Search Results — 2000 specimen records retrieved (1602 records with coordinates)
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CHSC84856  Abies concolor L. P. Janeway; B. Castro 2003-10-5 8002 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
  CAS-BOT-BC330611  Acer glabrum var. glabrum John Thomas Howell; Gordon H. True 1973-8-1 50152 Lassen Sierra Nevada. Gold Run Creek road S of Susanville, Diamond Range 1584 Comment
  OBI76923  Acer glabrum var. torreyi Anthony Baniaga 2011-7-10 441 Lassen Lassen Natl forest. E side of Diamond Mtn, along 28N64. Diamond Mtn quad t29N R11E sec 3 NW of NW 2012 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
  RSA647518  Achnatherum hymenoides Marion P. Harthill 1972-6-16 777 Lassen Doyle 1372 Comment
  UCD55573  Achnatherum hymenoides Beecher Crampton 1964-6-27 7090 Lassen Ca. 8-9 miles NE of Susanville. 1828 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
  UCD32658  Achnatherum lemmonii Beecher Crampton 1954-7-5 2054 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD50700  Achnatherum lemmonii G. L. Stebbins Jr.; J. A. Jenkins 1937-7-11 2323 Lassen Black Mt. about mile below summit. Lassen County. 1950 Comment
  CAS-BOT-BC110708  Achnatherum nevadense G. Schoolcraft 1997-6-26 2600 Lassen Large knob between Milford and Janesville. 1676 Comment
  CHSC64900  Achnatherum nevadense Vernon H. Oswald 1995-6-19 6879 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395. 1383 Comment
  SEINET7593424 Image available Achnatherum occidentale John Thomas Howell 1934-1 12431 Lassen Hall's Flat Comment
  CHSC109530  Achnatherum occidentale subsp. californicum B. Castro; L. P. Janeway 2003-10-5 1459 Lassen High Cascade Range. Caribou Wilderness Area; ca 3 mi SW of Bogard Buttes and 1 mi E of Black Butte, along trail between Cone Lake and Triangle Lake, ca 0.8 mi S of Cone Lake and end of USFS Rd 32N09A. 2103 Comment
  UC1024805  Achnatherum occidentale subsp. californicum Leo Whitney 1935-6-23 3288 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1143047  Achnatherum occidentale subsp. californicum L. R. Short and W. Gansberg 1936-6-2 S- 3666 Lassen Burgess Spring Experimental Range Lassen National Forest 1858 Comment
  UCD51122  Achnatherum occidentale subsp. californicum L. R. Short; W. Gansberg 1936-6-2 S 366 Lassen Burgess Spring Experimental Range, Lassen National Forest. 1858 Comment
  UC1024688  Achnatherum occidentale subsp. occidentale Leo Whitney 1933-7-15 2157 Lassen 16 mi w of upper end of Eagle Lake; Lassen National Forest, Harvey Montain Comment
  UC1133257  Achnatherum occidentale subsp. occidentale H. P. Hagge 1929-9-17 38 Lassen Logan Mtn. Eagle Lake Quadrangle, Logan Mtn. Comment
  UC506985  Achnatherum occidentale subsp. occidentale George A. Fisher and Irwin H. Johnson 1933-7-12 F- 215 Lassen Lassen Forest 1706 Comment
  CAS-BOT-BC218615  Achnatherum occidentale subsp. pubescens John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49486 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 Comment
  UCD18960  Achnatherum occidentale subsp. pubescens Raymond D. Ratliff 1965-7-12 16 Lassen Lassen National Forest, Harvey Valley Allotment (HV-81-76 and 21-15). 1737 Comment
  UCD32655  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2051 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD51211  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2064 Lassen along Hwy. 36, 4.5 miles west of Susanville. 1432 Comment
  UCD51228  Achnatherum occidentale subsp. pubescens George A. Fischer; Irwin H. Johnson 1933-7-12 F 218 Lassen Lassen County. 1722 Comment
  CAS-BOT-BC218008  Achnatherum thurberianum John Thomas Howell 1976-7-20 52005 Lassen About 5 miles W of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  CHSC42221  Achnatherum thurberianum C. E. Laver 1985-8-12 Lassen Ca. 8.5 mi se of Madeline and 9 mi ne of Termo. 2194 Comment
  RSA700231  Achnatherum thurberianum L. P. Janeway 2001-6-20 7205 Lassen High Cascade Range. 0.6 km east of Road 111 and 1.3 km south of Road 35N60; about 11 km west of Little Valley, 3.9 km east-northeast of Coble Mountain. 1402 Comment
  SEINET235273 Image available Achnatherum thurberianum CSU Chico Lassen unspecified Comment
  SEINET235293  Achnatherum thurberianum CSU Chico Lassen unspecified Comment
  UC1026712  Achnatherum thurberianum Leo Whitney 1935-6-25 3311 Lassen 13 mi w of upper end Eagle Lake; Ashurst Mountain Comment
  UC1031354  Achnatherum thurberianum Leo Whitney 1935-6-19 3258 Lassen 13 mi w of upper end Eagle Lake; Lassen National Forest, Ashurst Mt. 1584 Comment
  UCD51427  Achnatherum thurberianum B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  UCD51444  Achnatherum thurberianum R. Tofsrud 1947-7-1 223 Lassen Between Ravendale and Thermos. Comment
  UC1037345  Achnatherum webberi Leo Whitney 1935-7-3 3587 Lassen Ashurst Mt. Comment
  UC769950  Achnatherum webberi R. F. Hoover 1940-9-29 4647 Lassen pass between Shaffer Mt. and Warren Peak Comment
  CHSC117295  Acmispon americanus var. americanus Lowell Ahart; John Dittes 2016-7-13 21119 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber , 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC29897  Acmispon americanus var. americanus Robin L. Ondricek 1978-7-7 91 Lassen Below the dam in Murrers Upper Mdw. 1548 Comment
  CHSC113083  Acmispon denticulatus Lowell Ahart; John Dittes 2013-7-23 18888 Lassen Drainage filled with dirt from construction of a pond, 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS121257  Acmispon denticulatus Lowell Ahart, John Dittes 2013-7-23 18888 Lassen 40 yards S of the man-made pond, about 110 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-BC412873  Aconogonon davisiae Lassen 1927 G. S. Crew 1927-6-25 31 Lassen Lassen National Forest. Norval Flat 1747 Comment
  CAS-BOT-BC412871  Aconogonon davisiae Brighton C. Cain 1925-8-25 127 Lassen Horse trail from summit of Mt. Lassen to Drakesbad, Mt. Lassen Volcanic National Park Comment
  JEPS94535  Actaea rubra Vernon Oswald and Lowell Ahart 1997-6-24 8612 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
  JEPS35591  Adonis aestivalis Wayne Savage 1964-7-1 339 Lassen 1/2 mi n of Willow Creek Guard Station (16 mi n of Susanville, on State Highway 139, 54 mi s of Adin); State Highway 139 1219 Comment
  UCD51460  Aegilops cylindrica Andy Babcock 1981-6-10 s.n. Lassen Comment
  CHSC12958  Agastache parvifolia K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5804 Lassen W side of Hwy. 139, ca. 7.7 mi n of Murrer Ranch turnoff, ca. 100 yds. s of Colley Point overlooking Eagle Lake. Comment
  CHSC4853  Agastache parvifolia R. Carter 1967-7-13 584 Lassen On the s side of road to Eagle Lake Biology Station and Willow Creek. 1584 Comment
  CHSC5269  Agastache parvifolia J. B. Kimsey 1946-6-10 Lassen 1615 Comment
  CHSC9544  Agastache parvifolia L. E. Ray 1967-6-25 53 Lassen Coll. ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  JEPS126482  Agastache parvifolia Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-4 CA 350 -055 Lassen At Fredonyer Peak. Comment
  SEINET11261375  Agastache parvifolia Robert L. Johnson, Mikel R. Stevens 2015-7-10 3929 Lassen 5.6 rd miles west of jct with Hwy 395 beginning on Dawn Dr, then continuing on road to summit of Shaffer Mountain. Ca 16 air mi ene of downtown Susanville.; 0 1910 Comment
  HSC86888  Agastache parvifolia R. Carter 1967-7-3 584 Lassen S side of rd. on way to Eagle Lake Biology Station and Willow Creek 1585 Comment
  POM147886  Agastache urticifolia J. B. Feudge 1927-7-20 1754 Lassen Westwood Comment
  CHSC23487  Ageratina occidentalis Wayne O. Baum 1971-7-22 71 -59 Lassen E slope of Gallatin Peak. 2072 Comment
  CAS-BOT-BC30234  Ageratina occidentalis Hans Leschke 1961-8-18 1832 Lassen Summit area of Diamond Peak 2423 Comment
  UC29341  Agoseris X dasycarpa M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixey Valley Dixey Valley Comment
  UC468890  Agoseris X dasycarpa J. Burtt Davy Jun 17 1897-Jun 24 1897 3405 Lassen Chat Long Valley Comment
  SEINET10925084  Agoseris glauca Paul Gallian, David B. Dunn 1971-6-2 Gallian 510 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
  RSA715616  Agoseris glauca var. glauca L. Ahart 2005-6-1 11849 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  UC1609115  Agoseris glauca var. glauca Vernon H. Oswald and Lowell Ahart 1993-6-14 5530 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach on W shore of lake (ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), upper beach, between road and lake); Eagle Lake 1566 Comment
  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
  UCD128593  Agoseris grandiflora G. Schoolcraft 2000-6-19 2904 Lassen Susanville; west of Cold Spring Valley. 1706 Comment
  CHSC68840  Agoseris heterophylla Vernon Oswald; Lowell Ahart 1997-6-24 8601 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. (20N10). 1655 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
  JEPS94999  Agoseris heterophylla Vernon Oswald and Lowell Ahart 1997-6-24 8601 Lassen s of Susanville (on n side of Diamond Mountain at a stream on Forest Road 29N43, 3.5 mi e of Gold Run Road); Diamond Mountain, Forest Road 29N43 1655 Comment
  RSA416397  Agoseris heterophylla Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  SEINET6738695 Image available Agoseris heterophylla M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-12 80- 19 -1 Lassen Smoke Creek Rd., 0.1 mile E of Hwy 395 1372 Comment
  UC29359  Agoseris heterophylla var. heterophylla M. S. Baker and Frank Nutting 1894-7-2 Lassen s side Dixey Mts. 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
  UC1125451  Agoseris parviflora A. Simontacchi 1940-6-8 838 Lassen 1.2 mi ne Ebey Lake; Halls Flat Quad. 1699 Comment
  UC1136777  Agoseris parviflora L. R. Short and J. Warren 1936-6-5 S- 372 Lassen Burgess Spr. Exp. Range Lassen National Forest 1798 Comment
  UC584270  Agoseris parviflora G. L. Stebbins Jr. and J. A. Jenkins 1937-7-11 2325 Lassen about 1 mi below summit Black Mt. 1940 Comment
  CAS-BOT-BC13413  Agoseris retrorsa Louella Bass 1973-5-29 82 Lassen Elysian Valley 1325 Comment
  SEINET10509727  Agropyron desertorum Paul Gallian, David B. Dunn 1971-6-2 Gallian 484 Lassen 5 mi s of milford near honey lake on us hwy 395; along roadside in grass Artemesia tridentata assoc; quercus jeffery pine on mtn range to west at Approximately the same altitude. 1250 Comment
  SEINET12950845  Agrositanion saundersii B. L. Wilson, D. Lytjen, N. Otting 2005-7-29 11518 Lassen Smith Flat on Cedar Creek, 6 or 7 miles E of Madeline, N of County Road 510; Blue Door Flat.; 41.08261 -120.34968 1692 Comment
  JEPS100322  Agrostis exarata Dean W. Taylor 2001-7-12 17829 Lassen Diamond Mountains, spring at mouth of canyon ca. 4 miles NW of Constantia, along Forest Road 25N02X 1341 Comment
  UC1142988  Agrostis exarata A. L. Hormay 1941-6-25 21 Lassen Burgess Spring Lassen Forest 1676 Comment
  UC53496  Agrostis pallens M. S. Baker and Frank Nutting 1894-7-21 Lassen Eagle Lake 1524 Comment
  UCD53252  Agrostis pallens M. S. Baker; Frank Nutting 1894-7-21 s.n. Lassen Eagle Lake. 1524 Comment
  UCD53299  Agrostis scabra L. Whitney 1933-8-15 s.n. Lassen Meadow near Sheepshead. Comment
  CAS-BOT-BC246539  Agrostis stolonifera Leland S. Smith 1919-8-10 1132 Lassen Modoc National Forest, Ash Valley - Templeton's Meadow 1463 Comment
  SEINET4342189  Agrostis stolonifera B. L. Wilson, D. Lytjen 2005-7-25 11489 Lassen Deep Creek, near confluence with a smaller stream 1359 Comment
  CHSC77261  Agrostis variabilis G. Schoolcraft 1997-8-6 2662 Lassen Dimond Mtn. 2316 Comment
  POM75042  Aliciella lottiae Marcus E. Jones 1897-6-22 9875 Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  SEINET12558767 Image available Aliciella triodon A. Tiehm 1980-1 5756 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  JEPS88427  Alisma plantago-aquatica Vernon H. Oswald and Lowell Ahart 1996-8-1 8106 Lassen sw Westwood (shore of reservoir ne of Indian Ole Dam); Mountain Meadows Reservoir 1539 Comment
  UC55670  Alisma plantago-aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3337 Lassen Susan River Honey Lake Valley 1219 Comment
  UC1567412  Allium acuminatum G. Schoolcraft 1989-5-31 1893 Lassen along Skedaddle Ranch Rd. near stateline 1584 Comment
  UC1299748  Allium acuminatum Freed W. Hoffman 1946-6-9 739 Lassen on Highway 395 about 10 mi s Alturas; Dry Creek Comment
  UC119964  Allium amplectens T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  UC3062  Allium amplectens M. S. Baker and F. Nutting 1894-7-1 Lassen Dixey Mts. Comment
  UC3055  Allium anceps Mrs. C. C. Bruce June, 1898 Lassen Madeline Plains Comment
  HSC47285  Allium anceps Dale McNeal 1978-5-30 2127 Lassen Beside Hwy. 395, 3 mi. S of Ravendale Comment
  SEINET8117272  Allium atrorubens A. Tiehm, J. Nachlinger, M. J. Williams 1988-1 11702 Lassen S side of Shaffer Mountain, 3.4 road miles N of the Wendel road on highway 395 from Susanville to Alturas, W of the highway. 1387 Comment
  POM110223  Allium campanulatum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  JEPS87459  Allium lemmonii Vernon H. Oswald and Lowell Ahart 1993-6-28 5587 Lassen e. of Poison Lake (Harvey Valley Rd. (33N02), 1.2 mi n. of Hwy. 44, e side of Grays Valley); Grays Valley 1731 Comment
  RSA125593  Allium lemmonii Peter H. Raven, Otto T. Solbrig 1958-6-17 13288 Lassen U. S. Highway 395, 1.8 miles south of Ravendale. Comment
  UC1229822  Allium lemmonii Gus Hormay 1961-6-15 Lassen experimental forest ot Patterson Flat Patterson Flat Comment
  HSC22953  Allium lemmonii John Pratt 1970-6-21 32 Lassen 1707 Comment
  CAS-BOT-BC474047  Allium parvum Louella Bass 1973-4-15 20 Lassen Elysian Valley 1325 Comment
  JEPS103165  Allium parvum Beth Corbin 2002-4-11 1055 Lassen Near Skedaddle Ranch Rd, ca 1/2 mi ENE of East Side Reservoir. 1493 Comment
  SEINET8191388  Allium parvum L. Miller 1934-3-29 s.n. Lassen E of Susanville. Comment
  UCD138584  Allium parvum G. Schoolcraft 1993-4-27 2256 Lassen Ash Valley RNA 16 miles east of Adin, Ca. 1554 Comment
  SEINET3878898  Allium platycaule D. W. McNeal 1980-6-1 2339 Lassen In open areas on the slope below Hwy #139, 19.2 mi S of the Modoc Co. line.; 0 Comment
  RSA537548  Alnus incana Barbara Ertter 1988-7-25 7868 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2256 Comment
  UC1135175  Alnus incana subsp. tenuifolia C. W. Hanks 1934-9-27 94 Lassen Long Valley Sierraville Quadrangle (w slope, near Plumas National Forest) Comment
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May 8 2013
  UC1586110  Alnus incana subsp. tenuifolia Barbara Ertter 1988-7-25 7868 Lassen ridge of mts. ca 1.5 mi due e Diamond Peak (n face, ca 10 air mi due s of Susanville); Diamond Mts. 2255 Comment
  CAS-BOT-BC332746  Alopecurus R. F. Thorne; Larry E. DeBuhr 1975-8-22 46987 Lassen Along Hwy 395 ca 6 miles N of Madeline and 4.5 miles S of Modoc county line 1615 Comment
  RSA264236  Alopecurus aequalis A. A. Beetle 1948-6-28 2795 Lassen 10 miles west of Chester, rte. 36 Comment
  UC60734  Alopecurus aequalis M. S. Baker and F. Nutting 1894-7-1 Lassen n. side Dixey Mts. Comment
  UCD55871  Alopecurus aequalis Beecher Crampton 1964-6-27 7097 Lassen ca. 8 miles southeast Ravendale B.L.M. Spanish Springs- Shinn Mountains Resource Conservation area. 1981 Comment
  SEINET10510844  Alopecurus aequalis Alan A. Beetle 1941-6-28 Beetle 2795 Lassen 10 miles west of Chester, rte 36, open meadow near small stream. Assoc. Scirpus congdoni, Deschampsia, Ranunculus. Comment
  RSA772750  Alopecurus aequalis var. aequalis R. F. Thorne, Larry E. DeBuhr 1975-8-22 47211 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  UCD18957  Alopecurus geniculatus Raymond D. Ratliff 1965-7-22 20 Lassen Lassen National Forest, Harvey Valley Allot. (HV 78-73). 1706 Comment
  SEINET5340064  Alyssum desertorum M. J. Williams, A. Tiehm, J. Nachlinger 1988-6-2 88- 27 -4 Lassen Hwy 395, 0.4 mile E of Susanville road after turn to Alturas. Comment
  SEINET5340073  Alyssum desertorum J. A. Young 1982-1 s.n. Lassen M. Meyer's Ranch, Adin. 1372 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
  CHSC106172  Amaranthus blitoides Lowell Ahart; John Dittes 2010-8-30 17090 Lassen North side of the road, between Elkins Lane and Walters Road, 550 feet south of Modoc County Line, about 4.3 miles (air) west of Adin, about 7.7 miles (air) northeast of Bieber, Big Valley. 1274 Comment
  CHSC115589  Amaranthus blitoides Lowell Ahart; John Dittes 2015-7-14 20324 Lassen On the edge of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1264 Comment
  CHSC113078  Amaranthus californicus Lowell Ahart; John Dittes 2013-7-22 18860 Lassen Bottom of a dry bare drainage, 50 yards west of the road levee, about 250 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC71844  Amaranthus powellii Vernon Oswald; Lowell Ahart 1998-9-8 9570 Lassen Hwy 299 at the RR overpass on the east side of Nubieber. 1255 Comment
  SJSU13939  Ambrosia acanthicarpa N. A. Hopkins 1986-8-28 1378 Lassen by County Road 33 (Scott Road), lower Long Valley, N of Highway 70 & E of Beckwourth Pass Comment
  UCD143900  Ambrosia acanthicarpa Richard R. Halse 2010-8-26 8089 Lassen along State Highway 70 at Beckwourth Pass around 4.3 miles west of its junction with US Highway 395 or 1.6 miles east of Sierra Valley. 1584 Comment
  SEINET10931749  Amelanchier gracilis Jeffrey Huber 1971-6-11 Huber 331 Lassen 1 mile w of westwood, on cal hwy 36, scattered pinus ponderosa, pseudotsuga Menziesii, arctostaphylos, and ceanothus, all volcanic soils, rather flat and Arid Comment
  CAS-BOT-BC142537  Amelanchier utahensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49160 Lassen Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  CAS-BOT-BC142540  Amelanchier utahensis Gary Schoolcraft 1984-6-5 1203 Lassen Upper Spencer Basin, 29-16-24 1889 Comment
  UC726025  Amelanchier utahensis A. A. Heller 1938-6-4 15144 Lassen about 1 mi e Fredonyer Pass 1706 Comment
  UCD146584  Amphiscirpus nevadensis Richard R. Halse 2010-8-25 8087 Lassen along State Highway 139 around 26.2 miles north of Susanville on the northeast shore of Eagle Lake. 1559 Comment
  CAS-BOT-BC222255  Amsinckia John Thomas Howell 1934-6-10 11870 Lassen Honey Lake Valley, 24 miles s. of Susanville Comment
  UCD169449  Amsinckia menziesii Lowell Ahart; John Dittes 2005-6-1 11899 Lassen 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, east side of the railroad underpass, on the north side of Scott Road. 1459 Comment
  JEPS124575 Image available Amsinckia menziesii Rechen 1964-6-30 84 Lassen 5 miles north of boundary edge of Modoc Nat. Forest on Lassen A-2 Road. Comment
  SEINET10455819  Amsinckia menziesii Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2582 Lassen 6 mi S of Adin; along CA Hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  UC1182224  Amsinckia menziesii var. menziesii Francia Chisaki 1956-5-31 891 Lassen 15.4 mi n Litchfield (on Hwy #395) Comment
  UC61145  Amsinckia tessellata var. tessellata Jos. Burtt Davy Lassen Honey Lake Valley Awadee Comment
  CHSC5192  Anaphalis margaritacea 1944-7-19 Lassen Juniper Lake. 2055 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
  POM82276  Angelica breweri Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 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
  JEPS29744  Anisocoma acaulis Rimo Bacigalupi and L. R. Heckard 1962-5-29 8499 Lassen 2.7 mi n of Milford, along US Hwy 395 1219 Comment
  CHSC66232  Antennaria argentea Vernon H. Oswald; Lowell Ahart 1996-6-24 7837 Lassen Forest Rd. 31N63 ca. 0.2 mi S of the spur road to the cabins at Papoose Mdws., ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1644 Comment
  CAS-BOT-BC63952  Antennaria argentea H. D. Ripley; R. C. Barneby 1944-5-29 5958 Lassen Susanville Comment
  CAS-BOT-BC59220  Antennaria dimorpha James Jokerst 1983-5-31 1792 Lassen Grasshopper Valley Quad. Near Madeline Plains 1583 Comment
  HSC68156  Antennaria dimorpha J. P. Smith, J. O. Sawyer 1971-5-23 4657 Lassen Along Hwy. 139, 23 miles south of junction with road to Thermo. Comment
  UC1137285  Antennaria dimorpha K. E. Bradshaw 1939-5-27 244 Lassen near s end of Black Mt. Experimental Forest; Lassen National Forest, Halls Flat Quad., Thompson Meadow 1737 Comment
  CAS-BOT-BC59219  Antennaria dimorpha Ellsworth Bethel 1923-4-21 s.n. Lassen Fall River Mills Comment
  CAS-BOT-BC69138  Antennaria geyeri Milo S. Baker 1894-7-12 s.n. Lassen Pine Creek Comment
  CHSC105248  Antennaria geyeri Lowell Ahart; John Dittes 2010-7-31 16974 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  RSA416687  Antennaria geyeri J. T. Howell 1934-7-9 12520 Lassen Pine Creek Flat Comment
  UC773955  Antennaria geyeri L. R. Short and Wm. Gansberg 1936-7-3 S- 475 Lassen Burgess Spring Experiement Range 1828 Comment
  CAS-BOT-BC69140  Antennaria geyeri Clarence R. Quick 1964-7-29 64 -89 Lassen Blacks Mt. Experimental Forest 1798 Comment
  HSC82217  Antennaria luzuloides Thomas W. Nelson, Jane P. Nelson 1980-7-6 6000 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  JEPS107290  Antennaria luzuloides Lowell Ahart, John Dittes 2005-6-1 11862 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UC1609101  Antennaria luzuloides Vernon H. Oswald and Lowell Ahart 1993-6-14 5527 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach on W shore of lake (ca 2.0 mi ene of Spaulding Tract Rd. (Rd 518, 33N89), upper beach between road and lake); Eagle Lake 1566 Comment
  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
  UC1523723  Antennaria rosea Gary Schoolcraft 1982-8-10 865 Lassen se of, along Hwy 139 Adin 1584 Comment
  UC1609112  Antennaria rosea Vernon H. Oswald and Lowell Ahart 1993-6-14 5506 Lassen Lassen A21 (32N02) 2.1 mi e Lassen 105 (32N28Y) (se side of valley, ca 8 air mi w of Eagle Lake); Pine Creek Valley 1728 Comment
  RSA125375  Anthoxanthum aristatum P. H. Raven, Otto T. Solbrig 1958-6-16 13228 Lassen 4.5 miles east of Westwood on Hwy 36 Comment
  CHSC4823  Apocynum androsaemifolium R. Carter 1967-7-21 624 Lassen Ca. 3 mi n of highway 395 on rd through Jonesville on e side of rd. Dramond Mountains. Comment
  CDA39744  Apocynum androsaemifolium Taylor 1938-7-18 s.n. Lassen Susanville. 0 Comment
  HSC69617  Apocynum androsaemifolium Gary Schoolcraft 1979-7-21 81 Lassen Little Spencer Basin 183 Comment
  SEINET12319576  Apocynum pumilum Unknown 1978-1 48 Lassen Colman Lake, several mi SE of Eagle L., T31N R11E sec27 1963 Comment
  POM75751  Apocynum pumilum var. rhomboideum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  UC306926  Aquilegia formosa Marcus E. Jones 1897-6-28 Lassen Susanville, Perkin's Ranch Diamond Mt. 1828 Comment
  NY119576  Arabis arcuata W. W. Eggleston 1911-5-29 6727 Lassen Vicinity of Doyle Station 1290 Comment
  SEINET10480742  Arabis drummondii Jeffrey Huber 1971-6-2 Huber 125 Lassen Ca 30 mi n of susanville, on state hwy 139, in basatl. Pinus-artemesia-juniper Association. 1646 Comment
  SEINET228463  Arabis holboellii var. pinetorum Reed C. Rollins, Kathryn W. Rollins 1981-5-31 81176 Lassen Just north of Eagle Lake. Comment
  HSC30184  Arabis holboellii var. retrofracta D. H. Norris, S. Dowty, T. Nelson 1971-6-22 19199 Lassen Harvey Valley near Cone Springs Comment
  RSA516394  Arabis holboellii var. retrofracta Barbara Ertter, Gary Schoolcraft 1987-6-16 7174 Lassen Skeeadaddle Mtns on the NE side of Honey Lake. E side of road over saddle on W side of range. 1646 Comment
  SEINET3899870  Arabis holboellii var. retrofracta Reed C. Rollins, Kathryn W. Rollins 1981-5-31 81177 Lassen Just north of Eagle Lake.; 0 Comment
  NY119620  Arabis sparsiflora var. subvillosa R. C. Rollins 1981-5-31 81178 Lassen Just north of Eagle Lake Comment
  NY119631  Arabis suffrutescens G. Schoolcraft 1983-6-29 1038 Lassen Coulthurst Flat area, 34-10-27 SW 1889.8 Comment
  CAS-BOT-BC409988  Arceuthobium campylopodum Louella Bass 1973-5-29 EU 48 Lassen Elysian Valley 1325 Comment
  UC1037287  Arceuthobium campylopodum Leo Whitney 1934-7-15 1703 Lassen ca 15 mi w Eagle Lake; Lassen National Forest, Crater Mtn Comment
  CDA6788  Arctium minus T. C. Fuller 1959-7-7 4725 Lassen Highway 395 at Secret Creek Bridge, 3.3 miles north of road to Karlo. 0 Comment
  CAS-BOT-BC45910  Arctostaphylos nevadensis Hans Leschke 1957-7-12 s.n Lassen Above Cold Boiling Lake 2316 Comment
  CHSC5245  Arctostaphylos nevadensis M. West 1946-7-12 Lassen Eagle Lake. Silver Lake. 1981 Comment
  UC21853  Arctostaphylos nevadensis M. S. Baker and Frank Nutting 1894-1 Lassen Comment
  SD43498  Arctostaphylos patula Philip A. Munz 1947-5-18 11865 Lassen Fredoyner Forestry Public Campground, W of Susanville 1509 Comment
  CHSC7703  Arctostaphylos patula subsp. gankinii Beverley J. Wise 1969-5-9 41 Lassen 11 mi. west of Susanville on Forest Serv. Rd. 8246 off Hwy 36. 1524 Comment
  CHSC25747  Arctostaphylos patula subsp. patula John Steiner 1977-6-14 73 Lassen Lassen Volcanic National Park. 250 m NE Manzanita Lake and 250 m E Lassen Park boundry. 1768 Comment
  UC465891  Arenaria congesta var. subcongesta Franklin P. Nutting Lassen Dixey Valley 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
  UC1523778  Arenaria serpyllifolia subsp. serpyllifolia Gary Schoolcraft 1981-6-9 441 Lassen s Pittville Comment
  CAS-BOT-BC401791  Argemone munita subsp. rotundata Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16352 Lassen 4.5 mi. E. of Susanville Comment
  RSA11786  Argemone munita subsp. rotundata Elmer I. Applegate 1921-9-4 3345 Lassen Hills north of Susanville Comment
  UC1776710  Arnica chamissonis G. Schoolcraft 1997-8-1 2385 Lassen About 2 miles W of Boot Lake 2255 Comment
  CAS-BOT-BC82115  Arnica chamissonis Parkison 1916-7-21 36 Lassen Lassen Forest, Harvey Valley 1676 Comment
  CAS-BOT-BC82311  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mile east of Fredonyer Pass on Highway #36 1706 Comment
  CAS-BOT-BC82313  Arnica cordifolia Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville, Perkin's Ranch 2133 Comment
  JEPS94480  Arnica cordifolia Vernon H. Oswald and Lowell Ahart 1997-5-27 8527 Lassen 5.4 mi ne of Highway 139 0.4 mi e of its junction with the road to Shingle Mill Spring (n of Susanville on Forest Route 38N04); Forest Route 38N04 1798 Comment
  JEPS109911  Arnica fulgens Dean W. Taylor 2007-6-14 20128 Lassen Upper Gooch Valley, Forest Road 35N05 (County Road 22) 0.3 miles north of junction with Forest Road 34N45 1889 Comment
  CAS-BOT-BC82713  Arnica longifolia Clarence R. Quick 1962-6-18 62 -16 Lassen Road 21, Blacks Mountain E.F. Hdqrts., east of Halls Flat, north of Poison Lake Comment
  UCD129144  Arnica sororia G. Schoolcraft 1994-6-9 2298 Lassen Ash Valley RNA between Adin and Madeline, CA. 1600 Comment
  UCD35734  Artemisia arbuscula Beecher Crampton 1960-6-20 5735 Lassen Grass Valley ca. 4 miles southeast of Black's Mtn. Exper. Station USDA. 1676 Comment
  CAS-BOT-BC85002  Artemisia arbuscula subsp. arbuscula James Vale; Keith Wagnon; Walter Knight; Irja Knight 1981-5-20 4117 Lassen 81 miles south of Alturas in Lassen County. Comment
  UC1137582  Artemisia arbuscula subsp. arbuscula A. Simontacchi 1940-9-16 947 Lassen 1.3 mi ne of Ebey Lake; Lassen National Forest, Halls Flat Quadrangle 1691 Comment
  UC1119577  Artemisia cana subsp. bolanderi A. Simontacchi 1940-9-16 948 Lassen 1.3 mi ne Ebey Lake; Lassen National Forest, Halls Flat Quadrangle Comment
  UC29681  Artemisia douglasiana M. S. Baker and Frank Nutting 1894-1 Lassen Bridge Creek Comment
  UC1776685  Artemisia ludoviciana subsp. ludoviciana G. Schoolcraft 1999-8-11 2878 Lassen East edge of Madeline Plains E of Ravendale, CA 1627 Comment
  CHSC13797  Artemisia tridentata Cathy Crittenden 1970-7-8 28 Lassen Approx. 100 yds north of E. L. B. S. 1524 Comment
  UC29711  Artemisia tridentata J. Burtt Davy Jun 17 1897-Jun 24 1897 3343 Lassen Honey Lake Valley Comment
  CHSC66846  Artemisia tridentata subsp. tridentata Vernon H. Oswald 1996-10-3 8294 Lassen Modoc Plateau. Hwy. 395 N of Susanville between Litchfield and Ravendale, 10.4 mi N of Smoke Creek Ranch Rd. 1402 Comment
  RSA647532  Artemisia tridentata subsp. tridentata Marion P. Harthill 1972-6-16 793 Lassen Doyle Comment
  UC773962  Artemisia tridentata subsp. vaseyana L. R. Short 1936-9-30 S- 505 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1752 Comment
  UC1123518  Asclepias cordifolia C. W. Hanks 1934-9-26 93 Lassen near Plumas National Forest (w side of valley); Sierraville Quadrangle, Long Valley Comment
  CHSC105766  Asclepias fascicularis Nick Otting 2005-7-28 Lassen Five Springs Creek, downstream from Five Springs. 1356 Comment
  CHSC60269  Asclepias fascicularis P. V. Caldwell 1972-6-24 298 Lassen Rocky beach off road to beach near the tunnel at Eagle Lake B. S. Comment
  SEINET178457  Asclepias fascicularis Unknown 1897-6-25 Lassen Susanville 1341 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
  RSA712643  Aster campestris L. P. Janeway 2005-7-31 8514 Lassen Northern High Sierra Nevada. Diamond Mountains; Head of large flat dry meadow at head of Bird Creek; 0.8 km northeast of Meadow View Peak. 1960 Comment
  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
  CHSC12949  Astragalus K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-22 5811 Lassen Ca. 16.5 mi w of Madeline, on Madeline-Adin Road. 1548 Comment
  CHSC69211  Astragalus James D. Jokerst 1991-5-28 3299 Lassen Modoc Plateau. Junction Hwy. 395 with Hwy. 36 SE of Susanville, E side of road 150 ft S of junction. 1280 Comment
  POM45145  Astragalus accidens var. hendersonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1524 Comment
  NY790903  Astragalus agrestis R. M. Austin 06 1898 2211 Lassen Madaline Plains Comment
  CAS-BOT-BC177438  Astragalus andersonii Alice Eastwood; John Thomas Howell 1940-6-16 8351 Lassen Omira Comment
  CHSC106586  Astragalus andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  JEPS107970  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
  NY791376  Astragalus andersonii W. W. Eggleston 1911-5-29 6734 Lassen Vicinity of Doyle Station 1290 Comment
  UC84393  Astragalus andersonii T. Brandegee 1892-6-30 Lassen Janesville Comment
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Oct 22 2007
  NY791374  Astragalus andersonii LeDoux 1973-5-24 861 Lassen Collected at jct. of Highways 70 and 395 at Arco Station. Comment
  SEINET5323325  Astragalus andersonii M. J. Williams 1974-8-4 L- 74 -83 Lassen west of Hwy 395, near Hwy 70 in former burn area 1494 Comment
  UC1483838  Astragalus anxius G. Schoolcraft 1980-8-14 307 Lassen w of Madeline; Ash Valley 1548 Comment
  RSA362358  Astragalus argophyllus var. argophyllus A. Tiehm, Gary Schoolcraft 1986-5-12 10347 Lassen 1 road mile west of the state line on dirt road from highway 395 to Smoke Creek, south side of Rush Creek. 1341 Comment
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Aug 12 2008
  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
  RSA415412  Astragalus canadensis var. brevidens Rockwell 1925-7-1 s.n. Lassen Eagle Lake 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
  SEINET12162068  Astragalus curvicarpus K. R. Stern 1974-1 5816 Lassen 16.5 mi W of Madeline, on Madeline-Adin Rd. Likely Quadrangle, sec. 32, R11E T35N 1548 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
  JEPS87396  Astragalus curvicarpus var. curvicarpus Vernon H. Oswald and Lowell Ahart 1993-7-8 5662 Lassen Pittville Rd. (Lassen 111,36N01) 1.9 mi n of Hwy 44 on the se edge Poison Lake; se edge Poison Lake 1709 Comment
  NY803535  Astragalus curvicarpus var. curvicarpus M. J. Williams 1973-5-12 73-C- 16 Lassen Near Herlong Turn from Highway 395 1250 Comment
  CAS-BOT-BC182958  Astragalus filipes H. D. Ripley; R. C. Barneby 1943-6-15 5759 Lassen East of Viewland 1310 Comment
  JEPS125804  Astragalus filipes William Harnach 2010-6-8 1244 Lassen Honey Lake Valley, NE of Doyle, 2 miles west of the Nevada state line on Fort Sage Road. Comment
  RSA768028  Astragalus filipes L. Ahart, John Dittes 2010-7-31 16976 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
  UC1583579  Astragalus filipes G. Schoolcraft 1990-6-13 2093 Lassen in John's Valley about 4 mi s Nubierber; s of Nubieber in John's Valley 1371 Comment
  UC1924595  Astragalus filipes Debra Valov 2006-5-28 2006005 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1284 Comment
  UC81430  Astragalus filipes T. S. Brandegee 1892-6-26 Lassen Milford 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
  SEINET5325729  Astragalus filipes M. J. Williams 1983-7-31 83- 125 -1 Lassen Ash Valley road, 17 mi from Aden. 1829 Comment
  CAS-BOT-BC186862  Astragalus gibbsii Philip A. Munz 1947-5-20 11889 Lassen Milford 1264 Comment
  CDA19718  Astragalus gibbsii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat. 1341 Comment
  POM24783  Astragalus gibbsii Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  UC1924237  Astragalus gibbsii Debra Valov 2004-6-8 2004253 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1270 Comment
