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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
UCR25761
Abronia villosa
John C. Roos
1937-4-25
770
San Bernardino
Southeastern Mojave Desert, Chambless, near [east of] Amboy [on old Route 66]
Comment
RSA0023454
Acacia farnesiana subsp. minuta
J. C. Roos
1937-8-30
2560
San Diego
South of Otay.
Comment
CLARK-A1528-2720
Acacia greggii
John C. Roos
1950-8-4
San Bernardino
Clark Mountain Range
Comment
CLARK-A1528-2686
Acalypha californica
John C. Roos
1937-8-30
2565
San Diego
Jamul
Comment
RSA44244
Acamptopappus shockleyi
J. C. Roos
1949-5-29
3533
San Bernardino
N base of Clark Mtns.
1341
Comment
UC1080601
Acamptopappus shockleyi
John C. Roos
1955-5-13
6345
Inyo
e, in sand dunes, at w base of Last Chance Mts Eureka Valley; Last Chance Mts.
1280
Comment
RSA92296
Acamptopappus shockleyi
J. C. Roos, L. Roos
1954-5-8
6098
Inyo
Grapevine Mountains above Leadfield
1584
Comment
CLARK-A1528-4977
Acer glabrum
John C. Roos
1947-7-14
2849
Inyo
Panamint Mountains
Comment
RSA85653
Acer glabrum subsp. diffusum
J. C. Roos, A. R. Roos
1950-8-6
4915
San Bernardino
Kingston Peak, Kingston Mountains., Eastern Mojave Desert.
2165
Comment
UCSB45949
Achillea millefolium
Roos, John
1965-6-12
San Bernardino
Igos, near Mountain Home Village in Mills Canyon, San Bernardino Mtns.
Comment
CAS-BOT-BC216439
Achnatherum aridum
J. C. Roos; A. R. Roos
1950-8-5
4894
San Bernardino
1.5 miles SW of Coliseum Mine, Clark Mountains, Mojave Desert
1737
Comment
GH361382
Achnatherum aridum
J. C. Roos
1955-5-13
6346
Unknown
west base Last Chance Mts., east of the Eureka Valley sand dunes.
1280
Comment
CAS-BOT-BC210581
Achnatherum coronatum
J. C. Roos
1965-6-6
s.n.
San Bernardino
Mill Creek near Fallsvale, San Bernardino
Comment
CAS-BOT-BC260479
Achnatherum hymenoides
J. C. Roos
1965-6-7
s.n.
San Bernardino
Victorville
Comment
CAS-BOT-BC260414
Achnatherum hymenoides
J. C. Roos; A. R. Roos
1953-8-13
6013
Mono
Crest of Inyo Mountains, 3 miles E of Badger Flat
3169
Comment
SEINET13387085
Achnatherum hymenoides
J. C. Roos
1965-1
San Bernardino
Victorville, Mohave Desert
Comment
UCSB37778
Achnatherum lemmonii
Roos, John
1965-7-17
San Bernardino
Stetson Creek, Barton Flats, San Bernardino Mtns.
Comment
UCSB37783
Achnatherum occidentale subsp. californicum
Roos, John
1981-09
San Bernardino
Barton Flats, San Bernardino Mtns.
Comment
RSA155762
Achnatherum occidentale subsp. occidentale
J. C. Roos, A. R. Roos
1955-8-26
6556
Inyo
N shoulder Waucoba Mts, Inyo Mts
3354
Comment
RSA40606
Achnatherum occidentale subsp. occidentale
J. C. Roos
1946-9-4
2960
San Bernardino
In gravel among rocks, San Gorgonio Ridge, San Bernardino Mts
3415
Comment
RSA40612
Achnatherum occidentale subsp. occidentale
J. C. Roos
1946-9-15
3032
San Bernardino
Rocky moraine above Dry Lake, San Bernardino Mts.
2957
Comment
RSA648083
Achnatherum occidentale subsp. occidentale
J. C. Roos
1937-7-18
398
Los Angeles
Mt. Wilson Observatory.
Comment
UCSB37784
Achnatherum occidentale subsp. occidentale
Roos, John
1965-7-18
San Bernardino
Bear Valley, San Bernardino Mtns.
Comment
CAS-BOT-BC218077
Achnatherum pinetorum
J. C. Roos; A. R. Roos
1954-6-12
6132
Inyo
Ridge between Wild Rose and Trail Canyons, 1 mile ESE of Wild Rose Peak, Panamint Mountains
2499
Comment
CAS-BOT-BC218080
Achnatherum pinetorum
J. C. Roos
1955-7-21
6480
Inyo
Summit, Whitetop Peak, Last Chance Mountains
2499
Comment
CAS-BOT-BC218000
Achnatherum webberi
John Roos; Lucille Roos
1952-7-25
5819
Inyo
Between Westgard Pass and Reed Flat, White Mountains
2438
Comment
UCSB42196
Acmispon nevadensis var. davidsonii
Roos, John
1965-6-26
San Bernardino
Upper Santa Ana River, San Bernardino Mtns.
Comment
POM302518
Acourtia microcephala
J. C. Roos
1943-7-15
2734
San Bernardino
San Timoteo Canyon, south of Redlands
Comment
UCR30527
Adenostoma fasciculatum
John C. Roos
1952-5-26
5722
Riverside
Haas' Ranch, Reche Canyon
457
Comment
CLARK-A1528-3972
Adenostoma sparsifolium
John C. Roos
1965-8-18
Riverside
San Jacinto Mountains
Comment
UCR18788
Adiantum aleuticum
John C. Roos
1949-7-2
4529
San Bernardino
San Bernardino Mountains, Snow Canyon [Rattlesnake Creek], Mill Creek
2104
Comment
CAS-BOT-BC69629
Adiantum capillus-veneris
J. C. Roos
1955-7-23
6512
Inyo
Mouth of Beveridge Canyon, e. base Inyo Mts., Saline Valley.
609
Comment
UCR18785
Adiantum capillus-veneris
John C. Roos
1948-5-15
3850
Riverside
Sonoran (Colorado) Desert, Eagle Mountains, upper Lost Palms Canyon
1037
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
CLARK-A1528-3539
Adiantum jordanii
John C. Roos
1952-2-29
5363
Riverside
Reche Canyon
457
Comment
CLARK-A1528-3578
Adiantum pedatum
John C. Roos
1948-5-29
3871
Riverside
Whitewater Canyon
Comment
CLARK-A1528-3579
Adiantum pedatum subsp. aleuticum
John C. Roos
1937-3-27
1330
Santa Barbara
Solvang
Comment
UCR19131
Agastache urticifolia
John C. Roos
1946-8-31
2990
San Bernardino
San Bernardino Mtns., Oak Glen, irrigation ditch behind Oak Glen School
1433
Comment
CAS-BOT-BC35126
Ageratina herbacea
John C. Roos
1950-9-2
4969
San Bernardino
Clark Mountains, 1.5 miles south of Colisum Mine, eastern Mohave Desert
1706
Comment
CLARK-A1528-1618
Ageratina herbacea
John C. Roos
1950-9-2
4969
San Bernardino
Clark Mountain
1706
Comment
RSA662530
Ageratina occidentalis
J. C. Roos
1948-9-7
3999
Tuolumne
Tioga Pass, Sierra Nevada Mtns.
2744
Comment
UCR30495
Agoseris glauca
John C. Roos, A. R. Roos
1953-8-11
6003
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
POM266382
Agoseris heterophylla var. heterophylla
J. C. Roos
1937-3-17
2458
Los Angeles
San Fernando Valley.
Comment
POM263462
Agrostis idahoensis
J. C. Roos
1937-8-8
424
Inyo
Lone Pine Canyon.
2744
Comment
RSA263175
Agrostis idahoensis
J. C. Roos
1937-8-18
465
Riverside
Round Valley, San Jacinto Mountains.
Comment
UCSB40901
Agrostis pallens
Roos, John
1939-6-8
Los Angeles
Canyon in hills N of Burbank
Comment
UCR23918
Agrostis scabra
John C. Roos
1940-8-3
1555
San Bernardino
San Bernardino Mtns., Bluff Lake
2317
Comment
OBI40201
Agrostis stolonifera
John C. Roos
1950-9-16
4988
Los Angeles
Santa Monica Blvd & Midvale Ave, Los Angeles
61
Comment
UCR25414
Agrostis stolonifera
John C. Roos
1949-11-16
4695
San Bernardino
San Bernardino Valley, Loma Linda, N Anderson Street
323
Comment
UCR24051
Agrostis viridis
John C. Roos
1950-7-5
4849
San Bernardino
San Bernardino Valley, Loma Linda, residence at 414 Steward Street
335
Comment
UCR30616
Agrostis viridis
John C. Roos, A. R. Roos
1950-8-7
s.n.
San Bernardino
Northeastern Mojave Desert, Beck Spring, Kingston Mountains
1372
Comment
CLARK-A1528-4082
Ailanthus altissima
Alfred R. Roos
1949-7-21
Los Angeles
Los Angeles
Comment
UCR26197
Ailanthus altissima
John C. Roos
1937-6-8
937
San Diego
Peninsular Range, Warner Hot Springs
Comment
RSA44250
Aliciella triodon
J. C. Roos
1949-5-28
3541
San Bernardino
North slope of Clark Mt.
1585
Comment
UCR25789
Allenrolfea occidentalis
John C. Roos
1937-8-6
972
Inyo
Sierra Nevada Mtns, Bishop
1250
Comment
CLARK-A1528-3262
Allionia incarnata
John C. Roos
1937-4-25
2103
San Bernardino
Essex
Comment
UC1010302
Allionia incarnata
John C. Roos
1950-9-1
4952
San Bernardino
eastern Mohave Desert, Valley Wells Valley Wells; eastern Mohave Desert, Valley Wells
1127
Comment
CLARK-A1528-1506
Allium fimbriatum
John C. Roos
1950-6-24
4840
San Bernardino
Bear Valley
2224
Comment
POM263555
Allium fimbriatum var. fimbriatum
J. C. Roos
1941-5-10
129
Riverside
Pinyon Flats Camp, Santa Rosa Mountains.
1220
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
UCR18571
Allium nevadense var. cristatum
John C. Roos
1949-5-29
4369
San Bernardino
Eastern Mojave Desert, Coloseum Mine, Clark Mountain
1707
Comment
UCR26247A
Allium nevadense var. cristatum
John C. Roos
1949-6-27
4511
San Bernardino
Eastern Mojave Desert, steep north side of the Kingston Mtns.
2104
Comment
RSA648735
Allium peninsulare
J. C. Roos
1948-5-22
3865
San Bernardino
In a canyon S.E. of the summit of Reche Canyon.
Comment
UCR18569
Allium praecox
John C. Roos
1950-3-27
4718
San Bernardino
San Bernardino Valley, steep north slope of Slover Mtn.
351
Comment
UCR24324
Allophyllum divaricatum
John C. Roos
1965-1-12
s.n.
San Bernardino
San Bernardino Mtns., Mill Creek
Comment
UCR30820
Allophyllum glutinosum
John C. Roos
1949-7-30
4597
San Diego
Peninsular Range, hills north of Pala
122
Comment
CLARK-A1528-2276
Alnus rhombifolia
John C. Roos
1965-9-11
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-5243
Alnus rhombifolia var. bernardina
John C. Roos
1936-8-15
570
San Bernardino
San Bernardino Mountains
1981
Comment
UCR25146
Amaranthus albus
John C. Roos
1965-7-4
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
306
Comment
CLARK-A1528-1393
Amaranthus californicus
John C. Roos
1937-8-19
2020
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-1394
Amaranthus deflexus
John C. Roos
1954-10-19
6255
San Diego
Escondido
198
Comment
CLARK-A1528-1402
Amaranthus hybridus
John C. Roos
1954-11-21
6257
San Bernardino
Loma Linda
335
Comment
CLARK-A1528-2402
Amaranthus hybridus
John C. Roos
1951-9-19
5222
San Bernardino
Loma Linda
335
Comment
CLARK-A1528-5149
Amaranthus hybridus
John C. Roos
1954-11-21
6257
San Bernardino
Loma Linda
335
Comment
RSA662075
Amaranthus hybridus
A. R. Roos
1937-12-2
s.n.
San Diego
De Luz Canyon: Along De Luz-Murrieta Road and De Luz Creek.
150
Comment
UCR23418
Amaranthus hybridus
John C. Roos
1938-8-19
2753
San Bernardino
San Bernardino Valley, Loma Linda
305
Comment
UCR23421
Amaranthus hybridus
John C. Roos
1965-10-13
s.n.
Riverside
Corona
Comment
RSA0036246
Amaranthus hybridus
A. R. Roos
1937-12-2
s.n.
Orange
Santa Ana.
Comment
CLARK-A1528-1406
Amaranthus retroflexus
Alfred R. Roos
1937-11-24
San Bernardino
Bryn Mawr
Comment
UCD97777
Amaranthus retroflexus
A. R. Roos
1937-11-24
s.n.
San Bernardino
Bryn Mawr.
Comment
UCSB41538
Amaranthus retroflexus
Roos, Alfred
1937-11-24
San Bernardino
Bryn Mawr
Comment
CLARK-A1528-1533
Ambrosia acanthicarpa
John C. Roos
1965-9-26
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-1534
Ambrosia chenopodiifolia
John C. Roos
1937-6-13
1441
San Diego
San Ysidro
Comment
POM266301
Ambrosia chenopodiifolia
J. C. Roos
1937-6-13
1441
San Diego
hillside near San Ysidro
Comment
CLARK-A1528-1103
Ambrosia confertiflora
John C. Roos
1943-4-10
2613
San Bernardino
Loma Linda
365
Comment
UCR24359
Ambrosia psilostachya
John C. Roos
1938-8-19
2750
San Bernardino
San Bernardino Valley, Loma Linda
305
Comment
UCR27935
Amelanchier covillei
John C. Roos
1948-7-4
3914
Inyo
Panamint Mtns., Thorndike's Spring
2165
Comment
CLARK-A1528-3212
Ammannia coccinea
John C. Roos
1952-5-16
5672
Riverside
San Jacinto River
426
Comment
POM265818
Ammannia coccinea
J. C. Roos
1937-6-14
926
San Diego
La Mesa
Comment
UCR23953
Amorpha californica
John C. Roos
1952-6-13
5767
Riverside
Pass between Reche Canyon and the north base of Pigeon Pass.
488
Comment
RSA450474
Amorpha fruticosa
J. C. Roos
1965-9-28
s.n
Riverside
San Jacinto Valley, near Gilman Hot Springs in dry canyon bottom.
Comment
RSA92575
Amsinckia tessellata
J. C. Roos, L. Roos
1952-5-10
5627
San Bernardino
Kremer Hills {Kramer Hills}
854
Comment
RSA92576
Amsinckia tessellata
J. C. Roos, L. Roos
1952-5-10
5646
San Bernardino
Adelanto
915
Comment
CLARK-A1528-1482
Amsonia brevifolia
John C. Roos
1937-4-25
2120
San Bernardino
Providence Mountains
Comment
UCR23415
Amsonia tomentosa
John C. Roos, P. A. Munz
1955-4-8
6311
Inyo
Northern Mojave Desert, Last Chance Mtns, east of Eureka Valley sand dunes
1220
Comment
UC1026576
Ancistrocarphus filagineus
John and Lucille Roos
1954-5-11
6118
Riverside
Reche Canyon
609
Comment
CLARK-A1528-4455
Andropogon glomeratus
John C. Roos
1938-11-5
San Bernardino
San Bernardino Mountains
Comment
UCR23841
Andropogon glomeratus
John C. Roos
1965-7-11
s.n.
Inyo
Northern Mojave Desert, Furnace Creek, Death Valley
-61
Comment
UCR23921
Andropogon glomeratus
John C. Roos
1938-12-29
322
Riverside
San Jacinto Mtns/Colorado Desert, Palm Canyon
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-A1528-4073
Anemopsis californica
John C. Roos
1947-4-20
3506
Inyo
Furnace Creek
76
Comment
CLARK-A1528-1548
Antennaria marginata
John C. Roos
1947-6-27
3718
San Bernardino
San Bernardino Mountains
2346
Comment
CLARK-A1528-1549
Antennaria media
John C. Roos
1941-8-27
37
San Bernardino
San Bernardino Mountains
3352
Comment
CLARK-A1528-1553
Antennaria rosea
John C. Roos
1937-7-20
2375
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1554
Anthemis cotula
John C. Roos
1965-6-29
San Bernardino
Bryn Mawr
304
Comment
RSA659725
Anthemis cotula
J. C. Roos
1965-6-29
s.n.
San Bernardino
Bryn Mawr,
366
Comment
CLARK-A1528-4161
Antirrhinum coulterianum subsp. orcuttianum
John C. Roos
1937-5-10
2082
Orange
San Juan Capistrano
Comment
RSA450070
Antirrhinum kelloggii
J. C. Roos, A. C. Sanders
1956-4-8
6574
Ventura
North slope of ''Bony Mountain'' [Boney Mountain]. Potrero Valley
Comment
CLARK-A1528-4167
Antirrhinum nuttallianum
John C. Roos
1965-10-19
Riverside
Reche Canyon
Comment
RSA85443
Antirrhinum nuttallianum subsp. nuttallianum
J. C. Roos
1952-4-13
5517
Riverside
Box Springs Mts., above Canyon Crest Heights.
457
Comment
UCR30489
Antirrhinum nuttallianum subsp. nuttallianum
John C. Roos
1949-7-30
4599
San Diego
Peninsular Range, hills north of Pala
122
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
SEINET13948784
Aphyllon fasciculatum
John C. Roos
1965-1
Inyo
Arcane meadows, Near Telescope Peak, Panamint Mountains
Comment
UCR23397
Apiastrum angustifolium
John C. Roos
1943-4-28
2629
Riverside
hills SE of Riverside
Comment
CLARK-A1528-1426
Apium leptophyllum
John C. Roos
1937-4-21
Los Angeles
Claremont
Comment
CLARK-A1528-1474
Apocynum androsaemifolium
John C. Roos
1937-7-27
2355
San Bernardino
San Bernardino Mountains
Comment
RSA450127
Apocynum androsaemifolium subsp. pumilum
J. C. Roos
1965-7-17
s.n.
San Bernardino
Stetson Creek, Barton Flats, San Bernardino Mountains.
Comment
CLARK-A1528-1478
Apocynum pumilum
John C. Roos
1946-9-21
3053
San Bernardino
San Bernardino Mountains
2042
Comment
CLARK-A1528-1479
Apocynum pumilum
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
Comment
UCR26203
Aquilegia formosa
John C. Roos
1948-7-4
3911
Inyo
Panamint Mtns., Thorndike's Spring
2165
Comment
CLARK-A1528-3847
Aquilegia shockleyi
John C. Roos
1948-7-4
Inyo
Panamint Mountains
2163
Comment
RSA40588
Aquilegia shockleyi
J. C. Roos
1947-7-12
2899
Inyo
Thorndykes, Wildrose Canyon, Panamint Mounains.
2165
Comment
CLARK-A1528-2283
Arabis glaucovalvula
John C. Roos
1947-4-20
3515
Inyo
Panamint Range
1554
Comment
RSA0126443
Arabis hirsuta var. glabrata
J. C. Roos
1947-6-27
3719
San Bernardino
South Fork of Santa Ana River. San Bernardino Mts.
2409
Comment
CLARK-A1528-2284
Arabis inyoensis
John C. Roos
1937-8-8
2191
Inyo
Lone Pine Canyon
2743
Comment
UCR25409
Arabis pulchra
John C. Roos
1949-4-30
4260
San Bernardino
Mojave Desert, 6 mi. SW of Hesperia
1067
Comment
RSA47340
Arabis repanda
J. C. Roos
1949-7-16
4556
San Bernardino
Moonridge, Bear Valley, San Bernardino Mts.
2256
Comment
CLARK-A1528-1320
Arceuthobium divaricatum
John C. Roos
1965-7-10
Inyo
Mahogany Flats
Comment
UCR20380
Arceuthobium divaricatum
John C. Roos
1949-9-2
4635
San Bernardino
Eastern Mojave Desert, north slope of the Kingston Mountains
1982
Comment
CAS-BOT-BC76268
Arctomecon merriamii
John Roos; Lucille Roos
1954-5-8
6099
Inyo
Grapevine Mountains above Leadfield.
1584
Comment
RSA92295
Arctomecon merriamii
J. C. Roos, Lucille Roos
1954-5-8
6099
Inyo
Grapevine Mountains above Leadfield
1585
Comment
UCR23643
Arctostaphylos andersonii
John C. Roos
1940-6-13
1546
Monterey
3 or 4 mi east of Castroville.
Comment
POM302569
Arctostaphylos pungens
J. C. Roos
1943-5-23
2652
San Bernardino
Little San Bernardino Mountains.
1524
Comment
CLARK-A1528-2438
Arenaria aculeata
John C. Roos
1937-8-5
642
Inyo
White Mountains
2743
Comment Read comments Jun 4 2015
CLARK-A1528-2439
Arenaria aculeata
John C. Roos, Lucille Roos
1951-8-8
5118
Inyo
White Mountains
2956
Comment
CLARK-A1528-2443
Arenaria kingii subsp. compacta
John C. Roos
1949-6-21
3557
San Bernardino
New York Mountains
2224
Comment
CLARK-A1528-2444
Arenaria kingii subsp. compacta
John C. Roos
1951-8-11
5179
Mono
White Mountains
3474
Comment
GH376602
Arenaria kingii subsp. compacta
J. C. Roos & L. Roos
1951-8-10
5161
Unknown
1 mile north of Sheep Mtn., White Mts.
3596
Comment
UCR18876
Arenaria kingii var. glabrescens
John C. Roos, A. R. Roos
1953-8-11
5997
Inyo
Northern Mojave Desert, Inyo Mtns: 2.5 mi east of Blue Bell Mine
2988
Comment
CLARK-A1528-5148
Arenaria kingii var. glabrescens
John C. Roos, Alfred R. Roos
1953-8-7
5930
Inyo
Inyo Mountains
2743
Comment
UCR23710
Arenaria macradenia
John C. Roos
1943-5-23
2673
Riverside
S Mojave Desert, Little San Bernardino Mtns
1524
Comment
RSA47343
Argyrochosma jonesii
J. C. Roos, L. Roos
1949-6-24
4475
San Bernardino
north side of Clark Mtn. E. San Bernardino Co.
1676
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
UCR24407
Arida carnosa
John C. Roos
1946-9-21
3064
San Bernardino
Mojave Desert, Rabbit Springs, Lucerne Valley
887
Comment
RSA648674
Aristida adscensionis
J. C. Roos
1946-10-26
3143
Riverside
in the Chuckwalla Mtns., Colorado Desert.
Comment
UCR20454
Aristida adscensionis
John C. Roos
1952-4-9
5508
Riverside
Riverside, east face of Mt. Rubidoux
366
Comment
UCR26316
Aristida adscensionis
John C. Roos
1949-4-7
4176
Imperial
Sonoran (Colorado) Desert, Lower Colorado River Valley, near Winterhaven
40
Comment
CLARK-A1528-4465
Aristida californica
John C. Roos
1937-8-22
1209
Riverside
Mojave Desert
Comment
CLARK-A1528-4475
Aristida parishii
John C. Roos
1940-2-17
891
Riverside
Reche Canyon
457
Comment
CLARK-A1528-4487
Aristida purpurea
John C. Roos
1942-5-1
1153
Riverside
Joshua Tree National Monument
Comment
RSA659617
Aristida purpurea
J. C. Roos
1965-9-26
s.n.
Riverside
Palm Springs.
122
Comment
SEINET14214762
Aristida purpurea
J. C. Roos
1965-8-15
Riverside
Gilman Hot Springs, San Jacinto Valley
Comment
UCSB37780
Aristida purpurea
Roos, John
1965-8-15
Riverside
Gilman Hot Springs, San Jacinto Valley
Comment
UCSB37795
Aristida purpurea
Roos, John
1965-9-26
Riverside
Palm Springs
121
Comment
UCSB51394
Aristida purpurea
Roos, John
1965-6-23
Riverside
Lost Palms Canyon, Eagle Mtns
Comment
SEINET14198857
Aristida purpurea
J. C. Roos
1966-4-22
Riverside
Rocky hills between March AFB and Lakeview
Comment
CAS-BOT-BC137535
Aristida purpurea var. nealleyi
John C. Roos
1955-5-13
6338
Inyo
West base Last Chance Mountains, east of Eureka Valley sand dunes.
1219
Comment
CLARK-A1528-7798
Aristida purpurea var. nealleyi
John C. Roos
1949-4-11
4242
Riverside
Hayfield
Comment
CLARK-A1528-7867
Aristida purpurea var. nealleyi
John C. Roos, Lucille Roos
1950-10-21
5012
San Bernardino
Little San Bernardino Mountains
1219
Comment
POM264354
Aristida purpurea var. nealleyi
J. C. Roos
1938-8-7
582
Riverside
East of Hemet, in mountains along San Jacinto River.
Comment Read comments Apr 3 2011
UC1043026
Aristida purpurea var. nealleyi
John and Lucille Roos
1952-5-11
5655
San Bernardino
2 1/2 mi se Loma Linda; Scott's Canyon
426
Comment
UCR23877
Aristida purpurea var. nealleyi
John C. Roos
1955-5-13
6338
Inyo
Northern Mojave Desert, west base of Last Chance Mtns, east of Eureka Valley sand dunes
1223
Comment
POM266629
Aristida purpurea var. parishii
J. C. Roos
1940-2-17
891
San Bernardino
Reche Canyon, off San Bernardino Valley.
Comment
RSA444684
Aristida purpurea var. parishii
J. C. Roos
1965-6-13
s.n.
Riverside
Near Highway 74: W base of San Jacinto Mountains near San Jacinto River.
Comment
RSA457403
Aristida purpurea var. purpurea
J. C. Roos
1950-8-4
s.n.
San Bernardino
N side of Clark Mountain, east Mojave Desert.
Comment
RSA457405
Aristida purpurea var. purpurea
J. C. Roos
1965-9-26
s.n.
Riverside
Palm Springs.
122
Comment
RSA648675
Aristida purpurea var. purpurea
J. C. Roos
1954-5-8
6106
Inyo
Titus Canyon below Klare Spring, Grapevine Mountains
915
Comment
POM263172
Aristida ternipes var. hamulosa
J. C. Roos
1937-7-20
366
San Bernardino
Mentone.
Comment
CLARK-A1528-1563
Artemisia douglasiana
Alfred R. Roos
1937-11-15
San Bernardino
Loma Linda
Comment
CLARK-A1528-1569
Artemisia douglasiana
John C. Roos
1937-8-8
1022
Inyo
Sierra Nevada Mountains
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
CLARK-A1528-1573
Artemisia dracunculus
John C. Roos
1968-9-21
San Bernardino
San Bernardino Mountains
2438
Comment
CLARK-A1528-1574
Artemisia dracunculus
John C. Roos
1948-10-16
Riverside
Beaumont
Comment
UCR31736
Artemisia ludoviciana subsp. incompta
John C. Roos, L. Roos
1948-9-7
4000
Mono
Sierra Nevada Mtns, Tioga Pass
2683
Comment
SD52927
Artemisia norvegica subsp. saxatilis
J. C. Roos, A. R. Roos
1955-8-26
6555
Inyo
Summit Waucoba Mountain.
3350
Comment
CLARK-A1528-5119
Artemisia nova
John C. Roos
1951-8-8
5089
Inyo
White Mountains
2590
Comment
CLARK-A1528-1586
Artemisia nova
John C. Roos
1947-9-20
2805
Inyo
Panamint Mountains
2590
Comment
RSA92753
Artemisia nova
J. C. Roos, A. R. Roos
1954-8-14
6210
Inyo
1 1/2 miles east of Andrews Mountain, Inyo Mountains
2561
Comment
UCR19496
Artemisia tridentata
Alfred R. Roos
1948-10-29
s.n.
San Bernardino
San Bernardino Mtns., summit of Cajon Pass
1223
Comment
RSA48852
Artemisia tridentata subsp. parishii
J. C. Roos
1949-11-24
4699
Los Angeles
8 or 9 miles W of Lancaster.
732
Comment
CAS-BOT-BC93600
Artemisia tridentata subsp. tridentata
John Roos; Lucille Roos
1947-9-20
2806
Inyo
Wild Rose Canyon, Panamint Mts.
2377
Comment
CLARK-A1528-1045
Artemisia tridentata subsp. tridentata
Alfred R. Roos
1948-10-29
San Bernardino
Cajon Pass
1219
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
CLARK-A1528-7777
Asclepias albicans
John C. Roos
1965-7-23
Riverside
Eagle Mountains
Comment
CLARK-A1528-3183
Asparagus officinalis
John C. Roos
1965-9-19
San Bernardino
Loma Linda
Comment
RSA0011743
Asplenium vespertinum
J. C. Roos
1941-3-8
211
San Bernardino
Reche Canyon.
Comment
CAS-BOT-BC99233
Aster
J. C. Roos; A. R. Roos
1955-8-28
6570
Inyo
West side Owens Lake 3 miles north of Olancha
1091
Comment
CLARK-A1528-1602
Aster ascendens
John C. Roos
1946-9-21
3080
San Bernardino
San Bernardino Mountains
Comment
RSA40608
Aster ascendens
J. C. Roos
1946-9-14
3014
Riverside
Thomas Valley
1375
Comment
RSA69827
Aster bernardinus
J. C. Roos
1951-10-19
5323
Riverside
San Timoteo Canyon, El Casco.
610
Comment
RSA662534
Aster carnosus
J. C. Roos
1956-8-2
6591
San Bernardino
San Bernardino Valley [Loma Linda] north side of Hwy 99, 0.2 miles west of Waterman Ave.
Comment
CLARK-A1528-1606
Aster exilis
John C. Roos
1949-9-25
4668
San Bernardino
Loma Linda
Comment
UCR24404
Aster frondosus
John C. Roos, A. R. Roos
1955-8-28
6564
Inyo
Owens Valley, on the west side of Owens Lake, 3 miles north of Olancha
1082
Comment
SD52915
Aster frondosus
J. C. Roos, A. R. Roos
1955-8-28
6564
Inyo
West side Owens Lake, 3 miles north of Olancha.
1079
Comment
RSA44885
Aster ledophyllus
J. C. Roos
1948-9-1
3949
Siskiyou
Pass southwest of Etna
Comment
UCR19195
Aster occidentalis
John C. Roos
1952-7-30
5863
Mono
White Mountains, along Crooked Creek
2835
Comment
UCR26075
Aster occidentalis
John C. Roos
1949-7-16
4563
San Bernardino
San Bernardino Mtns., Moonridge Ski Area, Bear Valley
2256
Comment
CLARK-A1528-7793
Aster pauciflorus
John C. Roos
1949-6-28
4527
Inyo
Tecopa
426
Comment
CLARK-A1528-7794
Aster pauciflorus
John C. Roos
1949-6-28
4527
Inyo
Tecopa
426
Comment
RSA45212
Astragalus acutirostris
J. C. Roos
1949-4-30
4278
San Bernardino
Apple Valley
915
Comment
CLARK-A1528-5566
Astragalus allochrous
John C. Roos
1949-4-10
4228
Riverside
Chuckwalla Mountains
Comment
RSA444474
Astragalus allochrous var. playanus
J. C. Roos
1949-4-10
4228
Riverside
Chuckawalla Mountains: Rocky hillside about 3.5 mi. SE of Desert Center.
Comment
RSA0006712
Astragalus bicristatus
J. C. Roos
1937-5-31
491
Los Angeles
Big Pines.
Comment
CAS-BOT-BC178792
Astragalus calycosus
J. C. Roos
1947-7-11
2903
Inyo
Mohagany Flats, Panamint Mts.
2499
Comment
CLARK-A1528-5099
Astragalus calycosus
John C. Roos
1967-8-5
Inyo
Inyo Mountains
3200
Comment
UC1234829
Astragalus calycosus var. calycosus
J. C. Roos
1955-6-19
6444
Inyo
2 mi w Last Chance Spring (summit ridge Last Chance Mountains); Last Chance Mountains, w of Last Chance Spring
2529
Comment
UCR30618
Astragalus crotalariae
John C. Roos
1947-3-1
3305
Imperial
Sonoran (Colorado) Desert, Fish Springs, Salton Sink, on the W/ NW side of the Salton Sea.
-61
Comment
CLARK-A1528-2737
Astragalus didymocarpus
John C. Roos
1952-4-9
5484
Riverside
Fairmount Park
259
Comment
RSA659768
Astragalus didymocarpus
J. C. Roos
1952-4-30
5606
Riverside
Hills between Camp Haan and Riverside
518
Comment
UCR20403
Astragalus didymocarpus var. didymocarpus
John C. Roos
1952-4-9
5484
Riverside
Hill by Fairmont Park, Riverside
259
Comment
RSA45537
Astragalus didymocarpus var. dispermus
J. C. Roos
1949-3-9
4113
Riverside
Near Indio
Comment
CAS-BOT-BC186870
Astragalus gilmanii
John Roos; Lucille Roos
1947-7-13
2887
Inyo
Arcane Meadows, Panamint Mts.
3048
Comment
CAS-BOT-BC186906
Astragalus insularis var. harwoodii
J. C. Roos
1958-3-15
s.n.
Riverside
Chuckwalla Mtns., 3 miles SE of Desert Center
Comment
CAS-BOT-BC186922
Astragalus inyoensis
John C. Roos
1955-5-15
6371
Inyo
0.5 miles west of Willow Spring. Last Chance Mts.
1767
Comment
GH366290
Astragalus inyoensis
J. C. Roos
1955-5-15
6371
Unknown
0.5 miles west of Willow Spring. Last Chance Mts.
1767
Comment
UCR18983
Astragalus kentrophyta
John C. Roos, L. Roos
1952-7-26
5820
Inyo
White Mtns, east side of Reed Flat, at the head of Birch Creek
3049
Comment
UCR25677
Astragalus kentrophyta
John C. Roos, A. R. Roos
1953-8-9
5952
Inyo
Northern Mojave Desert Region, Inyo Mountains, near head of Tamarack Canyon
3049
Comment
CLARK-A1528-2747
Astragalus kentrophyta subsp. implexus
John C. Roos
1937-8-5
1034
Inyo
White Mountains
Comment
CLARK-A1528-5094
Astragalus kentrophyta subsp. implexus
John C. Roos
1952-7-26
5820
Inyo
White Mountains
3047
Comment
RSA71714
Astragalus kentrophyta var. elatus
J. C. Roos, Lucille Roos
1952-7-26
5820
Inyo
East side Reed Flat at head of Birch Creek, White Mts.
3049
Comment
CLARK-A1528-4957
Astragalus layneae
John C. Roos
1947-4-19
3464
Inyo
Dante's View
Comment
POM262989
Astragalus layneae
J. C. Roos
1937-5-30
489
San Bernardino
Adelanto, Mojave Desert.
Comment
UCR30555
Astragalus layneae
John C. Roos
1938-4-15
1624
Inyo
Owens Valley, Olancha
1115
Comment
RSA79720
Astragalus lentiginosus
J. C. Roos
1953-8-9
5965
Inyo
upper Tamarack Canyon, Inyo Mts.
3110
Comment
UCR25920
Astragalus lentiginosus
John C. Roos, Lucille Roos
1949-4-9
4211
San Bernardino
Sonoran (Colorado) Desert, [Near Freda], Freda Basin in Ward Valley, south of the Turtle Mtns
305
Comment
CLARK-A1528-5424
Astragalus lentiginosus var. fremontii
John C. Roos
1949-5-28
4341
San Bernardino
Clark Mountain Range
Comment
CAS-BOT-BC26630
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
NY675942
Astragalus lentiginosus var. semotus
J. C. Roos
1953-8-9
5965
Inyo
Upper end of Tamarack Canyon, Inyo Mountains
3109
Comment
RSA45523
Astragalus magdalenae var. peirsonii
J. C. Roos
1949-4-7
4170
Imperial
West of Yuma.
Comment
RSA44247
Astragalus minthorniae var. villosus
J. C. Roos
1949-5-29
3540
San Bernardino
Greene Mine, N side of Clark Mtn.
1585
Comment
UCR25857
Astragalus nutans
John C. Roos
1937-4-26
802
San Bernardino
Eastern Mojave Desert, Providence Mtns.
Comment
UCSB42213
Astragalus nuttallianus
Roos, John
1958-3-15
Riverside
3 miles SE of Desert Center, in the Chuckwalla Mtns.
Comment
CLARK-A1528-4931
Astragalus oophorus
John C. Roos
1948-7-2
3908
Inyo
Panamint Mountains
Comment
RSA44876
Astragalus oophorus
J. C. Roos
1948-7-3
3904
Inyo
Panamint Mountains: South of Arcane Meadows.
Comment
CLARK-A1528-1152
Astragalus tricarinatus
John C. Roos
1973-3-31
Riverside
Whitewater
457
Comment
CLARK-A1528-5528
Astragalus tricarinatus
John C. Roos
1967-3-25
Riverside
Whitewater Canyon
457
Comment
UCR23355
Athyrium filix-femina
John C. Roos
1961-8-6
s.n.
San Bernardino
San Bernardino Mountains, north slope of Green Canyon
2500
Comment
UCSB46881
Athyrium filix-femina var. cyclosorum
Roos, John
1961-8-6
San Bernardino
N. slope of Green Canyon, San Bernardino Mtns.
2499
Comment
CLARK-A1528-2295
Athysanus pusillus
John C. Roos
1947-3-21
3363
Riverside
Reche Canyon
Comment
CLARK-A1528-2518
Atriplex argentea subsp. expansa
John C. Roos
1951-9-15
5209
San Bernardino
Loma Linda
304
Comment
CLARK-A1528-2519
Atriplex argentea subsp. expansa
John C. Roos
1938-8-19
2756
San Bernardino
Loma Linda
Comment
CLARK-A1528-2533
Atriplex argentea subsp. expansa
Alfred R. Roos
1947-7-22
San Bernardino
Loma Linda
304
Comment
CLARK-A1528-2534
Atriplex argentea subsp. expansa
John C. Roos
1946-9-21
3061
San Bernardino
Lucerne Valley
914
Comment
CLARK-A1528-392
Atriplex argentea subsp. expansa
John C. Roos
1951-9-15
5209
San Bernardino
Loma Linda
304
Comment
UCR23327
Atriplex argentea subsp. expansa
Alfred R. Roos
1947-7-22
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
305
Comment
POM265718
Atriplex californica
J. C. Roos
1940-6-14
1890
Monterey
Seventeen Mile Drive.
