Search Results — 2000 specimen records retrieved (1769 records with coordinates)
(That's the default maximum. Contact Jason Alexander for larger data requests.)

Results for search: Collector=Roos;   

Mapping Options:

BerkeleyMapper with county and bioregion layers
BerkeleyMapper without layers.
KML export
(Note: only records with coordinates are mappable)

Download Options:
Select all records · Select records with coordinates

Include annotations and voucher information

PLEASE NOTE: Due to changes in newer versions of Excel, directly copying text from the above selected results does not produce a usable table.
    Follow these steps:
      1. The contents of the selected results window must be copied into a text editor like TextEdit for Mac or WordPad for Windows
      2. The selected results must be saved as a new text document.
      3. This new text document can now be copied into Excel or imported as a tab delimited text file.

(For large data reqests, please contact Jason Alexander, jason_alexander@berkeley.edu.)

 Please cite data retrieved from this page: Data provided by the participants of the Consortium of California Herbaria (ucjeps.berkeley.edu/cch_archive/).
 Records are made available under the CCH Data Use Terms.

Click on column header to sort data (* sorts by family); click in leftmost checkbox to select record. CCH Help Page.
Turn on yellow flags to show possible range discrepancies. Read more ...
? Specimen ID Determination * Collector Collection Date Collection Number County Locality Elevation in meters Feedback
  CLARK-A1528-3544  Abies concolor John C. Roos, Alfred R. Roos 1950-8-6 4911 San Bernardino Kingston Range 2133 Comment
  RSA44911  Abies concolor J. C. Roos, R. Weatherby 1949-9-2 3570 San Bernardino North slope of Kingston Peak, Mojave Desert. 2165 Comment
  UCR19104  Abronia nana subsp. covillei John C. Roos 1967-8-6 s.n. Inyo Northern Mojave Desert, Inyo Mountains, 2 mi. NE of Badger Flats Comment
  UCR23445  Abronia nana subsp. covillei John C. Roos 1946-9-21 3075 San Bernardino San Bernardino Mtns, NE of Big Bear Lake, Bear Valley 2073 Comment
  POM263166  Abronia nana var. covillei J. C. Roos 1937-7-27 328 San Bernardino East end of Bear Valley, San Bernardino Mountains Comment
  CLARK-A1528-2718  Acacia decurrens John C. Roos 1938-3-15 San Bernardino Loma Linda Comment
  RSA0023454  Acacia farnesiana subsp. minuta J. C. Roos 1937-8-30 2560 San Diego South of Otay. Comment
  CLARK-A1528-2722  Acacia melanoxylon John C. Roos 1943-8-5 Los Angeles Pomona Comment
  CLARK-A1528-1378  Acer glabrum John C. Roos 1948-7-3 3905 Inyo Panamint Mountains 2743 Comment
  CLARK-A1528-4904  Acer glabrum John C. Roos 1963-8-18 San Bernardino San Bernardino Mountains Comment
  UCR19708  Acer glabrum John C. Roos, A. R. Roos 1966-9-5 4915 San Bernardino Northeastern Mojave Desert, Kingston Peak 2165 Comment
  LA102160  Acer glabrum var. diffusum Alfred R. Roos; 1950-8-6 sn San Bernardino Kingston Range, N side of Kingston Range, pass on the road to Tecopa and slopes above 1523 Comment
  CLARK-A1528-1370  Acer macrophyllum John C. Roos 1946-8-31 2936 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-1371  Acer macrophyllum John C. Roos 1937-5-9 2088 San Bernardino Oak Glen Comment
  CLARK-A1528-2398  Acer macrophyllum John C. Roos 1965-6-6 San Bernardino San Bernardino Mountains Comment
  UCR23388  Achlys californica John C. Roos 1957-7-2 6646 Sonoma Miller Ridge Comment
  SEINET4692067 Image available Achnatherum coronatum J. C. Roos 1950-1 4817 Riverside Hills NE of summit of Reche Canyon 762 Comment
  UCSB37779  Achnatherum coronatum Roos, John 1965-6-26 San Bernardino Upper Santa Ana Canyon near Heart Bar Park, San Bernardino Mtns. Comment
  SEINET13387085 Image available Achnatherum hymenoides J. C. Roos 1965-1 San Bernardino Victorville, Mohave Desert Comment
  RSA450643  Achnatherum lemmonii var. lemmonii J. C. Roos 1965-7-17 s.n. San Bernardino Stetson Creek, Barton Flats, San Bernardino Mountains. Comment
  CAS-BOT-BC216429  Achnatherum lettermanii J. C. Roos 1965-7-17 s.n. San Bernardino Stetson Creek, Barton Flats, San Bernardino Mountains Comment
  POM263193  Achnatherum nelsonii subsp. dorei J. C. Roos 1937-7-26 337 San Bernardino Bear Valley, Pine Knot, San Bernardino Mts. Comment
  UC1117446  Achnatherum occidentale subsp. occidentale J. C. and A. R. Roos 1955-8-26 6556 Inyo n shoulder of Waucoba Mt. Inyo Mts., Waucoba Mt. 3352 Comment
  UC1023413  Achnatherum parishii J. C. and A. R. Roos 1950-8-5 4895 San Bernardino 1 1/2 mi sw on n slope of Clark Mtn. Coliseum Mine; eastern Mohave Desert, Clark Mtn. 1737 Comment
  CAS-BOT-BC218076  Achnatherum pinetorum John Roos; Lucille Roos 1951-8-8 5086 Inyo 3 miles NW of Cedar Flat, White Mountains 2590 Comment
  RSA71679  Achnatherum pinetorum J. C. Roos 1951-8-10 5130 Mono 1.5 miles N of Piute Mts, White Mts. 3567 Comment
  RSA79707  Achnatherum pinetorum J. C. Roos 1953-8-8 5939 Inyo Badger flat, Inyo Mountains 2652 Comment
  UC1026577  Achnatherum pinetorum J. C. and A. R. Roos 1954-6-12 6132 Inyo 1 mi ese Wild Rose Peak (ridge between Wild Rose and Trail Canyons); Panamint Mts. 2499 Comment
Read comments
Jan 20 2012
  RSA92157  Achnatherum pinetorum J. C. Roos 1954-6-12 6136 Inyo North face Wild Rose Peak at head of Trail canyon. 2683 Comment
  UC1023377  Achnatherum thurberianum John and Lucille Roos 1951-8-8 5087 Inyo 3 mi nw Cedar Flat; White Mts. 2590 Comment
  UCSB42196  Acmispon nevadensis var. davidsonii Roos, John 1965-6-26 San Bernardino Upper Santa Ana River, San Bernardino Mtns. Comment
  UCR23356  Adiantum capillus-veneris John C. Roos 1955-7-23 6512 Inyo Inyo Mountains, mouth of Beveridge Canyon, east base of mountains, Saline Valley 610 Comment
  UCR23354  Adiantum jordanii John C. Roos 1937-3-26 s.n. Santa Barbara South Coast Range, 20 mi east of Santa Maria along Cuyama River next to Hwy 166 Comment
  CLARK-A1528-3579  Adiantum pedatum subsp. aleuticum John C. Roos 1937-3-27 1330 Santa Barbara Solvang Comment
  RSA71680  Agoseris monticola J. C. Roos, L. Roos 1951-8-10 5131 Mono 1.5 miles north of Piute Mtn. White Mts. 3262 Comment
  RSA662543  Agropyron desertorum J. C. Roos 1960-7-4 s.n. Mono Crooked Creek, White Mtns. Comment
  CLARK-A1528-1281  Agrostis diegoensis John C. Roos 1939-6-8 Los Angeles Burbank Comment
  CLARK-A1528-4445  Agrostis diegoensis John C. Roos 1965-6-30 Riverside Santa Ana Mountains Comment
  POM263086  Agrostis exarata J. C. Roos 1937-7-31 412 San Bernardino Crestline, San Bernardino Mountains. Comment
  RSA664938  Agrostis hyemalis J. C. Roos 1937-7-25 s.n. San Bernardino Clarks Grade. (S. of Big Bear Lake) San Bernardino Mountains. Comment
  RSA263175  Agrostis idahoensis J. C. Roos 1937-8-18 465 Riverside Round Valley, San Jacinto Mountains. Comment
  RSA648068  Agrostis pallens J. C. Roos 1939-6-8 s.n. Los Angeles Canyon in hills N. of Burbank. Comment
Read comments
Feb 3 2011
  UCR23871  Agrostis pallens John C. Roos 1965-6-30 s.n. Riverside Santa Ana Mtns., Ortega Hwy Comment
  CLARK-A1528-1280  Agrostis scabra John C. Roos 1937-7-23 411 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-7824  Agrostis scabra John C. Roos 1937-8-18 494 Riverside San Jacinto Mountains Comment
  UCR23885  Agrostis stolonifera John C. Roos 1950-6-11 4829 San Bernardino San Bernardino Valley, Loma Linda, W Central Street 305 Comment
  CLARK-A1528-5191  Ailanthus altissima Alfred R. Roos 1949-7-21 Los Angeles Los Angeles Comment
  UCR23513  Alchemilla occidentalis John C. Roos 1950-4-22 4751 Riverside Hills NE of the summit of Reche Canyon 823 Comment
  UCR25758  Allionia incarnata John C. Roos 1937-4-25 798 San Bernardino Southeastern Mojave Desert, west of Essex Comment
  UCR25759  Allionia incarnata John C. Roos 1937-4-28 788 San Bernardino Southeastern Mojave Desert, near the Turtle Mountains Comment
  RSA47440  Allium atrorubens var. inyonis J. C. Roos 1949-6-27 4511 San Bernardino Kingston Mts. 2103 Comment
  CLARK-A1528-1504  Allium fimbriatum John C. Roos 1947-6-21 3704 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-1507  Allium haematochiton John C. Roos 1935-2-24 San Diego National City Comment
  POM264307  Allium haematochiton J. C. Roos 1937-3-10 634 Riverside Norco hills. Comment
  UCR27415  Allium haematochiton John C. Roos 1950-3-18 4714 Riverside Peninsular Range, 3 - 4 mi north of Murrietta in the hills 457 Comment
  UCR18565  Allium lacunosum var. davisiae John C. Roos 1967-5-20 s.n. San Bernardino San Bernardino Mtns., Deep Creek Comment
  RSA47439  Allium nevadense J. C. Roos, L. Roos 1949-5-29 4369 San Bernardino Coliseum Mine, Clark Mountain. 1677 Comment
  SEINET8467245 Image available Allium peninsulare J. C. Roos 1948-5-22 3865 Riverside In a canyon SE of the summit of Reche Canyon 732 Comment
  UCR18569  Allium praecox John C. Roos 1950-3-27 4718 San Bernardino San Bernardino Valley, steep north slope of Slover Mtn. 351 Comment
  CLARK-A1528-3457  Allophyllum divaricatum John C. Roos 1965-6-12 San Bernardino San Bernardino Mountains Comment
  UCR18793  Alnus incana subsp. tenuifolia John C. Roos 1945-9-1 3953 Siskiyou Salmon Mountains, mountains southwest of Etna 1829 Comment
  CLARK-A1528-2278  Alnus rhombifolia John C. Roos 1948-5-8 3828 Riverside Whitewater 518 Comment
  CLARK-A1528-5008  Alnus rhombifolia John C. Roos 1937-8-23 2403 San Bernardino Snow Creek Comment
  CLARK-A1528-4452  Alopecurus aequalis John C. Roos 1965-7-18 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-108  Amaranthus albus John C. Roos 1951-9-25 5267 Riverside Riverside 259 Comment
  CLARK-A1528-109  Amaranthus albus John C. Roos 1951-9-27 5303 San Bernardino Loma Linda Comment
  CLARK-A1528-7784  Amaranthus albus John C. Roos 1965-7-27 Riverside Hemet Comment
  UCR25146  Amaranthus albus John C. Roos 1965-7-4 s.n. San Bernardino San Bernardino Valley, Loma Linda 306 Comment
  UCR20310  Amaranthus blitoides John C. Roos 1965-7-27 s.n. Riverside Hemet Comment
  RSA648015  Amaranthus deflexus J. C. Roos 1965-6-20 s.n. San Bernardino Lawn in Loma Linda. Comment
  CLARK-A1528-1395  Amaranthus fimbriatus John C. Roos 1963-10-23 Riverside Chuckwalla Mountains Comment
  RSA89984  Amaranthus fimbriatus J. C. Roos 1950-9-3 4981 San Bernardino Valley Wells 1128 Comment
  CLARK-A1528-1400  Amaranthus hybridus John C. Roos 1937-8-27 737 San Bernardino San Bernardino Comment
  UCSB37368  Amaranthus hybridus Roos, Alfred 1937-12-2 Orange Santa Ana Comment
  CLARK-A1528-2403  Amaranthus palmeri John C. Roos 1951-9-19 5223 San Bernardino Loma Linda 335 Comment
  UCR19182  Amaranthus palmeri John C. Roos 1965-9-28 s.n. Riverside San Jacinto Valley, Hemet Comment
  CLARK-A1528-5481  Amaranthus palmeri Alfred R. Roos 1936-9-25 San Bernardino Comment
  CLARK-A1528-5235  Amaranthus retroflexus John C. Roos 1937-8-17 2406 Riverside San Jacinto Comment
  UCSB59695  Amaranthus retroflexus Roos, John 1965-8-4 Riverside Arlington Comment
  POM265639  Amaranthus spinosus J. C. Roos 1937-11-1 2282 Los Angeles Van Nuys Comment
  POM263162  Ambrosia acanthicarpa J. C. Roos 1937-8-19 359 Riverside Thomas Valley, San Jacinto Mts. Comment
  POM266300  Ambrosia acanthicarpa J. C. Roos 1942-9-19 1711 Los Angeles West Los Angeles. Comment
  RSA648062  Ambrosia confertiflora J. C. Roos 1943-4-10 2613 San Bernardino Loma Linda. Comment
  CLARK-A1528-4996  Ambrosia dumosa John C. Roos 1948-4-24 3796 Riverside Whitewater Comment
  UC1494270  Ambrosia monogyra J. C. Roos 1947-5-11 3608 San Bernardino n of Rialto (Fontana Power Station) Comment
  CLARK-A1528-1532  Ambrosia psilostachya John C. Roos 1938-8-19 San Bernardino Santa Ana River Comment
  UCSB45945  Ambrosia psilostachya Roos, Alfred 1937-11-15 San Bernardino Loma Linda Comment
  CLARK-A1528-147  Ambrosia psilostachya var. californica John C. Roos 1951-9-24 5243 San Bernardino Loma Linda Comment
Read comments
Aug 20 2014
  UCR24366  Ambrosia pumila John C. Roos 1937-8-29 2549 San Diego Bonsall Comment
  CLARK-A1528-1544  Ambrosia trifida John C. Roos 1937-9-7 Los Angeles North Hollywood Comment
  POM265818  Ammannia coccinea J. C. Roos 1937-6-14 926 San Diego La Mesa Comment
  UCR26251  Ammannia coccinea John C. Roos 1937-6-14 926 San Diego La Mesa Comment
  POM262978  Amorpha californica var. napensis J. C. Roos 1939-4-29 289 Napa Angwin, Howell Mountain Comment
  UCSB42198  Amorpha fruticosa var. occidentalis John C. Roos 1966-5-5 Riverside collected in Gilman Hot Springs of the San Jacinto Valley Gilman Hot Springs Comment
  CLARK-A1528-7815  Amsinckia tessellata John C. Roos 1949-4-8 4191 Imperial Milpitas Wash Comment
  RSA92575  Amsinckia tessellata J. C. Roos, L. Roos 1952-5-10 5627 San Bernardino Kremer Hills {Kramer Hills} 854 Comment
  UC1023395  Anagallis arvensis John C. Roos 1951-7-13 5064 San Bernardino Loma Linda 323 Comment
  UCR25112  Anagallis arvensis John C. Roos 1951-7-13 5064 San Bernardino San Bernardino Valley, Loma Linda 323 Comment
  RSA78387  Anagallis arvensis J. C. Roos 1951-7-13 5064 San Bernardino Loma Linda, Irrigated garden. 323 Comment
  RSA457399  Andropogon glomeratus J. C. Roos 1965-7-11 s.n. Inyo Furnace Creek, Death Valley. Comment
  RSA457400  Andropogon glomeratus J. C. Roos 1938-11-5 s.nn. San Bernardino Arrowhead Hot Springs, south side of San Bernardino Mountains. Comment
  CAS-BOT-BC137834  Andropogon glomeratus var. glomeratus John Roos; Lucille Roos 1950-11-4 5023 San Bernardino Arrowhead Hot Springs, south base San Bernardino Mountains. 609 Comment
  UC1010324  Andropogon glomeratus var. pumilus John and Lucille Roos 1950-11-4 5023 San Bernardino s base San Bernardino Mts. Arrowhead Hot Springs; , Arrowhead Hot Springs 609 Comment
  CLARK-A1528-5584  Andropogon virginicus John C. Roos 1947-1-26 3204 Inyo Death Valley Comment
  CLARK-A1528-1547  Anisocoma acaulis John C. Roos 1952-5-17 5678 Los Angeles Mojave Desert 914 Comment
  CLARK-A1528-1549  Antennaria media John C. Roos 1941-8-27 37 San Bernardino San Bernardino Mountains 3352 Comment
  RSA71678  Antennaria pulchella J. C. Roos, L. Roos 1951-8-10 5129 Mono 1.5 miles N of Piute Mts, White Mts. 3567 Comment
  CLARK-A1528-1551  Antennaria rosea John C. Roos 1965-6-26 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-5127  Antennaria rosea John C. Roos 1939-6-3 6/ 3 /39 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-1550  Antennaria rosea John C. Roos, Lucille Roos 1951-8-11 5176 Mono White Mountains 3505 Comment
  RSA659725  Anthemis cotula J. C. Roos 1965-6-29 s.n. San Bernardino Bryn Mawr, 366 Comment
  CLARK-A1528-4163  Antirrhinum kelloggii John C. Roos 1956-4-8 6574 Ventura Potrero Valley Comment
  CLARK-A1528-4165  Antirrhinum nuttallianum John C. Roos 1937-5-2 1398 Riverside La Sierra Comment
  CLARK-A1528-5198  Antirrhinum nuttallianum John C. Roos 1966-4-29 Riverside Comment
  POM262976  Antirrhinum nuttallianum subsp. nuttallianum J. C. Roos 1941-4-19 176 Riverside Reche Canyon - 'Plateau' [Label indicates San Bernardino Co.] Comment
  UC1236266  Anulocaulis annulatus John C. Roos 1955-5-13 6350 Inyo n.e. Eureka Valley (w. base of Last Chance Mts.); Last Chance Mts. 1158 Comment
  CLARK-A1528-1418  Apiastrum angustifolium John C. Roos 1938-3-28 728 Riverside La Sierra Comment
  CLARK-A1528-1422  Apiastrum angustifolium John C. Roos 1937-3-24 1340 Riverside Pigeon Pass Comment
  CLARK-A1528-1471  Apocynum androsaemifolium John C. Roos 1946-9-21 3052 San Bernardino San Bernardino Mountains 2042 Comment
  RSA450127  Apocynum androsaemifolium subsp. pumilum J. C. Roos 1965-7-17 s.n. San Bernardino Stetson Creek, Barton Flats, San Bernardino Mountains. Comment
  CLARK-A1528-1075  Apocynum cannabinum var. glaberrimum John C. Roos 1937-7-14 395 San Bernardino 304 Comment
  CLARK-A1528-1478  Apocynum pumilum John C. Roos 1946-9-21 3053 San Bernardino San Bernardino Mountains 2042 Comment
  UCR23248  Arabis glaucovalvula John C. Roos 1947-4-20 3515 Inyo Northern Mojave Desert, Panamint Mtns: Emigrant Pass 1555 Comment
  RSA44903  Arabis holboellii var. pinetorum J. C. Roos 1949-6-27 3717 San Bernardino S Fork of Santa Ana River, San Bernardino Mts 2134 Comment
  CLARK-A1528-2285  Arabis lemmonii John C. Roos 1951-8-10 5144 Mono White Mountains 4145 Comment
  RSA71690  Arabis lemmonii J. C. Roos, L. Roos 1951-8-10 5144 Mono East face White Mtn. Peak, White Mountains. 4146 Comment
  RSA0129930  Arabis lemmonii J. C. Roos 1937-8-8 2191 Inyo Lone Pine Canyon. 2744 Comment
  CLARK-A1528-341  Arabis parishii John C. Roos 1970-5-23 San Bernardino San Bernardino Mountains 2773 Comment
  UCR25786  Arabis platysperma John C. Roos 1937-8-8 981 Inyo Sierra Nevada Mtns., Lone Pine Canyon below Mt. Whitney 3506 Comment
  UCR25680  Arabis sparsiflora John C. Roos, A. R. Roos 1953-8-9 5962 Inyo Northern Mojave Desert Region, Inyo Mountains, near head of Tamarack Canyon 3049 Comment
  POM301544  Arbutus menziesii J. C. Roos 1942-3-21 1095 Los Angeles Chantry Flats, Santa Anita Canyon Comment
  UCR23750  Arceuthobium abietinum John C. Roos 1937-7-20 1917 San Bernardino San Bernardino Mtns, Barton Flats Comment
  UCR23745  Arceuthobium californicum John C. Roos 1947-6-14 3675 San Bernardino San Bernardino Mtns, Crestline 1585 Comment
Read comments
Sep 23 2006
  UCR26241  Arceuthobium divaricatum John C. Roos 1947-7-12 2864 Inyo Northern Mojave Desert, Mahogany Flats, Panamint Mountains 2500 Comment
  CAS-BOT-BC76268  Arctomecon merriamii John Roos; Lucille Roos 1954-5-8 6099 Inyo Grapevine Mountains above Leadfield. 1584 Comment
  CLARK-A1528-3401  Arctomecon merriamii John C. Roos, Lucille Roos 1954-3-27 6053 Inyo Grapevine Mountains Comment
  UCR23643  Arctostaphylos andersonii John C. Roos 1940-6-13 1546 Monterey 3 or 4 mi east of Castroville. Comment
  UCR23644  Arctostaphylos glandulosa John C. Roos 1939-4-16 276 Napa North Coast Range, Pacific Union College, Angwin, [Pope Valley] 240 Comment
  CLARK-A1528-3045  Arctostaphylos nummularia John C. Roos 1957-7-1 6622 Mendocino Little River Comment
  POM302569  Arctostaphylos pungens J. C. Roos 1943-5-23 2652 San Bernardino Little San Bernardino Mountains. 1524 Comment
  UCR23646  Arctostaphylos pungens John C. Roos 1949-6-21 4435 San Bernardino Eastern Mojave Desert, New York Mtns, near Keystone Canyon 2134 Comment
  UCR18879  Arenaria douglasii John C. Roos 1952-5-26 5726 Riverside Reche Canyon 427 Comment
  CLARK-A1528-2443  Arenaria kingii subsp. compacta John C. Roos 1949-6-21 3557 San Bernardino New York Mountains 2224 Comment
  RSA79698  Arenaria kingii subsp. compacta J. C. Roos 1953-8-9 5954 Inyo Inyo Mountains: Head of Tamarack Canyon; Inyo Mountains 3110 Comment
  UCR23670  Arenaria lanuginosa subsp. saxosa John C. Roos 1965-7-17 s.n. San Bernardino San Bernardino Mountains, South Fork [of the Santa Ana River] near Barton Flats 2439 Comment
  POM262937  Arenaria ursina J. C. Roos 1939-5-26 719 San Bernardino Bear Valley, San Bernardino Mts. Comment
  RSA45220  Argemone corymbosa J. C. Roos, L. Roos 1949-5-14 4304 San Bernardino Mojave Desert: 6 miles east of Lucerne Valley 915 Comment
  HSC78586  Arida carnosa J. C. Roos 1956-8-2 5691 San Bernardino N side of Hwy. 99, 0.2 miles West of Waterman Ave. Comment
  LA102277  Arida carnosa John C. Roos; 1956-8-2 6591 San Bernardino N side of Highway 99, 0.2 mi. W of Waterman Ave Comment
  UCSB49865  Arida carnosa Roos, John 1956-8-2 San Bernardino North side of Highway 99, 0.2 miles west of Waterman Ave., San Bernardino Valley Comment
  RSA648674  Aristida adscensionis J. C. Roos 1946-10-26 3143 Riverside in the Chuckwalla Mtns., Colorado Desert. Comment
  UCR23923  Aristida adscensionis John C. Roos 1937-6-26 1246 San Bernardino San Bernardino Valley, Redlands, Smiley Heights Comment
  UCR23924  Aristida adscensionis John C. Roos 1942-1-1 875 San Bernardino Mojave Desert, Los Padres Mine, south of Emerson Dry Lake 800 Comment
  CLARK-A1528-1263  Aristida californica John C. Roos 1946-9-14 3007 Riverside Dos Palmas Spring 1066 Comment
  CLARK-A1528-4465  Aristida californica John C. Roos 1937-8-22 1209 Riverside Mojave Desert Comment
  CLARK-A1528-4473  Aristida longiseta var. robusta John C. Roos, Alfred R. Roos 1950-8-5 4906 San Bernardino Clark Mountain Range 1280 Comment
  RSA659771  Aristida purpurea J. C. Roos 1951-10-19 5325 Riverside Badlands at Old Jackrabbit trail 610 Comment
Read comments
Mar 20 2011
  SEINET244838 Image available Aristida purpurea J. C. Roos 1949-4-8 4198 Riverside Imperial Co., Calif. Comment
  UCSB45623  Aristida purpurea Roos, John; Roos, Lucille 1950-10-21 Riverside Wonderland of Rocks, Little San Bernardino Mtns 1219 Comment
  POM264638  Aristida purpurea var. fendleriana J. C. Roos 1938-8-7 583 Riverside Pinyon Flats Camp, Santa Rosa Mountains. 1220 Comment
Read comments
Apr 3 2011
  RSA47322  Aristida purpurea var. fendleriana J. C. Roos, L. Roos 1949-6-22 4443 San Bernardino Barnwell, New York Mountains 1463 Comment
  UCR23878  Aristida purpurea var. fendleriana John C. Roos 1949-6-22 4443 San Bernardino Eastern Mojave Desert, New York Mtns, Barnwell 1494 Comment
  UCR23880  Aristida purpurea var. fendleriana John C. Roos 1949-6-22 4440 San Bernardino Eastern Mojave Desert, New York Mtns., at and near Lecyr Well 1524 Comment
  UC1105692  Aristida purpurea var. nealleyi John C. Roos 1955-5-13 6338 Inyo e Eureka Valley sand dunes (w base of mts.); Last Chance Mts. 1219 Comment
  POM266629  Aristida purpurea var. parishii J. C. Roos 1940-2-17 891 San Bernardino Reche Canyon, off San Bernardino Valley. Comment
  UCR26239  Aristida purpurea var. parishii John C. Roos 1948-5-15 3840 Riverside Sonoran (Colorado) Desert, Eagle Mountains, upper Lost Palms Canyon 1037 Comment
  UCR23879  Aristida purpurea var. purpurea John C. Roos 1940-5-25 1897 San Bernardino San Bernardino Mtns, in a small canyon south of the mouth of the Santa Ana Canyon, above Highland Comment
  CLARK-A1528-4491  Aristida wrightii John C. Roos 1938-8-7 582 Riverside San Jacinto River 701 Comment
  RSA71399  Arnica parryi subsp. sonnei J. C. Roos, L. Roos 1951-8-11 5171 Mono Campito Meadow, White Mts. 3323 Comment
  CLARK-A1528-1558  Artemisia bigelovii John C. Roos 1950-9-3 4973 San Bernardino Clark Mountain 1828 Comment
  UCR18633  Artemisia bigelovii John C. Roos 1948-9-19 s.n. San Bernardino Eastern Mojave Desert, Clark Mountain 1523 Comment
  CLARK-A1528-1567  Artemisia douglasiana John C. Roos 1937-8-17 1219 Riverside San Jacinto Comment
  RSA662533  Artemisia douglasiana J. C. Roos 1965-10-2 s.n. San Bernardino Mentone. Comment
  CLARK-A1528-1564  Artemisia douglasiana John C. Roos 1968-10-12 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-155  Artemisia dracunculus John C. Roos 1951-9-23 Riverside Reche Canyon Comment
  RSA71391  Artemisia dracunculus J. C. Roos, L. Roos 1951-8-10 5163 Mono NE face Sheep Mtn. 3537 Comment
  CLARK-A1528-1579  Artemisia ludoviciana John C. Roos 1937-3-1 2480 San Bernardino Victorville Comment
  UCR18745  Artemisia ludoviciana John C. Roos 1965-10-30 s.n. San Bernardino San Bernardino Mtns., Fish Creek Comment
  UCR24363  Artemisia ludoviciana John C. Roos 1961-9-2 s.n. Inyo Northern Mojave Desert, Inyo Mtns., below Side Hill Spring 2805 Comment
  RSA45477  Artemisia ludoviciana subsp. albula J. C. Roos 1948-9-18 4058 San Bernardino Clark Mts. 1768 Comment
  OBI40200  Artemisia ludoviciana subsp. incompta John C. Roos 1948-9-7 4000 Mono Tioga Pass 2682 Comment
  UC1506369  Artemisia ludoviciana subsp. incompta J. C. Roos 1948-9-7 4000 Mono Tioga Pass 2682 Comment
Read comments
Sep 29 2010
  UCR31736  Artemisia ludoviciana subsp. incompta John C. Roos, L. Roos 1948-9-7 4000 Mono Sierra Nevada Mtns, Tioga Pass 2683 Comment
  CAS-BOT-BC90798  Artemisia michauxiana J. C. Roos; A. R. Roos 1955-8-26 6555 Inyo Summit Waucoba Mt., Inyo Mts. 3383 Comment
  CAS-BOT-BC90799  Artemisia michauxiana John Roos; Lucille Roos 1951-8-10 5143 Mono east slope White Mtn. Peak, White Mts. 4145 Comment
  UCR24397  Artemisia norvegica John C. Roos, A. R. Roos 1955-8-26 6555 Inyo Northern Mojave Desert, Inyo Mountains, summit of Waucoba Mtn 3384 Comment
  UCR30514  Artemisia norvegica John C. Roos 1948-9-7 4010 Mariposa Sierra Nevada Mtns, about 5 mi north of Yosemite Valley 2439 Comment
  CAS-BOT-BC90835  Artemisia nova John Roos; Lucille Roos 1947-9-20 2810 Inyo Wild Rose Canyon, Panamint Mts. 2133 Comment
  CLARK-A1528-1586  Artemisia nova John C. Roos 1947-9-20 2805 Inyo Panamint Mountains 2590 Comment
  CLARK-A1528-1592  Artemisia spinescens John C. Roos 1938-4-18 Inyo Death Valley National Park Comment
  POM274214  Artemisia tridentata J. C. Roos 1947-9-19 2803 Inyo Panamint Mountain Range, south slope Baldy Peak 2988 Comment
  RSA155760  Artemisia tridentata J. C. Roos, A. R. Roos 1955-8-26 6558 Inyo Summit of Waucoba Mountain, Inyo Mountains 3384 Comment
  CLARK-A1528-1596  Artemisia tridentata subsp. parishii John C. Roos 1937-8-11 2527 Los Angeles Newhall Comment
  CAS-BOT-BC93596  Artemisia tridentata subsp. tridentata John Roos; Lucille Roos 1951-8-8 5089 Inyo 3 miles NW of Cedar Flat, White Mts. 2590 Comment
  CAS-BOT-BC93597  Artemisia tridentata subsp. tridentata John Roos; Lucille Roos 1947-9-19 2796 Inyo On S.E. face of Telescope Peak, Panamint Mts. 3352 Comment
  LA102369  Artemisia tridentata subsp. tridentata Alfred R. Roos; 1950-8-6 sn San Bernardino Kingston Range, N side of Kingston Range, pass on the road to Tecopa and slopes above 1523 Comment
  RSA34199  Artemisia tridentata subsp. vaseyana J. C. Roos 1947-9-20 2806 Inyo Wild Rose Canyon, Panamint Mts. 2378 Comment
  RSA71783  Artemisia tridentata subsp. vaseyana J. C. Roos, L. Roos 1951-8-8 5089 Inyo 3 miles NW of Cedar Flat, White Mountains 2591 Comment
  RSA45482  Asclepias asperula subsp. asperula J. C. Roos 1948-9-18 4042 San Bernardino North side of Clark Mountain, SW of Colisseum Mine 1921 Comment
  UCR30516  Asclepias fascicularis John C. Roos 1947-6-21 3699 San Bernardino San Bernardino Mtns, Cushenbury Canyon, alkaline springs [probably Whiskey Springs] on north side of the mountains 1677 Comment
  CLARK-A1528-3183  Asparagus officinalis John C. Roos 1965-9-19 San Bernardino Loma Linda Comment
  UCR23353  Asplenium vespertinum John C. Roos 1942-3-28 1087 San Bernardino San Bernardino Valley, Canyon above plateau, Reche Canyon, near Loma Linda Comment
  RSA0011743  Asplenium vespertinum J. C. Roos 1941-3-8 211 San Bernardino Reche Canyon. Comment
  UCR24401  Aster alpigenus John C. Roos 1937-8-18 2539 Riverside San Jacinto Mountains, Taquitz Valley 2500 Comment
  CLARK-A1528-1101  Aster canescens John C. Roos 1953-8-8 5941 Inyo Inyo Mountains 2651 Comment
  CLARK-A1528-1609  Aster hesperius John C. Roos 1946-10-2 3104 San Bernardino Comment
  RSA658427  Aster hesperius J. C. Roos 1965-9-18 s.n. Inyo Owens Valley west side of Owens Lake 1098 Comment
  CLARK-A1528-5445  Aster menziesii John C. Roos 1951-10-19 Riverside San Timoteo Canyon dry, semi-alkaline road side; with Artemisia douglasiana and Distichlis stricta; ; El Casco 7.5' 609 Comment
  CLARK-A1528-7794  Aster pauciflorus John C. Roos 1949-6-28 4527 Inyo Tecopa 426 Comment
  UCR31676  Aster pauciflorus John C. Roos, A. R. Roos 1950-8-7 4923 Inyo Northern Mojave Desert, Tecopa in Amargosa River Valley 427 Comment
  RSA48863  Aster subulatus var. ligulatus J. C. Roos 1949-9-25 4668 San Bernardino Shops buildings, Loma Linda 320 Comment
Read comments
May 21 2011
  CLARK-A1528-5566  Astragalus allochrous John C. Roos 1949-4-10 4228 Riverside Chuckwalla Mountains Comment
  RSA45536  Astragalus aridus J. C. Roos 1949-3-26 4117 Riverside Coachella Valley, Indio. Comment
  CLARK-A1528-2733  Astragalus coccineus John C. Roos 1941-4-5 186 San Bernardino Little San Bernardino Mountains Comment
  UCR23960  Astragalus coccineus John C. Roos 1942-5-1 1115 San Bernardino Mojave Desert, Little San Bernardino Mtns., Quail Springs 1159 Comment
  RSA85080  Astragalus didymocarpus J. C. Roos 1952-4-9 850 Riverside Fairmount Park 259 Comment
  UCSB45527  Astragalus didymocarpus Roos, John 1952-4-30 Riverside Hills between Camp Haan and Riverside 518 Comment
  RSA450177  Astragalus didymocarpus var. dispermus J. C. Roos 1966-4-6 s.n San Bernardino Kramer Hills. Comment
  CLARK-A1528-1157  Astragalus douglasii John C. Roos 1937-6-14 1465 San Diego Descanso 1036 Comment
  UCR23853  Astragalus douglasii John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, east end of Bear Valley Comment
  RSA0006766  Astragalus gilmanii J. C. Roos 1948-7-4 3898 Inyo Mahogany Flats Panamint Mts. Mojave desert. 2468 Comment
  UCR18937  Astragalus insularis var. harwoodii John C. Roos, Lucille Roos 1949-4-10 4222 Riverside Sonoran (Colorado) Desert, N base of the Chuckwalla Mountains Comment
  RSA0006768  Astragalus insularis var. harwoodii J. C. Roos, Lucille Roos 1949-4-11 4241 Riverside Corn Spring, Cuckawalla Mts. Comment
  RSA0037331  Astragalus insularis var. harwoodii John C. Roos 1958-3-15 s.n. Riverside Chuckwalla Mtns., 3 miles SE of Desert Center. Comment
  GH366290  Astragalus inyoensis J. C. Roos 1955-5-15 6371 Unknown 0.5 miles west of Willow Spring. Last Chance Mts. 1767 Comment
  NY674619  Astragalus inyoensis J. C. Roos 1955-5-15 6371 Inyo 0.5 mile west of Willow Spring. Last Chance Mountains 1768 Comment
  RSA105022  Astragalus inyoensis J. C. Roos 1955-5-15 6371 Inyo Last Chance Mountains: 0.5 miles west of Willow Springs. 1767 Comment
  CLARK-A1528-1161  Astragalus lentiginosus John C. Roos 1963-7-27 362 Inyo White Mountains 3108 Comment
  CLARK-A1528-4958  Astragalus lentiginosus John C. Roos 1947-4-19 3465 Inyo Death Valley National Park Comment
  CLARK-A1528-7805  Astragalus lentiginosus var. borreganus John C. Roos 1949-4-7 4166 Imperial Comment
  CLARK-A1528-5424  Astragalus lentiginosus var. fremontii John C. Roos 1949-5-28 4341 San Bernardino Clark Mountain Range Comment
  CAS-BOT-BC187309  Astragalus lentiginosus var. micans John C. Roos 1955-5-13 6354 Inyo SE end Eureka Valley 929 Comment
  CAS-BOT-BC27705  Astragalus lentiginosus var. micans John C. Roos 1955-5-13 6354 Inyo Lower sloopes of sand dunes at SE end of Eureka Valley, E of Inyo Mts. 929 Comment
  UCR23957  Astragalus lentiginosus var. micans John C. Roos 1955-5-13 6354 Inyo Northern Mojave Desert, SE end of Eureka Valley 945 Comment
  NY675942  Astragalus lentiginosus var. semotus J. C. Roos 1953-8-9 5965 Inyo Upper end of Tamarack Canyon, Inyo Mountains 3109 Comment
  CLARK-A1528-5068  Astragalus lentiginosus var. sierrae John C. Roos 1937-7-23 1985 San Bernardino San Bernardino Mountains 2042 Comment
  UCSB42212  Astragalus minthorniae var. villosus Roos, John 1949-5-29 San Bernardino Near Greenes Mine, Clark Mtn. 1584 Comment
  RSA85155  Astragalus mohavensis var. hemigyrus J. C. Roos 1954-3-25 6048 Inyo Wildrose Canyon below Wildrose Spring, Panamint Mts. 1097 Comment
  UCR30500  Astragalus oophorus John C. Roos, A. R. Roos 1953-8-11 5987 Inyo N Mojave Desert, Inyo Mtns: 2 mi east of Blue Bell Mine 2866 Comment
  UCR30627  Astragalus palmeri John C. Roos 1947-3-15 3347 Riverside Sonoran (Colorado) Desert, mouth of Deep Canyon Comment
  UCR25856  Astragalus pomonensis John C. Roos 1941-4-19 166 Riverside Reche Canyon. Comment
