Search Results — 2000 specimen records retrieved (1626 records with coordinates)
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 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/consortium/).
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? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CDA19039  Abies concolor Mark Lubinski 2000-10-12 PDR 070105 Lassen Sierra Nevada; 1 mi W on State Route 44 and 36. 0 Comment
  UCR64818  Abies concolor Frank C. Vasek 1976-9-3 760903- 02 Lassen 5 mi west of Susanville, north of State Hwy 44 at a point 0.25 mi north of junction with State Hwy 36 Comment
  CHSC13794  Abies magnifica Cathy Crittenden 1970-7-9 39 Lassen 2 1/2 miles east of Antelope Mtn. lookout on road to Eagle Lake Resort. 1981 Comment
  CAS-BOT-BC260403  Achnatherum hymenoides P. Monnet 1913-7-1 799 Lassen Hot Springs Peak 1828 Comment
  UC1024816  Achnatherum lemmonii Leo Whitney 1935-6-19 3263 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UC1137759  Achnatherum lemmonii August L. Hormay 1934-5-15 Lassen e Eldrige's; Lassen National Forest 1524 Comment
  RSA129475  Achnatherum lemmonii var. lemmonii G. A. Fischer 1933-7-14 252 Lassen Lassen Forest 1768 Comment
  CAS-BOT-BC210742  Achnatherum nelsonii John Thomas Howell 1976-7-20 52026 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  UCD50843  Achnatherum nevadense B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  CAS-BOT-BC216456  Achnatherum occidentale subsp. californicum Clare B. Hardham 1971-8-22 18413 Lassen Diamond Mountain 2346 Comment
  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
  UC1133069  Achnatherum occidentale subsp. occidentale K. E. Bradshaw 1939-5-27 231 Lassen Black Mt. Experimental Forest - Plot 39-1, s end Lassen National Forest, Halls Flat Quadrangle Comment
  UC717977  Achnatherum occidentale subsp. occidentale David D. Keck 1944-7-8 5451 Lassen 1.5 mi w Susanville (rim of plateau overlooking Susan River canyon); Sierra Nevada, Susan River 1341 Comment
  CAS-BOT-BC218612  Achnatherum occidentale subsp. pubescens John Thomas Howell 1955-7-19 30821 Lassen East side of Beckwourth Pass, Sierra Nevada 1493 Comment
  UCD32665  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2064 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  UCD32666  Achnatherum occidentale subsp. pubescens Beecher Crampton 1954-7-5 2066 Lassen Lassen County, 5.5 miles west of Susanville, along highway 36. 1447 Comment
  UCD51169  Achnatherum occidentale subsp. pubescens A. L. Hormay 1934-6-30 s.n. Lassen on Harvey Mountain, Lassen National Forest. 2133 Comment
  SEINET201660 Image available Achnatherum speciosum A. Cronquist, AH Holmgren 1992-6-17 8467 Lassen 50 mi SE of Susanville 1372 Comment
  CAS-BOT-BC218007  Achnatherum thurberianum J. A. Jenkins 1937-7-15 2355 Lassen SW slope Big Valley Mountain along highway from McArthur to Bieber 1127 Comment
  UC1031349  Achnatherum thurberianum Leo Whitney 1935-6-18 3267 Lassen 13 mi w Eagle Lake; Lassen National Forest, Ashurst Mountain 1584 Comment
  UCD34873  Achnatherum thurberianum Beecher Crampton 1964-6-27 7095 Lassen Lassen County, ca. 5 miles S.W. of Ravendale, BLM land. Comment
  UCD51425  Achnatherum thurberianum Beecher Crampton 1954-7-5 2052 Lassen Along Hwy 36, 4.5 miles west of Susanville. 1432 Comment
  UCD51444  Achnatherum thurberianum R. Tofsrud 1947-7-1 223 Lassen Between Ravendale and Thermos. Comment
  CAS-BOT-BC217992  Achnatherum webberi Clare B. Hardham 1969-8-28 17430 Lassen Slope W of Janesville Comment
  UC579786  Achnatherum webberi David D. Keck and J. Clausen 1935-6-24 3749 Lassen 2 mi s, on borders of an alkali mud flat Ravendale 1465 Comment
  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
  CAS-BOT-BC391609  Actaea rubra John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49411 Lassen Elysian Valley, west of Janesville 1325 Comment
  CDA3517  Adonis aestivalis T. C. Fuller 1963-6-1 10641 Lassen East of Willow Springs Campground, in northeast Lassen Co., ca 15 miles southeast of Pittville. 0 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
  JEPS87414  Agastache parvifolia Vernon H. Oswald and Lowell Ahart 1993-6-28 5619 Lassen e Poison Lake (n of Hwy 44 along Rd 33N47 at the ne end of Little Harvey Valley, between Champs Flat and Harvey Valley, bordering Pine Creek); ne end of Little Harvey Valley, Pine Creek 1737 Comment
  POM147886  Agastache urticifolia J. B. Feudge 1927-7-20 1754 Lassen Westwood Comment
  CAS-BOT-BC30238  Ageratina occidentalis George Wilson Gillett 1957-7-26 904 Lassen Butte lake, point of rocks west of outlet and above trail 1844 Comment
  CAS-BOT-BC383105  Ageratina occidentalis Andrew Townesmith; Karen M. Meyer 2007-7-20 836 Lassen Lassen National Forest, Eagle Lake Ranger District. Along Forest Service road 30N03, 0.5 mile from intersection with state route 36, at roadblock where two decrepit bridges cross Susanville River 1429 Comment
  POM1922B  Ageratina occidentalis Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  RSA715617  Agoseris glauca var. dasycephala L. Ahart, John Dittes 2005-6-1 11851 Lassen On the east side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 air miles northwest of the intersection of Scott Road and Highway 70, 3.9 air miles northwest of Hallelujah Junction. 1449 Comment
  CHSC64836  Agoseris glauca var. glauca Vernon H. Oswald 1995-6-26 6944 Lassen Modoc Plateau. Spooner Rd. ca. 0.3-0.4 mi E of its junction with Ash Valley Rd. (Lassen 527) in Ash Valley. 1542 Comment
  CHSC71219  Agoseris glauca var. laciniata Vernon H. Oswald; Lowell Ahart 1998-6-4 9142 Lassen Spur road on north side of Red Rock Rd. 0.6 mi east of Hwy. 395, south of Constantia. 1389 Comment
  JEPS103193  Agoseris grandiflora G. Schoolcraft 2000-6-19 2904 Lassen West of Cold Spring Valley 1706 Comment
  CAS-BOT-BC433230  Agoseris heterophylla K. L. Chambers; Peter G. Dorris 1963-5-11 s.n. Lassen Red Rock Road, just east of Hwy. 395 (and just w. of Nevada State Line), ca. 10 mi. n. of Hwy. 70 junction, and s. of Constantia. Comment
  CAS-BOT-BC13231  Agoseris monticola G. D. Hanna 1958-9-22 s.n. Lassen Road from Caribou Lake to Cone Lake Comment
  UC773915  Agoseris retrorsa L. R. Short and W. McNulty 1936-6-15 S- 436 Lassen Burgess Spring Exp. Range 1848 Comment
  UCD55280  Agoseris retrorsa Ellen Dean 2006-5-15 3095 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
  SEINET10509717  Agropyron desertorum Douglas G. LeDoux, David B. Dunn 1973-5-24 LeDoux 859 Lassen Collected at jct of hwy 70 & 395 at arco station. Comment
  SEINET13680062  Agropyron desertorum J. R. Reeder, C. G. Reeder 1981-5-20 7350 Lassen 3.5 km NNW of Janesville. above Long Valley 1250 Comment
  SEINET7297772 Image available Agrositanion John Thomas Howell 1976-1 52002 Lassen Open juniper-Jeffrey pine woodland on basaltic rock, about 5 miles west of Fredonyer Pass near confluecne of Susan River and Willard Creek. 1433 Comment
  HSC8791  Agrostis exarata D. E. Anderson 1963-8-25 2803 Lassen 3 mi. E of Cromberg 1372 Comment
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Apr 25 2013
  HSC95151  Agrostis exarata Gordon Leppig 1998-7-12 955 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  POM313172  Agrostis exarata Malcolm A. Nobs, S. Galen Smith 1949-7-21 1057 Lassen Lassen County: Shallow marshy stream from springs, 4 miles N of Madeline Comment
  CAS-BOT-BC139677  Agrostis gigantea John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49485 Lassen Sierra Nevada. Elysian Valley, west of Janesville. 1325 Comment
  UC1024638  Agrostis pallens Leo Whitney 1934-7-10 2225 Lassen meadow near Harvey Spring (ca 14 mi w of Eagle Lake); Lassen National Forest, Harvey Valley 1737 Comment
  CAS-BOT-BC138802  Agrostis scabra John Thomas Howell 1973-7-10 49768 Lassen Sierra Nevada. Near Westwood. 1554 Comment
  UC1137058  Agrostis scabra August L. Hormay 1932-7-20 Lassen Bogard Ranger Station Lassen National Forest Comment
  SEINET10510581  Agrostis scabra R. Ondricek 1978-8-4 Ondricek 114 Lassen Near edge of Eagle Lake along grassy shoreline. T32N, R11E, se tip of Sec. 19, Antelope Mtn. Quadrangle, 1554 Comment
  CAS-BOT-BC138622  Agrostis stolonifera H. S. Yates 1936-8-11 6069 Lassen Baxter Creek. 1280 Comment
  RSA119134  Alisma plantago-aquatica Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  JEPS127168  Alisma triviale Lowell Ahart, John Dittes 2016-7-15 21221 Lassen Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  CHSC5928  Allium acuminatum R. Gein 1946-6-17 Lassen Horse Lake near Mt. Fredonyer. 1554 Comment
  CHSC7663  Allium anceps Beverley J. Wise 1969-5-4 140 Lassen 23.4 mi. east of Susanville on Hwy 395. 1615 Comment
  SEINET10532611  Allium anceps Paul Gallian, David B. Dunn 1971-6-2 Gallian 516 Lassen 6 miles n of hallelujah jct. On u.s. Hwy. 395, In artemisia tridentata, pinyon Pine along high ridge and in sandy wash 1402 Comment
  SEINET3883805  Allium anceps D. W. McNeal 1978-5-30 2127 Lassen Beside Highway 395, 3.0 miles south of Ravendale.; 0 Comment
  RSA487942  Allium atrorubens var. atrorubens A. Tiehm, J. Nachlinger 1988-6-2 11702 Lassen South side of Shaffer Mountain, 3.4 miles north of the Wendel road on Hwy 395 from Susanville to Alturas, west of the highway. 1387 Comment
  CAS-BOT-BC459452  Allium bisceptrum David D. Keck; J. Clausen 1935-6-25 3767 Lassen 2 miles W of Westwood on road to Chester at county line. Comment
  CHSC27661  Allium campanulatum Robert A. Schlising 1978-7-1 3302 Lassen S of Eagle Lake at E side of Mahogany Lake. 2060 Comment
  HSC84127  Allium lemmonii Dale McNeal 1983-6-5 2840 Lassen Beside Eagle Lake Rd., 0.5 mi. N of Hwy. 36 Comment
  CAS-BOT-BC171315  Alnus incana subsp. tenuifolia John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49461 Lassen Elysian Valley, W of Janesville. Sierra Nevada 1325 Comment
  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
  CHSC108017  Alopecurus geniculatus Lowell Ahart; John Dittes 2011-6-20 17504 Lassen In the small stream, about 80 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UCD55895  Alopecurus geniculatus A. A. Beetle; G. L. Stebbins Jr. 1942-5-29 3371 Lassen 9.5 miles E of Bieber, Big Valley. Comment
  CHSC63387  Alyssum desertorum Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6310 Lassen Blue Door Flat on Clarks Valley Rd. (Lassen 510) ca. 7 mi E of Madeline. On the edge of the road. 1767 Comment
  CHSC64769  Alyssum minus subsp. micranthum Vernon H. Oswald 1995-5-31 6804 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1371 Comment
  JEPS93815  Alyssum simplex Vernon H. Oswald and Lowell Ahart 1998-6-4 9144 Lassen s of Constantia (at parking area at end of spur road on n side of Red Rock Road 0.6 mi e of Highway 395); Red Rock Road 1389 Comment
  JEPS121243  Amaranthus californicus Lowell Ahart, John Dittes 2013-7-22 18860 Lassen 50 yards W of the road levee, about 250 yards S of the four tall poles, Ash Creek Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. 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
  RSA719708  Ambrosia acanthicarpa Michael A. Vincent, K. Levings 2006-7-29 12920 Lassen Along Rt 395, 46.9 road miles SE of Johnstonville, 13.9 miles N of Sierra County line. 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
  SBBG14885  Amelanchier utahensis A. I. Richardson 1961-5-30 8 Lassen S of Eagle Lake 1402 Comment
  CAS-BOT-BC142538  Amelanchier utahensis Philip A. Munz 1947-5-20 11886 Lassen Laufman Forestry Public Camp Ground, above Milford 1524 Comment
  CHSC60784  Amphiscirpus nevadensis Vernon H. Oswald; Lowell Ahart 1993-6-14 5521 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). Shallow depressions among low dunes on the upper beach between the road and the lake. 1566 Comment
  CAS-BOT-BC222256  Amsinckia John Thomas Howell 1934-6-10 11899 Lassen 5 miles n. of Horse Lake on road to Alturas Comment
  POM71504  Amsinckia intermedia Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  HSC97154  Amsinckia menziesii L. Ahart, John Dittes 2005-6-1 11899 Lassen N side of Scott Rd., E of the railroad underpass, Long Valley, about 4.75 mi. N of the intersection of Scott Rd. and Hwy. 70, 6.2 mi. NW of Hallelujah Jct. 1460 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
  UCD119818  Amsinckia tessellata John Thomas Howell 1934-6-10 11842 Lassen Near Plumas Junction. Comment
  CHSC64764  Amsinckia tessellata var. tessellata Vernon H. Oswald 1995-5-24 6761 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 3.3 mi e of Amedee Rd. at Wendel. 1280 Comment
  UC198379  Amsinckia tessellata var. tessellata J. G. Lemmon Lassen Sierra and Long Valleys Comment
  UC585123  Amsinckia tessellata var. tessellata E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1747 Lassen e facing slope of gully on mountain above Red Rock 1432 Comment
  UCD159579  Anaphalis margaritacea D. S. Park 2011-8-24 316 Lassen East of Westwood. Near Goodrich Creek. 319 Comment
  CHSC117217  Ancistrocarphus filagineus Lowell Ahart; John Dittes 2016-6-7 21000 Lassen Near Stonebreaker Road, 0.7 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC27616  Ancistrocarphus filagineus Robert A. Schlising 1978-6-8 3287 Lassen E of Eagle Lake and N of Murrers Upper Meadow. 1536 Comment
  CHSC12433  Antennaria Robert Severin 1969-6-26 22 Lassen Papoose Meadow, 4 mi s of E.L.B.S.; 1/4 mi n of Cow Camp. 1630 Comment
  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-BC58689  Antennaria argentea subsp. aberrans Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  CAS-BOT-BC59216  Antennaria dimorpha John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49200 Lassen Elysian Valley northwest of Janesville 1325 Comment
  CAS-BOT-BC59220  Antennaria dimorpha James Jokerst 1983-5-31 1792 Lassen Grasshopper Valley Quad. Near Madeline Plains 1583 Comment
  CHSC71069  Antennaria dimorpha Vernon H. Oswald; Lowell Ahart 1998-5-22 9088 Lassen Hwy. 36 between Fredonyer Summit and Susanville, 0.4 mi west of the Susan River and Bizz Johnston Trail. 1417 Comment
  HSC69050  Antennaria dimorpha Gary Schoolcraft 1980-4-8 203 Lassen On east side of Schaffer Mtn. about 1/2 mile west of Hwy. 395 1463 Comment
  CAS-BOT-BC69137  Antennaria geyeri John Thomas Howell 1934-7-9 12520 Lassen Pine Creek Flat Comment
  CHSC60809  Antennaria geyeri Vernon H. Oswald; Lowell Ahart 1993-6-28 5614 .1 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
  CHSC92677  Antennaria geyeri L. P. Janeway; B. Castro 2005-7-10 8478 Lassen Northern High Sierra Nevada. Crest of the Diamond Mountains overlooking Janesville and the north end of Honey Lake; 0.2 km north of 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
  UC485653  Antennaria geyeri T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  UC88216  Antennaria geyeri T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  CAS-BOT-BC58691  Antennaria luzuloides John Thomas Howell 1934-7-6 12443 Lassen Harvey Valley Comment
  UC380912  Antennaria luzuloides Marcus E. Jones, A. M. 1897-6-18 Lassen Chat 1524 Comment
  CHSC89758  Antennaria luzuloides subsp. aberrans L. P. Janeway 2004-6-26 8167 Lassen High Cascade Range. 0.6 km east-southeast of Patterson Flat along Road 33N71; Blacks Mountain Experimental Forest. 1785 Comment
  CHSC101038  Antennaria luzuloides subsp. luzuloides John Dittes 2008-5-22 1531 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 outcrop on northeast side of Willow Creek. 484 Comment
  CAS-BOT-BC26645  Antennaria pyramidata Marcus E. Jones 1897-6-18 s.n. Lassen Chat 1524 Comment
  POM39272  Antennaria rosea Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1583976  Antennaria rosea G. Schoolcraft 1990-7-2 2103 Lassen w of Cold Spring Mtn. 1645 Comment
  JEPS94555  Antennaria rosea subsp. confinis Vernon Oswald and Lowell Ahart 1997-6-24 8647 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
  JEPS114859  Apera interrupta Lowell Ahart, John Dittes 2008-6-19 14868 Lassen About 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  JEPS127243  Apera interrupta Lowell Ahart, John Dittes 2016-7-13 21143 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
  UC1123490  Apocynum androsaemifolium A. Simontacchi 1940-8-5 930 Lassen 4.2 mi. w. Harvey Mt. Lookout; Lassen Nat'l Forest, Halls Flat Quad. Comment
  CHSC75442  Apocynum cannabinum Vernon H. Oswald; Lowell Ahart 1999-6-9 9739 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 0.4 mi west of Hwy. 395. 1356 Comment
  CHSC1430  Aquilegia formosa K. Chew 1954-7-9 Lassen Along Pine Creek just below Stephens meadow. 1828 Comment
  CHSC30594  Aquilegia formosa Marc Held 1972-7-7 41 Lassen Collected on the roadside above Gallatin Beach. Comment
  RSA122701  Aquilegia formosa L. R. Short 1936-6-26 72751 Lassen Burgess Spring, Exp Range. 1838 Comment
  SEINET10539684  Arabis Paul Gallian, David B. Dunn 1971-6-2 Gallian 496 Lassen Approx 22 mi s of adin on state hwy 139; in basalt. Assoc: juniper, artemisia. 1646 Comment
  SEINET228463  Arabis holboellii var. pinetorum Reed C. Rollins, Kathryn W. Rollins 1981-5-31 81176 Lassen Just north of Eagle Lake. Comment
  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
  RSA0129096  Arabis oligantha Franklin P. Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  POM316895  Arabis rectissima Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  JEPS28468  Arabis rectissima var. rectissima George W. Gillett 1957-9-4 1123 Lassen about 1/8 mi below Widow Lake (Widow Lake Trail); Lassen Volcanic National Park 2011 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
  SD64322  Arctium minus Darley F. Howe 1966-8-24 Lassen 32 miles northeast of Litchfield on Hwy #395. 1399 Comment
  SDSU6214  Arctium minus D. F. Howe 1966-8-24 4297 Lassen 32 miles northeast of Litchfield on #395. 1402 Comment
  CAS-BOT-BC45910  Arctostaphylos nevadensis Hans Leschke 1957-7-12 s.n Lassen Above Cold Boiling Lake 2316 Comment
  HSC7705  Arctostaphylos patula L. H. Myers 1963-4-14 39 Lassen Janesville grade road, ca. 3 mi. S of Janesville Comment
  SEINET530728  Arenaria congesta var. lithophila Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  SEINET530729  Arenaria congesta var. lithophila Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  UC465891  Arenaria congesta var. subcongesta Franklin P. Nutting Lassen Dixey Valley Comment
  UC852268  Arenaria congesta var. subcongesta A. A. Heller 1938-6-23 15198 Lassen e Fredonyer Pss 1645 Comment
  JEPS124518 Image available Argemone munita Himayat H. Naqvi 1965-7-12 144 Lassen 2.6 miles from Milford, highway 139 Comment
  CHSC30585  Argemone munita subsp. argentea P. V. Caldwell 1972-6-24 253 Lassen Sandy beach area between the tunnel and E.L.B.S., off the roadside. 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
  RSA152609  Argemone munita subsp. rotundata I. L. Wiggins, Dorothy B. Wiggins 1961-6-11 16352 Lassen 4.5 mi. e of Susanville Comment
  CHSC27596  Arnica chamissonis George Deniso 1978-7-21 96 Lassen E end of Mahogany Lake - SE of Eagle L. 2060 Comment
  CHSC66713  Arnica chamissonis Vernon H. Oswald; Lowell Ahart 1996-8-1 8109 Lassen Mountain Meadows Reservoir SW of Westwood. 1539 Comment
  JEPS19757  Arnica chamissonis Rimo Bacigalupi with S. Galen Smith 1957-6-28 6005 Lassen 6.1 mi s of Madeline Comment
  JEPS88428  Arnica chamissonis Vernon H. Oswald and Lowell Ahart 1996-8-1 8109 Lassen sw Westwood (shore of reservoir ne of Indian Ole Dam); Mountain Meadows Reservoir 1539 Comment
  UC91141  Arnica chamissonis unknown 1892-7-1 Lassen Susanville Comment
  SBBG128899  Arnica chamissonis L. Ahart,J. Dittes 2008-6-20 14902 Lassen ca. 150 yards SW of where the levee rd crosses Big Valley Canal, in Big Valley, ca. 4 mi (air) NE of the Headquarters at Ash Crk State Wildlife Area, ca. 7 mi (air) NE of Bieber 1263 Comment
  JEPS22841  Arnica cordifolia A. A. Heller 1938-6-4 15146 Lassen 1 mi e Fredonyer Pass 1706 Comment
  JEPS118456  Arnica cordifolia var. cordifolia Lowell Ahart, John Dittes 2011-6-20 17484 Lassen Forest floor, about 50 yards east of the stream, about 100 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
  OBI76962  Arnica dealbata Anthony Baniaga 2011-8-4 489 Lassen Lassen Natl Forest. About 1/2 mi WNW of Griffith Hill along 30N21. Swain Mtn quad. T30N R8E sec 5 SW of SW 1918 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
  CHSC12429  Arnica nevadensis Robert W. Severin 1969-6-21 10 Lassen 2 mi SSE E.L.B.S. between Five Points turnoffs. 1584 Comment
  CHSC77183  Arnica parryi subsp. sonnei G. Schoolcraft 1994-8-2 2400 Lassen About 2 miles west of Boot Lake. 2286 Comment
  CHSC60874  Arnica sororia Vernon H. Oswald; Lowell Ahart 1993-7-8 5668 Lassen Halls Flat Rd. (33N18), 0.4 mi SW of Pittville Rd. (Lassen 111, 36N01), ca. 5.4 mi (air) NW of Poison Lake. 1706 Comment
  CAS-BOT-BC85003  Artemisia arbuscula subsp. arbuscula Clare B. Hardham 1971-8-22 18370 Lassen Diamond Mountain 2346 Comment
  UCD129263  Artemisia biennis Malcolm A. Nobs; Galen Smith 1949-8-20 1482 Lassen Long Creek, 1 mile north of Doyle, Honey Lake Valley. Comment
  CAS-BOT-BC84828  Artemisia cana subsp. cana Ernest C. Twisselmann 1961-7-21 6572 Lassen Harvey Valley 1981 Comment
  CAS-BOT-BC90329  Artemisia douglasiana Clare B. Hardham 1969-8-28 17443 Lassen slope west of Janesville Comment
  JEPS127351  Artemisia ludoviciana subsp. ludoviciana Lowell Ahart, John Dittes 2016-7-13 21105 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC30627  Artemisia tridentata M. A. Dubin 1975-7-20 8 Lassen Eagle Lake Field Station by Turkey Roll Hill. 1569 Comment
  CHSC42148  Artemisia tridentata C. E. Laver 1985-8-12 Lassen Ca. 8.5 mi SE of Madeline and 9 mi NE of Termo. 2194 Comment
  UCR67441  Artemisia tridentata George K. Helmkamp 1990-9-23 D- 7 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  JEPS37010  Artemisia tridentata subsp. tridentata W. L. Jepson 1918-8-5 7819 Lassen Madelin Plains 1615 Comment
  SEINET3360477 Image available Artemisia tridentata subsp. tridentata A. A. Beetle 1957-8-16 12891 Lassen Between Ravendale and Termo. 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
  JEPS123853  Asclepias fascicularis Lowell Ahart, John Dittes 2015-7-14 20325 Lassen About 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. Comment
  CHSC6223  Asclepias speciosa M. West 1946-7-7 Lassen Eagle Lake 1584 Comment
  POM181067  Aster M. S. Jussel 1931-9-6 s.n. Lassen Sulphur Works, Mt. Lassen 2134 Comment
  RSA757476  Aster ascendens Barbara Ertter 1987-7-24 7299 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  UCR67471  Aster foliaceus George K. Helmkamp 1990-9-23 G- 12 Lassen north of Ravendale 1677 Comment
  CHSC4429  Astragalus K. R. Stern 1967-6-30 2453 Lassen West Central side of Eagle Lake. 1554 Comment
  UCD105587  Astragalus Grady L. Webster 1989-5-13 7720 Lassen 2.5 miles E of Beckworth Pass. 1493 Comment
  CAS-BOT-BC177324  Astragalus agrestis G. Schoolcraft 1986-6-25 1642 Lassen About 3 miles N WW of Termo 1615 Comment
  CAS-BOT-BC177437  Astragalus andersonii John Thomas Howell 1934-6-10 11846 Lassen 4 miles south of Omira Comment
  CAS-BOT-BC177441  Astragalus andersonii M. S. Taylor 1982-5-29 4561 Lassen NW corner of the jct of Scott Rd and Hwy 395, ca. 20 mi n of Reno Comment
  CHSC106586  Astragalus andersonii C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  NY791374  Astragalus andersonii LeDoux 1973-5-24 861 Lassen Collected at jct. of Highways 70 and 395 at Arco Station. Comment
  SEINET4856104  Astragalus anxius Unknown 1991-7-16 6108 Lassen Ash Valley, ca. 25 km W of madeline, along Ash Valley Rd., on boundary of T38N, R11E, Sect. 32 and T37N, R11E, Sect. 5. 1550 Comment
  NY797391  Astragalus canadensis var. brevidens G. Schoolcraft 1989-6-19 1920 Lassen Along north shore of Eagle Lake 1554.5 Comment
  CAS-BOT-BC178763  Astragalus canadensis var. brevidens John Thomas Howell 1977-8-11 52718 Lassen EAst of Beckwourth Pass, near Halleluja Junction - Sierra Nevada 1554 Comment
  UC82577  Astragalus canadensis var. brevidens unknown 1892-6-20 Lassen Milford Comment
  CDA26649  Astragalus curvicarpus T. C. Fuller 1965-6-3 13607 Lassen 1.3 miles west-northwest of Janesville. 0 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
  SEINET5325006  Astragalus curvicarpus var. curvicarpus G. Schoolcraft 1993-6-10 2286 Lassen Along US Highway 395 near road to Clark Ranch. 1280 Comment
  CAS-BOT-BC182958  Astragalus filipes H. D. Ripley; R. C. Barneby 1943-6-15 5759 Lassen East of Viewland 1310 Comment
  CHSC106082  Astragalus filipes Lowell Ahart; John Dittes 2010-7-31 16976 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
  JEPS117260  Astragalus filipes Lowell Ahart, John Dittes 2010-7-31 16976 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
  RSA111070  Astragalus filipes H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5675 Lassen South of Constantia. 1463 Comment
  SEINET10903957  Astragalus filipes Williams 1983-7-31 Williams 83 -125-1 Lassen Ash valley road, 17 mi from aden. 1829 Comment
  CAS-BOT-BC186857  Astragalus gibbsii G. Schoolcraft 1993-6-8 2285 Lassen US Highway 395 at Airport Rd. 1274 Comment
  CDA19718  Astragalus gibbsii D. Tillotson 1942-6-1 s.n. Lassen Modoc Plateau; Mud Flat. 1341 Comment
  CAS-BOT-BC186867  Astragalus gibbsii H. D. Ripley; R. C. Barneby 1942-5-22 4541 Lassen Loyalton 1524 Comment
  RSA110069  Astragalus gibbsii H. D. Ripley, R. C. Barneby, F. C. Ripley Jr. 1943-6-13 5692 Lassen South of Milford. 1433 Comment
  RSA647557  Astragalus gibbsii Marion P. Harthill 1971-6-20 220 Lassen Ravendale Comment
  CAS-BOT-BC186913  Astragalus inversus H. D. Ripley; R. C. Barneby 1943-6-14 5749 Lassen W. of Susanville 1310 Comment
  RSA0006769  Astragalus inversus H. D. Ripley, R. C. Barneby 1943-6-14 s.n. Lassen West of Susanville. Comment
  SEINET5325323  Astragalus iodanthus var. diaphanoides M. J. Williams, Gary Schoolcraft; Arnold Tiehm 1986-5-12 86- 23 -2 Lassen Smoke Creek Rd, E of Hwy 395, 1 mi W of Nevada-Calif. Boundary. 1341 Comment
  POM45791  Astragalus lemmonii Marcus E. Jones 1897-6-19 s.n. Lassen Chat. 1616 Comment
  RSA0028050  Astragalus lentiginosus John F. Emmel 1996-7-14 1424 Lassen North base of Ft. Sage Mts., south edge of Honey Lake Valley; gently sloping sandy flats 0.2-0.3 air mile north and 0.15-0.3 air mile east of 4818 ft. peak of Turtle Mtn. 1280 Comment
  CHSC110304  Astragalus lentiginosus var. floribundus L. P. Janeway; B. Castro 2012-7-2 10929 Lassen Modoc Plateau. East side of Skedaddle Mountains; along Skedaddle Road 19.6 road km north of the Wendel Road; about 1.0 km south of Skedaddle Creek; at the Nevada state line. 1542 Comment
  UC1537105  Astragalus lentiginosus var. floribundus Gordon H. True Jr. 1938-7-8 903 Lassen n Hot Spring Mountain (Mud Flat); n of Hot Spring Mountains, Mud Flat 1371 Comment
  CAS-BOT-BC187161  Astragalus lentiginosus var. floribundus H. D. Ripley; R. C. Barneby 1943-6-13 5678 Lassen N. of Doyle 1264 Comment
  CHSC99508  Astragalus lentiginosus var. lentiginosus Lowell Ahart; John Dittes 2008-6-22 15046 Lassen Open meadow, east of the old barn, east of the dirt road, open meadow area, in Big Valley, about 4.7 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.7 miles (air) northeast of Bieber. 1268 Comment
  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
  UC1609460  Astragalus lentiginosus var. lentiginosus Vernon H. Oswald and Lowell Ahart 1993-7-8 5663 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi n Hwy 44 (se edge Poison Lake); se edge Poison Lake 1709 Comment
  CAS-BOT-BC187331  Astragalus lentiginosus var. salinus Alice Eastwood; John Thomas Howell 1940-6-16 8335 Lassen Near Susanville Comment
  CAS-BOT-BC187561  Astragalus malacus Mrs. C. C. Bruce 1898-6-1 2214 Lassen Madaline Plains & Modoc Comment
  CDA26707  Astragalus malacus T. C. Fuller 1963-6-11 10659 Lassen West side of Highway 395 at road to Horse Lake, 1.5 miles south of Ravendale. 0 Comment
  POM45581  Astragalus malacus Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  POM45991  Astragalus malacus R. M. Austin 1897-05 400 Lassen Madaline plains. Comment
  RSA584731  Astragalus malacus Bruce Bartholomew, M. Gilbert, L. Skog 1993-5-13 6551 Lassen Just S. of Ravendale. 1580 Comment
  RSA0006819  Astragalus malacus H. D. Ripley, R. C. Barneby 1944-5-30 5974 Lassen South of Ravendale. 1677 Comment
  UC1128893  Astragalus obscurus A. Simontacchi 1940-5-17 748 Lassen 1.1 mi ssw Dixie Spring (Lassen National Forest); Halls Flat Quad., , ssw of Dixie Sprin Comment
  UC1128861  Astragalus pulsiferae E. Sawyer 1935-6-27 237 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UC65741  Astragalus pulsiferae P. B. Kennedy 1901-6-10 Lassen R.R. Station Constantia (Constantia) Comment
  CAS-BOT-BC192855  Astragalus pulsiferae var. pulsiferae G. Schoolcraft 1989-6-7 1906 Lassen East slope of Shaffer Mtn. Comment
  RSA111760  Astragalus pulsiferae var. pulsiferae H. D. Ripley, R. C. Barneby 1944-5-30 5967 Lassen North of Secret Valley. 1616 Comment
  SEINET5324389  Astragalus pulsiferae var. pulsiferae M. J. Williams 1974-7-26 74 L-16 Lassen 2 mile W of Hallelujah Junction, S of Hwy 70. 1494 Comment
  JEPS54815  Astragalus purshii L. S. Smith 1916-5-22 Lassen Honey Lake Comment
  CAS-BOT-BC194090  Astragalus purshii var. purshii H. D. Ripley; R. C. Barneby 1943-6-14 5741 Lassen West of Susanville 1310 Comment
  CHSC48504  Astragalus purshii var. purshii Vernon Oswald 1986-5-28 2052 Lassen Rd. 201 on the west side of Eagle Lake, 22.1 mi n of Hwy 36, 9.2 mi n of Gallatin Beach Road. 1615 Comment
  CHSC91198  Astragalus purshii var. purshii Lowell Ahart; John Dittes 2005-6-1 11870 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
  CAS-BOT-BC194095  Astragalus purshii var. purshii Clare B. Hardham 1978-4-20 21588 Lassen North west edge of Susanville Comment
  CAS-BOT-BC192972  Astragalus purshii var. tinctus John Thomas Howell 1934-6-10 11862 Lassen Honey Lake Valley 37 miles s. of Susanville Comment
  NY694434  Astragalus purshii var. tinctus W. W. Eggleston 1911-5-29 6711 Lassen Vicinity of Doyle Station Comment
  UC1136766  Astragalus purshii var. tinctus George A. Fischer and Irwin H. Johnson 1933-7-14 F- 249 Lassen Lassen Forest 1767 Comment
  SEINET10490027  Astragalus purshii var. tinctus Paul Gallian, David B. Dunn 1971-6-2 Gallian 497 Lassen Approx 22 mi s of adin on calif hwy 139; in basalt; assoc juniper artemisia. 1646 Comment
  UC1601984  Astragalus purshii var. tinctus Mrs. R. M. Austin 1879-1 Lassen Comment
  UC82594  Astragalus whitneyi T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CAS-BOT-BC200875  Astragalus whitneyi var. lenophyllus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 7 miles below Eagle Lake 1524 Comment
  CHSC5284  Astragalus whitneyi var. siskiyouensis V. Holt 1945-6-1 Lassen Eagle Lake. Comment
  CAS-BOT-BC199135  Astragalus whitneyi var. siskiyouensis H. D. Ripley; R. C. Barneby 1943-6-14 5747 Lassen Above Hidden Valley W of Susanville 1584 Comment
  SEINET3025881  Astragalus whitneyi var. sonneanus Marcus E. Jones 1897-6-28 Lassen Top of Diamond Peak, Susanville, Perkins Ranch. Comment
  CHSC29871  Astragalus whitneyi var. whitneyi Robin L. Ondricek 1978-7-22 106 Lassen One mi s of Colley Point Overlook on Hwy 139. 1670 Comment
  SEINET5344853  Atriplex canescens S. Massed, Jared Jaggers, D. Mathews 2011-10-24 Seeds of Success. NV 030 . Carson Lassen Northeast of Doyle. On the Northern slopes of Fort Sage Mountains. 1291 Comment
  CDA23253  Atriplex confertifolia Robin Breckenridge 2007-5-1 PDR# 1349824 B Lassen Wendel. 0 Comment
  POM102968  Atriplex gardneri var. falcata Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  UC1035992  Balsamorhiza Helen K. Sharsmith 1955-6-22 4500 Lassen 5 mi beyond, on road to Likely Bue Lake; Warner Mountains, Modoc National Forest 1767 Comment
  CAS-BOT-BC106497  Balsamorhiza hookeri John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49167 Lassen In open yellow pine forest, Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  JEPS1758  Balsamorhiza hookeri Milo S. Baker 1952-5-23 12432 Lassen 1/2 mi w of, along Hwy. 36 Fredonyer Pass 1752 Comment
  JEPS30490  Balsamorhiza hookeri Peter H. Raven and Otto T. Solbrig 1958-6-17 13292 Lassen o.4 mi s, along U.S. Highway 395 Ravendale Comment
  UC1794994  Balsamorhiza hookeri R. K. Brummitt 1998-5-17 19897 Lassen 12 km W of Susanville, E foot of Fredonyer Pass 1400 Comment
  UC964788  Balsamorhiza hookeri Milo S. Baker 1952-5-23 12432 Lassen 1/2 mi west of Fredonyer Pass, Highway 36 Comment
  UC336215  Balsamorhiza hookeri unknown Lassen 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
  UC1119027  Balsamorhiza sagittata H. P. Hagge 1929-9-11 20 Lassen Logan Mtn. Eagle Lake Quad. 1828 Comment
  CAS-BOT-BC16437  Barbarea orthoceras George Wilson Gillett 1957-7-21 868 Lassen Lassen Volcanic National Park. Juniper Lake - Cameron Meadow trail. 300 yards north of trail summit. 2118 Comment
  CHSC76094  Bassia hyssopifolia Lowell Ahart 1999-9-13 8206 Lassen On the east side of the dirt road and 1/2 mile south of the sign in station, Honey Lake Wildlife Area, 4 1/2 miles (air) southeast of Standish. 1207 Comment
  CAS-BOT-BC145784  Beckmannia syzigachne Peter H. Raven; Otto T. Solbrig 1958-6-17 13262 Lassen United States Highway 395, 2.1 miles northeast of Standish. Comment