Comment
CLARK-A1528-5656
Atriplex canescens
John C. Roos
1965-7-21
San Bernardino
Victorville
Comment
RSA659776
Atriplex canescens
J. C. Roos
1949-4-6
4157
Imperial
Near Frink.
Comment
UCR18888
Atriplex canescens
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
RSA85282
Atriplex confertifolia
J. C. Roos, A. Roos
1950-8-7
4925
Inyo
Tecopa, Eastern Mojave Desert.
Comment
UCR20332
Atriplex confertifolia
John C. Roos, A. R. Roos
1950-8-7
4925
Inyo
Northern Mojave Desert, Tecopa in Amargosa River Valley
427
Comment
UCR18789
Atriplex coronata var. notatior
John C. Roos
1952-5-14
5668
Riverside
Perris-Aguanga Basin, 1 mi SE of Perris. San Jacinto River bottomlands.
Comment
RSA92585
Atriplex coronata var. notatior
J. C. Roos
1952-5-14
5668
Riverside
San Jacinto river bottomlands 1 miles southeast of Perris.
426
Comment
CLARK-A1528-6887
Atriplex elegans subsp. fasciculata
John C. Roos
1965-7-6
San Bernardino
Barstow
Comment
CLARK-A1528-5218
Atriplex hymenelytra
John C. Roos
1937-4-25
769
San Bernardino
Amboy Crater
Comment
UCR24115
Atriplex hymenelytra
John C. Roos
1937-12-28
s.n.
Inyo
Olancha
Comment
CLARK-A1528-2522
Atriplex hymenelytra
John C. Roos
1965-7-11
Inyo
Death Valley
Comment
CAS-BOT-BC169156
Atriplex lentiformis
John Roos
1950-10-31
5022
San Bernardino
237 South Waterman Ave., San Bernardino
320
Comment
UC1010323
Atriplex lentiformis
John C. Roos
1950-10-31
5022
San Bernardino
San Bernardino San Bernardino (237 South Waterman Ave.)
320
Comment
RSA92769
Atriplex lentiformis
J. C. Roos, L. Roos
1954-9-25
6251
San Bernardino
Corner of Victoria and Lynwood Drive, norh of Patton, San Bernardino Valley.
Comment
UCR24119
Atriplex nummularia
John C. Roos
1937-9-2
2555
Los Angeles
Playa del Rey
Comment
CLARK-A1528-5408
Atriplex parryi
John C. Roos
1950-4-7
4726
Inyo
Tecopa
426
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-A1528-2497
Atriplex parryi
John C. Roos
1965-7-11
Inyo
Amargosa River
Comment
LA102296
Atriplex parryi
John C. Roos;
1965-7-11
sn
Inyo
Amargosa River
Comment
CLARK-A1528-1183
Atriplex patula subsp. hastata
John C. Roos
1949-10-1
4678
Orange
Doheney Beach
1-3
Comment
CAS-BOT-BC176482
Atriplex polycarpa
J. C. Roos; A. R. Roos
1954-8-13
6205
Inyo
West base of sand dunes, Eureka Valley
914
Comment
CAS-BOT-BC176549
Atriplex polycarpa
J. C. Roos
1965-7-6
s.n.
San Bernardino
At the cement plant, Victorville
Comment
CLARK-A1528-2548
Atriplex polycarpa
John C. Roos
1965-7-6
San Bernardino
Victorville
Comment
CLARK-A1528-2549
Atriplex polycarpa
John C. Roos
1943-12-19
2763
Riverside
Mecca Hills
Comment
CLARK-A1528-5396
Atriplex polycarpa
John C. Roos
1954-8-13
6205
Inyo
Eureka Valley
914
Comment
CLARK-A1528-7837
Atriplex polycarpa
John C. Roos
1947-1-26
3210
San Bernardino
Trona
Comment
RSA52770
Atriplex prostrata
J. C. Roos
1949-11-27
4701
Kern
Monolith Dry Lake
1204
Comment
UCR23313
Atriplex rosea
John C. Roos
1950-8-23
4946
San Bernardino
San Bernardino Valley, Loma Linda
320
Comment
UCR24093
Atriplex semibaccata
John C. Roos
1937-9-7
s.n.
Los Angeles
Westwood Village, Los Angeles
90
Comment
CLARK-A1528-2506
Atriplex serenana
John C. Roos
1946-8-26
2933
San Bernardino
Loma Linda
Comment Read comments Jan 21 2015
UCR18899
Atriplex serenana
John C. Roos
1965-8-3
s.n.
Riverside
Gilman Hot Springs
Comment
UCSB42262
Atriplex spinifera
Roos, J.
1965-9-18
San Bernardino
5 miles north of Kramer Junction; Mojave Desert
Comment
CLARK-A1528-5409
Atriplex torreyi
John C. Roos
1950-8-8
San Bernardino
Oro Grande
Comment
CLARK-A1528-40
Avena fatua
John C. Roos
1951-9-25
Riverside
Riverside
259
Comment
CLARK-A1528-4496
Avena fatua
Alfred R. Roos
1938-2-13
San Bernardino
Loma Linda
Comment
CLARK-A1528-1619
Baccharis brachyphylla
John C. Roos
1958-9-27
Riverside
San Jacinto Mountains
914
Comment
UCR19495
Baccharis brachyphylla
John C. Roos
1963-10-19
s.n.
Riverside
San Bernardino Mtns., Whitewater Wash near Painted Hill
581
Comment
CLARK-A1528-164
Baccharis douglasii
John C. Roos
1951-9-25
5284
Riverside
Riverside
259
Comment
CLARK-A1528-1622
Baccharis emoryi
John C. Roos
1937-9-12
Riverside
Santa Ana River
Comment
CLARK-A1528-165
Baccharis emoryi
John C. Roos
1951-9-25
5285
Riverside
Riverside
259
Comment
CLARK-A1528-1638
Baccharis glutinosa
John C. Roos
1951-10-24
5346
Riverside
Santa Ana River
259
Comment
CLARK-A1528-166
Baccharis glutinosa
John C. Roos
1951-10-24
5346
Riverside
Riverside
259
Comment
RSA48878
Baccharis salicifolia
J. C. Roos
1949-9-21
4664
Riverside
Reche Canyon, 2.7 miles south of Hollow Hill Dairy
457
Comment
UCR26078
Baccharis salicifolia
John C. Roos, A. R. Roos
1954-8-15
6222
Inyo
Northern Mojave Desert, Saline Valley, below mouth of Hunter Canyon
367
Comment
RSA444680
Baccharis sarothroides
J. C. Roos
1965-10-10
sn.
San Diego
8 mi East of Dulzura.
Comment
UCSB42282
Baccharis sarothroides
Roos, John
1965-9-18
Inyo
Wild Rose Canyon, Panamint Mtns.
Comment
CAS-BOT-BC99859
Baccharis sergiloides
J. C. Roos
1965-9-18
s.n.
Inyo
Wild Rose Canyon, Panamint Mtns.
Comment
CLARK-A1528-1633
Baccharis sergiloides
John C. Roos
1965-10-10
San Diego
Comment
CLARK-A1528-1634
Baccharis sergiloides
John C. Roos
1947-8-2
3731
San Bernardino
San Bernardino Mountains
1310
Comment
RSA48677
Baccharis sergiloides
J. C. Roos
1949-8-14
4618
San Bernardino
Keystone Spring, Keystone Canyon, New York Mts.
1707
Comment
UCR19179
Baccharis sergiloides
John C. Roos
1948-9-14
3003
Riverside
Santa Rosa Mtns, Dos Palmas Spring, east of Asbestos Mountain
1070
Comment
RSA301479
Bacopa eisenii
J. C. Roos
1937-8-4
1962
Inyo
Owens River, near Lone Pine.
Comment
RSA40605
Bahia dissecta
J. C. Roos
1946-8-27
2923
Riverside
Santa Rosa Mountains.
2287
Comment
UCR26076
Bahia dissecta
John C. Roos
1946-8-27
2923
Riverside
Peninsular Range, Santa Rosa Mtns
2287
Comment
CLARK-A1528-7861
Barbarea orthoceras
John C. Roos
1947-5-31
3664
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-403
Bassia hyssopifolia
John C. Roos
1951-9-15
5206
San Bernardino
Loma Linda
304
Comment
UCSB45938
Bassia hyssopifolia
Roos, John
1965-7-3
San Bernardino
Loma Linda
Comment
CLARK-A1528-1648
Bebbia juncea
John C. Roos
1995-6-19
Riverside
Santa Ana Mountains
Comment
RSA450419
Bebbia juncea
J. C. Roos
1965-6-19
s.n.
Riverside
Skyline Drive, S of Corona
Comment
CLARK-A1528-1649
Bellis perennis
John C. Roos
1965-6-21
San Bernardino
San Gabriel Mountains
Comment
CLARK-A1528-5632
Berberis dictyota
John C. Roos
1947-1-31
3215
Riverside
Reche Canyon
Comment
UCR23382
Berberis haematocarpa
John C. Roos
1949-6-22
4437
San Bernardino
Eastern Mojave Desert, New York Mtns., at and near Lecyr Well
1524
Comment
CLARK-A1528-4876
Berberis nevinii
John C. Roos
1937-2-27
476
San Bernardino
San Timoteo Canyon
Comment
LA102288
Berberis nevinii
J. C. Roos;
1966-2-10
sn
San Bernardino
San Timoteo Canyon, S of Redlands
Comment
UC1494263
Berberis nevinii
J. C. Roos
1996-2-10
San Bernardino
s Redlands (San Timoteo Canyon)
Comment Read comments Oct 23 2014
POM251784
Bernardia incana
J. C. Roos
1936-4-5
s.n.
San Diego
San Felipe Valley.
Comment Read comments Sep 29 2009
UCR18798
Betula occidentalis
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mountains, Independence Creek [near Onion Valley]
2896
Comment
CLARK-A1528-5452
Bidens frondosa
John C. Roos
1951-9-25
5265
Riverside
Riverside
259
Comment
UCR30556
Bidens frondosa
John C. Roos
1948-9-1
3942
Siskiyou
Marsham Stream at Yreka
Comment
CLARK-A1528-1653
Bidens pilosa
John C. Roos
1951-9-25
5264
Riverside
Riverside
259
Comment
CLARK-A1528-1654
Bidens pilosa
John C. Roos
1965-8-18
Riverside
Corona
Comment
UCR23741
Bidens pilosa
John C. Roos
1965-8-18
s.n.
Riverside
In Corona
Comment
CLARK-A1528-1518
Bloomeria crocea
John C. Roos
1958-5-2
Los Angeles
Brentwood
Comment
CLARK-A1528-1519
Bloomeria crocea
John C. Roos
1947-5-11
3606
Los Angeles
Pomona
Comment
GH378785
Boechera lemmonii
J. C. Roos & L. Roos
1951-8-10
5144
Unknown
east face White Mtn. Peak, White Mts.
4145
Comment
POM251754
Boerhavia
J. C. Roos
1937-8-20
12
Riverside
East of Desert Center.
Comment
RSA158110
Boerhavia annulata
J. C. Roos
1955-7-23
6510
Inyo
Mouth of Beveridge Canyon, east base Inyo Mts., Saline Valley
610
Comment
UCR23447
Boerhavia annulata
John C. Roos
1955-5-13
6350
Inyo
Northern Mojave Desert, west base of Last Chance Mountains, east of Eureka Valley sand dunes
1280
Comment
CLARK-A1528-3272
Boerhavia wrightii
John C. Roos
1937-8-20
Riverside
Desert Center
Comment
RSA41282
Boerhavia wrightii
J. C. Roos
1937-8-22
14
Riverside
Colorado River, north of Blythe.
Comment
RSA449949
Boerhavia wrightii
J. C. Roos
1937-8-20
s.n.
Riverside
East of Desert Center.
Comment
UC1010320
Boerhavia wrightii
John and Lucille Roos
1950-10-21
5018
San Bernardino
Mohave Desert, Twenty-nine Palms
579
Comment
UCR19111
Boerhavia wrightii
John C. Roos
1965-9-5
s.n.
Riverside
Sonoran (Colorado) Desert, Desert Center
Comment
CLARK-A1528-4501
Bothriochloa barbinodis
John C. Roos
1947-2-15
3236
Riverside
Eagle Mountains
Comment
CLARK-A1528-5154
Bothriochloa barbinodis
John C. Roos
1947-2-15
3236
Riverside
Eagle Mountains
Comment
UCR23358
Botrychium simplex
John C. Roos
1967-6-25
s.n.
San Bernardino
San Bernardino Mountains, Fish Creek Meadows
Comment
UCR26315
Botrychium simplex
John C. Roos
1960-7-11
s.n.
Mono
White Mountains, Crooked Creek.
2888
Comment
CAS-BOT-BC145587
Bouteloua aristidoides
J. C. Roos
1965-9-5
s.n.
Riverside
Desert Center.
Comment
CLARK-A1528-4507
Bouteloua aristidoides
John C. Roos
1937-8-22
478
Riverside
Comment
UCR23965
Bouteloua aristidoides
John C. Roos
1946-9-14
3026
Riverside
Santa Rosa Mtns., Pinyon Flats
1220
Comment
UCR23966
Bouteloua aristidoides
John C. Roos
1949-3-19
4110
Riverside
Sonoran (Colorado) Desert, Mouth of Shaver's Wash near Mecca
Comment
UCSB51393
Bouteloua aristidoides
Roos, John
1946-9-14
Riverside
Pinyon Flats, Santa Rosa Mtns
1219
Comment Read comments Apr 3 2011
LA102177
Bouteloua aristidoides var. aristidoides
John C. Roos;
1946-10-26
3139
Riverside
Chuckwalla Mountains
Comment
POM266615
Bouteloua barbata
J. C. Roos
1937-8-20
1227
Riverside
Blythe
Comment
CLARK-A1528-4515
Bouteloua curtipendula
John C. Roos, Alfred R. Roos
1950-8-5
4901
San Bernardino
Clark Mountains
1645
Comment
RSA41332
Bouteloua curtipendula
J. C. Roos
1948-5-2
1122
Riverside
Wonderland of Rocks, Joshua Tree National Monument.
Comment
RSA44268
Bouteloua curtipendula
J. C. Roos
1949-6-18
3551
San Bernardino
Southeastern base of Clark Mountain, eastern Mojave Desert.
1829
Comment
RSA47325
Bouteloua curtipendula
J. C. Roos, L. Roos
1949-6-22
4442
San Bernardino
Mouth of Keystone Canyon, New York Mountains
1677
Comment
RSA450458
Bouteloua eriopoda
J. C. Roos
1950-8-4
4890
San Bernardino
N side of Clark Mountain, east Mojave Desert.
Comment Read comments Aug 11 2011
RSA47326
Bouteloua eriopoda
J. C. Roos, Lucille Roos
1949-6-23
4462
San Bernardino
Lanfair Valley, north of Hackberry Mountain.
1311
Comment
UC1023410
Bouteloua eriopoda
J. C. and A. R. Roos
1950-8-4
4890
San Bernardino
n slopes Clark Mtn.; eastern Mohave Desert
1219
Comment
POM263104
Bouteloua gracilis
J. C. Roos
1937-7-27
326
San Bernardino
East end of Bear Valley, San Bernardino Mountains
Comment
UCR23916
Bouteloua gracilis
John C. Roos
1946-9-28
3089
San Bernardino
San Bernardino Mtns., Upper Santa Ana Canyon, at the South Fork Public Camp
1936
Comment
UCR25778
Bowlesia incana
John C. Roos
1952-4-13
5536
Riverside
N side of the Box Springs Mountains
457
Comment
POM265673
Boykinia rotundifolia
J. C. Roos
1942-8-15
1753
San Bernardino
Hillside south of and below Crestline.
Comment
POM265674
Boykinia rotundifolia
J. C. Roos
1937-7-15
2422
San Bernardino
Bonita Falls, Lytle Creek.
Comment
CLARK-A1528-5666
Brandegea bigelovii
John C. Roos
1960-4-8
Riverside
380
Comment
CLARK-A1528-5504
Brickellia arguta
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
RSA105038
Brickellia arguta
J. C. Roos
1955-5-13
6337
Inyo
West base Last Chance Mountains, east of Eureka Valley sand dunes
1220
Comment
UC1236250
Brickellia atractyloides
John C. Roos
1955-5-13
6337
Inyo
e of Eureka Valley sand dunes; Last Chance Mts. (west base)
1219
Comment
RSA48875
Brickellia californica
J. C. Roos
1949-9-3
4649
San Bernardino
Tecopa Pass, Kingston Mountains.
1524
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
CAS-BOT-BC106184
Brickellia desertorum
John Roos; Lucille Roos
1950-9-9
4986
Riverside
Mt. Rubidoux, Riverside
396
Comment
CAS-BOT-BC106189
Brickellia desertorum
John C. Roos
1950-10-15
5009
Riverside
Dry Morongo Canyon about 1 mile south of Riverside-San Bernardiino County line.
609
Comment
CAS-BOT-BC106190
Brickellia desertorum
John Roos; Lucille Roos
1950-10-14
5006
Riverside
East end Jurupa Hills near corner of Alta and Canal Sts., West Riverside
304
Comment
CLARK-A1528-1663
Brickellia desertorum
John C. Roos
1949-9-21
4665
Riverside
Reche Canyon
457
Comment
CLARK-A1528-1664
Brickellia desertorum
John C. Roos
1949-9-17
4662
Riverside
Whitewater Canyon
609
Comment
POM302522
Brickellia desertorum
J. C. Roos
1943-8-17
2709
San Bernardino
Reche Canyon, off San Bernardino Valley
Comment
RSA52805
Brickellia desertorum
J. C. Roos, L. Roos
1950-9-9
4986
San Bernardino
Mt. Rubidoux.
396
Comment
RSA89894
Brickellia desertorum
J. C. Roos, L. Roos
1950-10-28
5020
Riverside
N base Mt. Russell, 1 mi SE of Moreno.
550
Comment
RSA89966
Brickellia desertorum
J. C. Roos
1950-10-15
5009
Riverside
San Bernardino Mtns. Dry Morongo Canyon, c. l mi south of Riverside-San Bernardino county line.
612
Comment
UCR23270
Brickellia desertorum
John C. Roos, L. Roos
1950-10-28
5020
Riverside
Perris-Aguanga basin region, N base Mt. Russell, 1 mi SE of Moreno
550
Comment
UCR23273
Brickellia desertorum
John C. Roos, L. Roos
1950-9-9
4986
Riverside
Mt. Rubidoux.
400
Comment
UCSB51163
Brickellia desertorum
Roos, John
1943-8-17
San Bernardino
Reche Canyon, San Bernardino Valley
Comment
RSA44888
Brickellia greenei
J. C. Roos
1948-9-2
3975
Siskiyou
5 mi SW of Yreka.
Comment
UCR19259
Brickellia greenei
John C. Roos
1948-9-2
3975
Siskiyou
5 mi SW of Yreka
Comment
UCSB37839
Brickellia greenei
Roos, John
1948-9-2
Siskiyou
5 miles S.W. of Yreka
Comment
CAS-BOT-BC100515
Brickellia incana
J. C. Roos
1965-6-23
s.n.
Riverside
Colorado Desert. Lost Palms Wash, north of Chiriaco Summit near the Eagle Mtns.
Comment
CLARK-A1528-1673
Brickellia incana
John C. Roos
1947-11-1
3751
Riverside
Eagle Mountains
Comment
CLARK-A1528-1674
Brickellia incana
John C. Roos
1947-4-18
3452
San Bernardino
Cronese Lake
Comment
UCR30496
Brickellia microphylla
John C. Roos, A. R. Roos
1953-8-14
6029
Inyo
Northern Mojave Desert, Inyo Mtns., Al Rose Canyon
2141
Comment
CLARK-A1528-1686
Brickellia multiflora
John C. Roos, Lucille Roos
1947-9-20
2813
Inyo
Panamint Range
1249
Comment
CLARK-A1528-7785
Brickellia oblongifolia var. linifolia
John C. Roos
1946-10-5
3116
San Bernardino
San Bernardino Mountains
2285
Comment
RSA47480
Brickellia oblongifolia var. linifolia
J. C. Roos, L. Roos
1949-6-24
4473
San Bernardino
Summit of Clark Mountain
2409
Comment
RSA79642
Brickellia oblongifolia var. linifolia
J. C. Roos, A. R. Roos
1953-8-10
5982
Inyo
branch of Mazourka Canyon, Inyo Mts.
2561
Comment
RSA47451
Brickellia oblongifolia var. linifolia
J. C. Roos, L. Roos
1949-6-27
4519
San Bernardino
North slope of Kingston Mts.
1768
Comment
CAS-BOT-BC132193
Brodiaea filifolia
John C. Roos
1952-5-14
5667
Riverside
San Jacinto River bottom 1 mile east of Perris
426
Comment
CLARK-A1528-1522
Brodiaea filifolia
John C. Roos
1952-5-14
5667
Riverside
San Jacinto River
426
Comment
RSA92586
Brodiaea filifolia
J. C. Roos
1952-5-14
5667
Riverside
San Jacinto River bottom 1 mile east of Perris.
Comment
CLARK-A1528-2793
Brodiaea lutea var. anilina
John C. Roos
1951-5-27
5049
Mariposa
Mariposa
1005
Comment
CLARK-A1528-4530
Bromus arenarius
John C. Roos
1949-6-22
3547
San Bernardino
New York Mountains
1737
Comment
RSA85126
Bromus arizonicus
J. C. Roos
1952-4-9
5473
Riverside
east base of Mt. Rubidoux
274
Comment
UCR20584
Bromus arizonicus
John C. Roos
1952-4-9
5473
Riverside
Riverside, E base of Mt. Rubidoux
274
Comment
POM266278
Bromus carinatus
J. C. Roos
1937-6-18
1239
San Diego
Palomar Mountain.
Comment
SEINET901505
Bromus carinatus
J. C. Roos
1949-1
4494
San Bernardino
Along Damp canyon bottom near a spring, E. slope of Clark Mt., Eastern Mojave desert
1524
Comment
UCR32865
Bromus carinatus
John C. Roos
1949-6-25
4494
San Bernardino
Eastern Mojave Desert, east slope of Clark Mountain [probably Colosseum Gorge]
1524
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
CAS-BOT-BC148734
Bromus carinatus var. marginatus
J. C. Roos
1965-7-17
s.n.
San Bernardino
San Bernardino Mountains. Barton Flats.
Comment
LA102184
Bromus japonicus
John C. Roos;
1950-6-11
4830
San Bernardino
Loma Linda, W central
304
Comment
POM302534
Bromus japonicus
J. C. Roos
1943-6-22
2711
San Bernardino
edge of Lawn, County Hospital
Comment
UCSB71632
Bromus madritensis subsp. rubens
Roos, J.
1965-6-6
San Bernardino
Mill Creek, San Bernardino Mtns, near Fallsvale
Comment
POM266277
Bromus maritimus
J. C. Roos
1940-6-12
833
San Francisco
San Francisco
Comment
CLARK-A1528-4545
Bromus mollis
John C. Roos, Lucille Roos
1950-4-15
4740
Riverside
Pigeon Pass
457
Comment
UCR23872
Bromus richardsonii
John C. Roos
1940-7-30
1576
San Bernardino
San Bernardino Mtns., Bear Valley near Boulder Bay
2134
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-A1528-4550
Bromus rubens
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4555
Bromus rubens
John C. Roos, Lucille Roos
1950-4-15
4739
Riverside
Pigeon Pass
457
Comment
CLARK-A1528-1276
Bromus tectorum
John C. Roos
1948-7-4
Inyo
Panamint Mountains
Comment
CLARK-A1528-4560
Bromus trinii
John C. Roos
1969-5-10
Kern
Red Rock Canyon
Comment
UCR23968
Bromus trinii
John C. Roos
1942-5-2
1120
Riverside
Little San Bernardino Mountains, Live Oak Tank
1280
Comment
UCR23981
Bromus trinii
John C. Roos
1969-5-10
s.n.
Kern
Western Mojave Desert, Red Rock Canyon
793
Comment
RSA47193
Buddleja utahensis
J. C. Roos, Lucille Roos
1949-6-26
4497
San Bernardino
Pass in mountains 5.5 miles south of Kingston.
1067
Comment
UCR18980
Caesalpinia virgata
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
UCR30533
Calamagrostis muiriana
John C. Roos
1948-9-7
4011
Tuolumne
Sierra Nevada Mtns., Yosemite National Park, Tuolumne Meadows
2622
Comment Read comments Aug 26 2011
UCR19364
Calamagrostis nutkaensis
John C. Roos
1950-7-22
4869
Sonoma
North Coast, Jenner, slopes above sea bluffs
61
Comment
CLARK-A1528-3811
Calandrinia ambigua
John C. Roos
1949-5-5
4098
Riverside
Orocopia
Comment
RSA85454
Callitriche marginata
J. C. Roos
1952-4-16
5540
Riverside
Edgemont, near Box Springs.
488
Comment
CLARK-A1528-2664
Calocedrus decurrens
John C. Roos
1942-12-25
2589
Mariposa
Sierra National Forest
1036-1219
Comment
RSA450207
Calochortus amabilis
J. C. Roos
1939-3-27
305
Napa
Snell Valley, Pacific Union College, Angwin
Comment
RSA71717
Calochortus bruneaunis
J. C. Roos
1952-7-26
5823
Inyo
East side Reed Flat at head of Birch Creek, White Mts.
3049
Comment
CAS-BOT-BC487782
Calochortus bruneaunis
J. C. Roos
1955-6-17
6410
Inyo
2 miles NE of Willow Spring, Last Chance Mountains
2011
Comment
RSA450178
Calochortus catalinae
J. C. Roos
1956-4-8
6573
Ventura
North slope of ''Bony Mountain'' [Boney Mountain]. Potrero Valley
Comment
POM263553
Calochortus concolor
J. C. Roos
1937-6-11
629
San Diego
Campo.
Comment
CLARK-A1528-3188
Calochortus invenustus
John C. Roos
1950-6-24
4841
San Bernardino
San Bernardino Mountains
2224
Comment
CLARK-A1528-3189
Calochortus invenustus
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR19737
Calochortus invenustus
John C. Roos
1953-7-4
5926
San Bernardino
San Bernardino Mtns., Barton Flats near store
1921
Comment
CLARK-A1528-3190
Calochortus kennedyi
John C. Roos
1949-4-30
4264
San Bernardino
Hesperia
914
Comment
UCR24142
Calochortus pulchellus
John C. Roos
1939-4-18
278
Napa
North Coast Range, Pope Valley Grade, Angwin
500
Comment Read comments Feb 17 2006
POM262959
Calochortus splendens
J. C. Roos
1941-5-6
135
San Bernardino
Near Loma Linda.
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
UCSB46873
Calochortus striatus
Roos, John
1969-5-10
Kern
Red Rock Canyon
Comment
CLARK-A1528-1794
Calycadenia tenella
John C. Roos
1952-7-19
5816
Riverside
Santa Ana Mountains
761
Comment
UCR25993
Calycanthus occidentalis
John C. Roos
1948-8-30
3925
Shasta
Castle Crag
Comment
CLARK-A1528-3817
Calyptridium umbellatum
John C. Roos, Lucille Roos
1951-8-10
5152
Mono
White Mountains
4023
Comment
CLARK-A1528-3820
Calyptridium umbellatum
John C. Roos
1936-5-9
San Bernardino
San Bernardino Mountains
Comment
UCR25934
Calystegia fulcrata
John C. Roos
1949-7-16
4565
San Bernardino
San Bernardino Mtns., Moonridge Ski Area, Bear Valley
2256
Comment
CLARK-A1528-3325
Camissonia cheiranthifolia
Alfred R. Roos
1956-5-22
Los Angeles
9
Comment
UCR23517
Camissonia confusa
John C. Roos
1943-5-23
2662
Riverside
S Mojave Desert, Little San Bernardino Mtns
1524
Comment
RSA85157
Camissonia intermedia
J. C. Roos
1952-4-16
5546
Riverside
Reche Canyon.
457
Comment
CLARK-A1528-3361
Camissonia strigulosa
John C. Roos
1965-6-13
Riverside
San Jacinto Mountains
Comment
POM302488
Camissonia strigulosa
J. C. Roos
1943-8-8
2703
Riverside
Dry flat, Hall Canyon, San Jacinto Mts.
1768
Comment
CLARK-A1528-3406
Canbya candida
John C. Roos, Lucille Roos
1952-5-10
5633
San Bernardino
Mojave Desert
Comment
UCR23551
Cardamine debilis
Alfred R. Roos
1958-6-12
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR24104
Carex douglasii
John C. Roos
1943-10-16
2739
Riverside
Southern Mojave Desert, Falcon Flats, Little San Bernardino Mtns
1524
Comment
RSA48687
Carex subfusca
J. C. Roos
1949-8-13
4606
San Bernardino
Copper Queen Mine, Keystone Canyon, New York Mountains
1829
Comment
CLARK-A1528-1691
Carthamus tinctorius
John C. Roos
1965-7-7
Riverside
Beaumont
Comment
UCR18581
Carthamus tinctorius
John C. Roos, L. Roos
1959-9-2
6599
Sonoma
North Coast Ranges, Healdsburg, Healdsburg dump
Comment
CLARK-A1528-4171
Castilleja affinis
John C. Roos
1966-4-5
Riverside
Winchester
Comment
RSA450156
Castilleja affinis
J. C. Roos
1966-4-5
s.n.
Riverside
Winchester
Comment Read comments Mar 20 2011
CLARK-A1528-1228
Castilleja affinis subsp. affinis
John C. Roos
1937-6-10
1480
San Diego
Jacumba
853
Comment
UCSB42128
Castilleja affinis subsp. affinis
Roos, John
1966-4-5
Riverside
Winchester
Comment
UCR25193
Castilleja attenuata
John C. Roos
1951-5-26
5036
Mariposa
Sierra Nevada Mtns, hills about 7 miles east of Mariposa
1037
Comment
SD65502
Castilleja cinerea
John C. Roos
1943-7-4
2717
San Bernardino
ridge summit of Sugerloaf Peak, San Bernardino Mts
2987
Comment
UCSB45534
Castilleja exserta subsp. exserta
Roos, John
1941-4-19
Riverside
Reche Canyon - "Plateau"
Comment
CLARK-A1528-4177
Castilleja foliolosa
John C. Roos
1940-5-4
880
Riverside
San Timoteo Canyon
Comment
RSA659605
Castilleja nana
J. C. Roos
1967-8-5
s.n.
Inyo
Summit Ridge eadt of Badger flat.
3201
Comment
UC1023408
Castilleja nana
J. C. and A. R. Roos
1953-8-9
5960
Inyo
near head of Tamarack Canyon; Inyo Mountains
3048
Comment
UCR25811
Castilleja plagiotoma
John C. Roos
1949-4-30
4263
San Bernardino
Mojave Desert, 6 mi. SW of Hesperia
1067
Comment
UCR19074
Castilleja tenuis
John C. Roos
1940-7-16
1848
San Bernardino
San Bernardino Mtns., Green Valley
Comment
CLARK-A1528-2305
Caulanthus crassicaulis
John C. Roos
1954-6-28
6168
Inyo
Inyo Mountains
2255
Comment
CAS-BOT-BC41003
Caulanthus crassicaulis
John C. Roos; Lucille Roos
1954-6-28
6168
Inyo
Inyo Mountains. Southwest slope Little Cowhorn Valley.
2255
Comment
CAS-BOT-BC41005
Caulanthus crassicaulis
J. C. Roos
1955-6-21
6470
Inyo
Inyo Mountains. Little Cowhorn Valley.
2255
Comment
UCR30594
Caulanthus heterophyllus var. heterophyllus
John C. Roos, L. Roos
1954-4-10
6065
San Diego
Peninsular Range, San Pasqual
152
Comment
CAS-BOT-BC40451
Caulanthus inflatus
John Roos; Lucille Roos
1952-5-10
5629
San Bernardino
Mohave Desert. Kremer Hills.
853
Comment
POM265804
Ceanothus crassifolius
J. C. Roos
1942-3-7
1105
Los Angeles
Big Tujunga Canyon.
Comment
CLARK-A1528-3885
Ceanothus cuneatus
John C. Roos
1937-3-26
1666
Santa Barbara
Cuyama Valley
Comment
CLARK-A1528-3893
Ceanothus greggii
John C. Roos
1967-5-13
San Bernardino
San Bernardino Mountains
914
Comment
RSA47547
Ceanothus greggii var. vestitus
J. C. Roos, Lucille Roos
1949-6-20
4421
San Bernardino
Keystone Canyon, New York Mts
1829
Comment
CLARK-A1528-3894
Ceanothus integerrimus
John C. Roos
1937-6-5
934
San Bernardino
San Bernardino Mountains
Comment
POM265805
Ceanothus oliganthus var. oliganthus
J. C. Roos
1942-3-21
1097
Los Angeles
Chantry Flats, Santa Anita Canyon
Comment
POM265806
Ceanothus spinosus
J. C. Roos
1942-3-14
997
Los Angeles
Sepulveda Canyon, W Los Angeles
Comment
CLARK-A1528-5085
Ceanothus tomentosus subsp. olivaceus
John C. Roos
1966-3-31
San Bernardino
San Timoteo Canyon
304
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
RSA0057839
Cenchrus ciliaris
J. C. Roos
1965-10-17
Riverside
Along the roadside, 20 miles west of Blythe.
Comment
POM263010
Cenchrus longispinus
J. C. Roos
1940-8-31
234
San Bernardino
Near Cucamonga.
Comment
UCR23280
Centaurea repens
John C. Roos
1950-10-27
5019
San Bernardino
San Bernardino Valley, San Bernardino, corner of 9th Street and Waterman Avenue
336
Comment
UCR23330
Centaurea repens
John C. Roos
1948-10-16
s.n.
San Bernardino
San Bernardino Valley, Wildwood Canyon [=Yucaipa Creek, becomes Live Oak Canyon] near San Timoteo Canyon
Comment
UCR26085
Centaurea repens
John C. Roos, L. Roos
1951-10-24
5335
Riverside
City of Riverside, between Arlington area and Pedley
229
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
CLARK-A1528-2942
Centaurium exaltatum
John C. Roos
1937-8-10
1047
Kern
Kern River
Comment
RSA662536
Centaurium floribundum
J. C. Roos
1957-7-3
6652
Sonoma
Healdsberg
Comment
CLARK-A1528-2946
Centaurium venustum
John C. Roos
1952-6-13
5766
Riverside
Reche Canyon
457
Comment
CLARK-A1528-5249
Centaurium venustum
John C. Roos
1948-4-24
3797
Riverside
Whitewater
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
RSA92605
Cerastium fontanum
J. C. Roos
1952-5-12
5658
San Bernardino
Loma Linda
320
Comment Read comments Jan 24 2010
UCR23698
Cerastium fontanum subsp. vulgare
John C. Roos
1946-9-28
3098
San Bernardino
San Bernardino Mtns., Near Fish Creek
2241
Comment
POM265645
Cerastium fontanum subsp. vulgare
J. C. Roos
1937-3-8
1303
San Bernardino
Loma Linda, San Bernardino Valley.
Comment
CLARK-A1528-2780
Cercidium microphyllum
John C. Roos
1949-4-9
4209
San Bernardino
Whipple Mountains
Comment
RSA497910
Cercocarpus betuloides var. betuloides
A. R. Roos
1922-11-8
s.n.
Los Angeles
San Gabriel Mountians: Lytle Creek Canyon
915
Comment Read comments Aug 18 2012
UC1234831
Cercocarpus intricatus
J. C. Roos
1955-6-19
6452
Inyo
2 mi w of Last Chance Spring (summit ridge of Last Chance Mountains); Last Chance Mountains
2560
Comment
RSA92174
Cercocarpus intricatus
J. C. Roos, L. Roos
1954-6-26
6157
Inyo
Tamarack Canyon, Inyo Mountains
2744
Comment
SD52931
Cercocarpus intricatus
J. C. Roos
1955-6-19
6452
Inyo
Summit ridge of Last Chance Mountains, 2 miles west of Last Chance Spring.
2560
Comment
CLARK-A1528-3983
Cercocarpus ledifolius
John C. Roos
1965-6-6
San Bernardino
Mill Creek
Comment
RSA450098
Cercocarpus ledifolius
J. C. Roos
1965-6-6
s.n.
San Bernardino
San Bernardino Mtns, Mill Creek near Fallsvale.
Comment
RSA79485
Cercocarpus ledifolius
J. C. Roos, A. R. Roos
1953-8-13
6009
Inyo
Tamarack Canyon.
2744
Comment
CLARK-A1528-5000
Chaenactis artemisiifolia
John C. Roos
1937-5-10
2070
Riverside
Comment Read comments Jun 24 2014
CAS-BOT-BC276557
Chaenactis douglasii var. douglasii
J. C. Roos
1955-6-17
6415
Inyo
2 miles NE of Willow Spring, Last Chance Mountains
2011
Comment
POM261402
Chaenactis douglasii var. douglasii
J. C. Roos
1941-08
51
Inyo
Panamint Mts
3201
Comment Read comments Jun 20 2012
CLARK-A1528-1697
Chaenactis glabriuscula
John C. Roos
1937-3-26
2478
Santa Barbara
Cuyama Valley
Comment
CLARK-A1528-2045
Chaenactis glabriuscula
John C. Roos
1941-4-26
157
San Bernardino
Comment
CAS-BOT-BC106010
Chaetadelpha wheeleri
J. C. Roos; A. R. Roos
1954-8-13
6208
Inyo
Southeast end Eureka Valley
944
Comment
RSA104137
Chaetadelpha wheeleri
J. C. Roos
1955-5-13
6364
Inyo
West side Eureka Valley at mouth of Marble Canyon.