  CAS-BOT-BC186866  Astragalus gibbsii H. D. Ripley; R. C. Barneby 1944-5-29 5951 Lassen Constantin 1371 Comment
  RSA111016  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 5749 Lassen West of Susanville 1311 Comment
  SEINET3165897  Astragalus inversus R. W. Spellenberg 2006-6-19 13744 Lassen along USFS access road 3.4 km E of Calif. Hwy. 139, the jct. of the road and highway 31 km SE of Modoca Co. line (just S of Adin) 1670 Comment
  SEINET5324147  Astragalus iodanthus var. iodanthus A. Tiehm 1980-1 5755 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1231 Comment
  CAS-BOT-BC229049  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  UC13384  Astragalus lemmonii M. S. Baker and F. Nutting 1894-7-2 Lassen Dixey Mts. Comment
  UCD55267  Astragalus lentiginosus Ellen Dean 2006-5-15 3065 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1249 Comment
  CAS-BOT-BC187155  Astragalus lentiginosus var. chartaceus H. D. Ripley; R. C. Barneby 14 Jun. 5744 Lassen Hidden Valley E of Susanville 1310 Comment
  UC13383  Astragalus lentiginosus var. floribundus L. T. Stephenson Sep 1897 Lassen Chat , Chat (Sierra Valley) Comment
  POM204048  Astragalus lentiginosus var. lentiginosus J. T. Howell 1934-7-6 12437 Lassen Harvey Valley Comment
  RSA754374  Astragalus lentiginosus var. lentiginosus Brian Knaus 2005-6-14 137 Lassen NE corner of Poison lake. ASLElE-12 1685 Comment
  RSA754376  Astragalus lentiginosus var. lentiginosus Brian Knaus 2005-6-14 136 Lassen W of Susanville, at junction of hihways 26 and 44. 1502 Comment
  POM280735  Astragalus lentiginosus var. salinus Alice Eastwood, John T. Howell 1940-6-16 8335 Lassen Near Susanville. Comment
  CAS-BOT-BC187560  Astragalus malacus B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6551 Lassen Just S of Ravendale 1580 Comment
  RSA584731  Astragalus malacus Bruce Bartholomew, M. Gilbert, L. Skog 1993-5-13 6551 Lassen Just S. of Ravendale. 1580 Comment
  UCD55300  Astragalus malacus Ellen Dean; Gary Schoolcraft 2006-5-16 3121 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1251 Comment
  UC13459  Astragalus obscurus M. S. Baker and Frank Nutting 1894-7-2 Lassen Dixey Mts. Comment
  UC1128861  Astragalus pulsiferae E. Sawyer 1935-6-27 237 Lassen Long Valley Sierraville Quad., Long Valley Comment
  CHSC98309  Astragalus pulsiferae var. coronensis R. Ondricek-Fallscheer 2003-6-7 210 Lassen About 27 air mi NE of Susanville, 9 air mi SSE of Ravendale, and 0.5 air mi NW of Rye Patch Springs; 0.5 mi E of Hwy 395 and 150 ft. N of road to Ramhorn Springs Campground. 1615 Comment
  JEPS109744  Astragalus pulsiferae var. coronensis Dean W. Taylor 2005-6-29 19379 Lassen Piute Creek, 3 mi W from western edge Susanville 1310 Comment
  NY694120  Astragalus pulsiferae var. coronensis N. H. Holmgren 1980-7-4 9500 Lassen Observation Peak, south side of mountain, 18 km (11 mi) airline distance east of Ravendale 1890 Comment
  SEINET240400  Astragalus pulsiferae var. coronensis S. L. Welsh, ND Atwood 2001-6-14 28150 Lassen E of Hwy 395, road to Rams Horn Spring campground 1540 Comment
  CAS-BOT-BC192855  Astragalus pulsiferae var. pulsiferae G. Schoolcraft 1989-6-7 1906 Lassen East slope of Shaffer Mtn. Comment
  NY694131  Astragalus pulsiferae var. pulsiferae A. A. Heller 1907-7-1 8674 Lassen Near Old Chat Comment
  UC372929  Astragalus pulsiferae var. pulsiferae Marcus E. Jones, A. M. 1897-6-19 Lassen Chat 1615 Comment
  CHSC57280  Astragalus purshii var. lagopinus Mary Meyer 1980-7-14 Lassen Ash Valley. 1524 Comment
  CAS-BOT-BC194094  Astragalus purshii var. purshii Clare B. Hardham 7446 Lassen Diamond Peak 2286 Comment
  UC13464  Astragalus purshii var. tinctus M. S. Baker and Frank Nutting 1894-6-30 Lassen Big Valley Comment
  UC604677  Astragalus purshii var. tinctus Farris Farris 1935-5-20 Lassen three mi sw Susanville; sw of Susanville 1310 Comment
  UC82576  Astragalus spaldingii unknown 1892-6-22 Lassen Honey Lake Comment
  JEPS94456  Astragalus whitneyi var. confusus Vernon Oswald and Lowell Ahart 1997-6-24 8634 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
  CHSC5284  Astragalus whitneyi var. siskiyouensis V. Holt 1945-6-1 Lassen Eagle Lake. Comment
  UC1561813  Astragalus whitneyi var. siskiyouensis Barbara Ertter with Gary Schoolcraft 1987-6-16 7183 Lassen open rhyolitic ridge w Hot Springs VABM (Skeedaddle Mountains on ne side of Honey Lake); Skeedaddle Mountains, ne side Honey Lake,l w of Hot Springs 2133 Comment
  UC1567401  Astragalus whitneyi var. whitneyi G. Schoolcraft 1989-6-19 1915 Lassen Ash Valley RNA/ACEC 1554 Comment
  RSA38479  Athysanus pusillus P. A. Munz 1947-5-18 11863 Lassen Fredonyer Forestry Public Camp Ground. W of Susanville. 1509 Comment
  NY652203  Atriplex argentea var. hillmanii G. Schoolcraft 1989-5-16 1874 Lassen West of Highway 395 about 2 miles south of Karlo turnoff 1356.4 Comment
  CAS-BOT-BC170276  Atriplex confertifolia C. B. Wolf 1931-9-5 1279 Lassen Honey Lake Valley, 1/2 mile from Medee R.R. Station on road to Doyle. 1219 Comment
  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
  UC7062  Atriplex confertifolia J. Burtt Davy Jun 17 1897-Jun 24 1897 3274 Lassen Honey Lake Valley 1219 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
  JEPS95903  Atriplex prostrata Lowell Ahart 1999-9-13 8209 Lassen just south of the parking area; about 1 mile south of the sign in station; Honey Lake Wildlife Area; 5 1/2 miles (air) southeast of Standish 1207 Comment
  CHSC65305  Atriplex rosea Vernon H. Oswald; Lowell Ahart 1995-8-14 7174 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
  RSA122664B  Avena sativa A. Simontacchi 1940-6-13 854 Lassen 3.4 miles W.S.W. of Patterson Mtn.; Halls Flat 1738 Comment
  CHSC71070  Balsamorhiza hirsuta Vernon H. Oswald; Lowell Ahart 1998-5-22 9089 Lassen Hwy. 36 between Fredonyer Summit and Susanville, 0.4 mi west of the Susan River and Bizz Johnston Trail. 1417 Comment
  CAS-BOT-BC106485  Balsamorhiza hookeri Helen K. Sharsmith 1955-6-22 4501 Lassen Warner Mountains, Modoc National Forest - Five miles beyond Blue Lake on road to Likely 1767 Comment
  UC1368790  Balsamorhiza hookeri John L. Strother 1970-5-23 957 Lassen 6 mi n Honey Lake 1280 Comment
  UC579779  Balsamorhiza hookeri David D. Keck and J. Clausen 1935-6-24 3747 Lassen 2 mi s of Ravendale 1464 Comment
  SEINET10924971  Balsamorhiza hookeri Billy Joe Cox 1971-6-2 Cox 3265 Lassen Approx. 2 mi. N of Susanville, across CA Hwy. 139 from Lassen Jr. College, in grassland at edge of Jeffery Pine & Artemisia. 1341 Comment
  UCD129523  Balsamorhiza hookeri Geo C. Wood 1940-4-18 s.n. Lassen Coffin Ranch near Susanville. Comment
  CHSC54172  Balsamorhiza macrolepis var. platylepis Vernon H. Oswald 1991-5-28 4622 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. 1264 Comment
  CAS-BOT-BC16438  Barbarea orthoceras A. M. Vollmer; L. Beane 1953-7-1 72 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  JEPS114368  Barbarea orthoceras Lowell Ahart, John Dittes 2008-6-20 14949 Lassen In meadow, about 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  NY119712  Barbarea orthoceras var. dolichocarpa J. T. Howell 1973-6-28 49464 Lassen Elysian Valley, W of Janesville 1325.9 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
  SJSU4353  Beckmannia syzigachne J. W. Tilden 1960-6-27 1526 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  CHSC110167  Berberis aquifolium var. aquifolium V. Lockie 2010-5-1 Lassen Location: Just off of Highway 139, east side of road, approx. 8.25 miles NE of Susanville, CA on Antelope Mountain. 1630 Comment
  CHSC96767  Berteroa incana D. McDonald 2005-7-18 1307852 Lassen Modoc Plateau. Lassen County. Hallelujah Junction. Comment
  SEINET11193808  Berteroa incana W. Harnach 2006-5-31 1229 Lassen Long Valley, Anderson Ranch, Scott Road, ca 5.5 miles N of Hwy 70. 1457 Comment
  CHSC66844  Berula erecta Vernon H. Oswald 1996-9-21 8285 Lassen Modoc Plateau. Ca. 3 mi W of Hwy. 139 on the road to Eagle Lake Biological Station, ca. 10 mi (air) N of Susanville. 1508 Comment
  UC1191930  Berula erecta Malcolm A. Nobs, S. Galen Smith 1949-8-20 1487 a Lassen 1 mi s of Doyle (Long Creek); Long Creek Comment
  HSC95181  Betula glandulosa Gordon Leppig 1998-7-12 957 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1594641  Betula glandulosa Vernon H. Oswald and Lowell Ahart 1992-7-16 5116 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
  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
  CHSC117276  Bidens cernua Lowell Ahart; John Dittes 2016-7-15 21225 Lassen On the west side of the road about 600 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC60760  Bistorta bistortoides Vernon H. Oswald; Lowell Ahart 1993-6-3 5484 Lassen Champs Flat Rd. (Lassen 105), Forest 32N28Y), 2.4 mi N of its junction with Lassen 21 (32N02) to Eagle Lake, on the W edge of Pine Creek Valley, between Poison Lake and Susanville. 1728 Comment
  CAS-BOT-BC413002  Bistorta bistortoides L. G. Bennett 1967-7-14 174 Lassen 5.3 miles from the junction of Highway 44 and the Silver Lake rd. on Highway 44 1950 Comment
  CAS-BOT-BC127972  Blepharipappus scaber Ella Dales Cantelow 1941-5-22 3551 Lassen U. S. Hy 395 n. of Litchfield 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
  UC1393121  Blepharipappus scaber John L. Strother 1970-5-23 953 Lassen 6 mi n of Honey Lake 1280 Comment
  CAS-BOT-BC127955  Blepharipappus scaber Dr. Jean Linsdale 1929-6-9 s.n. Lassen Pete's Valley Comment
  CAS-BOT-BC128038  Blepharipappus scaber C. L. Hitchcock 1940-5-26 6612 Lassen lava beds ca. 12 miles north of Fall River Mills on Fall River 1371 Comment
  CAS-BOT-BC128047  Blepharipappus scaber B. J. Hammerly 1941-6-21 49 Lassen Dry plateau 8 mi. SE. of Likely on Blue Lake road Comment
  SEINET7379359 Image available Blepharipappus scaber subsp. scaber J. A. Young 1982-6-9 s.n. Lassen Myers Ranch, Adin 1372 Comment
  UC1609118  Boechera Vernon H. Oswald and Lowell Ahart 1993-6-14 5546 Lassen ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd (Lassen A1) at Sandy Beach on w shore of Eagle Lake, n side of rd); Eagle Lake 1566 Comment
  UC2046023  Boechera lincolnensis Barbara L. Wilson with Richard Brainerd, Danna Lytjen, Bruce Newhouse and Nick Otting 2004-8-24 11189 Lassen Snowstorm Creek, at a spring; upstream of Biscar Reservoir, west of an old railroad right of way. Comment
  CHSC101060  Boechera puberula John Dittes 2008-5-22 1532 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 350 feet north by northeast of intersection of Hwy 139 and FS Road 36N02; open, volcanic outcrop on northeast side of Willow Creek. 485 Comment
  CHSC75356  Boechera puberula Vernon H. Oswald 1999-5-7 9725 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the S side of the trail just E of Devils Corral Trailhead. 1420 Comment
  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
  CAS-BOT-BC14718  Boechera repanda Clare B. Hardham 1969-8-28 17444 Lassen West of Janesville. Comment
  CAS-BOT-BC25506  Boechera retrofracta A. M. Vollmer; L. Beane 1953-7-1 40 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur. 1554 Comment
  CAS-BOT-BC25512  Boechera retrofracta John Thomas Howell; Gordon H. True 1973-7-31 50039 Lassen Sierra Nevada. Diamond Range on road from Janesville to Thompson Peak. 1737 Comment
  JEPS107792  Boechera retrofracta Lowell Ahart, John Dittes 2005-6-2 11926 Lassen 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
  SEINET12627116 Image available Boechera retrofracta Martin Schilling 2013-1 MS 257 Lassen Hat Creek overlook area, off Hwy 44, 2.86 air mi E of Sugarloaf Peak, 5 air mi NE of Hat Creek Hill, on W-facing slope, between rocks 1500 Comment
  SEINET3165698  Boechera retrofracta R. W. Spellenberg 2006-6-19 13743 Lassen along a USFS access road 2 km E of Calif. Hwy 139, the junction of road and highway 31 km SE of Modoc Co. line (just S of Adin) 1715 Comment
  CHSC106675  Boechera sparsiflora B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CAS-BOT-BC25707  Boechera sparsiflora H. D. Ripley; R. C. Barneby 1943-6-13 5702 Lassen South of Gifford. 1569 Comment
  CAS-BOT-BC25900  Boechera suffrutescens John Thomas Howell 1934-7-10 12537 Lassen Between Harvey Valley and Patterson Flats. Comment
  CHSC76305  Bolboschoenus maritimus subsp. paludosus Lowell Ahart; Vernon H. Oswald 1999-9-13 8221 Lassen On the edge of a flooded field, just south of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  HSC16160  Brasenia schreberi Fred J. Kindel 1955-7-14 Lassen Mt. Meadows Reservoir Comment
  CHSC92737  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
  CHSC63436  Bromus briziformis Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6308 Lassen Blue Door Flat on Clarks Valley Rd. (Lassen 510) ca. 7 mi E of Madeline. 1767 Comment
  UCR67017  Bromus briziformis George K. Helmkamp 1990-9-23 D- 11 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  CAS-BOT-BC149585  Bromus carinatus var. carinatus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville. Perkin's Ranch. 1463 Comment
  CDA31386  Bromus carinatus var. carinatus D. R. Hill 1968-7-8 Lassen James R. Reynolds ranch, Revendale. 0 Comment
  UC1136818  Bromus carinatus var. carinatus L. R. Short and J. Warren 1936-6-29 S 460 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1820 Comment
  UC1024682  Bromus ciliatus Leo Whitney 1934-7-26 2164 Lassen 7-8 mi sw of Eagle Lake (near Bridge Creek, Lassen National Forest, Bridge Creek Camp); Lassen National Forest, Bridge Creek Camp 1737 Comment
  RSA715540  Bromus ciliatus var. ciliatus L. Ahart 2005-6-1 11865 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
  UCD58854  Bromus inermis John Thomas Howell; Gordon H. True 1973-8-1 50221 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. 2164 Comment
  RSA126867  Bromus marginatus G. A. Fischer, I. H. Johnson 1933-7-12 F 231 Lassen Patterson Flat. Lassen Forest. Comment
  UC1024917  Bromus racemosus Leo Whitney 1935-6-28 3361 a Lassen Bieber Comment
  UC53747  Bromus secalinus J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley 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-BC161419  Bromus tectorum John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49199 Lassen Sierra Nevada. Elysian Valley, northwest of Janesville. 1325 Comment
  RSA126830  Bromus tectorum H. S. Yates 1937-5-12 6085 Lassen McKenzie Meadow; Susanville 1524 Comment
  UC1024827  Bromus tectorum Leo Whitney 1935-7-12 3233 Lassen Lassen National Forest, Camp 10, Fruit Grower's Supply Company Lassen National Forest; , Camp 10, Fruit Grower's Supply Compa Comment
  UC1131328  Bromus tectorum A. Simontacchi 1940-5-28 783 Lassen 3.2 mi wsw of Patterson Mountain (Lassen National Forest); Lassen National Forest 1767 Comment
  UC1137129  Bromus tectorum August L. Hormay 1932-5-20 Lassen Lassen National Forest, Hat Creek Hat Creek; Lassen National Forest, Hat Creek Comment
  UC1924566  Bromus tectorum Debra Valov 2006-5-28 2006038 Lassen Bieber off County Rd. A2 ca 12 km east of Hwy 299 1279 Comment
  SEINET10515052  Bromus tectorum Paul Gallian, David B. Dunn 1971-6-2 Gallian 522 Lassen 6 mi n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  POM312337  Callitriche verna Verne Grant, H. L. Mason 1947-7-9 13294 Lassen 5 miles E of Bieber. Comment
  CAS-BOT-BC80347  Calocedrus decurrens Ralph K. Gierisch 1968-7-12 3357 Lassen Lassen Forest, Hwy 36 1 mile east of Fredonyer Pass 1706 Comment
  CHSC6217  Calocedrus decurrens P. Balch 1955-7-18 Lassen Willow Creek, Eagle Lake. 1463 Comment
  CHSC118825  Calochortus leichtlinii L. P. Janeway; B. Castro 2017-7-2 12339 Lassen Northern High Sierra Nevada. Along the crest of the Diamond Mtns 4.0 air-km west of Diamond Mtn; at the junction of Skyline Motorway, Diamond Mtn Road, and Diamond Mtn Motorway. 2004 Comment
  UC727118  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen e of Fredonyer Pass 1219 Comment
  JEPS124668 Image available Calochortus leichtlinii Laurel Loeblich 1964-6-30 59 Lassen Highway 139 8.7 miles north of Susanville. Comment
  POM253058  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen Along Highway 36 in the valley east of Fredonyer Pass Comment
  CHSC27637  Calochortus macrocarpus J. D. Prouty 1978-7-26 27 Lassen Gorilla's Roost to Stone's Ranch Rd., SE of Eagle L. 1584 Comment
  CHSC36458  Calyptridium monospermum Susan H. Euing 1982-6-5 12 Lassen Base of northeast slope, Gallatin Peak, approx. 1000 ft. from summit. Comment
  UC1137569  Calyptridium monospermum A. Simontacchi 1940-6-8 873 Lassen Lassen National Forest, Hall Flat Ranger Station Hall Flat Ranger Station; Lassen National Forest, Hall Flat Ranger Station 1706 Comment
  CHSC64890  Calyptridium umbellatum Vernon H. Oswald 1995-6-26 6938 Lassen Modoc Plateau. Gravel pit on the e side of Ash Valley Rd. (Lassen 527) 0.2 mi n of Spooner Rd. in Ash Valley. 1542 Comment
  UC852120  Calyptridium umbellatum A. A. Heller 1938-6-22 15139 Lassen 1 mi s of Westwood 1524 Comment
  UC1537347  Calyptridium umbellatum Gordon H. True Jr. 1936-6-25 534 Lassen Hall's Valley 1524 Comment
  RSA339996  Calystegia polymorpha Noel Holmgren, Patricia K. Holmgren, A. H. Holmgren 1980-7-9 9581 Lassen Surprise Valley, 23.7 km (14.7 mi) south of Fort Bidwell. 1402 Comment
  CAS-BOT-BC497556  Camassia quamash subsp. breviflora Ellsworth Bethel 1923-5-24 s.n. Lassen 12 miles from Poison Lake Comment
  POM253049  Camassia quamash subsp. breviflora A. A. Heller 1938-6-4 15140 Lassen 2 miles south of Westwood 1524 Comment
  RSA32023  Camassia quamash subsp. breviflora A. A. Heller 1938-6-4 15140 Lassen 2 miles south of Westwood 1494 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
  CHSC66238  Camelina microcarpa Vernon H. Oswald; Lowell Ahart 1996-6-24 7881 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 NE corner of the meadow (ca. 0.1 mi E of where Papoose Creek leaves the N end of the meadow). 1636 Comment
  CHSC93245  Camelina microcarpa John Dittes; Scott Chamberlain 2004-6-28 1019 Lassen Modoc Plateau; Long Valley; ca. 4.4 air-miles north by northeast of Hwy 70 at Beckwourth Pass, ca. 2.6 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; near road. 1465 Comment
  RSA339990  Camissonia andina Noel Holmgren, Patricia K. Holmgren 1980-7-5 9521 Lassen Lassen County: upper Smoke Creek drainage, 20.4km (12.7miles) from Hwy 395 via Rye Patch Canyon, 24km (15miles) airline distance SE of Ravendale 1585 Comment
  CHSC93568  Camissonia contorta Lowell Ahart; John Dittes 2005-6-2 11939 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the interesection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1600 Comment
  UC69560  Camissonia contorta J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Chat Honey Lake Valley, Long Valley Comment
  JEPS107854  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
  JEPS93828  Camissonia parvula Vernon H. Oswald and Lowell Ahart 1998-6-4 9141 Lassen s of Constantia (Red Rock Road at its junction with Highway 395); Red Rock Road 1365 Comment
  HSC86885  Camissonia tanacetifolia R. Carter 1967-6-23 547 Lassen Upper part of Murrer's Meadow Comment
  HSC22874  Camissonia tanacetifolia John Pratt 1970-6-13 6 Lassen 1677 Comment
  CAS-BOT-BC160835  Camissonia tanacetifolia subsp. quadriperforata John Thomas Howell 1934-6-10 11857 Lassen 3 miles n. of Omira Comment
  CAS-BOT-BC160879  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell; Gordon H. True 1973-8-1 50209 Lassen Headwaters of Baxter Creek. East slope of Diamond Range south of Susanville 2164 Comment
  RSA339989  Camissonia tanacetifolia subsp. tanacetifolia Noel Holmgren, Patricia K. Holmgren 1980-7-3 9477 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi.) west of U.S. Highway 395 from a turnoff 10.3 km (6.4 mi.) south of Madeline 1616 Comment
  CAS-BOT-BC160866  Camissonia tanacetifolia subsp. tanacetifolia A. R. Kruckeberg 1954-6-22 3322 Lassen Along roadbanks, 6 miles s. of Likely on Highway 395 Comment
  CHSC116087  Capsella bursa-pastoris Lowell Ahart; John Dittes 2015-7-13 20308 Lassen About 100 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  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
  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
  CHSC112408  Cardamine pensylvanica Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18729 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
  CHSC112417  Carex Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18770 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS120879  Carex Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18770 Lassen About 300-400 yards NW of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC89753  Carex abrupta L. P. Janeway 2004-6-26 8170 Lassen High Cascade Range. Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat; Blacks Mountain Experimental Forest. Roadside ditch. 1790 Comment
  JEPS63614  Carex angustata Leland S. Smith 1922-7-30 68 Lassen Martin Spring Meadow Lassen National Forest Comment
  UC142947  Carex angustata A. L. Hormay 1941-6-18 5 Lassen Little Harvey Valley Lassen National Forest, Little Harvey Valley 1676 Comment
  CAS-BOT-BC18104  Carex athrostachya John Thomas Howell 1973-7-10 49780 Lassen Sierra Nevada. Fredonyer Pass. 1737 Comment
  CAS-BOT-BC18106  Carex athrostachya T. C. Fuller 1980-8-5 20309 Lassen 28 km. (17.5 mi.) northeast of Ravendale. Campground on east shore of Dodge Reservoir. Stream adjacent to the boat ramp. Comment
  UC506936  Carex athrostachya George A. Fischer, Irwin H. Johnson 1933-7-12 F 237 Lassen Patterson flat 1737 Comment
  CHSC77241  Carex aurea G. Schoolcraft 1998-7-7 2755 Lassen Along Pine Creek NE. of Fredonyer Peak. 1645 Comment
  JEPS87494  Carex aurea Vernon H. Oswald and Lowell Ahart 1993-8-3 5742 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  SEINET13351078  Carex davyi B. L. Wilson, P. Zika 2011-8-7 16805 Lassen Highway 44 near mile post 12.50, at junction with road 32N22 and road to Harney Valley 1740 Comment
  CAS-BOT-BC20650  Carex douglasii John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49192 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  HSC66737  Carex douglasii J. P. Smith, J. O. Sawyer 1971-5-23 4664 Lassen Along Hwy. 139, 1 mi. S of jct. with road to Thermo Comment
  JEPS94486  Carex douglasii Vernon H. Oswald and Lowell Ahart 1997-5-27 8519 Lassen 2.6 mi ne of Highway 139 (Williams Reservoir on Forest Route 38MN04 between Highway 139 near Willow Creek Guard Station and Coyote Flat); Williams Reservoir, Forest Route 38MN04 1682 Comment
  UC1776677  Carex douglasii G. Schoolcraft 1995-5-22 2486 Lassen East of Skedaddle Ranch 1554 Comment
  HSC48223  Carex filifolia var. erostrata D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19171 Lassen Harvey Valley near Cone Springs Comment
  UC1133496  Carex filifolia var. erostrata A. Simontacchi 1940-5-17 729 Lassen 5.7 mi ssw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  SEINET7558601 Image available Carex filifolia var. erostrata Richard Driscoll 1965-5-31 s.n. Lassen Lassen. Bogard Ranger Sta., Harvey Valley, NW of Susanvile. 1707 Comment
  CAS-BOT-BC22236  Carex haydeniana John Thomas Howell 1934-6-14 12164 Lassen Near Lost Lake. Warner Mountains. 2438 Comment
  UCD140369  Carex haydeniana John Thomas Howell 1934-6-14 12163 Lassen near Lost Lake, Warren Mountains. Comment
  JEPS28382  Carex heteroneura George W. Gillett 1957-7-28 937 Lassen along s margin, Widow Lake Lassen Volcanic National Park, Widow Lake 2072 Comment
  CHSC85990  Carex heteroneura var. heteroneura L. P. Janeway 2003-7-24 7915 A Lassen High Cascade Range. Along Forest Service Road 30N14 1.1 km from Road 30N21; small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  JEPS63616  Carex hoodii Leland S. Smith 1922-7-18 78 Lassen Martin Springs Meadow, Lassen National Forest Comment
  HSC95183  Carex interior Gordon Leppig 1998-7-12 954 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC103667  Carex lemmonii Thomas W. Nelson, Jane Nelson 1985-8-10 8006 Lassen Along north side of Silver Lake 1829 Comment
  CHSC60433  Carex lenticularis var. impressa Mary Ann Showers 1992-6-13 2545 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  HSC103598  Carex leporinella Thomas W. Nelson, Jane Nelson 1985-8-10 8012 Lassen Along north side of Silver Lake campground 1829 Comment
  UC1136939  Carex mariposana L. R. Short and J. Warren 1936-6-9 S- 405 Lassen Burgess Spr. Exp. Range Lassen Forest 1844 Comment
  CHSC66411  Carex nebrascensis Vernon H. Oswald; Lowell Ahart 1996-6-17 7813 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau. On the edge of the trail at the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  CHSC85989  Carex nebrascensis L. P. Janeway 2003-7-24 7914 Lassen High Cascade Range. At lower end of a meadow and marsh along Bridge Creek 1.8 km north of Hwy 44, just northwest of the Cinder Pit. 1716 Comment
  CHSC99782  Carex nebrascensis Lowell Ahart; John Dittes 2007-6-20 15019 Lassen On wet soil or in shallow water on the north side of the levee, about 90 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber. 1260 Comment
  UC1142949  Carex nebrascensis A. L. Hormay 1941-6-18 7 Lassen Little Harvey Valley Lassen National Forest 1676 Comment
  HSC103614  Carex nebrascensis Thomas W. Nelson, Jane Nelson 1985-8-10 8005 Lassen Along north side of Silver Lake 1829 Comment
  JEPS28385  Carex pellita George W. Gillett 1957-7-26 906 Lassen e shore Butte Lake 200 yards beyond outlet; Lassen Volcanic National Park, Butte Lake 1844 Comment
  SEINET7570967 Image available Carex pellita George W. Gillett 1957-7-26 906 Lassen Lassen Volcanic National Park, Butte Lake, east shore 200 yards beyond the outlet. 1844 Comment
  JEPS106522  Carex petasata L. P. Janeway 2004-6-26 8139 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18 1714 Comment
  UC2031890  Carex petasata Nick Otting and Danna Lytjen 2003-7-14 675 Lassen Modoc Plateau, Willow Creek at Willow Creek Campground, 14 air miles south-southeast of Adin. Comment
  CAS-BOT-BC118399  Carex praegracilis John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49193 Lassen Elysian Valley, northwest of Janesville. 1325 Comment
  CHSC118476  Carex praegracilis Don Lepley 2015-6-16 Lassen Lassen National Forest. Eagle Lake Ranger District. Sandy Beach of Eagle Lake, ~1.6 air miles north of Spalding marina. 1559 Comment
  CAS-BOT-BC118739  Carex preslii John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49471 Lassen Elysian Valley, west of Janesville 1325 Comment
  CAS-BOT-BC118027  Carex rossii John Thomas Howell; Gordon H. True 1973-8-1 s.n. Lassen Headwater of Baxter Creek, Diamond Mts. 2164 Comment
  HSC48218  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19222 Lassen 2 mi. N of Westwood Comment
  HSC48221  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19176 Lassen Harvey Valley near Cone Springs Comment
  HSC48339  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19176 Lassen Harvey Valley near Cone Springs Comment
  HSC103634  Carex scopulorum var. bracteosa Thomas W. Nelson, Jane Nelson 1985-8-10 8028 Lassen Silver Lake, along north side of arm on east side of lake. 1829 Comment
  JEPS114623  Carex sheldonii Lowell Ahart, John Dittes 2008-6-22 15045 Lassen High dry bank of a levee, north of the old barn, east of the dirt road, open meadow area, in Big Valley, about 4.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.5 miles (air) northeast of Bieber 1267 Comment
  CAS-BOT-BC116606  Carex subfusca Clare B. Hardham 1969-8-28 17440 Lassen West of Janesville. Comment
  CAS-BOT-BC116611  Carex subfusca Hans Leschke 1954-7-5 s.n. Lassen Hat Lake 1965 Comment
  CAS-BOT-BC116613  Carex subfusca Hans Leschke 1958-8-17 1568 Lassen Reflexion Lake 1792 Comment
  CAS-BOT-BC115283  Carex utriculata Ray Hanson 1954-8-23 s.n. Lassen Lassen Park, near Jackey Lake. Comment
  HSC103651  Carex utriculata Thomas W. Nelson, Jane Nelson 1985-8-10 8009 Lassen Along north side of Silver Lake 1829 Comment
  HSC95272  Carex vesicaria Gordon Leppig, Kai Neander, Juli Neander 1997-7-26 695 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  HSC95286  Carex vesicaria Gordon Leppig 1998-8-17 1039 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC114881  Carex whitneyi John Thomas Howell 1959-9-23 s.n. Lassen North end of Juniper Lake, Lassen Park. 2057 Comment
  CAS-BOT-BC114879  Carex whitneyi Beecher Crampton 1964-6-26 7075 Lassen Ca 4 mi SSE Bogard Ranger Station, Lassen National Forest. Comment
  CHSC93559  Castilleja angustifolia Lowell Ahart; John Dittes 2005-6-2 11978 Lassen Long Valley, north side of a poor dirt road, about 4 1/2 miles (air) northeast of the interesection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. Comment
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Oct 20 2009
  UC585181  Castilleja angustifolia E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1759 Lassen e of Red Rock (nw side of summit of ridge) 1828 Comment
  CAS-BOT-BC249340  Castilleja applegatei Gary Schoolcraft 1983-7-19 1097 Lassen S. slopes of Fredonyer Pk. 33-12-27 2255 Comment
  HSC93502  Castilleja applegatei subsp. disticha Gordon Leppig, Tony LaBanca 1998-7-13 965 Lassen Modoc National Forest, Blue Lake Ranch 1799 Comment
  CAS-BOT-BC249617  Castilleja applegatei subsp. pinetorum Alice Eastwood; John Thomas Howell 1940-6-15 8326 Lassen Grasshopper Valley Comment
  CAS-BOT-BC249623  Castilleja applegatei subsp. pinetorum John Thomas Howell 1934-7-10 12556 Lassen Black's Mt. Comment
  CHSC13732  Castilleja applegatei subsp. pinetorum Cornell Freeman 1973-7-11 5 Lassen Found on Gallatin Pk. on the east side of Eagle Lake. 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
  JEPS17616  Castilleja applegatei subsp. pinetorum Rimo Bacigalupi with G. T. Robbins 1955-7-20 5411 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley); Warner Mountains, Modoc National Forest, Long Valley Meadow 2057 Comment
  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
  UC1063040  Castilleja applegatei subsp. pinetorum H. P. Hagge 1929-9-12 25 Lassen Logan Mtn.; Eagle Lake Quad. 1828 Comment
  UC1063043  Castilleja applegatei subsp. pinetorum A. Simontacchi 1940-5-16 728 Lassen 2.3 mi wnw Cone Mtn.; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC1063044  Castilleja applegatei subsp. pinetorum K. E. Bradshaw 1939-5-27 238 Lassen n end Black Mountain Experimental Forest (Plot 39-1); Lassen National Forest, Halls Flat Quad. 1767 Comment
  UC1537569  Castilleja applegatei subsp. pinetorum Gordon H. True Jr. 1936-6-27 563 Lassen Hot Springs Mountain 1676 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
  JEPS94529  Castilleja arachnoidea Vernon Oswald and Lowell Ahart 1997-6-24 8642 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
  UC1563850  Castilleja arachnoidea Barbara Ertter 1988-7-25 7861 Lassen ca 1.5 mi e Diamond Peak (ca 10 air mi due s of Susanville, ridge of Diamond Mts); Diamond Mts. 2286 Comment
  SEINET3836934 Image available Castilleja campestris Marcus E. Jones 1897-7-3 Lassen Pratville 1372 Comment
  CHSC117210  Castilleja lacera Lowell Ahart; John Dittes 2016-6-7 20993 Lassen West of pond, 110 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS80676  Castilleja lacera L. R. Heckard with T. I. Chuang 1981-6-10 5528 Lassen 2.3 mi w Nubieber (along Route 299) 1341 Comment
  JEPS88512  Castilleja lacera Vernon H. Oswald and Lowell Ahart 1996-6-24 7842 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi ne of Eagle Lake Rd (A1), Papoose Meadows, w side of meadow just s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1012486  Castilleja lacera Francis W. Pennell 1940-6-7 25723 Lassen 4-5 mi w Nubieber (Route 299) 1097 Comment
  UC1609288  Castilleja lacera Vernon H. Oswald and Lowell Ahart 1993-6-28 5575 Lassen 0.2 mi n Hwy. 44, e side of Grays Valley (Harvey Valley Rd (33N02), e of Poison Lake); Grays Valley 1749 Comment
  CAS-BOT-BC226034  Castilleja lacera Ella D. Cantelow 1940-5-31 4439 Lassen E of McArthur Comment
  JEPS76163  Castilleja linariifolia T. I. Chuang with Fei-Mei Chuang 1977-7-25 7660 Lassen 10 mi w Madeline Comment
  JEPS17633  Castilleja miniata Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5402 Lassen 2.3 mi s of and below Patterson Ranger Station (meadowy spots along East Creek on grade, 0.8 mi s of Lassen-Modoc County line, s-end of Warner Mts); Warner Mts., East Creek 2011 Comment
  CAS-BOT-BC244887  Castilleja miniata Alice Eastwood 1912-8-22 1784 Lassen trail from Morgans Springs to Sulphur Works. Lassen Butte Region. Comment
  CHSC5901  Castilleja miniata subsp. miniata R. Gein 1946-6-22 Lassen Webb's Camp, Eagle lake. 1557 Comment
  CHSC37346  Castilleja pilosa Jenifer Estep 1978-6-27 17 Lassen SE of Eagle L. at Mahogany L. Comment
  CHSC112415  Castilleja tenuis Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18773 Lassen 300 - 400 or more or less yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC64896  Castilleja tenuis Vernon Oswald 1995-6-26 6922 Lassen Modoc Plateau, Northern Juniper Woodland. Ash Valley Rd. (Lassen 527), 4.2 mi w of Madeline. 1652 Comment