  CHSC99275  Beckmannia syzigachne Lowell Ahart; John Dittes 2008-6-20 14946 Lassen In swales, about 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  HSC9041  Beckmannia syzigachne Fred Kindel 1955-6-24 Lassen Mt.Meadows Reservoir Comment
  UC37450  Beckmannia syzigachne J. Burtt Davy Jun 17 1897-Jun 24 1897 3315 Lassen Honey Lake Valley Comment
  UC573777  Beckmannia syzigachne H. S. Yates 1936-8-11 6078 Lassen 2 mi ese Susanville; Susanville Quadrangle 1280 Comment
  UCD56782  Beckmannia syzigachne Leo Whitney 1934-8-6 2210 Lassen Honey Lake Valley. Bank of Susan River. 1371 Comment
  UC1135177  Betula glandulosa D. Dunning 1935-9-5 Lassen Bridge Creek Lassen National Forest, Eagle Lake Quadrangle Comment
  HSC95769  Bidens cernua Gordon Leppig, J. Cromwell 1997-7-27 616 Lassen Modoc National Forest, Blue Lake Ranch. 1970 Comment
  CHSC1342  Bistorta bistortoides L. Harmon 1946-6-23 Lassen Squaw Valley. Comment
  SBBG29153  Bistorta bistortoides A. A. Heller 1938-6-23 15141 Lassen 2 mi E of Westwood Comment
  CAS-BOT-BC127972  Blepharipappus scaber Ella Dales Cantelow 1941-5-22 3551 Lassen U. S. Hy 395 n. of Litchfield Comment
  CAS-BOT-BC128041  Blepharipappus scaber Farris Farris 1935-5-20 s.n. Lassen Three miles southwest of Susanville 1341 Comment
  CHSC92756  Blepharipappus scaber L. P. Janeway 2005-7-4 8462 Lassen High Cascade Range. Ridge top north above Long Valley; 0.4 km west of Road 34N41. 1752 Comment
Read comments
May 24 2013
  POM204103  Blepharipappus scaber J. T. Howell 1934-6-10 11894 Lassen Horse Lake Comment
  SJSU4600  Blepharipappus scaber J. W. Tilden 1958-6-27 1287 Lassen Madeline Comment
  CAS-BOT-BC127955  Blepharipappus scaber Dr. Jean Linsdale 1929-6-9 s.n. Lassen Pete's Valley Comment
  RSA152683  Blepharipappus scaber I. L. Wiggins, Dorothy Wiggins 1961-6-11 16355 Lassen Roadside east of Eagle Lake, 2 miles north of Susanville. Comment
  SEINET10912069  Blepharipappus scaber David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17767 Lassen Approx. 12 mi. S of Adin on CA Hwy. 139, in basalt & clay; along edge of road on rolling knoll, in Artemisia-Juniper assoc. 1372 Comment
  UC1924569  Boechera Debra Valov 2006-5-30 2006041 Lassen Bieber off County Rd A2 c. 12 km east of Hwy 299 1285 Comment
  UC1126591  Boechera pauciflora A. Simontacchi 1940-6-6 822 Lassen 10.2 mi se Nigger Cabin; Lassen National Forest, Halls Flat Quad. 1737 Comment
  UC1523799  Boechera rectissima Gary Schoolcraft 1981-8-7 610 Lassen near London lookout 1950 Comment
  CHSC101020  Boechera retrofracta John Dittes 2008-5-22 1533 Lassen Modoc Plateau; ca 15.4 air miles southeast of Adin, ca. 3.6 air miles east of Hayden Hill, ca. 0.2 mile southeast of intersection of Hwy 139 and FS Road 36N02; edge of wooded volcanic toe-slope on northeast side of Willow Creek. 484 Comment
  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
  UC1126590  Boechera retrofracta A. Simontacchi 1940-5-13 699 Lassen 7.5 mi wsw Cone Ranch Hdq.; Lassen National Forest, Halls Flat Quad. 1920 Comment
  CAS-BOT-BC25511  Boechera retrofracta Clarence Roy Quick 1961-6-21 61 -24 Lassen Black Mountain Experimental Forest northeast of Lassen Peak. Forest adjacent to Road 21. 1798 Comment
  CAS-BOT-BC25705  Boechera sparsiflora John Thomas Howell; Gordon H. True 1973-7-31 50064 Lassen Sierra Nevada. Diamond Range. Road from Janesville to Thompson Peak. 1783 Comment
  CHSC29908  Boechera sparsiflora Robin Ondricek 1978-6-6 38 Lassen 1.3 mi N of Pine Creek Bridge on Co. Rd. 518. 1554 Comment
  CAS-BOT-BC25706  Boechera sparsiflora Reed Clark Rollins; Kathryn W. Rollins; Aileen Roads 1983-7-5 83226 Lassen Plumas National Forest. Above Laufman Ranger Station. 4.5 miles east of US Highway 395. Comment
  CAS-BOT-BC25864  Boechera subpinnatifida Doris Kildale Gillespie 1930-5-14 9382 Lassen Fredonia [Fredonyer] Pass near Susanville. Comment
  POM253282  Boisduvalia densiflora var. pallescens A. A. Heller 1938-7-28 15296 Lassen About a mile east of Westwood 1524 Comment
  POM46125  Boisduvalia glabella Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CAS-BOT-BC127868  Brickellia greenei Clare B. Hardham 1969-8-28 17430 A Lassen Granitic slope west of Janesville Comment
  UCR202646  Brickellia microphylla George K. Helmkamp 1990-9-23 B- 15 Lassen Modoc Plateau, Susanville 1189 Comment
  RSA0065492  Bromus breviaristatus Marion P. Harthill 1971-6-21 208 Lassen Susanville. Comment
  CHSC64814  Bromus briziformis Vernon H. Oswald 1995-5-31 6799 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  JEPS26570  Bromus briziformis Lauramay T. Dempster 1961-6-17 1675 Lassen about 8 mi n of Karlo Road junction with Hwy 395, w of highway Karlo Road 1584 Comment
  SEINET8506610  Bromus briziformis D. W. Taylor 2005-6-29 19380 Lassen Piute Creek, 3 miles West from western edge, Susanville 1311 Comment
  UCR67017  Bromus briziformis George K. Helmkamp 1990-9-23 D- 11 Lassen 20 mi north of Litchfield along US Hwy 395 1437 Comment
  UC773968  Bromus carinatus var. carinatus L. R. Short and J. Warren 1936-6-29 S 460 Lassen Lassen National Forest, Burgess Spring Experimental Range Burgess Spring Experimental Range; Lassen National Forest, Burgess Spring Experimental Range 1820 Comment
  CAS-BOT-BC155939  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak. Comment
  CAS-BOT-BC155942  Bromus commutatus A. A. Beetle 1941-6-28 2817 Lassen 6 miles south of Ravendale. Lower slopes of Observation Peak. Comment
  UC1037118  Bromus commutatus Leo Whitney 1934-7-22 2249 Lassen 5 mi w of lower end of Eagle Lake (Lassen National Forest, Antelope Mountain); Lassen National Forest, Antelope Mountain 1981 Comment
  UC570172  Bromus commutatus H. S. Yates 1936-8-11 6074 Lassen Baxter Creek 1280 Comment
  UCR119122  Bromus hordeaceus Beecher Crampton 1954-7-5 2067 Lassen Modoc Plateau, 5 miles west of Susanville. 1448 Comment
  CAS-BOT-BC155325  Bromus inermis John Thomas Howell 1975-7-23 51410 Lassen Sierra Nevada. Along Highway 395 between Johnstonville and Jonesville. 1280 Comment
  UCD58839  Bromus inermis M. C. Collins 1926-6-14 s.n. Lassen Susanville. Comment
  UC1037125  Bromus marginatus Leo Whitney 1935-6-19 3262 a Lassen near Camp 10 (Lassen National Forest, Fruit Grower's Supply Company); Lassen National Forest, Fruit Grower's Supply Company Comment
  CDA1862  Bromus tectorum A. A. Beetle 1941-6-28 2796 Lassen Rte. 36, 10 miles west of Chester. 0 Comment
  CHSC112781  Bromus tectorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18751 Lassen Drainage filled with dirt from the 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
  CHSC44553  Bromus tectorum Lowell Ahart; John Thomas Howell 1974-7-9 520 Lassen Along the edge of Eagle Lake Road, about 5 miles north-west of Susanville. 1584 Comment
  CHSC7696  Bromus tectorum Beverley J. Wise 1969-4-28 127 Lassen North city limits of Milford (Hwy 395). 1310 Comment
  JEPS107312  Bromus tectorum Lowell Ahart, John Dittes 2005-6-1 11909 Lassen Road edge, 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
  RSA126830  Bromus tectorum H. S. Yates 1937-5-12 6085 Lassen McKenzie Meadow; Susanville 1524 Comment
  UC1024646  Bromus tectorum Leo Whitney 1933-7-8 2209 Lassen 8 mi nw of Eagle Lake (Lassen National Forest, Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  UCD59875  Bromus tectorum R. N. Raynor 1940-4-16 s.n. Lassen Round Valley. Comment
  CAS-BOT-BC185530  Bromus vulgaris John Thomas Howell; Gordon H. True 1973-7-31 50056 Lassen Sierra Nevada. On road from Janesville to Thompson Peak, Diamond Range. 1783 Comment
  CHSC68744  Callitriche hermaphroditica Vernon H. Oswald; Lowell Ahart 1997-5-27 8514 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy. 139. 1682 Comment
  RSA772870  Callitriche hermaphroditica R. F. Thorne, Larry E. DeBuhr 1975-8-22 47204 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  JEPS120868  Callitriche heterophylla Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18750 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UCD169625  Callitriche palustris R. F. Thorne; Larry E. DeBuhr 1975-8-22 46986 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1615 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
  CHSC4778  Calochortus leichtlinii R. Carter 1967-6-27 552 Lassen Ca. 10 yds. Off N side of Rd., 1.75 mi W of Eagle Lake Biology Station. 1584 Comment
  UC423015  Calochortus leichtlinii Franklin P. Nutting Lassen Pine Creek Comment
  UC727118  Calochortus leichtlinii A. A. Heller 1938-6-23 15200 Lassen e of Fredonyer Pass 1219 Comment
  CAS-BOT-BC487963  Calochortus leichtlinii T. S. Brandegee 1892-7-2 s.n. Lassen Susanville Comment
  SEINET4169872  Calochortus leichtlinii A. A. Heller 1938-6-26 Lassen E. of Fredonyer Pass on State Hwy 36. 1219 Comment
  UC119897  Calochortus macrocarpus T. S. Brandegee 1892-7-1 Lassen Susanville Comment
  SD52068  Calochortus nuttallii F. Stephens 1894-7-2 10337 Lassen Robbins Creek. Comment
  HSC63946  Calyptridium monospermum Teresa Prendusi 1980-7-14 Lassen Ash Valley, about 15 mi. W of Madeline along Ash Valley Rd. 1524 Comment
  UC1136686  Calyptridium monospermum A. Simontacchi 1940-6-17 941 Lassen 2.3 mi ssw of Blacks Mountain (Lassen National Forest); Lassen National Forest 1798 Comment
  UC851940  Calyptridium monospermum C. L. Hitchcock 1940-5-26 6608 Lassen 12 mi n of Fall River Mills (on Fall River); Fall River 1371 Comment
  CHSC36436  Calyptridium umbellatum Dave Lueck 1981-6-13 18 Lassen Dirt road at base of N. E. side of Galletin Peak. 1584 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
  CHSC67062  Calyptridium umbellatum Willis Ball 1969-6-20 16 Lassen Found beside road on Dean's Ridge. 1950 Comment
  JEPS17206  Calyptridium umbellatum Frances D. Payne 1929-7-12 101 Lassen Lost Lake, Camp I Lost Lake; Warner Mountains, , Camp I 2286 Comment
  RSA122815  Calystegia occidentalis subsp. occidentalis L. R. Short, Wm. Gansberg 1936-7-3 S- 469 Lassen MDM, Burgess Spr. Exp. Range. 1849 Comment
  CHSC60789  Camassia quamash subsp. breviflora Vernon H. Oswald; Lowell Ahart 1993-6-3 5475 Lassen Champs Flat Rd. (Lassen 21/105, Forest 32N02), 3.7 mi N of Hwy 44 at spur road 32N02E, on the SE side of Pine Creek Valley, between Poison Lake and Susanville. 1731 Comment
  CAS-BOT-BC497555  Camassia quamash subsp. breviflora G. S. Crew 1927-6-10 55836 Lassen Norval flat Comment
  SBBG70392  Camelina sativa subsp. sativa H. and M. Dearing 1939-6-6 3564 Lassen Bieber Comment
  NY850967  Camissonia boothii subsp. alyssoides A. Tiehm 1980-5-29 5754 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  RSA294814  Camissonia boothii subsp. alyssoides Arnold Tiehm 1980-5-29 5754 Lassen North end of Honey Lake Valley, 2 air miles NW of Wendel. 1232 Comment
  HSC69590  Camissonia claviformis subsp. cruciformis Gary Schoolcraft 1980-5-16 235 Lassen Behind kiln oven on Wendel Hwy. 1280 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
  JEPS107788  Camissonia contorta Lowell Ahart, John Dittes 2005-6-2 11939 Lassen Long Valley, along a poor dirt road, about 1 1/2 miles northeast of the Anderson Ranch home, about 6 miles (air) north of the interesection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1600 Comment
  POM38345  Camissonia contorta Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 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
  HSC81475  Camissonia tanacetifolia Thomas W. Nelson, Jane P. Nelson 1980-7-6 6011 Lassen Along Adin-Madeline Rd., 15 mi. E of Adin in Ash Valley just beyond bridge at baths 1555 Comment
  HSC86885  Camissonia tanacetifolia R. Carter 1967-6-23 547 Lassen Upper part of Murrer's Meadow Comment
  NY852074  Camissonia tanacetifolia Mrs. C. C. Bruce 06 1898 2203 Lassen Susanville Comment
  NY852078  Camissonia tanacetifolia P. H. Raven 1962-5-28 17876 Lassen 0.5 mile north of Ravendale Comment
  RSA12158  Camissonia tanacetifolia subsp. quadriperforata Wayne E. Sawyer 1935-6-27 219 Lassen Long Valley. 1311 Comment
  CAS-BOT-BC160873  Camissonia tanacetifolia subsp. tanacetifolia John Thomas Howell 1934-6-10 11883 Lassen 12 miles n. of Susanville on road to Horse Lake Comment
  NY119877  Cardamine breweri R. C. Rollins 1981-5-30 81168 Lassen Gold Run Road, toward Ski Line Drive, 10 miles S of Susanville Comment
  CAS-BOT-BC37252  Cardamine breweri Louella Bass 1980-5-22 s.n. Lassen Sierra Nevada. Bagley Springs along Susan River between Devil's Corral and Susanville. Comment
  CAS-BOT-BC18286  Carex John Thomas Howell; Gordon H. True 1973-8-1 50228 Lassen Sierra Nevada. East slope of Diamond Range south of Susanville. Headwaters of Baxter Creek. 2133 Comment
  CAS-BOT-BC18285  Carex John Thomas Howell 1975-7-23 51408 Lassen Sierra Nevada. Along Highway 395 between Johnstonville and Janesville. 1280 Comment
  CDA33021  Carex athrostachya T. C. Fuller 1980-8-5 20309 Lassen Adjacent to boat ramp, campground on the east shore of Dodge Reservoir, 28 km (17.5 miles) northeast of Ravendale. 0 Comment
  HSC95169  Carex cusickii Gordon Leppig 1998-7-12 952 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC33051  Carex douglasii J. P. Smith; John Sawyer 1971-5-23 4664 Lassen Along Calif. 139, 1 mi. south of Jct. with road to Thermo. Comment
  CAS-BOT-BC19776  Carex douglasii L. P. Janeway 1990-7-4 3766 Lassen Plumas National Forest. Milford Ranger District. East side of saddle, ca. 0.8 mile northeast of Meadowview Peak. 1981 Comment
  SEINET7558593 Image available Carex filifolia var. erostrata L. P. Janeway 2004-6-26 8162 Lassen High Cascade Range. At Patterson Well in Patterson Flats. Blacks Mountain Experimental Forest. Poison Lake 7.5' quad. 1767 Comment
  CAS-BOT-BC22237  Carex haydeniana John Thomas Howell 1934-6-14 12163 Lassen Near Lost Lake. Warner Mountains. 2438 Comment
  CAS-BOT-BC28194  Carex hoodii George Wilson Gillett 1957-7-29 946 Lassen Trail between Butte Lake and Snag Lake, 1/4 mi above Butte Lake. 1859 Comment
  SEINET7561726 Image available Carex hoodii L. P. Janeway 2003-7-24 7917 Lassen Swain Mountain 7.5' quad. High Cascade Range. Along Forest Service Road 30N14. 1.1 km from Road 30N21, small side drainage of upper Susan River 4.7 (air) km west of Clover Valley. 1932 Comment
  UC1609339  Carex lasiocarpa Vernon H. Oswald and Lowell Ahart 1993-8-3 5752 Lassen e Silver Lake (nw part of the swamp, just e of the Caribou Wilderness, ca. 13 mi (air) n of Lake Almanor); Cooper Swamp 1932 Comment
  JEPS88667  Carex lenticularis var. impressa Dean W. Taylor 1975-8-24 5407 Lassen margin of Everett Lake Thousand Lake Wilderness Area, Magee Peak, Everett Lake 2307 Comment
  CHSC114406  Carex microptera Don Lepley 2014-6-24 Lassen Lassen National Forest, Eagle Lake Ranger District. Two air miles east of Diamond Mountain summit, around landing at end of Road 28N52A. 2133 Comment
  CHSC67310  Carex microptera James D. Jokerst 1991-5-28 3295 Lassen Modoc Plateau. At the N end of Eagle Lake, seep E and adjacent to highway at spring shown on USGS map. 1554 Comment
  POM81434  Carex multicaulis Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain. Susanville. Perkin s Ranch. 1829 Comment
  CHSC110970  Carex nebrascensis Lowell Ahart; John Dittes 2012-7-9 18298 Lassen Scattered along a small drainage, about 150 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northest of Bieber, Big Valley. 1267 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
  RSA755319  Carex nebrascensis L. Ahart, John Dittes 2008-6-22 15019 Lassen On the north side of the levee, about 90 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 air miles northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 air miles northeast of Bieber. 1261 Comment
  UC1100497  Carex nebrascensis Verne Grant and Herbert L. Mason 1947-7-9 13301 Lassen 5 mi e Bieber Comment
  UC1133502  Carex nebrascensis Robert W. Gardner 1939-6-6 G- 29 Lassen Little Harvey Valley Halls Flat Quadrangle Comment
  JEPS128406  Carex pellita Catherine Bauer with Ellen Bauer Benson 2017-8-16 14 Lassen South of Highway 44, North of Butte Lake, between Butte Creek and access road into Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  CHSC89743  Carex petasata L. P. Janeway 2004-6-26 8139 Lassen High Cascade Range. Halls Flat; about 0.3 km east of Road 33N13 3.5 km north of junction of Road 33N18. 1714 Comment
  CHSC93433  Carex petasata Martin J. Lenz 2004-6-23 221 Lassen Approx. 0.6 air mi. WSW of Schoonamaker Lake. UTM 10 664213 E 4515435 N. Edge of seasonally wet meadow. 1707 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
  JEPS107836  Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11879 Lassen about 3/4 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction Comment
  SEINET7572132 Image available Carex praegracilis Lowell Ahart, John Dittes 2005-6-1 11864 Lassen On west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC190401  Carex praegracilis M. S. Baker and Frank Nutting 1894-7-6 Lassen Dixie Valley Comment
  CAS-BOT-BC118740  Carex preslii John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49455 Lassen Elysian Valley, west of Janesville 1325 Comment
  CHSC54424  Carex raynoldsii Vernon H. Oswald 1991-6-25 4695 Lassen Lassen Volcanic National Park. Butte Lake-Snag Lake Trail, just south of its junction with Butte Lake-Widow Lake Trail, in the northeast corner of the park. 1842 Comment
  HSC48339  Carex rossii D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19176 Lassen Harvey Valley near Cone Springs 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-BC117017  Carex straminiformis John Thomas Howell; Gordon H. True 1973-8-1 50200 Lassen Ca 3 mi SE of Diamond Mt. East slope of Diamond Range, south of Susanville. Comment
  CHSC77248  Carex subfusca G. Schoolcraft 1997-7-9 2608 Lassen S of Doyle Corral. 1706 Comment
  JEPS28383  Carex subfusca George W. Gillett 1957-7-26 913 Lassen e shore Butte Lake Lassen Volcanic National Park, Butte Lake 1844 Comment
  UC2031888  Carex subfusca Nick Otting and Bruce Newhouse 2003-7-15 680 Lassen Sierra Nevada Mountains, Diamond Mountain, 1700 feet southeast of summit, 8 air miles south-southwest of Susanville. Comment
  CAS-BOT-BC116607  Carex subfusca Clare B. Hardham 1971-8-22 18383 Lassen Diamond Mountain streambed. 2133 Comment
  CAS-BOT-BC115062  Carex vesicaria George Wilson Gillett 1957-7-22 879 Lassen South shore of Snag Lake, margin of gravel bars 100 yards from lake. 1850 Comment
  HSC95273  Carex vesicaria Gordon Leppig 1998-7-12 942 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  JEPS63615  Carex whitneyi Leland S. Smith 1922-7-23 75 Lassen Lassen National Forest Comment
  CHSC106686  Castilleja angustifolia B. Ignacio 2008-5-3 Lassen Fort Sage Mountains. 1520 Comment
  JEPS62334  Castilleja angustifolia John L. Strother 1970-5-23 954 Lassen ca 6 mi n Honey Lake 1280 Comment
  CHSC62002  Castilleja applegatei Eenam Sin 1992-6-3 23 Lassen 1 mi s of 4-carners on road to Gallatin Peak. 1524 Comment
  SEINET10818435  Castilleja applegatei subsp. pinetorum Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 152 Lassen Lassen National Forest. 6 miles SW on 32N10 off Hwy. 44. (Turn at rest area on Hwy. 44). At junction of 32N10, 32N09 and 31N36. 1993 Comment
  UC1012183  Castilleja applegatei subsp. pinetorum Francis W. Pennell 1940-6-9 25769 Lassen Susanville; Route 36 1371 Comment
  UC1012479  Castilleja applegatei subsp. pinetorum Francis W. Pennell 1940-6-9 25754 Lassen 5 mi n Madeline (Route 395) 1676 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
  UC1136983  Castilleja applegatei subsp. pinetorum L. R. Short and J. Warren 1936-6-5 S- 378 Lassen Burgess Spring Experiment Range; Lassen Forest 1792 Comment
  CHSC68874  Castilleja arachnoidea Vernon Oswald; Lowell Ahart 1997-6-24 8642 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
  UC1609116  Castilleja arachnoidea Vernon Oswald and Lowell Ahart 1993-6-14 5525 Lassen 2.0 mi ene Spaulding Tract Rd. (Rd. 518,33N89) (Eagle Lake Rd (Lassen A1), at Sandy Beach, on the w shore of Eagle Lake, on the upper beach between the road and the lake); Eagle Lake 1566 Comment
  JEPS87488  Castilleja campestris subsp. campestris Vernon H. Oswald and Lowell Ahart 1993-7-8 5644 Lassen near se end Poison Lake (0.4 mi n of Highway 44, Pittville Rd (Lassen 111,36N01), near its intersection with 33N11); near se end Poison Lake 1709 Comment
  UC1609193  Castilleja campestris subsp. campestris Vernon H. Oswald and Lowell Ahart 1993-7-8 5644 Lassen near se end Poison Lake (0.4 mi n of Highway 44, Pittville Rd (Lassen 111,36N01), near its intersection with 33N11); near se end Poison Lake 1709 Comment
  JEPS79153  Castilleja lemmonii L. R. Heckard with R. Bacigalupi 1980-6-12 5260 Lassen ne Westwood (near golf course) 1554 Comment
  JEPS86676  Castilleja lemmonii L. R. Heckard with T. I. Chuang 1990-7-14 6756 Lassen just e Westwood (n of Firland Rd (Hwy 36)) Comment
  JEPS79327  Castilleja linariifolia T. C. Fuller 1980-8-5 20313 Lassen 7.4 km se Dodge Reservoir campground (along e side of Tuledad Road, on the e shore of Dodge Reservoir, ne of Ravendale) Comment
  CAS-BOT-BC244886  Castilleja miniata Louella Bass 1973-6-17 116 Lassen Elysian Valley. Plants of the Sierra Nevada 1325 Comment
  RSA18167  Castilleja miniata Carl B. Wolf 1929-9-1 3778 Lassen Mt. Lassen Nat'l Park, between Grassy Lake and Snag Lake. Comment
  CAS-BOT-BC244889  Castilleja miniata Alice Eastwood 1912-8-22 1893 Lassen Battle Creek meadows. Lassen Butte Region. Comment
  HSC26597  Castilleja pilosa D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19190 Lassen Harvey Valley near Cone Springs Comment
  JEPS17615  Castilleja pilosa Rimo Bacigalupi with G. Thomas Robbins 1955-7-20 5410 Lassen 4.4 mi s Patterson Ranger Station (e edge of Long Valley Meadow, s end of the Warner Mountains); Warner Mountains, Long Valley Meadow 2057 Comment
  RSA505409  Castilleja psittacina R. C. Bacigalupi, S. Galen Smith 1957-6-28 6004 Lassen 5.9 miles south of Madeline. 1616 Comment
  CHSC93238  Castilleja tenuis John Dittes; Scott Chamberlain 2004-6-28 1014 Lassen Modoc Plateau; Long Valley; ca. 2.2 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1445 Comment
  JEPS88198  Castilleja tenuis Vernon H. Oswald and Lowell Ahart 1996-6-17 7802 Lassen 7 mi w Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead off Hwy 36, n side of trail between Devils Corral Trailhead and the 6.0 mi post); Modoc Plateau, Bizz Johnson Trail 1420 Comment
  JEPS96025  Castilleja tenuis Vernon H. Oswald and Lowell Ahart 1996-6-24 7841 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
  CAS-BOT-BC39554  Caulanthus major G. Schoolcraft 1981-7-7 591 Lassen Northwest of Susanville Peak. 2011 Comment
  CHSC115601  Caulanthus major var. nevadensis Lowell Ahart; John Dittes 2015-7-14 30329 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters of Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  HSC26519  Ceanothus cuneatus J. P. Smith, J. O. Sawyer 1972-5-6 5242 Lassen Lassen National Forest, Boundary Campground on Hwy. 89 S of Burney 1067 Comment
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Apr 29 2013
  SEINET5339273  Ceanothus cuneatus W. Priest 1956-4-27 s.n. Lassen 20 mi south of Lassen Park turnoff, Ca. Hwy 36. 762 Comment
  CAS-BOT-BC52049  Ceanothus prostratus Barbara Shervanick 1974-5-7 1273 Lassen About 2 miles North of Milford on Highway 395, 1 mile Southwest of Honey Lake 1219 Comment
  CAS-BOT-BC52053  Ceanothus prostratus A. A. Heller 1941-6-26 16230 Lassen on the ridge West of Nieubieber Comment
  CAS-BOT-BC52055  Ceanothus prostratus Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16317 Lassen 2 miles E of Plumas-Lassen County line, along California Highway 36, near Westwood Comment
  CAS-BOT-BC52056  Ceanothus prostratus C. H. M. 1907-9-15 s.n. Lassen Eldridge's Ranch, East of Hat Creek (N. of Lassen Peak on road from Fall River Mills to Susanville) Comment
  HSC75914  Ceanothus prostratus D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19248 Lassen 3 mi. N of Westwood Comment
  UC506913  Ceanothus prostratus George A. Fischer, Irwin H. Johnson 1933-2-14 F- 263 Lassen Lassen National Forest 1767 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
  CAS-BOT-BC52436  Ceanothus velutinus var. velutinus M. S. Jussel 1931-9-6 s.n. Lassen On the road to Mt. Lassen, five miles from Westwood 1828 Comment
  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
  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
  JEPS94089  Centaurea virgata subsp. squarrosa Vernon H. Oswald and Lowell Ahart 1998-9-8 9571 Lassen Hwy. 299 at the R.R. overpass on the e. side of Nubieber 1255 Comment
  OBI4697  Centaurea virgata subsp. squarrosa T. C. Fuller, W. T. Parsons 1960-7-26 4873 Lassen 4 mi NW of Nubieber, Big Valley Comment
  RSA153397  Centaurea virgata subsp. squarrosa T. C. Fuller 1960-7-26 4873 Lassen 4 miles north of Nubieber, Big Valley Comment
  SEINET5343603 Image available Centaurea virgata var. squarrosa L. White 1950-8-9 s.n. Lassen Roadside and fields, Cramer Ranch, Big Valley Comment
  JEPS95910  Centromadia pungens subsp. pungens Lowell Ahart 1999-9-13 8224 Lassen on the north side of Mapes Road; about 1/2 mile east of Lambert Lane; about 3 1/2 miles (air) southeast of Standish 1210 Comment
  UC762592  Centromadia pungens subsp. pungens R. F. Hoover 1940-10-1 4657 Lassen between Janesville and Standish; Honey Lake Comment
  CHSC99741  Cerastium glomeratum Lowell Ahart; John Dittes 2008-6-20 14966 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber. 1263 Comment
  SJSU10513  Cercocarpus ledifolius C. L. Kline 1965-7-12 190 Lassen 8.3 mi E of Susanville on Hwy 139 1341 Comment
  JEPS94488  Cercocarpus ledifolius var. intermontanus Vernon H. Oswald and Lowell Ahart 1997-5-27 8513 Lassen 1.4 mi e of Highway 139 (n of Susanville on Forest Route 38N04, between Hwy 139 near Willow Creek Guard Station and Coyote Flat, on creek paralleling the road); Forest Route 38N04 1645 Comment
  UC1136909  Cercocarpus ledifolius var. ledifolius L. R. Short 1936-9-30 S 507 Lassen Lassen National Forest, Burgess Spring Experiment Range Burgess Spring Experiment Range; Lassen National Forest, Burgess Spring Experiment Range 1783 Comment
  CHSC80142  Chaenactis douglasii Jeanne Boze 1981-6-11 102 Lassen Along roadside, 5.5 mi from Hwy 139 on Horse Lake Road. 1676 Comment
  CAS-BOT-BC276620  Chaenactis douglasii var. douglasii John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50674 Lassen Summit ridge of Diamond Mountain 2346 Comment
  CHSC75451  Chaenactis douglasii var. douglasii Vernon H. Oswald 1999-6-9 9741 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
  JEPS30488  Chaenactis douglasii var. douglasii Peter H. Raven with Otto T. Solbrig 1958-6-17 13291 Lassen 0.4 mi s of Ravendale (along U.S. Highway 395) Comment
  CAS-BOT-BC276613  Chaenactis douglasii var. douglasii David D. Keck; J. Clausen 1935-6-25 3755 Lassen Susanville, just W of town 1300 Comment
  CHSC4857  Chamaebatiaria millefolium R. Carter 1967-7-13 588 Lassen On the rd to Eagle Lake, Biology Station and Willow Creek. 1584 Comment
  CHSC58521  Chamaesaracha nana Vernon H. Oswald 1992-7-3 5059 Lassen Lassen Volcanic Park. Trail along Grassy Creek between Horseshoe and Snag lakes, ca. 0.1 mi NE of the trail to Cameron Meadow. On slope bordering the trail. 1975 Comment
  CHSC58840  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald; Lowell Ahart 1992-7-16 5114 Lassen Bridge Creek entering McCoy Flat Reservoir on the S side of Hwy. 44 between Old Station and Susanville. Beds of creek and reservoir. 1691 Comment
  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
  JEPS97305  Chamaesyce serpillifolia subsp. serpillifolia Vernon H. Oswald and L. Ahart 1995-8-14 7178 Lassen T30N R15E center NE1/4 Sec. 3, 4425 ft, Modoc Plateau, Sagebrush Scrub, alkaline clay soil. Hwy. 395 at the N end of a Mud Flat, 3.4 mi N of Smoke Creek Ranch Rd., N of Susanville 1348 Comment
  RSA0105580  Chamaesyce serpillifolia subsp. serpillifolia Lowell Ahart, John Dittes 2013-7-22 18857 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
  JEPS52348  Chamaesyce serpyllifolia W. L. Jepson 1918-8-2 7762 Lassen Beckwith Pass 1463 Comment
  UC1924223  Chamaesyce serpyllifolia var. serpyllifolia Debra Valov 2004-6-8 2004251 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  JEPS39306  Chamerion angustifolium subsp. circumvagum Brown and Wieslander 1922-7-23 37 Lassen Martin Sprs. Eagle Lake Comment
  RSA0045636  Chamomilla suaveolens 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
  CAS-BOT-BC426341  Chenopodium John Thomas Howell 1962-6-19 37889 Lassen Sierra Nevada: Sagebrush Flat, 3 mi. S of Hallelujah Junction 1524 Comment
  CAS-BOT-BC473048  Chenopodium Gary Schoolcraft 1984-8-21 1362 Lassen S. slopes of Fredonyer Mtn 1950 Comment
  CHSC76275  Chenopodium album Lowell Ahart; Vernon H. Oswald 1999-9-13 8222 Lassen On the north side of Mapes Road, about 1/2 mile east of Lambert Lane, about 3 1/2 miles (air) southeast of Standish. 1210 Comment
  UCR265181  Chenopodium berlandieri Barbara Ertter 1987-7-24 7301 Lassen Eastern Sierra Nevada Mountains, c. 3/4 mi east-northeastof Beckwourth Pass at end of old paved road 1524 Comment
  CHSC60892  Chenopodium nitens Vernon H. Oswald; Lowell Ahart 1993-7-8 5659 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
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Nov 1 2014
  CAS-BOT-BC426337  Chenopodium nitens John Thomas Howell 1934-7-10 12543 Lassen Patterson Flats Comment
  UC1483847  Chimaphila umbellata G. Schoolcraft 1980-7-29 343 Lassen on Big Valley Mt. timber sale area w. of Bieber 1798 Comment
  RSA755658  Chrysopsis villosa var. hispida Barbara Ertter 1987-7-24 7302 Lassen ca 3/4 mi ENE of Beckwourth Pass at end of old crumbling paved road. 1524 Comment
  CAS-BOT-BC140658  Chrysothamnus humilis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50663 Lassen Summit ridge of Diamond Mt. 2346 Comment
  RSA79230  Chrysothamnus nauseosus subsp. albicaulis E. K. Balls, Percy C. Everett 1952-10-10 18135 Lassen 4 miles east of Susan River Bridge, Hwy. 36 1372 Comment
  UCR268964  Chrysothamnus viscidiflorus subsp. puberulus Jim Andre 2013-7-12 31420 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  CHSC65296  Chrysothamnus viscidiflorus subsp. viscidiflorus Vernon H. Oswald 1995-8-14 7183 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. Roadside. 1645 Comment
  SEINET5727103 Image available Chrysothamnus viscidiflorus subsp. viscidiflorus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7713 Lassen Collected along Forest Road 37N11, off CA Hwy 139.; Modoc National Forest 1555 Comment
  UC747217  Chrysothamnus viscidiflorus subsp. viscidiflorus G. Thomas Robbins 1945-10-7 2154 Lassen 2 to 3 mi ne of Burgess Spring in Harvey Valley (se slope of Harvey Mt.); Lassen National Forest, Harvey Mt. 1828 Comment
  UC725393  Chylismia claviformis subsp. cruciformis A. A. Heller 1938-6-23 15211 Lassen US Hwy 395 about midway between Mapes and Secret Valley 1371 Comment
  CDA38207  Cicuta douglasii T. C. Fuller 1965-8-26 14041 Lassen North side of old highway to Johnstonville, 5 miles east of Susanville. 0 Comment
  UCD159568  Cirsium D. S. Park 2011-6-27 305 Lassen Near Antelope Mt. 1999 Comment
  JEPS128416  Cirsium andersonii Catherine Bauer with Ellen Bauer Benson 2017-8-16 23 Lassen South of Highway 44, North of Butte Lake, at Butte Creek Campground. Santa Clara Valley, National Forest Service, National Forest Campground. Comment
  UCD159574  Cirsium arvense D. S. Park 2011-6-27 311 -1 Lassen East of Westwood. Growing near Willard Creek. Comment
  CDA1128  Cirsium canescens G. D. Barbe 1982-7-13 3881 Lassen Madeline Plain Scattered along Westside Rd. at base of Dry Valley Ridge, 3 mi. n. of Termo- Grasshopper Rd. 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
  CDA1172  Cirsium cymosum T. C. Fuller 1963-7-16 10921 -C Lassen West of Hwy 395; 14.3 miles south of Ravendale. 0 Comment
  CAS-BOT-BC278002  Cirsium cymosum Peter H. Raven; Otto T. Solbrig 1958-6-17 13279 Lassen Along United States Highway 395, 13.1 miles south of Ravendale Comment
  JEPS30797  Cirsium cymosum var. cymosum Peter H. Raven and Otto T. Solbrig 1958-6-17 13303 Lassen along US Hwy 395 8.0 mi n Madeline Comment
  JEPS30609  Cirsium douglasii var. breweri Peter H. Raven and Otto T. Solbrig 1958-6-17 13280 Lassen 13.1 mi s Ravendale (along U.S. Highway 395) Comment
  CAS-BOT-BC280057  Cirsium neomexicanum T. C. Fuller 1980-8-5 20312 Lassen 0.4 km. east of the campground, east shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  UC1587096  Cirsium occidentale var. candidissimum G. Schoolcraft 1991-7-30 2201 Lassen s of Widow Mt. (along Rock Canyon Rd.) 1310 Comment
  CAS-BOT-BC285517  Cirsium occidentale var. candidissimum Blanche Clear 1940-7-30 s.n. Lassen Between Manzanita Lake and Burney Falls. On highway Comment
  CAS-BOT-BC280421  Cirsium ochrocentrum T. C. Fuller 1980-8-5 20311 Lassen East shore of Dodge Reservoir, 28 km. (17.5 mi.) northeast of Ravendale Comment
  CAS-BOT-BC280440  Cirsium ochrocentrum T. C. Fuller 1966-7-22 14983 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
  CDA37705  Cirsium ochrocentrum Robin Breckenridge 2006-8-15 s.n. Lassen Madeline Plains, Westside Road, old Basque homestead. 0 Comment
  JEPS59259  Cirsium scariosum Brown and Wieslander 1922-7-23 91 Lassen Martin Sprs. Eagle Lake, Martin Sprs. Comment
