Senecio integerrimus var. major John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49176 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC341186  Senecio lugens John Thomas Howell 1934-6-14 12159 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  SFV10993  Senecio serra J. Turner, F. M. Ball (1192) 1962-7-13 s. n. Lassen Laufman Public Camp, 3 miles off Highway 395 from Milford near Honey Lake. 1494 Comment
  UC1562885  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
  UC36171  Senecio triangularis M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC364254  Senecio triangularis Clare B. Hardham 1971-8-22 18409 Lassen Diamond Mountain. Aspen Swamp, North slope Comment
  CDA2461  Setaria verticillata Willis Wheeler Oct 1930 Lassen 0 Comment
  CHSC99148  Sidalcea oregana subsp. spicata Lowell Ahart; John Dittes 2008-6-19 14890 Lassen East bank of Willow Creek, about 30 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  RSA703717  Sidalcea oregana var. maxima Arnold Tiehm, Jan Nachlinger, Margaret J. Williams 1988-6-2 11704 Lassen East side of Snowstorm Mt., 18.1 road miles north of the Wendel road on highway 395 from Susanville to Alturas 1402 Comment
  CAS-BOT-BC384312  Silene bernardina Clarence R. Quick 1966-7-22 66 -52 Lassen Susanville-Pittville road, Blacks Mtn. Hdqts.; Halls Flat, 9 m. e. of Hat Creek 1706 Comment
  CAS-BOT-BC389264  Silene lemmonii Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville. Perkin's Ranch 2133 Comment
  CHSC59709  Silene menziesii Mary Meyer 1980-7-28 Lassen 2148 Comment
  SD61034  Silene menziesii Darley F. Howe 1964-8-1 3908 Lassen Parsnip Creek, Warner Mountains, Modoc National Forest. 1830 Comment
  SJSU5887  Silene menziesii H. L. Buckalew 1961-7-8 Lassen Blue L, Warner Mts 1828 Comment
  UC569941  Silene nuda E. Sawyer 1935-6-27 223 Lassen Long Valley Sierraville Quad., Long Valley Comment
  CHSC111252  Sisymbrium altissimum L. P. Janeway; B. Castro 2012-7-2 10935 Lassen Modoc Plateau. Along Smoke Creek Ranch Road 6.9 road km east of Hwy 395. 1387 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
  RSA716268  Sisymbrium altissimum L. Ahart, John Dittes 2005-6-2 11921 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4.75 miles (air) N of the intersection of Scott Road and Hwy 70, 6.2 miles (air) NW of Hallelujah Junction. 1460 Comment
  SEINET10448865  Sisymbrium altissimum Paul Gallian, David B. Dunn 1971-6-2 Gallian 487 Lassen 5 mi. S. Of milford near honey lake on us 395, along roadside in grass- artemesia tridentata assoc; quercus- jeffrey pine on mountain range to w. At approximately the same altitude. Comment
  JEPS88552  Sisyrinchium bellum Vernon H. Oswald and Lowell Ahart 1996-6-24 7875 .1 Lassen ca 0.5 mi e Eagle Lake Rd. (A1) (and 2.5 mi s of Eagle Lake, in meadow bordering Papoose Creek where it leaves the n end of the meadow); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  SBBG128753  Sisyrinchium bellum L. Ahart, J. Dittes 2008-6-20 14964 Lassen ca. 10 yards W of where the levee rd crosses Big Valley Canal, in Big Valley, ca. 4 mi (air) NE of the Headquarters at Ash Crk State Wildlife Area, ca. 7 mi (air) NE of Bieber 1263 Comment
  UC21380  Sium suave J. Burtt Davy Jun 17 1897-Jun 24 1897 3363 Lassen Honey Lake Valley Comment