  JEPS121270  Castilleja tenuis Lowell Ahart 2013-7-22 18840 Lassen W margin of duck field, about 30 yards SE of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC717969  Castilleja tenuis David D. Keck 1944-6-8 5444 Lassen 2 mi e Westwood (near Mountain Meadows Reservoir) 1524 Comment
  JEPS103212  Castilleja tenuis G. Schoolcraft 1993-6-29 2314 Lassen Ash Valley RNA 16 miles east of Adin, CA 1554 Comment
  SBBG128749  Castilleja tenuis L. Ahart, J. Dittes 2008-6-22 15027 Lassen a small natural drainage, ca. 20 yards W of the rd levee, open meadow area, in Big Valley, ca. 2.1 mi (air) NE of the Headqaurters at Ash Crk State Wildlife Area, ca. 5.0 mi (air) NE of Bieber 1262 Comment
  UCD164167  Caulanthus major N. Ivalu Cacho; Sharon Y. Strauss, Bryan T. Drew 2010-7-5 IC-SS 131 - Lassen Fredoyner Peak; on rocky outcrop on summit. 2393 Comment
  JEPS123842  Caulanthus major var. nevadensis Lowell Ahart, John Dittes 2015-7-14 20329 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  NY608460  Caulanthus major var. nevadensis N. H. Holmgren 1978-6-11 8923 Lassen Painters Flat road, 28.3 km (17.6 miles) east of Ravendale and 23.5 km (14.5 miles) airline distance. 1740 Comment
  UC1523761  Caulanthus major var. nevadensis Gary Schoolcraft 1982-6-23 733 Lassen Ft. Sage Mtns. 1828 Comment
  CAS-BOT-BC52052  Ceanothus prostratus Milo S. Baker 1894-7-30 s.n. Lassen Near Silver Lake Comment
  UC1071530  Ceanothus prostratus A. Simontacchi 1940-6-5 819 Lassen 8.2 mi WNW of Harvey Valley Ranger Station 1737 Comment
  HSC99160  Ceanothus prostratus Paul J. CaraDonna 2009-5-17 133 Lassen Vista Point, S of highway, 0.25 mi. S of mile marker 58 1524 Comment
  CHSC23565  Ceanothus velutinus W. O. Baum 1971-6-28 46 Lassen E slope of Gallatin Peak. 1950 Comment
  UCSB62941  Ceanothus velutinus Sarr, Dan 1995-7-29 Lassen N-side of Eagle Pass, 1 mi. below the summit 1900 Comment
  JEPS107853  Ceanothus velutinus var. velutinus Lowell Ahart, John Dittes 2005-6-2 11943 Lassen Along a small stream, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  SEINET10690337  Ceanothus velutinus var. velutinus Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 153 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  CDA1996  Cenchrus longispinus T. C. Fuller 1965-10-13 14198 Lassen 1 mi. W of Johnstonville, on N side of old road to Susanville. (A27 ? Johnstonville Rd. N of Center Rd.) 0 Comment
  CAS-BOT-BC277000  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen E. side of Hwy 395 to Madelaine, 1.6 mi. n. of Termo Comment
  RSA157739  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen East side of Hwy. 395 to Madelaine, 1.6 miles north of Termo Comment
  UCD130020  Centaurea diffusa T. C. Fuller 1962-8-28 9480 Lassen east side of Highway 395 to Madelaine, 1.6 mile north of Termo. Comment
  CDA7344  Centaurea squarrosa Loring White 1950-8-19 Lassen Cramer Ranch. Big Valley. 0 Comment
  CDA7335  Centaurea squarrosa T. C. Fuller 1959-10-15 3125 Lassen East of Pitt River, road to Lookout, ca. 2 miles north of Bieber. 0 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
  RSA186838  Centaurea virgata subsp. squarrosa T. C. Fuller 1966-7-20 14961 Lassen Both sides of road from 0.1 to 0.9 miles south of the bridge at Pittville Comment
  RSA516348  Centaurium exaltatum Barbara Ertter 1987-7-24 7305 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  CAS-BOT-BC388152  Cerastium fontanum Louella Bass 1973-6-3 90 Lassen Elysian Valley. West side of Ridge Meadow 1325 Comment
  CHSC29928  Cerastium fontanum subsp. vulgare Robin L. Ondricek 1978-6-16 77 Lassen In the meadow below the dam at Murrers Upper Meadow. 1548 Comment
  POM101579  Cerastium glomeratum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  POM89499  Cercocarpus ledifolius Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC143808  Cercocarpus ledifolius var. ledifolius L. B. Barlow 1967-7-15 130 Lassen Eagle Lake Biological Station, east central side of Eagle Lake 1554 Comment
  CAS-BOT-BC276618  Chaenactis douglasii var. douglasii John Thomas Howell 1934-7-8 12497 Lassen Spalding's Eagle Lake Comment
  HSC28855  Chaenactis douglasii var. douglasii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19288 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  HSC81187  Chaenactis douglasii var. douglasii Thomas W. Nelson, Jane P. Nelson 1980-7-6 5993 Lassen Along Adin-Madelin Rd., 16 mi. E of Adin in Ash Valley 1555 Comment
  UC579800  Chaenactis douglasii var. douglasii David D. Keck and J. Clausen 1935-6-25 3755 Lassen just w of town Susanville 1300 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
  SEINET7450297 Image available Chaenactis stevioides F. B. Headley 1915-5-28 s.n. Lassen Honeylake Comment
  UC585132  Chaenactis xantiana E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1770 Lassen sw facing slope of ridge above Red Rock 1524 Comment
  NY758642  Chamaebatiaria millefolium G. Schoolcraft 1981-7-29 554 Lassen On south slope of McDonald Peak 2134 Comment
  UC747012  Chamaebatiaria millefolium G. Thomas Robbins 1945-10-6 2151 Lassen nw slope ofCrater Lake Mountain, Lassen National Forest Crater Lake Mountain; Lassen National Forest, Crater Lake Mountain 1981 Comment
  UC1125090  Chamaesaracha nana A. Simontacchi 1940-6-8 831 Lassen Halls Flat Ranger Station; Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC26091  Chamaesaracha nana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC31977  Chamaesyce serpillifolia subsp. serpillifolia L. Ahart; J. T. Howell 1974-7-9 532 Lassen Along edge of rd, 4 mi w of Susanville. 1584 Comment
  CHSC43335  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart; John Thomas Howell 1974-7-9 533 Lassen Along the edge of road A1, about 4 miles north-west of Susanville. 1584 Comment
  CHSC66863  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1996-9-10 8278 Lassen Mountain Meadows Reservoir SW of Westwood. On the embankment of the railroad at the northwest edge of the reservoir. 1539 Comment
  JEPS88232  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and Lowell Ahart 1996-6-17 7771 Lassen 7 mi W of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off N side of Hwy 36 ca. 0.2 mi E of the 7 mi post); Modoc Plateau 1432 Comment
  JEPS52348  Chamaesyce serpyllifolia W. L. Jepson 1918-8-2 7762 Lassen Beckwith Pass 1463 Comment
  CAS-BOT-BC69434  Cheilanthes feei B. C. Cain 1923-8-24 90 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park. 1645 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
  UC1191330  Chenopodium chenopodioides Malcolm A. Nobs and S. Galen Smith 1949-7-22 1071 Lassen Eagle Lake; ne shore Comment
  UC1949076  Chenopodium desiccatum Barbara Ertter 1988-7-25 7871 Lassen ridge of Diamond Mts. ca 1.5 mi E of Diamond Peak, ca 10 airmiles due S of Susanville; spur on N-face. Comment
  SEINET4171909  Chenopodium leptophyllum M. J. Williams 1974-7-26 74 -L-36 Lassen 2 miles west of Hallelujah Junction, south of HWY 70 1494 Comment
  CHSC68860  Chenopodium simplex Vernon Oswald; Lowell Ahart 1997-6-24 8602 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. 1655 Comment
  CAS-BOT-BC451356  Chimaphila menziesii Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain: Susanville. Perkin's Ranch 2133 Comment
  CHSC45516  Chimaphila menziesii Lowell Ahart; John Thomas Howell 1974-7-9 538 Lassen On the south side of Eagle Lake Road, near the south edge of Eagle Lake. 1584 Comment
  CAS-BOT-BC383110  Chrysolepis sempervirens Andrew Townesmith; Karen M. Meyer 2007-7-22 841 Lassen Lassen National Forest, Almanor Ranger District. Little Tule Lake, 6.1 miles west county road A21 on county road 110 and Forest Service road 10 1980 Comment
  SEINET10730905  Chrysolepis sempervirens Andrew Townesmith, Karen M. Meyer 2007-7-22 Townesmith 841 Lassen Lassen National Forest, Almanor Ranger District. Little Tule Lake, 6.1 miles west county road A21 on county road 110 and Forest Service road 10. T31N R7E S35 NW 1/4. 1980 Comment
  UC1135263  Chrysolepis sempervirens A. Simontacchi 1940-8-8 938 Lassen 4.2 mi w Harvey Mtn. Lookout; Lassen National Forest, Halls Flat Quad. 1889 Comment
  UC1135264  Chrysolepis sempervirens A. Simontacchi 1940-6-15 881 Lassen 0.4 mi nw Blacks Mtn.; Lassen National Forest, Halls Flat Quad. 2164 Comment
  SEINET7450659 Image available Chrysopsis villosa var. minor M. J. Williams 1974-7-29 74 -L-61 Lassen 2 mi. west of Hallelujah Junction, south of Hwy. 70. 1494 Comment
  CDA19740  Chrysothamnus viscidiflorus D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Madeline. 0 Comment
  CAS-BOT-BC105908  Chrysothamnus viscidiflorus subsp. viscidiflorus Carl B. Wolf 1931-9-4 1271 Lassen Big Valley, 2.6 miles from Bieber on road to Alturas 1267 Comment
  UC1186580  Chylismia claviformis subsp. integrior G. I. Stage and R. W. Thorp 1959-6-20 59 -116 Lassen 9.6 mi n Litchfield Comment
  CHSC5034  Cichorium intybus L. B. Barlow 1967-7-6 108 Lassen 2 mi. west Murrer's Ranch turn off, 14.9 mi. north of Susanville, Calif., Highway 139. 1463 Comment
  RSA746510  Cirsium andersonii K. M. Meyer, A. Townesmith 2007-7-21 143 Lassen Lassen National Forest. CA, 1.3 mi. on road 110, off Hwy A21, 1821 Comment
  CDA1125  Cirsium canescens T. C. Fuller 1962-8-28 9479 Lassen 0.25 mi n. of Termo, Madelaine Plains; roadside, Hwy 395 to Madelaine. 0 Comment
  CAS-BOT-BC278010  Cirsium cymosum Arnold Tiehm; James Young; Raymond Evans 1984-6-7 8596 Lassen Flats on the northwest side of Shaffer Mountain, 9 air miles north-northwest of Litchfield 1386 Comment
  CDA1166  Cirsium cymosum T. C. Fuller 1959-7-7 2762 Lassen Hwy 395; 1.7 mi. south of Ravendale. 0 Comment
  CDA1174  Cirsium cymosum G. D. Barbe 1982-7-13 3882 Lassen Madeline Plain Scattered along Westside Rd. at base of Dry Valley Ridge, 3 mi. n. of Termo- Grasshopper Rd. 0 Comment
  CHSC7638  Cirsium cymosum Beverly J. Wise 1969-5-15 17 Lassen 23.8 mi. East of Susanville of Hwy 395. 1524 Comment
  CAS-BOT-BC278009  Cirsium cymosum Michael A. Vincent 1999-6-9 8575 Lassen Bureau of Land Management land; Madeline Plains. Southwest of US Rt. 395, southeast of CR 515 (Termo Road), south of BLM Rd. 1614, and southwest of Termo. Along jeep road to Schott Canyon Comment
  CDA1173  Cirsium cymosum G. D. Barbe 1982-7-12 3870 Lassen Grasshopper Valley; South Grasshopper Rd, 0.8 miles northeast of Hwy 139. 0 Comment
  RSA0070618  Cirsium douglasii var. breweri F. W. Peirson 1926-6-22 6824 Lassen Near Hot Springs, Drakesbad, Mount Lassen National Park. 1677 Comment
  CDA1257  Cirsium inamoenum T. C. Fuller 1959-7-7 2739 Lassen Rocky hillside by Hwy 395, 6 mi N/ road to Karlo. Comment
  CHSC116356  Cirsium inamoenum J. R. Keck Jr.; D. L. Haws 1980-7-22 PDR 330194 Lassen Ravendale, BLM rangeland. 1625 Comment
  RSA0070635  Cirsium inamoenum T. C. Fuller 1980-8-5 20312 Lassen North of the road, 0.4 km east of campground, east shore of Dodge Reservoir, 28 km (17.5 miles) northeast of Ravendale. Comment
  SEINET2050011 Image available Cirsium occidentale var. candidissimum Noel H. Holmgren, John J. Fay & Barton L. Bethers 1970-6-25 4377 Lassen North end of Petersen Mountain, near US 395, 8 miles north of junctin with Calif. 70 (Hallelujah Junction). 1524 Comment
  RSA186832  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14980 Lassen East of road at the east base of Dry Valley Ridge, Madelaine Plains, 3 miles north of paved road, 10 miles west of Termo. Comment
  CAS-BOT-BC280429  Cirsium ochrocentrum T. C. Fuller 1965-10-13 14199 Lassen E. of rd. at the e. base of Dry Valley Ridge, Madelaine [Madeline] Plains, 3 mi. n. of paved road, 10 mi. w. of Termo Comment
  CDA32840  Cirsium ochrocentrum CDFA Staff 1985-6-3 Lassen Madelaine Plains 0 Comment
  CAS-BOT-BC286307  Cirsium scariosum John Thomas Howell 1976-7-20 52025 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  CAS-BOT-BC439005  Cistanthe monosperma Jeanne Janish; Carl Janish 1938-9-6 s.n. Lassen Near Summit Lake, Lassen National Park. 2042 Comment
  CAS-BOT-BC233915  Cistanthe umbellata A. M. Vollmer; L. Beane 1953-7-1 32 Lassen Along Halls Flat Road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  JEPS108589  Clarkia gracilis subsp. gracilis L. P. Janeway 2005-7-4 8465 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41 1752 Comment
  CAS-BOT-BC163165  Clarkia lassenensis Louella Bass 1983-6-10 6 -83 Lassen Lassen College Campus, Susanville Comment
  UC930759  Clarkia lassenensis C. L. Hitchcock 1940-5-26 6610 Lassen ca. 12 mi n Fall River Mills; Fall River 1371 Comment
  UCD55291  Clarkia lassenensis Ellen Dean; Gary Schoolcraft 2006-5-16 3112 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
  CAS-BOT-BC164869  Clarkia rhomboidea Clare B. Hardham 1961-6-16 7447 Lassen S. of Susanville Comment
  UC1122437  Clarkia rhomboidea A. Simontacchi 1940-6-23 885 Lassen 3.2 mi sw Schoonamaker Lake; Lassen National Forest, Halls Flat Quadrangle 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
  CHSC29922  Claytonia rubra subsp. rubra Robin L. Ondricek 1978-7-5 88 Lassen On the ne side of Mahogany Lake. 2057 Comment
  UC452681  Claytonia umbellata Milo S. Baker 1890-1 Lassen Milford Comment
  CHSC7714  Cleome platycarpa Beverly J. Wise 1969-5-3 4 Lassen 4.7 mi east of junction of Hwy 395 on las. Co. Rd. 338 (Smoke Creek Rd.) 1554 Comment
  NY222746  Cleome platycarpa N. H. Holmgren 1978-6-11 8928 Lassen Upper Smoke Creek, south side of Observation Peak, 7.6 km (4.7 mi) northeast of Rye Patch Canyon summit, 18.5 km (11.5 mi) airline distance east-southeast of Ravendale. 1700 Comment
  NY222830  Cleome platycarpa G. H. True Jr. 1937-6-27 792 Lassen Near Skeedaddle. 1524.0 Comment
  SEINET3153948  Cleome platycarpa J. L. Strother 1970-5-23 951 Lassen About 6 miles N of Honey Lake, at ca. 4200 feet elevation. 1280 Comment
  NY242101  Cleomella hillmanii G. Schoolcraft 1989-5-31 1883 Lassen 3 mi. N. Wendel Rd. along Skedaddle Ranch Rd. 1463.0 Comment
  NY242228  Cleomella plocasperma A. Tiehm 1980-5-29 5746 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles NNW of Wendel. 1231.4 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
  CHSC36452  Collinsia greenei Susan H. Euing 1982-6-6 6 Lassen Pine Creek below fish trap. Flood plain-dry lake bed area. Comment
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Jun 18 2018
  JEPS17613  Collinsia parviflora Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5406 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley Meadows, s end of Warner Mtns); Warner Mts., Modoc National Forest, Long Valley Meadows 2057 Comment
  JEPS95075  Collinsia parviflora Vernon H. Oswald and Lowell Ahart 1997-5-27 8500 Lassen North of Susanville (on Forest Rte. 38N04 (between Hwy. 139 near Willow Creek Guard Station & Coyote Flat), 0.1 mi. e. of Hwy. 139, on flood plain of small creek paralleling rd.) 1546 Comment
  RSA0035917  Collinsia parviflora Lowell A. Ahart, John Dittes 2008-6-20 14916 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  SEINET10315318 Image available Collinsia parviflora Jeffrey Huber 1971-6-2 127 Lassen Approximately 30 miles north of Susanville, on California Hwy 139 1646 Comment
  SBBG12810  Collinsia parviflora A. I. Richardson 1961-5-30 5 Lassen 9 mi S of Eagle Lake 1402 Comment
  SEINET13396903  Collinsia parviflora J. A. Young 1978-4-13 s.n. Lassen Meyers Ranch, near Adin. Comment
  UC2016544  Collinsia parviflora Richard Olmstead 1984-6-26 578 Lassen 3.5 miles east of junction of Forest Service Road and Red Rock Lookout Road (28N02), on Red Rock Lookout Road. Near small stream lined with alders. Comment
  CHSC5903  Collinsia torreyi M. West 1946-6-24 Lassen Dow Butte Road. Eagle Lake. 1828 Comment
  HSC75886  Collinsia torreyi D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19258 Lassen Harvey Valley near Cone Springs Comment
  CHSC6198  Collomia grandiflora P. Collett 1946-6-24 Lassen Spalding's, Eagle Lake. 1554 Comment
  POM126992  Collomia grandiflora Franklin P. Nutting 1894-7-12 s.n. Lassen Pine Creek 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
  CHSC68866  Collomia linearis Vernon Oswald; Lowell Ahart 1997-6-24 8621 Lassen South of Susanville on the north side of Diamond Mtn. at an impoundment on the edge of Forest Rd. 29N43 ca. 7.4 miles east of Gold Run Rd. (29N10), ca. 2.7 mi east of Lassen NF boundary. 2036 Comment
  CHSC6200  Collomia tinctoria 1946-6-13 Lassen Eagle Lake. 1584 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
  CHSC92760  Collomia tinctoria L. P. Janeway 2005-7-4 8468 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 1752 Comment
  RSA122984  Collomia tinctoria L. R. Short, J. Warren 1936-6-10 s- 382 Lassen Burgess Spr. Exp. Range 1790 Comment
  UC1123659  Collomia tinctoria A. Simontacchi 898 Lassen 2.6 mi s Ladder Butte; Lassen National Forest, Halls Flat Quadrangle Comment
  RSA128290  Collomia tinctoria P. H. Raven, Otto T. Solbrig 1958-6-16 13255 Lassen Along State Highway 36, 0.9 miles east of summit of Fredonyer Pass Comment
  CHSC96716  Comarum palustre Gordon Leppig; T. LaBanca 1997-6-29 525 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  UC761797  Cordylanthus ramosus R. F. Hoover 1940-9-28 4640 Lassen Leavitt Comment
  JEPS88238  Cornus sericea subsp. sericea Vernon H. Oswald and Lowell Ahart 1996-6-17 7810 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36, at 6 mi. post e. of Devils Corral Trailhead); Modoc Plateau 1420 Comment
  CHSC75453  Crepis acuminata Vernon H. Oswald; Lowell Ahart 1999-6-9 9742 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  UC581223  Crepis acuminata G. L. Stebbins Jr. and J. A. Jenkins 1936-6-7 1763 Lassen ne slope of ridge near summit east of Red Rock 1818 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-BC290393  Crepis acuminata G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2313 Lassen Black Mountain about a mile below the summit 1940 Comment
  CAS-BOT-BC291552  Crepis intermedia G. L. Stebbins; J. A. Jenkins 1937-7-10 2297 Lassen Crest of range head of Stony Ridge west of Milford 1950 Comment
  UC581218  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-14 2347 Lassen Quartz Mine Willow Creek 1524 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
  POM17695  Crepis monticola Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  UC581277  Crepis occidentalis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2319 Lassen about a mi below summit; Black Mountain 1940 Comment
  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
  UC1776658  Crepis occidentalis G. Schoolcraft 1998-6-8 2731 Lassen Hills N. of Wendel 1402 Comment
  CAS-BOT-BC290750  Crepis occidentalis subsp. occidentalis Doris Kildale Gillespie 1930-5-12 9337 Lassen 2 miles north of Susanville on road to Alturas Comment
  UC581289  Crepis occidentalis subsp. occidentalis E. B. Babcock and G. L. Stebbins Jr. 1936-6-7 1748 Lassen nw-facing slope of ridge e Red Rock 1600 Comment
  CHSC93565  Crepis pleurocarpa Lowell Ahart; John Dittes 2005-6-2 11934 Lassen Long Valley, along the poor dirt road, about 1/4 mile west of the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.5 miles (air) northwest of Hallelujah Junction. 1498 Comment
  CHSC71895  Crypsis schoenoides Vernon H. Oswald; Lowell Ahart 1998-9-8 9577 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. Near the highway. 1255 Comment
  CHSC76103  Crypsis schoenoides Lowell Ahart; Vernon H. Oswald 1999-9-13 8216 Lassen In a field, about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  JEPS94076  Crypsis schoenoides Vernon H. Oswald and Lowell Ahart 1998-9-8 9577 Lassen Hwy. 299 at R.R. overpass on e. side of Nubieber (depression near hwy.) 1255 Comment
  CHSC23441  Cryptantha K. R. Stern; D. B. Joley, J. G. Geschke 1974-6-23 5840 Lassen Ca. 1 mi se of Ravendale on w side of Hwy. 395. 1618 Comment
  CHSC71074  Cryptantha circumscissa Vernon H. Oswald; Lowell Ahart 1998-5-22 9135 Lassen Fort Sage Rd. 2.3 mi north of Hackstaff Rd., ca. 3.5 mi north of Doyle. 1341 Comment
  CHSC7765  Cryptantha circumscissa Beverly J. Wise 1969-5-18 77 Lassen 17.2 mi. East of Susanville on Las. Co. Rd 216 off Las. Co. Rd. 215. 1524 Comment
  UC699733  Cryptantha circumscissa Farris Farris 1936-6-5 Lassen Airport, Susanville Susanville 1280 Comment
  UCD55276  Cryptantha circumscissa Ellen Dean 2006-5-15 3091 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1245 Comment
  JEPS97421  Cryptantha intermedia Vernon H. Oswald and L. Ahart 1995-6-19 6878 Lassen Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395 1383 Comment
  NY1111719  Cryptantha intermedia var. grandiflora N. H. Holmgren 1980-7-3 9474 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) west of U.S. Higwhay 395 from a turnoff 10.3 km (6.4 mi) south of Madeline 1620 Comment
  CDA40508  Cryptantha muricata Gary Schoolcraft 2000-6-19 2903 Lassen West of Cold Spring Velley. Comment
  UC78602  Cryptantha pterocarya T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  CHSC106073  Cryptantha torreyana Lowell Ahart; John Dittes 2010-7-31 17028 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC402818  Cryptantha torreyana Milo S. Baker Jul 1912 Lassen Pine Creek Comment
  JEPS107447  Cryptantha watsonii Lowell Ahart, John Dittes 2005-6-1 11892 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  NY1112083  Cryptantha watsonii B. J. Ertter 1987-6-16 7187 Lassen Skeedaddle Mountains on northeast side of Honey Lake, open rhyolitic ridge west of Hot Springs VABM 2134 Comment
  SEINET8191424  Cryptantha watsonii F. B. Headley 1915-5-28 s.n. Lassen Honey Lake Comment
  UCR243134  Cuscuta approximata Jerry Schmierer 1986-9-1 s.n. Lassen Don Blickenstaff Ranch 1220 Comment
  CHSC59701  Cusickiella douglasii Mary Meyer 1980-7-15 Lassen 1546 Comment
  CHSC117528  Cyperus squarrosus Lowell Ahart; John Dittes 2016-7-13 21139 Lassen Scattered along the south edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC60861  Cyperus squarrosus Vernon H. Oswald; Lowell Ahart 1993-6-28 5624 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. On the bed of a small branch of Pine Creek 1737 Comment
  UC1567429  Cyperus squarrosus G. Schoolcraft 1989-7-24 1994 Lassen along n. shore Said Valley Reservoir 1630 Comment
  CAS-BOT-BC70537  Cystopteris fragilis Clare B. Hardham 1961-6-16 7461 Lassen Diamond Peak Comment
  CHSC117185  Cystopteris fragilis Lowell Ahart; John Dittes 2016-6-7 21007 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UC1063768  Cystopteris fragilis A. Simontacchi 1940-6-5 814 Lassen 3.9 miles nw Cone Mt.; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  SEINET6627868  Cystopteris fragilis M. J. Williams 1970-7-4 s.n. Lassen Ash Creek, SE of Adin 1280 Comment
  SEINET6629019  Cystopteris fragilis M. J. Williams 1970-7-4 s.n. Lassen Ash Creek, SE of Adin 1280 Comment
  CHSC99298  Damasonium californicum Lowell Ahart; John Dittes 2008-6-20 14941 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  SBBG45003  Damasonium californicum C. L. Hitchcock 1940-5-26 6646 Lassen overflow of Pitt River, 1 mi W of Bieber Comment
  UC1137760  Damasonium californicum August L. Hormay 1934-5-14 Lassen Poison Lake Lassen Nat'l Forest, Poison Lake 1706 Comment
  CAS-BOT-BC445520  Damasonium californicum Clarence R. Quick 1962-6-17 62 23 A Lassen Swains Hole, south of Blacks Mountain Experimental Station 1554 Comment
  JEPS124716 Image available Damasonium californicum B. Corwin 1964-7-1 123 Lassen Under bridges between Bieber and New Bieber on rte. 299. Comment
  RSA323646  Damasonium californicum A. Tiehm, Gary Schoolcraft 1984-8-14 9245 Lassen Buckhorn Reservoir on the south side of Buckhorn road to Ravendale, about 6 road miles west of the state line. 1699 Comment
  SEINET3828852  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
  UCD61015  Danthonia californica John Thomas Howell; Gordon H. True and Margaret Williams 1973-6-28 49487 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CHSC61076  Danthonia californica var. americana Vernon H. Oswald; Lowell Ahart 1993-8-3 5755 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  UCD60868  Danthonia californica var. americana Mrs. Austin 1894-6-1 295 Lassen Lassen Creek. Comment
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Jul 11 2013
  UC1136812  Danthonia unispicata L. R. Short and Wm. Gansberg 1936-6-8 S- 398 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1755 Comment
  CHSC48859  Dasiphora fruticosa Vernon Oswald 1986-8-7 2270 Lassen Hwy 36, 12.6 mi e of the Lassen-Plumas County line, 0.8 mi e of Fredonyer Pass. Roadcut. 1706 Comment
  SDSU4575  Deinandra lobbii D. F. Howe 1961-8-4 3135 Lassen 11.5 miles east of Mc Arthur on U.S. 299. 1372 Comment
  CHSC106590  Delphinium andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  UC726247  Delphinium armeniacum A. A. Heller 1938-6-4 15149 Lassen 1 mile east of Fredonyer Pass east of Westwood. 1706 Comment
  CAS-BOT-BC9945  Delphinium nudicaule Mrs. H. C. Cantelow 1941-5-22 N. S. Lassen Fredonyer Pass, 12 miles west of Susanville. Comment
  RSA398661  Delphinium nudicaule Christopher Davidson 1975-6-6 2722 Lassen 3.9 miles from jct of county roads 204 and 205 on road 204 along Gold Run Creek, SW of Susanville. 1395 Comment
  RSA716264  Delphinium nuttallianum L. Ahart 2005-6-2 11955 Lassen Along poor dirt road, 1 mile E of Anderson Ranch home, Long Valley, 4.5 miles air N of the intersection of Scott Road and Hwy 70, 6 miles NW of Hallelujah jct. 1426 Comment
  CAS-BOT-BC194257  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1934-7-9 12517 Lassen Bridges Creek Spring Comment
  CAS-BOT-BC194261  Deschampsia cespitosa subsp. cespitosa John Thomas Howell; Gordon H. True 1973-8-1 50230 Lassen Headwaters of Boxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  JEPS28061  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-7-22 876 Lassen 100 yds. above lake near s. shore Snag Lake; Lassen Volcanic Nat'l Park, Snag Lake 1850 Comment
  CAS-BOT-BC192739  Deschampsia danthonioides John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50650 Lassen South and southeast of Diamond Mt. 2286 Comment
  CAS-BOT-BC192744  Deschampsia danthonioides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16328 Lassen Along southern shore of Eagle Lake Comment
  UC1024884  Deschampsia danthonioides Leo Whitney 1935-5-26 3137 Lassen 10 mi. e. Adin (Ash Creek); Ash Creek Comment
  UC1131560  Deschampsia danthonioides A. Simontacchi 1940-6-8 827 Lassen Halls Flat Ranger Station Lassen Nat'l Forest, Halls Flat Quad., Halls Flat Ranger Sta Comment
  UC188945  Deschampsia danthonioides Milo S. Baker 1900-7-5 Lassen Dixie Valley Comment
  HSC23170  Deschampsia elongata D. E. Anderson 1969-7-5 4993 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  UC53606  Deschampsia elongata M. S. Baker and Frank Nutting 1894-7-5 Lassen Davis Creek Comment
  UCD63522  Deschampsia elongata Malcolm A. Knobs; S. Galen Smith 1949-7-21 1058 Lassen 4 miles N of Madeline. Comment
  SEINET10480673  Descurainia Mary Susan Taylor 1982-5-29 Taylor 4564 Lassen T22N R17E se sec 23. Loyalton quad. NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno; in Sagebrush Scrub. 4900 ft. 1493 Comment
  CAS-BOT-BC43105  Descurainia paradisa G. Schoolcraft 1998-6-9 2733 Lassen Lower slopes of Amedee Mountains. 1249 Comment
  CAS-BOT-BC43164  Descurainia pinnata subsp. brachycarpa John Thomas Howell 1976-7-20 52023 Lassen Sierra Nevada. Bottom flatas along Willard Creek near its confluence with Susana River. 1432 Comment
  CAS-BOT-BC43166  Descurainia pinnata subsp. brachycarpa Doris Kildale Gillespie 1930-5-12 9327 Lassen 2 miles north of Susanville on road to Alturas. Comment
  CAS-BOT-BC43486  Descurainia sophia James Jokerst 1983-5-31 1790 Lassen Near Madeline Plains. 1583 Comment
  RSA0035397  Descurainia sophia Lowell Ahart, John Dittes 2008-6-20 14912 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1924260  Descurainia sophia Debra Valov 2004-5-31 2004227 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CAS-BOT-BC43484  Descurainia sophia Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16334 Lassen 13.5 miles east of Susanville. Comment
  CHSC56816  Dichelostemma multiflorum Jerry Snodgrass 1978-7-8 42 Lassen Willard Creek, 2 mi S of Hwy 36 near Forest Service campsite. 1499 Comment
  CAS-BOT-BC299809  Dieteria canescens var. canescens G. Schoolcraft 1988-8-24 1858 Lassen 16 miles east of Adin 1645 Comment
  CAS-BOT-BC299810  Dieteria canescens var. canescens Ella Dales Cantelow 1940-10-5 3412 Lassen N.W. of Johnstonville Comment
  HSC63945  Dieteria canescens var. canescens Teresa Prendusi 1980-7-1 Lassen Little Antelope Valley 1677 Comment
  UC73995  Dieteria canescens var. canescens J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Amedee Honey Lake Valley Comment
  CHSC60820  Dieteria canescens var. shastensis Vernon H. Oswald; Lowell Ahart 1993-6-28 5596 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, between Grays Valley and Harvey Valley, E of Poison Lake. 1734 Comment
  JEPS30487  Dieteria canescens var. shastensis Peter H. Raven with Otto T. Solbrig 1958-6-15 13244 Lassen 5.7 mi w Westwood (on State Highway 36) Comment
  UC86850  Dieteria canescens var. shastensis Wm. M. Canby 1897-9-1 138 Lassen Mt. Shasta Comment
  CAS-BOT-BC209003  Digitaria sanguinalis John Thomas Howell 1976-7-19 51941 Lassen Susanville - Sierra Nevada 1296 Comment
  CAS-BOT-BC153677  Diplacus mephiticus A. A. Heller; P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat Comment
  CHSC23562  Diplacus mephiticus W. O. Baum 1971-7-9 27 Lassen S and e slopes of Gallatin Peak. 2042 Comment
  OBI76990  Diplacus mephiticus Anthony Baniaga 2011-7-5 418 Lassen Lassen Natl Forest. E of Willard Crk. Fredonyer Pass quad. T29N R10E sec 25 NE of NW 1503 Comment
  SEINET13704195  Diplacus mephiticus A. A. Heller, P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat. Comment
  HSC9639  Distichlis spicata M. T. Milligan 1964-8-6 199 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 Comment
  UC38076  Distichlis spicata J. Burtt Davy June 17-24 1897 3304 Lassen Honey Lake Valley Comment
  CAS-BOT-BC136176  Dodecatheon alpinum Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake 1524 Comment
  HSC17905  Dodecatheon subalpinum W. F. Nickel 1965-4-11 Lassen About 100 yds. W of Paynes Creek on Hwy. 36 Comment
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Jun 27 2013
  CHSC117297  Downingia bacigalupii Lowell Ahart; John Dittes 2016-7-13 21116 Lassen Strand of the pond, 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS127280  Downingia bacigalupii Lowell Ahart, John Dittes 2016-7-13 21116 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
  JEPS127713  Downingia bacigalupii Alejandro Brambila, Michael Dolan 2016-7-20 CA 320 -168 Lassen Portuguese Flat Road North. Comment
  JEPS96026  Downingia bacigalupii Vernon H. Oswald and Lowell Ahart 1996-6-24 7845 Lassen 2.5 mi. s. Eagle Lake (Papoose Meadows located ca. 0.5 mi. e. of Eagle Lake Rd. (A1), w. side of meadow just s. of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1520668  Downingia bacigalupii Noel H. Holmgren and Patricia K. Holmgren 1980-7-3 9462 Lassen 5.6 mi w U.S. Highway 395; Madeline Plains 1615 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
  JEPS108448  Downingia bacigalupii Lisa Schultheis 1995-6-27 225 -95 Lassen Champ's Flat. N side of 33N16, 0.3mi from 33N06. Comment
  POM260453  Downingia bicornuta C. L. Hitchcock 1940-5-26 6645 Lassen Overflow of Pitt River, 1 mile W of Bieber. Comment
  CHSC60887  Downingia bicornuta var. bicornuta Vernon H. Oswald; Lowell Ahart 1993-7-8 5649 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  UC1101473  Downingia bicornuta var. bicornuta Herbert L. Mason and Verne Grant 1947-7-9 13291 Lassen 5 mi e Bieber Comment
  UC1609203  Downingia bicornuta var. bicornuta Vernon H. Oswald and Lowell Ahart 1993-7-8 5649 Lassen 1.9 mi n Highway 44 (Pittville Rd (Lassen 111, 36N01), se edge of Poison Lake, on the e side of the railroad, which parallels the lake shore at this point); Poison Lake 1709 Comment
  JEPS108502  Downingia bicornuta var. bicornuta Lisa Schultheis 1995-6-27 221 -95 Lassen E edge of Poison Lake. N on Pittville Rd. off of Rt. 44. E of Shasta/Lassen county line. Comment
  UC1609096  Downingia cuspidata Vernon H. Oswald and Lowell Ahart 1993-7-8 5647 Lassen 0.4 mi n Hwy. 44 (Pittville Rd (Lassen 111, 36N01) near its intersection with 33N11, near se end of Poison Lake) 1709 Comment
  SFV3644  Downingia elegans I. L. Wiggins, D. B. Wiggins 1961-6-16 16532 Lassen Dry, roadside swale in Big Valley, 2.5 miles east of Modoc-Lassen County liine. 1280 Comment
  SEINET3147635  Downingia elegans M. E. Jones 1897-6-22 sn Lassen 10 mi S of Amedee 1219 Comment
  JEPS3751  Downingia insignis Helen-Mar Wheeler 1952-7-11 Lassen s of Madeline Comment
  RSA128294  Downingia insignis P. H. Raven, Otto T. Solbrig 1958-6-17 13282 Lassen Along U.S. Hwy 395, 1.9 miles S of Ravendale. Comment