  CDA37717  Cirsium undulatum Breckenridge/Mitchell 2007-7-11 s.n. Lassen Madeline Plains, along Westside Road, from historic Basque homestead. 0 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-BC163420  Clarkia purpurea subsp. quadrivulnera Louella Bass 1978-7-11 78 -12 Lassen Elysian Valley 1325 Comment
  CHSC59759  Clarkia rhomboidea Mary Meyer 1980-8-5 Lassen 2148 Comment
  UC1537615  Clarkia rhomboidea Gordon H. True Jr. 1936-6-26 549 Lassen 2 mi e Eagle Lake (head of creek); Willow Creek 1584 Comment
  HSC63829  Clarkia stellata Teresa Prendusi 1980-7-1 Lassen McCoy Flat, 5 mi. E of northern tip of Eagle Lake 1646 Comment
  CHSC106577  Claytonia rubra subsp. depressa C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  CHSC112426  Claytonia rubra subsp. depressa Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18742 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
  UC1136745  Claytonia rubra subsp. rubra A. Simontacchi 1940-5-13 700 Lassen 7.8 mi wsw Cone Ranch Heights; Lassen National Forest, Halls Flat Quad. 1920 Comment
  RSA0039348  Cleome John F. Emmel 1993-7-29 1282 Lassen Honey Lake Valley; ca. 2 air miles NW of Wendel. 1228 Comment
  CHSC64778  Cleome platycarpa Vernon H. Oswald 1995-5-31 6805 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.6 mi e of Hwy. 395, between Litchfield and Ravendale. 1371 Comment
  CAS-BOT-BC423197  Cleomella parviflora Arnold Tiehm 1980-5-29 5748 Lassen North end of Honey Lake Valley, just north of Hot Springs 1.1 air miles NNW of Wendel 1231 Comment
  JEPS42688  Cleomella parviflora J. Burtt Davy Jun 17 1897-Jun 24 1897 3352 Lassen Amedee Honey Lake Vally Comment
  CAS-BOT-BC423222  Cleomella plocasperma Luella Bass 1980-6-16 s.n. Lassen Wendel 1221 Comment
  HSC68800  Collinsia grandiflora Gary Schoolcraft 1980-7-15 312 Lassen N ende of Nelson Corral Reservoir 1805 Comment
  CHSC112413  Collinsia parviflora Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18737 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
  CHSC91181  Collinsia parviflora Lowell Ahart; John Dittes 2005-6-1 11858 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1448 Comment
  RSA0117250  Collinsia parviflora L. Ahart, John Dittes 2005-6-1 11858 Lassen On the west side of the poor dirt road, about 1/2 mile west of Scott Road, Long Valley, About 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction. 1449 Comment
  UC1023722  Collinsia parviflora Francis W. Pennell 1940-6-9 25752 Lassen 7 mi n of Madeline (Route 395); Route 395 1615 Comment
  HSC63776  Collinsia parviflora Teresa Prendusi 1980-4-30 Lassen Shaffer Mtn., 2 mi. W of Hwy. 395 and 28 mi. S of Ravendale 1616 Comment
  RSA152668  Collinsia parviflora I. L. Wiggins, Dorothy Wiggins 1961-6-10 16322 Lassen Along California Highway 36 abut 6 miles W of Sussanville. Comment
  CHSC106085  Collomia grandiflora Lowell Ahart; John Dittes 2010-7-31 17002 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  CHSC30572  Collomia grandiflora Sori H. Shad 1970-7-1 33 Lassen Found 3/4 mile past Murrer's. Meadow near edge of road. 1524 Comment
  CHSC4774  Collomia grandiflora R. Carter 1967-6-27 565 Lassen Ca. 10 yds off S side of Rd. 1.75 mi W of Eagle Lake Biology Station. 1584 Comment
  JEPS117587  Collomia grandiflora Lowell Ahart, John Dittes 2010-7-31 17002 Lassen On the north side of the road, about 10 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin 1516 Comment
  HSC16917  Collomia grandiflora Jim Vaughn 1956-7-25 Lassen Drakesbad 1738 Comment
  SEINET12318331  Collomia grandiflora Unknown 1978-1 22 Lassen Lower Dry Lakes,SE of Eagle L 1646 Comment
  SEINET12319536  Collomia grandiflora N. E. Heiken 1978-1 87 Lassen Lower Dry Lakes, E of Eagle L 1573 Comment
  UC23683  Collomia linearis M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CHSC60835  Collomia tinctoria Vernon H. Oswald; Lowell Ahart 1993-6-28 5597 Lassen Harvey Valley Rd. (33N02), 2.0 mi N of Hwy 44, between Grays Valley and Harvey Valley, E of Poison Lake. Along the edge of the road. 1734 Comment
  UC1123658  Collomia tinctoria A. Simontacchi 1940-5-28 778 Lassen 3.2 mi wsw Patterson Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1567424  Comandra umbellata subsp. californica G. Schoolcraft 1989-6-7 1908 Lassen Shaffer Mountain near top Shaffer Mountain 2011 Comment
  HSC95333  Comarum palustre Gordon Leppig, Tony LaBanca 1997-6-29 525 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SEINET11242313  Conringia orientalis N. H. Holmgren, P. K. Holmgren 1980-1 9471 Lassen Madeline Plains, a valley road 1.1 km (0.7 miles) W of Hwy 395, from a turnoff 10.3 km (6.4 miles) S of Madeline. 1620 Comment
  SEINET248374  Conringia orientalis Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 9471 Lassen Madeline Plains, a valley road, 1.1 km (0.7 mi) west of U.S. Highway 395 form a turnoff 10.3 km (6.4 mi) south of Madeline. 1620 Comment
  JEPS121058 Image available Convolvulus occidentalis subsp. occidentalis Lynne C. Carter 1967-7-12 92 Lassen 6 miles east of Lassen + Shasta County line on Hwy 299, at Lookout over Fall River Valley. Comment
  CAS-BOT-BC286113  Conyza canadensis John Thomas Howell 1974-7-10 50532 Lassen Elysian Valley 1325 Comment
  JEPS57534  Cordylanthus maritimus subsp. canescens Harry George 1963-8-15 Lassen shores of Honey Lake Comment
  JEPS74351  Cordylanthus maritimus subsp. canescens L. R. Heckard, T. I. Chuang and R. Bacigalupi 1974-7-25 3769 Lassen 4.6 mi n U. S. 395 (along County route A-3 (near old school house, several mi w of Honey Lake); Honey Lake 1219 Comment
  UC762620  Cordylanthus ramosus R. F. Hoover 1940-10-5 4678 Lassen Secret Valley Comment
  CHSC117526  Crassula aquatica Lowell Ahart; John Dittes 2016-7-13 21117 Lassen Strand of the pond, near where drainage enters pond, 150 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC5205  Crepis acuminata A. Santos 1946-6-10 Lassen Eagle Lake. Near Pelican Island. 1554 Comment
  CHSC83603  Crepis acuminata L. P. Janeway 2001-6-28 7234 Lassen High Cascade Range. Southwest flank of Cone Mountain, 0.5 km southwest of the summit; along Road 33N41Y 0.5 km southeast of Road 33N41YD. 1955 Comment
  POM17703  Crepis acuminata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC1136839  Crepis acuminata George A. Fischer and Irwin H. Johnson 1933-7-14 F- 266 Lassen Lassen <National> Forest 1752 Comment
  CHSC118479  Crepis acuminata Don Lepley 2016-6-21 Lassen Lassen National Forest. Hat Creek Ranger District. Flat west of Blacks Mt., 0.2 mile west of junction of Roads 34N07 and 34N05Y. UTM 648055.1 E x 4515134.8N. 1726 Comment
  POM230908  Crepis intermedia G. Ledyard Stebbins, J. A. Jenkins 1937-7-10 2296 Lassen Crest of range head of Stony Ridge, west of Milford 1951 Comment
  UC581206  Crepis intermedia G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2315 Lassen sw-facing slope about a mi below summit; Black Mountain 1940 Comment
  UC773981  Crepis intermedia L. R. Short 1935-7-9 S- 509 B Lassen Burgess Spring Experiment Range 1818 Comment
  UC91874  Crepis intermedia T. S. Brandegee 1892-7-26 Lassen near Honey Lake; Milford Comment
  UC581270  Crepis modocensis subsp. subacaulis G. L. Stebbins Jr. and J. A. Jenkins 1937-7-10 2276 Lassen Diamond Mt.; summit and e slope Comment
  UC91877  Crepis monticola T. S. Brandegee 1892-7-2 Lassen Susanville 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
  UC581317  Crepis occidentalis subsp. costata G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2218 Lassen 6 mi s Ravensdale 1676 Comment
  CAS-BOT-BC376565  Crepis occidentalis subsp. occidentalis B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6566 Lassen U.S. Hwy 395 1.3 km S of railroad crossing and 12.9 km N of Litchfield 1330 Comment
  CHSC118853  Crepis occidentalis subsp. occidentalis L. P. Janeway; B. Castro 2015-6-5 11775 Lassen Greast Basin, Modoc Plateau. Along Tuledad Road (County Road 506) 13.0 road-km south of the junction at the west end of Tuledad Canyon; 6.8 road-km north of Stage Road (which is in the eastern corner of Madeline Plains); west side of a northeasten branch of Red Rock Creek. 1695 Comment
  CDA4443  Crepis occidentalis subsp. pumila E. E. Fix 1956-6-18 Lassen Termo. 0 Comment
  CHSC5206  Crepis pleurocarpa 1944-6-28 Lassen Eagle Lake. 1584 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
  UCD59991  Crypsis vaginiflora R. Tofsrud 1947-7-1 246 Lassen Between Bieber and Nubieber. Comment
  CAS-BOT-BC189240  Cryptantha John Thomas Howell 1977-6-22 52403 Lassen N end of Eagle Lake 1584 Comment
  UC1137644  Cryptantha affinis A. Simontacchi 1940-5-28 776 Lassen 3.2 mi wsw Patterson Mt.; Lassen National Forest, Halls Flat Quad. 1767 Comment
  SBBG6231  Cryptantha affinis H. and M. Dearing 1938-6-30 2226 Lassen ca. 50 mi W of Susanville Comment
  CHSC106071  Cryptantha ambigua Lowell Ahart; John Dittes 2010-7-31 17023 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
  RSA0059645  Cryptantha ambigua Richard R. Halse 2004-8-8 6616 Lassen Along State Highway 139 ca. 6 miles north of Eagle Lake. 1710 Comment
  SDSU20522  Cryptantha ambigua Nuri Benet-Pierce, John P. Pierce 2012-7-14 522 Lassen Between Poison Lake and Patterson Flats, in clearing by the rd, at the start to 35N08. 1724 Comment
  SEINET8518912  Cryptantha ambigua R. R. Halse 2004-7-8 6616 Lassen Along State Highway 139, ca 6 miles N of Eagle Lake. 1710 Comment
  UCD119054  Cryptantha ambigua Robbins; Raynor 1943-6-1 s.n. Lassen Madeline. Comment
  POM368344  Cryptantha circumscissa Christopher Davidson 1975-6-7 2761 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  CAS-BOT-BC189459  Cryptantha circumscissa var. circumscissa Elmer I. Applegate 1934-5-4 8933 Lassen Secret Valley, 20 miles S of Ravendale Comment
  SJSU11363  Cryptantha glomeriflora J. W. Tilden 1960-6-27 1494 Lassen Westwood 1524 Comment
  SEINET8545993  Cryptantha intermedia var. grandiflora J. A. Young 1978-4-13 s.n. Lassen Adin, Meyers Ranch. Comment
  JEPS124572 Image available Cryptantha intermedia var. grandiflora S. Hardinghaus 1967-7-11 167715 -114 Lassen 6 mi. S. of Eagle Lake where meets Hw 139 at west shore, on Hwy 139. Comment
  SEINET8545983  Cryptantha intermedia var. grandiflora J. A. Young 1982-6-7 s.n. Lassen Redlands. 1676 Comment
  POM72585  Cryptantha torreyana Marcus E. Jones 1897-6-25 7102 Lassen Susanville. 1341 Comment
  CHSC110773  Cuscuta howelliana Dean Wm. Taylor 2012-7-18 21275 Lassen Windmill Flat (tributary Juniper Creek, Pit River watershed, 11 miles S of Aden). 1706 Comment
  SEINET248370  Cusickiella douglasii Noel H. Holmgren, Patricia K. Holmgren 1978-6-11 8926 Lassen Upper Smoke Creek, southeast side of Observation Peak, 11.3 km (7 mi) northeast of Rye Patch Canyon summit, 21 km (13 mi) air distance east-southeast of Ravendale. 1700 Comment
  CHSC60296  Cymopterus terebinthinus var. californicus Mary Ann Showers 1992-6-13 2560 Lassen Lassen Volcanic National Park. Volcanic outcrops southwest of Widow Lake. 2072 Comment
  UC1567429  Cyperus squarrosus G. Schoolcraft 1989-7-24 1994 Lassen along n. shore Said Valley Reservoir 1630 Comment
  CAS-BOT-BC208394  Dalea ornata Arnold Tiehm; Raymond Evans; James Young 8592 Lassen Flats on the northwest side of Shaffe Mountain, 7.5 air miles north-northwest if Litchfield 1371 Comment
  RSA324194  Dalea ornata A. Tiehm, Raymond Evans, James Young 1984-6-7 8592 Lassen Flats n the northwest side of Shaffer Mountain. 7.5 airmiles NNW of Litchfield. 1372 Comment
  CHSC5924  Damasonium californicum P. Balch 1955-6-25 Lassen Pine Creek, Eagle Lake. 1584 Comment
  JEPS32207  Damasonium californicum J. B. Davy Jun 17 1897-Jun 24 1897 3335 Lassen Honey Lake Valley, Susan R. 1219 Comment
  UC1100148  Damasonium californicum Herbert L. Mason, Malcolm A. Nobs, and S. Galen Smith 1949-5-29 755 Lassen on Great Northern R.R. <Nubeiber> (Hwy. 299) Comment
  JEPS124716 Image available Damasonium californicum B. Corwin 1964-7-1 123 Lassen Under bridges between Bieber and New Bieber on rte. 299. Comment
  POM260301  Damasonium californicum C. L. Hitchcock 1940-5-26 6646 Lassen Overflow of Pitt River, 1 mile W of Bieber Comment
  SEINET6188248  Damasonium californicum R. F. Thorne, Larry E. De Buhr 1975-1 46995 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 iles south of Modoc county line. 1615 Comment
  UCD138002  Damasonium californicum Calvin McMillan; Malcom A. Nobs 1949-6-15 784 Lassen Nubieber. Comment
  CAS-BOT-BC189863  Danthonia californica John Thomas Howell; Gordon H. True; 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
  CAS-BOT-BC192329  Danthonia unispicata Ralph K. Gierisch 1968-7-11 3353 Lassen Lassen National Forest. Harvey Valley - Dixie Spr. 1706 Comment
  RSA299133  Danthonia unispicata J. T. Howell 1977-6-22 52406 Lassen west of Susanville near the confluence of Willard Creek and Susan River 1433 Comment
  UC1567411  Deinandra lobbii G. Schoolcraft 1989-7-24 1997 Lassen w Hayden Hill Mine (along road); Susanville 1737 Comment
  SD51285  Deinandra lobbii Darley F. Howe 1961-8-4 3135 Lassen 11.5 miles east of McArthur on U. S. Highway 299. Comment
  CAS-BOT-BC1416  Delphinium andersonii L. B. Barlow 1967-6-23 1 Lassen Eagle Lake Biological Station, east central side of Eagle Lake 1554 Comment
  CHSC7730  Delphinium andersonii Beverley J. Wise 1969-5-18 83 Lassen 7.7 mi. West of Susanville on Las. Co. Rd. 215 on the south side of the road. 1341 Comment
  UC1583981  Delphinium andersonii G. Schoolcraft 1990-6-12 2090 Lassen about 17 mi e Ravendale; Pine Dunes RNA 1706 Comment
  UC9127  Delphinium andersonii Mrs. C. C. Bruce June 1898 2238 Lassen Shumway Comment
  UC1184063  Delphinium depauperatum Jean Langenheim 1957-6-26 4391 Lassen areas adjacent to 1937 chaparral quadrat (nw <part of> valley, ne part of Lassen Co.); Said Valley Comment
  UC1609175  Delphinium depauperatum Vernon H. Oswald and Lowell Ahart 1993-6-28 5601 Lassen Rd. 35NO4 at Aspen Well (n of Hwy 44 on nw edge of valley, ne of Poison Lake); Harvey Valley 1725 Comment
  CDA24233  Delphinium depauperatum T. C. Fuller 1963-6-1 10636 Lassen Road east to Willow Springs Campground, 1.9 miles east of Pittville-Susanville Road, 11.2 road miles south of Pittville. 0 Comment
  CAS-BOT-BC217303  Delphinium nudicaule Elmer Ivan Applegate 1935-6-10 9478 a Lassen Lava Beds National Monument. S base of Caldwell Butte. Comment
  CAS-BOT-BC116045  Delphinium nuttallianum Doris Kildale Gillespie 1930-5-14 9380 Lassen Fredonia Pass near Susanville. Comment
  HSC27052  Delphinium nuttallianum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19165 Lassen 3 mi. N of Westwood Comment
  POM100692  Delphinium nuttallianum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt., Susanville, Perkin's Ranch. 2226 Comment
  OBI75897  Deschampsia cespitosa Anthony Baniaga 2011-8-17 508 Lassen Lassen Natl Forest. Along Silver Lake Rd (32N10) W of 31N08. Red Cinder Quad T31N R8E sec 31 SW of SW 1978 Comment
  CAS-BOT-BC194257  Deschampsia cespitosa subsp. cespitosa John Thomas Howell 1934-7-9 12517 Lassen Bridges Creek Spring Comment
  JEPS28309  Deschampsia cespitosa subsp. cespitosa George W. Gillett 1957-8-9 1008 Lassen E. Fork of Hat Creek near Summit Lake Ranger Station; Lassen Volcanic Nat'l Park, E. Fork Hat Creek 2026 Comment
  CAS-BOT-BC192744  Deschampsia danthonioides Ira L. Wiggins; Dorothy B. Wiggins 1961-6-10 16328 Lassen Along southern shore of Eagle Lake Comment
  HSC100183  Deschampsia danthonioides J. P. Smith, J. O. Sawyer 2011-8-15 13379 Lassen Along Hwy. 36 at the intersection with the Bizz Johnson Trailhead Road. Comment
  JEPS114873  Deschampsia danthonioides Lowell Ahart, John Dittes 2008-6-20 14926 Lassen Vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  UC1483828  Deschampsia danthonioides G. Schoolcraft 1980-7-28 331 Lassen meadow area e. of Tule Mt. 2042 Comment
  UC53584  Deschampsia danthonioides M. S. Baker and Frank Nutting 1894-7-2 Lassen w. side Dixey Mts. Dixey Mts. Comment
  CAS-BOT-BC192746  Deschampsia danthonioides Clarence R. Quick 1962-6-17 62 25 A Lassen Swains Hole, a manmade pond in sagebrush flat south of Blacks Experimental Station 1554 Comment
  JEPS28059  Deschampsia elongata George W. Gillett 1957-7-28 935 Lassen Widow Lake 2072 Comment
  CHSC7706  Descurainia incana Beverley J. Wise 1969-4-29 38 Lassen 3.4 mi. north of Susanville on Rnd Valley Rd off Hwy 139. 1371 Comment
  CHSC99147  Descurainia nelsonii Lowell Ahart; John Dittes 2008-6-19 14891 Lassen Bottom and sides of a small drainage, west bank of Willow Creek, about 5 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  SEINET10480969  Descurainia pinnata Jeffrey Huber 1971-6-2 Huber 134 Lassen 6 mi n of halleluja jct on u.s. Hwy 395, in artemesia tridentata, pinyon pine, jeffrey pine along high ridge and in sandy wash. 1402 Comment
  CAS-BOT-BC43167  Descurainia pinnata subsp. brachycarpa Doris Kildale Gillespie 1930-5-12 9325 Lassen 2 miles north of Susanville on road to Alturas. Comment
  CHSC13943  Descurainia sophia M. S. Taylor 1974-6-20 258 Lassen Ca. 100 yds ne of Eagle Lake Field Station, ca. 1 ft e of Whitehead Rd, ca. 13 mi nw of Susanville. 1524 Comment
  CHSC7705  Descurainia sophia Beverley J. Wise 1969-5-23 39 Lassen 35 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 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-BC500986  Dichelostemma multiflorum H. D. Ripley; R. C. Barneby 1943-6-14 5750 Lassen West of Susanville 1310 Comment
  UC223695  Dieteria canescens var. canescens Elmer I. Applegate 1923-9-30 4031 Lassen Doyle Money Lake Valley Comment
  UCSB25961  Dieteria canescens var. shastensis Wilken, Dieter; Haller, John; Langford, A. 1968-9-12 Lassen Along California Highway 36, 11.2 miles east of Chester 1524 Comment
  CAS-BOT-BC209003  Digitaria sanguinalis John Thomas Howell 1976-7-19 51941 Lassen Susanville - Sierra Nevada 1296 Comment
  HSC63968  Dimeresia howellii Teresa Prendusi 1980-7-14 Lassen Ash Valley; along Ash Valley Rd. 15 mi. W of Madeline 1524 Comment
  CHSC4832  Diplacus jepsonii R. Carter 1967-7-14 602 Lassen Growing on n side of rd. ca. 3.5 mi e of Silver Lake between rd (31N07) and Susan River. 1828 Comment
  CAS-BOT-BC153677  Diplacus mephiticus A. A. Heller; P. B. Kennedy 1907-7-1 8672 Lassen Near Old Chat Comment
  CAS-BOT-BC153683  Diplacus mephiticus Mike Vasey 1990-6-30 9050 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CHSC25121  Diplacus mephiticus William R. Lessig 1967-6-24 6 Lassen Collected ca. 200 yds. N. E. of Eagle Lake Biological Station. 1524 Comment
  CHSC5907  Diplacus mephiticus R. Gein 1946-6-12 Lassen Pine Creek bridge. 1584 Comment
  SBBG22269  Diplacus mephiticus C. B. Hardham 1961-6-16 Lassen Gold Run Crk, S of Susanville Comment
  UCD64607  Distichlis spicata var. stricta Malcolm A. Nobs; S. Galen Smith 1949-7-22 1069 Lassen NE shore of Eagle Lake. Comment
  UCD64624  Distichlis spicata var. stricta Verne Grant; Irving Schneider 1947-9-5 8377 Lassen Northwest shore of Eagle Lake by Sam Webb's place (Spaulding). Comment
  CHSC36491  Dodecatheon alpinum Theresa Costa 1982-6-4 35 Lassen Murrers Upper Meadow. Comment
  CHSC4780  Dodecatheon alpinum R. Carter 1967-6-27 567 Lassen Found in Murrer's upper Meadow 100 yds. S of small dam. 1584 Comment
  POM76750  Dodecatheon alpinum subsp. majus Marcus E. Jones 1897-6-30 s.n. Lassen Susanville, 4 miles below Eagle Lake. 1524 Comment
  RSA768782  Downingia bacigalupii L. Ahart, John Dittes 2010-7-31 17013 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
  UC1523717  Downingia bacigalupii Gregg Riegel 1981-6-17 1150 Lassen 1280 Comment
  POM68157  Downingia bacigalupii Marcus E. Jones 1897-6-22 s.n. Lassen 10 miles south of Amedee. [Lassen or Plumas Co.] 1220 Comment
  SEINET12329644  Downingia bacigalupii N. H. Holmgren, Holmgren, P. K. 1980-1 9472 Lassen Madeline Plains, a valley road 1.1 km (0.7 mi) W of US Highway 395 from a turnoff 10.3 km 1615 Comment
  CHSC27657  Downingia bicornuta N. E. Heiken 1978-7-27 92 Lassen N of Antelope Valley, w of Eagle Lake, pond in pasture. 1677 Comment
  POM68179  Downingia bicornuta Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  CHSC99106  Downingia bicornuta var. bicornuta Lowell Ahart; John Dittes 2008-6-20 14945 Lassen In vernal pools and swales, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  JEPS87497  Downingia bicornuta var. bicornuta Vernon H. Oswald and Lowell Ahart 1993-7-8 5649 Lassen on s.e. edge Poison Lake (Pittville Rd. (Lassen 111, 36N01) 1.9 mi. n. of Hwy. 44, e. side of R.R., which parallels the lake shore at this point) 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
  UCD58787  Downingia elegans Daniel B. Marcum 2007-7-25 s.n. Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  CHSC65303  Downingia insignis Vernon H. Oswald; Lowell Ahart 1995-8-14 7184 Lassen Modoc Plateau. Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy. 395, N of Susanville. 1645 Comment
  UC1924242  Downingia insignis Debra Valov 2004-6-8 2004242 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CAS-BOT-BC266472  Downingia laeta Wm. Anderson 1960-6-16 s.n. Lassen Along county road 0.25 mile S of Mapes Ranch, Honey Lake Valley Comment
  JEPS24763  Downingia laeta John H. Weiler, L. Constance, E. Molseed 1960-6-13 60164 Lassen 1.7 mi. s. Ravendale (w. side of U.S. 395) 1615 Comment
  UC1188737  Downingia laeta John H. Weiler, L. Constance, and E. Molseed 1960-6-13 60164 Lassen 1.7 mi s Ravendale (at w side of U.S. Hwy 395) 1615 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
  OBI78908  Draba verna Anthony Baniaga 2011-6-7 313 Lassen Lassen National Forest. Northwest area of Grays Valley, just South of intersection of 33N11 and 32N83Y. Poison Lake quadrangle. 1747 Comment
  UC1951080  Draba verna Debra Valov 2009-4-24 2009011 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  SEINET5342791  Draba verna J. Young 1978-4-13 s.n. Lassen Meyers Ranch, Adin, CA. Comment
  JEPS118282  Draba verna var. aestivalis Lowell Ahart, John Dittes 2011-6-20 17489 Lassen About 3 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
  CAS-BOT-BC159341  Drymocallis lactea var. lactea Marcus E. Jones 1897-6-28 s.n. Lassen Perkin's Ranch, Diamond Mt., Susanville 2133 Comment
  CHSC23710  Drymocallis lactea var. lactea Robert Smallwood 1970-6-27 129 Lassen North edge of Dean's Meadow. Comment
  CHSC76099  Elaeagnus angustifolia Lowell Ahart; Vernon H. Oswald 1999-9-13 8223 Lassen On the north side of Mapes Road, about 1/2 mile east of Lambert Lane, about 3-1/2 miles (air) southeast of Standish. 1210 Comment
  JEPS95911  Elaeagnus angustifolia Lowell Ahart 1999-9-13 8223 Lassen on the north side of Mapes Road; about 1/2 mile east of Lambert Lane; about 3 1/2 miles (air) southeast of Standish 1210 Comment
  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
  SEINET9342679  Elatine californica Robert Thorne, DeBuhr, Larry 1975-8-22 47212 Lassen Lassen County Comment
  CHSC60975  Elatine chilensis Lowell Ahart 1993-5-17 6954 Lassen On the west side of Dunstone Road, about 1-1/2 miles north and 3 miles east of Honcut, about 12 miles south-east of Oroville. Comment
  CHSC60449  Eleocharis acicularis var. acicularis Mary Ann Showers 1992-6-13 2548 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  CDA7765  Eleocharis acicularis var. acicularis G. Schoolcraft 1995-5-22 s.n. Lassen Morgan Spring N of Skedaddle Mtns. Comment
  CHSC117180  Eleocharis bella Lowell Ahart; John Dittes 2016-6-7 21015 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
  JEPS88513  Eleocharis bella Vernon H. Oswald and Lowell Ahart 1996-6-24 7851 Lassen Papoose Meadows Modoc Plateau (ca 0.5 mi e of Eagle Lake Rd (A1) and 2.5 mi s of Eagle Lake, at pile of fenceposts on w side of meadow just s of cabins) 1633 Comment
  UCD55301  Eleocharis macrostachya Ellen Dean; Gary Schoolcraft 2006-5-16 3130 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1251 Comment
  RSA127038  Eleocharis quinqueflora Robert W. Gardner 1939-6-15 G- 36 Lassen Little Harvey Valley 1700 Comment
  SEINET10565243  Elymus Paul Gallian, David B. Dunn 1971-6-2 Gallian 512 Lassen 6 mi of Hallelujah Jct. on US hwy 395, in Artemisia tridentata, Pinyon pine, Jeffery pine along high ridge and in sandy wash. 1402 Comment
  HSC10943  Elymus X hansenii M. T. Milligan 1964-8-6 210 Lassen Eagle Lake, near shore at Eagle Lake General Store. 1677 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
  JEPS120873  Elymus caput-medusae Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18749 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SD71040  Elymus caput-medusae Leo E. Wheeler 1960-6-15 Lassen edge of valley plain, ca. 4 mi. se. of Susanville Comment
  CHSC115611  Elymus cinereus Lowell Ahart; John Dittes 2015-7-14 20327 Lassen On the north side of the road along Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1271 Comment
  CHSC67076  Elymus cinereus Willis Ball 1969-6-25 39 Lassen Found in Upper Murrer's Mdw. 1584 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
  CAS-BOT-BC227482  Elymus elymoides John Thomas Howell; Gordon H. True 1973-8-1 50197 Lassen Ca. 3 miles se. of Diamond Mt., summit of Diamond Range south of Susanville 2194 Comment
  CAS-BOT-BC227490  Elymus elymoides Gary Schoolcraft 1983-6-29 1053 Lassen Ash Valley 1554 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
  UC1024794  Elymus elymoides subsp. elymoides Leo Whitney 1933-7-15 2229 Lassen ca 25 mi w upper end of Eagle Lake; Lassen National Forest, Hall's Flat 1737 Comment
  UC1024958  Elymus elymoides subsp. elymoides Leo Whitney 1935-6-24 3304 Lassen ca 13 mi w north end of Eagle Lake; Squaw Valley Comment
  UC773975  Elymus elymoides subsp. elymoides L. R. Short and Wm. Gansberg 1936-7-9 S- 477 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1783 Comment
  UC773976  Elymus elymoides subsp. elymoides L. R. Short and J. Warren 1936-6-29 S- 461 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1820 Comment
  JEPS126480  Elymus elymoides var. californicus Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-15 CA 350 -044 Lassen Throughout reservoir along right side of Horse Road when traveling North. 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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Aug 1 2007
  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
  CHSC111248  Elymus spicatus B. Castro; L. P. Janeway 2012-7-3 1938 Lassen Modoc Plateau. 16 air mi ENE of Susanville, and 0.35 mi W of Hwy 395, along road up to Shaffer Mountain. 1417 Comment
  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
  JEPS68378  Elymus trachycaulus Brown and Wieslander 1922-7-23 74 Lassen Martin Springs Comment
  UC1136823  Elymus trachycaulus George A. Fischer and Irwin H. Johnson 1933-7-12 F 233 Lassen Patterson Flat Lassen <National> Forest 1737 Comment
  UC70687  Elymus trachycaulus J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  JEPS107397  Elymus trachycaulus subsp. subsecundus Lowell Ahart, John Dittes 2005-6-1 11880 Lassen Near springs on a small hill, about 3/4 mile west of Scott Road, Long Valley, about 2 miles (air) northwest of the intersection of Scott Road and Highway 70, 3.9 miles (air) northwest of Hallelujah Junction 1470 Comment
  UCD62694  Elymus trachycaulus subsp. trachycaulus August L. Hormay 1932-7-1 Lassen Lassen National Forest. Bogard Ranger Station. Comment
  SEINET3129054  Elymus triticoides J. B. Davy 1897-1 sn Lassen Honey Lake Valley. Comment
  CDA2066  Elytrigia repens H. S. Milton, P. Milton Jul 1980 Lassen Herman S. & Paul Milton Ranch, Riverside District, Hwy 395, 8 miles east of Susanville. 0 Comment
  CHSC36463  Ephedra viridis Jeffrey R Peak 1982-6-1 24 Lassen Ca. 18 mi e jct Hwy 139 and Ravendale Rd. Comment
  CHSC36500  Ephedra viridis Theresa Costa 1982-6-2 26 Lassen Ca. 18 mi e jct Hwy 139 and Ravendale Rd, ca. 1.5 yds w Ravendale Rd. Comment
  RSA245293  Ephedra viridis D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19306 Lassen Along Hwy 395 about 4 miles E of Standish Comment
  CHSC30566  Ephedra viridis Sori H. Shad 1970-7-10 23 Lassen Found along road 4.11, 9 miles east intersection with Hwy 139. 2286 Comment
  SEINET11739305  Ephedra viridis M. Sacks, Detzer 1977-1 13 Lassen 4 km S of Hwy 395 1386 Comment
  NY999879  Epilobium brachycarpum W. W. Eggleston 1910-9-3 6309 Lassen Vicinity of Doyle Station 1240 Comment
  UC1594621  Epilobium campestre Vernon H. Oswald and Lowell Ahart 1992-7-16 5110 Lassen between Old Station and Susanville (s side of Hwy 44); McCoy Flat Reservoir, Bridge Creek 1691 Comment
  CHSC6190  Epilobium ciliatum subsp. ciliatum P. Balch 1955-7-24 Lassen Gallatin's Beach, Eagle Lake. 1561 Comment
  UC20216  Epilobium ciliatum subsp. ciliatum M. S. Baker and Frank Nutting 1894-7-25 Lassen Willow Creek Comment
  JEPS114690  Epilobium ciliatum subsp. glandulosum Lowell Ahart, John Dittes 2008-6-20 14948 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
  NY1001473  Epilobium ciliatum var. ciliatum V. E. Grant 1947-9-6 8388 Lassen Irrigation ditch west of Fleming Ranch headquarters, near Wendel Comment
  NY1000270  Epilobium densiflorum G. Schoolcraft 1982-8-18 893 Lassen West of Doyle 1585 Comment
  UC773935  Epilobium hallianum L. R. Short and J. Warren 1936-6-11 S- 429 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1737 Comment
  CHSC61052  Epilobium oregonense Vernon H. Oswald; Lowell Ahart 1993-8-3 5741 Lassen Cooper Swamp located E of Silver Lake just E of the Caribou Wilderness, ca. 13 mi (air) N of Lake Almanor. 1932 Comment
  CHSC77220  Epilobium oregonense G. Schoolcraft 1993-7-20 2330 Lassen About 1 mile s. of Boot Lake. Along creek. 1950 Comment
  HSC95313  Epilobium oregonense Gordon Leppig, Juli Neander, Kai Neander 1997-7-26 688 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  SJSU10675  Epilobium oregonense J. W. Tilden 1960-6-27 1517 Lassen 5 mi E of Westwood on Moonlight Rd 1524 Comment
  UC726203  Epilobium pallidum A. A. Heller 1941-6-26 16233 Lassen on ridge w Nieubieber Comment
  CHSC96704  Epilobium palustre Gordon Leppig; T. LaBanca, L. Arguello 1997-6-29 538 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  RSA512825  Epilobium paniculatum J. T. Howell, Gordon H. True 1973-7-31 50028 Lassen Sierra Nevada: On road from Janesville to Thompson Peak, Diamond Range 1738 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
  CAS-BOT-BC57976  Equisetum John Thomas Howell 1976-7-19 51994 Lassen On Gold Run Creek sw. of Susanville. Comment
  CHSC12494  Equisetum arvense Carol Weld 1969-6-26 46 Lassen 7.8 miles S. W. of Eagle Lake Field Station. 1584 Comment
  CHSC66369  Equisetum laevigatum Vernon H. Oswald; Lowell Ahart 1996-6-17 7820 Lassen Modoc Plateau. Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36 ca. 7 mi W of Susanville. At the 6.0 mile post E of Devils Corral Trailhead. 1420 Comment
  RSA0035920  Equisetum laevigatum Lowell A. Ahart, John Dittes 2008-6-20 14933 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
  UC62615  Equisetum laevigatum Baker and Nutting 1894-7-5 Lassen <Dixay> Valley 1066 Comment
  CAS-BOT-BC57301  Equisetum laevigatum Barbara Shervanick 1974-5-7 1262 Lassen Highway 395, just south of Milford, Cascade Range 1371 Comment
  CHSC77263  Eragrostis cilianensis G. Schoolcraft 1997-8-20 2700 Lassen Safeway parking lot in Susanville. 1264 Comment
  CHSC4879  Eremogone congesta R. Carter 1967-6-23 544 Lassen Growing ca. 5 yds. off N side road. Comment
  CAS-BOT-BC174203  Eremogone congesta var. congesta Louella Bass 1973-6-14 103 Lassen Elysian Valley 1325 Comment
  NY1057004  Eremogone congesta var. simulans A. J. Cronquist 1959-6-17 8463 Lassen 50 miles southeast of Susanville Comment
  RSA0057703  Eremogone congesta var. subcongesta Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CAS-BOT-BC159995  Eremothera boothii subsp. alyssoides Mrs. C. C. Bruce 1898-6-1 2139 Lassen Shumway Comment
  CAS-BOT-BC159998  Eremothera boothii subsp. alyssoides Philip A. Munz 1947-5-19 11869 Lassen 19 miles south of Ravendale, on Highway 395 1341 Comment
  CAS-BOT-BC160001  Eremothera boothii subsp. alyssoides David D. Keck; J. Clausen 1935-6-24 3741 Lassen 2 mi. S. of Ravendale 1464 Comment
  SEINET4132785  Eremothera boothii subsp. alyssoides A. Tiehm 1980-1 5754 Lassen North end of Honey Lake Valley, 2 air miles northwest of Wendel 1231 Comment
  SEINET4133353  Eremothera boothii subsp. alyssoides G. Schoolcraft 1980-5-30 247 Lassen Along road to Diaz Ranch 1359 Comment
  CHSC64796  Eremothera minor Vernon H. Oswald 1995-5-24 6766 Lassen Modoc Plateau. Wendel Rd. (Lassen 320) 5.0 mi e of Amedee Rd. at Wendel. On flat bordering the road. 1219 Comment
  CHSC100870  Eriastrum signatum L. P. Janeway 2008-8-2 9533 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Ranch Road 1.8 km west of the CA-NV line. 1349 Comment
  CHSC4897  Eriastrum signatum Bill Wilson 1967-7-4 51 Lassen Collected at Dean's Meadow, 6 mi S of Eagle Lake Biological Station. 4 mi. N of Susanville. 1950 Comment
  JEPS19760  Eriastrum signatum Rimo Bacigalupi with S. Galen Smith 1957-6-28 6008 Lassen along US Hwy 395 ne Karlo (near headwaters of Secret Creek, n of Secret Valley and w of Rye Patch Canyon) 1615 Comment
  JEPS69075  Eriastrum signatum W. L. Jepson 1918-8-2 7757 Lassen Beckwith Pass 1463 Comment
