Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 12 accessions of Limnanthes vinculans in orthodox seed collection. There are as many as 10015 seeds of this species in their collection - although some may have been used for curation testing or sent to back up.
Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 2 seed accessions of Limnanthes vinculans from 2 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants
Limnanthes vinculans is endemic to California and known from the Cotati Valley in Sonoma Co. This is a vernal pool species and its major threat is loss or degradation of habitat. Other threats to this species exist, however, habitat removal and alteration are the biggest threats. No protected EOs. Extirpated or historic at 8 sites.
More than 90% of the original vernal pool habitat has been destroyed by urbanization and agricultural development. Other threats include mowing, livestock grazing, off-road vehicle recreation, trash dumping and invasion of weedy, non-native plants.
Number of individuals is largely unknown, but the California Department of Fish and Game lists this species as declining. (CDFG 2002)
In 1993, Rancho Santa Ana Botanic Garden created 30 small vernal pools as part of their plant display as well as part of a long term gene flow study by the Garden's Research Department and Endangered Species Program. Artificial vernal pools have also been created by the University of California's Botanic Garden. Because these pools require careful tending it has been concluded that recreated pools are not self-sustaining and therefore not a viable option to replace the loss of naturally occurring vernal pools.
Under the terms of a settlement agreement approved Monday, July 23, 2001 by the U.S. District Court in Sacramento, the U.S. Fish and Wildlife Service (Service) will map critical habitat for 15 endangered and threatened species that are dependent on vernal pool wetlands in California. The critical habitat designation will add protection to California's remaining vernal pool habitat.
Population monitoring, reproductive/seed biology and general ecology of vernal pool dynamics would aid in the conservation of this and associated species.
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