  CLARK-A1528-2757  Astragalus purshii John C. Roos 1967-5-30 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-5103  Astragalus purshii Alfred R. Roos, John C. Roos 1953-8-9 Inyo Inyo Mountains infrequent in open places in pine forest; on rocky, dry north and west slopes; with Pinus aristata, Penstemon scapiodes, etc.; 3047 Comment
  CLARK-A1528-2759  Astragalus sabulonum John C. Roos 1949-3-26 Riverside Mecca Comment
  UC1080611  Astragalus serenoi var. shockleyi John C. Roos 1955-5-15 6372 Inyo 0.5 mi w Willow Spring (Last Chance Mts., along edge gravelly rocky wash); Last Chance Mts., w of Willow Spring 1767 Comment
  CLARK-A1528-5528  Astragalus tricarinatus John C. Roos 1967-3-25 Riverside Whitewater Canyon 457 Comment
  CLARK-A1528-2295  Athysanus pusillus John C. Roos 1947-3-21 3363 Riverside Reche Canyon Comment
  CLARK-A1528-1617  Atrichoseris platyphylla John C. Roos 1966-3-26 Riverside Chuckwalla Mountains Comment
  RSA450769  Atrichoseris platyphylla J. C. Roos 1966-3-26 s.n. Riverside 2 mi S.E. of Desert Center. Comment
  UCR24409  Atrichoseris platyphylla John C. Roos 1966-3-26 s.n. Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 mi SE of Desert Center 366 Comment
  CAS-BOT-BC170585  Atriplex J. C. Roos 1965-10-17 s.n. Riverside 20 miles west of Blythe on the roadside. Comment
  CLARK-A1528-2534  Atriplex argentea subsp. expansa John C. Roos 1946-9-21 3061 San Bernardino Lucerne Valley 914 Comment
  UCR23327  Atriplex argentea subsp. expansa Alfred R. Roos 1947-7-22 s.n. San Bernardino San Bernardino Valley, Loma Linda 305 Comment
  CLARK-A1528-2539  Atriplex canescens John C. Roos 1946-9-21 3083 San Bernardino San Bernardino Mountains 1234 Comment
  CLARK-A1528-2542  Atriplex canescens John C. Roos 1948-6-11 San Bernardino Mountain Pass Comment
  CLARK-A1528-5655  Atriplex canescens John C. Roos 1965-7-21 San Bernardino Victorville Comment
  RSA452409  Atriplex canescens A. R. Roos 1923-11-8 s.n. San Bernardino Vicinity of San Bernardino Comment
  NY526835  Atriplex confertifolia A. R. Roos 1953-8-10 5978 Inyo Mazourka Canyon, Inyo Mountains 2438.4 Comment
  RSA592427  Atriplex confertifolia J. C. Roos 1965-7-6 s.n. San Bernardino At the cement plant, Victorville. Comment
  RSA79646  Atriplex confertifolia J. C. Roos, A. Roos 1953-8-10 5978 Inyo Inyo Mountains, Mazourka Canyon. 2439 Comment
  UCR18889  Atriplex confertifolia John C. Roos 1965-7-6 s.n. San Bernardino Mojave Desert, Victorville cement plant Comment
  CLARK-A1528-2537  Atriplex coronata var. notatior John C. Roos 1952-5-14 5668 Riverside San Jacinto River 426 Comment
  UCR24121  Atriplex coronata var. notatior John C. Roos 1965-6-30 s.n. Riverside Perris-Aguanga Basin region, Perris Comment
  UCR27595  Atriplex davidsonii John C. Roos 1962-5-24 s.n. Riverside San Jacinto Valley, Flats west of Hemet Comment
  UCR18891  Atriplex elegans John C. Roos 1965-9-23 s.n. San Bernardino Mojave Desert, roadside in Barstow Comment
  CLARK-A1528-6886  Atriplex elegans subsp. fasciculata John C. Roos 1965-7-6 San Bernardino Barstow Comment
  CLARK-A1528-2516  Atriplex elegans subsp. fasciculata John C. Roos 1937-4-23 2121 San Bernardino Colorado Desert Comment
  RSA591762  Atriplex elegans var. fasciculata J. C. Roos 1937-8-24 1205 San Bernardino Barstow, Mojave Desert Comment
  CLARK-A1528-2521  Atriplex hymenelytra John C. Roos 1937-12-28 Inyo Olancha Comment
  POM263132  Atriplex hymenelytra J. C. Roos 1937-12-28 200 Inyo Near Olancha. Comment
  UCR25942  Atriplex hymenelytra John C. Roos 1947-1-25 3212 Inyo Northern Mojave Desert, Death Valley National Monument [Park], Badwater -61 Comment
  CAS-BOT-BC169155  Atriplex lentiformis John Roos; Lucille Roos 1954-10-2 6252 San Bernardino 237 S. Waterman, San Bernardino 320 Comment
  UCR18895  Atriplex leucophylla John C. Roos 1949-10-1 4677 Orange South Coast, Doheny Beach 0 Comment
  OBI40177  Atriplex muelleri J. C. Roos 1965-10-17 s.n. Riverside 20 mi W of Blythe on the roadside Comment
  UC1519870  Atriplex muelleri J. C. Roos 1965-10-17 Riverside on the roadside 20 mi w Blythe; w of Blythe Comment
  UCR24187  Atriplex parishii John C. Roos 1937-8-17 1214 Riverside 5 mi west of Hemet [Hwy 74 near Homeland] Comment
  UCR30767  Atriplex parryi John C. Roos, A. R. Roos 1950-8-7 4926 Inyo Northern Mojave Desert, Tecopa in Amargosa River Valley 427 Comment
Read comments
Sep 26 2010
  CLARK-A1528-1183  Atriplex patula subsp. hastata John C. Roos 1949-10-1 4678 Orange Doheney Beach 1-3 Comment
  UC1042968  Atriplex phyllostegia John and Lucille Roos 1954-5-6 6074 Inyo Amargosa River 4 mi n Shoshone; Amargosa River n of Shoshone 518 Comment
  CLARK-A1528-2498  Atriplex polycarpa John C. Roos 1954-8-13 6205 Inyo Eureka Valley 914 Comment
  UCR18898  Atriplex polycarpa Alfred R. Roos 1948-9-15 s.n. Los Angeles Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale Comment
  RSA52770  Atriplex prostrata J. C. Roos 1949-11-27 4701 Kern Monolith Dry Lake 1204 Comment
  CLARK-A1528-2502  Atriplex rosea Alfred R. Roos 1948-8-21 Los Angeles Long Beach Comment
  CLARK-A1528-401  Atriplex semibaccata John C. Roos 1951-9-25 5278 Riverside Riverside 259 Comment
  UCR18899  Atriplex serenana John C. Roos 1965-8-3 s.n. Riverside Gilman Hot Springs Comment
  RSA592495  Atriplex torreyi J. C. Roos 1965-9-13 s.n. San Bernardino Victorville. Comment
  RSA85278  Atriplex torreyi J. C. Roos, A. Roos 1950-8-8 4931 San Bernardino Rabbit Springs, Lucerne Valley. 884 Comment
  RSA85279  Atriplex torreyi J. C. Roos, A. Roos 1950-8-8 4930 San Bernardino 1 mile N. of Oro Grande. 793 Comment
  UCR18900  Atriplex torreyi John C. Roos 1965-9-13 s.n. San Bernardino Mojave Desert, Victorville Comment
  HSC78531  Atriplex truncata A. R. Roos 1950-8-8 San Bernardino Rabbit Springs, Lucerne Valley, S Mojave Desert. 915 Comment
  RSA52807  Atriplex truncata J. C. Roos 1950-6-3 4823 San Bernardino Rabbit Springs. Mojave desert. 884 Comment
  UCSB42265  Atriplex truncata Roos, J. 1950-6-24 San Bernardino Rabbit Springs, Mojave Desert 883 Comment
  UCR23926  Avena barbata John C. Roos, L. Roos 1950-4-15 4738 Riverside Peninsular Range, Box Springs Mtns., Pigeon Pass 457 Comment
  RSA662431  Avena barbata J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek. San Bernardino Mountains. Comment
  CLARK-A1528-5587  Avena fatua John C. Roos 1943-3-20 2600 Los Angeles Westwood Village Comment
  RSA648013  Azolla filiculoides J. C. Roos 1937-6-11 2012 San Diego Otay Reservation. 152 Comment
Read comments
Jun 6 2016
  CLARK-A1528-5226  Baccharis brachyphylla John C. Roos 1949-9-17 4659 Riverside Whitewater Wash 548 Comment
  RSA45533  Baccharis brachyphylla J. C. Roos 1949-4-2 4133 Riverside Near Palm oasis in the side canyon of Whitewater Canyon. 549 Comment
  RSA48866  Baccharis brachyphylla J. C. Roos, L. Roos 1949-9-17 4659 Riverside Canyon bottom near oasis with Palms, a side canyon, E side Whitewater Wash, W slope Painted Hill, 2.2 miles N of Hwy 99 Comment
  CLARK-A1528-1625  Baccharis emoryi John C. Roos 1937-9-12 Riverside Santa Ana River Comment
  CLARK-A1528-7787  Baccharis salicifolia John C. Roos 1947-3-15 3331 Riverside Dos Palmas Spring Comment
Read comments
Oct 23 2015
  POM266293  Baccharis salicifolia J. C. Roos 1938-4-15 1627 Inyo on stony bank, Darwin Fall. Comment
  CAS-BOT-BC99839  Baccharis sarothroides John Roos; Lucille Roos 1950-8-19 4937 San Diego Hodges Dam S.W. of Escondido 121 Comment
  UCR23675  Baccharis sarothroides John C. Roos 1965-10-10 s.n. San Diego Peninsular Range, 8 miles southeast of Dulzura [along Hwy 94, near Tecate Peak] Comment
  UCSB42282  Baccharis sarothroides Roos, John 1965-9-18 Inyo Wild Rose Canyon, Panamint Mtns. Comment
  CLARK-A1528-1636  Baccharis sergiloides John C. Roos 1941-8-16 68 Inyo Panamint Range Comment
  UCR23385  Batis maritima John C. Roos 1937-8-29 2552 San Diego Mission Bay Comment
  CLARK-A1528-1647  Bebbia juncea John C. Roos 1951-10-19 5329 Riverside San Jacinto Valley 457 Comment
  CLARK-A1528-1649  Bellis perennis John C. Roos 1965-6-21 San Bernardino San Gabriel Mountains Comment
  POM265669  Berberis dictyota J. C. Roos 1940-2-17 890 San Bernardino Reche Canyon, off San Bernardino Valley. Comment
  CAS-BOT-BC75739  Berberis nevinii J. C. Roos 1949-3-6 13121 San Bernardino Branch of San Timoteo Canyon, south of Redlands. 426 Comment
  CLARK-A1528-2270  Berberis nevinii John C. Roos 1955-3-5 6237 Riverside Scott's Canyon 426 Comment
  CLARK-A1528-5130  Berberis nevinii John C. Roos 1950-2-11 4705 San Bernardino 426 Comment
  CLARK-A1528-5634  Berberis nevinii John C. Roos 1948-2-21 3772 Riverside San Timoteo Canyon Comment
  UCR18794  Berberis nevinii John C. Roos 1949-5-21 4321 Riverside Peninsular Range, SW corner of county, 2 miles north of Dripping Springs, near Vail Dam 442 Comment
  RSA0008555  Berberis nevinii J. C. Roos, Lucille Roos 1949-5-21 4321 Riverside Near Vail Dam, 2 miles north of Dripping Springs, southwestern Riverside County. Comment
  CLARK-A1528-2687  Bernardia incana John C. Roos 1946-9-14 3024 Riverside San Jacinto Mountains Comment
  POM251784  Bernardia incana J. C. Roos 1936-4-5 s.n. San Diego San Felipe Valley. Comment
Read comments
Sep 29 2009
  CLARK-A1528-2427  Berula erecta John C. Roos 1937-8-3 664 Inyo Little Lake Comment
  CLARK-A1528-404  Beta vulgaris John C. Roos 1951-10-24 5334 Riverside Riverside 228 Comment
  CLARK-A1528-5452  Bidens frondosa John C. Roos 1951-9-25 5265 Riverside Riverside 259 Comment
  UCR25293  Bidens frondosa John C. Roos 1946-9-20 3054 San Bernardino Mojave Desert, Mojave River near Apple Valley 854 Comment
  CLARK-A1528-1519  Bloomeria crocea John C. Roos 1947-5-11 3606 Los Angeles Pomona Comment
  POM251754  Boerhavia J. C. Roos 1937-8-20 12 Riverside East of Desert Center. Comment
  CLARK-A1528-3265  Boerhavia annulata John C. Roos 1955-4-6 6290 Inyo Inyo Mountains 487 Comment
  RSA158110  Boerhavia annulata J. C. Roos 1955-7-23 6510 Inyo Mouth of Beveridge Canyon, east base Inyo Mts., Saline Valley 610 Comment
  CLARK-A1528-5699  Boerhavia coccinea John C. Roos 1945-5-15 3858 Riverside Eagle Mountains Comment
  CLARK-A1528-5700  Boerhavia coccinea John C. Roos 1945-5-15 3858 Riverside Eagle Mountains Comment
  UCR19106  Boerhavia coccinea John C. Roos 1965-9-5 s.n. Riverside Sonoran (Colorado) Desert, Desert Center Comment
  RSA40563  Boerhavia triquetra J. C. Roos 1946-11-29 3178 Riverside south foot of Eagle Mountains, east of Hayfields Comment
  CLARK-A1528-3273  Boerhavia wrightii John C. Roos 1950-8-4 San Bernardino Clark Mountain Range Comment
  RSA449949  Boerhavia wrightii J. C. Roos 1937-8-20 s.n. Riverside East of Desert Center. Comment
  UCR19111  Boerhavia wrightii John C. Roos 1965-9-5 s.n. Riverside Sonoran (Colorado) Desert, Desert Center Comment
  UCR19697  Bothriochloa barbinodis John C. Roos 1965-6-23 s.n. Riverside Sonoran (Colorado) Desert, Lost Palms Canyon in the Eagle Mtns Comment
  CLARK-A1528-4506  Bouteloua aristidoides John C. Roos 1943-12-19 2764 Riverside Mecca Hills Comment
  POM263174  Bouteloua aristidoides J. C. Roos 1937-8-22 478 Riverside Colorado River, north of Blythe. Comment
  CLARK-A1528-4512  Bouteloua barbata John C. Roos 1946-9-14 3025 Riverside San Jacinto Mountains 1219 Comment
  RSA85159  Bouteloua curtipendula J. C. Roos, A. R. Roos 1950-8-5 4901 San Bernardino North side of Clark Mountains, about 1 mile SW of Coliseum Mine, eastern Mojave Desert. 1646 Comment
  UCR19677  Bouteloua curtipendula John C. Roos 1949-5-28 4364 San Bernardino Eastern Mojave Desert, Clark Mountain 1646 Comment
  CLARK-A1528-4520  Bouteloua eriopoda John C. Roos, Alfred R. Roos 1950-8-4 4890 San Bernardino Clark Mountain 1219 Comment
  CLARK-A1528-4521  Bouteloua eriopoda John C. Roos 1950-9-3 San Bernardino Clark Mountain 1828 Comment
  POM274187  Bouteloua gracilis J. C. Roos 1945-8-29 2770 San Bernardino Bear Valley, San Bernardino Mountains. 2043 Comment
  UCR19700  Bouteloua gracilis John C. Roos 1949-6-18 3553 San Bernardino Eastern Mojave Desert, SE base of Clark Mountain 1829 Comment
  POM265673  Boykinia rotundifolia J. C. Roos 1942-8-15 1753 San Bernardino Hillside south of and below Crestline. Comment
  UCR26179  Boykinia rotundifolia John C. Roos 1948-6-26 3888 San Bernardino San Bernardino Mtns., City Creek, around bridges Comment
  CLARK-A1528-5381  Brandegea bigelovii John C. Roos 1963-10-23 Riverside Comment
  UCR23690  Brickellia arguta John C. Roos 1955-5-13 6337 Inyo Northern Mojave Desert, west base of Last Chance Mountains, east of Eureka Valley sand dunes 1280 Comment
  CAS-BOT-BC106152  Brickellia desertorum John Roos; Lucille Roos 1950-9-20 4993 San Bernardino N.W. base of Blue (Rattlesnake) Mtn. at east end DeBerry Stree, Midway beetween Loma Linda and Highgrove. 381 Comment
  CLARK-A1528-1669  Brickellia desertorum John C. Roos 1950-9-30 4994 Riverside Box Springs Mountains 457 Comment
  CLARK-A1528-5506  Brickellia desertorum John C. Roos 1957-10-19 6658 San Bernardino Loma Linda 438 Comment
  RSA444676  Brickellia desertorum J. C. Roos 1965-9-12 s.n. Riverside Tin Mine Canyon, 3 mi. SW of Corona. 549 Comment
  RSA78377  Brickellia desertorum J. C. Roos 1950-11-25 5026 Riverside N end Perris Blvd, Sunnymead. 610 Comment
  RSA89877  Brickellia desertorum J. C. Roos, L. Roos 1950-9-30 4995 Riverside rocky hills midway between Steele Pk. and Elsinore. (about 3 mi. N of Elsinore) 488 Comment
  UC1010311  Brickellia desertorum John and Lucille Roos 1950-9-30 4993 San Bernardino at the e end of, Midway between Loma Linda and Highgrove DeBerry Street (nw base of Blue (Rattlesnake) Mtn.); Blue (Rattlesnake) Mtn. 381 Comment
  UC1010313  Brickellia desertorum John and Lucille Roos 1950-9-30 4996 Riverside .5 mi se of Citrus Experiment Station (Box Springs Grade); Box Springs Grade 396 Comment
  UCSB42270  Brickellia desertorum Roos, John; Roos, Lucille 1957-10-19 San Bernardino 1 mile S.W. of Loma Linda Hospital 438 Comment
  CLARK-A1528-1674  Brickellia incana John C. Roos 1947-4-18 3452 San Bernardino Cronese Lake Comment
  CLARK-A1528-1677  Brickellia incana John C. Roos 1950-8-4 San Bernardino Clark Mountain Comment
  UC1010228  Brickellia longifolia John and Lucille Roos 1947-9-20 2813 Inyo Emigrant Wash above Emigrant Spring, Panamint Mts. 1249 Comment
  UC1043017  Brickellia longifolia John and Lucille Roos 1954-3-27 6058 Inyo Klare Spring, Titus Canyon, Grapevine Mts. Death valley. 914 Comment
  CAS-BOT-BC100571  Brickellia longifolia var. multiflora John Roos; Lucille Roos 1947-9-18 2792 Inyo Wild Rose Canyon at Wild Rose Station, Panamint Mts. 1066 Comment
  CAS-BOT-BC100578  Brickellia longifolia var. multiflora J. C. Roos; A. R. Roos 1953-8-14 6032 Inyo Mazourka Canyon, Inyo Mts. 1767 Comment
  CAS-BOT-BC127626  Brickellia microphylla var. microphylla J. C. Roos; A. R. Roos 1953-8-14 6029 Inyo Al Rose Canyon, Inyo Mts. 2133 Comment
  UC1010247  Brickellia microphylla var. microphylla J. C. and A. R. Roos 1953-8-14 6029 Inyo Al Rose Canyon 2133 Comment
  RSA34195  Brickellia multiflora J. C. Roos 1947-9-18 2792 Inyo Wildrose Canyon, Panamint Mts. 1067 Comment
  RSA79494  Brickellia multiflora J. C. Roos, A. R. Roos 1953-8-14 6032 Inyo Mazourka Canyon, Inyo Mts. 1768 Comment
  RSA85139  Brickellia multiflora J. C. Roos, L. Roos 1954-3-27 6058 Inyo Titus Canyon below Klare Spring, Grapevine Mts. Death Valley. 914 Comment
  CLARK-A1528-1682  Brickellia multiflora John C. Roos 1954-11-24 6264 Inyo Inyo Mountains 548 Comment
  CLARK-A1528-1100  Brickellia oblongifolia var. linifolia John C. Roos 1953-8-8 5944 Inyo Inyo Mountains 2590 Comment
  RSA450447  Briza maxima J. C. Roos 1957-7-2 6636 Mendocino Point Arena. Comment
  UC1043023  Brodiaea filifolia John C. Roos 1952-5-14 5667 Riverside San Jacinto River bottom 1 mi E of Ferris 426 Comment
  UCR18656  Brodiaea filifolia John C. Roos 1952-5-14 5667 Riverside Perris-Aguanga Basin region, 1 mi east of Perris along the San Jacinto River 427 Comment
  GH361687  Bromus berteroanus J. C. Roos 1955-5-13 6330 Unknown west base Last Chance Mts., east of Eureka Valley sand dunes. 1219 Comment
  CLARK-A1528-4534  Bromus carinatus John C. Roos 1937-5-20 2079 Orange San Juan Capistrano Comment
  POM265763  Bromus carinatus J. C. Roos 1937-5-10 2079 Orange East of San Juan Capistrano. Comment
  UCSB51402  Bromus carinatus Roos, John 1965-7-17 San Bernardino Stetson Creek, Barton Flats, San Bernardino Mtns. Comment
  CAS-BOT-BC148733  Bromus carinatus var. marginatus J. C. Roos 1965-6-26 s.n. San Bernardino Upper Santa Ana Canyon, Heart Bar area. San Bernardino Mtns. Comment
  RSA664197  Bromus diandrus J. C. Roos 1965-6-6 4497 San Bernardino Mill Creek. San Bernardino Mountains. Comment
Read comments
Nov 8 2014
  CLARK-A1528-1275  Bromus japonicus John C. Roos 1943-6-22 2711 San Bernardino San Bernardino County Hospital 304 Comment
  CLARK-A1528-4539  Bromus japonicus John C. Roos 1943-6-22 2711 San Bernardino San Bernardino County Hospital 304 Comment
  RSA648066  Bromus japonicus J. C. Roos 1943-6-22 2711 San Bernardino County Hospital. Comment
  UCSB71632  Bromus madritensis subsp. rubens Roos, J. 1965-6-6 San Bernardino Mill Creek, San Bernardino Mtns, near Fallsvale Comment
  CLARK-A1528-4542  Bromus marginatus John C. Roos 1965-7-18 San Bernardino San Bernardino Mountains Comment
  RSA659620  Bromus marginatus J. C. Roos 1965-6-26 s.n. San Bernardino Upper Santa Anita Canyon, Heart Bar area. San Bernardino Mtns. Comment
  CLARK-A1528-4546  Bromus mollis John C. Roos, Lucille Roos 1950-4-15 4740 Riverside Pigeon Pass 457 Comment
  CAS-BOT-BC161805  Bromus rubens J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek, near Fallsvale, San Bernardino Mountains. Comment
  CLARK-A1528-4553  Bromus rubens John C. Roos 1952-4-2 5465 Riverside Box Springs 426 Comment
  CLARK-A1528-4555  Bromus rubens John C. Roos, Lucille Roos 1950-4-15 4739 Riverside Pigeon Pass 457 Comment
  UCR23875  Bromus rubens John C. Roos, L. Roos 1950-4-15 4739 Riverside Peninsular Range, Box Springs Mtns., Pigeon Pass 457 Comment
  UC1023393  Bromus trinii John and Lucille Roos 1953-3-21 5909 Riverside s of Palm Springs (mouth of Andreas Canyon); Andreas Canyon 274 Comment
  CLARK-A1528-4566  Bromus willdenowii John C. Roos 1950-6-9 4828 San Bernardino San Bernardino Comment
  CAS-BOT-BC233723  Buddleja utahensis John C. Roos 1955-5-13 6335 Inyo West base Last Chance Mts., east of Eureka Valley sand dunes 1219 Comment
  CLARK-A1528-5083  Buddleja utahensis John C. Roos 1949-6-26 4497 San Bernardino Mesquite Mountains 1066 Comment
  UCR23612  Buddleja utahensis John C. Roos 1955-5-13 6335 Inyo Northern Mojave Desert, west base of Last Chance Mtns, east of Eureka Valley sand dunes 1223 Comment
  CLARK-A1528-2778  Calliandra eriophylla John C. Roos 1949-4-7 4164 Imperial Chocolate Mountains Comment
  CLARK-A1528-2363  Callitriche marginata John C. Roos 1952-4-16 5540 Riverside Edgemont Comment
  RSA85454  Callitriche marginata J. C. Roos 1952-4-16 5540 Riverside Edgemont, near Box Springs. 488 Comment
  UCR18880  Callitriche marginata John C. Roos 1952-4-16 5540 Riverside Edgemont, near Box Springs 488 Comment
  UCSB45513  Callitriche palustris Roos, John 1957-7-2 Sonoma Miller's Ridge Comment
  RSA664194  Calocedrus decurrens J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek. San Bernardino Mountains. Comment
  CLARK-A1528-3185  Calochortus albus John C. Roos 1960-5-30 Riverside Santa Ana Mountains Comment
  RSA444479  Calochortus albus J. C. Roos 1960-5-30 s.n. Riverside Ridge between heads of Bedford Canyon and East Fork Ladd Canyon 1220 Comment
Read comments
May 20 2011
  SEINET3885349  Calochortus concolor John Roos, Lucille Roos 1952-6-14 5772 San Bernardino Mill Creek south of Mill Creek Public Camp, San Bernardino Mts.; 0 1158 Comment
  SEINET3885354  Calochortus invenustus J. C. Roos 1965-7-18 s.n. San Bernardino Bear Valley, San Bernardino Mtns.; 0 Comment
  CLARK-A1528-3195  Calochortus nuttallii John C. Roos 1937-7-17 630 San Bernardino San Gabriel Mountains Comment
  UCR27543  Calochortus palmeri John C. Roos, L. Roos 1952-7-12 5809 San Bernardino San Bernardino Mtns., NE shoulder of Strawberry Peak 1829 Comment
  UCR30501  Calochortus plummerae John C. Roos, L. Roos 1952-5-30 5733 Riverside One year old burn on hills of North Moreno between Moreno and Redlands. In branch of San Timoteo Canyon. 503 Comment
  UCR30817  Calochortus striatus John C. Roos 1947-6-21 3694 San Bernardino San Bernardino Mtns, Cushenbury Canyon, alkaline springs [probably Whiskey Springs] on north side of the mountains 1677 Comment
  CLARK-A1528-3816  Calyptridium monandrum John C. Roos 1937-3-3 1302 Riverside La Sierra Comment
  RSA92169  Camissonia boothii subsp. desertorum J. C. Roos, Lucille Roos 1954-6-26 6165 Inyo Inyo Mountains, Mazourka Canyon 2439 Comment
  RSA155652  Camissonia boothii subsp. intermedia J. C. Roos 1955-6-17 6396 Inyo 2 miles north of Willow Spring, Last Chance Mountains. 2012 Comment
  CLARK-A1528-5708  Camissonia brevipes John C. Roos 1966-3-20 Riverside Chuckwalla Mountains Comment
  RSA443546  Camissonia brevipes subsp. brevipes J. C. Roos 1966-3-20 s.n. Riverside 2 miles SE of Desert Center. Comment
  UCR26170  Camissonia campestris John C. Roos 1947-4-19 3488 Inyo Death Valley, Ryan Wash. east of Furnace Creek 701 Comment
  CLARK-A1528-3322  Camissonia cardiophylla John C. Roos 1946-12-7 3181 Riverside Pushawalla Wash Comment
  UCR26171  Camissonia cheiranthifolia Alfred R. Roos 1956-5-22 s.n. Los Angeles South Coast, sand dunes in El Segundo, near Hyperion 9 Comment
  CLARK-A1528-3326  Camissonia claviformis John C. Roos, Lucille Roos 1954-5-9 6109 Inyo Panamint Mountains 1219 Comment
  CLARK-A1528-2646  Camissonia heterochroma John C. Roos, Alfred R. Roos 1954-8-14 6213 Inyo Inyo Mountains 2316 Comment
  NY851462  Camissonia heterochroma J. C. Roos 1954-8-14 6213 Inyo 0.4 mile north of The Narrows, Marble Canyon, Inyo Mountains 2316 Comment
  RSA45544  Camissonia palmeri J. C. Roos, Lucille Roos 1949-4-30 4253 San Bernardino Sandy flats 5 miles west of Lucerne Valley, Mojave Desert. Comment
  CLARK-A1528-3335  Camissonia refracta John C. Roos 1937-4-28 789 San Bernardino Needles Comment
  CLARK-A1528-3360  Camissonia strigulosa John C. Roos 1949-4-18 4287 San Bernardino Loma Linda 304 Comment
  CLARK-A1528-3361  Camissonia strigulosa John C. Roos 1965-6-13 Riverside San Jacinto Mountains Comment
  RSA85085  Camissonia strigulosa J. C. Roos 1952-4-16 5554 Riverside Reche Canyon. 457 Comment
  UCR23552  Capsella bursa-pastoris John C. Roos 1966-3-24 s.n. Riverside Hemet, in a vacant lot Comment
  CLARK-A1528-7863  Capsella procumbens John C. Roos, Lucille Roos 1950-4-26 4763 San Bernardino Lucerne Valley 883 Comment
  UCR25784  Cardaria draba John C. Roos 1949-4-2 4135 Riverside Fisherman's Retreat, San Timoteo Canyon Comment
  RSA48687  Carex subfusca J. C. Roos 1949-8-13 4606 San Bernardino Copper Queen Mine, Keystone Canyon, New York Mountains 1829 Comment
  POM262909  Castanopsis sempervirens J. C. Roos 1936-7-30 696 San Bernardino High Creek, San Bernardino Mts. 2591 Comment
  UCSB45593  Castilleja ambigua Roos, John 1957-7-2 Mendocino Point Arena Lighthouse 2024 Comment
  CLARK-A1528-1227  Castilleja cinerea John C. Roos 1943-7-4 2716 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4175  Castilleja cinerea John C. Roos 1938-8-14 581 San Bernardino San Bernardino Mountains Comment
  POM302525  Castilleja cinerea J. C. Roos 1943-7-4 2717 San Bernardino Sugarloaf Peak, San Bernardino Mountains. 2988 Comment
  UCR26178  Castilleja plagiotoma John C. Roos 1937-5-1 2047 San Bernardino San Gabriel Mtns., Swarthout Valley Comment
  CAS-BOT-BC38171  Caulanthus amplexicaulis J. C. Roos 1947-6-21 3690 San Bernardino San Bernardino Mountains. Roadside near Big Bear Lake. 1889 Comment
  CLARK-A1528-2303  Caulanthus amplexicaulis John C. Roos 1947-3-8 3314 San Bernardino San Bernardino Mountains Comment
  UCR23634  Caulanthus crassicaulis var. glaber John C. Roos 1949-6-21 4434 San Bernardino Eastern Mojave Desert, New York Mtns, Keystone Canyon. 1768 Comment
  UCR23633  Caulanthus glaucus John C. Roos 1955-5-16 6384 Inyo Inyo Mountains, narrow canyon 1.5 mi SW of Loretto Mine along Loretto Rd. 1677 Comment
  POM262964  Ceanothus cuneatus J. C. Roos 1941-4-26 141 San Bernardino Colton sand hills. Comment
  CLARK-A1528-3889  Ceanothus greggii John C. Roos 1946-10-5 3118 San Bernardino San Bernardino Mountains Comment
  RSA47547  Ceanothus greggii var. vestitus J. C. Roos, Lucille Roos 1949-6-20 4421 San Bernardino Keystone Canyon, New York Mts 1829 Comment
  UCR23451  Ceanothus oliganthus John C. Roos 1942-3-21 1097 Los Angeles San Gabriel Mtns, Santa Anita Canyon 244 Comment
  CLARK-A1528-3897  Ceanothus oliganthus John C. Roos 1942-3-7 1106 Los Angeles La Canada Comment
  CLARK-A1528-3899  Ceanothus papillosus subsp. roweanus John C. Roos 1960-5-30 Orange Santa Ana Mountains 1066 Comment
  UCR23542  Ceanothus spinosus John C. Roos 1942-3-14 997 Los Angeles Western Transverse Range; Santa Monica Mtns., Sepulveda Canyon, West Los Angeles 350 Comment
  LA102309  Ceanothus tomentosus John C. Roos; 1950-5-6 4785 Riverside Santa Ana Mountains, at the head of Hagador Canyon, S of Corona Comment
  RSA86876  Celtis reticulata J. C. Roos 1950-9-2 4964 San Bernardino East slope Clark Mts., about 1.5 S. E of Coliseum Mine, eastern Mohave Desert. 1524 Comment
  UCR24442  Celtis reticulata John C. Roos 1962-8-4 s.n. San Bernardino San Bernardino Valley, 0.3 mi west of the intersection of Bryant Street and Oak Glen Road. In Wilson Creek Wash 823 Comment
  UCR25407  Cenchrus echinatus John C. Roos 1949-4-7 4173 Imperial Sonoran (Colorado) Desert, Lower Colorado River Valley, near Winterhaven 40 Comment
  UCR25296  Centaurea calcitrapa John C. Roos 1957-6-28 6616 Napa Napa Comment
  RSA89962  Centaurea repens J. C. Roos 1950-10-27 5019 San Bernardino San Bernardino, corner of 9th Street and Waterman Avenue. Comment
  CLARK-A1528-1692  Centaurea repens John C. Roos 1937-6-30 2474 Ventura Oxnard Comment
  CLARK-A1528-5429  Centaurium calycosum John C. Roos 1965-7-11 Inyo Tecopa Comment
  RSA450238  Centaurium exaltatum J. C. Roos 1965-7-11 s.n. Inyo Tecopa Comment
  RSA85280  Centaurium exaltatum J. C. Roos, A. R. Roos 1950-8-7 4927 Inyo Tecopa, eastern Mohave desert. Comment
  CLARK-A1528-5430  Centaurium venustum John C. Roos 1937-6-14 927 San Diego Lemon Grove Comment
  CAS-BOT-BC179760  Centrostegia thurberi J. C. Roos 1955-6-18 6422 Inyo 2 mi NE of Willow Spring, Last Chance Mts. 2011 Comment
  UC1234876  Centrostegia thurberi var. thurberi J. C. Roos, M. D. 1955-6-18 6422 Inyo 2 mi ne of Willow Spring (Last Chance Mountains); Last Chance Mountains 2011 Comment
  RSA92605  Cerastium fontanum J. C. Roos 1952-5-12 5658 San Bernardino Loma Linda 320 Comment
Read comments
Jan 24 2010
  RSA85475  Cerastium glomeratum J. C. Roos 1952-4-16 5556 Riverside Pigeon Pass, Box Springs Mountains 457 Comment
Read comments
May 21 2011
  CLARK-A1528-3976  Cercocarpus betuloides John C. Roos 1942-3-7 1104 Los Angeles San Gabriel Mountains Comment
  CLARK-A1528-4008  Cercocarpus intricatus John C. Roos 1948-9-18 4067 San Bernardino Clark Mountain Range 1706 Comment
  RSA155730  Cercocarpus intricatus J. C. Roos 1955-6-19 6452 Inyo Summit ridge of Last Chance Mountains 2 miles west of Last Chance Spring. 2561 Comment
  RSA450098  Cercocarpus ledifolius J. C. Roos 1965-6-6 s.n. San Bernardino San Bernardino Mtns, Mill Creek near Fallsvale. Comment
  UCR30552  Cercocarpus ledifolius John C. Roos 1937-7-15 2425 San Bernardino San Gabriel Mtns., Stockton Flats, head of Lytle Creek Canyon Comment
  CAS-BOT-BC136948  Cercocarpus ledifolius var. intricatus J. C. Roos; A. R. Roos 1953-8-10 5975 Inyo Mazourka Canyon, Inyo Mts. 2468 Comment
  CAS-BOT-BC148490  Cercocarpus ledifolius var. ledifolius J. C. Roos; A. R. Roos 1953-8-13 6009 Inyo Tamarack Canyon, Inyo Mts. 2743 Comment
  CAS-BOT-BC148491  Cercocarpus ledifolius var. ledifolius J. C. Roos 1955-7-21 6479 Inyo Crest of Last Chance Mountains, 2.5 miles south of Willow Spring 2377 Comment
  CLARK-A1528-5000  Chaenactis artemisiifolia John C. Roos 1937-5-10 2070 Riverside Comment
Read comments
Jun 24 2014
  CLARK-A1528-1756  Chaenactis carphoclinia John C. Roos 1947-4-19 3498 Inyo Death Valley Comment
  UCR26084  Chaenactis carphoclinia var. carphoclinia John C. Roos 1947-4-19 3498 Inyo Northern Mojave Desert, Golden Canyon, Death Valley 76 Comment
  CAS-BOT-BC276596  Chaenactis douglasii var. douglasii John Roos; Lucille Roos 1947-7-12 2897 Inyo Mahogany Flats, Panamint Mountains 2407 Comment
  CLARK-A1528-1696  Chaenactis fremontii John C. Roos 1937-4-18 2461 Riverside Comment
  RSA85499  Chaenactis glabriuscula var. lanosa J. C. Roos 1952-4-22 5569 San Bernardino 1 mile west of Colton along highway 99. 305 Comment
  UCR23738  Chaenactis santolinoides John C. Roos 1947-5-31 3667 Los Angeles San Gabriel Mountains, Big Pines 2134 Comment
  RSA155682  Chaenactis stevioides var. stevioides J. C. Roos 1955-6-20 6461 Inyo Last Chance Mtns near Willow Spring. 1768 Comment
  UC1234872  Chaenactis xantiana J. C. Roos 1955-6-17 6418 Inyo 2 mi ne of Willow Spring; Last Chance Mountains 2011 Comment
  CAS-BOT-BC106010  Chaetadelpha wheeleri J. C. Roos; A. R. Roos 1954-8-13 6208 Inyo Southeast end Eureka Valley 944 Comment
  CAS-BOT-BC106011  Chaetadelpha wheeleri John C. Roos 1955-5-13 6357 Inyo Southeast end Eureka Valley 975 Comment
  UC1236242  Chaetadelpha wheeleri John C. Roos 1955-5-13 6364 Inyo West side Eureka Valley at the mouth of Marble Canyon. 1036 Comment
  CAS-BOT-BC141751  Chamaebatiaria millefolium John Roos; Lucille Roos 1951-8-12 5188 Inyo 1 1/2 miles south of Reed Flat, White Mts. 2895 Comment
  RSA79643  Chamaebatiaria millefolium J. C. Roos, A. R. Roos 1953-8-10 5981 Inyo Inyo Mountains, Mazourka Canyon. 2500 Comment
  UCR18926  Chamaebatiaria millefolium John C. Roos 1965-8-9 s.n. Inyo Sierra Nevada Mountains, east slope of mountains, Independence Creek [near Onion Valley] 2683 Comment
  RSA44246  Chamaesaracha coronopus J. C. Roos 1949-6-22 3548 San Bernardino Barnwell, New York Mountains. Comment
  UCR26198  Chamaesaracha coronopus John C. Roos 1949-6-22 3548 San Bernardino Eastern Mojave Desert, Barnwell, New York Mtns Comment
  RSA659661  Chamaesyce albomarginata J. C. Roos 1951-9-25 5269 Riverside Fairmount 259 Comment
  POM263146  Chamaesyce micromera J. C. Roos 1936-4-22 608 Riverside 20 mi west of Blythe Comment
  POM263138  Chamaesyce parishii J. C. Roos 1937-6-10 627 Imperial Plaster City Comment
  RSA52780  Chamaesyce revoluta J. C. Roos 1950-8-4 4891 San Bernardino North side of Clark Mtn. 1220 Comment
  POM263148  Chamaesyce setiloba J. C. Roos 1937-8-22 626 San Bernardino Rice. Between San Bernardino & Riverside Cos. Comment
  RSA444791  Chamaesyce setiloba J. C. Roos 1958-9-28 s.n. Riverside Pinyon Flats, Santa Rosa Mtns. 1220 Comment
Read comments
Apr 3 2011
  RSA92580  Cheilanthes clevelandii J. C. Roos, Lucille Roos 1954-4-10 6062 San Diego San Pasqual 152 Comment
  RSA44884  Cheilanthes gracillima J. C. Roos 1948-9-1 3947 Siskiyou tufted in rocks, on high ridge, summit of pass, southwest of Etna Comment
  CLARK-A1528-2555  Chenopodium album John C. Roos 1951-9-25 5295 Riverside Riverside 259 Comment