1037
Comment
LA203100
Chaetadelpha wheeleri
John C. Roos; Lucille Roos
1954-6-28
6174
Inyo
Eureka Valley, Leo Carrillo State Beach, SE-end
929
Comment
CLARK-A1528-5238
Chaetopappa aurea
John C. Roos
1943-4-11
2609
San Bernardino
Santa Ana River
Comment
UCR19510
Chaetopappa aurea
John C. Roos
1965-7-22
s.n.
Riverside
San Jacinto Mtns, near Mountain Center
1372
Comment
RSA72074
Chamaebatiaria millefolium
J. C. Roos, L. Roos
1951-8-12
5188
Inyo
1.5 miles South of Reed Flat, White Mts.
2896
Comment
RSA659482
Chamaesaracha coronopus
J. C. Roos
1949-6-22
3548
San Bernardino
Barnwell, New York Mountains.
Comment
POM262918
Chamaesyce albomarginata
J. C. Roos
1937-6-8
628
San Diego
San Felipe Valley.
Comment
RSA52780
Chamaesyce revoluta
J. C. Roos
1950-8-4
4891
San Bernardino
North side of Clark Mtn.
1220
Comment
UCR23360
Cheilanthes feei
John C. Roos
1955-5-16
6386
Inyo
Inyo Mountains, narrow canyon 1.5 mi SW of Loretto Mine along Loretto Rd.
1677
Comment
POM301706
Cheilanthes newberryi
J. C. Roos
1938-5-2
1412
Riverside
hills near La Sierra, western Riverside Co.
Comment
RSA47331
Cheilanthes wootonii
J. C. Roos, Lucille Roos
1949-6-22
4441
San Bernardino
New York Mountains, N side of the mouth of Keystone Canyon
1677
Comment
CLARK-A1528-2553
Chenopodium album
John C. Roos
1947-8-17
Los Angeles
San Fernando Valley
Comment
CLARK-A1528-2554
Chenopodium album
John C. Roos
1965-7-4
San Bernardino
Loma Linda
304
Comment
CLARK-A1528-5122
Chenopodium ambrosioides var. anthelminticum
John C. Roos
1965-8-4
Riverside
Comment
UCR23310
Chenopodium californicum
John C. Roos
1952-4-16
5560
Riverside
Box Springs Mountains, Pigeon Pass
366
Comment
CLARK-A1528-2563
Chenopodium incanum
John C. Roos
1949-6-22
4456
San Bernardino
New York Mountains
1493
Comment
CLARK-A1528-2564
Chenopodium incanum
John C. Roos
1950-9-1
4960
San Bernardino
Clark Mountains
1645
Comment
RSA85647
Chenopodium incanum var. occidentale
J. C. Roos, A. Roos
1950-8-7
4922
San Bernardino
Drainage from watering trough at Beck s Spring, Kingston MTs.
1372
Comment
UCR25948
Chenopodium incanum var. occidentale
John C. Roos
1938-4-18
1639
San Bernardino
Mojave Desert, Cronese Lake
305
Comment
RSA158114
Chenopodium leptophyllum
J. C. Roos
1955-7-23
6506
Inyo
Soldier Flat at east base Waucoba Mountain, Inyo Mountains.
2195
Comment
RSA71767
Chenopodium leptophyllum
J. C. Roos, L. Roos
1951-8-8
5112
Inyo
North rim Reed Flat, White Mts.
3140
Comment
CLARK-A1528-2573
Chenopodium pumilio
John C. Roos
1965-7-4
San Bernardino
Loma Linda
Comment
CLARK-A1528-2569
Chenopodium pumilio
John C. Roos
1942-6-17
1276
Los Angeles
West Los Angeles
Comment
RSA591740
Chenopodium pumilio
J. C. Roos
1965-7-4
s.n.
San Bernardino
Loma Linda.
Comment
UCR18970
Chenopodium rubrum
John C. Roos
1965-9-18
s.n.
Inyo
Northern Mojave Desert, Darwin Mesa [=Darwin Plateau]
Comment
UCR19734
Chenopodium rubrum
John C. Roos, L. Roos
1954-11-23
6258
Inyo
SW side of Salt Lake, Saline Valley
323
Comment
CLARK-A1528-2574
Chenopodium rubrum
John C. Roos
1954-11-23
6258
Inyo
Saline Valley
323
Comment
CLARK-A1528-5416
Chenopodium rubrum
John C. Roos
1954-8-15
6223
Inyo
Saline Valley
323
Comment
RSA45491
Chenopodium vulvaria
J. C. Roos
1948-9-1
3985
Siskiyou
Fort Jones.
Comment
POM266290
Chloracantha spinosa
J. C. Roos
1937-8-30
2223
San Diego
San Ysidro
Comment
CLARK-A1528-1256
Chloris gayana
John C. Roos, Alfred R. Roos
1950-9-16
4987
Los Angeles
Los Angeles
60
Comment
UCR23855
Chloris gayana
John C. Roos
1965-9-16
s.n.
Riverside
San Jacinto
Comment
CLARK-A1528-3597
Chorizanthe brevicornu
John C. Roos
1948-4-24
3794
Riverside
Whitewater
548
Comment
RSA155683
Chorizanthe brevicornu var. spathulata
J. C. Roos
1955-6-20
6459
Inyo
Last Chance Mountains 2 miles NE of Willow Spring.
Comment
RSA44875
Chorizanthe brevicornu var. spathulata
J. C. Roos
1948-7-3
3902
Inyo
Panamint Mountains: South of Arcane Meadows.
3049
Comment
UCR24251
Chorizanthe leptoceras
John C. Roos
1950-6-3
4822
San Bernardino
San Bernardino Mtns., Cajon Canyon, 1 mile below 'Blue Cut
Comment
CLARK-A1528-3602
Chorizanthe parryi
John C. Roos
1950-5-27
4819
Riverside
Reche Canyon
761
Comment
POM265700
Chorizanthe uniaristata
J. C. Roos
1937-4-23
1807
Riverside
At Whitewater.
Comment
UCR27545
Chorizanthe xanti
John C. Roos
1948-5-8
3827
Riverside
San Bernardino Mtns, Whitewater
579
Comment
CLARK-A1528-2050
Chrysanthemum coronarium
Alfred R. Roos
1956-5-22
Los Angeles
El Segundo
Comment
RSA431201
Chrysanthemum leucanthemum
J. C. Roos
1966-6-26
s.n.
San Bernardino
Private residence in City of Loma Linda.
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-A1528-1771
Chrysopsis villosa
John C. Roos
1965-8-18
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-1112
Chrysothamnus albidus
John C. Roos
1954-8-15
6224
Inyo
Saline Valley
426
Comment
CLARK-A1528-1705
Chrysothamnus albidus
John C. Roos
1954-8-15
6224
Inyo
Saline Valley
426
Comment
CLARK-A1528-1711
Chrysothamnus nauseosus
John C. Roos
1951-10-6
5318
San Bernardino
San Bernardino Mountains
1828
Comment
CLARK-A1528-1717
Chrysothamnus nauseosus
John C. Roos
1954-8-14
6215
Inyo
Inyo Mountains
2316
Comment
CLARK-A1528-1720
Chrysothamnus nauseosus
John C. Roos
1946-9-28
3097
San Bernardino
San Bernardino Mountains
2255
Comment
CLARK-A1528-5462
Chrysothamnus nauseosus
John C. Roos, Lucille Roos
1950-10-17
5010
San Bernardino
San Bernardino
320
Comment
UCR19479
Chrysothamnus nauseosus
John C. Roos
1948-9-18
4060
San Bernardino
Eastern Mojave Desert, north slope of Clark Mountain
1829
Comment
RSA155660
Chrysothamnus nauseosus subsp. hololeucus
J. C. Roos
1955-8-24
6543
Inyo
1mile NE of Willow Spring
1860
Comment
RSA89965
Chrysothamnus nauseosus subsp. hololeucus
J. C. Roos
1950-10-17
5010
San Bernardino
Little Pigeon Pass, Barton Road ca. 2 mi. W of Loma Linda.
320
Comment
UCR18684
Chrysothamnus nauseosus var. speciosus
John C. Roos
1950-9-3
4972
San Bernardino
Eastern Mojave Desert, Clark Mountain, south slope
1890
Comment
CLARK-A1528-5612
Chrysothamnus paniculatus
John C. Roos
1946-11-2
3152
San Bernardino
Burn's Canyon
1219
Comment
RSA155653
Chrysothamnus parryi subsp. asper
J. C. Roos
1955-8-26
6551
Inyo
Main ridge between Squaw Peak and Waucoba Mountain.
2957
Comment
RSA71770
Chrysothamnus parryi subsp. asper
J. C. Roos
1951-8-8
5114
Inyo
SE rim Reed flat, White Mts
3079
Comment
CLARK-A1528-1737
Chrysothamnus parryi subsp. imulus
John C. Roos
1951-7-28
5071
San Bernardino
San Bernardino Mountains
2072
Comment
CLARK-A1528-1741
Chrysothamnus teretifolius
John C. Roos
1938-4-18
Inyo
Death Valley National Park
Comment
CAS-BOT-BC100752
Chrysothamnus viscidiflorus subsp. puberulus
John Roos; Lucille Roos
1951-8-8
5090
Inyo
3 miles NW of Cedar Flat, White Mts.
2590
Comment
RSA48876
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos, R. Weatherby
1949-9-2
4643
San Bernardino
North slopes Kingston Mts
2072
Comment
RSA48885
Chrysothamnus viscidiflorus subsp. viscidiflorus
J. C. Roos
1949-9-2
4638
San Bernardino
N side of Kingston Mts
1707
Comment
SD52928
Chrysothamnus viscidiflorus var. viscidiflorus
A. R. Roos, J. C. Roos
1955-8-26
6553
Inyo
North shoulder Waucoba Mountain.
3200
Comment
UC1042996
Chylismia heterochroma
J. C. and A. R. Roos
1952-8-14
6213
Inyo
0.4 mi n The Narrows; Inyo Mts., Marble Canyon
2316
Comment
POM265632
Cicer arietinum
J. C. Roos
1937-7-1
2395
Santa Barbara
Solvang
Comment
UCSB37895
Cirsium andersonii
Roos, John
1948-9-7
Mono
Sierra Nevada Mtns. NE of Tuolumne Meadows
2743
Comment
CAS-BOT-BC105811
Cirsium arizonicum
J. C. Roos; A. R. Roos
1953-8-9
5973
Inyo
Tamarack Canyon
2743
Comment
RSA79712
Cirsium arizonicum
J. C. Roos
1953-8-9
5973
Inyo
Tamarack Canyon.
2988
Comment
UCR23833
Cirsium arizonicum var. arizonicum
John C. Roos
1937-8-8
1016
Inyo
Sierra Nevada Mtns., Lone Pine Canyon below Mt. Whitney
3506
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
UCR23830
Cirsium arizonicum var. tenuisectum
John C. Roos
1949-6-21
4436
San Bernardino
Eastern Mojave Desert, New York Mtns, Keystone Canyon
1829
Comment
UCR30572
Cirsium scariosum
John C. Roos
1937-7-23
348
San Bernardino
San Bernardino Mountains, Fish Creek, upper Santa Ana River
1982
Comment
SD53019
Cirsium vulgare
J. C. Roos
1955-8-8
6525
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-3337
Clarkia dudleyana
John C. Roos
1948-6-26
3892
San Bernardino
City Creek
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-A1528-3371
Clarkia rhomboidea
John C. Roos
1947-6-14
3680
San Bernardino
San Bernardino Mountains
1523
Comment
POM265643
Claytonia parviflora subsp. tenuifolia
J. C. Roos
1937-6-5
1474
San Bernardino
Crestline
Comment
UCR18909
Clematis lasiantha
John C. Roos
1947-4-12
3437
San Bernardino
San Bernardino Mtns., Mill Creek
915
Comment
POM302504
Clematis ligusticifolia
J. C. Roos
1943-8-8
2700
Riverside
Hall Canyon.
Comment
POM265657
Cleome sparsifolia
J. C. Roos
1937-8-4
1953
Inyo
east side of Owens Lake.
Comment
RSA104821
Cleome sparsifolia
J. C. Roos
1955-5-13
6358
Inyo
SE end of Eureka Valley.
945
Comment
RSA47568
Cleomella brevipes
J. C. Roos, Weatherby
1949-9-3
3565
Inyo
Tecopa Hot Springs
427
Comment
UCR18948
Cleomella brevipes
John C. Roos, R. Weatherby
1949-9-3
3565
Inyo
Northeastern Mojave Desert, Drying alkaline meadows below Tecopa Hot Spring
427
Comment
CLARK-A1528-2385
Cleomella plocasperma
John C. Roos
1937-8-6
1960
Inyo
Big Pine
Comment
CLARK-A1528-3966
Cneoridium dumosum
John C. Roos
1937-6-16
2387
San Diego
Torrey Pines Ridge
Comment
RSA92552
Cneoridium dumosum
J. C. Roos
1954-4-10
6061
San Diego
San Pasqual
152
Comment
CLARK-A1528-2204
Coldenia nuttallii
John C. Roos
1952-5-17
5679
San Bernardino
Mojave Desert
914
Comment
CLARK-A1528-2203
Coldenia nuttallii
John C. Roos
1937-8-6
1961
Inyo
Big Pine
Comment
CLARK-A1528-2208
Coldenia plicata
John C. Roos
1965-6-23
Riverside
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-A1528-1229
Collinsia childii
John C. Roos
1937-6-5
1514
San Bernardino
Crestline
1523
Comment
RSA450061
Collinsia childii
J. C. Roos, Lucille Roos
1953-6-18
5922
San Bernardino
Cedarpines Park.
1524
Comment
UCSB42127
Collinsia heterophylla
Roos, John
1965-6-12
San Bernardino
Igo's near Mountain Home Village; in Mill Creek Canyon; San Bernardino Mtns
Comment
UCR24481
Collinsia heterophylla var. austromontana
John C. Roos
1956-5-26
6579
San Bernardino
San Bernardino Mtns., Wildwood Cyn, near Yucaipa
Comment
UCR18912
Colubrina californica
John C. Roos
1960-4-8
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mts.; canyon 2.5 mi. SE of Desert Center
Comment
UCSB72193
Comastoma tenellum
Roos, John
1959-8-23
Mono
Cottonwood Creek
2895
Comment
RSA45520
Condalia globosa var. pubescens
J. C. Roos
1949-4-8
4184
Imperial
near Midway Well.
Comment
CLARK-A1528-1780
Conyza coulteri
John C. Roos
1965-10-10
San Diego
Otay Lake
Comment
POM261396
Cordylanthus eremicus subsp. eremicus
J. C. Roos
1941-8-17
76
Inyo
Panamint Mountains; Wildrose Canyon at Kilns
Comment
CLARK-A1528-1236
Cordylanthus filifolius
John C. Roos
1940-9-1
231
San Bernardino
Cajon Pass
761
Comment
CLARK-A1528-4198
Cordylanthus helleri
John C. Roos
1958-8-30
Inyo
Inyo Mountains
Comment
UC1010203
Cordylanthus kingii subsp. helleri
John and Lucille Roos
1952-7-25
5818
Inyo
between Westgaard Pass and Reed Flat; White Mountains
2438
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
RSA155752
Cordylanthus kingii subsp. helleri
J. C. Roos
1955-7-20
6475
Inyo
Last Chance Mountains 2 miles east of Willow Spring, at boundary marker # 80.
2134
Comment
CLARK-A1528-4199
Cordylanthus nevinii
John C. Roos
1942-8-22
1752
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4200
Cordylanthus nevinii
John C. Roos
1965-9-11
San Bernardino
San Bernardino Mountains
Comment
RSA450160
Cordylanthus nevinii
J. C. Roos
1965-9-11
s.n.
San Bernardino
Mill Creek.
Comment
CLARK-A1528-5735
Cordylanthus ramosus subsp. eremicus
John C. Roos
1941-8-17
76
Inyo
Panamint Mountains
Comment
UCSB46757
Cordylanthus rigidus subsp. setiger
Roos, John
1965-8-18
Riverside
Thomas Valley, San Jacinto Mtns.
Comment
RSA0030791
Cordylanthus rigidus subsp. setiger
J. C. Roos
1965-8-18
s.n.
Riverside
Thomas Valley, San Jacinto Mtns.
Comment
CAS-BOT-BC238206
Cordylanthus tecopensis
John C. Roos
1954-7-18
6203
San Bernardino
Saratoga Springs, Mohave [Mojave] Desert
60
Comment
CLARK-A1528-1232
Cordylanthus tecopensis
John C. Roos, Alfred R. Roos
1950-8-7
4929
Inyo
Tecopa Hot Springs
426
Comment
CLARK-A1528-5173
Cordylanthus tecopensis
John C. Roos, Lucille Roos
1954-9-15
6243
Inyo
426
Comment
CLARK-A1528-5174
Cordylanthus tecopensis
John C. Roos
1953-10-31
6033
Inyo
Amargosa River
441
Comment
GH365880
Cordylanthus tecopensis
J. C. Roos & L. Roos
1954-9-15
6243
Unknown
between Tecopa and Tecopa Hot Springs.
426
Comment
CLARK-A1528-5629
Coreopsis atkinsoniana
John C. Roos
1955-7-2
6473
San Diego
Escondido
182
Comment
CLARK-A1528-1785
Corethrogyne filaginifolia
John C. Roos
1942-9-12
1719
Los Angeles
Westwood
Comment
UCR27546
Cornus sericea subsp. sericea
John C. Roos
1963-1
s.n.
San Bernardino
San Bernardino Mtns., Green Canyon
2530
Comment
CLARK-A1528-1015
Coronopus didymus
John C. Roos
1947-6-9
3651
San Bernardino
San Bernardino
320
Comment
UCR23727
Cotula australis
John C. Roos
1942-2-28
1004
Los Angeles
San Gabriel Valley, Pomona, 737 East Phillips St.
250
Comment
CLARK-A1528-3988
Cowania mexicana
John C. Roos
1950-8-4
San Bernardino
Clark Mountain Range
Comment
CLARK-A1528-3989
Cowania mexicana var. stansburyana
John C. Roos
1941-8-17
71
Inyo
Panamint Mountains
Comment
SD52868
Cowania mexicana var. stansburyana
J. C. Roos
1955-7-21
6492
Inyo
1.0 mile south of Willlow Spring, Last Chance Mountains.
2073
Comment
CLARK-A1528-2618
Crassula erecta
John C. Roos
1952-2-29
5373
Riverside
Riverside
457
Comment
CLARK-A1528-2619
Crassula erecta
John C. Roos
1947-2-20
3275
San Bernardino
Loma Linda Hills
Comment
RSA47446
Crepis acuminata
J. C. Roos
1949-7-16
4551
San Bernardino
Moonridge Ski Area, Bear Valley.
2226
Comment
RSA71745
Crepis intermedia
J. C. Roos
1952-7-27
5832
Inyo
Southeast rim Reed Flat, White Mountains.
3140
Comment
UC1010205
Crepis intermedia
John and Lucille Roos
1952-7-27
5832
Inyo
Reed Flat White Mts. (se rim)
3139
Comment
CLARK-A1528-5222
Crepis nana
John C. Roos
1947-7-13
2895
Inyo
Panamint Mountains
3352
Comment
UCR20312
Crepis nana
John C. Roos
1947-7-13
2895
Inyo
Northern Mojave /Great Basin Desert, Panamint Mountains, Death Valley National Monument [Park], Telescope Peak
3354
Comment
RSA40586
Crepis nana subsp. ramosa
J. C. Roos
1947-7-13
2895
Inyo
Death Valley National Monument, Telescope Peak.
3354
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-A1528-2691
Croton californicus
John C. Roos
1965-6-27
San Bernardino
Loma Linda
1000+ ft
Comment
CLARK-A1528-432
Croton californicus
John C. Roos
1951-9-25
5297
Riverside
Santa Ana River
259
Comment
UCR23593
Croton setiger
John C. Roos
1938-8-19
2747
San Bernardino
San Bernardino Valley, Loma Linda
305
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
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
UCR18800
Cryptantha confertiflora
John C. Roos
1947-4-20
3576
Inyo
Northern Mojave Desert, Panamint Mountains near Telescope Peak, Wildrose Canyon
1585
Comment
UCR23590
Cryptantha confertiflora
John C. Roos
1955-5-15
6377
Inyo
Last Chance Mtns, 1 mi east of Willow Spring
1951
Comment
CLARK-A1528-2212
Cryptantha costata
John C. Roos
1949-4-7
4158
Imperial
Algodones Dunes
Comment
CLARK-A1528-4998
Cryptantha flavoculata
John C. Roos
1947-4-20
3577
Inyo
Wildrose Canyon
1584
Comment
UCR25964
Cryptantha gracilis
John C. Roos
1949-6-24
3559
San Bernardino
Eastern Mojave Desert, summit of Clark Mountain
2409
Comment
UCR31667
Cryptantha gracilis
John C. Roos
1949-6-19
4397
San Bernardino
Eastern Mojave Desert, SE base of Clark Mountain
1921
Comment
UCR25423
Cryptantha hoffmannii
John C. Roos, L. Roos
1954-6-29
6188
Inyo
Northern Mojave Desert, Inyo Mountains, The Narrows, Marble Canyon
2195
Comment
UCR30479
Cryptantha hoffmannii
John C. Roos, A. R. Roos
1953-8-11
6005
Inyo
Northern Mojave Desert, Canyon 3 mi east of Badger Flat, Inyo Mtns.
3110
Comment
RSA450444
Cryptantha intermedia
J. C. Roos
1950-4-22
4746
Riverside
Pigeon Pass
Comment
UCR23444
Cryptantha micrantha var. lepida
John C. Roos
1937-4-18
s.n.
San Bernardino
San Bernardino Valley, Santa Ana River near Redlands
427
Comment
CLARK-A1528-2228
Cryptantha muricata
John C. Roos
1948-6-13
3879
San Bernardino
San Gabriel Mountains
1219
Comment Read comments Mar 20 2014
UCR25967
Cryptantha muricata
John C. Roos
1948-6-13
3879
San Bernardino
San Gabriel Mtns., Lytle Creek, along roadside
1220
Comment
RSA0079568
Cryptantha muricata var. jonesii
J. C. Roos
1950-4-15
4732
Riverside
The summit of Reche Canyon.
793
Comment
CLARK-A1528-2229
Cryptantha nevadensis
John C. Roos
1966-3-20
Riverside
Comment
CLARK-A1528-7857
Cryptantha nevadensis
John C. Roos
1949-4-11
4246
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-2232
Cryptantha racemosa
John C. Roos
1948-5-1
3815
Riverside
Whitewater
609
Comment
CLARK-A1528-2236
Cryptantha utahensis
John C. Roos
1948-5-1
3816
Riverside
Whitewater
548
Comment
RSA71734
Cryptantha virginensis
J. C. Roos, L. Roos
1952-7-28
5849
Inyo
White Mountains:Wyman Canyon
2744
Comment
POM261394
Cryptogramma acrostichoides
J. C. Roos
1941-6-5
113
San Bernardino
San Bernardino Mountains: Above Dollar Lake.
2896
Comment Read comments Mar 4 2008
UCR24181
Cucurbita foetidissima
John C. Roos
1952-6-13
5764
San Bernardino
San Bernardino Valley, Reche Canyon
457
Comment
UC1010326
Cuniculotinus gramineus
J. C. and A. R. Roos
1953-8-9
5945
Inyo
Inyo Mts., Tamarack Canyon
2682
Comment
CLARK-A1528-2663
Cupressus macnabiana
John C. Roos
1938-11-19
323
Napa
Pope Valley
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
POM265706
Cycloloma atriplicifolium
J. C. Roos
1937-6-16
1230
San Diego
San Pasqual Valley.
Comment
UCR24273
Cycloloma atriplicifolium
John C. Roos
1937-9-29
s.n.
Los Angeles
San Gabriel Valley, near the San Gabriel River, in El Monte
91
Comment
SBBG54103
Cyclospermum leptophyllum
J. C. Roos, L. Roos
1953-5-9
5917
Riverside
Fairmount Park, Riverside
259
Comment
UCR26275
Cymopterus aboriginum
John C. Roos, A. R. Roos
1954-6-12
6131
Inyo
Northern Mojave Desert, Panamint Mountains, upper Wildrose Canyon, near Wildrose Peak
2439
Comment
RSA40575
Cymopterus aboriginum
J. C. Roos
1947-4-20
3522
Inyo
Wildrose Canyon, Panamint Mountains.
1585
Comment
UC1010175
Cymopterus aboriginum
J. C. and A. R. Roos
1953-8-11
5983
Inyo
1 mi e of Badger Flat and Blue Bell Mine (Inyo Mountains); Inyo Mountains
2834
Comment
CLARK-A1528-1434
Cymopterus cinerarius
John C. Roos
1953-8-11
5983
Inyo
Inyo Mountains
2834
Comment
RSA71746
Cymopterus cinerarius
J. C. Roos, Lucille Roos
1952-7-27
5831
Inyo
Ridge at S. E. rim Reed Flat, White Mountains.
3171
Comment
UC1236247
Cymopterus gilmanii
John C. Roos
1955-5-13
6343
Inyo
e and ne of Eureka Valley (w base of Last Chance Mountains); Last Chance Mountains
1219
Comment
UCR23394
Cymopterus gilmanii
John C. Roos, P. A. Munz
1955-4-8
6303
Inyo
Northern Mojave Desert, Last Chance Mtns, east of Eureka Valley sand dunes
1220
Comment
CLARK-A1528-51
Cynodon dactylon
John C. Roos
1951-10-2
5311
San Bernardino
Loma Linda
320
Comment
UCR30615
Cynodon dactylon
John C. Roos, A. R. Roos
1950-8-7
s.n.
San Bernardino
Northeastern Mojave Desert, Beck Spring, Kingston Mountains
1372
Comment
POM263117
Dactylis glomerata
J. C. Roos
1938-6-4
473
San Bernardino
Loma Linda, San Bernardino Valley.
Comment
UCR25610
Dactylis glomerata
John C. Roos
1947-5-27
3650
San Bernardino
San Bernardino Valley, Loma Linda, residential area
366
Comment
CLARK-A1528-4900
Dalea fremontii var. saundersii
John C. Roos
1937-5-30
486
San Bernardino
Kramer Hills
Comment
UCR24509
Dalea mollissima
John C. Roos
1949-3-19
4106
Riverside
Sonoran (Colorado) Desert, near Dos Palmas Spring on the E side of the Salton Sea in the vicinity of Salt Creek
-30
Comment
CLARK-A1528-2771
Dalea polyadenia
John C. Roos
1954-6-28
6178
Inyo
Eureka Valley
914
Comment
CLARK-A1528-1242
Danthonia californica
John C. Roos
1937-7-29
414
San Bernardino
San Bernardino Mountains
Comment
UCR18885
Datisca glomerata
John C. Roos
1967-9-23
s.n.
San Bernardino
San Bernardino Mtns, Holcomb Creek
1585
Comment
CLARK-A1528-5134
Datisca glomerata
John C. Roos
1967-9-23
San Bernardino
San Bernardino Mountains
1584
Comment
CLARK-A1528-1204
Datura stramonium
John C. Roos
1939-9-9
San Bernardino
Mentone
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-A1528-5721
Delphinium decorum
John C. Roos
1940-5-11
849
San Bernardino
San Bernardino Mountains
1219
Comment
CLARK-A1528-3857
Delphinium glaucum
John C. Roos, Lucille Roos
1952-7-30
5861
Mono
White Mountains
2743
Comment
UCR27419
Delphinium glaucum
John C. Roos
1965-8-9
s.n.
Inyo
Eastern Sierra Nevada Mtns, Onion Valley
2744
Comment
CAS-BOT-BC192561
Deschampsia cespitosa subsp. holciformis
J. C. Roos
1957-7-2
6638
Mendocino
Point Arena Lighthouse
Comment
CLARK-A1528-4581
Deschampsia danthonioides
John C. Roos
1937-7-27
451
San Bernardino
San Bernardino Mountains
Comment
RSA44906
Descurainia incana subsp. incisa
J. C. Roos
1947-8-9
3737
San Bernardino
Bluff Lake, San Bernardino Mts.
2287
Comment
RSA658696
Descurainia sophia
A. R. Roos
1954-4-12
6066
Los Angeles
5001 Gaviota Ave., Encino.
213
Comment
UC1494278
Dichanthelium acuminatum subsp. fasciculatum
John and Lucille Roos
1954-11-24
6262
Inyo
mouth Beveridge Canyon (e base Inyo Mts., Saline Valley); e base Inyo Mountains, Saline Valley, mouth Beveridge Canyon
609
Comment
RSA158108
Dichanthelium acuminatum var. fasciculatum
J. C. Roos
1955-7-23
6511
Inyo
Mouth of Beveridge Canyon, east base Inyo Mts., Saline Valley
610
Comment Read comments Mar 14 2008
CAS-BOT-BC292156
Dicoria canescens
John Roos; Lucille Roos
1954-6-28
6173
Inyo
At SE end Eureka Valley
929
Comment
UCR23772
Dicoria canescens subsp. clarkiae
John C. Roos, L. Roos
1954-11-24
6266
Inyo
Northern Mojave Desert, SE end of Eureka Valley
930
Comment
CLARK-A1528-1800
Dicoria canescens subsp. clarkiae
John C. Roos, Lucille Roos
1954-6-28
6173
Inyo
Eureka Valley
929
Comment
CLARK-A1528-5472
Dicoria canescens subsp. clarkiae
John C. Roos, Philip A. Munz
1954-9-18
20157
Inyo
Eureka Valley
929
Comment
RSA104839
Dicoria clarkiae
J. C. Roos
1955-5-13
6359
Inyo
SE end of Eureka Valley.
945
Comment
UCSB37827
Dieteria canescens
Roos, John
1966-8-13
San Bernardino
Fish Creek, San Bernardino Mtns.
2316
Comment
UCR19367
Digitaria ischaemum
John C. Roos
1965-9-28
s.n.
Riverside
San Jacinto Valley, San Jacinto
Comment
RSA69813
Digitaria ischaemum
J. C. Roos
1951-9-25
5276
Riverside
Fairmount Park
259
Comment
CLARK-A1528-4587
Digitaria sanguinalis
John C. Roos
1965-7-5
San Bernardino
Loma Linda
304
Comment
OBI30463
Diplacus bigelovii
J. C. Roos
1967-8-6
s.n.
Inyo
Mazourka Cyn, Inyo Mts
Comment
CAS-BOT-BC152926
Diplacus brevipes
J. C. Roos
1965-6-6
s.n.
San Bernardino
Mill Creek, near Fallsvale, San Bernardino Mtns.
Comment
POM302498
Diplotaxis muralis
J. C. Roos
1943-4-11
2603
San Bernardino
County Hospital.
Comment
LA102187
Distichlis spicata
John C. Roos;
1949-5-14
4309
San Bernardino
Lucerne Valley, Rabbit Springs
883
Comment
CLARK-A1528-4592
Distichlis stricta var. laxa
John C. Roos
1952-7-2
5804
Riverside
Riverside
259
Comment
RSA52806
Dodecahema leptoceras
J. C. Roos, L. Roos
1950-6-3
4822
San Bernardino
Cajon Canyon, 1 mile below 'Blue Cut'
762
Comment
CLARK-A1528-1317
Dodecatheon clevelandii
John C. Roos
1946-12-28
3195
Riverside
Reche Canyon
0
Comment
CLARK-A1528-2311
Draba corrugata
John C. Roos
1936-7-30
951
San Bernardino
San Bernardino Mountains
3322
Comment
UCR25945
Draba corrugata
John C. Roos
1946-9-4
2955
San Bernardino
San Bernardino Mtns., San Gorgonio Peak
3500
Comment
UCR19087
Draba cuneifolia var. integrifolia
John C. Roos
1952-3-19
5402
Riverside
Peninsular Range, Box Springs Mountains [east edge of Riverside]
457
Comment
POM265667
Draba lemmonii
J. C. Roos
1937-8-8
1020
Inyo
Steep E slope of Whitney Pass, Sierra Nevada.
3659
Comment
UCR23631
Draba verna var. aestivalis
John C. Roos
1939-2-21
299
Napa
North Coast Range, Pacific Union College, Angwin
549
Comment
CLARK-A1528-5133
Drosera rotundifolia
John C. Roos
1957-7-1
6624
Mendocino
Little River
Comment
CLARK-A1528-1491
Dryopteris arguta
John C. Roos
1937-3-27
1326
Santa Barbara
Los Olivos
Comment
POM265681
Dudleya abramsii
J. C. Roos
1937-6-14
1787
San Diego
near Descanso Junction
Comment
UCR25151
Dudleya cymosa
John C. Roos
1965-6-28
s.n.
San Bernardino
San Bernardino Mtns., Mill Creek Canyon at Igo's [a store at Mountain Home Village -S.D. White 2001]
1159
Comment
CLARK-A1528-2622
Dudleya lanceolata
John C. Roos
1937-5-21
2338
Orange
Santa Ana
Comment
CLARK-A1528-4866
Dudleya lanceolata
John C. Roos
1937-6-13
1789
San Diego
Imperial Beach
Comment
CLARK-A1528-4925
Dudleya saxosa
John C. Roos
1937-5-29
1790
San Bernardino
San Bernardino Mountains
Comment
UCD98830
Dysphania pumilio
A. R. Roos
1937-7-14
s.n.
San Bernardino
Santa Ana River, near Waterman Avenue.
Comment
CAS-BOT-BC291045
Dyssodia papposa
John Roos; Lucille Roos
1952-5-1
5056 a
San Bernardino
Corner of Central and Anderson, Loma Linda
335
Comment
RSA66169
Dyssodia papposa
J. C. Roos
1951-5-31
5056
San Bernardino
Loma Linda, corner of Central & Anderson.
335
Comment
RSA444678
Eclipta prostrata
J. C. Roos
1965-7-5
s.n.
Riverside
Thermal Airport.
Comment
POM265811
Elatine californica
J. C. Roos
1937-7-27
1673
San Bernardino
Boulder Bay, Bear Lake, San Bernardino Mts.
Comment
CLARK-A1528-4937
Elatine californica
John C. Roos
1937-7-27
1673
San Bernardino
San Bernardino Mountains
Comment
UCSB45522
Elatine chilensis
Roos, John
1965-7-17
San Bernardino
Dry Lake; San Bernardino Mtns.
2743
Comment
UCR24046
Eleusine indica
John C. Roos
1942-10-1
1735
Los Angeles
Los Angeles, North Boyle and Bridge Street
Comment
POM266271
Elymus X gouldii
J. C. Roos
1937-7-2
1926
Santa Barbara
Los Olivos.
Comment
RSA69833
Elymus X gouldii
J. C. Roos, L. Roos
1951-10-24
5344
Riverside
Fairmount Park.
259
Comment
CAS-BOT-BC203836
Elymus X hansenii
J. C. Roos
1952-6-13
5765
Riverside
Reche Canyon
457
Comment
RSA79478
Elymus X hansenii
J. C. Roos, A. R. Roos
1952-8-13
6016
Inyo
Along crest of Inyo Mountains, 3 miles east of Badger Flat. Alt. 10600 ft.
3232
Comment
RSA450648
Elymus elymoides
J. C. Roos
1965-6-16
s.n.
San Bernardino
North slope of Cajon Pass [San Gabriel Mountains].
Comment
POM265759
Elymus glaucus
J. C. Roos
1937-5-10
2076
Orange
San Juan Capistrano.
Comment
UCR24023
Elymus glaucus subsp. jepsonii
John C. Roos
1942-6-20
993
Riverside
Peninsular Range; San Jacinto Mtns, Dark Canyon Camp, North Fork San Jacinto River
1829
Comment
UCR24048
Elymus glaucus subsp. jepsonii
John C. Roos
1940-7-18
1871
San Bernardino
San Bernardino Mtns., Green Valley
Comment
UCR23882
Elymus stebbinsii
John C. Roos
1940-7-30
1573
San Bernardino
San Bernardino Mtns., Big Bear Valley, Pine Knot Camp [vicinity of Pine Knot Blvd., city of Big Bear Lake]
2073
Comment
UC1010200
Elymus trachycaulus
John and Lucille Roos
1951-8-12
5184
Inyo
Reed Flat White Mts.
3169
Comment
CLARK-A1528-4607
Elymus triticoides
John C. Roos
1951-10-24
5344
Riverside
Riverside
259
Comment
UCR24090
Endolepis covillei
John C. Roos
1940-6-8
1891
Kern
San Joaquin Valley, Bakersfield
Comment
RSA85161
Enneapogon desvauxii
J. C. Roos
1950-8-5
4899
San Bernardino
About 1 mile SW of Coliseum Mine, north side of Clark Mountains
1646
Comment
UC1023389
Enneapogon desvauxii
J. C. Roos
1950-9-3
4970
San Bernardino
s side Clark Mt.; Mojave Desert
1828
Comment
CLARK-A1528-2673
Ephedra viridis
John C. Roos
1949-4-10
4224
Riverside
Chuckwalla Mountains
Comment
CLARK-A1528-2674
Ephedra viridis
John C. Roos
1950-8-4
San Bernardino
Clark Mountain
Comment
CLARK-A1528-3295
Epilobium adenocaulon
John C. Roos
1937-7-31
966
San Bernardino
San Bernardino
304
Comment
CLARK-A1528-3341
Epilobium adenocaulon var. holosericeum
John C. Roos
1937-7-31
967
San Bernardino
San Bernardino
304
Comment
UCR23520
Epilobium campestre
John C. Roos
1952-6-18
5779
Riverside
Moreno Valley, Edgemont [now part of city of Moreno Valley]
457
Comment
RSA48879
Epilobium canum subsp. canum
J. C. Roos
1949-9-21
4663
Riverside
Reche Canyon, 2.7 miles south of Hollow Hill Dairy
457
Comment
UCR26278
Epilobium ciliatum
John C. Roos
1952-6-25
5795
Riverside
Thickets at W end of Fairmont Park, Riverside
260
Comment
UCR23468
Epilobium densiflorum
John C. Roos
1965-9-15
s.n.
