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Specimen ID
Determination *
Collector
Collection Date
Collection Number
County
Locality
Elevation in meters
Feedback
CLARK-A1528-2720
Acacia greggii
John C. Roos
1950-8-4
San Bernardino
Clark Mountain Range
Comment
CLARK-A1528-2722
Acacia melanoxylon
John C. Roos
1943-8-5
Los Angeles
Pomona
Comment
CLARK-A1528-2686
Acalypha californica
John C. Roos
1937-8-30
2565
San Diego
Jamul
Comment
GH386624
Acamptopappus shockleyi
J. C. Roos
1955-5-13
6345
Unknown
west base Last Chance Mts. east of Eureka Valley sand dunes
1280
Comment
RSA40571
Acamptopappus shockleyi
J. C. Roos
1947-4-20
3519
Inyo
Panamint Mountains, Emigrant Pass.
1280
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
RSA658865
Acer negundo
J. C. Roos
1946-8-31
2935
San Bernardino
Oak Glen School, San Bernardino Mtns.
Comment
UCR25767
Acer negundo
John C. Roos
1949-4-2
4134
Riverside
upper San Timoteo Canyon
Comment
CLARK-A1528-5495
Achillea millefolium
John C. Roos
1965-6-12
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2275
Achlys triphylla
John C. Roos
1957-7-2
6646
Sonoma
Millers Ridge
Comment
RSA104834
Achnatherum aridum
J. C. Roos
1955-5-13
6346
Inyo
West base Last Chance Mountains, east of Eureka Valley sand dunes
1220
Comment
SEINET4692067
Achnatherum coronatum
J. C. Roos
1950-1
4817
Riverside
Hills NE of summit of Reche Canyon
762
Comment
CAS-BOT-BC216429
Achnatherum lettermanii
J. C. Roos
1965-7-17
s.n.
San Bernardino
Stetson Creek, Barton Flats, San Bernardino Mountains
Comment
RSA40596
Achnatherum nevadense
J. C. Roos
1947-7-14
2857
Inyo
N slope Bady Peak, Panamint Mts
2591
Comment
UCSB37783
Achnatherum occidentale subsp. californicum
Roos, John
1981-09
San Bernardino
Barton Flats, San Bernardino Mtns.
Comment
UCSB45574
Achnatherum occidentale subsp. californicum
Roos, John
1967-10-7
Inyo
Big Pine Creek below Palisade Glacier.
2895
Comment
CAS-BOT-BC210896
Achnatherum parishii subsp. depauperatum
John Roos; Lucille Roos
1947-7-13
2888
Inyo
East slope Baldy Pk., Panamint Mts.
2529
Comment
CAS-BOT-BC218077
Achnatherum pinetorum
J. C. Roos; A. R. Roos
1954-6-12
6132
Inyo
Ridge between Wild Rose and Trail Canyons, 1 mile ESE of Wild Rose Peak, Panamint Mountains
2499
Comment
CAS-BOT-BC218078
Achnatherum pinetorum
J. C. Roos; A. R. Roos
1954-6-12
6136
Inyo
N face Wild Rose Peak, Panamint Mountains
2682
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
UC1023382
Achnatherum pinetorum
John and Lucille Roos
1951-8-10
5130
Mono
1 1/2 mi n Piute Mtn.; White Mts.
3566
Comment
UC1023407
Achnatherum pinetorum
J. C. and A. R. Roos
1953-8-8
5939
Inyo
Badger Flat Inyo Mts., Badger Flat
2651
Comment
CAS-BOT-BC218000
Achnatherum webberi
John Roos; Lucille Roos
1952-7-25
5819
Inyo
Between Westgard Pass and Reed Flat, White Mountains
2438
Comment
CLARK-A1528-3973
Adenostoma sparsifolium
John C. Roos
1946-8-27
2787
Riverside
Santa Rosa Mountains
1920
Comment
CLARK-A1528-4007
Adenostoma sparsifolium
John C. Roos
1937-8-17
2405
Riverside
San Jacinto Mountains
1066
Comment
UCR23515
Adenostoma sparsifolium
John C. Roos
1936-9-15
2514
Riverside
San Jacinto Mtns., Near the summit of the Pines to Palms Hwy
1494
Comment
UCR18785
Adiantum capillus-veneris
John C. Roos
1948-5-15
3850
Riverside
Sonoran (Colorado) Desert, Eagle Mountains, upper Lost Palms Canyon
1037
Comment
RSA92775
Adiantum capillus-veneris
J. C. Roos, Lucille Roos
1954-11-25
6263
Inyo
mouth of Beveridge Canyon at est base of Inyo Mountains, Saline Valley
609
Comment
CLARK-A1528-3539
Adiantum jordanii
John C. Roos
1952-2-29
5363
Riverside
Reche Canyon
457
Comment
CLARK-A1528-3135
Agastache urticifolia
John C. Roos
1946-8-31
2990
San Bernardino
Oak Glen
Comment
RSA79491
Agoseris parviflora
J. C. Roos
1953-8-11
6003
Inyo
In pass 3 miles east of Blue Bell Mine on trail to Side Hill Spring.
3108
Comment
CLARK-A1528-5213
Agropyron elongatum
John C. Roos
1967-11-25
San Bernardino
San Bernardino Mountains
426
Comment
UCR25465
Agrostis capillaris
John C. Roos
1950-7-20
4865
San Francisco
San Francisco Bay Region, San Francisco City College
91
Comment
RSA78217
Agrostis exarata
J. C. Roos
1951-7-30
5076
Los Angeles
North slope Mt. Baden Powell, San Gabriel Mountains.
2043
Comment
CLARK-A1528-4446
Agrostis idahoensis
John C. Roos
1946-9-4
2943
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-7824
Agrostis scabra
John C. Roos
1937-8-18
494
Riverside
San Jacinto Mountains
Comment
RSA664943
Agrostis scabra
J. C. Roos
1937-7-25
410
San Bernardino
Clarks Grade. (S. of Big Bear Lake) San Bernardino Mountains.
Comment
UCR23918
Agrostis scabra
John C. Roos
1940-8-3
1555
San Bernardino
San Bernardino Mtns., Bluff Lake
2317
Comment
UCR25466
Agrostis stolonifera
John C. Roos
1950-9-16
4988
Los Angeles
Los Angeles, Santa Monica Blvd. at Midvale Ave.
61
Comment
RSA457393
Agrostis stolonifera
A. R. Roos
1937-8-19
10693
Riverside
Idyllwild, San Jacinto Mountains.
Comment
UCR24051
Agrostis viridis
John C. Roos
1950-7-5
4849
San Bernardino
San Bernardino Valley, Loma Linda, residence at 414 Steward Street
335
Comment
UCR26197
Ailanthus altissima
John C. Roos
1937-6-8
937
San Diego
Peninsular Range, Warner Hot Springs
Comment
UCR25304
Aira praecox
John C. Roos
1957-7-2
6637
Mendocino
Point Arena Lighthouse, on the coast
15
Comment
RSA450097
Alchemilla occidentalis
J. C. Roos
1950-4-22
4751
Riverside
On the hills N.E. 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
UC1234857
Allium atrorubens var. cristatum
J. C. Roos
1955-6-19
6439
Inyo
3 mi s Willow Spring; Last Chance Mountains
2286
Comment
POM263555
Allium fimbriatum var. fimbriatum
J. C. Roos
1941-5-10
129
Riverside
Pinyon Flats Camp, Santa Rosa Mountains.
1220
Comment
POM264307
Allium haematochiton
J. C. Roos
1937-3-10
634
Riverside
Norco hills.
Comment
CLARK-A1528-7758
Allium monticola
John C. Roos
1937-7-16
636
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-7759
Allium monticola
John C. Roos
1937-7-16
636
Los Angeles
San Gabriel Mountains
Comment
RSA648735
Allium peninsulare
J. C. Roos
1948-5-22
3865
San Bernardino
In a canyon S.E. of the summit of Reche Canyon.
Comment
CLARK-A1528-1514
Allium praecox
John C. Roos
1950-3-27
4718
San Bernardino
Slover Mountain
350
Comment
CLARK-A1528-1515
Allium validum
John C. Roos
1965-8-9
Inyo
Independence Creek
Comment
CLARK-A1528-5243
Alnus rhombifolia var. bernardina
John C. Roos
1936-8-15
570
San Bernardino
San Bernardino Mountains
1981
Comment
CLARK-A1528-7784
Amaranthus albus
John C. Roos
1965-7-27
Riverside
Hemet
Comment
POM262995
Amaranthus blitoides
J. C. Roos
1940-9-14
232
San Bernardino
Orchard south of Bryn Mawr.
Comment
UCR23428
Amaranthus blitoides
John C. Roos
1946-9-21
3073
San Bernardino
Mojave Desert, Rabbit Springs, Lucerne Valley
887
Comment
POM265637
Amaranthus californicus
J. C. Roos
1937-8-19
2020
Riverside
Hemet Valley, just above Hemet Lake, San Jacinto Mountains.
Comment
CLARK-A1528-1394
Amaranthus deflexus
John C. Roos
1954-10-19
6255
San Diego
Escondido
198
Comment
CLARK-A1528-1395
Amaranthus fimbriatus
John C. Roos
1963-10-23
Riverside
Chuckwalla Mountains
Comment
RSA69868
Amaranthus fimbriatus
J. C. Roos
1951-9-19
5222
San Bernardino
In irrigated orhard with Amaranthus Palmeri, Tribulus terrestris, Loma Linda
Comment
RSA0036246
Amaranthus hybridus
A. R. Roos
1937-12-2
s.n.
Orange
Santa Ana.
Comment
CLARK-A1528-112
Amaranthus palmeri
John C. Roos
1951-9-19
5223
San Bernardino
Loma Linda
Comment
UCR23419
Amaranthus palmeri
John C. Roos
1940-6-24
1895
San Bernardino
San Bernardino Valley, Loma Linda
305
Comment
UCR25292
Amaranthus palmeri
Alfred R. Roos
1937-12-9
s.n.
Orange
West 17th St. in Santa Ana
Comment
CLARK-A1528-1403
Amaranthus palmeri
Alfred R. Roos
1936-9-25
San Bernardino
Comment
CLARK-A1528-5482
Amaranthus retroflexus
Alfred R. Roos
1937-11-24
San Bernardino
Bryn Mawr
Comment
RSA662074
Amaranthus retroflexus
A. R. Roos
1937-11-24
s.n.
San Bernardino
Bryn Mawr.
Comment
GH404015
Amaranthus torreyi
J. C. Roos & A. R. Roos
1950-8-5
4905
Unknown
Coliseum Mine, Clark Mts., eastern Mohave Desert
1706
Comment
UC1010300
Amaranthus torreyi
John C. Roos
1950-9-1
4958
San Bernardino
vicinity Coliseum Mine (e Mohave Desert); Mohave Desert, Clark Mts.
1615
Comment
UCD128668
Amauriopsis dissecta
J. C. Roos
1946-8-24
2923
Riverside
Santa Rosa Mountains.
2286
Comment
POM262996
Ambrosia acanthicarpa
J. C. Roos
1940-9-28
233
San Bernardino
Loma Linda.
Comment
CLARK-A1528-1534
Ambrosia chenopodiifolia
John C. Roos
1937-6-13
1441
San Diego
San Ysidro
Comment
CLARK-A1528-1103
Ambrosia confertiflora
John C. Roos
1943-4-10
2613
San Bernardino
Loma Linda
365
Comment
CLARK-A1528-5358
Ambrosia confertiflora
John C. Roos
1949-10-12
4691
San Bernardino
Loma Linda
Comment
RSA648062
Ambrosia confertiflora
J. C. Roos
1943-4-10
2613
San Bernardino
Loma Linda.
Comment
UCR24357
Ambrosia confertiflora
John C. Roos
1942-10-10
1722
Los Angeles
Westwood Village, Malcolm Ave. and Santa Monica Blvd.
98
Comment
CLARK-A1528-1535
Ambrosia dumosa
John C. Roos
1937-4-18
1349
Riverside
Snow Creek
Comment
UCR18583
Ambrosia ilicifolia
John C. Roos, Lucille Roos
1949-4-10
4230
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mts, canyon 3.5 mi. SE of Desert Center
612
Comment
UCSB45945
Ambrosia psilostachya
Roos, Alfred
1937-11-15
San Bernardino
Loma Linda
Comment
CLARK-A1528-1544
Ambrosia trifida
John C. Roos
1937-9-7
Los Angeles
North Hollywood
Comment
UCR27935
Amelanchier covillei
John C. Roos
1948-7-4
3914
Inyo
Panamint Mtns., Thorndike's Spring
2165
Comment
RSA47540
Amelanchier utahensis subsp. covillei
J. C. Roos
1949-5-28
4349
San Bernardino
North slope of Clark Mountains
1890
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
UCR24368
Amphipappus fremontii
John C. Roos
1955-5-13
6336
Inyo
Northern Mojave Desert, west base of Last Chance Mountains, east of Eureka Valley sand dunes
1280
Comment
CLARK-A1528-1545
Amphipappus fremontii
John C. Roos
1955-4-6
6291
Inyo
Inyo Mountains
518
Comment
CLARK-A1528-4456
Andropogon glomeratus
John C. Roos
1938-12-29
322
Riverside
Palm Canyon
Comment
POM263194
Andropogon glomeratus
J. C. Roos
1938-12-29
322
Riverside
Palm Canyon.
Comment Read comments Apr 3 2011
UCR30562
Anisocoma acaulis
John C. Roos
1949-5-28
4339
San Bernardino
Eastern Mojave Desert, wash near Green's Mine, north side Clark Mountain
1646
Comment
CLARK-A1528-5127
Antennaria rosea
John C. Roos
1939-6-3
6/ 3 /39
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1554
Anthemis cotula
John C. Roos
1965-6-29
San Bernardino
Bryn Mawr
304
Comment
CLARK-A1528-1555
Anthemis cotula
John C. Roos
1941-6-14
San Diego
Lemon Grove
Comment
POM266318
Anthemis cotula
J. C. Roos
1937-5-23
23434
Riverside
La Sierra.
Comment
RSA301700
Anthoxanthum odoratum
A. R. Roos
1938-6-20
1524
Sonoma
field between Santa Rosa and Sonoma
Comment
RSA0034830
Antirrhinum coulterianum
J. C. Roos
1941-5-17
138
Riverside
About 4 miles S.W. of March Field.
Comment
CLARK-A1528-4163
Antirrhinum kelloggii
John C. Roos
1956-4-8
6574
Ventura
Potrero Valley
Comment
UCR24488
Antirrhinum nuttallianum subsp. subsessile
John C. Roos
1956-4-8
6575
Ventura
Potrero Valley. N slope of 'Bony Mtn.'
840
Comment
CLARK-A1528-1419
Apiastrum angustifolium
John C. Roos
1969-5-17
San Bernardino
Loma Linda Hills brushy north slope; in semi-shade, ; ; San Bernardino South. 7.5'Q
365
Comment Read comments Oct 26 2015
UCR23397
Apiastrum angustifolium
John C. Roos
1943-4-28
2629
Riverside
hills SE of Riverside
Comment
UCSB49864
Apiastrum angustifolium
Roos, John
1969-5-17
San Bernardino
Loma Linda Hills
365
Comment
CLARK-A1528-1426
Apium leptophyllum
John C. Roos
1937-4-21
Los Angeles
Claremont
Comment
CLARK-A1528-1474
Apocynum androsaemifolium
John C. Roos
1937-7-27
2355
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1475
Apocynum cannabinum
John C. Roos
1958-6-20
Mariposa
Yosemite National Park
Comment
UCR26266
Apocynum cannabinum
John C. Roos
1965-7-11
s.n.
Inyo
Northern Mojave Desert, Emigrant Spring, Death Valley
1250
Comment
RSA47337
Aquilegia shockleyi
J. C. Roos, L. Roos
1949-6-24
4488
San Bernardino
north side of Clark Mts.
2287
Comment
UCR23248
Arabis glaucovalvula
John C. Roos
1947-4-20
3515
Inyo
Northern Mojave Desert, Panamint Mtns: Emigrant Pass
1555
Comment
CLARK-A1528-2284
Arabis inyoensis
John C. Roos
1937-8-8
2191
Inyo
Lone Pine Canyon
2743
Comment
CLARK-A1528-2285
Arabis lemmonii
John C. Roos
1951-8-10
5144
Mono
White Mountains
4145
Comment
RSA0129930
Arabis lemmonii
J. C. Roos
1937-8-8
2191
Inyo
Lone Pine Canyon.
2744
Comment
UCR18766
Arabis perennans
John C. Roos
1948-7-2
3907
Inyo
Northern Mojave Desert, Panamint Mouontains, Mahogany Flats
2409
Comment
CLARK-A1528-2423
Arabis platysperma
John C. Roos
1936-7-30
948
San Bernardino
San Bernardino Mountains
3291
Comment
CLARK-A1528-2290
Arabis pulchra
John C. Roos
1947-6-27
3717
San Bernardino
San Bernardino Mountains
2133
Comment Read comments Oct 22 2014
CLARK-A1528-2291
Arabis pulchra
John C. Roos
1962-3-24
Riverside
Whitewater
Comment
CLARK-A1528-2292
Arabis pulchra
John C. Roos
1952-7-27
5830
Inyo
White Mountains
3169
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
UCR30570
Arabis sparsiflora var. arcuata
John C. Roos
1937-6-5
2210
San Bernardino
San Bernardino Mtns., Crestline
Comment
CLARK-A1528-1484
Aralia californica
John C. Roos
1937-7-15
383
San Bernardino
San Gabriel Mountains
Comment
POM301544
Arbutus menziesii
J. C. Roos
1942-3-21
1095
Los Angeles
Chantry Flats, Santa Anita Canyon
Comment
CLARK-A1528-4416
Arceuthobium abietinum
John C. Roos
1965-8-21
Tulare
Sequoia
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
POM263487
Arctostaphylos stanfordiana subsp. stanfordiana
J. C. Roos
1939-1-21
300
Napa
Angwin.
366
Comment
CLARK-A1528-2438
Arenaria aculeata
John C. Roos
1937-8-5
642
Inyo
White Mountains
2743
Comment Read comments Jun 4 2015
POM274234
Arenaria congesta var. subcongesta
J. C. Roos
1947-7-11
2844
Inyo
Mahogany Flats, Panamint mtns.
2500
Comment
RSA0124238
Arenaria kingii subsp. compacta
J. C. Roos
1951-8-10
5161
Mono
1 mile N of Sheep Mtn, White Mts.
3598
Comment
UCR18964
Arenaria macradenia var. macradenia
John C. Roos
1965-7-22
s.n.
Riverside
San Jacinto Mtns, Thomas Valley
Comment
CLARK-A1528-2448
Arenaria macradenia var. parishiorum
John C. Roos
1937-4-25
2104
San Bernardino
Providence Mountains
Comment
CLARK-A1528-4859
Arenaria macradenia var. parishiorum
John C. Roos
1949-5-28
4336
San Bernardino
Clark Mountain
1615
Comment
CLARK-A1528-2632
Arenaria nuttallii subsp. gracilis
John C. Roos
1946-9-4
2969
San Bernardino
San Bernardino Mountains
3201-3292
Comment
UCR25928
Arenaria nuttallii subsp. gracilis
John C. Roos
1949-7-4
25928
San Bernardino
San Bernardino Mtns., S side of San Gorgonio Peak
3171
Comment
UCR19211
Argemone munita
John C. Roos
1949-4-7
4162
Imperial
Sonoran (Colorado) Desert, 3 mi. north of Niland
Comment
RSA92431
Argyrochosma jonesii
J. C. Roos, Lucille Roos
1954-5-8
6103
Inyo
Titus Canyon, Grapevine Mountains
1280
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
CLARK-A1528-4463
Aristida adscensionis
John C. Roos
1952-4-9
5508
Riverside
Mount Rubidoux
365
Comment
RSA457402
Aristida adscensionis
J. C. Roos
1937-6-26
s.n.
San Bernardino
Redlands.
Comment
UCR19683
Aristida californica
John C. Roos
1946-9-14
3007
Riverside
Santa Rosa Mtns, Dos Palmas Spring, east of Asbestos Mountain
1070
Comment
POM266630
Aristida oligantha
J. C. Roos
1939-7-3
1517
Yuba
plains near Marysville
Comment
CLARK-A1528-4482
Aristida purpurea
John C. Roos
1965-8-15
Riverside
San Jacinto Valley
Comment
RSA659618
Aristida purpurea
J. C. Roos
1965-8-15
s.n.
Riverside
Gilman Hot Springs, San Jacinto Valley.
Comment
SEINET244838
Aristida purpurea
J. C. Roos
1949-4-8
4198
Riverside
Imperial Co., Calif.
Comment
UCSB51394
Aristida purpurea
Roos, John
1965-6-23
Riverside
Lost Palms Canyon, Eagle Mtns
Comment
SEINET14198778
Aristida purpurea
J. Roos, L. Roos
1954-5-8
6106
Inyo
Titus Canyon below Dlare Spring, Grapevine Mtns.
Comment
UCR23878
Aristida purpurea var. fendleriana
John C. Roos
1949-6-22
4443
San Bernardino
Eastern Mojave Desert, New York Mtns, Barnwell
1494
Comment
POM264354
Aristida purpurea var. nealleyi
J. C. Roos
1938-8-7
582
Riverside
East of Hemet, in mountains along San Jacinto River.
Comment Read comments Apr 3 2011
UCR19678
Aristida purpurea var. nealleyi
John C. Roos, Lucille Roos
1949-4-11
4242
Riverside
Sonoran (Colorado) Desert, Hayfield Dry Lake
Comment
RSA85678
Aristida purpurea var. purpurea
J. C. Roos
1950-8-5
4906
San Bernardino
North slopes Clark Mountains along power line road, eastern Mojave Desert.
1280
Comment
RSA0034601
Aristida purpurea var. purpurea
J. C. Roos
1965-8-15
s.n.
Riverside
Gilman Hot Springs, San Jacinto Valley.
Comment
CAS-BOT-BC89986
Arnica mollis
John Roos; Lucille Roos
1951-8-11
5171
Mono
Campito Meadow, White Mts.
3322
Comment
RSA71399
Arnica parryi subsp. sonnei
J. C. Roos, L. Roos
1951-8-11
5171
Mono
Campito Meadow, White Mts.
3323
Comment
CLARK-A1528-1059
Artemisia ludoviciana
John C. Roos
1937-7-27
1970
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1579
Artemisia ludoviciana
John C. Roos
1937-3-1
2480
San Bernardino
Victorville
Comment
CAS-BOT-BC93726
Artemisia ludoviciana subsp. albula
John Roos; Lucille Roos
1947-9-20
2814
Inyo
Emigrant Wash near Emigrant Spring, Panamint Mts.
1249
Comment
UC1506369
Artemisia ludoviciana subsp. incompta
J. C. Roos
1948-9-7
4000
Mono
Tioga Pass
2682
Comment Read comments Sep 29 2010
POM266369
Artemisia ludoviciana subsp. ludoviciana
J. C. Roos
1937-8-4
2444
Inyo
along a stream-bed, Independence
Comment
RSA450740
Artemisia ludoviciana subsp. ludoviciana
J. C. Roos
1961-9-2
1981
Inyo
Canyon below Side Hill Spring, Inyo Mountains
2805
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-BC90805
Artemisia michauxiana
John Roos; Lucille Roos
1951-8-10
5143
Mono
east slope White Mtn. Peak, White Mts.
4145
Comment
RSA71689
Artemisia michauxiana
J. C. Roos, L. Roos
1951-8-10
5143
Mono
East slope White Mtn. Peak, White Mts.
4146
Comment
CAS-BOT-BC90844
Artemisia nova
John C. Roos
1946-8-29
2768
San Bernardino
Eagle Point, Bear Valley, San Bernardino Mts.
2042
Comment
CLARK-A1528-7841
Artemisia nova
John C. Roos
1948-9-18
4069
San Bernardino
Mojave Desert
1584
Comment
RSA45486
Artemisia nova
J. C. Roos, Lucille Roos
1948-9-18
4030
San Bernardino
North side of Clark Mountains, dry wash below Colisseum Mine
1524
Comment
CLARK-A1528-1587
Artemisia nova
John C. Roos
1947-9-19
2796
Inyo
Panamint Mountains
3352
Comment
POM274192
Artemisia rothrockii
J. C. Roos
1946-8-29
2777
San Bernardino
East end of Bear Valley
2073
Comment
UCR24398
Artemisia rothrockii
John C. Roos
1940-8-3
1561
San Bernardino
San Bernardino Mtns., east end of Bear Valley
2073
Comment
POM266368
Artemisia rothrockii
J. C. Roos
1940-8-3
1561
San Bernardino
E end of Bear Valley
Comment
POM274206
Artemisia tridentata
J. C. Roos
1947-9-19
2795
Inyo
Panamint Mountain range, Telescope Peak, exposed ridge
3201
Comment
POM274211
Artemisia tridentata
J. C. Roos
1946-8-29
2768
San Bernardino
Eagle Point, Bear Valley
2043
Comment
POM274216
Artemisia tridentata
J. C. Roos
1947-9-20
2807
Inyo
Panamint Mountain Range, Wildrose Canyon
2378
Comment
RSA44921
Asclepias fascicularis
J. C. Roos
1949-6-21
3699
San Bernardino
roadside, Cushenbury Canyon, north base of San Bernardino Mtns.
1677
Comment
UCSB46872
Asparagus officinalis
J. C. Roos
1965-9-19
San Bernardino
collected along Loma Linda 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
RSA47462
Aster ascendens
J. C. Roos
1949-7-16
4562
San Bernardino
Moonridge Ski Area, Bear Valley.
2226
Comment
RSA69827
Aster bernardinus
J. C. Roos
1951-10-19
5323
Riverside
San Timoteo Canyon, El Casco.
610
Comment
RSA155741
Aster bracteolatus
J. C. Roos
1955-8-28
6570
Inyo
On the West side of Owens Lake, 3 miles North of Olancha
1091
Comment
CLARK-A1528-1604
Aster carnosus
John C. Roos
1956-8-2
6591
San Bernardino
San Bernardino Valley
Comment
RSA662534
Aster carnosus
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-A1528-1605
Aster chilensis
John C. Roos
1946-9-14
3014
Riverside
San Jacinto Mountains
1371
Comment
POM274194
Aster frondosus
J. C. Roos
1946-8-29
2780
San Bernardino
Eagle Point, Bear Valley.
2043
Comment
SD52915
Aster frondosus
J. C. Roos, A. R. Roos
1955-8-28
6564
Inyo
West side Owens Lake, 3 miles north of Olancha.
1079
Comment
CLARK-A1528-1610
Aster hesperius
John C. Roos
1951-9-25
5258
Riverside
Fairmont Park
259
Comment
CLARK-A1528-1611
Aster intricatus
John C. Roos
1946-9-21
3064
San Bernardino
Mojave Desert
Comment
UCR18857
Aster pauciflorus
John C. Roos
1965-7-11
s.n.
Inyo
Northern Mojave Desert, Tecopa
427
Comment
UCR18986
Astragalus aridus
John C. Roos
1949-3-19
4116
Riverside
Sonoran (Colorado) Desert, sand dunes west of Indio
Comment
POM302495
Astragalus asymmetricus
J. C. Roos
1940-6-8
1909
Fresno
About 25 miles west of Fresno.
Comment
UCSB42211
Astragalus atratus
Roos, John; Munz, Philip
1955-4-8
Inyo
Last Chance Mtns., east of the Eureka Valley sand dunes
1219
Comment
UCR23959
Astragalus bicristatus
John C. Roos
1937-7-28
1947
San Bernardino
San Bernardino Mtns, Van Deusen Canyon [Caribou Creek], near Bear Valley
2195
Comment
RSA71716
Astragalus calycosus
J. C. Roos, L. Roos
1952-7-26
5822
Inyo
East side Reed Flat at head of Birch Creek, White Mtns.
3049
Comment
RSA79694
Astragalus calycosus
J. C. Roos, A. R. Roos
1953-8-9
5958
Inyo
Near head of Tamarack Canyon
3049
Comment
UC1236233
Astragalus casei
John C. Roos
1955-5-15
6373
Inyo
0.5 mi w Willow Spring (Last Chance Mts.); , w of Willow Spring
1767
Comment
UCR23960
Astragalus coccineus
John C. Roos
1942-5-1
1115
San Bernardino
Mojave Desert, Little San Bernardino Mtns., Quail Springs
1159
Comment
CLARK-A1528-2734
Astragalus crotalariae
John C. Roos
1949-4-6
4156
Imperial
Salton Sea
Comment
UCR25919
Astragalus crotalariae
John C. Roos, Lucille Roos
1949-4-6
4156
Imperial
Sonoran (Colorado) Desert, saline flats near Frink
-55
Comment
CLARK-A1528-2735
Astragalus didymocarpus
John C. Roos
1938-4-28
1618
Riverside
La Sierra
Comment
CLARK-A1528-1157
Astragalus douglasii
John C. Roos
1937-6-14
1465
San Diego
Descanso
1036
Comment
POM274197
Astragalus douglasii var. parishii
J. C. Roos
1946-9-27
2788
Riverside
Santa Rosa Mtns.
2226
Comment
CAS-BOT-BC186870
Astragalus gilmanii
John Roos; Lucille Roos
1947-7-13
2887
Inyo
Arcane Meadows, Panamint Mts.
3048
Comment
RSA40580
Astragalus gilmanii
J. C. Roos
1947-7-13
2887
Inyo
Arcane Meadows, Panamint Mountains.
3049
Comment
UCR18975
Astragalus gilmanii
John C. Roos
1948-7-4
3898
Inyo
Northern Mojave Desert, Panamint Mountains, Mahogany Flats
2470
Comment
CLARK-A1528-2744
Astragalus gilmanii
John C. Roos
1948-7-4
3898
Inyo
Panamint Mountains
2468
Comment
CLARK-A1528-2745
Astragalus insularis var. harwoodii
John C. Roos
1949-4-10
4222
Riverside
Chuckwalla Mountains
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
UCR18994
Astragalus insularis var. harwoodii
John C. Roos, Lucille Roos
1949-4-11
4241
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mountains, Corn Spring
Comment
RSA157085
Astragalus inyoensis
J. C. Roos
1955-6-19
6433
Inyo
One mile south of Willow Springs, Last Chance Mountains
2195
Comment
UCR18974
Astragalus kentrophyta
John C. Roos
1967-8-5
s.n.
Inyo
White Mtns, Crest of range, east of Badger Flat
Comment
CLARK-A1528-5094
Astragalus kentrophyta subsp. implexus
John C. Roos
1952-7-26
5820
Inyo
White Mountains
3047
Comment
CLARK-A1528-5095
Astragalus kentrophyta subsp. implexus
John C. Roos
1951-8-9
5124
Inyo
White Mountains
3169
Comment
CLARK-A1528-6100
Astragalus kentrophyta subsp. implexus
John C. Roos
1967-8-5
Inyo
Inyo Mountains
Comment
NY675228
Astragalus kentrophyta var. elatus
J. C. Roos
1952-7-26
5820
Inyo
East side Reed Flat at head of Birch Creek, White Mountains
3048
Comment
RSA74601
Astragalus kentrophyta var. elatus
J. C. Roos, Lucille Roos
1952-7-26
5820
Inyo
East side Reed Flat at head of Birch Creek, White Mts.
3049
Comment
UCR23906
Astragalus layneae
John C. Roos, L. Roos
1955-4-7
6300
Inyo
Northern Mojave Desert, N end of Saline Valley near Waucoba Wash
1616
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
RSA45524
Astragalus lentiginosus var. borreganus
J. C. Roos, Lucille Roos
1949-4-7
4166
Imperial
West of Yuma Sand Dunes, near All American Canal.
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
RSA44247
Astragalus minthorniae var. villosus
J. C. Roos
1949-5-29
3540
San Bernardino
Greene Mine, N side of Clark Mtn.
1585
Comment
CAS-BOT-BC178071
Astragalus nuttallianus
J. C. Roos
1958-3-15
s.n.
Riverside
3 miles S.E. of Desert Center, in the Chuckwalla Mtns.
Comment
UCR26496
Astragalus oophorus
John C. Roos
1947-7-13
2831
Inyo
Northern Mojave /Great Basin Desert, Panamint Mtns, Arcane Meadows, between Baldy [=Rogers?] and Telescope Peaks
3018
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
CLARK-A1528-2754
Astragalus oophorus
John C. Roos
1952-7-29
5857
Inyo
White Mountains
3078
Comment
POM262991B
Astragalus palmeri
J. C. Roos
1937-6-10
492
San Diego
Summit above Mountain Spring(s).
Comment
CAS-BOT-BC192811
Astragalus platytropis
J. C. Roos; A. R. Roos
1953-8-9
5961
Inyo
Near head of Tamarack Canyon, Inyo Mts.
3078
Comment
CAS-BOT-BC192812
Astragalus platytropis
J. C. Roos
1955-7-21
6481
Inyo
On north slope Whitetop Peak, Last Chance Mountains
2499
Comment
UC1023404
Astragalus platytropis
J. C. and A. R. Roos
1953-8-9
5961
Inyo
near head Tamarack Canyon (Inyo Mts.); , near head Tamarack Canyon
3078
Comment
CLARK-A1528-2755
Astragalus pomonensis
John C. Roos
1965-6-27
San Bernardino
Loma Linda
304
Comment
RSA79695
Astragalus purshii var. lectulus
J. C. Roos, A. R. Roos
1953-8-9
5957
Inyo
Tamarack Canyon
3048
Comment
RSA105023
Astragalus serenoi
J. C. Roos
1955-5-15
6372
Inyo
Last Chance Mountains: 0.5 miles west of Willow Springs.
1767
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
RSA450305
Astragalus tricarinatus
J. C. Roos
1948-5-8
3826
Riverside
Whitewater.
518
Comment
CLARK-A1528-1158
Astragalus trichopodus subsp. antisellii
John C. Roos
1937-3-26
694
Kern
152
Comment
RSA44239
Astrolepis cochisensis subsp. cochisensis
J. C. Roos
1949-5-29
3532
San Bernardino
North side of Clark Mountain
1463
Comment
CLARK-A1528-2535
Atriplex argentea
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
RSA79495
Atriplex canescens
J. C. Roos, A. Roos
1953-8-14
6031
Inyo
Al Rose Canyon; Inyo Mts.
2134
Comment
UCR18888
Atriplex canescens
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
CLARK-A1528-2545
Atriplex confertifolia
John C. Roos
1938-4-18
Inyo
Death Valley National Park
Comment
GH376344
Atriplex confertifolia
J. C. Roos & A. R. Roos
1953-8-10
5978
Unknown
Mazourka Canyon, Inyo Mts.
2438
Comment
LA102330
Atriplex confertifolia
John C. Roos;
1949-5-14
4307
San Bernardino
Rabbit Spring, Lucerne Valley
Comment
UCSB42261
Atriplex coronata
Roos, John
1965-6-30
Riverside
Perris
Comment
RSA591763
Atriplex coronata var. notatior
J. C. Roos
1965-6-30
s.n.
Riverside
Perris.
Comment
SEINET3931219
Atriplex coronata var. notatior
John Roos
1952-1
Riverside
Comment
UCR24121
Atriplex coronata var. notatior
John C. Roos
1965-6-30
s.n.
Riverside
Perris-Aguanga Basin region, Perris
Comment
CLARK-A1528-1190
Atriplex elegans subsp. fasciculata
John C. Roos
1965-7-6
San Bernardino
Barstow
Comment
CLARK-A1528-2514
Atriplex elegans subsp. fasciculata
John C. Roos
1949-4-6
4141
Imperial
Pope Hot Springs
Comment
CLARK-A1528-6886
Atriplex elegans subsp. fasciculata
John C. Roos
1965-7-6
San Bernardino
Barstow
Comment
SEINET4133816
Atriplex elegans subsp. fasciculata
Roos
1965-7-6
s.n.
San Bernardino
Roadside of Barstow.; 0
Comment
CLARK-A1528-2520
Atriplex hymenelytra
John C. Roos
1947-2-1
3221
Riverside
Painted Canyon
Comment
CLARK-A1528-2521
Atriplex hymenelytra
John C. Roos
1937-12-28
Inyo
Olancha
Comment
CAS-BOT-BC169156
Atriplex lentiformis
John Roos
1950-10-31
5022
San Bernardino
237 South Waterman Ave., San Bernardino
320
Comment
GH376424
Atriplex lentiformis
J. C. Roos
1950-10-31
5022
Unknown
237 South Waterman Ave.
320
Comment
RSA92770
Atriplex lentiformis
J. C. Roos, L. Roos
1954-10-2
6252
San Bernardino
237 S Waterman.
320
Comment
UCR24122
Atriplex minuscula
John C. Roos
1940-6-8
1910
Fresno
San Joaquin Valley, about 25 mi west of Fresno
Comment
CLARK-A1528-5408
Atriplex parryi
John C. Roos
1950-4-7
4726
Inyo
Tecopa
426
Comment
RSA658705
Atriplex parryi
J. C. Roos
1965-7-11
s.n.
