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Specimen number RSA585688
Determination Populus fremontii subsp. fremontii
More information: Jepson Online Interchange
Collector, number, date Tim S. Ross, Steve D. Boyd, Peter W. Fritsch, 3016, 1990-6-11
Verbatim date 1990-06-11
County Los Angeles
Locality Big Rock Creek: just above confluence of Holcomb Canyon Creek, between Big Rock Creek Road and mouth of Holcomb Canyon.
Elevation 1255m
HabitatRiparian area; bouldery alluvial benches dominated by mesophytic herbaceous perennials and scattered annuals, lower slopes and ridge dividing the two canyons vested in chaparral elements.
Coordinates 34.41680 -117.83843 BerkeleyMapper [or without layers, here]
Township/Range/Section04N09W20
DatumWGS84; ER = 200 m
Coordinate sourceGoogle Earth (copied from RSA584120)
Voucher information
other label numbers5f8ec57d-7c8a-4a8a-b3dc-d12856931947
verbatim elevation4115-4200
Annotations and/or
curatorial actions
Populus fremontii subsp. fremontii, Orlando Mistretta 2006-03
Notes<coords cont.: E1/2 NE1/4 SE1/4>; riparian area dominated by Salix laevigata, Platanus racemosa, Alnus rhombifolia, etc. with irregular openings along margina few anomalous trees occurring locally on W side of stream; leaves essentially glabrous, green (when fresh) and slightly bicolored (not yellow-green and concolorous as in P. fremontii). Pure Populus fremontii occurring lower down in the canyon; P. trichocarpa occurring farther up the canyon (as at Icy Springs). Stem excrescences probably due to a gall-forming parasitic insect.;
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