  UC1520665  Downingia insignis Noel H. Holmgren and Patricia K. Holmgren 1978-6-10 8902 Lassen 9 mi ene (8 mi air distance) Termo; Madeline Plains, Coyote Flat 1630 Comment
  UC1192038  Downingia laeta Malcolm A. Nobs and S. Galen Smith 1949-7-20 1047 Lassen Bieber, along Highway 299 Bieber Comment
  CAS-BOT-BC41369  Draba verna John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49203 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  JEPS94484  Draba verna Vernon H. Oswald and Lowell Ahart 1997-5-27 8522 Lassen 3.6 mi ne of Highway 139 (small impoundment on Coyote Flat Draw crossing Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat); Coyote Flat Draw crossing Forest Route 38N04 1731 Comment
  SEINET5342791  Draba verna J. Young 1978-4-13 s.n. Lassen Meyers Ranch, Adin, CA. Comment
  CHSC65308  Drosera anglica Vernon H. Oswald; Beth Corbin, Mike Dolan 1995-8-26 7216 Lassen Warner Mtns. Blue Lake located ca. 13 mi SE of Lik ... Field redacted by CHSC, contact the data manager for more information 1859 Comment
  HSC31371  Dysphania pumilio D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19292 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  JEPS123973  Elatine Lowell Ahart, John Dittes 2015-7-13 20297 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  JEPS123974  Elatine Lowell Ahart, John Dittes 2015-7-13 20295 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  UCR227660  Elatine R. F. Thorne, Larry E. DeBuhr 1975-8-22 47213 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
  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
  JEPS87390  Elatine californica Vernon H. Oswald and Lowell Ahart 1993-7-8 5661 Lassen 1.9 mi n Hwy. 44 (Pittville Rd (Lassen 111, 36N01), on se edge of Poison Lake); se edge Poison Lake 1706 Comment
  RSA252456  Elatine gracilis R. F. Thorne, C. W. Tilforth, K. Thorne 1969-9-5 39135 Lassen Said Valley Reservoir. 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
  UC1825  Eleocharis macrostachya J. Burtt Davy Jun 17-24 1897 3288 Lassen Honey Lake Valley Comment
  UC1100699  Eleocharis quinqueflora Malcolm A. Nobs, S. Galen Smith 1949-7-21 1061 Lassen 4 mi N of Madeline Comment
  CAS-BOT-BC197349  Elymus Melissa A. Berry 1957-6-30 s.n. Lassen Highway 395 1280 Comment
  UCD62904  Elymus X saundersii Lester J. Berry 1960-7-8 Lassen Burgess Springs Road, floor of Harvey Valley, ca. 7 miles S of Black's Mtn. Exper. Station, USDA. Comment
  CAS-BOT-BC221829  Elymus canadensis Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  HSC10975  Elymus caput-medusae T. F. Newman 1965-7-28 6540 Lassen N side of Skedaddle Mtn., E side of Wendel. 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
  JEPS123502  Elymus cinereus Wilson Collison, Jaileen Merced 2015-10-26 CA 320 -149 Lassen Head south on US-395 for 31.4 mi towards Madeline, turn left on Clarks Valley Road. Drive 10.5 mi on Clark Valley Road; take a right on Blue Lake Road. Comment
  SEINET10521751  Elymus cinereus var. pubens Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 888 Lassen 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. 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
  JEPS122360  Elymus elymoides Joseph Broberg, Jaycee Leonard 2012-7-31 CA 320 -117 Lassen From Alturas head south on Highway 395. At the town of Termo turn left onto Juniper Ridge road. Then turn left into the Mendibourne wildlife game management area. Collection is across a fence in BLM land Comment
  RSA152628  Elymus elymoides I. L. Wiggins, Dorothy Wiggins 1961-6-11 16343 Lassen 13.5 mi. E. of Susanville Comment
  SEINET12745634  Elymus elymoides F. B. Headley 1915-5-28 s.n. Lassen Honey Lake. Comment
  SEINET10527893  Elymus elymoides Billy Joe Cox, Paul Gallian 1971-6-2 Cox 2581 Lassen 6 mi S of Adin, alond Calif. hwy 139 right-of-way; in basalt-clay, grassy road bank; Artemesia-Juniper assoc. 1372 Comment
  CHSC13858  Elymus elymoides subsp. elymoides George Ellmore 1973-6-25 735 Lassen 10 m. from water on west side of Pelican Point on West Eagle Lake. 1560 Comment
  CHSC6320  Elymus elymoides subsp. elymoides Nick Santamaria 1968-6-29 16 Lassen On the ELBS grounds. Comment
  UC7793970  Elymus glaucus L. R. Short and Wm. Gansberg 1936-7-3 S- 470 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1859 Comment
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  CAS-BOT-BC206730  Elymus glaucus subsp. glaucus Clare B. Hardham 1971-8-22 18401 Lassen Aspen Swamp, Diamond Mountain 2133 Comment
  CAS-BOT-BC234094  Elymus multisetus John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49447 Lassen Elysian Valley west of Janesville, Sierra Nevada 1325 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
  JEPS121791  Elymus spicatus B. Castro and 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. Comment
  JEPS127709  Elymus spicatus Alejandro Brambila, Michael Dolan 2016-7-13 CA 320 -163 Lassen Cold Springs Road North of Bryn Marr Ranch. Comment
  UC70687  Elymus trachycaulus J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  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
  CHSC110307  Elymus triticoides L. P. Janeway; B. Castro 2012-7-2 10921 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake, 1.5 km north of Wendel, 0.8 km east of the road to Wendel. 1241 Comment
  CDA2044  Elytrigia elongata T. C. Fuller 1963-7-16 10920 Lassen Head of Secret Valley, W side of Hwy 395 to Litchfield, 14.1 miles S of Ravendale. 0 Comment
  CHSC7186  Ephedra viridis Lynn R Thomas 1969-3-6 9 Lassen 75 yds. W of US 395 ca. 26 mi ne of Susanville (nr rail and highway intersection at Viewland). 1347 Comment
  HSC1306  Ephedra viridis J. W. Bosworth 1965-5-1 31 Lassen 20 mi. N of Susanville on Hwy. 395 1220 Comment
  NY70852  Ephedra viridis N. H. Holmgren 1970-6-25 4380 Lassen North end of Petersen Mountain, near US 395, 8 miles north of junction with California 70 (Hallelujah Junction) 1524.0 Comment
  UC565391  Ephedra viridis Junea Kelly 1937-5-30 Lassen near Horse Lake Comment
  HSC16378  Epilobium anagallidifolium M. T. Milligan 1964-7-16 143 Lassen 2 mi. W on Silver Lake Rd., along Upper Susan River 1829 Comment
  SEINET10738966  Epilobium angustifolium subsp. circumvagum Andrew Townesmith, Karen M. Meyer 2007-7-20 Townesmith 838 Lassen Lassen National Forest, Eagle Lake Ranger District. Along Forest Service road 30N03, 0.5 mile from intersection with state route 36, at roadblock where two decrepit bridges cross Susanville River. T29N R11E S6 SW 1/4. 1429 Comment
  RSA0011500  Epilobium brachycarpum Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46975 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  CHSC106066  Epilobium campestre Lowell Ahart; John Dittes 2010-7-31 16996 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  CHSC113081  Epilobium campestre Lowell Ahart; John Dittes 2013-7-22 18850 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
  CHSC112448  Epilobium ciliatum subsp. ciliatum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18740 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
  JEPS43851  Epilobium ciliatum subsp. ciliatum W. L. Jepson 1939-8-11 19378 Lassen Milford 1280 Comment
  RSA0105585  Epilobium ciliatum subsp. ciliatum Lowell Ahart, John Dittes 2013-7-22 18856 Lassen 30 yards south of the man made pond, about 120 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1191740  Epilobium ciliatum subsp. ciliatum Malcolm A. Nobs and S. Galen Smith 1949-8-20 1471 Lassen 1 mi s Milford (seepage area); Honey Lake Valley Comment
  HSC100124  Epilobium ciliatum subsp. ciliatum M. T. Milligan 1964-7-16 143 Lassen 2 mi. W on Silver Lake Rd., along Upper Susan River 1829 Comment
  JEPS117486  Epilobium densiflorum Lowell Ahart, John Dittes 2010-7-31 16994 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  RSA0105579  Epilobium densiflorum Lowell Ahart, John Dittes 2013-7-22 18878 Lassen 40 yards south of the man made pond, about 110 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CDA20353  Epilobium densiflorum H. Leach August 1949 s.n. Lassen Modoc Plateau; Madeline Plain. 0 Comment
  JEPS88515  Epilobium hallianum Vernon H. Oswald and Lowell Ahart 1996-6-24 7849 Lassen 2.5 mi. s. Eagle Lake (Papoose Meadows located ca. 0.5 mi. e. of Eagle Lake Rd. (A1), w. side of meadow just s. of the cabins, Modoc Plateau); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1924264  Epilobium hallianum Debra Valov 2005-8-20 2005226 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CHSC77220  Epilobium oregonense G. Schoolcraft 1993-7-20 2330 Lassen About 1 mile s. of Boot Lake. Along creek. 1950 Comment
  UC1609447  Epilobium oregonense Vernon H. Oswald and Lowell Ahart 1993-8-3 5741 Lassen just e Caribou Wilderness (e of Silver Lake, ca 13 air mi n of Lake Almanor); Cooper Swamp 1932 Comment
  SEINET10453023  Epilobium oregonense Mary Susan Taylor 1974-1 Taylor 279 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC725478  Epilobium pallidum A. A. Heller 1938-7-28 15295 Lassen meadow edge of a swamp about 2 mi e Westwood 1524 Comment
  CHSC99141  Epilobium torreyi Lowell Ahart; John Dittes 2008-6-19 14878 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
  HSC82195  Epilobium torreyi Thomas W. Nelson, Jane P. Nelson 1980-7-6 6050 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  CHSC4941  Equisetum laevigatum W. Lessig 1967-7-10 15 Lassen Coll. 3 1/2 mi. se Eagle Lake Biology Station, Upper Murrer's Meadow. 1524 Comment
  RSA719899  Equisetum laevigatum Michael A. Vincent, K. Levings 2006-7-29 12905 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  SEINET4568218  Eragrostis cilianensis G. Schoolcraft 1998-8-4 2802 Lassen Along HWY 395 at Viewland Monument 1378 Comment
  JEPS94837  Eragrostis pectinacea var. pectinacea Vernon H. Oswald and Lowell Ahart 1998-9-8 9578 Lassen Highway 299 at the Rail Road overpass on the e side of Nubieber Nubieber; , Highway 299 1255 Comment
  SBBG69966  Eremogone congesta S. W. Hutchinson -Jun-1925 69 Lassen Eagle Lake 1554 Comment
  CHSC60826  Eremogone congesta var. congesta Vernon H. Oswald; Lowell Ahart 1993-6-28 5582 Lassen Harvey Valley Rd. (33N02), 1.2 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  CHSC87106  Eremogone congesta var. congesta L. P. Janeway 2001-6-20 7191 Lassen High Cascade Range. South side of the junction of the '22' road and Road 34N41; about 5.6 km south of Dixie Valley and 8.9 km north of Harvey Mountain. 1560 Comment
  SEINET8821547  Eremogone congesta var. subcongesta G. Schoolcraft 1998-6-30 2746 Lassen N end of Fort Sage Mountains. 1859 Comment
  CAS-BOT-BC159991  Eremothera boothii subsp. alyssoides Arnold Tiehm 1980-5-29 5754 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel 1231 Comment
  CAS-BOT-BC159993  Eremothera boothii subsp. alyssoides A. A. Heller 1938-6-23 15212 Lassen North of Balls Canyon on U. S. Highway #395 Comment
  JEPS14040  Eriastrum wilcoxii Rimo Bacigalupi with G. T. Robbins 1955-7-21 5418 Lassen along Smoke Creek rd. 6.8 mi e U.S. Highway 395 (s edge of valley); Secret Valley Comment
  JEPS69069  Eriastrum wilcoxii Walter Bryant July 1888 Lassen Comment
  UC134007  Eriastrum wilcoxii Walter Bryant July 1888 Lassen Comment
  CAS-BOT-BC286607  Ericameria bloomeri Gary Schoolcraft 1984-8-21 1367 Lassen Eastern slopes of Fredonyer Mtn. 33-12-35 2072 Comment
  UC1118663  Ericameria bloomeri H. P. Hagge 1929-9-11 15 Lassen Logan Mt. Eagle Lake Quad., Logan Mtn. 1828 Comment
  UC1776669  Ericameria bloomeri G. Schoolcraft 1994-9-13 2428 Lassen Just above gate along road to Fredonyer Pk. lookout 2255 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
  CAS-BOT-BC287478  Ericameria greenei Ralph K. Gierisch 1968-7-11 3348 Lassen Harvey Valley, Lassen Forest 1676 Comment
  SEINET7950731 Image available Ericameria nauseosa var. hololeuca Unknown 1921-9-11 s.n. Lassen South side of Honey Valley Comment
  CAS-BOT-BC298174  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-6 2403 Lassen Honey Lake Valley, 3 miles from Wendel on the road to Janesville 1219 Comment
  UC527348  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-6 Lassen 3 mi from Wendel (on the road to Janesville); Honey Lake Valley 1219 Comment
  CAS-BOT-BC294187  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True 1973-8-1 50217 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  UC773958  Ericameria nauseosa var. speciosa L. R. Short 1936-9-30 S- 504 Lassen Burgess Spring Experiment Range Lassen Forest 1755 Comment
  CAS-BOT-BC293010  Ericameria parryi var. nevadensis C. B. Wolf 1931-9-6 2405 Lassen 1/2 mile from Janesville on the road to Wendel - Western edge of Honey Lake Valley 1280 Comment
  UC1776655  Ericameria parryi var. nevadensis G. Schoolcraft 1998-8-19 2803 Lassen N upper slope of Shaffer Mountain 1981 Comment
  CAS-BOT-BC293205  Ericameria suffruticosa John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 5068 Lassen Summit ridge of Diamond Mt. 2346 Comment
  RSA121426  Erigeron aphanactis E. Sawyer 1935-6-27 238 Lassen Long Valley 1341 Comment
  UC1561814  Erigeron aphanactis var. aphanactis Barbara Ertter with Gary Schoolcraft 1987-6-16 7176 Lassen on ne side Honey Lake (e of road over saddle on w side of range); Skeedaddle Mountains 1645 Comment
  CAS-BOT-BC293524  Erigeron aphanactis var. aphanactis Mrs. H. C. Cantelow 1941-5-24 s.n. Lassen Ball's Canyon, south of Secret Valley Comment
  CHSC112184  Erigeron aphanactis var. congestus Dean Wm. Taylor 2012-6-7 21229 Lassen Flora of the Modoc Plateau. Grasshopper Valley; Grasshopper Valley Road 2.3 road miles E of junction with Highway 139. 1635 Comment
  JEPS117490  Erigeron bloomeri var. bloomeri Lowell Ahart, John Dittes 2010-7-31 17010 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1510 Comment
  UC1136835  Erigeron bloomeri var. bloomeri L. R. Short and J. Warren 1936-6-23 S- 451 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1741 Comment
  CAS-BOT-BC294487  Erigeron bloomeri var. bloomeri Ella Dales Cantelow 1941-5-22 3566 Lassen 2 1/ mi. n. of Secret Valley C.C.C. Camp. U.S. Hy 395 Comment
  CHSC5207  Erigeron breweri 1944-6-30 Lassen Eagle Lake. Grasshopper Valley. 1584 Comment
  CAS-BOT-BC296847  Erigeron divergens John Thomas Howell; Alice Eastwood 1940-6-16 8340 Lassen Janesville Comment
  CHSC65297  Erigeron divergens Vernon H. Oswald; Lowell Ahart 1995-8-14 7193 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) 2.5 mi W of Hwy. 395 at a small stream, N of Susanville. 1676 Comment
  JEPS127714  Erigeron divergens Alejandro Brambila, Michael Dolan 2016-7-20 CA 320 -169 Lassen Railroad trail north of Tule Mountain. Collection is North of gate on Modoc-Lassen county line. Comment
  CAS-BOT-BC295978  Erigeron divergens Gary Schoolcraft 1984-9-4 1372 Lassen Fredomyer Mtn. 1737 Comment
  CAS-BOT-BC300372  Erigeron eatonii var. plantagineus John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50688 Lassen South and southeast of Diamond Mt. 2286 Comment
  JEPS87524  Erigeron eatonii var. plantagineus Vernon H. Oswald and Lowell Ahart 1993-6-14 5505 Lassen Lassen A21 (32N02) 2.1 mi e Lassen 105 (32N28Y) (se side of valley, ca 8 air mi w of Eagle Lake); Pine Creek Valley 1728 Comment
  UC1587058  Erigeron eatonii var. plantagineus G. Schoolcraft 1991-6-18 2162 Lassen along Hwy 139 4 mi w Said Valley Res. 1706 Comment
  UC773845  Erigeron eatonii var. plantagineus L. R. Short 1936-5-22 S- 350 Lassen Burgess Spr. Exp. Range Lassen <National> Forest 1859 Comment
  UC87584  Erigeron eatonii var. plantagineus T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  CHSC67164  Erigeron eatonii var. sonnei James D. Jokerst 1991-5-29 3301 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
  CAS-BOT-BC300425  Erigeron elegantulus Roxana S. Ferris; Rena Duthie 1919-6-12 20 Lassen Madeline Comment
  CHSC101040  Erigeron elegantulus John Dittes 2008-5-22 1523 Lassen Modoc Plateau; ca. 15.3 air miles southeast of Adin, ca. 3.4 air miles east of Hayden Hill, ca 300 feet north by northeast of intersection of Hwy 139 and FS Road 36N02; open, rocky volcanic toe-slope on northeast side of Willow Creek. 482 Comment
  JEPS95131  Erigeron elegantulus Vernon H. Oswald and Lowell Ahart 1997-5-27 8492 Lassen w side of Hwy 139 s of Willow Creek Guard Station 0.9 mi s of Forest Road 38N04 to Coyote Flat Coyote Flat; Hwy 139 1577 Comment
  CHSC80592  Erigeron filifolius var. filifolius Vernon H. Oswald; B. Corbin, K. Earll, G. Schoolcraft 2001-6-2 10035 Lassen Northeast of Doyle in the Fort Sage Mtns, trail to top of mountain from the end of a 4WD road. 1828 Comment
  CAS-BOT-BC295184  Erigeron inornatus John Thomas Howell; Gordon H. True 1973-8-1 50157 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CHSC88611  Erigeron inornatus var. calidipetris Linnea Hanson 1998-8-11 378 Lassen Lassen National Forest. Off Hwy. A21 north of Westwood. 1524 Comment
  UC1136838  Erigeron inornatus var. inornatus L. R. Short and D. Gish 1936-8-3 S- 397 Lassen Burgess Spr. Exp. Range Lassen National Forest, Burgess Spr. Exp. Range 1795 Comment
  CHSC68844  Erigeron linearis Vernon H. Oswald; Lowell Ahart 1997-6-24 8608 Lassen South of Susanville on the north side of Diamond Mtn. at slope along Forest Rd. 29N43, 5.4 miles east of Gold Run Rd. (29N10), 0.7 mi east of Lassen NF boundary. At roadside. 1889 Comment
  JEPS94538  Erigeron linearis Vernon Oswald and Lowell Ahart 1997-6-24 8608 Lassen 0.7 mi e of boundary of Lassen National Forest (5.4 mi e of Gold Run Road (29N10), s of Susanville, on n side of Diamond Mountain along Forest Road 29N43); Diamond Mountain along Forest Road 29N43 1889 Comment
  RSA713117  Erigeron linearis L. P. Janeway, B. Castro 2005-7-10 8485 Lassen Northern High Sierra Nevada. Crest of Diamond Mountains overlooking the NW end of Honey Lake, more or less at the north end of Stony Ridge. 1993 Comment
  UC585085  Erigeron linearis E. B. Babcock, G. L. Stebbins Jr. 1936-6-8 1792 Lassen about 5 mi N of Terno 1371 Comment
  CAS-BOT-BC295237  Erigeron lonchophyllus G. Schoolcraft 1999-6-29 2848 Lassen E. edge of Madeline Plains about 9 mi. ne of Ravendale 1615 Comment
  CHSC77195  Erigeron nevadincola G. Schoolcraft 1998-6-30 Lassen N. slope of Ft. Sage Mtns. 1950 Comment
  CHSC30580  Erigeron philadelphicus Sori H. Shad 1970-6-25 46 Lassen 3 mile from E.L.B.S. in Meadow. 1524 Comment
  SJSU6631  Erigeron philadelphicus var. philadelphicus H. L. Buckalew 1961-7-9 Lassen spring by Blue Lake, Warner Mountains 1920 Comment
  JEPS94532  Erigeron pumilus var. intermedius Vernon Oswald and Lowell Ahart 1997-6-24 8648 Lassen s of Susanville (at the small pond on the crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
  UC506996  Erigeron pumilus var. intermedius George A. Fischer and Irwin H. Johnson 1933-7-12 F 209 Lassen Grass Valley 1700 Comment
  UC76008  Erigeron pumilus var. intermedius Milo S. Baker 1890-1 Lassen Honey Lake Valley, near Milford; Honey lake Valley Comment
  CAS-BOT-BC300119  Erigeron pumilus var. intermedius Clare B. Hardham 1961-6-17 7504 Lassen Sierra Nevada Mountains. Baxter Creek 1676 Comment
  UC762677  Eriogonum baileyi R. F. Hoover 1940-10-1 4649 Lassen Johnstonville Comment
  CAS-BOT-BC241568  Eriogonum baileyi var. baileyi Margaret Williams; Steven Williams 1974-7-26 74 -L-25 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  SEINET3836451 Image available Eriogonum baileyi var. baileyi W. L. Jepson 1918-8-2 7772 Lassen Beckwith Pass 1463 Comment
  NY242501  Eriogonum collinum N. H. Holmgren 1980-7-3 9485 Lassen U.S. Highway 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  NY242503  Eriogonum collinum N. H. Holmgren 1964-8-22 1723 Lassen 48 miles northeast of Susanville, 4 miles south of Ravendale. Comment
  CHSC99120  Eriogonum douglasii var. meridionale Lowell Ahart; John Dittes 2008-6-19 14895 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS118162  Eriogonum douglasii var. meridionale Dean W. Taylor 2009-5-21 20603 Lassen Susanville; Susanville Peak, northerly flank along logging roads ca. 1.5 air miles E of Round Valley Reservoir 1706 Comment
  CAS-BOT-BC246500  Eriogonum douglasii var. meridionale Parkison & Party 1916-6-8 8 Lassen Lassen National Forest, Sage type, Harvey Valley 1676 Comment
  SEINET10479490  Eriogonum elatum Taylor 1982-8-27 Taylor 5055 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
  UCSC005349  Eriogonum elatum Randall Morgan 1998-7-20 3319 Lassen Hwy 144 west of Susanville Comment
  CAS-BOT-BC255743  Eriogonum elatum var. villosum Clare B. Hardham 1969-8-28 17459 Lassen West of Janesville, Sierra Nevada Comment
  RSA766386  Eriogonum eximium Susan Hutchinson 1929-12 857 Lassen Desert slope of Sierra Nevada, Lassen. 1220 Comment
  RSA125289  Eriogonum maculatum Peter H. Raven, Otto T. Solbrig 1958-6-17 13271 Lassen Along U.S. Highway 395, 19.0 miles south of Ravendale. Comment
  RSA0009584  Eriogonum maculatum Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  RSA780322  Eriogonum marifolium Elizabeth A. Kempton 2007-8-15 509 Lassen Lassen National Forest, Lassen Peak ca. 0.25 mile along trail from trailhead/parking lot. 2678 Comment
  POM105455  Eriogonum microtheca var. ambiguum Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  RSA518445  Eriogonum microtheca var. ambiguum George K. Helmkamp 1990-9-23 D- 9 Lassen 20 miles N of Litchfield along U.S. Hwy 395 1433 Comment
  CHSC84392  Eriogonum microthecum var. ambiguum Lowell Ahart 2003-8-17 10518 Lassen Small drainage, 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. 1450 Comment
  UC1523724  Eriogonum microthecum var. ambiguum Gary Schoolcraft 1982-8-18 898 Lassen s Doyle Grade Road (w of Doyle) 1584 Comment
  UC7867810  Eriogonum microthecum var. ambiguum R. F. Hoover 1940-9-28 4636 Lassen canyon n Leavitt Comment
  UCR67383  Eriogonum microthecum var. ambiguum George K. Helmkamp 1990-9-23 D- 9 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  CAS-BOT-BC268688  Eriogonum microthecum var. laxiflorum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50656 Lassen Summit ridge of Diamond Mt. 2346 Comment
  SD64343  Eriogonum microthecum var. laxiflorum D. F. Howe 1966-8-24 Lassen 39 miles northeast of Litchfield on hwy #395 1676 Comment
  UC585235  Eriogonum microthecum var. laxiflorum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1753 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  NY803607  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 2003-9-22 2949 Lassen About 3 miles northwest of Constantia, CA 1 mile west on FS Road 24N22X 1417 Comment
  SJSU9529  Eriogonum nudum var. deductum J. W. Tilden 1960-6-27 1492 Lassen Westwood 1524 Comment
  UCR67381  Eriogonum nudum var. nudum George K. Helmkamp 1990-10-4 M 4 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  CHSC23478  Eriogonum nudum var. pubiflorum Wayne O. Baum 1971-7-9 71 -80 Lassen N. slope of Gallatin Peak. 2042 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
  UC1542949  Eriogonum nudum var. pubiflorum G. Schoolcraft 1987-7-8 1759 Lassen about 8 mi s Adin (Lonkey Hill); Lonkey Hill 1463 Comment
  UC1542952  Eriogonum nudum var. pubiflorum G. Schoolcraft 1987-9-9 1778 Lassen 3 mi n Bieber; Ash Creek Wildlife Area 1258 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
  CAS-BOT-BC266813  Eriogonum nummulare John Thomas Howell 1951-8-20 28228 Lassen Honey Lake Valley near Hurlong 1280 Comment
  OBI76940  Eriogonum ovalifolium var. purpureum Anthony Baniaga 2011-7-9 439 Lassen Lassen Natl forest. Windy Hollow. Pine Crk Valley quad. T31N R8E sec 15 NE of SE 1716 Comment
  SEINET516318  Eriogonum ovalifolium var. purpureum Vernon H. Oswald 1998-9-14 9627 Lassen Windy Hollow on the W side of Hwy. 44 ca. 1 mi NW of its intersection with A21 (to Westwood). 1737 Comment
  UC1735877  Eriogonum prociduum Dean W. Taylor 1992-5-7 12543 Lassen Ash Valley, ca. 1.5 miles SW of Ash Valley cemetary Comment
  CHSC64845  Eriogonum prociduum var. prociduum Vernon H. Oswald 1995-6-26 6939 Lassen Modoc Plateau. Spooner Rd. ca. 0.3 - 0.4 mi e of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  RSA780054  Eriogonum pyrolifolium Elizabeth A. Kempton 2007-8-15 510 Lassen Lassen National Forest, Lassen Peak ca. 0.25 mile along trail from trailhead/parking lot. 2678 Comment
  POM203845  Eriogonum spergulinum var. reddingianum J. T. Howell 1934-7-6 12446 Lassen Harvey Valley Comment
  CAS-BOT-BC272628  Eriogonum spergulinum var. reddingianum H. D. Ripley; R. C. Barneby 1943-6-13 5705 Lassen South of Milford 1859 Comment
  NY283094  Eriogonum sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen South of Secret Valley on U.S. Highway 395. Upper Sonoran Life Zone. 1371.6 Comment
  SBBG65540  Eriogonum sphaerocephalum S. W. Hutchinson -Jun-1925 858 Lassen near Susanville 1219 Comment
  CHSC60914  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald; Lowell Ahart 1993-7-8 5674 Lassen Halls Flat rd. (33N18), 1.4 mi SSW of Pittville Rd. (Lassen 111, 36N01), ca. 5.4 mi (air) NW of Poison Lake. On an open sagebrush flat on the E side of the road. 1694 Comment
  JEPS93796  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald 1998-7-6 9246 Lassen 2.7 mi se of Highway 36 (Shugru Reservoir in Bass Hill [WA] on Highway 395 between Susanville and Janesville); Shugru Reservoir, Bass Hill 1243 Comment
  CAS-BOT-BC262738  Eriogonum sphaerocephalum var. sphaerocephalum A. R. Kruckeberg 1954-6-22 3323 Lassen Between Susanville and Janesville on Highway 395 Comment
  JEPS56418  Eriogonum sphaerocephalum var. sphaerocephalum Hilda W. Grinnell 1934-5-31 Lassen near Susanville (mouth of Piute Creek Canyon); Piute Creek Canyon Comment
  SEINET11261384  Eriogonum sphaerocephalum var. sphaerocephalum Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9499 Lassen Observation Peak, south side of mountain, 19 km (11.5 mi) airline distance east-southeast of Ravendale.; 0 1830 Comment
  UC726566  Eriogonum sphaerocephalum var. sphaerocephalum A. A. Heller 1938-6-23 15214 Lassen s Secret Valley (on U. S. Highway #395) 1371 Comment
  NY283175  Eriogonum strictum subsp. proliferum W. W. Eggleston 1911-7-7 7173 Lassen Secret Valley 1330 Comment
  CHSC13650  Eriogonum strictum var. anserinum M. S. Taylor 1974-6-20 256 Lassen Ca. 500 yds n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1554 Comment
  RSA768778  Eriogonum strictum var. anserinum L. Ahart, John Dittes 2010-7-31 16989 Lassen About 2300 feet north of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin. 1511 Comment
  JEPS85787  Eriogonum strictum var. proliferum Roy E. Buck, Robert A. Price 1988-6-26 1028 Lassen on subsidiary peak ca. 0.5 air km n main summit (Fredonyer Peak; ca. 30 air km nne of Susanville); Fredonyer Peak 2377 Comment
  UCD149821  Eriogonum strictum var. proliferum William Anderson 1963-6-2 s.n. Lassen Lassen County. Comment
  HSC63828  Eriogonum umbellatum Teresa Prendusi 1980-7-14 Lassen Ash Valley, about 15 mi. W of Madeline along Ash Valley Rd. 1524 Comment
  SBBG64170  Eriogonum umbellatum D. Crofton-Atkins 1931-6-7 Lassen Susanville 1310 Comment
  CAS-BOT-BC267888  Eriogonum umbellatum Hans Leschke 1957-9-21 1527 Lassen Rim of Cinder Cone Crater, Lassen Volcanic National Park 2087 Comment
  RSA0029317  Eriogonum umbellatum John F. Emmel 1997-6-8 1489 Lassen At Hwy 395 crossing of Secret Creek, on slope 0.1-0.2 air mi SSE of the crossing, 2.7 road mi north of Karlo Road junction. 1402 Comment
  CHSC99123  Eriogonum umbellatum var. modocense Lowell Ahart; John Dittes 2008-6-19 14882 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  JEPS56179  Eriogonum umbellatum var. modocense Brown and Wieslander 1922-7-23 7 Lassen Martin Sprs., Eagle Lake Comment
  UC849718  Eriogonum umbellatum var. modocense A. A. Heller 1938-7-23 15190 Lassen 3 mi e Westwood 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-BC265094  Eriogonum umbellatum var. nevadense Ira L. Wiggins; Dorothy B. Wiggins 1961-6-11 16361 Lassen Near NE end of Eagle Lake Comment
  CHSC14170  Eriogonum umbellatum var. nevadense K. R. Stern 1974-6-26 5867 Lassen E end of Champs Flat. Comment
  CHSC68902  Eriogonum umbellatum var. nevadense Vernon Oswald; Lowell Ahart 1997-6-24 8640 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  JEPS107821  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
  POM253245  Eriogonum umbellatum var. nevadense A. A. Heller 1938-6-23 15215 Lassen Grassy, gravelly slope between Secret Valley and Ravendale. 1524 Comment
  RSA62913  Eriogonum umbellatum var. nevadense B. J. Cox, David B. Dunn 1971-6-2 2605 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
  UC1483832  Eriogonum umbellatum var. nevadense G. Schoolcraft 1979-7-5 126 Lassen 5.2 mi. from Horne Ranch Road (intersection up Observation Lookout Road) 2286 Comment
  JEPS56205  Eriogonum ursinum Hilda W. Grinnell 1934-6-2 Lassen Fredonyer Pass 1753 Comment
  RSA766453  Eriogonum ursinum C. Epling, Wm. Robinson 1935-7-17 s.n. Lassen Chaos Crags, Lassen Park Comment
  CHSC12488  Eriogonum vimineum Carol Weld 1969-6-25 29 Lassen Murrer's Meadow. 1524 Comment
  CHSC4943  Eriogonum vimineum W. Lessig 1967-7-11 26 Lassen 3 mi se of Eagle Lake Biology Station on rd to Murrer's Meadow. 1524 Comment
  CHSC56867  Eriogonum vimineum Mary Meyer 1980-7-3 Lassen North of Jeep trail going up drainage above camping pullover. 1584 Comment
  CHSC84440  Eriogonum vimineum Lowell Ahart 2003-8-17 10516 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. 1433 Comment
  JEPS97409  Eriogonum vimineum Vernon H. Oswald and L. Ahart 1995-6-19 6882 Lassen T30N R15E NE1/4 SE1/4 Sect. 22, 4500 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395 1371 Comment
  NY399613  Eriogonum vimineum N. H. Holmgren 1980-7-3 9493 Lassen Rye Patch Canyon road, 3.4 km (2.1 miles) east of U.S. Highway 395, 14.5 km (9 miles) airline distance southeast of Ravendale 1700 Comment
  RSA125290  Eriogonum vimineum Peter H. Raven, Otto T. Solbrig 1958-6-17 13272 Lassen Along Hwy 395, 19.0 miles south of Ravendale Comment
  SEINET11261381  Eriogonum vimineum Robert L. Johnson, Mikel R. Stevens 2015-7-10 3924 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
  CAS-BOT-BC262355  Eriogonum vimineum David D. Keck 1930-7-23 951 Lassen Susanville 1280 Comment
  POM260787  Eriogonum vimineum Alice Eastwood, John T. Howell 1940-6-16 8343 Lassen Janesville. Comment
  SDSU7202  Eriogonum vimineum D. F. Howe 1960-9-21 2994 Lassen 2.0 Miles north of Janesville. 1219 Comment
  CHSC96443  Eriophorum gracile Gordon Leppig; T. LaBanca, L. Arguello 1997-6-28 508 Lassen Modoc National Forest. Blue Lake Ranch. 1970 Comment
  HSC95298  Eriophorum gracile Gordon Leppig, Tony LaBanca 1997-6-29 531 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CDA20364  Eriophyllum lanatum D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat Grade. 0 Comment
  CHSC4435  Eriophyllum lanatum K. R. Stern 1967-7-1 2443 Lassen Murrer Meadow Road, ca. 2.5 mi. SE of Eagle Lake Biology Station. 1554 Comment
  CHSC5210  Eriophyllum lanatum W. Vinyard 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  CHSC92740  Eriophyllum lanatum var. achilleoides L. P. Janeway 2005-7-3 8453 Lassen High Cascade Range. Junction of Road 35N38 (road to Blacks Ridge Lookout Tower) and Road 22; 3.7 air km north-northwest of the lookout. 1536 Comment
  JEPS103221  Eriophyllum lanatum var. achilleoides G. Schoolcraft 1991-7-30 2199 Lassen E. slope of widow mountain 1859 Comment
  POM253262  Eriophyllum lanatum var. achilleoides A. A. Heller 1938-6-23 15197 Lassen Ridge east of Fredonyer Pass on Highway 36 1646 Comment
  UC1136991  Eriophyllum lanatum var. achilleoides L. R. Short and J. Warren 1936-6-29 S 459 Lassen Burgess Spr. Exp. Range Lassen Forest, Burgess Spr. Exp. Range 1822 Comment
  CAS-BOT-BC308139  Eriophyllum lanatum var. achilleoides Clarence R. Quick 1964-7-29 64 -85 Lassen Blacks Mt. Experivmental Forest 1798 Comment
  CHSC7648  Eriophyllum lanatum var. grandiflorum Beverley J. Wise 1969-5-15 18 Lassen 28.9 mi. east of Susanville on Hwy 395. 1554 Comment
  JEPS117575  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-BC301532  Eriophyllum lanatum var. integrifolium 1927-7-1 50 Lassen Lassen National Forest. Bogard Ranger Station 1712 Comment
  CHSC59683  Eriophyllum lanatum var. integrifolium Mary Meyer 1980-5-7 Lassen Mesa between Pete's Creek. 1447 Comment
  JEPS29200  Eriophyllum lanatum var. integrifolium Lauramay T. Dempster 1961-6-17 1677 Lassen about 8 mi n of Karlo Road junction with Hwy. 395 1584 Comment
  UC1137628  Eriophyllum lanatum var. integrifolium A. Simontacchi 1940-6-5 816 Lassen 8.3 mi wnw of Harvey Valley Ranger Station; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1368789  Eriophyllum lanatum var. integrifolium John L. Strother 1970-5-23 956 Lassen about 6 mi n Honey Lake 1280 Comment
  CHSC7701  Erodium cicutarium Beverley J. Wise 1969-4-28 43 Lassen Susanville City Limits - Junction of Chestnut Sty. and Hwy 139, South side of Chestnut St. 1310 Comment