Inyo
Amargosa River.
Comment
RSA92759
Atriplex parryi
J. C. Roos, A. Roos
1954-8-15
6226
Inyo
Lower Warm Spring, Saline Valley.
427
Comment
CLARK-A1528-2500
Atriplex phyllostegia
John C. Roos
1940-6-25
1891
Kern
Bakersfield
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
CAS-BOT-BC176549
Atriplex polycarpa
J. C. Roos
1965-7-6
s.n.
San Bernardino
At the cement plant, Victorville
Comment
RSA662437
Atriplex polycarpa
J. C. Roos
1965-7-6
1965
San Bernardino
At the cement plant, Victorville.
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
RSA52771
Atriplex prostrata
J. C. Roos, L. Roos
1950-7-24
4875
Kern
Monolith Lake
1189
Comment
CLARK-A1528-2502
Atriplex rosea
Alfred R. Roos
1948-8-21
Los Angeles
Long Beach
Comment
UCR18901
Atriplex rosea
John C. Roos
1965-8-4
s.n.
Riverside
San Bernardino Valley, Arlington area, Riverside
Comment
CLARK-A1528-2501
Atriplex rosea
John C. Roos
1949-11-27
4702
Kern
Monolith Dry Lake
1203
Comment
CLARK-A1528-401
Atriplex semibaccata
John C. Roos
1951-9-25
5278
Riverside
Riverside
259
Comment
UCR25177
Atriplex triangularis
John C. Roos, L. Roos
1950-11-21
5025
Kern
Tehachapi Mtns., Monolith Dry Lake [= Proctor Lake], near Tehachapi Pass
1189
Comment
UCR31331
Atriplex triangularis
John C. Roos
1950-7-24
4879
Kern
Tehachapi Mtns., Monolith Dry Lake [= Proctor Lake]
1189
Comment
UCR24109
Atriplex truncata
John C. Roos
1950-6-24
4844
San Bernardino
Mojave Desert, Rabbit Springs
884
Comment
CLARK-A1528-4494
Avena barbata
John C. Roos, Lucille Roos
1950-4-15
4738
Riverside
Box Springs Mountains
457
Comment
RSA0034604
Avena barbata
J. C. Roos
1965-6-6
s.n.
San Bernardino
Mill Creek. San Bernardino Mountains.
Comment
CLARK-A1528-1269
Avena sativa
John C. Roos
1939-4-16
257
Napa
Angwin
Comment
CLARK-A1528-4071
Azolla filiculoides
John C. Roos
1947-2-27
3269
San Bernardino
Colton
Comment
RSA431203
Baccharis brachyphylla
J. C. Roos
1958-9-27
s.n.
Riverside
Carrizo Creek near Black Hhill, Santa Rosa Mtns
915
Comment
RSA45533
Baccharis brachyphylla
J. C. Roos
1949-4-2
4133
Riverside
Near Palm oasis in the side canyon of Whitewater Canyon.
549
Comment
RSA89967
Baccharis brachyphylla
J. C. Roos
1950-10-15
5008
Riverside
San Bernardino Mtns. Dry Morongo Canyon, c. l mi south of Riverside-San Bernardino county line.
612
Comment
CLARK-A1528-2037
Baccharis emoryi
John C. Roos
1940-9-1
240
San Bernardino
Reche Canyon
Comment
UCR30559
Baccharis glutinosa
John C. Roos
1948-8-28
3959
Sonoma
North Coast Ranges, near Healdsburg
31
Comment
RSA48878
Baccharis salicifolia
J. C. Roos
1949-9-21
4664
Riverside
Reche Canyon, 2.7 miles south of Hollow Hill Dairy
457
Comment
CLARK-A1528-1630
Baccharis sarothroides
John C. Roos, Lucille Roos
1950-8-19
4937
San Diego
Hodges Dam
121
Comment
UCR23307
Baccharis sarothroides
John C. Roos, L. Roos
1950-10-28
5021
Riverside
Box Springs
473
Comment
UCSB42282
Baccharis sarothroides
Roos, John
1965-9-18
Inyo
Wild Rose Canyon, Panamint Mtns.
Comment
CLARK-A1528-1631
Baccharis sergiloides
John C. Roos
1949-9-17
4660
Riverside
Whitewater Wash
609
Comment
UCR19179
Baccharis sergiloides
John C. Roos
1948-9-14
3003
Riverside
Santa Rosa Mtns, Dos Palmas Spring, east of Asbestos Mountain
1070
Comment
CLARK-A1528-1641
Bahia dissecta
John C. Roos
1946-8-27
2923
Riverside
Santa Rosa Mountains
2285
Comment
RSA450760
Bahiopsis parishii
J. C. Roos
1965-9-26
s.n.
Riverside
Santa Rosa Mtns.
701
Comment
UCR25401
Baileya pleniradiata
John C. Roos
1946-10-4
3125
San Bernardino
Mojave Desert, Lone Star Ranch [Yucca Valley; the site of a gas station north of Joshua Tree Nat. Mon.]
Comment
UCR23598
Barbarea orthoceras
John C. Roos
1947-6-14
3673
San Bernardino
San Bernardino Mtns, near Crestline, behind the Crestline Bowl
1433
Comment
UCSB45938
Bassia hyssopifolia
Roos, John
1965-7-3
San Bernardino
Loma Linda
Comment
CLARK-A1528-1650
Bellis perennis
John C. Roos
1966-3-6
San Bernardino
Redlands
Comment
CHSC127
Berberis aquifolium var. dictyota
F. Roos
1930-4-5
Butte
Paradise.
548
Comment
CLARK-A1528-2274
Berberis dictyota
John C. Roos
1947-1-4
3197
Riverside
Reche Canyon
487
Comment
CLARK-A1528-7860
Berberis dictyota
John C. Roos
1940-2-17
890
Riverside
Reche Canyon
Comment
CAS-BOT-BC75740
Berberis nevinii
John C. Roos
1949-5-6
3526
San Bernardino
San Timoteo Canyon, south of Redlands.
Comment
CLARK-A1528-2269
Berberis nevinii
John C. Roos
1966-2-10
Riverside
San Timoteo Canyon
Comment Read comments Mar 12 2014
CLARK-A1528-5129
Berberis nevinii
John C. Roos
1950-2-11
4705
San Bernardino
Scott's Canyon
426
Comment
RSA659182
Berberis nevinii
J. C. Roos
1966-2-10
s.n.
San Bernardino
San Timoteo Canyon, south of Redlands.
Comment
SBBG28470
Berberis nevinii
J. C. Roos
1949-3-6
3525
San Bernardino
branch of San Timoteo Cyn, S of Redlands
426
Comment
UCD94995
Berberis nevinii
J. C. Roos
1966-2-10
s.n.
San Bernardino
San Timoteo Canyon, south of Redlands.
Comment
UCR18762
Berberis nevinii
John C. Roos
1947-4-12
3564
San Bernardino
San Bernardino Valley, San Timoteo Canyon, 1.3 mi SE of Redlands Station
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
UCSB46877
Berberis nevinii
Roos, John
1966-2-10
San Bernardino
San Timoteo Canyon, south of Redlands
Comment
HSC78521
Bergia texana
J. C. Roos
1952-5-28
5730
Riverside
San Jacinto River bottomland, 1 mi. SE of Perris.
427
Comment
CLARK-A1528-1651
Bidens frondosa
John C. Roos, Lucille Roos
1954-10-9
6254
Ventura
Lake Sherwood
300
Comment
POM251754
Boerhavia
J. C. Roos
1937-8-20
12
Riverside
East of Desert Center.
Comment
CLARK-A1528-3264
Boerhavia annulata
John C. Roos, Lucille Roos
1954-11-24
6261
Inyo
Inyo Mountains
563
Comment
CLARK-A1528-3265
Boerhavia annulata
John C. Roos
1955-4-6
6290
Inyo
Inyo Mountains
487
Comment
CLARK-A1528-5369
Boerhavia annulata
John C. Roos, Lucille Roos
1954-11-24
6261
Inyo
Inyo Mountains
563
Comment
RSA104837
Boerhavia annulata
J. C. Roos
1955-5-13
6350
Inyo
West base Last Chance Mountains northeast of Eureka Valley sand dunes.
1159
Comment
RSA78222
Boerhavia intermedia
J. C. Roos, L. Roos
1952-10-18
5901
Riverside
Hidden Valley Campground
1220
Comment
CAS-BOT-BC434563
Boerhavia wrightii
John Roos; Lucille Roos
1950-10-21
5018
San Bernardino
Twenty-nine Palms, Mohave Desert.
579
Comment
UC1010320
Boerhavia wrightii
John and Lucille Roos
1950-10-21
5018
San Bernardino
Mohave Desert, Twenty-nine Palms
579
Comment
RSA450459
Bothriochloa barbinodis
J. C. Roos
1965-10-10
s.n.
San Diego
Otay Lake
Comment
UCR23964
Bothriochloa barbinodis
John C. Roos
1946-9-14
3027
Riverside
Santa Rosa Mtns, E of Pinyon Flats
1159
Comment
CAS-BOT-BC145587
Bouteloua aristidoides
J. C. Roos
1965-9-5
s.n.
Riverside
Desert Center.
Comment
UCR23965
Bouteloua aristidoides
John C. Roos
1946-9-14
3026
Riverside
Santa Rosa Mtns., Pinyon Flats
1220
Comment
UCR23966
Bouteloua aristidoides
John C. Roos
1949-3-19
4110
Riverside
Sonoran (Colorado) Desert, Mouth of Shaver's Wash near Mecca
Comment
UCSB51403
Bouteloua aristidoides
John C. Roos
1946-9-14
3026
Riverside
collected in in the Inyon Flats, in the Santa Rosa Mountains Pinyon Flats
1219
Comment
CLARK-A1528-4510
Bouteloua barbata
John C. Roos
1950-9-1
4950
San Bernardino
Valley Well Station
1127
Comment
CLARK-A1528-4512
Bouteloua barbata
John C. Roos
1946-9-14
3025
Riverside
San Jacinto Mountains
1219
Comment
RSA157908
Bouteloua barbata
J. C. Roos, A. R. Roos
1955-8-23
6531
Inyo
Canyon at West base Last Chance Mountains, east of Eureka Valley sand dunes.
1220
Comment
UCR23972
Bouteloua barbata
John C. Roos
1946-9-14
3025
Riverside
Santa Rosa Mtns., Pinyon Flats
1220
Comment
UCSB42284
Bouteloua barbata
John C. Roos
1965-9-5
Riverside
collected 18.0 mi W Blythe - Blythe
Comment
CAS-BOT-BC145605
Bouteloua barbata var. barbata
J. C. Roos
1965-9-5
s.n.
Riverside
18 miles west of Blythe.
Comment
RSA41332
Bouteloua curtipendula
J. C. Roos
1948-5-2
1122
Riverside
Wonderland of Rocks, Joshua Tree National Monument.
Comment
UCR23974
Bouteloua curtipendula
John C. Roos
1949-6-22
4442
San Bernardino
Eastern Mojave Desert, New York Mountains, north side of the mouth of Keystone Canyon
1677
Comment
LA102207
Bouteloua eriopoda
John C. Roos;
1958-9-28
sn
Riverside
Santa Rosa Mountains, Abestos Spring, Pinon Flats
1219
Comment
UC1023428
Bouteloua eriopoda
John C. Roos
1950-9-3
4975
San Bernardino
canyon slope s Clark Mtn. (nw of Mountain Pass); eastern Mohave Desert
1828
Comment
CLARK-A1528-4524
Bouteloua gracilis
John C. Roos
1949-9-18
4062
San Bernardino
Clark Mountain
Comment
UC1236250
Brickellia atractyloides
John C. Roos
1955-5-13
6337
Inyo
e of Eureka Valley sand dunes; Last Chance Mts. (west base)
1219
Comment
CLARK-A1528-1662
Brickellia californica
John C. Roos
1949-9-3
4649
Inyo
Kingston Mountains
1523
Comment
RSA450418
Brickellia californica
J. C. Roos
1965-9-11
s.n.
San Bernardino
Mill creek, San Bernardino Mountains
Comment
UCR19543
Brickellia californica
John C. Roos
1948-9-18
4057
San Bernardino
Eastern Mojave Desert, north slope of Clark Mountain
1829
Comment
CLARK-A1528-2039
Brickellia desertorum
John C. Roos
1950-9-30
4994
Riverside
Box Springs Mountains
457
Comment
GH386537
Brickellia desertorum
J. C. Roos & L. Roos
1950-9-30
4994
Unknown
north base of Pigeon Pass, Box Springs Mts.
457
Comment
RSA48847
Brickellia desertorum
J. C. Roos
1949-9-21
4665
Riverside
E slope of rocky ridge in pass between Reche Canyon & Pigeon Pass
457
Comment Read comments Dec 5 2014
RSA89879
Brickellia desertorum
J. C. Roos, L. Roos
1950-10-14
5006
Riverside
E end Jurupa Hills, near corner of Alta & Canal Sts.
305
Comment
UCR20317
Brickellia desertorum
John C. Roos
1949-9-17
4662
Riverside
San Bernardino Mtns / Sonoran (Colorado) Desert, E side Whitewater Canyon, 2.2 mi. north of Hwy 99 [=I-10]; W side of Painted Hill
612
Comment
UCR25197
Brickellia desertorum
John C. Roos
1950-12-2
5029
Riverside
Sonoran (Colorado) Desert, Eagle Mountains, Munsen ['Monson'] Canyon
1067
Comment
CLARK-A1528-1673
Brickellia incana
John C. Roos
1947-11-1
3751
Riverside
Eagle Mountains
Comment
RSA450417
Brickellia incana
J. C. Roos
1961-10-22
s.n.
Inyo
West side of Owens Lake, near Columbia Southern Chemical Company.
Comment
UC1043017
Brickellia longifolia
John and Lucille Roos
1954-3-27
6058
Inyo
Klare Spring, Titus Canyon, Grapevine Mts. Death valley.
914
Comment
RSA34194
Brickellia microphylla
J. C. Roos
1947-9-18
2793
Inyo
Wildrose Canyon at Kilns
Comment
RSA79496
Brickellia microphylla
J. C. Roos, A. R. Roos
1953-8-14
6029
Inyo
Al Rose Canyon, Inyo Mountains.
2134
Comment
CAS-BOT-BC127658
Brickellia microphylla var. microphylla
J. C. Roos; A. R. Roos
1955-8-23
6526
Inyo
dry rocky canyon along Loretto road 2 miles S.W. of Loretto mine, east slope Inyo Mts.
1676
Comment
RSA34192
Brickellia multiflora
J. C. Roos
1947-9-20
2813
Inyo
Emigrant Wash above Emigrant Spring. Panamint Mts.
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
CLARK-A1528-1683
Brickellia multiflora
John C. Roos
1947-9-18
2792
Inyo
Panamint Mountains
1066
Comment
CLARK-A1528-2038
Brickellia multiflora
John C. Roos
1956-9-30
6603
Inyo
Panamint Range
Comment
UCR19493
Brickellia oblongifolia
John C. Roos
1949-6-27
4519
San Bernardino
Eastern Mojave Desert, north side of Kingston Mtns
2134
Comment
UCR30626
Brickellia oblongifolia
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-A1528-5013
Brickellia oblongifolia var. linifolia
John C. Roos
1949-6-27
4519
San Bernardino
Kingston Mountains
1767
Comment
RSA47470
Brickellia oblongifolia var. linifolia
J. C. Roos
1949-5-28
4335
San Bernardino
North slope of washes, Clark Mtn, near Green's Mine
1616
Comment
RSA79664
Brickellia oblongifolia var. linifolia
J. C. Roos, A. R. Roos
1953-8-8
5944
Inyo
NW rim of Badger Flat, Inyo Mts.
2591
Comment
UCD129645
Brickellia oblongifolia var. linifolia
J. C. Roos
1946-8-27
2917
Riverside
Santa Rosa Mountain.
1371
Comment
UCR23970
Briza maxima
John C. Roos
1957-7-2
6636
Mendocino
Point Arena Lighthouse, on the coast
15
Comment
POM266487
Briza maxima
J. C. Roos
1940-6-14
834
Monterey
In pine forest.
Comment
CAS-BOT-BC132193
Brodiaea filifolia
John C. Roos
1952-5-14
5667
Riverside
San Jacinto River bottom 1 mile east of Perris
426
Comment
CLARK-A1528-1522
Brodiaea filifolia
John C. Roos
1952-5-14
5667
Riverside
San Jacinto River
426
Comment
CLARK-A1528-2793
Brodiaea lutea var. anilina
John C. Roos
1951-5-27
5049
Mariposa
Mariposa
1005
Comment
UCR25753
Brodiaea terrestris subsp. kernensis
John C. Roos
1937-7-31
2349
San Bernardino
Transverse Ranges/San Bernardino Mtns, Twin Peaks Post Office
1768
Comment
RSA44263
Bromus arenarius
J. C. Roos
1949-6-22
3547
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
RSA85126
Bromus arizonicus
J. C. Roos
1952-4-9
5473
Riverside
east base of Mt. Rubidoux
274
Comment
UCR20584
Bromus arizonicus
John C. Roos
1952-4-9
5473
Riverside
Riverside, E base of Mt. Rubidoux
274
Comment
RSA450462
Bromus berteroanus
J. C. Roos
1969-5-10
s.n.
Kern
An alkaline seep in Red Rock Canyon.
Comment
CLARK-A1528-4532
Bromus carinatus
John C. Roos
1937-6-18
1239
San Diego
Palomar Mountain
Comment
CAS-BOT-BC148734
Bromus carinatus var. marginatus
J. C. Roos
1965-7-17
s.n.
San Bernardino
San Bernardino Mountains. Barton Flats.
Comment
CAS-BOT-BC148735
Bromus carinatus var. marginatus
J. C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mountains. Moonridge, Bear Valley.
Comment
UCSB51398
Bromus carinatus var. marginatus
Roos, John
1965-6-26
San Bernardino
Upper Santa Ana Canyon near Heart Bar Park, San Bernardino Mtns.
Comment
UCSB51392
Bromus catharticus
Roos, A.
1937-11-13
Riverside
San Bernardino Basin region, Riverside
243
Comment Read comments May 21 2011
UCR19657
Bromus hallii
John C. Roos
1965-7-17
s.n.
San Bernardino
San Bernardino Mtns, Stetson Creek, Barton Flats
1951
Comment
LA102184
Bromus japonicus
John C. Roos;
1950-6-11
4830
San Bernardino
Loma Linda, W central
304
Comment
UCR23962
Bromus japonicus
John C. Roos
1950-6-11
4830
San Bernardino
San Bernardino Valley, Loma Linda, W Central Street
305
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
CLARK-A1528-1274
Bromus porteri
John C. Roos, Lucille Roos
1951-8-8
5095
Inyo
White Mountains
3169
Comment
CLARK-A1528-4550
Bromus rubens
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4552
Bromus rubens
John C. Roos
1937-5-1
1409
Riverside
La Sierra
Comment
RSA0019812
Bromus tectorum
J. C. Roos
1937-5-9
2087
San Bernardino
Oak Glen, San Bernardino Mountains.
1220
Comment
CLARK-A1528-4560
Bromus trinii
John C. Roos
1969-5-10
Kern
Red Rock Canyon
Comment
CLARK-A1528-4561
Bromus trinii
John C. Roos, Lucille Roos
1953-3-21
5909
Riverside
Andreas Canyon
274
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
UC1043018
Bromus trinii
John and Lucille Roos
1952-5-24
5711
Riverside
hills n of Moreno
518
Comment
UCR23981
Bromus trinii
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment
UCR23982
Bromus trinii
John C. Roos
1962-3-24
s.n.
Riverside
San Bernardino Mtns., Whitewater Canyon
854
Comment
CLARK-A1528-3811
Calandrinia ambigua
John C. Roos
1949-5-5
4098
Riverside
Orocopia
Comment
CLARK-A1528-2363
Callitriche marginata
John C. Roos
1952-4-16
5540
Riverside
Edgemont
Comment
UCSB45513
Callitriche palustris
Roos, John
1957-7-2
Sonoma
Miller's Ridge
Comment
UCR25305
Callitriche verna
John C. Roos
1957-7-2
6644
Sonoma
Miller Ridge
Comment
CLARK-A1528-5066
Calocedrus decurrens
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
RSA664194
Calocedrus decurrens
J. C. Roos
1965-6-6
s.n.
San Bernardino
Mill Creek. San Bernardino Mountains.
Comment
UC1234869
Calochortus bruneaunis
J. C. Roos
1955-6-17
6410
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment
CAS-BOT-BC132310
Calochortus catalinae
J. C. Roos
1956-4-8
6573
Ventura
North slope of Bony Mtn., Potrero Valley
Comment
CLARK-A1528-3187
Calochortus concolor
John C. Roos, Lucille Roos
1952-6-14
5772
San Bernardino
San Bernardino Mountains
1158
Comment
CLARK-A1528-3189
Calochortus invenustus
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR20333
Calochortus panamintensis
John C. Roos, L. Roos
1954-6-25
6153
Inyo
Inyo Mtns., North end of Badger Flat
2683
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
UCR24141
Calochortus striatus
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment Read comments Oct 23 2014
UCR25934
Calystegia fulcrata
John C. Roos
1949-7-16
4565
San Bernardino
San Bernardino Mtns., Moonridge Ski Area, Bear Valley
2256
Comment
CLARK-A1528-7873
Calystegia longipes
John C. Roos
1952-6-8
5747
Riverside
Reche Canyon
579
Comment
UCR24124
Calystegia macrostegia
John C. Roos
1950-4-22
4748
Riverside
Pigeon Pass.
457
Comment
UCR18965
Calystegia sepium subsp. binghamiae
John C. Roos, L. Roos
1952-6-10
5763
Riverside
San Bernardino Valley Region, Fairmont Park in Riverside, edge of lake
259
Comment
CAS-BOT-BC199285
Calystegia sepium subsp. limnophila
J. C. Roos; A. R. Roos
1950-8-7
4919
Riverside
Riverbottom along Spring Brook between Lake Evans (Fairmont Park) and the Santa Ana River at the Mission Bridge, along bike path, vicinity of old Boy Scout camp
238
Comment
RSA659475
Camissonia brevipes
J. C. Roos
1949-4-9
4216
San Bernardino
Whipple Mtns, NW of Crossroads.
Comment
UCR26167
Camissonia brevipes subsp. brevipes
John C. Roos, Lucille Roos
1949-4-9
4216
San Bernardino
Sonoran (Colorado) Desert, NW of Cross Roads, Whipple Mtns.
183
Comment
RSA265815
Camissonia campestris subsp. campestris
J. C. Roos
1937-3-25
2183
Kern
plains below Grapevine.
Comment
RSA85156
Camissonia campestris subsp. campestris
J. C. Roos
1952-4-22
5568
San Bernardino
1 mile west of Colton along highway 99.
305
Comment
CLARK-A1528-3325
Camissonia cheiranthifolia
Alfred R. Roos
1956-5-22
Los Angeles
9
Comment
CLARK-A1528-3350
Camissonia heterochroma
John C. Roos, Alfred R. Roos
1954-8-14
6213
Inyo
Inyo Mountains
2316
Comment
RSA89048
Camissonia heterochroma
J. C. Roos, A. R. Roos
1954-8-14
6213
Inyo
0.4 miles north of The Narrows, Marble Canyon, Inyo Mts.
2317
Comment
CLARK-A1528-2660
Camissonia hirtella
John C. Roos
1937-5-10
2187
Riverside
Elsinore
Comment
CLARK-A1528-3330
Camissonia kernensis subsp. gilmanii
John C. Roos
1952-4-22
5568
San Bernardino
304
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
UCR23527
Camissonia pusilla
John C. Roos
1955-5-15
6363
Inyo
Northern Mojave Desert, Last Chance Mtns., 0.5 mi. west of Willow Spring
1768
Comment
CLARK-A1528-3362
Camissonia strigulosa
John C. Roos
1943-8-8
2703
Riverside
San Jacinto Mountains
1615
Comment
OBI33206
Camissoniopsis bistorta
J. C. Roos
1947-3-15
3345
Riverside
Valle Vista, San Jacinto Valley
549
Comment
CLARK-A1528-1117
Capsella bursa-pastoris
John C. Roos
1943-4-4
2619
San Bernardino
San Bernardino
320
Comment
UCD114528
Cardamine pensylvanica
A. R. Roos
1958-6-12
s.n.
Los Angeles
Evans and Reeves Nursery. Brentwood, in west Los Angeles.
Comment
POM302513
Carex douglasii
J. C. Roos
1943-10-16
2739
San Bernardino
Little San Bernardino Mountains.
1524
Comment
RSA41335
Carex douglasii
J. C. Roos
1943-10-16
2739
Riverside
Little San Bernardino Mountains.
1372
Comment
RSA48687
Carex subfusca
J. C. Roos
1949-8-13
4606
San Bernardino
Copper Queen Mine, Keystone Canyon, New York Mountains
1829
Comment
RSA664100
Carthamus tinctorius
J. C. Roos, L. Roos
1956-9-2
6599
Sonoma
Healdsburg dump
Comment
UCR18827
Cassiope mertensiana
John C. Roos
1967-9-16
s.n.
Inyo
Sierra Nevada Mtns., Big Pine Creek on ridge below Palisade Glacier
3598
Comment
CLARK-A1528-4081
Castela emoryi
John C. Roos
1939-6-11
Imperial
91
Comment
UCR24411
Castela emoryi
John C. Roos
1937-8-20
1223
Riverside
Sonoran (Colorado) Desert, Hayfields about 5-10 miles west of Desert Center
Comment
CLARK-A1528-5731
Castilleja affinis
John C. Roos
1937-5-10
2075
Riverside
Perris
Comment
UCR25604
Castilleja exserta
John C. Roos
1952-4-16
5558
Riverside
Box Springs Mountains, Pigeon Pass
457
Comment
UCR25605
Castilleja exserta
John C. Roos
1941-4-19
173
Riverside
Peninsular Range, Loma Linda Hills/Box Springs Mtns.; plateau in Reche Canyon
671
Comment
UCR24410
Castilleja lemmonii
John C. Roos
1965-8-8
s.n.
Fresno
Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park
3354
Comment
CLARK-A1528-4182
Castilleja miniata
John C. Roos
1940-7-16
1853
San Bernardino
San Bernardino Mountains
Comment
UC1234668
Castilleja minor subsp. minor
J. C. and A. R. Roos
1955-8-28
6568
Inyo
3 mi n Olancha; Owens Lake
1091
Comment
CLARK-A1528-1226
Castilleja nana
Alfred R. Roos, John C. Roos
1953-8-9
5960
Inyo
Inyo Mountains
3047
Comment
RSA79692
Castilleja nana
J. C. Roos, A. R. Roos
1953-8-9
5960
Inyo
Near head of Tamarack Canyon
3049
Comment
UC1023408
Castilleja nana
J. C. and A. R. Roos
1953-8-9
5960
Inyo
near head of Tamarack Canyon; Inyo Mountains
3048
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
UCR30594
Caulanthus heterophyllus var. heterophyllus
John C. Roos, L. Roos
1954-4-10
6065
San Diego
Peninsular Range, San Pasqual
152
Comment
RSA89043
Caulostramina jaegeri
J. C. Roos, L. Roos
1954-6-29
6185
Inyo
Inyo Mountains; The Narrows, Marble Canyon
2195
Comment
CLARK-A1528-3883
Ceanothus crassifolius
John C. Roos
1942-3-7
1105
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3897
Ceanothus oliganthus
John C. Roos
1942-3-7
1106
Los Angeles
La Canada
Comment
POM265805
Ceanothus oliganthus var. oliganthus
J. C. Roos
1942-3-21
1097
Los Angeles
Chantry Flats, Santa Anita Canyon
Comment
CLARK-A1528-3899
Ceanothus papillosus subsp. roweanus
John C. Roos
1960-5-30
Orange
Santa Ana Mountains
1066
Comment
UCR23477
Ceanothus tomentosus subsp. olivaceus
John C. Roos
1966-3-31
s.n.
San Bernardino
San Bernardino Valley, in the hills of San Timoteo Canyon, near Redlands Blvd
305
Comment
CLARK-A1528-4384
Celtis reticulata
John C. Roos
1962-5-7
San Bernardino
Yucaipa
822
Comment
RSA47313
Celtis reticulata
J. C. Roos, L. Roos
1949-6-25
4493
San Bernardino
Narrow canyon near spring, E face Clark Mountain.
1524
Comment
UCR20322
Centaurea repens
John C. Roos
1947-7-5
2908
Riverside
junction of San Timoteo and Live Oak Creeks
459
Comment
UCR23330
Centaurea repens
John C. Roos
1948-10-16
s.n.
San Bernardino
San Bernardino Valley, Wildwood Canyon [=Yucaipa Creek, becomes Live Oak Canyon] near San Timoteo Canyon
Comment
CLARK-A1528-5429
Centaurium calycosum
John C. Roos
1965-7-11
Inyo
Tecopa
Comment
CLARK-A1528-2946
Centaurium venustum
John C. Roos
1952-6-13
5766
Riverside
Reche Canyon
457
Comment
CLARK-A1528-3940
Cephalanthus occidentalis var. californicus
John C. Roos
1965-8-21
Tulare
Sequoia National Park
609
Comment
CAS-BOT-BC388159
Cerastium fontanum
John C. Roos
1952-5-12
5658
San Bernardino
Loma Linda
320
Comment
POM265645
Cerastium fontanum subsp. vulgare
J. C. Roos
1937-3-8
1303
San Bernardino
Loma Linda, San Bernardino Valley.
Comment
RSA79649
Cercocarpus intricatus
J. C. Roos, A. R. Roos
1953-8-10
5975
Inyo
Inyo Mountains, Mazourka Canyon.
2470
Comment
UC1234831
Cercocarpus intricatus
J. C. Roos
1955-6-19
6452
Inyo
2 mi w of Last Chance Spring (summit ridge of Last Chance Mountains); Last Chance Mountains
2560
Comment
SD52931
Cercocarpus intricatus
J. C. Roos
1955-6-19
6452
Inyo
Summit ridge of Last Chance Mountains, 2 miles west of Last Chance Spring.
2560
Comment
CLARK-A1528-3983
Cercocarpus ledifolius
John C. Roos
1965-6-6
San Bernardino
Mill Creek
Comment
RSA450098
Cercocarpus ledifolius
J. C. Roos
1965-6-6
s.n.
San Bernardino
San Bernardino Mtns, Mill Creek near Fallsvale.
Comment
RSA79485
Cercocarpus ledifolius
J. C. Roos, A. R. Roos
1953-8-13
6009
Inyo
Tamarack Canyon.
2744
Comment
CAS-BOT-BC136946
Cercocarpus ledifolius var. intricatus
J. C. Roos; A. R. Roos
1953-8-10
5975
Inyo
Mazourka Canyon, Inyo Mts.
2468
Comment
UC1042981
Cercocarpus ledifolius var. intricatus
John and Lucille Roos
1954-6-26
6157
Inyo
Tamarack Canyon Inyo Mts.
2743
Comment
CLARK-A1528-7792
Chaenactis douglasii var. douglasii
John C. Roos, Alfred R. Roos
1953-8-10
5974
Inyo
Inyo Mountains
2560
Comment
UCR20320
Chaenactis douglasii var. douglasii
John C. Roos
1947-7-12
2897
Inyo
Panamint Mtns., upper Wildrose Canyon, near Mahogany Flats
2409
Comment
CLARK-A1528-1697
Chaenactis glabriuscula
John C. Roos
1937-3-26
2478
Santa Barbara
Cuyama Valley
Comment
RSA450414
Chaenactis santolinoides
J. C. Roos
1965-6-26
s.n.
San Bernardino
San Bernardino Mountains probably near Barton Flats.
Comment
RSA155682
Chaenactis stevioides var. stevioides
J. C. Roos
1955-6-20
6461
Inyo
Last Chance Mtns near Willow Spring.
1768
Comment
CAS-BOT-BC106012
Chaetadelpha wheeleri
John C. Roos
1955-5-13
6357
Inyo
Southeast end Eureka Valley
975
Comment
UCR23737
Chaetadelpha wheeleri
John C. Roos
1955-5-13
6357
Inyo
Northern Mojave Desert, Eureka Valley dunes
976
Comment
UCR23510
Chamaebatia foliolosa
John C. Roos
1942-7-2
1259
Mariposa
Sierra Nevada Mtns., Fresno Road out of Yosemite Park near Wawona
1220
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
CLARK-A1528-3584
Cheilanthes feei
John C. Roos
1937-4-26
1800
San Bernardino
Mitchell Caverns
Comment
UCR18784
Cheilanthes feei
John C. Roos
1949-6-19
4400
San Bernardino
Eastern Mojave Desert, Clark Mountain
1890
Comment
CLARK-A1528-2554
Chenopodium album
John C. Roos
1965-7-4
San Bernardino
Loma Linda
304
Comment
UCSB42266
Chenopodium fremontii
Roos, John
1966-8-6
San Bernardino
Cienega Seca Creek, Heart Bar Ranch, San Bernardino Mtns.
Comment
CLARK-A1528-2564
Chenopodium incanum
John C. Roos
1950-9-1
4960
San Bernardino
Clark Mountains
1645
Comment
CLARK-A1528-2565
Chenopodium incanum
John C. Roos
1937-8-25
1198
San Bernardino
Barnwell
Comment
RSA85647
Chenopodium incanum var. occidentale
J. C. Roos, A. Roos
1950-8-7
4922
San Bernardino
Drainage from watering trough at Beck s Spring, Kingston MTs.
1372
Comment
UCR18972
Chenopodium incanum var. occidentale
John C. Roos
1949-6-22
4456
San Bernardino
Eastern Mojave Desert, New York Mtns, Barnwell
1494
Comment
UCR25948
Chenopodium incanum var. occidentale
John C. Roos
1938-4-18
1639
San Bernardino
Mojave Desert, Cronese Lake
305
Comment
RSA158114
Chenopodium leptophyllum
J. C. Roos
1955-7-23
6506
Inyo
Soldier Flat at east base Waucoba Mountain, Inyo Mountains.
2195
Comment
CLARK-A1528-5007
Chenopodium murale
John C. Roos
1937-8-17
2408
Riverside
San Jacinto
Comment
POM263023
Chenopodium pumilio
J. C. Roos
1937-7-14
394
San Bernardino
Santa Ana River near San Bernardino.
Comment
CLARK-A1528-1191
Chenopodium rubrum
John C. Roos
1965-9-18
Inyo
Inyo Mountains
Comment
UCR18970
Chenopodium rubrum
John C. Roos
1965-9-18
s.n.
Inyo
Northern Mojave Desert, Darwin Mesa [=Darwin Plateau]
Comment
CLARK-A1528-5416
Chenopodium rubrum
John C. Roos
1954-8-15
6223
Inyo
Saline Valley
323
Comment
UC1043009
Chenopodium rubrum
John and Lucille Roos
1954-11-23
6258
Inyo
Salt Lake Saline Valley (marsh at sw side)
323
Comment
CLARK-A1528-7840
Chenopodium vulvaria
John C. Roos
1948-9-1
3985
Siskiyou
Fort Jones
Comment
UCR26295
Chimaphila menziesii
John C. Roos
1949-7-2
4534
San Bernardino
San Bernardino Mountains, Snow Canyon [=Rattlesnake Creek], Mill Creek
2134
Comment
UCSB38063
Chorizanthe fimbriata var. fimbriata
Roos, John
1965-6-16
Orange
Dana Point near Doheney Beach.
Comment
CLARK-A1528-3607
Chorizanthe staticoides
John C. Roos
1937-5-21
1804
Orange
Lemon Heights
Comment
CLARK-A1528-3609
Chorizanthe watsonii
John C. Roos
1949-4-30
San Bernardino
Hesperia
Comment
UCR27545
Chorizanthe xanti
John C. Roos
1948-5-8
3827
Riverside
San Bernardino Mtns, Whitewater
579
Comment
CLARK-A1528-2049
Chrysanthemum carinatum
Alfred R. Roos
1956-5-23
Los Angeles
El Segundo
Comment
CLARK-A1528-1764
Chrysanthemum coronarium
John C. Roos
1956-5-5
6578
San Diego
Comment
CLARK-A1528-1765
Chrysanthemum leucanthemum
John C. Roos
1966-6-26
San Bernardino
Loma Linda
Comment
CLARK-A1528-1147
Chrysolepis sempervirens
John C. Roos
1936-7-30
696
San Bernardino
San Bernardino Mountains
2621
Comment
CLARK-A1528-1699
Chrysothamnus albidus
John C. Roos, Lucille Roos
1954-11-23
6259
Inyo
Saline Valley
426
Comment
CLARK-A1528-1702
Chrysothamnus albidus
John C. Roos, Lucille Roos
1954-9-14
6235
Inyo
624
Comment
UCR18814
Chrysothamnus albidus
John C. Roos, L. Roos
1954-9-14
6232
Inyo
Northern Mojave Desert, Amargosa River bottomland, 3 mi. south of Shoshone
433
Comment
UCR19733
Chrysothamnus albidus
John C. Roos, A. R. Roos
1954-8-15
6224
Inyo
Northern Mojave Desert, Lower Warm Spring, Saline Valley
427
Comment
CLARK-A1528-2048
Chrysothamnus albidus
John C. Roos
1953-10-31
6034
Inyo
Amargosa River
441
Comment
RSA92774
Chrysothamnus albidus
J. C. Roos
1954-11-23
6259
Inyo
Lower Warm Spring, Saline Valley.