San Bernardino
Mojave Desert, Victorville
Comment
UCR23534
Epilobium oregonense
John C. Roos
1937-8-18
2528
Riverside
San Jacinto Mtns, Round Valley
2744
Comment
UCSB42150
Epilobium torreyi
Roos, John
1965-9-15
San Bernardino
Victorville
Comment
CLARK-A1528-3377
Epipactis gigantea
John C. Roos
1941-8-2
87
Riverside
San Jacinto Mountains
2133
Comment
CLARK-A1528-3380
Epipactis gigantea
John C. Roos
1948-4-24
3793
Riverside
Whitewater
609
Comment
CLARK-A1528-7851
Epipactis gigantea
John C. Roos
1948-5-15
3838
Riverside
Eagle Mountains
Comment
POM266631
Epipactis gigantea
J. C. Roos
1942-5-2
1129
Riverside
Cottonwood Springs, northern Colorado Desert.
Comment Read comments Oct 9 2010
UCR19157
Epipactis gigantea
John C. Roos
1948-5-29
3870
Riverside
San Bernardino Mtns., Whitewater Canyon
856
Comment
CLARK-A1528-4627
Eragrostis barrelieri
John C. Roos
1965-9-22
San Bernardino
Barstow
Comment
CAS-BOT-BC204486
Eragrostis cilianensis
J. C. Roos
1965-7-7
s.n.
Riverside
San Jacinto
Comment
CLARK-A1528-4630
Eragrostis cilianensis
Alfred R. Roos
1937-8-4
10879
Inyo
Lone Pine
Comment
CAS-BOT-BC204534
Eragrostis curvula
J. C. Roos
1965-9-16
s.n.
San Bernardino
Lakeview
Comment Read comments Sep 19 2018
RSA450451
Eragrostis curvula
J. C. Roos
1965-10-10
s.n.
San Diego
On the dry roadside of hwy 395, 0.1 miles south of the San Diego/Riverside county line.
Comment
UCR23991
Eragrostis curvula var. curvula
John C. Roos
1965-9-16
s.n.
Riverside
Lakeview
Comment
CLARK-A1528-59
Eragrostis diffusa
John C. Roos
1951-9-18
5218
San Bernardino
Loma Linda
335
Comment
CLARK-A1528-7800
Eragrostis mexicana
John C. Roos
1950-5-16
4811
San Bernardino
Highland
457
Comment
UCSB51371
Eragrostis mexicana
Roos, John
1937-11-25
San Bernardino
Highland
Comment Read comments May 21 2011
UCD63881
Eragrostis mexicana subsp. virescens
John and Lucille Roos
1951-8-12
5194
Inyo
Big Pine, along Big Pine Creek.
1219
Comment
UCR25239
Eragrostis mexicana subsp. virescens
Alfred R. Roos
1947-12-2
s.n.
San Bernardino
San Bernardino Valley/San Bernardino Mtns. Foothills, Highland, east of San Bernardino
457
Comment
UCR32868
Eragrostis mexicana subsp. virescens
John C. Roos
1951-9-19
5220
San Bernardino
San Bernardino Valley, Irrigated orchard on West Barton Ave. in Loma Linda
335
Comment
UCR32866
Eragrostis minor
John C. Roos, A. R. Roos
1950-8-7
4921
San Bernardino
Northeastern Mojave Desert, Beck Spring, Kingston Mountains
1372
Comment
POM262906
Eragrostis pectinacea
J. C. Roos
1937-11-25
435
San Bernardino
Patton, in orchard.
Comment
RSA314966
Eragrostis pectinacea
J. C. Roos
1939-9-16
s.n.
San Bernardino
Mentone
Comment Read comments Aug 10 2007
CAS-BOT-BC284148
Eragrostis pectinacea var. pectinacea
J. C. Roos
1965-7-5
s.n.
San Bernardino
Loma Linda
304
Comment
HSC84423
Eragrostis pectinacea var. pectinacea
J. C. Roos
1936-10-9
1526
San Bernardino
Victorville
823
Comment
UCR25242
Eragrostis pectinacea var. pectinacea
Alfred R. Roos
1936-9-2
10386
San Bernardino
San Bernardino Mtns., Seven Oaks
1707
Comment
CLARK-A1528-3224
Eremalche rotundifolia
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
SD52945
Eremothera boothii subsp. intermedia
J. C. Roos
1955-6-17
9396
Inyo
2.0 miles northeast of Willow Spring, Last Chance Mountains.
2012
Comment
UC1234852
Eremothera boothii subsp. intermedia
J. C. Roos
1955-6-17
6396
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment Read comments Nov 4 2011
CAS-BOT-BC514443
Eriastrum eremicum subsp. eremicum
John Roos; Lucille Roos
1947-7-15
2825
Inyo
Darwin Mesa
1524
Comment
RSA0121587
Eriastrum sapphirinum subsp. dasyanthum
J. C. Roos
1965-6-13
s.n.
Riverside
San Jacinto Valley, Valle Vista (east of Hemet).
Comment
RSA0123322
Eriastrum sapphirinum subsp. sapphirinum
J. C. Roos
1936-8-15
575
San Bernardino
Barton Flats.
Comment
CAS-BOT-BC515215
Eriastrum wilcoxii
J. C. Roos
1965-7-11
s.n.
Inyo
Wildrose Canyon at kilns, Panamint Mtns.
Comment
OBI30456
Eriastrum wilcoxii
J. C. Roos
1965-7-11
Inyo
Wild rose Canyon at kills, Panamint Mtns.
Comment
GH387225
Ericameria albida
J. C. Roos & L. Roos
1954-11-23
6260
Unknown
1.4 miles south of Lower Warm Spring, Saline Valley
381
Comment
GH387226
Ericameria albida
J. C. Roos & A. R. Roos
1954-8-15
6224
Unknown
Lower Warm Spring, Saline Valley
426
Comment
GH387228
Ericameria albida
J. C. Roos & L. Roos
1954-9-14
6232
Unknown
Amargosa River bottomland 3 miles south of Shoshone
432
Comment
OBI40198
Ericameria arborescens
John C. Roos
1948-8-27
3966
Santa Cruz
Santa Cruz Mtns.
Comment
UC1506370
Ericameria arborescens
J. C. Roos
1948-8-27
3966
Santa Cruz
on slope e Big Basin; Santa Cruz Mountains
Comment
UCR31646
Ericameria bloomeri
John C. Roos
1948-9-7
3990
Mono
Eastern Sierra Nevada Mtns., Crestview
2326
Comment
SEINET226224
Ericameria bloomeri
J. C. Roos
1948-9-7
4012
Tuolumne
Yosemite National Park ; Near Tuolumne Grove Big Trees
1219
Comment
UCR23944
Ericameria cooperi
John C. Roos
1949-5-14
4292
San Bernardino
Mojave Desert/San Bernardino Mtns, 4 mi. west of Hesperia
1052
Comment
UCR26141
Ericameria cooperi
John C. Roos
1949-5-29
4371
San Bernardino
Eastern Mojave Desert, Coloseum Mine, Clark Mountain
1707
Comment
RSA48684
Ericameria cuneata var. spathulata
J. C. Roos, L. Roos
1949-8-13
4609
San Bernardino
Copper Queen Mine, Keystone Canyon, New York Mtns.
1829
Comment
UCR23897
Ericameria ericoides
John C. Roos
1942-10-10
1723
Los Angeles
UCLA, Los Angeles
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
UC1494271
Ericameria gilmanii
J. C. Roos
1947-9-19
2798
Inyo
rocky ridge se Telescope Peak; Panamint Mtns.
3352
Comment
CAS-BOT-BC292385
Ericameria nana
J. C. Roos; A. R. Roos
1955-8-24
6538
Inyo
Summit ridge of Last Chance Mts, 3.5 miles S of Willow Spring
2438
Comment
POM266285
Ericameria palmeri var. pachylepis
J. C. Roos
1937-11-2
2447
Riverside
Hills N of Pigeon Pass, Northwestern Riverside County.
Comment
CAS-BOT-BC174359
Ericameria parishii var. parishii
J. C. Roos
1965-10-2
s.n.
San Bernardino
Camp Angelus, San Bernardino Mtns.
Comment
POM266283
Ericameria parishii var. parishii
J. C. Roos
1937-10-30
2261
Los Angeles
Lytle Creek, east end of San Gabriel Mts.
Comment
UC1234815
Ericameria parishii var. parishii
J. C. Roos
1955-9-3
6571
San Bernardino
2 mi w Loma Linda; Summit Little Pigeon Pass
335
Comment
UC1010181
Ericameria parryi var. aspera
John and Lucille Roos
1951-8-8
5114
Inyo
se rim Reed Flat; White Mts., Reed Flat
3078
Comment
UCR23782
Ericameria parryi var. aspera
John C. Roos, Alfred R. Roos
1955-8-26
6551
Inyo
Inyo Mountains, [Inyo National Forest], main ridge between Squaw Peak and Waucoba Mountain
2957
Comment
UCSB37812
Ericameria teretifolia
Roos, John
1965-9-18
Inyo
Wild Rose Canyon, Panamint Mtns.
Comment
UC1236227
Erigeron aphanactis var. aphanactis
John C. Roos
1955-5-15
6380
Inyo
Willow Creek Last Chance Mts., Willow Creek
1584
Comment
CLARK-A1528-2166
Erigeron aphanactis var. congestus
John C. Roos
1946-9-4
San Bernardino
San Bernardino Mountains
3489
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
UCSB42153
Erigeron breweri
Roos, John
1965-6-26
San Bernardino
Upper Santa Ana Basin near Fish Creek, San Bernardino Mtns.
Comment
RSA47464
Erigeron breweri var. bisanctus
J. C. Roos
1949-7-16
4560
San Bernardino
Moonridge, Bear Valley, San Bernardino Mts.
2256
Comment
RSA155686
Erigeron breweri var. porphyreticus
J. C. Roos
1955-6-20
6456
Inyo
2 miles NE of Willow Spring.
1982
Comment
RSA47565
Erigeron breweri var. porphyreticus
J. C. Roos
1949-6-27
4509
San Bernardino
Kingston Mtns, on high ridge.
2134
Comment
UC809658
Erigeron breweri var. porphyreticus
John and Lucille Roos
1949-6-27
4508
San Bernardino
N. side Kingston Mts.; ne San Bernardino Co.
1828
Comment
UCR30560
Erigeron breweri var. porphyreticus
John C. Roos
1947-6-21
3691
San Bernardino
San Bernardino Mtns, Fawnskin, Bear Valley
Comment
CAS-BOT-BC294931
Erigeron clokeyi
J. C. Roos; A. R. Roos
1953-8-9
5953
Inyo
Near head of Tamarack Canyon, Inyo Mts.
3048
Comment
UCR23763
Erigeron clokeyi
John C. Roos
1955-7-21
6482
Inyo
Northeastern Mojave Desert, North face of Whitetop [= Last Chance] Peak on the summit of Last Chance Mtns.
2500
Comment
UCR26158
Erigeron clokeyi
John C. Roos
1947-7-11
2905
Inyo
Northern Mojave Desert, Panamint Mtns, Mahogany Flats
2470
Comment
CLARK-A1528-4883
Erigeron divergens
John C. Roos
1937-7-20
1176
San Bernardino
San Bernardino Mountains
Comment
RSA450423
Erigeron divergens
J. C. Roos
1965-6-26
s.n.
San Bernardino
San Bernardino Mountains probably near Barton Flats.
Comment
RSA450425
Erigeron divergens
J. C. Roos
1965-7-18
s.n.
San Bernardino
Along Bear Valley, San Bernardino Mtns.
Comment
RSA44886
Erigeron foliosus var. hartwegii
J. C. Roos
1948-9-1
3950
Siskiyou
Summit of pass SW of Etna
Comment
CLARK-A1528-1825
Erigeron glaucus
John C. Roos, Lucille Roos
1957-7-1
6631
Mendocino
Albion
6
Comment
UCR30563
Erigeron parishii
John C. Roos
1947-6-21
3695
San Bernardino
San Bernardino Mtns, Bottom of the canyon above Cushenbury Springs
1372
Comment
CLARK-A1528-1831
Erigeron uncialis
John C. Roos
1949-5-28
4361
San Bernardino
Clark Mountain
1920
Comment
UCR19186
Erigeron uncialis
John C. Roos
1954-6-26
6160
Inyo
Inyo Mountains, Mazourka Canyon, near SE end of Badger Flats
2622
Comment
CLARK-A1528-4621
Eriochloa acuminata
John C. Roos
1950-9-9
4985
San Bernardino
San Bernardino Valley
365
Comment
CLARK-A1528-61
Eriochloa acuminata
John C. Roos
1951-9-25
5294
Riverside
Riverside
259
Comment
RSA444801
Eriochloa acuminata
J. C. Roos
1957-6-20
6614
San Bernardino
Loma Linda.
305
Comment
UCD65712
Eriochloa acuminata
A. R. Roos
1937-11-28
Riverside
East Washington St., Riverside.
Comment
LA206376
Eriochloa acuminata var. acuminata
John C. Roos;
1950-8-22
4945
San Bernardino
San Bernandino Valley, Highland
457
Comment
CLARK-A1528-4615
Eriochloa aristata
John C. Roos
1965-9-26
Riverside
Indio
Comment
LA105134
Eriochloa aristata var. aristata
John C. Roos;
1985-12-22
5962
Riverside
Deep Canyon, Coachella Valley, 0.25 NW of Valerie Jean, W of Hwy 86, SE 0.25
-30
Comment Read comments Mar 23 2014
UCSB45569
Eriochloa contracta
Roos, John
1963-8-10
Riverside
Blythe
Comment
RSA47437
Eriodictyon angustifolium
J. C. Roos
1949-6-20
4410
San Bernardino
New York Mountains: Mouth of Keystone Canyon.
1616
Comment
CLARK-A1528-3613
Eriogonum angulosum
John C. Roos
1937-4-25
2099
San Bernardino
Essex
Comment
CLARK-A1528-3614
Eriogonum angulosum
John C. Roos
1937-8-11
1816
Kern
Tehachapi Pass
Comment
CLARK-A1528-5715
Eriogonum apiculatum
John C. Roos
1947-9-6
3743
Riverside
San Jacinto Mountains
Comment
CLARK-A1528-3618
Eriogonum baileyi
John C. Roos, Edmund C. Jaeger
1955-7-21
6496
Inyo
Last Chance Mountains
1828
Comment
RSA155701
Eriogonum baileyi var. baileyi
J. C. Roos, E. C. Jaeger
1955-7-21
6496
Inyo
Willow Spring, Last Chance Mountains.
1829
Comment
RSA155713
Eriogonum baileyi var. baileyi
J. C. Roos, A. R. Roos
1955-8-24
6535
Inyo
2 miles NE of Willow Spring. Last Chance Mountains.
2012
Comment
SD52867
Eriogonum baileyi var. baileyi
John C. Roos, Alfred R. Roos
1955-7-21
6496
Inyo
Willow Spring, Last Chance Mountains
1829
Comment
UCR24290
Eriogonum brachyanthum
John C. Roos
1955-7-24
6523
Inyo
Northern Mojave Desert, Nelson Range near head of Grapevine Canyon
1890
Comment
CLARK-A1528-3643
Eriogonum brachypodum
John C. Roos
1955-7-23
6507
Inyo
Inyo Mountains
2194
Comment
POM274226
Eriogonum brachypodum
J. C. Roos
1947-7-15
2823
Inyo
Darwin Mesa.
Comment
HSC78595
Eriogonum brachypodum
J. C. Roos
1965-7-10
Inyo
S slope trail to Telescope Peak, Panamint Mountains
2744
Comment
UCR24267
Eriogonum cernuum
John C. Roos
1955-7-23
6507
Inyo
Northern Mojave Desert, Soldier Flat [apparently =Whippoorwill Flat] at east base of Waucoba Mtn., Inyo Mountains
2195
Comment
UC1234678
Eriogonum cernuum var. cernuum
J. C. Roos
1955-7-23
6507
Inyo
Soldier Flat at e base of Waucoba Mountain Inyo Mountains, Waucoba Mountain
2194
Comment
CLARK-A1528-3622
Eriogonum cinereum
John C. Roos
1942-9-26
1727
Los Angeles
Santa Monica
Comment
CAS-BOT-BC242573
Eriogonum crocatum
J. C. Roos
1958-5-22
s.n.
Ventura
Conejo Grade summit on N. base of Santa Monica Mtns.
Comment
CLARK-A1528-3644
Eriogonum davidsonii
John C. Roos
1937-5-31
1820
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3697
Eriogonum davidsonii
John C. Roos
1937-8-10
1815
Kern
Walker Pass
Comment
UCR25398
Eriogonum deflexum
John C. Roos
1937-4-27
774
San Bernardino
Eastern Mojave Desert, Goffs
Comment
CAS-BOT-BC256245
Eriogonum deflexum var. baratum
J. C. Roos
1955-7-21
6489
Inyo
2.5 miles south of Willow Spring, ridge at crest of Last Chance Mountains
2346
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
RSA155654
Eriogonum esmeraldense
J. C. Roos, A. R. Roos
1955-8-26
6549
Inyo
East side of saddle between Sqauw Peak and Waucoba Mt., Inyo Mountains.
Comment
CLARK-A1528-3639
Eriogonum fasciculatum subsp. polifolium
John C. Roos
1937-5-29
2050
San Bernardino
Deep Creek
Comment
UCR24264
Eriogonum fasciculatum subsp. polifolium
John C. Roos
1955-5-13
6347
Inyo
Northern Mojave Desert, west base of Last Chance Mountains, east of Eureka Valley sand dunes
1220
Comment
RSA664935
Eriogonum fasciculatum var. foliolosum
J. C. Roos
1965-6-6
s.n.
San Bernardino
Mill Creek. San Bernardino Mountains.
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
RSA393357
Eriogonum fasciculatum var. polifolium
A. R. Roos
1922-11-8
s.n.
San Bernardino
Near Loma Linda
915
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
CAS-BOT-BC252280
Eriogonum heermannii var. argense
J. C. Roos; A. R. Roos
1955-8-24
6537
Inyo
Ridge 2 miles south of Willow Spring, Last Chance Mts.
2286
Comment
CLARK-A1528-5164
Eriogonum heermannii var. argense
John C. Roos
1953-8-8
5937
Inyo
Inyo Mountains
2743
Comment
RSA155715
Eriogonum heermannii var. argense
J. C. Roos, A. R. Roos
1955-8-24
6537
Inyo
Ridge 2 miles south of Willow Spring, Last Chance Mts.
2287
Comment
CLARK-A1528-3658
Eriogonum incanum
John C. Roos
1937-8-5
1660
Mono
White Mountains
2743-3048
Comment
UCR25325
Eriogonum incanum
John C. Roos
1942-6-25
1264
Mariposa
Sierra Nevada Mtns., Yosemite National Park, top of Half Dome
2683
Comment
CLARK-A1528-3659
Eriogonum inflatum
John C. Roos
1946-9-21
3079
San Bernardino
San Bernardino Mountains
1231
Comment
RSA92342
Eriogonum insigne
J. C. Roos, Lucille Roos
1952-6-28
6172
Imperial
SE end Eureka Valley.
915
Comment Read comments Jun 4 2014
RSA158116
Eriogonum kearneyi subsp. monoense
J. C. Roos, E. C. Jaeger
1955-7-22
6503
Inyo
Solidier Flat, east base Waucoba Mountain, Inyo Mountains.
2195
Comment
CLARK-A1528-3668
Eriogonum microthecum var. corymbosoides
John C. Roos
1941-10-18
859
San Bernardino
Bear Valley
2651
Comment
UCR24262
Eriogonum microthecum var. corymbosoides
John C. Roos
1937-7-28
1948
San Bernardino
San Bernardino Mtns, Van Deusen Canyon [Caribou Creek], near Bear Valley
2195
Comment
NY282224
Eriogonum microthecum var. lapidicola
J. C. Roos
1953-8-7
5931
Inyo
Badger Flat near Blue Bell Mine, Inyo Mts.
2682.2
Comment
SD125900
Eriogonum microthecum var. lapidicola
J. C. Roos
1967-8-6
Inyo
Inyo Mountains, 1 mile north-east of Badger Flat. Rocky slopes
2804
Comment
CAS-BOT-BC268698
Eriogonum microthecum var. laxiflorum
J. C. Roos; A. R. Roos
1953-8-7
5931
Inyo
Badget Flat near Blue Bell Mine, Inyo Mts.
2682
Comment
CLARK-A1528-3669
Eriogonum microthecum var. panamintense
John C. Roos
1941-8-17
73
Inyo
Panamint Mountains
2682
Comment
CLARK-A1528-3679
Eriogonum nudum subsp. saxicola
John C. Roos
1937-8-10
1044
Kern
Bodfish
Comment
UCR24322
Eriogonum nudum var. indictum
Alfred R. Roos
1937-7-4
1918
Santa Barbara
Sierra Madre Mountains, Upper Cuyama Valley
427
Comment
RSA40543
Eriogonum nudum var. westonii
J. C. Roos
1947-7-15
2871
Inyo
Wildrose Canyon at Kilns, Panamint Mountains.
1433
Comment
CAS-BOT-BC258555
Eriogonum nummulare
J. C. Roos; A. R. Roos
1955-8-25
6545
Inyo
Last Chance Mts. 0.1 mile NW of boundary marker #80, east of Willow Spring
2072
Comment
RSA71706
Eriogonum ovalifolium
J. C. Roos, Lucille Roos
1952-7-31
5877
Inyo
1 mile south of Reed Flat, White Mountains.
2835
Comment
CAS-BOT-BC258640
Eriogonum ovalifolium var. nivale
John Roos; Lucille Roos
1954-6-26
6158
Inyo
Badget Flat, Inyo Mts.
2621
Comment
RSA155707
Eriogonum palmerianum
J. C. Roos
1955-7-21
6490
Inyo
Rides at crest of Last Chance Mountains 2.5 miles south of Willow Spring.
2348
Comment
RSA158995
Eriogonum panamintense var. mensicola
J. C. Roos
1955-7-24
6521
Inyo
Nelson Range near head of Grapevine Canyon
1890
Comment
CAS-BOT-BC265555
Eriogonum parishii
J. C. Roos
1965-10-2
s.n.
San Bernardino
Camp Angelus, San Bernardino Mtns.
Comment
CLARK-A1528-5206
Eriogonum parishii
John C. Roos
1936-8-15
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3691
Eriogonum plumatella
John C. Roos
1943-10-17
2743
Riverside
Morongo Valley
Comment
POM263052
Eriogonum pusillum
J. C. Roos
1941-4-5
197
San Bernardino
Dry Morongo Canyon, Colorado Desert.
Comment
RSA450150
Eriogonum rixfordii
J. C. Roos
1965-9-18
s.n.
Inyo
Panamint Mtns.Wild Rose Canyon.
Comment
UCR26229
Eriogonum rixfordii
John C. Roos
1947-1-26
3200
Inyo
Emigrant Canyon below Emigrant Spring, Death Valley
1150
Comment
POM265722
Eriogonum roseum
J. C. Roos
1937-8-10
1045
Kern
Hills north of Caliente.
Comment
UCR27654
Eriogonum thomasii
John C. Roos
1966-3-20
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 miles southeast of Desert Center
366
Comment
UC1010235
Eriogonum thurberi
John C. Roos
1951-6-16
5063
San Bernardino
Loma Linda San Bernardino Valley, Loma Linda
304
Comment
CLARK-A1528-3717
Eriogonum umbellatum
John C. Roos
1949-9-2
4645
Inyo
2133
Comment
RSA450091
Eriogonum umbellatum
J. C. Roos
1946-10-5
3117
San Bernardino
Pipes Creek.
2134
Comment
POM261426
Eriogonum umbellatum var. dichrocephalum
J. C. Roos
1941-08
74
Inyo
Mahogany Flats, Panamint Mountains.
2470
Comment
RSA48886
Eriogonum umbellatum var. juniporinum
J. C. Roos
1949-9-2
4637
San Bernardino
N slope of the Kingston Mtns.
2012
Comment
UCR20527
Eriogonum umbellatum var. juniporinum
John C. Roos, R. Weatherby
1949-9-2
4645
San Bernardino
Eastern Mojave Desert, NE side of Kingston Peak, Kingston Mountains
2134
Comment
POM261424
Eriogonum umbellatum var. subaridum
J. C. Roos
1941-8-15
69
Inyo
Wildrose Canyon by Kilns, Panamint Mountains.
Comment
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
RSA79619
Eriogonum umbellatum var. versicolor
J. C. Roos, A. R. Roos
1953-8-8
5932
Inyo
Blue Bell Mine, Badger Flat, Inyo Mtns.
2683
Comment
CLARK-A1528-3725
Eriogonum wrightii subsp. subscaposum
John C. Roos
1937-7-15
386
San Bernardino
San Gabriel Mountains
Comment
POM302506
Eriogonum wrightii var. nodosum
J. C. Roos
1943-10-16
2741
San Bernardino
Little San Bernardino Mountains.
1524
Comment
RSA71720
Eriogonum wrightii var. subscaposum
J. C. Roos, Lucille Roos
1952-7-27
5826
Inyo
West rim of Reed Flat, White Mtns.
3110
Comment
POM265769
Eriogonum wrightii var. wrightii
J. C. Roos
1937-8-25
2027
San Bernardino
Near Barnwell, New York Mountains
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
CLARK-A1528-1837
Eriophyllum confertiflorum
John C. Roos
1948-5-1
3811
Riverside
Whitewater
548
Comment
UCR26156
Eriophyllum confertiflorum
John C. Roos
1948-5-1
3811
Riverside
Western Colorado Desert/ San Bernardino Mtns., Whitewater, N slope on a mountainside
549
Comment
CLARK-A1528-5321
Eriophyllum multicaule
John C. Roos
1940-5-4
882
Riverside
Reche Canyon
Comment
RSA92742
Eriophyllum multicaule
J. C. Roos
1952-5-19
5690
Riverside
One year old burn on hills N of Moreno.
503
Comment
CLARK-A1528-1305
Erodium botrys
John C. Roos
1943-3-27
2622
Los Angeles
West Los Angeles
0
Comment
CLARK-A1528-5432
Erodium botrys
John C. Roos
1943-3-27
2622
Los Angeles
West Los Angeles
0
Comment
CLARK-A1528-4856
Erodium moschatum
John C. Roos
1937-5-2
1402
Riverside
Riverside
Comment
UCR26194
Eschscholzia glyptosperma
John C. Roos
1947-2-15
3261
Riverside
Sonoran (Colorado) Desert, Eagle Mtns
Comment
CAS-BOT-BC419632
Eschscholzia parishii
J. C. Roos
1966-3-26
s.n.
Riverside
2 miles S.E. of Desert Center
Comment
UC1506368
Eucephalus breweri
J. C. Roos
1947-9-6
4013
Tuolumne
forest slopes near Tuolumne Grove Big Trees; Yosemite National Park
1219
Comment Read comments 1
UCR31735
Eucephalus breweri
John C. Roos
1948-9-7
4013
Tuolumne
Sierra Nevada Mountains, Yosemite National Park, slopes near Tuolumne Grove Big Trees
1220
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
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
UCR18854
Euphorbia maculata
John C. Roos
1965-7-28
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
396
Comment
UCR25149
Euphorbia maculata
John C. Roos, L. Roos
1951-7-28
5066
San Bernardino
San Bernardino Valley, Hwy 99, near Alabama Street west of Redlands
366
Comment
UCR25148
Euphorbia nutans
John C. Roos, L. Roos
1951-7-28
5065
San Bernardino
San Bernardino Valley, Hwy 99, near Alabama Street west of Redlands
366
Comment
RSA444476
Euphorbia peplus
J. C. Roos
1965-6-20
s.n
San Bernardino
Lawn in Loma Linda.
Comment
CLARK-A1528-2705
Euphorbia polycarpa
John C. Roos
1965-6-23
Riverside
Cactus City
Comment
UCR22192
Euphorbia revoluta
John C. Roos, A. R. Roos
1950-8-4
4891
San Bernardino
Eastern Mojave Desert, north side of Clark Mountain
1220
Comment
CLARK-A1528-2634
Euphorbia serpyllifolia
John C. Roos
1946-9-3
2976
San Bernardino
Oak Glen
Comment
CLARK-A1528-2638
Euphorbia setiloba
John C. Roos
1950-9-1
4962
San Bernardino
Clark Mountain Range
1645
Comment
CLARK-A1528-4999
Eurotia lanata
John C. Roos
1937-5-30
2053
San Bernardino
Victorville
Comment
RSA444664
Fagonia laevis
J. C. Roos
1966-3-26
s.n.
Riverside
2 miles SE of Desert Center.
Comment
UCR23760
Fagonia laevis
John C. Roos
1966-3-26
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 mi SE of Desert Center
366
Comment
CLARK-A1528-3990
Fallugia paradoxa
John C. Roos
1937-4-26
2113
San Bernardino
Providence Mountains
Comment
RSA155731
Fendlerella utahensis
J. C. Roos
1955-6-19
6451
Inyo
Last Chance Mountains: Whitetop Peak, 2 miles west of Last Chance Spring.
2576
Comment
CLARK-A1528-7831
Festuca arundinacea
John C. Roos
1949-5-21
4317
Riverside
Temecula
304
Comment
CLARK-A1528-1007
Festuca brachyphylla
John C. Roos
1937-8-8
417
Inyo
Sierra Nevada Mountains
Comment
CLARK-A1528-4645
Festuca brachyphylla
John C. Roos
1941-8-27
30
San Bernardino
Mount San Gorgonio
3047
Comment
CLARK-A1528-4650
Festuca californica subsp. parishii
John C. Roos
1919-7-24
San Bernardino
San Bernardino Mountains
Comment
POM261420
Festuca californica subsp. parishii
J. C. Roos
1941-6-1
92
San Bernardino
Near Glen Martin. Near falls on road below.
Comment Read comments Feb 20 2015
RSA0047249
Festuca californica subsp. parishii
J. C. Roos, L. Roos
1951-6-9
5061
San Bernardino
Fredalba, San Bernardino Mts.
1767
Comment
UCR23936
Festuca californica var. parishii
John C. Roos
1943-4-21
2633
San Bernardino
San Bernardino Mtns, Waterman Canyon
854
Comment
UCR19345
Festuca kingii
John C. Roos
1965-6-26
s.n.
San Bernardino
San Bernardino Mtns, Upper Santa Ana River Canyon near Heart Bar Park
Comment
UCR23935
Festuca myuros
John C. Roos, L. Roos
1950-4-15
4741
Riverside
Peninsular Range, Box Springs Mtns., Pigeon Pass
457
Comment
CLARK-A1528-4660
Festuca octoflora
John C. Roos
1950-4-15
4737
San Bernardino
San Timoteo Canyon
Comment
CLARK-A1528-4670
Festuca reflexa
John C. Roos
1938-4-9
1641
Riverside
Riverside
Comment
RSA415964
Festuca rubra
J. C. Roos, Steve Boyd
1965-7-31
s.n.
San Bernardino
South Fork Meadows, San Bernardino Mountains.
2287
Comment
UCR24045
Festuca rubra
John C. Roos
1940-8-17
1594
San Bernardino
San Bernardino Mtns, South Fork, above Lutheran Camp. Along the creek
Comment
UCR27416
Festuca rubra
John C. Roos
1950-7-20
4864
San Francisco
San Francisco Bay Region, San Francisco City College
91
Comment
OBI30460
Festuca rubra
John C. Roos
1950-7-20
4864
San Francisco
Field at San Francisco City College
91
Comment
UCR25779
Filago californica
John C. Roos
1952-4-13
5528
Riverside
Peninsular Range, Box Springs Mountains
520
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
UCR23797
Filago gallica
Alfred R. Roos
1930-6-7
3438
San Francisco
Central Coast/ San Francisco Bay Region, Shore Line Road, south of San Francisco
Comment
CLARK-A1528-3288
Forestiera neomexicana
John C. Roos
1937-8-11
22
Los Angeles
Lancaster
Comment
UCR20383
Forestiera pubescens
John C. Roos
1947-6-21
3702
San Bernardino
Mojave Desert, Lucerne Valley, Rabbit Springs
884
Comment
RSA47536
Forsellesia nevadensis
J. C. Roos, L. Roos
1949-6-22
4451
San Bernardino
New York Mtns, Keystone Canyon.
1829
Comment
CLARK-A1528-2928
Frankenia grandifolia
John C. Roos
1937-9-16
2568
Riverside
Riverside
Comment
CLARK-A1528-2929
Frankenia grandifolia
John C. Roos
1941-6-16
San Diego
Pacific Beach
Comment
CLARK-A1528-5248
Frankenia grandifolia var. campestris
John C. Roos
1937-5-23
2342
Riverside
Riverside
Comment
RSA47202
Frasera albomarginata
J. C. Roos
1949-6-20
4419
San Bernardino
New York Mountains: Keystone Canyon
1677
Comment
UCR23695
Frasera albomarginata
John C. Roos
1949-6-20
4419
San Bernardino
Eastern Mojave Desert, New York Mountains, Keystone Canyon
1738
Comment
UCR23696
Frasera neglecta
John C. Roos
1937-7-28
1943
San Bernardino
San Bernardino Mtns, Holcomb Valley
2043
Comment
CLARK-A1528-5684
Frasera parryi
John C. Roos
1937-6-8
2386
San Diego
Warner Springs
Comment
GH384941
Frasera puberulenta
J. C. Roos & L. Roos
1952-7-26
5824
Unknown
east side Reed Flat at head of Birch Creek, White Mts.
3048
Comment
CLARK-A1528-2956
Frasera puberulenta
John C. Roos, Lucille Roos
1952-7-26
5824
Inyo
White Mountains
Comment
CLARK-A1528-3289
Fraxinus anomala
John C. Roos
1949-5-28
San Bernardino
Clark Mountain
Comment
CLARK-A1528-5365
Fraxinus anomala
John C. Roos
1948-9-18
San Bernardino
Clark Mountain
Comment
SD52933
Fraxinus anomala
J. C. Roos
1955-6-19
6441
Inyo
Last Chance Mountains, 3.0 miles south of Willow Spring.
2377
Comment
CLARK-A1528-3290
Fraxinus dipetala
John C. Roos
1947-4-12
3441
San Bernardino
San Bernardino Mountains
Comment
POM302491
Fremontodendron californicum
J. C. Roos
1943-7-4
2712
San Bernardino
Greenspot, north base of Sugarloaf Mountains
Comment
CAS-BOT-BC304319
Galinsoga parviflora
John C. Roos
1954-5-11
6116
San Bernardino
Corner of Central and Anderson, Loma Linda
320
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
POM263133
Galinsoga parviflora var. parviflora
J. C. Roos
1941-2-18
201
San Bernardino
Loma Linda, San Bernardino Valley.
Comment
CLARK-A1528-4048
Galium angustifolium
John C. Roos
1937-7-20
485
San Bernardino
San Bernardino Mountains
Comment
CHSC1616
Galium bolanderi
E. Roos
1930-4-28
Butte
Rifle Range, Bidwell Park.
91
Comment
CAS-BOT-BC223091
Galium hilendiae subsp. carneum
John Roos; Lucille Roos
1947-7-14
2855
Inyo
North slope Baldy Peak (3 mi n Telescope Peak, probably = Rogers Peak), Panamint Mts.
2560
Comment
UCR27938
Galium hypotrichium
John C. Roos
1965-7-10
s.n.
Inyo
Northern Mojave Desert, south slope trail to Telescope Peak, Panamint Mountains
2744
Comment
OBI33221
Galium hypotrichium subsp. tomentellum
J. C. Roos
1965-7-10
s.n.
Inyo
S slope of Telescope Peak, near peak, Panamint Mts
Comment
GH385952
Galium matthewsii
J. C. Roos
1955-5-16
6385
Unknown
along Loretto road 1.5 miles southwest of Loretto Mine, Inyo Mts.
1676
Comment
RSA155680
Galium multiflorum
J. C. Roos
1955-6-17
6419
Inyo
2 miles NE of Willow Springs, Last Chance Mountains.
2012
Comment
RSA105010
Galium multiflorum
J. C. Roos
1955-5-16
6385
Inyo
narrow canyon along Loretto road 1.5 miles southwest of Loretto Mine
1677
Comment
CLARK-A1528-3952
Galium munzii
John C. Roos
1949-6-21
4433
San Bernardino
New York Mountains
1828
Comment
CLARK-A1528-4049
Galium munzii
John C. Roos
1947-7-13
2876
Inyo
Panamint Mountains
3261
Comment
CLARK-A1528-5118
Galium nuttallii
John C. Roos
1937-6-13
1438
San Diego
East San Diego
Comment
RSA47420
Galium parishii
J. C. Roos, L. Roos
1949-6-27
4514
San Bernardino
North slope Kingston Mts.
1982
Comment
UCR23491
Galium parishii
John C. Roos
1936-9-15
2510
Riverside
San Jacinto Mtns., Above Idyllwild
Comment
POM263038
Galium stellatum
J. C. Roos
1937-4-24
483
San Bernardino
Sheep Hole Mts., East of 29 Palms.