  JEPS103167  Eriastrum signatum Beth Corbin 2002-10-2 1115 Lassen Grasshopper Valley, S of Termo-Grasshopper Road. 1633 Comment
  CDA18273  Eriastrum wilcoxii G. D. Barbe 1974-8-2 1938 Lassen Long Valley; Hallelujah Junction, northwest corner of jct of US Hwy 395 and Hwy 70. 1524 Comment
  UCD149881  Eriastrum wilcoxii William Anderson 1963-6-26 s.n. Lassen Honey Lake. Comment
  CAS-BOT-BC286603  Ericameria bloomeri R. K. Gierisch; D. H. Esplin 1969-8-27 3598 Lassen Lassen National Forest Comment
  POM40990  Ericameria bloomeri Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  CAS-BOT-BC298171  Ericameria nauseosa var. oreophila C. B. Wolf 1931-9-5 2401 Lassen 0.75 mile E of Termo 1645 Comment
  CHSC76085  Ericameria nauseosa var. oreophila Lowell Ahart; Vernon H. Oswald 1999-9-13 8220 Lassen Along road, about 100 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife Area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  JEPS95709  Ericameria nauseosa var. oreophila Vernon H. Oswald and L. Ahart 1995-8-14 7181 Lassen T31N R15E NW1/4 Sec. 11, 4460 ft, Modoc Plateau, Sagebrush Scrub. Hwy. 395 9.1 mi N of Smoke Creek Ranch Rd., N of Susanville 1359 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-BC294184  Ericameria nauseosa var. speciosa Louella Bass 1973-9-4 EV 133 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC294186  Ericameria nauseosa var. speciosa John Thomas Howell; Gordon H. True 1973-8-1 50216 Lassen Headwaters of Baxter Creek, east slope of Diamond Range south of Susanville 2164 Comment
  JEPS21518  Ericameria nauseosa var. speciosa R. F. Hoover 1940-9-29 4646 Lassen pass between Shaffer Mt. and Warren Peak Comment
  UC1136974  Ericameria nauseosa var. speciosa L. R. Short 1936-9-14 S- 502 Lassen Burgess Spr. Exp. Range Lassen Forest 1761 Comment
  CAS-BOT-BC293008  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
  CHSC25084  Erigeron K. R. Stern 1967-6-24 2408 Lassen Murrer Meadow, Ca. 3 mi. SE of Eagle Lake Biological Station. 1554 Comment
  CAS-BOT-BC293526  Erigeron aphanactis var. aphanactis Margaret Williams 1974-7-27 74 -L-49 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  JEPS97423  Erigeron aphanactis var. aphanactis Vernon H. Oswald and L. Ahart 1995-6-19 6890 Lassen T30N R15E SE1/4 SE1/4 Sect. 12, 4440 ft, Modoc Plateau, Sagebrush Scrub. Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 3.6 mi e of Hwy. 395. Many-stemmed herbaceous perennial from a branching and tap-rooted caudex 1353 Comment
  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
  CAS-BOT-BC294485  Erigeron bloomeri var. bloomeri John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50676 Lassen Summit ridge of Diamond Mt. 2346 Comment
  CAS-BOT-BC294488  Erigeron bloomeri var. bloomeri John Thomas Howell 1934-7-8 12513 Lassen Harvey Valley Comment
  CHSC105254  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
  CHSC68843  Erigeron bloomeri var. bloomeri Vernon Oswald; Lowell Ahart 1997-6-24 8631 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
  CHSC87122  Erigeron bloomeri var. bloomeri L. P. Janeway 2001-6-20 7198 Lassen Modoc Plateau. Along '22' Road about 1.8 km west of Black Hole, about 11.9 km north-northeast of Harvey Mountain. 1500 Comment
  UC1136834  Erigeron bloomeri var. bloomeri George A. Fischer and Irwin H. Johnson 1933-7-12 F 217 Lassen Lassen National Forest 1722 Comment
  UC1609105  Erigeron bloomeri var. bloomeri Vernon H. Oswald and Lowell Ahart 1993-6-28 5581 Lassen Harvey Valley Rd (33N02) 1.2 mi n Hwy 44 (e side of valley, e of Poison Lake); Grays Valley 1731 Comment
  UC506989  Erigeron bloomeri var. bloomeri George A. Fischer and Irwin H. Johnson 1933-7-12 F 217 Lassen Lassen National Forest 1722 Comment
  UCR45383  Erigeron bloomeri var. bloomeri Thomas W. Nelson, Jane P. Nelson 1980-7-6 6034 Lassen Ash Valley, along branch road off Adin-Madeline Road just south of bridge over Ash Creek, & c. 16 mi. SE of Adin; 2.5 mi. SE of junction with main road 1555 Comment
  CAS-BOT-BC297144  Erigeron concinnus var. concinnus Ella Dales Cantelow 1940-5-31 3086 Lassen e. of Bieber 1219 Comment
  CAS-BOT-BC297146  Erigeron concinnus var. concinnus John Thomas Howell 1934-7-6 12439 Lassen Harvey Valley Comment
  JEPS84932  Erigeron divergens Barbara Ertter 1987-7-24 7303 Lassen ca .75 mi ene Beckwourth Pass (at end of old crumbling paved road) 1524 Comment
  UC1776657  Erigeron eatonii var. nevadincola G. Schoolcraft 1998-6-30 2743 Lassen N slope of Ft. Sage Mountains 1950 Comment
  CHSC65088  Erigeron eatonii var. plantagineus Vernon H. Oswald; Lowell Ahart 1995-7-24 7129 Lassen High Cascade Range. N of Lake Almanor and ca. 2 mi ESE of Silver Lake on Forest Route 10 just S of its jct. with Forest Road 30N21. At roadside. 1935 Comment
  CAS-BOT-BC33453  Erigeron elegantulus Milo Samuel Baker; Franklin P. Nutting 1894-7-5 s.n. Lassen Dixey Valley Comment
  POM32996  Erigeron filifolius Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC87694  Erigeron filifolius T. S. Brandegee 1892-6-26 Lassen Milford Comment
  UCR244069  Erigeron filifolius var. filifolius Jim Andre, G. L. Clifton 1993-6-9 19695 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
  SBBG8113  Erigeron inornatus H. and M. Dearing 1938-7-1 2236 Lassen Susanville Comment
  SEINET5708488 Image available Erigeron inornatus var. inornatus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7715 Lassen Grasshopper Valley. Collected along CA 139.; Grasshopper Valley 1586 Comment
  SEINET5708489 Image available Erigeron inornatus var. inornatus Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7715 Lassen Grasshopper Valley. Collected along CA 139.; Grasshopper Valley 1586 Comment
  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
  UC206218  Erigeron linearis Frank Stephens 1894-7-10 Lassen above Pete's Valley 1463 Comment
  CAS-BOT-BC295958  Erigeron philadelphicus G. Schoolcraft 1993-6-1 2273 Lassen Secret Creek area s. of Tule Patch Spring 1463 Comment
  UC31512  Erigeron philadelphicus var. philadelphicus Milo S. Baker 1893-7-3 Lassen Big Valley Comment
  HSC100803  Erigeron pumilus var. intermedius Lowell Ahart, John Dittes 2010-7-31 16986 Lassen 3,330 ft. N of where the road crosses Hunsinger Draw, 1.9 (air) mi. NW of Moll Reservoir, 2.8 (air) mi. W of Ash Valley, and 8.4 (air) mi. SE of Adin. 1521 Comment
  UC1567402  Erigeron pumilus var. intermedius G. Schoolcraft 1989-6-19 1916 Lassen Ash Valley RNA/ACEC , Susanville 1554 Comment
  UCD18963  Erigeron pumilus var. intermedius R. E. Francis 1965-7-7 8 Lassen Lassen National Forest, Harvey Valley Allotment. 1737 Comment
  CAS-BOT-BC300310  Erigeron tener G. L. Stebbins, Jr.; J. A. Jenkins 1937-7-10 2285 Lassen Summit Thompson Peak, south of Janesville 2330 Comment
  CHSC116927  Eriogonum J. P. Bergmann 3011-04-30 Lassen Fort Sage OHV Recreation area. 1450 Comment
  SEINET5333913  Eriogonum baileyi D. Tonenna 2007-8-20 s.n. Lassen Hwy 395, 6 mi. north of Halellujah Junction, west of road 1450 Comment
  SEINET3836451 Image available Eriogonum baileyi var. baileyi W. L. Jepson 1918-8-2 7772 Lassen Beckwith Pass 1463 Comment
  SEINET5328378  Eriogonum baileyi var. baileyi M. J. Williams 1974-7-26 74 -L-25 Lassen 2 mi. west of Hallelujah Junction, south of Hwy. 70. 1494 Comment
  UC1409081  Eriogonum baileyi var. baileyi R. F. Thorne and C. W. Tilforth 1969-9-6 39260 Lassen ca. 0.7 mi se along Hwy 395 Milford (w of Honey Lake) 1280 Comment
  CAS-BOT-BC244039  Eriogonum baileyi var. praebens R. F. Hoover 1940-10-5 4673 Lassen Between Shaffer Mt. and Warren Peak Comment
  JEPS25524  Eriogonum collinum Rimo Bacigalupi with Lincoln Constance 1959-6-16 7136 Lassen sandy playa 1/4 mi beside US 395 road to Smoke Creek 1341 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
  UC1537298  Eriogonum collinum Gordon H. True Jr. 1938-9-9 912 Lassen Madeline Plains 1524 Comment
  CAS-BOT-BC246499  Eriogonum douglasii var. meridionale B. J. Hammerly 1941-6-20 45 Lassen 8 mi. S.-E. of Likely on Blue Lake road 1676 Comment
  CAS-BOT-BC246502  Eriogonum douglasii var. meridionale Doris Kildale Gillespie 1930-5-13 9361 Lassen Between Susanville and Janesville Comment
  CHSC23494  Eriogonum douglasii var. meridionale K. R. Stern 1974-6-26 5866 Lassen E end of Champs Flat. Comment
  CAS-BOT-BC246510  Eriogonum elatum var. elatum John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50666 Lassen Summit ridge of Diamond Mt. 2346 Comment
  CAS-BOT-BC255743  Eriogonum elatum var. villosum Clare B. Hardham 1969-8-28 17459 Lassen West of Janesville, Sierra Nevada Comment
  NY281710  Eriogonum maculatum G. Schoolcraft 1986-9-9 1670 Lassen 1 mile W of Ca-NV stateline along Smoke Creek Road. 1341.1 Comment
  RSA78919  Eriogonum microtheca var. ambiguum E. K. Balls, Percy C. Everett 1952-10-10 18143 Lassen 8 mi. SE of Ravendale, Hwy 395, Susanville to Alturas. 1280 Comment
  RSA703914  Eriogonum microtheca var. schoolcraftii James L. Reveal 2002-8-2 8370 Lassen 0.2 mile W of Plinco Mine Road (Lassen Co. road 331), 3.5 miles E of Hwy 395 at Doyle. 1662 Comment
  JEPS126478  Eriogonum microthecum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-8-18 CA 350 -069 Lassen Directly off Horse Lake Road, on either side of the road. Comment
  UC1523724  Eriogonum microthecum var. ambiguum Gary Schoolcraft 1982-8-18 898 Lassen s Doyle Grade Road (w of Doyle) 1584 Comment
  CAS-BOT-BC268689  Eriogonum microthecum var. laxiflorum Ynez Whilton Winblad 1935-9-29 s.n. Lassen Horse Lake Comment
  CHSC78482  Eriogonum microthecum var. laxiflorum Vernon H. Oswald 2000-7-31 9947 Lassen Spur road leading from Forest Road 28N15 to the small pond on the crest of Diamond Mountain. 2215 Comment
  UC85949  Eriogonum microthecum var. laxiflorum T. S. Brandegee 1892-6-23 Lassen Honey Lake Comment
  NY572524  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 1982-7-20 807 Lassen Lower slopes of Wagner Canyon 1402.1 Comment
  NY803458  Eriogonum microthecum var. schoolcraftii G. Schoolcraft 2003-8-26 2946 Lassen Slopes west of The Mark Store 6 miles southeast of Milford, CA - nw1/4 1320 Comment
  CAS-BOT-BC266364  Eriogonum nudum var. deductum Louella Bass 1973-6-14 EV 105 Lassen Elysian Valley 1325 Comment
  RSA518563  Eriogonum nudum var. nudum George K. Helmkamp 1990-9-23 G- 11 Lassen N of Ravendale 1677 Comment
  CAS-BOT-BC261446  Eriogonum nudum var. nudum Mike Vasey 1990-6-30 9056 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CHSC13456  Eriogonum nudum var. pubiflorum J. Pitts 1972-6-25 272 Lassen 30 yds. e of Papoose Creek on Road 4.25, on n side of road. S of Eagle Lake 1/4 mi. Comment
  CAS-BOT-BC266813  Eriogonum nummulare John Thomas Howell 1951-8-20 28228 Lassen Honey Lake Valley near Hurlong 1280 Comment
  SEINET530684  Eriogonum nummulare Paul Opler 2007-7-7 Lassen N end Turtle Mountain. 1288 Comment
  POM105327  Eriogonum ochrocephalum var. ochrocephalum Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  UCD100769  Eriogonum ovalifolium Beecher Crampton 1964-6-26 7087 Lassen 35 miles NW of Susanville, State Hwy. 44, Gray's Valley, 3 miles north Bogard Ranger Station. Comment
  CHSC114416  Eriogonum ovalifolium var. depressum Don Lepley 2012-7-26 Lassen Windy Hollow, west of Highway 44 about three miles southeast of Bogard Rest Area. (plants also in Section 14 and probably Sec. 15 of T31N R08E) 1722 Comment
  UC412810  Eriogonum ovalifolium var. ovalifolium Franklin P. Nutting Lassen Pine Creek Comment
  HSC63562  Eriogonum prociduum Thomas W. Nelson, Jane P. Nelson 1980-7-6 6027 Lassen Ash Valley, along branch road off Adin-Madeline road, 200 yds. from junction 1555 Comment
  RSA59736  Eriogonum prociduum E. K. Balls 1950-5-19 14780 Lassen 16.5 miles W of Madeline on road from Adin 1677 Comment
  SEINET5330019  Eriogonum prociduum E. K. Balls 1950-5-19 14780 Lassen 16.5 mi. W. of Madeline on road from Adin. 1676 Comment
  POM165251  Eriogonum spergulinum var. reddingianum M. S. Baker 77 Lassen Pine Creek. Comment
  POM203845  Eriogonum spergulinum var. reddingianum J. T. Howell 1934-7-6 12446 Lassen Harvey Valley Comment
  RSA713122  Eriogonum spergulinum var. reddingianum L. P. Janeway, B. Castro 2005-7-10 8483 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 and 28N02) and Road 28N01. 1859 Comment
  UC303059  Eriogonum spergulinum var. reddingianum Pearl Safford Lassen Susanville [uncertain locality] Comment
  CAS-BOT-BC271959  Eriogonum sphaerocephalum var. halimioides Pauleen Broyles 1977-6-1 165 Lassen Spencer Basin, 8 km n of Herlong 1770 Comment
  CHSC25314  Eriogonum sphaerocephalum var. halimioides Pauleen Broyles 1977-6-1 165 Lassen Spencer Basin, 8 km n of Herlong. 1770 Comment
  UC1226260  Eriogonum sphaerocephalum var. halimioides Arthur Cronquist, Arthur H. Holmgren 1959-6-18 8482 Lassen 5 mi s Adin Comment
  UC1609360  Eriogonum sphaerocephalum var. halimioides Vernon H. Oswald and Lowell Ahart 1993-7-8 5674 Lassen 1.4 mi ssw Pittville Rd. (Lassen 111, 36N01) (e side of Hall's Flat Rd. (33N18), ca. 5.4 air mi nw of Poison Lake) 1694 Comment
  CAS-BOT-BC262744  Eriogonum strictum var. anserinum John Thomas Howell 1934-7-7 12478 Lassen Harvey Valley Comment
  UC1924216  Eriogonum strictum var. anserinum Debra Valov 2004-6-9 2004268 Lassen Bieber; off County A2 c. 12 km E of Hwy 299 1270 Comment
  CHSC25912  Eriogonum strictum var. proliferum K. R. Stern 1967-7-1 2435 Lassen California State Hwy. 139, 14 mi. N of Susanville. Comment
  UC412821  Eriogonum strictum var. proliferum T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  CAS-BOT-BC267889  Eriogonum umbellatum Hans Leschke 1964-9-3 1892 Lassen Cinder Cone, Lassen Volcanic National Park Comment
  RSA782634  Eriogonum umbellatum Elizabeth A. Kempton, Tim Tibault 2006-7-29 418 Lassen Town of Chester. Vacant lot at intersection of Willow Way and Main Street 1388 Comment
  SBBG64170  Eriogonum umbellatum D. Crofton-Atkins 1931-6-7 Lassen Susanville 1310 Comment
  CAS-BOT-BC267886  Eriogonum umbellatum Ralph K. Gierisch 1968-7-11 3346 Lassen Harvey Valley 1676 Comment
  CHSC23499  Eriogonum umbellatum var. modocense Wayne O. Baum 1971-7-9 71 -81 Lassen N. slope of Gallatin Peak. 2072 Comment
  UCR268959  Eriogonum umbellatum var. modocense Jim Andre, Tasha La Doux, Senna T. Andre, Elias Andre 2013-7-12 31429 Lassen along north side of Hwy 44 at south end of Grays Valley, along National Forest Route 33N02, north of Bogard Buttes, c. 30 mi west of Susanville 1733 Comment
  CAS-BOT-BC265091  Eriogonum umbellatum var. nevadense John Thomas Howell 1976-7-19 51951 Lassen Southwest of Susanville on Gold Run Road, Sierra Nevada 1341 Comment
  CHSC106592  Eriogonum umbellatum var. nevadense C. Dow; D. Garrison 2008-5-3 Lassen Fort Sage Mtns. OHV Trailhead and Trail to Indian Springs. 1439 Comment
  UC1032336  Eriogonum umbellatum var. nevadense A. Simontacchi 1940-6-15 877 Lassen 1.6 mi ssw Blacks Mtn.; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1143015  Eriogonum umbellatum var. nevadense August L. Hormay 1934-7-2 Lassen 1/4 mi nw Black's Mtn. Headquarters; Lassen National Forest 1706 Comment
  UC585250  Eriogonum umbellatum var. nevadense E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1756 Lassen nw facing slope of ridge e Red Rock 1600 Comment
  UC773862  Eriogonum umbellatum var. nevadense L. R. Short and J. Warren 1936-6-12 S- 432 Lassen Burgess Spring Experiment Range Lassen Forest, Burgess Spring Experiment Range 1804 Comment
  SEINET10479566  Eriogonum umbellatum var. nevadense Taylor 1982-8-27 Taylor 5056 Lassen T24N R17E sw/sw sec 7. Constantia quad. Crystal Peak summit area, Diamond Mts, ca. 6 air mi sw of Doyle. 7800 ft. Comment
  CAS-BOT-BC262363  Eriogonum vimineum John Thomas Howell 1934-6-10 11893 Lassen Horse Lake Comment
  CHSC4953  Eriogonum vimineum R. Carter 1967-6-27 561 Lassen Growing ca. 10 yds off n side of rd., 1.75 mi w of Eagle Lake Biology Station. 1584 Comment
  CHSC56867  Eriogonum vimineum Mary Meyer 1980-7-3 Lassen North of Jeep trail going up drainage above camping pullover. 1584 Comment
  CHSC64888  Eriogonum vimineum Vernon H. Oswald; Lowell Ahart 1995-6-19 6882 Lassen Between Litchfield and Ravendale on Smoke Creek Ranch Rd., 0.7 mi e of Hwy. 395. On the edges and bottom of an eroded dry wash on the n side of the road. 1371 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
  NY399609  Eriogonum vimineum J. L. Reveal 1971-6-22 2464 Lassen Along U.S. Highway 395, 4.5 miles south of Ravendale Comment
  POM195124  Eriogonum vimineum D. D. Keck 1930-7-23 951 Lassen Susanville. 1280 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
  SEINET14417545  Eriogonum vimineum Robert L. Johnson, Mikel R. Stevens 2015-1 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.; South to southwest-facing slope. 1545 Comment
  UC1032292  Eriogonum vimineum H. S. Yates 1936-8-11 6070 Lassen Baxter Creek Susanville Quadrangle, Baxter Creek Comment
  UC1601757  Eriogonum vimineum T. S. Brandegee 1892-6-26 Lassen Milford Comment
  UCR102423  Eriogonum vimineum G. R. Ballmer 1988-7-21 s.n. Lassen Rest stop between Ravendale and Litchfield on Hwy 395 1657 Comment
  JEPS56155  Eriogonum vimineum Alma U. Ames 1917-10-9 50 Lassen 25 mi n, on Hat Creek Road Mt. Lassen Comment
  SD51226  Eriogonum vimineum D. F. Howe 1960-9-21 2994 Lassen 2 miles north of Janesville on #395 1280 Comment
  CDA38977  Eriophorum gracile Gordon Leppig and T. LaBanca 1997-6-29 531 Lassen Blue Lake Ranch; Modoc National Forest. Comment
  CHSC66273  Eriophorum gracile Vernon H. Oswald; Lowell Ahart 1996-6-24 7888 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. Modoc Plateau. 1633 Comment
  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
  HSC97608  Eriophorum gracile Vernon H. Oswald, L. Ahart 1996-6-24 7888 Lassen Papoose Meadows, 0.5 mi. E of Eagle Lake Rd. (A1) and 2.5 mi. S of Eagle Lake, Modoc Plateau 1634 Comment
  CAS-BOT-BC300339  Eriophyllum Mike Vasey 1990-6-30 9058 Lassen Ash Valley, along primitive road south of junction of Ash Valley Road and Spooner Road. Modoc National Forest 1500 Comment
  CHSC5210  Eriophyllum lanatum W. Vinyard 1946-6-10 Lassen Pelican Point, Eagle Lake. 1556 Comment
  HSC28861  Eriophyllum lanatum D. H. Norris, Thomas W. Nelson, S. Dowty 1971-6-22 19174 Lassen Harvey Valley near Cone Springs Comment
  CHSC64754  Eriophyllum lanatum var. achilleoides Vernon H. Oswald 1995-5-31 6800 Lassen Modoc Plateau. Smoke Creek Ranch Rd. 0.4 mi e of Hwy. 395, between Litchfield and Ravendale. 1383 Comment
  CAS-BOT-BC301529  Eriophyllum lanatum var. integrifolium H. D. Ripley; R. C. Barneby 1943-6-13 5717 Lassen South of Johnstonville 1325 Comment
  PASA2212  Eriophyllum lanatum var. integrifolium Frank W. Peirson 1926-6-24 Lassen Several miles southward from the Madeline Plain Comment
  POM66833  Eriophyllum lanatum var. integrifolium Marcus E. Jones 1897-6-30 s.n. Lassen Eagle Lake, 27 miles from Susanville. 1524 Comment
  UC1368789  Eriophyllum lanatum var. integrifolium John L. Strother 1970-5-23 956 Lassen about 6 mi n Honey Lake 1280 Comment
  UCD103215  Erodium cicutarium P. B. Schultz 1967-7-12 75 Lassen 100 feet east of highway, 1/4 mile west of Willow Creek campground, 14.9 miles southeast of Adin on State Highway 139. 1524 Comment
  JEPS97782  Eryngium alismifolium Annetta M. Carter 1945-9-30 1716 Lassen W side of Eagle Lake. About 3 mi. S of Spaldings where road crosses bridge over dry creek. Comment
  RSA22014  Eryngium alismifolium J. T. Howell 1934-7-10 12542 Lassen Patterson Flats Comment
  SEINET8673813  Eryngium alismifolium Ornduff 1958-7-22 5014 Lassen along Highway 395, 6.6 miles north of Ravendale Comment
  CDA38324  Eryngium articulatum Wheeler 1953-9-22 s.n. Lassen [no additional info] 0 Comment
  CAS-BOT-BC41510  Erysimum asperum Geo. A. Fisher 1928-6-21 28 Lassen Lassen Forest. 1615 Comment
  UC1584017  Erysimum capitatum G. Schoolcraft 1990-5-15 2047 Lassen about 4 mi s Nubeiber; John's Valley area 1310 Comment
  UC1137587  Erysimum capitatum var. capitatum A. Simontacchi 1940-6-15 868 Lassen 0.6 mi wsw Blacks Mt.; Lassen National Forest, Halls Flat Quadrangle Comment
  CAS-BOT-BC54956  Erysimum perenne Louella Bass 1973-4-30 EV 34 Lassen Elysian Valley. 1325 Comment
  CAS-BOT-BC150214  Erythranthe Clare B. Hardham 1969-8-28 17453 G Lassen West of Janesville Comment
  CHSC91306  Erythranthe floribunda Lowell Ahart; John Dittes 2005-6-2 11970 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  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
  SEINET14291746  Erythranthe guttata C. G. Gulling 1905-1 1546 Lassen Big Meadows. Comment
  CHSC60923  Erythranthe inflatula Vernon H. Oswald; Lowell Ahart 1993-7-8 5652 Lassen Pittville Rd. (Lassen 111, 36N01) 1.9 mi N of Hwy. 44, on the SE edge of Poison Lake. 1709 Comment
  CAS-BOT-BC153611  Erythranthe moniliformis Clare B. Hardham 1971-8-22 18384 Lassen Diamond Mountain 2133 Comment
  CHSC37357  Erythranthe primuloides NE Heiken 1978-7-5 73 Lassen S of Eagle L., E shore of Mahogany L. 2060 Comment
  CHSC4974  Erythranthe primuloides D. L. Stites 1967-7-14 168 Lassen 3 mi e of turnoff to Silver Lake on highway 44. 1524 Comment
  CHSC77236  Erythranthe primuloides G. Schoolcraft 1993-7-20 2329 Lassen About 1 mile s. of Boot Lake. 1950 Comment
  CHSC93671  Erythranthe suksdorfii Lowell Ahart; John Dittes 2005-6-2 11963 Lassen Meadow, along a poor dirt road, about 1 mile east of the Anderson Ranch home, Long Valley, about 4 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.0 miles (air) northwest of Hallelujah Junction. 1425 Comment
  CAS-BOT-BC403146  Eschscholzia californica Alice Eastwood; John Thomas Howell 1940-6-16 8344 Lassen Janesville Comment
  CHSC6197  Eschscholzia californica R. Gein 1946-6-17 Lassen Horse Lake, near Eagle Lake. 1554 Comment
  CHSC7770  Eschscholzia californica Beverley J. Wise 1969-5-17 72 Lassen City limits of Susanville on Hwy 139. 1310 Comment
  RSA719891  Eschscholzia californica Michael A. Vincent, K. Levings 2006-7-29 12913 Lassen Along Rt. 395, ca. 6 miles SE of Johnstonville. Comment
  CAS-BOT-BC403149  Eschscholzia californica Elmer I. Applegate 1923-9-30 4033 Lassen Constantia Comment
  CAS-BOT-BC403152  Eschscholzia californica Mrs. H. C. Cantelow 1935-6-8 926 Lassen 13 mi. W. of Bieber Comment
  UCR67467  Eucephalus breweri George K. Helmkamp 1990-10-4 M- 6 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  RSA0086578  Euphorbia Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  CDA35317  Euphorbia crenulata T. C. Fuller 1962-6-13 8997 a Lassen 0.5 mile south of Highway 36 to Chester, 2 miles west of Westwood. 0 Comment
  SEINET10848005  Euphorbia peplus Jeffrey Huber 1971-6-11 Huber 333 Lassen 1 mi. W of Westwood, on CA Hwy. 36. Comment
  SEINET12143360  Euphorbia serpillifolia Unknown 1978-1 103 Lassen along dirt road near Miners Point, SE end of Eagle Lake 1585 Comment
  UC468921  Eurybia integrifolia Franklin P. Nutting Lassen Silver Lake Comment
  CAS-BOT-BC312106  Eurybia integrifolia Alice Eastwood 1912-8-22 1883 Lassen Morgans Springs, Lassen Butte Region Comment
  CAS-BOT-BC310646  Euthamia occidentalis G. Schoolcraft 1997-8-20 2698 Lassen On Susan River behind BLM office in Susanville 1264 Comment
  CAS-BOT-BC458296  Euthamia occidentalis Louella Bass 1980-8-1 s.n. Lassen Sierra Nevada: Standish Comment
  CHSC99481  Festuca idahoensis Lowell Ahart; John Dittes 2008-6-19 14880 -A 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
  JEPS123453  Festuca idahoensis Wilson Collison, Jaileen Merced 2015-8-5 CA 320 -142 Lassen Trap Mountain, Wing allotment. Highway 139 W (north) from Termo Grasshopper Road. Comment
  JEPS127716  Festuca idahoensis Alejandro Brambila, Michael Dolan 2016-7-25 CA 320 -171 Lassen Clarks Valley Road west off 395 right after Likely Mtn. About 1Mile before Christensen Corral Comment
  RSA647539  Festuca idahoensis Marion P. Harthill 1972-6-17 822 Lassen Madeline. 1677 Comment
  UC1024834  Festuca idahoensis Leo Whitney 1935-6-11 3224 Lassen Camp 10, Fruit Grower's Supply Company Lassen National Forest Comment
  UCR244064  Festuca microstachys Jim Andre, G. L. Clifton 1993-6-9 19690 Lassen Foothills of Sierra Nevada Mtns., Honey Lake Valley, c. 5 mi. west of Doyle (at U.S. 395), just inside Plumas NF boundary 1631 Comment
  CAS-BOT-BC278932  Festuca rubra John Thomas Howell 1934-7-6 12458 Lassen Harvey Valley Comment
  UC1024686  Festuca rubra Leo Whitney 1933-8-3 2159 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  UCD66360  Festuca rubra R. Tofsrud 1947-7-1 220 Lassen Cedar Cr. East of Madeline. Comment
  CHSC68892  Floerkea proserpinacoides Vernon H. Oswald; Lowell Ahart 1997-6-24 8650 Lassen South of Susanville just south of the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. Meadow. 2249 Comment
  UC963893  Floerkea proserpinacoides Milo S. Baker 1952-5-23 12421 b Lassen e of Chester (along Highway 36); Highway 36 Comment
  JEPS28492  Fragaria virginiana George W. Gillett 1957-7-22 884 Lassen s end Snag Lake (near campsite); Lassen Volcanic National Park 1850 Comment
  SEINET10852446  Frangula rubra Karen M. Meyer, Andrew Townesmith 2007-7-23 Meyer 156 Lassen Lassen National Forest. 5.6 miles SW on 32N10 off Hwy. 44. (Turn at rest area). 1980 Comment
  RSA523910  Frasera albicaulis Gordon H. True Jr. 1936-6-25 539 Lassen East of Harvey Ranger Station, Harvey Valley. 1768 Comment
  HSC21366  Fremontodendron californicum J. J. Wagoner 1965-4-30 49 Lassen 16 mi. W of Child's Meadow, along Hwy. 36 Comment
  CHSC36488  Fritillaria atropurpurea Theresa Costa 1982-6-5 39 Lassen Along e slope Gallatin Mountain. Comment
  UC1523745  Galium bolanderi Gary Schoolcraft 1981-7-21 543 Lassen ne Pittville (along Hwy 299) 1249 Comment
  SEINET12495958  Galium multiflorum var. multiflorum G. Schoolcraft 1999-7-12 2857 Lassen North slope of Tulehead canyon near NV stateline 1737 Comment
  RSA0105575  Galium trifidum subsp. columbianum Lowell Ahart, John Dittes 2013-7-23 18895 Lassen Along the south margin of the levee road, about 150 yards east of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  OBI77063  Garrya fremontii Anthony Baniaga 2011-6-7 310 Lassen Lassen NF.. W of 34N60. Burney Mtn East quad. T34N r3E sec 35 SW of NE 1747 Comment
  UCD55278  Gayophytum diffusum Ellen Dean 2006-5-15 3093 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
  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
  POM355365  Gayophytum diffusum subsp. parviflorum Christopher Davidson 1975-6-7 2759 Lassen 1 mile E of Beckwourth Pass on 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
  SEINET10453071  Gayophytum diffusum subsp. parviflorum Mary Susan Taylor 1982-8-19 Taylor 5023 Lassen T23N R17E ne sec 23? Beckwourth Pass quad. E side of Hwy 395, ca. 4 mi n of its jct with Hwy 70 at Hallelujah Jct. Sagebrush Scrub; 4900 ft. 1493 Comment
  JEPS117576  Gayophytum heterozygum Lowell Ahart, John Dittes 2010-7-31 17025 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
  POM38695  Gayophytum heterozygum Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  CHSC93686  Gayophytum racemosum Lowell Ahart; John Dittes 2005-6-1 11884 Lassen Along a poor dirt road, west of Scott Road, Long Valley, about 2 1/2 miles (air) northwest of the intersection of Scott Road and Highway 70, 4.0 miles (air) northwest of Hallelujah Junction. 1438 Comment
  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
  RSA0004472  Gayophytum ramosissimum var. obtusum W. L. Jepson 1918-8-2 7755 Lassen Beckwith Pass 1463 Comment
  UC303061  Gentiana newberryi Pearl Safford Lassen Susanville [uncertain locality] Comment
  JEPS28803  Gentianella amarella subsp. acuta George W. Gillett 1957-9-4 1130 Lassen 0.25 mi below Widow Lake (near Butte Lake, on Widow Lake trail); Lassen Volcanic National Park 1905 Comment
  UCD103467  Geranium oreganum L. R. Short; Wm. Gansberg 1936-6-12 S- 433 Lassen Lassen Forest, MDM, Burgess Spr. Exp. Range. 1807 Comment
  JEPS44857  Geum aleppicum W. L. Jepson 1918-8-4 7810 Lassen Horse Lake 1554 Comment
  RSA454467  Geum canescens Roch Well 1923-7-1 s.n. Lassen 12 miles from Eagle Lake Comment
  UC1037208  Geum macrophyllum var. perincisum Leo Whitney 1933-8-14 1568 Lassen 8 mi nw of Eagle Lake (Lassen National Forest, Slate Creek); Lassen National Forest, Slate Creek 1920 Comment
  JEPS114756  Geum triflorum Lowell Ahart, John Dittes 2008-6-19 14872 Lassen Along a small wash, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber 1578 Comment
  RSA470172  Gilia brecciarum Christopher Davidson 1975-6-7 2757 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  JEPS94830  Gilia inconspicua Vernon H. Oswald and Lowell Ahart 1998-5-22 9107 Lassen 5 mi nne of Doyle (Road to ORV parking area in Fort Sage Mountains, 0.5 mi e of Fort Sage Road); Fort Sage Mountains 1371 Comment
  RSA104286  Gilia modocensis Verne Grant, Alva Grant 1956-5-17 9796 Lassen Just south of Secret Valley, north of Litchfield, along Hwy. 395. 1311 Comment
  NY964018  Gilia salticola A. Tiehm 1986-5-12 10346 Lassen 14.4 road miles east of highway 395 on the dirt road to Smoke Creek and the Smoke Creek Desert 1448 Comment
  UC1562812  Gilia salticola Barbara Ertter with Gary Schoolcraft 1987-6-16 7189 Lassen on s side Hot Springs VABM (ne side Honey Lake, Skeedaddle Mountains); Skeedaddle Mountains, s side Hot Springs VABM 2286 Comment
  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
  CHSC115832  Glyceria borealis Lowell Ahart; John Dittes 2015-7-14 20326 Lassen In Big Vallley Canal, on the east side 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. 1269 Comment
  RSA0030654  Glyceria borealis Anthony Baniaga 2011-7-23 463 Lassen Lassen National Forest. Poison Lake. 1700 Comment
  UC1776715  Glyceria elata G. Schoolcraft 1994-7-6 2354 Lassen About 2 miles west of Boot Lake 2072 Comment
  CHSC113079  Gnaphalium palustre Lowell Ahart; John Dittes 2013-7-22 18861 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
  HSC82197  Gnaphalium palustre Thomas W. Nelson, Jane P. Nelson 1980-7-6 6052 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  CAS-BOT-BC302592  Gnaphalium palustre George W. Gillett 1957-9-4 1124 Lassen Lassen Volcanic National Park. Widow Lake 2072 Comment
  HSC27351  Grayia spinosa D. H. Norris, T. Nelson, S. Dowty 1971-6-22 19302 Lassen Along Hwy. 395 about 4 mi. E of Standish Comment
  JEPS29750  Grayia spinosa Rimo Bacigalupi and L. R. Heckard 1962-5-28 8504 Lassen n. of Honey Lake (2 mi. e. of Wendel junction on rd. from U.S. 395 past Flanagan to Pyramid Lake -Nevada) 1219 Comment
  UC1136429  Grayia spinosa C. W. Hanks 1934-9-25 88 Lassen near the Plumas Nat'l Forest Long Valley; Sierraville Quad., Long Valley Comment
  UC1136433  Grayia spinosa E. Sawyer 1935-6-27 225 Lassen Long Valley Sierraville Quad., Long Valley Comment
  UC1537382  Grayia spinosa Gordon H. True Jr. 1936-6-26 551 Lassen flats s.e. Standish; Honey Lake Valley 1219 Comment
  UCD55266  Grayia spinosa Ellen Dean 2006-5-15 3064 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
  UC87888  Grindelia hirsutula T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  SEINET5709434 Image available Grindelia squarrosa Lowell E. Urbatsch, Vesna Karaman, Castro 2000-1 7709 Lassen Willow Creek. Collected along CA 139.; Willow Creek 1428 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
  CAS-BOT-BC304680  Grindelia squarrosa Margaret Williams 1974-8-4 74 -L-84 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  UC1609450  Gymnosteris parvula Vernon H. Oswald and Lowell Ahart 1993-6-3 5485 Lassen between Susanville and Poison Lake (Champs Flat Rd. (Lassen 105, Forest 32N28Y), 2.8 mi n of its jct w Lassen 21 (32N02) to Eagle Lake, on w edge of Pine Creek Valley); Pine Creek Valley, Champs Flat Road 1731 Comment
  CDA36783  Gypsophila paniculata D. B. Joley 1976-6-22 1 Lassen Janesville. 0 Comment
  UC1035882  Hackelia californica Annie M. Alexander and Louise Kellogg 1946-8-13 5155 Lassen w side of Eagle Lake (top of grade) 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
  UC1553392  Hackelia cusickii G. Schoolcraft 1988-7-7 1810 Lassen about 14 air mi ne of Ravendale 1798 Comment
  UC1042370  Halogeton glomeratus Tho. H. Kearney and John Thomas Howell 1951-8-20 28229 Lassen near Herlong; Honey Lake Valley 1280 Comment
  RSA98051  Halogeton glomeratus Thomas H. Kearney, J. T. Howell 1951-8-20 28229 Lassen Honey Lake Valley near Herlong. 1280 Comment
  CHSC12456  Hastingsia alba Robert W. Severin 1969-6-26 34 Lassen 7.2 mi along road from E. L. B. S. to Galatin Beach; 3 mi. s of E. L. B. S. 1645 Comment
  CHSC12485  Hastingsia alba Carol Weld 1969-6-26 44 Lassen 7.8 miles S. W. of Eagle Lake Field Station. 1584 Comment
  GMDRC7736  Helianthus cusickii J. M. Andre, G. Clifton 1993-6-1 33413 Lassen Modoc Plateau: along US Hwy 395 at Viewland, approx 8 mi. ENE of Litchfield, 20 mi. NE of Susanville, east side of Shaffer Mtn 1399 Comment
  UC1483881  Helianthus cusickii G. Schoolcraft 1979-6-19 71 Lassen South of Big Spring Comment
  UC1191654  Heliotropium curassavicum Verne Grant and Irving Schneider 1947-9-5 8373 Lassen n.w. shore Eagle Lake (by Sam Webb's place (Spaulding)) Comment
  HSC68922  Heliotropium curassavicum var. oculatum Gary Schoolcraft 1980-7-10 303 Lassen E shore of Eagle Lake 1555 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
  SJSU8133  Hemizonella minima J. W. Tilden 1960-6-27 1500 Lassen outskirts of Westwood at foot of Moonlight Rd 1524 Comment