427
Comment
UCR19473
Chrysothamnus depressus
John C. Roos
1948-9-18
4061
San Bernardino
Eastern Mojave Desert, north slope of Clark Mountain
1829
Comment
CLARK-A1528-1720
Chrysothamnus nauseosus
John C. Roos
1946-9-28
3097
San Bernardino
San Bernardino Mountains
2255
Comment
CLARK-A1528-1721
Chrysothamnus nauseosus
John C. Roos
1950-10-11
5002
San Bernardino
Cajon Pass
975
Comment
CLARK-A1528-5463
Chrysothamnus nauseosus
John C. Roos, Lucille Roos
1950-10-17
5010
San Bernardino
Little Pigeon Pass
320
Comment
UCR23785
Chrysothamnus nauseosus
John C. Roos
1943-10-16
2738
Riverside
Southern Mojave Desert, Falcon Flats, Little San Bernardino Mtns
1524
Comment
POM262878
Chrysothamnus nauseosus subsp. bernardinus
J. C. Roos
1941-8-23
119
San Bernardino
Mill Creek at falls, San Bernardino Mts
Comment
POM262879
Chrysothamnus nauseosus subsp. bernardinus
J. C. Roos
1941-8-23
118
San Bernardino
Mill Creek at falls, San Bernardino Mts
Comment
CLARK-A1528-1018
Chrysothamnus nauseosus subsp. ceruminosus
John C. Roos
1936-11-4
1528
San Bernardino
Victorville
822
Comment
RSA52775
Chrysothamnus nauseosus subsp. hololeucus
J. C. Roos
1950-9-3
4972
San Bernardino
Clark Mtn, south slope.
1890
Comment
UCR23784
Chrysothamnus nauseosus subsp. hololeucus
John C. Roos, L. Roos
1950-10-17
5010
San Bernardino
San Bernardino Valley, Little Pigeon Pass, Barton Road c. 2 mi. west of Loma Linda
320
Comment
RSA45475
Chrysothamnus nauseosus subsp. leiospermus
J. C. Roos
1948-9-18
4060
San Bernardino
N side of Clark Mtn
1829
Comment
POM266287
Chrysothamnus parryi subsp. asper
J. C. Roos
1941-10-18
858
San Bernardino
Head of Rathbone Creek, San Bernardino Mts
2622
Comment
RSA45495
Chrysothamnus parryi subsp. asper
J. C. Roos, L. Roos
1948-9-7
3993
Mono
Crestview.
Comment
CAS-BOT-BC100752
Chrysothamnus viscidiflorus subsp. puberulus
John Roos; Lucille Roos
1951-8-8
5090
Inyo
3 miles NW of Cedar Flat, White Mts.
2590
Comment
UC1234842
Chrysothamnus viscidiflorus subsp. puberulus
J. C. and A. R. Roos
1955-8-24
6542
Inyo
1 mi ne Willow Spring; Last Chance Mts.
1859
Comment
CAS-BOT-BC105966
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos
1961-10-22
s.n.
Inyo
Loretto Road, near Loretto Mine, east side of the Inyo Mtns.
Comment
POM261400
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos
1941-8-17
55
Inyo
Telescope Peak, Panamint Mts
3366
Comment
POM274205
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos
1947-9-19
2794
Inyo
NE ridge of Telescope Peak, Panamint Mt
3140
Comment
RSA155765
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos, A. R. Roos
1955-8-26
6553
Inyo
N shoulder Waucoba Mts, Inyo Mts
3201
Comment
RSA71768
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos
1951-8-8
5113
Inyo
SE rim Reed flat, White Mts
3079
Comment
RSA79618
Chrysothamnus viscidiflorus var. puberulus
J. C. Roos
1953-8-8
5933
Inyo
Blue Bell Mine, Badger Flat, Inyo Mtns.
2683
Comment
UCR18623
Chrysothamnus viscidiflorus var. puberulus
John C. Roos, A. R. Roos
1954-8-14
6218
Inyo
Northern Mojave Desert, Inyo Mountains, 2.5 miles NE of Andrews Mtn.
2378
Comment
RSA45490
Chrysothamnus viscidiflorus var. puberulus
J. C. Roos
1948-9-7
4017
Inyo
10 miles NW of Bishop
Comment
POM265632
Cicer arietinum
J. C. Roos
1937-7-1
2395
Santa Barbara
Solvang
Comment
UCR30574
Cirsium mohavense
John C. Roos
1949-6-28
4528
Inyo
Northern Mojave Desert, Tecopa, Amargosa River Valley
427
Comment
UCR30572
Cirsium scariosum
John C. Roos
1937-7-23
348
San Bernardino
San Bernardino Mountains, Fish Creek, upper Santa Ana River
1982
Comment
CLARK-A1528-1778
Cirsium vulgare
John C. Roos
1965-7-21
San Bernardino
Loma Linda
Comment
UC1234858
Cirsium vulgare
J. C. Roos
1955-8-8
6525
San Bernardino
Loma Linda
320
Comment
RSA85121
Clarkia epilobioides
J. C. Roos
1952-5-7
5618
Riverside
Box Springs Mountains, north of Canyon Crest Heights
488
Comment
RSA44917
Clarkia heterandra
J. C. Roos
1947-6-14
3678
San Bernardino
Shady canyon between Crestline Bowl and San Bernardino Mountains.
Comment
RSA449953
Clarkia purpurea subsp. quadrivulnera
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-A1528-3373
Clarkia unguiculata
John C. Roos
1942-6-6
989
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-1292
Claytonia spathulata var. tenuifolia
John C. Roos
1937-6-5
1474
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3850
Clematis ligusticifolia
John C. Roos
1937-7-31
540
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3851
Clematis ligusticifolia
John C. Roos
1965-10-7
Riverside
Riverside
Comment
POM265656
Cleome lutea
J. C. Roos
1937-8-6
1959
Inyo
Big Pine.
Comment
RSA92729
Cleome lutea
J. C. Roos, L. Roos
1954-6-29
6189
Inyo
The Narrows of Marble Canyon, Inyo Mountains
2210
Comment
RSA104821
Cleome sparsifolia
J. C. Roos
1955-5-13
6358
Inyo
SE end of Eureka Valley.
945
Comment
CLARK-A1528-1168
Cleomella brevipes
John C. Roos, R. Weatherby
1949-9-3
3565
Inyo
Tecopa Hot Springs
426
Comment
CLARK-A1528-2381
Cleomella brevipes
John C. Roos
1954-9-14
6233
Inyo
Amargosa Desert
Comment
RSA592492
Cleomella brevipes
J. C. Roos, Weatherby
1949-9-3
3565
Inyo
Tecopa Hot Springs
427
Comment
RSA92762
Cleomella brevipes
J. C. Roos
1954-9-14
6233
Inyo
Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road
625
Comment
CLARK-A1528-2382
Cleomella obtusifolia
John C. Roos
1937-6-9
2384
San Diego
Anza Borrego Desert State Park
Comment
UCR30862
Cleomella plocasperma
John C. Roos
1947-6-21
3696
San Bernardino
S Mojave Desert, Near Box 'S' Spring, Lucerne Valley
1082
Comment
POM265655
Cleomella plocasperma
J. C. Roos
1937-8-6
1960
Inyo
Big Pine.
Comment
CAS-BOT-BC181000
Cneoridium dumosum
John Roos; Lucille Roos
1954-4-10
6061
San Diego
San Pasqual
152
Comment
CLARK-A1528-1779
Cnicus benedictus
John C. Roos
1937-4-17
1358
Riverside
San Timoteo Canyon
Comment
CLARK-A1528-2203
Coldenia nuttallii
John C. Roos
1937-8-6
1961
Inyo
Big Pine
Comment
UCR19038
Collinsia callosa
John C. Roos
1937-5-31
2032
Los Angeles
San Gabriel Mtns., Below Big Pines
Comment
CLARK-A1528-5172
Collinsia childii
John C. Roos
1953-6-18
5922
San Bernardino
San Bernardino Mountains
1523
Comment
RSA0117408
Collinsia concolor
J. C. Roos
1952-4-13
5530
Riverside
Box Springs Mts.
488
Comment
POM263160
Collomia heterophylla
J. C. Roos
1939-4-29
260
Napa
Blake's Canyon, Howell Mt.
Comment
CLARK-A1528-3910
Colubrina californica
John C. Roos
1949-4-10
4231
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-3911
Colubrina californica
John C. Roos
1967-11-11
Riverside
Chuckwalla Mountains
Comment
RSA45520
Condalia globosa var. pubescens
J. C. Roos
1949-4-8
4184
Imperial
near Midway Well.
Comment
UCR30529
Convolvulus arvensis
John C. Roos
1952-6-4
5736
Riverside
City of Riverside, near Citrus Experiment Station.
Comment
CLARK-A1528-196
Conyza canadensis
John C. Roos
1951-9-17
5212
San Bernardino
Loma Linda
320
Comment
RSA450429
Conyza coulteri
J. C. Roos
1965-10-10
s.n.
San Diego
Otay Lake
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
UCSB37370
Cordylanthus kingii subsp. helleri
Roos, John
1958-8-30
Inyo
Badger Flat, Inyo Mtns.
Comment
CAS-BOT-BC238206
Cordylanthus tecopensis
John C. Roos
1954-7-18
6203
San Bernardino
Saratoga Springs, Mohave [Mojave] Desert
60
Comment
CLARK-A1528-4207
Cordylanthus tecopensis
John C. Roos
1953-11-1
6035
Inyo
Death Valley Junction
624
Comment
CLARK-A1528-4209
Cordylanthus tecopensis
John C. Roos, Alfred R. Roos
1954-7-18
6196
Inyo
Death Valley Junction
624
Comment
CLARK-A1528-5156
Cordylanthus tecopensis
John C. Roos, Lucille Roos
1954-9-14
6231
Inyo
Shoshone
432
Comment
GH365877
Cordylanthus tecopensis
J. C. Roos & L. Roos
1950-8-7
4929
Unknown
Tecopa Hot Springs
426
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
CLARK-A1528-1788
Corethrogyne filaginifolia
John C. Roos
1965-8-19
Riverside
Beaumont
Comment
POM266288
Corethrogyne filaginifolia
J. C. Roos
1937-8-11
2543
Los Angeles
Gorman, Tehachapi Mts.
Comment
POM266289
Corethrogyne filaginifolia var. filaginifolia
J. C. Roos
1942-9-12
1719
Los Angeles
Westwood Village.
Comment
CLARK-A1528-7767
Cornus californica
John C. Roos
1949-7-16
4557
San Bernardino
San Bernardino Mountains
2255
Comment
UCR19726
Coronopus didymus
John C. Roos
1953-4-16
5913
San Bernardino
San Bernardino Valley, Loma Linda
320
Comment
CLARK-A1528-2437
Coronopus didymus
John C. Roos
1957-5-20
6611
Los Angeles
Los Angeles
Comment
CLARK-A1528-5385
Coronopus didymus
John C. Roos
1953-4-16
5913
San Bernardino
San Bernardino Valley
320
Comment
CLARK-A1528-4009
Cowania mexicana var. stansburyana
John C. Roos
1965-7-11
Inyo
Panamint Range
2468
Comment
CLARK-A1528-5524
Crepis capillaris
John C. Roos
1950-4-22
4756
Riverside
Reche Canyon
761
Comment
RSA155646
Crepis intermedia
J. C. Roos
1955-6-17
6401
Inyo
2 miles north of Willow Spring, Last Chance Mountains.
2011
Comment
UC1234848
Crepis intermedia
J. C. Roos
1955-6-17
6401
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment
RSA79551
Crepis intermedia
J. C. Roos
1953-8-11
5998
Inyo
2.5 miles east of Blue Bell Mine, Inyo Mts.
2988
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
UCR19009
Cressa truxillensis
John C. Roos
1949-5-14
4314
San Bernardino
Southern Mojave Desert, 3 mi. west of Lucerne Valley
915
Comment
CLARK-A1528-4992
Crossosoma bigelovii
John C. Roos
1948-4-24
3803
Riverside
Whitewater
609
Comment
UCR25850
Crossosoma bigelovii
John C. Roos
1949-4-2
4127
Riverside
San Bernardino Mtns./Sonoran (Colorado) Desert, Whitewater Canyon
Comment
SEINET9255224
Croton californicus
J. C. Roos
1965-6-23
Riverside
Palm Springs
Comment
UCR23635
Croton setiger
John C. Roos
1946-9-20
3057
San Bernardino
Southern Mojave Desert, between Apple Valley and Lucerne Valley
915
Comment
UCR17542
Crypsis vaginiflora
John C. Roos
1952-6-4
5735
Riverside
San Jacinto River Valley, San Jacinto river bottomland 1.5 mi SE of Perris
427
Comment
SD167194
Cryptantha barbigera var. fergusoniae
J. C. Roos
1948-4-24
3807
Riverside
East San Bernardino Mountains/Sopnoran Desert; Whitewater Wash.
518
Comment
UCR20340
Cryptantha circumscissa
John C. Roos, A. R. Roos
1954-6-11
6126
Inyo
Northern Mojave Desert, Panamint Mountains, Mahogany Flats
2500
Comment
UCR31667
Cryptantha gracilis
John C. Roos
1949-6-19
4397
San Bernardino
Eastern Mojave Desert, SE base of Clark Mountain
1921
Comment
UCR30479
Cryptantha hoffmannii
John C. Roos, A. R. Roos
1953-8-11
6005
Inyo
Northern Mojave Desert, Canyon 3 mi east of Badger Flat, Inyo Mtns.
3110
Comment
CLARK-A1528-2217
Cryptantha intermedia
John C. Roos
1947-3-21
3366
Riverside
Reche Canyon
Comment
RSA659685
Cryptantha intermedia
J. C. Roos
1947-3-21
3366
Riverside
Plateau, Reche Canyon
Comment
CLARK-A1528-2219
Cryptantha jamesii var. abortiva
John C. Roos
1937-7-21
San Bernardino
Lost Creek
1981
Comment
CLARK-A1528-2223
Cryptantha micrantha
John C. Roos
1949-4-11
4239
Riverside
Chuckwalla Mountains
Comment
UCSB46753
Cryptantha micrantha
Roos, John
1965-6-26
San Bernardino
Upper Santa Ana Basin near Fish Creek, San Bernardino Mtns.
Comment
CLARK-A1528-2226
Cryptantha micrantha
John C. Roos
1937-4-7
1344
San Bernardino
Lytle Creek
Comment
RSA450247
Cryptantha micrantha var. lepida
J. C. Roos
1965-6-26
s.n.
San Bernardino
Upper Santa Ana Basin, near Fish Creek. San Bernardino Mtns.
Comment
RSA0038354
Cryptantha micrantha var. lepida
J. C. Roos
1965-7-18
S.N.
San Bernardino
Bear Valley, San Bernardino Mtns.
Comment
UCR25967
Cryptantha muricata
John C. Roos
1948-6-13
3879
San Bernardino
San Gabriel Mtns., Lytle Creek, along roadside
1220
Comment
UCR23583
Cryptantha racemosa
John C. Roos
1955-4-6
6289
Inyo
Northern Mojave Desert, Saline Valley, mouth of Craig Canyon, E base of Inyo Mtns.
534
Comment
GH96078
Cryptantha roosiorum
J. C. Roos & A. R. Roos
1953-8-13
6015
Unknown
Crest of Inyo Mts., 3 mi east of Badger Flat, 10600 ft
Comment
CLARK-A1528-2237
Cryptantha utahensis
John C. Roos
1947-4-18
3474
Inyo
Death Valley National Park
1737
Comment
CLARK-A1528-2239
Cryptantha virginensis
John C. Roos
1954-6-12
6137
Inyo
Panamint Mountains
Comment
CLARK-A1528-3574
Cryptogramma crispa subsp. acrostichoides
John C. Roos
1946-9-15
3040
San Bernardino
San Bernardino Mountains
3002
Comment
UCR25935
Cucurbita palmata
John C. Roos
1951-9-29
5304
San Bernardino
San Bernardino Valley, Loma Linda
335
Comment
CAS-BOT-BC130883
Cuniculotinus gramineus
J. C. Roos; A. R. Roos
1953-8-9
5945
Inyo
Tamarack Canyon, Inyo Mts.
2743
Comment
UCR23367
Cupressus macnabiana
John C. Roos
1938-11-19
323
Napa
North Coast Range, Pope Valley, Aetna Springs
305
Comment
CLARK-A1528-2662
Cupressus stephensonii
John C. Roos
1962-5-19
Riverside
Loma Linda
Comment
POM264466
Cuscuta californica
J. C. Roos
1937-9-2
644
Los Angeles
Manhattan Beach.
Comment
UCR18959
Cuscuta indecora
John C. Roos
1965-9-18
s.n.
Inyo
Eastern Sierra Nevada Mtns/Owens Valley, Big Pine
Comment
RSA155756
Cuscuta indecora
J. C. Roos, A. R. Roos
1955-8-28
6563
Inyo
On the West side of Owens Lake, 3 miles North of Olancha
1091
Comment
SD52914
Cuscuta indecora var. indecora
J. C. Roos, A. R. Roos
1955-8-28
6563
Inyo
West side Owens Lake 3 miles north of Olancha
1091
Comment
CLARK-A1528-2578
Cycloloma atriplicifolium
John C. Roos
1951-9-25
5300
Riverside
Santa Ana River
259
Comment
POM265706
Cycloloma atriplicifolium
J. C. Roos
1937-6-16
1230
San Diego
San Pasqual Valley.
Comment
UCR24273
Cycloloma atriplicifolium
John C. Roos
1937-9-29
s.n.
Los Angeles
San Gabriel Valley, near the San Gabriel River, in El Monte
91
Comment
CLARK-A1528-2577
Cycloloma atriplicifolium
John C. Roos
1937-9-29
Los Angeles
El Monte
Comment
RSA662434
Cycloloma atriplicifolium
J. C. Roos
1965-9-26
s.n.
Riverside
In Indio.
Comment
LA210531
Cymopterus aboriginum
John C. Roos; Lucille Roos
1954-5-8
6100
Inyo
crest of Grapevine Mts, above Leadfield
1584
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-A1528-4576
Cynodon dactylon
John C. Roos
1942-9-5
1717
Los Angeles
Los Angeles
Comment
CLARK-A1528-51
Cynodon dactylon
John C. Roos
1951-10-2
5311
San Bernardino
Loma Linda
320
Comment
UCR23578
Cynoglossum occidentale
John C. Roos
1942-7-1
1253
Mariposa
Sierra Nevada Mtns, Yosemite National Park, south slope of Cloud's Rest
2591
Comment
CLARK-A1528-1490
Cystopteris fragilis
John C. Roos, Lucille Roos
1952-7-30
5871
Mono
White Mountains
3047
Comment
CLARK-A1528-2764
Dalea arborescens
John C. Roos
1947-4-18
3444
San Bernardino
Barstow
Comment
CLARK-A1528-2777
Dalea californica
John C. Roos
1942-5-1
1150
Riverside
Dry Morongo Canyon
Comment
UC1042986
Dalea searlsiae
John and Lucille Roos
1954-6-28
6167
Inyo
3 mi. n.e. Andrews Mt.; Inyo Mts.
2316
Comment
SEINET3407734
Dalea spinosa
J. C. Roos
1959-6-11
Imperial
Coyote Wells.
Comment
LA102190
Danthonia californica
John C. Roos;
1965-8-1
sn
Siskiyou
Marble Mountains, Middle Sky High Lake
Comment
UCR23607
Datisca glomerata
John C. Roos
1937-5-29
826
San Bernardino
San Bernardino Mtns, Deep Creek
Comment
RSA0060579
Datura meteloides
John C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda.
305
Comment
UCSB49867
Deinandra arida
Roos, John
1969-5-10
Kern
Red Rock Canyon
Comment
CLARK-A1528-3862
Delphinium parishii subsp. parishii
John C. Roos
1948-4-24
3791
Riverside
Cabazon
Comment
RSA0029713
Delphinium polycladon
J. C. Roos
1937-8-8
1023
Inyo
Lone Pine Canyon
2591
Comment
UCR25459
Deschampsia danthonioides
John C. Roos
1967-5-29
s.n.
San Bernardino
San Bernardino Mtns., Summit Valley
976
Comment
UCSB45572
Deschampsia danthonioides
Roos, John
1967-5-29
San Bernardino
Summit Valley
Comment
RSA85463
Deschampsia danthonioides var. gracilis
J. C. Roos
1952-4-16
5543
Riverside
Edgemont, near Box Springs.
488
Comment
CLARK-A1528-2308
Descurainia richardsonii subsp. incisa
John C. Roos
1947-8-9
3737
San Bernardino
San Bernardino Mountains
2285
Comment
UCR18761
Descurainia sophia
John C. Roos
1966-3-27
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
396
Comment
RSA662432
Descurainia sophia
A. R. Roos
1954-3-4
s.n.
Los Angeles
5001 Gaviota, Encino.
Comment
CLARK-A1528-1796
Dicoria canescens
John C. Roos
1957-11-30
6659
Riverside
Coachella Valley
152
Comment
UCR23771
Dicoria canescens subsp. clarkiae
John C. Roos
1955-5-13
6359
Inyo
Northern Mojave Desert, SE end of Eureka Valley
945
Comment
UCR23772
Dicoria canescens subsp. clarkiae
John C. Roos, L. Roos
1954-11-24
6266
Inyo
Northern Mojave Desert, SE end of Eureka Valley
930
Comment
CLARK-A1528-1067
Dicoria canescens subsp. clarkiae
John C. Roos, Lucille Roos
1954-11-24
6266
Inyo
Eureka Valley
929
Comment
CLARK-A1528-5323
Dicoria canescens subsp. clarkiae
John C. Roos, Lucille Roos
1954-11-24
6266
Inyo
Eureka Valley
929
Comment
CLARK-A1528-5470
Dicoria canescens subsp. clarkiae
John C. Roos, Lucille Roos
1954-11-24
6266
Inyo
Eureka Valley
929
Comment
CLARK-A1528-5471
Dicoria canescens subsp. clarkiae
John C. Roos, Lucille Roos
1954-11-24
6266
Inyo
Eureka Valley
929
Comment
CLARK-A1528-5472
Dicoria canescens subsp. clarkiae
John C. Roos, Philip A. Munz
1954-9-18
20157
Inyo
Eureka Valley
929
Comment
RSA662415
Dicoria canescens subsp. clarkiae
J. C. Roos, L. Roos
1954-11-24
3050
Inyo
SE end of Eureka Valley.
930
Comment
CAS-BOT-BC299844
Dieteria canescens var. canescens
John Roos; Lucille Roos
1951-8-11
5182
Mono
Big Prospector Meadow, Whtie Mts.
3200
Comment
CLARK-A1528-4583
Digitaria ischaemum
John C. Roos
1952-9-25
5898
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-4586
Digitaria ischaemum
John C. Roos
1949-10-19
4692
Los Angeles
San Gabriel
121
Comment
UCR20451
Digitaria ischaemum
John C. Roos
1952-9-25
5898
San Bernardino
San Bernardino Valley, Loma Linda
Comment
RSA78220
Digitaria ischaemum
J. C. Roos
1952-9-25
5898
San Bernardino
Loma Linda, San Bernardino Valley.
320
Comment
OBI30463
Diplacus bigelovii
J. C. Roos
1967-8-6
s.n.
Inyo
Mazourka Cyn, Inyo Mts
Comment
UCR30861
Dipsacus sativus
John C. Roos
1948-8-29
3962
Sonoma
North Coast Ranges, Healdsburg
Comment
UCR25707
Dodecatheon clevelandii
John C. Roos
1941-1-18
223
Riverside
Plateau in Reche Canyon
610
Comment
CLARK-A1528-2418
Draba breweri
John C. Roos
1937-8-8
2199
Inyo
Sierra Nevada
Comment
POM262874
Draba cuneifolia var. integrifolia
J. C. Roos
1941-3-15
216
San Bernardino
Hills near Loma Linda
Comment
CLARK-A1528-2316
Draba douglasii var. crockeri
John C. Roos
1951-8-10
5151
Mono
White Mountains
4023
Comment
UCR25977
Draba oligosperma
John C. Roos
1960-7-4
s.n.
Mono
White Mtns, 'Crooked Creek' [but probably actually from White Mtn. Peak, and now mapped along the trail below the peak]
4345
Comment
POM263488
Draba verna
J. C. Roos
1939-2-21
299
Napa
Near Angwin, Napa Range.
Comment
CLARK-A1528-1491
Dryopteris arguta
John C. Roos
1937-3-27
1326
Santa Barbara
Los Olivos
Comment
RSA85439
Dryopteris arguta
J. C. Roos
1952-4-13
5519
Riverside
Box Springs Mts.
518
Comment
CLARK-A1528-5665
Dudleya cymosa
John C. Roos
1937-6-5
1494
San Bernardino
San Bernardino Mountains
Comment
POM265682
Dudleya edulis
J. C. Roos
1937-6-13
2234
San Diego
Imperial Beach.
Comment
POM265726
Dudleya lanceolata
J. C. Roos
1937-6-29
1788
Los Angeles
Malibu Beach.
Comment
UCSB42175
Dudleya lanceolata
Roos, John
1965-6-16
Orange
Dana Point
Comment
CLARK-A1528-5664
Dudleya pulverulenta
John C. Roos
1937-6-14
1495
San Diego
Lemon Grove
Comment
CLARK-A1528-2624
Dudleya saxosa
John C. Roos
1937-5-29
1790
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4867
Dudleya saxosa subsp. aloides
John C. Roos
1937-6-14
1787
San Diego
Descanso Junction
Comment
UCD98830
Dysphania pumilio
A. R. Roos
1937-7-14
s.n.
San Bernardino
Santa Ana River, near Waterman Avenue.
Comment
RSA662541
Dyssodia papposa
J. C. Roos, L. Roos
1952-05
5056 -a
San Bernardino
Loma Linda, corner of Central & Anderson.
335
Comment
UCR18667
Dyssodia pentachaeta var. belenidium
John C. Roos
1948-9-19
4032
San Bernardino
Eastern Mojave Desert, N side of Clark Mountain along the powerline road
1067
Comment
CLARK-A1528-54
Echinochloa colona
John C. Roos
1965-9-14
5202
San Bernardino
Loma Linda
323
Comment
UCR23985
Echinochloa colona
John C. Roos
1965-7-4
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
306
Comment
CLARK-A1528-4598
Echinochloa crus-galli
John C. Roos
1965-7-4
San Bernardino
Loma Linda
304
Comment
UCR23984
Echinochloa crus-galli
John C. Roos
1965-7-4
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
306
Comment
CAS-BOT-BC445611
Echinodorus berteroi
J. C. Roos
1965-10-10
s.n.
San Diego
Edge of Otay Lake.
Comment
CLARK-A1528-1485
Echinodorus berteroi
John C. Roos
1965-10-10
San Diego
Otay Lake
Comment
UCR24199
Echinodorus berteroi
John C. Roos
1965-10-10
s.n.
San Diego
Bank of Otay Lake
150
Comment
CLARK-A1528-202
Eclipta alba
John C. Roos
1951-9-22
5233
Riverside
Riverside
243
Comment
POM265811
Elatine californica
J. C. Roos
1937-7-27
1673
San Bernardino
Boulder Bay, Bear Lake, San Bernardino Mts.
Comment
UCR25249
Elatine gracilis
John C. Roos
1965-7-17
s.n.
San Bernardino
San Bernardino Mountains, Dry Lake
2744
Comment
UCR24046
Eleusine indica
John C. Roos
1942-10-1
1735
Los Angeles
Los Angeles, North Boyle and Bridge Street
Comment
CLARK-A1528-4602
Elymus cinereus
John C. Roos, Lucille Roos
1951-8-12
5185
Inyo
White Mountains
3108
Comment
LA102170
Elymus condensatus
John C. Roos;
1963-8-10
sn
Riverside
Blythe
Comment Read comments Mar 10 2014
UCR23323
Elymus condensatus
John C. Roos
1952-5-16
5671
San Bernardino
San Bernardino Valley, 1 mi west of Colton
320
Comment
CAS-BOT-BC227764
Elymus elymoides
J. C. Roos
1965-7-17
s.n.
San Bernardino
Barton Flats, San Bernardino Mtns.
Comment
CAS-BOT-BC227765
Elymus elymoides
J. C. Roos
1965-6-16
s.n.
San Bernardino
North slope of Cajon Pass
Comment
RSA71788
Elymus elymoides
J. C. Roos, L. Roos
1951-8-8
5094
Inyo
Head of Wyman Canyon, White Mountains.
3171
Comment
UCR20624
Elymus elymoides
John C. Roos
1947-7-13
2889
Inyo
Northern Mojave /Great Basin Desert, Panamint Mtns, Arcane Meadows, between Baldy [=Rogers?] and Telescope Peaks
3018
Comment
POM265756
Elymus multisetus
J. C. Roos
1937-5-28
2048
San Bernardino
By roadside; Horsethief Canyon, Off Cajon Pass.
Comment
RSA40582
Elymus multisetus
J. C. Roos
1947-7-13
2889
Inyo
Near Arcane Meadows, Panamint Mountains.
3018
Comment
UCR23883
Elymus salinus
John C. Roos
1949-5-29
3539
San Bernardino
Eastern Mojave Desert, Coloseum Mine, Clark Mountain
1707
Comment
UCR23868
Elymus trachycaulus
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
UCR23986
Elymus triticoides
John C. Roos
1965-6-16
s.n.
San Bernardino
Mojave Desert, Victorville
915
Comment
UCR26134
Encelia actoni
John C. Roos
1947-3-15
3342
Riverside
San Jacinto Valley, Valle Vista, east of Hemet
549
Comment
CLARK-A1528-1807
Encelia californica
John C. Roos
1946-10-12
3130
Los Angeles
Los Angeles
Comment
CLARK-A1528-1809
Encelia farinosa
John C. Roos
1952-4-9
5509
Riverside
Riverside
335
Comment
UCR24089
Endolepis covillei
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment
POM265715
Endolepis covillei
J. C. Roos
1937-8-3
2161
Inyo
Little Lake, Owens Valley.
Comment
RSA92071
Endolepis covillei
J. C. Roos, L. Roos
1954-5-6
6074
Inyo
Amargosa river bottom 4 mile north of Shoshone.
518
Comment
UC1023389
Enneapogon desvauxii
J. C. Roos
1950-9-3
4970
San Bernardino
s side Clark Mt.; Mojave Desert
1828
Comment
POM263255
Ephedra californica
J. C. Roos
1937-3-26
530
San Luis Obispo
Near Summit of Cuyama Valley
Comment
CLARK-A1528-2676
Ephedra viridis
John C. Roos
1937-4-26
2115
San Bernardino
Providence Mountains
Comment
RSA0108147
Ephedra viridis
J. C. Roos
1937-6-10
525
San Diego
Mountain Spring
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
CLARK-A1528-3296
Epilobium brevistylum
John C. Roos
1943-7-31
2693
San Bernardino
San Bernardino Mountains
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
RSA47542
Epilobium hornemannii subsp. hornemannii
J. C. Roos
1949-7-4
4539
San Bernardino
High Creek.
2744
Comment
UCR26294
Epilobium lactiflorum
John C. Roos
1949-7-4
4539
San Bernardino
San Bernardino Mtns., High Creek, just west of San Gorgonio
2744
Comment
UCSB42120
Epilobium oregonense
Roos, John
1965-7-31
San Bernardino
South Fork of the Santa Ana River, San Bernardino Mtns
2286
Comment
UCSB42150
Epilobium torreyi
Roos, John
1965-9-15
San Bernardino
Victorville
Comment
CLARK-A1528-7851
Epipactis gigantea
John C. Roos
1948-5-15
3838
Riverside
Eagle Mountains
Comment
UCR19156
Epipactis gigantea
John C. Roos
1948-5-15
3838
Riverside
Sonoran (Colorado) Desert, Eagle Mtns., Lost Palms Canyon
Comment
SD132541
Equisetum telmateia subsp. braunii
John C. Roos
1952-6-25
5794
Riverside
Riverside, Fairmount Park, west end
259
Comment
CAS-BOT-BC204486
Eragrostis cilianensis
J. C. Roos
1965-7-7
s.n.
Riverside
San Jacinto
Comment
UC1023424
Eragrostis cilianensis
John C. Roos
1950-9-1
4961
San Bernardino
vicinity Coliseum Mine (e Mohave Desert); Mohave Desert, Clark Mts.
1645
Comment
UCR19368
Eragrostis cilianensis
John C. Roos
1951-9-17
5213
San Bernardino
San Bernardino Valley, Loma Linda
320
Comment
UCSB51375
Eragrostis cilianensis
Roos, John
1937-11-12
San Bernardino
Loma Linda
Comment
RSA450449
Eragrostis cilianensis
J. C. Roos
1965-7-7
s.n.
Riverside
San Jacinto.
Comment
RSA659627
Eragrostis cilianensis
J. C. Roos
1937-11-12
s.n.
San Bernardino
Loam Linda.
305
Comment
RSA86877
Eragrostis cilianensis
J. C. Roos
1950-9-1
4961
San Bernardino
Vicinity of Coliseum Mine, Clark Mountains
1646
Comment
UCSB51397
Eragrostis curvula
Roos, John
1965-10-10
San Diego
Hwy. 395; 0.1 miles south of the San Diego/Riverside county line
Comment
RSA659624
Eragrostis curvula
J. C. Roos
1965-10-10
s.n.
San Diego
On the dry roadside of hwy 395, 0.1 miles south of the San Diego/Riverside county line.
Comment
CAS-BOT-BC213599
Eragrostis mexicana subsp. mexicana
J. C. Roos
1965-7-7
s.n.
Riverside
San Jacinto
Comment
CAS-BOT-BC213601
Eragrostis mexicana subsp. mexicana
J. C. Roos
1951-9-19
5221
San Bernardino
Irrigated orchard on West Barton Ave. in Loma Linda, at intersection with San Bernardino St.
335
Comment
IRVC26150
Eragrostis mexicana subsp. mexicana
J. C. Roos
1952-5-14
5659
Riverside
Riverside, corner of Iowa Avenue and 8th Street southern coastal
305
Comment
RSA450464
Eragrostis mexicana subsp. virescens
J. C. Roos
1965-7-7
s.n.
Riverside
San Jacinto. On the edge of alfalfa field.
Comment
UCR20585
Eragrostis mexicana subsp. virescens
John C. Roos
1954-5-16
6121
San Bernardino
San Bernardino Valley, Loma Linda
335
Comment
UCR23990
Eragrostis mexicana subsp. virescens
John C. Roos
1965-7-7
s.n.
Riverside
San Jacinto
Comment
UCR24026
Eragrostis mexicana subsp. virescens
John C. Roos
1938-8-19
2760
San Bernardino
San Bernardino Valley, Loma Linda
305
Comment
UCR24553
Eragrostis mexicana subsp. virescens
Alfred R. Roos
1937-8-4
10878
Inyo
Lone Pine
Comment
UCR32868
Eragrostis mexicana subsp. virescens
John C. Roos
1951-9-19
5220
San Bernardino
San Bernardino Valley, Irrigated orchard on West Barton Ave. in Loma Linda
335
Comment
OBI45203
Eragrostis pectinacea
John C. Roos
1940-9-14
231 a
San Bernardino
San Bernardino Valley, S of Bryn Mawr
Comment
CAS-BOT-BC284148
Eragrostis pectinacea var. pectinacea
J. C. Roos
1965-7-5
s.n.
San Bernardino
Loma Linda
304
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
CLARK-A1528-3220
Eremalche exilis
John C. Roos
1965-6-16
San Bernardino
Adelanto
Comment
CLARK-A1528-3221
Eremalche exilis
John C. Roos
1949-3-19
4115
Riverside
Indio
Comment
CLARK-A1528-2642
Eremocarpus setiger
John C. Roos
1965-7-27
Riverside
Elsinore
Comment
RSA0057702
Eremogone congesta var. subcongesta
J. C. Roos
1947-7-11
2844
Inyo
Mahogany Flats, Panamint Mts.
