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Specimen ID
Determination *
Collector
Collection Date
Collection Number
County
Locality
Elevation in meters
Feedback
CAS-BOT-BC108879
Ribes divaricatum var. parishii
John Roos; Lucille Roos
1951-3-10
5032
Los Angeles
San Gabriel River at Whittier Narrows. Flowers maroon.
60
Comment
CAS-BOT-BC173433
Ribes malvaceum
J. C. Roos
1966-2-11
s.n.
Los Angeles
Claremont
304
Comment
CAS-BOT-BC184912
Chloris gayana
J. C. Roos; A. R. Roos
1950-9-16
4987
Los Angeles
Los Angeles. Santa Monica Boulevard at Midvale Avenue.
60
Comment
CAS-BOT-BC206368
Malacothamnus fremontii
J. C. Roos
1951-7-30
5072
Los Angeles
Big Rock Creek, San Gabriel Mts.
1676
Comment
CAS-BOT-BC247055
Poa secunda subsp. juncifolia
John Roos; Lucille Roos
1951-5-27
5055
Los Angeles
Flats between Lancaster and Rosamond, Mojave Desert
701
Comment
CAS-BOT-BC262697
Muhlenbergia californica
John C. Roos
1951-7-30
5075
Los Angeles
Big Rock Creek, north of Mt. Baden Powell, San Gabriel Mts.
1981
Comment
CLARK-A1528-1008
Hoffmannseggia falcaria
John C. Roos
1947-5-25
3649
Los Angeles
Monterey Park
115
Comment
CLARK-A1528-1099
Artemisia tridentata subsp. parishii
John C. Roos
1946-11-23
3158
Los Angeles
Placerita Canyon
365
Comment
CLARK-A1528-1135
Dudleya saxosa subsp. aloides
John C. Roos
1947-5-17
3625
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-1146
Quercus lobata
John C. Roos
1946-11-23
3157
Los Angeles
Placerita Canyon
365
Comment
CLARK-A1528-1207
Lycium cooperi
John C. Roos
1937-5-31
690
Los Angeles
Comment
CLARK-A1528-1256
Chloris gayana
John C. Roos, Alfred R. Roos
1950-9-16
4987
Los Angeles
Los Angeles
60
Comment
CLARK-A1528-1281
Agrostis diegoensis
John C. Roos
1939-6-8
Los Angeles
Burbank
Comment
CLARK-A1528-1298
Ribes malvaceum var. viridifolium
John C. Roos
1943-3-20
2598
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-1380
Mollugo verticillata
John C. Roos
1939-6-21
920
Los Angeles
Pasadena
Comment
CLARK-A1528-1410
Rhus integrifolia
John C. Roos
1949-2-13
4083
Los Angeles
Whittier
Comment
CLARK-A1528-1518
Bloomeria crocea
John C. Roos
1958-5-2
Los Angeles
Brentwood
Comment
CLARK-A1528-1540
Ambrosia psilostachya
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-1542
Ambrosia psilostachya
John C. Roos
1941-2-17
Los Angeles
Westwood
Comment
CLARK-A1528-1561
Artemisia californica
John C. Roos
1942-9-20
1710
Los Angeles
Hollywood Hills
Comment
CLARK-A1528-1568
Artemisia douglasiana
John C. Roos
1942-9-12
1733
Los Angeles
Santa Monica
Comment
CLARK-A1528-1595
Artemisia tridentata subsp. parishii
John C. Roos
1949-11-24
4699
Los Angeles
Lancaster
Comment
CLARK-A1528-1596
Artemisia tridentata subsp. parishii
John C. Roos
1937-8-11
2527
Los Angeles
Newhall
Comment
CLARK-A1528-1599
Artemisia tridentata subsp. parishii
John C. Roos
1942-10-31
2580
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-1785
Corethrogyne filaginifolia
John C. Roos
1942-9-12
1719
Los Angeles
Westwood
Comment
CLARK-A1528-1787
Corethrogyne filaginifolia var. peirsonii
John C. Roos
1937-8-11
2543
Los Angeles
Comment
CLARK-A1528-1807
Encelia californica
John C. Roos
1946-10-12
3130
Los Angeles
Los Angeles
Comment
CLARK-A1528-1850
Gnaphalium chilense
John C. Roos
1942-5-23
1059
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-1860
Grindelia robusta
John C. Roos
1937-6-29
2484
Los Angeles
Malibu Beach
Comment
CLARK-A1528-1870
Haplopappus acradenius
John C. Roos
1947-9-18
2791
Los Angeles
Comment
CLARK-A1528-1885
Haplopappus ericoides
John C. Roos
1946-10-12
3129
Los Angeles
West Los Angeles
Comment
CLARK-A1528-1893
Haplopappus venetus
John C. Roos
1942-9-12
1720
Los Angeles
Comment
CLARK-A1528-1908
Helianthus annuus
John C. Roos
1942-9-26
1714
Los Angeles
Westwood Village
Comment
CLARK-A1528-1926
Hemizonia ramosissima
John C. Roos
1942-9-20
1745
Los Angeles
West Los Angeles
Comment
CLARK-A1528-1929
Heterotheca grandiflora
John C. Roos
1942-9-26
1715
Los Angeles
Los Angeles
Comment
CLARK-A1528-1953
Hulsea vestita
John C. Roos
1937-7-16
2469
Los Angeles
San Gabriel Mountains
2895
Comment
CLARK-A1528-2009
Malacothrix saxatilis var. tenuifolia
John C. Roos
1937-6-29
2486
Los Angeles
Malibu Beach
Comment
CLARK-A1528-2010
Malacothrix saxatilis var. tenuifolia
John C. Roos
1942-10-3
1739
Los Angeles
Westwood Village
Comment
CLARK-A1528-2134
Venegasia carpesioides
John C. Roos
1942-3-14
998
Los Angeles
West Los Angeles
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-A1528-2150
Conyza bonariensis
John C. Roos
1942-9-26
1713
Los Angeles
Westwood Village
Comment
CLARK-A1528-2161
Senecio douglasii
John C. Roos
1940-8-31
242
Los Angeles
San Gabriel River
Comment
CLARK-A1528-2178
Verbesina encelioides subsp. exauriculata
John C. Roos
1939-6-14
915
Los Angeles
Van Nuys
Comment
CLARK-A1528-2186
Galinsoga parviflora
John C. Roos
1939-6-21
919
Los Angeles
Pasadena
Comment
CLARK-A1528-2288
Arabis platysperma
John C. Roos
1937-7-16
2414
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-2289
Arabis platysperma
John C. Roos
1937-7-28
2354
Los Angeles
San Bernardino Mountains
Comment
CLARK-A1528-2301
Cardamine oligosperma
Alfred R. Roos
1958-6-3
Los Angeles
Brentwood
Comment
CLARK-A1528-2322
Lepidium flavum
John C. Roos
1937-3-25
1336
Los Angeles
Comment
CLARK-A1528-2328
Lepidium pinnatifidum
John C. Roos
1956-6-15
Los Angeles
Westwood
Comment
CLARK-A1528-2356
Tropidocarpum gracile
John C. Roos
1937-3-25
1335
Los Angeles
Comment
CLARK-A1528-2384
Cleomella obtusifolia
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2456
Polycarpon tetraphyllum
John C. Roos
1958-5-2
Los Angeles
West Los Angeles
Comment
CLARK-A1528-2494
Atriplex nummularia
John C. Roos
1937-9-2
2555
Los Angeles
Playa Del Rey
Comment
CLARK-A1528-2502
Atriplex rosea
Alfred R. Roos
1948-8-21
Los Angeles
Long Beach
Comment
CLARK-A1528-2532
Allenrolfea occidentalis
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2535
Atriplex argentea
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2536
Atriplex lentiformis subsp. breweri
John C. Roos
1942-9-12
1724
Los Angeles
Santa Monica
15
Comment
CLARK-A1528-2538
Atriplex argentea subsp. expansa
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2547
Atriplex parryi
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2553
Chenopodium album
John C. Roos
1947-8-17
Los Angeles
San Fernando Valley
Comment
CLARK-A1528-2583
Kochia americana
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2599
Suaeda californica
John C. Roos
1942-9-12
1742
Los Angeles
Santa Monica
Comment
CLARK-A1528-2603
Suaeda fruticosa
John C. Roos
1947-7-21
Los Angeles
Lancaster
Comment
CLARK-A1528-2614
Cornus sericea subsp. sericea
John C. Roos
1950-7-15
4851
Los Angeles
San Gabriel Mountains
60
Comment Read comments Dec 2 2014
CLARK-A1528-2616
Cornus occidentalis
John C. Roos
1947-5-31
3666
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-2645
Zauschneria cana
John C. Roos
1941-10-11
866
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-2701
Euphorbia maculata
John C. Roos
1942-9-12
1756
Los Angeles
Los Angeles
Comment
CLARK-A1528-2722
Acacia melanoxylon
John C. Roos
1943-8-5
Los Angeles
Pomona
Comment
CLARK-A1528-2763
Astragalus trichopodus subsp. antisellii
John C. Roos
1937-7-29
1245
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-2842
Lupinus horizontalis var. platypetalus
John C. Roos
1941-4-12
181
Los Angeles
Palmdale
Comment
CLARK-A1528-2915
Quercus agrifolia
Alfred R. Roos
1937-12-15
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-2923
Quercus engelmannii
John C. Roos
1946-10-12
3131
Los Angeles
Monrovia
Comment
CLARK-A1528-3003
Phacelia davidsonii
John C. Roos
1937-5-31
750
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3004
Phacelia davidsonii
John C. Roos
1937-5-31
1540
Los Angeles
Wrightwood
Comment
CLARK-A1528-3007
Phacelia fremontii
John C. Roos
1937-5-31
668
Los Angeles
Wrightwood
Comment
CLARK-A1528-3054
Sarcodes sanguinea
John C. Roos
1966-6-15
Los Angeles
San Gabriel Mountains
2377
Comment
CLARK-A1528-3164
Mentzelia gracilenta
John C. Roos
1937-3-25
543
Los Angeles
Lancaster
Comment
CLARK-A1528-3198
Smilacina stellata
John C. Roos
1937-5-31
761
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3229
Lavatera assurgentiflora
Alfred R. Roos
1948-4-8
Los Angeles
Culver City
Comment
CLARK-A1528-3239
Sida leprosa var. hederacea
John C. Roos
1942-9-5
1744
Los Angeles
Westwood Village