  RSA715976  Erodium cicutarium L. Ahart, John Dittes 2005-6-2 11923 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4.75 miles (air) N of the intersection of Scott Road and Hwy 70, 6.2 miles (air) NW of Hallelujah Junction. 1460 Comment
  UC1487305  Eryngium alismifolium Yusuf Sheikh and Lincoln Constance 1973-6-27 549 Lassen 4.3 mi S of Ravendale (on State Highway 395) 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
  UC809839  Eryngium alismifolium G. L. Stebbins Jr. with P. Dansereau, C. McMillan, and K. Narayan 1949-8-5 4000 Lassen n.w. Susanville (Hog Flat); Hog Flat 1676 Comment
  JEPS66442  Eryngium articulatum L. R. Heckard and P. Rubtzoff 1971-8-3 2703 Lassen 1.3 mi. w. of Pit R. bridge at Bieber 1219 Comment
  UC1533163  Erysimum capitatum G. Schoolcraft 1986-4-28 1529 Lassen lower w slopes Ft. Sage Mtns. 1432 Comment
  CHSC60857  Erythranthe breweri Vernon H. Oswald; Lowell Ahart 1993-6-28 5610 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
  SBBG15427  Erythranthe breweri H. and M. Dearing 1939-7-1 2244 Lassen 17 mi W of Susanville Comment
  SEINET8340800  Erythranthe floribunda Unknown 2005-6-2 11970 Lassen Long Valley, about 4 1/2 miles (air) northweast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  CHSC118855  Erythranthe guttata L. P. Janeway; B. Castro 2015-6-5 11770 Lassen Great Basin, Modoc Plateau. Along County Road 512 16.9 road-km south from Surprise Valley Road towards Tuledad Canyon; in a small northwestern drainage into Post Canyon. 1837 Comment
  CHSC30599  Erythranthe guttata Marc Held 1972-6-23 9 Lassen Upper Murrer's Meadow along spring red stream. 4.5 miles south-east of E.L.B.S. (approx.). Comment
  CHSC7752  Erythranthe guttata Beverley J. Wise 1969-5-18 107 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. Comment
  CAS-BOT-BC151473  Erythranthe latidens James Jokerst 1983-7-23 1872 Lassen Grasshopper Valley Quad., near Madeline Plains 1614 Comment
  CAS-BOT-BC153611  Erythranthe moniliformis Clare B. Hardham 1971-8-22 18384 Lassen Diamond Mountain 2133 Comment
  CHSC20262  Erythranthe primuloides Jeanne Pitts 1972-6-25 274 Lassen 150 yds upstream off road 4.25 mi on Papoose Creek, 10 yds from the creek. 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
  UCD139645  Erythronium multiscapideum W. W. Robbins 1926-4-17 541 Lassen Grass Valley. Comment
  CAS-BOT-BC403148  Eschscholzia californica John Thomas Howell 1974-7-8 50472 Lassen Susanville 1295 Comment
  UC146043  Eschscholzia californica Jos. Burtt Davy June 1897 Lassen Amedee Comment
  JEPS117958  Eucephalus breweri Zoya Akulova-Barlow Sep 2006 Lassen Sierra Nevada, Dyer Mountain Comment
  CDA3706  Euclidium syriacum E. E. Fix 1951-6-8 Lassen 0 Comment
  SEINET11989048  Euclidium syriacum Unknown 1966-1 712 Lassen Frosty Acres ranch, at end of Albaugh Rd, 0.6 mi W of jct with Bassett Rd (ca 2 mi S of US 299 & 4 1280 Comment
  CHSC5248  Euphorbia crenulata L. Harman 1946-6-23 Lassen Eagle Lake. Near top of Roop Mt. 2133 Comment
  CDA35315  Euphorbia crenulata T. C. Fuller 1963-6-12 10666 a Lassen 0.1 mile east of Clear Creek, northeast shore of Lake Almanor. 0 Comment
  JEPS31883  Eurybia integrifolia Brown and Wieslander 1922-7-30 14 Lassen Martin Springs Eagle Lake Comment
  RSA0027354  Festuca John F. Emmel 1994-7-17 1329 Lassen Summit area of Observation Peak. 2378 Comment
  CAS-BOT-BC278431  Festuca idahoensis John Thomas Howell 1934-7-6 12448 Lassen Harvey Valley Comment
  POM203057  Festuca idahoensis J. T. Howell 1934-7-6 12430 Lassen Hall's Flat. Comment
  UC1024811  Festuca idahoensis Leo Whitney 1935-6-17 3268 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UCD65977  Festuca idahoensis L. Whitney 1935-6-23 3295 Lassen Fruit Growers Supply Co. Camp #10. Comment
  UCR17288  Festuca idahoensis Frank C. Vasek 1975-7-11 750711- 04 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 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
  UC1024937  Festuca occidentalis Leo Whitney 1935-6-27 3337 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest 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
  UC1024808  Festuca rubra Leo Whitney 1935-6-23 3284 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1130345  Floerkea proserpinacoides Robert W. Gardner 1937-6-14 G 4 Lassen Burgess Spring Experiment Range 1798 Comment
  CAS-BOT-BC459438  Fragaria virginiana subsp. platypetala Louella Bass 1973-4-13 15 Lassen Elysian Valley, Sierra Nevada 1325 Comment
  SJSU6086  Frasera albicaulis var. nitida J. W. Tilden 1960-6-27 1509 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  CHSC36488  Fritillaria atropurpurea Theresa Costa 1982-6-5 39 Lassen Along e slope Gallatin Mountain. Comment
  HSC26683  Fritillaria atropurpurea D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19251 Lassen Harvey Valley near Cone Springs Comment
  UC1134589  Fritillaria atropurpurea K. E. Bradshaw 1939-3-27 232 Lassen s end of Black Mountain Experimental Forest, Lassen National Forest Black Mountain Experimental Forest; Lassen National Forest, Black Mountain Experimental Forest 1752 Comment
  RSA122218  Fritillaria atropurpurea K. e. Bradshaw 1939-5-27 232 Lassen Lassen Forest. S. end Black Mt. Experimental Forest, Plot 39-1. 1753 Comment
  CHSC61690  Fritillaria pudica Julie L. Brown 1986-3-27 Lassen Ca. 50 m n of Eagle Lake Field Station on path to the marsh. Ca. 20 km n of Susanville. 1667 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
  CHSC60766  Galium aparine Vernon H. Oswald; Lowell Ahart 1993-6-14 5548 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
  UC1479580  Galium multiflorum G. Schoolcraft 1980-6-6 253 Lassen sw Herlong; Bird Canyon area 1341 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
  CHSC66866  Galium trifidum var. pusillum Vernon H. Oswald; Lowell Ahart 1996-9-10 8275 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  CDA18258  Gayophytum diffusum subsp. parviflorum G. D. Barbe 1974-8-2 1920 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UC1137737  Gayophytum diffusum subsp. parviflorum George A. Fischer and Irwin H. Johnson 1933-7-14 F 247 Lassen Lassen National Forest 1767 Comment
  POM38695  Gayophytum heterozygum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  HSC63969  Gayophytum humile Teresa Prendusi 1980-7-1 1121 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  RSA517182  Gayophytum humile J. T. Howell, Gordon H. True 1973-8-1 50207 Lassen Sierra Nevada: Headwaters of Baxter Creek, east slope of Diamond Range, south of Susanville. 2165 Comment
  POM203958  Gayophytum racemosum J. T. Howell 1934-7-7 12473 Lassen Harvey Valley. Comment
  POM38703  Gayophytum racemosum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  NY999656  Gayophytum ramosissimum J. T. Howell 1974-7-8 50463 Lassen Susanville 1295 Comment
  SEINET4172075  Gayophytum ramosissimum M. J. Williams 1974-7-26 74 - L-32 Lassen 2 mi. west of Hallelujah Junction, south of Hwy 70 1494 Comment
  UCD55160  Gayophytum ramosissimum Ellen Dean 2006-5-15 3048 Lassen E of town of Susanville. Along C.R. A27 (Center Rd.) Grounds of California Correctional Facility. 1248 Comment
  CAS-BOT-BC217396  Gentiana affinis var. ovata Louella Bass; E. Lagel 1976-9-1 s.n. Lassen Willard Creek near confluence with Susan River, Sierra Nevada Comment
  SEINET8586424  Gentiana newberryi C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  UC1037192  Gentiana newberryi Leo Whitney 1934-7-20 1505 Lassen ca 14 mi w Eagle Lake (Harvey Valley Spring); Lassen National Forest, Harvey Valley 1737 Comment
  UC303061  Gentiana newberryi Pearl Safford Lassen Susanville [uncertain locality] Comment
  UC1037272  Geranium viscosissimum Leo Whitney 1934-7-10 1766 Lassen ca 14 mi w Eagle Lake (near Harvey Valley Spring); Lassen National Forest, Harvey Valley 1737 Comment
  RSA454250  Geum macrophyllum Roch Well 1929-7-1 s.n. Lassen [Unspecified] Comment
  CAS-BOT-BC143569  Geum triflorum Clarence Quick 1963-7-12 63 -34 Lassen Blacks Mountain Experimental Forest east of Halls Flat 1859 Comment
  CHSC106568  Gilia inconspicua K. Schierenbeck 2008-5-3 Lassen Fort Sage Mtns. 1439 Comment
  JEPS94902  Gilia inconspicua Vernon H. Oswald and Lowell Ahart 1998-6-4 9146 Lassen s of Constantia (spur road on n side of Red Rock Road 0.6 mi e of Highway 395); n side of Red Rock Road 1389 Comment
  RSA95714  Gilia modocensis Verne Grant, Alva Grant 1955-6-8 9666 A Lassen c. 2 miles north of Doyle. 1311 Comment
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May 2 2012
  RSA95716  Gilia modocensis Verne Grant 1955-6-8 9666 Lassen c. 2 miles north of Doyle. 1311 Comment
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May 2 2012
  CHSC93697  Gilia ochroleuca Lowell Ahart; John Dittes 2005-6-2 11990 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  CHSC25309  Gilia salticola Pauleen Broyles 1977-6-1 156 Lassen Skedaddle Ranch Road at South Fork Reservoir turn-off, ca 8 km ne of Herlong. 1660 Comment
  JEPS69702  Gilia sinuata J. W. Blankinship 1911-11-29 Lassen Red Rock Comment
  RSA469630  Gilia sinuata Christopher Davidson 1975-6-7 2756 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UC1583952  Gilia sinuata G. Schoolcraft 1990-6-12 2084 Lassen about 17 mi e Ravendale (in Pine Dunes RNA); Pine Dunes RNA, e of Ravendale 1706 Comment
  CAS-BOT-BC283865  Glyceria borealis George W. Gillett 1957-7-26 922 Lassen Lassen Volcanic National Park. Near shore of Butte Lake 1844 Comment
  UCD66836  Glyceria elata John Thomas Howell; Gordon H. True, M. Williams 1973-6-28 49473 Lassen Sierra Nevada. Elysian Valley west of Janesville. 1325 Comment
  CAS-BOT-BC302594  Gnaphalium palustre John Thomas Howell; Gordon H. True 1973-8-1 50211 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  UC1483835  Gnaphalium palustre G. Schoolcraft 1980-7-22 Lassen nw of BLM fire station (along Hwy 395) 1630 Comment
  CHSC60414  Gratiola ebracteata Mary Ann Showers 1992-6-13 2543 Lassen Shoreline at western end of Widow Lake. Lassen Volcania National Park. 2072 Comment
  CHSC31131  Grayia spinosa J. S. White 1980-4-14 118 Lassen On 2% s slope, 1 mi ne of Wendel. 1295 Comment
  JEPS59821  Grayia spinosa W. L. Jepson 1918-8-4 7806 Lassen Horse Lake 1554 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
  CAS-BOT-BC304679  Grindelia squarrosa M. S. Taylor 1982-8-19 5024 Lassen E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. 1493 Comment
  SEINET10475073  Grindelia squarrosa Mary Susan Taylor 1982-8-19 Taylor 5024 Lassen T23N R17E ne sec 23? Beckwourth Pass quad. E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. Sagebrush Scrub; 4900 ft. 1493 Comment
  CDA3429  Gypsophila paniculata T. C. Fuller 1971-10-6 19933 Lassen Northeast side of Highway 395 to Susanville, 1 mile north of Janesville. 0 Comment
  JEPS103223  Hackelia amethystina G. Schoolcraft 1981-6-12 455 Lassen Gold Run Rd. on lower slopes of Diamond Mtn. 1889 Comment
  SEINET3928294  Hackelia californica Anthony Baniaga 2011-7-9 440 Lassen Lassen National Forest. Windy Hollow. Pine Creek Valley quadrangle.; 0 1720 Comment
  UC773869  Hackelia californica L. R. Short, J. Warren 1936-6-26 S 458 Lassen Burgess Spring Experiment Range; Lassen National Forest 1853 Comment
  UC1035983  Hackelia californica Helen K. Sharsmith 1955-6-27 4517 Lassen n of Hat Creek Ranger Station (forest adjacent to Highway 89); Lassen National Forest 1158 Comment
  UC1583977  Hackelia cusickii G. Schoolcraft 1990-7-2 2099 Lassen sw slopes of Cold Spring Mountain 1950 Comment
  JEPS67931  Hackelia micrantha Jos. Grinnell 1928-6-29 Lassen Butte Lake 1889 Comment
  CDA3153  Halogeton glomeratus E. E. Fix Jun 1948 Lassen Western Railroad right-of-way. 0 Comment
  UCD165252  Halogeton glomeratus John M. Tucker 1950-7-26 1978 Lassen Southeastern part of county; Herlong, CA, Herlong Ordnance Depot; (Exact location unknown, coordinates estimated by label maker). Comment
  CDA36354  Halogeton glomeratus B. Villegas 2011-8-25 Lassen Near Wendel; on Wendel Rd., 0.4 mile from Amadee Rd. 0 Comment
  RSA97952  Halogeton glomeratus J. L. Myler, Les Berry 1954-8-17 s.n. Lassen Karlo. Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  UCD98887  Halogeton glomeratus Les Berry; J. L. Myler 1954-8-17 s.n. Lassen Karlo. Comment
  CHSC12485  Hastingsia alba Carol Weld 1969-6-26 44 Lassen 7.8 miles S. W. of Eagle Lake Field Station. 1584 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
  SBBG94823  Helianthus annuus G. K. Helmkamp 1990-9-23 A- 11 Lassen ca. 3 mi E of Susanville, along St Hwy 36 1341 Comment
  CHSC71860  Helianthus bolanderi Vernon H. Oswald; Lowell Ahart 1998-9-8 9572 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. Roadside. 1255 Comment
  CAS-BOT-BC305661  Helianthus cusickii David D. Keck; J. Clausen 1935-6-24 3739 Lassen 2 mi. S. of Ravendale 1464 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
  UC727121  Helianthus cusickii A. A. Heller 1938-6-23 15209 Lassen along Hwy 395 on ridge n Mapes Comment
  CAS-BOT-BC305663  Helianthus cusickii Elmer I. Applegate 1934-5-4 8927 Lassen South of Secret Valley Comment
  RSA0012972  Helianthus nuttallii subsp. nuttallii H. L. Mason 1947-8-11 13492 Lassen Hwy 81, west margin of Lower Lake, north boundary of Lassen County with Modoc County Comment
  SEINET3871713  Heliotropium curassavicum Richard R. Halse 2010-8-25 8086 Lassen Along State Hwy. 139 ca 26/2 miles N of Susanville on the NE shore of Eagle Lake.; 0 1559 Comment
  SEINET10497129  Heliotropium curassavicum var. oculatum Mary Susan Taylor 1974-1 Taylor 269 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC68846  Hemizonella minima Vernon Oswald; Lowell Ahart 1997-6-24 8592 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 29N43, 1.2 miles east of Gold Run Rd. (29N10). On the edge of the road. 1685 Comment
  CHSC91196  Hemizonella minima Lowell Ahart; John Dittes 2005-6-2 11940 Lassen Along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1600 Comment
  CHSC92717  Hemizonella minima L. P. Janeway; B. Castro 2005-7-10 8481 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Road 28N01 and 0.6 km east of junction of Janesville Grade Road (Road 208 and 28N02) and Road 28N01. Northerly-facing side of the crest. 1859 Comment
  SEINET11119304  Heracleum lanatum C. G. Gulling 1905-1 s.n. Lassen Big Meadows. Comment
  CHSC30620  Hesperochiron californicus Eric Miller 1975-7-9 14 Lassen E. of Dirt road adjacent to Coleman Lake, 30 ft. S. of overflow. 1950 Comment
  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
  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
  JEPS27189  Hesperolinon micranthum Lauramay T. Dempster 1961-6-17 1682 Lassen Hwy 395 just w Tule Mountain 1645 Comment
  JEPS97309  Hesperolinon micranthum Vernon H. Oswald and L. Ahart 1995-7-5 6957 Lassen T30N R16E NW1/4 NW1/4 Sec. 7, 4540 ft, Modoc Plateau, Sagebrush Scrub. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395 1383 Comment
  NY1002357  Hesperolinon micranthum G. Schoolcraft 1984-7-30 1324 Lassen About 1 mile east of Post Camp 1707 Comment
  RSA164418  Hesperolinon micranthum Clare B. Hardham 1961-6-16 7449 Lassen Gold Run Creek south of Susanville. Comment
  UCD85293  Hesperostipa comata Beecher Crampton 1954-7-6 2068 Lassen an artemisia flat, along US Hwy. 395, 1 mile east of Johnstonville. Comment
  CHSC60795  Hesperostipa comata subsp. comata Vernon H. Oswald; Lowell Ahart 1993-6-14 5542 Lassen Eagle Lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). On the N side of the road. 1566 Comment
  JEPS96087  Heterocodon rariflorum Vernon H. Oswald and Lowell Ahart 1996-6-24 7859 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi e of Eagle Lake Rd, w side Papoose Meadows, ca 0.4 mi s of the cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  POM68265  Heterocodon rariflorum Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  UCR244106  Heterotheca villosa Jim Andre, G. L. Clifton 1993-6-9 19697 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  POM34557  Heterotheca villosa var. minor F. H. Hillman 1897-7-12 s.n. Lassen Chat Comment
  HSC68934  Hieracium albiflorum Gary Schoolcraft 1980-7-29 345 Lassen On Big Valley Mtn. Timber sale area W of Bieber 1768 Comment
  UC92024  Hieracium albiflorum unknown 1892-7-26 Lassen Milford Comment
  OBI75888  Hieracium albiflorum Anthony Baniaga 2011-8-16 500 Lassen Lassen Natl Forest. Just N of intersection 32N10H with F.S. 10. Red Cinder quad T30N R8E sec 18 NW of NW 1905 Comment
  UC485536  Hieracium horridum Franklin P. Nutting 1984-7-30 Lassen Silver Lake Silver Lake Comment
  SEINET11262512  Hieracium nudicaule Robert L. Johnson, Mikel R. Stevens 2015-7-10 3938 Lassen Southern Cascade Range. North side of Westwood 0.3 rd mi west of jct with Mooney Rd on CA-36. N side of rd.; 0 1564 Comment
  RSA32855  Hieracium scouleri A. A. Heller 1938-7-28 15301 Lassen About 2 miles east of Westwood. 1524 Comment
  CHSC66720  Hieracium scouleri var. nudicaule Vernon H. Oswald; Lowell Ahart 1996-8-1 8129 Lassen Forest Rd. 28N56 (D-Line) ca. 0.6 mi NNW of Dyer Mtn. Lookout, SSW of Westwood. Near the road. 2011 Comment
  JEPS124842 Image available Hippuris vulgaris Laurel Loeblich 1964-7-1 69 Lassen Collected in stagnant water at side of highway 139, 17.9 miles north of Susanville. Comment
  CHSC71232  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald; Lowell Ahart 1998-6-4 9140 Lassen Red Rock Rd. at its junction with Hwy. 395 south of Constantia. 1365 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
  RSA755003  Holosteum umbellatum subsp. umbellatum L. Ahart, John Dittes 2008-6-20 14922 Lassen About 10-100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 air miles northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 air miles northeast of Bieber. 1264 Comment
  CHSC41842  Hordeum brachyantherum subsp. brachyantherum P. V. Caldwell 1972-7-12 273 Lassen 300 meters from Eagle Lake on Papoose Creek. Comment
  UC1024802  Hordeum brachyantherum subsp. brachyantherum Leo Whitney 1935-6-23 3291 Lassen Camp 10 Fruit Grower's Supply Company Lassen National Forest Comment
  CHSC25162  Hordeum jubatum L. E. Ray 1967-6-25 54 Lassen Ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  CHSC5060  Hordeum jubatum D. L. Stites 1967-6-25 54 Lassen Ca. 2 mi. w ELBS Pellican Point. 1524 Comment
  UC12398  Horkelia fusca subsp. parviflora M. S. Baker and Frank Nutting 1894-7-28 Lassen mtns to s Eagle Lake Comment
  JEPS44575  Horkelia fusca subsp. tenella C. S. Robinson 1930-7-20 37 Lassen near Westwood Jct.; Norval Flat, Lassen Forest 1747 Comment
  CAS-BOT-BC143985  Horkelia fusca var. tenella Clarence R. Quick 1962-6-17 62 -19 Lassen N. of DeLasmutt Ranch on Hwy. 44 along dirt road to Blacks Mountain E. F. Hdqrts. 1615 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
  NY170061  Hutchinsia procumbens N. H. Holmgren 1978-6-11 8907 Lassen Vicinity of spring at fork to Painters Flat on E side of Observation Peak, 28 km (17.4 mi) east of Ravendale and 22.5 km (14 mi) airline distance. 1680 Comment
  CHSC7684  Hydrophyllum capitatum var. alpinum Beverley J. Wise 1969-5-9 47 Lassen 11.0 mi. west of Susanville on Forest Service road 8246, off Hwy. 36. 1524 Comment
  UC1069096  Hydrophyllum capitatum var. alpinum A. Simontacchi 1940-5-10 692 Lassen 4.5 mi sse Black Mtn., B.M. 7310; Lassen National Forest, Halls Flat Quad. 1752 Comment
  UC614681  Hydrophyllum capitatum var. alpinum L. Constance 1938-6-10 2325 Lassen 0.5 mi w Fredonyer Pass 1676 Comment
  RSA88526  Hypericum androsaemum P. H. Raven 1951-7-27 3627 Lassen Lake Ediya Comment
  CHSC66726  Hypericum formosum var. scouleri Vernon H. Oswald; Lowell Ahart 1996-8-1 8127 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi N of Dyer Mtn. Lookout, SSW of Westwood. Common on a wet, open meadowy slope in mixed coniferous forest on the downhill side of the road. 1737 Comment
  UC117500  Idahoa scapigera T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CAS-BOT-BC88640  Idahoa scapigera G. Schoolcraft 1995-4-19 2465 Lassen Southwest of Susanville at west side of Susan Hills. 1341 Comment
  CDA24887  Idahoa scapigera T. C. Fuller 1963-6-1 10640 a Lassen 0.25 mile north of Willow Springs Campground, 3.1 miles southeast of Pittville-Susanville Road, 12.4 miles (road) south of Pittville. 0 Comment
  HSC69298  Idahoa scapigera Gary Schoolcraft 1980-4-8 203 Lassen E side of Schaffer Mtn., 0.25 mi. W of Hwy. 395 1463 Comment
  NY52523  Iliamna bakeri G. Schoolcraft 1983-8-3 1129 Lassen 5 miles w of Madeline 1767.8 Comment
  NY52524  Iliamna bakeri G. Schoolcraft 1983-8-22 1142 Lassen Along Ash Valley Rd. west of Madeline 1737.4 Comment
  UCD126378  Iliamna bakeri Richard R. Halse 2004-7-8 6615 Lassen Along State Highway 139, around 6 miles north of Eagle Lake. 1710 Comment
  CDA35742  Iliamna bakeri D. R. Hill & L. Wheeler 1968-7-15 Lassen Pat Morris Rd & Highway 139 to Adin, 30 miles north of Susanville. 0 Comment
  UC1123846  Ipomopsis aggregata A. Simontacchi 1940-7-1 884 Lassen 4.6 mi ssw Schoonamaker Lake; Lassen National Forest, Halls Flat Quadrangle 1889 Comment
  UC908152  Ipomopsis aggregata Loyd Swift 1928-6-12 Lassen Hall's Flat Lassen National Forest Comment
  CHSC1230  Ipomopsis aggregata subsp. formosissima K. Chew 1954-7-7 Lassen NW end of Eagle Lake. 1615 Comment
  CHSC63410  Ipomopsis congesta subsp. congesta V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6354 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  CHSC75515  Ipomopsis congesta subsp. congesta Vernon H. Oswald; Lowell Ahart 1999-6-9 9745 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  CHSC68895  Ipomopsis congesta subsp. montana Vernon Oswald; Lowell Ahart 1997-6-24 8637 Lassen South of Susanville near the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 Comment
  CHSC107328  Iris hartwegii subsp. hartwegii Lowell Ahart; John Dittes 2011-6-21 17524 -A Lassen 335 feet northwest of Big Valley Canal, 2.1 miles (air) south of County Road 87, 6.6 miles (air) northeast of Bieber, 7.9 miles (air) west by southwest of Adin, Big Valley. 1264 Comment
  CHSC59160  Isoetes bolanderi Vernon H. Oswald; Lowell Ahart 1992-9-15 5215 Lassen Island Lake located N of Bonte Pk. And ca. 1.5 mi W of Juniper Lake campgrounds. Lassen Volcanic National Park. 2164 Comment
  RSA0025411  Isoetes nuttallii Forrest Freund 2013-5-23 193 Lassen HWY 44. Roadside depression. Along the outer edge of water pool in open patches. 1744 Comment
  CHSC30626  Iva axillaris T. M. Lane 1975-7-7 41 Lassen Along Hwy 395, 5 km nnw of Termo; 56 km s of Alturas. 1815 Comment
  CHSC7635  Iva axillaris Beverley J. Wise 1969-5-23 23 Lassen 34.5 mi. E of Susanville on La. Co. Rd. 320. 1249 Comment
  JEPS30423  Iva axillaris subsp. robustior Peter H. Raven with Otto T. Solbrig 1958-6-17 13265 Lassen 11.8 mi ne Litchfield (along United States Highway 395) Comment
  CHSC63416  Ivesia paniculata V. H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 1994-6-26 6352 Lassen Ash Valley Research Natural Area along a 'road' leading south from the right-angle turn on Lassen 527 at the gravel pit, between Adin and Madeline. 1554 Comment
  HSC77272  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin, 16.25 mi. W of Madeline Comment
  UC1133735  Juncus balticus A. Simontacchi 1940-5-17 738 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  JEPS121285  Juncus bufonius var. bufonius Lowell Ahart, John Dittes 2013-7-23 18907 Lassen On the SW side of a man-made pond, about 160 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC117204  Juncus bufonius var. occidentalis Lowell Ahart; John Dittes 2016-6-7 20988 Lassen West edge of pond, 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  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
  JEPS96127  Juncus bufonius var. occidentalis Vernon H. Oswald and Lowell Ahart 1996-6-24 7838 Lassen ca 0.5 mi s Eagle Lake Rd. (A1) (and 2.5 mi s of Eagle Lake, w side of meadow just s of cabins); Modoc Plateau, Papoose Meadows 1633 Comment
  UC1601859  Juncus ensifolius Baker and Nutting 1894-7-24 Lassen Eagle Lake Comment
  HSC29691  Juncus hemiendytus var. abjectus D. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19271 Lassen Harvey Valley near Cone Springs Comment
  CHSC117203  Juncus hemiendytus var. hemiendytus Lowell Ahart; John Dittes 2016-6-7 20991 Lassen West edge of pond, 120 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS118350  Juncus hemiendytus var. hemiendytus Lowell Ahart, John Dittes 2011-6-20 17480 Lassen About 15 yards west of the stream, about 40 yards north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1520 Comment
  CAS-BOT-BC245809  Juncus hemiendytus var. hemiendytus Alice Eastwood; John Thomas Howell 1940-6-11 s.n. Lassen SW of Nubieber, Big Valley Mts. Comment
  RSA201267  Juncus howellii J. T. Howell 1959-9-23 34880 Lassen Lassen County: N end of Juniper Lake. 2058 Comment
  RSA201304  Juncus howellii J. T. Howell 1959-9-23 34880 Lassen Lassen County: N end of Juniper Lake. 2058 Comment
  UC1100948  Juncus mexicanus Malcolm A. Nobs and S. Galen Smith 1947-8-1 8230 Lassen irrigation ditch running sw into State Fish & Game nesting area on w end of Section 19 Madeline Plain Comment
  CHSC117179  Juncus uncialis Lowell Ahart; John Dittes 2016-6-7 21013 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  UCR148432  Juniperus occidentalis David A. Charlet 1994-7-6 1923 Lassen Great Basin, Susanville, corner of Main and Fair Streets 1271 Comment
  UCR164508  Juniperus occidentalis Maile Neel 2000-4-29 G- 2 Lassen Northern Sierra Nevada Mountains, Lassen National Forest, six miles west of Susanville on Hwy 36, at intersection with Eagle Lake Road (A1) near Eagle Lake Ranger Station, 1400 Comment
  SEINET10932817  Juniperus occidentalis subsp. australis Mary Susan Taylor 1982-5-29 Taylor 4570 Lassen T22N R17E e/sw sec 23. Loyalton quad. In Sagebrush Scrub along dirt rd paral- leling Hwy 395 on its e side, ca. 0.5 mi n of 395 jct with Scott Rd, ca. 20 mi n of Reno. 5000 ft. 1524 Comment
  NY20362  Juniperus osteosperma N. H. Holmgren 1970-7-28 4625 Lassen This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UCR3786  Juniperus osteosperma Frank C. Vasek 1964-9-12 640912- 04 Lassen 5.2-5.4 mi north of the junction of US Hwy 395 w/ Calif. Hwy 70 (alt. US Hwy 40) 1479 Comment
  CHSC29939  Kelloggia galioides Robin L. Ondricek 1978-6-14 55 Lassen 1.8 mi E of Coleman Rd. on Lassen Co. Rd. 1950 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
  JEPS97366  Kelloggia galioides Vernon H. Oswald and L. Ahart 1995-7-24 7133 Lassen T31N R7E ca. center of N side of Sec. 23, 6400 ft, High Cascade Range, Red Fir Forest. N of Lake Almanor on Forest Route 10, ca. 3 mi N of Silver Lake and 1 mi W of Upper Stephens Mdws., just S of Pine Creek. 1950 Comment
  UC1374967  Kelloggia galioides Noel H. Holmgren, John J. Fay, and Barton L. Bethers 1970-6-24 4374 Lassen 2 mi w Westwood (at edge of airstrip) 1554 Comment
  SEINET12319533  Kelloggia galioides N. E. Heiken 1978-1 78 Lassen E shore of Mahogany L, S of Eagle L 2060 Comment
  CHSC91190  Koeleria macrantha Lowell Ahart; John Dittes 2005-6-1 11860 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  UC1136815  Koeleria macrantha George A. Fischer and Irwin H. Johnson 1933-8-3 F 278 Lassen Lassen Forest, <Lassen National Forest> 1737 Comment
  CHSC71864  Lactuca saligna Vernon H. Oswald; Lowell Ahart 1998-9-8 9574 Lassen Hwy. 299 at the RR overpass on the east side of Nubieber. 1255 Comment
  UCR67465  Lactuca saligna George K. Helmkamp 1990-9-23 G- 13 Lassen north of Ravendale 1677 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
  JEPS36716  Lactuca tatarica subsp. pulchella W. L. Jepson 1918-8-2 7781 Lassen lower bench of Long Valley Creek; Beckwith Pass, Long Valley Creek 1463 Comment
  JEPS127275  Lagophylla ramosissima Lowell Ahart, John Dittes 2016-7-13 21109 Lassen 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  RSA0009792  Lagophylla ramosissima Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  CAS-BOT-BC352940  Lasthenia glaberrima Wm. Anderson 1960-6-6 s.n. Lassen Barrow pit along county road S. of Mapes Ranch, Henry Lake Valley Comment
  CHSC7669  Lathyrus brownii Beverley J. Wise 1969-5-9 58 Lassen 10.5 mi West of Susanville on Forest service rd. no. 8246 off Hwy 36. 1615 Comment
  UC1137764  Lathyrus brownii August L. Hormay 1934-5-9 Lassen Black Mt. Headquarters Lassen National Forest 1706 Comment
  UC727153  Lathyrus brownii A. A. Heller 1938-6-4 15147 Lassen 1 mi e Fredonyer Pass (e of Westwood) 1706 Comment
  POM253248  Lathyrus pauciflorus subsp. brownii A. A. Heller 1938-6-4 15147 Lassen 1 mile east of Fredonyer Pass. 1707 Comment
  POM277812  Lathyrus sulphureus Lyman Benson 1932-5-14 3584 Lassen Coarsegold 549 Comment
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Jul 2 2013
  RSA170169  Lemna minor W. L. Jepson 1918-8-16 8000 Lassen Merrillville 1524 Comment
  HSC95178  Lemna minuta Gordon Leppig 1998-7-12 935 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  UC1101266  Lemna trisulca Malcolm A. Nobs, S. Galen Smith 1949-7-22 1076 Lassen 10 mi n of Susanville (along Willow Creek, Willow Creek Valley); Willow Creek Valley, Willow Creek Comment
  JEPS114944  Lepidium chalepense Lowell Ahart, John Dittes 2008-6-20 14978 -B Lassen Where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CAS-BOT-BC88939  Lepidium dictyotum Arnold Tiehm 1980-5-29 5747 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air mile north-northwest of Wendel. 1231 Comment
  UC10677  Lepidium dictyotum var. acutidens M. S. Baker and Frank Nutting 1894-7-5 Lassen Dixie Valley Comment
  CHSC64774  Lepidium dictyotum var. dictyotum Vernon H. Oswald 1995-5-24 6773 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 0.4 mi e of the e end of Amedee Rd. (6.1 mi e of Wendel). On a flat bordering the road. 1219 Comment
  CAS-BOT-BC89722  Lepidium latifolium Gary Schoolcraft 1984-7-31 1330 Lassen Along Highway 395 about 1 mile north of Ravendale Fire Station. 1615 Comment
  NY76543  Lepidium latifolium J. T. Howell 1975-7-23 51384 Lassen Eagle Lake Lumber Company yard, Susanville 1295.4 Comment
  CDA43003  Lepidium perfoliatum L. Ahart, John Dittes 2008-6-2 14934 Lassen On the levee road, about 100 yards south of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
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Oct 5 2019
  CHSC5238  Lepidium perfoliatum L. Martin 1953-6-30 Lassen Eagle Lake. E side of Honey Lake near Doyle. 1299 Comment
  UCD115849  Lepidium perfoliatum R. Tofsrud 1951-7-13 s.n. Lassen Susanville area. Comment
  UCD115855  Lepidium perfoliatum Grady L. Webster 1989-5-13 7713 Lassen 2.5 mi E of Beckworth Pass. 1493 Comment
  NY90026  Lepidium perfoliatum D. B. Dunn 1971-6-2 17749 Lassen 3 miles south of Hallelujah Junction, on US Highway 395, Junction of US 395 and California 70 Comment
  JEPS53770  Lepidium virginicum var. virginicum W. L. Jepson 1918-8-2 7763 Lassen Beckwith Pass 1463 Comment
  UC1137585  Leptodactylon pungens A. Simontacchi 1940-6-30 911 Lassen 4.2 mi s Blacks Mtn.; Lassen National Forest, Halls Flat Quad. Comment
  UC526131  Leptodactylon pungens John Thomas Howell 1934-7-9 12524 Lassen Pine Creek Flat Comment
  CHSC61229  Leptosiphon ciliatus P. V. Caldwell 1972-6-29 260 Lassen Eagle Lake. Stream that runs into Upper Deans Meadow, on bank. Comment
  RSA713121  Leptosiphon ciliatus L. P. Janeway, B. Castro 2005-7-10 8480 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of Rd. 28N01 and 0.6 km east of junction of Janesville Grade Rd (Rd 208 & 28N02) and Road 28N01. 1859 Comment
  SEINET7967451 Image available Leptosiphon ciliatus John Thomas Howell 1974-7-10 50560 Lassen Elysian Valley 1326 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
  CHSC4794  Leptosiphon harknessii R. Carter 1967-6-29 571 Lassen Roadside, n side of rd. On rd to Murrer's Medow. Eagle Lake. 1584 Comment
  RSA0092312  Leptosiphon harknessii Jim M. Andre, Tasha La Doux, Senna Andre, Elias Andre 2013-7-12 31424 Lassen Along north side of Hwy 44 at south end of Grays Valley, along NF Rd# 33N02, north of Bogard Buttes, about 30 mi. west of Susanville. 1732 Comment
  POM364710  Leptosiphon harknessii J. T. Howell 1934-6-10 11844 Lassen Near Plumas Junction Comment
  CAS-BOT-BC334598  Leucanthemum vulgare G. Schoolcraft 1987-6-17 1746 Lassen Along Hwy 36 about 3 miles east of Westwood 1554 Comment
  UC70406  Leucocrinum montanum Milo S. Baker 1891-1 Lassen near Adin; Big Valley Comment
  CAS-BOT-BC508368  Leucocrinum montanum M. Lavin; K. Lavin 1982-5-16 4067 Lassen 1.5 miles east of Halleluja Jct., US 395, Sierra Nevada 1676 Comment
  SEINET12044967  Leucocrinum montanum R. M. Austin 1879-1 s.n. Lassen Pine Creek Comment
  SEINET12319573  Leucophysalis nana J. D. Prouty 1978-1 9 Lassen E of Eagle Lake, at Lower Dry Lake, above W shore 1646 Comment
  SEINET6170686  Leucophysalis nana G. Schoolcraft 1999-6-29 2849 Lassen E edge of Madeline Plains ca 9 mi NE of Ravendale 1615 Comment
  HSC75895  Lewisia nevadensis D. H. Norris, S. Dowty, Thomas W. Nelson 1971-6-22 19194 Lassen Harvey Valley near Cone Springs Comment
