Ambrosia psilostachya DC.

The New York

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BOTANICAL

Qarde**,

RANCHO SANTA ANA BOTANIC GARDEN

Flora of Los Angeles County, California, USA
ASTERACEAE

Ambrosia psilostachya DC.

Liebre Mountains, Knapp Ranch area at upper end of Castaic Creek
drainage in broad alluvial valley at head of Cienaga Canyon, south
of Liebre Mountain. Near 34°40’57.2”N, 118°39’54.3”W. T7N
R17W W 1/2 NW 1/4 SE 1/4 sec. 22. Elevation ca 3000 - 3120
ft.

Broad alluvial valley grading gently to the SSE. Soils saturated
loam to sandy loam, water running on the surface in many areas.
Spring areas with overstory of Baccharis salicifolia, Salix
lasiolepis, S. laevigata, S. exigua, understory of dense stands of
Carex, Anemopsis californica, Juncus mexicana.

Perennial herb, locally common and forming dense colonies in drier
areas of meadow, often in association with open stands of Baccharis
salicifolia.

Steve Boyd 8926
Lauren Raz

24 Sep 1996

NEW YORK BOTANICAL GARDEN

01884233

01884233