Comment
CLARK-A1528-3288
Forestiera neomexicana
John C. Roos
1937-8-11
22
Los Angeles
Lancaster
Comment
CLARK-A1528-3307
Zauschneria californica subsp. latifolia
John C. Roos
1937-7-16
2415
Los Angeles
Mount Baldy
2743
Comment
CLARK-A1528-3310
Zauschneria cana
John C. Roos
1936-10-13
1536
Los Angeles
Arroyo Seco
Comment
CLARK-A1528-3311
Zauschneria cana
John C. Roos
1946-11-23
3159
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-3325
Camissonia cheiranthifolia
Alfred R. Roos
1956-5-22
Los Angeles
9
Comment
CLARK-A1528-3327
Camissonia claviformis
John C. Roos
1937-3-25
1324
Los Angeles
Comment
CLARK-A1528-3373
Clarkia unguiculata
John C. Roos
1942-6-6
989
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-3374
Clarkia xantiana
John C. Roos
1937-5-31
2036
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3414
Meconella denticulata
John C. Roos
1942-5-23
1069
Los Angeles
San Gabriel Mountains
0
Comment
CLARK-A1528-3442
Linanthus breviculus
John C. Roos
1937-5-31
759
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3458
Allophyllum gilioides
John C. Roos
1937-5-31
2030
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3459
Allophyllum gilioides
John C. Roos
1937-5-31
1541
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3468
Linanthus dianthiflorus
John C. Roos
1937-3-17
2640
Los Angeles
San Fernando Valley
Comment
CLARK-A1528-3495
Eriastrum sapphirinum
John C. Roos
1937-7-7
1768
Los Angeles
La Crescenta
Comment
CLARK-A1528-3518
Gilia splendens subsp. splendens
John C. Roos
1937-5-31
754
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3533
Leptodactylon pungens
John C. Roos
1937-7-16
2421
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3567
Notholaena californica
John C. Roos
1946-11-23
3160
Los Angeles
Newhall
Comment
CLARK-A1528-3593
Dryopteris arguta
John C. Roos
1942-3-21
1099
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3606
Chorizanthe staticoides
John C. Roos
1937-5-19
1805
Los Angeles
Claremont
Comment
CLARK-A1528-3608
Chorizanthe staticoides
John C. Roos
1937-7-19
1803
Los Angeles
Comment
CLARK-A1528-3622
Eriogonum cinereum
John C. Roos
1942-9-26
1727
Los Angeles
Santa Monica
Comment
CLARK-A1528-3623
Eriogonum crocatum
John C. Roos
1958-5-22
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-3665
Eriogonum cinereum
John C. Roos
1942-9-26
1727
Los Angeles
Santa Monica
Comment
CLARK-A1528-3689
Eriogonum parvifolium
John C. Roos
1943-8-2
Los Angeles
Santa Monica
Comment
CLARK-A1528-3730
Eriogonum davidsonii
John C. Roos
1937-7-18
403
Los Angeles
San Antonio Canyon
914
Comment
CLARK-A1528-3808
Plantago hirtella
John C. Roos
1942-7-8
1273
Los Angeles
Los Angeles
Comment
CLARK-A1528-3883
Ceanothus crassifolius
John C. Roos
1942-3-7
1105
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3900
Ceanothus spinosus
John C. Roos
1942-3-14
997
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-3901
Ceanothus spinosus
Alfred R. Roos
1948-4-9
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-3913
Ceanothus megacarpus
John C. Roos
1943-3-30
2599
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-3925
Oxalis albicans subsp. pilosa
John C. Roos
1937-9-2
520
Los Angeles
Redondo Beach
Comment
CLARK-A1528-3998
Horkelia cuneata
John C. Roos
1937-7-7
1931
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4060
Salix scouleriana
John C. Roos
1937-7-16
620
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4082
Ailanthus altissima
Alfred R. Roos
1949-7-21
Los Angeles
Los Angeles
Comment
CLARK-A1528-4106
Lithophragma heterophyllum
John C. Roos
1942-4-18
1083
Los Angeles
San Gabriel Mountains
Comment Read comments Aug 22 2016
CLARK-A1528-4115
Ribes amarum
John C. Roos
1942-4-18
1085
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4116
Ribes amarum
John C. Roos
1942-3-21
1092
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4117
Ribes aureum var. gracillimum
John C. Roos
1962-3-10
Los Angeles
Claremont
Comment
CLARK-A1528-4119
Ribes californicum var. hesperium
John C. Roos
1942-3-21
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4120
Ribes californicum var. hesperium
John C. Roos
1966-2-4
Los Angeles
Claremont
Comment
CLARK-A1528-4133
Ribes malvaceum var. viridifolium
John C. Roos
1966-2-11
Los Angeles
Claremont
304
Comment
CLARK-A1528-4134
Ribes malvaceum var. viridifolium
John C. Roos
1942-12-5
Los Angeles
Santa Anita Canyon
Comment
CLARK-A1528-4145
Ribes roezlii
John C. Roos
1943-2-13
2596
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4150
Ribes speciosum
John C. Roos
1942-3-14
999
Los Angeles
West Los Angeles
Comment
CLARK-A1528-4157
Ribes viburnifolium
John C. Roos
1966-2-26
Los Angeles
Claremont
Comment
CLARK-A1528-4186
Collinsia callosa
John C. Roos
1937-5-31
2032
Los Angeles
San Gabriel Mountains| Big Pines
Comment
CLARK-A1528-4210
Galvezia speciosa
John C. Roos
1966-2-4
Los Angeles
Claremont
Comment
CLARK-A1528-4212
Keckiella cordifolia
John C. Roos
1942-5-23
1054
Los Angeles
Santa Anita Canyon
Comment
CLARK-A1528-4304
Penstemon grinnellii
John C. Roos
1937-5-31
758
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4378
Solanum xanti var. montanum
John C. Roos
1937-5-31
755
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4379
Solanum xanti var. intermedium
John C. Roos
1937-6-29
1485
Los Angeles
Malibu Beach
Comment
CLARK-A1528-4403
Verbena lasiostachys
John C. Roos
1937-3-25
1332
Los Angeles
Comment
CLARK-A1528-4420
Phoradendron juniperinum subsp. libocedri
John C. Roos
1937-5-31
2031
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4499
Bothriochloa barbinodis
John C. Roos
1937-6-29
1483
Los Angeles
Malibu
Comment
CLARK-A1528-4536
Bromus grandis
John C. Roos
1942-5-23
1060
Los Angeles
Santa Anita Canyon
Comment
CLARK-A1528-4537
Bromus grandis
John C. Roos
1942-5-23
1060
Los Angeles
Santa Anita Canyon
Comment
CLARK-A1528-4565
Bromus unioloides
John C. Roos
1941-2-17
Los Angeles
Westwood Village
Comment
CLARK-A1528-4571
Chloris gayana
John C. Roos, Alfred R. Roos
1950-9-16
4987
Los Angeles
Los Angeles
60
Comment
CLARK-A1528-4576
Cynodon dactylon
John C. Roos
1942-9-5
1717
Los Angeles
Los Angeles
Comment
CLARK-A1528-4584
Digitaria ischaemum
John C. Roos, Alfred R. Roos
1950-9-16
4989
Los Angeles
Los Angeles
60
Comment
CLARK-A1528-4586
Digitaria ischaemum
John C. Roos
1949-10-19
4692
Los Angeles
San Gabriel
121
Comment
CLARK-A1528-4718
Lolium perenne subsp. multiflorum
John C. Roos
1947-10-12
Los Angeles
West Los Angeles
Comment
CLARK-A1528-4719
Lolium perenne subsp. multiflorum
John C. Roos
1949-6-28
Los Angeles
Los Angeles
60
Comment
CLARK-A1528-4726
Melica imperfecta
John C. Roos
1937-3-25
442
Los Angeles
Lancaster
Comment
CLARK-A1528-4728
Melica imperfecta
John C. Roos
1937-4-21
Los Angeles
Claremont
Comment
CLARK-A1528-4736
Melica stricta
John C. Roos
1937-5-31
611
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4776
Oryzopsis miliacea
John C. Roos
1942-9-27
1734
Los Angeles
Los Angeles
Comment
CLARK-A1528-4790
Paspalum dilatatum
John C. Roos
1947-5-11
3605
Los Angeles
Los Angeles
Comment
CLARK-A1528-4794
Phalaris canariensis
Alfred R. Roos
1958-5-21
Los Angeles
Brentwood
Comment
CLARK-A1528-4842
Polypogon semiverticillatus
John C. Roos
1942-9-12
1718
Los Angeles
Westwood
Comment
CLARK-A1528-4844
Polypogon semiverticillatus
John C. Roos
1942-5-22
Los Angeles
Hollywood
Comment
CLARK-A1528-4913
Astragalus bicristatus
John C. Roos
1937-5-31
491
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4924
Astragalus douglasii var. douglasii
John C. Roos
1937-5-31
2045
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4928
Chaenactis santolinoides
John C. Roos
1937-5-31
2035
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4929
Medicago lupulina
John C. Roos
1937-5-31
2033
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4981
Lupinus longifolius
John C. Roos
1937-6-29
1707
Los Angeles
Santa Monica Mountains
Comment
CLARK-A1528-5004
Quercus agrifolia
John C. Roos
1937-4-18
1363
Los Angeles
Live Oak Canyon
Comment
CLARK-A1528-5090
Chlorogalum pomeridianum
John C. Roos
1947-5-17
3624
Los Angeles
396
Comment
CLARK-A1528-5107
Phacelia douglasii
John C. Roos
1937-3-25
680
Los Angeles
914
Comment
CLARK-A1528-5109
Phacelia viscida
John C. Roos
1937-7-7
404
Los Angeles
La Crescenta
478
Comment
CLARK-A1528-5113
Nicotiana glauca
John C. Roos
1942-9-20
1746
Los Angeles
West Los Angeles
Comment
CLARK-A1528-5135