  CHSC60763  Lewisia triphylla Vernon H. Oswald; Lowell Ahart 1993-6-3 5473 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. On the margins of a meadow. 1731 Comment
  JEPS28403  Lewisia triphylla George W. Gillett 1957-7-21 863 Lassen 300 yds n Juniper Lake - Cameron meadow trail summit; Lassen Volcanic National Park 2118 Comment
  RSA299613  Leymus cinereus J. T. Howell 1974-7-9 50495 Lassen Susanville; Sierra Nevada 1296 Comment
  UC1037143  Leymus cinereus Leo Whitney 3335 Lassen Camp 10 <of> Fruit Grower's Supply Company Lassen National Forest Comment
  UCD64225  Leymus cinereus Beecher Crampton 1954-7-6 2070 Lassen Along US Hwy 395, 2 mi. east of Johnstonville. Comment
  RSA129541  Leymus condensatus C. W. Hanks 1934-8-18 57 Lassen Sierraville; N. W. part of Upper Long Valley 1616 Comment
  CAS-BOT-BC274467  Leymus triticoides John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49522 Lassen Elysian Valley, west of Janesville 1325 Comment
  CDA18262  Leymus triticoides G. D. Barbe 1974-8-2 1924 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  JEPS28660  Ligusticum grayi George W. Gillett 1957-7-21 870 Lassen Lassen Volcanic Nat'l Park, Cameron Meadow 1950 Comment
  UC1100164  Lilaea scilloides Malcolm A. Nobs and S. Galen Smith 1949-7-20 1048 Lassen Bieber; along Highway 299 Comment
  CAS-BOT-BC130513  Lilium John Thomas Howell 1976-7-19 51979 Lassen On Gold Run Creek southwest of Susanville 1386 Comment
  CAS-BOT-BC246147  Limosella aquatica R. F. Thorne; C. W. Tilforth 1969-9-5 39137 Lassen Said Valley Reservoir Comment
  CHSC113012  Limosella aquatica Lowell Ahart; John Dittes 2013-7-23 18889 Lassen Around a man made pond, about 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS3468  Limosella aquatica J. Burtt Davy Jun 17 1897-Jun 24 1897 3354 Lassen Honey Lake Valley; Adobe meadows Comment
  POM312522  Limosella aquatica Malcolm A. Nobs, S. Galen Smith 1949-7-20 1046 Lassen Bieber, along Highway 299. Comment
  UC1184062  Linanthus ciliatus Jean Langenheim 1957-6-26 4400 Lassen nw Said Valley, from areas adjacent ot 1937 chaparral quadrat, e part of Lassen County Said Valley Comment
  SEINET11268150  Linanthus harknessii Vernon H. Oswald, Lowell Ahart 1993-6-14 5516 Lassen Eagle Lake Rd. (Lassen a1), 0.5 mi SW of Spaulding Tract Rd. (Rd. 518, 33N89), ca. 3 mi W of Eagle Lake.; 0 1811 Comment
  CHSC60841  Linanthus pungens Vernon H. Oswald; Lowell Ahart 1993-6-28 5594 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake. 1731 Comment
  OBI75885  Linanthus pungens subsp. pulchriflorus Anthony Baniaga 2011-7-1 415 Lassen BLM. Fort Sage MTs OHV trailhead area, E of Doyle. Quad 1442 Comment
  CHSC80221  Linum lewisii var. lewisii Jeanne Boze 1981-6-12 110 Lassen Along road to 5 corners, 3.1 from Eagle Lake Field Station. 1737 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
  CHSC61177  Lithophragma glabrum Vernon Oswald; Lowell Ahart 1993-5-12 5385 Lassen Hwy. 44 between Old Station and A21 (to Westwood), at a cattle guard 1.6 mi NW of Rd. 32N08 to Crater Lake. 1751 Comment
  UC773886  Lithophragma glabrum L. R. Short 1936-4-28 S- 336 Lassen Burgess Spring Experiment Range , Burgess Spring Experiment Range (Lassen National Forest) 1767 Comment
  CAS-BOT-BC428416  Lithophragma tenellum Doris Kildale Gillespie 1930-5-13 9369 Lassen Between Susanville and Janesville Comment
  UC496334  Lithophragma tenellum Doris Kildale Gillespie 1930-5-13 9369 Lassen between Susanville and Janesville Comment
  POM92082  Lithophragma tenellum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CDA42915  Lithospermum arvense L. Ahart, John Dittes 2012-7-11 18351 Lassen North edge of a farmed field, on the south side of the highway, about 100 yards east of Cable Road and Pittville Road, 2.16 miles (air) north-northeast of Pittville, 3955 feet east of Lassen-Shasta County Line, Fall River Valley. Comment
  UC131185  Loeflingia squarrosa var. artemisiarum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  CHSC42595  Lomatium bicolor var. leptocarpum Vernon Oswald 1986-5-28 2048 Lassen Hwy 36, 11.3 mi e of the Plumas-Lassen Co. line, 0.5 mi sw of Fredonyer Pass. 1691 Comment
  CHSC66229  Lomatium bicolor var. leptocarpum Vernon H. Oswald 1996-6-24 7855 Lassen Papoose Meadows located ca.0.5 mi E of Eagel Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  RSA0049671  Lomatium bicolor var. leptocarpum Dean Wm. Taylor 2012-5-15 21195 Lassen Windmill Flat vicinity; one mile north of the north end (watershed East Fork Juniper Creek, tributary to Pit River at Big Valley) 1676 Comment
  CHSC57338  Lomatium macrocarpum B. G. Clark 1987-4-15 21 Lassen Slope 60 ft north side of Paul Bunyan Rd. 0.5 mi east of jct with Paiute Lane, Susanville. 1280 Comment
  CHSC67146  Lomatium macrocarpum James D. Jokerst 1991-5-29 3308 Lassen Modoc Plateau. Survey for reroute of Hwy. 139 at the end of Eagle Lake, top of plateau E of N basin, W of N-S oriented dirt road. 1737 Comment
  UC1520662  Lomatium nevadense var. nevadense Noel H. Holmgren and Patricia K. Holmgren 1980-7-4 9513 Lassen 18 km. (11 mi.) airline distance e. Ravendale (s. side Observation Peak); Observation Peak Comment
  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
  CHSC72293  Lomatium plummerae L. P. Janeway; Glenn Clifton 1998-7-8 5721 Lassen Ridgetop saddle about 2.5 mi northwest of Red Rock; at junction of Roads 28N08,19N10, 213, and 28N55. Top of north-facing Wyethia opening in open yellow pine forest. 1988 Comment
  NY406056  Lomatium ravenii L. Constance 1959-6-14 3672 Lassen One mile south of Ravendale 1463.0 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
  UC1479584 Image available Lomatium ravenii Gary Schoolcraft 1980-5-6 218 A Lassen Honey Lake Island 1219 Comment
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Oct 26 2017
  UC1483812 Image available Lomatium ravenii T. Prendusi, M. Meyer 1980-5-1 Lassen S of Ravendale 1615 Comment
  UCR183195  Lomatium ravenii Jim Andre, G. L. Clifton 1993-6-2 7716 Lassen Along Hwy 395 c. 25 mi NE of Susanville at Viewland exit, east of Shaffer Mtn 1349 Comment
  OBI81733  Lomatium ravenii Tracey Call, Viola Call 1961-5-30 2048 Lassen about 2 miles south of Ravendale Comment
  UC1924598  Lomatium triternatum Debra Valov 2006-5-28 2006008 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1305 Comment
  CHSC42630  Lomatium triternatum var. macrocarpum Vernon Oswald 1986-5-28 2059 Lassen Hwy 139 between Eagle Lake and Adin, 38.1 mi n of Susanville. 1645 Comment
  SEINET222482  Lomatium triternatum var. macrocarpum Noel H. Holmgren, Patricia K. Holmgren 1978-6-11 8930 Lassen Upper Smoke Creek south side of Observation Peak 7.6 km northeast of Tye Patch Canyon summit 18.5 km airline distance 1700 Comment
  SEINET11131322  Lomatium triternatum var. triternatum M. J. Williams, G. Schoolcraft, A. Tiehm 1986-5-12 86201 Lassen Smoke Creek Rd., E of HWY 395 1433 Comment
  JEPS127567  Lomatium vaginatum L. P. Janeway, B. Castro 2015-6-5 11773 Lassen Great Basin, Modoc Plateau. Along Tuledad Road (County Road 506) 4.7 road-km south of the junction at the west end of Tuledad Canyon; 2.6 air-km east-northeast of Dodge Reservoir. Buckhorn Lake 7.5' Quad, Comment
  RSA584834  Lomatium vaginatum Bruce Bartholomew, M. Gilbert, L. Skog 1993-5-13 6555 Lassen Just S. of Ravendale., 40 deg. 47' 43'' N, 120 deg. 21' 40'' W. 1580 Comment
  UC21281  Lomatium vaginatum Mrs. C. C. Bruce June 1898 2286 Lassen <Madaline> Plains Comment
  UCD55282  Lomatium vaginatum Ellen Dean; Gary Schoolcraft 2006-5-16 3101 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1207 Comment
  OBI48162  Lomatium vaginatum Rhonda Riggins 1989-4-27 1633 Lassen Wash through volcanic boulder pavement, US 395, 8.4 mi N Litchfield, 26.6 mi S Ravendale 1311 Comment
  CDA27193  Lotus crassifolius L. E. Allen 1967-6-4 Lassen Pinecrest Ranch, 0.5 mile south of Susanville. 0 Comment
  UC726744  Lotus denticulatus A. A. Heller 1941-6-24 16191 Lassen 1 mi e Sieber (along US Hwy 299) Comment
  RSA339993  Lotus humistratus Noel Holmgren, Patricia K. Holmgren, A. H. Holmgren 1980-7-3 9481 Lassen Madeline Plains, Westside Road, 9 km (5.6 mi) west of U.S. Highway 395, 16 km (10 mi) airline distance northwest of Termo. 1620 Comment
  CHSC24959  Lotus purshianus K. R. Stern 1974-6-26 5858 Lassen Ditch bank beside railroad track, e side of Poison Lake Rd. to Pittville, ca. 1.8 mi nw of intersection with Hwy. 44. 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
  HSC23526  Lotus salsuginosus R. Carter 1967-6-27 554 Lassen 10 yds. off N side of rd., 1.75 mi. W of Eagle Lake Biology Station 1585 Comment
  JEPS128088  Ludwigia palustris Lowell Ahart, John Dittes 2013-7-23 18904 Lassen About 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  RSA624904  Lupinus Jeffrey Huber 1971-6-2 110 Lassen 4 mi. S of Adin along Calif. Hwy. 139. Comment
  CHSC23548  Lupinus arbustus Wayne O. Baum 1971-7-6 71 -45 Lassen E. slope of Gallatin Peak. 1950 Comment
  CHSC30623  Lupinus arbustus John Steiner 1975-7-10 21 Lassen Road 5a, .4 mi N. Mahogany Lake. 2072 Comment
  CHSC5286  Lupinus arbustus 1944-7-19 Lassen Juniper Lake. 2055 Comment
  CHSC91669  Lupinus arbustus L. P. Janeway 2005-7-4 8475 Lassen High Cascade Range. 33 m east of Road A21 at the Road 104 junction; south of Clover Valley and east of Barnes Flat; 5.6 air km north-northeast of Swain Mountain. 1775 Comment
  UC126947  Lupinus arbustus Mrs. R. M. Austin and Bruce June 1898 2144 Lassen Madaline Plains Madaline Plains <Madeline Plains?>; High Mts. Madaline Plains <Madeline Plains?> Comment
  SEINET5327708  Lupinus arbustus J. Young 1978-4-13 s.n. Lassen Meyers Ranch, Adin, CA Comment
  SEINET10490461  Lupinus arbustus subsp. arbustus Paul Gallian, Billy Joe Cox 1971-6-2 Gallian 478 Lassen Ca 3 miles s of janesville at honey lake, rest area on us hwy 395; in Sagebrush-grass margin between jeffery pine-oak forest and honey lake 1250 Comment
  NY732867  Lupinus arbustus subsp. calcaratus K. Morris 1973-5-25 211 Lassen Collected 9.6 miles north of Milford on US 395 Comment
  CHSC106689  Lupinus argenteus B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  CAS-BOT-BC208728  Lupinus argenteus var. heteranthus F. Payne 1929-7-12 74 Lassen Lost Lake, Warner Mts. 2286 Comment
  CAS-BOT-BC208743  Lupinus argenteus var. heteranthus Roxana S. Ferris; Rena Duthie 1919-6-13 18 Lassen Madaline Comment
  CAS-BOT-BC208757  Lupinus argenteus var. heteranthus Doris Kildale Gillespie 1930-5-13 9372 Lassen Between Susanville and Janesville. Comment
  CAS-BOT-BC208761  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-6-13 47443 Lassen Highway 299, Nubieber, 6.6 miles west. Comment
  CHSC60740  Lupinus argenteus var. heteranthus Vernon H. Oswald; Lowell Ahart 1993-6-14 5514 Lassen Eagle Lake Rd. (Lassen A1), 0.5 mi SW of Spaulding Tract Rd. (Rd. 518, 33N89), ca. 3 mi W of Eagle Lake. 1810 Comment
  JEPS107302  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2005-6-1 11873 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, 3.8 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS114624  Lupinus argenteus var. heteranthus Lowell Ahart, John Dittes 2008-6-19 14873 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  NY736922  Lupinus argenteus var. heteranthus N. H. Holmgren 1978-6-11 8925 Lassen Painters Flat road, 31.2 km (19.4 mi) east of Ravendale and 25 km (15.5 mi) airline distance 1800 Comment
  UC127527  Lupinus argenteus var. heteranthus J. Burtt Davy Jun 17-24, 1897 Lassen Honey Lake Valley Comment
  UC865100  Lupinus argenteus var. heteranthus W. A. Archer 1938-6-16 6020 Lassen 5 mi w Doyle; w of Doyle Comment
  UCD106819  Lupinus argenteus var. heteranthus Grady L. Webster 1989-5-13 7712 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  SEINET5327809  Lupinus argenteus var. heteranthus G. Schoolcraft 1997-5-14 2589 Lassen W slope of Ft. Sage Mtns. 3 mi N of Doyle 1311 Comment
  POM23858  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  RSA59517  Lupinus caudatus E. K. Balls 1950-5-21 14824 Lassen Standish, 7 miles from junction of Highway 36 and 395. 1250 Comment
  SEINET10490607  Lupinus caudatus subsp. caudatus Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 863 Lassen Collected on road bank 24 mi n of calif. State line on hwy 395. Comment
  SEINET10490671  Lupinus caudatus subsp. caudatus Paul Gallian, David B. Dunn 1971-6-2 Gallian 458 Lassen 6 mi. N of hallelujah jact on us hwy 395, in aremisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  SEINET10490715  Lupinus caudatus subsp. caudatus Mary Susan Taylor 1982-6-12 Taylor 4653 Lassen T25n, r17e, se1/4, sec 8. Doyle quad. Corolla blue. In sandy sagebrush Scrub, in doyle, ca 0.5 mi. E of hwy 395. Comment
  SEINET10936574  Lupinus caudatus subsp. caudatus Katherine L. Morris 1973-5-25 Morris 213 Lassen Collected in an area of artemisia tridentata, 4 mi se of susanville, on us 36. Comment
  SEINET530758  Lupinus caudatus var. caudatus Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 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
  RSA0029190  Lupinus confertus John F. Emmel 1997-6-8 1490 Lassen At Hwy. 395 crossing of Secret Creek, on hill and slope 0.2-0.3 air mi WSW of the crossing, 2.7 road mi north of Karlo Road junction. 1448 Comment
  RSA0060732  Lupinus grayi Daisie Huang 2006-8-3 06080307 Lassen Slope under yellow pine forest. 1040 Comment
  SEINET6655529  Lupinus laxiflorus var. calcaratus Noel H. Holmgren, Patricia K. Holmgren 1978-6-11 8932 Lassen 2.4 km (1.5 mi) east of Rye Patch Canyon summit, 16 km (10 mi) airline distance southeast of Ravendale.; 0 1830 Comment
  CHSC4818  Lupinus lepidus var. confertus R. Carter 1967-7-16 618 Lassen Willow Creek Valley, e of Murrer's Ranch, 1.5 mi w of highway 139 on rd to Eagle Lake, ca. 12 mi n of Susanville, on s side of rd. Comment
  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
  UC1129510  Lupinus lepidus var. confertus H. S. Yates 1936-8-11 6071 Lassen Baxter Creek; Susanville Quadrangle, Baxter Creek Comment
  NY747211  Lupinus lepidus var. confertus M. J. Williams 1983-7-31 83- 126 --1 Lassen Roadside near Janesville 1280 Comment
  SEINET8051636  Lupinus lepidus var. confertus G. Schoolcraft 1992-8-11 2246 Lassen Along Highway 395 near inters. of Janesville Road 1280 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
  CHSC65103  Lupinus lepidus var. sellulus Vernon H. Oswald; Lowell Ahart 1995-7-24 7138 Lassen High Cascade Range. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. Locally common in dry soil at the NE corner of the impoundment on Pine Creek. 1905 Comment
  CHSC99124  Lupinus lepidus var. sellulus Lowell Ahart; John Dittes 2008-6-19 14886 Lassen Open flat, 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
  CHSC91606  Lupinus leucophyllus L. P. Janeway 2005-7-4 8473 Lassen High Cascade Range. 0.2 km south of Road 33N02 on low ridge between Burgess Spring and Dixie Spring, along Road 33N02C. 1746 Comment
  UC506994  Lupinus leucophyllus George A. Fischer and Irwin H. Johnson 1933-7-12 204 Lassen Grass Valley. Comment
  SEINET11268214  Lupinus leucophyllus Vernon H. Oswald, Lowell Ahart 1993-6-28 5607 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake.; 0 1725 Comment
  UCD107961  Lupinus leucophyllus G. Schoolcraft 1994-6-9 2347 Lassen 1 1/2 m. NE of Hwy. 139 on Grasshopper-Temo Rd. 1615 Comment
  SEINET194955  Lupinus microcarpus var. densiflorus A. A. Heller 1938-6-23 15219 Lassen Along U.S. Highway 395 between Germo and Madeline. 1524 Comment
  SEINET8059970  Lupinus polyphyllus var. burkei W. W. Eggleston 1910-1 6305 Lassen Vicinity of Doyle Station 1240 Comment
  POM110680  Luzula comosa Marcus E. Jones 1897-7-2 s.n. Lassen Near Prattville at Clear Creek. 1524 Comment
  JEPS88431  Lythrum portula Vernon H. Oswald and Lowell Ahart 1996-8-1 8104 Lassen sw of Westwood (ne of Indian Ole Dam, Mountain Meadows Reservoir); Mountain Meadows Reservoir Comment
  HSC93435  Lythrum portula Vernon H. Oswald, L. Ahart 1996-8-1 8104 Lassen Mtn. Meadows Reservoir SW of Westwood, receding shore NE of Indian Ole Dam 1540 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
  JEPS121287  Lythrum tribracteatum Lowell Ahart, John Dittes 2013-7-23 18902 Lassen About 150 yards NW of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CDA8224  Machaeranthera canescens T. C. Fuller 1964-10-8 12703 Lassen Head of Secret Valley, south of Ravendale. 0 Comment
  UCSB48516  Madia Clare B. Hardham 1961-6-16 7451 Lassen collected at Gold Run Creek S of Susanville 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
  CHSC30624  Madia elegans E. C. Taylor 1975-7-19 73 Lassen Ca. 30 yds nw of ELFS Vesta Holt Hall. 1584 Comment
  JEPS40375  Madia elegans W. L. Jepson 1939-8-11 19373 Lassen Milford 1280 Comment
  CAS-BOT-BC343698  Madia elegans Margaret Williams; Louella Bass 1972-10-22 EV 7 Lassen Elysian Valley, northwest of Janesville 1325 Comment
  UC76023  Madia exigua Milo S. Baker Jul 1905 Lassen Dixie Valley Comment
  CAS-BOT-BC343059  Madia gracilis John Thomas Howell 1974-7-10 50552 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC347439  Malacothrix floccifera Louella Bass 1974-7-1 EV 153 Lassen Elysian Valley 1325 Comment
  JEPS102664  Malacothrix glabrata V. H. Oswald, B. Corbin, K. Earll, and G. Schoolcraft 2001-6-2 10038 Lassen N-NE of Doyle (dirt road bordering the E side of Turtle Mountain) 1828 Comment
  CAS-BOT-BC348031  Malacothrix torreyi Louella Bass 1982-6-20 s.n. Lassen About 1 mile west of Karlo Comment
  JEPS121255  Malva neglecta Lowell Ahart, John Dittes 2013-7-22 18877 Lassen E of drainage, 40 yards S of the man-made pond, about 110 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  HSC23508  Marrubium vulgare A. E. Anderson 1967-7-11 78 Lassen Around Bly Tunnel outlet, 1 mi. E of rd. to Eagle Lake Biological Station 1555 Comment
  UC1192360  Marsilea Verne Grant and Irving Schneider 1947-7-31 8219 Lassen irrigation ditch running sw into State Fish and Game nesting area on w end Section 19 Madeline Plain Comment
  CHSC117546  Marsilea vestita subsp. vestita Lowell Ahart 2016-7-13 21130 B Lassen Along the west edge of the pond, 90 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  JEPS127277  Marsilea vestita subsp. vestita Lowell Ahart, John Dittes 2016-7-13 21130 -B 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
  JEPS114749  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-22 15024 Lassen End of a levee, about 100 yards east of the tall poles, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber 1260 Comment
  RSA647538  Matricaria matricarioides Marion P. Harthill 1972-6-16 783 Lassen Doyle 1372 Comment
  UCD37478  Melica fugax Beecher Crampton 1960-6-18 5726 Lassen Lassen County, southern Warner Mountains, 1.25 miles north of Blue lake, in vicinity of Blue Lake Ranch. 1981 Comment
  CHSC11769  Melica stricta Wayne O. Baum 1971-7-5 71 -3 Lassen E. slope of Gallatin Peak. 2011 Comment
  CHSC30586  Melilotus indicus P. V. Caldwell 1972-6-30 270 Lassen Jct. of Horse Lake Rd. and Hwy. 395. Comment
  JEPS117562  Mentzelia albicaulis Lowell Ahart, John Dittes 2010-7-31 17019 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
  SEINET247590  Mentzelia albicaulis Noel H. Holmgren, Patricia K. Holmgren 1980-7-4 9507 Lassen Observation Peak, south side of the mountain, 18 km (11 mi) air distance east of Ravendale. 1890 Comment
  UC1609094  Mentzelia albicaulis Vernon H. Oswald and Lowell Ahart 1993-7-8 5654 Lassen 1.9 m N Hwy. 44 (on the SE edge of Poison Lake.); Pittville Rd.(Lassen 111,36N01); T32N R7E SE1/4 SE 1/4 Sec. 4 1709 Comment
  UCD117212  Mentzelia albicaulis Grady L. Webster 1989-5-13 7705 Lassen 2.5 miles east of Beckworth Pass. 1493 Comment
  HSC63775  Mentzelia albicaulis Teresa Prendusi 1980-4-28 Lassen Rice Canyon along W slope. 1372 Comment
  JEPS107445  Mentzelia congesta Lowell Ahart, John Dittes 2005-6-1 11887 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  RSA715543  Mentzelia dispersa L. Ahart 2005-6-1 s.n. Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  UC506973  Mentzelia dispersa George A. Fischer, Irwin H. Johnson 1933-7-12 F 229 Lassen Lassen Forrest, Patterson Flat 1737 Comment
  UC725475  Mentzelia dispersa A. A. Heller 1938-6-22 15184 Lassen 1 mi e Westwood (in the yellow pine forest) 1524 Comment
  UCD117218  Mentzelia dispersa Verne Grant; Irving Schneider 1947-8-1 8228 Lassen irrigation ditch running southwest into State Fish and Game nesting area on west end of Section 19, Madeline Plain. Comment
Read comments
Dec 5 2012
  POM260353  Mentzelia dispersa C. L. Hitchcock 1940-5-26 6606 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  SEINET194902  Mentzelia pinetorum A. A. Heller 1938-6-22 15184 Lassen Mile east of Westwood. Transition Life Zone. 1524 Comment
  CHSC27075  Menyanthes trifoliata Robert A. Schlising 1978-8-1 3332 Lassen SE of Eagle Lake in Murrers Upper Meadow. 1645 Comment
  NY1084278  Mertensia oblongifolia M. J. Williams 1986-5-14 86- 39 --1 Lassen 1.5 rd mi W of turn to Dodge Reservoir, on rd from Tuledad Canyon to Ravendale. 1706.9 Comment
  CAS-BOT-BC429081  Micranthes odontoloma Alice Eastwood 1912-8-22 1861 Lassen Trail from Morgans Springs to Lassen Butte Comment
  JEPS87523  Microseris laciniata Vernon H. Oswald and Lowell Ahart 1993-6-28 5588 Lassen Harvey Valley Rd (33N02) 1.7 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1719 Comment
  CHSC99295  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-20 14951 Lassen About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC66235  Microseris nutans Vernon H. Oswald; Lowell Ahart 1996-6-24 7866 .1 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. On the W side of the meadow ca. 0.2 mi S of the cabins. 1633 Comment
  RSA702595  Microseris nutans L. P. Janeway 2004-6-26 8152 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13; 3.5 km north of junction of Road 33N18. 1714 Comment
  UC1070116  Microseris nutans Robert W. Gardner 1937-6-16 G- 14 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  CAS-BOT-BC349302  Microseris nutans G. Schoolcraft 1993-6-29 2317 Lassen Ash Valley, 16 mi E. of Adin 1554 Comment
  RSA122927  Microsteris gracilis subsp. gracilis Anonymous 1936-5-7 S- 343 Lassen Lassen National Forest, MDM, Burgess Spr. Exp. Range 1738 Comment
  RSA505418  Mimulus breviflorus R. C. Bacigalupi, S. Galen Smith 1957-6-28 5989 Lassen Along rivulet just east of U.S. Highway 395, 7.0 miles north of Madeline, about one mile north of Sage Hen siding on Southern Pacific Railroad; 1677 Comment
  UC1037226  Mimulus breweri Leo Whitney 1933-8-14 1596 a Lassen ca. 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  CDA41435  Mimulus floribundus L. Ahart, John Dittes 2005-6-2 11970 Lassen Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. Comment
  CDA41794  Mimulus guttatus T. C. Fuller 1961-5-17 6961 Lassen Hot springs, Wendell. 0 Comment
  JEPS107380  Mimulus mephiticus Lowell Ahart, John Dittes 2005-6-1 11869 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  JEPS11447  Mimulus microphyllus Brown and Wieslander 1922-7-30 39 Lassen Martin Springs Eagle Lake Comment
  UC1523772  Mimulus moniliformis Gary Schoolcraft 1981-6-25 475 Lassen Comment
  POM252823  Mimulus nanus var. mephiticus A. A. Heller 1938-6-22 15188 Lassen About 1 1/8 miles south of Westwood. 1524 Comment
  RSA715546  Mimulus nanus var. mephiticus L. Ahart, John Dittes 2005-6-1 11869 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC1136832  Mimulus primuloides subsp. primuloides George A. Fischer and Irwin H. Johnson 1933-7-14 F 243 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  RSA536397  Mimulus pygmaeus Beth Corbin, Steve Klukkert 1991-6-11 623 Lassen Harvey Valley, just NNE of Harvey Station. 1690 Comment
  UC1609129  Mimulus suksdorfii Vernon H. Oswald and Lowell Ahart 1993-6-3 5486 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y) junction with Lassen 21 (32N02) to Eagle Lake (on w edge of valley, between Poison Lake and Susanville); Pine Creek Valley 1731 Comment
  HSC22951  Monardella odoratissima John Pratt 1970-6-21 30 Lassen 1738 Comment
  SEINET10498937  Monardella odoratissima Mary Susan Taylor 1974-1 Taylor 275 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC221973  Monardella odoratissima subsp. glauca Alice Eastwood; John Thomas Howell 1940-6-15 8328 Lassen Round Valley Comment
  CHSC5272  Monardella odoratissima subsp. glauca J. B. Kimsey 1946-6-11 Lassen Pine Creek, near Eagle Lake. 1580 Comment
  LA54200  Monardella odoratissima subsp. glauca John Thomas Howell; 1934-6-10 11888 Lassen 12 mi. N of Susanville on rd to Horse Lake Comment
  UC25488  Monardella odoratissima subsp. pallida M. S. Baker and Frank Nutting 1894-7-28 Lassen mts. s Eagle Lake Comment
  HSC81781  Monolepis nuttalliana Thomas W. Nelson, Jane Nelson 1980-7-6 6013 Lassen Along Adin-Madeline Rd., 15 mi. E of Adin in Ash Valley just beyond bridge at baths 1555 Comment
  UC851254  Monolepis nuttalliana Milo S. Baker 1936-6-16 8365 Lassen ca. 30 mi. n. Susanville Comment
  CAS-BOT-BC444695  Montia chamissoi Louella Bass 1973-6-17 123 Lassen Elysian Valley. 1325 Comment
  CHSC60764  Montia chamissoi Vernon H. Oswald; Lowell Ahart 1993-6-14 5509 Lassen Lassen A21 (32N02), 5.3 mi E of Lassen 105 (32N28Y), near Summit Camp, ca. 7 mi (air) W of Eagle Lake. Common in shallow water and on wet soil along a streamlet draining into a pond located in a small meadow surrounded by open pine woodland with an understory of sagebrush. 1889 Comment
  CHSC68757  Montia chamissoi Vernon H. Oswald; Lowell Ahart 1997-5-27 8498 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi east of Hwy. 139. In wet gravel on the flood plain of a small creek paralleling the road. 1546 Comment
  NY497728  Montia chamissoi G. Schoolcraft 1993-6-1 2272 Lassen Upper Secret Creek, south of Tule Patch Spring 1463.0 Comment
  CHSC77226  Montia fontana G. Schoolcraft 1995-5-16 2478 Lassen 2 mi. east of Bull Flat. Growing in spring. 1615 Comment
  OBI77069  Montia linearis Anthony Baniaga 2011-6-7 314 Lassen Lassen NF. NW area of Grays Valley, just S of intersection of 33N11 and 32N83Y. Poison Lake quad T32N R7E sec 11 SW of NE 1747 Comment
  UCD86509  Muhlenbergia andina Leo Whitney 1934-7-24 2195 Lassen Bridge Creek camp near Bridge Creek. 7-8 miles southwest of Eagle Lake, Lassen National Forest. 1737 Comment
  CAS-BOT-BC262634  Muhlenbergia asperifolia John Thomas Howell; G. H. True 1973-8-1 50147 Lassen In Mountain Meadows east of Westwood 1554 Comment
  UC36660  Muhlenbergia asperifolia J. Burtt Davy Jun 17 1897-Jun 24 1897 3367 Lassen Adobe Meadows Honey Lake Valley Comment
  UC1024685  Muhlenbergia filiformis Leo Whitney 1933-8-3 2160 Lassen ca 10 mi nw north end of Eagle Lake; Lassen National Forest, Sheepshead 1889 Comment
  UCD86724  Muhlenbergia filiformis L. Whitney 1935-6-21 3250 Lassen Camp 10, Fruit Grower's Supply Company, Lassen National Forest. Comment
  RSA256323  Muhlenbergia jonesii J. R. Reeder, C. G. Reeder 1973-6-5 6238 Lassen Vicinity of Silver Lake, 22 miles NW of Susanville along Hwy 44 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
  UC163551  Muhlenbergia jonesii Milo S. Baker Lassen Eagle Lake Comment
  CAS-BOT-BC275156  Muhlenbergia richardsonis George W. Gillett 1957-7-22 871 Lassen Lassen Volcanic National Park. Snag Lake, S shore 1850 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
  NY492641  Myosurus apetalus M. J. Williams 1986-5-14 8638- 3 Lassen Tuledad Canyon Road, from Duck Flat to Ravendale. 0.1 mile west of California-Nevada line. Comment
  SEINET12093181  Myosurus apetalus M. J. Williams, Schoolcraft, G.; Tiehm, A. 1986-1 86- 38 -3 Lassen Tuledad Canyon Rd., from Duck Flat to Ravendale. 0.1 mi W of Calif-Nev line Comment
  JEPS118467  Myosurus minimus Lowell Ahart, John Dittes 2011-6-21 17531 Lassen Bottom of a vernal pool, just west of the fence, about 300 yards southwest of the Parking Area west of the old barn, on the west side of Elkins Lane, Ash Creek State Wildlife Area, about 4.4 miles (air) west of Adin, about 7.2 miles (air) northeast of Bieber, Big Valley 1268 Comment
  NY492693  Myosurus minimus P. H. Raven 1958-6-17 13285 Lassen Along U. S. Highway 395, 1.9 miles south of Ravendale Comment
  RSA125293  Myosurus minimus Peter H. Raven 1958-6-17 13285 Lassen Along United States Hwy 395, 1.9 miles S of Ravendale. Comment
  JEPS45716  Myriophyllum quitense W. L. Jepson 1918-8-16 8002 Lassen Merrillville 1524 Comment
  CHSC30584  Myriophyllum sibiricum P. V. Caldwell 1972-6-16 264 Lassen 3/4 miles E, on Forest Rd. 5, 1 1/2 miles from the station in Kildeere ond. Comment
  CHSC66864  Myriophyllum sibiricum Vernon H. Oswald; Lowell Ahart 1996-9-10 8281 Lassen Mountain Meadows Reservoir SW of Westwood. Localized colony in shallow water along the railroad embankment at the northwest edge of the reservoir. 1539 Comment
  SEINET12185161  Myriophyllum sibiricum A. Tiehm, Schoolcraft, G. 1984-1 9243 Lassen Buckhorn Resevoir on the south side of Buckhorn road to Ravendale, about 6 mi W of state line T35N 1698 Comment
  SEINET10969184  Nama densa Mary Susan Taylor 1974-1 Taylor 305 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UC1561920  Nama densa var. densa Barbara Ertter with Gary Schoolcraft 1987-6-16 7198 Lassen saddle on e side of Hot Springs Peak, Skeedaddle Mountains on the ne side of Honey Lake Hot Springs Peak; Skeedaddle Mountains, Honey Lake, Hot Springs 2194 Comment
  UC1609381  Nama densa var. densa Vernon H. Oswald and Lowell Ahart 1993-6-14 5539 Lassen ca 2.0 mi ene Spaulding Tract Rd. (Rd. 518, 33N89) (Eagle Lake Rd. (Lassen A1) at Sandy Beach on w shore Eagle Lake); w shore Eagle Lake, at Sandy Beach 1566 Comment
  UCD87411  Nassella cernua T. S. Brandegee 1892-7-1 s.n. Lassen Susanville. Comment
  CHSC29925  Navarretia breweri Robin Ondricek 1978-6-7 41 Lassen Murrers Upper Meadow, .7 mi E of intersection with main road to ELFS and tunnel crossing. 1560 Comment
  UCD37481  Navarretia breweri Beecher Crampton 1960-6-20 5737 Lassen Lassen County, Lassen National Forest, 6.5 miles north of Bogard Ranger Station, Little harvey Valley. 1676 Comment
  UCD37483  Navarretia breweri Beecher Crampton 1960-6-21 5744 Lassen Lassen County, 15 miles northeast of Susanville, Horse Lake Mountain Range. 1706 Comment
  CHSC27643  Navarretia capillaris George Deniso 1978-7-21 98 Lassen E end of Mahogany L., S of Eagle L. Near E shore of lake. 2060 Comment
  CHSC44331  Navarretia divaricata Lowell Ahart; John Thomas Howell 1974-7-9 541 Lassen Along Eagle Lake Road, on the south-west side of Eagle Lake. 1584 Comment
  UC1058209  Navarretia divaricata subsp. vividior C. McMillan 1949-6-15 1541 Lassen 5 mi w Bieber Comment
  CHSC58847  Navarretia intertexta subsp. propinqua Vernon H. Oswald; Lowell Ahart 1992-7-16 5101 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. On bed of lake. White-flowered plants collected at McCoy Flat Reservoir. 1745 Comment
  UC1184059  Navarretia intertexta subsp. propinqua Jean Langenheim 1957-6-22 4366 Lassen Said Valley, ne part of Lassen County Said Valley Comment
  CHSC1253  Navarretia leptalea 1951-7-8 Lassen Pit River. 1524 Comment
  CHSC4760  Navarretia leptalea R. Carter 1967-7-14 615 Lassen Roadside on N side of rd. Ca. 2 mi E of Silver Lake along N side of Rd. (31N07). 1828 Comment
  SJSU11520  Navarretia leucocephala subsp. bakeri J. W. Tilden 1958-6-27 1295 Lassen Madeline, Madeline Plains 1615 Comment
  SEINET3860229  Navarretia leucocephala subsp. leucocephala Leigh A. Johnson 2006-1 06 -147 Lassen Lassen Natl. Forest: south side of Champs Flat Road, east end of Champs flat, a little west of Dow Flat road.; 0 1693 Comment
  CHSC110909  Navarretia leucocephala subsp. minima Lowell Ahart; John Dittes 2012-7-9 18288 Lassen . Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. About 100 yards southeast of the tall poles. 1267 Comment
  CAS-BOT-BC230389  Navarretia leucocephala subsp. minima Lincoln Constance 1946-7-3 s.n. Lassen Madeline Station Comment
  UCSB17434  Navarretia leucocephala subsp. minima Dearing, Hugh; Dearing, Margaret 1938-6-30 Lassen 50 miles south of Susanville 1219 Comment
  SEINET10496833  Navarretia propinqua Mary Susan Taylor 1974-1 Taylor 277 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  RSA164415  Nemacladus capillaris Clare B. Hardham 1961-6-16 7450 Lassen Gold Run Creek south of Susanville. Comment
  CHSC64865  Nemacladus rigidus Vernon H. Oswald; Lowell Ahart 1995-6-19 6893 Lassen Modoc Plateau. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 4.0 mi e of Hwy. 395. N side of the road. 1383 Comment
  POM68111  Nemacladus sigmoideus Marcus E. Jones 1897-6-18 s.n. Lassen Chat. 1524 Comment
  UC67087  Nemophila parviflora var. austiniae T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  NY1082721  Nemophila pedunculata N. H. Holmgren 1978-6-11 8911 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance 1680 Comment