  CDA7823  Hemizonia lobbii T. C. Fuller 1964-10-7 12691 Lassen Hillside Cemetery, 1 mile southwest of Nubieber. 0 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
  SBBG6101  Hesperochiron californicus H. and M. Dearing 1938-6-30 2230 Lassen 20 mi N of Susanville [Hwy 44] Comment
  SEINET5499704  Hesperochiron californicus N. H. Holmgren, P. K. Holmgren 1978-6-11 8910 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance. 1680 Comment
  UC73707  Hesperochiron californicus Milo S. Baker 1896-5-12 Lassen near Palmer's Comment
  SEINET5499822  Hesperochiron pumilus C. G. Gulling 1905-1 s.n. Lassen Big Meadows Comment
  CHSC4793  Hesperolinon micranthum R. Carter 1967-6-29 570 Lassen On rd to Murrer's Meadow. Eagle Lake. Comment
  RSA164418  Hesperolinon micranthum Clare B. Hardham 1961-6-16 7449 Lassen Gold Run Creek south of Susanville. Comment
  SJSU7861  Hesperolinon micranthum V. Hardham 1965-7-12 127 Lassen Willow Cr c. 13 mi SE of Adin (Siskiyou County) on State Rt 139 1463 Comment
  UCD85305  Hesperostipa comata P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia, California. Comment
  CHSC23522  Hesperostipa comata subsp. intermedia Wayne O. Baum 1971-7-12 71 -67 Lassen E. slope of Gallatin Peak. 1950 Comment
  SEINET7106129  Heterotheca villosa var. minor Richard R. Halse 2010-8-26 8091 Lassen Along State Hwy. 70 at Beckwourth Pass ca 4.3 miles west of its junction with U.S. Hwy. 395 or 1.6 miles E of Sierra Valley.; 0 1584 Comment
  RSA0009648  Heterotheca villosa var. minor Marcus E. Jones 1897-6-18 s.n. Lassen Chat Comment
  RSA41674  Heterotheca villosa var. minor Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
  NY783478  Heuchera rubescens G. Schoolcraft 1982-6-23 728 Lassen Fort Sage Mountains 1828.8 Comment
  POM36066  Hieracium albiflorum Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  UC1069594  Hieracium argutum H. P. Hagge 1929-9-18 39 Lassen Logan Mountain Eagle Lake Quad., Logan Mountain Comment
  CHSC98320  Hieracium greenei B. Castro; L. P. Janeway 2005-7-10 1505 Lassen Northern High Sierra Nevada. Ca 1-2 mi E of Westwood, on N side of Hwy 36. In flat open ridge area within Jeffrey pine/Pondersosa pine forest. Township/Range approximate location. 1566 Comment
  OBI77185  Hieracium greenei Anthony Baniaga 2011-7-18 454 Lassen Lassen NF.2-1/4 mi ESE of Signal Butte. Swains Hole quad. T32N R6E sec 9 NE of SW 1700 Comment
  UC485536  Hieracium horridum Franklin P. Nutting 1984-7-30 Lassen Silver Lake Silver Lake Comment
  CAS-BOT-BC318714  Hieracium horridum Wm. Bridge Cooke 1938-8-18 11492 Lassen Horse Camp slopes, Mount Shasta 2514 Comment
  CAS-BOT-BC318716  Hieracium horridum Alice Eastwood 1912-9-1 2056 Lassen Mount Shasta Comment
  HSC103617  Hieracium horridum Thomas W. Nelson, Jane Nelson 1985-8-10 8020 Lassen Along west side of Silver Lake. 1829 Comment
  CDA7975  Hieracium scouleri T. C. Fuller 1963-7-15 12904 Lassen Prescott Canyon, 2.5 miles north of Hayden Hill, ca. 15.5 miles south of Adin. 0 Comment
  UC20698  Hippuris vulgaris J. Burtt Davy Jun 17 1897-Jun 24 1897 3334 Lassen Honey Lake Valley, Honey Lake 1219 Comment
  CHSC6255  Holodiscus microphyllus var. glabrescens M. West 1946-7-7 Lassen Cone Lake near east border of Lassen Nat. Park. 1828 Comment
  JEPS114655  Holosteum umbellatum subsp. umbellatum Lowell Ahart, John Dittes 2008-6-20 14922 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
  JEPS118270  Holosteum umbellatum subsp. umbellatum Lowell Ahart, John Dittes 2011-6-20 17482 Lassen On the east bank 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
  JEPS120865  Holosteum umbellatum subsp. umbellatum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18728 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS87501  Holosteum umbellatum subsp. umbellatum Vernon H. Oswald and Lowell Ahart 1993-5-12 5390 Lassen Butte Lake Rd. 1.4 mi s Hwy 44 (between Old Station and Poison Lake); Butte Lake Rd., between Old Station and Poison Lake 1652 Comment
  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
  OBI77055  Hordeum brachyantherum Anthony Baniaga 2011-8-4 487 Lassen Lassen NF. About 1/2 mi WNW of Griffith Hill along 30n21. Swain Mtn quad. T30N R8E sec 8 NE of NW 1907 Comment
  UCD85277  Hordeum brachyantherum A. A. Beetle 1941-6-28 2800 Lassen 10 miles W of Chester. 1524 Comment
  UCD85479  Hordeum brachyantherum L. Whitney 1933-8-2 s.n. Lassen Near Slate Creek. 1889 Comment
  SEINET7297784 Image available Hordeum brachyantherum A. A. Beetle 1941-1 2818 Lassen 6 miles south of Ravendale, lower slopes of Observation Peak, open meadow. Comment
  UC53616  Hordeum brachyantherum subsp. brachyantherum J. Burtt Davy Jun 17 1897-Jun 24 1897 3366 Lassen Adobe Meadows Honey Lake Valley, Adobe Meadows Comment
  UCR244037  Hordeum murinum subsp. glaucum Jim Andre 1993-6-5 19707 Lassen Sierra Nevada/Great Basin, Honey Lake Valley, c. 3 mi. SE of Susanville, just south of airport 1256 Comment
  UC12398  Horkelia fusca subsp. parviflora M. S. Baker and Frank Nutting 1894-7-28 Lassen mtns to s Eagle Lake Comment
  SEINET10483367  Horkelia fusca subsp. tenella Mary Merello 1993-6-28 Merello 752 Lassen Lassen National Forest, Poison Lake. Along Hwy. 44 just south of the Hwy. 89, Hwy. 44 intersection. Open pine-scrub and wetlands around lake. Volcanic soils. 1700 Comment
  UC860563  Horkelia tridentata subsp. tridentata C. L. Hitchcock 1940-5-26 6597 Lassen ca 12 mi n Fall River (on Fall River) Comment
  CAS-BOT-BC537888  Horkelia tridentata var. flavescens A. M. Vollmer; L. Beane 1953-7-1 59 Lassen Along Halls Flat road, beginning 6 miles west of Susanville to McArthur 1554 Comment
  CHSC21234  Hydrophyllum capitatum var. alpinum F. Tom Griggs; Robert A. Schlising 1974-5-30 3135 Lassen West side of Colman Lake, at margins of meadow. 1950 Comment
  CHSC25089  Hydrophyllum capitatum var. alpinum K. R. Stern 1967-6-25 2428 Lassen Road to Eagle Lake Biological Station, Dean's Meadow near Gallatin Peak, ca. 3 mi. S of Eagle Lake. 1676 Comment
  CHSC30619  Hydrophyllum capitatum var. alpinum Eric Miller 1975-6-24 10 Lassen N. E. corner of Deans Meadow, 15 ft. off dirt road. 1956 Comment
  CHSC61156  Hydrophyllum capitatum var. alpinum Vernon H. Oswald; Lowell Ahart 1993-5-12 5378 Lassen Canal crossing Hwy. 44, 3.5 mi NW of A21 (to Westwood), at a large, meadowy flat. 1729 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
  UC1609439  Hydrophyllum capitatum var. alpinum Vernon H. Oswald and Lowell Ahart 1993-5-12 5378 Lassen 3.5 mi nw A21 (to Westwood) (canal crossing Hwy 44, n side of road and e side of canal, at a large meadowy flat) 1729 Comment
  RSA122624  Hydrophyllum capitatum var. alpinum L. R. Short 1936-4-28 S- 333 Lassen MDM, Burgess Spr. Exp. Range. 1753 Comment
  SJSU8059  Hypericum anagalloides J. W. Tilden 1960-6-27 1523 Lassen 5 mi E of Westwood via Moonlight Rd 1524 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
  POM86608  Hypericum formosum var. scouleri Marcus E. Jones 1897-6-18 s.n. Lassen Chat. [also Chats, a former settlement] 1524 Comment
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Mar 6 2011
  SD130459  Hypericum formosum var. scouleri John Thomas Howell, Gordon H. True and Margaret Williams 1973-6-28 49436 Lassen Elysian Valley, west of Janesville. 1326 Comment
  SEINET10720226  Hypericum perforatum Karen M. Meyer, Andrew Townesmith 2007-7-19 Meyer 140 Lassen Lassen National Forest. Ca. 0.2 mi. on 29N03, off Hwy. 36 on pullout just past a dry creek. 1459 Comment
  CAS-BOT-BC401310  Hypericum scouleri B. C. Cain 1925-8-24 87 Lassen 1 mile below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  HSC93315  Hypericum scouleri Vernon H. Oswald, L. Ahart 1996-8-1 8127 Lassen FS Rd. 28N56 (D-line), 2 mi. N of Dyer Mtn. Lookout, SSW of Westwood 1738 Comment
  UC117500  Idahoa scapigera T. S. Brandegee 1892-6-30 Lassen Susanville Comment
  UC729644  Ipomopsis aggregata Carl B. Wolf 1929-9-1 3785 Lassen betw Grassy and Snag Lakes Mt. Lassen National Park Comment
  HSC17038  Ipomopsis aggregata Fred J. Kindel 1955-6-28 Lassen Susan River Comment
  JEPS94604  Ipomopsis congesta subsp. congesta Vernon H. Oswald and Lowell Ahart 1997-5-27 8493 Lassen w side of Hwy 139 s Willow Creek Guard Station (0.9 mi s of Forest Rd. 38N04 to Coyote Flat) 1577 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
  CAS-BOT-BC69982  Isoetes bolanderi John Thomas Howell 1960-8-23 36431 Lassen Emerald Lake. 2468 Comment
  CHSC60804  Isoetes howellii Vernon H. Oswald 1993-6-28 5622 Lassen N of Hwy. 44 along Rd. 33N47 at the NE end of Little Harvey Valley, between Champs Flat and Harvey Valley, E of Poison Lake. 1737 Comment
  JEPS88085  Isoetes nuttallii Vernon H. Oswald and Lowell Ahart 1996-6-24 7848 Lassen 2.5 mi s Eagle Lake (ca 0.5 mi e of Eagle Lake Rd (A1), Papoose Meadows, w side of meadow just s of the cabins); Modoc Plateau 1633 Comment
  CHSC117178  Isoetes orcuttii Lowell Ahart; John Dittes 2016-6-7 21016 Lassen 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. 1397 Comment
  CHSC63380  Iva axillaris subsp. robustior Vernon H. Oswald 1994-7-8 6367 Lassen Willow Creek Wildlife Area on Hwy. 139, ca. 10 mi (air) N of Susanville. On levee roads and along this section of Hwy. 139. 1490 Comment
  RSA126721  Iva axillaris subsp. robustior Peter H. Raven, Otto T. Solbrig 1958-6-17 13265 Lassen Along Hwy 395, 11.8 miles NE of Litchfied Comment
  UC1037332  Iva axillaris subsp. robustior Leo Whitney 1934-9-5 1958 Lassen Fredonyer Pass; Lassen National Park 1676 Comment
  JEPS81018  Ivesia paniculata Thomas W. Nelson and Jane P. Nelson 1980-7-6 5984 Lassen 16 mi e Adin (along Adin-Madeline Rd); Ash Valley; Ash Valley, Lassen Co. 1554 Comment
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Nov 22 2007
  RSA614443  Ivesia paniculata M. L. Carlson 1996-6-11 s.n. Lassen 16 miles southeast of Adin on County Road 527 Comment
  SEINET3860195  Ivesia paniculata Thomas W. Nelson, Jane P. Nelson 1980-7-6 5984 Lassen Ash Valley along Adin-Madeline Rd., 16 mi E of Adin.; 0 1554 Comment
  SEINET3860245  Ivesia paniculata Barbara Kelly 1977-8-9 559 Lassen Along dirt road from Adin 16 1/4 mi W of Madeline.; 0 Comment
  UC1594844  Ivesia paniculata J. Stephen Shelly and Ginger V. King 1985-6-29 1029 Lassen Adin-Madeline Rd. Ash Valley (15.4 mi w of U.S. Hwy 395) 1554 Comment
  JEPS109644  Ivesia sericoleuca Dean W. Taylor 2002-6-21 18168 Lassen Elysian Valley (ca. 3 air miles West of Janesville), southerly middle border of the valley 1310 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
  SEINET11787326  Juncus bufonius A. Tiehm, Nachlinger, J.; Schoolcraft, G. 1984-1 8824 Lassen Rodeo Flat, 2.7 road mi W of state line on Buckhorn road from Ravendale to Hwy 81 1829 Comment
  CDA36732  Juncus bufonius var. occidentalis Barbara L. Wilson, Peter Zika 2011-8-7 16809 Lassen Highway 44 near mile post 12.50, at junction with road 32N22 and road to Harney Valley where route A21 crosses the railroad tracks north of Westwood. 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
  JEPS67093  Juncus confusus Brown and Wieslander 1922-7-23 69 Lassen Martin Springs Eagle Lake Comment
  RSA129757  Juncus confusus L. R. Short, J. Warren 1936-6-10 S- 418 Lassen MDM, Burgess Spr. Exp. Range. 1857 Comment
  JEPS87448  Juncus hemiendytus var. abjectus Vernon H. Oswald and Lowell Ahart 1993-6-3 5481 Lassen between Poison Lake and Susanville (s. side of Pine Creek Valley, Champs Flat Rd. (Lassen 105, Forest 32N28Y), where it diverges from Lassen 21 (32N02) to Eagle Lake); Pine Creek Valley 1725 Comment
  UC1608994  Juncus hemiendytus var. hemiendytus Vernon H. Oswald and Lowell Ahart 1993-6-3 5483 Lassen Champs Flat Rd (Lassen 105, Forest 32N28Y), 2.4 mi n of its jct with Lassen 21 (32N02) to Eagle Lake (on w edge of Pine Creek Valley, between Poison Lake and Susanville); Pine Creek Valley 1728 Comment
  HSC97877  Juncus hemiendytus var. hemiendytus Vernon H. Oswald, L. Ahart 1996-6-24 7852 Lassen Papoose Meadows, 0.5 mi. E of Eagle Lake Rd. (A1), 2.5 mi. S of Eagle Lake, Modoc Plateau 1634 Comment
  CHSC29855  Juncus nevadensis Kyle Brown 1978-7-10 95 Lassen In meadow at the base of the dam in Murrers Upper Meadow. 1548 Comment
  UC1553383  Juncus nevadensis G. Schoolcraft 1988-8-10 1849 Lassen 10 mi ne Susanville (along Hwy 139) 1505 Comment
  UC1601782  Juncus nevadensis J. Burtt Davy Jun 17 1897-Jun 24 1897 3279 Lassen Tule Confederacy Honey Lake Valley Comment
  JEPS103213  Juncus nevadensis G. Schoolcraft 1993-6-21 2301 Lassen North slopes of Skedaddle Mountains 1828 Comment
  CHSC112772  Juncus nevadensis var. nevadensis Lowell Ahart; John Dittes 2013-7-23 18906 Lassen On the southwest side of a man made pond, about 160 yards northwest of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  JEPS121289  Juncus nevadensis var. nevadensis Lowell Ahart, John Dittes 2013-7-23 18906 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
  RSA0035254  Juncus trilocularis Peter F. Zika 2008-7-14 23893 Lassen S side of Route 44, SE end of Grays Valley near Lodgepole, Cascade Range Highlands. 1730 Comment
  RSA712895  Juncus trilocularis L. P. Janeway 2005-7-3 8456 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
  UCD168847  Juncus trilocularis Barbara L. Wilson; P. Zika 2011-8-7 16807 Lassen Highway 44 near mile post 12.50, at junction with road 32N22 and road to Harvey Valley. 1740 Comment
  CHSC96722  Juncus xiphioides Gordon Leppig 1998-7-12 945 Lassen Modoc National Forest, Blue Lake Ranch. Peatland in large meadow complex. 1970 Comment
  HSC1211  Juniperus californica M. L. Stuart 1965-5-2 55 Lassen 2 mi. N of Termo on Hwy. 395 Comment
  UCD133732  Juniperus californica Grady L. Webster; with Bot. 102 class 1989-5-13 7703 Lassen Scattered in sagebrush scrub on rolling slopes 2.5 mi E of Beckworth Pass. 1493 Comment
  CAS-BOT-BC81148  Juniperus occidentalis Doris Kildale Gillespie 1930-5-12 9322 Lassen 2 miles north of Susanville on road to Alturas Comment
  HSC1271  Juniperus occidentalis R. H. Berg 1963-4-6 37 Lassen 10 mi. N of Susanville Comment
  UC1134311  Juniperus occidentalis C. G. Albertus 1935-11-1 294 Lassen 2.1 mi ene Chats; Sierraville Quad. 1569 Comment
  UC333780  Juniperus occidentalis unknown 1893-5-28 Lassen Susanville Comment
  UCD133784  Juniperus occidentalis K. M. Meyer; A. Townesmith 2007-7-19 132 Lassen Lassen National Forest. Ca. 0.2 mile on 29N03, off Hwy 36 on pullout just past a dry creek. 1459 Comment
  UCR4294  Juniperus occidentalis var. occidentalis Frank C. Vasek 1965-8-31 650831- 03 Lassen Calif. Hwy 139, 12.4 mi south of Adin Comment
  SEINET11056886  Juniperus occidentalis var. occidentalis D. Charlet 1993-7-13 1582 Lassen Fort Sage Mountains, along road W of OHV trailhead. 1450 Comment
  CAS-BOT-BC81289  Juniperus osteosperma John Thomas Howell 1961-9-25 36969 Lassen East side of Beckwourth Pass 1554 Comment
  JEPS107461  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
  UC1136816  Koeleria macrantha George A. Fischer and Irwin H. Johnson 1933-7-12 F 205 Lassen Grass Valley; Lassen National Forest, Grass Valley 1699 Comment
  UC506998  Koeleria macrantha George A. Fischer and Irwin H. Johnson 1933-7-12 F 205 Lassen Grass Valley; Lassen Forest, Grass Valley 1699 Comment
  CAS-BOT-BC271328  Koeleria pyramidata Gary Schoolcraft 1983-6-29 1042 Lassen Along Hwy 139 near Upper McBride Sp. 1889 Comment
  JEPS94084  Lactuca saligna Vernon H. Oswald and Lowell Ahart 1998-9-8 9574 Lassen Hwy. 299 at the R.R. overpass on e. side of Nubieber (near the hwy.) 1255 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
  CHSC117513  Lagophylla ramosissima Lowell Ahart; John Dittes 2016-7-13 21109 Lassen West of the pond, 80 yards east of Stonebreaker Road, 0.6 mile south of County Road A-2, 5.3 miles (air) east of Beiber, 7.3 miles 9air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CAS-BOT-BC341481  Lagophylla ramosissima Barrett Anderson 1986-7-9 3122 Lassen Road to Day, about 2.4 km N of Rte 299 1065 Comment
  CHSC106070  Lagophylla ramosissima subsp. ramosissima Lowell Ahart; John Dittes 2010-7-31 16997 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
  UC1573178  Lasthenia glaberrima Dean Wm. Taylor with Glenn L. Clifton, Rexford E. Palmer and Roy Buck 1988-6-6 9004 Lassen road from Bieber to Lookout (.5 mi s of the Modoc County Line); Pit River Watershed, Big Valley 1249 Comment
  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
  UC1924257  Lathyrus lanszwertii var. aridus Debra Valov 2004-5-31 2004230 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  POM277812  Lathyrus sulphureus Lyman Benson 1932-5-14 3584 Lassen Coarsegold 549 Comment
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Jul 2 2013
  CDA19744  Layia glandulosa D. Tillotson 1942-6-9 s.n. Lassen Modoc Plateau; Mud Flat. 0 Comment
  CHSC60718  Layia glandulosa Vernon H. Oswald; Lowell Ahart 1993-6-14 5535 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
  SEINET11447828 Image available Layia glandulosa F. B. Headley 1915-5-28 s.n. Lassen Honey lake Comment
  UC468843  Layia glandulosa Franklin P. Nutting Lassen Dixey Valley Comment
  UCSB30244  Layia glandulosa Hardham, Clare 1961-6-16 Lassen Gold Run Creek, south of Susanville Comment
  CAS-BOT-BC321492  Layia glandulosa P. Monnet 1913-7-4 822 Lassen Hot Springs Peak 2133 Comment
  RSA164325  Layia glandulosa subsp. glandulosa Clare B. Hardham 1961-6-16 7486 Lassen Gold Run Creek, south of Susanville. Plants of the Sierra Nevada Mountains. Comment
  CHSC99242  Lemna minuta Lowell Ahart; John Dittes 2008-6-22 15022 Lassen On shallow water, south side of the levee, about 50 yards east of the tall poles, mountain meadow, in Big Valley, about 3.5 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber. 1260 Comment
  CHSC4842  Lemna trisulca R. Carter 1967-7-13 591 Lassen 5 mi e of Eagle Lake Field Station, at point where rd comes nearest to Willow Cr. 1560 Comment
  UC1101282  Lemna turionifera Malcolm A. Nobs, S. Galen Smith 1949-8-20 1483 Lassen 1 mi n of Doyle (Honey Lake Valley, Long Creek); Honey Lake Valley, Long Creek Comment
  HSC95343  Lemna valdiviana Gordon Leppig, Juli Neander, Kai Neander 1997-7-26 697 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CAS-BOT-BC88740  Lepidium appelianum Mrs. H. C. Cantelow 1935-6-8 875 Lassen 6 miles north of Bieber. Comment
  HSC81481  Lepidium campestre Thomas W. Nelson, Jane P. Nelson 1980-7-6 6012 Lassen Along Adin-Madeline Rd., 15 mi. E of Adin in Ash Valley just beyond bridge at baths 1555 Comment
  CHSC99531  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
  CHSC111251  Lepidium perfoliatum L. P. Janeway; B. Castro 2012-7-2 10936 Lassen Modoc Plateau. Along Smoke Creek Ranch Road 6.9 road km east of Hwy 395. 1387 Comment
  CHSC36453  Lepidium perfoliatum Susan H. Euing 1982-6-2 7 Lassen Ca. 2 mi e jct Hwy 139 and Ravendale Rd., ca. 10 yds e of Ravendale Rd. Comment
  CHSC7710  Lepidium perfoliatum Beverley J. Wise 1969-4-13 36 Lassen 2.9 mi. east of Junction of Hwy 395 on Las. Co. Rd 338 (Amoke Creek Road). 1463 Comment
  CHSC91205  Lepidium perfoliatum Lowell Ahart; John Dittes 2005-6-2 11920 Lassen Along the road, near the Anderson Ranch home, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  UC1924234  Lepidium perfoliatum Debra Valov 2004-6-9 2004260 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1274 Comment
  UCD63910  Leptochloa fusca subsp. fascicularis Jesse V. Langdon 1954-10-14 Lassen Lassen Irrigation District, near Standish. Comment
  UCR17290  Leptodactylon pungens Frank C. Vasek 1975-7-11 750711- 16 Lassen Modoc Plateau, State Hwy 139, [Said Valley] 2 mi north of Grasshopper Valley at the junction with Termo Rd. 1650 Comment
  CHSC117207  Leptosiphon bolanderi Lowell Ahart; John Dittes 2016-6-7 20979 Lassen 10 yards west of the pond, 80 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  RSA31679  Leptosiphon harknessii A. A. Heller 1938-7-28 15299 Lassen About 2 miles east of Westwood. 1524 Comment
  CHSC68773  Leucocrinum montanum Vernon H. Oswald; Lowell Ahart 1997-5-27 8509 Lassen North of Susanville on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 0.3 mi east of Hwy. 139. 1560 Comment
  JEPS55592  Leucocrinum montanum W. Roderick 1961-5-3 Lassen ca. 4 road mi SE of Said Valley Reservoir and 17 road mi W of Termo Comment
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Aug 12 2008
  UC1553404  Leucocrinum montanum G. Schoolcraft 1988-5-11 1794 Lassen n of Said Valley Reservoir (along Hwy 139) 1676 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
  SEINET6170686  Leucophysalis nana G. Schoolcraft 1999-6-29 2849 Lassen E edge of Madeline Plains ca 9 mi NE of Ravendale 1615 Comment
  CHSC64848  Lewisia rediviva Vernon H. Oswald 1995-6-26 6946 Lassen Modoc Plateau. Coyote Flat on Hunzinger Flat Rd. (FS 38N04) 5.6 mi s of its junction with Ash Valley Rd. (Lassen 527). 1783 Comment
  CAS-BOT-BC444493  Lewisia triphylla George W. Gillett 1957-7-21 863 Lassen Lassen Volcanic National Park. Juniper Lake - Cameron Meadow trail 2118 Comment
  CAS-BOT-BC283770  Leymus cinereus John Thomas Howell 1973-7-10 49770 Lassen Near Westwood 1554 Comment
  JEPS68547  Leymus cinereus W. L. Jepson 1918-8-2 7795 a Lassen Raker Ranch Honey Lake Valley 1219 Comment
  UC584329  Leymus cinereus G. L. Stebbins Jr. and J. A. Jenkins 1937-7-8 2227 Lassen 6 mi s Ravendale 1660 Comment
  UCD32674  Leymus cinereus Beecher Crampton 1954-7-6 2078 Lassen Lassen County, 3 miles south of Ravendale. Comment
  CAS-BOT-BC274466  Leymus triticoides John Thomas Howell 1974-7-8 50467 Lassen Susanville 1295 Comment
  UC1037091  Leymus triticoides Leo Whitney 1933-7-5 2215 Lassen ca 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  UCD65614  Leymus triticoides L. Whitney 1933-8-4 s.n. Lassen Lassen National Forest. Near Sheepshead, 1889 Comment
  UCD87721  Leymus triticoides R. N. Raynor 1939-6-3 s.n. Lassen Susanville. Comment
  CAS-BOT-BC130512  Lilium pardalinum B. C. Cain 1925-8-24 99 Lassen 1 mi. below Drakesbad, Mt. Lassen Nat. Park 1645 Comment
  JEPS120859  Limosella acaulis Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18753 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS114652  Limosella aquatica Lowell Ahart, John Dittes 2008-6-20 14927 Lassen Bottom of vernal pools, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  POM312522  Limosella aquatica Malcolm A. Nobs, S. Galen Smith 1949-7-20 1046 Lassen Bieber, along Highway 299. Comment
  RSA772871  Limosella aquatica Robert F. Thorne, Larry E. DeBuhr 1975-8-22 47205 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  RSA0011457  Linanthus R. F. Thorne, Larry E. DeBuhr 1975-8-22 46973 Lassen Along Highway 395 ca. 6 miles north of Madeline and 4.5 miles south of Modoc county line. 1616 Comment
  JEPS58271  Linanthus bolanderi J. G. Lemmon May 1878 Lassen Susanville Comment
  UC1483841  Linanthus harknessii G. Schoolcraft 1980-7-16 314 Lassen near Nelson Corral Reservoir 1804 Comment
  SEINET10902894  Linanthus harknessii Mary Susan Taylor 1974-1 Taylor 290 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC106064  Linum lewisii var. lewisii Lowell Ahart; John Dittes 2010-7-31 16981 Lassen Dry meadow 10 yards northeast 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
  POM111784  Lipocarpha micrantha C. C. Bruce 1897-1 s.n. Lassen Susanville? Comment
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Jan 23 2011
  SEINET6032556  Lithophragma glabrum D. E. Brix 1962-5-2 s.n. Lassen Red Rock Road 1433 Comment
  POM92082  Lithophragma tenellum Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1924198  Lithospermum ruderale Debra Valov 2005-8-21 2005231 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1279 Comment
  JEPS15825  Lomatium bicolor var. leptocarpum M. S. Baker and Franklin P. Nutting 1894-6-20 Lassen near Bieber (Big Valley); Big Valley Comment
  UC1123089  Lomatium bicolor var. leptocarpum A. Simontacchi 1940-5-14 710 Lassen 10.2 mi E of Coyote Spring 1699 Comment
  CAS-BOT-BC211146  Lomatium grayi Mrs. C. C. Bruce 1898-6-1 2286 Lassen Madaline [Madeline] Plains Comment
  CHSC71064  Lomatium macrocarpum Vernon H. Oswald; Lowell Ahart 1998-5-22 9110 Lassen Road to ORV parking area in Fort Sage Mtns. 0.6 mi east of Fort Sage Rd., ca. 5 mi NNE of Doyle. 1402 Comment
  NY1160625  Lomatium macrocarpum N. H. Holmgren 1980-7-3 9487 Lassen U.S. Highway 395, 7.4 km (4.6 mi) south of Ravendale. 1620 Comment
  UCR183199  Lomatium macrocarpum Jim Andre, G. L. Clifton 1993-6-2 7717 Lassen Honey Lake, Honey Lake Valley, along Smoke Creek Valley Road, c. 10 mi west of the Nevada border, near Herlong Siding, south of Skedaddle Mtns 1243 Comment
  UCD127690  Lomatium macrocarpum Richard R. Halse 1977-5-22 1549 Lassen U.S. Highway 395, 9.5 miles north of Madeline. 1490 Comment
  UC1523794  Lomatium nevadense Gary Schoolcraft 1981-4-23 365 Lassen Ash Valley 1524 Comment
  UC1123084  Lomatium nevadense var. parishii A. Simontacchi 1940-5-10 689 A Lassen 7.3 mi. w. Havey Mt. Lookout (Lassen Nat'l Forest); , Halls Flat Quad. Comment
  CHSC118822  Lomatium nudicaule L. P. Janeway; B. Castro 2017-7-2 12338 Lassen Northern High Sierra Nevada. Along the crest of the Diamon Mtns 4.0 aiar-km west of Diamond Mtn; at the junstion of Skyline Motorway, Diamond Mtn Road, and Diamond Mtn Motorway. 2004 Comment
  CAS-BOT-BC217795  Lomatium ravenii B. Bartholomew; M. Gilbert; L. Skog 1993-5-13 6564 Lassen U.S. Hwy 395 6.0 km N of railroad crossing and 20.1 km N of Litchfield 1330 Comment
  CAS-BOT-BC217798  Lomatium ravenii G. Schoolcraft No date on label 212 Lassen North of Shaffer Mountain 1356 Comment
  CAS-BOT-BC217800  Lomatium ravenii David D. Keck; J. Clausen 1935-6-24 3738 Lassen 2 mi. S. of Ravendale 1464 Comment
  UC1228811 Image available Lomatium ravenii Lincoln Constance and Emil DiFulvio 1962-4-16 3747 Lassen 1 mi. s. Ravendale 1615 Comment
  UCR267419  Lomatium ravenii Jim Andre, Glenn L. Clifton 1993-6-14 30002 Lassen northeast base of Shaffer Mountain near Secret Creek, c. 20 mi east-northeast of Susanville 1646 Comment
  JEPS126472  Lomatium triternatum Lillie Pennington, Jillian Pastick, Rachael Payer, Andrea Stuemsky 2015-6-15 CA 350 -045 Lassen Take Ramhorn Road past campsite for approximately 10-15 miles. Turn left as the fork and continue on for about 3 miles. Comment
  POM78598  Lomatium triternatum Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin s Ranch. 1463 Comment
  SEINET7883783 Image available Lomatium triternatum Unknown 1986-1 86- 20 -1 Lassen Smoke Creek Rd., E of Hwy 395, T 30 N, R 16 E, Sec. 3 1433 Comment
  CHSC13733  Lomatium triternatum var. macrocarpum C. Freeman 1973-6-27 7 Lassen Collected roadside ca. 1 mi n of the road crossing. Comment
  UC1390555  Lomatium vaginatum Maynard Moe Aug 1970 278 Lassen about 0.6 mi S of Madeline (Hwy 395) 1615 Comment
  CHSC25907  Lotus K. R. Stern 1967-7-1 2464 Lassen Murrer Ranch, ca. 17 mi. NE of Susanville. Comment
  JEPS114702  Lotus denticulatus Lowell Ahart, John Dittes 2008-6-20 14970 Lassen About 100 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  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
  UC80952  Lotus nevadensis var. nevadensis T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  JEPS88234  Lotus oblongifolius var. oblongifolius Vernon H. Oswald and Lowell Ahart 1996-6-17 7818 Lassen ca. 7 mi. w. Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off of Hwy. 36, at 6.0 mi. post e. of Devils Corral Trailhead, Modoc Plateau); Modoc Plateau, Bizz Johnson Trail 1420 Comment
  UC15724  Lotus oblongifolius var. oblongifolius M. S. Baker and Frank Nutting 1894-7-21 Lassen near Eagle Lake 1524 Comment
  JEPS55772  Lotus purshianus var. purshianus Brown and Wieslander 1922-8-19 89 Lassen Martin Springs Eagle Lake Comment
  SEINET3559881 Image available Lotus tenuis Arthur Cronquist, Arthur H. Holmgren 1959-6-17 8474 Lassen Near Honey Lake, 1 mi SE of Milford, 26 mi SE of Susanville 1311 Comment
  CHSC110911  Ludwigia palustris Lowell Ahart; John Dittes 2012-7-9 18291 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC4980  Lupinus R, Cliquennoi 1967-6-30 36 Lassen 2 mi from Eagle Lake Biological Station abundant along roadside. 1554 Comment
  NY748272  Lupinus W. W. Eggleston 1910-9-3 6298 Lassen Vicinity of Doyle Station 1240 Comment
  RSA519408  Lupinus Rockwell 1925-7-1 s.n. Lassen Beckwith Comment
  UC1181563  Lupinus albifrons R. F. Hoover 1940-10-1 4650 Lassen Johnstonville Comment
  UC126936  Lupinus angustiflorus M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Leke Silver Lake Comment
  UC15769  Lupinus angustiflorus M. S. Baker and Frank Nutting 1894-7-30 Lassen Silver Lake Comment
  JEPS95013  Lupinus arbustus Vernon Oswald and Lowell Ahart 1997-6-24 8635 Lassen s of Susanville (near the small pond on crest of Diamond Mountain, about midway between Aspen Flat and Red Rock Lookout); crest of Diamond Mountain 2249 Comment
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Jun 8 2007
  UC727083  Lupinus arbustus A. A. Heller 1938-6-4 15142 Lassen just w Fredonyer Pass (e of Westwood); just w of Fredonyer Pass 1706 Comment
  UCD35731  Lupinus arbustus Beecher Crampton 1960-6-18 5724 Lassen Southern Warner Mtns., vicinity of Blue Lake Ranch; northeastern part of the county. 1981 Comment
  HSC63936  Lupinus arbustus subsp. calcaratus Teresa Prendusi 1980-7-21 Lassen Fredonyer Peak near summit 2393 Comment
  UCR119030  Lupinus argenteus subsp. argenteus Beecher Crampton 1954-7-6 2079 Lassen Modoc Plateau, Madeline. 1524 Comment
  CAS-BOT-BC196339  Lupinus argenteus var. argenteus John Thomas Howell 1934-6-10 11910 Lassen 2 miles s. of Madeline Comment
  CAS-BOT-BC208731  Lupinus argenteus var. heteranthus M. S. Taylor 1982-6-12 4653 Lassen Doyle, ca. 0.5 mi E of Hwy 395 Comment
  CAS-BOT-BC208747  Lupinus argenteus var. heteranthus John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49232 Lassen On Hwy. 395 NW of Doyle on road to Milford - Sierra Nevada 1280 Comment
  CAS-BOT-BC208751  Lupinus argenteus var. heteranthus John Thomas Howell 1934-7-10 12560 Lassen Black's Mt. Comment
  CAS-BOT-BC208761  Lupinus argenteus var. heteranthus Charles Piper Smith 1947-6-13 47443 Lassen Highway 299, Nubieber, 6.6 miles west. Comment
  CHSC99140  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
  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
  JEPS87397 Image available Lupinus argenteus var. heteranthus Vernon H. Oswald and Lowell Ahart 1993-6-14 5514 Lassen 3 mi w of Eagle Lake (0.5 mi sw of Spaulding Tract Rd (Rd 518, 33N889), Eagle Lake Road (Lassen A1)); Eagle Lake Road 1810 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
  NY736929  Lupinus argenteus var. heteranthus W. A. Archer 1938-6-16 6020 Lassen 5 miles west of Doyle Comment
  UC1137308  Lupinus argenteus var. heteranthus George A. Fischer and Irwin H. Johnson 1933-7-14 F- 265 Lassen Lassen Forest 1767 Comment
  UC127527  Lupinus argenteus var. heteranthus J. Burtt Davy Jun 17-24, 1897 Lassen Honey Lake Valley Comment
  UCD106809  Lupinus argenteus var. heteranthus R. N. Raynor 1939-6-3 s.n. Lassen Susanville. 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
  SEINET10484990  Lupinus brevicaulis Gary Schoolcraft 1980-5-30 Schoolcraft 246 Lassen Lassen co. T31n, r15e, se1/4, sec. 11. Elev. 4460'. On s side of rd. Into Diaz ranch at n end of mud flat. Associated with artemisia tridentata, Chrysothamnus spp., Sitanion hystrix. 1359 Comment
  CAS-BOT-BC196640  Lupinus breweri var. breweri Marcus E. Jones 1897-6-21 s.n. Lassen Chat 1615 Comment
  POM26869  Lupinus caudatus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  SD43491  Lupinus caudatus Philip A. Munz 1947-5-20 11888 Lassen Milford 1264 Comment
  RSA39736  Lupinus caudatus Philip A. Munz 1947-5-20 11888 Lassen Milford. 1265 Comment
  SEINET10490608  Lupinus caudatus subsp. caudatus Jeffrey Huber 1971-6-2 Huber 145 Lassen 6 mi. N of halleluja jct on us hwy 395, in artemisia tridentata, pinyon pine, Jeffrey pine along high ridge and in sandy wash. 1402 Comment
  SEINET530758  Lupinus caudatus var. caudatus Paul Opler 2006-6-9 Lassen Ash Valley Rd., 5.9 mi E of Adin. 1423 Comment
  JEPS95873  Lupinus grayi Vernon H. Oswald and L. Ahart 1999-6-9 9759 Lassen Between Westwood and Susanville on Hwy 36 1.3 mi east of Fredonyer Pass: T29N R10E NW1/4 Sect. 22, 5400 ft elevation, mixed coniferous forest 1645 Comment
  SFV18614  Lupinus lepidus var. confertus T. W. Nelson, J. P. Nelson 1990-7-14 8776 Lassen Along State Route CA-395 at Janesville Road. Lassen County Site #3. 1250 Comment
  UC1138211  Lupinus lepidus var. lobbii George A. Fischer and Irwin H. Johnson 1933-7-12 F 203 Lassen Grass Valley; Lassen National Forest, Grass Valley 1700 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
  UC506994  Lupinus leucophyllus George A. Fischer and Irwin H. Johnson 1933-7-12 204 Lassen Grass Valley. Comment
  JEPS103203  Lupinus leucophyllus G. Schoolcraft 1994-6-9 2347 Lassen 1 1/2 mile NE of Hwy 139 on Grasshopper-Termo Road 1615 Comment
  SEINET10452640  Lupinus meionanthus Taylor 1982-8-27 Taylor 5050 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