Silene verecunda subsp. platyota
John C. Roos
1937-5-31
760
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-5136
Phacelia lemmonii
John C. Roos
1937-5-31
675
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-5140
Zauschneria cana
John C. Roos
1936-10-13
1536
Los Angeles
South Pasadena
Comment
CLARK-A1528-5160
Potamogeton crispus
John C. Roos
1950-7-15
4852
Los Angeles
San Gabriel River
60
Comment
CLARK-A1528-5171
Lithophragma heterophyllum
John C. Roos
1942-4-18
1082
Los Angeles
San Gabriel Mountains
Comment Read comments Aug 22 2016
CLARK-A1528-5191
Ailanthus altissima
Alfred R. Roos
1949-7-21
Los Angeles
Los Angeles
Comment
CLARK-A1528-5205
Eriogonum parvifolium
John C. Roos
1943-8-2
Los Angeles
Santa Monica
Comment
CLARK-A1528-5247
Trifolium wormskioldii
John C. Roos
1937-5-31
756
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-5285
Stipa cernua
John C. Roos
1945-3-14
Los Angeles
Los Angeles
Comment
CLARK-A1528-5422
Suaeda californica
John C. Roos
1942-9-12
1742
Los Angeles
Santa Monica
Comment
CLARK-A1528-5499
Artemisia tridentata subsp. parishii
John C. Roos
1949-12-24
4699
Los Angeles
Comment
CLARK-A1528-5585
Chloris virgata
John C. Roos
1947-7-16
3727
Los Angeles
West Covina
Comment
CLARK-A1528-5587
Avena fatua
John C. Roos
1943-3-20
2600
Los Angeles
Westwood Village
Comment
CLARK-A1528-5591
Poa secunda
John C. Roos, Lucille Roos
1951-5-27
5055
Los Angeles
Antelope Valley
701
Comment
CLARK-A1528-5592
Poa secunda
John C. Roos, Lucille Roos
1951-5-27
5055
Los Angeles
Antelope Valley
701
Comment
CLARK-A1528-5599
Polystichum munitum
John C. Roos
1937-7-3
Los Angeles
La Canada
Comment
CLARK-A1528-5600
Artemisia tridentata subsp. parishii
John C. Roos
1949-11-27
4704
Los Angeles
Antelope Valley
822
Comment
CLARK-A1528-5646
Symphoricarpos vaccinioides
John C. Roos
1937-5-31
2046
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-5717
Eriogonum cinereum
John C. Roos
1937-6-29
1487
Los Angeles
Malibu Beach
Comment
CLARK-A1528-5726
Galium parvifolium
John C. Roos
1937-7-16
484
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-7758
Allium monticola
John C. Roos
1937-7-16
636
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-7759
Allium monticola
John C. Roos
1937-7-16
636
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-7796
Geranium robertianum
Alfred R. Roos
1958-6-3
Los Angeles
Brentwood
Comment
CLARK-A1528-7811
Hoffmannseggia falcaria
John C. Roos
1940-8-31
241
Los Angeles
Monterey Park
Comment
CLARK-A1528-7813
Physalis neomexicana
John C. Roos
1942-8-26
1749
Los Angeles
San Gabriel
Comment
CLARK-A1528-7861
Barbarea orthoceras
John C. Roos
1947-5-31
3664
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-7870
Convolvulus althaeoides
John C. Roos
1950-5-9
4793
Los Angeles
Los Angeles
91
Comment
CLARK-A1528-7878
Apium leptophyllum
John C. Roos
1951-8-1
5079
Los Angeles
Los Angeles
60
Comment
CLARK-A1528-7879
Viola purpurea subsp. mohavensis
John C. Roos
1937-5-31
522
Los Angeles
Big Pines
Comment
CLARK-A1528-861
Mimulus bigelovii
John C. Roos
1941-4-12
195
Los Angeles
Palmdale
Comment
OBI30458
Penstemon heterophyllus
J. C. Roos
1947-5-17
3632
Los Angeles
Placerita Cyn
Comment
OBI30462
Antirrhinum multiflorum
J. C. Roos
1947-5-17
3636
Los Angeles
Placerita Cyn, E of Newhall
Comment
OBI40201
Agrostis stolonifera
John C. Roos
1950-9-16
4988
Los Angeles
Santa Monica Blvd & Midvale Ave, Los Angeles
61
Comment
POM18164
Symphyotrichum ascendens
A. R. Roos
1922-11-8
s.n.
Los Angeles
San Gabriel Mountians: Lytle Creek Canyon
915
Comment
POM251787
Forestiera pubescens
J. C. Roos
1937-8-11
22
Los Angeles
W of Lancaster, Mojave Desert
Comment
POM262778
Toxicodendron diversilobum
A. R. Roos
1936-4-15
707
Los Angeles
Claremont.
Comment
POM262782
Senecio flaccidus var. douglasii
J. C. Roos
1940-8-31
242
Los Angeles
San Gabriel River, near El Monte
Comment
POM262945
Mimulus fremontii
J. C. Roos
1941-4-12
195
Los Angeles
Palmdale.
Comment
POM262963
Salix scouleriana
J. C. Roos
1937-7-16
620
Los Angeles
Near Mt. San Antonio, San Gabriel Mountains.
2287
Comment
POM262977
Lupinus ruber
J. C. Roos
1941-4-12
181
Los Angeles
Palmdale.
Comment
POM263001
Melica stricta
J. C. Roos
1937-5-31
611
Los Angeles
near Jackson Lake, San Gabriel Mountains
Comment
POM263029
Rubus leucodermis
J. C. Roos
1937-7-16
374
Los Angeles
Stockton Flats, San Gabriel Mountains.
Comment Read comments Feb 4 2014
POM263030
Eriogonum saxatile
J. C. Roos
1937-7-16
373
Los Angeles
Mt. San Antonio [Los Angeles - San Bernardino counties].
2744
Comment
POM263032
Eriogonum umbellatum var. minus
J. C. Roos
1937-7-16
371
Los Angeles
Mt. San Antonio [Los Angeles - San Bernardino counties].
2744
Comment
POM263063
Malacothamnus davidsonii
J. C. Roos
1937-7-7
331
Los Angeles
Near San Fernando
Comment
POM263065
Viola purpurea subsp. mohavensis
J. C. Roos
1937-5-31
522
Los Angeles
Big Pines.
Comment
POM263069
Hoffmannseggia glauca
J. C. Roos
1940-8-31
241
Los Angeles
Monterey Park.
Comment
POM263114
Achnatherum occidentale subsp. occidentale
J. C. Roos
1937-7-18
398
Los Angeles
Mt. Wilson observatory grounds
2651
Comment Read comments Nov 13 2011
POM263142
Oreonana vestita
J. C. Roos
1937-7-16
390
Los Angeles
Mt. San Antonio [Los Angeles-San Bernardino County line]
2744
Comment
POM263143
Galium angustifolium subsp. gabrielense
J. C. Roos
1937-7-18
400
Los Angeles
Upper San Antonio Canyon.
Comment
POM263184
Melica imperfecta
J. C. Roos
1937-3-25
442
Los Angeles
12 miles west of Lancaster
Comment
POM263246
Lycium cooperi
J. C. Roos
1937-5-31
690
Los Angeles
Desert S of Lancaster.
Comment
POM263247
Eriogonum davidsonii
J. C. Roos
1937-7-18
403
Los Angeles
San Antonio Canyon, between Los Angeles and San Bernardino counties.
Comment
POM263282
Mentzelia congesta
J. C. Roos
1937-5-31
547
Los Angeles
Big Pines.
Comment
POM263549
Leptosiphon liniflorus
J. C. Roos
1937-5-31
649
Los Angeles
Lancaster.
Comment
POM263552
Allium monticola
J. C. Roos
1937-7-16
636
Los Angeles
Los Angeles - San bernardino counties. Mt. San Antonio
2744
Comment
POM263557
Madia elegans subsp. elegans
J. C. Roos
1937-7-18
401
Los Angeles
Mirror Lake, San Antonio Canyon. Boundary between Los Angeles and San Antonio Canyon
Comment
POM265629
Atriplex coulteri
J. C. Roos
1937-6-29
2156
Los Angeles
Malibu Beach.
Comment
POM265634
Eriogonum cinereum
J. C. Roos
1942-9-26
1727
Los Angeles
Sea bluffs, Santa Monica.
Comment
POM265665
Lithophragma heterophyllum
J. C. Roos
1942-4-18
1083
Los Angeles
Santa Anita Canyon, San Gabriel Mts
Comment
POM265671
Lithophragma heterophyllum
J. C. Roos
1942-4-18
1082
Los Angeles
Santa Anita Canyon, San Gabriel Mts
Comment
POM265677
Ribes amarum
J. C. Roos
1942-4-18
1085
Los Angeles
E Fork of Santa Anita Canyon, San Gabriel Mts
Comment
POM265683
Dudleya cymosa subsp. pumila
J. C. Roos
1942-5-23
1062
Los Angeles
near Chantry Flats, Santa Anita Canyon.
Comment
POM265707
Chenopodium multifidum
J. C. Roos
1937-7-19
1159
Los Angeles
Pasadena.
Comment
POM265726
Dudleya lanceolata
J. C. Roos
1937-6-29
1788
Los Angeles
Malibu Beach.
Comment
POM265773
Collinsia callosa
J. C. Roos
1937-5-31
2032
Los Angeles
Near Big Pines, north side of San Gabriel Mountains.
Comment
POM265798
Malacothamnus fasciculatus
John Roos
1942-8-27
1730
Los Angeles
mouth of Mandeville Canyon, west LA
Comment
POM265803
Ceanothus oliganthus
J. C. Roos
1942-3-7
1106
Los Angeles
On brushy delta, La Canada
Comment
POM265804
Ceanothus crassifolius
J. C. Roos
1942-3-7
1105
Los Angeles
Big Tujunga Canyon.
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
POM265816
Epilobium canum subsp. canum
J. C. Roos
1941-10-11
866
Los Angeles
Mandeville Canyon, Santa Monica Mountains.
Comment
POM266276
Bromus grandis
J. C. Roos
1942-5-23
1060
Los Angeles
Santa Anita Canyon, San Gabriel Mountains.
Comment
POM266283
Ericameria parishii var. parishii
J. C. Roos
1937-10-30
2261
Los Angeles
Lytle Creek, east end of San Gabriel Mts.
Comment
POM266284
Ericameria pinifolia
J. C. Roos
1942-10-10
1723
Los Angeles
Westwood Village NW of Los Angeles County
Comment
POM266286
Isocoma menziesii var. vernonioides
J. C. Roos
1942-9-12
1720
Los Angeles
Northwest of Santa Monica.
Comment
POM266288
Corethrogyne filaginifolia
J. C. Roos
1937-8-11
2543
Los Angeles
Gorman, Tehachapi Mts.
Comment
POM266289
Corethrogyne filaginifolia var. filaginifolia
J. C. Roos
1942-9-12
1719
Los Angeles
Westwood Village.