  JEPS97321  Nicotiana attenuata Vernon H. Oswald and L. Ahart 1995-8-14 7182 Lassen T33N R14E NE1/4 Sec. 2, 5400 ft, Modoc Plateau, Sagebrush Scrub. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville 1645 Comment
  HSC42424  Nicotiana attenuata Barbara Kelly 1977-8-9 557 Lassen 20 mi. E Madeline on dirt road from Adin. 1 mi. E of 10 ton limit bridge over wash Comment
  UC7442  Nitrophila occidentalis J. Burtt Davy Jun 17 1897-Jun 24 1897 3326 Lassen Honey Lake Valley 1219 Comment
  CHSC54175  Nothocalais troximoides Vernon H. Oswald 1991-5-28 4627 Lassen Wayman Barn at the west end of Hunt Rd, Ash Creek Wildlife Area, ca. 5 miles northeast of Bieber. East of the barn. 1264 Comment
  RSA0009447  Nuphar lutea subsp. polysepala Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  HSC16519  Oenothera californica R. G. Means 1962-7-4 64 Lassen 10 mi. N of Doyle, Hwy. 395 1220 Comment
  JEPS29737  Oenothera deltoides subsp. piperi Rimo Bacigalupi and L. R. Heckard 1962-5-28 8492 Lassen along US Hwy 395 10 mi s Milford 1219 Comment
  UC566272  Oenothera deltoides subsp. piperi E. Sawyer 1935-6-27 231 Lassen Long Valley Sierraville Quadrangle 1310 Comment
  SEINET5345714  Oenothera deltoides var. piperi P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CHSC71384  Onopordum acanthium Vernon H. Oswald; Beth Corbin, Gary Schoolcraft 1998-7-13 9262 Lassen Near Bieber on Susanville Rd. (A2) 2.5 mi east of Hwy. 299. Roadside and fields. 1280 Comment
  JEPS88402  Oreostemma alpigenum var. andersonii Vernon H. Oswald and Lowell Ahart 1996-8-1 8121 Lassen Forest Rd. 28N56 (D-Line) ca. 2 mi n Dyer Mtn. Lookout (ssw of Westwood) 1737 Comment
  UC831401  Oreostemma alpigenum var. andersonii A. A. Heller 1937-9-1 15343 Lassen 1 mi e Westwood 1524 Comment
  HSC93438  Oreostemma elatum Vernon H. Oswald 1996-8-1 8120 Lassen FS Rd. 28N56 (D-line), 2 mi. N of Dyer Mtn. Lookout, SSW of Westwood 1738 Comment
  CHSC10945  Orobanche corymbosa K. D. Cox 1971-7-5 144 Lassen Approx. 1/4 mi. NW of main campus L.F.S. 1554 Comment
  UCR244039  Orobanche fasciculata Jim Andre 1993-6-1 19709 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, north end of Honey Lake, c. 20 mi. E of Susanville, at Wendel 1218 Comment
  CAS-BOT-BC500271  Orobanche uniflora subsp. occidentalis H. C. Cantelow 1941-5-22 s.n. Lassen 13.5 mi W of Susanville, at Fredonyer Pass Comment
  RSA408800  Orthocarpus Rockwell 1925-7-1 s.n. Lassen Eagle Lake Comment
  CAS-BOT-BC238447  Orthocarpus Mike Vasey 1990-6-30 9054 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  JEPS74940  Orthocarpus bracteosus T. I. and F. M. Chuang 1975-7-23 7553 Lassen along road to Mountains Meadow Reservoir about 2 mi <?> Westwood; along road to Mountains Meadow Reservoir Comment
  CHSC13631  Orthocarpus cuspidatus subsp. cryptanthus M. S. Taylor 1974-7-13 307 Lassen Ca. 15 ft w of Mahogany Lake, ca. 3 mi s of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 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
  JEPS9435  Orthocarpus cuspidatus subsp. cryptanthus Brown and Wieslander 42 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  UC1484779  Orthocarpus cuspidatus subsp. cryptanthus Noel H. Holmgren and Patricia K. Holmgren 1978-6-12 8933 Lassen 17 km (10.5 mi) airline distance ese Ravendale (s of Observation Peak, upper Smoke Creek); Upper Smoke Creek, just s of Observation Peak 1770 Comment
  SEINET13756747  Orthocarpus cuspidatus subsp. cryptanthus N. H. Holmgren, Patricia K. Holmgren 1978-6-12 8933 Lassen Upper Smoke Creek, just south of Observation Peak, 17 km (10.5 mi.) airline distance east-southeast of Ravendale. 1768 Comment
  RSA337231  Orthocarpus hispidus Noel Holmgren, Patricia K. Holmgren 1980-7-3 9483 Lassen US Highway 395, 7.4 km (4.6 mi) S of Ravendale. 1620 Comment
  RSA712893  Orthocarpus lacerus L. P. Janeway 2005-7-3 8454 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
  CHSC78408  Oryzopsis exigua Vernon H. Oswald; G. Schoolcraft, M. Dolan, B. Corbin 2000-6-18 9929 Lassen East-northeast of the lookout on Observation Peak located east of Ravendale. 2377 Comment
  NY404414  Oxytheca dendroidea E. K. Balls 1952-10-10 18140 Lassen 5.5 miles northeast of Litchfield, Highway 395, between Susanville and Alturas 1280.2 Comment
  RSA78899  Oxytheca dendroidea E. K. Balls, Percy C. Everett 1952-10-10 18140 Lassen 5.5 miles NE of Litchfield, Hwy 395, between Susanville and Alturas 1280 Comment
  CHSC63381  Packera cana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6312 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  JEPS114621  Packera cana Lowell Ahart, John Dittes 2008-6-19 14877 Lassen Open flat, 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
  JEPS117577  Packera cana Lowell Ahart, John Dittes 2010-7-31 16990 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1510 Comment
  JEPS25533  Packera eurycephala var. eurycephala Rimo Bacigalupi with Lincoln Constance 1959-6-16 7147 Lassen 3.7 mi s junction with road to Bieber (along county road from Susanville to Adin) 1615 Comment
  OBI49191  Packera eurycephala var. eurycephala Lewis S. Rose 1940-6-11 40505 Lassen 8 mi W of Nubieber 1219 Comment
  CHSC6195  Paeonia brownii P. Balch 1955-7-22 Lassen Roadside meadow 3 1/2 mi. from Antelope Lookout. Eagle Lake. 2133 Comment
  UC1126132  Paeonia brownii A. Simontacchi 1940-6-8 834 Lassen Halls Flat Ranger Station Lassen National Forest, Halls Flat Quadrangle Comment
  POM99648  Paeonia brownii Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  SEINET10537856  Paeonia brownii Billy Joe Cox, David B. Dunn 1971-6-2 Cox 2604 Lassen 6 mi n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 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
  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
  CDA5733  Pectocarya penicillata L. Ahart, J. Dittes 2005-6-1 11907 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
  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
  JEPS10720  Pedicularis attollens Brown and Wieslander 1922-7-23 29 Lassen Martin Springs; Eagle Lake Comment
  UC447220  Pedicularis groenlandica Franklin P. Nutting Lassen Pine Creek Comment
  JEPS3332  Pedicularis groenlandica George Gillett 1952-7-29 119 Lassen w slopes of Paradise Meadow; Lassen Volcanic National Park 2148 Comment
  HSC20946  Pedicularis semibarbata H. E. Parks, S. T. Parks Jun 1928 237 Lassen Drakesbad, Mt. Lassen, E side 1524 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
  CDA41877  Penstemon deustus T. C. Fuller 1963-7-15 10901 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  HSC68837  Penstemon deustus Gary Schoolcraft 1979-6-26 97 Lassen Small peak N of Radeo Flat 1951 Comment
  RSA401794A  Penstemon deustus subsp. sudans Francis W. Pennell 1940-6-9 25768 Lassen Route 36, hill west of Susanville. 1372 Comment
  RSA177476  Penstemon deustus subsp. sudans R. M. Straw 1962-6-29 2198 Lassen 10 miles W of Susanville on Cal 36. 1580 Comment
  NY591825  Penstemon deustus var. pedicellatus F. W. Pennell 1940-6-7 25722 Lassen Route 299, 11 miles west of Nubieber 1097.3 Comment
  CHSC57205  Penstemon gracilentus Mary Meyer 1980-7-23 Lassen Along Cleghorn Creek. 1645 Comment
  JEPS11269  Penstemon gracilentus Jos. Grinnell 1928-6-16 Lassen Eagle Lake Lassen Peak Region 1584 Comment
  JEPS28707  Penstemon gracilentus George W. Gillett 1957-7-28 936 Lassen near w shore, Widow Lake Lassen Volcanic National Park, Widow Lake 2072 Comment
  NY600719  Penstemon gracilentus A. M. Alexander 1946-8-13 5157 Lassen West side of Eagle Lake Comment
  UC1063167  Penstemon gracilentus H. P. Hagge 1935-9-12 27 Lassen Logan Mtn. Eagle Lake Quad., Logan Mtn. Comment
  UC1537436  Penstemon gracilentus Gordon H. True Jr. 1938-7-14 959 Lassen summit on Milford Grade , just on n slope (just on n slope) 1676 Comment
  RSA668193  Penstemon gracilentus Karl Vincent, Charlotte A. Labbe 1986-7-19 4382 Lassen Sierra Nevada, Roop Mtn. Along CA A1 at Eagle Lake Summit, ca 7.6 mi N of jct. CA 36, ca 7 air miles NW of Susanville. 1933 Comment
  NY627262  Penstemon neotericus A. A. Heller 1938-6-22 15181 Lassen 1 mile south of Westwood Comment
  UC887183  Penstemon neotericus A. A. Heller 1938-6-22 15181 Lassen 1 mi s Westwood; s of Westwood 1524 Comment
  SBBG28997  Penstemon neotericus D. D. Keck 1930-7-23 957 Lassen E of Westwood 1493 Comment
  CHSC5914  Penstemon newberryi J. B. Kimsey 1946-7-12 Lassen Gem Lake, Caribou Primitive Area. 2133 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
  CHSC4877  Penstemon roezlii R. Carter 1967-6-23 542 Lassen Growing ca. 5 yds off N side rd. Comment
  JEPS23794  Penstemon roezlii Rimo Bacigalupi with Lincoln Constance 1959-6-16 7138 Lassen Sandy playa beside U.S. 395 one-fourth mi s of junction of road to Smoke Creek; s of junction of rd to Smoke Creek 1341 Comment
  JEPS81837  Penstemon roezlii Rimo Bacigalupi with Lincoln Constance 1959-6-16 7138 Lassen beside U.S. 395 one-fourth mi s of junction of road to Smoke Creek; s of junction of rd to Smoke Creek 1341 Comment
  NY650094  Penstemon roezlii N. H. Holmgren 1978-6-11 8920 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  NY650100  Penstemon roezlii G. Schoolcraft 1982-6-16 701 Lassen North of Shinn Ranch 1548.4 Comment
  NY650129  Penstemon roezlii D. D. Keck 1930-7-23 954 Lassen 12 miles west of Susanville 1676.4 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
  CAS-BOT-BC239496  Penstemon rydbergii var. oreocharis E. K. Balls 1950-5-22 14830 Lassen .5 mi. north of turnoff to Heir [Herlong], Hwy 395, between Milford and Doyle 1280 Comment
  CHSC30583  Penstemon rydbergii var. oreocharis Leonard Walk 1972-6-29 48 Lassen Dean's Meadow on S. side of pond. 1981 Comment
  JEPS114709  Penstemon rydbergii var. oreocharis Lowell Ahart, John Dittes 2008-6-20 14919 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  NY651292  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-22 15182 Lassen 1 mile south of Westwood 1524.0 Comment
  POM252930  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen About 3 miles east of Westwood. Comment
  SJSU7940  Penstemon rydbergii var. oreocharis R. L. Fisher 1958-6-16 Lassen 6 mi S of Madeline Comment
  UC1012182  Penstemon rydbergii var. oreocharis Francis W. Pennell 1940-6-10 25774 Lassen Route 36 road to Coppervale R.S., e Westwood; e of Westwood 1493 Comment
  CHSC12458  Penstemon speciosus Robert W. Severin 1969-6-20 2 Lassen 4 miles s of E. L. B. S. in Dean's Meadow. 1950 Comment
  CHSC12482  Penstemon speciosus Carol Weld 1969-6-20 14 Lassen Road to Dean's Meadow from Five Corners. 1889 Comment
  CHSC25148  Penstemon speciosus L. E. Ray 1967-6-24 52 Lassen Collected ca. 8 miles s ELBS, Deans Meadow. 1950 Comment
  CHSC4438  Penstemon speciosus K. R. Stern 1967-6-30 2449 Lassen West Central side of Eagle Lake. 1554 Comment
  CHSC4821  Penstemon speciosus R. Carter 1967-7-21 625 Lassen Ca. 3 mi n of highway 395 on rd through Jonesville on e side of rd. Diamond Mountains. Comment
  CHSC5916  Penstemon speciosus J. B. Kimsey 1946-6-10 Lassen Eagle Lake. 1554 Comment
  RSA121810  Penstemon speciosus L. R. Short, J. Warren 1936-6-26 S- 357 Lassen Burges Spr. Exp. Range. 1845 Comment
  UCR183192  Penstemon speciosus Jim Andre, G. L. Clifton 1993-5-28 7713 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  POM203061  Penstemon speciosus J. T. Howell 1934-6-10 11905 Lassen 3 miles S of Ravendale. Comment
  RSA401877  Penstemon speciosus Francis W. Pennell 1940-7-23 26254 Lassen Route 395, 2 mi north of jct with Route 24, northeast of Plumas. 1524 Comment
  NY661060  Penstemon speciosus subsp. speciosus D. D. Keck 1930-7-23 947 Lassen Reno Junction (formerly Chats) southeastern Lassen County. 1493.5 Comment
  CAS-BOT-BC243415  Penstemon sudans John Thomas Howell 1934-6-10 11880 Lassen 12 miles N of Susanville on road to Horse Lake Comment
  CHSC66408  Penstemon sudans Vernon H. Oswald 1996-6-17 7781 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. On the N side of Hwy. 36 between the trail and highway bridges spanning the Susan River. 1432 Comment
  NY661800  Penstemon sudans H. D. D. Ripley 1943-6-13 5739 Lassen West of Susanville 1371.6 Comment
  UC886952  Penstemon sudans A. A. Heller 1938-6-22 15194 Lassen on Highway #36 on a stony slope e Fredonyer Pass; e of Fredonyer Pass 1645 Comment
  CHSC49042  Penstemon venustus Vernon Oswald 1986-7-22 2219 Lassen Hwy. 36, ca. 1 mi ne of Fredonyer Pass. 1706 Comment
  POM91106  Peraphyllum ramosissimum Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 6 miles north. 1524 Comment
  UC191152  Peraphyllum ramosissimum C. F. Sonne Jun 1879 Lassen near Susanville (West Valley, Buffalo Ravine); Buffalo Ravine Comment
  CHSC29907  Perideridia bolanderi Robin Ondricek; Wesley Dempsey 1978-6-7 43 Lassen Ridge E of Lower Dry Lake, 12.5 mi N of Susanville. 1706 Comment
  CHSC42647  Perideridia bolanderi subsp. bolanderi Vernon Oswald 1986-5-28 2049 Lassen Hwy 36, 11.3 mi e of the Plumas-Lassen Co. line, 0.5 mi sw of Fredonyer Pass. 1691 Comment
  CHSC64859  Perideridia bolanderi subsp. bolanderi Vernon H. Oswald; Lowell Ahart 1995-6-19 6900 Lassen Modoc Plateau. Between Litchfield and Rravendale on Smoke Creek Ranch Rd., 7.6 mi e of Hwy. 395. 1444 Comment
  NY1102214  Perideridia bolanderi subsp. bolanderi G. Schoolcraft 1989-5-31 1889 Lassen Skedaddle Ranch Rd. about 6 miles north of Wendel Road 1494 Comment
  JEPS117580  Perideridia lemmonii Lowell Ahart, John Dittes 2010-7-31 16991 Lassen On the south side of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  CAS-BOT-BC423341  Peritoma platycarpa H. D. Ripley; R. C. Barneby 1943-6-15 5757 Lassen Nr. Viewland 1310 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
  CHSC6229  Persicaria amphibia J. B. Kimsey 1946-6-24 Lassen Pine Creek, Eagle Lake. 1584 Comment
  CHSC77223  Persicaria lapathifolia G. Schoolcraft 1996-9-11 2560 Lassen Lower end of Willow Creek below petroglyphs and above dam. 1341 Comment
  CAS-BOT-BC7522  Phacelia adenophora Elmer Ivan Applegate 1897-6-3 895 Lassen Madeline Plains Comment
  CHSC704  Phacelia adenophora A. Santos 1946-6-20 Lassen Grasshopper Valley. 1615 Comment
  HSC28828  Phacelia adenophora D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19305 Lassen Along Hwy. 395, 4 mi. E of Standish Comment
  RSA38631  Phacelia adenophora P. A. Munz 1947-5-19 11871 Lassen 19 miles south of Ravendale. 1341 Comment
  POM230485  Phacelia adenophora D. D. Keck, Jens Clausen 1935-6-24 3736 Lassen 2 miles south of Ravendale. 1463 Comment
  POM98589  Phacelia adenophora F. W. Peirson 1926-6-24 6851 Lassen Madeline Plain. Comment
  CHSC48469  Phacelia glandulifera Vernon Oswald 1986-5-28 2056 Lassen Road 201 on the w side of Eagle Lake, 28.7 mi n of Hwy 36, 6.8 mi sw of Hwy 139. 1584 Comment
  CHSC60746  Phacelia glandulifera Vernon H. Oswald; Lowell Ahart 1993-6-14 5541 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
  UC1609410  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  JEPS78146  Phacelia hastata Gary W. Zamzow 1972-7-19 89 Lassen Hwy 139 15 mi s Adin; Willow Creek campground 1524 Comment
  RSA716141  Phacelia hastata subsp. compacta L. Ahart, John Dittes 2005-6-2 11950 Lassen Along a poor dirt road, about one mile northeast of the Anderson Ranch home, Long Valley, about five and a half miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction. 1499 Comment
  CHSC91193  Phacelia heterophylla subsp. virgata Lowell Ahart; John Dittes 2005-6-2 11952 Lassen Along a poor dirt road, about 1/2 mile west of the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) northwest of the intersection of Scott Road and Highway 70, 6.6 miles (air) northwest of Hallelujah Junction. 1512 Comment
  UC107564  Phacelia heterophylla subsp. virgata T. S. Brandegee 1892-6-26 Lassen Milford Comment
  HSC30186  Phacelia humilis D. H. Norris, S. Dowty, T. Nelson 1971-6-22 19265 Lassen Harvey Valley near Cone Springs Comment
  UC1069416  Phacelia humilis A. Simontacchi 1940-5-17 751 Lassen 1.1 mi ssw Dixie Spring; Lassen National Forest, Halls Flat Quadrangle 1699 Comment
  UC699731  Phacelia humilis Farris Farris 1936-6-5 Lassen Diamond Mountain 1828 Comment
  SDSU6647  Phacelia humilis D. F. Howe 1964-7-1 3914 Lassen 4.8 miles from Harvey Creek on ridge road, warner Mts. Modoc National Forest. 2134 Comment
  JEPS94103  Phacelia linearis Vernon H. Oswald and Lowell Ahart 1998-5-22 9106 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
  UC24433  Phacelia linearis Mrs. R. M. Austin Jun. 1894 Lassen Willow Creek Comment
  NY998461  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 miles south of Ravendale Comment
  POM73491  Phacelia linearis Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  RSA303850  Phacelia linearis Jim R. Shevock 1972-5-20 1819 Lassen Highway 395, Honey Lake. 1311 Comment
  NY1056439  Phacelia lutea var. glandulifera W. W. Eggleston 1911-7-7 7166 Lassen Secret Valley 1330 Comment
  CHSC111256  Phacelia mutabilis L. P. Janeway; B. Castro 2012-7-3 10939 Lassen Modoc Plateau. Near top of Shaffer Mountain, southeast-facing slope, steep and very rocky with lots of outcrops of hard dark volcanic rock. 2012 Comment
  SD58172  Phacelia mutabilis Frances Payne 1929-7-12 85 Lassen NE Warner Mts., Ridge above Lost Lake 2438 Comment
  JEPS109642  Phacelia thermalis Dean W. Taylor 2002-6-21 18170 Lassen Highway 139 ca. 10 miles N of Susanville, ca. 1 mile south of the southerly end of Willow Creek Valley 1524 Comment
  NY1057981  Phacelia thermalis N. H. Holmgren 1980-7-3 9464 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 miles) south of Madeline. 1620 Comment
  RSA38633  Phacelia thermalis P. A. Munz 1947-5-19 11878 Lassen Highway 395, 4 miles south of Madeline. Comment
  SEINET3091880 Image available Phacelia thermalis Arnold Tiehm, Raymond Evans, James Young. 1984-6-7 8595 Lassen Flats on the Northwest side of Shaffer Mountain, 9 air miles North-northwest of Litchfield. 1372 Comment
  UC526141  Phacelia thermalis John Thomas Howell 1934-6-16 12222 Lassen Bieber Comment
  CHSC7695  Phalaris arundinacea Beverley J. Wise 1969-6-4 135 Lassen 2 mi. east of Susanville on Las. Co. Rd. 215. 1310 Comment
  RSA299298  Phalaris arundinacea J. T. Howell 1974-7-8 50477 Lassen Susanville 1296 Comment
  UCD88537  Phalaris arundinacea R. Tofsrud 1947-7-20 257 Lassen Near Pittville. Comment
  RSA0035915  Phlox gracilis Lowell A. Ahart, John Dittes 2008-6-20 14929 Lassen About 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC1137763  Phlox gracilis August L. Hormay 1934-5-9 Lassen Black Mt. Headquarters Lassen National Forest 1706 Comment
  RSA304681  Phlox hoodii var. canescens Jim Shevock 1971-4-9 944 Lassen Hwy 299, E of Dana. 1067 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
  RSA715614  Phlox speciosa subsp. occidentalis L. Ahart, John Dittes 2005-6-1 11846 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  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
  CHSC76837  Phoradendron densum L. P. Janeway; B. Castro, Loren Gehrung 1999-10-10 6595 A Lassen High Cascade Range. Near Eiler Creek between Fraener Peak and Horse Heaven Buttes; at Cypress Trailhead into Thousand Lakes Wilderness Area. 1639 Comment
  CAS-BOT-BC250985  Phragmites australis John Thomas Howell 1975-7-23 51415 Lassen Long Valley Creek bridge on Hwy. 395 southeast of Constantia Comment
  HSC23512  Pinus contorta var. murrayana L. B. Barlow 1967-7-14 125 Lassen E shore of Silver Lake 1829 Comment
  UCSB48306  Plagiobothrys canescens Hardham, Clare 1961-6-17 Lassen Baxter Creek S. of Susanville 1676 Comment
  CHSC60823  Plagiobothrys cognatus Vernon H. Oswald; Lowell Ahart 1993-6-28 5626 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. On the bed of a branch of Pine Creek. 1737 Comment
  CHSC110913  Plagiobothrys cusickii Lowell Ahart; John Dittes 2012-7-9 18284 A Lassen Along a very small drainage, 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
  CHSC115608  Plagiobothrys cusickii Lowell Ahart; John Dittes 2015-7-13 20305 Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC93708  Plagiobothrys cusickii Lowell Ahart; John Dittes 2005-6-1 11906 Lassen Depression on the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  HSC104018  Plagiobothrys cusickii L. Ahart, John Dittes 2012-7-9 18284 Lassen About 5.5 air mi. NE of Bieber, Ash Creek Wildlife Area, ~100 yds. SE of tall poles 1268 Comment
  JEPS114769  Plagiobothrys cusickii Lowell Ahart, John Dittes 2008-6-20 14914 Lassen In vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS124383  Plagiobothrys cusickii Lowell Ahart, John Dittes 2015-7-13 20305 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC115562  Plagiobothrys hispidulus Lowell Ahart; John Dittes 2015-7-13 20318 Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC29970  Plagiobothrys hispidulus R. A. Schlising 1979-6-7 3452 Lassen S end of Eagle Lake, at Papoose Creek and Meadow in Lassen National Forest. In streambed. 1584 Comment
  CHSC60334  Plagiobothrys hispidulus Mary Ann Showers 1992-6-12 2530 a Lassen Lassen Volcanic National Park. Meadow, Butte Lake. 1859 Comment
  CAS-BOT-BC224969  Plagiobothrys hispidulus David D. Keck; J. Clausen 1935-6-25 3764 Lassen 2 miles W of Fredonyer Pass, between Susanville and Westwood 1525 Comment
  CAS-BOT-BC224976  Plagiobothrys hispidulus Clarence R. Quick 1962-6-17 62 27 C Lassen Swains Hole, S of Blacks Mountains Experimental Station 1615 Comment
  SJSU8065  Plagiobothrys hispidus J. W. Tilden 1960-6-27 1495 Lassen Westwood 1524 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
  JEPS88405  Plagiobothrys mollis var. mollis Vernon H. Oswald and Lowell Ahart 1996-8-1 8112 Lassen Mountain Meadows Reservoir s.w. of Westwood (receding shore of the reservoir n.e. of Indian Ole Dam); Mountain Meadows Reservoir 1539 Comment
  RSA0035395  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2008-6-20 14921 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
  CHSC91317  Plagiobothrys tenellus Lowell Ahart; John Dittes 2005-6-1 11883 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
  CDA14311  Plagiobothrys tenellus W. Ogden 1998-6-25 s.n. Lassen Allen Farms Rd., near Doyle. 0 Comment
  SEINET3152918  Plagiobothrys tenellus E. K. Balls 1950-5-9 15950 Lassen 12 miles N of Doyle, hwy 395. 1295 Comment
  RSA0086588  Plantago Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  HSC16636  Platanthera dilatata var. leucostachys H. E. Parks, S. T. Parks Jun 1928 217 Lassen Lassen National Park, Drakesbad 1768 Comment
  HSC95284  Platanthera dilatata var. leucostachys Gordon Leppig 1998-7-12 941 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC6278  Platanthera leucostachys M. West 1946-7-7 Lassen Butte Creek. Comment
  UC726205  Platanthera leucostachys A. A. Heller 1938-7-28 15298 Lassen 2 mi e Westwood 1524 Comment
  SD7498  Platanthera sparsiflora Mrs. R. M. Austin 1880-1 Lassen No further locality information given on label on specimen sheet. Comment
  POM260454  Plectritis congesta subsp. brachystemon C. Leo Hitchcock 1940-5-26 6604 Lassen Lava beds ca 12 miles north of Fall River Mills (Shasta Co.) on Fall River. 1372 Comment
  CAS-BOT-BC326710  Pleiacanthus spinosus John Thomas Howell 1961-9-25 36971 Lassen East side of Beckwourth Pass, Sierra Nevada 1554 Comment
  CAS-BOT-BC326718  Pleiacanthus spinosus John Thomas Howell 1974-7-8 50493 Lassen Between Camp Connell and Camp Menzies, Sierra Nevada 1295 Comment
  HSC79990  Pleiacanthus spinosus William Rothstrom 1975-6-9 Lassen Johnstonville, 0.25 mi. S of Hwy. 395, W of airport Comment
  UC768477  Pleiacanthus spinosus Robert F. Hoover 1940-9-28 4630 Lassen Susanville Comment
  CHSC58052  Poa bulbosa Vernon H. Oswald 1992-5-18 4942 Lassen Lassen Volcanic National Park. Butte Lake Campground. Woods bordering the service road near the boat launching area. 1847 Comment
  UC1924563  Poa bulbosa Debra Valov 2006-5-30 2006035 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UCD90605  Poa bulbosa Alan A. Beetle; G. L. Stebbins Jr. 1942-5-29 3364 Lassen at Nubieber, near dwellings. Comment
  UCD90624  Poa bulbosa Beecher Crampton 1964-6-27 7096 Lassen ca. 8 miles southeast of Ravendale Bureau Land Management Spanish Springs--Shinn Mtns. Resource Conservation area. 1981 Comment
  SEINET10517067  Poa bulbosa Billy Joe Cox 1971-6-2 Cox 2990 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
  CHSC112468  Poa bulbosa subsp. vivipara Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18748 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  RSA115224  Poa compressa Beecher Crampton 1956-7-17 3736 Lassen Ca. 2.5 miles north of Emigrant Gap. 1372 Comment
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Apr 28 2013
  UCD37475  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen Lassen County, 6 miles southeast of Jess Valley, 3 miles east of Blue Lake, southern Warner Mountains. 2133 Comment
  JEPS107465  Poa pratensis subsp. pratensis Lowell Ahart, John Dittes 2005-6-1 11848 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UCR244104  Poa pratensis subsp. pratensis Jim Andre, G. L. Clifton 1993-6-9 19698 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  POM264256  Poa secunda A. A. Beetle 1941-6-28 2794 Lassen 10 mi west of Chester, Rte.36 Comment
  POM267991  Poa secunda D. D. Keck 1944-7-8 5449 Lassen 1.5 mi W. of Susanville, on rim of plateau overlooking Susan River canyon 1341 Comment
  RSA647529  Poa secunda Marion P. Harthill 1972-6-17 821 Lassen Madeline. 1677 Comment
  UCD90322  Poa secunda A. A. Beetle; G. L. Stebbins Jr. 1942-5-30 3365 Lassen Nubieber. Comment
  CAS-BOT-BC236250  Poa secunda subsp. juncifolia P. B. Kennedy 1901-6-10 s.n. Lassen Railroad Station, Constantia Comment
  CAS-BOT-BC236258  Poa secunda subsp. juncifolia David D. Keck 1944-7-8 5456 Lassen 5 miles E of Westwood on road to Fredonyer Pass 1584 Comment
  CHSC33318  Poa secunda subsp. juncifolia P. Reynolds 1979-7-4 18 Lassen 3 mi. NE of Wendel, Wendel Canyon in the Skedaddle Mtn. Range. 1371 Comment
  SEINET7294034 Image available Poa secunda subsp. juncifolia John Thomas Howell, Gordon H. True; Margaret Williams 1973-1 49460 Lassen Elysian Valley, W of Janesville 1326 Comment
  UC1024831  Poa secunda subsp. juncifolia Leo Whitney 1935-6-12 3229 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1143013  Poa secunda subsp. juncifolia August L. Hormay 1934-7-2 Lassen 1/4 mi nw Black's Mt; Lassen Nat'l Forest 1706 Comment
  UC1776716  Poa secunda subsp. juncifolia G. Schoolcraft 1994-7-6 2348 Lassen About 1.5 miles NE of Red Rock Lake 2042 Comment
  UC188907  Poa secunda subsp. juncifolia Milo S. Baker Lassen Dixie Valley Comment
  UC699670  Poa secunda subsp. juncifolia Gus Hormay 1944-7-2 Lassen Halls Flat 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
  SEINET7854865  Poa secunda subsp. juncifolia G. Schoolcraft 1995-5-22 2489 Lassen East of Skedaddle Ranch. 1554 Comment
  CAS-BOT-BC236178  Poa secunda subsp. secunda Doris Kildale Gillespie 1930-5-13 9362 Lassen Between Susanville and Janesville Comment
  CAS-BOT-BC236182  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49188 Lassen Elysian Valley NW of Janesville 1325 Comment
  HSC10738  Poa secunda subsp. secunda R. S. White 1965-5-15 74 Lassen 10 mi. W of Susanville on Hwy. 36 Comment
  RSA715613  Poa secunda subsp. secunda L. Ahart, John Dittes 2005-6-1 11845 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC1132871  Poa secunda subsp. secunda A. Simontacchi 1940-5-28 784 Lassen 3.2 mi wsw Patterson Mt; Lassen Nat'l Forest, Halls Flat Quadrangle Comment
  UCD91653  Poa secunda subsp. secunda John Thomas Howell; Gordon H. True, Margaret Williams 1973-5-12 49196 Lassen Sierra Nevada. Elysian Valley northwest of Janesville. 1325 Comment
  CHSC7768  Polemonium micranthum Beverly J. Wise 1969-4-20 92 Lassen 13.2 mi. East of Susanville on Las. Co. Rd. 215. 1463 Comment
  JEPS17614  Polemonium occidentale Rimo Bacigalupi 1955-7-20 5404 Lassen on grade 2.3 mi s Patterson Ranger Station ([and 0.8 mi s of Lassen-Modoc county line], meadowy spots along East Creek, southern end of the Warner Mountains); Modoc National Forest, Warner Mountains, East Creek 2011 Comment
  CAS-BOT-BC263248  Polemonium pulcherrimum var. pulcherrimum R. Stubbs 2010-8-9 019 Lassen Dixie Mountain Peak Lookout. Only seen down trail from lookout towards bathroom on the south slope 2516 Comment
  NY1002472  Polygala subspinosa H. D. D. Ripley 1943-6-15 5760 Lassen East of Viewland 1311 Comment
  UCD109689  Polygala subspinosa T. Wendt; E. Lott 1975-6-12 1031 Lassen 4.5 mi. E of Rte 395 on Smoke Creek Ranch Road, E. of Mud Flat. 1371 Comment
  NY652201  Polygonum amphibium var. stipulaceum G. Schoolcraft 1996-9-12 2571 Lassen In Willow Creek north of Susanville 1493.5 Comment
  SEINET10937589  Polygonum amphibium var. stipulaceum Mary Susan Taylor 1974-1 Taylor 312 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC419770  Polygonum argyrocoleon Luella Bass 1976-9-1 s.n. Lassen Willard Creek w. of Susanville Comment
  JEPS31669  Polygonum convolvulus W. L. Jepson 1939-8-11 19376 Lassen Milford 1280 Comment
  RSA104503  Polygonum douglasii Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville 1524 Comment
  CHSC64889  Polygonum douglasii subsp. johnstonii Vernon H. Oswald; Lowell Ahart 1995-6-19 6880 Lassen Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395. In a shallow wash. 1383 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
  JEPS117589  Polygonum douglasii subsp. spergulariiforme 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 air miles northwest of Moll Reservoir, 2.8 air miles west of Ash Valley, 8.4 air miles southeast of Adin 1521 Comment
  JEPS46148  Polygonum douglasii subsp. spergulariiforme Duncan Dunning 1921-8-11 Lassen 3 mi s Antelope Mountain (sw of Eagle Lake); Martin Spring Comment
  RSA122844  Polygonum kelloggii L. R. Short, Wm. Gansberg 1936-6-8 s 390 Lassen Burgess Spring, Exp Range. 1744 Comment
  UC1603211  Polygonum polygaloides J. Guardino 1993-6-8 261 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 Comment
  CAS-BOT-BC419858  Polygonum polygaloides subsp. confertiflorum John Thomas Howell 1973-7-10 49762 Lassen Near Westwood 1554 Comment
  CHSC110776  Polygonum polygaloides subsp. confertiflorum Dean Wm. Taylor 2012-7-18 21278 Lassen Cascade Ranges. Windmill Flat tributary Juniper Creek, Pit River Watershed, 11 miles S of Adin). 1706 Comment
  CHSC78483  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald 2000-7-31 9948 Lassen Spur road leading from Forest Road 28N15 to the small pond on the crest of Diamond Mountain. 2215 Comment
  CHSC99126  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes 2008-6-22 15038 Lassen About 220 yards northwest of the road levee, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  UC1192317  Polygonum polygaloides subsp. confertiflorum Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 757 Lassen marsh on Great Northern Railroad Nubeiber (Hwy 299) Comment
  CHSC4773  Polygonum polygaloides subsp. kelloggii R. Carter 1967-6-27 559 Lassen Ca. 10 yds. off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 Comment
  JEPS97417  Polygonum ramosissimum Vernon H. Oswald and L. Ahart 1995-6-19 6880 Lassen T30N R15E center Sect. 22, 4540 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.3 mi e of Hwy. 395 1383 Comment
  UC506934  Polygonum sawatchense subsp. oblivium George A. Fischer and Irwin H. Johnson 1938-7-14 F 248 Lassen Lassen National Forest 1767 Comment
  JEPS88215  Polygonum sawatchense subsp. sawatchense Vernon H. Oswald and Lowell Ahart 1996-6-24 7864 Lassen 2.5 mi. s. Eagle Lake (Papoose Meadows located ca. 0.5 mi. e. of Eagle Lake Rd.(A1), on w. side of the meadow ca. 0.4 mi. s. of the cabins, Modoc Plateau); Modoc Plateau, Papoose Meadows 1633 Comment
  CAS-BOT-BC420159  Polygonum sawatchense subsp. sawatchense G. Schoolcraft 1988-6-15 1814 Lassen Ash Valley RNA/ACEC 16 miles east of Adin 1584 Comment
  CAS-BOT-BC420976  Polygonum spergulariiforme Clare B. Hardham 1969-8-28 17432 Lassen Slope west of Janesville Comment
  CDA22787  Polygonum spergulariiforme L. Ahart 2003-8-17 10515 Lassen On the west side of the paved road, on the east side of Highway 36, about 1/4 mile southwest of the Susan River, about 8 miles (air) southwest of Susanville. Comment
  CHSC110900  Polypogon monspeliensis Lowell Ahart; John Dittes 2012-7-9 18300 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. About 100 yards southeast of the tall poles. 1267 Comment
  CHSC67067  Populus fremontii Willis Ball 1969-6-25 33 Lassen Found in Upper Murrer's Meadow. 1584 Comment
  CHSC71386  Porterella carnosula V. Oswald; B. Corbin, M. Dolan, V. Sanger, G. Schoolcraft 1998-7-13 9259 Lassen Moll Reservoir in Ash Valley southeast of Adin. 1615 Comment
  UC1483818  Porterella carnosula G. Schoolcraft 1980-7-16 318 Lassen Nelson Corral Reservoir 1804 Comment
  SEINET10460819  Porterella carnosula G. Ledyard Stebbins 1949-8-6 Stebbins 4002 Lassen Edge of Feather Lake, between Susanville and McArthur. Mud flats 1676 Comment