  UCR24551  Chenopodium album John C. Roos 1965-7-4 s.n. San Bernardino San Bernardino Valley, Loma Linda 306 Comment
Read comments
Jan 16 2015
  RSA423415  Chenopodium ambrosioides A. R. Roos 1922-10-23 s.n. San Bernardino Loma Linda. Comment
  POM265708  Chenopodium botrys J. C. Roos 1937-8-9 2523 Inyo Olancha. Comment
  CLARK-A1528-2562  Chenopodium fremontii John C. Roos 1937-7-21 2363 San Bernardino San Bernardino Mountains 1950 Comment
  POM263168  Chenopodium fremontii J. C. Roos 1936-8-15 568 San Bernardino Barton Flats. Comment
  UCR19732  Chenopodium pumilio John C. Roos, L. Roos 1952-11-1 5906 San Bernardino San Bernardino Valley, Loma Linda 335 Comment
  CLARK-A1528-2572  Chenopodium pumilio John C. Roos 1952-11-1 5906 San Bernardino San Bernardino Valley 335 Comment
  CLARK-A1528-4850  Chenopodium pumilio John C. Roos 1948-6-26 3891 San Bernardino City Creek Comment
  CLARK-A1528-5413  Chenopodium pumilio John C. Roos 1952-11-1 5906 San Bernardino San Bernardino Valley 335 Comment
  RSA78226  Chenopodium pumilio J. C. Roos, L. Roos 1952-11-1 5906 San Bernardino Loma Linda, San Bernardino Valley. Comment
  CLARK-A1528-1256  Chloris gayana John C. Roos, Alfred R. Roos 1950-9-16 4987 Los Angeles Los Angeles 60 Comment
  CLARK-A1528-4572  Chloris gayana John C. Roos 1965-9-16 Riverside San Jacinto Comment
  RSA0036251  Chloris gayana J. C. Roos 1965-10-10 s.n. San Diego Roadside of Hwy 395, 0.1 miles south of the San Diego/Riverside county line. Comment
  UCSB37355  Chloropyron tecopense Roos, John; Roos, A. 1950-8-7 Inyo Tecopa Hot Springs 426 Comment
  UCSB37374  Chloropyron tecopense Roos, John; Roos, Lucille 1953-10-31 Inyo Amargosa River 3 miles south of Shoshone 441 Comment
  UCR24252  Chorizanthe membranacea John C. Roos 1939-5-6 294 Napa North Coast Range, Pacific Union College, Bell's Canyon near Three Peaks 862 Comment
  CLARK-A1528-3604  Chorizanthe rigida John C. Roos 1965-6-16 San Bernardino Comment
  CLARK-A1528-3607  Chorizanthe staticoides John C. Roos 1937-5-21 1804 Orange Lemon Heights Comment
  CLARK-A1528-3729  Chorizanthe thurberi John C. Roos 1943-5-23 2678 Riverside Comment
  UCR23731  Chrysanthemum coronarium John C. Roos 1956-5-5 6578 San Diego [San Diego] Ward Rd & Mission Valley Freeway [I-8], along the roadside Comment
  CLARK-A1528-1763  Chrysanthemum coronarium Alfred R. Roos 1955-5-7 Los Angeles El Segundo Comment
  UCR23730  Chrysanthemum leucanthemum John C. Roos 1966-6-26 s.n. San Bernardino San Bernardino Valley, private residence in City of Loma Linda 305 Comment
  CLARK-A1528-1703  Chrysothamnus albidus John C. Roos, Lucille Roos 1954-11-23 6259 Inyo Saline Valley 426 Comment
  CLARK-A1528-1724  Chrysothamnus nauseosus John C. Roos 1950-10-11 5001 San Bernardino Cajon Pass 914 Comment
  RSA45497  Chrysothamnus nauseosus subsp. albicaulis J. C. Roos 1948-9-7 3996 Mono West of Leevining 2591 Comment
  CLARK-A1528-1713  Chrysothamnus nauseosus subsp. bernardinus John C. Roos 1941-10-4 863 Los Angeles San Gabriel Mountains Comment
  RSA89974  Chrysothamnus nauseosus subsp. consimilis J. C. Roos 1950-10-11 5001 San Bernardino Cajon Pass at Cajon 915 Comment
  POM274217  Chrysothamnus nauseosus subsp. mohavensis J. C. Roos 1947-9-20 2808 Inyo Wildrose Canyon at Kilns, Panamint Mts, Pinyon Pine Comment
  CLARK-A1528-1715  Chrysothamnus nauseosus subsp. mohavensis John C. Roos, Lucille Roos 1947-9-20 2808 Inyo Panamint Mountains 2133 Comment
  CLARK-A1528-1727  Chrysothamnus nauseosus subsp. speciosus John C. Roos 1950-9-3 4972 (=4407) San Bernardino Clark Mountain 1889 Comment
  CLARK-A1528-1731  Chrysothamnus paniculatus John C. Roos 1965-11-6 Riverside Whitewater 304 Comment
  CAS-BOT-BC100737  Chrysothamnus viscidiflorus subsp. puberulus J. C. Roos; A. R. Roos 1953-8-8 5934 Inyo on hill behind Blue Bell Mine, Badger Flat, Inyo Mts. 2743 Comment
  CLARK-A1528-5465  Chrysothamnus viscidiflorus subsp. puberulus John C. Roos 1954-8-14 6218 Inyo Inyo Mountains 2377 Comment
  CLARK-A1528-1743  Chrysothamnus viscidiflorus subsp. stenophyllus John C. Roos 1956-9-21 6600 San Bernardino San Bernardino Mountains Comment
  CAS-BOT-BC105974  Chrysothamnus viscidiflorus subsp. viscidiflorus John Roos; Lucille Roos 1951-8-8 5113 Inyo southeast rim Reed Flat, White Mts. 3078 Comment
  POM261400  Chrysothamnus viscidiflorus subsp. viscidiflorus J. C. Roos 1941-8-17 55 Inyo Telescope Peak, Panamint Mts 3366 Comment
  RSA79505  Chrysothamnus viscidiflorus subsp. viscidiflorus J. C. Roos 1953-8-13 6020 Inyo top of ridge, crest of Inyo Mts, 3 miles E of Badger Flat. 3338 Comment
  RSA155661  Chrysothamnus viscidiflorus var. puberulus J. C. Roos 1955-8-24 6542 Inyo 1mile NE of Willow Spring 1860 Comment
  RSA71784  Chrysothamnus viscidiflorus var. puberulus J. C. Roos 1951-8-8 5090 Inyo 3 miles NW of Cedar Flat, White Mountains 2591 Comment
  UCR23333  Cirsium arizonicum var. tenuisectum John C. Roos 1949-8-13 4615 San Bernardino Eastern Mojave Desert, Keystone Canyon, New York Mtns. 1768 Comment
  CLARK-A1528-1775  Cirsium nidulum John C. Roos 1949-8-13 4615 San Bernardino New York Mountains 1706 Comment
  RSA85521  Cirsium occidentale var. californicum J. C. Roos 1952-4-27 5586 Riverside San Timoteo Canyon south of Redlands. 427 Comment
  CAS-BOT-BC285738  Cirsium vulgare J. C. Roos 1955-8-8 6525 San Bernardino Loma Linda 320 Comment
  RSA0113026  Cirsium vulgare J. C. Roos 1955-8-8 6525 San Bernardino Loma Linda 320 Comment
  UCR18875  Clarkia heterandra John C. Roos 1947-6-14 3678 San Bernardino San Bernardino Mtns, near Crestline, behind the Crestline Bowl 1433 Comment
  CAS-BOT-BC172566  Clarkia purpurea subsp. purpurea J. C. Roos 1965-6-12 s.n. San Bernardino Igo's near Mountain Home Village in Mill Creek Canyon, San Bernardino Mtns. Comment
  CLARK-A1528-3368  Clarkia purpurea subsp. quadrivulnera John C. Roos 1937-6-11 1757 San Diego Campo Comment
  CAS-BOT-BC164940  Clarkia rhomboidea J. C. Roos 1965-6-12 s.n. San Bernardino Igo's near Mountain Home Village and Mill Creek, San Bernardino Mtns. Comment
  RSA0034569  Clarkia rhomboidea J. C. Roos 1965-6-12 s.n. San Bernardino Igo's near Mountain Home Village and Mill Creek. San Bernardino Mountains. [Note: Igo s is present location of Mountain Home Village, Hwy. 38, San Bernardino Mtns. -SDW 2006] Comment
  CLARK-A1528-5356  Clarkia unguiculata John C. Roos, Lucille Roos 1952-4-28 5587 Riverside Riverside 259 Comment
  RSA659472  Clarkia unguiculata J. C. Roos 1947-5-17 3626 Los Angeles Placerita Canyon east of Newhall. Comment
  UCR23455  Clematis lasiantha John C. Roos 1952-6-21 5784 San Bernardino San Bernardino Mtns., Mill Creek 915 Comment
  POM302504  Clematis ligusticifolia J. C. Roos 1943-8-8 2700 Riverside Hall Canyon. Comment
  UCR23484  Clematis ligusticifolia John C. Roos 1966-8-6 s.n. San Bernardino San Bernardino Mtns,, Cienaga Seca Creek, Heart Bar Ranch Comment
  UCR23255  Clematis pauciflora John C. Roos 1952-6-8 5738 San Bernardino San Bernardino Valley, San Timoteo Canyon south of Redlands 457 Comment
  CLARK-A1528-2390  Cleome lutea John C. Roos 1937-8-6 1959 Inyo Big Pine Comment
  UCR23656  Cleome sparsifolia John C. Roos 1965-9-18 s.n. Inyo Keeler, on the NE shore of Owens Lake 1097 Comment
  POM265657  Cleome sparsifolia J. C. Roos 1937-8-4 1953 Inyo east side of Owens Lake. Comment
  CLARK-A1528-1168  Cleomella brevipes John C. Roos, R. Weatherby 1949-9-3 3565 Inyo Tecopa Hot Springs 426 Comment
  CLARK-A1528-2380  Cleomella brevipes John C. Roos, Alfred R. Roos 1954-8-15 6225 Inyo Saline Valley 426 Comment
  CLARK-A1528-2381  Cleomella brevipes John C. Roos 1954-9-14 6233 Inyo Amargosa Desert Comment
  RSA592493  Cleomella obtusifolia J. C. Roos 1965-7-11 s.n. Inyo Death Valley Junction. Comment
  UCR23681  Cleomella obtusifolia John C. Roos 1946-9-21 3065 San Bernardino Mojave Desert, Rabbit Springs, Lucerne Valley 887 Comment
  UCR18957  Cleomella parviflora John C. Roos 1949-4-30 4281 San Bernardino Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  CLARK-A1528-5175  Cneoridium dumosum John C. Roos, Lucille Roos 1954-4-10 6061 San Diego San Pasqual 152 Comment
  CLARK-A1528-5637  Coldenia canescens John C. Roos 1948-5-15 3859 Riverside Eagle Mountains Comment
  UCR25395  Coleogyne ramosissima John C. Roos 1937-4-23 784 San Bernardino Mojave Desert, 20 mi. west of Twentynine Palms (near Yucca Valley) 915 Comment
  CLARK-A1528-4188  Collinsia childii John C. Roos 1947-6-14 3679 San Bernardino San Bernardino Mountains 1523 Comment
  RSA44925  Collinsia childii J. C. Roos 1947-6-14 3679 San Bernardino in canyon behind Bowl, Crestline. 1524 Comment
  RSA450061  Collinsia childii J. C. Roos, Lucille Roos 1953-6-18 5922 San Bernardino Cedarpines Park. 1524 Comment
  CLARK-A1528-4191  Collinsia heterophylla John C. Roos 1965-6-12 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4190  Collinsia heterophylla var. austromontana John C. Roos 1948-6-13 3876 San Bernardino Lytle Creek Comment
  CLARK-A1528-3460  Collomia grandiflora John C. Roos 1937-6-14 2393 San Diego Cuyamaca Lake Comment
  CLARK-A1528-3461  Collomia heterophylla John C. Roos 1939-4-26 260 Napa Angwin Comment
  CLARK-A1528-5722  Colubrina californica John C. Roos 1946-10-26 3138 Riverside Chuckwalla Mountains Comment
  RSA45543  Colubrina californica J. C. Roos 1949-4-10 4231 Riverside 3.5 mi. SE of Desert Center, Chuckwalla Mountains. 610 Comment
  UCSB72193  Comastoma tenellum Roos, John 1959-8-23 Mono Cottonwood Creek 2895 Comment
  CLARK-A1528-5616  Conyza bonariensis John C. Roos 1965-5-22 San Bernardino Loma Linda Comment
  POM266291  Conyza canadensis J. C. Roos 1942-9-26 1712 Los Angeles Westwood Village, Los Angeles. Comment
  CLARK-A1528-1780  Conyza coulteri John C. Roos 1965-10-10 San Diego Otay Lake Comment
  CAS-BOT-BC237936  Cordylanthus eremicus subsp. eremicus J. C. Roos 1955-7-24 6522 Inyo Nelson Range near head of Grapevine Canyon 1889 Comment
  SD52918  Cordylanthus eremicus subsp. eremicus J. C. Roos 1955-7-24 6522 Inyo Nelson Range near head of Grapevine Canyon 1890 Comment
  UCR19042  Cordylanthus eremicus subsp. eremicus John C. Roos 1941-8-17 76 Inyo Northern Mojave Desert, Panamint Mtns., Death Valley National Monument. Wildrose Canyon at the Charcoal Kilns Comment
  CLARK-A1528-4198  Cordylanthus helleri John C. Roos 1958-8-30 Inyo Inyo Mountains Comment
  UC1234837  Cordylanthus kingii subsp. helleri J. C. and A. R. Roos 1955-8-25 6548 Inyo e base Waucoba Mt.; Inyo Mts., Soldier Flat 2164 Comment
  RSA155714  Cordylanthus kingii subsp. helleri J. C. Roos, A. R. Roos 1955-8-24 6536 Inyo Last Chance Mts. 1 mile south of Willoq Spring. Comment
  CLARK-A1528-4200  Cordylanthus nevinii John C. Roos 1965-9-11 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-7772  Cordylanthus parviflorus John C. Roos 1937-8-25 1 San Bernardino New York Mountains Comment
  CLARK-A1528-5735  Cordylanthus ramosus subsp. eremicus John C. Roos 1941-8-17 76 Inyo Panamint Mountains Comment
  CAS-BOT-BC238198  Cordylanthus tecopensis John Roos; Lucille Roos 1954-9-14 6231 Inyo Flats along Amargosa River bottom 3 miles south of Shoshone 432 Comment
  CAS-BOT-BC238200  Cordylanthus tecopensis John Roos; Lucille Roos 1953-10-31 6033 Inyo Open flats along Amargosa River 3 miles south Shoshone 441 Comment
  CLARK-A1528-4201  Cordylanthus tecopensis John C. Roos, Lucille Roos 1954-9-14 6231 Inyo Shoshone 432 Comment
  CLARK-A1528-4208  Cordylanthus tecopensis John C. Roos, Lucille Roos 1954-9-15 6243 Inyo Tecopa Hot Springs 426 Comment
  CLARK-A1528-5156  Cordylanthus tecopensis John C. Roos, Lucille Roos 1954-9-14 6231 Inyo Shoshone 432 Comment
  CLARK-A1528-5173  Cordylanthus tecopensis John C. Roos, Lucille Roos 1954-9-15 6243 Inyo 426 Comment
  RSA61539  Cordylanthus tecopensis J. C. Roos 1950-8-7 4929 Inyo Tecopa Hot Springs 427 Comment
  RSA85141  Cordylanthus tecopensis J. C. Roos 1953-11-1 6035 Inyo Amargosa desert, 3 miles NE of Death Valley Junction, on Ash Meadows Rd. 625 Comment
  UC1043014  Cordylanthus tecopensis John and Lucille Roos 1953-10-31 6033 Inyo 3 mi s Shoshone (along Amargosa River); Amargosa River 441 Comment
  UCR19037  Cordylanthus tecopensis John C. Roos, R. J. Weatherby 1949-9-3 3569 Inyo Northeastern Mojave Desert, Drying alkaline meadows below Tecopa Hot Spring 427 Comment
  UCR34455  Coreopsis bigelovii John C. Roos 1937-3-25 2482 Los Angeles Western Mojave Desert, between Lancaster & Ridge Route, west of Lancaster Comment
  CLARK-A1528-1788  Corethrogyne filaginifolia John C. Roos 1965-8-19 Riverside Beaumont Comment
  CLARK-A1528-1781  Corethrogyne filaginifolia var. glomerata John C. Roos 1937-7-25 2471 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-1790  Corethrogyne filaginifolia var. virgata John C. Roos 1937-9-1 2519 Orange Laguna Beach Comment
  UC1080636  Corispermum americanum var. americanum John C. Roos 1955-5-13 6361 Inyo sand dunes at mouth of Marble Canyon, W side Eureka Valley 1036 Comment
  UCR27546  Cornus sericea subsp. sericea John C. Roos 1963-1 s.n. San Bernardino San Bernardino Mtns., Green Canyon 2530 Comment
  UCR19726  Coronopus didymus John C. Roos 1953-4-16 5913 San Bernardino San Bernardino Valley, Loma Linda 320 Comment
  CLARK-A1528-1015  Coronopus didymus John C. Roos 1947-6-9 3651 San Bernardino San Bernardino 320 Comment
  CLARK-A1528-1791  Cotula australis John C. Roos 1942-2-28 1004 Los Angeles Pomona Comment
  CLARK-A1528-3989  Cowania mexicana var. stansburyana John C. Roos 1941-8-17 71 Inyo Panamint Mountains Comment
  CLARK-A1528-5403  Crassula erecta John C. Roos 1947-2-20 3275 San Bernardino Loma Linda Hills Comment
  UCR26083  Crepis acuminata John C. Roos 1949-7-16 4551 San Bernardino San Bernardino Mtns., Moonridge Ski Area, Bear Valley 2256 Comment
  CAS-BOT-BC291540  Crepis intermedia J. C. Roos 1955-6-17 6401 Inyo 2 miles NE of Willow Spring, Last Chance Mountains 2011 Comment
  RSA71745  Crepis intermedia J. C. Roos 1952-7-27 5832 Inyo Southeast rim Reed Flat, White Mountains. 3140 Comment
  UC1010222  Crepis nana John and Lucille Roos 1947-7-13 2895 Inyo Telescope Peak Panamint Mts. (w face) 3352 Comment
  CLARK-A1528-2612  Cressa truxillensis John C. Roos 1952-5-21 5703 Riverside San Jacinto River Comment
  UCR18878  Cressa truxillensis John C. Roos 1952-5-21 5703 Riverside Perris-Aguanga Basin region, San Jacinto River bottomland 1.5 mi. SE of Perris. 427 Comment
  RSA92578  Cressa truxillensis J. C. Roos 1952-5-21 5703 Riverside San Jacinto River bottomland 1.5 miles southeast of Perris 426 Comment
  CLARK-A1528-2620  Crossosoma bigelovii John C. Roos 1967-3-25 Riverside Whitewater Canyon Comment
  RSA450063  Croton californicus J. C. Roos 1965-6-27 s.n San Bernardino Loma Linda Hills. 305 Comment
  RSA480587  Croton californicus A. R. Roos 1922-11-8 s.n. San Bernardino Near Loma Linda 915 Comment
  UCSB45965  Croton californicus Roos, John 1965-6-27 San Bernardino Loma Linda Hills 304 Comment
  UCR24005  Crypsis schoenoides John C. Roos 1969-11-22 s.n. Riverside San Jacinto Valley, east of Moreno. Quail Lake at the S end of Jack Rabbit Trail. 427 Comment
  CAS-BOT-BC190129  Crypsis vaginiflora John C. Roos 1952-6-4 5735 Riverside San Jacinto river bottomland 1.5 mile southeast of Perris. 426 Comment
  CLARK-A1528-2210  Cryptantha angustifolia John C. Roos 1947-2-14 3254 Riverside Eagle Mountains Comment
  CLARK-A1528-5391  Cryptantha angustifolia John C. Roos 1947-2-14 3254 Riverside Eagle Mountains Comment
  CLARK-A1528-2211  Cryptantha barbigera John C. Roos 1937-4-18 San Diego In Comment
  POM301602  Cryptantha cinerea var. abortiva J. C. Roos 1937-7-31 1839 San Bernardino Pine flats E of mouth of Lost Creek, San Bernardino Mts 1982 Comment
  UCR31667  Cryptantha gracilis John C. Roos 1949-6-19 4397 San Bernardino Eastern Mojave Desert, SE base of Clark Mountain 1921 Comment
  RSA450444  Cryptantha intermedia J. C. Roos 1950-4-22 4746 Riverside Pigeon Pass Comment
  CLARK-A1528-2218  Cryptantha jamesii John C. Roos 1947-6-21 3687 San Bernardino San Bernardino Mountains Comment
  UCR25965  Cryptantha jamesii var. abortiva John C. Roos 1937-7-21 1839 San Bernardino San Bernardino Mtns, east of Lost Creek 1982 Comment
  CLARK-A1528-2222  Cryptantha micrantha subsp. lepida John C. Roos 1947-5-24 3648 Riverside San Jacinto Mountains Comment
  RSA0038354  Cryptantha micrantha var. lepida J. C. Roos 1965-7-18 S.N. San Bernardino Bear Valley, San Bernardino Mtns. Comment
  UCSB46749  Cryptantha muricata Roos, John 1950-4-15 Riverside Summit of Reche Canyon 792 Comment
  RSA0034450  Cryptantha muricata var. jonesii J. C. Roos 1950-4-15 4732 Riverside The summit of Reche Canyon. 793 Comment
  CLARK-A1528-2233  Cryptantha racemosa John C. Roos 1948-4-15 503 Inyo Darwin Falls Comment
  UCR25968  Cryptantha racemosa John C. Roos 1948-5-1 3815 Riverside Western Colorado Desert/ San Bernardino Mtns., Whitewater, N slope on a mountainside 549 Comment
  UCR25961  Cryptantha utahensis John C. Roos 1947-4-18 3474 Inyo Northern Mojave Desert, Death Valley National Monument [Park], Black Mtns., Dante's View 1646 Comment
  CLARK-A1528-3574  Cryptogramma crispa subsp. acrostichoides John C. Roos 1946-9-15 3040 San Bernardino San Bernardino Mountains 3002 Comment
  CAS-BOT-BC130884  Cuniculotinus gramineus J. C. Roos; A. R. Roos 1953-8-8 5935 Inyo On hill behind Blue Bell Mine, Badger Flat, Inyo Mts. 2895 Comment
  UCR23689  Cuscuta indecora John C. Roos 1946-10-5 3109 San Bernardino San Bernardino Mtns./Southern Mojave Desert, The Pipes, a desert slope on the E side of the mountains, north of Yucca Valley. At mouth of canyon 1357 Comment
  CLARK-A1528-4879  Cuscuta indecora John C. Roos 1937-8-27 645 San Bernardino San Bernardino Comment
  UCR23688  Cuscuta indecora var. neuropetala John C. Roos, A. R. Roos 1955-8-28 6563 Inyo Owens Valley, West side of Owens Lake, 3 miles North of Olancha 1091 Comment
  POM265706  Cycloloma atriplicifolium J. C. Roos 1937-6-16 1230 San Diego San Pasqual Valley. Comment
  UCR24269  Cycloloma atriplicifolium John C. Roos 1965-9-26 s.n. Riverside Sonoran (Colorado) Desert, Indio Comment
  CLARK-A1528-2576  Cycloloma atriplicifolium John C. Roos 1941-9-4 San Bernardino Bloomington Comment
  SBBG54103  Cyclospermum leptophyllum J. C. Roos, L. Roos 1953-5-9 5917 Riverside Fairmount Park, Riverside 259 Comment
  UCR25127  Cyclospermum leptophyllum John C. Roos 1951-8-1 5079 Los Angeles Los Angeles, [near Westwood Village] Overland Ave. near Santa Monica Blvd. 61 Comment
  RSA662064  Cyclospermum leptophyllum A. R. Roos 1958-3-29 s.n. Los Angeles A parking strip on the 1900 block of Westwood Blvd. Comment
  RSA85145  Cymopterus aboriginum J. C. Roos, Lucille Roos 1954-3-27 6054 Inyo Summit of Grapevine Mts. above Leadfield. 1584 Comment
  UC1087304  Cymopterus aboriginum John C. Roos 1955-5-16 6382 Inyo 1.5 mi sw of Loretto Mine (along Loretto Road, Inyo Mountains); Inyo Mountains, Loretto Road 1676 Comment
  LA25949  Cymopterus cinerarius John C. Roos; Lucille Roos 1952-7-27 5831 Inyo WHITE MOUNTAINS, ridge at SE rim Reed Flat. 3169 Comment
  CLARK-A1528-1433  Cymopterus panamintensis John C. Roos 1958-4-19 San Bernardino Lucerne Valley Comment
  RSA658861  Cymopterus panamintensis var. acutifolius J. C. Roos 1947-2-15 3243 Riverside Lost Palms Cyn. S face of Eagle Mtns., west of Hayfeilds. Comment
  RSA85158  Cyperus laevigatus J. C. Roos, L. Roos 1953-11-2 6042 Inyo Tecopa Hot Springs. 427 Comment
  CLARK-A1528-3073  Cystopteris fragilis John C. Roos 1937-7-20 1991 San Bernardino San Bernardino Mountains Comment
  RSA71698  Cystopteris fragilis J. C. Roos, Lucille Roos 1952-7-30 5871 Mono Crooked Creek, White Mountains 3049 Comment
  UCR25916  Dalea mollissima John C. Roos 1952-3-28 5427 Imperial Sonoran (Colorado) Desert, Truckhaven [Salton City], W side of Salton Sea 0 Comment
  CLARK-A1528-2770  Dalea polyadenia John C. Roos 1947-7-15 2826 Inyo Darwin Mesa 1523 Comment
  CLARK-A1528-2771  Dalea polyadenia John C. Roos 1954-6-28 6178 Inyo Eureka Valley 914 Comment
  NY703190  Dalea searlsiae J. C. Roos 1954-6-28 6167 Inyo Inyo Mountains 3 miles northeast of Andrews Mountain 2316 Comment
  RSA89042  Dalea searlsiae J. C. Roos, L. Roos 1954-6-28 6167 Inyo 3 miles NE of Andrews Mtn. 2317 Comment
  LA102204  Danthonia californica John C. Roos; 1947-6-21 3709 San Bernardino San Bernardino Mountains, Running Springs 1837 Comment
  UCR23891  Danthonia unispicata John C. Roos 1942-6-29 1258 Mariposa Sierra Nevada Mtns., Yosemite National Park, north of North Dome 2439 Comment
  POM265697  Datisca glomerata J. C. Roos 1937-5-29 826 San Bernardino Deep Creek, S edge of Mojave Desert Comment
  UCR18885  Datisca glomerata John C. Roos 1967-9-23 s.n. San Bernardino San Bernardino Mtns, Holcomb Creek 1585 Comment
  SEINET8465882 Image available Datura discolor J. C. Roos 1965-11-6 Riverside Desert, 26 miles west of Blythe Comment
  UCR30448  Datura stramonium John C. Roos 1965-10-6 s.n. Riverside Santa Ana River at Pedley 201 Comment
  CAS-BOT-BC130906  Deinandra arida J. C. Roos 1969-5-10 s.n. Kern Red Rock Canyon Comment
  UCSB37786  Deinandra fasciculata Roos, John 1965-6-19 Riverside Sky Line Drive, south of Corona, Santa Ana Mtns. Comment
  RSA444458  Delphinium cardinale J. C. Roos 1965-6-19 s.n. Riverside Hagador Canyon: Skyline Drive south of Corona. Comment
Read comments
May 21 2011
  CLARK-A1528-3855  Delphinium cardinale John C. Roos, Lucille Roos 1952-6-15 5775 San Bernardino Colton 320 Comment
  UCR27419  Delphinium glaucum John C. Roos 1965-8-9 s.n. Inyo Eastern Sierra Nevada Mtns, Onion Valley 2744 Comment
  CLARK-A1528-3862  Delphinium parishii subsp. parishii John C. Roos 1948-4-24 3791 Riverside Cabazon Comment
  CLARK-A1528-3408  Dendromecon rigida John C. Roos 1937-4-17 1385 San Bernardino Highlands Comment
  POM266618  Deschampsia cespitosa subsp. cespitosa J. C. Roos 1940-8-3 1554 San Bernardino Bear Valley, San Bernardino Mountains. 2134 Comment
  UCR23889  Deschampsia cespitosa subsp. cespitosa John C. Roos 1940-8-3 1554 San Bernardino San Bernardino Mtns., east end of Bear Valley 2073 Comment
  CAS-BOT-BC192561  Deschampsia cespitosa subsp. holciformis J. C. Roos 1957-7-2 6638 Mendocino Point Arena Lighthouse Comment
  CLARK-A1528-7797  Deschampsia danthonioides John C. Roos 1950-4-26 4762 San Bernardino Lucerne Valley 883 Comment
  POM263045  Deschampsia danthonioides J. C. Roos 1937-7-27 451 San Bernardino Bear Valley, Boulder Bay, San Bernardino Mountains. Comment
  UCR25459  Deschampsia danthonioides John C. Roos 1967-5-29 s.n. San Bernardino San Bernardino Mtns., Summit Valley 976 Comment
  POM263018  Deschampsia elongata J. C. Roos 1937-7-22 407 San Bernardino South Fork Santa Ana River 2134 Comment
  RSA44906  Descurainia incana subsp. incisa J. C. Roos 1947-8-9 3737 San Bernardino Bluff Lake, San Bernardino Mts. 2287 Comment
  UCR23483  Descurainia sophia Alfred R. Roos 1954-5-4 s.n. Los Angeles San Fernando Valley, 5001 Gaviota, Encino 218 Comment
  UCR30505  Descurainia sophia John C. Roos, A. R. Roos 1953-8-11 6002 Inyo Northern Mojave/Great Basin Desert, north slope of the Inyo Mtns: 3 mi east of Blue Bell Mine on the trail to Side Hill Spring 3110 Comment
  SEINET225364 Image available Dichanthelium acuminatum subsp. fasciculatum John Roos, Lucill Roose 1956-9-1 6598 Sonoma The Geysers. Comment
  UC1117448  Dichanthelium acuminatum subsp. fasciculatum J. C. Roos 1955-7-23 6511 Inyo mouth of Beveridge Canyon e base Inyo Mts., Saline Valley (Saline Valley) 609 Comment
  UCR26334  Dichanthelium acuminatum subsp. fasciculatum John C. Roos, L. Roos 1954-11-24 6262 Inyo Northern Mojave Desert, mouth of Beveridge Canyon, east base of Inyo Mtns, Saline Valley 610 Comment
  CLARK-A1528-1523  Dichelostemma pulchellum John C. Roos 1952-2-29 5380 Riverside Pigeon Pass Comment
  UCR23773  Dicoria canescens John C. Roos, L. Roos 1957-11-30 6659 Riverside Coachella Valley, 6 mi NW of Thousand Palms 152 Comment
  UCSB45524  Dicoria canescens Roos, John; Munz, Philip 1955-4-9 Inyo Eureka Valley 929 Comment
  CLARK-A1528-1798  Dicoria canescens subsp. clarkiae John C. Roos, Philip A. Munz 1954-9-18 20157 Inyo Eureka Valley 929 Comment
  CLARK-A1528-5324  Dicoria canescens subsp. clarkiae John C. Roos, Lucille Roos 1954-11-24 6266 Inyo Eureka Valley 929 Comment
  RSA104839  Dicoria clarkiae J. C. Roos 1955-5-13 6359 Inyo SE end of Eureka Valley. 945 Comment
  UCD131261  Dieteria canescens var. canescens J. C. Roos 1965-10-5 s.n. Riverside Exact location unknown. Comment
  UC1023432  Digitaria ciliaris J. C. and A. R. Roos 1950-9-16 4989 Los Angeles 1700 Westwood Blvd. Los Angeles 60 Comment
  CLARK-A1528-4584  Digitaria ischaemum John C. Roos, Alfred R. Roos 1950-9-16 4989 Los Angeles Los Angeles 60 Comment
  UCR25622  Digitaria ischaemum John C. Roos 1951-9-25 5276 Riverside Riverside, Fairmount Park 259 Comment
  CLARK-A1528-4587  Digitaria sanguinalis John C. Roos 1965-7-5 San Bernardino Loma Linda 304 Comment
  POM301714  Digitaria sanguinalis J. C. Roos 1937-8-17 2547 Riverside San Jacinto. Comment
  RSA89955  Digitaria sanguinalis J. C. Roos, L. Roos 1970-10-7 4997 -B San Bernardino Grand Terrace. Alt. 1000 ft. 305 Comment
  CLARK-A1528-4589  Distichlis spicata subsp. stricta John C. Roos 1937-5-10 2333 Riverside Elsinore Comment
  UCR25853  Ditaxis lanceolata John C. Roos, Lucille Roos 1949-4-6 4147 Riverside Sonoran (Colorado) Desert, Canyon in the Orocopia Mountains, 2.5 mi. NE of Dos Palmas Spring 152 Comment
  CLARK-A1528-2694  Ditaxis serrata John C. Roos 1946-11-30 3166 Riverside Chuckwalla Mountains Comment
  CLARK-A1528-3834  Dodecatheon alpinum John C. Roos 1947-6-27 3722 San Bernardino San Bernardino Mountains 2560 Comment
  UCR23259  Dodecatheon clevelandii John C. Roos 1958-4-3 s.n. Riverside Plateau in Reche Canyon Comment
  UCR19200  Dodecatheon jeffreyi John C. Roos 1965-8-9 s.n. Inyo Sierra Nevada Mountains, Meadow at Gilbert Creek near Independence Creek Comment
  CLARK-A1528-3837  Dodecatheon jeffreyi John C. Roos 1965-8-9 Inyo Sierra Nevada Comment
  CLARK-A1528-2313  Draba corrugata John C. Roos 1941-8-27 probably 42 San Bernardino San Bernardino Mountains 3352 Comment
  CLARK-A1528-4886  Draba cuneifolia John C. Roos 1937-2-27 1297 Riverside San Timoteo Canyon Comment
  CLARK-A1528-2315  Draba cuneifolia var. integrifolia John C. Roos 1952-2-29 5369 Riverside Reche Canyon 548 Comment
  UCR23449  Draba lemmonii John C. Roos 1937-8-8 1020 Inyo Sierra Nevada Mountains, Lone Pine Canyon, Whitney Pass 4116 Comment
  RSA71379  Draba oligosperma J. C. Roos, L. Roos 1951-8-10 5151 Mono 1 mile SE of White Mtn Peak, White Mtns. 4024 Comment
  CLARK-A1528-2621  Dudleya cymosa John C. Roos 1948-6-26 3895 San Bernardino San Bernardino Mountains Comment
  UCSB37896  Dudleya cymosa Roos, John 1965-6-29 San Bernardino Mill Creek Canyon at Igo's; San Bernardino Mtns. Comment
  RSA591738  Dudleya lanceolata Roos 1965-6-16 s.n. Orange Dana Point Comment
  CLARK-A1528-1135  Dudleya saxosa subsp. aloides John C. Roos 1947-5-17 3625 Los Angeles Placerita Canyon Comment
  CLARK-A1528-4867  Dudleya saxosa subsp. aloides John C. Roos 1937-6-14 1787 San Diego Descanso Junction Comment
  RSA45211  Dudleya saxosa subsp. aloides J. C. Roos, L. Roos 1949-4-23 4285 Riverside Monson Canyon, Eagle Mountains. Comment
  HSC78530  Dyssodia papposa J. C. Roos, L. Roos May 1952 5056 San Bernardino Loma Linda, corner of Central & Anderson. 335 Comment
  UCD131233  Dyssodia papposa John Roos; Lucille Roos 1952-5-1 5056 -a San Bernardino corner of Central and Anderson, Loma Linda. 335 Comment
  UCR25144  Dyssodia papposa John C. Roos, L. Roos 1951-5-31 5056 San Bernardino San Bernardino Valley, Loma Linda, corner of Central & Anderson. 335 Comment
  RSA662541  Dyssodia papposa J. C. Roos, L. Roos 1952-05 5056 -a San Bernardino Loma Linda, corner of Central & Anderson. 335 Comment
  CLARK-A1528-4594  Echinochloa colona John C. Roos 1965-9-14 5202 San Bernardino Loma Linda 323 Comment
  CLARK-A1528-4597  Echinochloa crus-galli John C. Roos 1937-6-7 1427 Ventura Fillmore Comment
  CLARK-A1528-1485  Echinodorus berteroi John C. Roos 1965-10-10 San Diego Otay Lake Comment
  RSA450132  Echinodorus berteroi J. C. Roos 1965-10-10 s.n. San Diego Otay Lake Comment
  UCR17541  Echinodorus berteroi John C. Roos 1952-5-28 5727 Riverside Perris-Aguanga Basin region, San Jacinto River bottomland 1 mile southeast of Perris 427 Comment
  CLARK-A1528-1140  Elatine brachysperma John C. Roos 1937-7-18 397 San Bernardino San Antonio Canyon Comment
  RSA501119  Elatine chilensis J. C. Roos 1962-7-21 s.n. San Bernardino San Bernardino Mtns., Dry Lake Comment
  CLARK-A1528-2964  Elodea nuttallii John C. Roos 1968-8-27 Fresno Sierra Nevada 3200 Comment
  CAS-BOT-BC203836  Elymus X hansenii J. C. Roos 1952-6-13 5765 Riverside Reche Canyon 457 Comment
  CLARK-A1528-4602  Elymus cinereus John C. Roos, Lucille Roos 1951-8-12 5185 Inyo White Mountains 3108 Comment
  UCR26333  Elymus cinereus John C. Roos 1949-6-28 4524 San Bernardino Eastern Mojave Desert, Beck Spring, Kingston Mtns 1350 Comment
  CAS-BOT-BC227764  Elymus elymoides J. C. Roos 1965-7-17 s.n. San Bernardino Barton Flats, San Bernardino Mtns. Comment
  UCSB50324  Elymus elymoides subsp. elymoides Roos, John 1965-6-16 San Bernardino North slope of Cajon Pass Comment
Read comments
May 18 2011
  RSA40582  Elymus multisetus J. C. Roos 1947-7-13 2889 Inyo Near Arcane Meadows, Panamint Mountains. 3018 Comment
  UCR19687  Elymus stebbinsii John C. Roos 1957-6-1 6612 San Bernardino San Bernardino Mtns., Yucaipa Ridge, 0.5 mi south of Mill Creek Public Camp, Mill Creek Comment
  UC1010200  Elymus trachycaulus John and Lucille Roos 1951-8-12 5184 Inyo Reed Flat White Mts. 3169 Comment
  POM262947  Encelia actoni J. C. Roos 1941-5-10 s.n. Riverside Pinyon Flats Camp, Santa Rosa Mountains. 1220 Comment
  UCR26134  Encelia actoni John C. Roos 1947-3-15 3342 Riverside San Jacinto Valley, Valle Vista, east of Hemet 549 Comment
  CAS-BOT-BC131186  Encelia californica John C. Roos 1952-4-16 5557 Riverside Pigeon Pass, Box Springs Mts. 396 Comment
  CLARK-A1528-1806  Encelia californica John C. Roos 1952-4-16 5557 Riverside Box Springs Mountains 396 Comment
  RSA85478  Encelia californica J. C. Roos 1952-4-16 5557 Riverside Box Springs Mountains, Pigeon Pass. 396 Comment
  CAS-BOT-BC221819  Enneapogon desvauxii J. C. Roos 1950-9-3 4970 San Bernardino South side Clark Mtn., Mojave Desert 1828 Comment
  CLARK-A1528-4932  Ephedra viridis John C. Roos 1948-7-3 3906 Inyo Panamint Range 2834 Comment
  CLARK-A1528-3341  Epilobium adenocaulon var. holosericeum John C. Roos 1937-7-31 967 San Bernardino San Bernardino 304 Comment
  CLARK-A1528-3340  Epilobium angustifolium John C. Roos 1937-7-22 1164 San Bernardino Mount San Gorgonio Comment
  UCR17539  Epilobium campestre John C. Roos 1952-5-28 5731 Riverside Perris-Aguanga Basin region, San Jacinto River bottomland 1 mile southeast of Perris 427 Comment
  UCSB37835  Epilobium campestre Roos, John 1952-5-28 Riverside San Jacinto river bottomlands, 1 mile south-east of Perris 426 Comment
  POM265816  Epilobium canum subsp. canum J. C. Roos 1941-10-11 866 Los Angeles Mandeville Canyon, Santa Monica Mountains. Comment