Comment
UCSB45609
Galium stellatum
Roos, John
1949-4-6
Riverside
Canyon in the Orocopia Mtns. 2 1/2 miles N.E. of Dos Palmas Spring
182
Comment
UCR25406
Galium stellatum subsp. eremicum
John C. Roos, Lucille Roos
1949-4-6
4144
Riverside
Sonoran (Colorado) Desert, Canyon in the Orocopia Mountains, 2.5 mi. NE of Dos Palmas Spring
152
Comment
UCR23824
Gamochaeta pensylvanica
John C. Roos, L. Roos
1952-6-23
5785
San Bernardino
San Bernardino Valley, Loma Linda
320
Comment
CLARK-A1528-2936
Garrya flavescens
John C. Roos
1947-3-15
3336
Riverside
San Jacinto Mountains
1066
Comment
CLARK-A1528-4971
Garrya flavescens
John C. Roos
1949-6-19
4409
San Bernardino
Clark Mountain
1950
Comment
CLARK-A1528-5683
Garrya flavescens
John C. Roos
1950-2-17
San Bernardino
Yucaipa
Comment
CLARK-A1528-7747
Garrya flavescens
John C. Roos
1950-5-6
4788
Riverside
Santa Ana Mountains
1036
Comment
CLARK-A1528-3331
Gaura coccinea
John C. Roos
1949-5-28
4340
San Bernardino
Clark Mountain
Comment
UCR19033
Gaura sinuata
John C. Roos
1950-5-16
4810
San Bernardino
San Timoteo Canyon, canyon c. 1 mi. south of Redlands So. Pac. R.R. Station
457
Comment
POM263082
Gayophytum diffusum subsp. parviflorum
J. C. Roos
1937-7-26
353
San Bernardino
Bear Valley, San Bernardino Mountains.
Comment
UCR30510
Gayophytum diffusum subsp. parviflorum
John C. Roos, A. R. Roos
1953-8-11
5999
Inyo
Northern Mojave Desert, Inyo Mtns: 2.5 mi east of Blue Bell Mine
2988
Comment
UCR18852
Gentiana amarella
John C. Roos, L. Roos
1952-7-30
5864
Mono
White Mountains, along Crooked Creek
2835
Comment
CLARK-A1528-5710
Gentiana newberryi
John C. Roos
1948-9-7
4006
Mono
Comment
CLARK-A1528-2952
Gentiana simplex
John C. Roos
1966-8-6
San Bernardino
San Bernardino Mountains
Comment
UCR25798
Geranium carolinianum
John C. Roos
1952-5-7
5620
Riverside
Box Springs Mountains above Canyon Crest Heights
503
Comment
UCD103507
Geranium robertianum
A. R. Roos
1958-6-3
s.n.
Los Angeles
In the lathhouses and elsewhere on the grounds of Evans and Reeves Nursery. Brentwood West Los Angeles.
Comment
UCR19198
Gilia achilleifolia
John C. Roos
1937-4-17
s.n.
San Diego
Peninsular Range, Lake Henshaw
Comment
UCR25331
Gilia aliquanta
John C. Roos
1955-4-8
6305
Inyo
Northern Mojave Desert, Last Chance Mtns, east of the Eureka Valley sand dunes.
1280
Comment
UCR31664
Gilia aliquanta
John C. Roos
1949-6-23
4460
San Bernardino
Eastern Mojave Desert, Rock Spring, Mid Hills
1463
Comment
CLARK-A1528-3502
Gilia angelensis
John C. Roos
1952-4-2
5460
Riverside
Box Springs
487
Comment
UCR19161
Gilia angelensis
John C. Roos
1966-3-22
s.n.
Riverside
Moreno Valley, Edgemont.
Comment
RSA0017223
Gilia ochroleuca subsp. ochroleuca
J. C. Roos
1955-6-17
6411
Inyo
2 miles north of Willow Spring, Last Chance Mountains.
2011
Comment
CLARK-A1528-3513
Gilia scopulorum
John C. Roos
1955-4-6
6298
Inyo
Inyo Mountains
502
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
POM264091
Gilia tricolor subsp. diffusa
J. C. Roos
1937-3-25
652
Kern
plains below Grapevine.
Comment
CLARK-A1528-3096
Glechoma hederacea
John C. Roos
1954-4-7
6059
San Bernardino
Loma Linda Valley
350
Comment
CLARK-A1528-4675
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
UCR25613
Glyceria elata
John C. Roos
1937-7-21
419
San Bernardino
San Bernardino Mtns, South Fork [Santa Ana River, near USFS campground]
1829
Comment
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
CLARK-A1528-2183
Gnaphalium beneolens
John C. Roos
1947-8-23
3741
San Bernardino
Loma Linda
426
Comment
CLARK-A1528-1851
Gnaphalium californicum
John C. Roos
1952-6-8
5750
Riverside
Reche Canyon
548
Comment
CLARK-A1528-1793
Gnaphalium microcephalum
John C. Roos
1961-10-28
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1857
Gnaphalium microcephalum
John C. Roos
1937-7-1
2473
Santa Barbara
Santa Barbara
Comment
UCR25852
Grayia spinosa
John C. Roos
1949-4-2
4132
Riverside
San Bernardino Mtns., Side canyon off Whitewater Canyon
Comment
RSA0040194
Guizotia abyssinica
John C. Roos
1955-7-2
6473
San Diego
Escondido.
182
Comment
CLARK-A1528-1096
Gutierrezia bracteata
John C. Roos
1940-9-2
222
Riverside
Jackrabbit Trail
609
Comment
CLARK-A1528-1861
Gutierrezia bracteata
John C. Roos
1965-6-21
Riverside
Comment
RSA648085
Gutierrezia californica var. bracteata
J. C. Roos
1940-9-2
222
Riverside
New Jackrabbit trail. 3 or 4 mi. W of Beaumont.
Comment
SD52995
Gutierrezia microcephala
J. C. Roos, A. R. Roos
1955-8-24
6540
Inyo
Last Chance Mountains, 1.5 miles northeast of Willow Spring.
1890
Comment
UCR23827
Gutierrezia microcephala
John C. Roos
1946-9-21
3045
San Bernardino
Mojave Desert, Rabbit Springs, Lucerne Valley
887
Comment
RSA450481
Gutierrezia sarothrae
J. C. Roos
1966-8-6
s.n.
San Bernardino
Upper Fish Creek at Fish Creek Meadows.
2439
Comment
UC1234862
Gutierrezia sarothrae
J. C. and A. R. Roos
1955-8-23
6533
Inyo
w base Last Chance Mts. e of Eureka Valley sand dunes; Last Chance Mts.
1219
Comment
CLARK-A1528-1867
Gutierrezia sarothrae
John C. Roos
1947-7-11
2842
Inyo
Panamint Mountains
2499
Comment
CLARK-A1528-2317
Halimolobos diffusa var. jaegeri
John C. Roos
1948-9-18
San Bernardino
Clark Mountain Range
2133
Comment
RSA79501
Halimolobos jaegeri
J. C. Roos
1953-8-14
6024
Inyo
Al Rose Canyon, Inyo Mts.
2500
Comment
CLARK-A1528-1871
Haplopappus acradenius
John C. Roos
1946-9-2
2986
San Bernardino
San Timoteo Canyon
Comment
CLARK-A1528-1877
Haplopappus brickellioides
John C. Roos, Lucille Roos
1955-4-6
6292
Inyo
Inyo Mountains
518
Comment
CLARK-A1528-1880
Haplopappus cuneatus
John C. Roos
1948-9-25
4076
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2156
Haplopappus cuneatus
John C. Roos
1941-11-15
870
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-7673
Haplopappus gilmanii
John C. Roos, Alfred R. Roos
1954-8-14
6216
Inyo
Inyo Mountains
0
Comment
CLARK-A1528-5603
Haplopappus macronema
John C. Roos
1959-8-20
Inyo
White Mountains
3047
Comment
CLARK-A1528-5604
Haplopappus macronema
John C. Roos
1959-8-20
Inyo
White Mountains
3047
Comment
CLARK-A1528-1898
Haplopappus palmeri
John C. Roos
1965-10-9
San Diego
La Mesa
Comment
CLARK-A1528-1899
Haplopappus palmeri
John C. Roos
1946-10-23
3133
San Bernardino
Loma Linda
Comment
CLARK-A1528-1903
Haplopappus pinifolius
John C. Roos
1952-8-27
5894
Riverside
Pigeon Pass
487
Comment
CLARK-A1528-1904
Haplopappus squarrosus
John C. Roos
1965-10-7
Riverside
Comment
SBBG16843
Hazardia brickellioides
J. C. Roos, A. R. Roos
1955-8-23
6530
Inyo
W base of Last Chance Mtns, E of Eureka Valley sand dunes
1219
Comment
POM263008
Hazardia squarrosa var. grindelioides
J. C. Roos
1940-9-1
233
San Bernardino
Cajon Pass, San Bernardino Mts.
701
Comment Read comments Jul 17 2014
CAS-BOT-BC314406
Hecastocleis
J. C. Roos; P. A. Munz
1955-4-8
6308
Inyo
Last Chance Mtns. east of the Eureka Valley sand dunes
1310
Comment
RSA85143
Hecastocleis shockleyi
J. C. Roos, L. Roos
1954-3-27
6055
Inyo
Summit of Grapevine Mts. above Leadfield
1646
Comment
RSA47423
Hedeoma nana subsp. californica
J. C. Roos, L. Roos
1949-6-22
4447
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
RSA431194
Hedypnois cretica
J. C. Roos
1956-5-5
6577
San Diego
Marlborough and Adams, San Diego.
Comment
UCD132674
Hedypnois cretica
J. C. Roos
1956-5-5
s.n.
San Diego
Marlborough and Adams.
Comment Read comments Apr 23 2019
CLARK-A1528-1936
Helenium bigelovii
John C. Roos
1965-9-11
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-2606
Helianthemum scoparium
John C. Roos
1965-6-30
Riverside
Santa Ana Mountains
Comment
UCR26095
Helianthus annuus subsp. jaegeri
John C. Roos
1948-9-19
4039
San Bernardino
Eastern Mojave Desert, Soda Springs, near Baker
284
Comment
CLARK-A1528-7877
Helianthus bolanderi
John C. Roos
1948-9-1
3981
Siskiyou
Fort Jones
853
Comment
RSA44878
Helianthus bolanderi
J. C. Roos
1948-8-31
3931
Lake
Lakeport.
Comment
UCSB37796
Helianthus bolanderi
Roos, John
1956-8-4
Santa Barbara
2 miles S.E. of Figueroa Mtn., along Mission Pine Road
1219
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
CLARK-A1528-1912
Helianthus niveus subsp. canescens
John C. Roos
1962-4-3
Riverside
Palm Springs Municipal Airport
121
Comment
RSA0016433
Helianthus nuttallii subsp. nuttallii
J. C. Roos
1965-9-22
s.n.
San Bernardino
Near the cement plant, Victorville
Comment
CAS-BOT-BC305800
Helianthus petiolaris
John Roos; Lucille Roos
1951-9-9
5199
San Bernardino
Highway 99 at Etiwanda Ave. between Ontario and Fontana
304
Comment
POM444679
Helianthus petiolaris
J. C. Roos
1965-6-20
s.n.
San Bernardino
Ontario: Vineyard
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
UCR23813
Hemizonia floribunda
John C. Roos
1965-10-10
s.n.
San Diego
Peninsular Range, 8 miles southeast of Dulzura [along Hwy 94, near Tecate Peak]
Comment
RSA450491
Hemizonia kelloggii
J. C. Roos
1965-6-27
s.n.
Riverside
Reche Canyon
Comment
CLARK-A1528-2176
Hemizonia tenella
John C. Roos
1952-7-19
5816
Riverside
Santa Ana Mountains
761
Comment
RSA92459
Herniaria hirsuta subsp. cinerea
J. C. Roos
1954-6-5
6123
San Bernardino
Loma Linda.
320
Comment
CLARK-A1528-2976
Hesperochiron californicus
John C. Roos
1951-6-11
4269
San Bernardino
Lucerne Valley
883
Comment
CLARK-A1528-4388
Hesperocnide tenella
John C. Roos
1937-2-21
1296
Riverside
La Sierra
Comment
UC1042983
Hesperostipa comata
John and Lucille Roos
1954-6-26
6162
Inyo
canyon at se end Badger Flat; Inyo Mts., Mazourka Canyon
2621
Comment
RSA92172
Hesperostipa comata subsp. comata
J. C. Roos, L. Roos
1955-6-26
6162
Inyo
Mazourka Canyon at SE end of Badger Flat, Inyo Mountains
2622
Comment
CLARK-A1528-1928
Heterotheca grandiflora
John C. Roos
1951-9-19
5224
San Bernardino
Loma Linda
335
Comment
CLARK-A1528-1929
Heterotheca grandiflora
John C. Roos
1942-9-26
1715
Los Angeles
Los Angeles
Comment
UCR23733
Heterotheca sessiliflora subsp. echioides
John C. Roos
1965-9-16
s.n.
Riverside
On State Street, near Florida St., in Hemet
486
Comment
CAS-BOT-BC312304
Heterotheca villosa var. nana
John Roos; Lucille Roos
1950-10-21
5011
Riverside
Wonderland of Rocks, Little San Bernardinno Mts.
1219
Comment
UCR24439
Heuchera hirsutissima
John C. Roos
1946-8-27
2784
Riverside
Peninsular Range, Santa Rosa Mtns
2287
Comment
CAS-BOT-BC424468
Heuchera rubescens
John Roos; Lucille Roos
1947-7-14
2850
Inyo
Baldy Peak, Panamint Mts.
2651
Comment
CLARK-A1528-4681
Hilaria rigida
John C. Roos
1965-9-5
Riverside
Chuckwalla Valley
Comment
UCSB51279
Hilaria rigida
Roos, John
1965-9-5
Riverside
18 miles W. of Blythe
Comment
SEINET953583
Hoffmannseggia glauca
J. C. Roos
1965-1
Riverside
17 miles West of Blythe, Colorado Desert.
Comment
CLARK-A1528-2785
Hoffmannseggia microphylla
John C. Roos
1949-3-19
4108
Riverside
Mecca
Comment
UCR24049
Holcus lanatus
John C. Roos
1950-6-28
847
San Bernardino
San Bernardino Valley, College of Medical Evangelists, Loma Linda
323
Comment
UCR23810
Holocarpha heermannii
John C. Roos
1965-8-21
s.n.
Tulare
Sierra Nevada Mtns., Middle Fork of Kaweah River Canyon, west of Sequoia National Forest
Comment
CLARK-A1528-1946
Holocarpha heermannii
John C. Roos
1965-8-21
Tulare
Oakwoodland
Comment
UCSB42207
Holocarpha heermannii
Roos, John
1965-8-21
Tulare
Middle fork of the Kaweah River Canyon, west of Sequoia Natl. Park
Comment
UCR30558
Holodiscus discolor
John C. Roos
1937-7-1
2254
Santa Barbara
Nojoqui Falls near Solvang
Comment
RSA47535
Holodiscus microphyllus
J. C. Roos, L. Roos
1949-6-27
4518
San Bernardino
North side of Kingston Mountains
1829
Comment
UCSB45952
Hordeum brachyantherum subsp. brachyantherum
Roos, John
1965-7-18
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
UCR26285
Hordeum depressum
John C. Roos
1952-4-22
5566
San Bernardino
San Bernardino Valley, Waterman Ave. west of Loma Linda
305
Comment
RSA45206
Hordeum jubatum
J. C. Roos, L. Roos
1949-5-14
4306
San Bernardino
Lucerne Valley
884
Comment
UCSB51365
Hordeum jubatum
Roos, John
1965-7-18
San Bernardino
Big Bear Lake, San Bernardino Mtns.
Comment
RSA45205
Hordeum marinum subsp. gussoneanum
J. C. Roos, Lucille Roos
1949-5-21
4318
Riverside
Temecula.
304
Comment
UCR30530
Hordeum marinum subsp. gussoneanum
John C. Roos
1949-5-21
4318
Riverside
Peninsular Range, At Temecula
305
Comment
UCR23465
Horkelia rydbergii
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Snow Valley
Comment
UC1234680
Horkelia wilderae
J. C. Roos
1955-8-20
6505
San Bernardino
Barton Flats near Barton Creek; San Bernardino Mountains, Barton Flats near Barton Creek
1889
Comment
POM266315
Hulsea algida
J. C. Roos
1937-8-8
1019
Inyo
Slope of Mt. Whitney.
Comment
CLARK-A1528-1956
Hulsea vestita
John C. Roos
1965-6-26
San Bernardino
San Bernardino Mountains
Comment
UCD133287
Hulsea vestita
J. C. Roos
1943-7-4
2718
San Bernardino
Sugarloaf Mountain, San Bernardino Mountains.
2987
Comment
CLARK-A1528-1952
Hulsea vestita subsp. callicarpha
John C. Roos
1946-8-27
2783
Riverside
Santa Rosa Mountains
2407
Comment
UCSB42190
Hulsea vestita subsp. callicarpha
Roos, John
1965-6-13
Riverside
West of Mountain Center, San Jacinto Mtns.
Comment
POM266313
Hulsea vestita subsp. parryi
J. C. Roos
2469
Los Angeles
north slope of Mt. San Antonio
2895
Comment
RSA450497
Hulsea vestita subsp. parryi
J. C. Roos
1965-6-26
s.n.
San Bernardino
San Bernardino Mountains probably near Barton Flats.
Comment
UC1023416
Hydrocotyle verticillata
J. C. and A. R. Roos
1950-8-7
4917
San Bernardino
e. Mohave Desert, China Ranch
396
Comment
RSA450488
Hymenoclea monogyra
J. C. Roos
1965-10-9
s.n
San Diego
Murphy Canyon
Comment
CLARK-A1528-1966
Hymenopappus filifolius var. lugens
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR19533
Hymenoxys cooperi
John C. Roos
1948-9-18
4063
San Bernardino
Eastern Mojave Desert, north slope of Clark Mountain
1829
Comment
CLARK-A1528-5163
Hymenoxys odorata
John C. Roos
1949-4-8
4199
Imperial
60
Comment
CLARK-A1528-5169
Hymenoxys odorata
John C. Roos
1949-4-8
4199
Imperial
60
Comment
UCD133369
Hypochaeris glabra
J. C. Roos
1948-4-29
2901
San Bernardino
carpenters tract in Loma Linda.
335
Comment
UCR25757
Hyptis emoryi
John C. Roos
1937-4-28
776
San Bernardino
Sonoran Desert, Rose [Earp], near Parker, Arizona; junction of Parker Road with that going north
118
Comment
UCSB46875
Impatiens balfourii
Roos, John
1957-7-13
San Bernardino
Mentone; along the Zanja Creek
Comment
CLARK-A1528-2266
Impatiens balfourii
John C. Roos
1957-6-22
6615
San Bernardino
Zanja Creek
548
Comment
RSA0010545
Impatiens balfourii
J. C. Roos
1957-7-13
6655
San Bernardino
Mentone.
Comment
RSA113419
Impatiens balfourii
J. C. Roos, L. Roos
1957-6-22
6615
San Bernardino
Zanja at Mentone Health Haven wast of Mentone
549
Comment
CLARK-A1528-4692
Imperata brevifolia
John C. Roos
1938-4-17
1619
Inyo
Death Valley
Comment
POM431209
Imperata brevifolia
J. C. Roos
1938-11-5
s.n.
San Bernardino
Arrowhead Hot Springs, south side of San Bernardino Mountains.
Comment
RSA47414
Ipomopsis polycladon
J. C. Roos, L. Roos
1949-6-18
4394
San Bernardino
Mountain Pass, Clark Mountains
1524
Comment
POM274199
Isocoma acradenia
J. C. Roos
1947-9-18
2791
Los Angeles
Lancaster
Comment
UCR24436
Isocoma acradenia subsp. acradenia
John C. Roos
1946-9-21
3070
San Bernardino
Mojave Desert, Rabbit Springs, Lucerne Valley
887
Comment
CLARK-A1528-2393
Isomeris arborea
John C. Roos
1942-1-1
873
San Bernardino
Crystal Mine
Comment
CLARK-A1528-2394
Isomeris arborea var. angustata
John C. Roos
1967-3-25
Riverside
Whitewater Canyon
457
Comment
RSA444488
Iva acerosa
J. C. Roos
1950-8-7
s.n.
Inyo
Tecopa.
Comment
CLARK-A1528-5628
Iva axillaris
John C. Roos
1937-6-10
1497
San Diego
Comment
POM266296
Iva hayesiana
J. C. Roos
1937-8-30
2551
San Diego
South of Otay.
Comment
CLARK-A1528-4006
Ivesia pygmaea
John C. Roos
1965-8-8
Fresno
Kearsage Lakes
Comment
UCR23466
Ivesia pygmaea
John C. Roos
1965-8-8
s.n.
Fresno
Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park
3354
Comment
UCR26127
Ivesia pygmaea
John C. Roos
1937-8-8
538
Inyo
Sierra Nevada Mtns., Lone Pine Canyon
Comment
CLARK-A1528-4100
Jamesia americana subsp. californica
John C. Roos, Lucille Roos
1954-6-29
6186
Inyo
Inyo Mountains
2194
Comment
UCR24416
Jepsonia parryi
John C. Roos
1955-3-26
6280
San Diego
Peninsular Range, Moosa Canyon near dam, along Hwy 395, 10 miles north of Escondido
152
Comment
SEINET13942195
Juglans californica
John C. Roos
1966-1
San Bernardino
Flats at Palm Ave. and Kendall Dr., north-west of San Bernardino
Comment
RSA450180
Juniperus californica
A. R. Roos
1934-1-22
s.n.
Riverside
Morongo Canyon.
Comment
RSA48888
Juniperus osteosperma
J. C. Roos
1949-9-2
4634
San Bernardino
North slopes Kingston Mts
2072
Comment
CLARK-A1528-4430
Kallstroemia californica
John C. Roos
1963-10-24
Riverside
Hayfield
Comment
SEINET13945561
Kallstroemia californica
J. C. Roos
1937-1
357
Riverside
Blythe
Comment
SEINET226238
Kallstroemia parviflora
A. R. Roos
1950-8-4
San Bernardino
North side of Clark Mountain, eastern Mojave Desert.
Comment
UCR23628
Kalmia polifolia subsp. microphylla
John C. Roos
1942-7-1
1252
Mariposa
Sierra Nevada Mtns, Yosemite National Park, on the Forsythe Pass Trail
2591
Comment
UCR24469
Keckiella rothrockii subsp. jacintensis
John C. Roos
1937-8-18
2534
Riverside
San Jacinto Mtns, Hidden Lake
Comment
CLARK-A1528-3962
Kelloggia galioides
John C. Roos
1937-7-22
1172
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1184
Kochia americana
John C. Roos
1965-9-18
Inyo
Inyo Mountains
Comment
UCR24209
Kochia californica
John C. Roos
1947-9-18
2790
Los Angeles
Western Mojave Desert, 2 mi north of Lancaster
710
Comment
UCR19013
Koeleria macrantha
John C. Roos
1952-4-29
5598
Riverside
Reche Canyon
457
Comment
UCR25357
Koeleria macrantha
John C. Roos, L. Roos
1952-5-11
5657
San Bernardino
San Bernardino Valley, Scott's Canyon, 2.5 mi. SE of Loma Linda
427
Comment
CAS-BOT-BC271308
Koeleria pyramidata
John Roos; Lucille Roos
1951-8-10
5157
Mono
Slopes 1 mile SE of White Mtn. Peak, White Mountains
3962
Comment
CAS-BOT-BC271309
Koeleria pyramidata
John Roos; Lucille Roos
1952-7-30
5869
Mono
Crooked Creek, White Mountains
3048
Comment
RSA0104244
Kopsiopsis strobilacea
John C. Roos
1937-7-17
375
Los Angeles
Near Telegraph Peak, San Gabriel Mts.
Comment
CLARK-A1528-5489
Krameria grayi
John C. Roos
1948-4-24
3804
Riverside
Whitewater
Comment
RSA155656
Krascheninnikovia lanata
J. C. Roos, A. Roos
1955-8-25
6547
Inyo
Little Cowhorn Valley, Inyo Mts.
2188
Comment
UC1234838
Krascheninnikovia lanata
J. C. and A. R. Roos
1955-8-25
6547
Inyo
Little Cowhorn Valley Inyo Mts., Little Cowhorn Valley
2186
Comment
CLARK-A1528-1976
Lactuca serriola
John C. Roos
1965-10-7
Riverside
Beaumont
Comment
CLARK-A1528-253
Lactuca serriola f. integrifolia
John C. Roos
1951-9-15
5203
San Bernardino
Loma Linda
304
Comment
UCR26288
Lamium amplexicaule
John C. Roos
1952-2-25
5355
San Bernardino
San Bernardino Valley, Bryn Mawr
366
Comment
UCR24237
Langloisia matthewsii
John C. Roos
1949-5-14
4297
San Bernardino
Southern Mojave Desert, Pickaninny Buttes
915
Comment
RSA47445
Langloisia setosissima subsp. punctata
J. C. Roos, L. Roos
1949-5-28
4355
San Bernardino
North slope of Clark Mt.
1646
Comment
CLARK-A1528-5636
Lappula floribunda
John C. Roos
1937-8-5
1841
Mono
White Mountains
Comment
UCR19092
Lappula occidentalis
John C. Roos
1948-7-4
3896
Inyo
Northern Mojave Desert, Panamint Mountains, Mahogany Flats
2470
Comment
CLARK-A1528-2242
Lappula redowskii
John C. Roos, Lucille Roos
1954-6-26
6155
Inyo
Inyo Mountains
2682
Comment
UCSB46751
Lappula redowskii
Roos, John
1967-5-30
San Bernardino
Near Arrastre Creek; San Bernardino Mtns.
2286
Comment
CLARK-A1528-4435
Larrea tridentata
John C. Roos
1947-1-26
3213
Inyo
Furnace Creek
Comment
RSA390015
Larrea tridentata
J. C. Roos
1948-5-8
3817
Riverside
Whitewater.
549
Comment
UCR25417
Lasthenia gracilis
John C. Roos, L. Roos
1952-5-10
5643
San Bernardino
Mojave Desert, Adelanto
915
Comment
CLARK-A1528-3228
Lavatera assurgentiflora
John C. Roos
1937-6-13
1431
San Diego
Imperial Beach
Comment
CLARK-A1528-2184
Layia glandulosa
John C. Roos
1941-4-5
190
San Bernardino
Little San Bernardino Mountains
Comment
CLARK-A1528-1984
Layia platyglossa
John C. Roos
1952-4-13
5525
Riverside
Box Springs Mountains
487
Comment
UCR25544
Layia platyglossa
John C. Roos
1941-4-19
170
Riverside
Peninsular Range, Loma Linda Hills/Box Springs Mtns.; plateau in Reche Canyon
671
Comment
CLARK-A1528-1983
Layia ziegleri
John C. Roos
1965-6-13
Riverside
San Jacinto Mountains
Comment
UCR23629
Ledum glandulosum
John C. Roos
1957-7-1
6635
Mendocino
Albion Ridge
6
Comment
CLARK-A1528-4708
Leersia oryzoides
John C. Roos
1951-10-14
5322
San Bernardino
San Bernardino
304
Comment
CLARK-A1528-4709
Leersia oryzoides
John C. Roos
1965-11-4
Riverside
Riverside
Comment
CLARK-A1528-1050
Lemmonia californica
John C. Roos
1951-8-8
5106
Mono
White Mountains
3200
Comment
POM264171
Lemna minuta
J. C. Roos
1937-7-25
656
San Bernardino
Seven Oaks, San Bernardino Mountains.
Comment
CLARK-A1528-2320
Lepidium dictyotum
John C. Roos
1950-4-7
4725
San Bernardino
Rabbit Springs
Comment
UCR23442
Lepidium lasiocarpum var. georginum
John C. Roos
1955-5-13
6333
Inyo
Northern Mojave Desert, west base of Last Chance Mtns, east of Eureka Valley sand dunes
1223
Comment
UCD115863
Lepidium pinnatifidum
J. C. Roos
1956-6-15
s.n.
Los Angeles
Santa Monica Blvd. along railroad tracks between Westwood and Beverly Glen Blvds.
Comment
CLARK-A1528-5233
Lepidium virginicum
John C. Roos
1952-3-19
5405
Riverside
Box Springs Mountains
487
Comment
CAS-BOT-BC329387
Lepidospartum latisquamum
John C. Roos
1950-9-3
4971
San Bernardino
Canyon on S slope Clark Mtn, NW of Mountain Pass, eastern Mohave Desert
1889
Comment
UC1234684
Lepidospartum latisquamum
J. C. Roos
1955-7-22
6500
Inyo
wash Willow Creek; w slope Last Chance Mountains, Willow Creek
1615
Comment
UCR18687
Lepidospartum latisquamum
John C. Roos
1950-9-3
4971 (=4408)
San Bernardino
Eastern Mojave Desert, Clark Mountain, south slope
1890
Comment
UCR24064
Lepidospartum latisquamum
John C. Roos, A. R. Roos
1955-8-24
6539
Inyo
Last Chance Mtns, Near Willow Spring
1829
Comment
UCR24008
Leptochloa filiformis
John C. Roos
1965-9-5
s.n.
Riverside
Sonoran (Colorado) Desert, Blythe
76
Comment
POM266613
Leptochloa fusca subsp. uninervia
J. C. Roos
1937-7-31
2358
San Bernardino
Santa Ana River near San Bernardino.
Comment
RSA47328
Leptochloa fusca subsp. uninervia
J. C. Roos
1949-7-7
4545
San Bernardino
414 Stewart St. Loma Linda.
Comment
RSA659770
Leptochloa fusca subsp. uninervia
J. C. Roos, L. Roos
1951-10-24
5332
Riverside
Flats between Arlington and Pedley
229
Comment
CLARK-A1528-4712
Leptochloa uninervia
John C. Roos
1965-9-5
Riverside
Blythe
Comment
CLARK-A1528-4716
Leptochloa uninervia
John C. Roos
1936-10-9
2509
Orange
Olive
Comment
UCR26336
Leptochloa uninervia
John C. Roos
1946-9-6
2998
San Bernardino
San Bernardino Valley, Near Loma Linda
Comment
CLARK-A1528-3463
Leptodactylon pungens
John C. Roos
1937-8-8
1671
Inyo
Sierra Nevada
Comment
UCR20501
Leptodactylon pungens
John C. Roos
1947-7-13
2891
Inyo
Northern Mojave /Great Basin Desert, Panamint Mountains, east slope of Baldy [= Rogers?] Peak [near Arcane Meadow]
Comment
UCSB42112
Leptosiphon pygmaeus subsp. continentalis
Roos, John
1950-4-22
Riverside
In the hills N.E. of the summit of Reche Canyon
822
Comment
RSA79488
Lesquerella cordiformis
J. C. Roos, A. R. Roos
1953-8-11
6006
Inyo
About 3 miles east of Badger Flat
3110
Comment
CLARK-A1528-5219
Lesquerella kingii
John C. Roos
1949-6-24
4486
San Bernardino
Clark Mountain Range
2255
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
RSA47467
Lessingia glandulifera var. glandulifera
J. C. Roos
1949-6-23
4458
San Bernardino
Near Rock Springs, Mid-hills, New York Mountains.
1463
Comment
CAS-BOT-BC274394
Leucopoa kingii
John Roos; Lucille Roos
1952-7-30
5873
Mono
Crooked Creek, White Mts.
3078
Comment
CHSC1367
Lewisia cotyledon
F. Roos
1930-3-10
Trinity
Trinity Alps.
2133
Comment
UCR24223
Lewisia rediviva var. minor
John C. Roos
1967-6-30
s.n.
San Bernardino
San Bernardino Mtns, east edge of Broom Flat
2409
Comment
CAS-BOT-BC444427
Lewisia rediviva var. minor
John Roos; Lucille Roos
1950-7-27
5825
Inyo
West side Reed Flat, White Mts.
3078
Comment
UCR30814
Lilium parryi
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
POM301529
Limosella acaulis
J. C. Roos
1937-7-19
1160
San Bernardino
South of San Bernardino
Comment
CLARK-A1528-3439
Linanthus aureus
John C. Roos
1942-5-3
1148
Riverside
Joshua Tree
Comment
CLARK-A1528-3464
Linanthus breviculus
John C. Roos
1965-6-26
San Bernardino
Fish Creek
Comment
UCR24234
Linanthus breviculus
John C. Roos
1945-6-27
3724
San Bernardino
San Bernardino Mtns., Barton Flats
2287
Comment
CLARK-A1528-3473
Linanthus dichotomus
John C. Roos
1937-3-25
1322
Kern
Comment
CLARK-A1528-3474
Linanthus dichotomus
John C. Roos
1937-4-17
San Diego
Warner Springs
Comment
CLARK-A1528-3479
Linanthus nuttallii
John C. Roos, Lucille Roos
1951-8-8
5093
Inyo
White Mountains
3169
Comment
CLARK-A1528-3482
Linanthus nuttallii subsp. floribundus
John C. Roos
1962-5-19
Riverside
Santa Ana Mountains
Comment
LA102257
Linanthus pungens
John C. Roos; Alfred R. Roos
1953-8-13
6017
Inyo
Inyo Mountains, crest of Inyo Mts. 3 mi. E of Badger Flat
3169
Comment
CLARK-A1528-3486
Linanthus pygmaeus
John C. Roos
1950-4-22
4757
Riverside
Reche Canyon
822
Comment
CLARK-A1528-4217
Linaria canadensis
John C. Roos
1962-4-7
San Diego
Moosa Canyon
Comment
UCR26172
Linaria canadensis
John C. Roos
1947-3-15
3346
Riverside
San Jacinto Valley, Valle Vista, east of Hemet
549
Comment
RSA85440
Linaria canadensis var. texana
J. C. Roos
1952-4-9
5504
Riverside
north side of Mt. Rubidoux
381
Comment
CLARK-A1528-3208
Linum lewisii
John C. Roos
1947-7-13
2886
Inyo
Panamint Range
3047
Comment
CLARK-A1528-3209
Linum lewisii
John C. Roos
1949-5-28
4365
San Bernardino
Clark Mountain Range
Comment
UCR27435
Lippia lanceolata
John C. Roos
1937-8-30
2344
San Diego
Sweetwater Lake
Comment
UCR23657
Lobelia cardinalis subsp. graminea
John C. Roos
1965-10-2
s.n.
San Bernardino
San Bernardino Mtns, dripping spring, Monkey Face Falls, Mill Creek Canyon
1524
Comment
UCR25990
Lobelia dunnii var. serrata
John C. Roos
1948-7-31
4073
San Bernardino
San Gabriel Mtns, Bonita Falls. Lytle Creek, south of Scotland
1037
Comment
UCR18962
Loeflingia squarrosa
John C. Roos
1952-5-14
5664
Riverside
Perris-Aguanga Basin, 2 mi NW of Perris
Comment
UC1043024
Loeflingia squarrosa var. squarrosa
John C. Roos
1952-5-14
5664
Riverside
along roadside 2 mi nw Perris
487
Comment
UCD134141
Logfia filaginoides
J. C. Roos
1952-4-9
5510
Riverside
southeast face Mt. Rubidoux, Riverside.
335
Comment
UCR26276
Lomatium foeniculaceum
John C. Roos, A. R. Roos
1953-8-9
5964
Inyo
Inyo Mtns, upper Tamarack Canyon
3110
Comment
CAS-BOT-BC211144
Lomatium foeniculaceum subsp. inyoense
John Roos; Lucille Roos
1954-6-24
6149
Inyo
Crest of Inyo Mts. 3 miles east of Badger Flat in headwaters of Marble Canyon Watershed
3169
Comment
SEINET4310255
Lomatium foeniculaceum subsp. inyoense
J. C. Roos
1958-1
Inyo
Near Badger Flat, Inyo Mts., Inyo Co., Calif.
Comment
CAS-BOT-BC211143
Lomatium foeniculaceum subsp. inyoense
John Roos; Lucille Roos
1954-6-24
6149
Inyo
Crest of Inyo Mts. 3 miles east of Badger Flat in headwaters of Marble Canyon Watershed
3169
Comment
RSA0105143
Lomatium foeniculaceum subsp. inyoense
J. C. Roos, A. R. Roos
1953-8-9
5964
Inyo
upper Tamarack Canyon, Inyo Mts.
3110
Comment
CLARK-A1528-1439
Lomatium inyoense
John C. Roos
1959-8-23
Mono
White Mountains
Comment Read comments May 28 2014
SEINET10693594
Lomatium inyoense
John C. Roos, Lucile Roos
1954-6-24
Roos 6149
Inyo
Common on open rocky dry slopes and around pines with Astragalus calycosus, Pinus aristata, Artemisia nova, etc. Crest of Inyo Mts. 3 miles east of Badger Flat in headwaters of Marble Canyon watershed.
3170
Comment
POM262936
Lomatium lucidum
J. C. Roos
1939-5-20
722
San Bernardino
Waterman Canyon; San Bernardino Mts.
762
Comment Read comments Sep 3 2013
CLARK-A1528-1438
Lomatium lucidum
John C. Roos
1939-5-20
722
San Bernardino
San Bernardino Mountains
761
Comment
CLARK-A1528-1444
Lomatium nevadense
John C. Roos
1967-5-13
San Bernardino
San Bernardino Mountains
914
Comment
UCR23402
Lomatium nevadense
John C. Roos
1967-5-30
s.n.
San Bernardino
San Bernardino Mtns, east of Broom Flat
2424
Comment
CLARK-A1528-1443
Lomatium nevadense var. parishii
John C. Roos
1967-5-30
San Bernardino
San Bernardino Mountains
Comment
LA102197
Lonicera subspicata var. denudata
John C. Roos;
1949-7-30
4595
San Diego
N of Pala
Comment
RSA48692
Lonicera subspicata var. denudata
J. C. Roos
1949-7-30
4595
San Diego
North of Pala.