  SEINET10460828  Porterella carnosula Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 Holmgren 9463 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi.) south of Madeline. T36N R13ES9 1620 Comment
  SEINET10460832  Porterella carnosula Robinson Robinson 71 Lassen 1737 Comment
  SEINET10460836  Porterella carnosula Rimo Bacigalupi Bacigalupi 6023 Lassen In rich peaty black soil of ditches along U.S. Highway 395, Madeline Plains, 3.1 miles south of Madeline 1615 Comment
  SEINET10972533  Porterella carnosula Mary Susan Taylor 1974-1 Taylor 308 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC7716  Portulaca oleracea Beverley J. Wise 1969-6-3 6 Lassen Susanville, 833 Mark St. 1310 Comment
  RSA772320  Potamogeton Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47202 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  CHSC60933  Potamogeton diversifolius Vernon H. Oswald; Lowell Ahart 1993-7-8 5666 Lassen Pittville Rd. (Lassen 111, 36N01) 2.4 mi N of Hwy. 44, on the NE edge of Poison Lake. 1705 Comment
  CHSC4840  Potamogeton filiformis R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  UC1100079  Potamogeton pectinatus Verne Grant, Irving Schneider 1947-7-29 8182 Lassen 1 mi e (upstream) of Tule Lake; Cedar Creek Comment
  UC1100047  Potamogeton pusillus var. pusillus Malcolm A. Nobs, S. Galen Smith 1949-7-20 1045 Lassen Bieber, along Highway 299 Bieber Comment
  CHSC55814  Potamogeton richardsonii Vernon H. Oswald 1991-9-23 4876 Lassen Lassen Volcanic National Park. Butte Lake in the northeast corner of the park. At the first spit of land extending into the lake south of its outlet. 1841 Comment
  UC60850  Potamogeton zosteriformis J. Burtt Davy Jun 17 1897-Jun 24 1897 3356 Lassen near Amedee; Honey Lake Valley Comment
  CHSC64894  Potentilla basaltica Vernon H. Oswald 1995-6-26 6933 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527) 0.4 mi n of Spooner Rd. in Ash Valley. On the w side of the road adjacent to a flat of low sagebrush. 1542 Comment
  UC1598197  Potentilla basaltica G. L. Clifton 1988-7-20 18126 Lassen near Ash Valley; Likely Quad., near Ash Valley 1541 Comment
  NY831702  Potentilla biennis V. E. Grant 1947-7-30 8189 Lassen South point of west embayment, Tule Lake Comment
  UC12514  Potentilla breweri M. S. Baker and Frank Nutting 1894-7-28 Lassen Bridge Creek Comment
  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
  CHSC5044  Potentilla glandulosa subsp. nevadensis L. B. Barlow 1967-7-4 87 Lassen 5 mi s of Eagle Lake Biological Station on Gallatin Beach Road. 1737 Comment
  CAS-BOT-BC141633  Potentilla gracilis var. elmeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49452 Lassen Elysian Valley, west of Janesville - Sierra Nevada 1325 Comment
  CAS-BOT-BC540369  Potentilla gracilis var. fastigiata B. C. Cain 1925-8-24 76 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  CHSC4889  Potentilla millefolia L. G. Bennett 1967-7-17 166 Lassen 0.3 mi n of junction of Silver Lake Road and Hwy 44, on Hwy 44. 1975 Comment
  SJSU5819  Poteridium annuum J. W. Tilden 1960-6-27 1503 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  SDSU9858  Primula tetrandra D. F. Howe 1964-7-31 3899 Lassen Warner Mtns. Modoc National Forest. 1890 Comment
  CHSC106677  Prunus andersonii Zachary Garcia 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC35955  Prunus andersonii M. S. Taylor 1982-5-7 4424 Lassen Reno Junction and along old road paralleling Hwy 70 just e of Beckwourth Pass. 1524 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
  JEPS27652  Prunus emarginata W. L. Jepson 1918-8-2 7788 Lassen Long Valley 1371 Comment
  UCD113178  Prunus emarginata Donna Allen 1977-4-20 s.n. Lassen Jamesville grade 1 mile off Highway 89. Comment
  CAS-BOT-BC154771  Prunus virginiana var. demissa L. B. Barlow 1967-7-1 63 Lassen 5 mi. north of Eagle Lake Marina, west central shore Eagle Lake, Eagle Lake Road 1554 Comment
  CHSC6259  Prunus virginiana var. demissa R. Gein 1946-6-11 Lassen Eagle Lake. On Pine Creek. 1580 Comment
  RSA123193  Prunus virginiana var. demissa L. R. Short, Wm Gansberg 1936-7-3 S- 466 Lassen MDM. Burgess Spr. Exp. Range. 1848 Comment
  UC1128504  Prunus virginiana var. demissa A. Simontacchi 1940-6-4 800 Lassen 7.1 mi sw of Jacks Lake (Lassen National Forest); Lassen National Forest 1836 Comment
  CAS-BOT-BC357281  Pseudognaphalium microcephalum Clare B. Hardham 1969-8-28 17424 Lassen Slope west of Janesville Comment
  CAS-BOT-BC357283  Pseudognaphalium microcephalum John Thomas Howell; Gordon H. True 1973-8-1 50155 Lassen Gold Run Creek road south of Susanville, Diamond Range 1584 Comment
  CHSC61950  Pseudognaphalium thermale Brian Murray 1992-5-31 3 Lassen 1/2 mile East of four corners on Willow Creek Rd. On the side of the road. Comment
  CAS-BOT-BC239801  Pseudoroegneria spicata John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50693 Lassen South and southeast of Diamond Mt. 2286 Comment
  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
  CHSC29919  Pseudostellaria jamesiana Robin Ondricek 1978-6-27 73 Lassen On Coleman Lake Rd., 1977 burn area. 1950 Comment
  CHSC67079  Pseudostellaria jamesiana Jeanne Boze 1981-6-13 116 Lassen On northeast slope of Galletin Peak. 1981 Comment
  CHSC60878  Psilocarphus brevissimus var. brevissimus Vernon H. Oswald; Lowell Ahart 1993-7-8 5671 Lassen Halls Flat Rd. (33N18), 1.4 mi SSW of Pittville Rd. (Lassen 111, 36N01), ca. 5.4 mi (air) NW of Poison Lake. On the W side of the road. 1694 Comment
  SEINET3823221 Image available Pterospora andromedea A. A. Heller 1938-7-28 15302 Lassen About 2 miles east of Westwood in leaf mold. Transition Life Zone 1524 Comment
  CAS-BOT-BC239824  Puccinellia lemmonii James Jokerst 1983-7-24 1884 Lassen Near Madeline Plains 1614 Comment
  UCD91890  Puccinellia lemmonii Freed W. Hoffman 1946-5-28 1820 Lassen Beiber. Comment
  CDA32666  Puccinellia lemmonii Gary Schoolcraft 2000-6-19 2906 Lassen Flat southeast of Ravendale BLM Fire Station. 0 Comment
  SEINET4890224  Puccinellia lemmonii N. H. Holmgren, P. Holmgren 1978-6-13 8939 Lassen 2.7 km (1.7mi) north-west of Wendel. 1250 Comment
  CHSC7722  Purshia tridentata Beverley J. Wise 1969-5-4 94 Lassen 3.0 mi west on Shaeffer Mtn Lookout rd off Hwy 395, 27.4 mi. east of Susanville. 2042 Comment
  UCR17285  Purshia tridentata Frank C. Vasek 1975-7-11 750711- 36 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  CAS-BOT-BC147819  Purshia tridentata var. tridentata Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16321 Lassen Along California Highway 36, about 6 miles W of Susanville Comment
  HSC79989  Purshia tridentata var. tridentata William Rothstrom 1975-6-9 Lassen Johnstonville, 1/4 mi. S of Hwy. 395, W of airport. 1265 Comment
  RSA152670  Purshia tridentata var. tridentata Dorothy Wiggins 1961-6-10 16321 Lassen Along California Highway 36. ABout 6 miles W of Susanville. Comment
  RSA60361  Purshia tridentata var. tridentata E. K. Balls 1950-5-9 15946 Lassen 6 miles S of Doyle, Hwy 395 1372 Comment
  UC1167550  Purshia tridentata var. tridentata E. C. Nord 1958-7-12 108 Lassen near Janesville (near Plumas National Forest) 1371 Comment
  UC12421  Purshia tridentata var. tridentata M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  UC1924592  Purshia tridentata var. tridentata Debra Valov 2006-5-28 2006002 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1284 Comment
  CHSC59803  Pyrola dentata Mary Meyer 1980-7-31 Lassen Forest adjacent to road. 1828 Comment
  CAS-BOT-BC462758  Pyrola dentata Louella Bass 1973-6-23 EU- 130 Lassen Elysian Valley 1325 Comment
  CHSC66723  Pyrola picta Vernon H. Oswald; Lowell Ahart 1996-8-1 8130 Lassen Forest Rd. 28N56 (D-Line) ca. 0.6 mi NNW of Dyer Mtn. Lookout, SSW of Westwood. 2011 Comment
  UC412675  Pyrola picta Franklin P. Nutting Jul 1930 Lassen Silver Lake Comment
  CAS-BOT-BC466054  Pyrola picta Clare B. Hardham 1971-8-22 18389 Lassen Diamond MOuntain 2133 Comment
  CAS-BOT-BC362265  Pyrrocoma carthamoides var. cusickii John Thomas Howell 1934-7-6 12453 Lassen Harvey Valley Comment
  UC1332443  Pyrrocoma carthamoides var. cusickii Ralph K. Gierisch 1968-7-11 3342 Lassen Harvey Valley Lassen National Forest, Harvey Valley 1676 Comment
  UC35837  Pyrrocoma carthamoides var. cusickii M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake 1524 Comment
  UC1561924  Pyrrocoma hirta var. hirta Barbara Ertter 1987-7-25 7312 a Lassen Pine Creek Valley at junction of Bridge Creek Springs Road ca 22 airmiles nw Susanville; Pine Creek Valley 1737 Comment
  CHSC58834  Pyrrocoma hirta var. lanulosa Vernon H. Oswald; Lowell Ahart 1992-7-16 5129 Lassen Feather Lake on the S side of Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), ca. 0.4 mi E of Champs Flat Rd. (County Rd. 105, Forest Rd. 32N02), between Old Station and Susanville. On the margin of the lake. 1749 Comment
  UC773928  Pyrrocoma hirta var. lanulosa L. R. Short and J. Warren 1936-8-17 S- 496 Lassen Burgess Spring Experiment Range Lassen National Forest, Burgess Spring Experiment Range 1783 Comment
  UCD135332  Pyrrocoma lanceolata var. subviscosa Richard Alan Mayes 1973-7-23 89 Lassen 43 miles south of Alturas, on US Hwy 395. Comment
  CAS-BOT-BC105245  Quercus kelloggii John Thomas Howell 1973-7-10 49788 Lassen 3 miles W of Susanville 1371 Comment
  CHSC91189  Quercus kelloggii Lowell Ahart; John Dittes 2005-6-2 11942 Lassen Along a small stream, about 1 1/2 miles northeast of the Anderson Ranch home, Long Valley, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction. 1601 Comment
  LA205323  Quercus kelloggii Carl Epling; William Robison 1935-7-15 sn Lassen near Honey Lake 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
  JEPS55017  Ranunculus alismifolius var. alismifolius Leland S. Smith 1927-5-25 3 Lassen near Westwood Junction; Lassen Forest, Norval Flat 1747 Comment
  CHSC27739  Ranunculus alismifolius var. hartwegii J. D. Prouty 1978-7-5 17 Lassen NE shore of Mahogany L., S of Eagle L. Meadow around lake. 2060 Comment
  UC1537334  Ranunculus aquatilis var. capillaceus Gordon H. True Jr. 1936-6-21 515 Lassen Honey Lake Valley; in deeper sloughs 1219 Comment
  UC9368  Ranunculus aquatilis var. capillaceus M. S. Baker and Frank Nutting 1894-7-25 Lassen Eagle Lake 1524 Comment
  CHSC4982  Ranunculus cymbalaria R. Clicquennoi 1967-6-24 53 Lassen In meadow, 4 mi e of Eagle Lake Biological Station at Murrer's Upper Meadow. 1524 Comment
  UC773872  Ranunculus glaberrimus L. R. Short 1936-4-28 S- 338 Lassen Burgess Spring Experiment Range Lassen National Forest 1737 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
  UC1924217  Ranunculus occidentalis Debra Valov 2004-6-9 2004266 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UC1924564  Ranunculus occidentalis Debra Valov 2006-5-30 2006036 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UC506988  Ranunculus occidentalis George A. Fischer and Irwin H. Johnson 1933-7-12 213 Lassen Lassen National Forest 1722 Comment
  NY494767  Ranunculus occidentalis var. dissectus H. D. D. Ripley 1943-6-13 5682 Lassen Near Milford 1264.9 Comment
  CHSC108026  Ranunculus occidentalis var. occidentalis Lowell Ahart; John Dittes 2011-6-20 17479 Lassen Meadow, about 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  CDA24351  Ranunculus sceleratus var. multifidus D. L. Haws 1974-5-3 Lassen Railroad right-of-way near Susanville. 0 Comment
  UCD97132  Ranunculus testiculatus T. C. Fuller 1963-6-12 10666 Lassen Susanville, county fairgrounds. Comment
  UCD135418  Ratibida columnifera G. Douglas Barbe 1974-8-20 1939 Lassen north end of the Glenn-Eagle airstrip, southwest corner of Eagle Lake, 0.8 mile north of Eagle Lake Resot. Comment
  CAS-BOT-BC58196  Rhododendron columbianum Brighton C. Cain 1925-8-24 101 Lassen Mt. Lassen Vilcanic National Park, 1 mi. below Drakesbad. 1645 Comment
  CAS-BOT-BC225883  Ribes cereum B. Bartholomew; B. Anderson 1988-7-22 4503 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountains. 2080 Comment
  CHSC21360  Ribes cereum M. S. Taylor 1974-5-4 219 Lassen Scattered ca. 1/4 mi n of Eagle Lake Field Station, ca. 13 mi nw of Susanville. 1524 Comment
  UC773884  Ribes cereum L. R. Short and Wm. Gansberg 1936-6-16 S- 439 Lassen Burgess Spring Experiment Range Lassen Forest 1880 Comment
  CAS-BOT-BC186150  Ribes roezlii var. roezlii Alice Eastwood 1912-8-22 1874 Lassen Morgans [Morgan] Springs, Lassen Butte Region Comment
  CHSC23559  Ribes velutinum W. O. Baum 1971-6-21 39 Lassen E slope of Gallatin Peak along edge of fire trail. 1920 Comment
  CHSC60743  Ribes velutinum Vernon H. Oswald; Lowell Ahart 1993-6-14 5547 Lassen Eagle lake Rd. (Lassen A1) at Sandy Beach on the W shore of Eagle Lake, ca. 2.0 mi ENE of Spaulding Tract Rd. (Rd. 518, 33N89). 1566 Comment
  CHSC23568  Ribes viscosissimum W. O. Baum 1971-6-21 32 Lassen E slope on fire trail on Gallatin Peak. 1920 Comment
  SEINET10799165  Rigiopappus leptocladus Arnold J. Tiehm, Margaret J. Williams; Jan Nachlinger 1988-6-2 Tiehm 11700 Lassen South side of Shaffer Mt., 3.4 road miles north of the Wendel road on Highway 395 from Susanvile to Alturas, west of the highway. 1387 Comment
  JEPS53868  Rorippa curvisiliqua Brown and Wieslander 1922-7-30 24 Lassen Martin Springs Eagle Lake, Martin Springs Comment
  SEINET10448590  Rorippa obtusa Mary Susan Taylor 1974-7-8 Taylor 265 Lassen Ca. 1 mi N of Honey Lake, ca. 1 mi S of Standish, Honey Lake Wildlife Refuge. Comment
  JEPS95871  Rorippa sinuata Vernon H. Oswald and L. Ahart 1999-6-9 9735 Lassen Hwy. 395 northeast of Susanville and north of Smoke Creek Ranch Rd. at Mud Flat: T30N R15E Sect. 3, 4425 ft elevation, dry playa surrounded by sagebrush scrub. Small part of a perennial forming a colony on the bank between the highway and the playa. 1348 Comment
  RSA716339  Rosa californica L. Ahart, J. Dittes 2005-6-2 11944 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
  CHSC4976  Rosa woodsii subsp. ultramontana D. L. Stites 1967-6-25 58 Lassen 2 mi w of Eagle Lake Biology Station at Pelical Point. 1524 Comment
  JEPS106500  Rosa woodsii subsp. ultramontana L. P. Janeway 2004-6-26 8171 Lassen High Cascade Range. Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat; Blacks Mountain Experimental Forest 1790 Comment
  SBBG3088  Rosa woodsii subsp. ultramontana H. and M. Dearing 1939-6-6 3562 Lassen Bieber Comment
  UC75495  Rosa woodsii subsp. ultramontana Milo S. Baker 1898-1 Lassen Vicker's 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
  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
  CHSC58851  Rumex occidentalis Vernon H. Oswald; Lowell Ahart 1992-7-16 5122 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. 1719 Comment
  CAS-BOT-BC109328  Rumex paucifolius Geo. A. Fisher 1928-6-23 32 Lassen Halls Flat. 1615 Comment
  CHSC106224  Rumex paucifolius Arthur C. Barrett 1915-7-2 12 Lassen Laufman Ranger Station. 1463 Comment
  UCR67452  Rumex salicifolius George K. Helmkamp 1990-9-23 G- 14 Lassen north of Ravendale 1677 Comment
  UC1101217  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-7-29 8183 Lassen e side Tule Lake Comment
  CHSC99509  Rumex salicifolius var. triangulivalvis Lowell Ahart; John Dittes 2008-6-20 14930 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  UC748281  Rumex salicifolius var. triangulivalvis Annie M. Alexander and Louise Kellogg 1946-8-11 5153 Lassen nw end Grasshopper Valley Comment
  RSA125294  Rumex venosus Peter H. Raven, Otto Solbrig 1958-6-17 s.n. Lassen Along Hwy 395, 11.8 miles NE of Litchfied Comment
  SEINET4176394  Rumex venosus P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  UC568  Sagittaria State Geological Survey 1800-1 2189 Lassen Comment
  JEPS28698  Sagittaria cuneata George W. Gillett 1957-7-26 918 Lassen e shore Butte Lake Butte Lake; Lassen Volcanic National Park, e shore Butte Lake 1844 Comment
  CAS-BOT-BC445674  Sagittaria cuneata Clarence R. Quick 1964-8-4 64 -102 Lassen Reservoir at Long's cabin between Black's Mt. and Experimental Forest 1783 Comment
  RSA0011560  Sagittaria cuneata Robert F. Thorne, Larry E. DeBuhr 1975-8-22 46992 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line 1616 Comment
  UCD138009  Sagittaria cuneata Calvin McMillan; Malcom A. Nobs 1949-6-17 799 Lassen Grass Lake, Highway 97. Comment
  CAS-BOT-BC132713  Salix A. T. Whittemore 1979-4-21 79 -040 Lassen South shore of Eagle Lake Comment
  CHSC65007  Salix eastwoodiae Vernon H. Oswald 1991-8-5 4803 Lassen Little Willow Lake located near the south boundary of the park, ca. 2.5 miles (air) south-southeast of Drakesbad. 1844 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
  CAS-BOT-BC108057  Salix exigua John Thomas Howell; Gordon H. True 1973-8-1 50150 Lassen Gold Run Creek Road south of Susanville, Diamond Range - Sierra Nevada 1584 Comment
  SEINET3260826  Salix exigua Marcus E. Jones 1897-6-25 Lassen Susanville. 1340 Comment
  JEPS88212  Salix lasiandra var. lasiandra Vernon H. Oswald and Lowell Ahart 1996-6-17 7790 Lassen Bizz Johnson Trail accessed at Devils Corral Trailhead located off Hwy. 36 ca. 7 mi W of Susanville. Modoc Plateau 1402 Comment
  RSA746513  Salix lasiolepis K. M. Meyer, A. Townesmith 2007-7-19 138 Lassen Lassen National Forest. CA, 0.2 mi. on 29N03, off HWY 36 on pullout just past a dry creek. 1459 Comment
  CAS-BOT-BC124637  Salix lemmonii M. B. Kildale 1926-9-11 2788 Lassen Susanville 1524 Comment
  UC433175  Salix lemmonii Franklin P. Nutting 1900-7-28 Lassen Bridge Creek Comment
  NY187800  Salix lucida subsp. caudata J. T. Howell 1973-5-12 49221 Lassen Elysian Valley northwest of Janesville 1325.9 Comment
  CHSC93562  Salix lucida subsp. lasiandra Lowell Ahart; John Dittes 2005-6-2 11925 Lassen Long Valley, along a small ditch, along the road, near the Anderson Ranch home, about 4 3/4 miles (air) north of the interesection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  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
  UCR67403  Salsola gobicola George K. Helmkamp 1990-9-23 B- 16 -90 Lassen Northern Sierra Nevada Mountains, 3 mi east of Susanville, along State Road 36 1345 Comment
  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
  JEPS94499  Salvia aethiopis Vernon H. Oswald and Lowell Ahart 1997-5-27 8482 Lassen just n of Susanville (w side of Highway 139 at Lassen Community College); Lassen Community College, Highway 139 1310 Comment
  CDA40944  Salvia dorrii subsp. dorrii Vernon H. Oswald & Lowell Ahart 1998-6-4 9145 Lassen Spur road on north side of Red Rock Road, 0.6 mile east of Highway 395, south of Constantia. Comment
  CHSC60277  Sambucus mexicana P. V. Caldwell 1972-6-23 247 Lassen Irrigation ditch at headwaters of Willow Creek, Upper Murer's Meadow, on the bank. Comment
  CHSC60347  Sambucus racemosa var. microbotrys Mary Ann Showers 1992-6-13 2557 Lassen Lassen Volcanic National Park. Volcanic outcrops southwest of Widow Lake. 2072 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
  JEPS103224  Sanicula graveolens G. Schoolcraft 1992-5-1 2235 Lassen W. of Susan Hills Subd. SW. of Susanville 1341 Comment
  POM83011  Sanicula graveolens Marcus E. Jones 1897-7-2 s.n. Lassen Susanville Summit 1829 Comment
  POM161480  Sanicula tuberosa Franklin P. Nutting 1894-7-9 s.n. Lassen Pine Creek Comment
  SEINET3239994  Santalaceae R. L. Mathiasen 2010-1 1033 Lassen 0.3 km W of Fredonyer Pass on Rte. 36. 1660 Comment
  CAS-BOT-BC110337  Sarcobatus vermiculatus John Thomas Howell 1934-6-10 11897 Lassen Horse Lake. Comment
  CDA23525  Sarcobatus vermiculatus M. R. Pryor 1953-9-22 Lassen 0.5 mile west of Jack Crow s property, Stacey. 0 Comment
  NY540264  Sarcobatus vermiculatus E. K. Balls 1952-10-10 18136 Lassen 5.2 miles west of Standish, Highway 395, Susanville to Alturas 1249.7 Comment
  JEPS28664  Saxifraga odontoloma George W. Gillett 1957-7-22 6070 Lassen near campsite at s end of Snag Lake; Lassen Volcanic National Park, Snag Lake 1850 Comment
  JEPS47551  Saxifraga oregana Milo S. Baker 1894-7-9 Lassen Pine Creek Comment
  JEPS96023  Saxifraga oregana Vernon H. Oswald and Lowell Ahart 1996-6-24 7889 Lassen 0.5 mi e of Eagle Lake Road ((A1) and 2.5 mi s of Eagle Lake, Papoose Meadows, Modoc Plateau, Montane Meadow); Papoose Meadows, Modoc Plateau, Montane Meadow 1633 Comment
  CAS-BOT-BC283611  Schedonorus pratensis John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49466 Lassen Elysian Valley, W of Janesville 1325 Comment
  CAS-BOT-BC111215  Scirpus John Thomas Howell 1976-7-19 51967 Lassen Transition forest on Gold Run Creek southwest of Susanville 1386 Comment
  JEPS95894  Scirpus nevadensis Lowell Ahart 1999-9-13 8228 Lassen on the south side of Mapes Road; about 200 yards east of Lambert Lane; about 3 1/2 miles (air) southeast of Standish 1210 Comment
  SACT002079  Scribneria bolanderi Malcolm Nobs, Galen Smith 1949-5-29 Lassen Vernal meadowland. Marsh, on Great Northern Railroad, Highway 299, Nubeiber. Comment
  JEPS11413  Scrophularia desertorum R. F. Hoover 1940-9-28 4632 Lassen Susanville Comment
  JEPS29096  Scrophularia lanceolata Lauramay T. Dempster 1961-6-17 1674 Lassen ca 4 mi n of Karlo Rd junction with Hwy 395 1432 Comment
  CAS-BOT-BC214269  Scutellaria nana John Thomas Howell 1934-6-10 11879 Lassen 12 miles n. of Susanville on road to Horse Lake Comment
  SBBG125002  Scutellaria nana C. B. Hardham -Jun-2000 Lassen Gold Run Crk, S of Susanville Comment
  UC1037195  Scutellaria nana Leo Whitney 1934-7-10 1513 Lassen 14 mi w of Eagle Lake (near Harvey Valley); Lassen National Forest 1737 Comment
  UC1609093  Scutellaria nana Vernon H. Oswald and Lowell Ahart 1993-7-8 5653 Lassen on se edge of Poison Lake (Pittville Rd. (Lassen 111, 36N01) 1.9 mi n of Hwy 44) 1709 Comment
  UC790980  Secale cereale A. A. Beetle 1941-6-28 2811 Lassen 6 mi s of Ravendale (Observation Peak); Observation Peak Comment
  UC1137766  Senecio aronicoides August L. Hormay 1934-5-15 Lassen 1.50 mi e Halls Flat; Lassen National Forest 1767 Comment
  UC1143033  Senecio aronicoides L. R. Short 1936-6-2 S- 355 Lassen Burgess Spring Experimental Range Lassen National Forest 1865 Comment
  RSA0012768  Senecio aronicoides A. A. Heller 1938-6-4 15143 Lassen West of Fredonyer Pass on Highway 36. 1677 Comment
  SEINET10801294  Senecio aronicoides Katherine L. Morris, David B. Dunn; Melvin L. Conrad 1973-5-25 Morris 230 Lassen Collected 7.6 mi. NW of Jct. of Hwy. 36 & 44 on Hwy. 44, in an area of yellow pine and incense cedar; very moist area. Comment
  CHSC106074  Senecio canus Lowell Ahart; John Dittes 2010-7-31 16990 Lassen About 2,300 feet north of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1510 Comment
  CHSC23475  Senecio clarkianus Wayne O. Baum 1971-7-14 71 -61 Lassen N. slope of Gallatin Peak. 2011 Comment
  UC831836  Senecio hydrophiloides A. A. Heller 1938-6-23 15192 Lassen about 3 mi s Westwood Comment
  CHSC58836  Senecio hydrophilus Vernon H. Oswald; Lowell Ahart 1992-7-16 5128 Lassen Feather Lake on the S side of Bridge Creek Spring Rd. (County Rd. 112, Forest Rd. 31N06), ca. 0.4 mi E of Champs Flat Rd. (County Rd. 105, Forest Rd. 32N02), between Old Station and Susanville. On the margin of the lake. 1749 Comment
  HSC42542  Senecio hydrophilus Barbara Kelly 1977-8-9 564 Lassen 15 miles east of Madeline on a dirt road from Adin Comment
  UC1063253  Senecio integerrimus var. exaltatus A. Simontacchi 1940-5-15 712 Lassen 10.2 mi e Coyote Spring; Lassen National Forest, Halls Flat Quad. 1699 Comment
  UC1924243  Senecio integerrimus var. exaltatus Debra Valov 2004-6-8 2004241 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  RSA0124971  Senecio integerrimus var. exaltatus E. K. Balls 1950-5-19 14776 Lassen By E. end Maul Reservoir, on rd. from Adin to Madeline. 1524 Comment
  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
  UCR71483  Senecio triangularis Barbara Ertter 1988-7-25 7870 Lassen Northern Sierra Nevada Mtns, ridge of Diamond Mtns, c. 1.5 mi. east of Diamond Peak, c. 10 air mi due south of Susanville. 2256 Comment
  CDA2461  Setaria verticillata Willis Wheeler Oct 1930 Lassen 0 Comment
  SD8445  Sibbaldia procumbens Mrs. R. M. Austin 1882-8-7 Lassen King's Valley Comment
  UC1121981  Sidalcea asprella subsp. nana A. Simontacchi 1940-6-3 793 Lassen 8.2 mi se Alcohol Jacks Cabin; Lassen National Forest, Halls Flat Quad. 1706 Comment
  UC1924263  Sidalcea glaucescens Debra Valov 2004-5-31 2004225 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  CAS-BOT-BC205780  Sidalcea oregana David D. Keck; J. Clausen 1935-6-24 3740 Lassen 2 mi. S. of Ravendale 1464 Comment
  CHSC30043  Sidalcea oregana Cindy Prouty 1978-7-27 7 Lassen Little Antelope Valley, W of Eagle L. 1792 Comment
  SEINET11986397  Sidalcea oregana N. E. Heiken 1978-1 86 Lassen Colman Lake, several mi S of Eagle Lake 1963 Comment
  SCFS927  Sidalcea oregana subsp. spicata L. Loeblich 1964-7-1 72 Lassen Along Hwy 299 going W, 0.5 mi W of jct of A-2 and Hwy 139 1250 Comment
  NY54618  Sidalcea oregana var. maxima N. H. Holmgren 1980-7-3 9479 Lassen Madeline Plains, Westside Road, 9 km (5.6 mi) west of U.S. highway 395, 16 km (10 mi) airline distance northwest of Termo 1620 Comment
  SBBG71651  Silene bernardina S. W. Hutchinson -Jun-1925 72 Lassen near Eagle Lake 1554 Comment
  CAS-BOT-BC389493  Silene menziesii H. D. Ripley; R. C. Barneby 1943-6-14 5751 Lassen Mesa W. of Susanville 1310 Comment
  HSC103769  Silene menziesii M. R. Mesler, Carol Wilson 2013-7-16 1626 Lassen Forest service road 31N25 on north edge of impoundment on Pine Creek 1930 Comment
  JEPS87996  Silene nuda Barbara Ertter 1988-7-25 7867 Lassen ca 1.5 mi e Diamond Peak (ca 10 airmi due s of Susanville, ridge of Diamond Mts.); ridge of Diamond Mts., e of Diamond Peak 2255 Comment
  CAS-BOT-BC389543  Silene nuda H. D. Ripley; R. C. Barneby 1943-6-13 5686 Lassen Milford 1264 Comment
  CHSC116070  Sisymbrium altissimum Lowell Ahart; John Dittes 2015-7-13 20316 -A Lassen About 100 yards southwest of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC5235  Sisymbrium altissimum L. Harman 1946-6-26 Lassen Webb's, Eagle Lake. 1584 Comment
  JEPS107467  Sisymbrium altissimum Lowell Ahart, John Dittes 2005-6-1 11850 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1448 Comment
  UC1126792  Sisymbrium altissimum E. Sawyer 1935-6-27 224 Lassen Long Valley 1310 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
  UCD115496  Sisymbrium altissimum P. B. Kennedy 1927-9-1 s.n. Lassen Janesville. Comment
  UCD138789  Sisyrinchium bellum Gerald Dickinson 1963-7-2 71 Lassen east of Willow Creek campground, south of Hayden Hill, State Highway 139. 1219 Comment
  CHSC59081  Solidago elongata Vernon H. Oswald; Lowell Ahart 1992-8-25 5177 Lassen Lassen Volcanic National Park. Cameron Meadow between Juniper and Snag Lakes. Edge of meadow. 1950 Comment
  JEPS124384  Sonchus asper subsp. asper Lowell Ahart, John Dittes 2015-7-13 20304 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC96734  Sparganium emersum subsp. emersum Gordon Leppig 1998-8-17 1052 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CAS-BOT-BC390560  Spergularia rubra John Thomas Howell; Gordon H. True 1973-8-1 50245 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2133 Comment
  CAS-BOT-BC149629  Spiraea douglasii Carl B. Wolf 1929-9-1 3779 Lassen Mt. Lassen National Park between Grassy and Snag Lakes 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
  UC1037224  Spiraea douglasii Leo Whitney 1934-7-2 1592 Lassen ca 14 mi w Eagle Lake (Harvey Valley Spring); Lassen National Forest, Harvey Valley 1737 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
  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-BC311783  Stanleya viridiflora Louella Bass 1982-7-25 10 -82 Lassen Near Karlo, about 12 miles north of Litchfield 1356 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
  SEINET5337330  Stellaria longipes C. G. Gulling 1905-1 1551 Lassen Big Meadows Comment
  CHSC4785  Stellaria longipes var. longipes R. Carter 1967-6-29 574 Lassen In Murrer's Meadow, 100 yds. SE of dam. Comment
  CHSC93702  Stellaria longipes var. longipes Lowell Ahart; John Dittes 2005-6-2 11992 Lassen Along a small wash, west side of a poor dirt road, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1427 Comment
  CHSC99292  Stellaria longipes var. longipes Lowell Ahart; John Dittes 2008-6-20 14956 Lassen About 200 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC92676  Stenotus acaulis L. P. Janeway; B. Castro 2005-7-10 8487 Lassen Northern High Sierra Nevada. Crest of Diamond Mountains over-looking the northwest end of Honey Lake, more or less at the north end of Stony Ridge. Northeast edge of low flat ridge. 1993 Comment
  JEPS89748  Stenotus lanuginosus var. lanuginosus Dean Wm. Taylor with Glenn L. Clifton 1992-5-7 12545 Lassen ca. 0.4 mi. from Hwy. 139 on rd. to Smith Flat (Willow Creek drainage); Modoc Plateau, Land Reservoir 7 1/2 Quad. 1990 ed., Willow C 1524 Comment
  SEINET11262513  Stephanomeria lactucina Robert L. Johnson, Mikel R. Stevens 2015-7-10 3939 Lassen Southern Cascade Range. North side of Westwood 0.3 rd mi west of jct with Mooney Rd on CA-36. N side of rd.; 0 1563 Comment
  UC1037278  Stephanomeria lactucina Leo Whitney 1934-7-22 1747 Lassen 6 mi w Eagle Lake, lower end (near Antelope Mountain); Lassen National Forest 1889 Comment
  CAS-BOT-BC375596  Stephanomeria lactucina Alice Eastwood 1912-8-22 s.n. Lassen Trail from Morgans Springs to Lassen Butte Region Comment
  CAS-BOT-BC322925  Stephanomeria tenuifolia Clarence R. Quick 1964-8-5 64 -95 Lassen Cal Mt. east of Poison Lake 1767 Comment
  HSC22876  Stipa hymenoides John Pratt 1970-6-14 15 Lassen East of Janesville 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
  UC1184065  Streptanthus tortuosus var. orbiculatus Jean Langenheim 1957-6-26 4381 Lassen from area adjacent to 1937 chaparral quadrat (ne part of Lassen Co.); Northwest Said Valley Comment
  UC7240  Suaeda moquinii J. Burtt Davy Jun 17 1897-Jun 24 1897 3325 Lassen Honey Lake Valley 1828 Comment
  CHSC110305  Suaeda nigra L. P. Janeway; B. Castro 2012-7-2 10925 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake; 0.6 km west of Wendel Road, 4.8 air km southeast of Wendel. 1221 Comment
  UC1123453  Swertia albicaulis var. albicaulis Robert W. Gardner 1937-6-16 G- 13 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UC1120025  Symphoricarpos mollis A. Simontacchi 1940-6-24 890 Lassen 6.4 mi sw Jacks Lake; Lassen National Forest, Halls Flat Quad. 1950 Comment
  SEINET1906280  Symphyotrichum ascendens Barbara Ertter 1987-1 7299 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road; 1524 Comment
  UC1192207  Symphyotrichum ascendens Verne Grant and Irving Schneider 1947-9-6 8391 Lassen near, (w of Fleming Ranch Headquarters) Wendel Comment
  JEPS95906  Symphyotrichum ascendens Lowell Ahart and Vernon H. Oswald 1999-9-13 8230 Lassen along S side of dirt road, Willow Creek is on the S side of the road, about 250 yds. E of the sign in station along Hwy 139, Willow Creek Wildlife Area 1463 Comment
  HSC103616  Symphyotrichum bracteolatum Thomas W. Nelson, Jane Nelson 1985-8-10 8007 Lassen Along north side of Silver Lake 1829 Comment
  SFV7757  Symphyotrichum spathulatum T. Gordon, K. Kimbrough 1975-8-15 1211 Lassen 16 miles south of Adin. 1402 Comment
  CHSC84880  Symphyotrichum spathulatum var. yosemitanum Samantha Mackey Hillaire; Linnea Hanson, Catie Bishop 2003-9-21 356 Lassen Lassen Volcanic National Park. Snag Lake; mudflat just N of an open stand of willows on the south shore of the lake; just east of where Grassy Creek flows into the lake. [Label says 'area near' latitude and longitude]. 1900 Comment
  CHSC71103  Tamarix parviflora Vernon H Oswald; Lowell Ahart 1998-5-22 9096 Lassen Hwy 395 at an intermittent drainage crossing the road 2.3 mi south of Milford. 1255 Comment
  JEPS94483  Taraxia subacaulis Vernon H. Oswald and Lowell Ahart 1997-5-27 8521 Lassen 3.6 mi ne of Highway 139 (small impoundment on Coyote Flat Draw crossing Forest Route 38N04 between Highway 139 near Willow Creek Guard Station and Coyote Flat); Coyote Flat Draw crossing Forest Route 38N04 1731 Comment
  CHSC112988  Taraxia tanacetifolia Lowell Ahart; John Dittes 2013-7-23 18885 Lassen About 150 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC4967  Taraxia tanacetifolia R. Carter 1967-6-23 547 Lassen In upper part of Murrer's Meadow. 1584 Comment
  JEPS31730  Taraxia tanacetifolia W. L. Jepson 1918-8-15 7998 Lassen Grasshopper Valley 1615 Comment
  SJSU10922  Taraxia tanacetifolia J. W. Tilden 1958-6-27 1296 Lassen Madeline Comment
  CAS-BOT-BC329045  Tetradymia canescens Elmer I. Applegate 1897-6-4 851 Lassen Madeline Plains Comment
  CHSC93242  Tetradymia canescens John Dittes; Scott Chamberlain 2004-6-28 1007 Lassen Modoc Plateau; Long Valley; ca. 1.8 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 1.0 air-mile east of Plumas County line. 1460 Comment
  RSA783307  Tetradymia canescens R. R. Halse 2010-8-26 8090 Lassen Along State Hwy 70 at Beckwourth Pass ca. 4.3 miles west of its jun