  UCR27665  Epilobium ciliatum John C. Roos, L. Roos 1949-6-26 4499 San Bernardino Eastern Mojave Desert, Kingston Mountains, Horse [Thief] Springs 1451 Comment
  RSA85515  Epilobium ciliatum subsp. ciliatum J. C. Roos 1952-4-23 5577 Riverside West side Box Springs Mountains above Canyon Crest Heights. 457 Comment
  UCR23473  Epilobium hallianum John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, Snow Valley Comment
  UCSB42120  Epilobium oregonense Roos, John 1965-7-31 San Bernardino South Fork of the Santa Ana River, San Bernardino Mtns 2286 Comment
  UCR24192  Epipactis gigantea John C. Roos 1940-5-25 1903 San Bernardino San Bernardino Valley, at mouth of Santa Ana River, above Highland Comment
  CLARK-A1528-4950  Equisetum arvense John C. Roos 1936-7-12 San Bernardino San Bernardino Comment
  CLARK-A1528-4634  Eragrostis cilianensis John C. Roos 1938-8-19 San Bernardino Loma Linda Comment
  CLARK-A1528-4637  Eragrostis cilianensis Alfred R. Roos 1927-9-22 10176 Riverside La Sierra Comment
  RSA450450  Eragrostis cilianensis J. C. Roos 1937-11-12 s.n. San Bernardino Loam Linda. 305 Comment
  UCSB51406  Eragrostis curvula Roos, John 1965-9-16 Riverside Lakeview Comment
Read comments
Sep 19 2018
  CLARK-A1528-4642  Eragrostis mexicana John C. Roos 1940-8-22 1608 San Bernardino Loma Linda Comment
  RSA450464  Eragrostis mexicana subsp. virescens J. C. Roos 1965-7-7 s.n. Riverside San Jacinto. On the edge of alfalfa field. Comment
  UCR25240  Eragrostis mexicana subsp. virescens Alfred R. Roos 1937-11-25 s.n. San Bernardino San Bernardino Valley/San Bernardino Mtns. Foothills, Highland, east of San Bernardino 457 Comment
  UCR20583  Eragrostis minor John C. Roos, A. R. Roos 1950-8-7 4921 San Bernardino Northeastern Mojave Desert, Beck Spring, Kingston Mountains 1372 Comment
  OBI35845  Eragrostis pectinacea A. R. Roos 1937-11-25 s.n. San Bernardino Highland, E of San Bernardino Comment
  RSA314966  Eragrostis pectinacea J. C. Roos 1939-9-16 s.n. San Bernardino Mentone Comment
Read comments
Aug 10 2007
  SEINET227610 Image available Eragrostis pectinacea J. C. Roos 1965-7-5 San Bernardino Loma Linda. 305 Comment
  UCR25093  Eragrostis pectinacea var. pectinacea Alfred R. Roos 1929-6-3 3172 Tulare Tulare City Comment
  UCR32898  Eragrostis pectinacea var. pectinacea Alfred R. Roos 1937-11-25 s.n. San Bernardino San Bernardino Valley/San Bernardino Mtns. Foothills, Highland, east of San Bernardino 457 Comment
  UCR23767  Erechtites argutus John C. Roos, D. V. Hemphill 1957-6-30 6621 Mendocino North Coast, Albion River inlet 2 Comment
  CLARK-A1528-1812  Erechtites argutus John C. Roos, D. V. Hemphill 1957-6-30 6621 Mendocino Albion River 1 Comment
  CLARK-A1528-433  Eremocarpus setiger John C. Roos 1951-9-25 5291 San Bernardino Highgrove 274 Comment
  RSA664936  Eremocarpus setiger J. C. Roos 1965-7-27 s.n. Riverside Elsinore. Comment
  CAS-BOT-BC181724  Eremogone kingii var. glabrescens J. C. Roos; A. R. Roos 1953-8-9 5954 Inyo North slope near head of Tamarack Canyon, Inyo Mts. 3048 Comment
  UC1023403  Eremothera boothii subsp. desertorum J. C. and A. R. Roos 1953-8-10 5977 Inyo Mazourka Canyon Inyo Mts. 2438 Comment
  RSA0105535  Eriastrum densifolium subsp. austromontanum J. C. Roos 1936-8-15 574 San Bernardino 2 miles east of Glen Martin, San Bernardino Mts. Comment
  RSA0119626  Eriastrum densifolium subsp. austromontanum J. C. Roos 1937-7-5 s.n. Ventura Upper Sespe Creek. Comment
  CLARK-A1528-3493  Eriastrum eremicum John C. Roos 1965-6-16 San Bernardino Mojave Desert Comment
  RSA0124799  Eriastrum wilcoxii J. C. Roos, A. R. Roos 1954-6-12 6135 Inyo North face Wild Rose Peak at head of Trail canyon. 2683 Comment
  RSA0125134  Eriastrum wilcoxii J. C. Roos 1947-7-12 2834 Inyo Wildrose canyon, Panamint Mountains. 2378 Comment
  GH387226  Ericameria albida J. C. Roos & A. R. Roos 1954-8-15 6224 Unknown Lower Warm Spring, Saline Valley 426 Comment
  UC1010327  Ericameria albida John and Lucille Roos 1954-9-14 6235 Inyo 2.5 mi ne of Death Valley Junction (along Ash Meadows road); Amargosa Desert 624 Comment
  RSA48882  Ericameria cuneata J. C. Roos 1949-9-2 4641 San Bernardino N slope of the Kingston Mtns. 2012 Comment
  UCR20321  Ericameria cuneata John C. Roos, R. Weatherby 1949-9-2 4641 San Bernardino Eastern Mojave Desert, north slope of the Kingston Range 2073 Comment
  CAS-BOT-BC286837  Ericameria discoidea J. C. Roos; A. R. Roos 1955-8-26 6552 Inyo North shoulder Waucoba Mt., Inyo Mts. 3261 Comment
  RSA79689  Ericameria discoidea J. C. Roos, A. R. Roos 1953-8-9 5963 Inyo Inyo Mountains near head of Tamarack Canyon. 3078 Comment
  UC1010259  Ericameria discoidea J. C. and A. R. Roos 1953-8-9 5963 Inyo n slope near head Tamarack Canyon; Inyo Mts. 3078 Comment
  UC1234662  Ericameria discoidea J. C. and A. R. Roos 1955-8-26 6552 Inyo n shoulder Waucoba Mt.; Inyo Mts., Waucoba Mt. 3261 Comment
  UCR26086  Ericameria ericoides John C. Roos 1948-8-27 3964 Monterey Central Coast, Santa Lucia Mtns, coast between Carmel and Big Sur 91 Comment
  GH417143  Ericameria gilmanii J. C. Roos & A. R. Roos 1954-8-14 6216 Unknown The Narrows, Marble Canyon, Inyo Mts. 2179 Comment
  UCR23898  Ericameria gilmanii John C. Roos 1956-8-29 6597 Inyo Northern Mojave Desert, Panamint Mountains, head of Death Valley Canyon 2300 Comment
  CAS-BOT-BC287505  Ericameria laricifolia John C. Roos 1950-9-1 4956 San Bernardino Vicinity of Coliseum Mine, Clark Mts, Eastern Mojave Desert 1615 Comment
  CAS-BOT-BC292384  Ericameria nana J. C. Roos; A. R. Roos 1955-8-24 6538 Inyo Summit ridge of Last Chance Mts, 3.5 miles S of Willow Spring 2438 Comment
  RSA155723  Ericameria nana J. C. Roos 1955-6-19 6443 Inyo Last Chance Mountains: 3.5 miles south of Willow Spring 2439 Comment
  CAS-BOT-BC299050  Ericameria nauseosa var. hololeuca John C. Roos 1950-9-3 4972 San Bernardino Canyon on S slope of Clark Mts, NW of Mountain Pass, E Mojave Desert 1889 Comment
  UCR19507  Ericameria nauseosa var. oreophila John C. Roos 1965-9-18 s.n. Inyo Owens Valley, Lone Pine, flats near Owens River bottom 1098 Comment
  RSA155740  Ericameria parishii J. C. Roos 1955-9-3 6571 San Bernardino 2 miles W of Loma Linda. 335 Comment
  POM266283  Ericameria parishii var. parishii J. C. Roos 1937-10-30 2261 Los Angeles Lytle Creek, east end of San Gabriel Mts. Comment
  UCSB37812  Ericameria teretifolia Roos, John 1965-9-18 Inyo Wild Rose Canyon, Panamint Mtns. Comment
  CAS-BOT-BC293533  Erigeron aphanactis var. aphanactis John C. Roos 1955-5-15 6380 Inyo Willow Creek, Last Chance Mts. 1584 Comment
  CAS-BOT-BC293571  Erigeron argentatus J. C. Roos 1955-6-18 6424 Inyo 2 miles NE of Willow Spring, Last Chance Mountains 2011 Comment
  CAS-BOT-BC293578  Erigeron argentatus John Roos; Lucille Roos 1952-7-25 5817 Inyo Between Westgaard [Westgard] Pass and Reed Flat, White Mts. 2438 Comment
  RSA44919  Erigeron breweri var. covillei J. C. Roos 1947-6-21 3691 San Bernardino Fawnskin, Bear Valley. Comment
  RSA45215  Erigeron breweri var. covillei J. C. Roos 1949-5-14 4293 San Bernardino 4 miles W of Hesperia. 1006 Comment
  CAS-BOT-BC294857  Erigeron breweri var. porphyreticus John Roos; Lucille Roos 1949-6-27 4509 San Bernardino High ridge, Kingston Mts. NE San Bernardino Co. 2133 Comment
  RSA155686  Erigeron breweri var. porphyreticus J. C. Roos 1955-6-20 6456 Inyo 2 miles NE of Willow Spring. 1982 Comment
  CAS-BOT-BC294940  Erigeron clokeyi J. C. Roos 1965-7-10 s.n. Inyo Arcane Meadow, near Telescope Peak, Panamint Mountains Comment
  CAS-BOT-BC294941  Erigeron clokeyi J. C. Roos 1955-7-21 6482 Inyo North face Whitetop Peak, summit Last Chance Mountains Comment
  UCR25679  Erigeron clokeyi John C. Roos, A. R. Roos 1953-8-9 5953 Inyo Northern Mojave Desert Region, Inyo Mountains, near head of Tamarack Canyon 3049 Comment
  UCSB45551  Erigeron clokeyi Roos, John 1965-7-10 Inyo Arcane Meadow, near Telescope Peak, Panamint Mountains Comment
  UC1010178  Erigeron clokeyi var. pinzliae John and Lucille Roos 1951-8-8 5100 Mono Big Prospector Meadow White Mts., Big Prospector Meadow 3200 Comment
  UC1234810  Erigeron clokeyi var. pinzliae J. C. Roos 1955-7-21 6482 Inyo n face, Whitetop Peak,summit Last Chance Mountains; Whitetop Peak 2499 Comment
  CLARK-A1528-1820  Erigeron divergens John C. Roos 1965-7-18 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-1821  Erigeron divergens John C. Roos 1955-4-7 6302 Inyo Hunter Canyon 350 Comment
  CLARK-A1528-4877  Erigeron foliosus John C. Roos 1938-5-26 474 Riverside La Sierra Comment
  RSA44886  Erigeron foliosus var. hartwegii J. C. Roos 1948-9-1 3950 Siskiyou Summit of pass SW of Etna Comment
  POM264143  Erigeron inornatus var. biolettii J. C. Roos 1939-4-16 252 Napa Angwin. Comment
  CLARK-A1528-1853  Erigeron philadelphicus John C. Roos 1952-5-20 5700 San Bernardino 304 Comment
  CLARK-A1528-1828  Erigeron pumilus John C. Roos 1943-7-4 2719 San Bernardino San Bernardino Mountains 2986 Comment
Read comments
Jul 3 2014
  UCR24426  Erigeron strigosus John C. Roos 1957-7-10 6654 San Bernardino San Bernardino Valley, Loma Linda 396 Comment
  RSA47473  Erigeron uncialis J. C. Roos 1949-5-28 4361 San Bernardino Clark Mountain. 1890 Comment
  RSA71375  Erigeron vagus J. C. Roos, L. Roos 1951-8-10 5146 Mono NE face White Mt. Peak, White Mountains 4299 Comment
  RSA444801  Eriochloa acuminata J. C. Roos 1957-6-20 6614 San Bernardino Loma Linda. 305 Comment
  RSA69818  Eriochloa acuminata J. C. Roos 1951-9-25 5294 Riverside Riverside 259 Comment
  RSA78232  Eriochloa acuminata J. C. Roos 1951-8-4 5080 San Bernardino South end Mountain View Ave., San Bernardino Valley. 366 Comment
  UCD65711  Eriochloa acuminata A. R. Roos 1937-11-25 San Bernardino San Bernardino County. Comment
  UCR24001  Eriochloa acuminata Alfred R. Roos 1937-11-28 s.n. Riverside East Washington Street, Riverside 457 Comment
  LA206376  Eriochloa acuminata var. acuminata John C. Roos; 1950-8-22 4945 San Bernardino San Bernandino Valley, Highland 457 Comment
  CLARK-A1528-4616  Eriochloa aristata John C. Roos 1937-8-20 477 Riverside Blythe Comment
  CAS-BOT-BC282997  Eriochloa lemmonii A. R. Roos 1937-11-28 s.n. Riverside East Washington St., Riverside Comment
  CAS-BOT-BC283000  Eriochloa lemmonii John C. Roos 1950-8-22 4945 San Bernardino Highland, San Bernardino Valley 457 Comment
  CAS-BOT-BC283001  Eriochloa lemmonii A. R. Roos 1937-11-25 s.n. San Bernardino Highland Comment
  CLARK-A1528-2969  Eriodictyon crassifolium John C. Roos 1937-4-18 1361 Riverside Snow Creek Comment
  RSA444486  Eriodictyon crassifolium J. C. Roos 1947-3-15 3340 Riverside San Jacinto Mtns: Cranston Ranger Station, E of Hemet, west base of Mtns. 610 Comment
  CLARK-A1528-1027  Eriodictyon trichocalyx John C. Roos 1941-5-13 132 San Bernardino San Bernardino Mountains 761 Comment
  UCR24319  Eriogonum apiculatum John C. Roos 1937-8-18 2532 Riverside San Jacinto Mountains, Above Idyllwild Comment
  UC1234834  Eriogonum baileyi var. baileyi J. C. and A. R. Roos 1955-8-24 6535 Inyo 2 mi ne Willow Spring; Last Chance Mts. 2011 Comment
  CLARK-A1528-3619  Eriogonum brachyanthum John C. Roos 1955-7-24 6523 Inyo 1889 Comment
  CAS-BOT-BC241875  Eriogonum cernuum J. C. Roos 1955-7-23 6507 Inyo Soldier Flat at east base Waucoba Mountain, Inyo Mountains 2194 Comment
  RSA71395  Eriogonum cernuum var. cernuum J. C. Roos, L. Roos 1951-8-11 5167 Mono White Mountains: NW side Big Prospector Meadow 3262 Comment
  CLARK-A1528-3623  Eriogonum crocatum John C. Roos 1958-5-22 Los Angeles Santa Monica Mountains Comment
  UCR24315  Eriogonum crocatum John C. Roos 1958-5-22 s.n. Ventura Western Transverse Range; Santa Monica Mtns., Conejo Grade, north base of the Santa Monica Mtns. Comment
  CLARK-A1528-3644  Eriogonum davidsonii John C. Roos 1937-5-31 1820 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-3730  Eriogonum davidsonii John C. Roos 1937-7-18 403 Los Angeles San Antonio Canyon 914 Comment
  OBI33222  Eriogonum davidsonii J. C. Roos 1947-8-2 3732 San Bernardino Burns Wash, E end of the San Bernardino Mts Comment
  CLARK-A1528-3636  Eriogonum deflexum John C. Roos 1937-8-9 1010 Mono Walker Pass Comment
  UCR25398  Eriogonum deflexum John C. Roos 1937-4-27 774 San Bernardino Eastern Mojave Desert, Goffs Comment
  CAS-BOT-BC256244  Eriogonum deflexum var. baratum J. C. Roos 1955-7-22 6499 Inyo Willow Creek, west slope Last Chance Mountains 1615 Comment
  RSA155698  Eriogonum deflexum var. baratum J. C. Roos 1955-7-22 6499 Inyo Willow Creek, W slope Last Chance Mtns. 1616 Comment
  RSA393501  Eriogonum elongatum var. elongatum A. R. Roos 1922-11-8 s.n. Los Angeles San Gabriel Mountians: Lytle Creek Canyon 915 Comment
Read comments
Aug 18 2012
  CLARK-A1528-3647  Eriogonum fasciculatum subsp. foliolosum John C. Roos 1951-9-23 5235 San Bernardino Reche Canyon 304 Comment
  RSA104293  Eriogonum fasciculatum var. polifolium J. C. Roos 1955-5-13 6347 Inyo West base Last Chance Mountains, east of Eureka Valley sand dunes 1220 Comment
  UC1236268  Eriogonum fasciculatum var. polifolium John C. Roos 1955-5-13 6347 Inyo e Eureka Valley Sand Dunes (west base Last Chance Mts.); Last Chance Mts. 1219 Comment
  CAS-BOT-BC33657  Eriogonum glandulosum John C. Roos; A. R. Roos 1955-8-23 6527 Inyo West base Last Chance Mts. east of Eureka Valley sand dunes. 1158 Comment
  CLARK-A1528-3650  Eriogonum gracile John C. Roos, Lucille Roos 1951-9-29 5305 San Bernardino Warm Creek Comment
  UCR20400  Eriogonum gracile var. gracile John C. Roos 1952-8-27 5888 Riverside Peninsular Range, Riverside; Pigeon Pass, Box Springs Mtns. 457 Comment
Read comments
Apr 16 2011
  RSA71759  Eriogonum gracilipes J. C. Roos, L. Roos 1951-8-8 5104 Mono Big Prospector Meadow at head of Crooked Creek, White Mountains 3201 Comment
  CLARK-A1528-4741  Eriogonum heermannii John C. Roos, Lucille Roos 1954-6-28 6171 Inyo Inyo Mountains 1615 Comment
  POM274230  Eriogonum heermannii J. C. Roos 2830 Inyo Wildrose Canyon. Panamint Mountain Range. 1280 Comment
  CLARK-A1528-3651  Eriogonum heermannii subsp. argense John C. Roos 1946-9-21 3078 San Bernardino 1523 Comment
  CAS-BOT-BC261209  Eriogonum heermannii var. humilius John Roos; Lucille Roos 1956-6-28 6171 Inyo Canyon along Loretto Road near Loretto Mine, Inyo Mts. 1615 Comment
  CAS-BOT-BC252279  Eriogonum heermannii var. sulcatum J. C. Roos; A. R. Roos 1950-8-6 4916 San Bernardino Ridge N.E. of Kingston Peak, Kingston Mts., eastern Mohave [Mojave] Desert 2133 Comment
  CLARK-A1528-3658  Eriogonum incanum John C. Roos 1937-8-5 1660 Mono White Mountains 2743-3048 Comment
  RSA107082  Eriogonum kearneyi subsp. monoense J. C. Roos, A. R. Roos 1954-8-15 6219 Inyo Whipoorwill (or Soldier) Flat, east side Waucoba Mtn., Inyo Mountains. 2165 Comment
  RSA155658  Eriogonum kearneyi subsp. monoense J. C. Roos, A. R. Roos 1955-8-25 6545 Inyo Last Chance Mountains, 0.1 mile NW of boundary marker # 80, east of Willow Spring. 2073 Comment
  UCR24261  Eriogonum kearneyi var. monoense John C. Roos, E. C. Jaeger 1955-7-22 6503 Inyo Northern Mojave Desert, Soldier Flat, east base Waucoba Mtn, Inyo Mtns. 2195 Comment
  CLARK-A1528-3664  Eriogonum kennedyi var. alpigenum John C. Roos 1946-9-4 2962 San Bernardino San Bernardino Mountains 3352 Comment
  POM263035  Eriogonum kennedyi var. austromontanum J. C. Roos 1937-7-26 346 San Bernardino Bear Valley, San Bernardino Mountains. Comment
  RSA79552  Eriogonum microtheca var. lapidicola J. C. Roos 1953-8-11 5985 Inyo East of Badger Flat 2866 Comment
  CLARK-A1528-3667  Eriogonum microthecum var. foliosum John C. Roos 1950-8-4 San Bernardino Clark Mountain Comment
  UCR162974  Eriogonum microthecum var. lapidicola John C. Roos 1967-8-6 s.n. Inyo Inyo Mountains, 1 mile NE of Badger Flat Comment
  UCR31673  Eriogonum microthecum var. lapidicola John C. Roos 1967-8-6 s.n. Inyo Northern Mojave Desert, Inyo Mountains, 2 mi. NE of Badger Flats Comment
  UCR19260  Eriogonum microthecum var. simpsonii John C. Roos 1949-8-13 4613 San Bernardino Eastern Mojave Desert, Keystone Canyon, New York Mtns. 1768 Comment
  CAS-BOT-BC268807  Eriogonum nidularium John Roos; Lucille Roos 1947-7-15 2824 Inyo Darwin Mesa 1524 Comment
  CLARK-A1528-3677  Eriogonum nudum subsp. pauciflorum John C. Roos 1943-10-16 2740 Riverside Little San Bernardino Mountains Comment
  CLARK-A1528-3679  Eriogonum nudum subsp. saxicola John C. Roos 1937-8-10 1044 Kern Bodfish Comment
  UCR24265  Eriogonum nudum var. pauciflorum John C. Roos 1943-10-16 2740 Riverside Southern Mojave Desert, Falcon Flats, Little San Bernardino Mtns 1524 Comment
  CAS-BOT-BC258752  Eriogonum ovalifolium var. ovalifolium John Roos; Lucille Roos 1952-7-31 5877 Inyo 1 mile south of Reed Flat, White Mts. 2834 Comment
  SD53016  Eriogonum ovalifolium var. ovalifolium John C. Roos 1955-6-17 6405 Inyo 2 miles NE of Willow Spring, Last Chance Mountains 2012 Comment
  UCR30508  Eriogonum panamintense John C. Roos, A. R. Roos 1953-8-11 5992 Inyo Northern Mojave/Great Basin Desert, Inyo Mtns: 2-2.5 mi east of Blue Bell Mine 2866 Comment
  CLARK-A1528-5572  Eriogonum panamintense subsp. panamintense John C. Roos, Lucille Roos 1947-7-15 2869 Inyo Panamint Mountains 2133 Comment
  CAS-BOT-BC266930  Eriogonum panamintense var. mensicola J. C. Roos 1955-7-24 6521 Inyo Nelson Range near head of Grapevine Canyon 1889 Comment
  RSA155757  Eriogonum panamintense var. panamintense J. C. Roos, A. R. Roos 1955-8-27 6562 Inyo Soldier Flat, east base Waucoba Mt., Inyo Mountains. 2165 Comment
  CLARK-A1528-3686  Eriogonum parishii John C. Roos 1946-8-27 2921 Riverside Santa Rosa Mountains 2194 Comment
  UCR24268  Eriogonum parishii John C. Roos 1966-8-6 s.n. San Bernardino San Bernardino Mtns., Fish Creek Comment
  CLARK-A1528-5181  Eriogonum plumatella John C. Roos 1965-7-21 San Bernardino Victorville Comment
  UCR24311  Eriogonum plumatella John C. Roos 1946-10-5 3108 San Bernardino San Bernardino Mtns., mouth of Pipes Creek, east slope of mtns 1311 Comment
  UCR24320  Eriogonum plumatella John C. Roos 1943-10-17 2742 Riverside Sonoran (Colorado) Desert, Dry Morongo Wash 671 Comment
  CLARK-A1528-3696  Eriogonum pusillum John C. Roos 1937-7-14 1817 San Bernardino San Bernardino Comment
  CLARK-A1528-3745  Eriogonum pusillum John C. Roos 1941-4-5 197 San Bernardino Dry Morongo Canyon Comment
  CLARK-A1528-5180  Eriogonum pusillum John C. Roos 1937-7-14 1817 San Bernardino San Bernardino Comment
  POM263052  Eriogonum pusillum J. C. Roos 1941-4-5 197 San Bernardino Dry Morongo Canyon, Colorado Desert. Comment
  CLARK-A1528-3703  Eriogonum rixfordii John C. Roos 1965-9-18 Inyo Panamint Mountains Comment
  UCSB42256  Eriogonum rixfordii Roos, John 1965-9-18 Inyo Wildrose Canyon, Panamint Mtns Comment
  CLARK-A1528-3705  Eriogonum roseum John C. Roos 1937-8-5 615 Inyo White Mountain Comment
  POM265720  Eriogonum roseum J. C. Roos 1937-8-11 2569 Kern Frazier Mt. Park. Comment
  RSA71773  Eriogonum rupinum J. C. Roos, L. Roos 1951-8-8 5119 Inyo Locally common on rocky west slope with Arenaria aculeata, Holodiscus dumosus, etc., ridge 1 mi. south of Reed Flat, White Mts. 2957 Comment
  UCR24318  Eriogonum thurberi John C. Roos, L. Roos 1952-6-15 5774 San Bernardino San Bernardino Valley, along the Santa Ana River in Colton 290 Comment
  RSA0080083  Eriogonum thurberi J. C. Roos, L. Roos 1952-6-15 5774 San Bernardino Along the Santa Ana River in Colton. 289 Comment
  UCR24213  Eriogonum trichopes John C. Roos 1955-7-24 6520 Inyo Northern Mojave Desert, Nelson Range near head of Grapevine Canyon 1890 Comment
  CLARK-A1528-3713  Eriogonum umbellatum John C. Roos 1941-8-15 69 Inyo Death Valley National Park Comment
  RSA71741  Eriogonum umbellatum var. dichrocephalum J. C. Roos 1952-7-30 5858 Inyo East side Reed Flat, White Mts. 3079 Comment
  RSA48682  Eriogonum umbellatum var. juniporinum J. C. Roos 1949-8-13 4611 San Bernardino Copper Queen Mine, Keystone Canyon, New York Mtns. 1829 Comment
Read comments
Dec 22 2011
  CAS-BOT-BC262196  Eriogonum umbellatum var. versicolor J. C. Roos 1955-6-19 6432 Inyo One mile SE of Willow Spring, Last Chance Mountains 1950 Comment
  RSA71675  Eriogonum umbellatum var. versicolor J. C. Roos, Lucille Roos 1951-8-9 5126 Inyo Reed Flat, White Mountains 3171 Comment
  UCR31674  Eriogonum umbellatum var. versicolor John C. Roos 1948-7-3 3903 Inyo Northern Mojave Desert, Panamint Mountains, Arcane Meadows 3018 Comment
  POM263559  Eriogonum wrightii var. membranaceum J. C. Roos 1937-8-17 360 Riverside Near Idyllwild, San Jacinto Mountains. Comment
  CAS-BOT-BC264952  Eriogonum wrightii var. subscaposum J. C. Roos; A. R. Roos 1953-8-8 5943 Inyo NW end Badger Flat, Inyo Mts. 2682 Comment
  POM302507  Eriogonum wrightii var. subscaposum J. C. Roos 1943-7-4 2721 San Bernardino Sugarloaf Peak, San Bernardino Mountains. 2988 Comment
  RSA48672  Eriogonum wrightii var. wrightii J. C. Roos 1949-9-3 4633 San Bernardino Tecopa Pass, Kingston Mountains. 1524 Comment
  UCR26245  Eriogonum wrightii var. wrightii John C. Roos 1937-8-25 2027 San Bernardino Eastern Mojave Desert, Barnwell, near the New York Mountains 457 Comment
  CAS-BOT-BC297385  Eriophyllum confertiflorum J. C. Roos 1981-8-1 s.n. San Bernardino Upper Santa Ana basin, near Fish Creek, San Bernardino Mts Comment
  UCR23793  Eriophyllum lanatum var. obovatum John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, Running Springs 1838 Comment
  CLARK-A1528-1839  Eriophyllum multicaule John C. Roos 1940-5-4 882 Riverside Reche Canyon Comment
  UCR23699  Erodium moschatum John C. Roos 1943-3-7 2642 Los Angeles Santa Monica, near Sawtell Comment
  UCR26267  Erodium texanum John C. Roos 1966-3-20 s.n. Riverside Sonoran (Colorado) Desert, Mouth of Lost Palms Wash, Eagle Mountains Comment
  RSA71407  Erysimum capitatum J. C. Roos, L. Roos 1951-8-11 5180 Mono NW end Big Prospector Meadow, White Mtns. 3262 Comment
  CAS-BOT-BC55062  Erysimum perenne John Roos; Lucille Roos 1951-8-11 5180 Mono Northwest end Big Prospector Meadow, White Mountains. 3261 Comment
  UCR19214  Eschscholzia glyptosperma John C. Roos 1965-6-16 s.n. San Bernardino Western Mojave Desert, four miles north of Adelanto 854 Comment
  CLARK-A1528-5491  Eucalyptus rudis John C. Roos 1947-12-29 San Bernardino Redlands Comment
  CLARK-A1528-5689  Eucnide urens John C. Roos 1947-4-19 3483 Inyo Death Valley National Park Comment
  RSA444470  Eucnide urens J. C. Roos 1961-7-9 s.n. Inyo Range NE of Trona, Inyo County Comment
  RSA45512  Eucrypta micrantha J. C. Roos, L. Roos 1949-4-9 4204 San Bernardino Roadside NW of Cross Roads, Whipple Mtns. Comment
  UCSB42179  Eucrypta micrantha Roos, John 1958-2-21 Riverside Corn Springs, Chuckawalla Mtns. Comment
  CLARK-A1528-2974  Eucrypta micrantha John C. Roos 1955-4-6 6296 Inyo Saline Valley Comment
  CAS-BOT-BC206920  Euonymus occidentalis J. C. Roos 1965-7-3 s.n. Riverside Dark Canyon, San Jacinto Mtns. Comment
  CLARK-A1528-2490  Euonymus occidentalis subsp. parishii John C. Roos 1941-8-2 Riverside San Jacinto Mountains Comment
  CLARK-A1528-2491  Euonymus occidentalis subsp. parishii John C. Roos 1943-8-8 269 Riverside San Jacinto Mountains 1828 Comment
Read comments
Mar 22 2014
  CLARK-A1528-2697  Euphorbia eriantha John C. Roos 1946-10-26 3140 Riverside Chuckwalla Mountains Comment
Read comments
Jan 30 2015
  CLARK-A1528-2700  Euphorbia fendleri John C. Roos 1951-8-12 5193 Inyo White Mountains 2194 Comment
  CLARK-A1528-5001  Euphorbia maculata John C. Roos 1937-5-21 2066 Orange Orange Comment
  CLARK-A1528-7766  Euphorbia maculata John C. Roos, Lucille Roos 1951-7-28 5066 San Bernardino Redlands 365 Comment
  RSA92337  Euphorbia ocellata subsp. ocellata J. C. Roos, L. Roos 1954-6-28 6180 Inyo North base of sand dunes at SE end of Eureka Valley 915 Comment
  UCR23560  Euphorbia polycarpa John C. Roos 1965-6-23 s.n. Riverside Sonoran (Colorado) Desert, Cactus City, just east of the Mecca Hills on Interstate Hwy 10 [and 25 mi. east of Indio]. 500 Comment
  CLARK-A1528-2710  Euphorbia setiloba John C. Roos 1947-11-1 Riverside Eagle Mountains Comment
  RSA659663  Euphorbia setiloba J. C. Roos 1947-11-1 3756 Riverside On the edge of Lost Palms wash, Eagle Mtns. Comment
  CLARK-A1528-4429  Fagonia laevis John C. Roos 1949-5-5 4095 Riverside Orocopia Mountains Comment
  UCR25380  Fagonia pachyacantha John C. Roos, Lucille Roos 1949-4-6 4146 Riverside Sonoran (Colorado) Desert, Canyon in the Orocopia Mountains, 2.5 mi. NE of Dos Palmas Spring 152 Comment
  SD52861  Fendlerella utahensis J. C. Roos 1955-7-21 6486 Inyo On rocky north slope, Whitetop Peak, summit; Last Chance Mountains. 2530 Comment
  OBI33597  Festuca arundinacea John C. Roos 1950-7-24 4822 Kern Shafter, along edge of building Comment
  CLARK-A1528-7875  Festuca californica John C. Roos 1951-6-9 5061 San Bernardino San Bernardino Mountains 1767 Comment
  UCR25371  Festuca californica var. parishii John C. Roos, L. Roos 1951-6-9 5061 San Bernardino San Bernardino Mtns., Fredalba 1768 Comment
  UCR20530  Festuca grayi John C. Roos 1952-4-9 5482 Riverside Hill by Fairmont Park, Riverside 259 Comment
  UCR25199  Festuca grayi John C. Roos, L. Roos 1951-6-9 5060 San Bernardino San Bernardino Mtns., Fredalba 1768 Comment
  UCR30532  Festuca microstachys John C. Roos 1939-4-15 318 Napa North Coast Range, Pope Valley, [near] Pacific Union College, Angwin 240 Comment
  UCR24032  Festuca occidentalis John C. Roos 1942-7-1 1268 Mariposa Sierra Nevada Mtns, Yosemite National Park, between Nevada and Vernal Falls Comment
  CLARK-A1528-4662  Festuca octoflora John C. Roos 1950-4-26 4765 San Bernardino Lucerne Valley 883 Comment
  RSA415964  Festuca rubra J. C. Roos, Steve Boyd 1965-7-31 s.n. San Bernardino South Fork Meadows, San Bernardino Mountains. 2287 Comment
  RSA85099  Filago californica J. C. Roos 1952-4-9 5510 Riverside Scattered along dry sunny roadside with Avena barbata, Muhlenbergia microsperma, etc., southeast face Mt. Rubidoux. 335 Comment
  UCR30565  Filago californica John C. Roos 1950-5-6 4786 Riverside Peninsular Range; Santa Ana Mtns., Head of Hagador Canyon, south of Corona 1037 Comment
  UCR19187  Filago depressa John C. Roos 1950-5-13 4804 San Bernardino Southern Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  UCR23794  Filago depressa John C. Roos 1959-3-28 s.n. San Bernardino Mojave Desert, 2-5 mi north of Kramer Junction 808 Comment
  UCSB37892  Fimbristylis thermalis Roos, J.; Roos, Lucille 1951-8-25 San Bernardino Arrowhead Hot Springs; San Bernardino Mtns. 609 Comment
  CLARK-A1528-3288  Forestiera neomexicana John C. Roos 1937-8-11 22 Los Angeles Lancaster Comment
  POM251787  Forestiera pubescens J. C. Roos 1937-8-11 22 Los Angeles W of Lancaster, Mojave Desert Comment
  RSA47537  Forsellesia nevadensis J. C. Roos, L. Roos 1979-06 4402 San Bernardino SE foot of Clark Mtn, Eastern San Bernardino County 1951 Comment
  RSA104136  Forsellesia nevadensis J. C. Roos, L. Roos 1955-4-11 6321 Inyo E side of Inyo Mts. near Loretoo Mine Comment
  CLARK-A1528-5248  Frankenia grandifolia var. campestris John C. Roos 1937-5-23 2342 Riverside Riverside Comment
  CAS-BOT-BC211669  Frankenia salina John C. Roos 1950-8-19 4941 San Diego Torrey Pines Park beach 4 Comment
  CLARK-A1528-1310  Frasera albomarginata John C. Roos 1950-9-2 4967 San Bernardino Clark Mountains 1706 Comment
  RSA86874  Frasera albomarginata J. C. Roos 1950-9-2 4967 San Bernardino Clark Mountains, 1 mile south of coliseum Mine 1707 Comment
Read comments
Sep 5 2013
  UCR23695  Frasera albomarginata John C. Roos 1949-6-20 4419 San Bernardino Eastern Mojave Desert, New York Mountains, Keystone Canyon 1738 Comment
  UCR26262  Frasera puberulenta John C. Roos 1967-8-5 s.n. Inyo Northern Mojave Desert, Inyo Mountains, 1 mi. east of Badger Flat on the summit ridge 3201 Comment
  CLARK-A1528-5365  Fraxinus anomala John C. Roos 1948-9-18 San Bernardino Clark Mountain Comment
  UCR23283  Galinsoga parviflora John C. Roos 1950-11-5 5024 San Bernardino San Bernardino Valley, Near corner of Central and Anderson, Loma Linda 335 Comment
  UCR23796  Galinsoga parviflora John C. Roos 1968-9-7 s.n. San Bernardino San Bernardino Mtns., Lake Arrowhead Village 1524 Comment
  UC1042974  Galinsoga parviflora var. parviflora John C. Roos 1954-5-11 6116 San Bernardino corner of Central and Anderson; Loma Linda 320 Comment
  CLARK-A1528-3942  Galium andrewsii John C. Roos 1937-6-8 2385 San Diego Warner Springs Comment
  CLARK-A1528-4048  Galium angustifolium John C. Roos 1937-7-20 485 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-7881  Galium angustifolium subsp. angustifolium John C. Roos 1948-5-8 3819 Riverside Whitewater Canyon 548 Comment
  RSA309655  Galium angustifolium subsp. gabrielense J. C. Roos 1967-7-15 s.n. San Bernardino Ridge between south and north fork of Mission Creek 2591 Comment
  UCR31683  Galium angustifolium subsp. gabrielense John C. Roos 1967-7-15 s.n. San Bernardino San Bernardino Mtns., ridge between South and North Forks of Mission Creek 2591 Comment
  RSA0051246  Galium hilendiae subsp. carneum John Roos, Lucille Roos 1947-7-14 2855 Inyo North slope Baldy Peak, Panamint Mts. 2560 Comment
  CAS-BOT-BC217583  Galium hypotrichium subsp. tomentellum J. C. Roos 1965-7-10 s.n. Inyo South slope of Telescope Peak, near peak, Panamint Mountains Comment
  CAS-BOT-BC223145  Galium johnstonii J. C. Roos 1965-7-17 s.n. San Bernardino Kilpecker Creek, San Bernardino Mtns. Comment
  UCR23486  Galium johnstonii John C. Roos 1965-7-17 s.n. San Bernardino San Bernardino Mtns, Kilpecker Creek Comment
  UCR23493  Galium munzii subsp. munzii John C. Roos 1949-6-21 4433 San Bernardino Eastern Mojave Desert, New York Mtns, Keystone Canyon 1829 Comment
  CLARK-A1528-5726  Galium parvifolium John C. Roos 1937-7-16 484 Los Angeles San Gabriel Mountains Comment
  RSA450248  Galium stellatum J. C. Roos, L. Roos 1955-4-6 6293 Inyo Near the mouth of Craig Canyon, on the east base of the Inyo Mtns, Saline Valley, 503 Comment
  CLARK-A1528-3955  Galium stellatum subsp. eremicum John C. Roos 1938-4-15 496 Inyo Darwin Falls Comment
  RSA0021848  Galium trifidum subsp. columbianum J. C. Roos 1937-7-19 378 San Bernardino 2 miles south of San Bernardino. Comment
  CLARK-A1528-2936  Garrya flavescens John C. Roos 1947-3-15 3336 Riverside San Jacinto Mountains 1066 Comment
  UCR23627  Gaultheria shallon John C. Roos, D. V. Hemphill 1957-7-1 6633 Mendocino Albion 6 Comment
  CLARK-A1528-3301  Gaura sinuata John C. Roos 1949-10-8 4689 San Bernardino Jurupa Hills 304 Comment
  POM263082  Gayophytum diffusum subsp. parviflorum J. C. Roos 1937-7-26 353 San Bernardino Bear Valley, San Bernardino Mountains. Comment
  POM265812  Gayophytum diffusum subsp. parviflorum J. C. Roos 1937-8-18 2529 Riverside Round Valley, San Jacinto Mountains. 2744 Comment
  UC1117607  Gayophytum diffusum subsp. parviflorum J. C. Roos 1955-6-21 6463 Inyo 2 mi ne Willow Spring; Last Chance Mountains 1950 Comment
  UCR23532  Gayophytum diffusum subsp. parviflorum John C. Roos 1937-8-18 2529 Riverside San Jacinto Mtns, Round Valley 2744 Comment
  CLARK-A1528-5431  Gentiana amarella John C. Roos 1946-9-4 2971 San Bernardino San Bernardino Mountains 2438 Comment
  CLARK-A1528-2949  Gentiana amarella John C. Roos 1968-9-21 San Bernardino San Bernardino Mountains 2590 Comment
  CLARK-A1528-2950  Gentiana amarella John C. Roos 1966-8-6 San Bernardino San Bernardino Mountains 2438 Comment
