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Recent Topics Posters

Fraga, Naomi S. [1].

A Species Management Guide for San Antonio milkvetch Astragalus lentiginosus Douglas var. antonius Barneby and Linanthus concinnus Milliken on the Angeles National Forest.

The National Forest lands are recognized as a repository of biological diversity. As the importance of the National Forest's role in conserving biological diversity has grown in perceived value, so has the importance of developing conservation management tools. This is reflected in the longstanding partnership between the Angeles National Forest (ANF) and Rancho Santa Ana Botanic Garden (RSABG) in which species management guides have been produced for several Forest Sensitive plants since 1992. Species management guides fulfill the following objectives: (1) identify distribution and abundance of the subject species; (2) summarize existing biological information; (3) summarize existing and potential resource management conflicts; and (4) define management direction. The latest editions to the series of species management guides developed by RSABG and ANF address, Astragalus lentiginosus Douglas var. antonius Barneby (Fabaceae) and Linanthus concinnus Milliken (Polemoniaceae). These species are designated as rare by the California Native Plant Society (List 1B), as sensitive on the ANF, and are endemic to the San Gabriel Mountains, in southern California. Herbarium specimens, literature, and records from the California Department of Fish and Game Natural Diversity Data Base(CNDDB) were examined to identify historical occurrences. These species management guides were developed over a three-year period (2003-2005). In the first year all historic localities were visited, and for those where extant populations were found, information was gathered on habitat, associated species, abundance and potential threats. Photo-documentation and voucher specimens from each occurrence were collected. In the second year potential habitat was identified and surveyed based on information gathered from the 2003 surveys. In the third year the species management guides are completed, and will summarize the available information and knowledge concerning A. lentiginosus var. antonius and L. concinnus and identify the procedures needed to conserve and enhance these species.


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1 - Rancho Santa Ana Botanical Garden, 1500 North College Avenue, Claremont, California, 91711, USA

Keywords:
Astragalus
Linanthus
San Gabriel Mountains
rare plants
management
endemic
conservation
California.

Presentation Type: Recent Topics Poster
Session: 33-123
Location: Salon C, D & E - Gov Ballroom/Hilton
Date: Tuesday, August 16th, 2005
Time: 12:30 PM
Abstract ID:668


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