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