2499
Comment
UC1234852
Eremothera boothii subsp. intermedia
J. C. Roos
1955-6-17
6396
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment Read comments Nov 4 2011
CLARK-A1528-3489
Eriastrum densifolium subsp. austromontanum
John C. Roos
1943-5-23
2660
Riverside
Little San Bernardino Mountains
Comment
CLARK-A1528-3804
Eriastrum densifolium subsp. mohavense
John C. Roos
1943-5-23
2661
Riverside
Little San Bernardino Mountains
Comment
CLARK-A1528-3493
Eriastrum eremicum
John C. Roos
1965-6-16
San Bernardino
Mojave Desert
Comment
CLARK-A1528-5116
Eriastrum eremicum
John C. Roos, Lucille Roos
1947-7-15
2825
Inyo
Darwin Mesa
1523
Comment
HSC78526
Eriastrum eremicum
J. C. Roos
1965-6-16
San Bernardino
4 mi. N of Adelanto, Mojave Desert
Comment
RSA0120060
Eriastrum eremicum subsp. eremicum
J. C. Roos
1947-7-15
2825
Inyo
Darwin Mesa.
Comment
RSA0120388
Eriastrum eremicum subsp. eremicum
J. C. Roos
s.n.
San Bernardino
4 miles north of Adelanto, Mojave Desert.
Comment
CLARK-A1528-5750
Eriastrum sapphirinum subsp. dasyanthum
John C. Roos
1937-6-11
651
San Diego
Barrett
Comment
UCR19151
Eriastrum sapphirinum subsp. dasyanthum
John C. Roos
1952-5-26
5723
Riverside
Haas' ranch, Reche Canyon
457
Comment
RSA0123322
Eriastrum sapphirinum subsp. sapphirinum
J. C. Roos
1936-8-15
575
San Bernardino
Barton Flats.
Comment
RSA0124788
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
RSA0124789
Eriastrum wilcoxii
J. C. Roos, L. Roos
1954-6-25
6152
Inyo
Inyo Mountains: East side Badger Flat.
2652
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
CAS-BOT-BC131496
Ericameria albida
John Roos; Lucille Roos
1954-9-14
6235
Inyo
Amargosa Desert 2.5 miles NE of Death Valley Junction along Ash Meadows road
624
Comment
GH387225
Ericameria albida
J. C. Roos & L. Roos
1954-11-23
6260
Unknown
1.4 miles south of Lower Warm Spring, Saline Valley
381
Comment
UC1010277
Ericameria albida
John and Lucille Roos
1953-10-31
6034
Inyo
3 mi s of Shoshone (Amargosa River bed); Amargosa River
441
Comment
UC1043012
Ericameria albida
John and Lucille Roos
1954-11-23
6260
Inyo
1.4 mi s of Lower Warm Springs; Saline Valley
381
Comment
UCSB37810
Ericameria albida
Roos, John; Roos, Alfred
1954-7-15
Inyo
Lower Warm Spring, Saline Valley
Comment
UCSB45939
Ericameria arborescens
Roos, John
1965-10-2
San Bernardino
Camp Angelus; San Bernardino Mtns.
Comment
UCR23332
Ericameria cuneata
John C. Roos
1949-8-13
4609
San Bernardino
Eastern Mojave Desert, Copper Queen Mine, Keystone Canyon, New York Mtns
1829
Comment
UCR26087
Ericameria cuneata
John C. Roos
1948-9-25
4076
San Bernardino
San Bernardino Mtns, Arrowhead Highlands
1524
Comment
RSA45540
Ericameria cuneata var. spathulata
J. C. Roos, L. Roos
1948-9-25
4076
San Bernardino
Arrowhead Highlands
1524
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
UCR19532
Ericameria discoidea
John C. Roos
1958-8-31
s.n.
Inyo
Northern Mojave Desert, 3 mi. east of Badger Flats, Inyo Mtns
3232
Comment
RSA44909
Ericameria gilmanii
J. C. Roos
1947-9-19
2798
Inyo
Panamint Mountains; Ridge SE of Telescope Peak.
3354
Comment
UC1494271
Ericameria gilmanii
J. C. Roos
1947-9-19
2798
Inyo
rocky ridge se Telescope Peak; Panamint Mtns.
3352
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-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
CAS-BOT-BC292385
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
GH417203
Ericameria nana
J. C. Roos & A. R. Roos
1955-8-24
6538
Unknown
Summit ridge of Last Chance Mts., 3.5 miles south of Willow Spring
2438
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
POM266282
Ericameria parishii
J. C. Roos
1942-11-14
2582
San Bernardino
Cedar Springs, N base of San Bernardino Mts.
1037
Comment
CAS-BOT-BC174359
Ericameria parishii var. parishii
J. C. Roos
1965-10-2
s.n.
San Bernardino
Camp Angelus, San Bernardino Mtns.
Comment
UCR18578
Ericameria parryi var. aspera
John C. Roos
1956-9-29
6601
Inyo
Northern Mojave Desert, Panamint Mountains, Arcane Meadow
3018
Comment
UCR23782
Ericameria parryi var. aspera
John C. Roos, Alfred R. Roos
1955-8-26
6551
Inyo
Inyo Mountains, [Inyo National Forest], main ridge between Squaw Peak and Waucoba Mountain
2957
Comment
POM266284
Ericameria pinifolia
J. C. Roos
1942-10-10
1723
Los Angeles
Westwood Village NW of Los Angeles County
Comment
CAS-BOT-BC293320
Ericameria teretifolia
John Roos; Lucille Roos
1947-9-20
2811
Inyo
Wild Rose [Wildrose] Canyon, Panamint Mts.
1524
Comment
CLARK-A1528-1813
Erigeron aphanactis
John C. Roos
1949-5-28
4332
San Bernardino
Clark Mountains
Comment
UCR23766
Erigeron aphanactis
John C. Roos
1955-5-15
6380
Inyo
Northeastern Mojave Desert, Willow Creek, Last Chance Mtns
1585
Comment
RSA92166
Erigeron aphanactis var. aphanactis
J. C. Roos, L. Roos
1954-6-28
6170
Inyo
Loretto Road, above Loretto Mine.
1646
Comment
RSA71711
Erigeron argentatus
J. C. Roos
1952-7-25
5817
Inyo
Between Westgaard Pass and Reed Flat, White Mtns.
2439
Comment
CLARK-A1528-1816
Erigeron breweri
John C. Roos
1965-6-26
San Bernardino
San Bernardino Mountains
Comment
RSA47464
Erigeron breweri var. bisanctus
J. C. Roos
1949-7-16
4560
San Bernardino
Moonridge, Bear Valley, San Bernardino Mts.
2256
Comment
RSA47465
Erigeron breweri var. covillei
J. C. Roos, L. Roos
1949-6-23
4467
San Bernardino
Near Rock Springs, Mid-hills, New York Mountains.
1463
Comment
UCR30560
Erigeron breweri var. porphyreticus
John C. Roos
1947-6-21
3691
San Bernardino
San Bernardino Mtns, Fawnskin, Bear Valley
Comment
UCR26158
Erigeron clokeyi
John C. Roos
1947-7-11
2905
Inyo
Northern Mojave Desert, Panamint Mtns, Mahogany Flats
2470
Comment
CLARK-A1528-2169
Erigeron linifolius
John C. Roos
1940-9-18
229 a
San Bernardino
Loma Linda
Comment
CLARK-A1528-1827
Erigeron lonchophyllus
John C. Roos
1966-8-6
San Bernardino
San Bernardino Mountains
2438
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
CLARK-A1528-5339
Erigeron strigosus
John C. Roos
1957-7-10
6654
San Bernardino
Loma Linda
Comment
RSA662545
Erigeron strigosus
J. C. Roos
1957-7-10
6654
San Bernardino
Loma Linda.
Comment
CLARK-A1528-4620
Eriochloa acuminata
John C. Roos
1939-9-16
San Bernardino
Highland
Comment
CLARK-A1528-4621
Eriochloa acuminata
John C. Roos
1950-9-9
4985
San Bernardino
San Bernardino Valley
365
Comment
CLARK-A1528-4622
Eriochloa acuminata
John C. Roos
1937-11-28
Riverside
Riverside
Comment
POM251759
Eriochloa acuminata
A. R. Roos
1937-11-22
7
Riverside
East washington Ave., Riverside.
Comment
POM263192
Eriochloa acuminata
J. C. Roos
1937-9-5
438
San Bernardino
Patton, San Bernadino Valley.
Comment
LA102172
Eriochloa acuminata var. acuminata
Alfred R. Roos;
1937-11-28
sn
Riverside
E Washington St
Comment
UC1023431
Eriochloa acuminata var. acuminata
John C. Roos
1950-9-9
4985
San Bernardino
San Bernardino Valley, Loma Linda, San Bernardino St. and Barton Ave. San Bernardino Valley; , Loma Linda
365
Comment Read comments Jan 28 2015
UCD65680
Eriochloa aristata
J. C. Roos
1965-9-26
Riverside
In Indio.
Comment
LA105134
Eriochloa aristata var. aristata
John C. Roos;
1985-12-22
5962
Riverside
Deep Canyon, Coachella Valley, 0.25 NW of Valerie Jean, W of Hwy 86, SE 0.25
-30
Comment Read comments Mar 23 2014
UCR26265
Eriochloa contracta
John C. Roos
1963-8-10
s.n.
Riverside
Sonoran (Colorado) Desert, Colorado River Valley, Blythe
82
Comment
GH355965
Eriochloa gracilis
J. C. Roos
1950-8-22
4945
Unknown
Highland, San Bernadino Valley
Comment
RSA0036055
Eriochloa gracilis
A. R. Roos
1937-11-25
s.n.
San Bernardino
Highland
Comment
RSA450469
Eriodictyon crassifolium
J. C. Roos
1965-6-13
s.n.
Riverside
Palms to Pines Hwy., San Jacinto Mtns.
Comment
CLARK-A1528-2972
Eriodictyon trichocalyx
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3613
Eriogonum angulosum
John C. Roos
1937-4-25
2099
San Bernardino
Essex
Comment
CLARK-A1528-3616
Eriogonum angulosum
John C. Roos
1937-4-23
1824
Riverside
Twentynine Palms
Comment
POM265721
Eriogonum angulosum
J. C. Roos
1937-8-10
1813
Kern
Bodfish.
Comment
UCR25337
Eriogonum baileyi var. baileyi
John C. Roos
1965-10-17
s.n.
San Bernardino
Mojave Desert, Desert flat at Phelan Rd., south of Victorville
Comment
CAS-BOT-BC254163
Eriogonum baileyi var. baileyi
J. C. Roos; A. R. Roos
1954-8-15
6228
Inyo
Whipoorwill (or Soldier) Flat at east side of Waucoba Mtn., Inyo Mts.
2194
Comment
RSA155701
Eriogonum baileyi var. baileyi
J. C. Roos, E. C. Jaeger
1955-7-21
6496
Inyo
Willow Spring, Last Chance Mountains.
1829
Comment
SD52994
Eriogonum brachyanthum
John C. Roos
1955-7-24
6523
Inyo
Nelson Range near head of Grapevine Canyon
1890
Comment
CLARK-A1528-3643
Eriogonum brachypodum
John C. Roos
1955-7-23
6507
Inyo
Inyo Mountains
2194
Comment
CAS-BOT-BC241850
Eriogonum caespitosum
John Roos; Lucille Roos
1952-7-27
5827
Inyo
West rim Reed Flat, White Mts.
3108
Comment
RSA158112
Eriogonum cernuum
J. C. Roos
1955-7-23
6507
Inyo
Soldier Flat at east base Waucoba Mountain, Inyo Mountains.
2195
Comment
POM265634
Eriogonum cinereum
J. C. Roos
1942-9-26
1727
Los Angeles
Sea bluffs, Santa Monica.
Comment
RSA449974
Eriogonum crocatum
J. C. Roos
1958-5-22
s.n.
Ventura
Conejo grade summit on N. base of Santa Monica Mtns.
Comment Read comments Jan 16 2016
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
UCSB42255
Eriogonum crocatum
Roos, John
1958-5-22
Ventura
Conejo Grade summit on N. base of Santa Monica Mtns.
Comment
POM263091
Eriogonum davidsonii
J. C. Roos
1937-7-16
389
San Bernardino
San Gabriel Mountains: near Stockton Flats.
Comment
UCR25384
Eriogonum deflexum
John C. Roos
1937-8-25
2026
San Bernardino
Eastern Mojave Desert, Windmill Station
1128
Comment
SD52921
Eriogonum deflexum var. baratum
John C. Roos
1955-7-24
6519
Inyo
Nelson Range near head of Grapevine Canyon
1890
Comment
CAS-BOT-BC256114
Eriogonum deflexum var. deflexum
John Roos; Lucille Roos
1952-6-28
6172
Inyo
North base of sand dunes at SE end Eureka Valley
914
Comment
RSA450254
Eriogonum elongatum
J. C. Roos
1965-10-20
s.n.
San Bernardino
The east fork of Mountain Home Canyon.
Comment
CLARK-A1528-997
Eriogonum fasciculatum subsp. polifolium
John C. Roos
1948-5-15
3844
Riverside
Eagle Mountains
853
Comment
RSA0060581
Eriogonum gracile
John C. Roos
1952-8-27
5888
Riverside
Pigeon Pass, Box Springs Mts.
457
Comment
RSA393252
Eriogonum gracile var. gracile
A. R. Roos
1922-11-12
s.n.
San Bernardino
S of Loma Linda.
Comment
CAS-BOT-BC251138
Eriogonum gracilipes
John Roos; Lucille Roos
1951-8-8
5104
Mono
Big Prospector Meadow at head of Crooked Creek, White Mts.
3200
Comment
CLARK-A1528-4741
Eriogonum heermannii
John C. Roos, Lucille Roos
1954-6-28
6171
Inyo
Inyo Mountains
1615
Comment
CLARK-A1528-3653
Eriogonum heermannii subsp. argense
John C. Roos, Lucille Roos
1951-8-12
5191
Inyo
White Mountains
2194
Comment
RSA155715
Eriogonum heermannii var. argense
J. C. Roos, A. R. Roos
1955-8-24
6537
Inyo
Ridge 2 miles south of Willow Spring, Last Chance Mts.
2287
Comment
UC1234836
Eriogonum heermannii var. argense
J. C. and A. R. Roos
1955-8-24
6537
Inyo
ridge 2 mi s Willow Spring; Last Chance Mts.
2286
Comment
UCR24263
Eriogonum heermannii var. argense
John C. Roos
1946-9-21
3078
San Bernardino
San Bernardino Mtns., Cushenbury Spring
1280
Comment
RSA155751
Eriogonum kearneyi subsp. monoense
J. C. Roos
1955-7-20
6476
Inyo
0.1 mile NW of boundary marker # 80, Last Chance Mountains 2 miles east of Willow Spring.
2073
Comment
CLARK-A1528-3666
Eriogonum maculatum
John C. Roos
1958-9-28
Riverside
San Jacinto Mountains
Comment
UCR24211
Eriogonum mensicola
John C. Roos
1955-7-24
6521
Inyo
Northern Mojave Desert, Nelson Range near head of Grapevine Canyon
1890
Comment
RSA155706
Eriogonum microtheca var. foliosum
J. C. Roos
1955-7-21
6491
Inyo
Last Chance Mountains 1miles south of Willow Spring
2073
Comment
RSA79552
Eriogonum microtheca var. lapidicola
J. C. Roos
1953-8-11
5985
Inyo
East of Badger Flat
2866
Comment
CLARK-A1528-3670
Eriogonum microthecum
John C. Roos
1949-9-2
4646
San Bernardino
Comment
NY282224
Eriogonum microthecum var. lapidicola
J. C. Roos
1953-8-7
5931
Inyo
Badger Flat near Blue Bell Mine, Inyo Mts.
2682.2
Comment
SD125900
Eriogonum microthecum var. lapidicola
J. C. Roos
1967-8-6
Inyo
Inyo Mountains, 1 mile north-east of Badger Flat. Rocky slopes
2804
Comment
UCR26280
Eriogonum mohavense
John C. Roos, L. Roos
1952-5-17
5675
San Bernardino
Western Mojave Desert, 10 mi west of Adelanto
945
Comment
CLARK-A1528-3671
Eriogonum nidularium
John C. Roos, Lucille Roos
1947-7-15
2824
Inyo
Darwin Mesa
Comment
GH364476
Eriogonum nummulare
J. C. Roos & E. C. Jaeger
1955-7-22
6503
Unknown
Soldier Flat, east base Waucoba Mountain
2194
Comment
UCR27470
Eriogonum nummulare
John C. Roos, A. R. Roos
1954-8-15
6219
Inyo
Northern Mojave Desert, Inyo Mtns., Whipoorwill (or Soldier) flat at east side of Waucoba Mtn.
2165
Comment
CLARK-A1528-3680
Eriogonum ovalifolium subsp. ovalifolium
John C. Roos, Lucille Roos
1952-7-31
5877
Inyo
White Mountains
2834
Comment
CLARK-A1528-3681
Eriogonum ovalifolium subsp. ovalifolium
John C. Roos, Lucille Roos
1954-6-26
6158
Inyo
Inyo Mountains
2621
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
RSA48883
Eriogonum panamintense
J. C. Roos
1949-9-2
4640
San Bernardino
North slopes Kingston Mts
2073
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
CLARK-A1528-5182
Eriogonum parishii
John C. Roos
1946-8-27
2921
Riverside
Santa Rosa Mountains
2194
Comment
RSA659188
Eriogonum parishii
J. C. Roos
1965-10-2
s.n.
San Bernardino
Camp Angelus, San Bernardino Mtns.
Comment
UCR24310
Eriogonum parishii
John C. Roos
1941-9-26
1073
San Bernardino
San Bernardino Mtns., Bear Creek near Clarks Ranch
Comment
CLARK-A1528-5181
Eriogonum plumatella
John C. Roos
1965-7-21
San Bernardino
Victorville
Comment
UCR19263
Eriogonum plumatella
John C. Roos
1965-7-21
s.n.
San Bernardino
Mojave Desert, Victorville
Comment
CLARK-A1528-3695
Eriogonum pusillum
John C. Roos
1943-5-23
2667
Riverside
Little San Bernardino Mountains
914
Comment
CLARK-A1528-5180
Eriogonum pusillum
John C. Roos
1937-7-14
1817
San Bernardino
San Bernardino
Comment
UCR27664
Eriogonum reniforme
John C. Roos
1947-4-19
3490
Inyo
Death Valley: dry roadside - wash SE of Furnace Creek
732
Comment
UCR26229
Eriogonum rixfordii
John C. Roos
1947-1-26
3200
Inyo
Emigrant Canyon below Emigrant Spring, Death Valley
1150
Comment
UCR24314
Eriogonum roseum
John C. Roos
1937-8-10
1045
Kern
Southern Sierra Nevada Foothills, north of Caliente in the hills
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
RSA79541
Eriogonum rupinum
J. C. Roos, A. R. Roos
1953-8-11
5992
Inyo
2.5 miles east of Blue Bell Mine, Inyo Mts.
2866
Comment
CLARK-A1528-3706
Eriogonum saxatile
John C. Roos
1937-7-17
San Bernardino
Comment
GH364480
Eriogonum shockleyi
J. C. Roos
1955-7-21
6484
Unknown
Whitetop Peak, summit Last Chance Mountains
2560
Comment
RSA45492
Eriogonum spergulinum var. reddingianum
J. C. Roos, L. Roos
1948-9-7
3989
Mono
Crestview.
Comment
CLARK-A1528-3718
Eriogonum umbellatum
John C. Roos
1941-8-17
58
Inyo
Panamint Mountains
2743
Comment
POM262943
Eriogonum umbellatum subsp. munzii
J. C. Roos
1936-8-15
572
San Bernardino
Glen Martin, San Bernardino Mountains.
Comment
CAS-BOT-BC262190
Eriogonum umbellatum var. versicolor
John Roos; Lucille Roos
1951-8-9
5126
Inyo
Reed Flat, White Mts.
3169
Comment
RSA157086
Eriogonum umbellatum var. versicolor
J. C. Roos
1955-6-19
6432
Inyo
One mile SE of Willow Spring, Last Chance Mountains.
1951
Comment
RSA79482
Eriogonum umbellatum var. versicolor
J. C. Roos, A. R. Roos
1953-8-13
6012
Inyo
Along crest of Inyo mts. 3 miles east of Badger flat.
3262
Comment
CAS-BOT-BC262191
Eriogonum umbellatum var. versicolor
J. C. Roos; A. R. Roos
1953-8-13
6012
Inyo
Crest of Inyo Mts. 3 miles east of Badget Flat
3169
Comment
CLARK-A1528-3723
Eriogonum wrightii
John C. Roos
1967-10-28
Riverside
Whitewater
426
Comment
CAS-BOT-BC264937
Eriogonum wrightii var. subscaposum
J. C. Roos; A. R. Roos
1953-8-8
5943
Inyo
N.W end Badger Flat, Inyo Mts.
2682
Comment
UCR26132
Eriophyllum ambiguum
John C. Roos, A. R. Roos
1954-6-11
6128
Inyo
Northern Mojave Desert, Panamint Mountains, upper Wildrose Canyon near Wildrose Peak
2317
Comment
CLARK-A1528-1833
Eriophyllum confertiflorum var. tridactylum
John C. Roos
1937-5-29
2451
San Bernardino
San Bernardino Mountains
Comment
UCR23791
Eriophyllum lanatum var. obovatum
John C. Roos
1940-7-17
1889
San Bernardino
San Bernardino Mtns, Green Valley
2195
Comment
UCR26237
Eriophyllum multicaule
John C. Roos
1948-5-22
3866
San Bernardino
San Bernardino Valley, San Timoteo Canyon, south of Redlands
457
Comment
POM266312
Eriophyllum wallacei
J. C. Roos
1940-5-25
1904
San Bernardino
Near mouth of Santa Ana Canyon above Highlands.
Comment
UCR26264
Erodium brachycarpum
John C. Roos
1966-3-22
s.n.
Riverside
Moreno Valley, Edgemont.
Comment
RSA450311
Erythronium californicum
J. C. Roos
1938-4-4
1632
Napa
Pacific Union College, Angwin.
Comment
UC1234868
Eucrypta micrantha
J. C. Roos
1955-6-17
6413
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment
RSA659708
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-A1528-2698
Euphorbia fendleri
John C. Roos
1953-8-13
6022
Inyo
Inyo Mountains
2499
Comment
CLARK-A1528-2699
Euphorbia fendleri
John C. Roos
1949-5-28
4359
San Bernardino
Clark Mountain Range
1828
Comment
UCR26187
Euphorbia fendleri
John C. Roos
1949-5-28
6000
San Bernardino
Eastern Mojave Desert, north slope Clark Mountain
1829
Comment
CLARK-A1528-2700
Euphorbia fendleri
John C. Roos
1951-8-12
5193
Inyo
White Mountains
2194
Comment
CLARK-A1528-2701
Euphorbia maculata
John C. Roos
1942-9-12
1756
Los Angeles
Los Angeles
Comment
RSA659492
Euphorbia maculata
J. C. Roos, L. Roos
1951-7-28
s.n.
San Bernardino
Hwy 99, near Alabama St. west of Redlands, San Bernardino Valley.
366
Comment
UCR41278
Euphorbia micromera
John C. Roos
1948-9-18
4035
San Bernardino
Eastern Mojave Desert, near Coloseum Mine, Clark Mountain
1230
Comment
UCR25148
Euphorbia nutans
John C. Roos, L. Roos
1951-7-28
5065
San Bernardino
San Bernardino Valley, Hwy 99, near Alabama Street west of Redlands
366
Comment
RSA444476
Euphorbia peplus
J. C. Roos
1965-6-20
s.n
San Bernardino
Lawn in Loma Linda.
Comment
OBI33604
Euphorbia polycarpa
J. C. Roos
1946-10-26
3145
Riverside
Chuckwalla Mts
Comment
UCR22192
Euphorbia revoluta
John C. Roos, A. R. Roos
1950-8-4
4891
San Bernardino
Eastern Mojave Desert, north side of Clark Mountain
1220
Comment
CLARK-A1528-1309
Eustoma exaltatum
John C. Roos
1946-8-26
2977
San Bernardino
San Bernardino
Comment
CLARK-A1528-4428
Fagonia laevis
John C. Roos
1966-3-26
Riverside
Chuckwalla Mountains
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
CLARK-A1528-7830
Festuca arundinacea
John C. Roos
1949-5-21
4317
Riverside
Temecula
304
Comment
CLARK-A1528-7831
Festuca arundinacea
John C. Roos
1949-5-21
4317
Riverside
Temecula
304
Comment
CLARK-A1528-4665
Festuca brachyphylla
John C. Roos, Lucille Roos
1951-8-10
5149
Mono
White Mountains
4266
Comment
POM261420
Festuca californica subsp. parishii
J. C. Roos
1941-6-1
92
San Bernardino
Near Glen Martin. Near falls on road below.
Comment Read comments Feb 20 2015
RSA0047249
Festuca californica subsp. parishii
J. C. Roos, L. Roos
1951-6-9
5061
San Bernardino
Fredalba, San Bernardino Mts.
1767
Comment
UCR25371
Festuca californica var. parishii
John C. Roos, L. Roos
1951-6-9
5061
San Bernardino
San Bernardino Mtns., Fredalba
1768
Comment
UCR19357
Festuca elatior
John C. Roos
1950-5-20
4815
San Bernardino
San Bernardino Valley, edge of lawn on Central Street, San Bernardino
305
Comment
UCSB40902
Festuca microstachys
Roos, John
1939-4-18
Napa
3.5 mi N. of Pacific Union College; Angwin; roadside below Dilly's place
Comment
CLARK-A1528-4664
Festuca octoflora
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
UCR31677
Festuca pratensis
John C. Roos
1950-7-24
4882
Kern
Shafter, along edge of building
122
Comment
POM263461
Festuca rubra
J. C. Roos
1937-7-21
405
San Bernardino
Meadows on the south fork of the Sana Ana River.
1982
Comment
RSA415964
Festuca rubra
J. C. Roos, Steve Boyd
1965-7-31
s.n.
San Bernardino
South Fork Meadows, San Bernardino Mountains.
2287
Comment
POM263466
Festuca saximontana
J. C. Roos
1937-8-8
417
Inyo
Lone Pine Canyon.
3049
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
UCR30564
Filago californica
John C. Roos
1950-4-26
4760
San Bernardino
San Bernardino Valley, Loma Linda hill, Loma Linda
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
CLARK-A1528-1843
Filago depressa
John C. Roos
1952-4-23
5580
Riverside
Box Springs Mountain
457
Comment
CLARK-A1528-3288
Forestiera neomexicana
John C. Roos
1937-8-11
22
Los Angeles
Lancaster
Comment
CLARK-A1528-5704
Forestiera neomexicana
John C. Roos
1946-9-21
3066
San Bernardino
Lucerne Valley
Comment
CLARK-A1528-2492
Forsellesia nevadensis
John C. Roos
1955-4-11
6321
Inyo
1706
Comment Read comments Oct 3 2014
RSA104136
Forsellesia nevadensis
J. C. Roos, L. Roos
1955-4-11
6321
Inyo
E side of Inyo Mts. near Loretoo Mine
Comment
CLARK-A1528-2929
Frankenia grandifolia
John C. Roos
1941-6-16
San Diego
Pacific Beach
Comment
UCSB46879
Frankenia palmeri
Roos, John
1965-6-30
Riverside
Perris
Comment
UCR23700
Frankenia salina
John C. Roos
1950-6-24
4843
San Bernardino
Mojave Desert, Rabbit Springs
884
Comment
CLARK-A1528-2953
Frasera albomarginata
John C. Roos
1949-6-20
4419
San Bernardino
New York Mountains
1676
Comment
RSA157081
Frasera albomarginata
J. C. Roos
1955-6-19
6437
Inyo
Last Chance Mountains: 2.5 miles south of Willow Spring
2317
Comment Read comments Sep 5 2013
UCR25684
Frasera puberulenta
John C. Roos, A. R. Roos
1953-8-9
5955
Inyo
Northern Mojave Desert Region, Inyo Mountains, near head of Tamarack Canyon
3049
Comment
CLARK-A1528-2956
Frasera puberulenta
John C. Roos, Lucille Roos
1952-7-26
5824
Inyo
White Mountains
Comment
CLARK-A1528-5705
Fraxinus anomala
John C. Roos
1948-9-18
San Bernardino
Clark Mountain
Comment
UC1234828
Fraxinus anomala
J. C. Roos
1955-6-19
6441
Inyo
3 mi s Willow Springs; Last Chance Mountains
2377
Comment
UCR23796
Galinsoga parviflora
John C. Roos
1968-9-7
s.n.
San Bernardino
San Bernardino Mtns., Lake Arrowhead Village
1524
Comment
POM263133
Galinsoga parviflora var. parviflora
J. C. Roos
1941-2-18
201
San Bernardino
Loma Linda, San Bernardino Valley.
Comment
CLARK-A1528-3941
Galium andrewsii
John C. Roos
1967-7-30
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1353
Galium angustifolium
John C. Roos
1937-7-18
400
San Bernardino
San Gabriel Mountains |San Antonio Canyon
1706
Comment
CLARK-A1528-7883
Galium angustifolium subsp. angustifolium
John C. Roos
1948-5-8
3819
Riverside
Whitewater Canyon
548
Comment
UCR25131
Galium hallii
John C. Roos
1951-7-30
5074
Los Angeles
San Gabriel Mtns., Big Rock Creek, north of Mt. Baden Powell
1982
Comment
CAS-BOT-BC223091
Galium hilendiae subsp. carneum
John Roos; Lucille Roos
1947-7-14
2855
Inyo
North slope Baldy Peak (3 mi n Telescope Peak, probably = Rogers 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
CLARK-A1528-3950
Galium johnstonii
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3951
Galium matthewsii
John C. Roos
1941-8-17
63
Inyo
Panamint Mountains
2407
Comment
RSA47418
Galium munzii
J. C. Roos
1949-6-21
4433
San Bernardino
New York Mountains, Keystone Canyon
1829
Comment
UCR30592
Galium parisiense
John C. Roos
1950-7-22
4875
Sonoma
North Coast Range, 2 miles east of Duncan Mills
61
Comment
SD123748
Galium parisiense
J. C. Roos
1950-7-22
4875
Sonoma
Sand bar along stream bed 2 miles east of Duncan Mills
60
Comment
CLARK-A1528-5725
Galium stellatum
John C. Roos
1937-4-24
483
San Bernardino
Sheephole Mountains
Comment
UCR25406
Galium stellatum subsp. eremicum
John C. Roos, Lucille Roos
1949-4-6
4144
Riverside
Sonoran (Colorado) Desert, Canyon in the Orocopia Mountains, 2.5 mi. NE of Dos Palmas Spring
152
Comment
UCR26213
Galium trifidum
John C. Roos
1937-7-19
378
San Bernardino
San Bernardino Valley, [2 miles] south of San Bernardino
320
Comment
CLARK-A1528-2936
Garrya flavescens
John C. Roos
1947-3-15
3336
Riverside
San Jacinto Mountains
1066
Comment
RSA450235
Garrya veatchii
J. C. Roos
1938-2-6
s.n.
San Bernardino
Cajon Pass
Comment
CLARK-A1528-3331
Gaura coccinea
John C. Roos
1949-5-28
4340
San Bernardino
Clark Mountain
Comment
RSA47545
Gaura coccinea
J. C. Roos
1949-6-22
4444
San Bernardino
Near Barnwell, New York Mountains.
Comment
RSA48857
Gaura sinuata
J. C. Roos
1949-10-8
4689
San Bernardino
Jurupa Hills at south end Poplar Ave., Fontana.
305
Comment
NY999424
Gayophytum decipiens
J. C. Roos
1953-8-11
5999
Inyo
2½ miles east of Blue Bell Mine, Inyo Mountains
2987
Comment
RSA155734
Gayophytum ramosissimum
J. C. Roos
1955-6-21
6462
Inyo
Last Chance Mountains 2miles NE of Willow Spring.
1951
Comment
UCR25797
Gentiana amarella
John C. Roos
1937-8-8
977
Inyo
Sierra Nevada Mtns., Lone Pine Canyon below Mt. Whitney
3506
Comment
CLARK-A1528-5710
Gentiana newberryi
John C. Roos
1948-9-7
4006
Mono
Comment
UCR25302
Gentiana tenella
John C. Roos
1959-8-23
s.n.
Mono
White Mtns., Cottonwood Creek
3049
Comment
CLARK-A1528-2963
Geranium richardsonii
John C. Roos
1937-7-21
1183
San Bernardino
San Bernardino Mountains
Comment
RSA0094651
Gilia
J. C. Roos
1955-6-17
6394
Inyo
2 miles north of Willow Spring, Last Chance Mountains.
2011
Comment
RSA659510
Gilia angelensis
J. C. Roos, L. Roos
1954-4-17
6069
Riverside
Pass at summit of Reche Canyon.
732
Comment
UCR19146
Gilia angelensis
John C. Roos, L. Roos
1954-4-10
6064
San Diego
Peninsular Range, San Pasqual
152
Comment
CLARK-A1528-3503
Gilia capitata
John C. Roos
1937-6-18
1236
San Diego
Palomar Mountains
Comment
UCR26282
Gilia capitata subsp. abrotanifolia
John C. Roos, L. Roos
1952-4-27
5585
Riverside
San Timoteo Canyon, south of Redlands
427
Comment
CLARK-A1528-5711
Gilia eremica
John C. Roos
1937-5-31
1653
Kern
Mojave
Comment
UCR24227
Gilia latiflora subsp. davyi
John C. Roos
1949-4-30
4275
San Bernardino
Mojave Desert, north of Hesperia, at intersection of Apple Valley Road and the railroad tracks
854
Comment
UCSB41132
Gilia leptantha subsp. leptantha
Roos, John
1961-9-30
San Bernardino
San Bernardino Mtns., Cieniega Seca Creek
2346
Comment
UCD117866
Gilia ochroleuca
John Roos; Lucille Roos
1952-5-17
5676
San Bernardino
8 miles west of Adelanto, Mohave desert.
944
Comment
CAS-BOT-BC401926
Gilia ochroleuca subsp. ochroleuca
J. C. Roos
1955-6-17
6411
Inyo
2 miles 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
UC1234827
Gilia ophthalmoides
J. C. Roos
1955-6-19
6438
Inyo
3 mi s Willow Spring (Last Chance Mountains); , s of Willow Spring
2286
Comment
RSA158118
Gilia ophthalmoides
J. C. Roos
1955-7-22
6501
Inyo
Crest of Inyo Mountains at jct. of Eureka Valley and Saline Valley roads
2241
Comment
UC1042973
Gilia ripleyi
John and Lucille Roos
1954-5-9
6107
Inyo
Emigrant Canyon Panamint Mts, Emigrant Canyon (Panamint Mts.)
1219
Comment
CLARK-A1528-3517
Gilia splendens subsp. splendens
John C. Roos
1937-7-20
2366
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3519
Gilia splendens subsp. splendens
John C. Roos
1937-5-31
San Bernardino
Cajon Canyon
Comment
CAS-BOT-BC229520
Gilia triodon
J. C. Roos
1949-5-28
3541
San Bernardino
N slope of Clark Mountain
1584
Comment
CAS-BOT-BC266539
Githopsis diffusa
John Roos; Lucille Roos
1952-5-24
5710
Riverside
N of Moreno
502
Comment
UCR23687
Githopsis diffusa subsp. diffusa
John C. Roos
1950-4-22
4750
Riverside
Hills NE of the summit of Reche Canyon
823
Comment
CLARK-A1528-3096
Glechoma hederacea
John C. Roos
1954-4-7
6059
San Bernardino
Loma Linda Valley
350
Comment
UC1080632
Glossopetalon spinescens
John and Lucille Roos
1955-4-11
6321
Inyo
near Loretto Mine (e side of mts.); Inyo Mts.
1706
Comment
UCR23702
Glossopetalon spinescens
John C. Roos, L. Roos
1955-4-11
6321
Inyo
Northern Mojave Desert, Inyo Mtns, Loretto Road above Loretto Mine, east side of range
1707
Comment
UCR25936
Glossopetalon spinescens
John C. Roos
1949-6-19
4402
San Bernardino
Eastern Mojave Desert, SE foot of Clark Mountain
1951
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
UCR25613
Glyceria elata
John C. Roos
1937-7-21
419
San Bernardino
San Bernardino Mtns, South Fork [Santa Ana River, near USFS campground]
1829
Comment
RSA659628
Glyceria striata
J. C. Roos
1965-7-3
s.n.
Riverside
Dark Canyon, San jacinto Mtns.
