Rare Plants

Joshua National Park provides habitat protection for 44 plant species determined to be rare. Most of these rare plants are threatened beyond our boundaries by mining, off-road vehicle use, industrial scale solar development, and increasing urbanization throughout San Bernardino and Riverside counties.

Conservation Assessment for Parish's Daisy (Erigeron parishii, Asteraceae)

The purpose of this report is to provide a comprehensive review of the species biology, ecology, distribution, taxonomic history, conservation status, and to provide management recommendations for populations that occur within Joshua Tree National Park (JOTR) based on all known current information.
In addition we present original research investigating seed germination, reproductive biology, demographics, habitat preference and population genetics for E. parishii, with emphasis on plants that occur within JOTR.

Last updated: July 19, 2022

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