  UCR26249  Gentiana aquatica John C. Roos 1937-7-21 1997 San Bernardino San Bernardino Mtns, South Fork of Santa Ana River 1921 Comment
  UCR26248  Gentianopsis simplex John C. Roos 1937-7-21 1996 San Bernardino San Bernardino Mtns, South Fork of Santa Ana River 1921 Comment
Read comments
Oct 26 2013
  RSA450236  Geranium robertianum A. R. Roos 1958-6-3 s.n. Los Angeles Evans-Reeves Nursery, Brentwood, West Los Angeles. Comment
  RSA450434  Geum macrophyllum J. C. Roos 1965-7-31 s.n. San Bernardino South Fork 2134 Comment
  UCR18924  Geum macrophyllum John C. Roos 1965-7-31 s.n. San Bernardino San Bernardino Mtns, South Fork Meadows on the upper Santa Ana River in the San Gorgonio Wilderness Area 2622 Comment
  RSA659510  Gilia angelensis J. C. Roos, L. Roos 1954-4-17 6069 Riverside Pass at summit of Reche Canyon. 732 Comment
  UCR26283  Gilia angelensis John C. Roos 1952-4-23 5578 Riverside Box Springs Mtns, 1 yr old burn, north side of mtns 457 Comment
  RSA92546  Gilia angelensis J. C. Roos, Lucille Roos 1954-4-17 6069 Riverside Pass at summit of Reche Canyon. 732 Comment
  HSC78535  Gilia australis J. C. Roos 1948-5-22 3868 San Bernardino San Timoteo Canyon, S of Redlands 457 Comment
  CLARK-A1528-5115  Gilia congesta John C. Roos 1953-8-7 5929 Inyo Inyo Mountains 2682 Comment
  CLARK-A1528-3509  Gilia latifolia John C. Roos 1949-3-5 4092 Riverside Orocopia Mountains Comment
  UCSB41132  Gilia leptantha subsp. leptantha Roos, John 1961-9-30 San Bernardino San Bernardino Mtns., Cieniega Seca Creek 2346 Comment
  CAS-BOT-BC523866  Gilia modocensis J. C. Roos 1955-6-17 6394 Inyo 2 mi NE of Willow Spring, Last Chance Mountains 2011 Comment
  RSA155721  Gilia ophthalmoides J. C. Roos 1955-6-17 6393 Inyo 2 miles north of Willow Spring, Last Chance Mountains. 2011 Comment
  UCR26195  Gilia ophthalmoides John C. Roos, L. Roos 1954-5-9 6110 Inyo Northern Mojave Desert, Panamint Mtns., Mahogany Flat 2470 Comment
  RSA659467  Gilia ophthalmoides J. C. Roos, L. Roos 1954-5-9 6110 Inyo Mahogany Flat, Panamint Mountains. 2470 Comment
  UC1234683  Gilia ophthalmoides J. C. Roos 1955-7-22 6501 Inyo at junction of Eureka Valley and Saline Valley Roads (crest of Inyo Mountains); crest of Inyo Mountains 2240 Comment
  CLARK-A1528-3514  Gilia sinuata John C. Roos, Lucille Roos 1949-6-27 4516 San Bernardino Kingston Mountains 2072 Comment
  RSA92719  Gilia sinuata J. C. Roos, L. Roos 1952-5-10 5626 San Bernardino Kremer Hills {Kramer Hills} 854 Comment
  CLARK-A1528-3517  Gilia splendens subsp. splendens John C. Roos 1937-7-20 2366 San Bernardino San Bernardino Mountains Comment
  UCR25678  Gilmania luteola John C. Roos 1947-4-20 3502 Inyo Death Valley National Monument; at Zabriskie Point Comment
  RSA92591  Githopsis diffusa subsp. diffusa J. C. Roos 1952-5-24 5710 Riverside Burn on hills north of Moreno. 503 Comment
Read comments
May 20 2011
  UC1080632  Glossopetalon spinescens John and Lucille Roos 1955-4-11 6321 Inyo near Loretto Mine (e side of mts.); Inyo Mts. 1706 Comment
  CLARK-A1528-4676  Glyceria elata John C. Roos 1941-8-2 85 Riverside San Jacinto Mountains Comment
  UCR24009  Glyceria elata John C. Roos 1965-7-3 s.n. Riverside San Jacinto Mtns., Dark Canyon, north fork of the San Jacinto River Comment
  UCSB45536  Glyceria elata Roos, John 1955-7-2 Sonoma Miller Ridge Comment
  POM263016  Glyceria striata J. C. Roos 1937-7-21 419 San Bernardino South Fork Santa Ana Comment
  POM263088  Glyceria striata J. C. Roos 1937-7-29 413 San Bernardino Bluff Lake, San Bernardino Mountains. Comment
  RSA89959  Gnaphalium canescens J. C. Roos 1950-10-21 5014 Riverside Wonderland of Rocks [Joshua Tree National Park] 1220 Comment
  CLARK-A1528-7803  Gnaphalium palustre John C. Roos 1952-6-8 5742 Riverside Reche Canyon 640 Comment
  CAS-BOT-BC314521  Guizotia J. C. Roos 1955-7-2 6473 San Diego Escondido 182 Comment
  RSA0040194  Guizotia abyssinica John C. Roos 1955-7-2 6473 San Diego Escondido. 182 Comment
  RSA648085  Gutierrezia californica var. bracteata J. C. Roos 1940-9-2 222 Riverside New Jackrabbit trail. 3 or 4 mi. W of Beaumont. Comment
  UC1234844  Gutierrezia microcephala J. C. and A. R. Roos 1955-8-24 6540 Inyo 1.5 mi ne Willow Springs; Last Chance Mts. 1889 Comment
  CAS-BOT-BC308505  Gutierrezia sarothrae John Roos; Lucille Roos 1947-9-19 2802 Inyo Arcane Meadows, Panamint Mts. 2987 Comment
  CLARK-A1528-1866  Gutierrezia sarothrae John C. Roos 1941-8-17 54 Inyo Panamint Mountains 2804 Comment
  RSA450480  Gutierrezia sarothrae J. C. Roos 1965-6-21 s.n. Riverside the hills 2 miles S of Beaumont Comment
  UCSB45958  Gutierrezia sarothrae Roos, John 1966-8-6 San Bernardino Upper Fish Creek, San Bernardino Mtns. 2438 Comment
  CLARK-A1528-3383  Habenaria leucostachys John C. Roos 1936-7-30 953 San Bernardino San Bernardino Mountains Comment
  UC1010289  Halimolobos jaegeri J. C. and A. R. Roos 1950-8-6 4914 San Bernardino n face Kingston Peak (Kingston Mts., eastern Mohave Desert); eastern Mohave Desert, Kingston Mts., n face Kingston Peak 2164 Comment
  RSA79501  Halimolobos jaegeri J. C. Roos 1953-8-14 6024 Inyo Al Rose Canyon, Inyo Mts. 2500 Comment
  CLARK-A1528-1872  Haplopappus acradenius John C. Roos 1937-8-6 2445 Inyo Big Pine Comment
  CLARK-A1528-1876  Haplopappus brickellioides John C. Roos 1955-7-23 6513 Inyo Inyo Mountains 640 Comment
  CLARK-A1528-1884  Haplopappus cooperi John C. Roos 1943-5-22 2648 Riverside Little San Bernardino Mountains Comment
  CLARK-A1528-1887  Haplopappus gilmanii John C. Roos 1956-8-29 6597 Inyo Panamint Mountains Comment
  CLARK-A1528-1897  Haplopappus macronema John C. Roos 1955-8-26 6552 Inyo Inyo Mountains 3261 Comment
  CLARK-A1528-5602  Haplopappus macronema John C. Roos 1959-8-20 Inyo White Mountains 3047 Comment
  CLARK-A1528-1906  Haplopappus venetus John C. Roos 1949-10-1 4683 Orange Doheney Beach Comment
  CLARK-A1528-1894  Haplopappus venetus subsp. vernonioides John C. Roos 1951-9-24 5248 San Bernardino Loma Linda Comment
Read comments
Aug 20 2014
  RSA89986  Hedeoma nana subsp. californica J. C. Roos 1950-9-3 4977 San Bernardino South of Clark Mountains, NW of Mountain Pass 1829 Comment
  CAS-BOT-BC306311  Hedypnois cretica J. C. Roos 1956-5-5 6577 San Diego Marlborough and Adams, San Diego Comment
  UC1506469  Hedypnois rhagadioloides A. R. Roos 1954-5-17 Los Angeles in roadside parking strips near North Kenmore and Oakdale Streets; Hollywood 91 Comment
  UCR23817  Helenium puberulum John C. Roos 1940-6-23 1894 San Bernardino San Bernardino Valley, Rattlesnake Mountain above Reche Canyon near Loma Linda. Comment
  RSA0057845  Heleochloa schoenoides J. C. Roos 1969-11-22 Riverside Quail Lake at the south end of Jack Rabbit Trail. Prostrate in the mud at the border of a receding winter-flood lake. Growing in the lake bed. San Jacino Valley, east of Moreno. 426 Comment
  CLARK-A1528-2606  Helianthemum scoparium John C. Roos 1965-6-30 Riverside Santa Ana Mountains Comment
  UC1010226  Helianthus annuus J. C. and A. R. Roos 1950-8-7 4928 Inyo Tecopa Hot Springs 426 Comment
  UC1495798  Helianthus annuus J. C. Roos 1950-4-7 4728 Inyo at Tecopa Tecopa 426 Comment
Read comments
Sep 29 2010
  CLARK-A1528-1939  Helianthus annuus subsp. jaegeri John C. Roos 1950-4-7 4728 Inyo Tecopa 426 Comment
  CLARK-A1528-5520  Helianthus annuus subsp. jaegeri John C. Roos 1950-4-7 4728 Inyo Tecopa 426 Comment
  UCR23822  Helianthus bolanderi John C. Roos 1956-8-4 6592 Santa Barbara 2 mi S.E. of Figueroa Mtn., along Mission Pine rd. 1220 Comment
  UC1042977  Helianthus ciliaris John and Lucille Roos 1954-6-5 6124 San Bernardino near corner of Richardson and Gould Streets (ne of Loma Linda); San Bernardino Valley 304 Comment
  RSA44918  Helianthus ciliaris J. C. Roos 1947-6-20 3684 San Bernardino Old grain feild, Richardson St. near Zanja, Loma Linda Comment
  CLARK-A1528-1912  Helianthus niveus subsp. canescens John C. Roos 1962-4-3 Riverside Palm Springs Municipal Airport 121 Comment
  POM444679  Helianthus petiolaris J. C. Roos 1965-6-20 s.n. San Bernardino Ontario: Vineyard Comment
  RSA74572  Helianthus petiolaris subsp. petiolaris J. C. Roos, L. Roos 1951-9-9 5199 San Bernardino Along dry roadside and in vineyard, with Tribulus terrestris and Salsola Kali var. tennifolia. Hwy 99 at Etiwanda Ave. between Ontario and Fontana 305 Comment
  RSA92554  Helianthus petiolaris subsp. petiolaris J. C. Roos, L. Roos 1954-4-30 6071 San Bernardino Corner of Etiwanda Ace. and Highway 99 between Ontario & Fontana. 305 Comment
  CLARK-A1528-1916  Hemizonia arida John C. Roos 1969-5-10 Kern Red Rock Canyon Comment
  RSA450490  Hemizonia floribunda J. C. Roos 1965-10-10 s.n. San Diego 8 mi SE of Dulzura. Comment
  CLARK-A1528-1920  Hemizonia kelloggii John C. Roos 1965-6-27 Riverside Reche Canyon Comment
  CLARK-A1528-1921  Hemizonia kelloggii John C. Roos 1952-5-26 5713 Riverside Reche Canyon 457 Comment
  RSA450310  Heracleum maximum J. C. Roos 1965-7-31 s.n. San Bernardino South Fork Meadows, upper Santa Ana River, San Bernardino Mtns. 2287 Comment
  RSA0080078  Hesperochloa kingii J. C. Roos 1940-8-10 1842 San Bernardino South fork of Santa Ana River. 1981 Comment
  UCSB37782  Hesperostipa comata subsp. intermedia Roos, John 1965-7-18 San Bernardino Moonridge, Bear Valley, San Bernardino Mtns. Comment
  CLARK-A1528-1928  Heterotheca grandiflora John C. Roos 1951-9-19 5224 San Bernardino Loma Linda 335 Comment
  RSA0075939  Heterotheca sessiliflora J. C. Roos, Lucille Roos 1950-8-19 4938 San Diego Torrey Pines beach. 5 Comment
  CAS-BOT-BC310856  Heterotheca sessiliflora subsp. fastigiata J. C. Roos 1965-9-11 s.n. San Bernardino In Mill Creek Canyon, San Bernardino Mtns. Comment
  RSA0063277  Heuchera parishii J. C. Roos 1941-8-27 40 San Bernardino Greyback Ridge. 3354 Comment
  CAS-BOT-BC425019  Heuchera parvifolia John Roos; Lucille Roos 1952-7-30 5874 Mono Crooked Creek, White Mts. 3078 Comment
  CLARK-A1528-4093  Heuchera rubescens John C. Roos, Lucille Roos 1954-6-29 7150 Inyo Inyo Mountains 2179 Comment
  UCR24413  Heuchera rubescens John C. Roos 1965-7-10 s.n. Inyo NE slope of Telegraph Peak, Panamint Mtns 3049 Comment
  UCR26259  Hibiscus trionum John C. Roos 1967-7-16 s.n. San Bernardino San Bernardino Valley, Loma Linda. 320 Comment
  CLARK-A1528-2785  Hoffmannseggia microphylla John C. Roos 1949-3-19 4108 Riverside Mecca Comment
  CLARK-A1528-1946  Holocarpha heermannii John C. Roos 1965-8-21 Tulare Oakwoodland Comment
  RSA71398  Hordeum brachyantherum J. C. Roos, L. Roos 1951-8-11 5170 Mono Campito Meadow, White Mts. 3323 Comment
  UCSB45952  Hordeum brachyantherum subsp. brachyantherum Roos, John 1965-7-18 San Bernardino Big Bear Lake, San Bernardino Mtns. Comment
  CAS-BOT-BC284942  Hordeum brachyantherum subsp. californicum J. C. Roos 1965-7-18 s.n. San Bernardino Big Bear Lake, San Bernardino Mtns. Comment
  CLARK-A1528-4687  Hordeum californicum John C. Roos 1940-8-3 1583 San Bernardino San Bernardino Mountains Comment
  UCSB45577  Hordeum depressum Roos, John 1952-4-22 San Bernardino Waterman Ave. west of Loma Linda, San Bernardino Valley 304 Comment
  CLARK-A1528-4689  Hordeum glaucum John C. Roos 1952-4-9 5494 Riverside Riverside 304 Comment
  UCR26284  Hordeum intercedens John C. Roos 1952-4-23 5571 Riverside Perris-Aguanga Basin region, 1 mi SE of Perris 427 Comment
  RSA425020  Hordeum jubatum J. C. Roos 1965-7-18 s.n. San Bernardino Bear Valley, San Bernardino Mtns. Near Fawnskin. Comment
  RSA45206  Hordeum jubatum J. C. Roos, L. Roos 1949-5-14 4306 San Bernardino Lucerne Valley 884 Comment
  RSA659629  Hordeum jubatum J. C. Roos 1965-7-18 s,n, San Bernardino Bear Valley, San Bernardino Mtns. Comment
  CLARK-A1528-3999  Horkelia bolanderi subsp. parryi John C. Roos 1937-7-21 Roos No. 2374 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4001  Horkelia hispidula John C. Roos, Lucille Roos 1952-7-28 Roos No. 5856 Inyo White Mountains 3200 Comment
  RSA71739  Horkelia hispidula J. C. Roos, L. Roos 1952-7-28 5856 Inyo White Mountains; head of Wyman Canyon 3201 Comment
  RSA659183  Horkelia wilderae J. C. Roos 1965-7-26 s.n. San Bernardino Upper Santa Ana Basin, near Fish Creek, San Bernardino Mtns. 2134 Comment
  UCR23501  Horkelia wilderae John C. Roos 1955-8-20 6505 San Bernardino San Bernardino Mtns, Barton Flats. Near Barton Creek 1890 Comment
  CLARK-A1528-5143  Horsfordia newberryi John C. Roos 1949-4-6 4151 Imperial Chocolate Mountains 121 Comment
  UCR23776  Hulsea californica John C. Roos 1937-6-15 2504 San Diego Peninsular Range, Peak above Cuyamaca Lake Comment
  CLARK-A1528-1953  Hulsea vestita John C. Roos 1937-7-16 2469 Los Angeles San Gabriel Mountains 2895 Comment
  POM261409  Hulsea vestita subsp. pygmaea J. C. Roos 1941-8-27 35 San Bernardino San Gorgonio Mtn 3354 Comment
  CLARK-A1528-5521  Hymenoclea monogyra John C. Roos 1947-10-11 3747 San Bernardino Fontana Power Plant Comment
  RSA44858  Hymenoclea monogyra J. C. Roos 1947-10-11 3747 San Bernardino Fontana Power Plant; NorthWest of Rialto. Comment
  CLARK-A1528-1962  Hymenoclea salsola Alfred R. Roos 1937-3-26 Kern Maricopa Comment
  CLARK-A1528-1966  Hymenopappus filifolius var. lugens John C. Roos 1965-7-18 San Bernardino San Bernardino Mountains Comment
  UCR23774  Hymenopappus filifolius var. lugens John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, east end of Bear Valley Comment
  RSA79702  Hymenopappus filifolius var. nanus J. C. Roos 1953-8-9 5950 Inyo Tamarack Canyon. 2988 Comment
Read comments
Aug 3 2010
  RSA47476  Hymenoxys cooperi J. C. Roos, L. Roos 1949-6-20 4418 San Bernardino Keystone Canyon, New York Mts 1829 Comment
  CLARK-A1528-1003  Hymenoxys odorata John C. Roos 1949-4-8 4199 Imperial 60 Comment
  CLARK-A1528-5163  Hymenoxys odorata John C. Roos 1949-4-8 4199 Imperial 60 Comment
  CLARK-A1528-2977  Hypericum anagalloides John C. Roos 1937-7-22 1167 San Bernardino San Bernardino Mountains Comment
  CAS-BOT-BC401451  Hypericum scouleri J. C. Roos 1966-8-13 s.n. San Bernardino San Bernardino Mtns. Along the stream at Fish Creek 2316 Comment
  UCD133369  Hypochaeris glabra J. C. Roos 1948-4-29 2901 San Bernardino carpenters tract in Loma Linda. 335 Comment
  UCR26096  Hypochaeris glabra John C. Roos 1948-4-29 2909 San Bernardino San Bernardino Valley, carpenters tract in Loma Linda 335 Comment
  POM263012  Hypochaeris radicata J. C. Roos 1938-6-6 471 San Bernardino Loma Linda, in lawn, San Bernardino Valley. Comment
  UCR23378  Impatiens balfourii John C. Roos, L. Roos 1957-6-22 6615 San Bernardino San Bernardino Valley, Zanja Creek at Mentone Health Haven, east of Mentone 549 Comment
  UCR23390  Impatiens balfourii John C. Roos 1957-7-13 6655 San Bernardino San Bernardino Valley, Mentone. Along Zanja Creek Comment
  UCSB46875  Impatiens balfourii Roos, John 1957-7-13 San Bernardino Mentone; along the Zanja Creek Comment
  RSA0010545  Impatiens balfourii J. C. Roos 1957-7-13 6655 San Bernardino Mentone. Comment
  CAS-BOT-BC274063  Imperata brevifolia J. C. Roos 1938-11-5 s.n. San Bernardino Arrowhead Hot Springs, on the south side of the San Bernardino Mtns. Comment
  POM431209  Imperata brevifolia J. C. Roos 1938-11-5 s.n. San Bernardino Arrowhead Hot Springs, south side of San Bernardino Mountains. Comment
  UCR23284  Imperata brevifolia John C. Roos 1950-1-20 5031 San Bernardino San Bernardino Mtns, Arrowhead Hot Springs 610 Comment
  CLARK-A1528-3525  Ipomopsis aggregata John C. Roos 1949-5-29 4378 San Bernardino Comment
  UCR24232  Ipomopsis polycladon John C. Roos, E. C. Jaeger 1955-7-22 6502 Inyo Northern Mojave Desert, Inyo Mtns., at junction of Eureka Valley and Saline Valley roads 2241 Comment
  UCR23334  Isoetes occidentalis John C. Roos 1965-8-27 s.n. Fresno Sierra Nevada Mountains, Rae Lakes 3201 Comment
  CLARK-A1528-2388  Isomeris arborea var. globosa John C. Roos 1937-3-26 1323 Kern Comment
  CLARK-A1528-1972  Iva acerosa John C. Roos 1965-7-11 Inyo Tecopa Comment
  RSA444488  Iva acerosa J. C. Roos 1950-8-7 s.n. Inyo Tecopa. Comment
  RSA47293  Ivesia jaegeri J. C. Roos 1949-6-24 4478 San Bernardino North side of Clark Mountains 2287 Comment
  RSA47450  Ivesia patellifera J. C. Roos 1949-6-27 4504 San Bernardino North side of Kingston Mountains 1829 Comment
  POM263544  Ivesia pygmaea J. C. Roos 1937-8-8 538 Inyo Lone Pine Canyon. 3049 Comment
  UCR23505  Ivesia santolinoides John C. Roos 1947-6-21 3689 San Bernardino San Bernardino Mtns, Running Springs 1838 Comment
  UCR26180  Jamesia americana John C. Roos 1956-9-29 6602 Inyo Panamint Mtns, Head off Death Valley Canyon Comment
  CLARK-A1528-4103  Jamesia americana subsp. californica John C. Roos 1965-8-9 Inyo Independence Creek Comment
  POM274221  Jamesia americana var. rosea J. C. Roos 1947-7-14 2848 Inyo Panamint Mountains, north slope of Baldy Peak 2744 Comment
  UCR24414  Jepsonia parryi John C. Roos 1936-10-9 2301 Orange Santa Ana Canyon Comment
  UCR24416  Jepsonia parryi John C. Roos 1955-3-26 6280 San Diego Peninsular Range, Moosa Canyon near dam, along Hwy 395, 10 miles north of Escondido 152 Comment
  CLARK-A1528-5054  Juncus acutus var. sphaerocarpus John C. Roos 1948-5-15 3855 Riverside Eagle Mountains Comment
  CLARK-A1528-2666  Juniperus californica John C. Roos 1947-2-15 3265 Riverside Eagle Mountains Comment
  UCR18947  Juniperus communis var. saxatilis John C. Roos 1948-9-7 3998 Tuolumne Sierra Nevada Mtns., Yosemite, Tioga Pass 2744 Comment
  RSA450181  Juniperus osteosperma J. C. Roos 1950-8-4 s.n. San Bernardino N side of Clark Mountain, east Mojave Desert. Comment
  UCR26312  Juniperus osteosperma John C. Roos 1949-9-2 4634 San Bernardino Eastern Mojave Desert, north slope of the Kingston Range 2073 Comment
  CLARK-A1528-4430  Kallstroemia californica John C. Roos 1963-10-24 Riverside Hayfield Comment
  UCR26258  Kallstroemia californica John C. Roos 1963-10-24 s.n. Riverside Sonoran (Colorado) Desert, Hayfield, Colorado Desert 427 Comment
  SEINET226238 Image available Kallstroemia parviflora A. R. Roos 1950-8-4 San Bernardino North side of Clark Mountain, eastern Mojave Desert. Comment
  UCR23568  Kalmia polifolia John C. Roos 1965-8-8 s.n. Fresno Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park 3354 Comment
  CLARK-A1528-4278  Keckiella cordifolia John C. Roos, Lucille Roos 1952-6-24 5786 Riverside Beaumont 731 Comment
  UCR19057  Keckiella lemmonii John C. Roos 1948-8-31 3927 Shasta Canyon side along Sacramento River 915 Comment
  CLARK-A1528-1224  Keckiella rothrockii Alfred R. Roos, John C. Roos 1953-8-10 5980 Inyo Inyo Mountains 2529 Comment
  UCR24469  Keckiella rothrockii subsp. jacintensis John C. Roos 1937-8-18 2534 Riverside San Jacinto Mtns, Hidden Lake Comment
  POM261205  Keckiella rothrockii subsp. rothrockii J. C. Roos 1941-8-17 64 Inyo Wildroe Canyon, Panamint Mtns. Comment
  RSA79644  Keckiella rothrockii subsp. rothrockii J. C. Roos, A. R. Roos 1953-8-10 5980 Inyo Inyo Mountains, branch of Mazourka Canyon. 2530 Comment
  NY790409  Keckiella rothrockii var. rothrockii J. C. Roos 1953-8-10 5980 Inyo Branch of Mazourka Canyon, Inyo Mountains 2529.8 Comment
  CLARK-A1528-3962  Kelloggia galioides John C. Roos 1937-7-22 1172 San Bernardino San Bernardino Mountains Comment
  CAS-BOT-BC110320  Kochia americana John Roos; Lucille Roos 1947-7-15 2866 Inyo Darwin Mesa. 1524 Comment
  UCR24209  Kochia californica John C. Roos 1947-9-18 2790 Los Angeles Western Mojave Desert, 2 mi north of Lancaster 710 Comment
  CLARK-A1528-4699  Koeleria macrantha John C. Roos 1952-4-29 5598 Riverside Reche Canyon 457 Comment
  CLARK-A1528-4700  Koeleria macrantha John C. Roos, Alfred R. Roos 1954-6-12 6134 Inyo Panamint Range 2651 Comment
  CLARK-A1528-4701  Koeleria macrantha John C. Roos 1947-7-11 2847 Inyo Panamint Range 2377 Comment
  RSA79654  Koeleria macrantha J. C. Roos, A. R. Roos 1953-8-9 5948 Inyo Tamarack Canyon, Inyo Mts. 2774 Comment
  RSA0104244  Kopsiopsis strobilacea John C. Roos 1937-7-17 375 Los Angeles Near Telegraph Peak, San Gabriel Mts. Comment
  UCR19177  Krameria erecta John C. Roos 1965-6-13 s.n. Riverside Santa Rosa Mtns., Dos Palmas Spring Comment
  CLARK-A1528-3029  Krameria grayi John C. Roos 1948-4-24 3804 Riverside Whitewater Comment
  CLARK-A1528-5687  Krameria grayi John C. Roos 1937-4-23 796 Riverside Whitewater Comment
  CLARK-A1528-1359  Krameria parvifolia var. glandulosa John C. Roos 1948-5-15 3857 Riverside Eagle Mountains Comment
  RSA155656  Krascheninnikovia lanata J. C. Roos, A. Roos 1955-8-25 6547 Inyo Little Cowhorn Valley, Inyo Mts. 2188 Comment
  UCR24237  Langloisia matthewsii John C. Roos 1949-5-14 4297 San Bernardino Southern Mojave Desert, Pickaninny Buttes 915 Comment
  UCR19197  Langloisia punctata John C. Roos 1949-5-28 4355 San Bernardino Eastern Mojave Desert, wash near Green's Mine, north side Clark Mountain 1646 Comment
  CLARK-A1528-3536  Langloisia setosissima John C. Roos 1937-4-28 1654 San Bernardino Turtle Mountains Comment
  UCR25969  Lappula occidentalis John C. Roos 1965-7-11 s.n. Inyo Northern Mojave Desert, Panamint Mtns: Wildrose Canyon at and below the Charcoal Kilns 2134 Comment
  CLARK-A1528-4438  Larrea tridentata John C. Roos 1938-4-18 8719 Inyo Death Valley National Park Comment
  RSA450757  Lasthenia glabrata subsp. coulteri J. C. Roos 1966-3-8 s.n Riverside 1 mile N of Lakeview Comment
Read comments
May 21 2011
  UCR23937  Lasthenia glabrata subsp. coulteri John C. Roos 1937-4-23 2490 San Bernardino Southern Mojave Desert, Twentynine Palms 762 Comment
  POM262944  Lasthenia gracilis J. C. Roos 1941-4-19 178 Riverside Reche Canyon - 'Plateau' [Label indicates San Bernardino Co.] Comment
  CLARK-A1528-3229  Lavatera assurgentiflora Alfred R. Roos 1948-4-8 Los Angeles Culver City Comment
  UCR30568  Layia glandulosa John C. Roos 1949-5-28 4346 San Bernardino Eastern Mojave Desert, wash below Coloseum Mine, Clark Mountain 1616 Comment
  CLARK-A1528-1984  Layia platyglossa John C. Roos 1952-4-13 5525 Riverside Box Springs Mountains 487 Comment
  UCR23569  Ledum glandulosum var. californicum John C. Roos 1965-8-8 s.n. Fresno Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park 3354 Comment
  CLARK-A1528-4708  Leersia oryzoides John C. Roos 1951-10-14 5322 San Bernardino San Bernardino 304 Comment
  POM264170  Lemna gibba J. C. Roos 1937-7-26 657 San Bernardino Bear Lake, San Bernardino Mountains Comment
  UCR24205  Lemna trisulca John C. Roos 1942-11-28 2587 San Bernardino San Bernardino Mtns., Deep Creek 915 Comment
  POM266635  Lemna trisulca J. C. Roos 1937-7-30 2273 San Bernardino Deer Lick Spring, San Bernardino Mountains. Comment
  CLARK-A1528-2324  Lepidium fremontii John C. Roos 1937-4-23 2193 San Bernardino Twentynine Palms Comment
  RSA658697  Lepidium lasiocarpum J. C. Roos 1948-5-15 3841 Riverside Lost Palms Canyon, Eagle Mountains., Colorado Desert. Comment
  UCR20392  Lepidium lasiocarpum John C. Roos 1949-4-8 4189 Imperial Sonoran (Colorado) Desert, east end of Chocolate Mountains Comment
  UCR25952  Lepidium lasiocarpum John C. Roos 1947-2-15 3237 Riverside Sonoran (Colorado) Desert, Lost Palms Canyon, south face of Eagle Mtns., west of Hayfield Dry Lake 997 Comment
  UCR23441  Lepidium montanum John C. Roos 1949-6-22 4438 San Bernardino Eastern Mojave Desert, New York Mtns., at and near Lecyr Well 1524 Comment
  UCR25317  Lepidium nitidum John C. Roos 1939-3-18 s.n. Napa North Coast Range, Snell Valley, [near] Pacific Union College, Angwin 183 Comment
  CLARK-A1528-2327  Lepidium perfoliatum John C. Roos 1949-4-30 4259 San Bernardino Lucerne Valley Comment
  UCR23440  Lepidium virginicum John C. Roos 1950-6-24 4838 San Bernardino San Bernardino Mtns, Moonridge, Bear Valley 2226 Comment
  RSA85151  Lepidium virginicum var. robinsonii J. C. Roos 1952-4-9 5475 Riverside Fairmount Park 259 Comment
  CAS-BOT-BC329400  Lepidospartum latisquamum J. C. Roos 1955-8-24 6539 Inyo Near Willow Spring, Last Chance Mts. 1828 Comment
  RSA155663  Lepidospartum latisquamum J. C. Roos, A. R. Roos 1955-8-24 6539 Inyo Near Willow Spring; Last Chance Mts. 1829 Comment
  SD52996  Lepidospartum latisquamum J. C. Roos, A. R. Roos 1955-8-24 6539 Inyo Near Willow Spring, Last Chance Mountains. 1830 Comment
  UC1010305  Lepidospartum latisquamum John C. Roos 1950-9-3 4971 San Bernardino nw Mountain Pass (canyon on s slope Clark Mts., eastern Mohave Desert); eastern Mohave Desert, canyon on s slope Clark Mts. nw of Mo 1889 Comment
  UCSB49607  Lepidospartum latisquamum Roos, John 1951-7-30 Los Angeles Swartout Valley between Wrightwood and Big Pines, San Gabriel Mts. 1981 Comment
  CLARK-A1528-262  Lepidospartum squamatum John C. Roos 1951-10-14 5321 San Bernardino San Bernardino 304 Comment
  CLARK-A1528-1987  Lepidospartum squamatum var. palmeri John C. Roos 1942-10-23 2572 Riverside Morongo Valley 518 Comment
  UCR24008  Leptochloa filiformis John C. Roos 1965-9-5 s.n. Riverside Sonoran (Colorado) Desert, Blythe 76 Comment
  POM266612  Leptochloa fusca subsp. fascicularis J. C. Roos 1942-9-12 1732 Los Angeles Roosevelt Highway, Santa Monica. Comment
  UCR26336  Leptochloa uninervia John C. Roos 1946-9-6 2998 San Bernardino San Bernardino Valley, Near Loma Linda Comment
  CLARK-A1528-3532  Leptodactylon pungens John C. Roos 1965-6-26 San Bernardino San Bernardino Mountains Comment
  RSA79557  Leptosiphon nuttallii subsp. pubescens J. C. Roos, L. Roos 1953-8-11 5995 Inyo 2.5 miles east of Blue Bell Mine, Inyo Mts. 2866 Comment
  UCSB42106  Leptosiphon nuttallii subsp. pubescens Roos, John 1965-6-26 San Bernardino Barton Flats, San Bernardino Mtns. Comment
  RSA449969  Leptosiphon pygmaeus subsp. pygmaeus J. C. Roos 1950-4-22 4757 Riverside In the hills NE of the summit of Reche Canyon. 823 Comment
  UCR23439  Lesquerella kingii John C. Roos 1949-6-21 4425 San Bernardino Eastern Mojave Desert, New York Mtns, Keystone Canyon 1829 Comment
  CLARK-A1528-2331  Lesquerella kingii John C. Roos 1952-7-26 5821 Inyo White Mountains 3047 Comment
  UCR18767  Lesquerella kingii subsp. bernardina John C. Roos 1959-5-16 s.n. San Bernardino San Bernardino Mountains, Van Dusen Canyon, Bear Valley 2256 Comment
  UCR23438  Lesquerella tenella John C. Roos 1937-4-25 817 San Bernardino Eastern Mojave Desert, 6 mi. below Mitchell Caverns, Providence Mtns. 900 Comment
  UCR30561  Lessingia filaginifolia var. filaginifolia John C. Roos 1949-7-30 4586 San Diego Palomar Mountains, Palomar Mtns. 1529 Comment
  RSA47467  Lessingia glandulifera var. glandulifera J. C. Roos 1949-6-23 4458 San Bernardino Near Rock Springs, Mid-hills, New York Mountains. 1463 Comment
  CLARK-A1528-1994  Leucelene ericoides John C. Roos 1949-6-19 4398 San Bernardino Clark Mountain 1889 Comment
  RSA662420  Leucopoa kingii J. C. Roos 1937-7-7 408 San Bernardino South Fork (of Santa Ana River). San Bernardino Mtns. 1829 Comment
Read comments
Oct 26 2013
  CAS-BOT-BC444426  Lewisia rediviva var. minor John Roos; Lucille Roos 1950-7-27 5825 Inyo West side Reed Flat, White Mts. 3078 Comment
  CAS-BOT-BC274547  Leymus triticoides J. C. Roos 1965-6-16 s.n. San Bernardino Victorville 914 Comment
  UCSB51408  Leymus triticoides Roos, John 1965-7-18 San Bernardino East end of Bear Valley, San Bernardino Mtns. Comment
  UCR24468  Limosella aquatica John C. Roos 1946-10-5 3107 San Bernardino San Bernardino Mtns./Mojave Desert, The Pipes, desert slope on E side of San Bernardino Mtns north of Yucca Valley 1357 Comment
  UCR19166  Linanthus aureus John C. Roos 1942-5-2 1148 Riverside Mojave Desert, Joshua Tree Nat. Monument. Lost Horse Well Comment
  CLARK-A1528-3441  Linanthus breviculus John C. Roos 1945-6-27 3724 San Bernardino San Bernardino Mountains 2285 Comment
  CLARK-A1528-3468  Linanthus dianthiflorus John C. Roos 1937-3-17 2640 Los Angeles San Fernando Valley Comment
  CLARK-A1528-3471  Linanthus dianthiflorus John C. Roos 1937-2-23 1306 Orange Laguna Beach Comment
  UCR19164  Linanthus floribundus John C. Roos 1947-6-27 3716 San Bernardino San Bernardino Mountains, Stetson Creek drainage, Barton Flats 1890 Comment
  UCR19163  Linanthus liniflorus John C. Roos 1960-5-30 s.n. Riverside Peninsular Range/Santa Ana Mtns., ridge east of Sugarloaf [=Pleasants Peak] 1067 Comment
  CLARK-A1528-3483  Linanthus nuttallii John C. Roos 1949-6-23 4469 San Bernardino Cajon Pass 1219 Comment
  UCR30509  Linanthus nuttallii John C. Roos, A. R. Roos 1953-8-11 5995 Inyo Northern Mojave/Great Basin Desert, Inyo Mtns: 2-2.5 mi east of Blue Bell Mine 2866 Comment
  RSA659606  Lithophragma affine J. C. Roos, L. Roos 1954-4-17 6067 Riverside Canyon SE of summit of Reche Canyon. 686 Comment
  POM262972  Lithophragma affine subsp. mixtum J. C. Roos 1941-4-19 168 San Bernardino Reche Canyon. Comment
  POM265671  Lithophragma heterophyllum J. C. Roos 1942-4-18 1082 Los Angeles Santa Anita Canyon, San Gabriel Mts Comment
  POM301606  Lobelia dunnii var. serrata J. C. Roos 1937-7-5 1422 Ventura Wheeler Springs. Comment
  UCR23398  Lomatium John C. Roos 1939-3-18 302 Napa North Coast Range, Snell Valley, near Angwin 183 Comment
  UC1236232  Lomatium foeniculaceum subsp. fimbriatum John C. Roos 1955-5-15 6375 Inyo 2 mi. n.e. Willow Spring (Last Chance Mts., practically on CA-Nevada line); Last Chance Mts. 2072 Comment
  CAS-BOT-BC211140  Lomatium foeniculaceum subsp. inyoense J. C. Roos; A. R. Roos 1955-8-26 6554 Inyo Summit and north shoulder W ucoba [Waucoba] Mt., Inyo Mts. 3383 Comment
  CAS-BOT-BC211141  Lomatium foeniculaceum subsp. inyoense J. C. Roos; A. R. Roos 1953-8-9 5964 Inyo Upper Tamarack Canyon, Inyo Mts. 3108 Comment
  CLARK-A1528-1441  Lomatium inyoense John C. Roos 1954-6-24 6148 Inyo Inyo Mountains 3108 Comment
  CLARK-A1528-2431  Lomatium lucidum John C. Roos 1960-5-30 Orange Santa Ana Mountains 1066 Comment
  UCR23402  Lomatium nevadense John C. Roos 1967-5-30 s.n. San Bernardino San Bernardino Mtns, east of Broom Flat 2424 Comment
  RSA0076472  Lomatium parryi John C. Roos 1949-6-21 4427 San Bernardino Keystone Canyon, New York Mts. 1889 Comment
  RSA48692  Lonicera subspicata var. denudata J. C. Roos 1949-7-30 4595 San Diego North of Pala. Comment
  CLARK-A1528-4896  Lotus argophyllus subsp. decorus John C. Roos 1937-7-20 1179 San Bernardino Camp Angelus Comment
  RSA85446  Lotus argophyllus var. argophyllus J. C. Roos 1952-4-13 5522 Riverside Dry ridge on Box Springs Mtns. 488 Comment
  CLARK-A1528-2795  Lotus argyraeus subsp. multicaulis John C. Roos 1949-6-21 3556 San Bernardino New York Peak 2224 Comment
  RSA44271  Lotus argyraeus var. multicaulis J. C. Roos 1949-6-21 3556 San Bernardino New York Mountain (New York Peak) 2225 Comment
  UCR25909  Lotus argyraeus var. multicaulis John C. Roos 1949-6-21 3556 San Bernardino Eastern Mojave Desert, New York Mountains, near New York peak 2226 Comment
  UCR19001  Lotus corniculatus Alfred R. Roos 1961-7-5 s.n. San Bernardino San Bernardino Valley, Loma Linda 396 Comment
  UCR23900  Lotus formosissimus John C. Roos 1957-7-1 6632 Mendocino Albion Ridge 6 Comment
  UCR23901  Lotus grandiflorus John C. Roos 1947-6-27 3713 San Bernardino San Bernardino Mtns., Glen Martin 1738 Comment
  UCR25854  Lotus grandiflorus John C. Roos 1937-7-20 969 San Bernardino San Bernardino Mtns., Camp Angelus 1829 Comment