Comment
POM266306
Galinsoga parviflora
J. C. Roos
1939-6-21
919
Los Angeles
Irrigated field, Pasadena
Comment
POM266313
Hulsea vestita subsp. parryi
J. C. Roos
2469
Los Angeles
north slope of Mt. San Antonio
2895
Comment
POM266351
Quercus chrysolepis
J. C. Roos
1942-5-23
1056
Los Angeles
Santa Anita Canyon, San Gabriel Mountains.
Comment
POM266612
Leptochloa fusca subsp. fascicularis
J. C. Roos
1942-9-12
1732
Los Angeles
Roosevelt Highway, Santa Monica.
Comment
POM266622
Polypogon viridis
J. C. Roos
1942-9-12
1718
Los Angeles
Westwood Village, Los Angeles.
Comment Read comments Dec 6 2011
POM266627
Achnatherum coronatum
J. C. Roos
1942-3-7
1002
Los Angeles
Mouth of Big Tujunga Canyon, west end of San Gabriel Mts.
Comment
POM266898
Eleusine indica
J. C. Roos
1942-10-1
1735
Los Angeles
Los Angeles.
Comment
POM274198
Kochia californica
J. C. Roos
1947-9-18
2790
Los Angeles
2 mi. N of Lancaster.
Comment
POM274199
Isocoma acradenia
J. C. Roos
1947-9-18
2791
Los Angeles
Lancaster
Comment
POM301544
Arbutus menziesii
J. C. Roos
1942-3-21
1095
Los Angeles
Chantry Flats, Santa Anita Canyon
Comment
POM301598
Phacelia davidsonii
J. C. Roos
1937-5-31
1540
Los Angeles
near Jackson Lake, San Gabriel Mountains
Comment
POM301691
Paspalum dilatatum
J. C. Roos
1942-10-1
1736
Los Angeles
North Boyle and Brooklyn Ave.
Comment
POM301701
Piptatherum miliaceum
J. C. Roos
1942-9-27
1734
Los Angeles
Corner North Orlando and Beverly Blvd.
Comment
POM301715
Bothriochloa barbinodis
J. C. Roos
1937-6-29
1483
Los Angeles
Malibu Beach.
Comment
POM302527
Ribes amarum
J. C. Roos
1943-2-13
2597
Los Angeles
near Chantry Flats, Santa Anita Canyon
Comment
POM302528
Ribes malvaceum var. viridifolium
J. C. Roos
1943-3-20
2598
Los Angeles
Sepulveda Blvd, Santa Monica Mts, Los Angeles
Comment
RSA0006712
Astragalus bicristatus
J. C. Roos
1937-5-31
491
Los Angeles
Big Pines.
Comment
RSA0021116
Ribes lasianthum
J. C. Roos
1937-5-31
10
Los Angeles
Big Pines.
Comment
RSA0063083
Heuchera abramsii
J. C. Roos
1937-8-16
370
Los Angeles
Mt. San Antonio.
3049
Comment
RSA263243
Elatine brachysperma
J. C. Roos
1937-7-18
397
Los Angeles
Mirror Lake, San Antonio Canyon
Comment
RSA34196
Isocoma acradenia
J. C. Roos
1947-9-18
2791
Los Angeles
Lancaster
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
RSA40561
Notholaena californica subsp. leucophylla
J. C. Roos
1946-11-23
3160
Los Angeles
Placerita canyon, east of Newhall
Comment
RSA425022
Lolium perenne subsp. multiflorum
J. C. Roos
1947-10-12
s.n.
Los Angeles
Charnock St., West Los Angeles
Comment
RSA44891
Barbarea orthoceras
J. C. Roos
1947-5-31
3664
Los Angeles
Meadow near Jackson Lake.
Comment
RSA44893
Phacelia cicutaria var. hubbyi
J. C. Roos
1947-5-4
3603
Los Angeles
Kellogg Hill West of Pomona, Los Angeles County
Comment
RSA44914
Isomeris arborea
J. C. Roos
1947-5-31
3660
Los Angeles
North base of San Gabriel Mountains. Big Rock Spring.
Comment
RSA450062
Sarcodes sanguinea
J. C. Roos
1966-6-15
s.n.
Los Angeles
N. slope of Mount Baden-Powell near laurel Spring
2378
Comment
RSA450193
Quercus agrifolia
A. R. Roos
1937-12-15
s.n.
Los Angeles
Sepulveda Canyon
Comment
RSA450229
Ribes malvaceum var. viridifolium
J. C. Roos
1966-2-11
s.n.
Los Angeles
Claremont.
Comment
RSA450260
Ribes californicum var. hesperium
J. C. Roos
1966-2-4
s.n.
Los Angeles
Claremont.
Comment
RSA469845
Navarretia hamata subsp. hamata
A. R. Roos
1922-11-8
s.n.
Los Angeles
San Gabriel Mountians: Lytle Creek Canyon
915
Comment Read comments Aug 18 2012
RSA48849
Artemisia tridentata subsp. parishii
J. C. Roos
1949-11-27
4704
Los Angeles
Flats 4 miles east of Palmdale.
823
Comment
RSA48852
Artemisia tridentata subsp. parishii
J. C. Roos
1949-11-24
4699
Los Angeles
8 or 9 miles W of Lancaster.
732
Comment
RSA48855
Digitaria ischaemum
J. C. Roos
1949-10-19
4692
Los Angeles
San Gabriel.
122
Comment
RSA49009
Lepidium virginicum var. robinsonii
J. C. Roos
1950-2-14
4706
Los Angeles
Between Rinehart St. and Prospect Park, Los Angeles
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
RSA591764
Atriplex argentea subsp. expansa
J. C. Roos
1947-7-21
s.n.
Los Angeles
Lancaster.
Comment
RSA648068
Agrostis pallens
J. C. Roos
1939-6-8
s.n.
Los Angeles
Canyon in hills N. of Burbank.
Comment Read comments Feb 3 2011
RSA648083
Achnatherum occidentale subsp. occidentale
J. C. Roos
1937-7-18
398
Los Angeles
Mt. Wilson Observatory.
Comment
RSA648671
Melica stricta
J. C. Roos
1937-5-31
611
Los Angeles
Big Pines.
Comment
RSA658345
Ribes malvaceum var. viridifolium
J. C. Roos
1966-2-11
s.n.
Los Angeles
Claremont.
Comment
RSA658859
Phacelia cicutaria var. hispida
J. C. Roos
1947-5-17
3627
Los Angeles
Placerita Canyon east of Newhall.
Comment
RSA659472
Clarkia unguiculata
J. C. Roos
1947-5-17
3626
Los Angeles
Placerita Canyon east of Newhall.
Comment
RSA78216
Ribes roezlii
J. C. Roos
1951-8-30
5077
Los Angeles
Big Rock Creek, north of Mt. Baden Powell, San Gabriel Mts.
1829
Comment
RSA78217
Agrostis exarata
J. C. Roos
1951-7-30
5076
Los Angeles
North slope Mt. Baden Powell, San Gabriel Mountains.
2043
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
RSA78228
Poa secunda
J. C. Roos
1951-5-27
5055
Los Angeles
flats between Lancaster and rosamond
701
Comment
RSA78378
Lepidospartum latisquamum
J. C. Roos
1951-7-30
5073
Los Angeles
Swartout Valley between Wrightwood and Big Pines
1982
Comment
RSA78379
Malacothamnus fremontii
J. C. Roos
1951-7-30
5072
Los Angeles
Big Rock Creek, San Gabriel Mts.
1677
Comment
RSA78380
Galium hallii
J. C. Roos
1951-7-30
5074
Los Angeles
Big Rock Creek, San Gabriel Mts.
1677
Comment
RSA89978
Digitaria ciliaris
J. C. Roos, A. R. Roos
1950-9-16
4989
Los Angeles
Los Angeles.
61
Comment
RSA89979
Chloris gayana
J. C. Roos, A. R. Roos
1950-9-16
4987
Los Angeles
Los Angeles.
61
Comment
UC1010238
Lepidospartum latisquamum
John C. Roos
1951-7-30
5073
Los Angeles
Swartout Valley between Wrightwood and Big Pines; San Gabriel Mts., Swartout Valley between Wrightwood and Big
1981
Comment
UC1010241
Ribes divaricatum var. parishii
John and Lucille Roos
1951-3-10
5032
Los Angeles
Whittier Narrows San Gabriel River
60
Comment
UC1023388
Cyclospermum leptophyllum
John C. Roos
1951-8-1
5079
Los Angeles
Los Angeles; Overland, near Santa Monica Blvd
60
Comment
UC1023432
Digitaria ciliaris
J. C. and A. R. Roos
1950-9-16
4989
Los Angeles
1700 Westwood Blvd. Los Angeles
60
Comment
UCR18756
Lepidium nitidum
John C. Roos
1950-2-14
4706
Los Angeles
Los Angeles, Echandia St. between Rinehart St. and Prospect Park
104
Comment
UCR18888
Atriplex canescens
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
UCR18898
Atriplex polycarpa
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
UCR18945
Quercus lobata
John C. Roos
1946-11-23
3157
Los Angeles
Transverse Range, Placerita Canyon [in Santa Clarita]
Comment
UCR18978
Quercus engelmannii
John C. Roos
1946-10-12
3131
Los Angeles
Base of San Gabriel Mtns., Foothill Boulevard, west of Monrovia
Comment
UCR19000
Trifolium gracilentum
John C. Roos
1950-4-1
4720
Los Angeles
Los Angeles Basin Region, Los Angeles [West Los Angeles/ Westwood], hill just east of [Ralph Waldo] Emerson Junior High School [1650 Selby Ave.]
87
Comment
UCR19007
Spergularia villosa
John C. Roos
1950-4-1
4719
Los Angeles
Los Angeles Basin Region, Los Angeles [West Los Angeles/ Westwood], hill just east of [Ralph Waldo] Emerson Junior High School [1650 Selby Ave.]
87
Comment
UCR19018
Chloris gayana
John C. Roos, A. R. Roos
1950-9-16
4987
Los Angeles
Los Angeles, Santa Monica Blvd. at Midvale Ave.
61
Comment
UCR19034
Epilobium canum subsp. canum
John C. Roos
1941-10-11
866
Los Angeles
Western Transverse Range; Santa Monica Mtns., Mandeville Canyon
350
Comment
UCR19038
Collinsia callosa
John C. Roos
1937-5-31
2032
Los Angeles
San Gabriel Mtns., Below Big Pines
Comment
UCR19125
Petalonyx thurberi
Alfred R. Roos
1948-9-15
s.n.