Comment
CLARK-A1528-1129
Lonicera subspicata var. johnstonii
John C. Roos
1937-6-11
1513
San Diego
761
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
CLARK-A1528-2798
Lotus grandiflorus
John C. Roos
1937-5-28
1687
San Bernardino
San Bernardino Mountains
Comment
RSA659791
Lotus grandiflorus
J. C. Roos
1965-6-16
s.n.
San Bernardino
North of Cajon Pass.
Comment
UCR25854
Lotus grandiflorus
John C. Roos
1937-7-20
969
San Bernardino
San Bernardino Mtns., Camp Angelus
1829
Comment
CLARK-A1528-2800
Lotus heermannii
John C. Roos
1952-6-13
5768
Riverside
Pigeon Pass
426
Comment
UCR23902
Lotus nevadensis
John C. Roos
1947-6-27
3714
San Bernardino
San Bernardino Mtns., Glen Martin
1738
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
UCR25550
Lotus scoparius var. brevialatus
John C. Roos
1941-4-25
163
Riverside
Plateau in Reche Canyon
Comment
UCR25917
Lotus tomentellus
John C. Roos
1952-3-28
5426
Imperial
Sonoran (Colorado) Desert, Truckhaven [Salton City], W side of Salton Sea
0
Comment
CAS-BOT-BC60250
Lunaria annua
J. C. Roos
1966-5-14
s.n.
San Bernardino
San Bernardino Mountains. Lytle Creek.
Comment
POM274202
Lupinus argenteus
J. C. Roos
1947-7-13
2874
Inyo
Telescope Peak, Panamint Moutains.
3293
Comment
RSA44899
Lupinus argenteus
J. C. Roos
1947-7-13
2874
Inyo
Telescope Peak, Panamint Moutains.
3293
Comment
RSA92159
Lupinus argenteus
J. C. Roos
1954-6-12
6133
Inyo
East slope Wild Rose Peak, Panamint Mountains
Comment
UC1042978
Lupinus argenteus var. heteranthus
J. C. and A. R. Roos
1954-6-12
6133
Inyo
e slopes Wild Rose Peak; Panamint Mts., e slopes Wild Rose Peak
2621
Comment
UCR25553
Lupinus bicolor subsp. microphyllus
John C. Roos
1941-4-19
169
Riverside
Peninsular Range, Loma Linda Hills/Box Springs Mtns.; plateau in Reche Canyon
671
Comment
UCSB42215
Lupinus breweri
Roos, J.
1965-7-18
San Bernardino
Bear Valley; San Bernardino 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
RSA74566
Lupinus caespitosus
J. C. Roos
1951-8-8
5108
Inyo
Reed flat, White Mts.
3171
Comment
POM265687
Lupinus concinnus subsp. concinnus
J. C. Roos
1937-6-10
1779
San Diego
Jacumba.
Comment
POM263079
Lupinus concinnus subsp. orcuttii
J. C. Roos
1937-4-23
685
San Bernardino
29 Palms, Mojave Desert
Comment
CLARK-A1528-2825
Lupinus confertus
John C. Roos
1946-8-29
2934
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-1156
Lupinus densiflorus
John C. Roos
1937-3-26
689
Kern
152
Comment
UCSB42216
Lupinus excubitus
Roos, J.
1965-7-18
San Bernardino
Along Bear Valley; San Bernardino Mtns.
Comment
CLARK-A1528-2831
Lupinus excubitus subsp. austromontanus
John C. Roos
1937-5-15
1187
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC216705
Lupinus excubitus var. excubitus
J. C. Roos; A. C. Sanders
1965-6-6
s.n.
San Bernardino
Mill Creek near Fallsvale, San Bernardino Mountains
Comment
POM274220
Lupinus excubitus var. excubitus
J. C. Roos
1947-7-13
2862
Inyo
East Slope Baldy Peak, Panamint Mt. Range.
2622
Comment
UCR23947
Lupinus formosus
John C. Roos
1937-8-10
2522
Kern
12 mi N of Caliente
1903
Comment
CLARK-A1528-2837
Lupinus formosus
John C. Roos
1937-5-15
1186
San Bernardino
San Bernardino Mountains
Comment
UCR23950
Lupinus holmgrenianus
John C. Roos
1955-5-15
6374
Inyo
Last Chance Mtns, 2 mi NE of Willow Spring, almost on the Calif.-Nevada state line
2043
Comment
CLARK-A1528-5071
Lupinus nanus
John C. Roos
1937-4-17
511
San Bernardino
Redlands
Comment
UCR25164
Lupinus nanus
John C. Roos, Lucille Roos
1951-5-27
5052
Mariposa
Sierra Nevada Mtns., hills about 8 miles east of Mariposa
1006
Comment
NY802419
Lupinus polyphyllus var. humicola
J. C. Roos
1955-5-15
6374
Inyo
2 miles northeast of Willow Spring, Last Chance Mountains, almost on the Calif-Nevada state line.
2042
Comment
UC1080637
Lupinus shockleyi
John C. Roos
1955-5-13
6360
Inyo
sand dunes at mouth of Marble Canyon mouth of Marble Canyon (w side Eureka Valley); , Mouth of Marble Canyon
1036
Comment
RSA105016
Lupinus shockleyi
J. C. Roos
1955-5-13
6360
Inyo
West side Eureka Valley at mouth of Marble Canyon.
1037
Comment
RSA450195
Lupinus sparsiflorus subsp. sparsiflorus
J. C. Roos
1947-2-22
3295
San Bernardino
Deep Creek, San Bernardino Mtns
Comment
CLARK-A1528-2851
Lupinus truncatus
John C. Roos
1947-3-15
3326
Riverside
Valle Vista
Comment
CLARK-A1528-4951
Lupinus truncatus
John C. Roos
1948-4-24
3788
Riverside
Cabazon
Comment
CAS-BOT-BC231412
Lycium andersonii
J. C. Roos
1966-2-12
s.n.
Riverside
2 miles east of Desert Center
Comment
CLARK-A1528-4346
Lycium andersonii
John C. Roos
1937-4-18
1377
Riverside
Snow Creek
Comment
POM251786
Lycium andersonii
J. C. Roos
1938-4-27
19
Riverside
Hill west of Arlington.
Comment
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
UCR23640
Lycopus americanus
John C. Roos
1937-8-24
1201
San Bernardino
San Bernardino Valley, San Bernardino
305
Comment
CLARK-A1528-3216
Lythrum hyssopifolia
John C. Roos
1938-6-19
Sonoma
Novato
Comment
RSA69830
Machaeranthera asteroides
J. C. Roos
1951-10-19
5330
Riverside
Gilman Hot Springs
459
Comment
RSA450762
Machaeranthera asteroides var. asteroides
J. C. Roos
1965-10-5
s.n.
Riverside
Hemet.
Comment
CLARK-A1528-1995
Machaeranthera canescens
John C. Roos
1937-7-22
1163
San Bernardino
San Gorgonio Wilderness
Comment
RSA335252
Machaeranthera canescens
J. C. Roos
1966-8-13
s.n.
Kern
Fish Creek, San Bernardino Mtns.
2317
Comment Read comments Mar 12 2014
RSA79705
Machaeranthera canescens var. leucanthemifolia
J. C. Roos
1953-8-8
5941
Inyo
Badger flat, Inyo Mountains
2652
Comment
CLARK-A1528-2001
Machaeranthera cognata
John C. Roos
1947-1-2
3226
Riverside
Painted Canyon
Comment
UCR18601
Machaeranthera gracilis
John C. Roos
1949-6-23
4466
San Bernardino
Eastern Mojave Desert, Lanfair Valley, NW of Hackberry Mtn.
1311
Comment
CLARK-A1528-263
Machaeranthera tephrodes
John C. Roos
1951-10-19
5330
Riverside
San Jacinto River
Comment
UCR25221
Madia capitata
John C. Roos
1957-6-28
6617
Sonoma
Schellville
23
Comment
POM262900
Madia elegans subsp. wheeleri
J. C. Roos
1939-5-26
718
San Bernardino
Bear Valley, San Bernardino Mts.
Comment
UCSB45559
Madia exigua
Roos, John
1957-7-2
Sonoma
Miller Ridge
Comment
POM266307
Madia glomerata
J. C. Roos
1937-7-26
1937
San Bernardino
Bear Valley, Pine Knot, San Bernardino Mts.
Comment
CLARK-A1528-1070
Madia minima
John C. Roos
1937-6-5
1470
San Bernardino
San Bernardino Mountains
1523
Comment
RSA44235
Mahonia nevinii
J. C. Roos
1949-7-12
3564
San Bernardino
San Timoteo Canyon, south of Redlands
457
Comment
CLARK-A1528-3232
Malacothamnus densiflorus
John C. Roos
1960-6-5
San Bernardino
Santa Ana Mountains
1066
Comment Read comments Dec 27 2017
RSA78379
Malacothamnus fremontii
J. C. Roos
1951-7-30
5072
Los Angeles
Big Rock Creek, San Gabriel Mts.
1677
Comment
RSA265797
Malacothamnus orbiculatus
J. C. Roos
1942-11-28
2585
San Bernardino
Deep Creek, at head of Hesperia s water flume; north side of San Bernardino Mts.
1037
Comment
CLARK-A1528-2007
Malacothrix clevelandii
John C. Roos
1954-5-15
6119
Riverside
Reche Canyon
731
Comment
UCR24138
Malacothrix clevelandii
John C. Roos
1950-4-22
4756
Riverside
0.3 mi NE of summit of Reche Canyon
762
Comment
CLARK-A1528-2010
Malacothrix saxatilis var. tenuifolia
John C. Roos
1942-10-3
1739
Los Angeles
Westwood Village
Comment
POM262904
Malaxis brachypoda
J. C. Roos
1937-7-22
329
San Bernardino
South Fork, Santa Ana River
2439
Comment
UC1042990
Malosma laurina
John and Lucille Roos
1954-7-10
6191
Riverside
n. side Pigeon Pass; Box Springs Mts.
487
Comment
POM262930
Malva nicaeensis
J. C. Roos
1941-5-18
124
San Bernardino
Loma Linda
Comment
UC1010242
Malva parviflora
John and Lucille Roos
1951-5-5
5034
Riverside
Riverside, Fairmont Park Fairmont Park; Riverside, Fairmont Park
274
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
UCR23603
Malvella leprosa
John C. Roos
1952-6-18
5776
Riverside
Perris-Aguanga Basin region, 1 mi SE of Perris
427
Comment
CAS-BOT-BC67842
Marsilea vestita
John C. Roos
1952-5-21
5704
Riverside
San Jacinto river bottomland 1 1/2 miles southeast of Perris
426
Comment
RSA86902
Matthiola incana
J. C. Roos
1950-8-19
4940
San Diego
Torrey Pines Beach
6
Comment
UCR25951
Matthiola incana
John C. Roos
1937-6-16
s.n.
San Diego
South Coast, Del Mar
Comment
CLARK-A1528-3414
Meconella denticulata
John C. Roos
1942-5-23
1069
Los Angeles
San Gabriel Mountains
0
Comment
CLARK-A1528-2857
Medicago lupulina
John C. Roos
1954-5-31
Los Angeles
Hollywood
Comment
UCR24034
Melica bulbosa
John C. Roos
1942-6-26
1257
Mariposa
4 Mile Trail north of Yosemite Valley
2145
Comment
LA102174
Melica californica
John C. Roos;
1950-4-22
4754
Riverside
Reche Canyon, 0.5 mi NE of the summit
792
Comment Read comments Feb 23 2014
UCR25190
Melica californica
John C. Roos
1951-5-27
5046
Mariposa
Sierra Nevada Mtns., hills about 8 miles east of Mariposa
1006
Comment
RSA78386
Melica californica var. nevadensis
J. C. Roos
1951-5-27
5046
Mariposa
Hills about 8 miles east of Mariposa.
1037
Comment
CLARK-A1528-4723
Melica frutescens
John C. Roos
1942-5-1
1157
Riverside
Dry Morongo Canyon
548
Comment
CLARK-A1528-4724
Melica frutescens
John C. Roos
1952-4-9
5492
Riverside
Riverside
396
Comment
RSA85572
Melica frutescens
J. C. Roos
1952-4-9
5492
Riverside
Mt. Rubidoux
396
Comment
CLARK-A1528-4728
Melica imperfecta
John C. Roos
1937-4-21
Los Angeles
Claremont
Comment
UCR25389
Melica imperfecta
John C. Roos
1937-7-5
449
Ventura
Wheeler Springs along Sespe Creek, north of Ojai
488
Comment
CAS-BOT-BC281056
Melica stricta
John Roos; Lucille Roos
1954-6-25
6154
Inyo
N end Badger Flat, Inyo Mts
2682
Comment
CLARK-A1528-4732
Melica stricta
John C. Roos
1954-6-25
6154
Inyo
Inyo Mountains
Comment
UCR19351
Melica stricta
John C. Roos
1963-6-15
s.n.
San Bernardino
San Bernardino Mtns., Between Fish Creek and Heart Bar Creek
2195
Comment
UCR26335
Melica stricta
John C. Roos
1947-7-14
2856
Inyo
Panamint Mtns., north slope of Baldy Peak
2591
Comment
CLARK-A1528-2861
Melilotus albus
John C. Roos
1965-7-3
Riverside
Riverside
Comment
UCR23894
Melilotus albus
John C. Roos
1942-9-26
1729
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR19128
Melissa officinalis
John C. Roos
1948-4-28
3958
Sonoma
North Coast Ranges, Healdsburg, Mill Creek - Barrell Spring
Comment
RSA301521
Menodora scoparia
J. C. Roos
1937-6-8
1490
San Diego
San Felipe Valley. Western edge of Colorado Desert.
Comment
CLARK-A1528-5350
Mentha arvensis
John C. Roos
1952-8-6
5882
San Bernardino
San Bernardino
304
Comment
RSA69824
Mentha rotundifolia
J. C. Roos
1951-10-2
5311
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-3162
Mentzelia dispersa
John C. Roos
1948-7-4
3897
Inyo
Panamint Mountains
2560
Comment
CLARK-A1528-3166
Mentzelia laevicaulis
John C. Roos
1965-7-24
San Bernardino
San Bernardino Mountains
Comment
RSA0126951
Mentzelia longiloba var. longiloba
J. C. Roos, L. Roos
1949-4-7
4161
Imperial
All America Canal, 5 miles SE of Niland
Comment
POM263281
Mentzelia veatchiana
J. C. Roos
1937-3-25
543
Los Angeles
12 miles west of Lancaster
Comment
CAS-BOT-BC435232
Mesembryanthemum crystallinum
J. C. Roos
1965-6-16
s.n.
Orange
Dana Point.
Comment
UCSB42141
Microsteris gracilis
Roos, John
1966-4-9
San Bernardino
North Shore; 2 miles east of Fawnskin-Bear Valley; San Bernardino Mtns
Comment
RSA444468
Mimulus aurantiacus var. puniceus
Roos
1966-4-29
s.n.
Riverside
Rocky hills between March Air Force Base and Lakeview.
Comment
CLARK-A1528-861
Mimulus bigelovii
John C. Roos
1941-4-12
195
Los Angeles
Palmdale
Comment
UCR19077
Mimulus bigelovii var. bigelovii
John C. Roos
1966-3-20
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 miles southeast of Desert Center
366
Comment
CLARK-A1528-4231
Mimulus bigelovii var. cuspidatus
John C. Roos, Lucille Roos
1952-7-31
5879
Inyo
White Mountains
2438
Comment
CLARK-A1528-4237
Mimulus brevipes
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
RSA450164
Mimulus cardinalis
J. C. Roos
1965-9-11
s.n.
San Bernardino
Mill Creek.
Comment
POM301478
Mimulus floribundus
J. C. Roos
1937-5-10
2330
Riverside
Anual in moist spot in hills west of Perris.
Comment
RSA450075
Mimulus floribundus
J. C. Roos
1952-4-29
5595
Riverside
Pigeon, Box Springs Mts.
457
Comment Read comments May 21 2011
CLARK-A1528-4251
Mimulus guttatus
John C. Roos
1949-6-23
4472
San Bernardino
Rock Springs
1462
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
RSA71393
Mimulus nanus var. mephiticus
J. C. Roos, L. Roos
1951-8-11
5165
Mono
East slope Sheep Mtn, White Mtns.
3354
Comment
CLARK-A1528-4261
Mimulus palmeri
John C. Roos
1937-5-24
2041
San Bernardino
Deep Creek
Comment
POM301477
Mimulus parishii
J. C. Roos
1937-7-16
2424
San Bernardino
Upper Lytle Creek.
Comment
RSA444807
Mimulus pilosus
J. C. Roos
1952-6-8
5745
Riverside
Common along damp sunny bank with Helianthus gracilentus, etc., summit of Reche Canyon near Ferndale school.
Comment
RSA47417
Mimulus pilosus
J. C. Roos, Lucille Roos
1949-6-21
4428
San Bernardino
Sandy soil, southern exposure, New York Peak, eastern San Bernardino Co.
2256
Comment
CLARK-A1528-4267
Mimulus primuloides
John C. Roos
1960-7-4
Mono
White Mountains
Comment
RSA659603
Mimulus primuloides
J. C. Roos
1960-7-4
s.n.
Mono
Crooked Creek, White Mtns.
Comment
CLARK-A1528-4271
Mimulus puniceus
John C. Roos
1966-4-29
Riverside
Lakeview
Comment
RSA71737
Mimulus suksdorfii
J. C. Roos, Lucille Roos
1952-7-28
5854
Inyo
White Mountains; head of Wyman Canyon
3201
Comment
RSA591744
Minuartia douglasii
J. C. Roos
1952-5-26
5726
Riverside
Reche Canyon.
427
Comment
RSA44265
Mirabilis coccinea
J. C. Roos
1949-6-22
3545
San Bernardino
Mouth of Keystone Canyon, New York Mountains
1677
Comment
RSA44266
Mirabilis coccinea
J. C. Roos
1949-6-20
3546
San Bernardino
Ivanpah Mountains, near Kokoweef Peak
Comment
POM262969
Mirabilis laevis var. crassifolia
J. C. Roos
1941-4-25
162
San Bernardino
Reche Canyon, San Bernardino Valley
Comment
POM265640
Mirabilis tenuiloba
J. C. Roos
1937-6-10
1447
Imperial
Coyote Wells, western edge of Colorado Desert.
Comment Read comments Oct 9 2010
UCR23611
Modiola caroliniana
John C. Roos
1956-5-20
6582
San Bernardino
San Bernardino Valley, 114 Taylor St., Loma Linda
396
Comment
RSA85154
Mohavea breviflora
J. C. Roos, Lucille Roos
1954-3-27
6049
Inyo
Mud Canyon, Death Valley.
244
Comment Read comments Aug 26 2014
CLARK-A1528-4225
Mohavea confertiflora
John C. Roos
1937-4-28
1287
Riverside
Desert Center
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
CLARK-A1528-5529
Monanthochloe littoralis
John C. Roos
1937-6-13
1450
San Diego
Imperial Beach
Comment
CLARK-A1528-5234
Monardella lanceolata
John C. Roos
1936-8-15
576
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3146
Monardella linoides
John C. Roos
1965-1-11
Inyo
Panamint Mountains
Comment Read comments Apr 25 2019
POM274232
Monardella linoides
J. C. Roos
1947-7-12
2836
Inyo
Thorndyke s Ranch, Wildrose Canyon, Panamint Mt. Range
Comment
UCR19082
Monardella linoides subsp. linoides
John C. Roos
1946-9-14
3009
Riverside
Santa Rosa Mountains, Taylor, desert slope on Palms to Pines Highway
1098
Comment
UCR23567
Monardella odoratissima
John C. Roos
1966-9-3
s.n.
San Bernardino
San Bernardino Mtns, along a rocky ridge between upper Fish Creek and North Fork Whitewater meadows
2988
Comment
UCR25682
Monardella odoratissima
John C. Roos, A. R. Roos
1953-8-9
5951
Inyo
Inyo Mtns, Tamarack Canyon
2744
Comment
CLARK-A1528-4884
Monardella odoratissima subsp. australis
John C. Roos
1937-7-20
1177
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-3152
Monardella odoratissima subsp. parvifolia
John C. Roos, Lucille Roos
1952-7-27
5828
Inyo
White Mountains
3108
Comment
RSA71723
Monardella odoratissima subsp. parvifolia
J. C. Roos
1952-7-27
5828
Inyo
West rim of Reed Flat, White Mtns.
3110
Comment
UCR30513
Monardella villosa
John C. Roos
1937-7-4
335
Santa Barbara
Lower Cuyama Valley
Comment
CLARK-A1528-2586
Monolepis nuttalliana
John C. Roos
1949-4-8
4200
Imperial
Palo Verde Valley
Comment
UCR19022
Monolepis nuttalliana
John C. Roos, L. Roos
1952-7-28
5852
Inyo
White Mountains, roadside at head of Wyman Canyon
3140
Comment Read comments May 8 2011
UCR30582
Monolepis nuttalliana
John C. Roos
1966-3-1
s.n.
Riverside
Perris basin, San Jacinto River bottom at Perris.
Comment
RSA658694
Monolepis nuttalliana
J. C. Roos
1949-4-8
4200
Imperial
South of Palo Verde.
Comment Read comments Aug 28 2016
CLARK-A1528-2015
Monolopia lanceolata
John C. Roos
1937-3-26
2477
Kern
Comment
UCR25775
Monoptilon bellidiforme
John C. Roos
1937-4-23
781
San Bernardino
Southern Mojave Desert, Twentynine Palms
762
Comment
UC1010187
Montia chamissoi
John and Lucille Roos
1951-8-10
5133
Mono
White Mountains, McAfee Meadow McAfee Meadow; White Mountains, McAfee Meadow
3657
Comment
RSA71691
Montia chamissoi
J. C. Roos
1952-7-30
5862
Mono
Crooked Creek, White Mts.
2744
Comment
POM302530
Muhlenbergia andina
J. C. Roos
1943-11-6
2746
San Bernardino
Upper Mill Creek
2134
Comment
RSA658426
Muhlenbergia andina
J. C. Roos
1965-9-11
s.n.
San Bernardino
At the quarry in Mill Creek Canyon, San Bernardino Mountains
Comment
CLARK-A1528-4746
Muhlenbergia arsenei
John C. Roos, Alfred R. Roos
1950-8-5
4896
San Bernardino
Clark Mountain Range
1737
Comment
UC1023414
Muhlenbergia arsenei
J. C. and A. R. Roos
1950-8-5
4896
San Bernardino
1 1/2 mi. s.w. Coliseum Mine; Mojave Desert, Clark Mts.
1737
Comment
CLARK-A1528-76
Muhlenbergia asperifolia
John C. Roos
1951-9-25
5257
Riverside
Riverside
259
Comment
RSA78219
Muhlenbergia californica
J. C. Roos
1951-7-30
5075
Los Angeles
Big Rock creek, north of Mt. Baden Powell, San Gabriel Mountains. Alt. 6500 ft.
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
GH355759
Muhlenbergia porteri
J. C. Roos
1955-5-13
6341
Unknown
west base of Last Chance Mts., east of Eureka Valley sand dunes.
1219
Comment
SD52952
Muhlenbergia porteri
John C. Roos, A. R. Roos
1955-8-25
6546
Inyo
Loretto road, 1 mile west of Loretto Mine, east slope Inyo Mts.
1584
Comment
CLARK-A1528-4762
Muhlenbergia richardsonis
Alfred R. Roos
1937-8-19
10679
Riverside
San Jacinto Mountains
Comment
POM266637
Muhlenbergia rigens
J. C. Roos
1937-7-23
2397
Santa Barbara
Los Olivos
Comment
UCR19373
Muhlenbergia rigens
John C. Roos
1965-6-30
s.n.
Riverside
Santa Ana Mtns., Ortega Hwy
Comment
UCR30809
Nama californica
John C. Roos
1949-7-23
4579
San Bernardino
San Bernardino Mtns., Holcomb Valley
Comment
UCR23564
Nama demissa
John C. Roos
1966-3-26
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Mountains, 2 mi SE of Desert Center
366
Comment
UCR25803
Nama depressa
John C. Roos, L. Roos
1952-5-10
5635
San Bernardino
Western Mojave Desert, 4 mi. northwest of Adelanto, near Red Raven Mine
823
Comment
UCR26302
Nama hispida
John C. Roos
1949-4-8
4197
Imperial
Sonoran (Colorado) Desert, Milpitas Wash.
Comment
CLARK-A1528-5061
Nama hispida var. spathulata
John C. Roos
1949-4-9
4203
Riverside
Desert Center
274
Comment
CLARK-A1528-2983
Nama stenocarpa
John C. Roos
1952-5-28
5728
Riverside
Perris
426
Comment
CLARK-A1528-2984
Nama stenocarpa
John C. Roos
1951-10-19
5327
Riverside
San Jacinto Valley
457
Comment
CLARK-A1528-5488
Nama stenocarpa
John C. Roos
1951-10-19
5327
Riverside
San Jacinto Valley
457
Comment
CLARK-A1528-3448
Navarretia atractyloides
John C. Roos
1952-6-14
5769
San Bernardino
Yucaipa
914
Comment
UCSB42147
Navarretia atractyloides
Roos, John; Roos, Lucille
1952-6-14
San Bernardino
in Yucaipa
Comment
CLARK-A1528-3449
Navarretia breweri
John C. Roos, Lucille Roos
1952-7-28
5855
Inyo
White Mountains
3200
Comment
UCR24246
Navarretia hamata
John C. Roos, L. Roos
1952-6-14
5769
San Bernardino
San Bernardino Mtns. foothills/San Bernardino Valley, Yucaipa, abandoned grain field
915
Comment
UCR24248
Navarretia hamata subsp. leptantha
Alfred R. Roos
1941-6-14
s.n.
Orange
Corona del Mar
91
Comment
POM263049
Navarretia peninsularis
J. C. Roos
1937-7-26
340
San Bernardino
Bear Valley, Pine Knot.
Comment
OBI36027
Navarretia squarrosa
John C. Roos
1950-7-22
4878
Sonoma
2 miles east of Duncan Mills
61
Comment
UCR19196
Navarretia squarrosa
John C. Roos
1950-7-20
4863
San Francisco
San Francisco Bay Region, San Francisco City College
91
Comment
RSA659774
Nemacladus glanduliferus var. orientalis
J. C. Roos
1949-4-9
4205
San Bernardino
Roadside NW of Cross Roads, Whipple Mtns.
Comment
UCR31680
Nemacladus longiflorus var. longiflorus
John C. Roos
1947-3-15
3343
Riverside
Peninsular Range; San Jacinto Valley/ San Jacinto Mtns. Foothills, 1 mile east of Valle Vista
549
Comment
UCR25988B
Nemacladus sigmoideus
John C. Roos
1947-3-15
3354 B
Riverside
Sonoran (Colorado) Desert, Santa Rosa Mountains, mouth of Deep Canyon at foot of mtns.
366
Comment
SEINET10460866
Nemacladus sigmoideus
Roose
1952-5-10
ROOSE 5634
San Bernardino
853
Comment
A37211
Nitrophila mohavensis
J. C. Roos & A. R. Roos
1954-6-13
6140
Unknown
Open flats of Amargosa Desert 3 miles northeast of Death Valley Junction along Ash Meadows road, 2050 feet
Comment
NY32586
Nitrophila mohavensis
J. C. Roos
1954-7-18
6194
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
RSA89532
Nitrophila mohavensis
J. C. Roos
1954-5-7
6079
Inyo
Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road
625
Comment
SD50072
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
UC1010485
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
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
CLARK-A1528-1497
Nolina parryi subsp. wolfii
John C. Roos, Lucille Roos
1952-10-18
5904
Riverside
Little San Bernardino Mountains
1219
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
CLARK-A1528-3568
Notholaena sinuata var. cochisensis
John C. Roos
1949-5-29
3532
San Bernardino
Clark Mountain
1462
Comment
POM264312
Oenanthe sarmentosa
J. C. Roos
1937-6-6
660
San Bernardino
San Bernardino.
Comment
RSA47544
Oenothera avita subsp. avita
J. C. Roos, L. Roos
1949-6-22
4450
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
CLARK-A1528-3300
Oenothera avita subsp. eurekensis
John C. Roos, Alfred R. Roos
1955-4-9
6318
Inyo
Eureka Valley
944
Comment
CLARK-A1528-3347
Oenothera californica
John C. Roos
1937-5-19
2058
San Bernardino
Comment
CLARK-A1528-5355
Oenothera heterochroma subsp. monoensis
John C. Roos, Alfred R. Roos
1954-8-14
6213
Inyo
Inyo Mountains
2316
Comment
CLARK-A1528-3351
Oenothera hookeri
John C. Roos
1946-10-5
3106
San Bernardino
San Bernardino Mountains
1356
Comment
UCR23341
Onychium densum
John C. Roos
1938-12-10
286
Napa
North Coast Range, Blake's Canyon, Pacific Union College, Angwin
Comment
CLARK-A1528-2361
Opuntia basilaris
John C. Roos
1937-4-18
Riverside
Snow Creek
Comment
POM263142
Oreonana vestita
J. C. Roos
1937-7-16
390
Los Angeles
Mt. San Antonio [Los Angeles-San Bernardino County line]
2744
Comment
CLARK-A1528-1347
Orobanche cooperi
John C. Roos
1948-5-15
3848
Riverside
Eagle Mountains
Comment
UCR23523
Orobanche fasciculata
John C. Roos
1947-3-8
3317
San Bernardino
San Bernardino Mountains, Deep Creek
1159
Comment
RSA0059180
Orobanche fasciculata
John C. Roos
1937-6-15
1466
San Diego
Public Camp, south of Cuyamaca Lake.
Comment
RSA0066490
Orobanche parishii
John C. Roos
1937-7-4
1611
Santa Barbara
Upper Cuyama Valley, near Wagy Ranch.
Comment
CLARK-A1528-5740
Orthocarpus
John C. Roos
1937-7-2
469 b
Santa Barbara
Comment
CLARK-A1528-4280
Orthocarpus attenuatus
John C. Roos
1937-6-14
4
San Diego
Comment
CLARK-A1528-4772
Oryzopsis hymenoides
Alfred R. Roos
1937-4-18
2397
Riverside
Snow Creek
Comment
CLARK-A1528-5583
Oryzopsis hymenoides
John C. Roos
1938-4-18
8717
Inyo
Death Valley National Park
Comment
RSA0080081
Oryzopsis hymenoides
A. R. Roos
1937-4-18
s.n.
Riverside
Snow Creek.
Comment
CLARK-A1528-1283
Oryzopsis micrantha
John C. Roos, R. Weatherby
1949-9-2
3571
San Bernardino
Kingston Range
2163
Comment
CLARK-A1528-1284
Oryzopsis miliacea
John C. Roos, Lucille Roos
1953-11-29
6043
San Luis Obispo
San Luis Obispo
91
Comment
UCR19346
Oryzopsis webberi
John C. Roos
1958-4-5
s.n.
Inyo
Inyo Mountains, near Badger Flats
Comment
CLARK-A1528-5701
Oxalis corniculata
John C. Roos
1949-11-18
4697
San Bernardino
San Bernardino Valley
Comment
CLARK-A1528-3284
Oxybaphus coccineus
John C. Roos
1949-6-20
3546
San Bernardino
Kokoweed Peak
1523
Comment
CLARK-A1528-3751
Oxyria digyna
John C. Roos
1951-8-10
5150
Mono
White Mountains
4023
Comment
RSA662419
Oxystylis lutea
J. C. Roos
1965-7-11
s.n.
Inyo
Amargosa River at Eagle Mountain, south of Death Valley Junction.
610
Comment
CLARK-A1528-1128
Oxystylis lutea
John C. Roos
1965-7-11
Inyo
Eagle Mountain
609
Comment
CAS-BOT-BC413264
Oxytheca dendroidea subsp. dendroidea
J. C. Roos
1955-7-23
6504
Inyo
Soldier Flat, east base Waucoba Mountain, Inyo Mountains
2194
Comment
UC1042985
Oxytheca dendroidea subsp. dendroidea
John and Lucille Roos
1954-6-27
6166
Inyo
flats 1.5 mi e Andrews Mtn.; Inyo Mts.
2545
Comment
CLARK-A1528-3757
Oxytheca parishii
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
Comment
RSA450148
Oxytheca parishii var. parishii
J. C. Roos
1965-10-2
s.n.
San Bernardino
Camp Angelus, San Bernardino Mtns.
Comment
CLARK-A1528-3761
Oxytheca perfoliata
John C. Roos
1965-6-16
San Bernardino
Comment
UC1234664
Oxytropis borealis var. australis
J. C. and A. R. Roos
1955-8-26
6557
Inyo
summit Waucoba Mt.; Inyo Mtns.
3383
Comment
CAS-BOT-BC202199
Oxytropis parryi
John Roos; Lucille Roos
1951-8-10
5160
Mono
1 mile north of Sheep Mtn., White Mts.
3627
Comment
CAS-BOT-BC317013
Packera multilobata
John C. Roos; L. Roos
1951-8-8
5101
Mono
White Mts., Big Prospector Meadow
3200
Comment
CLARK-A1528-5815
Paeonia brownii
John C. Roos, Lucille Roos
1952-3-1
5381
Riverside
San Timoteo Canyon
518
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
RSA153104B
Panicum capillare
J. C. Roos, E. C. Jaeger
1955-7-23
6518
Inyo
Saline Valley below mouth of Hunter Canyon
351
Comment
RSA648670
Panicum capillare
J. C. Roos
1946-9-6
2997
San Bernardino
Warm Creek south of San Bernardino.
Comment
RSA69872
Panicum capillare
J. C. Roos
1951-9-25
5255
Riverside
Fairmount Park
259
Comment
CLARK-A1528-4784
Panicum hirticaule
John C. Roos
1965-9-5
Riverside
Comment
UCR23249
Panicum miliaceum
John C. Roos
1958-5-10
s.n.
San Bernardino
San Bernardino Valley, 204 Tulip, Loma Linda
Comment
CLARK-A1528-4788
Panicum urvilleanum
John C. Roos
1737-4-28
1283
Riverside
Whitewater
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-A1528-4389
Parietaria floridana
John C. Roos, Lucille Roos
1955-4-6
6297
Inyo
Inyo Mountains
502
Comment
CLARK-A1528-4390
Parietaria floridana
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
UCR24392
Parnassia cirrata
John C. Roos
1965-9-11
s.n.
San Bernardino
San Bernardino Mtns, quarry near Mill Creek
2073
Comment
UCR23701
Parvisedum pumilum
John C. Roos
1939-4-18
296
Napa
North Coast Range, Deer Lake. [near] Pacific Union College, Angwin
610
Comment
CLARK-A1528-4789
Paspalum dilatatum
John C. Roos
1949-11-16
4696
San Bernardino
Loma Linda
323
Comment
CLARK-A1528-4790
Paspalum dilatatum
John C. Roos
1947-5-11
3605
Los Angeles
Los Angeles
Comment
POM301691
Paspalum dilatatum
J. C. Roos
1942-10-1
1736
Los Angeles
North Boyle and Brooklyn Ave.
Comment
UCR24139
Pectis papposa
John C. Roos, L. Roos
1961-10-21
s.n.
Inyo
Northern Mojave Desert, Eureka Valley
Comment
UCR18795
Pectocarya linearis
John C. Roos
1948-4-10
3785
San Bernardino
San Bernardino Valley, SW of Loma Linda
Comment
RSA450446
Pectocarya penicillata
J. C. Roos
1966-4-5
s.n.
Riverside
Winchester
Comment Read comments Mar 20 2011
UCR23545
Pectocarya penicillata
John C. Roos
1966-4-5
s.n.
Riverside
Hills near Winchester
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
NY802603
Pediomelum castoreum
J. C. Roos
1952-5-10
5642
San Bernardino
4 miles northwest of Adelanto, near Red Haven Mine
823
Comment
POM261207
Pellaea breweri
J. C. Roos
1941-8-17
44
Inyo
Panamint Mountains:
3048
Comment
CLARK-A1528-4298
Penstemon caesius
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
2438
Comment
CLARK-A1528-4299
Penstemon calcareus
John C. Roos, Lucille Roos
1954-5-8
6102
Inyo
Grapevine Mountains
1310
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
RSA44238
Penstemon eatonii subsp. undosus
J. C. Roos
1949-5-29
3527
San Bernardino
Edge of rocky was, north slope of Clark Mountain
1646
Comment
RSA71751
Penstemon floridus
J. C. Roos, L. Roos
1952-7-28
5838
Inyo
Wyman Canyon, White Mts.
2591
Comment
RSA40599
Penstemon fruticiformis
J. C. Roos
1947-7-15
2867
Inyo
Rocky slope of canyon bottom, Wildrose Canyon. Panamint Mts.
1677
Comment
UCR23262
Penstemon fruticiformis
John C. Roos
1947-4-20
3518
Inyo
Northern Mojave Desert, Panamint Mtns: Emigrant Pass
1555
Comment
CLARK-A1528-4303
Penstemon grinnellii
John C. Roos
1965-7-17
San Bernardino
San Bernardino Mountains
Comment
RSA71790
Penstemon heterodoxus subsp. heterodoxus
J. C. Roos, L. Roos
1951-8-8
5096
Mono
Big Prospector Meadow, White Mountains.
3201
Comment
CLARK-A1528-4309
Penstemon heterophyllus
John C. Roos
1937-6-15
631
San Diego
Cuyamaca Lake
Comment
OBI30458
Penstemon heterophyllus
J. C. Roos
1947-5-17
3632
Los Angeles
Placerita Cyn
Comment
POM263245
Penstemon heterophyllus
J. C. Roos
1937-6-15
631
San Diego
Near Cuyamaca Lake, Cuyamaca Mountains.
