U.S.A., California, Los Angeles, Flora of the Liebre Mountains. ÒCottonwood SwampÓ: Confluence of San Francisquito Canyon stream and two tributaries drainging off the southeast slops of Red Mountain. Warm Springs Mountain. 7.5Õ USGS Quadrangle.
T5N R15W S1 N/2 NE/4 SW/4.
512-515 meters Verbatim Elevation:
Broad marshy area. Dissected by San Francisquito Canyon Road.
Overstory dominated by Populus fremontii, Salix laevigata and S. lasiolepis. Locally commin in moist soil with Euthamica occidentalis, Typha, Scirpus microcarpus, etc.