Comment
CLARK-A1528-5407
Glycyrrhiza lepidota
John C. Roos
1965-6-16
San Bernardino
Victorville
914
Comment
UCR23904
Glycyrrhiza lepidota
John C. Roos
1937-5-29
825
San Bernardino
San Bernardino Mtns, Deep Creek
Comment
UCR23905
Glycyrrhiza lepidota
John C. Roos
1942-6-6
1064
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
CLARK-A1528-4848
Gnaphalium californicum
John C. Roos
1948-6-26
3890
San Bernardino
San Bernardino Mountains
Comment
RSA450486
Gnaphalium chilense
J. C. Roos
1965-7-18
s.n.
San Bernardino
Bear Valley, San Bernardino Mtns.
Comment
CLARK-A1528-1856
Gnaphalium microcephalum
John C. Roos
1937-8-19
2501
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-4906
Gnaphalium microcephalum
John C. Roos
1947-9-6
3745
Riverside
San Jacinto Mountains
Comment
UCR20326
Gnaphalium palustre
John C. Roos
1952-6-8
5742
Riverside
canyon 4 mi NW of Moreno
640
Comment
UCR25554
Gnaphalium stramineum
John C. Roos
1941-4-25
158
Riverside
Plateau in Reche Canyon
Comment
UCR25852
Grayia spinosa
John C. Roos
1949-4-2
4132
Riverside
San Bernardino Mtns., Side canyon off Whitewater Canyon
Comment
RSA85146
Guillenia lasiophylla
J. C. Roos
1952-4-9
5500
Riverside
Mt Rubidoux.
396
Comment
RSA0040194
Guizotia abyssinica
John C. Roos
1955-7-2
6473
San Diego
Escondido.
182
Comment
RSA659722
Gutierrezia bracteata
J. C. Roos
1965-9-26
s.n.
Riverside
Rocky point near Palm Springs Station.
Comment
CAS-BOT-BC304639
Gutierrezia californica
J. C. Roos
1965-6-21
s.n.
Riverside
The hills 2 miles south of Beaumont
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
SD52995
Gutierrezia microcephala
J. C. Roos, A. R. Roos
1955-8-24
6540
Inyo
Last Chance Mountains, 1.5 miles northeast of Willow Spring.
1890
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
UCR23827
Gutierrezia microcephala
John C. Roos
1946-9-21
3045
San Bernardino
Mojave Desert, Rabbit Springs, Lucerne Valley
887
Comment
CAS-BOT-BC308507
Gutierrezia sarothrae
J. C. Roos; A. R. Roos
1955-8-23
6533
Inyo
West base Last Chance Mts. east of Eureka Valley sand dunes
1219
Comment
CLARK-A1528-1866
Gutierrezia sarothrae
John C. Roos
1941-8-17
54
Inyo
Panamint Mountains
2804
Comment
RSA450481
Gutierrezia sarothrae
J. C. Roos
1966-8-6
s.n.
San Bernardino
Upper Fish Creek at Fish Creek Meadows.
2439
Comment
CLARK-A1528-3383
Habenaria leucostachys
John C. Roos
1936-7-30
953
San Bernardino
San Bernardino Mountains
Comment
RSA45481
Halimolobos jaegeri
J. C. Roos
1948-9-18
4045
San Bernardino
Clark Mtn
2134
Comment
RSA85657
Halimolobos jaegeri
J. C. Roos
1950-8-6
4914
San Bernardino
Kingston Peak, Kingston Mountains., Eastern Mojave Desert.
2165
Comment
CLARK-A1528-1870
Haplopappus acradenius
John C. Roos
1947-9-18
2791
Los Angeles
Comment
CLARK-A1528-1871
Haplopappus acradenius
John C. Roos
1946-9-2
2986
San Bernardino
San Timoteo Canyon
Comment
RSA659724
Haplopappus brickellioides
J. C. Roos, P. A. Munz
1955-4-8
6306
Inyo
Northern Mojave Desert Last Chance Mtns, east of Eureka Valley sand dunes.
1220
Comment
UCR23803
Haplopappus brickellioides
John C. Roos, P. A. Munz
1955-4-8
6306
Inyo
Northern Mojave Desert, Last Chance Mtns, east of Eureka Valley sand dunes
1220
Comment
CLARK-A1528-1880
Haplopappus cuneatus
John C. Roos
1948-9-25
4076
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1881
Haplopappus cuneatus
John C. Roos
1942-10-24
2575
Riverside
Joshua Tree National Park
Comment
CLARK-A1528-5602
Haplopappus macronema
John C. Roos
1959-8-20
Inyo
White Mountains
3047
Comment
CLARK-A1528-2158
Haplopappus parishii
John C. Roos
1941-10-4
864
Los Angeles
San Gabriel Mountains
1219
Comment
CLARK-A1528-1907
Haplopappus venetus subsp. furfuraceus
John C. Roos
1937-8-31
2507
San Diego
Oceanside
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
CLARK-A1528-1895
Haplopappus venetus subsp. vernonioides
John C. Roos
1965-9-21
Riverside
March Air Force Base
Comment
GH417917
Hazardia brickellioides
J. C. Roos
1955-7-23
6513
Unknown
Beveridge Canyon, east base Inyo Mts., Saline Valley
640
Comment
CLARK-A1528-1933
Hecastocleis shockleyi
John C. Roos, Lucille Roos
1954-5-8
6094
Inyo
Grapevine Mountains
1645
Comment
RSA92062
Hecastocleis shockleyi
J. C. Roos, L. Roos
1954-5-8
6094
Inyo
Crest of Grapevine Mts., Leadfield
1646
Comment
UCR26291
Hedeoma nana
John C. Roos
1950-9-3
4977
San Bernardino
Eastern Mojave Desert, canyon on south side Clark Mountain, NW of Mountain Pass
1829
Comment
HSC78509
Hedypnois cretica
A. R. Roos
1954-5-17
Los Angeles
Hollywood, near North Kenmore & Oakdale Streets.
91
Comment
OBI33605
Hedypnois rhagadioloides
A. R. Roos
1954-5-17
s.n.
Los Angeles
Near N Kenmore and Oakdale Sts, Hollywood
91
Comment
UCSB45578
Helenium bigelovii
Roos, John
1965-9-11
San Bernardino
Bank of Mill Creek, San Bernardino Mtns.
Comment
UC1495798
Helianthus annuus
J. C. Roos
1950-4-7
4728
Inyo
at Tecopa Tecopa
426
Comment Read comments Sep 29 2010
RSA594031
Helianthus annuus subsp. lenticularis
J. C. Roos
1965-10-3
s.n.
San Bernardino
Loma Linda
Comment
CLARK-A1528-1909
Helianthus bolanderi
John C. Roos
1956-8-4
6592
Santa Barbara
1219
Comment
UCSB37797
Helianthus niveus
Roos, John
1965-4-28
Riverside
Palm Springs
Comment
UCSB37798
Helianthus niveus
Roos, John
1962-4-3
Riverside
Palm Springs Airport
121
Comment
CLARK-A1528-1913
Helianthus niveus subsp. canescens
John C. Roos
1965-4-28
Riverside
Palm Springs
Comment
UCD132933
Heliomeris multiflora var. nevadensis
J. C. Roos
1965-7-11
s.n.
Inyo
Wildrose Canyon, at kilns. Panamint Mountains.
Comment
CLARK-A1528-1916
Hemizonia arida
John C. Roos
1969-5-10
Kern
Red Rock Canyon
Comment
UCR23814
Hemizonia arida
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment
RSA450490
Hemizonia floribunda
J. C. Roos
1965-10-10
s.n.
San Diego
8 mi SE of Dulzura.
Comment
RSA659714
Hemizonia kelloggii
J. C. Roos
1965-6-27
s.n.
Riverside
Reche Canyon
Comment
UCR23815
Hemizonia kelloggii
John C. Roos
1965-6-27
s.n.
Riverside
Reche Canyon
Comment
RSA92593
Hemizonia kelloggii
J. C. Roos
1952-5-26
5713
Riverside
Hass' Ranch. Reche Canyon.
457
Comment
CLARK-A1528-1927
Hemizonia ramosissima
John C. Roos
1965-6-27
San Bernardino
Loma Linda Hills
1000+ ft
Comment
CAS-BOT-BC388484
Herniaria hirsuta var. cinerea
John C. Roos
1954-6-5
6123
San Bernardino
Loma Linda, San Bernardino Valley
320
Comment
UCR24463
Hesperocnide tenella
John C. Roos
1952-4-13
5537
Riverside
Riverside, north base of the Box Springs Mtns.
396
Comment
RSA155689
Hesperostipa comata subsp. comata
J. C. Roos
1955-6-19
6453
Inyo
Willow Spring, Last Chance Mountains
1829
Comment
RSA47318
Hesperostipa comata subsp. comata
J. C. Roos
1949-6-19
4396
San Bernardino
SE base of Clark Mountain
Comment
CLARK-A1528-1023
Heterocodon rariflorum
John C. Roos
1937-5-29
San Bernardino
San Bernardino Mountains
Comment
RSA0074602
Heterotheca fastigiata
J. C. Roos, Lucille Roos
1949-9-17
4657
Riverside
Whitewater Wash, 2.2 miles N of Whitewater.
518
Comment
CLARK-A1528-1928
Heterotheca grandiflora
John C. Roos
1951-9-19
5224
San Bernardino
Loma Linda
335
Comment
GH417925
Heterotheca sessiliflora
J. C. Roos & L. Roos
1950-8-19
4938
Unknown
4
Comment Read comments Jul 22 2016
RSA0075939
Heterotheca sessiliflora
J. C. Roos, Lucille Roos
1950-8-19
4938
San Diego
Torrey Pines beach.
5
Comment
UCR18771
Heterotheca sessiliflora subsp. fastigiata
John C. Roos
1965-9-26
s.n.
Riverside
San Jacinto Mtns., Thomas (Garner) Valley
Comment
CAS-BOT-BC310878
Heterotheca sessiliflora subsp. sessiliflora
John Roos; Lucille Roos
1950-8-19
4938
San Diego
Torrey Pines beach
4
Comment
UCR23812
Heterotheca subaxillaris
John C. Roos
1965-9-26
s.n.
Riverside
Sonoran (Colorado) Desert, 2 mi south of Jackson St., Indio
Comment
UCSB42205
Heterotheca subaxillaris
Roos, John
1965-9-26
Riverside
2 miles south of Jackson St., Indio
Comment
UCD133099
Heterotheca villosa
J. C. Roos
1965-9-16
s.n.
Riverside
on State St. near Florida St, Hemet.
Comment
UCR23297
Heterotheca villosa var. scabra
John C. Roos, Lucille Roos
1950-10-21
5011
Riverside
Mojave Desert, Little San Bernardino Mountains, Wonderland of Rocks [Joshua Tree National Park]
1220
Comment
UCR24439
Heuchera hirsutissima
John C. Roos
1946-8-27
2784
Riverside
Peninsular Range, Santa Rosa Mtns
2287
Comment
CAS-BOT-BC425019
Heuchera parvifolia
John Roos; Lucille Roos
1952-7-30
5874
Mono
Crooked Creek, White Mts.
3078
Comment
CLARK-A1528-4094
Heuchera rubescens
John C. Roos, Lucille Roos
1947-7-14
2850
Inyo
Panamint Mountains
2651
Comment
CLARK-A1528-4095
Heuchera rubescens
John C. Roos
1941-8-17
49
Inyo
Panamint Mountains
3200
Comment
CAS-BOT-BC424467
Heuchera rubescens
John Roos; Lucille Roos
1947-7-13
2883
Inyo
Telescope Peak, Panamint Mts.
3291
Comment
RSA0062965
Heuchera rubescens var. alpicola
J. C. Roos
1947-7-14
2850
Inyo
North slope Baldy Peak, Panamint Mts.
2652
Comment
CLARK-A1528-1943
Hieracium albiflorum
John C. Roos
1937-7-20
2470
San Bernardino
San Bernardino Mountains
1981
Comment
CLARK-A1528-4678
Hilaria jamesii
John C. Roos, Lucille Roos
1954-5-8
6095
Inyo
Grapevine Mountains
0
Comment
UCSB51279
Hilaria rigida
Roos, John
1965-9-5
Riverside
18 miles W. of Blythe
Comment
CLARK-A1528-7811
Hoffmannseggia falcaria
John C. Roos
1940-8-31
241
Los Angeles
Monterey Park
Comment
RSA262779
Hoffmannseggia glauca
J. C. Roos
1936-5-3
710
San Diego
San Felipe Valley, west edge Colorado Desert.
Comment
CLARK-A1528-1248
Holcus lanatus
John C. Roos
1937-8-4
420
Inyo
Independence
Comment
UCR23810
Holocarpha heermannii
John C. Roos
1965-8-21
s.n.
Tulare
Sierra Nevada Mtns., Middle Fork of Kaweah River Canyon, west of Sequoia National Forest
Comment
CAS-BOT-BC320361
Holocarpha virgata
J. C. Roos
1965-10-10
s.n.
San Diego
Otay Lake
Comment
UCSB42192
Holocarpha virgata
Roos, John
1965-10-10
San Diego
Otay Lake
Comment
CLARK-A1528-1267
Hordeum californicum
John C. Roos
1937-7-22
409
San Bernardino
San Bernardino Mountains
1828
Comment
CLARK-A1528-4688
Hordeum californicum
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR26285
Hordeum depressum
John C. Roos
1952-4-22
5566
San Bernardino
San Bernardino Valley, Waterman Ave. west of Loma Linda
305
Comment
UCSB45577
Hordeum depressum
Roos, John
1952-4-22
San Bernardino
Waterman Ave. west of Loma Linda, San Bernardino Valley
304
Comment
UCR26284
Hordeum intercedens
John C. Roos
1952-4-23
5571
Riverside
Perris-Aguanga Basin region, 1 mi SE of Perris
427
Comment
RSA45206
Hordeum jubatum
J. C. Roos, L. Roos
1949-5-14
4306
San Bernardino
Lucerne Valley
884
Comment
UCR24056
Hordeum jubatum
John C. Roos
1949-5-14
4306
San Bernardino
S Mojave Desert, Lucerne Valley
884
Comment
CLARK-A1528-3997
Horkelia bolanderi
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3999
Horkelia bolanderi subsp. parryi
John C. Roos
1937-7-21
Roos No. 2374
San Bernardino
San Bernardino Mountains
Comment
POM251758
Horkelia californica subsp. dissita
J. C. Roos
1937-7-31
8
San Bernardino
Crestline, San Bernardino Mountains.
Comment
CLARK-A1528-3064
Horkelia elata
John C. Roos
1943-8-1
2696
San Bernardino
San Bernardino County
Comment
RSA71739
Horkelia hispidula
J. C. Roos, L. Roos
1952-7-28
5856
Inyo
White Mountains; head of Wyman Canyon
3201
Comment
RSA450257
Horkelia rydbergii
J. C. Roos
1965-7-18
s.n.
San Bernardino
Snow Valley, San Bernardino Mountains.
Comment
UCR23776
Hulsea californica
John C. Roos
1937-6-15
2504
San Diego
Peninsular Range, Peak above Cuyamaca Lake
Comment
CLARK-A1528-4948
Hulsea heterochroma
John C. Roos
1942-6-20
1274
Riverside
San Jacinto Mountains
Comment
POM266314
Hulsea heterochroma
J. C. Roos
1942-6-20
1274
Riverside
Roadside N of Idyllwild.
Comment
CLARK-A1528-1953
Hulsea vestita
John C. Roos
1937-7-16
2469
Los Angeles
San Gabriel Mountains
2895
Comment
CLARK-A1528-1956
Hulsea vestita
John C. Roos
1965-6-26
San Bernardino
San Bernardino Mountains
Comment
RSA89977
Hydrocotyle umbellata
J. C. Roos
1950-9-22
4990
San Bernardino
Edge of pond, Loma Linda, San Bernardino Valley.
335
Comment
UCR18635
Hydrocotyle verticillata
John C. Roos, A. R. Roos
1950-8-7
4917
Inyo
Northern Mojave Desert, China Ranch near Tecopa Pass
427
Comment
UCR18632
Hymenoclea monogyra
John C. Roos
1947-5-11
3608
San Bernardino
San Bernardino Valley, Fontana Power Station, N. of Rialto
488
Comment
UCR23780
Hymenoclea monogyra
John C. Roos
1965-10-9
s.n.
San Diego
Murphy Canyon
Comment
UCR23775
Hymenopappus filifolius
John C. Roos
1949-6-21
4426
San Bernardino
Eastern Mojave Desert, New York Mtns, Keystone Canyon
1829
Comment
RSA47459
Hymenopappus filifolius var. eriopodus
J. C. Roos
1949-6-24
4481
San Bernardino
N side of Clark Mtn.
2134
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
UCSB45611
Hymenoxys acaulis
Roos, John
1948-9-18
San Bernardino
Clark Mtn.
1981
Comment
RSA47471
Hymenoxys acaulis var. arizonica
J. C. Roos
1949-5-28
4348
San Bernardino
N slope Clark, Mts
1829
Comment
CLARK-A1528-1970
Hymenoxys cooperi
John C. Roos
1949-6-24
4482
San Bernardino
Clark Mountain
2103
Comment
CLARK-A1528-1003
Hymenoxys odorata
John C. Roos
1949-4-8
4199
Imperial
60
Comment
CLARK-A1528-1006
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-A1528-4892
Hypochaeris radicata
John C. Roos
1937-6-6
471
San Bernardino
Loma Linda
Comment
UCSB46874
Impatiens balfourii
Roos, John; Roos, Lucille
1957-6-22
San Bernardino
Zanja Creek at Mentone Health Haven, east of Mentone
548
Comment
CLARK-A1528-4696
Imperata brevifolia
John C. Roos
1965-6-23
Riverside
Palm Springs
Comment
UCR20456
Imperata brevifolia
John C. Roos
1949-9-7
4655
Riverside
Sonoran (Colorado) Desert, 1 mi west of Whitewater bridge on Hwy 99 along a canal
396
Comment
RSA45474
Ipomopsis arizonica
J. C. Roos, L. Roos
1948-9-18
4065
San Bernardino
Clark Mts.,
Comment
RSA34196
Isocoma acradenia
J. C. Roos
1947-9-18
2791
Los Angeles
Lancaster
Comment
UCR20324
Isocoma acradenia var. acradenia
John C. Roos, Lucille Roos
1954-9-15
6242
Inyo
Northern Mojave Desert, Shoshone, near airstrip
488
Comment
RSA444685
Isocoma menziesii var. vernonioides
J. C. Roos
1965-9-21
s.n
Riverside
On the W side of March Air Force Base along 395 Hwy.
Comment
UCR23335
Isoetes
John C. Roos
1968-8-27
s.n.
Fresno
Sierra Nevada Mtns, Dragon Lake
3377
Comment
UCR23334
Isoetes occidentalis
John C. Roos
1965-8-27
s.n.
Fresno
Sierra Nevada Mountains, Rae Lakes
3201
Comment
CLARK-A1528-1971
Iva acerosa
John C. Roos
1949-9-2
San Bernardino
East Mojave Desert
Comment
CLARK-A1528-5228
Iva acerosa
John C. Roos
1949-9-3
4651
Inyo
Tecopa
457
Comment
POM263545
Ivesia pygmaea
J. C. Roos
1937-8-8
534
Inyo
Lone Pine Canyon.
2744
Comment
UCR23503
Ivesia santolinoides
John C. Roos
1942-6-25
1747
Mariposa
Sierra Nevada Mtns., Yosemite National Park, top of Half Dome
2683
Comment
RSA0018958
Ivesia santolinoides
Roos
1965-7-18
s.n.
San Bernardino
Arrowbear.
Comment
RSA40591
Jamesia americana var. californica
J. C. Roos
1947-7-14
2848
Inyo
Panamint Mountains, north slope of Baldy Peak
2744
Comment
CAS-BOT-BC47086
Jamesia americana var. rosea
John Roos; Lucille Roos
1947-7-14
2848
Inyo
N. slope of Baldy Peak, Panamint Mts.
2743
Comment
RSA659607
Jamesia americana var. rosea
J. C. Roos
1956-9-29
6602
Inyo
Head of Death Valley Canyon, Panamint Mtns. At the base of limestone cliffs.
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
SEINET13942195
Juglans californica
John C. Roos
1966-1
San Bernardino
Flats at Palm Ave. and Kendall Dr., north-west of San Bernardino
Comment
CLARK-A1528-5053
Juncus phaeocephalus var. paniculatus
John C. Roos
1948-5-15
3837
Riverside
Eagle Mountains
Comment
RSA450180
Juniperus californica
A. R. Roos
1934-1-22
s.n.
Riverside
Morongo Canyon.
Comment
RSA648667
Kallstroemia californica
J. C. Roos
1963-10-24
s.n.
Riverside
Hayfields, Colorado Desert.
Comment
SEINET13945561
Kallstroemia californica
J. C. Roos
1937-1
357
Riverside
Blythe
Comment
RSA52772
Kallstroemia parviflora
J. C. Roos, A. R. Roos
1950-8-5
4904
San Bernardino
Eastern Mojave Desert Coliseum Mine, Clark Mountain.
1707
Comment
SEINET13945591
Kallstroemia parviflora
A. R. Roos
1950-1
sn
San Bernardino
N side of Clark Mt., 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
UCR23628
Kalmia polifolia subsp. microphylla
John C. Roos
1942-7-1
1252
Mariposa
Sierra Nevada Mtns, Yosemite National Park, on the Forsythe Pass Trail
2591
Comment
UCR24498
Keckiella corymbosa
John C. Roos
1939-7-16
274
Napa
North Coast Range, Palisades, Napa Range near Calistoga
823
Comment
CAS-BOT-BC238267
Keckiella rothrockii
J. C. Roos
1955-7-21
6494
Inyo
Last Chance Mountains 1 mile south of Willow Spring
2072
Comment
CLARK-A1528-4213
Keckiella rothrockii
John C. Roos
1937-8-5
1026
Inyo
White Mountains
Comment
UC1234822
Keckiella rothrockii
J. C. Roos
1955-7-21
6494
Inyo
1 mi s Willow Spring; Last Chance Mountains
2072
Comment
CLARK-A1528-3962
Kelloggia galioides
John C. Roos
1937-7-22
1172
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1184
Kochia americana
John C. Roos
1965-9-18
Inyo
Inyo Mountains
Comment
UCR19046
Kochia americana
John C. Roos
1965-9-18
s.n.
Inyo
Northern Mojave Desert, Darwin Mesa [=Darwin Plateau]
Comment
POM274198
Kochia californica
J. C. Roos
1947-9-18
2790
Los Angeles
2 mi. N of Lancaster.
Comment
RSA71757
Koeleria macrantha
J. C. Roos, L. Roos
1951-8-8
5105
Mono
Big Prospector Meadow at head of Crooked Creek, White Mountains
3201
Comment
RSA79719
Koeleria macrantha
J. C. Roos, A. R. Roos
1953-8-9
5966
Inyo
Ridge southeast of Tamarack Canyon, Inyo Mountains
3232
Comment
RSA85408
Koeleria macrantha
J. C. Roos
1952-4-29
5598
Riverside
Reche Canyon
457
Comment
UCR25372
Koeleria macrantha
John C. Roos, A. R. Roos
1954-6-12
6134
Inyo
Northern Mojave Desert, Panamint Mountains, Wildrose Peak
2652
Comment
RSA0104244
Kopsiopsis strobilacea
John C. Roos
1937-7-17
375
Los Angeles
Near Telegraph Peak, San Gabriel Mts.
Comment
CLARK-A1528-5687
Krameria grayi
John C. Roos
1937-4-23
796
Riverside
Whitewater
Comment
CLARK-A1528-5688
Krameria grayi
John C. Roos
1946-5-15
3856
Riverside
Eagle Mountains
Comment
RSA155656
Krascheninnikovia lanata
J. C. Roos, A. Roos
1955-8-25
6547
Inyo
Little Cowhorn Valley, Inyo Mts.
2188
Comment
CLARK-A1528-4705
Lamarckia aurea
John C. Roos
1947-3-21
3373
Riverside
Reche Canyon
Comment
POM301536
Lamium amplexicaule
J. C. Roos
1938-3-12
1642
Riverside
Orchard, La Sierra.
Comment
CLARK-A1528-3537
Langloisia setosissima
John C. Roos
1949-4-6
4148
Riverside
Comment
RSA450244
Lappula occidentalis var. occidentalis
J. C. Roos
1967-5-30
s.n.
San Bernardino
In meadow near Arrastre Creek.
2287
Comment
RSA92176
Lappula occidentalis var. occidentalis
J. C. Roos
1954-6-26
6155
Inyo
Mouth of Tamarack Canyon
2683
Comment
CLARK-A1528-4436
Larrea tridentata
John C. Roos
1937-4-18
1354
Riverside
Whitewater
Comment
CLARK-A1528-1640
Lasthenia chrysostoma
John C. Roos
1952-4-2
5459
Riverside
Box Springs
487
Comment
CLARK-A1528-2148
Lasthenia chrysostoma
John C. Roos
1952-4-13
5535
Riverside
Box Springs Mountains
396
Comment
CLARK-A1528-7804
Lasthenia coronaria
John C. Roos
1938-4-4
1630
Riverside
La Sierra
Comment
RSA92749
Lasthenia gracilis
J. C. Roos
1952-5-21
5706
Riverside
San Jacinto River bottomland 1.5 miles southeast of Perris
426
Comment
CLARK-A1528-259
Layia glandulosa
John C. Roos
1963-4-5
630405-1
San Bernardino
609
Comment
CLARK-A1528-1980
Layia platyglossa
John C. Roos
1941-5-10
130
Riverside
San Jacinto Mountains
Comment Read comments Jan 3 2018
CLARK-A1528-1981
Layia platyglossa
John C. Roos
1940-5-20
905
Riverside
Reche Canyon
Comment
UCR25544
Layia platyglossa
John C. Roos
1941-4-19
170
Riverside
Peninsular Range, Loma Linda Hills/Box Springs Mtns.; plateau in Reche Canyon
671
Comment
UCR23630
Ledum glandulosum
John C. Roos
1942-7-1
1249
Mariposa
Sierra Nevada Mtns, Yosemite National Park, south slope of Cloud's Rest
2591
Comment
POM264171
Lemna minuta
J. C. Roos
1937-7-25
656
San Bernardino
Seven Oaks, San Bernardino Mountains.
Comment
RSA449963
Lemna trisulca
J. C. Roos
1942-11-28
2587
San Bernardino
Deep Creek, San Bernardino Mountains.
914
Comment
UCR19725
Lepidium chalepense
John C. Roos, Lucille Roos
1952-4-19
5914
San Bernardino
San Bernardino Valley, Barton Road at Loma Linda
335
Comment
CLARK-A1528-7862
Lepidium lasiocarpum
John C. Roos
1949-4-8
4189
Imperial
Chocolate Mountains
Comment
CLARK-A1528-2327
Lepidium perfoliatum
John C. Roos
1949-4-30
4259
San Bernardino
Lucerne Valley
Comment
CLARK-A1528-2329
Lepidium virginicum
John C. Roos
1950-6-24
4838
San Bernardino
San Bernardino Mountains
2224
Comment
CLARK-A1528-5233
Lepidium virginicum
John C. Roos
1952-3-19
5405
Riverside
Box Springs Mountains
487
Comment
RSA49009
Lepidium virginicum var. robinsonii
J. C. Roos
1950-2-14
4706
Los Angeles
Between Rinehart St. and Prospect Park, Los Angeles
Comment
RSA85151
Lepidium virginicum var. robinsonii
J. C. Roos
1952-4-9
5475
Riverside
Fairmount Park
259
Comment
GH427611
Lepidospartum latisquamum
J. C. Roos & A. R. Roos
1955-8-24
6539
Unknown
near Willow Spring, Last Chance Mts.
1828
Comment
UCR18687
Lepidospartum latisquamum
John C. Roos
1950-9-3
4971 (=4408)
San Bernardino
Eastern Mojave Desert, Clark Mountain, south slope
1890
Comment
UCR24021
Lepidospartum latisquamum
John C. Roos
1968-10-5
s.n.
San Bernardino
San Bernardino Valley, 1 mi west of Cajon
915
Comment
UCSB49607
Lepidospartum latisquamum
Roos, John
1951-7-30
Los Angeles
Swartout Valley between Wrightwood and Big Pines, San Gabriel Mts.
1981
Comment
CLARK-A1528-4710
Leptochloa fascicularis
John C. Roos
1946-9-21
3072
San Bernardino
Rabbit Springs
883
Comment
CLARK-A1528-4711
Leptochloa filiformis
John C. Roos
1958-9-28
Riverside
Coachella
Comment
POM266613
Leptochloa fusca subsp. uninervia
J. C. Roos
1937-7-31
2358
San Bernardino
Santa Ana River near San Bernardino.
Comment
CLARK-A1528-1366
Leptodactylon pungens
John C. Roos
1943-7-4
2723
San Bernardino
San Bernardino Mountains
Comment
RSA450143
Leptosiphon breviculus
J. C. Roos
1965-6-26
s.n.
San Bernardino
Upper Santa Ana Basin, near Fish Creek. San Bernardino Mtns.
Comment
UCSB42140
Leptosiphon breviculus
Roos, John
1965-6-26
San Bernardino
Upper Santa Ana Basin near Fish Creek, San Bernardino Mtns.
Comment
CAS-BOT-BC227038
Leptosiphon floribundus subsp. floribundus
J. C. Roos
1965-6-26
s.n.
San Bernardino
Barton Flats, San Bernardino Mtns.
Comment
UCR19089
Lesquerella kingii
John C. Roos, L. Roos
1952-7-26
5821
Inyo
White Mtns, east side of Reed Flat at head of Birch Creek
3049
Comment
UCSB37775
Lessingia leptoclada
Roos, John
1965-8-21
Tulare
Kaweah River Canyon, west of Sequoia Natl. Park
609
Comment
CLARK-A1528-1994
Leucelene ericoides
John C. Roos
1949-6-19
4398
San Bernardino
Clark Mountain
1889
Comment
RSA47475
Leucelene ericoides
J. C. Roos
1949-6-18
4395
San Bernardino
Pmtn Pass, Clark Mtn
1340
Comment
CLARK-A1528-3825
Lewisia brachycalyx
John C. Roos
1939-5-26
715
San Bernardino
San Bernardino Mountains
2285
Comment
CLARK-A1528-3830
Lewisia rediviva subsp. minor
John C. Roos
1967-6-30
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC283900
Leymus cinereus
J. C. Roos; A. R. Roos
1947-7-11
2906
Inyo
Wild Rose Canyon, Panamint Mountains
2377
Comment
RSA72063
Leymus cinereus
J. C. Roos, L. Roos
1951-8-12
5185
Inyo
Reed Flat, White Mountains.
3110
Comment
UCR25201
Lilium humboldtii
John C. Roos
1949-7-30
4588
San Diego
Peninsular Range, Palomar Mtn. near Doane Meadows
Comment
CLARK-A1528-3193
Lilium parryi
John C. Roos
1937-7-22
2351
San Bernardino
San Bernardino Mountains
Comment
UCR24146
Lilium parryi
John C. Roos
1956-7-21
6590
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
CLARK-A1528-3810
Limonium sinuatum
John C. Roos
1949-10-1
4670
San Diego
Marsh
Comment
UCR19041
Limosella aquatica
John C. Roos
1937-7-19
1160
San Bernardino
San Bernardino Valley, [2 miles] south of San Bernardino
320
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
UC1043022
Linanthus aureus subsp. aureus
John and Lucille Roos
1952-5-17
5673
San Bernardino
Adelanto Mohave Desert
944
Comment
UCR27496
Linanthus breviculus
John C. Roos
1947-5-3
3654
Los Angeles
San Gabriel Mtns, Big Pines
1890
Comment
RSA85447
Linanthus dianthiflorus subsp. dianthiflorus
J. C. Roos
1952-4-13
5529
Riverside
Box Springs Mts.
488
Comment
CLARK-A1528-3477
Linanthus liniflorus
John C. Roos
1952-5-26
5712
Riverside
Reche Canyon
457
Comment
CLARK-A1528-3479
Linanthus nuttallii
John C. Roos, Lucille Roos
1951-8-8
5093
Inyo
White Mountains
3169
Comment
UCR24239
Linanthus orcuttii subsp. pacificus
John C. Roos
1937-6-18
1233
San Diego
Peninsular Range, Palomar Mountain
Comment
UCR25359
Linanthus parryae
John C. Roos, L. Roos
1952-5-10
5645
San Bernardino
Mojave Desert, Adelanto
915
Comment
RSA40584
Linanthus pungens
J. C. Roos
1947-7-13
2891
Inyo
Baldy Peak, PanamintMountains
Comment
POM302563
Linanthus pungens subsp. hookeri
J. C. Roos
1943-7-4
2723
San Bernardino
Greenspot, north base of Sugarloaf Mountains
Comment
POM301527
Linaria dalmatica
J. C. Roos
1937-6-19
2392
San Diego
Fallbrook.
Comment
UCR20389
Lithophragma affine
John C. Roos, L. Roos
1954-4-17
6067
Riverside
Canyon [1 mile] SE of [summit of] Reche Canyon
686
Comment
UCR25552
Lithophragma affine
John C. Roos
1941-4-19
168
Riverside
Peninsular Range, Loma Linda Hills/Box Springs Mtns.; plateau in Reche Canyon
671
Comment
POM265665
Lithophragma heterophyllum
J. C. Roos
1942-4-18
1083
Los Angeles
Santa Anita Canyon, San Gabriel Mts
Comment
CLARK-A1528-4108
Lithophragma tenellum
John C. Roos
1941-5-31
91
San Bernardino
San Bernardino Mountains
2285
Comment
CLARK-A1528-5560
Loeflingia squarrosa
John C. Roos
1937-7-14
501
San Bernardino
Comment
UCR18962
Loeflingia squarrosa
John C. Roos
1952-5-14
5664
Riverside
Perris-Aguanga Basin, 2 mi NW of Perris
Comment
CLARK-A1528-1437
Lomatium dissectum
John C. Roos
1956-5-26
6580
San Bernardino
San Bernardino Mountains
Comment
RSA264304
Lomatium dissectum var. multifidum
J. C. Roos
1937-5-9
658
San Bernardino
Oak Glen, San Bernardino Mountains.
Comment
UCR26276
Lomatium foeniculaceum
John C. Roos, A. R. Roos
1953-8-9
5964
Inyo
Inyo Mtns, upper Tamarack Canyon
3110
Comment
SEINET13944432
Lomatium foeniculaceum
J. C. Roos
1958-1
sn
Inyo
Near Badger Flat, Inyo mtns.
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
SEINET4310255
Lomatium foeniculaceum subsp. inyoense
J. C. Roos
1958-1
Inyo
Near Badger Flat, Inyo Mts., Inyo Co., Calif.
Comment
UC1018151
Lomatium foeniculaceum subsp. inyoense
John and Lucille Roos
1954-6-24
6149
Inyo
3 mi E of Badger Flat (crest of Inyo Mountains in headwaters of Marble Canyon watershed)
Comment
SEINET8465397
Lomatium foeniculaceum subsp. inyoense
J. C. Roos
1958-7-5
s.n.
Inyo
Near Badger Flat, Inyo Mtns.
Comment
CLARK-A1528-1439
Lomatium inyoense
John C. Roos
1959-8-23
Mono
White Mountains
Comment Read comments May 28 2014
RSA0076472
Lomatium parryi
John C. Roos
1949-6-21
4427
San Bernardino
Keystone Canyon, New York Mts.
1889
Comment
CLARK-A1528-1447
Lomatium utriculatum
John C. Roos
1952-2-29
5365
Riverside
Reche Canyon
426
Comment
CLARK-A1528-5070
Lotus crassifolius
John C. Roos
1940-5-18
835
San Bernardino
San Bernardino Mountains
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
CLARK-A1528-2813
Lotus nevadensis
John C. Roos
1965-6-26
San Bernardino
San Bernardino Mountains
Comment
UCR23902
Lotus nevadensis
John C. Roos
1947-6-27
3714
San Bernardino
San Bernardino Mtns., Glen Martin
1738
Comment
RSA331891
Lotus nuttallianus
J. C. Roos
1954-12-18
6268
San Diego
Encinitas
5
Comment
CLARK-A1528-998
Lotus oblongifolius
John C. Roos
1937-6-6
2011
San Bernardino
San Bernardino
304
Comment
RSA155738
Lotus oblongifolius
J. C. Roos, A. R. Roos
1955-8-28
6566
Inyo
On the West side of Owens Lake, 3 miles North of Olancha
1091
Comment
CLARK-A1528-5009
Lotus purshianus
John C. Roos
1937-6-7
2400
Riverside
San Jacinto
Comment
RSA662072
Lotus purshianus
J. C. Roos
1965-6-16
s.n.
Orange
Dana Point near Doheney Beach.
Comment
RSA659785
Lotus salsuginosus
J. C. Roos, L. Roos
1952-5-19
5694
Riverside
On hills north of Moreno.