  UCR30812  Lotus micranthus John C. Roos 1939-4-16 315 Napa North Coast Range, Pacific Union College, Angwin, [Pope Valley] 240 Comment
  UCR23899  Lotus nevadensis var. nevadensis John C. Roos 1937-8-18 2541 Riverside San Jacinto Mtns., Near Willow Creek 2439 Comment
  RSA659193  Lotus oblongifolius J. C. Roos 1965-7-26 s.n. San Bernardino Upper Santa Ana Canyon, Heart Bar area. San Bernardino Mtns. Comment
  UC1234666  Lotus oblongifolius var. oblongifolius J. C. and A. R. Roos 1955-8-28 6566 Inyo 3 mi n Olancha (w side Owens Lake); Owens Lake 1091 Comment
  RSA662072  Lotus purshianus J. C. Roos 1965-6-16 s.n. Orange Dana Point near Doheney Beach. Comment
  CLARK-A1528-485  Lotus rigidus John C. Roos 1951-9-25 Riverside Pinyon Crest Comment
  CLARK-A1528-2809  Lotus strigosus John C. Roos 1937-3-24 1339 Riverside Pigeon Pass Comment
  RSA85587  Lotus strigosus J. C. Roos 1952-4-9 5479 Riverside Fairmount Park 259 Comment
  CLARK-A1528-2814  Lupinus arboreus John C. Roos 1937-7-1 1706 Santa Barbara Santa Ynez Mountains Comment
  UCR20426  Lupinus argenteus var. meionanthus John C. Roos 1947-7-13 2874 Inyo Northern Mojave Desert, Panamint Mtns: Telescope Peak 3293 Comment
  CLARK-A1528-2817  Lupinus arizonicus John C. Roos 1948-5-15 3847 Riverside Eagle Mountains Comment
  CAS-BOT-BC196829  Lupinus breweri var. grandiflorus J. C. Roos 1965-7-18 s.n. San Bernardino Bear Valley, San Bernardino Mtns. Comment
  RSA71762  Lupinus caespitosus J. C. Roos 1951-8-8 5108 Inyo Reed flat, White Mts. 3171 Comment
  CLARK-A1528-1154  Lupinus concinnus John C. Roos 1937-5-28 687 San Bernardino San Bernardino Mountains 1523 Comment
  RSA450115  Lupinus concinnus subsp. orcuttii J. C. Roos 1955-3-28 6281 San Diego 10 miles N of Excondido, Moosa Canyon near the dam. Hwy 395. 152 Comment
  CLARK-A1528-2825  Lupinus confertus John C. Roos 1946-8-29 2934 San Bernardino San Bernardino Mountains Comment
  POM263283  Lupinus densiflorus var. palustris J. C. Roos 1937-3-26 689 Kern East of Maricopa. Comment
  UCSB42216  Lupinus excubitus Roos, J. 1965-7-18 San Bernardino Along Bear Valley; San Bernardino Mtns. Comment
  UCSB42218  Lupinus excubitus Roos, J. 1965-6-6 San Bernardino Mill Creek; near Fallsvale; San Bernardino Mts. Comment
  RSA450113  Lupinus excubitus var. austromontanus J. C. Roos 1965-6-6 s.n. San Bernardino San Bernardino Mtns, Mill Creek near Fallsvale. Comment
  CLARK-A1528-2836  Lupinus formosus John C. Roos 1937-5-28 1704 San Bernardino San Bernardino Mountains Comment
  UCR23947  Lupinus formosus John C. Roos 1937-8-10 2522 Kern 12 mi N of Caliente 1903 Comment
  UCR30633  Lupinus formosus John C. Roos 1941-4-26 143 San Bernardino San Bernardino Valley, west of Colton 305 Comment
  UC1080597  Lupinus holmgrenianus John C. Roos 1955-5-15 6374 Inyo 2 mi ne Willow Spring (Last Chance Mts., almost on the Calif-Nevada State Line); Last Chance Mts., ne of Willow Spring 2042 Comment
  UCR31662  Lupinus lepidus var. confertus John C. Roos 1948-9-7 3991 Mono Eastern Sierra Nevada Mtns., Crestview 2326 Comment
  UC1010180  Lupinus lepidus var. utahensis John and Lucille Roos 1951-8-8 5108 Inyo Reed Flat White Mountains 3139 Comment
  UCR20303  Lupinus luteolus John C. Roos 1948-8-31 3933 Lake North Coast Range, Lakeport Comment
  CLARK-A1528-2847  Lupinus odoratus John C. Roos 1978-5-7 San Bernardino 853 Comment
  CLARK-A1528-2849  Lupinus shockleyi John C. Roos 1955-5-13 6360 Inyo Eureka Valley 1036 Comment
  RSA78224  Lupinus stiversii J. C. Roos, Lucille Roos, A. R. Roos 1951-5-27 5051 Mariposa Hills about 8 miles east o f Mariposa. 1006 Comment
  CLARK-A1528-4951  Lupinus truncatus John C. Roos 1948-4-24 3788 Riverside Cabazon Comment
  RSA450467  Lupinus truncatus J. C. Roos 1966-4-5 s.n. Riverside Winchester. Comment
Read comments
Mar 20 2011
  UCR24201  Luzula subsessilis John C. Roos 1940-7-19 1877 San Bernardino San Bernardino Mtns., Green Valley Comment
  CAS-BOT-BC231412  Lycium andersonii J. C. Roos 1966-2-12 s.n. Riverside 2 miles east of Desert Center Comment
  CLARK-A1528-4345  Lycium andersonii John C. Roos 1966-2-12 Riverside Chuckwalla Valley Comment
Read comments
May 21 2016
  CLARK-A1528-4352  Lycopersicon esculentum John C. Roos 1965-12-6 San Bernardino Loma Linda Comment
  POM301537  Lycopus americanus J. C. Roos 1937-8-24 1201 San Bernardino South of San Bernardino. Comment
  CLARK-A1528-3213  Lythrum californicum John C. Roos 1952-6-24 5787 San Bernardino San Bernardino 304 Comment
  CLARK-A1528-3215  Lythrum hyssopifolia John C. Roos 1937-6-13 1437 San Diego East San Diego Comment
  UCR19115  Lythrum hyssopifolia John C. Roos 1965-8-1 s.n. San Bernardino San Bernardino Valley, Loma Linda 305 Comment
  CLARK-A1528-7843  Machaeranthera arida John C. Roos 1949-6-26 3561 San Bernardino Mesquite Valley 792 Comment
  UCR24400  Machaeranthera canescens John C. Roos 1946-9-21 3080 San Bernardino San Bernardino Mtns, Bear Valley, east of Grout Bay 2043 Comment
  RSA425029  Machaeranthera carnosa J. C. Roos 1956-8-2 6591 San Bernardino San Bernardino Valley [Loma Linda] north side of Hwy 99, 0.2 miles west of Waterman Ave. Comment
  CLARK-A1528-2000  Machaeranthera cognata John C. Roos 1949-4-6 4138 Riverside Orocopia Mountains Comment
  RSA47474  Machaeranthera gracilis J. C. Roos, L. Roos 1949-6-18 4393 San Bernardino Mountain Pass, Clark Mountains 1524 Comment
  CLARK-A1528-1013  Machaeranthera tephrodes John C. Roos 1949-4-7 4175 Imperial Winterhaven 39 Comment
  CLARK-A1528-1098  Madia elegans John C. Roos 1937-7-18 401 San Bernardino San Antonio Canyon Comment
  UCR25294  Madia exigua John C. Roos 1957-7-2 6649 Sonoma Miller Ridge Comment
  CLARK-A1528-1024  Madia glomerata John C. Roos 1937-7-29 1981 San Bernardino San Bernardino Mountains 2316 Comment
  POM263489  Madia nutans J. C. Roos 1939-4-16 258 Napa Angwin. Comment
  UCR25181  Malacothamnus fremontii John C. Roos 1951-7-30 5072 Los Angeles San Gabriel Mtns., Big Rock Creek, north of Mt. Baden Powell 1982 Comment
  CAS-BOT-BC204183  Malacothamnus marrubioides J. C. Roos 1965-8-9 s.n. Inyo Independence Creek 2438 Comment
  CLARK-A1528-2010  Malacothrix saxatilis var. tenuifolia John C. Roos 1942-10-3 1739 Los Angeles Westwood Village Comment
  CAS-BOT-BC167853  Malosma laurina John Roos; Lucille Roos 1954-7-10 6191 Riverside North side Pigeon Pass, Box Springs Mts. 487 Comment
  CLARK-A1528-3231  Malva parviflora John C. Roos, Lucille Roos 1951-11-10 5349 San Bernardino Colton 304 Comment
  UCR26286  Malva parviflora John C. Roos 1951-11-10 5349 San Bernardino San Bernardino Valley, La Cadena Drive at Barton Road, south of Colton 30 Comment
  UCR19103  Malvella leprosa John C. Roos 1965-6-30 s.n. Riverside Perris-Aguanga Basin region, Perris Comment
  CLARK-A1528-571  Marrubium vulgare John C. Roos 1951-10-3 5315 San Bernardino Loma Linda 335 Comment
  RSA450079  Marsilea vestita J. C. Roos 1965-9-16 s.n. Riverside Lakeview. Comment
  CLARK-A1528-2011  Matricaria matricarioides John C. Roos 1966-3-24 Riverside Winchester Comment
  UCR19540  Matricaria matricarioides John C. Roos 1966-3-24 s.n. Riverside Winchester (near Hemet) 457 Comment
  POM266319  Matricaria matricarioides J. C. Roos 1942-3-23 1089 Los Angeles Zonal St. Comment
  UCR23895  Medicago arabica John C. Roos 1939-5-2 292 Napa North Coast Range, Pacific Union College, Angwin 549 Comment
  CLARK-A1528-4947  Medicago polymorpha John C. Roos 1948-4-17 3781 San Bernardino Loma Linda Comment
  RSA41276  Melica aristata J. C. Roos 1941-7-19 116 San Bernardino Vivian Creek, San Bernardino Mts. 2226 Comment
  CLARK-A1528-4722  Melica californica John C. Roos 1950-4-22 4754 Riverside Box Springs Mountains 792 Comment
  UCR25190  Melica californica John C. Roos 1951-5-27 5046 Mariposa Sierra Nevada Mtns., hills about 8 miles east of Mariposa 1006 Comment
  LA102206  Melica frutescens John C. Roos; 1965-6-13 sn Riverside W base of San Jacinto Mountains, E of Hemet (Probably on Highway 74) Comment
  RSA85572  Melica frutescens J. C. Roos 1952-4-9 5492 Riverside Mt. Rubidoux 396 Comment
  CLARK-A1528-4726  Melica imperfecta John C. Roos 1937-3-25 442 Los Angeles Lancaster Comment
  CLARK-A1528-5188  Melica imperfecta John C. Roos 1950-4-29 4771 Riverside Box Springs Mountains 609 Comment
  RSA659631  Melica imperfecta J. C. Roos 1950-4-4 4754 Riverside The summit of Reche Canyon. On 2 year old burn, steep West slope, 0.5 mi. N.E. of the summit. 793 Comment
Read comments
Apr 3 2011
  CLARK-A1528-4735  Melica stricta John C. Roos 1950-6-17 San Bernardino San Bernardino Mountains 2133 Comment
  POM266489  Melica stricta J. C. Roos 1942-7-1 1256 Mariposa Rocky gorge north of Nevada Falls, Yosemite National Park. Comment
  RSA47296  Melilotus officinalis J. C. Roos 1949-6-11 4389 San Bernardino Roadside ditch near Loma Linda. 335 Comment
  UCR19128  Melissa officinalis John C. Roos 1948-4-28 3958 Sonoma North Coast Ranges, Healdsburg, Mill Creek - Barrell Spring Comment
  RSA47430  Menodora scabra var. laevis J. C. Roos 1949-6-23 4463 San Bernardino Lanfair Valley, north of Hackberry Mountain. 1311 Comment
  RSA69819  Mentha aquatica J. C. Roos 1951-9-25 5289 Riverside West end Fairmount Park 259 Comment
  UCR25755  Mentha canadensis John C. Roos 1937-7-31 965 San Bernardino San Bernardino Valley, San Bernardino 305 Comment
  RSA301535  Mentha suaveolens J. C. Roos 1937-8-2 2271 San Bernardino irrigation ditch near Bryn Mawr, San Bernardino Valley, southern California Comment
  CLARK-A1528-3159  Mentzelia albicaulis John C. Roos 1937-4-23 545 San Bernardino Twentynine Palms Comment
  UCR26255  Mentzelia congesta John C. Roos 1937-5-31 547 Los Angeles San Gabriel Mtns., Big Pines 2195 Comment
  UCR19118  Mentzelia dispersa John C. Roos 1948-7-4 3897 Inyo Northern Mojave Desert, Panamint Mountains, east slope of Baldy [=Rogers?] Peak 2561 Comment
  RSA45527  Mentzelia longiloba var. longiloba J. C. Roos, L. Roos 1949-4-7 4160 Imperial Along All-America Canal, 35 miles SE of Niland. Comment
  RSA0117778  Mentzelia oreophila A. R. Roos, J. C. Roos 1954-6-11 6125 Inyo Wild Rose Canyon, Panamint Mts. 976 Comment
  CLARK-A1528-3170  Mentzelia reflexa John C. Roos 1947-4-19 3480 Inyo Death Valley National Park Comment
  POM263281  Mentzelia veatchiana J. C. Roos 1937-3-25 543 Los Angeles 12 miles west of Lancaster Comment
  RSA85503  Microseris douglasii subsp. douglasii J. C. Roos 1952-4-23 5573 Riverside 1 mile southeast of Perris 427 Comment
  UCR18670  Microseris lindleyi John C. Roos 1950-4-5 4721 Riverside Peninsular Range, Box Springs Mtns., north side of Pigeon Pass 427 Comment
  RSA92595  Microseris lindleyi J. C. Roos 1952-5-17 5674 San Bernardino Adelanto. 945 Comment
  CLARK-A1528-5241  Microseris linearifolia John C. Roos 1950-4-5 4721 Riverside Pigeon Pass 426 Comment
  UCSB42141  Microsteris gracilis Roos, John 1966-4-9 San Bernardino North Shore; 2 miles east of Fawnskin-Bear Valley; San Bernardino Mtns Comment
  RSA449971  Microsteris gracilis subsp. gracilis J. C. Roos 1967-5-30 s.n. San Bernardino A meadow, Broom Flat. Comment
  UCR25188  Mimulus bolanderi John C. Roos, L. Roos 1951-5-26 5042 Mariposa Sierra Nevada Mtns, hills about 7 miles east of Mariposa 1037 Comment
  CLARK-A1528-4235  Mimulus brevipes John C. Roos 1941-5-6 152 San Bernardino Loma Linda Comment
  UCSB42131  Mimulus brevipes Roos, John 1965-6-6 San Bernardino Mill Creek; near Fallsvale; San Bernardino Mtns Comment
  CLARK-A1528-4240  Mimulus densus John C. Roos 1965-9-11 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4241  Mimulus densus John C. Roos, Lucille Roos 1952-7-28 5845 Inyo White Mountains 2621 Comment
  UCR24432  Mimulus douglasii John C. Roos 1939-3-18 303 Napa North Coast Range, Snell Valley, [near] Pacific Union College, Angwin 183 Comment
  POM301478  Mimulus floribundus J. C. Roos 1937-5-10 2330 Riverside Anual in moist spot in hills west of Perris. Comment
  CLARK-A1528-4248  Mimulus fremontii John C. Roos 1948-6-19 3883 Riverside San Jacinto Mountains Comment
  CLARK-A1528-866  Mimulus guttatus John C. Roos 1951-9-24 5241 San Bernardino Loma Linda Comment
  RSA450309  Mimulus guttatus J. C. Roos 1943-4-9 2614 San Bernardino Slong swampy ditch, Waterman Ave. Comment
  CLARK-A1528-4257  Mimulus lewisii John C. Roos 1937-8-8 2404 Inyo Lone Pine Canyon Comment
  CLARK-A1528-4260  Mimulus moschatus John C. Roos 1937-6-5 933 San Bernardino San Bernardino Mountains Comment
  UCR24461  Mimulus moschatus John C. Roos 1940-7-18 1867 San Bernardino San Bernardino Mtns., Green Valley Comment
  RSA71731  Mimulus nanus var. mephiticus J. C. Roos, Lucille Roos 1952-7-28 5846 Inyo Drying seep with Artemisia nova, lappula Redowskii, etc., Wyman Canyon, White Mts. 2622 Comment
  CLARK-A1528-4261  Mimulus palmeri John C. Roos 1937-5-24 2041 San Bernardino Deep Creek Comment
  UCR30484  Mimulus parishii John C. Roos 1937-7-16 2424 San Bernardino San Gabriel Mtns., upper Lytle Creek, just below Stockton Flats 1768 Comment
  UCR24502  Mimulus pilosus John C. Roos 1949-6-21 4428 San Bernardino Eastern Mojave Desert, New York Mtns, New York Peak 2256 Comment
  CLARK-A1528-4268  Mimulus primuloides John C. Roos 1937-7-28 2352 San Bernardino San Bernardino Mountains Comment
  RSA659665  Mimulus tilingii J. C. Roos 1949-7-4 4540 San Bernardino Along stream at High Creek. 2744 Comment
  RSA47294  Minuartia rubella J. C. Roos 1949-7-4 4537 San Bernardino San Gorgonio ridge. 3354 Comment
  UCR26231  Mirabilis albida John C. Roos 1946-10-5 3124 San Bernardino San Bernardino Mtns., Public Camp at Pipes Creek, east end of the San Bernardino Mtns. 1982 Comment
  CLARK-A1528-5026  Mirabilis froebelii John C. Roos 1937-6-7 1454 Imperial Coyote Wells Comment
  RSA659480  Mirabilis laevis var. villosa J. C. Roos 1966-3-26 s.n. Riverside 2 miles SE of Desert Center. Comment
  CLARK-A1528-3238  Modiola caroliniana John C. Roos 1956-5-20 6582 San Bernardino Loma Linda Comment
  CLARK-A1528-4226  Mohavea breviflora John C. Roos 1947-4-19 3496 Inyo Death Valley National Monument Comment
  UCR25379  Mohavea confertiflora John C. Roos 1949-3-26 4126 Riverside Sonoran (Colorado) Desert, Mouth of Shaver's Wash [= Box Canyon], east of Mecca 61 Comment
  UCR25399  Mollugo cerviana John C. Roos 1946-9-14 3015 Riverside San Jacinto Mtns., Thomas Valley 1375 Comment
  POM263031  Monardella cinerea J. C. Roos 1937-7-16 372 San Bernardino Mt. San Antonio, betrween L.A. & San Bernardino counties 2805 Comment
  RSA48877  Monardella eremicola J. C. Roos, C. A. Weatherby 1949-9-2 4642 San Bernardino Kingston Mts., north slope. 2012 Comment
  CAS-BOT-BC221761  Monardella linoides subsp. sierrae John Roos; Lucille Roos 1947-7-12 2836 Inyo At Thorndyke's Ranch, Wild Rose [Wildrose] Canyon, Panamint Mts. 2133 Comment
  CLARK-A1528-3178  Monardella macrantha John C. Roos, Lucille Roos 1952-6-14 5770 San Bernardino San Bernardino Mountains 1158 Comment
  RSA264144  Monardella sheltonii J. C. Roos 1937-7-4 335 Santa Barbara Upper Cuyama Valley Comment
  UCR30513  Monardella villosa John C. Roos 1937-7-4 335 Santa Barbara Lower Cuyama Valley Comment
  CLARK-A1528-2589  Monolepis nuttalliana John C. Roos 1954-3-25 6047 San Bernardino Mojave Desert Comment
  RSA71735  Monolepis nuttalliana J. C. Roos, L. Roos 1952-7-28 5852 Inyo Roadside at head of Wyman Canyon, White Mts. 3140 Comment
  UCR24216  Monolepis nuttalliana John C. Roos 1946-9-21 3081 San Bernardino San Bernardino Mtns, Baldwin Lake Comment
  RSA658694  Monolepis nuttalliana J. C. Roos 1949-4-8 4200 Imperial South of Palo Verde. Comment
Read comments
Aug 28 2016
  UCR19047  Monoptilon bellioides John C. Roos 1966-3-20 s.n. Riverside Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 miles southeast of Desert Center 366 Comment
  RSA71691  Montia chamissoi J. C. Roos 1952-7-30 5862 Mono Crooked Creek, White Mts. 2744 Comment
  CLARK-A1528-4740  Muhlenbergia andina John C. Roos 1946-9-4 2950 San Bernardino San Bernardino Mountains 2438 Comment
  POM302530  Muhlenbergia andina J. C. Roos 1943-11-6 2746 San Bernardino Upper Mill Creek 2134 Comment
  UCR30547  Muhlenbergia andina John C. Roos 1950-7-29 4887 San Bernardino San Bernardino Mtns, Mill Creek at the marble quarry 2073 Comment
  UCSB45591  Muhlenbergia andina Roos, John 1965-9-11 San Bernardino quarry in Mill Creek Canyon; San Bernardino Mtns Comment
  CAS-BOT-BC262583  Muhlenbergia arsenei J. C. Roos; A. R. Roos 1950-8-5 4896 San Bernardino 1 1/2 miles SW of Coliseum Mine, Clark Mts., Mojave Desert 1737 Comment
  RSA61540  Muhlenbergia arsenei J. C. Roos 1950-8-5 4896 San Bernardino north slope Clark Mts. about 1 1/2 miles S.W. of Coliseum Mine, eastern Mojave Desert. 1706 Comment
  CLARK-A1528-4748  Muhlenbergia californica John C. Roos 1949-9-24 4666 San Bernardino San Bernardino Mountains 1920 Comment
  POM263464  Muhlenbergia californica J. C. Roos 1937-8-23 467 Riverside Snow Creek, north base of Mt. San Jacinto. Comment
  UCR25117  Muhlenbergia californica John C. Roos 1951-7-30 5075 Los Angeles San Gabriel Mtns., Big Rock Creek, north of Mt. Baden Powell 1982 Comment
  UCR25388  Muhlenbergia californica John C. Roos 1937-8-23 467 Riverside San Jacinto Mtns, north base of Mt. San Jacinto, Snow Creek 762 Comment
  CLARK-A1528-4754  Muhlenbergia microsperma John C. Roos 1952-4-9 5507 Riverside Riverside 365 Comment
  CLARK-A1528-4757  Muhlenbergia microsperma John C. Roos 1937-4-3 1347 San Bernardino Reche Canyon Comment
  RSA0049531  Muhlenbergia microsperma J. C. Roos 1952-4-9 5507 Riverside East face Mt. Rubidoux. 365 Comment
  RSA77259  Muhlenbergia minutissima J. C. Roos, L. Roos 1952-10-18 5903 Riverside Hidden Valley Campground 1220 Comment
  UCR20457  Muhlenbergia minutissima John C. Roos, L. Roos 1952-10-19 5903 Riverside Little San Bernardino Mtns, Hidden Valley Campground 1220 Comment
  CLARK-A1528-4760  Muhlenbergia porteri John C. Roos, Alfred R. Roos 1950-8-4 4889 San Bernardino Clark Mountain 1219 Comment
  CLARK-A1528-4761  Muhlenbergia porteri John C. Roos 1950-8-4 San Bernardino Clark Mountain Comment
  UCR24061  Muhlenbergia porteri John C. Roos 1955-8-25 6546 Inyo Northern Mojave Desert, East slope of the Inyo Mountains, Loretto road, 1 mile west of Loretto Mine 1585 Comment
  POM263185  Muhlenbergia richardsonis J. C. Roos 1937-7-27 452 San Bernardino Bear Valley, Pine Knot Comment
  UCR25617  Muhlenbergia richardsonis John C. Roos, L. Roos 1951-8-9 5123 Inyo White Mtns, east side of Reed Flat 3049 Comment
  CLARK-A1528-5594  Muilla maritima John C. Roos 1937-6-25 San Bernardino San Bernardino Mountains Comment
  RSA85577  Muilla maritima J. C. Roos 1952-4-2 5456 Riverside At Edgemont near Box Springs. 488 Comment
  CLARK-A1528-2992  Myriophyllum exalbescens John C. Roos 1952-6-24 San Bernardino San Bernardino Comment
  RSA659191  Myriophyllum sibiricum J. C. Roos 1966-9-9 s.n. San Bernardino In Big Bear Lake, San Bernardino Mtns. Comment
  CLARK-A1528-4944  Nama demissa John C. Roos 1937-4-18 1388 Riverside Whitewater Comment
  CLARK-A1528-5061  Nama hispida var. spathulata John C. Roos 1949-4-9 4203 Riverside Desert Center 274 Comment
  CLARK-A1528-2982  Nama rothrockii John C. Roos 1937-7-28 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-3448  Navarretia atractyloides John C. Roos 1952-6-14 5769 San Bernardino Yucaipa 914 Comment
  RSA71738  Navarretia breweri J. C. Roos, L. Roos 1952-7-28 5855 Inyo White Mountains; head of Wyman Canyon 3201 Comment
  UCSB42145  Navarretia hamata Roos, John 1965-6-30 Riverside Ortega Highway, Santa Ana Mtns Comment
  OBI36027  Navarretia squarrosa John C. Roos 1950-7-22 4878 Sonoma 2 miles east of Duncan Mills 61 Comment
  OBI33602  Nemacladus glanduliferus J. C. Roos 1948-5-15 3851 Riverside Upper Lost Palms Cyn, Eagle Mts, Colorado Desert Comment
  UCR25988A  Nemacladus glanduliferus John C. Roos 1947-3-15 3354 A Riverside Sonoran (Colorado) Desert, Santa Rosa Mountains, mouth of Deep Canyon at foot of mtns. 366 Comment
  POM301608  Nemacladus orientalis J. C. Roos 1937-4-28 1792 San Bernardino 20 miles south of Needles. Comment
  RSA659773B  Nemacladus sigmoideus J. C. Roos 1947-3-15 3354 Riverside Mouth of Deep Canyon. Santa Rosa Mtns 366 Comment
Read comments
Apr 3 2011
  RSA591746B  Nemacladus tenuis var. tenuis J. C. Roos 1966-3-26 s.n. Riverside 2 mi S.E. of Desert Center. Comment
  UCR25185  Nemophila pedunculata John C. Roos, L. Roos 1951-6-9 5057 San Bernardino San Bernardino Mtns., Running Springs 1829 Comment
  UCSB37377  Nicotiana glauca Roos, John 1965-6-27 San Bernardino Loma Linda 304 Comment
  UCR23749  Nicotiana quadrivalvis John C. Roos, L. Roos 1952-6-21 5782 Riverside Pass between Reche Canyon and Morneo Valley, 4 mi NW of Moreno. 686 Comment
  CAS-BOT-BC213916  Nitrophila mohavensis J. C. Roos; A. R. Roos 1954-6-13 6140 Inyo open flats of Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road 624 Comment
  CLARK-A1528-2594  Nitrophila mohavensis John C. Roos 1954-6-13 6140 Inyo Death Valley Junction 624 Comment
  NY324361  Nitrophila mohavensis J. C. Roos 1954-6-13 6140 Inyo This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  NY32589  Nitrophila mohavensis J. C. Roos 1954-9-14 6234 Inyo This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  RSA173350  Nitrophila mohavensis J. C. Roos 1954-7-18 6194 Inyo Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road 625 Comment
  RSA85275  Nitrophila mohavensis J. C. Roos 1953-11-1 6036 Inyo Amargosa desert, 3 miles NE of Death Valley Junction, on Ash Meadows Rd. 625 Comment
  SBBG103046  Nitrophila mohavensis J. C. Roos, A. R. Roos 1954-6-13 6140 Inyo open flats of Amargosa Desert, 3 mi NE of Death Valley Jct along Ash Meadows Rd; ISOTYPE 624 Comment
  SD50073  Nitrophila mohavensis John C. Roos 1954-7-18 6194 Inyo Amargosa Desert 3.0 miles northeast of Death Valley Junction along Ash Meadows road. 625 Comment
  UC1494265  Nitrophila mohavensis J. C. Roos and A. R. Roos 1954-6-13 6140 Inyo along Ash Meadows road 3 mi ne Death Valley Junction; Amorgosa Desert; Amargosa Desert, NE of Death Valley, Inyo Co. 624 Comment
  UCSB37491  Nitrophila mohavensis Roos, J. Inyo Amargosa Desert 3 mi. NE Death Valley Junction along Ash Meadow Road 624 Comment
  RSA0002413  Nitrophila mohavensis J. C. Roos, A. Roos, Suzanne O., Walter Wisura 1954-6-13 6140 Inyo Open flats of Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road 625 Comment
  CLARK-A1528-4923  Nitrophila occidentalis John C. Roos 1937-5-30 2044 San Bernardino Victorville Comment
  CLARK-A1528-1495  Nolina bigelovii John C. Roos 1982-5-15 3852 Riverside Eagle Mountains Comment
  RSA648734  Nolina bigelovii J. C. Roos 1948-5-15 3852 Riverside Lost Palms Canyon, Eagle Mountains., Colorado Desert. Comment
  RSA45204  Nolina parryi J. C. Roos, L. Roos 1949-4-23 4282 Riverside Monson Canyon, Eagle Mountains. Comment
  CLARK-A1528-35  Notholaena newberryi John C. Roos, Lucille Roos 1951-10-27 5348 Riverside Riverside 304 Comment
  CLARK-A1528-3582  Notholaena newberryi John C. Roos 1937-5-2 1412 Riverside La Sierra Comment
  CLARK-A1528-3569  Notholaena parryi John C. Roos, Lucille Roos 1955-4-6 6295 Inyo Saline Valley 502 Comment
  RSA0018415  Nuttallanthus texanus J. C. Roos 1947-3-15 3446 Riverside Valle Vista, San Jacinto Valley. Comment
  CLARK-A1528-3300  Oenothera avita subsp. eurekensis John C. Roos, Alfred R. Roos 1955-4-9 6318 Inyo Eureka Valley 944 Comment
  RSA105019  Oenothera avita subsp. eurekensis J. C. Roos 1955-5-13 6362 Inyo West side Eureka Valley at mouth of Marble Canyon. 1037 Comment
  UCR25762  Oenothera californica John C. Roos, L. Roos 1952-5-9 5624 San Bernardino San Bernardino Valley, near Santa Ana River in Colton 274 Comment
  RSA47435  Oenothera cespitosa subsp. crinita J. C. Roos, L. Roos 1949-5-28 4374 San Bernardino North side Clark Mountain. 1616 Comment
  RSA79561  Oenothera cespitosa subsp. marginata J. C. Roos, A. R. Roos 1953-8-11 5993 Inyo 2.5 miles east of Blue Bell Mine, Inyo Mts. 2866 Comment
  CLARK-A1528-3298  Oenothera deltoides John C. Roos 1937-4-18 1370 Riverside Snow Creek Comment
  CLARK-A1528-3348  Oenothera deltoides subsp. eurekensis John C. Roos, Philip A. Munz 1954-9-18 20158 Inyo Eureka Dunes Comment
  UCR26235  Oenothera laciniata John C. Roos 1948-6-21 3885 San Bernardino San Bernardino Valley, Loma Linda. 305 Comment
  POM263142  Oreonana vestita J. C. Roos 1937-7-16 390 Los Angeles Mt. San Antonio [Los Angeles-San Bernardino County line] 2744 Comment
  RSA0070996  Orobanche californica subsp. feudgei John C. Roos 1937-6-10 1782 San Diego Boulevard. Comment
  CLARK-A1528-3393  Orobanche fasciculata John C. Roos, Lucille Roos 1951-8-11 5183 Mono White Mountains 3230 Comment
  OBI35848  Orobanche fasciculata J. C. Roos 1967-5-20 s.n. San Bernardino San Bernardino Mts Comment
  RSA0087206  Orobanche fasciculata John Roos, Lucille Roos 1952-7-30 5867 Mono Along Crooked Creek, White Mts. 2865 Comment
  CLARK-A1528-5740  Orthocarpus John C. Roos 1937-7-2 469 b Santa Barbara Comment
  POM151780  Orthocarpus attenuatus J. C. Roos 1937-6-14 4 San Diego near Descanso Junction Comment
  CLARK-A1528-4283  Orthocarpus purpurascens John C. Roos 1947-3-21 3368 Riverside Reche Canyon Comment
  CLARK-A1528-4768  Oryzopsis bloomeri John C. Roos 1946-9-28 3090 San Bernardino San Bernardino Mountains 0 Comment
  CLARK-A1528-4771  Oryzopsis hymenoides John C. Roos 1949-6-24 4480 San Bernardino Clark Mountain 2072 Comment
  CLARK-A1528-5701  Oxalis corniculata John C. Roos 1949-11-18 4697 San Bernardino San Bernardino Valley Comment
  CLARK-A1528-3752  Oxytheca dendroidea John C. Roos, Alfred R. Roos 1954-8-14 6212 Inyo 2544 Comment
  UC1234681  Oxytheca dendroidea subsp. dendroidea J. C. Roos 1955-7-23 6504 Inyo Soldier Flat, e base of Waucoba Mountain Inyo Mountains, Waucoba Mountain 2194 Comment
  CAS-BOT-BC413258  Oxytheca dendroidea subsp. dendroidea John Roos; Lucille Roos 1954-6-27 6166 Inyo Flats 1 1/2 miles east of Andrews Mtn., Inyo Mts. 2545 Comment
  NY404462  Oxytheca dendroidea subsp. dendroidea J. C. Roos 1954-6-27 6166 Inyo Flats 1 1/2 miles east of Andrews Mountain, Inyo Mountains 2545.1 Comment
  RSA89047  Oxytheca dendroidea subsp. dendroidea J. C. Roos, A. R. Roos 1954-8-14 6212 Inyo Flats 1.5 miles east of Andrews Mountain, Inyo Mountains. 2546 Comment
  RSA92168  Oxytheca dendroidea subsp. dendroidea J. C. Roos, Lucille Roos 1954-6-27 6166 Inyo 1.5 miles east of Andrews Mountain, Inyo Mountains. Comment
  UC1042985  Oxytheca dendroidea subsp. dendroidea John and Lucille Roos 1954-6-27 6166 Inyo flats 1.5 mi e Andrews Mtn.; Inyo Mts. 2545 Comment
  UC1042995  Oxytheca dendroidea subsp. dendroidea J. C. and A. R. Roos 1954-8-14 6212 Inyo flats 1.5 mi e Andrews Mtn.; Inyo Mts. 2545 Comment
  RSA0049512  Oxytheca perfoliata J. C. Roos 1965-6-16 s.n. San Bernardino 4 mi. north of Adelanto. Comment
  CLARK-A1528-3765  Oxytheca trilobata John C. Roos, Lucille Roos 1956-7-21 6588 San Bernardino Deer Lick Springs Comment
  UC1142445  Oxytropis parryi John and Lucille Roos 1951-8-10 11900 Mono 1 mi n Sheep Mtn. (White Mts.); , n of Sheep Mtn 3627 Comment
  UCSB37916  Packera ionophylla Roos, John 1964-6-26 San Bernardino Upper Santa Ana River, San Bernardino Mtns. Comment
  SD53001  Panicum acuminatum var. fasciculatum John C. Roos 1955-7-23 6511 Inyo mouth of Beveridge Canyon, east base Inyo Mts., Saline Valley 609 Comment
  UCR24014  Panicum alatum var. minus John C. Roos 1965-9-5 s.n. Riverside Sonoran (Colorado) Desert, 18 mi. west of Blythe 122 Comment
  CLARK-A1528-4783  Panicum capillare John C. Roos 1937-7-19 377 San Bernardino Santa Ana River Comment
  POM263115  Panicum capillare J. C. Roos 1937-7-19 377 San Bernardino Near San Bernardino. Comment
Read comments
Jun 6 2015
  UCR24013  Panicum capillare John C. Roos 1965-9-15 s.n. San Bernardino Mojave Desert, Victorville Comment
  UCR24065  Panicum capillare John C. Roos, E. C. Jaeger 1955-7-23 6518 Inyo Northern Mojave Desert, Saline Valley, below mouth of Hunter Canyon 351 Comment
  RSA450058  Panicum hirticaule subsp. hirticaule J. C. Roos 1965-10-17 s.n. San Diego De Luz Canyon: Along De Luz-Murrieta Road and De Luz Creek. 150 Comment
  UCR23249  Panicum miliaceum John C. Roos 1958-5-10 s.n. San Bernardino San Bernardino Valley, 204 Tulip, Loma Linda Comment
  CAS-BOT-BC274183  Pappostipa speciosa J. C. Roos 1965-6-13 s.n. Riverside East of Hemet Comment
  CLARK-A1528-1341  Parietaria floridana John C. Roos 1949-4-6 4152 Imperial Chocolate Mountains Comment
  CLARK-A1528-4391  Parietaria floridana John C. Roos 1937-2-21 1310 Riverside La Sierra Comment
  UCSB40900  Paspalum dilatatum Roos, John 1936-10-13 Orange Costa Mesa near Santa Ana Comment
  POM301692  Paspalum dilatatum J. C. Roos 1942-6-20 990 Orange Anaheim, Telegraph Road, east of Los Angeles Comment
  RSA69815  Paspalum dilatatum J. C. Roos 1951-9-25 5262 Riverside West end Fairmount Park 259 Comment
  UCR24128  Pectis papposa John C. Roos 1965-9-5 s.n. Riverside Sonoran (Colorado) Desert, 18 mi. west of Blythe 122 Comment
  CLARK-A1528-7856  Pectocarya linearis John C. Roos 1948-4-10 3785 San Bernardino Loma Linda Comment
  CLARK-A1528-2248  Pectocarya linearis subsp. ferocula John C. Roos 1937-3-24 1338 Riverside Pigeon Pass Comment
  RSA444793  Pectocarya setosa J. C. Roos 1952-5-17 5677 San Bernardino 8 miles west of Adelanto. 945 Comment
  POM262899  Pedicularis semibarbata J. C. Roos 1939-5-26 716 San Bernardino Bluff Lake. Comment
  POM263092  Pedicularis semibarbata J. C. Roos 1937-7-15 387 San Bernardino Stockton Flats, San Gabriel Mountains. Comment
  CLARK-A1528-3592  Pellaea andromedifolia John C. Roos 1952-4-29 5597 Riverside Reche Canyon 457 Comment
  UCR23343  Pellaea mucronata John C. Roos 1947-3-8 3310 San Bernardino San Bernardino Mountains, Deep Creek 1159 Comment
  UCR23344  Pellaea truncata John C. Roos 1949-6-21 4431 San Bernardino Eastern Mojave Desert, New York Mountains, south slope 2134 Comment
  UCR30486  Penstemon anguineus John C. Roos 1948-9-1 3945 Siskiyou 10 mi. SW of Etna Comment
  RSA44883  Penstemon anguineus J. C. Roos 1948-9-1 3945 Siskiyou 10 miles SW of Etna. Comment
  CLARK-A1528-4293  Penstemon bridgesii John C. Roos 1947-7-12 2898 Inyo Panamint Mountains 2499 Comment
  RSA444465  Penstemon caesius J. C. Roos 1965-7-17 s.n. San Bernardino South Fork, near Barton Flats 2439 Comment
  UC1080615  Penstemon calcareus John C. Roos 1955-5-13 6344 Inyo e Eureka Valley sand dunes (w base Last Chance Mts.); , e of Eureka Valley sand dunes 1310 Comment
  POM263058  Penstemon clevelandii subsp. connatus J. C. Roos 1941-5-10 128 Riverside Pinyon Flats Camp, Santa Rosa Mountains. 1220 Comment
  RSA71751  Penstemon floridus J. C. Roos, L. Roos 1952-7-28 5838 Inyo Wyman Canyon, White Mts. 2591 Comment
  UC1010176  Penstemon floridus John and Lucille Roos 1951-8-7 5084 Inyo w side Westgard Pass , w side Westgard Pass (White Mts.) 2133 Comment
  UCR23262  Penstemon fruticiformis John C. Roos 1947-4-20 3518 Inyo Northern Mojave Desert, Panamint Mtns: Emigrant Pass 1555 Comment
  UCR26175  Penstemon fruticiformis subsp. fruticiformis John C. Roos 1947-7-15 2867 Inyo Panamint Mtns, Wildrose Canyon in the Mtns, Death Valley National Monument 1677 Comment
  CLARK-A1528-4303  Penstemon grinnellii John C. Roos 1965-7-17 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4305  Penstemon heterodoxus John C. Roos 1937-8-8 979 Inyo Sierra Nevada Comment