  CDA34234  Solanum sarrachoides L. Ahart, J. Dittes 2010-8-31 17138 Lassen On the east side of Walters Road, 4,235 feet from Modoc County Line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. Comment
  CDA18276  Solanum triflorum G. D. Barbe 1974-8-2 1942 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  HSC42458  Solanum triflorum Barbara Kelly 1977-8-9 571 Lassen 9.2 mi. E of Madeline on the dirt rd. from Adin Comment
  UC1037338  Solidago spectabilis Leo Whitney 1934-7-3 1786 Lassen Harvey Valley Springs, ca. 14 miles west of Eagle Lake, Lassen National Forest 1737 Comment
  UC1192245  Sonchus asper Verne Grant and Irving Schneider 1947-7-30 8190 Lassen s point w embayment Tule Lake; s point of w embayment Tule Lake Comment
  CAS-BOT-BC236547  Sorghum halepense Louella Bass 1980-7-29 EV 5 -80 Lassen Elysian Valley, Hwy. 395 at County Road 207, near Jamesville, Sierra Nevada Comment
  CHSC59194  Sparganium angustifolium Vernon H. Oswald; Lowell Ahart 1992-9-15 5214 Lassen Lassen Volcanic National Park. Island Lake located N of Bonte Pk. and ca. 1.5 mi W of Juniper Lake campgrounds. On the margin of the lake. 2164 Comment
  HSC95264  Sparganium emersum Gordon Leppig 1998-8-17 1052 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC438841  Sparganium natans Andrew Townesmith; Karen M. Meyer 2007-7-22 844 Lassen Lassen National Forest, Almanor Ranger District. 0.25 miles west of Forest Service road 10 on Forest Service road 31N24. 1981 Comment
  CAS-BOT-BC213212  Sphaeralcea grossulariifolia Louella Bass 1980-6-10 s.n. Lassen Transplanted to the garden of Edward and Luella Bass in Standish, from Stacy, east of the south end of Honey Lake 1219 Comment
  CAS-BOT-BC374760  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1989-5-3 1865 Lassen North end of Secret Valley s. of Karlo Comment
  JEPS103181  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 2000-6-19 2905 Lassen Flat SE of Ravendale BLM Fire Station 1645 Comment
  CAS-BOT-BC383109  Spiraea douglasii Andrew Townesmith; Karen M. Meyer 2007-7-20 840 Lassen Lassen National Forest, Eagle Lake Ranger District. Along Forest Service road 30N03, 0.5 mile from intersection with state route 36, at roadblock where two decrepit bridges cross Susanville River 1429 Comment
  CHSC61074  Spiranthes porrifolia Vernon H. Oswald 1993-8-3 5754 Lassen Cooper Swamp located E of Siver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  HSC95268  Spiranthes romanzoffiana Gordon Leppig, J. Cromwell 1997-7-26 601 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1037284  Spiranthes romanzoffiana Leo Whitney 1934-7-21 1710 Lassen Harvey Valley Spring Lassen National Forest, Harvey Valley (ca 14 mi w of Eagle Lake) 1737 Comment
  JEPS63054  Stachys ajugoides var. rigida Brown and Wieslander ca. 1914 57 Lassen near Eagle Lake; Martin Sprs. Comment
  SEINET10700599  Stachys ajugoides var. rigida Karen M. Meyer, Andrew Townesmith 2007-7-21 Meyer 142 Lassen Lassen National Forest. 1.3 mi. on rd. 110, off Hwy. A21. 1821 Comment
  CHSC64776  Stanleya pinnata var. pinnata Vernon H. Oswald 1995-6-7 6841 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) near milepost 19.5 just w of Skedaddle Creek, e of Wendel, ne of Susanville. Flat bordering the road. 1237 Comment
  CAS-BOT-BC60992  Stanleya viridiflora H. D. Ripley; R. C. Barneby 1943-6-15 5761 a Lassen Smoke Creek, northeast of Kesiland [illegible?]. 1341 Comment