Comment
UCR25958
Lotus salsuginosus var. salsuginosus
John C. Roos, L. Roos
1952-5-19
5694
Riverside
One year old burn on hills north of Moreno
518
Comment
UCR25550
Lotus scoparius var. brevialatus
John C. Roos
1941-4-25
163
Riverside
Plateau in Reche Canyon
Comment
CLARK-A1528-2808
Lotus strigosus
John C. Roos
1954-5-15
6120
Riverside
Reche Canyon
731
Comment
CLARK-A1528-2809
Lotus strigosus
John C. Roos
1937-3-24
1339
Riverside
Pigeon Pass
Comment
CLARK-A1528-5427
Lotus strigosus
John C. Roos
1947-2-22
3280
San Bernardino
San Bernardino Mountains
Comment
RSA85587
Lotus strigosus
J. C. Roos
1952-4-9
5479
Riverside
Fairmount Park
259
Comment
UCR22191
Lotus wrangelianus
John C. Roos
1952-4-9
5478
Riverside
Hill by Fairmont Park, Riverside
259
Comment
CLARK-A1528-666
Ludwigia peploides
John C. Roos
1951-9-25
5250
Riverside
Riverside
259
Comment
CLARK-A1528-3304
Ludwigia repens
John C. Roos
1965-9-15
San Bernardino
Victorville
Comment
CLARK-A1528-3305
Ludwigia repens
John C. Roos
1937-8-10
1043
Kern
Isabella
Comment
RSA662063
Lunaria annua
J. C. Roos
1966-5-14
s.n.
San Bernardino
Lytle Creek, San Bernardino Mtns,
Comment
RSA0016964
Lupinus albicaulis subsp. wolfianus
J. C. Roos
1937-8-10
2522
Kern
Valley 12 miles north of Caliente.
Comment
CLARK-A1528-2846
Lupinus alpestris
John C. Roos
1954-6-12
6133
Inyo
Panamint Mountains
2621
Comment
UCR20426
Lupinus argenteus var. meionanthus
John C. Roos
1947-7-13
2874
Inyo
Northern Mojave Desert, Panamint Mtns: Telescope Peak
3293
Comment
RSA71763
Lupinus argenteus var. tenellus
J. C. Roos
1951-8-8
5109
Inyo
North rim Reed flat, White Mts
3171
Comment Read comments Aug 22 2011
CLARK-A1528-2816
Lupinus arizonicus
John C. Roos
1947-2-15
3268
Riverside
Eagle Mountains
Comment
RSA450315
Lupinus bicolor
J. C. Roos
1966-3-22
s.n.
Riverside
Edgemont.
Comment
CAS-BOT-BC196829
Lupinus breweri var. grandiflorus
J. C. Roos
1965-7-18
s.n.
San Bernardino
Bear Valley, San Bernardino Mtns.
Comment
POM263079
Lupinus concinnus subsp. orcuttii
J. C. Roos
1937-4-23
685
San Bernardino
29 Palms, Mojave Desert
Comment
UCR23949
Lupinus concinnus subsp. orcuttii
John C. Roos
1955-3-28
6281
San Diego
Hills 10 mi. north of Escondido, Moosa Canyon near the dam, along Hwy 395
152
Comment
CLARK-A1528-2827
Lupinus densiflorus subsp. lacteus
John C. Roos
1937-4-17
1352
Riverside
San Timoteo Canyon
Comment
CLARK-A1528-2829
Lupinus excubitus
John C. Roos
1941-8-17
61
Inyo
Panamint Mountains
2651
Comment
UCSB42216
Lupinus excubitus
Roos, J.
1965-7-18
San Bernardino
Along Bear Valley; San Bernardino Mtns.
Comment
CAS-BOT-BC216704
Lupinus excubitus var. excubitus
J. C. Roos; A. C. Sanders
1965-7-18
s.n.
San Bernardino
Along Bear Valley, San Bernardino Mountains
Comment
CAS-BOT-BC216705
Lupinus excubitus var. excubitus
J. C. Roos; A. C. Sanders
1965-6-6
s.n.
San Bernardino
Mill Creek near Fallsvale, San Bernardino Mountains
Comment
CLARK-A1528-2836
Lupinus formosus
John C. Roos
1937-5-28
1704
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC202054
Lupinus holmgrenianus
J. C. Roos
1955-6-17
6407
Inyo
2 miles NE of Willow Spring, Last Chance Mountains
2011
Comment
GH369030
Lupinus holmgrenianus
J. C. Roos
1955-5-15
6374
Unknown
2 miles NE of Willow Spring, Last Chance Mts., almost on the Calif-Nevada State line
2042
Comment
RSA104826
Lupinus holmgrenianus
J. C. Roos
1955-5-15
6374
Inyo
2 miles NE of Willow Spring, Last Chance Mountains, almost on the CA/NV state line
2043
Comment
UCR23975
Lupinus horizontalis var. platypetalus
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment
RSA45494
Lupinus lepidus var. sellulus
J. C. Roos, L. Roos
1948-9-7
3991
Mono
Crestview.
Comment
CLARK-A1528-7810
Lupinus luteolus
John C. Roos
1948-8-31
3933
Lake
Clear Lake
Comment
CLARK-A1528-5071
Lupinus nanus
John C. Roos
1937-4-17
511
San Bernardino
Redlands
Comment
UCR23929
Lupinus shockleyi
John C. Roos
1955-6-19
6434
Inyo
Northern Mojave Desert, 1 mi. south of Willow Spring, Last Chance Mountains
1813
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-A1528-2853
Lupinus truncatus
John C. Roos
1938-4-4
730
Riverside
La Sierra
Comment
RSA450316
Lupinus truncatus
J. C. Roos
1948-4-24
3788
Riverside
Cabazon.
Comment Read comments Apr 3 2011
RSA450467
Lupinus truncatus
J. C. Roos
1966-4-5
s.n.
Riverside
Winchester.
Comment Read comments Mar 20 2011
RSA78233
Lupinus vallicola subsp. vallicola
J. C. Roos, Lucille Roos, A. R. Roos
1951-5-27
5052
Mariposa
About 8 miles east of Marposa.
1006
Comment
CLARK-A1528-4348
Lycium brevipes
John C. Roos
1949-3-19
4105
Riverside
Dos Palmas Spring
Comment
CLARK-A1528-3100
Lycopus americanus
John C. Roos
1952-8-6
5883
San Bernardino
San Bernardino
304
Comment
CLARK-A1528-5696
Lycopus americanus
John C. Roos
1952-8-6
5883
San Bernardino
San Bernardino
304
Comment
CLARK-A1528-1995
Machaeranthera canescens
John C. Roos
1937-7-22
1163
San Bernardino
San Gorgonio Wilderness
Comment
RSA335252
Machaeranthera canescens
J. C. Roos
1966-8-13
s.n.
Kern
Fish Creek, San Bernardino Mtns.
2317
Comment Read comments Mar 12 2014
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
RSA47474
Machaeranthera gracilis
J. C. Roos, L. Roos
1949-6-18
4393
San Bernardino
Mountain Pass, Clark Mountains
1524
Comment
CLARK-A1528-2185
Machaeranthera tephrodes
John C. Roos
1949-4-9
4215
San Bernardino
Colorado River
Comment
CLARK-A1528-2003
Machaeranthera tortifolia
John C. Roos
1949-4-10
4225
Riverside
Chuckwalla Mountains
Comment
UCR25294
Madia exigua
John C. Roos
1957-7-2
6649
Sonoma
Miller Ridge
Comment
RSA47305
Mahonia haematocarpa
L. Roos, John Roos
1949-6-22
4437
San Bernardino
Lecyr Well, New York Mts., in a sandy wash.
1524
Comment
POM263063
Malacothamnus davidsonii
J. C. Roos
1937-7-7
331
Los Angeles
Near San Fernando
Comment
RSA78379
Malacothamnus fremontii
J. C. Roos
1951-7-30
5072
Los Angeles
Big Rock Creek, San Gabriel Mts.
1677
Comment
CLARK-A1528-3234
Malacothamnus orbiculatus
John C. Roos
1948-6-21
3688
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC345425
Malacothrix clevelandii
John Roos; Lucille Roos
1954-5-15
6119
Riverside
Summit of Reche Canyon
731
Comment
UCR24138
Malacothrix clevelandii
John C. Roos
1950-4-22
4756
Riverside
0.3 mi NE of summit of Reche Canyon
762
Comment
UC1042990
Malosma laurina
John and Lucille Roos
1954-7-10
6191
Riverside
n. side Pigeon Pass; Box Springs Mts.
487
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
UCSB45543
Malva parviflora
Roos, John; Roos, Lucille
1951-5-5
Riverside
Fairmont Park, Riverside
Comment
POM265801
Malvella leprosa
J. C. Roos
1942-9-5
1744
Los Angeles
Westwood Village
Comment
CLARK-A1528-2789
Marah fabacea
John C. Roos
1950-7-19
4858
San Francisco
San Francisco
60
Comment
UCSB42176
Marah macrocarpa
Roos, John
1966-4-23
Riverside
Santa Ana Mtns., S of Corona
Comment
CAS-BOT-BC67842
Marsilea vestita
John C. Roos
1952-5-21
5704
Riverside
San Jacinto river bottomland 1 1/2 miles southeast of Perris
426
Comment
CLARK-A1528-5367
Marsilea vestita
John C. Roos
1965-6-30
Riverside
Perris
Comment
CLARK-A1528-3414
Meconella denticulata
John C. Roos
1942-5-23
1069
Los Angeles
San Gabriel Mountains
0
Comment
CLARK-A1528-2856
Medicago lupulina
John C. Roos
1952-4-30
5604
Riverside
March Air Force Base
487
Comment
POM266488
Melica aristata
J. C. Roos
1942-7-1
1255
Mariposa
Between Clouds Rest and Half Dome, Yosemite National Park.
2287
Comment
UC1023419
Melica aristata
John C. Roos
1950-8-12
4936
San Bernardino
Vivian Creek; San Bernardino Mts.
2225
Comment
UCR24033
Melica aristata
John C. Roos
1942-7-1
1255
Mariposa
Sierra Nevada Mtns., Yosemite National Park, between Cloud's Rest and Half Dome
2287
Comment
LA102174
Melica californica
John C. Roos;
1950-4-22
4754
Riverside
Reche Canyon, 0.5 mi NE of the summit
792
Comment Read comments Feb 23 2014
UCR30549
Melica californica
John C. Roos
1939-5-14
269
Napa
North Coast Range, Pacific Union College, Angwin
549
Comment
CLARK-A1528-4724
Melica frutescens
John C. Roos
1952-4-9
5492
Riverside
Riverside
396
Comment
CLARK-A1528-4730
Melica imperfecta
John C. Roos
1939-5-27
Riverside
Reche Canyon
Comment
LA102164
Melica imperfecta
John C. Roos;
1947-2-22
3285
San Bernardino
San Bernardino Mountains, Deep Creek, N side of the mountains
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
CAS-BOT-BC281056
Melica stricta
John Roos; Lucille Roos
1954-6-25
6154
Inyo
N end Badger Flat, Inyo Mts
2682
Comment
CLARK-A1528-4731
Melica stricta
John C. Roos
1942-7-1
1256
Mariposa
Yosemite National Park
Comment
RSA450060
Melica stricta
J. C. Roos
1963-6-15
s.n.
San Bernardino
Between Fish Creek and Heart Bar Creek
2195
Comment
UCR23996
Melica stricta
John C. Roos
1950-6-17
s.n.
San Bernardino
San Bernardino Mtns., north slope of Butler Peak
2134
Comment
RSA92082
Melica stricta
J. C. Roos
1954-6-25
6154
Inyo
Inyo Mountains; Badger Flat
Comment
RSA45542
Menodora scoparia
J. C. Roos
1948-9-18
4068
San Bernardino
N slopes Clark Mts, S og Green s Mine
1677
Comment
CLARK-A1528-3101
Mentha arvensis
John C. Roos
1940-7-21
1851
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-5349
Mentha citrata
John C. Roos
1951-9-25
5289
Riverside
Riverside
Comment
UCR18812
Mentha spicata
John C. Roos
1952-8-6
5881
Riverside
San Bernardino Valley, Riverside, W end of Fairmont Park
259
Comment
RSA301535
Mentha suaveolens
J. C. Roos
1937-8-2
2271
San Bernardino
irrigation ditch near Bryn Mawr, San Bernardino Valley, southern California
Comment
POM263282
Mentzelia congesta
J. C. Roos
1937-5-31
547
Los Angeles
Big Pines.
Comment
RSA44926
Mentzelia dispersa
J. C. Roos
1947-6-14
3676
San Bernardino
Crestline, San Bernardino Mts.
1585
Comment
CLARK-A1528-3164
Mentzelia gracilenta
John C. Roos
1937-3-25
543
Los Angeles
Lancaster
Comment
RSA265793
Mentzelia laevicaulis
J. C. Roos
1942-9-24
1740
Los Angeles
Gravel wash, Monrovia.
Comment
RSA449943
Mentzelia oreophila
J. C. Roos
1950-8-4
s.n.
San Bernardino
North side of Clark Mtn.
1220
Comment
UCR20352
Mentzelia oreophila
John C. Roos, A. R. Roos
1954-6-11
6125
Inyo
Northern Mojave Desert, Panamint Mountains, Wildrose Canyon
976
Comment
RSA0117768
Mentzelia oreophila
J. C. Roos, L. Roos
1949-5-29
4373
San Bernardino
N of Clark Mts, eastern Mojave Desert.
1220
Comment
CLARK-A1528-3444
Microsteris gracilis
John C. Roos
1966-4-9
San Bernardino
San Bernardino Mountains
2057
Comment
CLARK-A1528-3487
Microsteris gracilis
John C. Roos
1967-5-30
San Bernardino
San Bernardino Mountains
Comment
RSA449972
Microsteris gracilis subsp. gracilis
J. C. Roos
1966-4-9
6750
San Bernardino
North shore 2 miles east of Fawnskin, Bear Vally.
Comment Read comments Dec 15 2016
POM262903
Mimulus aurantiacus var. puniceus
J. C. Roos
1941-5-17
123
Riverside
About 4 miles SW of March Field.
Comment
CLARK-A1528-4229
Mimulus bigelovii
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-4233
Mimulus bigelovii
John C. Roos
1947-2-15
3260
Riverside
Hayfield
Comment
UCR27413
Mimulus bigelovii var. cuspidatus
John C. Roos
1967-8-6
s.n.
Inyo
Inyo Mtns., Mazourka Canyon
1386
Comment
CLARK-A1528-4243
Mimulus floribundus
John C. Roos
1937-5-10
2330
Riverside
Perris
Comment
RSA450075
Mimulus floribundus
J. C. Roos
1952-4-29
5595
Riverside
Pigeon, Box Springs Mts.
457
Comment Read comments May 21 2011
CLARK-A1528-4253
Mimulus guttatus
John C. Roos
1949-6-23
4472
San Bernardino
Mojave Desert
1462
Comment
POM263095
Mimulus johnstonii
J. C. Roos
1937-7-16
376
San Bernardino
San Gabriel Mountains: near Stockton Flats.
Comment
UCR19051
Mimulus nanus var. mephiticus
John C. Roos, L. Roos
1952-7-28
5846
Inyo
White Mtns, Wyman Canyon
2683
Comment
RSA47449
Mimulus parishii
J. C. Roos, Lucille Roos
1949-6-23
4471
San Bernardino
Near Rock Springs, Mid-hills, New York Mountains.
1463
Comment
RSA71708
Mimulus parryi
J. C. Roos, Roos
1952-7-31
5879
Inyo
NW of Cedar Flat, White Mountain
2439
Comment
RSA444807
Mimulus pilosus
J. C. Roos
1952-6-8
5745
Riverside
Common along damp sunny bank with Helianthus gracilentus, etc., summit of Reche Canyon near Ferndale school.
Comment
CLARK-A1528-4270
Mimulus puniceus
John C. Roos
1941-5-17
123
Riverside
March Field
Comment
CLARK-A1528-4271
Mimulus puniceus
John C. Roos
1966-4-29
Riverside
Lakeview
Comment
CLARK-A1528-4228
Mimulus rubellus
John C. Roos
1949-5-29
4377
San Bernardino
Clark Mountain
1676
Comment
RSA47197
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
UCR19109
Mirabilis albida
John C. Roos
1937-8-25
11
San Bernardino
Eastern Mojave Desert, Mountain Pass, south of Clark Mountain
1524
Comment
UCR26261
Mirabilis bigelovii
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-A1528-3278
Mirabilis californica
John C. Roos
1966-4-23
Riverside
Comment
RSA648014
Mirabilis froebelii
J. C. Roos
1965-7-11
s.n.
Inyo
Wildrose Canyon. Panamint Mtns.
Comment
CAS-BOT-BC384085
Mirabilis laevis var. villosa
J. C. Roos
1966-3-26
s.n.
Riverside
2 miles S.E. of Desert Center
Comment
CLARK-A1528-7850
Mirabilis laevis var. villosa
John C. Roos
1949-4-8
4182
Imperial
Chocolate Mountains
Comment
RSA45521
Mirabilis laevis var. villosa
J. C. Roos, L. Roos
1949-4-8
4182
Imperial
Chocolate Mountains, along wash east end of mountains.
Comment
CLARK-A1528-1380
Mollugo verticillata
John C. Roos
1939-6-21
920
Los Angeles
Pasadena
Comment
POM265641
Mollugo verticillata
J. C. Roos
1939-6-22
920
Los Angeles
East Walnut and Foothill Extension, Pasadena
Comment
CLARK-A1528-3177
Monardella lanceolata
John C. Roos
1940-8-10
1553
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3144
Monardella linoides
John C. Roos
1960-7-4
Mono
White Mountains
Comment
CLARK-A1528-3145
Monardella linoides
John C. Roos
1956-8-29
6593
Inyo
Panamint Mountains
Comment
CLARK-A1528-3179
Monardella macrantha subsp. hallii
John C. Roos
1962-6-30
Riverside
Santa Ana Mountains
Comment
UCR25682
Monardella odoratissima
John C. Roos, A. R. Roos
1953-8-9
5951
Inyo
Inyo Mtns, Tamarack Canyon
2744
Comment
CLARK-A1528-4884
Monardella odoratissima subsp. australis
John C. Roos
1937-7-20
1177
San Bernardino
San Bernardino Mountains
Comment
UC2035934
Monardella odoratissima subsp. glauca
J. C. and A. R. Roos
1953-8-9
5951
Inyo
Tamarack Canyon Inyo Mts.
3078
Comment
CLARK-A1528-3154
Monardella villosa
John C. Roos
1950-7-22
4868
Sonoma
Jenner
30
Comment
UCR19138
Monardella viridis
John C. Roos
1948-8-31
3934
Lake
North Coast Range, mountains southwest of Lakeport
610
Comment
CLARK-A1528-2589
Monolepis nuttalliana
John C. Roos
1954-3-25
6047
San Bernardino
Mojave Desert
Comment
UCR24216
Monolepis nuttalliana
John C. Roos
1946-9-21
3081
San Bernardino
San Bernardino Mtns, Baldwin Lake
Comment
CLARK-A1528-2588
Monolepis nuttalliana
John C. Roos
1938-4-18
1638
San Bernardino
Cronise Lake
Comment
UCR19021
Monolepis spathulata
John C. Roos
1937-7-23
1986
San Bernardino
San Bernardino Mtns., Big Meadows at Heart Bar State Park.
2073
Comment
CAS-BOT-BC444697
Montia chamissoi
John Roos; Lucille Roos
1951-8-10
5133
Mono
McAfee Meadow, White Mts.
3657
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
UCR23994
Muhlenbergia andina
John C. Roos
1962-9-29
s.n.
San Bernardino
San Bernardino Mtns, Mill Creek
2043
Comment
CLARK-A1528-76
Muhlenbergia asperifolia
John C. Roos
1951-9-25
5257
Riverside
Riverside
259
Comment
RSA153098A
Muhlenbergia asperifolia
J. C. Roos
1955-7-23
6514
Inyo
Beveridge Canyon, E base of Mtns, Saline Valley
640
Comment
RSA648069
Muhlenbergia asperifolia
J. C. Roos
1946-9-14
3002
Riverside
Dos Palmas Springs east of Asbestos Mt.
1066
Comment
RSA69814
Muhlenbergia asperifolia
J. C. Roos
1951-9-25
5257
Riverside
West end Fairmount Park
259
Comment
UC1117445
Muhlenbergia asperifolia
J. C. Roos
1955-7-23
6514
Inyo
along small stream east base Inyo Mountains, Saline Valley, Beveridge Canyon
640
Comment
CAS-BOT-BC262697
Muhlenbergia californica
John C. Roos
1951-7-30
5075
Los Angeles
Big Rock Creek, north of Mt. Baden Powell, San Gabriel Mts.
1981
Comment
CLARK-A1528-4750
Muhlenbergia californica
John C. Roos
1946-8-31
2927
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4751
Muhlenbergia filiformis
John C. Roos
1939-6-3
721
San Bernardino
Santa Ana River
Comment
POM263003
Muhlenbergia filiformis
J. C. Roos
1939-6-3
721
San Bernardino
South Fork Santa Ana
2043
Comment
POM265765
Muhlenbergia microsperma
J. C. Roos
2081
Orange
East of San Juan Capistrano
Comment
CLARK-A1528-4760
Muhlenbergia porteri
John C. Roos, Alfred R. Roos
1950-8-4
4889
San Bernardino
Clark Mountain
1219
Comment
GH355759
Muhlenbergia porteri
J. C. Roos
1955-5-13
6341
Unknown
west base of Last Chance Mts., east of Eureka Valley sand dunes.
1219
Comment
UC1023409
Muhlenbergia porteri
J. C. and A. R. Roos
1950-8-4
4889
San Bernardino
north slopes of mts. eastern Mojave Desert, Clark Mts.
1219
Comment
UC1117461
Muhlenbergia porteri
J. C. and A. R. Roos
1955-8-23
6534
Inyo
e Eureka Valley sand dunes; west base Last Chance Mts.
1219
Comment
CLARK-A1528-4762
Muhlenbergia richardsonis
Alfred R. Roos
1937-8-19
10679
Riverside
San Jacinto Mountains
Comment
UCR20479
Muhlenbergia richardsonis
John C. Roos
1950-8-12
4934
San Bernardino
San Bernardino Mtns., Vivian Creek
2195
Comment
UCR26143
Myosurus apetalus
John C. Roos
1959-5-16
s.n.
San Bernardino
San Bernardino Mtns., Holcomb Valley Camp
2256
Comment
UCR20438
Myosurus minimus subsp. apus
John C. Roos
1952-4-9
5515
Riverside
Rolling flats at Edgemont, near Box Springs
488
Comment
CLARK-A1528-2980
Nama demissa
John C. Roos
1947-3-15
3355
Riverside
Santa Rosa Mountains
365
Comment
CLARK-A1528-2981
Nama hispida
John C. Roos
1949-4-9
4221
San Bernardino
Vidal 15' quadrangle
Comment
UCR26301
Nama hispida
John C. Roos, Lucille Roos
1949-4-9
4221
San Bernardino
Mojave / Sonoran (Colorado) Desert, east of the road junction [Vidal Junction], 6 mi. north of Vidal
284
Comment
UCR26302
Nama hispida
John C. Roos
1949-4-8
4197
Imperial
Sonoran (Colorado) Desert, Milpitas Wash.
Comment
CLARK-A1528-2982
Nama rothrockii
John C. Roos
1937-7-28
San Bernardino
San Bernardino Mountains
Comment
POM263110
Nassella cernua
J. C. Roos
1937-5-10
430
Riverside
Perris
Comment
CLARK-A1528-3445
Navarretia atractyloides
John C. Roos
1948-6-13
3878
San Bernardino
Fontana
Comment
UCR30590
Navarretia heterodoxa
John C. Roos
1950-7-22
4877
Sonoma
North Coast Range, 2 miles east of Duncan Mills
61
Comment
UCR30586
Navarretia intertexta
John C. Roos
1950-7-22
4876
Sonoma
North Coast Range, 2 miles east of Duncan Mills
61
Comment
UCR30591
Navarretia squarrosa
John C. Roos
1950-7-22
4878
Sonoma
North Coast Range, 2 miles east of Duncan Mills
61
Comment
POM251785
Nemacladus californicus
J. C. Roos
1937-5-25
21
San Bernardino
Kramer Junction
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
UCSB45605
Nemacladus glanduliferus
Roos, Lucille; Roos, John
1952-5-10
San Bernardino
Kremer Hills, Mojave Desert
853
Comment
CLARK-A1528-2372
Nemacladus gracilis
John C. Roos
1937-5-30
1976
San Bernardino
Comment
CLARK-A1528-3748
Nemacladus rubescens
John C. Roos
1937-4-25
1793
San Bernardino
Essex
Comment
CLARK-A1528-3749
Nemacladus rubescens
John C. Roos
1937-4-24
1797
San Bernardino
San Bernardino Mountains
Comment
UCR25418
Nemacladus rubescens
John C. Roos, L. Roos
1952-5-10
5636
San Bernardino
Western Mojave Desert, 4 mi. northwest of Adelanto, near Red Raven Mine
823
Comment
POM264589
Nemophila menziesii var. menziesii
J. C. Roos
1939-3-31
309
Napa
Angwin. Howell Mtns.
Comment
RSA425014
Nemophila pedunculata
J. C. Roos
1950-6-24
4837
San Bernardino
Moonridge, Bear Valley, San Bernardino Mtns.
2226
Comment
CLARK-A1528-3078
Nicolletia occidentalis
John C. Roos
1950-10-21
5017
San Bernardino
Little San Bernardino Mountains
914
Comment
CLARK-A1528-5113
Nicotiana glauca
John C. Roos
1942-9-20
1746
Los Angeles
West Los Angeles
Comment
CAS-BOT-BC110329
Nitrophila mohavensis
John Roos; Lucille Roos
1954-9-14
6234
Inyo
Amargosa Desert 3 miles northeast of Death Valley Junction along Ash Meadows road.
624
Comment
CAS-BOT-BC110333
Nitrophila mohavensis
J. C. Roos; A. R. Roos
1954-6-13
6140
Inyo
Amargosa Desert 3 miles northeast of Death Valley Junction along Ash Meadows road.
624
Comment
NY324360
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
RSA89525
Nitrophila mohavensis
J. C. Roos
1954-9-14
6234
Inyo
Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road
625
Comment
RSA89533
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
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
UCR24312
Nitrophila mohavensis
John C. Roos
1954-7-18
6194
Inyo
Northern Mojave Desert, Death Valley region, Amargosa Desert 3 mi. NE of Death Valley Junction, along Ash Meadows road
625
Comment
RSA0002414
Nitrophila mohavensis
J. C. Roos, A. Roos
1954-6-13
6140
Inyo
Open flats of Amargosa Desert 3 mi. NE of Death Valley Junction along Ash Meadow road.
625
Comment
CLARK-A1528-1185
Nitrophila occidentalis
John C. Roos
1937-8-9
1957
Inyo
Little Lake
Comment
CLARK-A1528-4923
Nitrophila occidentalis
John C. Roos
1937-5-30
2044
San Bernardino
Victorville
Comment
CLARK-A1528-2596
Nitrophila occidentalis
John C. Roos
1965-7-11
Inyo
Death Valley Junction
Comment
UCR26306
Nolina bigelovii
John C. Roos
1948-5-15
3852
Riverside
Sonoran (Colorado) Desert, Eagle Mtns., Lost Palms Canyon
Comment
RSA78225
Nolina parryi
J. C. Roos, L. Roos
1952-10-18
5904
Riverside
Hidden Valley Campground
1220
Comment
RSA40561
Notholaena californica subsp. leucophylla
J. C. Roos
1946-11-23
3160
Los Angeles
Placerita canyon, east of Newhall
Comment
CLARK-A1528-3568
Notholaena sinuata var. cochisensis
John C. Roos
1949-5-29
3532
San Bernardino
Clark Mountain
1462
Comment
RSA155651
Oenothera avita subsp. avita
J. C. Roos
1955-6-17
6395
Inyo
2 miles NE of Willow Springs, Last Chance Mountains.
2012
Comment
RSA47544
Oenothera avita subsp. avita
J. C. Roos, L. Roos
1949-6-22
4450
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
UC1043029
Oenothera californica subsp. californica
John and Lucille Roos
1952-5-9
5625
San Bernardino
near Santa Ana River; Colton
274
Comment
RSA261210
Oenothera cespitosa subsp. crinita
J. C. Roos
1941-8-17
24
Inyo
Telescope peak, Panamint Mts.
3354
Comment
RSA40570
Oenothera cespitosa subsp. marginata
J. C. Roos
1947-4-5
3427
Riverside
North base Santa Rosa Mountains, upper reaches of Deep canyon.
Comment
GH367848
Oenothera deltoides subsp. eurekensis
J. C. Roos
1955-5-13
6356
Unknown
southeast end Eureka Valley
944
Comment
UCR23497
Oenothera deltoides subsp. eurekensis
John C. Roos
1955-5-13
6356
Inyo
Northern Mojave Desert, SE end of Eureka Valley
945
Comment
CLARK-A1528-3351
Oenothera hookeri
John C. Roos
1946-10-5
3106
San Bernardino
San Bernardino Mountains
1356
Comment
CLARK-A1528-2863
Olneya tesota
John C. Roos
1965-12-4
Riverside
Colorado Desert
365
Comment
RSA444475
Olneya tesota
J. C. Roos
1965-12-4
s.n.
Riverside
2 miles SE of Desert Center.
366
Comment
UCR25259
Oreonana vestita
John C. Roos
1946-9-15
3037
San Bernardino
San Bernardino Mtns., San Gorgonio ridge
3293
Comment
UCR19155
Orobanche bulbosa
John C. Roos
1937-7-4
1611
Santa Barbara
Upper Cuyama Valley, along border of San Luis Obispo County
Comment
UCR25290
Orobanche fasciculata
John C. Roos
1967-5-20
s.n.
San Bernardino
San Bernardino Mtns., Deep Creek
Comment
UCR25313
Orobanche fasciculata
John C. Roos
1965-7-10
s.n.
Inyo
Northern Mojave Desert, Panamint Mountains, Arcane Meadows, near Telescope Peak
3018
Comment
RSA0081038
Orobanche fasciculata
John C. Roos
1947-7-12
2880
Inyo
Upper Wildrose Canyon, Panamint Mountains.
2377
Comment
RSA0087206
Orobanche fasciculata
John Roos, Lucille Roos
1952-7-30
5867
Mono
Along Crooked Creek, White Mts.
2865
Comment
RSA0066490
Orobanche parishii
John C. Roos
1937-7-4
1611
Santa Barbara
Upper Cuyama Valley, near Wagy Ranch.
Comment
RSA0059342
Orobanche vallicola
John C. Roos
1937-7-5
1781
Ventura
Upper Sespe Creek.
Comment
CLARK-A1528-5740
Orthocarpus
John C. Roos
1937-7-2
469 b
Santa Barbara
Comment
CLARK-A1528-4280
Orthocarpus attenuatus
John C. Roos
1937-6-14
4
San Diego
Comment
CLARK-A1528-4281
Orthocarpus hispidus
John C. Roos
1940-7-16
1848
San Bernardino
San Bernardino Mountains
Comment
RSA262974
Orthocarpus purpurascens
J. C. Roos
1941-4-19
172
San Bernardino
Reche Canyon.
Comment
CLARK-A1528-4773
Oryzopsis bloomeri
John C. Roos, Lucille Roos
1951-7-28
5067
San Bernardino
Rathbone Creek
2560
Comment
CLARK-A1528-1449
Osmorhiza brachypoda
John C. Roos
1937-5-9
1683
San Bernardino
Oak Glen
Comment
CLARK-A1528-3925
Oxalis albicans subsp. pilosa
John C. Roos
1937-9-2
520
Los Angeles
Redondo Beach
Comment
CLARK-A1528-3397
Oxalis corniculata
John C. Roos
1949-11-18
4697
San Bernardino
Loma Linda Hills
335
Comment
RSA77257
Oxyria digyna
J. C. Roos, L. Roos
1951-8-10
5150
Mono
Flats 1 mile SE of White Mountain Peak, White Mountains.
4024
Comment
RSA659598
Oxystylis lutea
J. C. Roos
1965-7-11
s.n.
Inyo
Amargosa River at Eagle Mountain, south of Death Valley Junction.
610
Comment
CLARK-A1528-4869
Oxystylis lutea
John C. Roos
1949-6-28
4526
Inyo
Tecopa
Comment
CAS-BOT-BC413264
Oxytheca dendroidea subsp. dendroidea
J. C. Roos
1955-7-23
6504
Inyo
Soldier Flat, east base Waucoba Mountain, Inyo Mountains
2194
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
RSA92760
Oxytheca dendroidea subsp. dendroidea
J. C. Roos, A. R. Roos
1954-8-15
6227
Inyo
Whipoorwill (or Soldier) Flat, east side Waucoba Mtn., Inyo Mountains.
2195
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
CLARK-A1528-3758
Oxytheca parishii
John C. Roos
1965-10-2
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC216561
Oxytropis borealis var. australis
J. C. Roos; A. R. Roos
1955-8-26
6557
Inyo
Summit Waucoba Mountain, Inyo Mountains
3383
Comment
UC1234664
Oxytropis borealis var. australis
J. C. and A. R. Roos
1955-8-26
6557
Inyo
summit Waucoba Mt.; Inyo Mtns.
3383
Comment
RSA47472
Packera multilobata
J. C. Roos
1949-5-28
4350
San Bernardino
north side Clark Mtn.
1890
Comment
UC1494276
Packera multilobata
J. C. Roos
1949-6-24
4487
San Bernardino
summit Clark Mountain (eastern Mojave Desert); , summit of Clark Mtn.
2407
Comment
CLARK-A1528-1258
Panicum capillare
John C. Roos
1951-9-25
5255
Riverside
Riverside
259
Comment
CLARK-A1528-4783
Panicum capillare
John C. Roos
1937-7-19
377
San Bernardino
Santa Ana River
Comment
UCR25460
Panicum capillare
John C. Roos
1963-8-18
s.n.
San Bernardino
San Bernardino Valley, Residential garden in Loma Linda
335
Comment
CLARK-A1528-80
Panicum capillare var. occidentale
John C. Roos
1951-9-25
5255
Riverside
Riverside
259
Comment
CLARK-A1528-4392
Parietaria floridana
John C. Roos
1959-3-19
5401
Riverside
Box Springs Mountains
396
Comment
CLARK-A1528-82
Paspalum dilatatum
John C. Roos
1951-9-20
5231
San Bernardino
Loma Linda
335
Comment
POM301692
Paspalum dilatatum
J. C. Roos
1942-6-20
990
Orange
Anaheim, Telegraph Road, east of Los Angeles
Comment
RSA648017
Paspalum dilatatum
J. C. Roos
1936-10-13
1533
Orange
Costa Mesa near Santa Ana.
Comment
RSA69815
Paspalum dilatatum
J. C. Roos
1951-9-25
5262
Riverside
West end Fairmount Park
259
Comment
CLARK-A1528-2019
Pectis papposa
John C. Roos
1937-8-22
1212
Riverside
Comment
CLARK-A1528-2247
Pectocarya heterocarpa
John C. Roos
1966-3-20
Riverside
Comment
CLARK-A1528-2249
Pectocarya linearis
John C. Roos
1952-2-29
5371
Riverside
Reche Canyon
457
Comment
UCR18795
Pectocarya linearis
John C. Roos
1948-4-10
3785
San Bernardino
San Bernardino Valley, SW of Loma Linda
Comment
CLARK-A1528-1238
Pedicularis densiflora
John C. Roos
1957-3-15
6609
Ventura
Newbury Park
Comment
NY802603
Pediomelum castoreum
J. C. Roos
1952-5-10
5642
San Bernardino
4 miles northwest of Adelanto, near Red Haven Mine
823
Comment
UCR23343
Pellaea mucronata
John C. Roos
1947-3-8
3310
San Bernardino
San Bernardino Mountains, Deep Creek
1159
Comment
RSA85120
Pellaea mucronata var. mucronata
J. C. Roos
1952-5-7
5616
Riverside
Box Springs Mountains, north of Canyon Crest Heights
457
Comment
CLARK-A1528-4294
Penstemon bridgesii
John C. Roos
1952-7-28
5848
Inyo
White Mountains
2743
Comment
CLARK-A1528-4295
Penstemon bridgesii
John C. Roos
1941-8-17
65
Inyo
Panamint Mountains
2377
Comment
UCR24457
Penstemon caesius
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
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
RSA92432
Penstemon calcareus
J. C. Roos
1954-5-8
6102
Inyo
Titus Canyon, Grapevine Mountains
1311
Comment
UCR24493
Penstemon eatonii
John C. Roos
1937-7-28
1945
San Bernardino
San Bernardino Mtns, Van Deusen Canyon [Caribou Creek], near Bear Valley
2195
Comment
CAS-BOT-BC265428
Penstemon floridus
John Roos; Lucille Roos
1951-8-7
5084
Inyo
W side of Westgard Pass, White Mountains
2133
Comment
RSA92171
Penstemon floridus var. austinii
J. C. Roos, L. Roos
1954-6-26
6163
Inyo
Inyo Mountains, Mazourka Canyon.