  CLARK-A1528-5741  Penstemon incertus John C. Roos 1947-8-2 3734 San Bernardino Burns Canyon 1280 Comment
  RSA45218  Penstemon incertus J. C. Roos, L. Roos 1949-5-14 4299 San Bernardino 5 miles west of The Windmill; Burns-Pipes Wash, east end San Bernardino Mts. 1220 Comment
  UCR30483  Penstemon labrosus John C. Roos 1949-7-30 4593 San Diego Peninsular Range, Palomar Mountain 1585 Comment
  CLARK-A1528-4313  Penstemon palmeri John C. Roos 1965-7-11 Inyo Panamint Range Comment
  NY650664  Penstemon rostriflorus J. C. Roos 1952-7-28 5848 Inyo Wyman Canyon, White Mountains 2743.2 Comment
  CLARK-A1528-1031  Penstemon scapoides John C. Roos, Alfred R. Roos 1953-8-8 5936 Inyo Inyo Mountains 2743 Comment
  NY651575  Penstemon scapoides J. C. Roos 1951-8-9 5122 Inyo East side Reed Flat, White Mountains 3048.0 Comment
  RSA71671  Penstemon scapoides J. C. Roos, Roos 1951-8-9 5122 Inyo White Mountains: East side of Reed Flat. 3049 Comment
  UCR19060  Penstemon scapoides John C. Roos 1958-7-5 s.n. Inyo Northern Mojave Desert, Inyo Mountains, near Badger Flats 2683 Comment
  NY660822  Penstemon speciosus J. C. Roos 1952-7-27 5834 Inyo Reed Flat, White Mountains 3169.9 Comment
  RSA71748  Penstemon speciosus J. C. Roos, L. Roos 1952-7-27 5834 Inyo Ridge at S. E. rim Reed Flat, White Mountains. 3171 Comment
  UC1234847  Penstemon speciosus J. C. Roos 1955-6-17 6402 Inyo 2 mi ne Willow Spring; Last Chance Mountains 2011 Comment
  UCSB37920  Pericome caudata Roos, John 1956-8-29 Inyo At the head of Death Valley Canyon in the Panamint Mtns. Comment
  CAS-BOT-BC423276  Peritoma lutea J. C. Roos 1955-6-21 6464 Inyo Near Willow Spring, Last Chance Mountains. 1828 Comment
  CLARK-A1528-2022  Perityle emoryi John C. Roos 1946-12-7 3183 Riverside Pushawalla Palms Comment
  CLARK-A1528-1063  Perityle megalocephala John C. Roos 1953-8-8 5938 Inyo Inyo Mountains 2743 Comment
  GH427271  Perityle megalocephala J. C. Roos & A. R. Roos 1953-8-8 5958 Unknown behind Blue Bell Mine, Badger Flat, Inyo Mts. 2743 Comment
  UCSB42258  Persicaria amphibia Roos, John 1966-9-10 San Bernardino Big Bear Lake; San Bernardino Mtns Comment
  CAS-BOT-BC413494  Persicaria amphibia John Roos; Lucille Roos 1954-10-9 6253 Ventura Lake Sherwood 300 Comment
  UCSB42133  Persicaria lapathifolia Roos, John 1965-9-15 San Bernardino Mohave River at Victorville. Comment
  GH424439  Petalonyx nitidus J. C. Roos & L. Roos 1954-6-28 6169 Unknown Loretto Road, west side Eureka Valley, Inyo Mts. 1676 Comment
  LA102313  Petalonyx nitidus John C. Roos; 1947-6-21 sn San Bernardino Crushenbury Canyon Comment
  UCR26296  Petalonyx nitidus John C. Roos 1949-7-28 4523 San Bernardino Eastern Mojave Desert, Kingston Mtns, 0.2 mi below Beck's Spring 1341 Comment
  RSA648081  Petalonyx nitidus J. C. Roos 1965-6-11 s.n. Inyo Wildrose Canyon. Panamint Mts. Comment
Read comments
Apr 25 2019
  SEINET205936  Petradoria discoidea J. C. Roos, AR Roos 1953-8-9 5945 Inyo Tamarack Canyon Inyo Mts 2682 Comment
  CLARK-A1528-1203  Petunia parviflora John C. Roos 1937-6-7 514 Riverside Comment
  UCR23565  Petunia parviflora John C. Roos 1967-6-20 s.n. San Bernardino San Bernardino Valley, Loma Linda 396 Comment
  UCR25800B  Phacelia campanularia John C. Roos 1946-11-2 3155 San Bernardino Mojave Desert, Wash NW of Lone Star Ranch [Yucca Valley?; the site of a gas station north of Joshua Tree Nat. Mon.] Comment
  RSA44893  Phacelia cicutaria var. hubbyi J. C. Roos 1947-5-4 3603 Los Angeles Kellogg Hill West of Pomona, Los Angeles County Comment
  UC1234864  Phacelia curvipes J. C. Roos 1955-6-17 6417 Inyo 2 mi ne Willow Spring; Last Chance Mountains 2011 Comment
  CLARK-A1528-3003  Phacelia davidsonii John C. Roos 1937-5-31 750 Los Angeles San Gabriel Mountains Comment
  CLARK-A1528-3005  Phacelia davidsonii John C. Roos 1937-5-9 2091 San Bernardino Oak Glen Comment
  UCR26049  Phacelia distans John C. Roos, A. R. Roos 1954-6-12 6129 Inyo Northern Mojave Desert, Panamint Mountains, upper Wildrose Canyon, near Wildrose Peak 2439 Comment
  RSA155670  Phacelia fremontii J. C. Roos 1955-6-17 6412 Inyo 2 miles NE of Willow Springs, Last Chance Mountains. 2012 Comment
  POM264279  Phacelia hastata J. C. Roos 1937-7-22 684 San Bernardino Dry lake, in the water, San Bernardino Mtns. 2744 Comment
  RSA92072  Phacelia ivesiana J. C. Roos, L. Roos 1954-5-6 6073 Inyo Amargosa river bottom 4 mile north of Shoshone. 518 Comment
  UCR26048  Phacelia pediculoides John C. Roos, L. Roos 1954-5-6 6073 Inyo Northern Mojave Desert, Amargosa River bottom, 4 mi. north of Shoshone 518 Comment
  RSA71707  Phacelia peirsoniana J. C. Roos 1952-7-31 5878 Inyo NW of Cedar Flat, White Mountain 2439 Comment
  RSA104825  Phacelia perityloides J. C. Roos 1955-5-13 6331 Inyo West base Last Chance Mountains, east of Eureka Valley sand dunes 1220 Comment
  UC1236255  Phacelia perityloides John C. Roos 1955-5-13 6331 Inyo e Eureka Valley sand dunes; west base Last Chance Mts. 1219 Comment
  CLARK-A1528-3013  Phacelia perityloides var. jaegeri John C. Roos 1949-5-28 4367 San Bernardino Clark Mountain Range 1889 Comment
  CLARK-A1528-5060  Phacelia vallis-mortae John C. Roos 1937-4-18 679 Riverside Mount San Jacinto 487 Comment
  CLARK-A1528-5438  Phacelia vallis-mortae John C. Roos 1947-4-18 3475 Inyo Death Valley National Park Comment
  CLARK-A1528-4793  Phalaris aquatica John C. Roos 1962-6-30 Riverside Santa Ana Mountains Comment
  RSA443395  Phalaris aquatica J. C. Roos 1962-6-30 s.n. Riverside Head of Tin Mine Canyon Comment
  POM301698  Phalaris lemmonii J. C. Roos 1940-6-11 1913 Marin junction of Highway 37 and 10, north of San Rafael Comment
Read comments
Jun 10 2015
  UCR24037  Phalaris lemmonii John C. Roos 1940-6-11 1913 Marin San Francisco Bay Region, Junction of Hyws 101 and 37, north of San Rafael 1 Comment
Read comments
Jun 10 2015
  CLARK-A1528-4804  Phleum alpinum John C. Roos 1937-7-22 1173 San Bernardino South Fork Meadows Comment
  RSA443401  Phleum alpinum J. C. Roos 1965-7-31 s.n. San Bernardino South Fork, San Bernardino Mountains. 2287 Comment
  CLARK-A1528-4807  Phleum pratense John C. Roos 1965-7-18 San Bernardino San Bernardino Mountains Comment
  RSA659633  Phleum pratense J. C. Roos 1965-7-18 s.n. San Bernardino Moonridge, Bear Valley, San Bernardino Mountains. Comment
  UCSB42143  Phlox austromontana Roos, John 1967-5-30 San Bernardino Arrastre Creek, on the upper slopes of the San Bernardino Mtns Comment
  RSA0066408  Phlox caespitosa J. C. Roos, A. R. Roos 1953-8-13 6011 Inyo Along crest of Inyo Mts. east of headwaters of Tamarack Canyon. 3140 Comment
  CLARK-A1528-3454  Phlox stansburyi John C. Roos, Lucille Roos 1952-7-27 5837 Inyo White Mountains Comment
  RSA155688  Phlox stansburyi subsp. superba J. C. Roos 1955-6-20 6454 Inyo Last Chance Mountains, 2 miles NE of Willow Spring. 2012 Comment
  UCR27544  Phlox viridis John C. Roos 1947-4-20 3580 Inyo Northern Mojave Desert, Panamint Mountains near Telescope Peak, Wildrose Canyon 1585 Comment
  UCR24016  Phragmites australis John C. Roos 1965-9-22 s.n. San Bernardino Mojave Desert, near the cement plant, Victorville 823 Comment
  RSA69820  Phyla lanceolata J. C. Roos, L. Roos 1951-9-29 5306 San Bernardino Warm Creek near south E street, San Bernardino. 305 Comment
  CLARK-A1528-4967  Phyllodoce breweri John C. Roos 1941-6-5 109 San Bernardino Mount San Gorgonio 2895 Comment
  POM261203  Phyllodoce breweri J. C. Roos 1941-6-5 109 San Bernardino San Bernardino Mountains: Above Dollar Lake. 2896 Comment
  UCR19247  Phyllospadix torreyi John C. Roos 1960-8-27 s.n. Orange Dana Point Comment
  RSA0020259  Physalis acutifolia J. C. Roos 1951-9-25 5263 Riverside Riverside. 259 Comment
  CLARK-A1528-1205  Physalis philadelphica John C. Roos 1940-10-26 220 San Bernardino Loma Linda 335 Comment
  CLARK-A1528-4365  Physalis philadelphica John C. Roos 1951-9-15 5210 San Bernardino San Bernardino Comment
  RSA69866  Physalis philadelphica J. C. Roos 1951-9-15 5210 San Bernardino On recent earth fill with Panicum capillare, corner of Mill and Waterman. 305 Comment
  UC1010299  Picradeniopsis multiflora John C. Roos 1950-9-1 4955 San Bernardino Coliseum Mine, e Mohave Desert Mohave Desert, Clark Mts. 1615 Comment
  CLARK-A1528-3842  Pilostyles thurberi John C. Roos 1963-6-1 Imperial Comment
  RSA450183  Pinus albicaulis J. C. Roos 1965-8-9 s.n. Inyo Heart Lake, Independence Creek. Comment
  RSA450185  Pinus contorta var. murrayana J. C. Roos 1965-7-17 s.n. San Bernardino Dry Lake, San Bernardino Mtns. Comment
  CLARK-A1528-3549  Pinus flexilis John C. Roos 1947-7-13 2818 Inyo Panamint Mountains 3352 Comment
  UCR23371  Pinus lambertiana John C. Roos 1947-6-14 3674 San Bernardino San Bernardino Mtns, Crestline 1585 Comment
  UC1029606  Pinus longaeva J. C. and A. R. Roos 1953-8-9 5956 Inyo Tamarck Canyon Inyo Mountains (upper end) 3048 Comment
  UC1234809  Pinus longaeva J. C. Roos 1955-7-21 6483 Inyo n face Whitetop Peak (summit Last Chance Mountains); Last Chance Mountains, Whitetop Peak 2499 Comment
  UCR23370  Pinus monticola John C. Roos 1942-6-21 1261 Mariposa Yosemite National Park. North of Half Dome. 2410 Comment
  UC1023436  Piptatherum micranthum John and Lucille Roos 1952-7-28 5840 Inyo Wyman Canyon White Mts., Wyman Canyon (steep rocky n wall) Comment
  CLARK-A1528-2259  Plagiobothrys californicus John C. Roos 1952-2-29 5368 Riverside Reche Canyon 457 Comment
  UCSB45581  Plagiobothrys canescens Roos, John 1952-4-30 Riverside Hills between Camp Haan and Riverside 518 Comment
  RSA659769  Plagiobothrys canescens var. canescens J. C. Roos 1952-4-30 5605 Riverside Hills between Camp Haan and Riverside 518 Comment
  CLARK-A1528-2261  Plagiobothrys leptocladus John C. Roos 1966-3-24 Riverside Edgemont Comment
  UCR27420  Plagiobothrys parishii John C. Roos 1949-4-30 4270 San Bernardino Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  RSA78328  Plagiobothrys torreyi J. C. Roos 1951-6-9 5062 San Bernardino Running Springs 1829 Comment
  CLARK-A1528-5352  Plantago hirtella John C. Roos, Lucille Roos 1951-9-29 5309 San Bernardino San Bernardino 304 Comment
  POM251760  Plantago indica J. C. Roos 1937-11-1 6 San Bernardino Blue Jay Camp. San Bernardino Mts. Comment
  CLARK-A1528-3426  Plantago insularis John C. Roos 1949-3-26 4123 Riverside Indio Comment
  CLARK-A1528-3422  Plantago major John C. Roos 1950-5-13 4806 San Bernardino Rabbit Springs 883 Comment
  UCR23245  Plantago major John C. Roos 1950-5-13 4806 San Bernardino Southern Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  UCR25391  Plantago ovata John C. Roos 1937-4-23 777 San Bernardino Little San Bernardino Mtns/Southern Mojave Desert, near Morongo Pass Comment
  CLARK-A1528-3435  Plantago virginica John C. Roos 1938-6-12 San Bernardino Loma Linda 304 Comment
  RSA450201  Platanthera leucostachys J. C. Roos 1965-7-17 s.n. San Bernardino South Fork Meadows, San Bernardino Mountains. 2500 Comment
  UCSB37829  Platanthera sparsiflora Roos, John 1965-9-11 San Bernardino Mill Creek; San Bernardino Mtns Comment
  CLARK-A1528-5662  Platanus racemosa John C. Roos 1965-6-6 San Bernardino San Bernardino Mountains Comment
  RSA92598  Platystemon californicus J. C. Roos, L. Roos 1952-5-10 5647 San Bernardino Adelanto 915 Comment
  RSA155665  Pleuraphis jamesii J. C. Roos 1955-6-17 6404 Inyo 2 miles north of Willow Spring, Last Chance Mountains. 2011 Comment
  LA102219  Pleurocoronis pluriseta John C. Roos; 1966-3-10 sn Riverside Chuckwalla Mountains, 3 mi. SE of Desert Center Comment
  CLARK-A1528-2057  Pluchea purpurascens John C. Roos 1937-8-31 2561 San Diego San Clemente Comment
Read comments
Sep 20 2014
  UCR26067  Pluchea purpurascens John C. Roos 1949-10-1 4684 Orange South Coast, Doheny Beach 0 Comment
  CLARK-A1528-2059  Pluchea sericea John C. Roos 1947-3-1 3301 Imperial Fish Springs Comment
  RSA457389  Poa bigelovii J. C. Roos 1955-4-8 6310 Inyo Last Chance Mtns, E of Eureka Valley sand dunes. aklt 4300ft, Inyo County 1311 Comment
  UCR24068  Poa bigelovii John C. Roos 1955-4-8 6310 Inyo Last Chance Mtns, east of Eureka Valley sand dunes 1311 Comment
Read comments
Jun 5 2008
  UCR24069  Poa bigelovii John C. Roos 1955-4-6 6285 Inyo Northern Mojave Desert, mouth of Beveridge Canyon, east side of Inyo Mtns. 671 Comment
  UCSB45961  Poa bigelovii Roos, John 1955-4-8 Inyo Last Chance Mtns.; east of Eureka Valley sand dunes 1310 Comment
  CLARK-A1528-4819  Poa compressa John C. Roos, Lucille Roos 1950-7-5 4848 San Bernardino Loma Linda 323 Comment
  CLARK-A1528-4823  Poa fendleriana John C. Roos 1940-5-11 851 San Bernardino San Bernardino Mountains Comment
  POM261201  Poa fendleriana J. C. Roos 1941-5-30 104 San Bernardino Mouth of Coon Creek, San Bernardino Mts. Comment
  RSA47317  Poa fendleriana J. C. Roos 1949-6-19 4399 San Bernardino Southeastern base Clark Mtn. 1921 Comment
  RSA71378  Poa keckii J. C. Roos, L. Roos 1951-8-10 5149 Mono East face White Mtn. Peak, White Mountains. 4268 Comment
  CLARK-A1528-4825  Poa nervosa John C. Roos 1949-7-16 4548 San Bernardino San Bernardino Mountains Comment
  CAS-BOT-BC247400  Poa pratensis J. C. Roos 1965-6-26 s.n. San Bernardino Upper Santa Ana River near Heart Bar Park, San Bernardino Mtns. Comment
  CAS-BOT-BC247401  Poa pratensis J. C. Roos 1965-7-18 s.n. San Bernardino Moonridge, Bear Valley, San Bernardino Mtns. Comment
  RSA662433  Poa pratensis J. C. Roos 1965-7-18 s.n. San Bernardino Moonridge, Bear Valley, San Bernardino Mountains. Comment
  UCR24042  Poa pratensis John C. Roos 1940-8-3 1586 San Bernardino San Bernardino Mtns., Bluff Lake 2317 Comment
  UCR24052  Poa pratensis John C. Roos 1950-6-24 4846 San Bernardino San Bernardino Mtns., Boulder Bay, Bear Valley 2073 Comment
  CLARK-A1528-4832  Poa rupicola John C. Roos, Lucille Roos 1951-8-10 5158 Mono White Mountains 3962 Comment
  CLARK-A1528-4836  Poa scabrella John C. Roos 1937-5-1 Riverside Badlands Comment
  LA102211  Poa secunda John C. Roos; 1947-4-26 3694 San Bernardino San Bernardino Mountains, Mill Creek Canyon, near Igo's Comment
  RSA61545  Poa secunda J. C. Roos 1950-5-13 4808 San Bernardino Lucerne Valley, Rabbit Springs. Alt 2900ft 884 Comment
  UCR20621  Poa secunda John C. Roos 1950-5-13 4808 San Bernardino Southern Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  UCR25258  Poa secunda John C. Roos 1949-5-14 4310 San Bernardino Mojave Desert, Rabbit Springs Lucerne Valley 884 Comment
  UCR31655  Poa secunda John C. Roos, L. Roos 1951-8-8 5117 Inyo SE rim Reed Flat, White Mtns. 3079 Comment
  UCR31659  Poa secunda John C. Roos 1947-4-26 3594 San Bernardino San Bernardino Mtns, Igo's [Mountain Home Village], Mill Creek 1159 Comment
  LA102203  Poa secunda John C. Roos; Alfred R. Roos 1954-6-11 6127 Inyo Panamint Mountains, head of Wild Rose Canyon near Mahogany Flats 2468 Comment
  UC1023401  Poa secunda subsp. juncifolia J. C. and A. R. Roos 1953-8-11 6000 Inyo pass 3 mi e of Blue Bell Mine (on trail to Side Hill Spring); Inyo Mts 3078 Comment
  UCSB37845  Poa secunda subsp. juncifolia Roos, John; Roos, Lucille 1951-5-27 Los Angeles Flats between Lancaster and Rosamond, Mojave Desert 701 Comment
  CAS-BOT-BC243046  Poa secunda subsp. secunda J. C. Roos 1967-5-30 s.n. San Bernardino Ridge on the E end of Broom Flat, N of Onyx Peak, San Bernardino Mountains Comment
  POM263177  Poa wheeleri J. C. Roos 1939-5-26 713 San Bernardino Bluff Lake. Comment
  UC1010190  Polemonium chartaceum John and Lucille Roos 1951-8-10 5148 Mono White Mtn. Peak , White Mtn. Peak (White Mts.) 4297 Comment
  RSA0094953  Polemonium chartaceum John C. Roos 1960-7-4 s.n. Mono Crooked Creek, White Mtns. Comment
  CLARK-A1528-2456  Polycarpon tetraphyllum John C. Roos 1958-5-2 Los Angeles West Los Angeles Comment
  UCR23448  Polygala acanthoclada John C. Roos 1949-6-22 4453 San Bernardino Eastern Mojave Desert, Keystone Canyon, New York Mtns. 1829 Comment
  UCR30822  Polygonum douglasii subsp. spergulariiforme John C. Roos 1948-9-1 3941 Siskiyou Near Fort Jones 854 Comment
  POM263103  Polygonum kelloggii J. C. Roos 1937-7-27 327 San Bernardino Near Grout Bay, Bear Valley. Comment
  CLARK-A1528-761  Polygonum lapathifolium John C. Roos, Lucille Roos 1951-9-11 5200 San Bernardino Loma Linda 320 Comment
  RSA69863  Polygonum lapathifolium J. C. Roos, Lucille Roos 1951-9-11 5200 San Bernardino Loma Linda. 320 Comment
  CLARK-A1528-3791  Polygonum punctatum John C. Roos 1937-8-23 1784 San Bernardino Snow Creek Comment
  RSA450151  Polygonum punctatum J. C. Roos s.n. San Bernardino Victorville. Mojave River bottom. Comment
Read comments
Nov 20 2016
  RSA69864  Polygonum punctatum J. C. Roos, Lucille Roos 1951-9-11 5201 San Bernardino Loma Linda. 320 Comment
  UCR23346  Polypodium hesperium John C. Roos 1936-9-15 2512 Riverside San Jacinto Mountains, Devil's Slide Trail above Idyllwild. Comment
  CLARK-A1528-4844  Polypogon semiverticillatus John C. Roos 1942-5-22 Los Angeles Hollywood Comment
  CLARK-A1528-5599  Polystichum munitum John C. Roos 1937-7-3 Los Angeles La Canada Comment
  CLARK-A1528-4061  Populus tremuloides John C. Roos 1967-7-8 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4068  Populus tremuloides John C. Roos 1959-8-23 Mono White Mountains 3047 Comment
  RSA450105  Populus tremuloides J. C. Roos 1937-6-11 s.n. San Bernardino Fish Creek. Comment
  UCR24382  Populus tremuloides John C. Roos 1965-6-26 s.n. San Bernardino San Bernardino Mtns., Upper Santa Ana River Comment
  GH376988  Portulaca halimoides J. C. Roos 1950-9-1 4951 Unknown Valley Wells, eastern Mohave Desert 1127 Comment
  POM263056  Potamogeton illinoensis J. C. Roos 1937-5-29 50929 San Bernardino Along a flume on hillside, Deep Creek, N slope of San Bernardino Mts. Comment
  POM251775  Potamogeton pusillus J. C. Roos 1937-7-28 16 San Bernardino Holcomb Valley, San Bernardino Mtns. Comment
  UCR23514  Potentilla biennis John C. Roos 1937-8-5 1025 Inyo White Mtns., White Mtns. Comment
  POM263253  Potentilla drummondii J. C. Roos 1937-8-8 537 Inyo Lone Pine Canyon. 2744 Comment
  UCR23462  Potentilla gracilis John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, Moonridge, Bear Valley 2226 Comment
  UCR23516  Potentilla gracilis John C. Roos 1940-7-17 1860 San Bernardino San Bernardino Mtns, Green Valley 2195 Comment
  CLARK-A1528-4022  Potentilla saxosa John C. Roos 1942-5-1 1151 San Bernardino Joshua Tree National Monument Comment
  UCR18836  Potentilla saxosa John C. Roos 1949-6-27 4505 San Bernardino Eastern Mojave Desert, north side of Kingston Mountains 1982 Comment
  UCR19201  Primula suffrutescens John C. Roos 1965-8-9 s.n. Inyo Sierra Nevada Mountains, Heart Lake, Independence Creek area 3300 Comment
  CLARK-A1528-3400  Proboscidea parviflora John C. Roos 1959-8-5 San Bernardino Loma Linda Comment
  UCR30612  Prosopis glandulosa John C. Roos, A. R. Roos 1950-8-7 s.n. Inyo Northern Mojave Desert, Tecopa in Amargosa River Valley 427 Comment
  CLARK-A1528-2869  Prosopis glandulosa var. torreyana John C. Roos 1946-9-2 2985 San Bernardino San Timoteo Canyon Comment
  RSA450124  Prosopis glandulosa var. torreyana J. C. Roos 1965-7-11 s.n. Inyo Warm Springs, Furnace Creek, Death Valley Comment
  UCR26122  Prunus John C. Roos 1950-2-25 4708 San Bernardino San Bernardino Valley, Santa Ana River wash at Orange St. bridge north of Redlands 396 Comment
  CLARK-A1528-4026  Prunus andersonii John C. Roos 1949-6-18 4391 San Bernardino Clark Mountain 1828 Comment
  UC1236236  Prunus andersonii John C. Roos 1955-5-15 6370 Inyo Willow Spring Last Chance Mountains 1828 Comment
  RSA78209  Prunus fremontii J. C. Roos, L. Roos 1953-3-21 5908 Riverside Mouth of Andreas Canyon, south of Palm Springs. 274 Comment
  UCR20437  Prunus fremontii John C. Roos, L. Roos 1953-3-21 5908 Riverside Sonoran (Colorado) Desert, Mouth of Andreas Canyon south of Palm Springs 274 Comment
  POM262889  Prunus subcordata J. C. Roos 1939-3-31 307 Napa Angwin. Howell Mtns. Comment
  CLARK-A1528-4035  Prunus virginiana subsp. demissa John C. Roos 1946-10-1 2991 San Bernardino Oak Glen Comment
  RSA450255  Prunus virginiana var. demissa J. C. Roos 1965-7-3 s.n. Riverside Dark Canyon, north fork of San Jacinto River. Comment
  UCR23508  Prunus virginiana var. demissa John C. Roos, L. Roos 1956-5-26 6581 San Bernardino San Bernardino Mtns., Oak Glen school 1433 Comment
  CLARK-A1528-4851  Psathyrotes ramosissima John C. Roos 1947-2-1 3227 Riverside Painted Canyon Comment
  RSA47448  Pseudostellaria jamesiana J. C. Roos, L. Roos 1949-7-16 4552 San Bernardino Moonridge, Bear Valley 2226 Comment
  CLARK-A1528-3632  Pseudotsuga macrocarpa John C. Roos 1965-12-11 San Bernardino San Bernardino Mountains 1097 Comment
  CLARK-A1528-2070  Psilostrophe cooperi John C. Roos 1937-8-25 2024 San Bernardino East Mojave Desert Comment
  CLARK-A1528-2071  Psilostrophe cooperi John C. Roos 1949-6-22 4457 San Bernardino New York Mountains 1523 Comment
  RSA659787  Psoralea macrostachya J. C. Roos 1948-1-31 3769 San Bernardino Bear Valley, by the canal at the mouth of [Plunge?] Creek. Comment
  UCR25913  Psoralea macrostachya John C. Roos 1948-1-31 3769 San Bernardino San Bernardino Valley/San Bernardino Mtns. Foothills, by the canal at the mouth of Plunge Creek 488 Comment
  CLARK-A1528-2874  Psoralea orbicularis John C. Roos 1937-6-6 1846 San Bernardino Comment
  UCR18871  Psoralea rigida John C. Roos 1965-7-31 s.n. San Bernardino San Bernardino Mtns, Camp Oceola, Barton Flats 2195 Comment
  UCR25914  Psoralea rigida John C. Roos 1949-7-16 4546 San Bernardino San Bernardino Mtns., near Greenspot, Bear Valley 2134 Comment
  CAS-BOT-BC340855  Psorothamnus polydenius John Roos; Lucille Roos 1954-6-28 6178 Inyo Southeast end Eureka Valley 914 Comment
  CLARK-A1528-5208  Pterostegia drymarioides John C. Roos 1952-3-19 5397 Riverside Box Springs Mountains Comment
  CLARK-A1528-4847  Puccinellia simplex John C. Roos 1950-4-6 4723 San Bernardino Rabbit Spring 883 Comment
  UCR18627  Pulicaria paludosa John C. Roos 1962-10-19 s.n. Riverside Western Colorado Desert/ San Bernardino Mtns., Whitewater 549 Comment
  UC1236248  Purshia mexicana var. stansburyana John C. Roos 1955-5-13 6342 Inyo e of Eureka Valley sand dunes (w base of Last Chance Mountains); Last Chance Mountains 1219 Comment
  RSA40577  Purshia stansburyana J. C. Roos 1947-7-14 2879 Inyo Mahogany Flats. Panamint Mtns. 2470 Comment
  CAS-BOT-BC158634  Purshia tridentata var. glandulosa John Roos; Lucille Roos 1951-8-12 5187 Inyo Rocky south slope 1 mile south of Reed Flat, White Mts. 2956 Comment
  UCR34462  Pyrola dentata John C. Roos 1937-7-23 344 San Bernardino San Bernardino Mountains, Fish Creek, upper Santa Ana River 1982 Comment
  CLARK-A1528-2684  Pyrola picta John C. Roos 1965-7-17 San Bernardino San Bernardino Mountains 2590 Comment
  CLARK-A1528-3052  Pyrola picta John C. Roos 1943-6-28 2707 San Bernardino San Bernardino Mountains Comment
  LA102352  Pyrrocoma racemosa var. paniculata Alfred R. Roos; 1950-8-7 sn Inyo Amargosa River Valley, Tecopa Hot Springs, about 2 mi. N of Tecopa 426 Comment
  CLARK-A1528-5329  Quercus X morehus John C. Roos 1956-6-5 6585 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-5330  Quercus X morehus John C. Roos 1965-6-13 San Bernardino San Bernardino Mountains Comment
  POM262790  Quercus X morehus J. C. Roos 1939-4-16 281 Napa Angwin, Howell Mtn. Comment
  RSA450193  Quercus agrifolia A. R. Roos 1937-12-15 s.n. Los Angeles Sepulveda Canyon Comment
  UCR23312  Quercus berberidifolia John C. Roos, L. Roos 1952-11-1 5907 San Bernardino San Bernardino Valley, hills 1 mi south of Loma Linda 366 Comment
  CLARK-A1528-2917  Quercus douglasii John C. Roos 1937-7-4 1420 Santa Barbara Cuyama Valley Comment
  UCSB42156  Quercus engelmannii Roos, John 1965-10-10 San Diego 5 miles NE of Fallbrook Comment
  CLARK-A1528-2925  Quercus garryana var. breweri John C. Roos 1939-7-6 1516 Shasta Redding Comment
  POM266347  Quercus kelloggii J. C. Roos 1942-4-25 1072 San Bernardino Cedar Springs, north side of San Bernardino Mts. 1067 Comment
  CLARK-A1528-4986  Quercus kelloggii John C. Roos 1936-5-3 San Diego Comment
  CLARK-A1528-5331  Quercus turbinella John C. Roos 1949-6-22 4452 San Bernardino New York Mountains 1737 Comment
  CLARK-A1528-2907  Quercus wislizeni var. frutescens John C. Roos 1947-4-26 3597 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-2909  Quercus wislizeni var. frutescens John C. Roos 1940-5-11 850 San Bernardino San Bernardino Mountains 1219 Comment
  CLARK-A1528-2914  Quercus wislizeni var. frutescens John C. Roos 1952-4-13 5518 Riverside Box Springs Mountains 518 Comment
  POM262922  Quercus wislizeni var. frutescens J. C. Roos 1937-8-11 481 Kern Tehachapi Pass Comment
  RSA40564  Quercus wislizeni var. frutescens J. C. Roos 1947-1-4 s.n. Riverside North side Box Springs Mts, above Reche Canyon 488 Comment
Read comments
Jul 8 2017
  UC1010264  Quercus wislizeni var. frutescens John C. Roos 1952-4-13 5518 Riverside Box Springs Mts. 518 Comment
  UCSB42158  Quercus wislizeni var. wislizeni Roos, John 1965-8-21 Tulare Middle fork of the Kaweah River, west of Sequoia National Park Comment
  RSA92599  Rafinesquia californica J. C. Roos, Lucille Roos 1952-5-11 5649 San Bernardino Scott's Canyon, 2.5 miles southeast of Loma Linda. 427 Comment
  UCR18908  Ranunculus aquatilis John C. Roos 1937-7-28 s.n. San Bernardino San Bernardino Mtns, Holcomb Valley 2043 Comment
  UCR23458  Ranunculus cymbalaria John C. Roos 1946-9-21 3062 San Bernardino Mojave Desert, Rabbit Springs, Lucerne Valley 887 Comment
  RSA450092  Ranunculus cymbalaria var. saximontanus J. C. Roos 1965-6-26 s.n. San Bernardino Upper Sana Ana Canyon, Heart Bar area. Comment
  UCR18914  Ranunculus eschscholtzii var. oxynotus John C. Roos 1946-9-4 2948 San Bernardino San Bernardino Mtns., San Gorgonio Ridge 3445 Comment
  UCR23459  Reseda alba John C. Roos 1937-8-31 2563 San Diego South Coast, Oceanside Comment
  CLARK-A1528-3906  Rhamnus californica John C. Roos 1937-6-11 # 502 San Diego Dulzura Comment
  UCR23636  Rhododendron occidentale John C. Roos 1957-7-2 6645 Sonoma Miller Ridge Comment
  UCR18646  Rhus aromatica John C. Roos 1950-8-4 s.n. San Bernardino Eastern Mojave Desert, north side of Clark Mountain 1220 Comment
  CLARK-A1528-1410  Rhus integrifolia John C. Roos 1949-2-13 4083 Los Angeles Whittier Comment
  CLARK-A1528-1411  Rhus integrifolia John C. Roos 1950-2-18 4707 Riverside Box Springs Mountains 774 Comment
  CLARK-A1528-5597  Rhus integrifolia John C. Roos 1950-2-25 4709 San Bernardino Santa Ana River 396 Comment
  CLARK-A1528-4115  Ribes amarum John C. Roos 1942-4-18 1085 Los Angeles San Gabriel Mountains Comment
  UCR23251  Ribes californicum var. hesperium John C. Roos 1965-6-19 s.n. Riverside Peninsular Range; Santa Ana Mtns, Sky Line Drive, south of Corona Comment
  CLARK-A1528-4124  Ribes cereum John C. Roos, Lucille Roos 1954-6-29 6190 Inyo Inyo Mountains Comment
  CLARK-A1528-4127  Ribes cereum John C. Roos 1946-8-27 2782 Riverside Santa Rosa Mountains Comment
  CLARK-A1528-4130  Ribes indecorum John C. Roos 1952-2-29 5360 Riverside Box Springs Mountains 487 Comment
  RSA664942  Ribes indecorum J. C. Roos 1946-12-27 3194 San Bernardino Reche Canyon. Comment
  CAS-BOT-BC173433  Ribes malvaceum J. C. Roos 1966-2-11 s.n. Los Angeles Claremont 304 Comment
  CLARK-A1528-1298  Ribes malvaceum var. viridifolium John C. Roos 1943-3-20 2598 Los Angeles Santa Monica Mountains Comment
  POM302497  Ribes montigenum J. C. Roos 1943-7-4 2715 San Bernardino Sugarloaf Peak, San Bernardino mts. 2896 Comment
  RSA450232  Ribes montigenum J. C. Roos 1965-7-10 s.n. Inyo Arcane Meadow near Telescope Peak, Panamint Mtns. Comment
  CLARK-A1528-4143  Ribes roezlii John C. Roos 1940-5-11 844 San Bernardino San Bernardino Mountains Comment
  POM262780  Ribes roezlii J. C. Roos 1939-5-26 711 San Bernardino Bluff Lake, San Bernardino Mountains 2287 Comment
  CLARK-A1528-4156  Ribes velutinum John C. Roos 1948-7-3 3900 Inyo Panamint Mountains Comment
  RSA41273  Ribes velutinum J. C. Roos 1941-8-17 60 Inyo Baldy Peak, Panamint Mts. 2683 Comment
  UC1236238  Ribes velutinum John C. Roos 1955-5-15 6368 Inyo 0.5 mi w Willow Springs; Last Chance Mts. 1767 Comment
  UCR19224  Ribes velutinum John C. Roos 1949-6-27 4503 San Bernardino Eastern Mojave Desert, Kingston Mountains 1982 Comment
  RSA0049511  Ribes velutinum J. C. Roos 1965-7-10 s.n. Inyo N.E. slope of Telescope Peak, Panamint Mtns. Comment
  CLARK-A1528-2711  Ricinus communis John C. Roos 1937-9-5 2554 San Bernardino Loma Linda Comment
  CLARK-A1528-443  Ricinus communis John C. Roos 1951-10-4 5317 San Bernardino San Bernardino 320 Comment
  CLARK-A1528-4041  Rosa woodsii John C. Roos 1947-7-12 2837 Inyo Panamint Mountains Comment
  CLARK-A1528-4040  Rosa woodsii var. glabrata John C. Roos 1946-9-21 3047 San Bernardino San Bernardino Mountains 1219 Comment
  CAS-BOT-BC148010  Rubus leucodermis J. C. Roos 1965-7-17 s.n. San Bernardino Barton Flats, San Bernardino Mtns. Comment
  POM263029  Rubus leucodermis J. C. Roos 1937-7-16 374 Los Angeles Stockton Flats, San Gabriel Mountains. Comment
Read comments
Feb 4 2014
  UCSB37348  Rubus parviflorus Roos, John 1965-7-3 Riverside Dark Canyon, San Jacinto Mtns Comment
  UCR25812  Rumex conglomeratus John C. Roos 1952-6-10 5759 Riverside San Bernardino Valley Region, Fairmont Park in Riverside, edge of lake 259 Comment
  CLARK-A1528-3802  Rumex salicifolius John C. Roos 1937-7-22 1170 San Bernardino South Fork Meadows Comment
  CLARK-A1528-1001B  Rumex triangulivalvis John C. Roos 1937-7-29 1982 San Bernardino Bluff Lake 2316 Comment
  RSA44862  Ruta chalepensis J. C. Roos 1948-2-21 3771 Riverside Near spring with Baccharis wiminea and Emoryi, pass between Pigeon Pass and Reche Canyon. 457 Comment
  RSA450476  Salazaria mexicana J. C. Roos 1965-6-13 s.n. Riverside Santa Rosa Mountains: Dos Palmas Springs. Comment
  SEINET13947224 Image available Salazaria mexicana J. C. Roos 1965-1 s.n. Riverside Dos Palmas Springs, Santa Rosa Mountains Comment
  RSA85091  Salix gooddingii J. C. Roos 1952-4-4 5470 San Bernardino Warm Creek bottomland at Colton. 290 Comment
Read comments
Dec 3 2014
  CLARK-A1528-4054  Salix hindsiana var. leucodendroides John C. Roos 1937-5-23 617 Riverside Riverside Comment
  CLARK-A1528-5200  Salix hindsiana var. leucodendroides John C. Roos, Lucille Roos 1952-3-1 5382 Riverside Moreno 609 Comment
  CLARK-A1528-5201  Salix hindsiana var. leucodendroides John C. Roos, Lucille Roos 1952-3-1 5382 Riverside Moreno Comment
  RSA659608  Salix laevigata J. C. Roos 1952-2-18 5351 Riverside At west end of Fairmount Park, Riverside. 259 Comment
  CLARK-A1528-4057  Salix lasiolepis John C. Roos 1949-8-14 San Bernardino New York Mountains 1706 Comment
  CLARK-A1528-4060  Salix scouleriana John C. Roos 1937-7-16 620 Los Angeles San Gabriel Mountains Comment
  CAS-BOT-BC403762  Salpichroa origanifolia J. C. Roos 1965-6-29 s.n. San Bernardino Bloomington Comment
  RSA79486  Salsola tragus J. C. Roos, A. Roos 1953-8-13 6008 Inyo Tamarack Canyon. 2744 Comment
  CLARK-A1528-3110  Salvia dorrii subsp. dorrii John C. Roos, Lucille Roos 1952-7-30 5859 Inyo White Mountains 3078 Comment