Los Angeles
Transverse Range/Mojave Desert, Mint Canyon, south of Palmdale
Comment
UCR19173
Phacelia hubbyi
John C. Roos
1947-5-4
3603
Los Angeles
San Gabriel Valley, Kellogg Hill, in hills west of Pomona
305
Comment
UCR19475
Ambrosia trifida
John C. Roos
1937-9-7
s.n.
Los Angeles
San Fernando Valley, North Hollywood
Comment
UCR19499
Perityle emoryi
John C. Roos
1948-8-26
s.n.
Los Angeles
South Coast, Malibu
6
Comment
UCR19660
Paspalum dilatatum
John C. Roos
1947-5-11
3605
Los Angeles
Los Angeles; lawn in Hollenbeck Park
91
Comment
UCR21045
Eragrostis pectinacea var. pectinacea
John C. Roos
1940-9-6
s.n.
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR23349
Aspidotis californica
John C. Roos
1942-3-21
1094
Los Angeles
San Gabriel Mtns, Santa Anita Canyon
244
Comment
UCR23350
Dryopteris arguta
John C. Roos
1942-3-21
1099
Los Angeles
San Gabriel Mtns, Santa Anita Canyon
244
Comment
UCR23352
Adiantum jordanii
John C. Roos
1942-4-18
1084
Los Angeles
Transverse Range; San Gabriel Mtns., East Fork of Santa Anita Canyon
Comment
UCR23357
Azolla filiculoides
John C. Roos
1942-3-7
1009
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR23361
Pellaea mucronata
John C. Roos
1942-3-7
1000
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR23368
Pinus attenuata
John C. Roos
1942-4-18
1049
Los Angeles
San Gabriel Mtns, ridge c. 3 mi south of Charlton Flats, Angeles Crest Hwy
Comment
UCR23372
Pinus ponderosa
John C. Roos
1947-5-31
3669
Los Angeles
San Gabriel Mountains, Big Pines
2134
Comment
UCR23392
Cyclospermum leptophyllum
John C. Roos, A. R. Roos
1958-5-16
s.n.
Los Angeles
Los Angeles, lawn of Ambassador Hotel, 3400 Wilshire Blvd.
67
Comment
UCR23420
Amaranthus palmeri
Alfred R. Roos
1945-10-23
s.n.
Los Angeles
San Fernando Valley, [Mission Hills], Sepulveda & Devonshire Blvds.
Comment
UCR23433
Sisymbrium orientale
John C. Roos
1954-4-30
s.n.
Los Angeles
Los Angeles, along a parking strip at Boyle St, and New Jersey St.
104
Comment
UCR23451
Ceanothus oliganthus
John C. Roos
1942-3-21
1097
Los Angeles
San Gabriel Mtns, Santa Anita Canyon
244
Comment
UCR23452
Ceanothus megacarpus
John C. Roos
1942-6-21
996
Los Angeles
Western Transverse Range; Santa Monica Mtns., mouth of Mandeville Canyon
152
Comment
UCR23463
Alchemilla arvensis
John C. Roos
1965-3-13
s.n.
Los Angeles
San Gabriel Valley, Huntington Gardens, San Marino
213
Comment
UCR23469
Oenothera rosea
Alfred R. Roos
1958-6-17
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR23483
Descurainia sophia
Alfred R. Roos
1954-5-4
s.n.
Los Angeles
San Fernando Valley, 5001 Gaviota, Encino
218
Comment
UCR23519
Clarkia unguiculata
John C. Roos
1942-6-6
989
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR23521
Orobanche bulbosa
John C. Roos
1942-6-6
1065
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR23522
Clarkia cylindrica
John C. Roos
1942-6-6
988
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR23542
Ceanothus spinosus
John C. Roos
1942-3-14
997
Los Angeles
Western Transverse Range; Santa Monica Mtns., Sepulveda Canyon, West Los Angeles
350
Comment
UCR23551
Cardamine debilis
Alfred R. Roos
1958-6-12
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR23555
Brassica rapa
John C. Roos
1941-2-17
s.n.
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR23573
Sarcodes sanguinea
John C. Roos
1966-6-15
s.n.
Los Angeles
San Gabriel Mountains, North slope of Mt. Baden-Powell near Lamel Spring
2378
Comment Read comments Aug 18 2012
UCR23589
Cryptantha microstachys
John C. Roos
1942-5-23
1066
Los Angeles
San Gabriel Mtns., Santa Anita Canyon
Comment
UCR23597
Euphorbia albomarginata
John C. Roos
1942-9-26
1728
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR23599
Malacothamnus davidsonii
John C. Roos
1942-3-7
1001
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR23608
Datisca glomerata
John C. Roos
1942-6-6
986
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR23616
Mentzelia laevicaulis
John C. Roos
1942-9-12
1740
Los Angeles
Monrovia
165
Comment
UCR23642
Arbutus menziesii
John C. Roos
1942-3-21
1095
Los Angeles
San Gabriel Mtns, Santa Anita Canyon
244
Comment
UCR23663
Polycarpon tetraphyllum
Alfred R. Roos
1958-5-2
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR23668
Geranium robertianum
Alfred R. Roos
1958-6-3
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment Read comments Apr 11 2012
UCR23685
Triodanis biflora
John C. Roos
1942-5-23
1068
Los Angeles
San Gabriel Mtns., Santa Anita Canyon
Comment
UCR23699
Erodium moschatum
John C. Roos
1943-3-7
2642
Los Angeles
Santa Monica, near Sawtell
Comment
UCR23713
Polycarpon tetraphyllum
John C. Roos
1942-5-23
1061
Los Angeles
Monrovia, 300 block on E Lime St.
179
Comment
UCR23727
Cotula australis
John C. Roos
1942-2-28
1004
Los Angeles
San Gabriel Valley, Pomona, 737 East Phillips St.
250
Comment
UCR23738
Chaenactis santolinoides
John C. Roos
1947-5-31
3667
Los Angeles
San Gabriel Mountains, Big Pines
2134
Comment
UCR23790
Galinsoga parviflora
Alfred R. Roos
1947-10-12
s.n.
Los Angeles
West Los Angeles
Comment
UCR23819
Hedypnois cretica
Alfred R. Roos
1954-5-17
s.n.
Los Angeles
Hollywood, near North Kenmore & Oakdale [=Oakwood?] Streets
91
Comment
UCR23838
Lessingia filaginifolia
John C. Roos
1942-9-12
1719
Los Angeles
City of Los Angeles, Westwood Village
Comment
UCR23847
Trifolium dubium
Alfred R. Roos
1954-5-29
s.n.
Los Angeles
Hollywood
Comment
UCR23851
Medicago lupulina
John C. Roos
1954-5-31
s.n.
Los Angeles
Hollywood parking lot, Los Angeles
Comment
UCR23863
Quercus agrifolia
Alfred R. Roos
1937-12-15
s.n.
Los Angeles
Western Transverse Range; Santa Monica Mtns., Sepulveda Canyon
350
Comment
UCR23894
Melilotus albus
John C. Roos
1942-9-26
1729
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR23897
Ericameria ericoides
John C. Roos
1942-10-10
1723
Los Angeles
UCLA, Los Angeles
Comment
UCR23905
Glycyrrhiza lepidota
John C. Roos
1942-6-6
1064
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR23931
Lupinus microcarpus
John C. Roos
1942-6-6
1063
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR24015
Phalaris canariensis
Alfred R. Roos
1958-5-21
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR24046
Eleusine indica
John C. Roos
1942-10-1
1735
Los Angeles
Los Angeles, North Boyle and Bridge Street
Comment
UCR24086
Melica stricta
John C. Roos
1947-5-31
3665
Los Angeles
San Gabriel Mtns., near Jackson Lake
1829
Comment
UCR24093
Atriplex semibaccata
John C. Roos
1937-9-7
s.n.
Los Angeles
Westwood Village, Los Angeles
90
Comment
UCR24118
Atriplex lentiformis subsp. breweri
John C. Roos
1942-9-12
1724
Los Angeles
South Coast/Santa Monica Mtns., northwest of Santa Monica
30
Comment
UCR24119
Atriplex nummularia
John C. Roos
1937-9-2
2555
Los Angeles
Playa del Rey
Comment
UCR24154
Venegasia carpesioides
John C. Roos
1942-3-14
998
Los Angeles
Western Transverse Range; Santa Monica Mtns., Sepulveda Canyon, West Los Angeles
350
Comment
UCR24170
Soliva sessilis
Alfred R. Roos
1958-5-16
s.n.
Los Angeles
City of Los Angeles, lawn of the Ambassador Hotel, [3400] Wilshire Blvd.
69
Comment
UCR24175
Dudleya cymosa subsp. minor
John C. Roos
1942-5-23
1062
Los Angeles
San Gabriel Mtns., Near Chantry Flats
671
Comment
UCR24177
Cornus sericea subsp. sericea
John C. Roos
1947-5-31
3666
Los Angeles
San Gabriel Mtns., near Jackson Lake
1829
Comment
UCR24178
Cornus sericea subsp. occidentalis
John C. Roos
1950-7-15
4851
Los Angeles
San Gabriel Valley, Whittier Narrows, San Gabriel River bed near Whittier
61
Comment Read comments Feb 18 2013
UCR24186
Atriplex parryi
John C. Roos
1947-7-21
s.n.
Los Angeles
Western Mojave Desert, Lancaster
762
Comment
UCR24188
Potamogeton crispus
John C. Roos
1950-7-15
4852
Los Angeles
San Gabriel Valley, Whittier Narrows, San Gabriel River bed near Whittier
61
Comment
UCR24209
Kochia californica
John C. Roos
1947-9-18
2790
Los Angeles
Western Mojave Desert, 2 mi north of Lancaster
710
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
UCR24283
Rumex conglomeratus
John C. Roos
1942-9-12
1743
Los Angeles
Along the coast NW of Santa Monica
Comment
UCR24288
Pterostegia drymarioides
John C. Roos
1942-5-23
1067
Los Angeles
Transverse Range; San Gabriel Mtns., Chantry Flats, Santa Anita Canyon
Comment
UCR24291
Stipa lepida
Alfred R. Roos
1943-6-13
s.n.
Los Angeles
Westwood Hills
Comment
UCR24293
Stipa cernua
John C. Roos
1945-3-14
s.n.