Comment
UC1236264
Penstemon monoensis
John C. Roos
1955-5-16
6389
Inyo
Waucoba road 7 mi e Big Pine (w side Inyo Mts.); , e of Big Pine
1615
Comment
CAS-BOT-BC243398
Penstemon scapoides
John Roos; Lucille Roos
1952-7-28
5853
Inyo
Wyman Canyon, White Mts.
2743
Comment
NY651577
Penstemon scapoides
J. C. Roos
1953-8-8
5936
Inyo
Hill behind Blue Bell Mine, Badger Flat, Inyo Mountains
2743.2
Comment
UC1010332
Penstemon scapoides
J. C. and A. R. Roos
1953-8-8
5936
Inyo
hill behind Blue Bell Mine (Badger Flat); Inyo Mts., Badger Flat
2743
Comment
UCR19059
Penstemon scapoides
John C. Roos, L. Roos
1952-7-28
5853
Inyo
White Mtns., Wyman Canyon
2744
Comment Read comments Dec 6 2011
CLARK-A1528-4316
Penstemon speciosus
John C. Roos
1958-7-5
Inyo
Inyo Mountains
Comment
RSA155666
Penstemon speciosus
J. C. Roos
1955-6-17
6402
Inyo
2 miles NE of Willow Springs, Last Chance Mountains.
2012
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
RSA71709
Peraphyllum ramosissimum
J. C. Roos, L. Roos
1952-7-31
5880
Inyo
NW of Cedar Flat, White Mountain
2439
Comment
HSC78589
Pericome caudata
J. C. Roos
1956-8-29
6595
Inyo
Head of Death Valley Canyon, Panamint Mtns.
Comment
UC1494260
Pericome caudata
J. C. Roos
1956-8-29
6595
Inyo
Death Valley Canyon, at the head Panamint Mtns.
Comment
UCD134879
Pericome caudata
J. C. Roos
1956-8-29
6595
Inyo
at the head of Death Valley Canyon in the Panamint Mountains.
Comment
CLARK-A1528-5375
Perityle megalocephala
John C. Roos, Alfred R. Roos
1954-8-14
6217
Inyo
Inyo Mountains
2179
Comment
CAS-BOT-BC328113
Perityle megalocephala var. megalocephala
J. C. Roos; A. R. Roos
1953-8-10
5979
Inyo
Mazourka Canyon, Inyo Mountains
2499
Comment
RSA79708
Perityle megalocephala var. megalocephala
J. C. Roos
1953-8-8
5938
Inyo
Blue Bell Mine, Badger flat, Inyo Mountains
2744
Comment
CLARK-A1528-5340
Perityle megalocephala var. oligophylla
John C. Roos
1953-8-10
5979
Inyo
Inyo Mountains
2499
Comment
CAS-BOT-BC419365
Persicaria punctata
J. C. Roos
13 September
s.n.
San Bernardino
Victorville. Mojave River bottom
Comment
CLARK-A1528-3172
Petalonyx linearis
John C. Roos
1949-6-2
4150
Riverside
Chocolate Mountains
Comment
UCR19125
Petalonyx thurberi
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
UCR19126
Petalonyx thurberi
John C. Roos
1965-6-23
s.n.
Riverside
Sonoran (Colorado) Desert, Eagle Mtns, Lost Palms Wash
Comment
UCR18906
Petrophytum caespitosum
John C. Roos
1948-9-18
4043
San Bernardino
Eastern Mojave Desert, Clark Mountain
1982
Comment
CLARK-A1528-1203
Petunia parviflora
John C. Roos
1937-6-7
514
Riverside
Comment
CLARK-A1528-2030
Peucephyllum schottii
John C. Roos
1947-2-15
3247
Riverside
Eagle Mountains
Comment
POM264088
Phacelia brachyloba
J. C. Roos
1937-6-7
669
Riverside
South of Sage.
Comment Read comments Oct 7 2014
CLARK-A1528-2995
Phacelia cicutaria
John C. Roos
1965-6-19
Riverside
Santa Ana Mountains
Comment
UCSB42177
Phacelia cicutaria var. hispida
Roos, John
1965-6-19
Riverside
Sky Line Drive, south of Corona, Santa Ana Mtns.
Comment
CLARK-A1528-5436
Phacelia crenulata
John C. Roos
1966-3-20
Riverside
Chuckwalla Mountains
Comment
RSA0110944
Phacelia curvipes
J. C. Roos
1955-6-17
6417
Inyo
Two miles northeast of Willow Springs, Last Chance Mountains.
2012
Comment
UC1236239
Phacelia distans
John C. Roos
1955-5-15
6367
Inyo
0.5 mi w Willow Spring; Last Chance Mts.
1767
Comment
POM263547
Phacelia fremontii
J. C. Roos
1937-3-25
680
Los Angeles
20 miles E of Palmdale
Comment
CLARK-A1528-3010
Phacelia minor
John C. Roos
1947-3-21
3374
Riverside
Reche Canyon
Comment
POM263135
Phacelia minor
J. C. Roos
1941-3-8
205
San Bernardino
Reche Canyon.
Comment
CLARK-A1528-5077
Phacelia mutabilis
John C. Roos
1937-7-22
684
San Bernardino
San Bernardino Mountains
Comment
RSA425017
Phacelia parryi
J. C. Roos
1962-4-7
s.n.
San Diego
Moosa Canyon near Bonsall.
Comment Read comments Aug 8 2014
CLARK-A1528-5080
Phacelia parryi
John C. Roos
1941-4-25
161
San Bernardino
San Bernardino
Comment
UCR23724
Phacelia perityloides
John C. Roos
1955-4-6
6287
Inyo
Northern Mojave Desert, mouth of Beveridge Canyon, east side of Inyo Mtns.
671
Comment
UCSB42180
Phacelia ramosissima
Roos, John
1965-6-27
San Bernardino
Loma Linda Hills
304
Comment
CAS-BOT-BC154420
Phacelia ramosissima var. latifolia
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
304
Comment
UC1236256
Phacelia rotundifolia
John C. Roos
1955-5-13
6327
Inyo
e Eureka Valley sand dunes; west base Last Chance Mts.
1158
Comment
POM263275
Phacelia viscida
J. C. Roos
1937-7-7
404
Los Angeles
On earth fill, La Crescenta
Comment
CLARK-A1528-4795
Phalaris lemmonii
John C. Roos
1940-6-11
1913
Marin
Novato
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-A1528-4803
Phalaris minor
John C. Roos
1952-4-21
5564
San Bernardino
Loma Linda
304
Comment
POM263105
Phalaris minor
J. C. Roos
1937-5-10
431
Orange
Tustin
Comment
RSA85489
Phalaris minor
J. C. Roos
1952-4-21
5564
San Bernardino
Loma Linda
305
Comment
UC1043020
Phalaris paradoxa
John C. Roos
1952-5-21
5702
Riverside
1 1/2 mi se Perris; San Jacinto River bottomland
426
Comment
UCR19277
Phalaris paradoxa
John C. Roos
1952-5-21
5702
Riverside
Perris-Aguanga Basin region, San Jacinto River bottomland 1.5 mi. SE of Perris.
427
Comment
UCR19222
Philadelphus microphyllus subsp. stramineus
John C. Roos, L. Roos
1952-7-28
5843
Inyo
White Mtns, Wyman Canyon
2683
Comment
SEINET218257
Philadelphus microphyllus var. stramineus
John Roos
1941-1
46
Inyo
Panamint Mts. East slope of Mt. Baldy.
Comment
CLARK-A1528-4804
Phleum alpinum
John C. Roos
1937-7-22
1173
San Bernardino
South Fork Meadows
Comment
UCR19287
Phleum alpinum
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
RSA659633
Phleum pratense
J. C. Roos
1965-7-18
s.n.
San Bernardino
Moonridge, Bear Valley, San Bernardino Mountains.
Comment
CLARK-A1528-3453
Phlox dolichantha
John C. Roos
1949-7-16
4564
San Bernardino
San Bernardino Mountains
2224
Comment
RSA74568
Phlox pulvinata
J. C. Roos
1951-8-10
5141
Mono
Saddle 1 mile SE of White Mountain Peak.
3963
Comment
CLARK-A1528-3454
Phlox stansburyi
John C. Roos, Lucille Roos
1952-7-27
5837
Inyo
White Mountains
Comment
CLARK-A1528-5106
Pholistoma membranaceum
John C. Roos
1937-4-18
San Diego
Jacumba
Comment
CLARK-A1528-4421
Phoradendron longispicum
John C. Roos
1952-3-26
5420
Riverside
Riverside
259
Comment
CLARK-A1528-4812
Phragmites australis
John C. Roos
1965-9-22
San Bernardino
Victorville
Comment
CLARK-A1528-4967
Phyllodoce breweri
John C. Roos
1941-6-5
109
San Bernardino
Mount San Gorgonio
2895
Comment
CLARK-A1528-4427
Phyllospadix torreyi
John C. Roos
1960-8-27
Orange
Dana Point
Comment
CLARK-A1528-4356
Physalis acutifolia
John C. Roos
1965-9-5
Riverside
Blythe
Comment
RSA444461
Physalis crassifolia
Roos
1965-6-23
s.n.
Riverside
Lost Palms Wash.
Comment
CLARK-A1528-4362
Physalis hederifolia var. cordifolia
John C. Roos
1948-9-18
4070
San Bernardino
Clark Mountain
1615
Comment
POM262872
Physalis philadelphica
J. C. Roos
1940-10-26
220
San Bernardino
Loma Linda.
Comment
UC1010211
Physalis pubescens var. grisea
J. C. and A. R. Roos
1954-8-15
6221
Inyo
below mouth of Hunter Canyon (Saline Valley); Saline Valley
365
Comment
CAS-BOT-BC140538
Physocarpus alternans
J. C. Roos
1965-7-10
s.n.
Inyo
Eagle Springs, Panamint Mtns.
Comment
CLARK-A1528-4014
Physocarpus alternans
John C. Roos
1965-7-10
Inyo
Panamint Mountains
Comment
UCSB37793
Physocarpus alternans
Roos, John
1965-7-10
Inyo
Eagle Springs, Panamint Mtns
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-A1528-279
Picris echioides
John C. Roos
1951-9-25
5280
Riverside
Riverside
259
Comment
CLARK-A1528-3841
Pilostyles thurberi
John C. Roos
1963-6-1
Imperial
Comment
SBBG54105
Pilostyles thurberi
J. C. Roos
1960-6-1
Imperial
0.6 mi SE of San Felipe wash bridge near Kane Spring
-54
Comment
RSA450183
Pinus albicaulis
J. C. Roos
1965-8-9
s.n.
Inyo
Heart Lake, Independence Creek.
Comment
CLARK-A1528-3549
Pinus flexilis
John C. Roos
1947-7-13
2818
Inyo
Panamint Mountains
3352
Comment
CLARK-A1528-3626
Pinus flexilis
John C. Roos
1947-7-14
2816
Inyo
Panamint Mountains
2621
Comment
CAS-BOT-BC73061
Pinus longaeva
John Roos; Lucille Roos
1947-7-13
2819
Inyo
Telescope Peak, Panamint Mts.
3322
Comment
CAS-BOT-BC78816
Pinus longaeva
J. C. Roos; A. R. Roos
1953-8-9
5956
Inyo
upper end Tamarack Canyon, Inyo Mts.
3048
Comment
RSA72077
Pinus longaeva
J. C. Roos, Lucille Roos
1951-8-12
5186
Inyo
Reed Flat, White Mountains
3171
Comment
CLARK-A1528-3558
Pinus monophylla
John C. Roos
1948-9-18
4072
San Bernardino
Clark Mountain
1737
Comment
UCR19274
Pinus monophylla
John C. Roos
1965-7-10
s.n.
Inyo
Northern Mojave Desert, Death Valley National Monument. Trail to Telescope Peak near Mahogany Flat
2500
Comment
CLARK-A1528-3559
Pinus monophylla
John C. Roos
1947-7-14
2817
Inyo
Panamint Mountains
2468
Comment
UCR23372
Pinus ponderosa
John C. Roos
1947-5-31
3669
Los Angeles
San Gabriel Mountains, Big Pines
2134
Comment
CAS-BOT-BC72839
Pinus quadrifolia
J. C. Roos
1965-8-18
s.n.
Riverside
Summit of Pines to Palm Hwy., Thomas Valley, San Jacinto Mtns.
Comment
RSA450184
Pinus quadrifolia
J. C. Roos
1965-8-18
s.n.
Riverside
Summit of Pines to Palm Hwy., Thomas Valley, San Jacinto Mtns.
Comment
UCR19284
Pinus quadrifolia
John C. Roos
1947-4-5
3436
Riverside
San Jacinto Mtns., Head of Thomas Valley
1463
Comment Read comments Oct 25 2011
UCR19348
Piptatherum miliaceum
John C. Roos, L. Roos
1953-11-29
6043
San Luis Obispo
San Luis Obispo. Polytechnic College Campus
91
Comment
CAS-BOT-BC254443
Piptatherum miliaceum
John Roos; Lucille Roos
1953-11-29
6043
San Luis Obispo
Near chicken pens, California Polytechnic College campus, San Luis Obispo
91
Comment
CAS-BOT-BC254444
Piptatherum miliaceum
John Roos; Lucille Roos
1953-11-29
6043
San Luis Obispo
Near chicken pens, California Polytechnic College campus, San Luis Obispo
91
Comment
CLARK-A1528-3591
Pityrogramma triangularis
John C. Roos
1936-11-21
Riverside
La Sierra
Comment
CLARK-A1528-3805
Pityrogramma triangularis
John C. Roos
1949-6-27
4521
San Bernardino
Kingston Range
1645
Comment
HSC78529
Plagiobothrys canescens
J. C. Roos
1966-3-24
Riverside
Winchester
Comment
UCR25420
Plagiobothrys canescens
John C. Roos
1952-4-30
5605
Riverside
Peninsular Range, hills between Camp Haan and Riverside
534
Comment
RSA85111
Plagiobothrys nothofulvus
J. C. Roos
1952-4-16
5559
Riverside
Box Springs Mountains, Pigeon Pass.
396
Comment
CAS-BOT-BC228481
Plagiobothrys parishii
J. C. Roos
1949-4-30
4270
San Bernardino
Rabbit Spr., Lucerne Valley
883
Comment
RSA45208
Plagiobothrys parishii
J. C. Roos, L. Roos
1949-4-30
4270
San Bernardino
Rabbit Springs
884
Comment
UCR25923
Plagiobothrys salsus
John C. Roos, L. Roos
1954-5-7
6075
Inyo
Amargosa Desert, 3 mi NE of Death Valley Junction, on Ash Meadows Road
625
Comment
RSA78328
Plagiobothrys torreyi
J. C. Roos
1951-6-9
5062
San Bernardino
Running Springs
1829
Comment
CLARK-A1528-3433
Plantago aristata
John C. Roos
1950-6-11
4831
San Bernardino
Loma Linda
304
Comment
CLARK-A1528-3434
Plantago erecta
John C. Roos
1937-3-5
1300
Riverside
La Sierra
Comment
CLARK-A1528-693
Plantago hirtella subsp. galeottiana
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-A1528-3422
Plantago major
John C. Roos
1950-5-13
4806
San Bernardino
Rabbit Springs
883
Comment
CLARK-A1528-697
Plantago major
John C. Roos
1951-9-25
5274
Riverside
Riverside
259
Comment
UCR24220
Plantago patagonica
John C. Roos
1949-6-22
4439
San Bernardino
Eastern Mojave Desert, New York Mtns., at and near Lecyr Well
1524
Comment
UCR26252
Plantago patagonica
John C. Roos
1940-5-11
853
San Bernardino
San Bernardino Mtns., Mill Creek, just below bridge
1372
Comment
POM301485
Plantago virginica
J. C. Roos
1937-6-13
1709
San Diego
San Isidro
Comment Read comments May 24 2009
UCSB42165
Plantago virginica
Roos, A.
1938-6-12
San Bernardino
Loma Linda
Comment
UCR19154
Platanthera sparsiflora
John C. Roos
1949-7-4
4542
San Bernardino
San Bernardino Mtns., Vivian Creek
2165
Comment
CLARK-A1528-3419
Platanus racemosa
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
POM263492
Plectritis ciliosa subsp. insignis
J. C. Roos
1939-3-27
263
Napa
Pope Valley
Comment
CAS-BOT-BC326720
Pleiacanthus spinosus
John C. Roos
1947-7-11
2902
Inyo
Mahogany Flats, Panamint Mts.
2438
Comment
RSA44253
Pleuraphis jamesii
J. C. Roos
1949-5-29
3538
San Bernardino
Clark Mountains: Coliseum Mine
Comment
RSA92061
Pleuraphis jamesii
J. C. Roos
1954-5-8
6095
Inyo
Grapevine Mountains above Leadfield
1584
Comment
CLARK-A1528-1104
Pleurocoronis pluriseta
John C. Roos
1946-10-26
3141
Riverside
Chuckwalla Mountains
487
Comment
RSA648065
Pleurocoronis pluriseta
J. C. Roos
1946-10-26
3141
Riverside
Chuckwalla Mtns.
Comment
RSA450752
Pluchea odorata
J. C. Roos
1965-10-10
s.n.
San Diego
Otay Lake
Comment
UCSB42185
Pluchea odorata
Roos, John
1965-10-10
San Diego
Otay Lake
Comment
CLARK-A1528-4980
Pluchea sericea
John C. Roos
1947-1-26
3214
Inyo
Death Valley National Park
Comment
POM263407
Poa atropurpurea
J. C. Roos
1939-5-26
714
San Bernardino
Bluff Lake, near foot of trail to Castle Rock
Comment
CLARK-A1528-7825
Poa fendleriana
John C. Roos
1937-7-28
415
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
CAS-BOT-BC246628
Poa howellii
J. C. Roos; L. Roos
1957-6-1
6613
San Bernardino
Yucaipa Ridge, 0.5 miles S.W. of Mill Creek Public Camp, Mill Creek, San Bernardino Mtns.
Comment
UCR24067
Poa howellii
John C. Roos, L. Roos
1957-6-1
6613
San Bernardino
San Bernardino Mtns., Yucaipa Ridge, 0.5 mi south of Mill Creek Public Camp, Mill Creek
Comment
UCR26338
Poa howellii
John C. Roos
1939-6-24
918
San Bernardino
San Bernardino Mtns., Sawpit Canyon, south of Cedar Springs
1159
Comment
CAS-BOT-BC247402
Poa pratensis
J. C. Roos
1965-7-18
s.n.
San Bernardino
At Moonridge in Bear Valley, San Bernardino Mountains
Comment
CLARK-A1528-4828
Poa pratensis
John C. Roos
1952-5-7
5622
Riverside
Edgemont
487
Comment
CLARK-A1528-4829
Poa pratensis
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
UCR24020
Poa pratensis
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
UCR25361
Poa pratensis
John C. Roos
1952-5-7
5622
Riverside
Flats at Edgemont
488
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
POM266337
Poa secunda
J. C. Roos
1940-5-11
847
San Bernardino
Mill Creek, San Bernardino Mts
1372
Comment
SEINET3222768
Poa secunda
John Roos, Lucille Roos
1950-4-26
4764
San Bernardino
Rabbit Springs, Mojave Desert.
880
Comment
UCR19665
Poa secunda
John C. Roos
1950-2-25
4710
Riverside
Pass between Reche Canyon and Pigeon Pass Road
457
Comment
UCR24017
Poa secunda
John C. Roos
1937-3-26
s.n.
Kern
4 mi SW of Maricopa
Comment
UCR23626
Pogogyne serpylloides
John C. Roos
1939-4-29
291
Napa
North Coast Range, Pacific Union College, Angwin
549
Comment
NY963358
Polemonium chartaceum
J. C. Roos
1951-8-10
5148
Mono
white Mountain Peak, White Mountains
4298
Comment
UCR26200
Polemonium chartaceum
John C. Roos
1960-7-4
s.n.
Mono
White Mtns, 'Crooked Creek' [but probably actually from White Mtn. Peak, and now mapped along the trail below the peak]
4345
Comment Read comments Jul 24 2016
UCR24245
Polemonium occidentale
John C. Roos
1947-6-27
3723
San Bernardino
San Bernardino Mountains, South Fork of Santa Ana River
2439
Comment
CLARK-A1528-2256
Polycarpon tetraphyllum
John C. Roos
1952-8-27
5887
San Bernardino
San Bernardino Valley
335
Comment
CLARK-A1528-5335
Polycarpon tetraphyllum
John C. Roos
1952-8-27
5887
San Bernardino
San Bernardino Valley
335
Comment
UCR23713
Polycarpon tetraphyllum
John C. Roos
1942-5-23
1061
Los Angeles
Monrovia, 300 block on E Lime St.
179
Comment
UCR23537
Polygala acanthoclada
John C. Roos
1949-6-20
4420
San Bernardino
Eastern Mojave Desert, Keystone Cannyon, near Barnwell, New York Mtns
1348
Comment Read comments Nov 6 2014
CLARK-A1528-3771
Polygonum amphibium var. emersum
John C. Roos
1937-7-27
1964
San Bernardino
San Bernardino Mountains
2042
Comment
RSA450087
Polygonum amphibium var. stipulaceum
J. C. Roos
1966-9-10
s.n.
San Bernardino
Big Bear Lake.
Comment
UCR30823
Polygonum argyrocoleon
John C. Roos
1937-6-9
2252
Imperial
Sonoran (Colorado) Desert, Westmorland, Imperial Valley
-43
Comment
UC1010233
Polygonum aviculare subsp. aviculare
John C. Roos
1953-3-31
5911
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-3777
Polygonum bistortoides
John C. Roos
1965-8-21
Fresno
Comment
CLARK-A1528-3780
Polygonum bistortoides
John C. Roos
1937-7-22
1168
San Bernardino
San Bernardino Mountains
Comment
POM263103
Polygonum kelloggii
J. C. Roos
1937-7-27
327
San Bernardino
Near Grout Bay, Bear Valley.
Comment
RSA69863
Polygonum lapathifolium
J. C. Roos, Lucille Roos
1951-9-11
5200
San Bernardino
Loma Linda.
320
Comment
RSA0051251
Polypogon monspeliensis
John C. Roos
1952-4-23
5576
Riverside
West side of Box Springs Mts. above Canyon Crest Heights.
457
Comment
RSA664198
Polypogon monspeliensis
J. C. Roos
1939-5-13
s.n.
San Bernardino
La Sierra.
Comment
CLARK-A1528-4842
Polypogon semiverticillatus
John C. Roos
1942-9-12
1718
Los Angeles
Westwood
Comment
UCSB51282
Polypogon viridis
Roos, John
1965-6-12
San Bernardino
Igo's near Mountain Home Village and Mill Creek; San Bernardino Mtns.
Comment
CAS-BOT-BC102750
Populus tremuloides
John Roos; Lucille Roos
1952-7-30
5872
Mono
Crooked Creek, White Mts.
3078
Comment
LA102304
Populus tremuloides
J. C. Roos;
1965-6-26
sn
San Bernardino
San Bernardino Mountains, Fish Creek, near Barton Flats
Comment
CLARK-A1528-4064
Populus trichocarpa
John C. Roos
1946-9-28
3095
San Bernardino
San Bernardino Mountains
2255
Comment
CLARK-A1528-4063
Populus trichocarpa var. ingrata
John C. Roos
1936-8-15
563
San Bernardino
San Bernardino Mountains
1981
Comment
UCR19541
Porophyllum gracile
John C. Roos
1950-5-6
4789
Riverside
Santa Ana Mtns., Tin Mine Canyon
488
Comment
UCR26321
Potamogeton pusillus
John C. Roos
1937-7-28
16
San Bernardino
San Bernardino Mtns, Holcomb Valley
2256
Comment
UCR23514
Potentilla biennis
John C. Roos
1937-8-5
1025
Inyo
White Mtns., White Mtns.
Comment
LA102307
Potentilla gracilis
J. C. Roos;
1937-7-26
338
San Bernardino
San Bernardino Mountains, Bear Valley, Pine Knot ( now city of Big Bear )
Comment
CLARK-A1528-4018
Potentilla gracilis subsp. nuttallii
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
RSA450249
Potentilla gracilis var. elmeri
J. C. Roos
1965-7-18
s.n.
San Bernardino
Moonridge, Bear Valley, San Bernardino Mountains.
Comment
CLARK-A1528-4019
Potentilla propinqua
John C. Roos, Lucille Roos
1952-7-30
5875
Mono
White Mountains
3078
Comment
CLARK-A1528-4022
Potentilla saxosa
John C. Roos
1942-5-1
1151
San Bernardino
Joshua Tree National Monument
Comment
UCR19201
Primula suffrutescens
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mountains, Heart Lake, Independence Creek area
3300
Comment
UCR23652
Proboscidea parviflora var. hohokamiana
John C. Roos, E. C. Jaeger
1955-7-23
6516
Inyo
Northern Mojave Desert, Saline Valley, below mouth of Hunter Canyon
351
Comment
CLARK-A1528-2867
Prosopis chilensis var. glandulosa
John C. Roos
1952-7-16
5814
Riverside
San Timoteo Canyon
441
Comment
CLARK-A1528-2871
Prosopis pubescens
John C. Roos
1947-4-20
3504
Inyo
Death Valley
Comment
UCSB42201
Prosopis pubescens
Roos, John
1965-7-11
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
CAS-BOT-BC159760
Prunus andersonii
J. C. Roos
1955-6-20
6457
Inyo
Near Willow Spring, Last Chance Mountains
1828
Comment
UCSB37382
Prunus emarginata
Roos, John
1965-7-18
San Bernardino
Snow Valley, San Bernardino Mtns
Comment
RSA47538
Prunus fasciculata
J. C. Roos, L. Roos
1949-6-18
4391
San Bernardino
Southeastern base of Clark Mountain, eastern Mojave Desert.
1829
Comment
CLARK-A1528-4033
Prunus fremontii
John C. Roos
1937-4-18
San Diego
Jacumba
Comment
CLARK-A1528-4034
Prunus ilicifolia
John C. Roos
1940-5-4
Riverside
San Timoteo Canyon
Comment
UCR26088
Psathyrotes annua
John C. Roos
1949-6-26
4498
San Bernardino
Eastern Mojave Desert, 2 mi south of Kingston
793
Comment
RSA47448
Pseudostellaria jamesiana
J. C. Roos, L. Roos
1949-7-16
4552
San Bernardino
Moonridge, Bear Valley
2226
Comment
CLARK-A1528-2070
Psilostrophe cooperi
John C. Roos
1937-8-25
2024
San Bernardino
East Mojave Desert
Comment
CLARK-A1528-5672
Psoralea physodes
John C. Roos
1960-5-30
Riverside
Santa Ana Mountains
1219
Comment
CLARK-A1528-5067
Psoralea rigida
John C. Roos
1943-7-4
2725
San Bernardino
San Bernardino Mountains
Comment
UCR25914
Psoralea rigida
John C. Roos
1949-7-16
4546
San Bernardino
San Bernardino Mtns., near Greenspot, Bear Valley
2134
Comment
UC1236254
Psorothamnus arborescens var. minutifolius
John C. Roos
1955-5-13
6332
Inyo
west base Last Chance Mountains, E of Eureka Valley sand dunes
1158
Comment
UCR23938
Psorothamnus fremontii
John C. Roos
1955-5-13
6332
Inyo
Northern Mojave Desert, west base of Last Chance Mountains, east of Eureka Valley sand dunes
1280
Comment
RSA92339
Psorothamnus polydenius
J. C. Roos, L. Roos
1954-6-28
6178
Inyo
North base of sand dunes at SE end of Eureka Valley
915
Comment
UCSB42194
Psorothamnus schottii
Roos, John
1966-5-2
Riverside
At the mouth of Pushawalla Canyon, Indio Mtns.
Comment
UCR19292
Puccinellia nuttalliana
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Big Bear Valley along the lake
2058
Comment
LA102371
Pulicaria paludosa
John C. Roos;
1965-6-23
Riverside
Palm Springs
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
CAS-BOT-BC143786
Purshia stansburyana
John C. Roos
1955-5-13
6342
Inyo
West base Last Chance Mts. east of Eureka Valley sand dunes
1219
Comment
UCR18932
Purshia stansburyana
John C. Roos
1965-7-11
s.n.
Inyo
Northern Mojave Desert, Panamint Mtns, Mahogany Flats
2470
Comment
UC1010198
Pyrrocoma apargioides
John and Lucille Roos
1951-8-11
5169
Mono
Campito Meadow White Mts.
3322
Comment
CLARK-A1528-2904
Quercus X morehus
John C. Roos
1947-4-26
3598
San Bernardino
San Bernardino Mountains
Comment
UCR18973
Quercus X morehus
John C. Roos
1946-9-1
2980
San Bernardino
San Bernardino Mtns, Oak Glen
Comment
RSA35731
Quercus X morehus
J. C. Roos
1946-11-6
5394
San Bernardino
Oak Glen, San Bernardino Mts.
1220
Comment
CLARK-A1528-1176
Quercus agrifolia
John C. Roos
1946-9-1
2984
San Bernardino
Wildwood Canyon
Comment
RSA450193
Quercus agrifolia
A. R. Roos
1937-12-15
s.n.
Los Angeles
Sepulveda Canyon
Comment
UCR23863
Quercus agrifolia
Alfred R. Roos
1937-12-15
s.n.
Los Angeles
Western Transverse Range; Santa Monica Mtns., Sepulveda Canyon
350
Comment
SEINET13953046
Quercus agrifolia
J. C. Roos
1965-1
San Bernardino
Hills near summit of Pine to Palms Highway, San Jacinto and Santa Rosa Mountains
Comment
CLARK-A1528-5327
Quercus chrysolepis
John C. Roos
1949-6-22
4455
San Bernardino
New York Mountains
elevations 1737-2256
Comment
POM266352
Quercus garryana var. breweri
J. C. Roos
1939-7-6
1516
Shasta
Hills north of Redding.
1372
Comment
UCR18945
Quercus lobata
John C. Roos
1946-11-23
3157
Los Angeles
Transverse Range, Placerita Canyon [in Santa Clarita]
Comment
CLARK-A1528-2903
Quercus lobata
John C. Roos
1937-7-3
1929
Santa Barbara
Lower Cuyama Valley
Comment
SEINET13953263
Quercus palmeri
J. C. Roos
1965-1
Riverside
Summit of Pines to Palms Road (Hwy 74) south of Palm Desert, Santa Rosa and San Jacinto Mountains.
Comment
LA102298
Quercus turbinella
John C. Roos;
1949-8-13
4621
San Bernardino
New York Mountains, Keystone Canyon, near Copper Queen Mine
1828
Comment
UC1010217
Quercus turbinella
John and Lucille Roos
1949-6-21
4430
San Bernardino
Keystone Canyon New York Mts.
1767
Comment
RSA47311
Quercus turbinella subsp. turbinella
J. C. Roos
1949-6-22
4452
San Bernardino
New York Mountains; Keystone Canyon
1738
Comment
UCR23860
Quercus wislizeni
John C. Roos
1965-8-21
s.n.
Tulare
Sierra Nevada Mtns., Middle Fork of Kaweah River Canyon, west of Sequoia National Forest
Comment
CLARK-A1528-2912
Quercus wislizeni
John C. Roos
1965-8-21
Tulare
Kaweah River
Comment
POM262922
Quercus wislizeni var. frutescens
J. C. Roos
1937-8-11
481
Kern
Tehachapi Pass
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
UCR26099
Rafinesquia neomexicana
John C. Roos
1948-4-24
3802
Riverside
Eastern San Bernardino Mtns./Sonoran (Colorado) Desert, Whitewater Wash
549
Comment
POM261196
Raillardella argentea
J. C. Roos
1941-8-27
34
San Bernardino
San Gorgonio Ridge, San Bernardino Mountains
3476
Comment
UCR18908
Ranunculus aquatilis
John C. Roos
1937-7-28
s.n.
San Bernardino
San Bernardino Mtns, Holcomb Valley
2043
Comment
POM265651
Reseda odorata
J. C. Roos
1937-8-31
2563
San Diego
Oceanside
Comment
CLARK-A1528-3908
Rhamnus californica subsp. cuspidata
John C. Roos
1949-6-19
4405
San Bernardino
Clark Mountain Range
1950
Comment
UCR23453
Rhamnus ilicifolia
John C. Roos, Lucille Roos
1949-4-23
4284
Riverside
Sonoran (Colorado) Desert, Eagle Mtns., Munsen Canyon
Comment
CLARK-A1528-3909
Rhamnus pilosa
John C. Roos
1937-6-14
531
San Diego
Alpine
Comment
RSA47204
Rhamnus tomentella subsp. ursina
J. C. Roos, L. Roos
1949-6-19
4405
San Bernardino
southeastern base of Clark Mts, eastern San Bernardino Co.
1951
Comment
CLARK-A1528-1413
Rhus integrifolia
John C. Roos
1949-10-22
4693
San Bernardino
Santa Ana River
396
Comment
CLARK-A1528-5595
Rhus integrifolia
John C. Roos
1950-2-18
4707
Riverside
Box Springs Mountains
774
Comment
CLARK-A1528-1414
Rhus laurina
John C. Roos
1954-7-10
6191
Riverside
Box Springs Mountains
487
Comment
CLARK-A1528-2406
Rhus trilobata
John C. Roos
1948-5-15
3831
Riverside
Eagle Mountains
Comment
CLARK-A1528-4125
Ribes cereum
John C. Roos
1941-8-17
26
Inyo
Panamint Mountains
Comment
CLARK-A1528-6881
Ribes indecorum
John C. Roos
1946-12-27
3194
Riverside
Box Springs Mountains
Comment
RSA664942
Ribes indecorum
J. C. Roos
1946-12-27
3194
San Bernardino
Reche Canyon.
Comment
CLARK-A1528-4137
Ribes montigenum
John C. Roos
1942-7-1
1251
Mariposa
Yosemite
Comment
POM302497
Ribes montigenum
J. C. Roos
1943-7-4
2715
San Bernardino
Sugarloaf Peak, San Bernardino mts.
2896
Comment
POM265675
Ribes quercetorum
J. C. Roos
1937-6-8
1649
San Diego
Mouth of Canyon above Warner Hot Springs.
Comment
CLARK-A1528-4151
Ribes speciosum
John C. Roos
1962-5-6
Orange
Santa Ana Mountains
Comment
POM261194
Ribes velutinum
J. C. Roos
1941-8-17
60
Inyo
Trail to Telescope Peak, Panamint Mts.
2652
Comment
UCR19140
Ribes velutinum
John C. Roos, L. Roos
1954-6-26
6164
Inyo
Northern Mojave Desert, Inyo Mtns, Mazourka Canyon
2439
Comment
UCR19224
Ribes velutinum
John C. Roos
1949-6-27
4503
San Bernardino
Eastern Mojave Desert, Kingston Mountains
1982
Comment
CLARK-A1528-4157
Ribes viburnifolium
John C. Roos
1966-2-26
Los Angeles
Claremont
Comment
CLARK-A1528-2711
Ricinus communis
John C. Roos
1937-9-5
2554
San Bernardino
Loma Linda
Comment
UCR23436
Rorippa sphaerocarpa
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, Bear Valley
Comment
CAS-BOT-BC422177
Rumex californicus
J. C. Roos
1965-7-17
s.n.
San Bernardino
Dry Lake, San Bernardino Mtns.
Comment
CLARK-A1528-3798
Rumex fueginus
John C. Roos
1937-6-17
1232
San Diego
San Luis Rey
Comment
CLARK-A1528-3799
Rumex hymenosepalus
John C. Roos
1966-4-29
Riverside
Lakeview
457
Comment
POM265698
Rumex salicifolius var. crassus
J. C. Roos
1942-9-12
1743
Los Angeles
Northwest of Santa Monica.
Comment
RSA450154
Rumex salicifolius var. denticulatus
J. C. Roos
1965-7-17
s.n.
San Bernardino
Dry Lake, San Bernardino Mtns.
Comment
CLARK-A1528-1001B
Rumex triangulivalvis
John C. Roos
1937-7-29
1982
San Bernardino
Bluff Lake
2316
Comment
CLARK-A1528-5727
Ruta graveolens
John C. Roos
1948-2-21
3771
Riverside
Reche Canyon
457
Comment
RSA450476
Salazaria mexicana
J. C. Roos
1965-6-13
s.n.
Riverside
Santa Rosa Mountains: Dos Palmas Springs.
Comment
CLARK-A1528-4053
Salix exigua
John C. Roos
1937-4-26
618
San Bernardino
Providence Mountains
Comment
UCR26182
Salix exigua
John C. Roos
1947-2-15
3244
Riverside
Sonoran (Colorado) Desert, Lost Palms Canyon, south face of Eagle Mtns., west of Hayfield Dry Lake
997
Comment
UCR30597
Salix gooddingii
John C. Roos, A. R. Roos
1950-8-7
s.n.
Inyo
Northern Mojave Desert, China Ranch near Tecopa Pass
427
Comment
CLARK-A1528-4054
Salix hindsiana var. leucodendroides
John C. Roos
1937-5-23
617
Riverside
Riverside
Comment
RSA85092
Salix lasiolepis
J. C. Roos
1952-4-4
5469
San Bernardino
Warm Creek bottomland at Colton.
290
Comment Read comments Dec 3 2014
UCR23756
Salpichroa origanifolia
John C. Roos
1965-6-29
s.n.
San Bernardino
San Bernardino Valley, Bloomington
354
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-A1528-3108
Salvia clevelandii
John C. Roos, Lucille Roos
1950-8-19
4943
San Diego
Torrey Pines Park
Comment
CLARK-A1528-3109
Salvia dorrii
John C. Roos
1947-2-22
3288
San Bernardino
San Bernardino Mountains
Comment
CAS-BOT-BC220787
Salvia dorrii var. dorrii
J. C. Roos
1955-7-21
6488
Inyo
Whitetop Peak, summit Last Chance Mountains
2560
Comment
LA69886
Salvia dorrii var. pilosa
John C. Roos; Lucille Roos
1952-7-30
5859
Inyo
White Mountains, E side Reed Flat
3078
Comment
RSA85131
Salvia funerea
J. C. Roos
1954-3-27
6057
Inyo
Titus Canyon below Klare Spring, Grapevine Mts. Death Valley.