  JEPS95975  Stanleya viridiflora Vernon H. Oswald and L. 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: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  SD8165  Stellaria calycantha Mrs. R. M. Austin August 1882 Lassen Comment
  SEINET11933235  Stellaria longipes J. D. Prouty 1978-1 29 Lassen S of Eagle L., along Papoose Creek, ca 1 mi from Gallatin Rd., T31N, R11E, Sec. 17 1591 Comment
  CAS-BOT-BC391079  Stellaria longipes subsp. longipes B. C. Cain 1925-8-24 69 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park Comment
  UCD99326  Stellaria longipes subsp. longipes Cindy Prouty 1978-7-27 5 Lassen Papoose Creek, S of Eagle Lake. 1584 Comment
  CAS-BOT-BC375066  Stephanomeria Gordon H. True 1973-8-22 7657 Lassen North shore of Honey Lake ca. 5 miles east of Janesville & just west of Hartson Reservoir 1219 Comment
  UC1587037  Stephanomeria lactucina G. Schoolcraft 1991-7-30 2200 Lassen e slope Widow Mountain 1859 Comment
  POM147898  Stephanomeria lactucina J. B. Feudge 1927-7-20 1781 Lassen Westwood. Comment
  POM33607  Stephanomeria spinosa Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CAS-BOT-BC322921  Stephanomeria tenuifolia George W. Gillett 1957-7-26 901 Lassen Butte Lake, Lassen Volcanic National Park 1844 Comment
  CHSC118491  Stipa hymenoides Don Lepley 2015-6-16 Lassen Lassen National Forest. Eagle Lake Ranger District. A little north of County Road A-1 about 1/3 mile southwest of Sandy Beach cinder pits and two air miles north of Spalding marina. UTM 686984 x 4506793 1563 Comment
  JEPS122358  Stipa lemmonii var. lemmonii Joseph Broberg, Jaycee Leonard 2012-6-28 CA 320 -104 Lassen From Alturas, head west on 299. 2 miles after Nubieber turn left at American flag and signs for Sierra Pacific Industries. Muck Valley Allotment. Collection site is at end of spur road Comment
  JEPS126469  Stipa thurberiana Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-18 CA 350 -039 Lassen Take 139 towards Antelope Grade and take a right after passing the fire station. Continue on dirt road for less than 0.5 miles. Comment
  UCD51436  Stipa thurberiana A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3362 Lassen 10 miles NE of McArthur. Comment
  UCR183194  Stipa thurberiana Jim Andre, G. L. Clifton 1993-5-28 7715 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  CHSC5251  Swertia albicaulis var. albicaulis 1944-6-23 Lassen Eagle Lake. 1615 Comment
  CHSC60831  Swertia albicaulis var. albicaulis Vernon H. Oswald; Lowell Ahart 1993-6-28 5605 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  JEPS123497  Symphoricarpos longiflorus Wilson Collison, Jaileen Merced 2015-8-8 CA 320 -143 Lassen To Highway 139 W (North) from Termo - Grasshopper Road continue 4.5 mi (1 mile after entering forest). Turn right on to Grand Road (37N29). Continue uphill (East), right at 1st fork, straight at 2nd. Comment
  JEPS13650  Symphoricarpos mollis Mrs. R. M. Austin 1879-1 Lassen Mt. Dyer; extreme sw Lassen County near Plumas County boundary 2277 Comment
  CHSC12410  Symphoricarpos rotundifolius var. rotundifolius Lynn R. Thomas 1969-6-20 133 Lassen Road up Black Mt. N of Five Corners, ca. 3 mi S of E. L. B. S. 1706 Comment
  CHSC23553  Symphoricarpos rotundifolius var. rotundifolius W. O. Baum 1971-7-5 21 Lassen N slope of Gallatin Peak. 2011 Comment