Los Angeles
Los Angeles, Olympic Blvd., west of Fox Studios
Comment
UCR24303
Stipa speciosa
John C. Roos
1942-3-7
1003
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR24308
Meconella denticulata
John C. Roos
1942-5-23
1069
Los Angeles
San Gabriel Mtns., Santa Anita Canyon
Comment
UCR24317
Suaeda taxifolia
John C. Roos
1942-9-12
1741
Los Angeles
South Coast/Santa Monica Mtns., northwest of Santa Monica
30
Comment
UCR24330
Allophyllum gilioides
John C. Roos
1942-5-23
1058
Los Angeles
San Gabriel Mtns., Santa Anita Canyon
Comment
UCR24339
Ribes divaricatum var. parishii
John C. Roos, L. Roos
1951-3-10
5032
Los Angeles
San Gabriel River at Whittier Narrows
61
Comment
UCR24340
Ribes divaricatum var. parishii
John C. Roos, L. Roos
1950-7-15
4850
Los Angeles
San Gabriel Valley, Whittier Narrows, San Gabriel River bed near Whittier
61
Comment
UCR24341
Artemisia tridentata
John C. Roos
1937-8-11
2527
Los Angeles
Newhall
Comment
UCR24357
Ambrosia confertiflora
John C. Roos
1942-10-10
1722
Los Angeles
Westwood Village, Malcolm Ave. and Santa Monica Blvd.
98
Comment
UCR24361
Ambrosia psilostachya
John C. Roos
1942-9-28
1716
Los Angeles
Beverly Blvd., Los Angeles
122
Comment
UCR24369
Anisocoma acaulis
John C. Roos, L. Roos
1952-5-17
5678
Los Angeles
Mojave Desert, 15 mi west of Adelanto [near the San Bernardino Co. line]
917
Comment
UCR24370
Stipa coronata
John C. Roos
1942-3-7
1002
Los Angeles
San Gabriel Mtns., Big Tujunga Canyon
457
Comment
UCR24391
Ribes amarum
John C. Roos
1942-4-18
1085
Los Angeles
Transverse Range; San Gabriel Mtns., East Fork of Santa Anita Canyon
Comment
UCR24395
Lithophragma heterophyllum
John C. Roos
1942-4-18
1082
Los Angeles
Transverse Range; San Gabriel Mtns., East Fork of Santa Anita Canyon
Comment
UCR24421
Ribes californicum var. hesperium
John C. Roos
1944-2-5
2765
Los Angeles
Western Transverse Range; Santa Monica Mtns., Mandeville Canyon, West Los Angeles
350
Comment
UCR24490
Penstemon heterophyllus
John C. Roos
1942-6-6
984
Los Angeles
Western Transverse Range, Placerita Canyon near Newhall
610
Comment
UCR25063
Muhlenbergia rigens
Alfred R. Roos
1937-7-18
5212
Los Angeles
San Gabriel Mtns., Mt. Wilson grade
Comment
UCR25092
Eragrostis mexicana subsp. virescens
Alfred R. Roos
1939-6-8
7381
Los Angeles
Burbank, N. Hollywood
Comment
UCR25115
Poa secunda
John C. Roos, L. Roos
1951-5-27
5055
Los Angeles
Mojave Desert, flats between Lancaster and Rosamond
701
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
UCR25127
Cyclospermum leptophyllum
John C. Roos
1951-8-1
5079
Los Angeles
Los Angeles, [near Westwood Village] Overland Ave. near Santa Monica Blvd.
61
Comment
UCR25130
Agrostis exarata
John C. Roos
1951-7-30
5076
Los Angeles
San Gabriel Mtns., North slope of Mt. Baden Powell
2043
Comment
UCR25131
Galium hallii
John C. Roos
1951-7-30
5074
Los Angeles
San Gabriel Mtns., Big Rock Creek, north of Mt. Baden Powell
1982
Comment
UCR25179
Lepidospartum latisquamum
John C. Roos
1951-7-30
5073
Los Angeles
San Gabriel Mtns., Swarthout Valley between Wrightwood and Big Pines
1982
Comment
UCR25180
Ribes roezlii var. roezlii
John C. Roos
1951-8-30
5077
Los Angeles
San Gabriel Mtns, Big Rock Creek north of Mt. Baden-Powell
1829
Comment
UCR25181
Malacothamnus fremontii
John C. Roos
1951-7-30
5072
Los Angeles
San Gabriel Mtns., Big Rock Creek, north of Mt. Baden Powell
1982
Comment
UCR25289
Plantago virginica
Alfred R. Roos
1954-6-3
s.n.
Los Angeles
Los Angeles Basin, Parking strip at Oakwood and N. New Hampshire Streets, Hollywood
Comment
UCR25332
Nothoscordum gracile
Alfred R. Roos
1958-5-2
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR25466
Agrostis stolonifera
John C. Roos
1950-9-16
4988
Los Angeles
Los Angeles, Santa Monica Blvd. at Midvale Ave.
61
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
UCR25949
Lepidium pinnatifidum
John C. Roos
1956-6-15
s.n.
Los Angeles
Santa Monica Blvd., along RR tracks between Westwood and Beverly Glen Blvds.
90
Comment
UCR26069
Agoseris heterophylla
John C. Roos
1937-3-17
2458
Los Angeles
San Fernando Valley
305
Comment
UCR26136
Gutierrezia microcephala
John C. Roos, Mrs. S. A. Crooks
1946-8-20
2928
Los Angeles
San Gabriel Mtns., Big Rock Springs
1341
Comment
UCR26140
Ericameria pinifolia
John C. Roos
1937-2-23
2481
Los Angeles
San Gabriel Valley, Claremont
Comment
UCR26144
Geranium robertianum
Alfred R. Roos
1958-6-3
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles
Comment
UCR26171
Camissonia cheiranthifolia
Alfred R. Roos
1956-5-22
s.n.
Los Angeles
South Coast, sand dunes in El Segundo, near Hyperion
9
Comment
UCR26205
Prunus virginiana
John C. Roos
1947-5-31
3659
Los Angeles
San Gabriel Mountains, Big Pines
2134
Comment
UCR26221
Salvia leucophylla
John C. Roos
1947-5-17
3630
Los Angeles
Placerita Canyon, east of Newhall
Comment
UCR26244
Frasera neglecta
John C. Roos
1937-5-31
2037
Los Angeles
San Gabriel Mtns., Big Pines
2195
Comment
UCR26254
Asclepias californica
John C. Roos
1937-5-31
742
Los Angeles
southern Mojave Desert, near Littlerock
Comment
UCR26255
Mentzelia congesta
John C. Roos
1937-5-31
547
Los Angeles
San Gabriel Mtns., Big Pines
2195
Comment
UCR27414
Antirrhinum multiflorum
John C. Roos
1947-5-17
3636
Los Angeles
Placerita Canyon, east of Newhall
Comment
UCR27496
Linanthus breviculus
John C. Roos
1947-5-3
3654
Los Angeles
San Gabriel Mtns, Big Pines
1890
Comment
UCR27547
Symphoricarpos parishii
John C. Roos
1947-5-31
3662
Los Angeles
San Gabriel Mtns., near Jackson Lake
1829
Comment
UCR27596
Silene gallica
Alfred R. Roos
1956-5-22
s.n.
Los Angeles
South Coast, Sepulveda Blvd., [City of] El Segundo
30
Comment
UCR30557
Holodiscus microphyllus
John C. Roos
1937-7-16
2426
Los Angeles
San Gabriel Mtns., Baldy Peak
Comment
UCR34455
Coreopsis bigelovii
John C. Roos
1937-3-25
2482
Los Angeles
Western Mojave Desert, between Lancaster & Ridge Route, west of Lancaster
Comment
UCSB37845
Poa secunda subsp. juncifolia
Roos, John; Roos, Lucille
1951-5-27
Los Angeles
Flats between Lancaster and Rosamond, Mojave Desert
701
Comment
UCSB38060
Ribes malvaceum var. viridifolium
Roos, John
1966-2-11
Los Angeles
Claremont; In a canyon with Quercus agrifolia
304
Comment
UCSB38061
Ribes californicum var. hesperium
Roos, J.
1966-2-4
Los Angeles
Claremont
Comment
UCSB40901
Agrostis pallens
Roos, John
1939-6-8
Los Angeles
Canyon in hills N of Burbank
Comment
UCSB40903
Muhlenbergia californica
Roos, John
1951-7-30
Los Angeles
Big Rock Creek; north of Mt. Baden Powell
1981
Comment
UCSB41546
Ribes divaricatum var. parishii
Roos, John; Roos, Lucille
1951-3-10
Los Angeles
San Gabriel River at Whittier Narrows
60
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
UCSB45539
Poa secunda subsp. juncifolia
John C. Roos and Lucille Roos
1951-5-27
5055
Los Angeles
collected between Lancaster and Rosamond in then Mojave Desert Lancaster, Rosamond
Comment
UCSB49607
Lepidospartum latisquamum
Roos, John
1951-7-30
Los Angeles
Swartout Valley between Wrightwood and Big Pines, San Gabriel Mts.
1981
Comment
CAS-BOT-BC306296
Hedypnois cretica
A. R. Roos
1954-5-17
s.n.
Los Angeles
Near North Kenmore and Oakdale Streets, Hollywood
91
Comment
CAS-BOT-BC306297
Hedypnois cretica
A. R. Roos
1954-5-17
s.n.
Los Angeles
Near North Kenmore and Oakdale Streets, Hollywood
91
Comment
CAS-BOT-BC365844
Soliva sessilis
A. R. Roos
1958-5-16
s.n.
Los Angeles
On the lawn of the Ambassador Hotel, Wilshire Blvd., Los Angeles
Comment
CAS-BOT-BC37899
Cardamine oligosperma
A. R. Roos
1958-6-12
s.n.
Los Angeles
Evans & Reeves Nursery, Brentwood. West Los Angeles.
Comment
CAS-BOT-BC43493
Descurainia sophia
A. R. Roos
1954-5-4
s.n.
Los Angeles
5001 Gaviota, Encino.
Comment
CLARK-A1528-1305
Erodium botrys
John C. Roos
1943-3-27
2622
Los Angeles
West Los Angeles
0
Comment
CLARK-A1528-1415
Rhus laurina
John C. Roos
1937-7-19
2419
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-1423
Apium leptophyllum
John C. Roos, Alfred R. Roos
1958-5-16
Los Angeles
Los Angeles
Comment
CLARK-A1528-1425
Apium leptophyllum
Alfred R. Roos
1958-5-29
Los Angeles
parking strip on the 1900 block of Westwood Blvd.