  JEPS114708  Lupinus microcarpus var. microcarpus Lowell Ahart, John Dittes 2008-6-20 14969 Lassen About 10 yards west of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  JEPS126528  Lupinus microcarpus var. microcarpus Lowell Ahart, John Dittes 2016-6-7 21018 Lassen On the west edge of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  CHSC5288  Lupinus obtusilobus 1944-7-26 Lassen Juniper Lake. 2055 Comment
  SBBG67020  Lupinus obtusilobus S. W. Hutchinson -Jun-1925 525 Lassen Eagle Lake 1554 Comment
  SEINET10450722  Lupinus obtusilobus Harold W. Rickett 1968-8-22 Rickett s.n. Lassen Collected in Lassen Volcanic National Park near the peak. In dry ground. Comment
  RSA0005617  Lupinus onustus Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  HSC76493  Lupinus polycarpus B. J. Cox, Paul Gallian 1971-6-2 2576 Lassen 6 mi. S of Adin, along Hwy. 139 right-of-way 1372 Comment
  SCFS2168  Lupinus polyphyllus var. burkei L. Loeblich 1964-6-30 63 Lassen 17.6 mi N of Susanville on Hwy 139 in ditch 2 m E of hwy 488 Comment
  JEPS127348  Lythrum hyssopifolia Lowell Ahart, John Dittes 2016-7-13 21125 Lassen 30 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  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
  RSA518407  Machaeranthera canescens var. canescens George K. Helmkamp 1990-10-4 M- 5 Lassen South of Susanville in Plumas National Forest; north of Milford Pass. 1463 Comment
  UC905682  Madia citrigracilis David D. Keck 1930-7-23 949 Lassen Susanville Sierra Nevada, Susanville 1280 Comment
  UC1567356  Madia citriodora G. Schoolcraft 1989-6-5 1897 Lassen intersection of Highway 139 and A2 s Adin 1341 Comment
  CAS-BOT-BC342656  Madia citriodora David D. Keck; J. Clausen 1935-6-25 3761 Lassen Susanville 1300 Comment
  SEINET11601338 Image available Madia elegans J. A. Young 1983-8-4 s.n. Lassen Janesville Comment
  CAS-BOT-BC343693  Madia elegans Elmer I. Applegate 1923-9-30 4034 Lassen Constantia Comment
  SD50990  Madia elegans Darley F. Howe 1960-9-21 Lassen 2 miles north of Janesville on #395 Comment
  POM29905  Madia elegans subsp. elegans Marcus E. Jones 1897-6-26 s.n. Lassen Susanville, Perkin's Ranch. 1463 Comment
  CAS-BOT-BC334689  Madia glomerata David D. Keck 1930-7-23 955 Lassen Fifteen miles west of Susan ville, Sierra Nevada 1524 Comment
  CAS-BOT-BC343058  Madia gracilis John Thomas Howell 1973-7-10 49781 Lassen Fredonyer Pass 1737 Comment
  CHSC44881  Madia gracilis Lowell Ahart; John Thomas Howell 1974-7-9 525 Lassen Along the edge of Eagle Lake Road, about 3 miles north-west of Susanville. 1584 Comment
  JEPS117590  Madia gracilis Lowell Ahart, John Dittes 2010-7-31 17006 Lassen Dry meadow on the bottom of a small wash, about 5 yards north of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin Comment
  RSA338583  Madia gracilis Noel Holmgren, Patricia K. Holmgren 1980-7-4 9497 Lassen Observation Peak, south base in upper Smoke Creek drainage, 19 km (12 mi) airline distance east-southeast of Ravendale. 1677 Comment
  CAS-BOT-BC343055  Madia gracilis David D. Keck 1930-7-23 949 Lassen Susanville 1280 Comment
  SJSU10452  Maianthemum stellatum H. L. Buckalew 1961-7-9 Lassen spring near Blue Lake, Warner Mts 1828 Comment
  CAS-BOT-BC347438  Malacothrix floccifera Clare B. Hardham 1969-8-28 17422 Lassen Slope west of Janesville Comment
  CHSC4978  Malva neglecta R. Clicquennoi 1967-6-23 11 Lassen In a large vernal pool area 1/4 mi n of Eagle Lake Biology Station, e central side of Eagle Lake. 1554 Comment
  UC18838  Malvella leprosa J. Burtt Davy Jun 17 1897-Jun 24 1897 3330 Lassen near the hot springs Honey Lake Valley 1219 Comment
  SEINET8894054  Malvella leprosa D. S. Mapes 1942-7-13 s.n. Lassen Mapes Ranch, Litchfield. 1067 Comment
  CAS-BOT-BC67834  Marsilea vestita R. K. Gierisch; D. H. Esplin 1969-8-25 3597 Lassen Harvey Valley 1676 Comment
  UCD18955  Marsilea vestita Raymond D. Ratliff 1965-7-22 23 Lassen Lassen National Forest, Harvey Valley Allot. (HV 78-73). 1706 Comment
  CHSC71221  Matricaria discoidea Vernon H. Oswald; Lowell Ahart 1998-6-4 9138 Lassen Red Rock Rd. at its junction with Hwy. 395 south of Constantia. 1365 Comment
  JEPS114634  Matricaria discoidea Lowell Ahart, John Dittes 2008-6-20 14911 Lassen On the levee road, where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  CDA8329  Matricaria occidentalis T. C. Fuller 1963-7-15 10886 Lassen East of road to Susanville, 2.2 miles southeast of Pittville. 0 Comment
  UCD86363  Melica bulbosa B. L. Kay 1961-6-28 s.n. Lassen 6 miles NW of Madeline. Comment
  SEINET208829 Image available Melica fugax Jack Major 1966-6-24 Lassen Modoc National Forest ; Long Valley 3 miles airline southwest of Patterson Guard Station northeastern Lassen County. 2088 Comment
  UC972185  Melica fugax Milo S. Baker 1952-5-23 12427 Lassen e of Chester (Highway 36) Comment
  UC972186  Melica fugax Milo S. Baker 1952-4-24 12411 Lassen ca 15 mi e Chester (at old road quarry) Comment
  CHSC115596  Mentha arvensis Lowell Ahart; John Dittes 2015-7-14 20337 Lassen On the west side of the road, about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1267 Comment
  CHSC7655  Mentzelia albicaulis Beverley J. Wise 1969-5-18 66 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. 1524 Comment
  JEPS107449  Mentzelia albicaulis Lowell Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4 1/4 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction 1433 Comment
  RSA715553  Mentzelia albicaulis L. Ahart, John Dittes 2005-6-1 11888 Lassen On the north side of Scott Road, Long Valley, about 4.25 miles (air) north of the intersection of Scott Road and Highway 70, 5.5 miles (air) northwest of Hallelujah Junction. 1434 Comment
  UCD55287  Mentzelia albicaulis Ellen Dean; Gary Schoolcraft 2006-5-16 3106 Lassen East of town of Susanville, along County Road A27 (Center Road). Private land north of California Correctional Facility owned by Virginia Johnston, to be purchased by state for expansion of alfalfa fields. 1244 Comment
  SD130461  Mentzelia albicaulis John Thomas Howell 8-9 Jul 1974 50466 Lassen Susanville Comment
  CHSC5299  Mentzelia congesta R. Gein 1946-6-25 Lassen Webb's Camp, Eagle Lake. 1554 Comment
  CHSC117298  Mentzelia dispersa Lowell Ahart; John Dittes 2016-7-13 21124 Lassen Sides of the overflow, about 50 yards north of the dam, 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC13851  Mentzelia dispersa J. Grove 1973-7-30 Lassen At Sugar Pine Basin. 1524 Comment
  UC1609316  Mentzelia dispersa Vernon H. Oswald and Lowell Ahart 1993-6-14 5511 Lassen ca 4 m (air) w Eagle Lake (1.0 m n of its jct. with Lassen A21, on the w edge of Brockman Flat Lava Beds.); Lassen A1 (Eagle Lake Rd.); SE 1/4 SW 1/4 1810 Comment
  UC506973  Mentzelia dispersa George A. Fischer, Irwin H. Johnson 1933-7-12 F 229 Lassen Lassen Forrest, Patterson Flat 1737 Comment
  CHSC7717  Mertensia longiflora Beverley J. Wise 1969-5-3 3 Lassen 12 mi. N.E. of Susanville on Lass. Co. Rd. 216 off Las. Co. Rd. 215. On bank of Willow Creek. 1554 Comment
  CAS-BOT-BC231081  Mertensia oblongifolia Margaret J. Williams; Gary Schoolcraft; Arnold Tiehm 1986-5-14 86- 39 -1 Lassen 1.5 mile W of turn to Dodge Reservoir, on road from Tuledad Canyon to Ravendale 1706 Comment
  SD8380  Micranthes bryophora Mrs. R. M. Austin 1882-8-7 Lassen Kings Valley Comment
  CAS-BOT-BC429080  Micranthes odontoloma George W. Gillett 1957-7-22 886 Lassen Lassen Volcanic National Park. Snag Lake. Near campsite at south end of Lake. 1850 Comment
  CHSC99239  Microseris laciniata subsp. laciniata Lowell Ahart; John Dittes 2008-6-22 15026 Lassen Open meadow area, about 50 yards southwest 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
  JEPS118158  Microseris laciniata subsp. laciniata Dean W. Taylor 2009-5-21 20606 Lassen Susanville; Susanville Peak, northerly flank along logging roads ca. 1.5 air miles E of Round Valley Reservoir 1706 Comment
  UC1136772  Microseris laciniata subsp. laciniata George A. Fischer and Irwin H. Johnson 1933-7-12 F- 195 Lassen Grass Valley (Dry Lake) Lassen National Forest 1694 Comment
  JEPS126531  Microseris nutans Lowell Ahart, John Dittes 2016-6-7 21022 Lassen About 10 yards west of State Highway 299, Big Valley Mountains, 0.4 mile (air) northeast of Big Valley Summit, 5.0 miles (air) southwest of Bieber. Comment
  POM34993  Microseris nutans Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CAS-BOT-BC349297  Microseris nutans Clarence R. Quick 1961-6-21 61 -34 Lassen 0.8 mile north off Road 1, Blacks Mountain Experimental Forest, northeast of Lassen Peak 1798 Comment
  CHSC29930  Microsteris gracilis Robin L. Ondricek 1978-6-20 65 Lassen Callatin Burn, 1.8 mi s of Five Corners. 2011 Comment
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Jan 31 2011
  SEINET4673741  Microsteris gracilis Leigh A. Johnson 1993-4-23 93 -004 Lassen Jct. HWY 395 and road to Ramhorn Campground and Painter Flat ca. 60 miles south of Alturis. 1650 Comment
  RSA122927  Microsteris gracilis subsp. gracilis Anonymous 1936-5-7 S- 343 Lassen Lassen National Forest, MDM, Burgess Spr. Exp. Range 1738 Comment
  RSA74070  Microsteris gracilis subsp. humilis Milo S. Baker 1952-5-23 12414 Lassen Highway 36, east of Chester Comment
  NY963937  Microsteris gracilis var. humilior V. E. Grant 1956-5-18 9802 Lassen About 8 miles south of Madeline 1280 Comment
  CDA41658  Mimulus breviflorus S. E. Schoenig 1998-7-5 98 -71 Lassen East side of Poison Lake, 50 meters west of Pitville Road, 1.8 miles northwest of Highway 44, east of railroad track and wet ditch. Comment
  UC1778584  Mimulus breviflorus S. E. Schoenig 1998-7-5 98 -71 Lassen Moist clayey soil. East side of Poison Lake, 50 meters W of Pitville Rd., 1.8 mi NW of Hwy 44. East of Railroad track and wet ditch. 1749 Comment
  UCD122430  Mimulus breviflorus S. E. Schoenig 1998-7-5 98- 71 Lassen East side of Poison Lake, 50 meters W of Pitville Rd., 1.8 mi NW of Hwy 44. East of Railroad track. 1749 Comment
  UC1037226  Mimulus breweri Leo Whitney 1933-8-14 1596 a Lassen ca. 8 mi nw Eagle Lake; Lassen National Forest, Slate Creek 1920 Comment
  JEPS88205  Mimulus breweri Vernon H. Oswald and Lowell Ahart 1996-6-24 7866 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake, Modoc Plateau, Montane Meadow in Yellow Pine Forest, on the W side of the meadow ca. 0.2 mi S of the cabin. 1633 Comment
  CHSC117277  Mimulus guttatus Lowell Ahart; John Dittes 2016-7-15 21224 Lassen On the west side of the road about 600 yards south of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UCR259342  Mimulus latidens Glenn L. Clifton 1996-6-18 34671 Lassen Highway 395 at Mud Flat [c. 10 miles due north of Honey Lake] 1348 Comment
  JEPS28704  Mimulus microphyllus George W. Gillett 1957-7-28 930 Lassen 1 mi above Butte Lake (on Widow Lake trail); Lassen Volcanic National Park 1905 Comment
  JEPS80675  Mimulus microphyllus L. R. Heckard and T. I. Chuang 1981-6-10 5527 Lassen 2.3 mi w Nubiebar (along route 299) 1341 Comment
  UC773851  Mimulus microphyllus L. R. Short and J. Warren 1936-6-10 S- 417 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1856 Comment
  UC1523772  Mimulus moniliformis Gary Schoolcraft 1981-6-25 475 Lassen Comment
  HSC22960  Mimulus nanus var. mephiticus John Pratt 1970-7-11 76 Lassen At base of Dyer Mtn lookout tower. Comment
  JEPS15594  Mimulus nanus var. nanus Milo S. Baker 1893-7-5 Lassen Dixey Valley Comment
  RSA536401  Mimulus nanus var. nanus Beth Corbin, Kim Earll, Steve Klukkert 1991-6-18 628 Lassen Grays Valley, ca. 4 mi NW of USFS Bogard Work Center. 1715 Comment
  RSA59745  Mimulus nanus var. nanus N. N. Thompson 1950-5-19 14786 Lassen 16.5 mi. W of Madeline on rd. from Adin. 1677 Comment
  RSA60367  Mimulus nanus var. nanus E. K. Balls 1950-5-9 15952 Lassen 6 miles south of Milford, Hwy 395. 1296 Comment
  JEPS97367  Mitella pentandra Vernon H. Oswald and L. Ahart 1995-7-24 7142 Lassen T31N R7E NW1/4 NW1/4 Sec. 24, 6250 ft, High Cascade Range, Red Fir Forest. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor 1905 Comment
  CHSC27650  Monardella odoratissima Cindy Prouty 1978-7-10 2 Lassen Colman L., several mi SE of Eagle L. 1962 Comment
  SEINET10498937  Monardella odoratissima Mary Susan Taylor 1974-1 Taylor 275 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CHSC5270  Monardella odoratissima subsp. glauca W. Vinyard 1946-6-11 Lassen Pine Creek. 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
  CHSC27651  Monardella odoratissima subsp. pallida N. E. Heiken 1978-7-27 94 Lassen Beneath Pine Creek Birdge, just W of fish trap. 1560 Comment
  CHSC29865  Monardella odoratissima subsp. pallida Robin L. Ondricek 1978-8-9 122 Lassen 1977 Burn, .1 mi w of intersection with road which passes Colman Lake. [Sanders 2010 annotation: Monardella odoratissima Benth. ssp. pallida X ssp. glauca.] 1889 Comment
  CAS-BOT-BC222146  Monardella odoratissima subsp. pallida A. E. Anderson 1967-7-13 92 Lassen Eastern slope of Dean's Ridge, 0.6 mi. s of Five Corners on road to Gallatin Beach 1676 Comment
  CHSC91315  Monolepis nuttalliana Lowell Ahart; John Dittes 2005-6-1 11897 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  CHSC99530  Monolepis nuttalliana Lowell Ahart; John Dittes 2008-6-22 15034 Lassen On the banks of a small natural drainage, about 120 yards west of the road levee, open meadow area, in Big Valley, about 2.1 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.0 miles (air) northeast of Bieber. 1262 Comment
  CHSC99537  Monolepis nuttalliana Lowell Ahart; John Dittes 2008-6-20 14973 Lassen 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
  JEPS28404  Montia chamissoi George W. Gillett 1957-7-28 932 Lassen 1 mi above Butte Lake (Lassen Volcanic National Park, Widow Lake Trail); Lassen Volcanic National Park, Widow Lake Trail 1905 Comment
  NY497723  Montia chamissoi N. H. Holmgren 1978-6-11 8917 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
  UC1101398  Montia chamissoi Malcolm A. Nobs, S. Galen Smith 1949-7-21 1064 Lassen 4 mi n of Madeline Comment
  UC1567410  Montia chamissoi G. Schoolcraft 1989-7-18 1983 Lassen near Buck's Spring (s of Clark's Valley Road) 1874 Comment
  CHSC108024  Montia linearis Lowell Ahart; John Dittes 2011-6-20 17476 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
  RSA715990  Montia linearis L. Ahart, John Dittes 2005-6-2 11956 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-BC445067  Montia linearis Clarence R. Quick 1962-6-17 62 -20 Lassen Swains Hole, south of Blacks Mountain Experimental Station 1554 Comment
  JEPS70578  Muhlenbergia asperifolia W. L. Jepson 1918-8-2 7780 Lassen seepage swale below spring Beckwith Pass 1463 Comment
  UCD86548  Muhlenbergia asperifolia John Thomas Howell; Gordon H. True 1973-8-1 50147 Lassen Roadside in Mountain Meadows east of Westwood. 1554 Comment
  CDA32541  Muhlenbergia filiformis Gordon Leppig 1998-7-12 958 Lassen Northern California Peatlands; Modoc National Forest, Blue Lake Ranch. Comment
  HSC63924  Muhlenbergia filiformis Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  UC1024665  Muhlenbergia filiformis Leo Whitney 1934-8-15 2184 Lassen near Bridge Creek (ca 7-8 mi sw of Eagle Lake); Lassen National Forest, Bridge Creek Camp 1737 Comment
  SD109577  Muhlenbergia jonesii John R. Reeder, Charlotte G. Reeder 1972-7-24 5809 Lassen 22 miles NW of Susanville in vicinity of Silver Lake, along State Hwy. 44, Lassen National Forest 1707 Comment
  CAS-BOT-BC275082  Muhlenbergia richardsonis Malcom A. Nobs; S. Galen Smith 1949-7-21 1060 Lassen 4 miles N of Madeline Comment
  CHSC58862  Muhlenbergia richardsonis Vernon H. Oswald; Lowell Ahart 1992-7-16 5105 Lassen Long Lake on the S side of Hwy. 44 between Old Station and Susanville, 1.2 mi SE of County Rd. A21. On the margin of the lake. 1745 Comment
  JEPS28263  Muhlenbergia richardsonis George W. Gillett 1957-7-22 871 Lassen s shore of lake Lassen Volcanic National Park, Snag Lake (margin of gravel bars) 1850 Comment
  RSA129676  Muhlenbergia richardsonis G. A. Fischer, Irwin Johnson 1933-7-12 F- 224 Lassen Lassen National Forest; Stringer Meadow. 1723 Comment
  SJSU4296  Muhlenbergia richardsonis J. W. Tilden 1960-6-27 1511 Lassen outskirts of Westwood, foot of Moonlight Rd 1524 Comment
  UCD86950  Muhlenbergia richardsonis R. M. Love 1940-7-5 s.n. Lassen Madeline Plains. Comment
  UCR197924  Muhlenbergia richardsonis Beecher Crampton 1954-7-6 2073 Lassen Modoc Plateau, 17 miles south of Ravendale along US highway 395. 1524 Comment
  JEPS107308  Myosotis discolor Lowell Ahart, John Dittes 2005-6-1 11896 Lassen On the south side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction 1459 Comment
  JEPS96136  Myosotis discolor Vernon H. Oswald and Lowell Ahart 1996-6-24 7880 Lassen ca. 0.5 mi. e. of Eagle Lake Rd. (A1) and 2.5 mi. s. of Eagle lake (Papoose Meadows, along Papoose Creek where it leaves the n. end of the meadow); Modoc Plateau, Papoose Meadows, Papoose Creek 1633 Comment
  CAS-BOT-BC392253  Myosurus apetalus G. Schoolcraft 1993-6-10 2290 Lassen N. of Clark's Valley Rd. e. of Red Rock Lake 1828 Comment
  UC1126101  Myosurus apetalus A. Simontacchi 1940-5-17 739 Lassen 5.9 mi s Patterson Mtn; Lassen National Forest 1706 Comment
  UC1143006  Myosurus apetalus August L. Hormay 1934-5-14 Lassen Gray's Flat Well; Lassen National Forest 1706 Comment
  CHSC68868  Myosurus apetalus var. borealis Vernon Oswald; Lowell Ahart 1997-6-24 8651 Lassen South of Susanville just south of the small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. In a meadow. 2249 Comment
  OBI76991  Myosurus apetalus var. borealis Anthony Baniaga 2011-6-10 325 Lassen Lassen/Modoc County. On the S side of Hwy 299, ca. 1.2 mi E of Lassen County rd 428. 1295 Comment
  CAS-BOT-BC83319  Myosurus minimus Peter H. Raven; Otto Thomas Solbrig 1958-6-17 13285 Lassen Along United States Highway 395, 1.9 miles south of Ravendale. Comment
  CHSC112462  Myosurus minimus Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18726 Lassen About 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC99498  Myosurus minimus Lowell Ahart; John Dittes 2008-6-20 14940 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
  JEPS120862  Myosurus minimus Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18726 Lassen About 30 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  SEINET231810 Image available Myriophyllum sibiricum A. Tiehm, G Schoolcraft 1984-8-14 9243 Lassen Buckhorn Reservoir on S side of Buckhorn rd to Ravendale about 6 rd mi W of the state line. 1698 Comment
  RSA338411  Myriophyllum spicatum Robert F. Thorne, C. W. Tilforth 1969-9-5 39132 Lassen Said Valley Reservoir, near junction of Termo-Grasshopper Rd. & Hwy 139. 1433 Comment
  HSC22985  Nama aretioides John Pratt 1970-7-5 67 Lassen 1250 Comment
  CHSC65036  Nama aretioides var. californica Vernon H. Oswald; Lowell Ahart 1995-7-5 6955 Lassen Modoc Plateau. North of Honey Lake on Smoke Creek Ranch Rd., 4.0 mi e of Hwy 395. 1383 Comment
  UC1609382  Nama densa var. densa Vernon H. Oswald and Lowell Ahart 1993-7-8 5658 Lassen Pittville Road (Lassen 111, 36N01) 1.9 mi n of Highway 44 (on se edge of Poison Lake); se edge Poison Lake, Pittville Road 1709 Comment
  UC735061  Nama densa var. densa Lincoln Constance 1946-7-3 3098 Lassen w edge of Eagle Lake at Spauldings Eagle Lake; w edge of Eagle Lake at Spaldings 1706 Comment
  CHSC9067  Navarretia Silas Carr 1970-6-24 126 Lassen E. edge of road entering N. portion of Murrers Meadow. Comment
  RSA0011554  Navarretia R. F. Thorne, Larry E. DeBuhr 1975-8-22 46988 Lassen Along Highway 395 ca. 5 miles north of Madeline and ca. 5.5 miles south of Modoc county line. 1616 Comment
  CHSC45356  Navarretia breweri Vernon Oswald 1986-5-28 2058 Lassen Hwy 139 between Eagle Lake and Adin, 32.0 mi n of Susanville. 1630 Comment
  RSA128291  Navarretia breweri P. H. Raven, Otto T. Solbrig 1958-6-17 13283 Lassen Along U.S. Hwy 395, 1.9 miles S of Ravendale. Comment
  NY1012729  Navarretia breweri G. Schoolcraft 1983-6-28 1034 Lassen Eastern slopes of Amedee Mountains 1890 Comment
  SEINET11268213  Navarretia breweri Vernon H. Oswald, Lowell Ahart 1993-6-28 5592 Lassen Harvey Valley Rd. (33N02), 1.7 mi N of Hwy 44, E side of Grays Valley, E of Poison Lake.; 0 1719 Comment
  SJSU8608  Navarretia breweri P. L. Billings 1965-7-12 Lassen by Hwy 139 5 mi NE of Susanville 1158 Comment
  CHSC23850  Navarretia divaricata subsp. vividior K. R. Stern 1974-6-22 5850 B Lassen E side of Hwy. 139, ca. 2 mi s of Termo-Grasshopper Road and ca. 44 mi n of Susanville. Comment
  CHSC23861  Navarretia intertexta subsp. propinqua A. W. Harvilik 1967-7-7 38 Lassen Collected on hwy. 139 ca. 6 mi from Susanville. 1463 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
  JEPS121307  Navarretia intertexta subsp. propinqua Lowell Ahart 2013-7-22 18853 Lassen 10 yards S of a man-made pond, about 140 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1594648  Navarretia intertexta subsp. propinqua Vernon H. Oswald and Lowell Ahart 1992-7-16 5101 Lassen 1.2 mi se County Rd. A21 (Long Lake on the s of Hwy 44, between Old Station and Susanville); Long Lake 1745 Comment
  UCD32653  Navarretia intertexta subsp. propinqua Beecher Crampton 1954-7-5 2047 Lassen Lassen County, 4.5 miles west of Susanville, along state highway 36. 1432 Comment
  RSA91887  Navarretia intertexta subsp. propinqua Beecher Crampton 1954-7-5 2047 Lassen State Highway 36, 4.5 miles west of Susanville 1433 Comment
  CHSC6202  Navarretia leptalea J. B. Kimsey 1946-6-26 Lassen Pine Creek, Eagle Lake. 1615 Comment
  UC909068  Navarretia leucocephala subsp. bakeri G. L. Stebbins Jr. 1949-8-6 4003 b Lassen between Susanville and McArthur (edge of Feather Lake); Feather Lake 1676 Comment
  CHSC67574  Navarretia leucocephala subsp. leucocephala James Jokerst 1983-7-24 1878 Lassen Near madeline Plains. Vernal pool. 1614 Comment
  CHSC6209  Navarretia leucocephala subsp. minima J. B. Kimsey 1946-6-11 Lassen Pine Creek near Eagle Lake. 1554 Comment
  HSC63964  Navarretia leucocephala subsp. minima Teresa Prendusi 1980-7-1 Lassen Champs Flat, 8 mi. W of N Eagle Lake. 1677 Comment
  JEPS114396  Navarretia leucocephala subsp. minima Lowell Ahart, John Dittes 2008-6-20 14952 Lassen about 100 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7.0 miles (air) northeast of Bieber 1263 Comment
  UC1191630  Navarretia leucocephala subsp. minima Malcolm A. Nobs and S. Galen Smith 1949-5-29 756 Lassen Nubieber, on the Great Northern Railway Nubieber Comment
  UC1228161  Navarretia leucocephala subsp. minima Beecher Crampton 1960-6-20 5731 Lassen 0.5 mi s Black Mtn. exper. Sta. U.S.D.A. Forest Service (11 mi nw Bogard Ranger Sta); Lassen National Forest 1706 Comment
  UC23681  Navarretia leucocephala subsp. minima J. Burtt Davy Jun 17 1897-Jun 24 1897 3362 Lassen Honey Lake Valley Comment
  CAS-BOT-BC230383  Navarretia leucocephala subsp. minima Beecher Crampton 1960-6-20 5731 Lassen 0.5 mile S of Black's Mountain Experiment Station, USDA Forest Service, Lassen National Forest 1706 Comment
  SEINET2440299  Navarretia linearifolia subsp. linearifolia Leigh A. Johnson 2005-7-28 05 -222 Lassen Lassen Natl. Forest, NE Long Lake vicinity. Off Hwy 44 at mile marker 20.74. At junction of spur road 31N01 leading from Hwy 44 and 31N51, which runs along NE edge of lake.; 0 1727 Comment
  UC1178962  Navarretia linearifolia subsp. linearifolia Herbert L. Mason Jul 29 1955-Jul 31 1955 14643 Lassen near Westwood Junction (railroad station 15 mi w Susanville) (southern Lassen County); w of Susanville, near Westwood Junction Comment
  UC1609451  Navarretia linearifolia subsp. linearifolia Vernon H. Oswald and Lowell Ahart 1993-6-28 5616 Lassen on Rd 33N06 n Hwy 44 (sse flank of mt., nne of Burgess Meadow, ne of Poison Lake); Harvey Mtn. 1798 Comment
  CHSC115600  Navarretia sinistra subsp. sinistra Lowell Ahart; John Dittes 2015-7-14 20521 Lassen Northwest of the pond, east part of the camping area, west side of Childs Meadow, 0.67 air-miles west of intersection of State Highway 36 and Wilson Lake Road (County Road 769), 1.21 air-miles southeast east of Doe Mt., 10.41 air-miles south of Lassen Peak. 1498 Comment
  CAS-BOT-BC219366  Nemophila Louella Bass 1973-4-15 26 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC231218  Nemophila parviflora var. austiniae Philip A. Munz 1947-5-18 11860 Lassen Fredonyer Forest Campground on Highway 36, W of Susanville 1508 Comment
  CHSC107325  Nemophila pedunculata Lowell Ahart; John Dittes 2011-6-20 17481 Lassen On old gopher mounds, meadow, about 15 yards east of the stream, about 40 yards south of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1609375  Nemophila pedunculata Vernon Oswald and Lowell Ahart 1993-5-12 5389 Lassen 1.6 mi se Pittsville Rd. (Hwy 44 between Poison Lake and A21 (to Westwood)); betw Poison Lake and A21 1719 Comment
  SEINET10756782  Nestotus stenophyllus Billy Joe Cox 1971-6-2 Cox 3105 Lassen Approx. 30 mi. N of Susanville, on CA Hwy. 139, in basalt. 1646 Comment
  CHSC13638  Nicotiana attenuata M. S. Taylor 1974-6-20 269 Lassen On Pelican Point, off e shore of Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  SEINET10832656  Nicotiana attenuata Mary Susan Taylor 1974-1 Taylor 270 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  UCD126693  Nicotiana attenuata Gerald Dickinson 1963-7-17 108 Lassen at entrance of Eagle Lake recreation site, Highway 139. 1559 Comment
  HSC4506  Nitrophila occidentalis Fred J. Kindel 1955-7-14 Lassen Wendel Comment
  UC1924578  Nothocalais troximoides Debra Valov 2006-5-29 2006029 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1285 Comment
  UCD50215  Nymphaea odorata subsp. tuberosa Daniel B. Marcum 2004-6-1 s.n. Lassen Near warm spring in the Fall River Valley, Lassen County. 1005 Comment
  HSC31754  Oenothera cespitosa var. marginata Donald Spalinger 1974-5-16 65 Lassen E of Hurlong in the Doyle Winter Deer Range 1220 Comment
  JEPS124825 Image available Oenothera deltoides C. Meek 1969-7-8 68 Lassen Along Hi #395, 1 mi south of intersection to Herlong Army Depot, 8 mi. south of Milford. Comment
  UCD106858  Oenothera deltoides R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  CHSC36283  Oenothera deltoides subsp. piperi M. S. Taylor 1982-6-12 4652 Lassen Both sides of Hwy 395, ca. 1 mi n of Milford. 1280 Comment
  NY998638  Oenothera deltoides var. piperi W. W. Eggleston 1911-9-3 7705 Lassen Vicinity of Doyle Station 1290 Comment
  SEINET5345714  Oenothera deltoides var. piperi P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CAS-BOT-BC349945  Onopordum acanthium O. Havens 1963-8-9 s.n. Lassen P. S. Hall ranch, Doyle Comment
  SEINET6188292  Oreocarya schoolcraftii G. Schoolcraft 1999-7-12 2858 Lassen N. of Tuledad Canyon near NV stateline. 1737 Comment
  CAS-BOT-BC350043  Oreostemma alpigenum var. andersonii Alice Eastwood 1912-8-22 1845 Lassen Foot of Lassen Butte, Lassen Butte Region Comment
  CHSC105235  Orobanche californica subsp. jepsonii Lowell Ahart; John Dittes 2010-7-31 16985 A Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1136756  Orobanche corymbosa subsp. corymbosa L. R. Short and J. Warren 1936-6-30 S- 465 Lassen NW of Eagle Lake, Burgess Spring Experiment Range. Comment
  UC1561410  Orobanche corymbosa subsp. corymbosa Barbara Ertter 1987-7-25 7315 Lassen Ca 27 air miles NW of Susanville, FR33N02 to Harvey Valley W of junction with FR33N04. Comment
  CAS-BOT-BC499906  Orobanche fasciculata Clare B. Hardham no date on label; det'd 1980. s.n. Lassen Sierra Nevada: Gold Rush Creek, S of Susanville Comment
  HSC24668  Orobanche vallicola John Pratt 1970-7-5 64 Lassen 1250 Comment
  SD52193  Orthocarpus copelandii var. cryptanthus F. Stephens 1894-7-15 8115 Lassen Bunch Grass Spring Comment
  CHSC59821  Orthocarpus cuspidatus subsp. cryptanthus Mary Meyer 1980-7-8 Lassen 1706 Comment
  CHSC60858  Orthocarpus cuspidatus subsp. cryptanthus Vernon H. Oswald; Lowell Ahart 1993-6-28 5604 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. 1725 Comment
  UC1137581  Orthocarpus cuspidatus subsp. cryptanthus A. Simontacchi 1940-7-8 926 Lassen 5.2 mi s Jelly Camp; Lassen National Forest, Halls Flat Quadrangle Comment
  UC1609287  Orthocarpus cuspidatus subsp. cryptanthus Vernon H. Oswald and Lowell Ahart 1993-6-28 5604 Lassen Rd 35N04 at Aspen Well (n of Hwy 44 on nw edge of valley, ne of Poison Lake); Harvey Valley, ne of Poison lake 1725 Comment
  POM44256  Orthocarpus hispidus Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  RSA715624  Orthocarpus hispidus L. Ahart, John Dittes 2005-6-1 11902 Lassen North side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 mile (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah junction. 1460 Comment
  RSA0089259  Orthocarpus purpurascens Bonnie C. Templeton 1938-4-15 s.n. Lassen Near Roscoe. Comment
  UC1483840  Osmorhiza berteroi G. Schoolcraft 1979-8-2 178 Lassen Tule Mountain; top, Bureau of Land Management 2133 Comment
  NY404460  Oxytheca dendroidea subsp. dendroidea G. Schoolcraft 1985-7-29 1493 Lassen West slopes of Fort Sage Mountains; 26-17-27 1585.0 Comment
  CHSC35585  Packera cana G. Schoolcraft 1979-7-11 143 Lassen South face of Observation Peak. 2316 Comment
  CHSC63381  Packera cana Vernon H. Oswald; Beth Corbin, Michael Dolan 1994-6-18 6312 Lassen Clarks Valley Rd. (Lassen 510) ca. 9 mi E of Madeline. 1859 Comment
  HSC69079  Packera cana Gary Schoolcraft 1979-7-11 143 Lassen S-face of Observation Peak 2317 Comment
  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
  CHSC5217  Packera multilobata A. Santos 1946-6-17 Lassen Eagle Lake. Mr. Fredonyer Rd. 2072 Comment
  CHSC93246  Packera streptanthifolia John Dittes; Scott Chamberlain 2004-6-28 1011 Lassen Modoc Plateau; Long Valley; ca. 2.0 air-miles northeast of Hwy 70 at Beckwourth Pass, ca. 3.0 air-miles west of Hwy 395, ca. 0.9 air-mile east of Plumas County line; meadow. 1448 Comment
  CAS-BOT-BC10386  Paeonia brownii J. T. Howell 1955-7-19 30820 Lassen East side of Beckwourth Pass 1493 Comment
  CAS-BOT-BC10429  Paeonia brownii J. T. Howell 1934-6-14 12146 Lassen Near Lost Lake, Warner Mountains 2438 Comment
  CHSC29926  Paeonia brownii Robin L. Ondricek 1978-6-6 80 Lassen Deans Meadow. 1950 Comment
  UC485769  Paeonia brownii H. E. and S. T. Parks June, 1928 223 Lassen Drakesbad Lassen National Park Comment
  HSC63735  Paeonia brownii Teresa Prendusi 1980-4-22 Lassen Along State Rte. 139, 0.5 mi. NE of Susanville 1280 Comment
  RSA59891  Paeonia brownii E. K. Balls 1950-5-19 14774 Lassen Above Ash Creek Public Camp, off rd. from Adin to Madeline 1585 Comment
  CHSC13509  Panicum J. Pitts 1972-6-23 271 Lassen 50 yds. n of Eagle Lake Biology Station. 1524 Comment
  CHSC93670  Panicum capillare Lowell Ahart; John Dittes 2005-6-2 11973 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  RSA126977  Panicum capillare H. S. Yates 1936-8-11 6073 Lassen Baxter Creek 1280 Comment
  SEINET4691127  Panicum capillare A. Tiehm 1980-1 5759 Lassen Amedee Hot Springs, north end of Honey Lake Valley, 4 air miles SE of Wendel 1220 Comment
  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
  JEPS94120  Pectocarya penicillata Vernon H. Oswald and Lowell Ahart 1998-5-22 9092 Lassen Hwy. 395 at intermittent drainage crossing the rd. 2.3 mi. s. Milford 1255 Comment
  SEINET10456342  Pectocarya penicillata David B. Dunn, Jeffrey Huber 1971-6-2 Dunn 17750 Lassen 3 mi. S of Hallelujah Jct, on US Hwy 395, jct of US 395 & CA 70. Comment
  UC79157  Pectocarya setosa T. S. Brandegee 1892-6-22 Lassen Honey Lake Comment
  CAS-BOT-BC7094  Pedicularis attollens subsp. protogyna Francis Whittier Pennell 1940-6-10 25771 Lassen Route 36 road to Coppervale R.S., E of Westwood Comment
  UCR267420  Pedicularis centranthera Jim Andre, Glenn L. Clifton 1993-6-14 30003 Lassen northeast base of Shaffer Mountain near Secret Creek, c. 20 mi east-northeast of Susanville 1646 Comment
  CHSC68879  Pedicularis groenlandica Vernon Oswald; Lowell Ahart 1997-6-24 8652 Lassen South of Susanville just south of small pond on the crest of Diamond Mtn., about midway between Aspen Flat and Red Rock Lookout. 2249 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
  SEINET10549211  Pedicularis semibarbata Mary Merello 1993-6-28 Merello 754 Lassen Lassen National Forest. Along Forest Service Road 33N02 to Harvey Mountain Lookout and Harvey Valley. Open pine scrub and sagebrush woodland. 1740 Comment
  SEINET3836472 Image available Pedicularis semibarbata Marcus E. Jones 1897-6-28 Lassen Diamond Mt. Susanville, Perkin's Ranch 1829 Comment
  JEPS27949  Penstemon davidsonii var. davidsonii Frances D. Payne 1929-7-12 82 Lassen above Camp 1, N of Lost Lake Warner Range, E slope of southern end 2286 Comment
  CHSC80281  Penstemon deustus Jeanne Boze 1981-6-12 119 Lassen 0.25 mi south of Eagle Lake Field Station. 1615 Comment
  RSA715656  Penstemon deustus subsp. heterander L. Ahart, John Dittes 2005-6-2 11979 Lassen North side of a poor dirt road, Long Valley, about 4.5 mi. (air) northeast of the intersection of Scott Rd. and Highway 70, 5.7 mi. (air) northwest of Halleluiah Junction. 1411 Comment
  POM252931  Penstemon deustus subsp. sudans A. A. Heller 1938-6-23 15194 Lassen East of Fredonyer Pass on Hwy 36. 1646 Comment
  CHSC5900  Penstemon deustus var. pedicellatus W. Vinyard 1946-6-10 Lassen Eagle Lake. Pelican Point. 1554 Comment
  RSA537557  Penstemon gracilentus Barbara Ertter 1988-7-25 7866 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2256 Comment