  CLARK-A1528-3111  Salvia dorrii subsp. dorrii Alfred R. Roos, John C. Roos 1953-8-9 5947 Inyo Inyo Mountains 2682 Comment
  RSA45219  Salvia dorrii subsp. dorrii J. C. Roos 1949-5-14 4300 San Bernardino 5 miles west of The Windmill; Burns-Pipes Wash, east end San Bernardino Mts. 1220 Comment
  RSA79656  Salvia dorrii subsp. dorrii J. C. Roos 1953-8-9 5947 Inyo Tamarack Canyon, Inyo Mts. 2683 Comment
  RSA444482  Salvia eremostachya J. C. Roos 1947-3-15 3332 Riverside Santa Rosa Mountains: Dos Palmas Springs, NE of Asbestos Mt. Comment
  RSA85131  Salvia funerea J. C. Roos 1954-3-27 6057 Inyo Titus Canyon below Klare Spring, Grapevine Mts. Death Valley. 915 Comment
  CLARK-A1528-3118  Salvia greatae John C. Roos 1949-3-19 4101 Riverside Orocopia Mountains Comment
  CLARK-A1528-5697  Salvia greatae John C. Roos 1963-9-9 Riverside Orocopia Mountains Comment
  RSA659478  Salvia greatae J. C. Roos 1958-3-29 s.n. Riverside Salt Creek Wash, 3 miles N of Coachella Canal on E base of Orocopia Mtns. 305 Comment
  SD88277  Salvia greatae John Roos, Lucille Roos 1949-4-6 4154 Imperial Document only. Mouth of rocky canyon, south foot Chocolate Mountains, north of Pope. 91 Comment
Read comments
Sep 13 2015
  CLARK-A1528-3122  Salvia mohavensis John C. Roos 1965-6-23 Riverside Lost Palms Canyon Comment
  CLARK-A1528-4964  Salvia mohavensis John C. Roos 1947-2-15 3234 Riverside Eagle Mountains Comment
  CLARK-A1528-2413  Sambucus microbotrys John C. Roos 1965-8-9 Inyo Sierra Nevada Range Comment
  CLARK-A1528-7827  Samolus parviflorus John C. Roos 1937-6-19 23 Riverside Murrieta Comment
  CLARK-A1528-4858  Sanicula bipinnatifida John C. Roos 1937-4-17 1380 San Bernardino Redlands Comment
  RSA85102  Sanicula bipinnatifida J. C. Roos 1952-4-29 5599 Riverside Reche Canyon 457 Comment
  UCR19705  Sanvitalia abertii John C. Roos, A. R. Roos 1950-8-5 4893 San Bernardino Eastern Mojave Desert, 1 mi south of Coloseum Mine, Clark Mountain 1646 Comment
  RSA100183  Sanvitalia procumbens J. C. Roos, Lucille Roos 1954-7-26 6204 Riverside In unused corner of dry garden, 6th Street near Pepper. In E. C. Jaeger's yard? 274 Comment
  UCR28722  Saponaria officinalis John C. Roos 1948-9-2 4019 Siskiyou Hills just north of Shasta City. Comment
  UCR19024  Sarcobatus vermiculatus John C. Roos 1950-5-13 4802 San Bernardino Southern Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  UCR23407  Sarcostemma cynanchoides John C. Roos 1940-6-24 1896 San Bernardino San Bernardino Valley, Loma Linda Hills 457 Comment
  CLARK-A1528-1470  Sarcostemma hirtellum John C. Roos 1947-4-18 3449 San Bernardino Cronise Lake Comment
  CLARK-A1528-4864  Sarcostemma hirtellum John C. Roos 1937-4-27 553 San Bernardino Needles Comment
  CLARK-A1528-5534  Schismus barbatus John C. Roos 1950-4-17 4744 San Bernardino Loma Linda 335 Comment
  UCR25195  Schismus barbatus John C. Roos, L. Roos 1951-3-24 5033 Riverside San Bernardino Valley, Riverside, Mount Rubidoux 396 Comment
  UCSB51363  Schismus barbatus Roos, John 1965-6-6 San Bernardino Mill Creek near Fallsvale, San Bernardino Mtns. Comment
  RSA658763  Schismus barbatus J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek. San Bernardino Mountains. Comment
  RSA52785  Schkuhria multiflora var. multiflora J. C. Roos 1950-9-1 4955 San Bernardino Coliseum Mine, Clark Mountain. 1616 Comment
  UCR20387  Scrophularia desertorum John C. Roos, A. R. Roos 1953-8-14 6026 Inyo Inyo Mtns., Al Rose Canyon 2500 Comment
  UCR24172  Sedum rosea John C. Roos 1965-8-8 s.n. Fresno Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park 3354 Comment
  CAS-BOT-BC63892  Sedum spathulifolium A. R. Roos 1965-6-28 s.n. San Bernardino Mill Creek Canyon, San Bernadino Mtns. At Igo's. Comment
  UCR23336  Selaginella cinerascens John C. Roos 1937-6-16 1229 San Diego Peninsular Range, Hodges Lake 137 Comment
Read comments
Sep 19 2013
  UCR19242  Selaginella watsonii John C. Roos 1965-7-17 s.n. San Bernardino San Bernardino Mountains, San Gorgonio Wilderness Area near Dry Lake 2774 Comment
  CLARK-A1528-2078  Senecio astephanus John C. Roos 1952-6-14 5771 San Bernardino Mountain Home Village 1158 Comment
  UCR19257  Senecio flaccidus var. monoensis John C. Roos 1947-11-1 3757 Riverside Sonoran (Colorado) Desert, Eagle Mtns, Lost Palms Canyon 976 Comment
  CLARK-A1528-2085  Senecio jacobaea John C. Roos 1957-7-1 6625 Mendocino Fort Bragg Comment
  RSA71755  Senecio multilobatus J. C. Roos, Lucille Roos 1951-8-8 5101 Mono Big Prospector Meadow, White Mountains. 3201 Comment
  UCR34450  Senecio scorzonella John C. Roos 1948-9-7 4009 Tuolumne Sierra Nevada Mtns, Yosemite National Park, NE of Tuolumne Meadows 2744 Comment
  UCR24164  Senecio spartioides John C. Roos 1946-9-15 3038 San Bernardino San Bernardino Mtns, south face of Mt. Jepson, on San Gorgonio Peak Trail 3171 Comment
  RSA0013666  Senecio spartioides J. C. Roos, Lucille Roos 1951-8-8 5102 Mono Big Prospector Meadow at head of Crooked Creek, White Mountains. 3171 Comment
  RSA0013668  Senecio spartioides J. C. Roos 1941-8-27 s.n. San Bernardino Above Dollar Lake, San Bernardino Mts. 3201 Comment
  CLARK-A1528-2165  Senecio uintahensis John C. Roos 1951-8-8 5101 Mono White Mountains 3200 Comment
  CAS-BOT-BC438164  Sesuvium verrucosum J. C. Roos 1955-7-24 6524 Inyo 0.5 mile east of Olancha at south end Owens Lake. 1097 Comment
  CAS-BOT-BC240159  Setaria verticillata John C. Roos 1952-5-14 5660 Riverside Corner Iowa Ave. and 8th Street east of Riverside 304 Comment
  UCR19304  Setaria verticillata John C. Roos 1965-8-5 s.n. San Bernardino San Bernardino Valley, Loma Linda 305 Comment
  CLARK-A1528-5190  Sherardia arvensis John C. Roos 1948-4-21 3776 San Bernardino Loma Linda Comment
  POM264156  Sibbaldia procumbens J. C. Roos 1937-8-8 535 Inyo Lone Pine Canyon. 2744 Comment
  UCR25189  Sidalcea hirsuta John C. Roos, Lucille Roos 1951-5-26 5044 Mariposa Sierra Nevada Mtns, hills about 7 miles east of Mariposa 1037 Comment
  UCR18960  Silene andersonii John C. Roos 1941-8-17 59 Inyo Northern Mojave Desert, Panamint Mountains 3319 Comment
  CLARK-A1528-2463  Silene antirrhina John C. Roos 1941-4-25 177 Riverside Reche Canyon Comment
  POM262967  Silene antirrhina J. C. Roos 1941-04 153 San Bernardino Hills near Loma Linda, on burn. Comment
Read comments
Apr 1 2014
  UCR23679  Silene californica John C. Roos 1957-6-29 6618 Sonoma North Coast Ranges, Fitch Mtn, near Healdsburg 59 Comment
  UCR23654  Silene conoidea John C. Roos 1967-4-30 s.n. San Bernardino San Bernardino Valley, Loma Linda 396 Comment
  RSA591748  Silene conoidea J. C. Roos 1967-4-30 s.n. San Bernardino Loma Linda. Comment
  UC1023385  Silene menziesii John and Lucille Roos 1952-7-30 5866 Mono Crooked Creek , Crooked Creek (White Mts.) 2865 Comment
  UCR23653  Silene menziesii John C. Roos 1958-7-26 s.n. San Bernardino San Bernardino Mtns, South Fork of the Santa Ana River Comment
  UCSB42108  Silene parishii Roos, John 1966-8-6 San Bernardino Fish Creek, San Bernardino Mtns. 2316 Comment
  CLARK-A1528-4907  Silene parishii var. viscida John C. Roos 1947-9-6 3744 Riverside San Jacinto Mountains Comment
  RSA47441  Silene verecunda subsp. andersonii J. C. Roos, L. Roos 1949-6-27 4520 San Bernardino North slope of Kingston Mts. 1768 Comment
  RSA443542  Simmondsia chinensis J. C. Roos 1966-3-20 s.n. Riverside Eagle Mts., Last Palms Canyon. Comment
  UC1043021  Sisymbrium altissimum John and Lucille Roos 1952-5-17 5682 San Bernardino Mohave Desert, near junction of Highways 395 and 66 Mohave Desert 1005 Comment
  RSA85148  Sisymbrium altissimum J. C. Roos 1952-5-7 5613 Riverside Box Springs Mountains, north of Canyon Crest Heights 457 Comment
  CLARK-A1528-5642  Sisymbrium murale John C. Roos 1943-4-11 2603 San Bernardino San Bernardino County Hospital Comment
  CLARK-A1528-3031  Sisyrinchium bellum John C. Roos 1947-4-20 3500 Inyo Death Valley 76 Comment
  CLARK-A1528-5040  Sitanion hystrix John C. Roos 1965-6-16 San Bernardino Cajon Pass Comment
  CLARK-A1528-5539  Sitanion hystrix John C. Roos 1946-9-4 2956 San Bernardino San Bernardino Mountains 3383 Comment
  CLARK-A1528-5041  Sitanion longifolium Alfred R. Roos 1948-6-11 San Bernardino Mountain Pass Comment
  UCR20610  Sitanion longifolium John C. Roos 1947-7-13 2890 Inyo Panamint Mtns, Near Arcane Meadows, south of Baldy Peak 3018 Comment
  UCR19119  Smilacina stellata John C. Roos 1960-7-4 s.n. Mono White Mtns, Crooked Creek 3293 Comment
  UCR26199  Solanum triflorum John C. Roos 1949-6-25 4489 San Bernardino Eastern Mojave Desert, around buildings at Coloseum Mine, Clark Mountain 1616 Comment
  CLARK-A1528-4373  Solanum umbelliferum John C. Roos 1937-3-26 1342 Santa Barbara Comment
  RSA44915  Solanum umbelliferum J. C. Roos 1947-5-24 3646 Riverside Steep sandy road-fill, south of Banning 1159 Comment
  UCR25378  Solidago californica John C. Roos 1949-8-13 4603 San Bernardino Eastern Mojave Desert, Copper Queen Mine, Keystone Canyon, New York Mtns 1829 Comment
  CLARK-A1528-5240  Solidago californica John C. Roos 1948-11-26 4078 Mariposa Mariposa 1097 Comment
  POM266281  Solidago confinis J. C. Roos 1938-4-17 1637 Inyo Furnace Creek Spring, Death Valley. Comment
  CLARK-A1528-2095  Solidago occidentalis John C. Roos 1946-10-2 San Bernardino San Bernardino 304 Comment
  RSA89866  Soliva sessilis J. C. Roos, Lucille Roos 1953-5-9 5916 Riverside Riverside, Fairmont Park. 259 Comment
  UCR19714  Soliva sessilis John C. Roos, L. Roos 1953-5-9 5916 Riverside Riverside, Fairmont Park 259 Comment
  RSA449939  Soliva sessilis A. R. Roos 1958-5-16 s.n. Los Angeles City of Los Angeles, lawn of the Ambassador Hotel, Wilshire Blvd. Comment
  CLARK-A1528-5278  Sorghum halepense Alfred R. Roos 1941-6-15 San Diego San Diego Comment
  UCR19372  Sorghum halepense John C. Roos 1965-10-25 s.n. Riverside Coachella Valley, Coachella, south of Indio -8 Comment
  CLARK-A1528-5254  Sorghum sudanense Alfred R. Roos 1936-11-11 Riverside Riverside 243 Comment
  CLARK-A1528-2475  Spergularia bocconi John C. Roos 1966-3-13 Riverside Winchester Comment
  UCR25932  Spergularia marina John C. Roos, L. Roos 1951-10-24 5337 Riverside Santa Ana River, at Pedley 229 Comment
  CLARK-A1528-2480  Spergularia villosa John C. Roos 1937-6-13 640 San Diego San Ysidro Comment
  CLARK-A1528-3245  Sphaeralcea ambigua John C. Roos 1947-2-15 3240 Riverside Eagle Mountains Comment
  CAS-BOT-BC339938  Sphaeromeria cana John Roos; Lucille Roos 1947-9-19 2797 Inyo Rocky summit of Telescope Peak, Panamint Mts. 3365 Comment
  LA102218  Sphaeromeria cana John C. Roos; 1948-9-7 4001 Mono Sierra Nevada, Tioga Pass 2743 Comment
  CLARK-A1528-1459  Sphenosciadium capitellatum John C. Roos 1937-7-22 1680 San Bernardino San Bernardino Mountains Comment
  UCR18923  Spiraea densiflora John C. Roos 1948-7-9 4002 Mono Sierra Nevada Mtns., Ellery Lake at Tioga Pass 2744 Comment
  CLARK-A1528-5035  Sporobolus airoides John C. Roos 1937-7-4 1919 Santa Barbara Cuyama Valley Comment
  RSA89983  Sporobolus contractus J. C. Roos 1950-9-3 4982 San Bernardino Mountain Pass, Clark Mountains, E Mojave Desert 1524 Comment
  CAS-BOT-BC235450  Sporobolus cryptandrus John C. Roos 1950-9-1 4948 San Bernardino Valley Wells Station, Mojave Desert 1127 Comment
  POM266616  Sporobolus cryptandrus A. R. Roos 1936-9-2 1539 San Bernardino Santa Ana River Bed, Seven Oaks Comment
  RSA78223  Sporobolus cryptandrus J. C. Roos 1952-10-18 5902 Riverside Hidden Valley Campground 1220 Comment
  RSA85162  Sporobolus cryptandrus J. C. Roos, A. R. Roos 1950-8-5 4897 San Bernardino north slope Clark Mts. about 1 1/2 miles S.W. of Coliseum Mine, eastern Mojave Desert. 1706 Comment
  UC1023415  Sporobolus cryptandrus J. C. and A. R. Roos 1950-8-6 4909 San Bernardino between Horse Spring and Beck's Spring (Tecopa Pass); Kingston Mts., Tecopa Pass 1524 Comment
  UCR24377  Sporobolus cryptandrus John C. Roos 1965-8-15 s.n. Riverside Gilman Hot Springs 610 Comment
  UCR26327  Sporobolus cryptandrus John C. Roos 1949-6-18 3550 San Bernardino Eastern Mojave Desert, SE base of Clark Mountain 1829 Comment
  CLARK-A1528-5048  Sporobolus flexuosus John C. Roos 1946-9-14 3021 Riverside Asbestos Mountain 1066 Comment
  CLARK-A1528-5313  Sporobolus poiretii John C. Roos, Lucille Roos 1951-9-25 5277 Riverside Riverside 259 Comment
  CLARK-A1528-4919  Stachys ajugoides var. rigida John C. Roos 1937-5-10 614 San Diego San Juan Capistrano Comment
Read comments
Nov 9 2016
  CAS-BOT-BC60860  Stanleya elata J. C. Roos 1955-6-21 6465 Inyo Willow Creek, west slope Last Chance Mountains. 1615 Comment
  UC1080613  Stanleya pinnata John C. Roos 1955-5-13 6366 Inyo w side Eureka Valley at mouth Marble Canyon; w side Eureka Valley at mouth Marble Canyon 1036 Comment
  UCR24596  Stanleya pinnata John C. Roos, L. Roos 1954-6-28 6177 Inyo Northern Mojave Desert, SE end of Eureka Valley 915 Comment
  RSA155696  Stanleya pinnata J. C. Roos 1955-6-21 6466 Inyo Willow Creek, W side Last Chance Mtns 1585 Comment
  UC1236262  Stanleya pinnata John C. Roos 1955-5-16 6391 Inyo Waucoba Road 6 mi e Big Pine; w side Inyo Mts., e of Big Pine 1493 Comment
  UCR23435  Stanleya pinnata var. inyoensis John C. Roos 1955-5-13 6353 Inyo Northern Mojave Desert, SE end of Eureka Valley 945 Comment
  RSA93485  Stanleya pinnata var. inyoensis J. C. Roos, L. Roos 1954-6-28 6177 Inyo Base of sand dunes, SE end Eureka Valley. 914 Comment
  UCR23707  Stellaria calycantha John C. Roos 1937-8-18 2530 Riverside San Jacinto Mtns, Round Valley 2744 Comment
  CLARK-A1528-2481  Stellaria longipes John C. Roos 1965-6-26 San Bernardino San Bernardino Mountains Comment
  RSA591732  Stellaria longipes J. C. Roos, A. C. Sanders 1965-6-26 s.n. San Bernardino Upper Sana Ana Canyon, Heart Bar area. Comment
  CLARK-A1528-2488  Stellaria media John C. Roos 1952-2-27 5356 San Bernardino Loma Linda 335 Comment
  UCSB51361  Stenotaphrum secundatum J. C. Roos 1965-6-27 San Bernardino collected in Loma Linda Loma Linda 304 Comment
  CAS-BOT-BC375027  Stenotus acaulis J. C. Roos 1955-6-19 6445 Inyo Summit ridge Last Chance Mountains 2 miles west of Last Chance Spring 2529 Comment
  RSA71758  Stenotus acaulis J. C. Roos, Lucille Roos 1951-8-8 5103 Mono Big Prospector Meadow at head of Crooked Creek, White Mtns. 3201 Comment
  CAS-BOT-BC375126  Stephanomeria cichoriacea J. C. Roos 1965-10-2 s.n. San Bernardino East Fork Mtn Home Canyon, San Bernardino Mtns. Comment
  CLARK-A1528-2105  Stephanomeria cichoriacea John C. Roos 1937-7-16 392 San Bernardino San Gabriel Mountains Comment
  POM263096  Stephanomeria cichoriacea J. C. Roos 1937-7-16 392 San Bernardino Above Stockton Flats. San Gabriel Mountains. Comment
  UCR24208  Stephanomeria parryi John C. Roos 1937-5-30 2496 San Bernardino Mojave Desert, Hesperia Comment
  CLARK-A1528-1997  Stephanomeria spinosa John C. Roos 1955-7-23 6509 Inyo Inyo Mountains 2194 Comment
  RSA158109  Stephanomeria spinosa J. C. Roos, E. C. Jaeger 1955-7-23 6509 Inyo Soldier Flat on E base of Wancoba Mtn. 2195 Comment
  RSA79542  Stephanomeria spinosa J. C. Roos, A. R. Roos 1953-8-11 5991 Inyo 2 miles east of Blue Bell Mine, Inyo Mts. 2866 Comment
  RSA659490  Stillingia spinulosa J. C. Roos 1949-3-26 4120 Riverside Coachella Valley, Indio. Comment
  UCR26191  Stillingia spinulosa John C. Roos 1937-4-28 1286 Riverside Sonoran (Colorado) Desert, Between Rice and Desert Center [on Rice Road, hwy 177] Comment
  CLARK-A1528-5546  Stipa comata John C. Roos 1947-7-12 2833 Inyo Panamint Range 2346 Comment
  UCR24372  Stipa comata John C. Roos 1965-7-18 s.n. San Bernardino San Bernardino Mtns, Moonridge, Bear Valley Comment
  CLARK-A1528-5260  Stipa coronata John C. Roos 1941-7-19 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-5303  Stipa coronata John C. Roos 1949-6-24 3544 San Bernardino Clark Mountain Comment
  UCR25375  Stipa lepida John C. Roos 1939-5-27 s.n. Riverside Reche Canyon Comment
  UCR30542  Stipa lettermanii John C. Roos 1937-7-26 337 San Bernardino San Bernardino Mtns., Pine Knot, Big Bear Valley [vicinity of Pine Knot Blvd., city of Big Bear Lake] 2043 Comment
  CLARK-A1528-5261  Stipa occidentalis John C. Roos, Lucille Roos 1947-7-14 2857 Inyo Panamint Mountains Comment
  CLARK-A1528-5305  Stipa occidentalis John C. Roos 1955-6-21 6462 Inyo Last Chance Mountains 1950 Comment
  CLARK-A1528-1288  Stipa pinetorum John C. Roos, Alfred R. Roos 1953-8-8 5939 Inyo Inyo Mountains 2651 Comment
  UCR24306  Stipa pinetorum John C. Roos 1955-7-21 6480 Inyo Northeastern Mojave Desert, North face of Whitetop [= Last Chance] Peak on the summit of Last Chance Mtns. 2500 Comment
  CLARK-A1528-5268  Stipa pulchra John C. Roos 1952-5-7 5621 Riverside Edgemont 487 Comment
  CLARK-A1528-5553  Stipa speciosa John C. Roos 1937-5-1 1292 Riverside Badlands Comment
  UCR24303  Stipa speciosa John C. Roos 1942-3-7 1003 Los Angeles San Gabriel Mtns., Big Tujunga Canyon 457 Comment
  CLARK-A1528-1291  Stipa thurberiana John C. Roos, Lucille Roos 1951-8-8 5087 Inyo White Mountains 2590 Comment
  CLARK-A1528-2343  Streptanthus bernardinus John C. Roos 1943-7-31 2692 San Bernardino Lake Arrowhead Comment
  RSA71749  Streptanthus cordatus J. C. Roos 1952-7-27 5835 Inyo Southeast rim Reed Flat, White Mountains. 3140 Comment
  UC1234850  Streptanthus cordatus J. C. Roos 1955-6-17 6399 Inyo n slope 2 mi ne Willow Spring; Last Chance Mountains 2011 Comment
Read comments
Nov 4 2011
  UCR30476  Streptanthus cordatus John C. Roos, A. R. Roos 1953-8-11 6007 Inyo Northern Mojave Desert, 3 mi. east of Badger Flat, Inyo Mtns 3049 Comment
  GH422039  Streptanthus cordatus J. C. Roos & L. Roos 1952-7-27 5835 Unknown S.E. rim Reed Flat, Whtie Mts. 3139 Comment
  CLARK-A1528-2113  Stylocline micropoides John C. Roos 1949-4-11 4234 Riverside Chuckwalla Mountains Comment
  RSA659464  Stylomecon heterophylla J. C. Roos 1973-4-14 s.n. San Bernardino Loma Linda hills. Comment
Read comments
May 21 2011
  UCR24447  Styrax officinalis John C. Roos 1966-4-23 s.n. Riverside Peninsular Range; Santa Ana Mtns, south of Corona Comment
  CLARK-A1528-2599  Suaeda californica John C. Roos 1942-9-12 1742 Los Angeles Santa Monica Comment
  UCR19023  Suaeda moquinii John C. Roos 1965-6-30 s.n. Riverside Perris-Aguanga Basin region, Perris Comment
  UCR24214  Suaeda moquinii John C. Roos 1946-9-20 3056 San Bernardino Southern Mojave Desert, alkalai flat near Lucerne Valley Comment
  CLARK-A1528-1133  Suaeda torreyana John C. Roos 1937-7-14 393 San Bernardino San Bernardino 304 Comment
  CLARK-A1528-418  Suaeda torreyana var. ramosissima John C. Roos 1964-8-30 Riverside Coachella Comment
  NY9668  Swallenia alexandrae J. C. Roos 1955-5-13 6352 Inyo This specimen represents an endangered or threatened species. The specific locality has been removed from this record to protect this species from over-collection. These data may be supplied to researchers on request. Comment
  UCR20460  Swallenia alexandrae John C. Roos, L. Roos 1954-6-28 6175 Inyo Northern Mojave Desert, N slope of sand dunes at SE end of Eureka Valley 930 Comment
  SD52950  Swertia albomarginata J. C. Roos 1955-6-19 6437 Inyo 2.5 miles south of Willow Spring; Last Chance Mountains. 2316 Comment
Read comments
Sep 5 2013
  POM261191  Symphoricarpos longiflorus J. C. Roos 1941-8-17 27 Inyo Panamint Mountains; Baldy Peak 3049 Comment
  UC1234867  Symphoricarpos longiflorus J. C. Roos 1955-6-17 6414 Inyo 2 mi ne Willow Spring; Last Chance Mountains 2011 Comment
  CLARK-A1528-2415  Symphoricarpos longiflorus John C. Roos 1947-7-12 2838 Inyo Panamint Mountains 2377 Comment
  CLARK-A1528-5646  Symphoricarpos vaccinioides John C. Roos 1937-5-31 2046 Los Angeles San Gabriel Mountains Comment
  POM18164  Symphyotrichum ascendens A. R. Roos 1922-11-8 s.n. Los Angeles San Gabriel Mountians: Lytle Creek Canyon 915 Comment
  UCR24405  Symphyotrichum lanceolatum var. hesperium John C. Roos 1946-10-2 3104 San Bernardino San Bernardino Valley, near Warm Creek, south of San Bernardino Comment
  UCD136700  Symphyotrichum subulatum var. parviflorum J. C. Roos 1949-10-1 4680 Orange Doheney Beach. 3 Comment
  UCR26238  Tamarix ramosissima John C. Roos 1948-5-15 3846 Riverside Sonoran (Colorado) Desert, Lost Palms Canyon, Eagle Mtns Comment
  UCR24125  Tanacetum camphoratum John C. Roos 1950-7-19 4857 San Francisco San Francisco Bay Region, San Francisco, Santiago St. and 22nd Ave. 61 Comment
  CLARK-A1528-5345  Tanacetum canum John C. Roos 1947-9-19 2797 Inyo Panamint Mountains 3474 Comment
  CLARK-A1528-1457  Tauschia parishii John C. Roos 1937-5-28 San Bernardino San Bernardino Mountains Comment
  RSA658863  Tauschia parishii J. C. Roos 1947-6-27 3725 San Bernardino Ridge west of South Fork [of Santa Ana River], San Bernardino Mtns. Comment
  CLARK-A1528-5748  Taxus brevifolia John C. Roos 1939-7-7 548 Trinity Trinity Mountains Comment
  UCR26202  Tetracoccus hallii John C. Roos, Lucille Roos 1949-4-9 4212 San Bernardino Mojave / Sonoran (Colorado) Desert, east of the road junction [Vidal Junction], 6 mi. north of Vidal 284 Comment
  CAS-BOT-BC328918  Tetradymia argyraea J. C. Roos; A. R. Roos 1950-8-6 4908 San Bernardino 0.1 miles south of Tecopa Pass, Kingston Mtns., Mojave Desert 1524 Comment
  RSA48172  Tetradymia argyraea J. C. Roos, Weatherby 1949-9-2 3572 San Bernardino Summit of Kingston Peak 2232 Comment
  RSA61538  Tetradymia argyraea J. C. Roos 1950-9-2 4965 San Bernardino 1 mi SE of Coliseum Mine, Clark Mountains 1616 Comment
  RSA61541  Tetradymia argyraea J. C. Roos 1950-8-6 4908 San Bernardino Kingston Mountains; 0.1 mile south of Tecopa Pass. 1524 Comment
  RSA85676  Tetradymia argyraea J. C. Roos 1950-8-5 4903 San Bernardino Eastern Mojave Desert Coliseum Mine, Clark Mountain. 1707 Comment
  CLARK-A1528-303  Tetradymia axillaris John C. Roos 1970-5-11 San Bernardino Pinon Hills 1066 Comment
  RSA450749  Tetradymia comosa J. C. Roos 1965-6-27 s.n. San Bernardino Loma Linda Hills. 305 Comment
  RSA48939  Tetradymia glabrata J. C. Roos, Lucille Roos 1949-5-14 4312 San Bernardino Lucerne Valley 884 Comment
  UC1234819  Tetradymia glabrata J. C. Roos 1955-6-21 6469 Inyo 1.5 mi sw Loretto mine (along Loretto road, e slope Inyo Mountains); Inyo MOuntains 1676 Comment
  UCR24129  Tetradymia glabrata John C. Roos 1955-5-16 6387 Inyo Northern Mojave Desert, Inyo Mountains, narrow canyon 1.5 mi SW of Loretto Mine along Loretto Rd. 1677 Comment
  CLARK-A1528-3133  Teucrium depressum John C. Roos 1949-4-8 4201 Imperial Palo Verde Valley Comment
  UCR23431  Thelypodium integrifolium John C. Roos 1946-9-21 3046 San Bernardino N slope San Bernardino Mtns/S Mojave Desert, Box 'S' Springs 1082 Comment
Read comments
Jul 5 2014
  CLARK-A1528-2896  Thermopsis macrophylla John C. Roos 1937-6-15 2383 San Diego Julian Comment
  SEINET814546 Image available Thymophylla pentachaeta J. C. Roos 1948-1 4032 San Bernardino North slope of Clark Mountain, along powerline. Comment
  UCR18796  Tiquilia nuttallii John C. Roos 1937-8-6 1961 Inyo Sierra Nevada Mtns, Big Pine Comment
  RSA79484  Townsendia scapigera J. C. Roos, A. R. Roos 1953-8-13 6010 Inyo Head of Tamarack Canyon, Inyo Mountains. 3140 Comment
  POM262778  Toxicodendron diversilobum A. R. Roos 1936-4-15 707 Los Angeles Claremont. Comment
  CLARK-A1528-1385  Trianthema portulacastrum John C. Roos 1954-11-21 6256 San Bernardino Loma Linda 335 Comment
  UCD97041  Trianthema portulacastrum J. C. Roos 1965-9-5 s.n. Riverside 18 miles west of Blythe. Comment
  UCR19237  Trianthema portulacastrum John C. Roos 1965-10-17 s.n. Riverside Sonoran (Colorado) Desert, roadside 20 miles west of Blythe 120 Comment
  UCR19709  Trianthema portulacastrum John C. Roos 1954-11-21 6256 San Bernardino San Bernardino Valley, Loma Linda 336 Comment
  CLARK-A1528-913  Tribulus terrestris John C. Roos 1951-9-21 5232 San Bernardino Loma Linda 323 Comment
  CLARK-A1528-2129  Trichoptilium incisum John C. Roos 1949-3-5 4089 Riverside Orocopia Mountains Comment
  CLARK-A1528-2130  Trichoptilium incisum John C. Roos 1937-4-24 2456 San Bernardino Sheep Hole Mountains Comment
  CLARK-A1528-2131  Trichoptilium incisum John C. Roos 1966-3-20 Riverside Chuckwalla Mountains Comment
  RSA450472  Trichostema parishii J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek. San Bernardino Mountains. Comment
  CLARK-A1528-5283  Tridens muticus John C. Roos 1947-1-11 3198 Riverside Chuckwalla Mountains Comment
  GH341038  Tridens muticus J. C. Roos 1955-5-13 6339 Unknown west base Last Chance Mts., east of Eureka Valley sand dunes. 1219 Comment
  UCSB51396  Tridens muticus Roos, John 1966-11-12 Riverside Spring Tank, Chuckwalla Mtns. Comment
  CAS-BOT-BC199560  Tridens muticus var. muticus J. C. Roos 1966-11-12 s.n. Riverside Spring Tank, Chuckwalla Mtns. Comment
  CLARK-A1528-2877  Trifolium albopurpureum John C. Roos 1937-5-26 1697 Santa Barbara Cuyama Valley Comment
  GH369311  Trifolium andersonii subsp. monoense J. C. Roos & L. Roos 1951-8-8 5110 Unknown North rim Reed Flat, White Mts. 3169 Comment
  UCSB45553  Trifolium depauperatum var. amplectens Roos, John 1966-3-24 Riverside Flats west of Hemet Comment
  UCR19000  Trifolium gracilentum John C. Roos 1950-4-1 4720 Los Angeles Los Angeles Basin Region, Los Angeles [West Los Angeles/ Westwood], hill just east of [Ralph Waldo] Emerson Junior High School [1650 Selby Ave.] 87 Comment
  RSA92571  Trifolium obtusiflorum J. C. Roos 1952-5-26 5715 Riverside Hass Ranch. Reche Canyon. 457 Comment
  CLARK-A1528-2892  Trifolium variegatum John C. Roos 1937-5-28 1688 San Bernardino San Bernardino Mountains Comment
  UCR25547  Trifolium willdenovii John C. Roos 1941-4-25 159 Riverside Plateau in Reche Canyon Comment
  CLARK-A1528-2882  Trifolium wormskioldii John C. Roos 1950-8-12 4933 San Bernardino San Bernardino Mountains 2194 Comment
  RSA662067  Trifolium wormskioldii J. C. Roos 1965-6-26 s.n. San Bernardino Upper Santa Anita Canyon, Heart Bar area. San Bernardino Mtns. Comment
  UCR18942  Trifolium wormskioldii John C. Roos 1949-5-14 4311 San Bernardino Mojave Desert, Lucerne Valley, Rabbit Springs 884 Comment
  UCSB46884  Triglochin concinna Roos, John 1965-7-11 Inyo Tecopa 426 Comment
  CLARK-A1528-5022  Triglochin maritima John C. Roos 1937-6-13 1449 San Diego Imperial Beach Comment
  RSA44254  Triglochin maritima J. C. Roos, R. Weatherby 1949-9-3 3566 Inyo Tecopa. 427 Comment
  CLARK-A1528-2375  Triodanis biflora John C. Roos 1937-5-2 1416 Riverside La Sierra Comment
  UCR17558  Triodanis biflora John C. Roos, L. Roos 1952-5-30 5732 Riverside One year old burn on hills of North Moreno between Moreno and Redlands. In branch of San Timoteo Canyon. 503 Comment
  UCR23685  Triodanis biflora John C. Roos 1942-5-23 1068 Los Angeles San Gabriel Mtns., Santa Anita Canyon Comment
  UCR18634  Triteleia laxa John C. Roos 1950-7-22 4866 Sonoma Jenner 30 Comment
  CLARK-A1528-2356  Tropidocarpum gracile John C. Roos 1937-3-25 1335 Los Angeles Comment
  UCR23389  Vancouveria planipetala John C. Roos 1958-6-20 s.n. Mariposa Sierra Nevada Mtns., Mariposa Grove near Yosemite Park [location may be in error] Comment
Read comments
Jul 27 2007
  CLARK-A1528-4324  Verbascum thapsus John C. Roos 1968-9-28 San Bernardino San Bernardino Mountains 1981 Comment
  POM301528  Verbascum thapsus J. C. Roos 1937-7-25 2359 San Bernardino Seven Oaks, San Bernardino Mountains. Comment
  UCR24465  Verbena bracteata John C. Roos 1949-6-20 4413 San Bernardino Eastern Mojave Desert, Mountain Pass, Clark Mountain Comment
  CLARK-A1528-4403  Verbena lasiostachys John C. Roos 1937-3-25 1332 Los Angeles Comment
  CLARK-A1528-7880  Verbena lasiostachys John C. Roos 1965-9-11 San Bernardino San Bernardino Mountains Comment
  CLARK-A1528-4405  Verbena menthifolia John C. Roos 1937-6-13 1440 San Diego San Ysidro Comment
  CLARK-A1528-4330  Veronica arvensis John C. Roos 1950-5-28 4820 San Bernardino Loma Linda 323 Comment
  UCR19550  Veronica arvensis John C. Roos 1950-5-28 4820 San Bernardino San Bernardino Valley, Loma Linda; Loma Linda University Campus 323 Comment
  CLARK-A1528-4331  Veronica peregrina John C. Roos 1966-3-24 Riverside Edgemont Comment
  CLARK-A1528-4338  Veronica persica John C. Roos 1947-2-8 3231 San Bernardino San Bernardino County Hospital Comment
  POM262950  Veronica persica J. C. Roos 1941-2-15 228 San Bernardino Loma Linda. Comment
  CLARK-A1528-2138  Viguiera deltoidea var. parishii John C. Roos 1946-11-30 3167 Riverside Chuckwalla Mountains Comment
  CLARK-A1528-2180  Viguiera deltoidea var. parishii John C. Roos 1949-6-26 4496 San Bernardino Clark Mountain 1462 Comment
  CLARK-A1528-2143  Viguiera multiflora var. nevadensis John C. Roos 1941-8-17 72 Inyo Panamint Mountains Comment
  CLARK-A1528-2145  Viguiera reticulata John C. Roos 1947-4-20 3508 Inyo Death Valley 701 Comment
  CLARK-A1528-4979  Viguiera reticulata John C. Roos 1947-1-26 3203 Inyo Death Valley Comment
Read comments
Oct 28 2014
  UCR27517  Viola adunca John C. Roos 1937-6-5 931 San Bernardino San Bernardino Mtns., Crestline Comment
  POM263155  Viola lobata J. C. Roos 1937-6-15 524 San Diego Julian. Comment
  CLARK-A1528-4413  Viola purpurea John C. Roos 1937-5-15 1189 San Bernardino San Bernardino Mountains Comment
  UCR24452  Viola purpurea John C. Roos 1966-5-7 s.n. San Bernardino San Bernardino Mtns., Barton Flats 1829 Comment
  POM263065  Viola purpurea subsp. mohavensis J. C. Roos 1937-5-31 522 Los Angeles Big Pines. Comment
  CLARK-A1528-4424  Vitis girdiana John C. Roos 1937-5-19 2063 Riverside Norco Comment
  RSA78329  Vulpia microstachys var. ciliata J. C. Roos, L. Roos 1951-6-9 5060 San Bernardino San Bernardino Mountains. Comment
  POM263251  Vulpia microstachys var. confusa J. C. Roos 1939-4-18 251 Napa 3.5 miles north of Pacific Union College, Angwin. Comment
  POM265761  Vulpia microstachys var. microstachys J. C. Roos 1937-5-10 2071 Riverside Lake Elsinore. Comment
  RSA662416  Wyethia ovata J. C. Roos 1965-7-22 s.n. Riverside Thomas Valley, San Jacinto Mtns. Comment
  RSA71786  X Stiporyzopsis bloomeri J. C. Roos, L. Roos 1951-8-8 5092 Inyo 3 miles NW of Cedar Flat, White Mountains 2591 Comment
  RSA0029557  Xanthisma gracile J. C. Roos 1949-6-23 4466 San Bernardino Lanfair Valley, NW of Hackberry Mtn. 1311 Comment
  RSA85135  Xylococcus bicolor J. C. Roos, L. Roos 1954-2-13 6044 San Diego Merriam Mts. about 5 miles north of Escondido. 289 Comment
  UCR30451  Yucca brevifolia John C. Roos 1966-4-3 s.n. San Bernardino Mojave Desert, 6 mi south of Victorville Comment
  RSA450203  Yucca whipplei var. whipplei J. C. Roos 1965-6-6 s.n. San Bernardino Mill Creek near Fallsvale [Forest Falls], San Bernardino Mountains. Comment
  POM264158  Zannichellia palustris J. C. Roos 1937-5-10 508 Riverside Lake Elsinore. Comment
  CLARK-A1528-3308  Zauschneria californica John C. Roos 1949-9-21 4663 Riverside Reche Canyon Comment
  CLARK-A1528-3205  Zigadenus fremontii John C. Roos 1952-4-27 5582 San Bernardino Scotts Canyon 426 Comment
  CLARK-A1528-5093  Zigadenus fremontii John C. Roos 1957-3-16 6607 Ventura Newbury Park Comment
  SEINET13946396 Image available Ziziphus obtusifolia J. C. Roos 1965-1 s.n. Riverside Lost Palms Canyon, Eagle Mountains, Colorado Desert. Comment



  Copyright © 2019 Regents of the University of California — Updated 11 January 2019
0.13 processing seconds