Comment Read comments Oct 26 2015
CLARK-A1528-1426
Apium leptophyllum
John C. Roos
1937-4-21
Los Angeles
Claremont
Comment
CLARK-A1528-1519
Bloomeria crocea
John C. Roos
1947-5-11
3606
Los Angeles
Pomona
Comment
CLARK-A1528-1544
Ambrosia trifida
John C. Roos
1937-9-7
Los Angeles
North Hollywood
Comment
CLARK-A1528-1547
Anisocoma acaulis
John C. Roos
1952-5-17
5678
Los Angeles
Mojave Desert
914
Comment
CLARK-A1528-1598
Artemisia tridentata
John C. Roos
1941-10-4
862
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-1713
Chrysothamnus nauseosus subsp. bernardinus
John C. Roos
1941-10-4
863
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-1762
Chrysanthemum carinatum
Alfred R. Roos
1955-5-7
Los Angeles
El Segundo
Comment
CLARK-A1528-1763
Chrysanthemum coronarium
Alfred R. Roos
1955-5-7
Los Angeles
El Segundo
Comment
CLARK-A1528-1791
Cotula australis
John C. Roos
1942-2-28
1004
Los Angeles
Pomona
Comment
CLARK-A1528-1935
Hedypnois cretica
Alfred R. Roos
1954-5-17
Los Angeles
Hollywood
91
Comment
CLARK-A1528-2049
Chrysanthemum carinatum
Alfred R. Roos
1956-5-23
Los Angeles
El Segundo
Comment
CLARK-A1528-2050
Chrysanthemum coronarium
Alfred R. Roos
1956-5-22
Los Angeles
El Segundo
Comment
CLARK-A1528-2102
Soliva sessilis
Alfred R. Roos
1958-5-16
Los Angeles
Comment
CLARK-A1528-2158
Haplopappus parishii
John C. Roos
1941-10-4
864
Los Angeles
San Gabriel Mountains
1219
Comment
CLARK-A1528-2279
Clytostoma callistegioides
John C. Roos
1960-4-14
Los Angeles
North Hollywood
Comment
CLARK-A1528-2299
Brassica rapa subsp. sylvestris
John C. Roos
1943-2-7
Los Angeles
West Los Angeles
Comment
CLARK-A1528-2309
Descurainia sophia
Alfred R. Roos
1954-5-4
Los Angeles
Encino
Comment
CLARK-A1528-2437
Coronopus didymus
John C. Roos
1957-5-20
6611
Los Angeles
Los Angeles
Comment
CLARK-A1528-2457
Polycarpon tetraphyllum
John C. Roos
1941-8-1
80
Los Angeles
Santa Monica
Comment
CLARK-A1528-2465
Silene laciniata
John C. Roos
1947-5-17
3635
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-2505
Atriplex semibaccata
John C. Roos
1942-9-5
1725
Los Angeles
Los Angeles
Comment
CLARK-A1528-2525
Atriplex lentiformis subsp. breweri
John C. Roos
1948-9-15
Los Angeles
Santa Monica
Comment
CLARK-A1528-2556
Chenopodium ambrosioides
John C. Roos
1942-9-16
1726
Los Angeles
Comment
CLARK-A1528-2567
Chenopodium multifidum
John C. Roos
1937-7-19
1159
Los Angeles
Pasadena
Comment
CLARK-A1528-2568
Chenopodium pumilio
John C. Roos
1937-7-7
1769
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-2569
Chenopodium pumilio
John C. Roos
1942-6-17
1276
Los Angeles
West Los Angeles
Comment
CLARK-A1528-2577
Cycloloma atriplicifolium
John C. Roos
1937-9-29
Los Angeles
El Monte
Comment
CLARK-A1528-2584
Kochia californica
John C. Roos
1947-9-18
2790
Los Angeles
Lancaster
Comment
CLARK-A1528-2782
Glycyrrhiza lepidota
John C. Roos
1947-5-17
3637
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-2783
Hoffmannseggia densiflora
John C. Roos
1947-5-11
3607
Los Angeles
Monterey Park
Comment
CLARK-A1528-2811
Lotus subpinnatus
John C. Roos
1937-3-25
1686
Los Angeles
Comment
CLARK-A1528-2857
Medicago lupulina
John C. Roos
1954-5-31
Los Angeles
Hollywood
Comment
CLARK-A1528-2878
Trifolium dubium
Alfred R. Roos
1954-5-29
Los Angeles
Los Angeles
Comment
CLARK-A1528-2880
Trifolium gracilentum
John C. Roos
1950-4-1
4720
Los Angeles
Comment
CLARK-A1528-2910
Quercus wislizeni var. frutescens
John C. Roos
1941-10-4
865
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-2958
Erodium moschatum
John C. Roos
1943-3-7
2642
Los Angeles
Santa Monica
Comment
CLARK-A1528-2996
Phacelia cicutaria
John C. Roos
1947-5-17
3627
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-2997
Phacelia cicutaria subsp. hispida
John C. Roos
1947-5-4
3603
Los Angeles
Pomona
Comment
CLARK-A1528-3896
Ceanothus oliganthus
John C. Roos
1942-3-21
1097
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-3897
Ceanothus oliganthus
John C. Roos
1942-3-7
1106
Los Angeles
La Canada
Comment
CLARK-A1528-3976
Cercocarpus betuloides
John C. Roos
1942-3-7
1104
Los Angeles
San Gabriel Mountains
Comment
CLARK-A1528-4868
Descurainia pinnata
John C. Roos
1937-3-9
1391
Los Angeles
Claremont
Comment
CLARK-A1528-4887
Phacelia imbricata
John C. Roos
1947-5-17
3628
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-4893
Cuscuta californica
John C. Roos
1937-9-2
644
Los Angeles
Manhattan Beach
Comment
CLARK-A1528-4894
Chenopodium pumilio
John C. Roos
1942-6-17
1276
Los Angeles
West Los Angeles
Comment
CLARK-A1528-4939
Lomatium utriculatum
John C. Roos
1937-3-25
1676
Los Angeles
Lancaster
Comment
CLARK-A1528-4963
Lepidium nitidum
John C. Roos
1950-2-14
4706
Los Angeles
Comment
CLARK-A1528-5018
Spergularia villosa
John C. Roos
1950-4-1
4719
Los Angeles
60
Comment
CLARK-A1528-5432
Erodium botrys
John C. Roos
1943-3-27
2622
Los Angeles
West Los Angeles
0
Comment
CLARK-A1528-5434
Phacelia cicutaria
John C. Roos
1947-5-17
3627
Los Angeles
Placerita Canyon
Comment
CLARK-A1528-5618
Galinsoga parviflora
John C. Roos
1947-7-16
3528
Los Angeles
West Covina
Comment
CLARK-A1528-5627
Chrysanthemum coronarium
Alfred R. Roos
1955-5-7
Los Angeles
El Segundo
Comment
CLARK-A1528-5649
Spergularia villosa
John C. Roos
1950-4-1
4719
Los Angeles
60
Comment
CLARK-A1528-5652
Bassia hyssopifolia
John C. Roos
1937-6-29
Los Angeles
Malibu Beach
Comment
HSC78509
Hedypnois cretica
A. R. Roos
1954-5-17
Los Angeles
Hollywood, near North Kenmore & Oakdale Streets.
91
Comment
OBI32732
Geranium robertianum
A. R. Roos
1958-6-3
s.n.
Los Angeles
Evans-Reserve Nursery, Brentwood, W Los Angeles
Comment
OBI33605
Hedypnois rhagadioloides
A. R. Roos
1954-5-17
s.n.
Los Angeles
Near N Kenmore and Oakdale Sts, Hollywood
91
Comment
POM262932
Eriogonum saxatile
J. C. Roos
1937-7-17
391
Los Angeles
San Gabriel Mountains: trail to Telegraph Peak
2591
Comment
POM263027
Verbascum virgatum
J. C. Roos
1939-6-5
724
Los Angeles
Footlhill Blve., north of San Dimas.
Comment
POM263275
Phacelia viscida
J. C. Roos
1937-7-7
404
Los Angeles
On earth fill, La Crescenta
Comment
POM263281
Mentzelia veatchiana
J. C. Roos
1937-3-25
543
Los Angeles
12 miles west of Lancaster
Comment
POM263331
Trifolium repens
J. C. Roos
1937-7-18
402
Los Angeles
Near Currys Camp Baldy, San Antonio Canyon. Between Los Angeles and San Bernardino County.
Comment
POM263547
Phacelia fremontii
J. C. Roos
1937-3-25
680
Los Angeles
20 miles E of Palmdale
Comment
POM264166
Cuscuta californica
J. C. Roos
1937-9-2
644
Los Angeles
Manhattan Beach.
Comment
POM264310
Phacelia lemmonii
J. C. Roos
1937-5-31
675
Los Angeles
Creek bed on S side of Mojave Desert, above Valyermo
Comment
POM264466
Cuscuta californica
J. C. Roos
1937-9-2
644
Los Angeles
Manhattan Beach.
Comment
POM265639
Amaranthus spinosus
J. C. Roos
1937-11-1
2282
Los Angeles
Van Nuys
Comment
POM265641
Mollugo verticillata
J. C. Roos
1939-6-22
920
Los Angeles
East Walnut and Foothill Extension, Pasadena
Comment
POM265648
Polycarpon tetraphyllum
J. C. Roos
1942-5-23
1061
Los Angeles
300 block on East-Lime St. Monrovia.
Comment
POM265685
Melilotus albus
J. C. Roos
1942-9-26
1729
Los Angeles
Westwood Village, Los Angeles.
Comment
POM265696
Datisca glomerata
J. C. Roos
1942-6-6
986
Los Angeles
Placerita Canyon
Comment
POM265698
Rumex salicifolius var. crassus
J. C. Roos
1942-9-12
1743
Los Angeles
Northwest of Santa Monica.
Comment
POM265701
Rumex crispus
J. C. Roos
1942-10-19
2570
Los Angeles
On vacant lot, West Los Angeles.
Comment
POM265709
Chenopodium ambrosioides
J. C. Roos
1942-9-16
1726
Los Angeles
Alameda and Vernon Sts., Los Angeles.
Comment
POM265711
Chenopodium pumilio
J. C. Roos
1942-6-17
1276
Los Angeles
Garden, mouth of Mandeville Canyon.