2439
Comment
NY593823
Penstemon floridus var. austinii
J. C. Roos
1954-6-26
6163
Inyo
Upper Mazourka Canyon, Inyo Mountains.
2438.4
Comment
CLARK-A1528-4303
Penstemon grinnellii
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
Comment
UCR19056
Penstemon grinnellii
John C. Roos
1965-7-17
s.n.
San Bernardino
San Bernardino Mtns, Kilpecker Creek
Comment
POM263245
Penstemon heterophyllus
J. C. Roos
1937-6-15
631
San Diego
Near Cuyamaca Lake, Cuyamaca Mountains.
Comment
CLARK-A1528-1218
Penstemon heterophyllus subsp. australis
John C. Roos
1937-6-2
1988
San Bernardino
Yucaipa
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
RSA659604
Penstemon laetus subsp. sagittatus
J. C. Roos
1948-9-2
3974
Siskiyou
6 miles SW of Yreka.
Comment
UCR25128
Penstemon newberryi
John C. Roos
1942-6-25
1263
Mariposa
Sierra Nevada Mtns., Yosemite National Park, top of Half Dome
2683
Comment
RSA44887
Penstemon roezlii
J. C. Roos
1948-9-2
3947
Siskiyou
6 miles SW of Yreka.
Comment
NY650664
Penstemon rostriflorus
J. C. Roos
1952-7-28
5848
Inyo
Wyman Canyon, White Mountains
2743.2
Comment
CLARK-A1528-1217
Penstemon scapoides
John C. Roos
1967-8-5
Inyo
Inyo Mountains
3200
Comment
GH367548
Penstemon scapoides
J. C. Roos & L. Roos
1951-8-9
5122
Unknown
east side Reed Flat, White Mts.
3048
Comment Read comments Nov 7 2017
NY651577
Penstemon scapoides
J. C. Roos
1953-8-8
5936
Inyo
Hill behind Blue Bell Mine, Badger Flat, Inyo Mountains
2743.2
Comment
UC1010185
Penstemon scapoides
John and Lucille Roos
1951-8-9
5122
Inyo
e side Reed Flat , e side Reed Flat (White Mts.)
3048
Comment
UC1234847
Penstemon speciosus
J. C. Roos
1955-6-17
6402
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment
CLARK-A1528-4318
Penstemon spectabilis
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
HSC78589
Pericome caudata
J. C. Roos
1956-8-29
6595
Inyo
Head of Death Valley Canyon, Panamint Mtns.
Comment
UC1494260
Pericome caudata
J. C. Roos
1956-8-29
6595
Inyo
Death Valley Canyon, at the head Panamint Mtns.
Comment
UCR24126
Pericome caudata
John C. Roos
1956-8-29
6595
Inyo
Northern Mojave Desert, Panamint Mountains, head of Death Valley Canyon
2300
Comment
CAS-BOT-BC423276
Peritoma lutea
J. C. Roos
1955-6-21
6464
Inyo
Near Willow Spring, Last Chance Mountains.
1828
Comment
CAS-BOT-BC330358
Perityle megalocephala var. megalocephala
J. C. Roos; A. R. Roos
1954-8-14
6217
Inyo
The Narrows, Marble Canyon, Inyo Mts.
2179
Comment
CAS-BOT-BC330359
Perityle megalocephala var. megalocephala
J. C. Roos; A. R. Roos
1954-9-19
20169
Inyo
Head of Marble Canyon, The Narrows, Inyo Mts.
2225
Comment
UCSB42133
Persicaria lapathifolia
Roos, John
1965-9-15
San Bernardino
Mohave River at Victorville.
Comment
UCR19121
Petalonyx linearis
John C. Roos, Lucille Roos
1949-4-6
4143
Riverside
Sonoran (Colorado) Desert, Canyon in the Orocopia Mountains, 2.5 mi. NE of Dos Palmas Spring
152
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
CAS-BOT-BC167710
Petalonyx nitidus
John Roos; Lucille Roos
1954-6-28
6169
Inyo
Loretto Road, west side Eureka Valley
1676
Comment
UCR19126
Petalonyx thurberi
John C. Roos
1965-6-23
s.n.
Riverside
Sonoran (Colorado) Desert, Eagle Mtns, Lost Palms Wash
Comment
RSA79659
Petradoria discoidea
J. C. Roos
1953-8-9
5945
Inyo
Tamarack Canyon, Inyo Mts.
2682
Comment
CLARK-A1528-2026
Petradoria pumila
John C. Roos
1949-6-22
4446
San Bernardino
New York Mountains
Comment
CLARK-A1528-4013
Petrophytum caespitosum
John C. Roos
1948-9-18
4043
San Bernardino
Clark Mountain
Comment
RSA157867
Petrophytum caespitosum
J. C. Roos, A. R. Roos
1955-8-26
6550
Inyo
Canyon on east side of saddle between Squaw Peak and Waucoda Mt. Inyo mts.
2683
Comment
UCR18906
Petrophytum caespitosum
John C. Roos
1948-9-18
4043
San Bernardino
Eastern Mojave Desert, Clark Mountain
1982
Comment
RSA450435
Petrophytum caespitosum subsp. acuminatum
J. C. Roos
1948-9-18
4043
San Bernardino
Clark Mountain.
1982
Comment
UC1234854
Petrophytum caespitosum subsp. caespitosum
J. C. and A. R. Roos
1955-8-26
6550
Inyo
canyon e side of saddle between Squaw Peak and Waucoba Mt; Inyo Mts
2682
Comment
POM301542
Petunia parviflora
J. C. Roos
1937-8-30
2559
San Diego
Otay
Comment
RSA425012
Petunia parviflora
J. C. Roos
1952-5-28
5728
Riverside
San Jacinto River bottomland 1 mile south-east of Perris.
427
Comment
CLARK-A1528-5436
Phacelia crenulata
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-3002
Phacelia curvipes
John C. Roos
1965-6-26
San Bernardino
San Bernardino Mountains
Comment
RSA105043
Phacelia distans
J. C. Roos
1955-5-15
6367
Inyo
Last Chance Mountains: 0.5 miles west of Willow Springs.
1768
Comment
RSA155670
Phacelia fremontii
J. C. Roos
1955-6-17
6412
Inyo
2 miles NE of Willow Springs, Last Chance Mountains.
2012
Comment
UCR26292
Phacelia fremontii
John C. Roos
1950-4-26
4766
San Bernardino
Mojave Desert, Rabbit Springs, north of Lucerne Valley
884
Comment
CLARK-A1528-5136
Phacelia lemmonii
John C. Roos
1937-5-31
675
Los Angeles
San Gabriel Mountains
Comment
RSA47201
Phacelia lemmonii
J. C. Roos
1949-6-20
4422
San Bernardino
Keystone Canyon, New York Mts
1738
Comment
RSA425017
Phacelia parryi
J. C. Roos
1962-4-7
s.n.
San Diego
Moosa Canyon near Bonsall.
Comment Read comments Aug 8 2014
CLARK-A1528-5080
Phacelia parryi
John C. Roos
1941-4-25
161
San Bernardino
San Bernardino
Comment
CLARK-A1528-5081
Phacelia pedicellata
John C. Roos
1937-4-27
677
San Bernardino
457
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
UCR26271
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
RSA104825
Phacelia perityloides
J. C. Roos
1955-5-13
6331
Inyo
West base Last Chance Mountains, east of Eureka Valley sand dunes
1220
Comment
CAS-BOT-BC154420
Phacelia ramosissima var. latifolia
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
304
Comment
RSA425018
Phacelia ramosissima var. latifolia
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
305
Comment
UCR18847
Phacelia rotundifolia
John C. Roos, L. Roos
1952-7-31
5878
Inyo
NW of Cedar Flat, White Mtns
2439
Comment
CLARK-A1528-5108
Phacelia tanacetifolia
John C. Roos
1937-3-26
681
Kern
152
Comment
CLARK-A1528-5109
Phacelia viscida
John C. Roos
1937-7-7
404
Los Angeles
La Crescenta
478
Comment
RSA443395
Phalaris aquatica
J. C. Roos
1962-6-30
s.n.
Riverside
Head of Tin Mine Canyon
Comment
CLARK-A1528-4797
Phalaris lemmonii
John C. Roos
1966-3-24
Riverside
Winchester
Comment
LA102175
Phalaris lemmonii
John C. Roos;
1966-3-24
sn
Riverside
Winchester (near Hemet)
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
CLARK-A1528-4803
Phalaris minor
John C. Roos
1952-4-21
5564
San Bernardino
Loma Linda
304
Comment
CLARK-A1528-4798
Phalaris paradoxa
John C. Roos
1943-4-3
2616
Riverside
San Timoteo Canyon
457
Comment
CLARK-A1528-4799
Phalaris paradoxa
John C. Roos
1952-5-21
5702
Riverside
San Jacinto River
426
Comment
POM301697
Phalaris paradoxa
J. C. Roos
1940-6-10
1912
Sacramento
West of Sacramento
Comment
UCR24038
Phalaris paradoxa
John C. Roos
1940-6-10
1912
Sacramento
Sacramento Valley, lowlands west of Sacramento
4
Comment
RSA0057817
Philadelphus microphyllus var. stramineus
J. C. Roos, L. Roos
1952-7-28
5843
Inyo
Wyman Canyon, White Mountains.
2683
Comment
CLARK-A1528-4806
Phleum pratense
John C. Roos
1946-10-5
3110
San Bernardino
San Bernardino Mountains
1356
Comment
RSA443400
Phleum pratense
J. C. Roos
1965-8-18
s.n.
San Bernardino
Moonridge, Bear Valley
Comment
SEINET956212
Phlox condensata
J. C. Roos
1949-1
4580
San Bernardino
Holcomb Valley, San Bernardino Mountains.
2195
Comment
CLARK-A1528-3454
Phlox stansburyi
John C. Roos, Lucille Roos
1952-7-27
5837
Inyo
White Mountains
Comment
UCR27544
Phlox viridis
John C. Roos
1947-4-20
3580
Inyo
Northern Mojave Desert, Panamint Mountains near Telescope Peak, Wildrose Canyon
1585
Comment
CLARK-A1528-3020
Pholistoma auritum
John C. Roos
1937-3-26
1331
Santa Barbara
Comment
RSA92573
Pholistoma racemosum
J. C. Roos, L. Roos
1954-4-10
6060
San Diego
San Pasqual
152
Comment
POM263080
Phoradendron californicum
J. C. Roos
1937-4-26
523
San Bernardino
Twenty-nine Palms
Comment
LA102181
Phragmites australis
John C. Roos;
1950-8-7
sn
Inyo
Mojave Desert, China ranch on the Amargosa River S of Tecopa
426
Comment
CLARK-A1528-4967
Phyllodoce breweri
John C. Roos
1941-6-5
109
San Bernardino
Mount San Gorgonio
2895
Comment
CLARK-A1528-4427
Phyllospadix torreyi
John C. Roos
1960-8-27
Orange
Dana Point
Comment
CLARK-A1528-4358
Physalis acutifolia
John C. Roos
1937-6-9
1439
Imperial
Westmorland
Comment
CLARK-A1528-890
Physalis acutifolia
John C. Roos
1951-9-25
5263
Riverside
Riverside
259
Comment
POM262872
Physalis philadelphica
J. C. Roos
1940-10-26
220
San Bernardino
Loma Linda.
Comment
CAS-BOT-BC60709
Physaria kingii subsp. kingii
John Roos; Lucille Roos
1952-7-26
5821
Inyo
East side Reed Flat, White Mountains.
3048
Comment
RSA659184
Physocarpus alternans
J. C. Roos
1965-7-10
s.n.
Inyo
Eagle Springs, Panamint Mtns.
Comment
CLARK-A1528-3841
Pilostyles thurberi
John C. Roos
1963-6-1
Imperial
Comment
CLARK-A1528-3575
Pinus attenuata
John C. Roos
1948-1-31
3767
San Bernardino
San Bernardino Mountains
Comment
UCR19216
Pinus balfouriana
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mtns., Onion Valley, Independence Creek
Comment
CLARK-A1528-3547
Pinus coulteri
John C. Roos
1948-6-19
3884
Riverside
San Jacinto Mountains
1981
Comment
CLARK-A1528-3585
Pinus coulteri
John C. Roos
1942-6-20
1281
Riverside
San Jacinto Mountains
Comment
POM262953
Pinus coulteri
J. C. Roos
1936-5-3
700
San Diego
Near Julian.
Comment
RSA47301
Pinus edulis
J. C. Roos, Lucille Roos
1949-6-21
4424
San Bernardino
New York Peak.
2134
Comment
CLARK-A1528-3549
Pinus flexilis
John C. Roos
1947-7-13
2818
Inyo
Panamint Mountains
3352
Comment
UC1010340
Pinus flexilis
J. C. and A. R. Roos
1953-8-9
5972
Inyo
Tamarack Canyon Inyo Mts., Tamarack Canyon
2865
Comment
CLARK-A1528-3627
Pinus longaeva
John C. Roos, Lucille Roos
1947-7-13
2819
Inyo
Panamint Mountains
3322
Comment
UC1029606
Pinus longaeva
J. C. and A. R. Roos
1953-8-9
5956
Inyo
Tamarck Canyon Inyo Mountains (upper end)
3048
Comment
UCR19273
Pinus longaeva
John C. Roos
1959-8-23
s.n.
Mono
White Mtns., Cottonwood Creek.
3049
Comment
CLARK-A1528-3557
Pinus monophylla
John C. Roos
1947-4-5
3435
Riverside
San Jacinto Mountains
1310
Comment
CLARK-A1528-3628
Pinus monophylla
John C. Roos
1947-12-14
3764
Riverside
Lost Palms Canyon
Comment
UCR19208
Pinus monophylla
John C. Roos
1947-4-5
3435
Riverside
Santa Rosa Mtns., Pinyon Flats
1311
Comment
CLARK-A1528-3559
Pinus monophylla
John C. Roos
1947-7-14
2817
Inyo
Panamint Mountains
2468
Comment
UC1023436
Piptatherum micranthum
John and Lucille Roos
1952-7-28
5840
Inyo
Wyman Canyon White Mts., Wyman Canyon (steep rocky n wall)
Comment
UCR19347
Piptatherum miliaceum
John C. Roos
1959-6-27
s.n.
San Bernardino
San Bernardino Valley, Hwy. 99 - 395 [= I-10/395] interchange east of Colton
299
Comment
UCR23995
Piptatherum miliaceum
John C. Roos
1965-6-19
s.n.
Riverside
Peninsular Range; Santa Ana Mtns, Sky Line Drive, south of Corona
Comment
CAS-BOT-BC254443
Piptatherum miliaceum
John Roos; Lucille Roos
1953-11-29
6043
San Luis Obispo
Near chicken pens, California Polytechnic College campus, San Luis Obispo
91
Comment
CLARK-A1528-3591
Pityrogramma triangularis
John C. Roos
1936-11-21
Riverside
La Sierra
Comment
CLARK-A1528-3805
Pityrogramma triangularis
John C. Roos
1949-6-27
4521
San Bernardino
Kingston Range
1645
Comment
CLARK-A1528-5209
Pityrogramma triangularis
John C. Roos
1949-6-27
4521
San Bernardino
Kingston Range
1645
Comment
CLARK-A1528-3590
Pityrogramma triangularis var. viscosa
John C. Roos
1937-2-23
1316
Orange
Laguna Hills
Comment
CLARK-A1528-2257
Plagiobothrys arizonicus
John C. Roos
1937-3-25
1834
Kern
Comment
CLARK-A1528-2259
Plagiobothrys californicus
John C. Roos
1952-2-29
5368
Riverside
Reche Canyon
457
Comment
RSA85109
Plagiobothrys canescens
J. C. Roos
1952-4-30
5605
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
UCR25300
Plagiobothrys hispidulus
John C. Roos
1947-6-21
3706
San Bernardino
San Bernardino Mtns, Running Springs
1838
Comment
UCR30506
Plagiobothrys leptocladus
John C. Roos
1952-5-7
5623
Riverside
Flats at Edgemont
488
Comment
CLARK-A1528-3434
Plantago erecta
John C. Roos
1937-3-5
1300
Riverside
La Sierra
Comment
CLARK-A1528-3422
Plantago major
John C. Roos
1950-5-13
4806
San Bernardino
Rabbit Springs
883
Comment
CLARK-A1528-697
Plantago major
John C. Roos
1951-9-25
5274
Riverside
Riverside
259
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
POM301485
Plantago virginica
J. C. Roos
1937-6-13
1709
San Diego
San Isidro
Comment Read comments May 24 2009
UCR19154
Platanthera sparsiflora
John C. Roos
1949-7-4
4542
San Bernardino
San Bernardino Mtns., Vivian Creek
2165
Comment
CLARK-A1528-3415
Platystemon californicus
John C. Roos
1966-3-24
Riverside
Winchester
Comment
CAS-BOT-BC326676
Pleiacanthus spinosus
J. C. Roos; E. C. Jaeger
1955-7-23
6509
Inyo
Soldier Flat, east base Waucoba Mountains, Inyo Mountains
2194
Comment
RSA155665
Pleuraphis jamesii
J. C. Roos
1955-6-17
6404
Inyo
2 miles north of Willow Spring, Last Chance Mountains.
2011
Comment
RSA92061
Pleuraphis jamesii
J. C. Roos
1954-5-8
6095
Inyo
Grapevine Mountains above Leadfield
1584
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
CLARK-A1528-2059
Pluchea sericea
John C. Roos
1947-3-1
3301
Imperial
Fish Springs
Comment
CLARK-A1528-283
Pluchea sericea
John C. Roos, Lucille Roos
1951-10-24
5340
Riverside
Pedley
228
Comment
UCR23992
Pluchea sericea
John C. Roos
1965-7-11
s.n.
Inyo
Northern Mojave Desert, Furnace Creek, Death Valley
-61
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
UCSB45961
Poa bigelovii
Roos, John
1955-4-8
Inyo
Last Chance Mtns.; east of Eureka Valley sand dunes
1310
Comment
CLARK-A1528-4818
Poa bolanderi subsp. howellii
John C. Roos
1939-6-24
918
San Bernardino
Sawpit Canyon
1158
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
UCSB51280
Poa howellii
Roos, John; Roos, Lucille
1957-6-1
San Bernardino
Yucaipa Ridge, 0.5 miles S.W. of Mill Creek Public Camp, Mill Creek, San Bernardino Mtns.
Comment
UCR25361
Poa pratensis
John C. Roos
1952-5-7
5622
Riverside
Flats at Edgemont
488
Comment
CLARK-A1528-4838
Poa scabrella
John C. Roos
1942-5-1
1158
Riverside
Dry Morongo Canyon
609
Comment
RSA61543
Poa secunda
J. C. Roos
1950-6-3
4826
San Bernardino
Rabbit Springs. Mojave desert.
884
Comment
UCR20620
Poa secunda
John C. Roos, L. Roos
1950-6-3
4826
San Bernardino
Southern Mojave Desert, Rabbit Springs, Lucerne Valley
884
Comment
UCR20622
Poa secunda
John C. Roos, A. R. Roos
1953-8-13
6018
Inyo
Northern Mojave Desert, Crest of Inyo Mtns, 3 mi east of Badger Flat
3308
Comment
UCR24041
Poa secunda
John C. Roos
1942-7-1
1270
Mariposa
Sierra Nevada Mtns., Yosemite National Park, between Cloud's Rest and Half Dome
2287
Comment
HSC78743
Poa secunda subsp. secunda
J. C. Roos, L. Roos
1950-6-3
4826
San Bernardino
Rabbit Springs, Mojave Desert.
884
Comment
CLARK-A1528-3455
Polemonium chartaceum
John C. Roos
1960-7-4
Mono
White Mountains
Comment
UCR26200
Polemonium chartaceum
John C. Roos
1960-7-4
s.n.
Mono
White Mtns, 'Crooked Creek' [but probably actually from White Mtn. Peak, and now mapped along the trail below the peak]
4345
Comment Read comments Jul 24 2016
RSA0094953
Polemonium chartaceum
John C. Roos
1960-7-4
s.n.
Mono
Crooked Creek, White Mtns.
Comment
UCR23713
Polycarpon tetraphyllum
John C. Roos
1942-5-23
1061
Los Angeles
Monrovia, 300 block on E Lime St.
179
Comment
RSA47295
Polygala acanthoclada
J. C. Roos, Roos
1949-6-22
4453
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
UCR23448
Polygala acanthoclada
John C. Roos
1949-6-22
4453
San Bernardino
Eastern Mojave Desert, Keystone Canyon, New York Mtns.
1829
Comment
CLARK-A1528-3769
Polygonum amphibium var. emersum
John C. Roos, Lucille Roos
1954-10-9
6253
Ventura
Lake Sherwood
300
Comment
CLARK-A1528-5207
Polygonum convolvulus
John C. Roos
1959-7-30
Sonoma
Healdsburg Garden
Comment
CLARK-A1528-3785
Polygonum douglasii
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR24278
Polygonum douglasii
John C. Roos
1940-7-16
s.n.
San Bernardino
San Bernardino Mtns., Green Valley
Comment
RSA69863
Polygonum lapathifolium
J. C. Roos, Lucille Roos
1951-9-11
5200
San Bernardino
Loma Linda.
320
Comment
UCR25366
Polypodium californicum
John C. Roos
1952-4-16
5547
Riverside
Damp canyon off Reche Canyon.
518
Comment
UCR30580
Polypogon monspeliensis
John C. Roos, A. R. Roos
1950-8-7
s.n.
San Bernardino
Northeastern Mojave Desert, Beck Spring, Kingston Mountains
1372
Comment
CAS-BOT-BC237528
Polypogon viridis
J. C. Roos; A. C. Sanders
1965-6-12
s.n.
San Bernardino
Igo's near Mountain Home Village and Mill Creek, San Bernardino Mountains
Comment
RSA53583
Polypogon viridis
J. C. Roos
1949-11-16
4695
San Bernardino
Loma Linda.
329
Comment
UCR24383
Populus balsamifera subsp. trichocarpa
John C. Roos
1946-9-28
3095
San Bernardino
San Bernardino Mtns., Near Fish Creek
2241
Comment
CLARK-A1528-4066
Populus tremuloides
John C. Roos
1967-7-8
San Bernardino
San Bernardino Mountains
2133
Comment
CLARK-A1528-4070
Populus tremuloides
John C. Roos
1948-9-7
Mono
Sierra Nevada
Comment
POM266317
Porophyllum gracile
J. C. Roos
1937-5-10
2337
Orange
East of San Juan Capistrano.
Comment
CAS-BOT-BC233729
Portulaca halimoides
John Roos; Lucille Roos
1952-10-18
5900
Riverside
Hidden Valley Campground, Little San Bernardino Mts.
1219
Comment
UCR23514
Potentilla biennis
John C. Roos
1937-8-5
1025
Inyo
White Mtns., White Mtns.
Comment
CLARK-A1528-4016
Potentilla breweri
John C. Roos
1937-8-8
537
Inyo
Sierra Nevada
Comment
LA102307
Potentilla gracilis
J. C. Roos;
1937-7-26
338
San Bernardino
San Bernardino Mountains, Bear Valley, Pine Knot ( now city of Big Bear )
Comment
UCSB37792
Potentilla gracilis
Roos, John
1965-7-18
San Bernardino
Moonridge, Bear Valley, San Bernardino Mtns.
Comment
RSA450249
Potentilla gracilis var. elmeri
J. C. Roos
1965-7-18
s.n.
San Bernardino
Moonridge, Bear Valley, San Bernardino Mountains.
Comment
NY833090
Potentilla morefieldii
J. C. Roos
1951-8-10
5140
Mono
Saddle 1 mile southeast of White Mountain Peak, White Mountains
3962
Comment
UCR23547
Proboscidea althaeifolia
John C. Roos
1965-9-5
s.n.
Riverside
Sonoran (Colorado) Desert, 17 miles west of Blythe
122
Comment
RSA0013900
Proboscidea louisianica
J. C. Roos
1948-9-2
4024
Colusa
West of Williams.
Comment
CLARK-A1528-3400
Proboscidea parviflora
John C. Roos
1959-8-5
San Bernardino
Loma Linda
Comment
CLARK-A1528-2872
Prosopis pubescens
John C. Roos
1965-7-11
Inyo
Death Valley
Comment
CLARK-A1528-3155
Prunella vulgaris
John C. Roos
1965-7-31
San Bernardino
San Bernardino Mountains
Comment
GH346323
Prunus andersonii
J. C. Roos
1955-5-15
6370
Unknown
Willow Spring, Last Chance Mts.
1828
Comment
CLARK-A1528-4027
Prunus emarginata
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4028
Prunus emarginata
John C. Roos
1937-8-18
2410
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-4033
Prunus fremontii
John C. Roos
1937-4-18
San Diego
Jacumba
Comment
UCR26205
Prunus virginiana
John C. Roos
1947-5-31
3659
Los Angeles
San Gabriel Mountains, Big Pines
2134
Comment
CLARK-A1528-2067
Psathyrotes ramosissima
John C. Roos
1937-8-25
2023
San Bernardino
Comment
UCD135049
Pseudognaphalium biolettii
John Roos
1947-3-21
3372
Riverside
Plateau', Reche Canyon.
Comment
UCR26135
Pseudognaphalium biolettii
John C. Roos
1952-2-29
5374
Riverside
Reche Canyon
Comment
UCSB45955
Pseudognaphalium stramineum
Roos, John
1965-7-18
San Bernardino
Bear Valley, San Bernardino Mtns.
Comment
RSA592494
Pseudostellaria jamesiana
J. C. Roos
1965-7-18
s.n.
San Bernardino
Moonridge, Bear Valley, San Bernardino Mountains.
Comment
CLARK-A1528-2068
Psilocarphus brevissimus
John C. Roos
1937-5-10
2498
Riverside
Lake Elsinore
Comment
UCR18981
Psoralea physodes
John C. Roos
1960-5-30
s.n.
Riverside
Santa Ana Mtns., Ridge north of Bedford Peak.
1220
Comment
UCR18995
Psorothamnus arborescens var. arborescens
John C. Roos
1947-4-18
3444
San Bernardino
Central Mojave Desert, hills 3 mi. west of Barstow
Comment
UCR25855
Psorothamnus emoryi
John C. Roos, Lucille Roos
1949-4-6
4139
Riverside
Sonoran (Colorado) Desert, east of Mecca
Comment
UCR23857
Psorothamnus schottii
John C. Roos
1966-5-2
s.n.
Riverside
Western Colorado Desert, mouth of Pushawalla Canyon, Indio Mtns [Hills].
Comment
UCSB42194
Psorothamnus schottii
Roos, John
1966-5-2
Riverside
At the mouth of Pushawalla Canyon, Indio Mtns.
Comment
CLARK-A1528-1307
Pterospora andromedea
John C. Roos
1937-7-20
1993
San Bernardino
San Bernardino Mountains
Comment
UCR30818
Pterospora andromedea
Lucille Roos
1965-8-10
s.n.
Siskiyou
Klamath National Forest, Bear Lake, Marble Mountains
1473
Comment
UCR24288
Pterostegia drymarioides
John C. Roos
1942-5-23
1067
Los Angeles
Transverse Range; San Gabriel Mtns., Chantry Flats, Santa Anita Canyon
Comment
CLARK-A1528-5621
Pulicaria hispanica
John C. Roos
1962-10-19
Riverside
Whitewater
548
Comment
UC1234824
Purshia mexicana var. stansburyana
J. C. Roos
1955-7-21
6492
Inyo
1 mi s Willow Spring; Last Chance Mountains
2072
Comment
CAS-BOT-BC143780
Purshia stansburyana
John Roos; Lucille Roos
1947-7-14
2879
Inyo
Mahogany Flats, Panamint Mts.
2468
Comment
POM261395
Purshia stansburyana
J. C. Roos
1941-8-17
71
Inyo
Panamint Mountains; Wildrose Canyon at Kilns
Comment
UCR23467
Purshia stansburyana
John C. Roos, A. R. Roos
1954-6-14
s.n.
Inyo
Northern Mojave Desert, Panamint Mtns, head of Wildrose Canyon
2439
Comment
RSA72073
Purshia tridentata var. tridentata
J. C. Roos, Lucille Roos
1951-8-12
5187
Inyo
1 mile S of Reed Flat. White Mtns.
2957
Comment
RSA74606
Purshia tridentata var. tridentata
J. C. Roos, L. Roos
1951-8-12
5187
Inyo
1 mi. south of Reed Flat, White Mts.
2957
Comment
UC1494275
Pyrrocoma racemosa var. paniculata
J. C. Roos
1965-7-11
Inyo
Tecopa
Comment
POM274225
Pyrrocoma sessiliflora
J. C. Roos
1947-9-20
2815
Inyo
South end Owen Lake at Olancha
Comment
POM266367
Pyrrocoma uniflora var. gossypina
J. C. Roos
1937-7-26
2472
San Bernardino
Bear Valley, Pine Knot.
Comment
UCR34463
Pyrrocoma uniflora var. gossypina
John C. Roos
1949-7-23
4583
San Bernardino
San Bernardino Mtns., Holcomb Valley
Comment
CLARK-A1528-5679
Quercus X morehus
John C. Roos
1943-2-28
2591
San Bernardino
San Bernardino Mountains
2072
Comment
CLARK-A1528-2916
Quercus agrifolia
John C. Roos
1939-4-16
283
Napa
Angwin
Comment
SEINET13953046
Quercus agrifolia
J. C. Roos
1965-1
San Bernardino
Hills near summit of Pine to Palms Highway, San Jacinto and Santa Rosa Mountains
Comment
RSA450473
Quercus agrifolia var. oxyadenia
J. C. Roos
1965-9-26
s.n.
Riverside
San Janinto & Santa Rosa Mountains: hills near summit of Pines to Palms Highway.
Comment
UCR23913
Quercus chrysolepis
John C. Roos
1949-6-22
4455
San Bernardino
Eastern Mojave Desert, New York Mtns, canyon bottoms and up to the summit of Keystone Canyon.
2256
Comment
UCSB46878
Quercus chrysolepis
Roos, John
1965-6-6
San Bernardino
Mill Creek, near Fallsvale, San Bernardino Mtns.
Comment
CAS-BOT-BC94212
Quercus engelmannii
J. C. Roos
1965-10-10
s.n.
San Diego
5 mi NE of Fallbrook
Comment
RSA450123
Quercus engelmannii
J. C. Roos
1965-10-10
s.n.
San Diego
5 mi NE of Fallbrook.
Comment
CLARK-A1528-2927
Quercus kelloggii
John C. Roos
1946-9-4
2944
San Bernardino
San Bernardino Mountains
Comment
POM262791
Quercus lobata
J. C. Roos
1939-3-27
282
Napa
Angwin, Howell Mountains.
Comment
CLARK-A1528-5678
Quercus palmeri
John C. Roos
1967-5-20
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2913
Quercus wislizeni
John C. Roos
1939-4-16
284
Napa
Angwin
Comment
UCR18990
Quercus wislizeni
John C. Roos
1965-9-26
s.n.
Riverside
Santa Rosa Mtns, Near summit of Palms to Pines Hwy
1524
Comment
CLARK-A1528-1174
Quercus wislizeni var. frutescens
John C. Roos
1946-9-15
3011
San Bernardino
San Bernardino Mountains
2224
Comment
CLARK-A1528-1175
Quercus wislizeni var. frutescens
John C. Roos
1946-9-1
2979
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2908
Quercus wislizeni var. frutescens
John C. Roos
1947-1-4
3196
Riverside
Box Springs Mountains
487
Comment
CLARK-A1528-2909
Quercus wislizeni var. frutescens
John C. Roos
1940-5-11
850
San Bernardino
San Bernardino Mountains
1219
Comment
CLARK-A1528-2075
Rafinesquia neomexicana
John C. Roos
1947-3-1
3304
Riverside
Garnet
Comment
CLARK-A1528-2074
Raillardella argentea
John C. Roos
1946-9-4
2951
San Bernardino
San Bernardino Mountains
3413
Comment
CLARK-A1528-3873
Ranunculus cymbalaria
John C. Roos
1960-7-4
Mono
White Mountains
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
UCR25385
Ranunculus eschscholtzii
John C. Roos
1937-8-8
980
Inyo
Sierra Nevada Mtns., Lone Pine Canyon below Mt. Whitney
3506
Comment
POM265651
Reseda odorata
J. C. Roos
1937-8-31
2563
San Diego
Oceanside
Comment
CLARK-A1528-3904
Rhamnus californica
John C. Roos
1937-6-8
San Diego
Warner Springs
Comment
CLARK-A1528-3905
Rhamnus californica
John C. Roos
1968-9-21
San Bernardino
San Bernardino Mountains
1219
Comment
RSA450094
Rhamnus californica
J. C. Roos
1965-6-6
s.n.
San Bernardino
San Bernardino Mtns, Mill Creek near Fallsvale.
Comment
UCR18918
Rhamnus pilosa
John C. Roos
1937-6-14
531
San Diego
Peninsular Range, Alpine
Comment
UCR23636
Rhododendron occidentale
John C. Roos
1957-7-2
6645
Sonoma
Miller Ridge
Comment
CLARK-A1528-5597
Rhus integrifolia
John C. Roos
1950-2-25
4709
San Bernardino
Santa Ana River
396
Comment
CLARK-A1528-5598
Rhus integrifolia
John C. Roos
1950-2-25
4709
San Bernardino
Santa Ana River
396
Comment
CAS-BOT-BC167969
Rhus ovata
John C. Roos
1950-10-15
5007
Riverside
Dry Morongo Canyon about 1 mile S. of Riverside-San Bernardino County line
609
Comment
CLARK-A1528-2406
Rhus trilobata
John C. Roos
1948-5-15
3831
Riverside
Eagle Mountains
Comment
CLARK-A1528-4116
Ribes amarum
John C. Roos
1942-3-21
1092
Los Angeles
San Gabriel Mountains
Comment
CAS-BOT-BC93343
Ribes cereum
J. C. Roos; A. R. Roos
1953-8-9
5970
Inyo
Southeast of Tamarck Canyon, Inyo Mountains.
3230
Comment
CAS-BOT-BC93344
Ribes cereum
John Roos; Lucille Roos
1954-6-29
6190
Inyo
The Narrows, Marble Canyon, Inyo Mountains.
2209
Comment
CLARK-A1528-4127
Ribes cereum
John C. Roos
1946-8-27
2782
Riverside
Santa Rosa Mountains
Comment
RSA155732
Ribes cereum
J. C. Roos
1955-6-19
6450
Inyo
Last Chance Mountains: Whitetop Peak, 2 miles west of Last Chance Spring.
2576
Comment
RSA47302
Ribes cereum
J. C. Roos, L. Roos
1949-6-24
4484
San Bernardino
North slope of Clark Mountain.
2256
Comment
RSA0025035
Ribes divaricatum var. pubiflorum
J. C. Roos
1939-4-1
312
Sonoma
Hood Peak Range west of Calistoga.
Comment
CLARK-A1528-4129
Ribes indecorum
John C. Roos
1947-3-15
3341
Riverside
San Jacinto Mountains
Comment
RSA0021116
Ribes lasianthum
J. C. Roos
1937-5-31
10
Los Angeles
Big Pines.
Comment
CLARK-A1528-4133
Ribes malvaceum var. viridifolium
John C. Roos
1966-2-11
Los Angeles
Claremont
304
Comment
RSA450229
Ribes malvaceum var. viridifolium
J. C. Roos
1966-2-11
s.n.
Los Angeles
Claremont.
Comment
CLARK-A1528-4136
Ribes montigenum
John C. Roos
1946-9-4
2949
San Bernardino
San Gorgonio Peak
3413
Comment
CLARK-A1528-5730
Ribes quercetorum
John C. Roos
1952-2-18
5354
Riverside
Reche Canyon
761
Comment
CLARK-A1528-4143
Ribes roezlii
John C. Roos
1940-5-11
844
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4146
Ribes roezlii
John C. Roos
1965-6-6
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
RSA47304
Ribes velutinum
J. C. Roos
1949-6-27
4503
San Bernardino
Kingston Mts
1982
Comment
UCR19140
Ribes velutinum
John C. Roos, L. Roos
1954-6-26
6164
Inyo
Northern Mojave Desert, Inyo Mtns, Mazourka Canyon
2439
Comment
CLARK-A1528-443
Ricinus communis
John C. Roos
1951-10-4
5317
San Bernardino
San Bernardino
320
Comment
LA102248
Romneya coulteri
John C. Roos;
1952-6-8
sn
San Bernardino
San Timoteo Canyon, S. of Redlands
457
Comment
CLARK-A1528-2336
Rorippa nasturtium-aquaticum
John C. Roos
1948-4-24
3795
Riverside
Whitewater
Comment
UCR23436
Rorippa sphaerocarpa
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Bear Valley
Comment
CLARK-A1528-824
Rosa californica
John C. Roos
1951-9-25
5261
Riverside
Riverside
Comment
RSA659659
Rosa woodsii
J. C. Roos
1948-7-4
s.n.