  UC1583940  Penstemon gracilentus G. Schoolcraft 1990-7-9 2109 Lassen e slope of Tule Mtn. 1767 Comment
  SEINET5328215 Image available Penstemon gracilentus G. Schoolcraft 1994-7-7 2370 Lassen about 1 mi W of Boot Lake 235 Comment
  CHSC1867  Penstemon neotericus V. Holt 1943-8-1 Lassen Westwood. 1463 Comment
  UC1523710  Penstemon neotericus Gary Schoolcraft 1981-7-9 502 Lassen e slope of Roop Mtn. Comment
  UC725482  Penstemon neotericus A. A. Heller 1938-7-28 15294 Lassen w Westwood; w of Westwood 1524 Comment
  POM172676  Penstemon newberryi subsp. newberryi Franklin Nutting 1894-7-30 s.n. Lassen Silver Lake. Comment
  NY640119  Penstemon procerus var. procerus N. H. Holmgren 1978-6-11 8914 Lassen Vicinity of spring at fork to Painters Flat on east side of Observation Peak, 28 km (17.4 miles) east of Ravendale and 22.5 km (14 miles) airline distance 1680 Comment
  CHSC4267  Penstemon roezlii K. R. Stern 1967-6-24 2417 Lassen Murrer Meadow Road, ca. 3 mi. E of Eagle Lake Biological Station. 1554 Comment
  CHSC68883  Penstemon roezlii Vernon Oswald; Lowell Ahart 1997-6-24 8623 .1 Lassen South of Susanville on the north side of Diamond Mtn. on Forest Rd. 21N52, 1.0 mi southwest of its junction with 29N43. 2164 Comment
  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
  NY650101  Penstemon roezlii T. W. Nelson 1980-7-6 6021 Lassen Adin Quad. Along Adin-Madeline road ca. 0.5 mile west of Moll Reservoir. 1585.0 Comment
  UC690374  Penstemon roezlii David D. Keck and J. Clausen 1935-6-24 3727 Lassen 5 mi s Likely ((Modoc Co.)); s of Likely 1400 Comment
  RSA299199  Penstemon roezlii J. T. Howell, Gordon H. True, Wayne Dakan 1974-7-30 50689 Lassen South and southeast of Diamond Mtn. 2226 Comment
  CAS-BOT-BC239494  Penstemon rydbergii var. oreocharis Lassen 1927 G. S. Crew 1927-7-1 49 Lassen Lassen National Forest, Bogard R.S. pasture 1712 Comment
  CAS-BOT-BC239499  Penstemon rydbergii var. oreocharis Francis W. Pennell 1940-6-10 25774 Lassen Route 36, road to Coppervale R.S., E. of Westwood 1493 Comment
  CAS-BOT-BC239502  Penstemon rydbergii var. oreocharis Al Simontacchi 1940-6-3 792 Lassen Lassen National Forest, 8.3 miles SE of Alcohol Jacks Cabin 1706 Comment
  CAS-BOT-BC239510  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen About 4 miles east of Westwood 1432 Comment
  HSC81544  Penstemon rydbergii var. oreocharis Thomas W. Nelson, Jane Nelson 1980-7-6 6046 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  JEPS11475  Penstemon rydbergii var. oreocharis Brown and Wieslander 1922-7-18 50 Lassen Eagle Lake , Eagle Lake (Martin Sprs) Comment
  JEPS12898  Penstemon rydbergii var. oreocharis G. S. Crew and C. S. Robinson 1927-7-1 49 Lassen Bogard R.S. pasture Lassen Forest <sw?>, Bogard R.S. pasture 1712 Comment
  JEPS27628  Penstemon rydbergii var. oreocharis Frances D. Payne 1929-7-12 91 Lassen eastern slope of the southern end of the Warner Range e slope of s end of Warner Range, Upper Silver Creek (Upper Silver Creek) 2286 Comment
  NY650948  Penstemon rydbergii var. oreocharis H. D. D. Ripley 1943-6-13 5706 Lassen 8 miles south of Milford 1859.3 Comment
  POM252930  Penstemon rydbergii var. oreocharis A. A. Heller 1938-6-23 15193 Lassen About 3 miles east of Westwood. Comment
  UC614472  Penstemon rydbergii var. oreocharis L. Constance 1938-6-10 2322 Lassen 1.5 mi ne Robber Creek (near Westwood); ne of Robber Creek, near Westwood 1219 Comment
  CHSC12411  Penstemon speciosus Lynn R. Thomas 1969-6-20 135 Lassen Just above Deans Meadow, ca. 6 mi. s of E. L. B. S. 2011 Comment
  CHSC5916  Penstemon speciosus J. B. Kimsey 1946-6-10 Lassen Eagle Lake. 1554 Comment
  CHSC75549  Penstemon speciosus Vernon H. Oswald; Lowell Ahart 1999-6-9 9747 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at karlo. 1353 Comment
  HSC63768  Penstemon speciosus Teresa Prendusi 1980-7-1 Lassen Champs Flat, 6 mi. W of N tip of Eagle Lake 1768 Comment
  JEPS95972  Penstemon speciosus Vernon H. Oswald and L. Ahart 1999-6-9 9747 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo: T31N R15E SE1/4 Sect. 7, 4440 ft elevation, sagebrush scrub, white volcanic ash substrate 1353 Comment
  RSA121810  Penstemon speciosus L. R. Short, J. Warren 1936-6-26 S- 357 Lassen Burges Spr. Exp. Range. 1845 Comment
  SBBG26872  Penstemon speciosus D. D. Keck 1930-7-23 50 Lassen Susanville 1280 Comment
  UC1583941  Penstemon speciosus G. Schoolcraft 1990-7-2 2100 Lassen sw slopes of Cold Spring Mtn. 1889 Comment
  UC506982  Penstemon speciosus George A. Fischer and Irwin H. Johnson 1933-7-12 F 220 Lassen Lassen National Forest 1706 Comment
  RSA121811  Penstemon speciosus G. A. Fischer, Irwin H. Johnson 1933-7-12 F- 220 Lassen Lassen Forest. 1707 Comment
  SEINET5329894 Image available Penstemon speciosus F. B. Headley 1915-5-28 3 Lassen Honey Lake Comment
  CAS-BOT-BC243410  Penstemon sudans David D. Keck 1930-7-23 953 Lassen Four miles west of Susanville, Sierra Nevada 1463 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
  JEPS84973  Penstemon sudans Barbara Ertter with Gary Schoolcraft 1987-6-16 7178 Lassen below ridge ca 1 mi w Hot Springs VABM (ne side Honey Lake); Skeedaddle Mountains, Honey Lake 1828 Comment
  NY661803  Penstemon sudans N. H. Holmgren 1978-6-12 8937 Lassen Rye Patch Canyon, 4.3 km (2.7 miles) east of U.S. Highway 395, just above Ramhorn Campground, 14.5 km (9 miles) airline distance southeast of Ravendale. 1740 Comment
  NY850108  Peraphyllum ramosissimum R. M. Austin 06 1898 2354 Lassen 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
  CHSC7747  Perideridia bolanderi Beverly J. Wise 1969-5-18 114 Lassen 15.9 mi. East of Susanville on Las. Co. Rd. 216 of Las. Co. Rd. 215. 1554 Comment
  NY1102214  Perideridia bolanderi subsp. bolanderi G. Schoolcraft 1989-5-31 1889 Lassen Skedaddle Ranch Rd. about 6 miles north of Wendel Road 1494 Comment
  POM82581  Perideridia bolanderi subsp. bolanderi Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC1567445  Perideridia bolanderi subsp. bolanderi G. Schoolcraft 1989-5-31 1889 Lassen Skedaddle Ranch Rd. about 6 mi n Wendel Road 1493 Comment
  UCD127832  Perideridia bolanderi subsp. bolanderi R. C. Bechtel 1954-7-12 s.n. Lassen Norvell. Comment
  SEINET12120566  Perideridia gairdneri Unknown 1978-1 3 Lassen Papoose Creek, SE corner of Eagle L 1585 Comment
  CHSC29870  Perideridia oregana Robin L. Ondricek 1978-7-15 103 Lassen .6 mi e of jct. with main road to ELFS on road to Murrers Upper Meadow. 1554 Comment
  UC1390003  Perideridia oregana John Weiler 1963-8-2 63236 Lassen along Hwy 299 between Bieber and Nubieber Comment
  UCD149828  Persicaria amphibia Al Jennings 1963-7-10 s.n. Lassen Lassen County. Honey Lake Refuge. Comment
  CHSC5259  Phacelia adenophora 1944-6-21 Lassen Eagle Lake shore. 1584 Comment
  JEPS1608  Phacelia adenophora Mrs. C. C. Bruce June 1898 2198 Lassen Madeline Plains Comment
  JEPS25529  Phacelia adenophora Rimo Bacigalupi with Lincoln Constance 1959-6-16 7143 Lassen US Hwy 395 1/4 mi s junction of road to Smoke Creek (playa beside road) 1341 Comment
  RSA38635  Phacelia adenophora P. A. Munz 1947-5-19 11881 Lassen Madeline 1677 Comment
  SJSU14070  Phacelia adenophora W. Savage 1964-6-30 337 Lassen by Hwy 89, 11 mi N of Susanville Comment
  JEPS87427  Phacelia glandulifera Vernon H. Oswald and Lowell Ahart 1993-6-14 5541 Lassen Eagle Lake Rd (Lassen A1) at Sandy Beach (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd (Rd 518, 33N89), n side of rd); Eagle Lake 1566 Comment
  UC1537532  Phacelia hastata Gordon H. True 1936-6-27 566 Lassen Hot Spring Mountain 1676 Comment
  JEPS107796  Phacelia hastata subsp. compacta Lowell Ahart, John Dittes 2005-6-2 11950 Lassen Long Valley, along a poor dirt road, about 1 mile northeast of the Anderson Ranch home, about 5 1/2 miles (air) north of the intersection of Scott Road and Highway 70, 6.7 miles (air) northwest of Hallelujah Junction 1498 Comment
  CHSC14192  Phacelia hastata subsp. hastata M. S. Taylor 1974-6-28 274 Lassen Scattered on w shore of Pelican Point in Eagle Lake, ca. 13 mi nw of Susanville. 1524 Comment
  SBBG64963  Phacelia heterophylla E. Rockwell -Jun-1925 404 Lassen Eagle Lake 1554 Comment
  JEPS107814  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
  UC773946  Phacelia heterophylla subsp. virgata L. R. Short 1936-6-30 S- 463 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1816 Comment
  UC773945  Phacelia humilis L. R. Short 1936-5-22 S- 351 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1836 Comment
  RSA112694  Phacelia inundata J. T. Howell 1934-7-8 12510 Lassen Spaldings Resort; Eagle Lake Comment
  UC735052  Phacelia inundata Lincoln Constance 1946-7-3 3097 Lassen Spauldings Eagle Lake (w edge of lake) 1706 Comment
  CHSC5051  Phacelia linearis L. B. Barlow 1967-6-23 3 Lassen Vic. Eagle Lake Biological Station, east central side of Eagle Lake. 1554 Comment
  JEPS29742  Phacelia linearis Rimo Bacigalupi and L. R. Heckard 1962-5-28 8497 Lassen 2.7 mi n of Milford (along U.S. Hwy 395); U.S. Hwy 395 1219 Comment
  UC133088  Phacelia linearis T. S. Brandegee 1892-6-26 Lassen Milford Comment
  UC699732  Phacelia linearis Farris Farris 1936-6-5 Lassen Susanville 1371 Comment
  UCR80208  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 mi. south of Ravendale. 1638 Comment
  POM203782  Phacelia linearis J. T. Howell 1934-6-10 11901 Lassen 3 miles S of Ravendale. Comment
  NY1056433  Phacelia lutea var. glandulifera A. Tiehm 1988-6-2 11701 Lassen South side of Shaffer Mountain, 3.4 road miles north of the Wendel road on highway 395 from Susanville to Alturas, west of the highway 1387 Comment
  NY1056456  Phacelia lutea var. glandulifera L. Constance 1938-6-11 2329 Lassen Throughout the Madeline Plains from Litchfield to Madeline 1219 Comment
  UC107396  Phacelia procera T. S. Brandegee 1892-7-2 Lassen Susanville Comment
  CHSC29886  Phacelia ramosissima var. eremophila Robin L. Ondricek 1978-8-2 109 Lassen In moss covered basalt on top of the ridge se of ELFS. 1609 Comment
  CHSC60749  Phacelia ramosissima var. eremophila Vernon H. Oswald; Lowell Ahart 1993-6-14 5540 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
  NY1058138  Phacelia ramosissima var. eremophila N. H. Holmgren 1980-7-4 9508 Lassen Observation Peak, south side of mountain, 18 km (11 miles) airline distance east of Ravendale 1890 Comment
  SEINET7926036  Phacelia ramosissima var. eremophila Robert L. Johnson, Mikel R. Stevens 2015-7-10 3931 Lassen 0.1 rd mi E of jct with Hwy 395 on Standish Buntingville Rd (A3). Buntingville. Both sides of rd.; 0 1261 Comment
  UC1483880  Phacelia ramosissima var. eremophila G. Schoolcraft 1979-6-26 94 Lassen on dunes located off Marr Road 1706 Comment
  CHSC59552  Phacelia ramosissima var. ramosissima M> Meyer 1980-7-8 514 Lassen Amongst rocks (lg.) and junipers on top of Grasshopper Ridge. 1724 Comment
  RSA40730  Phacelia thermalis C. L. Hitchcock 1940-5-26 6641 Lassen Overflow of Pitt River, 1 mile W of 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
  UC60737  Phleum alpinum M. S. Baker and Frank Nutting 1894-7-9 Lassen Pine Creek Comment
  CHSC4271  Phlox diffusa K. R. Stern 1967-6-25 2430 Lassen On road to Eagle Lake Biological Station, ca. 3 mi. E of Eagle Lake. 1676 Comment
  JEPS71121  Phlox gracilis Dr. R. H. Loughridge 1912-1 Lassen Madeline Plains Comment
  UC773891  Phlox gracilis L. R. Short and Wm. Gansberg 1936-6-2 S- 363 Lassen Burgess Spring Experimental Range Lassen Forest 1859 Comment
  UC773907  Phlox gracilis unknown 1936-5-7 S- 343 Lassen Burgess Spring Experimental Range Lassen Forest 1737 Comment
  UC1924596  Phlox speciosa Debra Valov 2006-5-28 2006006 Lassen Bieber off County Rd A2 c. 8.7 km east of Hwy 299 1305 Comment
  JEPS69990  Phlox speciosa subsp. occidentalis Leland S. Smith 1918-5-12 922 Lassen Hayden Hill, s end of Modoc National Forest Modoc National Forest Comment
  JEPS94127  Phlox stansburyi Vernon H. Oswald and Lowell Ahart 1998-5-22 9114 Lassen ca. 5 mi. n.-n.e. Doyle (rd. to ORV parking area in Fort Sage Mts. 0.6 mi. e. of Fort Sate Rd.); Fort Sage Mts. 1402 Comment
  RSA271915  Phlox stansburyi Christopher Davidson 1975-6-7 2750 Lassen 1 mile E of Beckwourth Pass on Hwy 70. 1524 Comment
  UCD118467  Phlox stansburyi Geo C. Wood 1940-4-18 s.n. Lassen Coffin Ranch near Susanville. Comment
  CHSC60669  Phoenicaulis cheiranthoides Vernon H. Oswald; Anne-Lise Feenstra 1993-4-17 5272 Lassen Near Wayman Barn at the W end of Hunt Rd., Ash Creek Wildlife Area, ca. 5 mi NE of Bieber. 1264 Comment
  UCD116141  Phoenicaulis cheiranthoides F. H. Taylor 1932-5-16 s.n. Lassen Mr. Foster's field in Big Valley. Comment
  JEPS127162  Phoradendron bolleanum Lowell Ahart, John Dittes 2016-7-13 21136 Lassen 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 southern slope of Big Valley. Comment
  SEINET7295530 Image available Phragmites John Thomas Howell 1975-1 51415 Lassen Long Valley Creek bridge on Hwy. 395 southeast of Constantia. 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
  CAS-BOT-BC58236  Phyllodoce breweri Ella Dales Cantelow 1941-9-13 3599 Lassen Mt. Lassen Nat. Park. Comment
  CAS-BOT-BC60738  Physaria occidentalis John Thomas Howell; Gordon H. True; Wayne Dakan 1974-7-30 50655 Lassen Sierra Nevada. Summit ridge of Diamond Mountain. 2346 Comment
  UC1609393  Pilularia americana Vernon H. Oswald and Lowell Ahart 1993-7-8 5648 Lassen near se end Poison Lake (Pittville Rd.(Lassen 111, 36N01) near its intersection with 33N11, 0.4 mi n of Hwy. 44) 1709 Comment
  HSC101734  Pinus albicaulis Michael Kauffmann, Jeffrey Kane 2013-7-23 15 Lassen North-facing caldera 2360 Comment
  RSA719897  Pinus jeffreyi Michael A. Vincent, K. Levings 2006-7-29 12907 Lassen Along Rt. 36, 14.3 miles west of Susanville. Comment
  UCR67404  Pinus jeffreyi George K. Helmkamp 1990-10-4 M 13 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  UC1951062  Plagiobothrys Debra Valov 2007-5-22 2007086 Lassen Bieber, ca. 12 km east of Hwy 299 via County Rd A2. Comment
  UCSB48306  Plagiobothrys canescens Hardham, Clare 1961-6-17 Lassen Baxter Creek S. of Susanville 1676 Comment
  CHSC60332  Plagiobothrys cognatus Mary Ann Showers 1992-6-13 2547 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  JEPS28648  Plagiobothrys cognatus George W. Gillett 1957-7-22 873 Lassen Snag Lake Lassen Volcanic National Park (near inlet at s end of lake) 1850 Comment
  UC526162  Plagiobothrys cognatus John Thomas Howell 1934-6-10 11890 Lassen 15 mi. n. Susanville (on rd. to Horse Lake) 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
  JEPS117204  Plagiobothrys cusickii Lowell Ahart, John Dittes 2010-7-31 17014 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
  SBBG128883  Plagiobothrys cusickii L. Ahart, J. Dittes 2008-6-20 14914 Lassen vernal pool, ca. 100 yards SW of where the levee rd crosses Big Valley Canal, in Big Valley, ca. 4 mi (air) NE of the Headquarters at Ash Crk State Wildlife Area, ca. 7 mi (air) NE of Bieber 1263 Comment
  JEPS121293  Plagiobothrys hispidulus Lowell Ahart 2013-7-22 18854 Lassen 30 yards S of a man-made pond, about 120 yards N of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  UC1137695  Plagiobothrys hispidulus L. R. Short and Wm. Gansberg 1936-6-8 S- 389 Lassen Lassen National Forest 1743 Comment
  UC1609215  Plagiobothrys hispidulus Vernon H. Oswald and Lowell Ahart 1993-6-14 5510 Lassen ca 3 mi (air) w. Eagle Lake (junction of Lassen A1 (Eagle Creek Rd.) with Lassen A21 (32N02)) 1813 Comment
  CAS-BOT-BC224971  Plagiobothrys hispidulus Gary Schoolcraft 1983-8-24 1146 Lassen Big Dry Lake S of Walsh Mountain 1615 Comment
  UC1609123  Plagiobothrys kingii var. harknessii Vernon H. Oswald and Lowell Ahart 1993-6-14 5538 Lassen n side Eagle Lake Road (Lassen A1) at Sandy Beach Road (w shore of lake, ca 2.0 mi ene of Spaulding Tract Rd. (Rd. 518, 33N89)); Eagle Lake 1566 Comment
  CHSC71078  Plagiobothrys leptocladus Vernon H. Oswald; Lowell Ahart 1998-5-22 9099 Lassen Hackstaff Rd. 1.0 mi south of Laver Crossing Rd., 0.2 mi north of Fort Sage Rd., ca. 3 mi north of Doyle. On the bed of a vernal pool. 1316 Comment
  POM73154  Plagiobothrys mollis Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1311 Comment
  RSA128304  Plagiobothrys mollis P. H. Raven, Otto T. Solbrig 1958-6-17 13258 Lassen Along U.S. Hwy 395, 7.1 miles W of Standish. Comment
  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
  RSA0105581  Plagiobothrys mollis var. mollis Lowell Ahart, John Dittes 2013-7-23 18898 Lassen About 50 yards west of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  POM71640  Plagiobothrys scouleri var. hispidulus Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1524 Comment
  CHSC115564  Plagiobothrys stipitatus var. micranthus Lowell Ahart; John Dittes 2015-7-13 20319 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
  UCD124605  Plantago lanceolata P. B. Schultz 1967-7-11 70 Lassen 1 mile south of Milford on U.S. Highway 395. 1325 Comment
  SEINET10972033  Plectritis congesta Mary Susan Taylor 1974-5-4 Taylor 222 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  UC1951081  Plectritis congesta subsp. brachystemon Debra Valov 2009-4-24 2009010 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  RSA337278  Plectritis macrocera Noel Holmgren, Patricia K. Holmgren 1980-7-3 9488 Lassen Rye Patch Canyon Road, 3.4 km (2.1 mi) east of US Hwy 395, 14.5 km (9 mi) airline distance southeast of Ravendale. 1700 Comment
  UC100821  Plectritis macrocera unknown 1890-1 Lassen Milford Comment
  SEINET10550970  Plectritis macrocera Billy Joe Cox, David B. Dunn 1971-6-2 Cox 3116 Lassen 6 miles n of hallelujah jct on us hwy 395, in artemisia tridentata, pinyon Pine, jeffery pine along high ridge and in sandy wash. 1402 Comment
  UCD143647  Poa George A. Fischer; Irwin H. Johnson 1933-7-14 F 245 Lassen Lassen Nat'l Forest; Patterson Flat. 1737 Comment
  CAS-BOT-BC254945  Poa bulbosa Barbara Shervanick 1974-5-9 1298 Lassen Highway 89 through Lassen National Forest, about 0.25 mile N of Bridge Campground 1371 Comment
  SACT001821  Poa bulbosa Herbert Mason 1949-5-29 Lassen Highway 299. In marsh. Comment
  UCD90605  Poa bulbosa Alan A. Beetle; G. L. Stebbins Jr. 1942-5-29 3364 Lassen at Nubieber, near dwellings. Comment
  UCD90699  Poa bulbosa S. Galen Smith; Malcolm A. Nobs, Herbert L. Mason 1949-5-29 758 Lassen on Great Northern Railroad, Highway 299, Nubeiber. Comment
  SEINET10868155  Poa bulbosa David B. Dunn, Billy Joe Cox 1971-6-2 Dunn 17757 Lassen Approx. 12 mi S of Adin on Calif. Hwy 139, in basalt & clay; along edge of road on rolling knol, in Artemisia-Juniper assoc. 1372 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
  UCR119183  Poa cusickii Beecher Crampton 1960-6-18 5708 Lassen Warner Mountains, 6 miles southeast of Jess Valley, 3 miles east of Blue Lake. Southern edge of mountains. 2134 Comment
  UCD91978  Poa pratensis L. Whitney 1933-8-1 s.n. Lassen Slate Creek. 1920 Comment
  UC1132873  Poa pratensis subsp. pratensis Robert W. Gardner 1937-6-18 G- 8 Lassen Burgess Spring Experimental Range; Halls Flat Quadrangle Comment
  UC1142935  Poa pratensis subsp. pratensis A. L. Hormay 1941-6-23 15 Lassen Burgess Spring 1676 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
  RSA300158  Poa secunda J. T. Howell, Gordon H. True, Margaret J. Williams 1973-5-12 s.n. Lassen Elysian Valley northwest of Janesville 1326 Comment
  CAS-BOT-BC247054  Poa secunda subsp. juncifolia Marcus E. Jones 1897-6-19 s.n. Lassen Chat 1615 Comment
  UCD92148  Poa secunda subsp. juncifolia Collector Unknown 1935-6-27 s.n. Lassen Squaw Valley. Comment
  UCD92385  Poa secunda subsp. juncifolia William Martin 1963-7-18 s.n. Lassen 3-4 miles S of Doyle. Long Valley Creek, Rowland Ranch. Comment
  UCD92429  Poa secunda subsp. juncifolia L. D. Whitney 1935-6-28 s.n. Lassen Bieber. Comment
  UC1024839  Poa secunda subsp. secunda Leo Whitney 1935-6-10 3217 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC70684  Poa secunda subsp. secunda J. Burtt Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley Comment
  UC790959  Poa secunda subsp. secunda A. A. Beetle 1941-6-28 2794 Lassen 10 mi w Chester (Rte 36) Comment
  UCD90488  Poa secunda subsp. secunda A. A. Beetle 1941-6-28 2797 Lassen 10 miles W of Chester. 1524 Comment
  UC1024823  Poa wheeleri Leo Whitney 1935-6-13 3241 Lassen Camp 10 Fruit Grower's Supply Company; Lassen Nat'l Forest Comment
  UC1609361  Pogogyne floribunda Vernon H. Oswald and Lowell Ahart 1993-7-8 5669 Lassen ca. 5.4 mi. (air) n.w. Poison Lake (Halls Flat Rd. (33N18), 1.4 mi. s.-s.w. of Pittville Rd. (Lassen 111, 36N01), w. side of rd.) 1694 Comment
  JEPS112858  Polemonium micranthum Dean Wm. Taylor, Glenn L. Clifton 1992-5-7 12548 B Lassen Eagle Lake Region, Pine Creek, on Forest Road 33N07 ca. 0.8 mile S of Byrgess Flat, 1767 Comment
  CAS-BOT-BC74171  Polyctenium fremontii Gary Schoolcraft 1984-7-9 1287 Lassen On s. south of Fillman Road 3.8 miles west of Highway 395. 1609 Comment
  NY182334  Polyctenium fremontii G. Schoolcraft 1981-4-21 576 Lassen SW corner of Madeline Plains 1615.4 Comment
  CHSC5240  Polyctenium fremontii var. fremontii W. Vinyard 1946-6-20 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  SEINET3035191 Image available Polygala lasseniana A. A. Heller 1938-6-23 15213 Lassen South of Secret Valley. Comment
  JEPS28709  Polygonum George W. Gillett 1957-7-29 939 Lassen near w end of Widow Lake, Lassen Volcanic National Park Widow Lake; Lassen Volcanic National Park, Widow Lake 2072 Comment
  NY404577  Polygonum amphibium G. H. True Jr. 1936-6-22 514 Lassen Honey Lake Valley 1219.2 Comment
  UC1536797  Polygonum amphibium var. emersum Gordon H. True Jr. 1939-7-6 1038 Lassen George Bailey Ranch Honey Lake Valley Comment
  CAS-BOT-BC419767  Polygonum argyrocoleon John Thomas Howell 1976-7-20 52030 Lassen About 5 miles west of Fredonyer Pass near confluence of Susan River and Willard Creek 1432 Comment
  JEPS120904  Polygonum aviculare subsp. depressum Lowell Ahart, John Dittes, Todd Sloat 2013-6-8 18735 Lassen About 30 yards N of the 4 tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  JEPS81643  Polygonum aviculare subsp. neglectum M. S. Taylor 1982-8-19 5021 Lassen e side of Hwy 395 ca 4 mi n jct with Hwy 70 at Hallalujah Junction; Beckwourth Pass quad. 1493 Comment
  POM104627  Polygonum bistortoides Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  UC1136194  Polygonum bistortoides Robert W. Gardner 1937-6-20 G- 20 Lassen Burgess Spring Halls Flat Quadrangle Comment
  CHSC60384  Polygonum douglasii subsp. douglasii Mary Ann Showers 1992-6-12 2528 Lassen Lassen Volcanic National Park. Meadow enclosed by lava flow, Butte Lake. 1859 Comment
  CHSC105243  Polygonum douglasii subsp. spergulariiforme Lowell Ahart; John Dittes 2010-7-31 16979 Lassen About 100 yards northeast of where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1520 Comment
  UC1178952  Polygonum douglasii subsp. spergulariiforme Herbert L. Mason Jul 29 1955-Jul 31 1955 14645 Lassen near Westwood Junction ((railroad station 15 mi w of Susanville), s Lassen Co.) Comment
  UCD169308  Polygonum douglasii subsp. spergulariiforme Lowell Ahart 2003-8-17 10515 Lassen About 8 miles (air) southwest of Susanville, about 1/4 mile southwest of the Susan River, on the east side of Highway 36, on the west side of a paved road. 1433 Comment
  UC1603210  Polygonum polygaloides J. Guardino 1993-6-8 256 Lassen near Wayman Barn (at the w end of Hunt Road, Ash Creek Wildlife Area); Ash Creek Wildlife Area, Hunt Road 1264 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
  CHSC112396  Polygonum polygaloides subsp. confertiflorum Lowell Ahart; John Dittes, Todd Sloat 2013-6-8 18732 Lassen Drainage filled with dirt form construction of a pond, about 30 yards north of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  UC1594529  Polygonum polygaloides subsp. confertiflorum Vernon H. Oswald and Lowell Ahart 1992-7-16 5104 a Lassen on s side of Hwy 44 1.2 mi se County Rd. A21 (between Old Station and Susanville); Long Lake 1745 Comment
  CHSC99128  Polygonum polygaloides subsp. kelloggii Lowell Ahart; John Dittes 2008-6-19 14897 Lassen Open hillside, about 100 yards east of Willow Creek, about 120 yards northeast of Highway 139, near Forest Road 36N02, about 19.6 miles east-southeast of Bieber. 1578 Comment
  UC1609434  Polygonum polygaloides subsp. kelloggii Vernon H. Oswald and Lowell Ahart 1993-8-3 5749 Lassen e Silver Lake (just e of Caribou Wilderness, ca 13 air mi n of Lake Almanor, e side of swamp); Cooper Swamp 1932 Comment
  UC773924  Polygonum sawatchense subsp. oblivium L. R. Short 1936-5-22 S- 352 Lassen Burgess Spring Experiment Range Lassen <National> Forest 1836 Comment
  UC465764  Polygonum shastense Franklin P. Nutting Lassen Silver Lake Comment
  SBBG119830  Polygonum spergulariiforme L. Ahart 2003-8-17 10515 Lassen E side of Hwy 36, ca. 0.25 air mi SW of the Susan River, ca. 8 air mi SW of Susanville 1433 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
  CHSC93665  Polypogon monspeliensis Lowell Ahart; John Dittes 2005-6-2 11967 Lassen Stream edge, Long Valley, about 4 1/2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  JEPS120125  Polypogon monspeliensis Lowell Ahart, John Dittes 2012-7-9 18300 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. Comment
  SEINET10661618  Polypogon monspeliensis Lowell Ahart, John Dittes 2005-6-2 Ahart 11967 Lassen T23N, R17E, southwest 1/4 Section 10. Long Valley, about 4 1.2 miles (air) northeast of the intersection of Scott Road and Highway 70, 5.7 miles (air) northwest of Hallelujah Junction. 1408 Comment
  UCR7792  Polypogon monspeliensis Marilyn Malin 1968-7-11 259 Lassen West side of Hwy 395 on west side of Honey Lake 1280 Comment
  CHSC13799  Populus tremuloides Cathy Crittenden 1970-7-9 41 Lassen Antelope lookout. 2316 Comment
  CHSC29937  Porterella carnosula Robin L. Ondricek 1978-6-22 68 Lassen A the NE edge of Mahogany Lake. 2057 Comment
  JEPS19802  Porterella carnosula Rimo Bacigalupi with S. Galen Smith 1957-6-29 6023 Lassen along U.S. Highway 395, 3.1 mi s Madeline (Madeline Plains); Madeline Plains 1615 Comment
  SEINET10460828  Porterella carnosula Noel H. Holmgren, Patricia K. Holmgren 1980-7-3 Holmgren 9463 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi.) south of Madeline. T36N R13ES9 1620 Comment
  SEINET10460829  Porterella carnosula Howell 1934-7-7 Howell 12466 Lassen Near Feather Lake Comment
  SEINET10460831  Porterella carnosula Gillett 1957-7-29 GILLETT 938 Lassen Marsh area near west end of lake, on drying mud flats 2073 Comment
  SEINET10460835  Porterella carnosula Rimo Bacigalupi 1957-6-28 Bacigalupi 6023 Lassen In rich black wet soil in ditch along road, Highway 395 in Madeline Plains 3.1 miles south of Madeline 1615 Comment
  SEINET12329667  Porterella carnosula N. H. Holmgren, Holmgren, P. K. 1980-1 9463 Lassen Madeline Plains, along U.S. Highway 395, 5.6 km (3.5 mi.) S of Madeline, T36N, R13E, S9 1620 Comment
  CHSC4839  Potamogeton R. Carter 1967-7-13 595 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  CHSC4850  Potamogeton R. Carter 1967-7-13 594 Lassen Ca. 5 mi e of Eagle Lake Biology Station at point where rd comes nearest to Willow Creek. 1560 Comment
  CAS-BOT-BC452094  Potamogeton amplifolius Verne Grant; Irving Schneider 1947-8-24 8269 Lassen Northwest shore of Blue Lake, Northern Lassen County. Comment
  UCD150403  Potamogeton crispus William Anderson 1963-7-9 s.n. Lassen Honey Lake Refuge. Comment
  CHSC117537  Potamogeton diversifolius Lowell Ahart; John Dittes 2017-7-13 21149 Lassen Southwest part of pond, 150 yares 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
  JEPS109625  Potamogeton diversifolius Dean W. Taylor 2002-6-21 18177 Lassen stock pond ca. 1 mile SW of McCleland Reservoir 1584 Comment
  CHSC100538  Potamogeton foliosus Daniel B. Marcum 2007-7-25 Lassen 6 miles south of Bieber in Big Valley. Robin Harbert's wild rice field. 1280 Comment
  SEINET4689828  Potamogeton foliosus var. foliosus B. L. Wilson, D. Lytjen 2005-7-28 11482 Lassen Deep creek near confluence with a smaller stream 1359 Comment
  CHSC66284  Potamogeton gramineus Vernon H. Oswald; Lowell Ahart 1996-6-24 7876 Lassen Modoc Plateau. Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake. In Papoose Creek where it leaves the N end of the meadow. 1633 Comment
  OBI77555  Potamogeton natans Anthony Baniaga 2011-7-23 458 Lassen Lassen Natl Forest. Poison Lake. Poison Lake quad. T32N R7E sec 4 1700 Comment
  POM118979  Potamogeton natans Marcus E. Jones 1897-6-21 s.n. Lassen Chat. 1616 Comment
  JEPS103226  Potamogeton nodosus G. Schoolcraft 1996-9-11 2563 Lassen Willow Creek below petroglyphs above dam 1341 Comment
  UC1099819  Potamogeton pectinatus Malcolm A. Nobs, S. Galen Smith 1949-8-20 1491 Lassen 1 mi s Doyle; Long Creek Comment
  RSA233761  Potamogeton richardsonii Robert F. Thorne, C. W. Tilforth 1969-9-5 39140 Lassen Said Valley Reservoir. Comment
  UC60849  Potamogeton striatus J. B. Davy Jun 17 1897-Jun 24 1897 Lassen Honey Lake Valley, Amedee Comment
  JEPS97316  Potamogeton zosteriformis Vernon H. Oswald 1995-8-26 7220 Lassen T38N R15E Sec. 20, 6100 ft, Warner Mtns., Fresh-water Lake in Yellow Pine Forest. Blue Lake located ca. 13 mi SE of Likely 1859 Comment
  POM118839  Potamogeton zosteriformis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CAS-BOT-BC143401  Potentilla John Thomas Howell 1976-7-20 52022 Lassen Along Willard Creek near its confluence with Susan River, about 5 miles west of Fredonyer Pass 1432 Comment
  POM312882  Potentilla biennis Verne Grant 1947-7-30 8189 Lassen South point of west embayment, Tule Lake. Comment
  SDSU9114  Potentilla biennis D. F. Howe 1964-7-31 3901 Lassen Parsnip Creek, Warner Mtns, Modoc National Forest. 1829 Comment
  UC1776675  Potentilla breweri G. Schoolcraft 1994-8-1 2390 Lassen About 2 miles W of Boot Lake 2456 Comment
  CHSC60395  Potentilla flabellifolia Mary Ann Showers 1992-6-13 2553 Lassen Lassen Volcanic National Park. Shoreline at western end of Widow Lake. 2072 Comment
  CHSC89722  Potentilla glandulosa subsp. glandulosa L. P. Janeway 2004-6-26 8154 Lassen High Cascade Range. About 1.3 km west-southwest of Patterson Flat, at junction of Roads 35N08 and 34N20, in Blacks Mountain Experimental Forest. 1750 Comment
  UCR7838  Potentilla gracilis Marilyn Malin 1968-6-27 253 Lassen Lassen National Forest. Papoose Valley Meadow [Papoose Meadows, along Papoose Creek south of Eagle Lake, 2 mi south of Gallatin Beach.] 1620 Comment
  CHSC13850  Potentilla gracilis var. fastigiata F. T. Griggs 1973-7-7 106 Lassen Lassen county Cone Spring. Comment
  CHSC6256  Potentilla gracilis var. fastigiata V. Holt 1946-6-30 Lassen Eagle Lake. Grasshopper Valley. 1624 Comment
  RSA0035409  Potentilla gracilis var. fastigiata Lowell Ahart, John Dittes 2008-6-20 14954 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
  CAS-BOT-BC540361  Potentilla gracilis var. fastigiata John Thomas Howell; Gordon H. True; Margaret Williams 1973-6-28 49453 Lassen Elysian Valley, west of Janesville 1325 Comment
  JEPS121267  Potentilla gracilis var. flabelliformis Lowell Ahart, John Dittes 2013-7-23 18899 Lassen Along a small drainage, W of the road levee, about 100 yards W of the four tall poles, Ash Creek State Wildlife Area, about 5.5 air miles NE of Bieber, Big Valley. Comment
  CHSC5003  Potentilla millefolia K. C. Newman 1967-7-14 87 Lassen Collected in meadow along SH 44 about 15 mi. from the junction of SH 36 going toward Redding. 1828 Comment
  HSC25729  Potentilla millefolia D. H. Norris, S. Dowty, T. Nelson 1971-6-22 19183 Lassen Harvey Valley near Cone Springs Comment
  UC1128270  Potentilla millefolia Robert W. Gardner 1937-6-18 G- 9 Lassen Burgess Spring Halls Flat Quad., Burgess Spring Comment
  UC1128271  Potentilla millefolia A. Simontacchi 1940-5-17 743 Lassen 5.9 mi s Patterson Mtn.; Lassen National Forest, Halls Flat Quad. 1706 Comment
  CHSC66731  Potentilla rivalis Vernon H. Oswald; Lowell Ahart 1996-8-1 8103 Lassen Mountain Meadows Reservoir SW of Westwood. In forest bordering the lake NE of Indian Ole Dam. 1539 Comment
  CHSC117197  Poterium sanguisorba Lowell Ahart; John Dittes 2016-6-7 20998 Lassen On the east side of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CAS-BOT-BC159776  Prunus andersonii Ella Dales Cantelow 1938-10-23 2192 Lassen N. of Doyle, Honey Lake in view Comment
  CAS-BOT-BC159779  Prunus andersonii James Moffitt 1934-6-27 147 Lassen Near Milford Comment
  CAS-BOT-BC159780  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
  CDA26124  Prunus andersonii S. E. Piper 1943-7-14 Lassen Southwest, south and east edges of Honey Lake Desert. 1 mile east of Herlong. 0 Comment
  RSA0028244  Prunus andersonii John F. Emmel 1994-7-18 1335 Lassen Long Valley; between Hwy. 395 and railroad tracks at south edge of Doyle. 1305 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
  CHSC64853  Prunus virginiana var. demissa Vernon H. Oswald 1995-6-26 6931 Lassen Modoc Plateau. Ash Valley Rd. (Lassen 527), 9.9 mi w of Madeline, ca. 0.5 mi w of the reservoir at Fleming Sheep Camp and along the stream coming from the same. 1609 Comment
  CHSC7721  Prunus virginiana var. demissa Beverley J. Wise 1969-5-18 192 Lassen 18.2 mi. East of Susanville on Las. Co. Rd. 216 off Las. Co. Rd. 215. On canyon wall. 1554 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