Comment
POM265716
Atriplex lentiformis subsp. breweri
J. C. Roos
1942-9-12
1724
Los Angeles
Northwest of Santa Monica.
Comment
POM265801
Malvella leprosa
J. C. Roos
1942-9-5
1744
Los Angeles
Westwood Village
Comment
POM266291
Conyza canadensis
J. C. Roos
1942-9-26
1712
Los Angeles
Westwood Village, Los Angeles.
Comment
POM266299
Ambrosia psilostachya
J. C. Roos
1942-9-28
1716
Los Angeles
Beverly Blvd. Los Angeles
Comment
POM266300
Ambrosia acanthicarpa
J. C. Roos
1942-9-19
1711
Los Angeles
West Los Angeles.
Comment
POM266305
Bidens pilosa
J. C. Roos
1942-9-12
1721
Los Angeles
parkways, Santa Monica
Comment
POM266319
Matricaria matricarioides
J. C. Roos
1942-3-23
1089
Los Angeles
Zonal St.
Comment
POM266382
Agoseris heterophylla var. heterophylla
J. C. Roos
1937-3-17
2458
Los Angeles
San Fernando Valley.
Comment
POM266486
Azolla filiculoides
J. C. Roos
1942-3-7
1009
Los Angeles
Big Tujunga Canyon, west end of San Gabriel Mountains
Comment
POM301486
Plantago hirtella
J. C. Roos
1942-7-8
1273
Los Angeles
Michigan and Boyle Station.
Comment
POM301539
Physalis pubescens var. grisea
J. C. Roos
1942-8-26
1749
Los Angeles
San Gabriel, Tri-city Sewage Disposal Plant.
Comment
POM301607
Nemacladus sigmoideus
J. C. Roos
1796
Los Angeles
Mojave Desert, north of Adelanto.
Comment
POM301612
Triodanis biflora
J. C. Roos
1942-5-23
1068
Los Angeles
near Chantry Flats, Santa Anita Canyon.
Comment
POM302493
Erodium botrys
J. C. Roos
1943-3-27
2622
Los Angeles
Vacant lot, Westwood Village, Los Angeles.
Comment
POM361200
Polycarpon tetraphyllum
J. C. Roos
1941-4-1
80
Los Angeles
Santa Monica.
Comment
RSA0008286
Ribes divaricatum var. parishii
J. C. Roos
1951-3-10
5032
Los Angeles
San Gabriel River at Whittier Narrows.
61
Comment
RSA0011180
Juglans californica
J. C. Roos
1942-4-4
1078
Los Angeles
Sepulveda Canyon, West Los Angeles.
Comment
RSA0021113
Ribes lasianthum
J. C. Roos
1937-5-31
10
Los Angeles
Big Pines, near Jackson Lake.
Comment
RSA0038250
Trifolium dubium
A. R. Roos
1954-5-29
s.n.
Los Angeles
Hollywood parking lot.
Comment
RSA0039176
Thysanocarpus desertorum
J. C. Roos, L. Roos
1952-5-17
5681
Los Angeles
16 miles west of Adelanto, Mohave desert.
915
Comment
RSA0041650
Thysanocarpus desertorum
J. C. Roos, L. Roos
1952-5-17
5681
Los Angeles
16 miles west of Adelanto, Mohave desert.
915
Comment
RSA0049524
Cercocarpus betuloides
J. C. Roos
1942-3-7
1104
Los Angeles
Big Tujunga Canyon, San Gabriel Mtsn.
Comment
RSA0076175
Orobanche bulbosa
John C. Roos
1942-6-6
1065
Los Angeles
Placerita Canyon, near Newhall.
Comment
RSA0098388
Spergularia macrotheca
J. C. Roos
1937-6-29
1486
Los Angeles
Malibu Beach.
Comment
RSA0099310
Convolvulus althaeoides
J. C. Roos
1950-5-9
4793
Los Angeles
Behind 717 and 719 Echandia Street, Los Angeles.
91
Comment
RSA0104244
Kopsiopsis strobilacea
John C. Roos
1937-7-17
375
Los Angeles
Near Telegraph Peak, San Gabriel Mts.
Comment
RSA0115975
Cardamine flexuosa
A. R. Roos
1958-6-12
s.n.
Los Angeles
Evans & Revves nursery, Bentwood, West L.A.
Comment
RSA0116204
Cardamine flexuosa
A. R. Roos
1958-6-12
s.n.
Los Angeles
Evans & Revves nursery, Bentwood, West L.A.
Comment
RSA0116205
Cardamine flexuosa
A. R. Roos
1958-6-12
s.n
Los Angeles
Evans & Revves nursery, Bentwood, West L.A.
Comment
RSA113416
Chrysanthemum carinatum
J. C. Roos
1956-5-22
s.n.
Los Angeles
In El Segundo, near Hypericon.
9
Comment
RSA263149
Oxalis albicans subsp. pilosa
J. C. Roos
1937-9-2
520
Los Angeles
Hills behind Redondo Beach.
Comment
RSA264292
Phacelia fremontii
J. C. Roos
1937-5-31
668
Los Angeles
Wrightwood
Comment
RSA265793
Mentzelia laevicaulis
J. C. Roos
1942-9-24
1740
Los Angeles
Gravel wash, Monrovia.
Comment
RSA309653
Hedypnois cretica
A. R. Roos
1954-5-17
s.n.
Los Angeles
Hollywood, near North Kenmore & Oakdale Streets.
91
Comment
RSA443398
Phalaris canariensis
A. R. Roos
1958-5-21
s.n.
Los Angeles
Evans & Reeves Nursery, Brentwood, West Los Angeles
Comment
RSA449939
Soliva sessilis
A. R. Roos
1958-5-16
s.n.
Los Angeles
City of Los Angeles, lawn of the Ambassador Hotel, Wilshire Blvd.
Comment
RSA450236
Geranium robertianum
A. R. Roos
1958-6-3
s.n.
Los Angeles
Evans-Reeves Nursery, Brentwood, West Los Angeles.
Comment
RSA48696
Physalis pubescens var. grisea
J. C. Roos
1942-8-26
1749
Los Angeles
San Gabriel, Tri-city Sewage Disposal Plant.
Comment
RSA658435
Nothoscordum borbonicum
J. C. Roos
1958-3-2
s.n.
Los Angeles
Evans and Reeves Nursery. Brentwood, West Los Angeles.
Comment
RSA658696
Descurainia sophia
A. R. Roos
1954-4-12
6066
Los Angeles
5001 Gaviota Ave., Encino.
213
Comment
RSA659192
Geranium robertianum
A. R. Roos
1958-6-3
s.n.
Los Angeles
Evans-Reeves Nursery, Brentwood, West Los Angeles.
Comment
RSA659473
Camissonia cheiranthifolia
J. C. Roos
1956-5-22
s.n.
Los Angeles
In El Segundo, near Hypericon.
9
Comment
RSA659717
Hedypnois cretica
J. C. Roos
1954-5-17
s.n.
Los Angeles
North Kenmore and Oakdale Streets, Hollywood.
Comment
RSA659778
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
RSA662064
Cyclospermum leptophyllum
A. R. Roos
1958-3-29
s.n.
Los Angeles
A parking strip on the 1900 block of Westwood Blvd.
Comment
RSA662068
Trifolium dubium
A. R. Roos
1954-5-29
s.n.
Los Angeles
Hollywood parking lot.
Comment
RSA662411
Erodium botrys
J. C. Roos
1943-3-27
2622
Los Angeles
Vacant lot at Kelton and Massachuttes Ave s. West Los Angeles.
91
Comment
RSA662432
Descurainia sophia
A. R. Roos
1954-3-4
s.n.
Los Angeles
5001 Gaviota, Encino.
Comment
RSA85108
Medicago lupulina
J. C. Roos
1952-4-30
5604
Los Angeles
Edge of lawn, March Air Force Base
488
Comment
RSA92592
Glyptopleura setulosa
J. C. Roos
1952-5-17
5680
Los Angeles
16 miles W of Adelanto, Mojave Desert.
915
Comment
RSA92739
Tiquilia nuttallii
J. C. Roos
1952-5-17
5679
Los Angeles
16 miles W of Adelanto, Mojave Desert.
915
Comment
SD132378
Geranium robertianum
Alfred R. Roos
1958-6-3
Los Angeles
In lathhouses and elsewhere on the grounds of Evans and Reeves Nursery; Brentwood, West Los Angeles.
Comment
UC1506469
Hedypnois rhagadioloides
A. R. Roos
1954-5-17
Los Angeles
in roadside parking strips near North Kenmore and Oakdale Streets; Hollywood
91
Comment
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
UCD114528
Cardamine pensylvanica
A. R. Roos
1958-6-12
s.n.
Los Angeles
Evans and Reeves Nursery. Brentwood, in west Los Angeles.
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
UCD127351
Cyclospermum leptophyllum
A. R. Roos
1958-5-29
s.n.
Los Angeles
A parking strip on the 1900 block of Westwood Blvd.
Comment
UCD132673
Hedypnois cretica
A. R. Roos
1954-5-17
s.n.
Los Angeles
near North Kenmore and Oakdale Streets, Hollywood.
91
Comment
UCD138661
Nothoscordum gracile
A. R. Roos
1958-5-2
s.n.
Los Angeles
Evans and Reeves Nursery, Brentwood, West Los Angeles.
Comment
UCSB37381
Soliva sessilis
Roos, Alfred
1958-5-16
Los Angeles
Lawn of the Ambassador Hotel, Wilshire Blvd., Los Angeles
Comment
UCSB42121
Oenothera rosea
Roos, A.
1958-6-17
Los Angeles
Evans & Reeves Nursery; Brentwood; West Los Angeles
Comment
UCSB42182
Erodium cicutarium
Roos, Alfred
1958-6-3
Los Angeles
Evans-Reeves Nursery; Brentwood; West Los Angeles
Comment
UCSB42195
Trifolium dubium
Roos, Alfred
1954-5-29
Los Angeles
Hollywood parking lot
Comment
UCSB42209
Hedypnois cretica
Roos, Alfred
1954-5-17
Los Angeles
Near North Kenmore and Oakdale Streets, Hollywood
Comment
UCSB46755
Descurainia sophia
Roos, Alfred
1954-5-4
Los Angeles
5001 Gaviota, Encino
Comment
UCSB46756
Cardamine oligosperma
Roos, Alfred
1958-6-16
Los Angeles
Evans & Reeves Nursery, Brentwood, West Los Angeles
Comment