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Abstract Detail


Systematics Section / ASPT

De Groot, Sarah [1].

A Whipple Mountains Flora.

The Sonoran and Mojave deserts meet just north of the Whipple Mountains, which are situated in southeast San Bernardino County, California, along the Colorado River and adjacent to Arizona. Vegetation from the Pleistocene to the present was inferred from previously published packrat midden data and the current floristic composition. Climate data suggest that summer rainfall is a factor underlying the vegetation differences between the western and eastern portions of the Sonoran desert. Plant collections in the area yielded primarily California Sonoran plants, but also several Mojave and Arizona Sonoran plants. A fair number of the Arizona Sonoran plants collected were on the western margins of their ranges. Three species new to California’s flora were documented in this study: Berberis harrisoniana Kearney & Peebles, Delphinium scaposum Greene, and Erigeron oxyphyllus Greene.


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1 - Rancho Santa Ana Botanic Garden, 1500 N. College Ave., Claremont, California, 91711, USA

Keywords:
Biogeography
Colorado River
Flora
Sonoran Desert.

Presentation Type: Oral Paper:Papers for Sections
Session: CP19
Location: PDR 2/Hilton
Date: Monday, July 9th, 2007
Time: 2:00 PM
Number: CP19004
Abstract ID:1052


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