915
Comment
CLARK-A1528-3116
Salvia greatae
John C. Roos
1963-11-2
Riverside
Orocopia Mountains
Comment
RSA171386
Salvia greatae
J. C. Roos
1963-9-9
s.n.
Riverside
Desert wash at Salt Creek Wash.
152
Comment
UCR23625
Salvia leucophylla
John C. Roos
1940-5-25
1901
San Bernardino
San Bernardino Valley, at mouth of Santa Ana River, above Highland
Comment
CLARK-A1528-3123
Salvia mohavensis
John C. Roos
1947-2-15
3234
Riverside
Eagle Mountain
Comment
CLARK-A1528-3124
Salvia mohavensis
John C. Roos
1949-6-25
4495
San Bernardino
Clark Mountains
1645
Comment
CLARK-A1528-4961
Salvia mohavensis
John C. Roos
1949-6-24
4476
San Bernardino
Clark Mountain
1676
Comment
UCR25754
Salvia mohavensis
John C. Roos
1946-11-2
3156
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
UCR26240
Salvia pachyphylla
John C. Roos
1946-8-27
2914
Riverside
Peninsular Range, Santa Rosa Mtns
2287
Comment
UCR26299
Salvia pachyphylla
John C. Roos
1949-6-19
4406
San Bernardino
Eastern Mojave Desert, SE foot of Clark Mountain
1951
Comment
UCR18778
Salvia vaseyi
John C. Roos
1948-5-8
3825
Riverside
San Bernardino Mtns, Whitewater
579
Comment
CLARK-A1528-2413
Sambucus microbotrys
John C. Roos
1965-8-9
Inyo
Sierra Nevada Range
Comment
UCR19084
Sambucus racemosa
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mountains, moraine at Gilbert Lake, near Kearsarge Pass
3178
Comment
CAS-BOT-BC328143
Sanvitalia abertii
J. C. Roos; A. R. Roos
1950-8-5
4893
San Bernardino
1 mile south of Coliseum Mine, Clark Mountains, eastern Mohave Desert
1645
Comment
CAS-BOT-BC328144
Sanvitalia abertii
John Roos
1950-9-1
4954
San Bernardino
Near Coliseum Mine, Clark Mountains, eastern Mohave Desert
1645
Comment
RSA52783
Sanvitalia abertii
J. C. Roos
1950-8-5
4893
San Bernardino
1 mi S of Coliseum Mine, Clark Mtns.
1646
Comment
UCR28722
Saponaria officinalis
John C. Roos
1948-9-2
4019
Siskiyou
Hills just north of Shasta City.
Comment
UCSB42183
Sarcodes sanguinea
Roos, John
1966-6-15
Los Angeles
N slope of Mount Baden-Powell near Laurel Spring, San Gabriel Mtns.
2377
Comment
CLARK-A1528-1468
Sarcostemma cynanchoides
John C. Roos
1940-8-20
906
Riverside
Reche Canyon
Comment
CLARK-A1528-1469
Sarcostemma hirtellum
John C. Roos
1937-4-18
Riverside
Colorado Desert
Comment Read comments Mar 3 2014
RSA648742
Schedonorus pratensis
J. C. Roos
1950-5-20
4815
San Bernardino
Central St., San Bernardino Valley.
304
Comment
UCSB51363
Schismus barbatus
Roos, John
1965-6-6
San Bernardino
Mill Creek near Fallsvale, San Bernardino Mtns.
Comment
UCR20373
Schoenoplectus americanus
John C. Roos, L. Roos
1952-6-10
5762
Riverside
San Bernardino Valley Region, Fairmont Park in Riverside, edge of lake
259
Comment
UCR18886
Scopulophila rixfordii
John C. Roos, L. Roos
1954-5-8
6097
Inyo
Northern Mojave Desert, Grapevine Mountains, Titus Canyon, below Leadfield
1372
Comment
CLARK-A1528-2458
Scopulophila rixfordii
John C. Roos, Lucille Roos
1954-5-8
6097
Inyo
Grapevine Mountains
1371
Comment
CLARK-A1528-2459
Scopulophila rixfordii
John C. Roos
1955-4-8
6313
Inyo
Last Chance Range
1219
Comment
RSA96598
Scopulophila rixfordii
J. C. Roos
1954-9-19
20181
Inyo
Gorge where Loretto Rd. pulls out of Canyon, N Inyo Mts.
1616
Comment
RSA40585
Scrophularia californica var. desertorum
J. C. Roos
1947-7-13
2892
Inyo
East slope Baldy Peak, Panamint Mts.
Comment
RSA79499
Scrophularia californica var. desertorum
J. C. Roos, A. R. Roos
1953-8-14
6026
Inyo
Al Rose Canyon, Inyo Mts.
2500
Comment
RSA592489
Sedum niveum
J. C. Roos
1965-7-31
s.n.
San Bernardino
South fork.
2134
Comment
CLARK-A1528-4074
Selaginella asprella
John C. Roos
1937-5-9
2090
San Bernardino
Oak Glen
Comment
CLARK-A1528-4079
Selaginella watsonii
John C. Roos
1937-7-22
1165
San Bernardino
Mount San Gorgonio
Comment
UCR23324
Senecio astephanus
John C. Roos, L. Roos
1952-6-14
5771
San Bernardino
San Bernardino Mtns., Mill Creek south of Mill Creek Public Camp
1159
Comment
UCR34453
Senecio canus
John C. Roos, L. Roos
1954-6-24
6147
Inyo
Inyo Mtns., 1 mi east of Blue Bell Mine
2866
Comment
CLARK-A1528-2081
Senecio douglasii
John C. Roos
1965-7-21
San Bernardino
Cajon Pass
Comment
CLARK-A1528-2087
Senecio mohavensis
John C. Roos
1949-4-10
4223
Riverside
Chuckwalla Mountains
Comment
UCR34450
Senecio scorzonella
John C. Roos
1948-9-7
4009
Tuolumne
Sierra Nevada Mtns, Yosemite National Park, NE of Tuolumne Meadows
2744
Comment
RSA0013675
Senecio spartioides
J. C. Roos, P. Roos
1966-9-13
s.n.
San Bernardino
Ridge between headwaters of Fish Creek and North Fork meadows.
Comment
CLARK-A1528-2092
Senecio triangularis
John C. Roos
1946-9-4
2941
San Bernardino
High Creek
2804
Comment
UCR25861
Senna armata
John C. Roos
1937-4-23
779
San Bernardino
Southern Mojave Desert, Twentynine Palms
762
Comment
UCR23416
Sesuvium verrucosum
John C. Roos
1955-7-24
6524
Inyo
Owens Valley/Eastern Sierra Nevada, south end Owens Lake, 0.5 mi. east of Olancha
1100
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
UCR31319
Setaria parviflora
John C. Roos
1951-9-23
5240
San Bernardino
San Bernardino Valley, 2 miles west of Loma Linda
305
Comment
UCR31318
Setaria pumila
John C. Roos
1951-9-23
5239
San Bernardino
San Bernardino Valley, 2 miles west of Loma Linda
305
Comment
CLARK-A1528-5536
Setaria verticillata
John C. Roos
1965-8-5
San Bernardino
Loma Linda
Comment
RSA89904
Setaria verticillata
J. C. Roos
1952-5-14
5660
Riverside
Scattered locally along edge of irrigated orchard with Echinochloa, Crusgalli, etc., corner of Iowa and 8th Street east of Riverside.
305
Comment
UCD92866
Setaria viridis
J. C. Roos
1937-7-12
1503
San Bernardino
Loma Linda.
Comment
LA102261
Sidalcea neomexicana
John C. Roos;
1950-5-13
4805
San Bernardino
Lucerne Valley, Rabbit Springs
883
Comment
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
CLARK-A1528-2468
Silene lemmonii
John C. Roos
1941-6-1
93
San Bernardino
San Bernardino Mountains
Comment Read comments Feb 20 2015
CLARK-A1528-2469
Silene parishii
John C. Roos
1966-8-6
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4895
Silene verecunda subsp. platyota
John C. Roos
1941-8-17
59
Inyo
Panamint Mountains
2590
Comment
CLARK-A1528-5642
Sisymbrium murale
John C. Roos
1943-4-11
2603
San Bernardino
San Bernardino County Hospital
Comment
RSA69822
Solanum americanum
J. C. Roos, L. Roos
1951-9-29
5308
San Bernardino
Warm Creek near south E street, San Bernardino.
305
Comment
CLARK-A1528-892
Solanum douglasii
John C. Roos
1951-9-25
5296
Riverside
Riverside
259
Comment
UCR19143
Solanum elaeagnifolium
John C. Roos
1952-6-5
5737
San Bernardino
San Bernardino Valley, Loma Linda
457
Comment
UCR19241
Solanum elaeagnifolium
John C. Roos
1965-7-29
s.n.
Riverside
San Gorgonio Pass, Banning, along RR track
Comment
CLARK-A1528-5186
Solanum nigrum
John C. Roos
1937-11-25
493
San Bernardino
Patton
Comment
RSA44908
Solanum rostratum
J. C. Roos
1947-9-3
3742
San Bernardino
San Bernardino Valley along the Gage Canal in Loma Linda
305
Comment
CLARK-A1528-4372
Solanum sarrachoides
John C. Roos, Lucille Roos
1953-6-29
5925
Riverside
Cherry Valley
975
Comment
CLARK-A1528-5025
Solanum triflorum
John C. Roos
1937-6-7
1453
San Diego
Aquanea
Comment
CLARK-A1528-1208
Solanum xanti var. montanum
John C. Roos
1937-7-27
1969
San Bernardino
San Bernardino Mountains
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
CAS-BOT-BC365330
Solidago confinis
J. C. Roos
1946-9-21
3043
San Bernardino
Lucerne Valley in the southern Mojave Desert. Box S Spring
1082
Comment
CLARK-A1528-1060
Solidago confinis
John C. Roos
1937-7-27
1971
San Bernardino
San Bernardino Mountains
Comment
RSA71390
Solidago multiradiata
J. C. Roos, Lucille Roos
1951-8-10
5162
Mono
Northeast face of Sheep Mountain, White Mountains.
3506
Comment
UCR24169
Solidago occidentalis
John C. Roos
1946-10-2
s.n.
San Bernardino
San Bernardino Valley, south of San Bernardino
305
Comment
CLARK-A1528-2103
Soliva sessilis
John C. Roos
1953-5-9
5916
Riverside
Riverside
259
Comment
UCR19714
Soliva sessilis
John C. Roos, L. Roos
1953-5-9
5916
Riverside
Riverside, Fairmont Park
259
Comment
UCR26160
Sonchus oleraceus
John C. Roos
1949-10-1
4686
Orange
South Coast, Doheny Beach
0
Comment
CLARK-A1528-5278
Sorghum halepense
Alfred R. Roos
1941-6-15
San Diego
San Diego
Comment
CLARK-A1528-94
Sorghum halepense
John C. Roos
1951-10-2
5313
San Bernardino
Loma Linda
320
Comment
CLARK-A1528-5254
Sorghum sudanense
Alfred R. Roos
1936-11-11
Riverside
Riverside
243
Comment
UCR24107
Sparganium eurycarpum
John C. Roos
1943-4-27
2628
San Bernardino
San Bernardino Valley, swamp south of San Bernardino
305
Comment
CLARK-A1528-5031
Spartina foliosa
John C. Roos
1937-9-1
427
Orange
Seal Beach
Comment
UCSB42171
Spergularia bocconi
Roos, John
1966-3-13
Riverside
On roadside, Winchester
Comment
CLARK-A1528-2478
Spergularia macrotheca
John C. Roos
1937-3-27
643
Santa Barbara
Gaviota Beach
Comment
CLARK-A1528-2479
Spergularia marina
John C. Roos
1947-5-10
3623
San Bernardino
Loma Linda
Comment
RSA0098490
Spergularia marina
J. C. Roos
1947-3-15
3349
Riverside
Mouth of Deep canyon. Santa Rosa Mtns.
Comment
RSA0098130
Spergularia rubra var. perennans
J. C. Roos
1939-5-13
268
Napa
Near Angwin.
Comment
CLARK-A1528-3246
Sphaeralcea ambigua subsp. monticola
John C. Roos
1937-4-27
1657
San Bernardino
Goffs
Comment
RSA40576
Sphaeromeria cana
J. C. Roos
1947-7-13
2877
Inyo
Summit of Telescope Peak
3363
Comment
CLARK-A1528-1459
Sphenosciadium capitellatum
John C. Roos
1937-7-22
1680
San Bernardino
San Bernardino Mountains
Comment
UCR18923
Spiraea densiflora
John C. Roos
1948-7-9
4002
Mono
Sierra Nevada Mtns., Ellery Lake at Tioga Pass
2744
Comment
CLARK-A1528-5037
Sporobolus airoides
John C. Roos
1946-9-21
3077
San Bernardino
San Bernardino Mountains
1081
Comment
CAS-BOT-BC235448
Sporobolus cryptandrus
J. C. Roos
1965-6-7
s.n.
San Bernardino
Victorville
Comment
CAS-BOT-BC235449
Sporobolus cryptandrus
John C. Roos
1950-9-1
4948
San Bernardino
Valley Wells Station, Mojave Desert
1127
Comment
CLARK-A1528-5051
Sporobolus cryptandrus
John C. Roos
1949-8-13
4619
San Bernardino
New York Mountains
1828
Comment
RSA155684
Sporobolus cryptandrus
J. C. Roos
1955-6-20
6458
Inyo
Last Chance Mountains 2 miles NE of Willow Spring.
Comment
RSA263053
Sporobolus cryptandrus
A. R. Roos
1936-9-2
10380
San Bernardino
Jct of Clark's Grade road and Santa Ana Canyon road, Seven Oaks
Comment
RSA450654
Sporobolus cryptandrus
J. C. Roos
1965-8-15
s.n.
Riverside
Gilman Hot Springs, San Jacinto Valley.
Comment
RSA85277
Sporobolus cryptandrus
J. C. Roos
1950-8-12
4932
San Bernardino
Mill Creek near jct of Vivian Creek
1829
Comment
UC1117447
Sporobolus cryptandrus
J. C. and A. R. Roos
1955-8-26
6560
Inyo
e. base Waucoba Mt. (Soldier Flat); Inyo Mts., , Soldier Flat
2164
Comment
UCR24377
Sporobolus cryptandrus
John C. Roos
1965-8-15
s.n.
Riverside
Gilman Hot Springs
610
Comment
CLARK-A1528-5542
Sporobolus flexuosus
John C. Roos
1946-9-14
3021
Riverside
Asbestos Mountain
1066
Comment
RSA52773
Sporobolus flexuosus
J. C. Roos
1950-9-1
4949
San Bernardino
Valley Wells, eastern Mojave Desert.
1128
Comment
CAS-BOT-BC235463
Sporobolus indicus
John Roos; Lucille Roos
1951-9-25
5277
Riverside
Fairmont Park, Riverside
259
Comment
CLARK-A1528-3132
Stachys albens
John C. Roos
1937-7-10
1791
San Bernardino
Reche Canyon
Comment
UC1010490
Stanleya pinnata
John and Lucille Roos
1954-6-28
6177
Inyo
s and e end Eureka Valley; south and east end Eureka Valley
914
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
UC1236260
Stanleya pinnata
John C. Roos
1955-5-13
6353
Inyo
se end Eureka Valley; se end Eureka Valley
914
Comment
RSA105014
Stanleya pinnata
J. C. Roos
1955-5-16
6391
Inyo
Waucoba road, 6 miles east of Big Pine, west side Inyo Mtns.
1494
Comment
RSA155696
Stanleya pinnata
J. C. Roos
1955-6-21
6466
Inyo
Willow Creek, W side Last Chance Mtns
1585
Comment
CLARK-A1528-2341
Stanleya pinnata subsp. inyoensis
John C. Roos
1954-8-13
6209
Inyo
Eureka Valley
914
Comment
UCR23435
Stanleya pinnata var. inyoensis
John C. Roos
1955-5-13
6353
Inyo
Northern Mojave Desert, SE end of Eureka Valley
945
Comment
CLARK-A1528-2482
Stellaria longipes
John C. Roos
1937-7-21
379
San Bernardino
San Bernardino Mountains
Comment
UCR27548
Stellaria longipes var. longipes
John C. Roos
1960-7-4
s.n.
Mono
White Mtns, Crooked Creek
3293
Comment
UCR25795
Stellaria nitens
John C. Roos
1952-4-16
5549
Riverside
Damp canyon off Reche Canyon.
518
Comment
UCR25796
Stellaria nitens
John C. Roos
1952-4-13
5531
Riverside
N slope, on north side of Box Springs Mtns
396
Comment
CLARK-A1528-95
Stenotaphrum secundatum
John C. Roos, Lucille Roos
1951-9-22
5234
Riverside
Riverside
Comment
RSA157865
Stenotus acaulis
J. C. Roos
1955-6-19
6445
Inyo
Summit ridge Last Chance Mtns., 2 miles W of Last Chance Spring.
2530
Comment
CLARK-A1528-2104
Stephanomeria cichoriacea
John C. Roos
1943-7-27
2689
San Bernardino
San Bernardino Mountains
Comment
UCR24171
Stephanomeria exigua
John C. Roos
1965-7-18
s.n.
San Bernardino
San Bernardino Mtns, east end of Bear Valley
Comment
UC1234813
Stephanomeria exigua subsp. coronaria
J. C. Roos and E. C. Jaeger
1955-7-21
6477
Inyo
2 mi ne Willow Spring; Last Chance Mountains
2011
Comment
UCR26163
Stephanomeria pauciflora
John C. Roos
1947-4-18
3451
San Bernardino
Central Mojave Desert, Cronese Dry Lake
Comment
SEINET880825
Stillingia spinulosa
J. C. Roos
1965-1
s.n.
Riverside
Dillon Road in Desert Hot Springs.
305
Comment
UCR18829
Stillingia spinulosa
John C. Roos
1965-8-14
s.n.
Riverside
Sonoran (Colorado) Desert, Dillon Road in Desert Hot Springs.
Comment
UCR25114
Stipa X bloomeri
John C. Roos, L. Roos
1951-7-28
5067
San Bernardino
San Bernardino Mtns, Head of Rathbone Creek
Comment
UCR24293
Stipa cernua
John C. Roos
1945-3-14
s.n.
Los Angeles
Los Angeles, Olympic Blvd., west of Fox Studios
Comment
CLARK-A1528-5273
Stipa comata
John C. Roos, Lucille Roos
1951-8-8
5088
Inyo
White Mountains
2590
Comment
CLARK-A1528-5310
Stipa comata
John C. Roos
1965-7-18
San Bernardino
San Bernardino Mountains
Comment
SD53012
Stipa comata
John C. Roos
1955-6-19
6453
Inyo
Willow Spring, Last Chance Mountains
1829
Comment
CLARK-A1528-5297
Stipa coronata
John C. Roos
1940-8-17
1606
San Bernardino
San Bernardino Mountains
Comment
UCR23301
Stipa lepida
John C. Roos, L. Roos
1952-5-19
5691
Riverside
North of Moreno
518
Comment Read comments May 20 2011
UCR25375
Stipa lepida
John C. Roos
1939-5-27
s.n.
Riverside
Reche Canyon
Comment
CLARK-A1528-5253
Stipa lettermanii
John C. Roos
1946-8-25
2929
San Bernardino
San Bernardino Mountains
2377
Comment
CLARK-A1528-5264
Stipa lettermanii
John C. Roos
1946-9-15
3030
San Bernardino
San Bernardino Mountains
2316
Comment
UCR20452
Stipa lettermanii
John C. Roos, L. Roos
1950-6-24
4842
San Bernardino
San Bernardino Mtns, Moonridge, Bear Valley
2226
Comment
UCR30541
Stipa lettermanii
John C. Roos
1950-7-29
4883
San Bernardino
San Bernardino Mtns, Mill Creek at junction with Vivian Creek
1890
Comment
CLARK-A1528-5263
Stipa occidentalis
John C. Roos
1946-9-15
3032
San Bernardino
San Bernardino Mountains
2956
Comment
CLARK-A1528-5286
Stipa pinetorum
John C. Roos, Alfred R. Roos
1954-6-12
6136
Inyo
Panamint Range
243
Comment
CLARK-A1528-5552
Stipa speciosa
John C. Roos
1937-7-14
Riverside
Reche Canyon
Comment
CLARK-A1528-5274
Stipa thurberiana
John C. Roos, Lucille Roos
1951-8-8
5087
Inyo
White Mountains
2590
Comment
CLARK-A1528-4852
Streptanthella longirostris
John C. Roos
1937-4-18
1372
Riverside
Snow Creek
Comment
POM302500
Streptanthus bernardinus
J. C. Roos
1943-7-31
2692
San Bernardino
Kuffle Canyon, near Lake Arrowhead. San Bernardino Mountains.
1677
Comment
SD53017
Streptanthus cordatus
J. C. Roos
1955-6-17
6399
Inyo
2.0 miles northeast of Willow Spring, Last Chance Mountains.
2010
Comment Read comments Nov 4 2011
RSA40552
Streptanthus cordatus
J. C. Roos
1947-7-11
2841
Inyo
Mahogany Flats, Panamint mtns.
2500
Comment
CLARK-A1528-2112
Stylocline filaginea
John C. Roos
1954-5-11
6118
Riverside
Reche Canyon
609
Comment
CLARK-A1528-4086
Styrax officinalis
John C. Roos
1966-4-23
Riverside
Santa Ana Mountains
Comment
CLARK-A1528-1010
Styrax officinalis subsp. fulvescens
John C. Roos
1941-5-13
134
San Bernardino
San Bernardino Mountains
761
Comment
RSA444666
Styrax redivivus
J. C. Roos
1966-4-23
s.n.
Riverside
S of Corona. Assoc. with Quercus dumosa and Rhamnus ilicifolia.
Comment
UCSB37352
Styrax redivivus
Roos, John
1966-4-23
Riverside
Santa Ana Mtns. S. of Corona
Comment
UC1043002
Suaeda calceoliformis
John and Lucille Roos
1954-9-14
6236
Inyo
2.7 mi ne Death Valley Junction (along Ash Meadows road); Amargosa Desert
624
Comment
UC1080631
Suaeda calceoliformis
John and Lucille Roos
1954-9-14
6236
Inyo
2.7 mi ne Death Valley Junction (on Ash Meadows Road)
624
Comment
CLARK-A1528-5423
Suaeda depressa var. erecta
John C. Roos
1954-7-18
6193
Inyo
Amargosa Desert
624
Comment
CLARK-A1528-2602
Suaeda fruticosa
Alfred R. Roos
1947-7-22
San Bernardino
Loma Linda
304
Comment
RSA509436
Suaeda moquinii
A. R. Roos
1950-8-7
s.n.
Inyo
Tecopa Hot Springs, ca. 2 mi. N of Tecopa.
427
Comment
UCR24214
Suaeda moquinii
John C. Roos
1946-9-20
3056
San Bernardino
Southern Mojave Desert, alkalai flat near Lucerne Valley
Comment
CLARK-A1528-1195
Suaeda torreyana
John C. Roos
1940-8-22
245
San Bernardino
Loma Linda
Comment
GH341022
Swallenia alexandrae
J. C. Roos
1955-5-13
6365
Unknown
west side Eureka Valley at mouth of Marble Canyon.
1036
Comment
UCR24301
Swallenia alexandrae
John C. Roos
1955-5-13
6365
Inyo
Northern Mojave Desert, at the mouth of Marble Canyon, on the W side of Eureka Valley
1037
Comment
CAS-BOT-BC269657
Symphoricarpos longiflorus
John Roos; Lucille Roos
1947-7-12
2838
Inyo
Wild Rose [Wildrose] Canyon on north side Baldy Peak, Panamint Mts.
2377
Comment
CLARK-A1528-2414
Symphoricarpos longiflorus
John C. Roos
1941-8-17
27
Inyo
Panamint Mountains
3078
Comment
CLARK-A1528-7871
Symphoricarpos parishii
John C. Roos
1941-8-15
Inyo
Panamint Range
2377
Comment
UC1234731
Symphyotrichum frondosum
J. C. and A. R. Roos
1955-8-28
6564
Inyo
3 mi n, w side of Owens Lake Olancha; Owens Lake
1082
Comment
UCR25311
Symphyotrichum lanceolatum var. hesperium
John C. Roos
1965-9-18
s.n.
Inyo
Owens Valley, west side of Owens Lake
1098
Comment
CLARK-A1528-1458
Tauschia parishii
John C. Roos
1947-6-27
3725
San Bernardino
San Bernardino Mountains|South Fork
2194
Comment
RSA44905
Tauschia parishii
J. C. Roos
1947-6-27
3725
San Bernardino
W ridge of South Fork of Santa Ana River.
2195
Comment
RSA450470
Tetracoccus hallii
J. C. Roos
1965-6-23
s.n.
Riverside
Lost Palms Canyon, Eagle Mountains, Colorado Desert.
Comment
RSA48173
Tetradymia argyraea
J. C. Roos, Weatherby
1949-9-2
3573
San Bernardino
Kingston Mountain; NE of Kingston Peak
2134
Comment
RSA0001629
Tetradymia argyraea
J. C. Roos, R. Weatherby
1949-9-2
3574
San Bernardino
North side of Kingston Mts., eastern Mojave Desert.
1921
Comment
UC1236263
Tetradymia axillaris var. axillaris
John C. Roos
1955-5-16
6390
Inyo
7 mi e Big Pine (Waucoba road, w side Inyo Mts); Inyo Mts.
1615
Comment
RSA79706
Tetradymia canescens
J. C. Roos, A. R. Roos
1953-8-8
5940
Inyo
Badger flat, Inyo Mountains
2652
Comment
UCR19189
Tetradymia canescens
John C. Roos
1965-8-9
s.n.
Inyo
Sierra Nevada Mountains, Independence Creek [near Onion Valley]
2683
Comment
RSA659719
Tetradymia comosa
J. C. Roos
1965-6-27
s.n.
San Bernardino
Loma Linda Hills.
305
Comment
RSA155693
Tetradymia glabrata
J. C. Roos
1955-6-21
6469
Inyo
Inyo Mountains. Narrow canyon along Loretto Rd. 1.5 mi SW of Loretto Mine, E slope of mtns
1677
Comment
RSA45514
Teucrium cubense subsp. depressum
J. C. Roos
1949-4-8
4201
Imperial
Edge of irrigated field, Palo Verde.
Comment
CLARK-A1528-2347
Thelypodium integrifolium
John C. Roos
1946-9-21
3046
San Bernardino
San Bernardino Mountains
1081
Comment
SEINET814546
Thymophylla pentachaeta
J. C. Roos
1948-1
4032
San Bernardino
North slope of Clark Mountain, along powerline.
Comment
UCSB42155
Thymophylla pentachaeta
Roos, John
1950-8-4
San Bernardino
N. side of Clark Mtn., E. Mojave Desert
Comment
UCR25946
Thysanocarpus curvipes
John C. Roos, L. Roos
1952-5-17
5681
Los Angeles
Western Mojave Desert, 16 miles west of Adelanto
915
Comment
RSA0039176
Thysanocarpus desertorum
J. C. Roos, L. Roos
1952-5-17
5681
Los Angeles
16 miles west of Adelanto, Mohave desert.
915
Comment
UCR18803
Thysanocarpus laciniatus
John C. Roos
1948-5-8
3818
Riverside
San Bernardino Mtns, Whitewater
579
Comment
CLARK-A1528-5490
Tidestromia oblongifolia
John C. Roos
1965-7-11
Inyo
Stovepipe Wells
Comment
UCR23546
Tiquilia canescens
John C. Roos
1958-2-22
s.n.
Riverside
Sonoran (Colorado) Desert, Chuckwalla Bench, SW end of Chuckwalla Mtns.
Comment
RSA0103518
Tiquilia canescens var. canescens
J. C. Roos
1949-5-29
3534
San Bernardino
North foot of Clark Mts., eastern Mojave Desert.
1220
Comment
RSA92739
Tiquilia nuttallii
J. C. Roos
1952-5-17
5679
Los Angeles
16 miles W of Adelanto, Mojave Desert.
915
Comment
UCR18799
Tiquilia palmeri
John C. Roos
1965-10-17
s.n.
Riverside
Sonoran (Colorado) Desert, 10 mi. west of Blythe
Comment
CLARK-A1528-2717
Tragia ramosa
John C. Roos
1950-9-3
4978
San Bernardino
Clark Mountain Range
1859
Comment
CLARK-A1528-1385
Trianthema portulacastrum
John C. Roos
1954-11-21
6256
San Bernardino
Loma Linda
335
Comment
UCR19709
Trianthema portulacastrum
John C. Roos
1954-11-21
6256
San Bernardino
San Bernardino Valley, Loma Linda
336
Comment
UC1236221
Tricardia watsonii
John C. Roos
1955-5-16
6388
Inyo
Along Loretto Road 3 miles southwest of Loretto Mine, Inyo Mts.
1859
Comment
CLARK-A1528-2128
Trichocoronis wrightii
John C. Roos
1937-6-7
2505
Riverside
San Jacinto Valley
Comment
CLARK-A1528-2129
Trichoptilium incisum
John C. Roos
1949-3-5
4089
Riverside
Orocopia Mountains
Comment
CLARK-A1528-5695
Trichostema parishii
John C. Roos
1965-6-6
San Bernardino
San Bernardino Mountains
Comment
UCR24374
Tridens muticus
John C. Roos
1949-5-28
3536
San Bernardino
Eastern Mojave Desert, near Coloseum Mine, on the N slopes of Clark Mountain
1829
Comment
UCSB51396
Tridens muticus
Roos, John
1966-11-12
Riverside
Spring Tank, Chuckwalla Mtns.
Comment
UCR25326
Trientalis latifolia
John C. Roos
1939-4-29
290
Napa
North Coast Range, Pacific Union College, Angwin
549
Comment
CLARK-A1528-2877
Trifolium albopurpureum
John C. Roos
1937-5-26
1697
Santa Barbara
Cuyama Valley
Comment
CLARK-A1528-5098
Trifolium fimbriatum
John C. Roos
1965-9-18
Inyo
Owens Lake
Comment
CLARK-A1528-2880
Trifolium gracilentum
John C. Roos
1950-4-1
4720
Los Angeles
Comment
UCR30851
Trifolium kingii subsp. productum
John C. Roos
1948-8-31
3926
Shasta
Castle Crags
1494
Comment
UCR23915
Trifolium monanthum var. grantianum
John C. Roos
1947-6-27
3712
San Bernardino
San Bernardino Mtns, South Fork of Santa Ana River
2165
Comment
UCR23856
Trifolium monoense
John C. Roos
1962-8-25
s.n.
Inyo
Northern Mojave Desert, SW shoulder of Waucoba Mtn, Inyo Mtns
Comment
UCR18630
Trifolium truncatum
John C. Roos
1952-4-2
5458
Riverside
Edgemont
488
Comment
RSA659788
Trifolium variegatum
J. C. Roos
1952-5-26
5714
Riverside
Hass' Ranch. Reche Canyon.
457
Comment
UCR25547
Trifolium willdenovii
John C. Roos
1941-4-25
159
Riverside
Plateau in Reche Canyon
Comment
RSA450121
Trifolium wormskioldii
J. C. Roos
1965-6-26
s.n.
San Bernardino
Santa Ana River Canyon, Heart Bar area, San Bernardino Mtns.
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
CAS-BOT-BC451812
Triglochin maritima
John Roos; Lucille Roos
1954-5-7
6078
Inyo
Amargosa Desert 3 miles NE of Death Valley Junction along Ash Meadows road.
624
Comment
CLARK-A1528-5576
Trisetum canescens
John C. Roos
1941-8-2
86
Riverside
San Jacinto Mountains
2133
Comment
UCR19362
Trisetum canescens
John C. Roos
1947-6-27
3715
San Bernardino
San Bernardino Mountains, Stetson Creek drainage, Barton Flats
1890
Comment
CAS-BOT-BC200174
Trisetum spicatum
John Roos; Lucille Roos
1951-8-10
5145
Mono
East face White Mtn. Peak, White Mts.
4175
Comment
NY1144044
Trisetum spicatum
J. C. Roos
1951-8-10
5145
Mono
White Mountains, east face White Mountain Peak.
4176
Comment
POM263111
Trisetum spicatum
J. C. Roos
1937-8-8
423
Inyo
Lone Pine Canyon.
3049
Comment
RSA78389
Triteleia ixioides subsp. scabra
J. C. Roos
1951-5-27
5049
Mariposa
8 miles E of Mariposa.
1006
Comment
UCSB45530
Triteleia laxa
Roos, John; Roos, Lucille
1952-4-13
San Bernardino
Hills south of Loma Linda, San Bernardino Valley
381
Comment
CLARK-A1528-3021
Turricula parryi
John C. Roos
1946-8-27
2942
Riverside
Santa Rosa Mountains
2194
Comment
UCR23548
Vaccinium cespitosum
John C. Roos
1965-8-8
s.n.
Fresno
Sierra Nevada Mtns., Kearsarge Lake. Middle Section of Kings Canyon National Park
3354
Comment
CLARK-A1528-4323
Verbascum thapsus
John C. Roos
1937-7-25
2359
San Bernardino
San Bernardino Mountains
Comment
CLARK-A1528-4324
Verbascum thapsus
John C. Roos
1968-9-28
San Bernardino
San Bernardino Mountains
1981
Comment
UCR19527
Verbascum thapsus
John C. Roos
1965-7-24
s.n.
San Bernardino
San Bernardino Mtns, Mountain Home Canyon
Comment
CLARK-A1528-7880
Verbena lasiostachys
John C. Roos
1965-9-11
San Bernardino
San Bernardino Mountains
Comment
UCR25145
Verbena lasiostachys
John C. Roos
1965-9-11
s.n.
San Bernardino
San Bernardino Mtns, Mill Creek
Comment
RSA0021079
Verbena lasiostachys var. lasiostachys
J. C. Roos, L. Roos
1952-6-21
5781
Riverside
Pass between Reche Canyon and Moreno Valley, 4 mi. NW of Moreno.
686
Comment
UCR25396
Verbena scabra
John C. Roos
1937-7-31
964
San Bernardino
San Bernardino Valley, San Bernardino
305
Comment
CLARK-A1528-2136
Verbesina encelioides subsp. exauriculata
John C. Roos
1937-6-29
2485
Los Angeles
Oxnard
Comment Read comments Dec 5 2014
CLARK-A1528-4332
Veronica peregrina subsp. xalapensis
John C. Roos
1937-5-10
2073
Riverside
Elsinore
Comment
RSA450073
Veronica peregrina var. xalapensis
J. C. Roos
1966-3-24
s.n.
Riverside
Near Edgemont. On the muddy edge of a vernal pool, assoc. with Callitriche.
Comment
CLARK-A1528-5153
Veronica persica
John C. Roos
1947-3-21
3376
San Bernardino
Loma Linda
Comment
UCR25219
Veronica persica
John C. Roos
1965-6-21
s.n.
Riverside
Hemet
Comment
CLARK-A1528-2898
Vicia exigua
John C. Roos
1937-6-11
1444
San Diego
Campo
Comment
CLARK-A1528-2899
Vicia villosa
John C. Roos
1937-6-11
1436
San Diego
Potrero
Comment
CLARK-A1528-2142
Viguiera multiflora
John C. Roos
1965-7-11
Inyo
Panamint Mountains
Comment
UCR27517
Viola adunca
John C. Roos
1937-6-5
931
San Bernardino
San Bernardino Mtns., Crestline
Comment
UCR26257
Viola lobata
John C. Roos
1937-6-15
524
San Diego
Peninsular Range, Julian
Comment
CLARK-A1528-4410
Viola macloskeyi
John C. Roos
1937-7-22
2369
San Bernardino
San Bernardino Mountains
Comment
UCR23755
Vitis girdiana
John C. Roos
1965-10-7
s.n.
Riverside
Fairmont Park in Riverside
244
Comment
UCR23758
Vitis girdiana
John C. Roos
1947-6-21
3700
San Bernardino
San Bernardino Mtns, Cushenbury Canyon, alkaline springs [probably Whiskey Springs] on north side of the mountains
1677
Comment
POM263251
Vulpia microstachys var. confusa
J. C. Roos
1939-4-18
251
Napa
3.5 miles north of Pacific Union College, Angwin.
Comment
POM266331
Vulpia microstachys var. pauciflora
J. C. Roos
1937-5-2
1282
Riverside
La Sierra, western Riverside. [Collection is Jack Frost Lake. aka Frost Reservoir, apparently a part of La Sierra [Loma Linda University Campus] ca. 1937 south of Indiana Avenue and west of Sayward Circle, near Pierce;, Owned by city of Riverside ca. 2000
Comment
RSA85582
Vulpia microstachys var. pauciflora
J. C. Roos
1952-4-2
5464
Riverside
Box Springs grade east of Riverside.
427
Comment
UCR24387
Whipplea modesta
John C. Roos
1939-5-6
295
Napa
North Coast Range, Pacific Union College, Angwin
549
Comment
UCR19498
Xanthium spinosum
John C. Roos
1965-7-21
s.n.
San Bernardino
San Bernardino Valley, Loma Linda
396
Comment
CLARK-A1528-3055
Xylococcus bicolor
John C. Roos, Lucille Roos
1954-2-13
6044
San Diego
Merriam Mountains
Comment
UCSB45518
Zeltnera muehlenbergii
Roos, John
1957-7-3
Sonoma
Healdsberg
Comment
UCR18905
Ziziphus obtusifolia
John C. Roos
1965-6-23
s.n.
Riverside
Sonoran (Colorado) Desert, Eagle Mtns, Lost Palms Wash
Comment