Search Results — 581 specimen records retrieved (431 records with coordinates)
Results for search: County=LOS ANGELES; Source=All; Collector=Roos;   

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

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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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



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