  UCD91491  Pseudoroegneria spicata A. A. Beetle 1944-8-16 3018 Lassen On east side of Horse Lake. Comment
  POM112808  Pseudoroegneria spicata subsp. spicata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CHSC68858  Pseudostellaria jamesiana Vernon Oswald; Lowell Ahart 1997-6-24 8619 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
  JEPS48629  Pseudostellaria jamesiana Hilda W. Grinnell 1934-6-1 Lassen top of divide 8 mi sw Susanville 1950 Comment
  JEPS51149  Pseudostellaria jamesiana Brown and Wieslander 1922-7-28 51 Lassen Martin Sprs. Eagle Lake; , Martin Sprs Comment
  SEINET5345383  Pseudotsuga menziesii var. menziesii D. A. Charlet 1996-7-8 2286 Lassen Diamond Mountains, Sierra NV, Great Basin drainage (Honey Lake); East Canyon (Milford Grade); at Laufman Campground 1620 Comment
  CAS-BOT-BC361752  Psilocarphus brevissimus var. brevissimus Clarence R. Quick 1962-6-17 62 25 B Lassen Swains Hole, a man-made pond in sagebrush south of Blacks Mountain Experimental Station 1554 Comment
  JEPS124656 Image available Psilocarphus brevissimus var. brevissimus Laurel Loeblich 1964-7-1 66 Lassen Collected 17.6 mi. north of Susanville on highway 139 in ditch on west side of road about 2 meters from road. Comment
  CHSC60879  Psilocarphus oregonus Vernon H. Oswald; Lowell Ahart 1993-7-8 5672 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
  NY702519  Psoralidium lanceolatum J. T. Howell 1934-6-10 11860 Lassen Doyle Comment
  CAS-BOT-BC453500  Pterospora andromedea John Thomas Howell; Gordon H. True 1973-7-31 50024 Lassen Sierra Nevada, on road from Janesville to Thompso Peak, Diamond Range 1737 Comment
  CDA42960  Puccinellia lemmonii L. Ahart, John Dittes, Todd Sloat 2013-6-9 18788 Lassen On the south side of the road, on the south side of McArthur Diversion Canal, 0.32 mile east of Tule River, 2.8 air-miles northwest of McArthur, Fall River Valley, McArthur Swamp. Comment
  CHSC109221  Purshia tridentata B. Castro; L. P. Janeway 2003-10-5 1460 Lassen High Cascade Range. Caribou Wilderness Area; ca 3 mi SW of Bogard Buttes and 1 mi E of Black Butte, along trail betweenCone Lake and Triange Lade, ca 0.8 mi S of Cone Lake and end of USFS Rd 32N09A. 2103 Comment
  NY848524  Purshia tridentata D. B. Dunn 1971-6-2 17784 Lassen 6 miles north of Hallelujah junction on U.S. Hwy 395 1402 Comment
  SEINET7463175  Purshia tridentata F. B. Headley 1905-5-28 s.n. Lassen Honey Lake. 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
  POM90536  Purshia tridentata var. tridentata Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC462755  Pyrola dentata Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mt., Susanville. Perkin's Ranch 2133 Comment
  CAS-BOT-BC462758  Pyrola dentata Louella Bass 1973-6-23 EU- 130 Lassen Elysian Valley 1325 Comment
  CAS-BOT-BC362265  Pyrrocoma carthamoides var. cusickii John Thomas Howell 1934-7-6 12453 Lassen Harvey Valley Comment
  UC1136850  Pyrrocoma hirta var. lanulosa George A. Fischer and Irwin H. Johnson 1933-7-14 F. 242 Lassen Patterson R.S. Lassen National Forest, Patterson R.S. 1737 Comment
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Feb 24 2013
  UC1136851  Pyrrocoma hirta var. lanulosa L. R. Short and J. Warren 1936-8-17 S- 496 Lassen Burgess Spr. Exp. Range 1783 Comment
  UC35843  Pyrrocoma hirta var. lanulosa M. S. Baker and F. Nutting 1894-7-21 Lassen Eagle Lake 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
  CAS-BOT-BC362321  Pyrrocoma racemosa var. paniculata H. M. Hall 1925-8-31 12214 Lassen Amedee, Honey Lake Valley Comment
  CHSC72218  Pyrrocoma racemosa var. paniculata Vernon H. Oswald 1998-9-14 9625 Lassen Windy Hollow on the west side of Hwy. 44 ca. 1 mi northwest of its intersection with A21 (to Westwood). 1737 Comment
  RSA88088  Pyrrocoma racemosa var. paniculata J. T. Howell 1951-8-20 28227 Lassen Honey Lake Valley near Herlong 1280 Comment
  UCR67040  Quercus kelloggii George K. Helmkamp 1990-10-4 M- 8 Lassen Eastern Sierra Nevada Mountains, Plumas National Forest, south of Susanville, north of Milford Pass 1463 Comment
  CHSC71322  Ranunculus alismifolius var. davisii Vernon H. Oswald 1998-6-22 9230 Lassen Champs Flat Rd. (A-21) 1.8 mi north of Hwy. 44, ca. 18 air mi north of Westwood. 1749 Comment
  CDA24294  Ranunculus aquatilis Gordon Leppig 1998-7-13 969 Lassen Modoc National Forest. Blue Lake Ranch. Comment
  HSC95453  Ranunculus aquatilis Gordon Leppig, Tony LaBanca 1997-6-29 539 Lassen Modoc National Forest, Blue Lake Ranch 1970 Comment
  CHSC36348  Ranunculus aquatilis var. capillaceus M. S. Taylor 1982-6-12 4647 Lassen In pond s side of Hwy 36, n side of West Fork Susan River, at jct with Willow Creek Rd, ca. 8 mi w of Susanville. 1463 Comment
  UC1537334  Ranunculus aquatilis var. capillaceus Gordon H. True Jr. 1936-6-21 515 Lassen Honey Lake Valley; in deeper sloughs 1219 Comment
  CHSC13592  Ranunculus cymbalaria D. L. Stites 1967-6-24 36 Lassen Collected ca. 3 1/2 mi. se ELBS, Upper Murrer Meadow. 1524 Comment
  CHSC4872  Ranunculus cymbalaria R. Carter 1967-6-23 548 Lassen In meadow, upper Murrer's Meadow. Comment
  UC1025100  Ranunculus flammula Leo Whitney 1934-8-5 1800 Lassen 16 mi nw Westwood; Lassen National Forest, Caribou Lake 2194 Comment
  CHSC55400  Ranunculus glaberrimus Charlie Crannell 1991-4-21 16 Lassen South end of Lassen County youth camp property bordering Eagle Lake Field Station; 200 ft from Eagle Lake. 1560 Comment
  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
  UC1776660  Ranunculus glaberrimus var. ellipticus G. Schoolcraft 1995-4-2 2464 Lassen East end of Elysian Valley W. of Janesville 1310 Comment
  UC1776661  Ranunculus glaberrimus var. ellipticus G. Schoolcraft 1995-3-1 2463 Lassen East end of Elysian Valley W. of Janesville 1310 Comment
  UC1951076  Ranunculus glaberrimus var. glaberrimus Debra Valov 2009-4-25 2009015 Lassen Bieber; property on south side of County A2 c. 5.4 mi east of Hwy 299 Comment
  UC1126217  Ranunculus occidentalis A. Simontacchi 1940-5-14 707 Lassen 6.1 mi sse Ladder Butte; Lassen National Forest, Halls Flat Quadrangle 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
  JEPS107460  Ranunculus occidentalis var. occidentalis Lowell Ahart, John Dittes 2005-6-1 11857 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
  CDA24358  Ranunculus testiculatus Robin Breckenridge 2007-5-1 PDR# 1349824 C Lassen Wendel. 0 Comment
  CDA3492  Ranunculus testiculatus T. C. Fuller 1969-5-22 18480 Lassen County fairgrounds, Susanville. 0 Comment
  CHSC44887  Ratibida columnifera Lowell Ahart; John Thomas Howell 1974-7-9 513 Lassen Near the south-west side of Eagle Lake. 1584 Comment
  RSA747549  Rhamnus rubra K. M. Meyer, A. Townesmith 2007-7-23 156 Lassen Lassen National Forest. 5.6 miles SW on 32N10 off Hwy 44. (Turn at rest area). 1980 Comment
  UC1523733  Rhamnus rubra Gary Schoolcraft 1981-7-21 544 Lassen ne of Pittville (along Hwy 299) 1249 Comment
  JEPS127350  Rhaponticum repens Lowell Ahart, John Dittes 2016-7-13 21103 Lassen 200 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. Comment
  CHSC13607  Ribes Lynn R Thomas 1969-4-17 93 Lassen 100 yds up slope w of back of Lassen Memorial Hospital, Susanville. Boundary between T29N and T30N. 1310 Comment
  SEINET10871347  Ribes Mary Susan Taylor 1974-5-4 Taylor 223 Lassen Between Eagle Lake Field Station and the marsh area ca. 1/4 mi N of the station, E side of Eagle Lake, N of Susanville. Comment
  CHSC7759  Ribes aureum Beverley J. Wise 1969-5-4 101 Lassen 0.5 mi. south on Las. Co. Rd. 305 off junction of Hwy 395. 1249 Comment
  JEPS114691  Ribes aureum var. aureum Lowell Ahart, John Dittes 2008-6-20 14950 Lassen About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber 1263 Comment
  RSA0115086  Ribes aureum var. aureum Lowell A. Ahart, John Dittes 2008-6-20 14950 Lassen About 300 yards southwest of where the levee road crosses Big Valley Canal, in Big Valley, about 4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 7 miles (air) northeast of Bieber. 1263 Comment
  CHSC68749  Ribes cereum var. cereum Vernon H. Oswald; Lowell Ahart 1997-5-27 8515 Lassen Williams Reservoir on Forest Route 38N04 (between Hwy. 139 near Willow Creek Guard Station and Coyote Flat), 2.6 mi northeast of Hwy. 139. 1682 Comment
  CAS-BOT-BC169008  Ribes hudsonianum L. S. Smith 1918-8-13 1033 Lassen Lost Lake, Silver Creek, Modoc National Forest 2286 Comment
  CHSC7761  Ribes roezlii Beverly J. Wise 1969-5-17 99 Lassen 16.5 mi. N. W. of Susanville on the west side of Gallatin Creek, 1/4 mi. south of Eagle Lake. 1554 Comment
  JEPS28697  Ribes roezlii George W. Gillett 1957-7-26 917 Lassen e shore Butte Lake; Lassen Volcanic National Park 1844 Comment
  RSA0024767  Ribes roezlii James Henrickson 1969-9-4 4267 Lassen 4 miles S of Westwood along Highway 147. 1390 Comment
  SEINET10838520  Ribes roezlii Mary Susan Taylor 1974-1 Taylor 309 Lassen Vicinity of Eagle Lake, ca. 13 mi NW of Susanville. Comment
  CAS-BOT-BC173851  Ribes velutinum A. G. Brenneis 1928-5-29 4 Lassen Lassen National Forest. 1-1/2 mi. SE Willow Springs 1371 Comment
  CHSC12424  Ribes velutinum Anne Linda Brisk 1969-6-19 1 Lassen 1/4 mi NE of ELBS. 1554 Comment
  CHSC42153  Ribes velutinum C. E. Laver 1985-7-20 Lassen Ca. 8 mi se of hayden Hill and 1 mi nw of Said Valley Reservoir. 1584 Comment
  UC585163  Ribes velutinum E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1738 Lassen gully on mountain above Red Rock 1420 Comment
  CHSC23568  Ribes viscosissimum W. O. Baum 1971-6-21 32 Lassen E slope on fire trail on Gallatin Peak. 1920 Comment
  CHSC117224  Rigiopappus leptocladus Lowell Ahart; John Dittes 2016-6-7 20976 Lassen 20 yards west of the pond, about 100 yards east of Stonebreaker Road, 0.6 miles south of County Road A-2, 5.3 miles (air) east of Bieber, 7.3 miles (air) southwest of Adin, hills at the southern slope of Big Valley. 1289 Comment
  CHSC66378  Rigiopappus leptocladus Vernon H. Oswald; Lowell Ahart 1996-6-17 7795 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
  UC35867  Rigiopappus leptocladus Milo S. Baker July 1894 Lassen s side Dixie Mts. Comment
  JEPS34911  Rigiopappus leptocladus L. S. Smith 1920-6-15 Lassen McKenzie spring Bieber Range, McKenzie spring 1310 Comment
  OBI48617  Rigiopappus leptocladus Lewis S. Rose 1940-6-11 40507 Lassen 8 mi W of Nubieber 1219 Comment
  SEINET3148575  Rigiopappus leptocladus L. S. Rose 1940-6-11 40507 Lassen 8 mi W of Nubieber 1219 Comment
  CHSC110910  Rorippa curvisiliqua var. orientalis Lowell Ahart; John Dittes 2012-7-9 18292 Lassen About 100 yards southeast of the tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CHSC36490  Rorippa nasturtium-aquaticum Theresa Costa 1982-6-4 36 Lassen Along Willow Creek in Murrers Upper Meadow. Comment
  NY182160  Rorippa sinuata G. Schoolcraft 1989-6-6 1901 Lassen North end of Secret Valley west of Hwy. 395. 1350.3 Comment
  NY182185  Rorippa sinuata G. Schoolcraft 1983-6-28 1025 Lassen 1341.1 Comment
  RSA702446  Rosa californica L. P. Janeway 2004-6-26 8171 Lassen High Cascade Range. Along Road 33N15 (Lassen Trail) between Patterson Flat and Aspen Flat. Black Mountains Experimental Forest. 1790 Comment
  UCR17283  Rosa californica Frank C. Vasek 1975-7-11 750711- 22 Lassen Modoc National Forest, Hayden Hill Road c. 0.75-1.0 mi SW of Calif. Hwy 139 1829 Comment
  UC75495  Rosa woodsii subsp. ultramontana Milo S. Baker 1898-1 Lassen Vicker's Comment
  SEINET10540474  Rosa woodsii subsp. ultramontana Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 890 Lassen Collected 3 mi. N of Milford, CA on Hwy. 395 at Honey Lake campgrounds. Comment
  JEPS47284  Rosa woodsii var. ultramontana W. L. Jepson 1939-8-11 19372 Lassen Milford 1280 Comment
  JEPS88554  Rosa woodsii var. ultramontana Vernon H. Oswald and Lowell Ahart 1996-6-17 7773 Lassen 7 mi w of Susanville (Bizz Johnson Trail accessed at Devils Corral Trailhead located off Highway 36, edge of trail at bridge spanning the Susan River on n side of Hwy 36); Modoc Plateau, Bizz Johnson Trail 1432 Comment
  POM91623  Rubus parviflorus var. bifarius Marcus E. Jones 1897-6-28 s.n. Lassen Diamond Mountain; Susanville; Perkin's Ranch. 1829 Comment
  CHSC7737  Rumex crispus Beverley J. Wise 1969-5-23 80 Lassen 35.5 mi. S.E. of Susanville on Las. Co. Rd. 320. 1249 Comment
  CHSC113066  Rumex fueginus Lowell Ahart; John Dittes 2013-7-22 18849 Lassen West margin of a duck field, about 30 yards south of the four tall poles, Ash Creek State Wildlife Area, about 5.5 miles (air) northeast of Bieber, Big Valley. 1267 Comment
  CDA23167  Rumex hymenosepalus Sterling O. Mattoon 1977-5-3 Lassen Highway 395 at North Access Road to Herlong. 0 Comment
  CAS-BOT-BC433634  Rumex lacustris James Jokerst 1983-7-25 1891 Lassen Near Madeline Plains. 1614 Comment
  UC6963  Rumex maritimus M. S. Baker and Frank Nutting 1894-7-25 Lassen Willow Creek Comment
  CHSC66730  Rumex occidentalis Vernon H. Oswald; Lowell Ahart 1996-8-1 8117 Lassen N shore of the Hamilton Branch of the N. Fork of the Feather River ca. 0.1 mi downstream from Indian Ole Dam on Mountain Meadows Reservoir, SW of Westwood. 1524 Comment
  CAS-BOT-BC109329  Rumex paucifolius G. Schoolcraft 1987-4-29 1689 Lassen Ash Valley RNA. 1554 Comment
  UC1101216  Rumex salicifolius var. lacustris Verne Grant and Irving Schneider 1947-7-30 8188 Lassen s point of w embayment Tule Lake Comment
  CHSC65318  Rumex salicifolius var. salicifolius Vernon H. Oswald; Lowell Ahart 1995-8-14 7188 Lassen Horse Lake Rd. (Lassen 536) at the railroad crossing 1 mi W of Hwy.395, N of Susanville. 1645 Comment
  UC6962  Rumex salicifolius var. salicifolius M. S. Baker and F. Nutting 1894-7-1 Lassen Dixie Mts. Comment
  CHSC58852  Rumex salicifolius var. triangulivalvis Vernon H. Oswald; Lowell Ahart 1992-7-16 5123 Lassen Swamp on Bridge Creek, W of the Cinder Pit on the logging road paralleling the E side of the creek, 1.3 mi N of Hwy. 44 and McCoy Flat Reservoir, between Old Station and Susanville. Common on drier parts of a marshy meadow. 1719 Comment
  JEPS29739  Rumex venosus Rimo Bacigalupi, and L. R. Heckard 1962-5-28 8494 Lassen 10 mi s Milford (along U.S. Hwy 395) 1219 Comment
  UCD101656  Rumex venosus R. N. Raynor 1939-5-31 s.n. Lassen Milford, Honey Lake Valley. Comment
  SEINET4176403  Rumex venosus P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  CHSC4993  Sagittaria cuneata R. Clicquennoi 1967-7-1 21 Lassen At edge of small roadside pool 16 mi n of Susanville on highway 139. 1524 Comment
  CHSC66737  Sagittaria cuneata Vernon H. Oswald; Lowell Ahart 1996-8-1 8107 Lassen Mountain Meadows Reservoir SW of Westwood. On the receding shore of the reservoir NE of Indian Ole Dam. 1539 Comment
  JEPS32201  Sagittaria cuneata Leland S. Smith 1918-7-22 1009 Lassen Blue Lake 1874 Comment
  CAS-BOT-BC445672  Sagittaria cuneata Jean L. Pawek 1964-8-16 604 Lassen Lake Almanor near Chester 1371 Comment
  CHSC58514  Salix boothii Vernon H. Oswald 1992-7-3 5048 Lassen Trail from Juniper L. to Snag L., on the W edge of Cameron Meadow. 1950 Comment
  CHSC91187  Salix exigua Lowell Ahart; John Dittes 2005-6-1 11905 Lassen On the north side of Scott Road, east side of the railroad underpass, Long Valley, about 4 3/4 miles (air) north of the intersection of Scott Road and Highway 70, 6.2 miles (air) northwest of Hallelujah Junction. 1459 Comment
  RSA0035819  Salix exigua Lowell A. Ahart, John Dittes 2008-6-22 15043 Lassen In Big Valley, about 2.4 miles (air) northeast of the Headquarters at Ash Creek State Wildlife Area, about 5.4 miles (air) northeast of Bieber. 1257 Comment
  CAS-BOT-BC107961  Salix geyeriana John Thomas Howell; Gordon H. True; Margaret Williams 1973-5-12 49220 Lassen Elysian Valley northwest of Janesville - Sierra Nevada 1325 Comment
  JEPS107968  Salix jepsonii Lowell Ahart, John Dittes 2005-6-2 11947 Lassen Long Valley, along a small stream, about 1 1/2 miles (air) northeast of the Anderson Ranch home, about 6 miles (air) north of the intersection of Scott Road and Highway 70, 7.5 miles (air) northwest of Hallelujah Junction 1601 Comment
  POM209471  Salix jepsonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 682 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  CAS-BOT-BC106964  Salix lasiolepis G. Schoolcraft 1999-5-7 2820 Lassen Along B.J. Trail near 4 mi. marker w. of Susanville 1371 Comment
  POM209470  Salix lemmonii Carleton R. Ball, Emily Smith, H. P. Bracelin 1932-7-24 685 Lassen Mt. Lassen Hwy. 0.6 mile N of Sulfur Works Checking Station. Lassen Volcanic National Park. 2043 Comment
  UC1609475  Salix lemmonii Vernon H. Oswald and Lowell Ahart 1993-6-3 5489 Lassen n. of Hwy. 44 between Poison Lake and Susanville (Bridge Creek Spring Rd. (Lassen 112, Forest 31N06) at Bridge Creek, s. edge of rd.) 1746 Comment
  SEINET11987291  Salix lutea J. Vale, Wagnon, K.; Knight, W.; Knight, I. 1981-1 4121 Lassen Willow Creek Campground on road between adin and Said Valley Reservoir Comment
  POM107066  Salix melanopsis Marcus E. Jones 1897-6-25 s.n. Lassen Susanville. 1341 Comment
  CAS-BOT-BC126174  Salix scouleriana Hans Leschke 1964-9-3 1891 Lassen Cinder Cone, Lassen Volcanic Nat. Park Comment
  CAS-BOT-BC126176  Salix scouleriana John Thomas Howell 1969-8-7 45885 Lassen Between Butte Lake and Cinder Cone, Lassen Park Comment
  CAS-BOT-BC176903  Salsola tragus Margaret Williams; Steven Williams 1974-7-26 74 -L-7 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  CDA5749  Salvia aethiopis Margaret Bellue Jul 1949 Lassen Susanville. 0 Comment
  JEPS126481  Salvia dorrii Jillian Pastick, Lillie Pennington, Andrea Stuemsky 2015-6-16 CA 350 -038 Lassen Approximately 50 yards off Belfast Road. Take Johnsonville Road E approximately 25 mi then take left on Belfast Road approximately 8 miles. Comment
  UCLA27615  Salvia dorrii var. dorrii Mrs. H. C. Cantelow 1941-5-22 Lassen 2.5 mi n Secret Valley (C.C.C. Camp on U.S. Hwy 395 to Alturas from Quincy) Comment
  CAS-BOT-BC214311  Salvia dorrii var. pilosa Elmer I. Applegate 1897-6-3 860 Lassen Madeline Plains Comment
  JEPS5934  Sambucus racemosa var. microbotrys Frances D. Payne 1929-7-12 80 Lassen Lost Lake Warner Mountains (se extremity of mts.) 2286 Comment
  UC1924239  Sanguisorba annua Debra Valov 2004-6-8 2004245 Lassen Bieber; off County A2 c. 8 km east of Hwy 299 1271 Comment
  CDA19211  Sarcobatus vermiculatus D. Kratville 2001-6-21 s.n. Lassen Modoc Plateau; Outside of Susanville. 0 Comment
  CHSC31116  Sarcobatus vermiculatus J. S. White 1980-4-14 114 Lassen Basin area. 0.1 mi n of US Hwy 395 3.5 mi e of Litchfield. 1341 Comment
  SJSU14475  Sarcobatus vermiculatus W. D. Pitts 1990-5-29 298 Lassen by Hwy 395 between Madeline & Ravendale 1432 Comment
  UCD101770  Sarcobatus vermiculatus Beecher Crampton 1960-6-19 5730 Lassen southeast of Karlo; along U.S. Hwy 395. Comment
  HSC17990  Sarcodes sanguinea M. S. Baker 1890-3 Lassen Honey Lake Valley Comment
  CAS-BOT-BC466321  Sarcodes sanguinea John Thomas Howell 1973-7-10 49786 Lassen Sierra Nevada, Fredonyer Pass 1737 Comment
  JEPS94609  Saxifraga nidifica var. nidifica Vernon H. Oswald and Lowell Ahart 1997-5-27 8499 Lassen on Forest Route 38N04 n Susanville ((between Hwy 139 near Willow Creek Guard Station and Coyote Flat), 0.1 mi e of Hwy 139) 1546 Comment
  CAS-BOT-BC283085  Schedonorus arundinaceus John Thomas Howell; Gordon H. True 1973-8-1 50185 Lassen Gold Run Creek Road south of Susanville, Diamond Range, Sierra Nevada 1584 Comment
  POM111523  Schoenoplectus fluviatilis Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1219 Comment
  CAS-BOT-BC240002  Scribneria bolanderi Alice Eastwood; John Thomas Howell 1940-6-11 7974 Lassen Big Valley Mts. Comment
  CHSC77219  Scutellaria holmgreniorum G. Schoolcraft 1998-7-14 2762 Lassen N. of Shaffer well on E. side of Tablelands. 1371 Comment
  RSA0003996  Scutellaria holmgreniorum Noel Holmgren, Pat Holmgren 1980-7-5 9524 Lassen Upper Smoke Creek drainage, 21.9 km. from U.S. Hwy. 395 via Rye Patch Can. Comment
  JEPS62885  Scutellaria nana L. S. Smith C. 1918 Lassen Bieber Range, nw Lassen County Bieber Range 1371 Comment
  POM80110  Scutellaria nana Marcus E. Jones 1897-6-24 s.n. Lassen 10 to 15 miles west from Amedee. 1220 Comment
  RSA128297  Scutellaria nana Peter H. Raven, Otto T. Solbrig 1958-6-17 13270 Lassen Along U.S. Highway 395, 19.0 miles south of Ravendale. 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
  UC1137689  Scutellaria nana George A. Fischer, Irwin H. Johnson 1933-7-12 F 221 Lassen Lassen National Forest, Lassen Forest and Range Experiment Station Lassen National Forest; , Lassen Forest and Range Experiment S 1722 Comment
  UC1549237  Scutellaria nana Richard Olmstead 1984-6-27 586 Lassen turnoff 14 mi s of Ravendale (12.2 mi e of US 395, Rye Patch Canyon Road); Rye Patch Canyon Road 1566 Comment
  UC25818  Scutellaria nana M. S. Baker and Frank Nutting 1894-7-12 Lassen Pine Creek Comment
  CAS-BOT-BC240082  Secale cereale Margaret Williams; Steven Williams 1974-7-26 74 -L-38 Lassen Near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  NY758141  Sedum lanceolatum J. T. Howell 1974-7-30 50670 Lassen Summit ridge of Diamond Mountain 2286 Comment
  CHSC60822  Senecio hydrophiloides Vernon H. Oswald; Lowell Ahart 1993-6-28 5600 Lassen Rd. 35N04 at Aspen Well, N of Hwy 44 on the NW edge of Harvey Valley, NE of Poison Lake. Meadow. 1725 Comment
  HSC63728  Senecio integerrimus Teresa Prendusi 1980-4-30 Lassen NE of Snowstorm Ranch near Kalo Rd., Ravendale; near railroad tracks 1585 Comment
  SEINET10799222  Senecio integerrimus Paul Gallian, David B. Dunn 1971-6-2 Gallian 504 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
  SEINET10833711  Senecio integerrimus Billy Joe Cox 1971-6-2 Cox 3106 Lassen Approx. 30 mi. N of Susanville, on Calif. Hwy. 139, in basalt. Assoc.: Pinus-Artemisia-Juniper. 1646 Comment
  UC1137289  Senecio integerrimus var. exaltatus K. E. Bradshaw 1939-5-27 239 Lassen Black Mt. Experimental Forest, Plot 39-1 Lassen Forest 1767 Comment
  UC1776693  Senecio integerrimus var. exaltatus G. Schoolcraft 1994-7-7 2368 Lassen About 1 mile west of Boot Lake 219 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
  CDA8680  Senecio serra T. C. Fuller 1959-7-7 4726 Lassen Highway 395 at Secret Creek Bridge, 3.3 miles north of road to Karlo. 0 Comment
  RSA0013303  Senecio serra var. serra Bruce Bartholomew, B. Anderson 1988-7-22 4496 Lassen Mosquito Creek ca. 2 km SW of Patterson Meadow, southern end of the Warner Mountain 2080 Comment
  CHSC76260  Sesuvium verrucosum Lowell Ahart; Vernon H. Oswald 1999-9-13 8217 Lassen Field about 150 yards southwest of the parking area, about 1 mile south of the sign in station, Honey Lake Wildlife area, 5 1/2 miles (air) southeast of Standish. 1207 Comment
  SEINET10788334  Setaria viridis Lowell Ahart 2010-8-31 Ahart 17139 Lassen T39N, R8E, southwest 1/4 section 35. About 1/4 of a plant, on damp good soil, moisture from irrigation, on the east side of Walters Road, 4235 feet south of Modoc County line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. Common. 1277 Comment
  CHSC100133  Shepherdia argentea L. P. Janeway 2008-8-2 9526 Lassen Modoc Plateau. Just above the flats along the south side of Rush Creek; south side of Smokey Creek Tanch Road 1.8 km west of the CA-NV line. 1349 Comment
  CHSC105238  Sidalcea glaucescens Lowell Ahart; John Dittes 2010-7-31 17016 Lassen On the south side of the road, about 50 yards east of the large culvert, where the road crosses Hunsinger Draw, 1.9 miles (air) northwest of Moll Reservoir, 2.8 miles (air) west of Ash Valley, 8.4 miles (air) southeast of Adin. 1516 Comment
  UC1587031  Sidalcea glaucescens G. Schoolcraft 1991-7-30 2198 Lassen East slope of Widow Mountain 1859 Comment
  HSC82190  Sidalcea glaucescens Thomas W. Nelson, Jane Nelson 1980-7-6 6039 Lassen Along Ash Creek at Ash Creek Campground 1494 Comment
  CHSC27642  Sidalcea oregana George Deniso 1978-7-21 88 Lassen Colman L., W shore, SE of Eagle L. 1962 Comment
  POM230480  Sidalcea oregana subsp. oregana D. D. Keck, Jens Clausen 1935-6-24 3740 Lassen 2 miles S. of Ravendale, Comment
  JEPS67272  Sidalcea oregana subsp. spicata Brown and Wieslander 1922-7-18 65 Lassen Martin Sprs , Martin Sprs (Eagle Lake) Comment
  NY746728  Sidalcea oregana var. maxima A. Tiehm 1988-6-2 11704 Lassen East side of Snowshoe [Snowstorm?] Mountain, 18.1 road miles north of the Wendel road on highway 395 from Susanville to Alturas, west side of the highway 1402 Comment
  RSA123272  Silene bernardina L. R. Short, D. Gish 1936-7-15 S- 487 Lassen MDM, Burgess Spr. Exp. Range; Forest: Lassen. 1744 Comment
  UC585109  Silene bernardina E. B. Babcock, G. L. Stebbins Jr. 1936-6-7 1765 Lassen rocky ne slope of ridge near summit e Red Rock; summit e of Red Rock 1828 Comment
  OBI75901  Silene lemmonii Anthony Baniaga 2011-8-1 476 Lassen Lassen Natl Forest. NW Swain Meadow. Swain Mtn qud T30N R8E sec 27 SE of NW 1764 Comment
  CHSC65097  Silene menziesii Vernon H. Oswald; Lowell Ahart 1995-7-24 7137 Lassen High Cascade Range. Along Pine Creek on the upstream side of Forest Road 31N25, at the NW corner of Upper Stephens Mdws., ca. 3 mi NNE of Silver Lake, N of Lake Almanor. At the NE corner of the impoundment on Pine Creek. 1905 Comment
  CAS-BOT-BC389545  Silene nuda M. S. Taylor; B. Hammond 1982-7-8 4790 Lassen Along Scott Rd just s of bend, ca. 4 mi ne of Beckwourth Pass 1432 Comment
  RSA666396  Silene nuda Barbara Ertter 1988-7-25 7867 Lassen ridge of Diamond Mtns, ca. 1.5 mi. E of Diamond Peak, ca. 10 air miles due S of Susanville. 2256 Comment
  UC1137897  Silene nuda E. Sawyer 1935-7-8 274 Lassen 7 3/4 mi ene Loyalton; Sierraville Quad., ene of Loyalton Comment
  CAS-BOT-BC389548  Silene nuda David D. Keck 1944-7-8 5446 Lassen Sierra Nevada. 2 mi. E. of Westwood, meadow leading to Mountain Meadows Reservoir 1524 Comment
  UC465657  Silene occidentalis subsp. occidentalis Franklin P. Nutting Lassen Silver Lake Comment
  HSC4227  Silene verecunda Fred J. Kindel 1955-7-9 Lassen Susan River Comment
  RSA0028051  Sisymbrium altissimum John F. Emmel 1996-7-14 1425 Lassen North base of Ft. Sage Mts., south edge of Honey Lake Valley; gently sloping sandy flats 0.2-0.3 air mile north and 0.15-0.3 air mile east of 4818 ft. peak of Turtle Mtn. 1280 Comment
  CHSC27605  Sisyrinchium bellum Jennifer Estep 1978-7-11 1 Lassen Papoose Creek, SE corner of Eagle L. 1584 Comment
  UC1032501  Sisyrinchium bellum A. Simontacchi 1940-6-15 863 Lassen 2.3 mi ssw of Black Mountain; Lassen National Forest 1798 Comment
  CHSC106203  Solanum physalifolium var. nitidibaccatum Lowell Ahart; John Dittes 2010-8-31 17138 Lassen On the east side of Walters Road, 4235 feet south of Modoc County Line, about 4.3 miles (air) south-southwest of Adin, about 7.0 miles (air) northeast of Bieber, Big Valley. 1276 Comment
  CHSC59159  Sparganium emersum subsp. emersum Vernon H. Oswald; Lowell Ahart 1992-7-16 5119 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. In streamlets on the meadow. 1719 Comment
  JEPS96089  Sparganium emersum subsp. emersum Vernon H. Oswald and Lowell Ahart 1996-6-24 7871 Lassen Papoose Meadows located ca. 0.5 mi E of Eagle Lake Rd. (A1) and 2.5 mi S of Eagle Lake, Modoc Plateau, Montane Meadow 1633 Comment
  UC1537628  Sparganium eurycarpum var. eurycarpum Gordon H. True Jr. 1939-7-6 1024 Lassen Honey Lake Valley; George Bailey Ranch Comment
  UC2042785  Sphaeromeria cana Barbara Ertter with Gary Schoolcraft 1987-6-16 7192 Lassen Skeedaddle Mountains on NE side of Honey Lake, on S side of Hot Springs. Comment
  UC1567385  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1989-5-3 1865 Lassen s Karlo (n end Secret Valley); n end Secret Valley 1341 Comment
  CAS-BOT-BC374759  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 1998-6-29 2319 Lassen Ash Valley along main road crossing Ah [Ash] Crk. 1554 Comment
  UCD136228  Sphaeromeria potentilloides var. potentilloides G. Schoolcraft 2000-6-19 2905 Lassen Flat southeast of Ravendale BLM Fire Station. 1645 Comment
  CHSC41843  Stachys ajugoides var. rigida P. V. Caldwell 1972-7-8 262 Lassen Eagle Lake. 1 mile from the forest road toward Papoose Meadows on Papoose Creek. Comment
  CHSC5277  Stachys ajugoides var. rigida P. Balch 1955-7-17 Lassen Papoose Creek, near Gallatin's. Eagle Lake. 1615 Comment
  UC1483862  Stachys ajugoides var. rigida G. Schoolcraft 1980-8-13 348 Lassen n side Diamond Mtn. 1950 Comment
  UC1567417  Stanleya pinnata G. Schoolcraft 1989-5-31 1880 Lassen near intersection Skedaddle Ranch and Wendel Roads; nr intersection Skedaddle Ranch and Wendel Roads 1249 Comment
  CAS-BOT-BC60991  Stanleya viridiflora Louella Bass 1982-6-20 s.n. Lassen 0.5 mile west of Karlo. Comment
  CHSC75482  Stanleya viridiflora Vernon H. Oswald; Lowell Ahart 1999-6-9 9744 Lassen Northeast of Susanville on County Rd. 216 (to Karlo and Biscar Wildlife Management Area) 5.2 mi west of Hwy. 395, 0.2 mi east of the RR crossing at Karlo. 1353 Comment
  UCD115760  Stanleya viridiflora Louella Bass 1982-7-25 10 -82 Lassen near Karlo, about 12 miles north of Litchfield. 1356 Comment
  SJSU8510  Stellaria longipes subsp. longipes J. W. Tilden 1960-6-27 1516 Lassen by Moonlight Rd c. 5 mi E of Westwood 1524 Comment
  CHSC5230  Stellaria longipes var. longipes P. Balch 1955-7-20 Lassen Eagle Lake. Roadside meadow 3 1/2 mi from Antelope lookout. 1676 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
  SEINET10537644  Stellaria longipes var. longipes Mary Merello 1993-6-28 Merello 756 Lassen Lassen National Forest. At end of Forest Service Road 31N01 at lake. Pine woodland. 1740 Comment
  POM42274  Stenotus acaulis Marcus E. Jones 1897-6-28 s.n. Lassen Top of Diamond Mt. Susanville. Perkin's Ranch. 2226 Comment
  UC86569  Stenotus acaulis T. S. Brandegee 1892-7-2 Lassen Near Susanville 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
  RSA252459  Stephanomeria exigua subsp. coronaria R. F. Thorne, C. W. Tilforth 1969-9-6 39261 Lassen C. 0.7 mi. SE of Milford, along Hwy. 395 (W. of Honey Lake). 1280 Comment
  CAS-BOT-BC375595  Stephanomeria lactucina Margaret Williams; Steven Williams 1974-7-26 74 -L-12 Lassen Area near Hallelujah Junction, west of Hwy 395 and south of Hwy 70 1493 Comment
  UC1587037  Stephanomeria lactucina G. Schoolcraft 1991-7-30 2200 Lassen e slope Widow Mountain 1859 Comment
  CHSC23485  Stephanomeria tenuifolia Wayne O. Baum 1971-7-14 71 -62 Lassen NE. slope of Gallatin Peak. 2072 Comment
  CHSC23504  Stephanomeria tenuifolia Wayne O. Baum 1971-7-19 71 -76 Lassen E. slope of Gallatin Peak. 2072 Comment
  CHSC66853  Stephanomeria virgata subsp. pleurocarpa Vernon H. Oswald 1996-10-3 8296 Lassen Modoc Plateau. Hwy. 395 N of Susanville between Litchfield and Ravendale, 13.4 mi N of Smoke Creek Ranch Rd. Roadside. 1524 Comment
  UC2062575  Stephanomeria virgata subsp. pleurocarpa Belinda Lo with Alex Randolph-Lowe 2017-10-9 390 Lassen LASSEN COUNTY: Bureau of Land Management, north of Red Rock Road. Comment
  SEINET10524630  Stipa comata var. comata Douglas G. LeDoux, David B. Dunn 1973-5-25 LeDoux 884 Lassen Coll 3 mi N of Milford, on Hwy 395 at Honey Lake campgrounds. Comment
  SEINET8061783  Stipa comata var. comata P. B. Kennedy 1901-6-10 s.n. Lassen R.R. Station, Constantia Comment
  HSC22318  Stipa nelsonii subsp. dorei D. E. Anderson 1969-7-5 4992 Lassen Freedonyer Pass, 15 mi. W of Susanville 1752 Comment
  SEINET10443621  Stipa thurberiana M. Church 2016-6-21 5 Lassen Between Hwy 395 and Petersen Mountain, N of Hallelujah Junction. 1507 Comment
  UCR183194  Stipa thurberiana Jim Andre, G. L. Clifton 1993-5-28 7715 Lassen Along Hwy 395 c. 25 mi. NE of Susanville at Viewland exit, NE of Shaffer Mtn 1349 Comment
  OBI22293  Stipa webberi Robert F. Hoover 1940-9-29 4647 Lassen Pass between Shaffer Mt and Warren Peak Comment
  UCD138352  Stuckenia pectinata Verne Grant; Irving Schneider 1947-8-1 8244 Lassen East end of Tule Lake. Comment
  POM102724  Suaeda moquinii Marcus E. Jones 1897-6-23 s.n. Lassen Amedee. 1220 Comment
  JEPS120473  Suaeda nigra L. P. Janeway, B. Castro 2012-7-2 10925 Lassen Modoc Plateau. Honey Lake Valley, northeast side of Honey Lake, 0.6 km west of Wendel Road, 4.8 air km southeast of Wendel. Comment
  UC1123453  Swertia albicaulis var. albicaulis Robert W. Gardner 1937-6-16 G- 13 Lassen Burgess Spring Experimental Range Halls Flat Quad. 1798 Comment
  UC1609461  Swertia albicaulis var. albicaulis Vernon H. Oswald and Lowell Ahart 1993-6-28 5605 Lassen ne of Poison Lake (at Aspen Well, n of Hwy 44, on the nw edge of Harvey Valley) 1725 Comment
  UC585195 Image available Swertia albicaulis var. albicaulis E. B. Babcock and G. L. Stebbins Jr. 1936-6-8 1790 Lassen about 2 mi n Madeline; ; Madeline, Lassen Co. 1371 Comment
  CHSC5252  Swertia albicaulis var. nitida L. Harman 1946-6-23 Lassen Eagle Lake. Roop mountain. 2133 Comment
  CHSC12410  Symphoricarpos rotundifolius var. rotundifolius Lynn R. Thomas 1969-6-20 133 Lassen Road up Black Mt. N of Five Corners, ca. 3 mi S of E. L. B. S. 1706 Comment
  CHSC60349  Symphoricarpos rotundifolius var. rotundifolius Mary Ann Showers 1992-6-13 2532 Lassen Lassen Volcanic National Park. East shore of Butte Lake, ca 0.3 miles south of Butte Creek outlet. 1841 Comment