Inyo
Thorndykes Spring, Panamint Mtns.
Comment
UCR23512
Rosa woodsii var. glabrata
John C. Roos
1946-9-21
3047
San Bernardino
San Bernardino Mtns., Cushenbury Spring
1280
Comment
UCSB37356
Rubus leucodermis
Roos, John
1965-7-17
San Bernardino
Barton Flats, San Bernardino Mtns
Comment
UCR25376
Rubus pensilvanicus
John C. Roos
1949-4-2
4137
San Bernardino
San Bernardino Valley, NE corner of Waterman Ave. and Mill St., San Bernardino
309
Comment
POM265701
Rumex crispus
J. C. Roos
1942-10-19
2570
Los Angeles
On vacant lot, West Los Angeles.
Comment
CLARK-A1528-1001B
Rumex triangulivalvis
John C. Roos
1937-7-29
1982
San Bernardino
Bluff Lake
2316
Comment
RSA443540
Rupertia rigida
J. C. Roos
1965-7-31
s.n.
San Bernardino
Barton Flats, Camp Oceola
Comment
UCSB42110
Ruta graveolens
Roos, John
1950-4-22
Riverside
Pass between Reche Canyon and Pigeon Pass Road
457
Comment
POM264308
Sagina saginoides
J. C. Roos
1937-6-22
641
San Bernardino
Near South Fork of Santa Ana River.
Comment Read comments Oct 26 2013
POM301710
Sagittaria latifolia
J. C. Roos
1937-8-4
1952
Inyo
Owens River, near Lone Pine.
Comment
CLARK-A1528-4053
Salix exigua
John C. Roos
1937-4-26
618
San Bernardino
Providence Mountains
Comment
CLARK-A1528-4056
Salix laevigata
John C. Roos
1947-11-1
3758
Riverside
Eagle Mountains
Comment
RSA659608
Salix laevigata
J. C. Roos
1952-2-18
5351
Riverside
At west end of Fairmount Park, Riverside.
259
Comment
UCR23243
Salix lasiolepis
John C. Roos
1949-8-14
4617
San Bernardino
Eastern Mojave Desert, Keystone Canyon, New York Mtns.
1707
Comment
UCR26204
Salix lasiolepis
John C. Roos, L. Roos
1952-3-1
5383
Riverside
2.5 miles north of Moreno by a seep below reservoir
610
Comment
POM262963
Salix scouleriana
J. C. Roos
1937-7-16
620
Los Angeles
Near Mt. San Antonio, San Gabriel Mountains.
2287
Comment
CLARK-A1528-4367
Salpichroa origanifolia
John C. Roos
1949-10-12
4690
San Bernardino
Loma Linda
335
Comment
RSA79486
Salsola tragus
J. C. Roos, A. Roos
1953-8-13
6008
Inyo
Tamarack Canyon.
2744
Comment
CLARK-A1528-5348
Salvia X bernardina
John C. Roos, Lucille Roos
1951-10-3
5314
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-590
Salvia X bernardina
John C. Roos, Lucille Roos
1951-10-3
5314
San Bernardino
Loma Linda
320
Comment
UCR18811
Salvia X bernardina
John C. Roos, L. Roos
1951-10-3
5314
San Bernardino
San Bernardino Valley, Loma Linda.
320
Comment
UCR18808
Salvia apiana
John C. Roos
1965-6-13
s.n.
Riverside
Santa Rosa Mtns., Dos Palmas Spring
Comment
CAS-BOT-BC220749
Salvia clevelandii
John Roos; Lucille Roos
1950-8-19
4943
San Diego
Torrey Pines Park
60
Comment
RSA47460
Salvia dorrii var. pilosa
J. C. Roos
1949-5-28
4334
San Bernardino
North slope of washes, Clark Mtn, near Green's Mine
1616
Comment
CLARK-A1528-3114
Salvia funerea
John C. Roos, Lucille Roos
1954-3-27
6051
Inyo
Death Valley National Park
853
Comment
UC1010280
Salvia funerea
John and Lucille Roos
1954-3-27
6057
Inyo
below Klare Spring (Titus Canyon); Death Valley, Grapevine Mts.
914
Comment
CLARK-A1528-3115
Salvia funerea
John C. Roos
1938-4-17
1621
Inyo
Death Valley Park Nursery
Comment
CLARK-A1528-1327
Salvia greatae
John C. Roos
1949-4-6
Imperial
Chocolate Mountains
91
Comment
CLARK-A1528-3120
Salvia mohavensis
John C. Roos
1942-5-1
1113
San Bernardino
Little San Bernardino Mountains
Comment
CLARK-A1528-3121
Salvia mohavensis
John C. Roos
1943-5-23
2684
San Bernardino
Little San Bernardino Mountains
Comment
CLARK-A1528-3122
Salvia mohavensis
John C. Roos
1965-6-23
Riverside
Lost Palms Canyon
Comment
SEINET12325161
Sambucus caerulea
J. C. Roos
1965-1
s.n.
Inyo
Upper Wildrose Canyon, Panamint Mountains
Comment
RSA591730
Sambucus mexicana
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
305
Comment
CLARK-A1528-4858
Sanicula bipinnatifida
John C. Roos
1937-4-17
1380
San Bernardino
Redlands
Comment
CLARK-A1528-4938
Sanicula bipinnatifida
John C. Roos
1937-6-15
1675
San Diego
Cuyamaca Lake
Comment
CLARK-A1528-2192
Sanvitalia abertii
John C. Roos
1950-9-1
4954
San Bernardino
Clark Mountain
1645
Comment
CLARK-A1528-1468
Sarcostemma cynanchoides
John C. Roos
1940-8-20
906
Riverside
Reche Canyon
Comment
SEINET13947746
Satureja douglasii
J. C. Roos
1948-1
3963
Monterey
3400 ft elev
1036
Comment
UCR19303
Schismus barbatus
John C. Roos
1952-3-19
5400
Riverside
Peninsular Range, Box Springs Mountains [east edge of Riverside]
457
Comment
CLARK-A1528-2458
Scopulophila rixfordii
John C. Roos, Lucille Roos
1954-5-8
6097
Inyo
Grapevine Mountains
1371
Comment
RSA40585
Scrophularia californica var. desertorum
J. C. Roos
1947-7-13
2892
Inyo
East slope Baldy Peak, Panamint Mts.
Comment
UCR23623
Scutellaria siphocampyloides
John C. Roos
1940-8-17
1598
San Bernardino
San Bernardino Mountains, Barton Flats
1994
Comment
RSA0076362
Sedum lanceolatum
J. C. Roos
1937-8-8
342
Inyo
Lone Pine Canyon.
2744
Comment
CLARK-A1528-2625
Sedum rosea subsp. integrifolium
John C. Roos
1937-8-8
1614
Inyo
Lone Pine Canyon
Comment
RSA0078613
Sedum spathulifolium
J. C. Roos
1965-6-28
s.n.
San Bernardino
Mill Creek canyon, San Bernardino Mtns. At Igo's.
Comment
UCR30829
Sedum stenopetalum
John C. Roos
1937-8-8
342
Inyo
Sierra Nevada Mtns., Lone Pine Canyon below Mt. Whitney
3506
Comment Read comments Dec 21 2020
CLARK-A1528-4080
Selaginella watsonii
John C. Roos, Lucille Roos
1951-8-10
5147
Mono
White Mountain
4297
Comment
RSA0010744
Senecio astephanus
J. C. Roos, Lucille Roos
1952-6-14
5771
San Bernardino
Mill Creek S of Mill Creek Public Camp
1159
Comment
UCR19257
Senecio flaccidus var. monoensis
John C. Roos
1947-11-1
3757
Riverside
Sonoran (Colorado) Desert, Eagle Mtns, Lost Palms Canyon
976
Comment
RSA0125063
Senecio integerrimus var. exaltatus
John C. Roos, Lucille Roos
1952-7-30
5870
Mono
Crooked Creek, White Mts.
3049
Comment
CLARK-A1528-2084
Senecio ionophyllus
John C. Roos
1964-6-26
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2085
Senecio jacobaea
John C. Roos
1957-7-1
6625
Mendocino
Fort Bragg
Comment
CAS-BOT-BC332948
Senecio spartioides
John Roos; Lucille Roos
1951-8-8
5102
Mono
Big Prospector Meadow at head of Crooked Creek, Whtie Mountains
3169
Comment
CAS-BOT-BC332974
Senecio spartioides
J. C. Roos; R. Roos
1966-9-13
s.n.
San Bernardino
On a ridge between the headwaters of Fish Creek and North Fork meadows, San Bernardino Mountains.
Comment
CLARK-A1528-2090
Senecio spartioides
John C. Roos
1966-9-13
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2091
Senecio spartioides
John C. Roos
1946-9-15
3038
San Bernardino
San Bernardino Mountains
3169
Comment
UCR30518
Senecio spartioides
John C. Roos
1937-7-28
2430
San Bernardino
San Bernardino Mtns, Van Deusen Canyon [Caribou Creek], near Bear Valley
2195
Comment
UCR18868
Senecio triangularis
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
POM265689
Senna covesii
J. C. Roos
1937-4-28
787
San Bernardino
Turtle Mountains.
Comment
CLARK-A1528-5028
Setaria geniculata
John C. Roos
1946-8-26
2931
San Bernardino
Loma Linda
Comment
POM301694
Setaria parviflora
J. C. Roos
1937-8-27
738
San Bernardino
San Bernardino.
Comment
UCR31319
Setaria parviflora
John C. Roos
1951-9-23
5240
San Bernardino
San Bernardino Valley, 2 miles west of Loma Linda
305
Comment
CLARK-A1528-1257
Setaria viridis
John C. Roos
1937-7-12
1504
San Bernardino
Loma Linda
365
Comment
UCR18960
Silene andersonii
John C. Roos
1941-8-17
59
Inyo
Northern Mojave Desert, Panamint Mountains
3319
Comment
CLARK-A1528-2467
Silene lemmonii
John C. Roos
1937-6-17
2385
San Diego
Palomar Mountain
Comment
CLARK-A1528-2468
Silene lemmonii
John C. Roos
1941-6-1
93
San Bernardino
San Bernardino Mountains
Comment Read comments Feb 20 2015
UCR23677
Silene lemmonii
John C. Roos
1965-6-12
s.n.
San Bernardino
San Bernardino Mtns., Mill Creek, Igo's [Store] near Mountain Home Village
1220
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
CLARK-A1528-2469
Silene parishii
John C. Roos
1966-8-6
San Bernardino
San Bernardino Mountains
Comment
POM262923
Simmondsia chinensis
J. C. Roos
1941-4-5
184
San Bernardino
Coyote Well.
Comment
CLARK-A1528-5036
Sitanion hansenii
John C. Roos, Lucille Roos
1951-8-8
5094
Inyo
White Mountains
3169
Comment
CLARK-A1528-5043
Sitanion hansenii
John C. Roos
1952-6-13
5765
Riverside
Reche Canyon
457
Comment
CLARK-A1528-4369
Solanum douglasii
John C. Roos
1965-8-23
San Bernardino
Loma Linda
Elevation 1000+ ft
Comment
CLARK-A1528-892
Solanum douglasii
John C. Roos
1951-9-25
5296
Riverside
Riverside
259
Comment
RSA47200
Solanum triflorum
J. C. Roos, L. Roos
1949-6-25
4489
San Bernardino
Colisseum Mine, north side of Clark Mts.
1616
Comment
RSA48873
Solidago confinis
J. C. Roos
1949-9-3
4653
Inyo
Tecopa
427
Comment
UCR25295
Solidago confinis
John C. Roos
1946-9-21
3043
San Bernardino
N slope San Bernardino Mtns/S Mojave Desert, Box 'S' Springs
1082
Comment
CLARK-A1528-295
Solidago occidentalis
John C. Roos
1951-9-25
5282
Riverside
Riverside
259
Comment
UCR24169
Solidago occidentalis
John C. Roos
1946-10-2
s.n.
San Bernardino
San Bernardino Valley, south of San Bernardino
305
Comment
CAS-BOT-BC365819
Soliva sessilis
John Roos; Lucille Roos
1953-5-9
5916
Riverside
Fairmount Park, Riverside
259
Comment
UC1023427
Soliva sessilis
John and Lucille Roos
1953-5-9
5916
Riverside
Fairmount Park
259
Comment
CLARK-A1528-5540
Sorghum bicolor
Alfred R. Roos
1936-11-11
Riverside
Riverside
243
Comment
CLARK-A1528-2475
Spergularia bocconi
John C. Roos
1966-3-13
Riverside
Winchester
Comment
UCSB42171
Spergularia bocconi
Roos, John
1966-3-13
Riverside
On roadside, Winchester
Comment
UCR23704
Spergularia macrotheca
John C. Roos
1956-5-27
6583
San Bernardino
San Bernardino Valley, north side of Hwy 99, 0.2 mi west of Waterman Ave
305
Comment
CLARK-A1528-5318
Spergularia marina
John C. Roos
1947-5-10
3623
San Bernardino
Loma Linda
Comment
UCR23705
Spergularia marina
John C. Roos
1952-4-14
5538
San Bernardino
San Bernardino Valley, Loma Linda.
305
Comment
UCR25931
Spergularia marina
John C. Roos
1947-3-15
3349
Riverside
Santa Rosa Mountains/Colorado Desert, Deep Canyon
366
Comment
UCR25932
Spergularia marina
John C. Roos, L. Roos
1951-10-24
5337
Riverside
Santa Ana River, at Pedley
229
Comment
CLARK-A1528-7748
Sphaeralcea ambigua
John C. Roos
1965-6-16
San Bernardino
Adelanto
Comment
UCR23557
Sphaeralcea ambigua
John C. Roos
1965-6-16
s.n.
San Bernardino
Western Mojave Desert, four miles north of Adelanto
854
Comment
RSA105030
Sphaeralcea ambigua subsp. monticola
J. C. Roos
1955-5-15
6379
Inyo
Willow Creek, Last Chance Mts.
1524
Comment
UC1010263
Sphaeralcea ambigua var. ambigua
John C. Roos
1952-4-16
5542
Riverside
Box Springs
487
Comment
GH420971
Sphaeralcea ambigua var. pulchella
J. C. Roos
1955-5-15
6379
Unknown
Willow Creek, Last Chance Mts.
1524
Comment
RSA45522
Sphaeralcea emoryi
J. C. Roos, L. Roos
1949-4-7
4174
Imperial
near Winterhaven
Comment
RSA40576
Sphaeromeria cana
J. C. Roos
1947-7-13
2877
Inyo
Summit of Telescope Peak
3363
Comment
CLARK-A1528-1459
Sphenosciadium capitellatum
John C. Roos
1937-7-22
1680
San Bernardino
San Bernardino Mountains
Comment
UCR24189
Spiranthes romanzoffiana
John C. Roos
1937-8-18
1221
Riverside
San Jacinto Mountains, Taquitz Valley
2500
Comment
UCR30609
Sporobolus airoides
John C. Roos, A. R. Roos
1950-8-7
4924
Inyo
Northern Mojave Desert, Tecopa in Amargosa River Valley
427
Comment
CLARK-A1528-5033
Sporobolus contractus
John C. Roos
1950-9-3
4982
San Bernardino
Clark Mountains
1523
Comment
RSA52774
Sporobolus contractus
J. C. Roos
1950-9-1
4948
San Bernardino
Valley Wells, eastern Mojave Desert.
1128
Comment
CAS-BOT-BC235438
Sporobolus cryptandrus
J. C. Roos; A. R. Roos
1955-8-26
6560
Inyo
Soldier Flat, east base Waucoba Mt., Inyo Mts.
2164
Comment
CAS-BOT-BC235448
Sporobolus cryptandrus
J. C. Roos
1965-6-7
s.n.
San Bernardino
Victorville
Comment
UCSB45563
Sporobolus cryptandrus
Roos, John
1965-6-7
San Bernardino
Victorville
Comment
CLARK-A1528-5542
Sporobolus flexuosus
John C. Roos
1946-9-14
3021
Riverside
Asbestos Mountain
1066
Comment
RSA89869
Sporobolus flexuosus
J. C. Roos
1950-10-21
5016
San Bernardino
N base of Little San bernardino Mtns.
915
Comment
UC1023422
Sporobolus flexuosus
John C. Roos
1950-9-1
4949
San Bernardino
Valley Wells Station Mojave Desert, Valley Wells Station
1127
Comment
UCR23277
Sporobolus flexuosus
John C. Roos, L. Roos
1950-10-21
5016
San Bernardino
Mojave Desert, Joshua Tree [city], N base of Little San Bernardino Mtns.
915
Comment
UCSB51360
Sporobolus indicus
J. C. Roos
1965-11-4
Riverside
collected on a lawn at the Fairmont Park, in Riverside Fairmont Park
Comment
CLARK-A1528-5046
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
CLARK-A1528-4918
Stanleya elata
John C. Roos
1947-7-15
2822
Inyo
Argus Mountains
Comment
UC1236240
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
UC1236260
Stanleya pinnata
John C. Roos
1955-5-13
6353
Inyo
se end Eureka Valley; se end Eureka Valley
914
Comment
UCR23434
Stanleya pinnata
John C. Roos
1955-5-16
6391
Inyo
Northern Mojave Desert, west side Inyo Mtns., Waucoba Road 6 mi east of Big Pine
1494
Comment
NY185734
Stanleya pinnata subsp. inyoensis
J. C. Roos
1954-6-28
6177
Inyo
Southeast end of Eureka Valley
3000
Comment
CLARK-A1528-370
Stanleya pinnata subsp. pinnata
John C. Roos
1971-4-26
San Bernardino
Joshua Tree National Park
609
Comment
UCR23435
Stanleya pinnata var. inyoensis
John C. Roos
1955-5-13
6353
Inyo
Northern Mojave Desert, SE end of Eureka Valley
945
Comment
CAS-BOT-BC60964
Stanleya pinnata var. pinnata
John C. Roos
1955-5-13
6353
Inyo
Southeast end Eureka Valley.
914
Comment
CAS-BOT-BC60965
Stanleya pinnata var. pinnata
John C. Roos
1955-5-13
6353
Inyo
Southeast end Eureka Valley.
914
Comment
CLARK-A1528-2106
Stephanomeria cichoriacea
John C. Roos
1965-10-2
San Bernardino
San Bernardino Mountains
Comment
POM263096
Stephanomeria cichoriacea
J. C. Roos
1937-7-16
392
San Bernardino
Above Stockton Flats. San Gabriel Mountains.
Comment
UCSB49868
Stephanomeria cichoriacea
Roos, John
1965-10-2
San Bernardino
East Fork Mtn. Home Canyon, San Bernardino Mtns.
Comment
UCR24208
Stephanomeria parryi
John C. Roos
1937-5-30
2496
San Bernardino
Mojave Desert, Hesperia
Comment
CLARK-A1528-4969
Stephanomeria pauciflora
John C. Roos
1947-7-15
2828
Inyo
Panamint Mountains
914
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
CLARK-A1528-2714
Stillingia paucidentata
John C. Roos
1969-5-10
Kern
Red Rock Canyon
Comment
CLARK-A1528-5271
Stipa californica
John C. Roos, Lucille Roos
1951-8-8
5107
Inyo
White Mountains
3169
Comment
UCR24293
Stipa cernua
John C. Roos
1945-3-14
s.n.
Los Angeles
Los Angeles, Olympic Blvd., west of Fox Studios
Comment
CLARK-A1528-5266
Stipa comata
John C. Roos, Alfred R. Roos
1953-8-8
5942
Inyo
Inyo Mountains
2651
Comment
UCR19288
Stipa coronata
John C. Roos
1950-5-27
4817
Riverside
Peninsular Range, Hills NE of summit of Reche Canyon
762
Comment
UCR25382
Stipa coronata
John C. Roos
1947-5-10
3613
Riverside
Peninsular Range, Console Springs, north of Sunnymead
671
Comment
UCR19293
Stipa elmeri
John C. Roos
1946-9-4
2960
San Bernardino
San Bernardino Mtns., San Gorgonio Ridge
3445
Comment
LA102165
Stipa hymenoides
John C. Roos;
1965-6-7
sn
San Bernardino
Victorville
Comment
CLARK-A1528-5586
Stipa lepida
John C. Roos
1952-5-19
5691
Riverside
Moreno
Comment
CLARK-A1528-5253
Stipa lettermanii
John C. Roos
1946-8-25
2929
San Bernardino
San Bernardino Mountains
2377
Comment
UCR20452
Stipa lettermanii
John C. Roos, L. Roos
1950-6-24
4842
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
CLARK-A1528-5270
Stipa speciosa
John C. Roos
1952-4-9
5495
Riverside
Mount Rubidoux
365
Comment
CLARK-A1528-5295
Stipa speciosa
John C. Roos
1938-4-18
8722
Inyo
Death Valley National Park
Comment
CLARK-A1528-5552
Stipa speciosa
John C. Roos
1937-7-14
Riverside
Reche Canyon
Comment
UCR24303
Stipa speciosa
John C. Roos
1942-3-7
1003
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR25606
Stipa thurberiana
John C. Roos
1951-8-8
5087
Inyo
White Mtns, 3 mi NW of Cedar Flat
2591
Comment
UCR23432
Streptanthus cordatus
John C. Roos
1955-6-17
6399
Inyo
Northern Mojave Desert, 2 mi. NE of Willow Spring, Last Chance Mtns.
1835
Comment
CLARK-A1528-2346
Streptanthus cordatus
John C. Roos
1947-7-11
2841
Inyo
Panamint Mountains
2499
Comment
GH422039
Streptanthus cordatus
J. C. Roos & L. Roos
1952-7-27
5835
Unknown
S.E. rim Reed Flat, Whtie Mts.
3139
Comment
UCR19210
Stylomecon heterophylla
John C. Roos
1973-4-14
s.n.
San Bernardino
San Bernardino Valley, Loma Linda Hills
Comment
POM301519
Styrax redivivus
J. C. Roos
1937-5-10
2326
Orange
East of San Juan Capistrano.
Comment
UC1234808
Suaeda calceoliformis
J. C. and A. R. Roos
1955-8-28
6565
Inyo
3 mi n Olancha (w side of Owens Lake); Owens Lake
1082
Comment
UCR24327
Suaeda moquinii
John C. Roos
1937-7-4
1770
Santa Barbara
Upper Cuyama Valley
Comment
CAS-BOT-BC221899
Swallenia alexandrae
John C. Roos
1955-5-13
6365
Inyo
West side Eureka Valley at mouth of Marble Canyon
1036
Comment
GH341023
Swallenia alexandrae
J. C. Roos
1955-5-13
6352
Unknown
southeast end Eureka Valley.
944
Comment
UCSB40904
Swallenia alexandrae
John C. Roos and Lucille Roos
1954-6-28
6175
Inyo
collected in the N-slope of sand dune at SE-end of the Eureka Valley Eureka Valley
929
Comment
UCSB49608
Swallenia alexandrae
John C. Roos and Lucille Roos
1954-6-28
6175
Inyo
collected in the N-slope of sand dune at SE-end of the Eureka Valley Eureka Valley
929
Comment
POM263484
Swertia perennis
J. C. Roos
1937-8-8
527
Inyo
Lone Pine Canyon.
2744
Comment
UCD136700
Symphyotrichum subulatum var. parviflorum
J. C. Roos
1949-10-1
4680
Orange
Doheney Beach.
3
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-A1528-1457
Tauschia parishii
John C. Roos
1937-5-28
San Bernardino
San Bernardino 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
RSA48172
Tetradymia argyraea
J. C. Roos, Weatherby
1949-9-2
3572
San Bernardino
Summit of Kingston Peak
2232
Comment
RSA48174
Tetradymia argyraea
J. C. Roos
1949-6-25
3560
San Bernardino
Clark Mountains: Coliseum Mine
1616
Comment
RSA48175
Tetradymia argyraea
J. C. Roos
1949-5-29
4376
San Bernardino
Clark Mountains: Coliseum Mine
Comment
UC1010295
Tetradymia argyraea
J. C. Roos
1950-9-2
4965
San Bernardino
1 mi se Coliseum Mine; Mojave Desert, Clark Mts.
1615
Comment
UC809590
Tetradymia argyraea
J. C. Roos and R. Weatherby
1949-9-2
3573
San Bernardino
ne of Kingston Pk.; Kingston Mts.
2133
Comment
CLARK-A1528-2118
Tetradymia canescens
John C. Roos
1937-7-15
385
San Bernardino
San Gabriel Mountains
1737
Comment
POM261189
Tetradymia canescens
J. C. Roos
1941-8-17
56
Inyo
Panamint Mountains:
3048
Comment
UCR19189
Tetradymia canescens
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mountains, Independence Creek [near Onion Valley]
2683
Comment
CLARK-A1528-2123
Tetradymia comosa
John C. Roos
1965-6-27
San Bernardino
Loma Linda Hills
304
Comment
POM266373
Tetradymia comosa
J. C. Roos
1940-6-24
1587
San Bernardino
South of Loma Linda.
Comment
RSA659719
Tetradymia comosa
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
305
Comment
RSA155693
Tetradymia glabrata
J. C. Roos
1955-6-21
6469
Inyo
Inyo Mountains. Narrow canyon along Loretto Rd. 1.5 mi SW of Loretto Mine, E slope of mtns
1677
Comment
RSA662546
Tetradymia glabrata
J. C. Roos
1969-5-10
s.n.
Kern
Red Rock Canyon
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
UCR18588
Tetradymia spinosa var. longispina
John C. Roos
1965-5-20
s.n.
San Bernardino
Mojave Desert, Hesperia
Comment
CLARK-A1528-1381
Tetragonia tetragonioides
John C. Roos
1951-9-25
5288
Riverside
Riverside
259
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
UCR25787
Thysanocarpus curvipes
John C. Roos
1952-4-16
5544
Riverside
Reche Canyon.
457
Comment
UCR18803
Thysanocarpus laciniatus
John C. Roos
1948-5-8
3818
Riverside
San Bernardino Mtns, Whitewater
579
Comment
RSA0103518
Tiquilia canescens var. canescens
J. C. Roos
1949-5-29
3534
San Bernardino
North foot of Clark Mts., eastern Mojave Desert.
1220
Comment
UCR18796
Tiquilia nuttallii
John C. Roos
1937-8-6
1961
Inyo
Sierra Nevada Mtns, Big Pine
Comment
RSA92336
Tiquilia plicata
J. C. Roos
1954-6-28
6181
Inyo
North base of sand dunes at SE end of Eureka Valley
915
Comment
CAS-BOT-BC377027
Townsendia scapigera
John Roos; Lucille Roos
1951-8-9
5120
Inyo
Reed Flat and 1 mile south of Reed Flat, White Mts.
3048
Comment
RSA79484
Townsendia scapigera
J. C. Roos, A. R. Roos
1953-8-13
6010
Inyo
Head of Tamarack Canyon, Inyo Mountains.
3140
Comment
UC1023402
Townsendia scapigera
J. C. and A. R. Roos
1953-8-13
6010
Inyo
Head of Tamarack Canyon Inyo Mts.
3139
Comment
CAS-BOT-BC377029
Townsendia scapigera
J. C. Roos
1955-6-19
6436
Inyo
East ridge one mile south of Willow Spring, Last Chance Mountains
2286
Comment
CLARK-A1528-1417
Toxicodendron diversilobum
John C. Roos
1952-4-28
5589
Riverside
Riverside
Comment
CAS-BOT-BC438298
Trianthema portulacastrum
J. C. Roos
1965-9-5
s.n.
Riverside
18 miles W. of Blythe.
Comment
UCR19709
Trianthema portulacastrum
John C. Roos
1954-11-21
6256
San Bernardino
San Bernardino Valley, Loma Linda
336
Comment
UCR24156
Trichocoronis wrightii
John C. Roos
1937-6-7
2505
Riverside
San Jacinto River Valley, S base of Jackrabbit Trail, San Jacinto Valley
Comment
UCR18810
Trichoptilium incisum
John C. Roos
1966-3-20
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mtns, rocky canyon 2.5 miles SE of Desert Center
610
Comment
CLARK-A1528-3134
Trichostema parishii
John C. Roos
1937-5-31
752
San Bernardino
Cajon Canyon
Comment
CLARK-A1528-5280
Tridens muticus
John C. Roos
1949-5-29
3536
San Bernardino
Clark Mountain
1737
Comment
CLARK-A1528-5281
Tridens muticus
John C. Roos
1949-5-29
3535
San Bernardino
Clark Mountain
1402
Comment
UCR24378
Tridens muticus
John C. Roos
1966-11-12
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mtns, Spring Tank
457
Comment
RSA662538
Trifolium amplectens
J. C. Roos
1966-3-24
s.n.
Riverside
Flats west of Hemet.
Comment
UCSB45553
Trifolium depauperatum var. amplectens
Roos, John
1966-3-24
Riverside
Flats west of Hemet
Comment
UCR23847
Trifolium dubium
Alfred R. Roos
1954-5-29
s.n.
Los Angeles
Hollywood
Comment
CLARK-A1528-2880
Trifolium gracilentum
John C. Roos
1950-4-1
4720
Los Angeles
Comment
POM263331
Trifolium repens
J. C. Roos
1937-7-18
402
Los Angeles
Near Currys Camp Baldy, San Antonio Canyon. Between Los Angeles and San Bernardino County.
Comment
UCR18630
Trifolium truncatum
John C. Roos
1952-4-2
5458
Riverside
Edgemont
488
Comment
CLARK-A1528-2882
Trifolium wormskioldii
John C. Roos
1950-8-12
4933
San Bernardino
San Bernardino Mountains
2194
Comment
UCSB42197
Trifolium wormskioldii
Roos, John
1965-6-26
San Bernardino
Santa Ana River Canyon, Heart Bar area, San Bernardino Mtns.
Comment
CLARK-A1528-2881
Trifolium wormskioldii
John C. Roos
1952-5-20
5699
San Bernardino
San Bernardino
304
Comment
POM301610
Triodanis biflora
J. C. Roos
1937-6-8
1498
San Diego
Warner Hot Springs.
Comment
CLARK-A1528-5306
Trisetum canescens
John C. Roos
1940-8-17
1593
San Bernardino
San Bernardino Mountains
2011
Comment
CLARK-A1528-5576
Trisetum canescens
John C. Roos
1941-8-2
86
Riverside
San Jacinto Mountains
2133
Comment
POM261188
Trisetum canescens
J. C. Roos
1941-8-2
86
Riverside
Dark Canyon.
2134
Comment
CLARK-A1528-5294
Trisetum spicatum
John C. Roos
1937-8-8
423
Inyo
Lone Pine Canyon
Comment
UCR26329
Trisetum spicatum
John C. Roos
1967-10-7
s.n.
Inyo
Big Pine Creek below Palisade Glacier
2896
Comment
RSA78389
Triteleia ixioides subsp. scabra
J. C. Roos
1951-5-27
5049
Mariposa
8 miles E of Mariposa.
1006
Comment
UCR18634
Triteleia laxa
John C. Roos
1950-7-22
4866
Sonoma
Jenner
30
Comment
UCSB45530
Triteleia laxa
Roos, John; Roos, Lucille
1952-4-13
San Bernardino
Hills south of Loma Linda, San Bernardino Valley
381
Comment
CLARK-A1528-1069
Trixis californica
John C. Roos
1937-6-10
1510
Imperial
Mountain Springs
670
Comment
CLARK-A1528-2356
Tropidocarpum gracile
John C. Roos
1937-3-25
1335
Los Angeles
Comment
CLARK-A1528-3021
Turricula parryi
John C. Roos
1946-8-27
2942
Riverside
Santa Rosa Mountains
2194
Comment
UCR23387
Vancouveria planipetala
John C. Roos
1957-7-2
6647
Sonoma
Miller Ridge
Comment
CLARK-A1528-2268
Vancouveria planipetala
John C. Roos
1958-6-20
Mariposa
Yosemite National Park
Comment
CLARK-A1528-4323
Verbascum thapsus
John C. Roos
1937-7-25
2359
San Bernardino
San Bernardino Mountains
Comment
POM301528
Verbascum thapsus
J. C. Roos
1937-7-25
2359
San Bernardino
Seven Oaks, San Bernardino Mountains.
Comment
UCR19141
Verbena scabra
John C. Roos
1951-9-29
5307
San Bernardino
San Bernardino Valley, Warm Creek near east San Bernardino
305
Comment
UCR25396
Verbena scabra
John C. Roos
1937-7-31
964
San Bernardino
San Bernardino Valley, San Bernardino
305
Comment
CLARK-A1528-1038
Veronica americana
John C. Roos
1937-7-21
San Bernardino
San Bernardino Mountains
1920
Comment
RSA47429
Veronica americana
J. C. Roos, L. Roos
1949-6-28
4525
San Bernardino
Beck's Spring, Kingston Mts.
Comment
CLARK-A1528-4338
Veronica persica
John C. Roos
1947-2-8
3231
San Bernardino
San Bernardino County Hospital
Comment
CLARK-A1528-5153
Veronica persica
John C. Roos
1947-3-21
3376
San Bernardino
Loma Linda
Comment
UCR19523
Veronica persica
John C. Roos
1950-6-3
4821
San Bernardino
San Bernardino Valley, Loma Linda University campus, Loma Linda
323
Comment
CLARK-A1528-1223
Veronica serpyllifolia
John C. Roos
1943-7-4
San Bernardino
San Bernardino Mountains
2438
Comment
CLARK-A1528-2138
Viguiera deltoidea var. parishii
John C. Roos
1946-11-30
3167
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-2139
Viguiera deltoidea var. parishii
John C. Roos
1946-9-14
3022
Riverside
San Jacinto Mountains
1097
Comment
UCR27517
Viola adunca
John C. Roos
1937-6-5
931
San Bernardino
San Bernardino Mtns., Crestline
Comment
CLARK-A1528-1316
Viola douglasii
John C. Roos
1937-6-5
1475
San Bernardino
San Bernardino Mountains
1523
Comment
RSA444669
Viola purpurea subsp. purpurea
J. C. Roos
1966-5-7
s.n.
San Bernardino
Barton Flats, San Bernardino Mts.
Comment
POM263284
Vulpia microstachys var. pauciflora
J. C. Roos
1937-3-26
443
Kern
Plains east of Maricopa.
Comment
RSA648673
Vulpia microstachys var. pauciflora
J. C. Roos
1952-3-2
5464
Riverside
Box Springs grade east of Riverside.
426
Comment
CLARK-A1528-1501
Washingtonia filifera
John C. Roos
1943-12-19
2762
Riverside
Pushawalla Canyon
Comment
POM262895
Wislizenia refracta subsp. refracta
J. C. Roos
1936-4-22
606
Riverside
10 miles E of Indio
Comment
UCR25097
Wyethia mollis
John C. Roos
1948-9-7
4007
Tuolumne
Sierra Nevada Mtns, Yosemite National Park, NE of Tuolumne Meadows
2744
Comment
CLARK-A1528-5620
Wyethia ovata
John C. Roos
1937-6-8
1488
San Diego
Warner Springs
Comment
RSA79480
X Stiporyzopsis bloomeri
J. C. Roos, L. Roos
1953-8-13
6014
Inyo
Along crest of Inyo Mts. 3 miles east of Badger flat.
3171
Comment
CLARK-A1528-5392
Xanthium strumarium var. canadense
John C. Roos
1951-9-25
5279
Riverside
Riverside
259
Comment
UCR30575
Yucca baccata
John C. Roos
1949-5-28
4329
San Bernardino
Eastern Mojave Desert, wash near Green's Mine, north side Clark Mountain
1646
Comment
UCR30451
Yucca brevifolia
John C. Roos
1966-4-3
s.n.
San Bernardino
Mojave Desert, 6 mi south of Victorville
Comment
CLARK-A1528-1500
Yucca schidigera
John C. Roos, Lucille Roos
1952-5-19
5686
Riverside
San Timoteo Canyon
487
Comment
CLARK-A1528-3310
Zauschneria cana
John C. Roos
1936-10-13
1536
Los Angeles
Arroyo Seco
Comment
CLARK-A1528-3311
Zauschneria cana
John C. Roos
1946-11-23
3159
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-3202
Zigadenus brevibracteatus
John C. Roos
1969-5-10
Kern
Red Rock Canyon
Comment
UCR24151
Zigadenus brevibracteatus
John C. Roos
1949-4-30
4276
San Bernardino
Mojave Desert, 3 mi north of Hesperia
Comment