  CHSC67077  Symphoricarpos rotundifolius var. rotundifolius Jeanne Boze 1981-6-12 120 Lassen 1/4 mi. south of Eagle Lake Field Station. 1615 Comment
  UC773939  Symphoricarpos rotundifolius var. rotundifolius L. R. Short and Wm. Gansberg 1936-7-3 S- 468 Lassen Burgess Spring Experimental Range; Lassen National Forest 1847 Comment
  UC1143049  Symphyotrichum ascendens L. R. Short 1936-8-24 S- 498 Lassen Burgess Spring Experimental Range Lassen National Forest, Burgess Spr. Exp. Range 1792 Comment
  CHSC118847  Symphyotrichum bracteolatum L. P. Janeway 2015-8-10 11830 Lassen Warner Mountains. Steep west-facing slope above the 64 Road (39N01 - the road to Patterson Campground), 0.2 km north-northeast of crossing of East Creek; between Peterson Meadow and Long Valley. 2047 Comment
  JEPS103196  Symphyotrichum bracteolatum G. Schoolcraft 1996-9-9 2585 Lassen Lower end of Willow Creek below petroglyphs 1310 Comment
  SD64326  Symphyotrichum campestre Darley F. Howe 1966-8-25 Lassen 41 miles south of Alturas on Highway 395 1675 Comment
  CAS-BOT-BC98930  Symphyotrichum foliaceum var. parryi B. C. Cain 1925-8-24 111 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  CAS-BOT-BC98931  Symphyotrichum foliaceum var. parryi B. Bartholomew; B. Anderson 1988-7-22 4495 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountain 2080 Comment
  CHSC66848  Symphyotrichum frondosum Vernon H. Oswald 1996-9-21 8286 Lassen Modoc Plateau. Willow Creek Wildlife Area on Hwy. 139 ca. 10 mi (air) N of Susanville. On the S edge of Willow Creek ca. 1 mi E of the parking area on the highway. 1490 Comment
  UC1924205  Symphyotrichum spathulatum Debra Valov 2005-8-20 2005219 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  UCD136663  Symphyotrichum spathulatum var. yosemitanum Barbara L. Wilson; R. Brainerd, D. Lytjen, et al. 2004-8-24 11184 Lassen Snowstorm Creek, at a spring; upstream of Biscar Reservoir, west of an old railroad right of way. 1463 Comment
  CAS-BOT-BC376848  Taraxacum John Thomas Howell 1934-6-14 12139 Lassen Near Lost Lake, Warner Mts. 2438 Comment
  CHSC7643  Taraxacum officinale Beverley J. Wise 1969-3-4 30 Lassen 0.5 mi. north of Susanville on Hwy 139. 1310 Comment
  CHSC30556  Taraxia subacaulis Sori H. Shad 1970-6-26 15 Lassen Collected in Deans Meadow. 1828 Comment
  CHSC36454  Taraxia tanacetifolia Susan H. Euing 1982-6-6 8 Lassen Pine Creek below fish trap. Comment
  CHSC91182  Taraxia tanacetifolia Lowell Ahart; John Dittes 2005-6-1 11856 Lassen In the center 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
  SEINET5345198  Taraxia tanacetifolia M. J. Williams 1974-7-26 74 -L-24 Lassen 2 mi west of Hallelujah Junction, south of Hwy 70 1494 Comment
  UC572206  Taraxia tanacetifolia E. Sawyer 1935-6-27 219 Lassen Long Valley Sierraville Quadrangle 1310 Comment
  UC1537604  Taraxia tanacetifolia Gordon H. True Jr. 1936-6-26 543 Lassen Honey Lake-Willow Creek Valley Road 1493 Comment
  CAS-BOT-BC329046  Tetradymia canescens Elmer I. Applegate 1897-6-4 855 Lassen North end of Madeline Plains, northern Lassen County Comment
  CHSC64761  Tetradymia canescens Vernon H. Oswald 1995-6-7 6838 Lassen Modoc Plateau. Ridge on the n side of Wendel Rd. (Lassen 320) at milepost 11.0, 5.6 mi e of Wendel, ne of Susanville. 1261 Comment
  JEPS38112  Tetradymia canescens W. L. Jepson 1918-8-2 7789 Lassen Long Valley 1371 Comment