Based on an September 2020 extract of the California Plant Rescue Database, California Botanic Garden holds 2 accessions of Swallenia alexandrae in orthodox seed collection. There are as many as 3171 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 1 seed accessions of Swallenia alexandrae from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass an unknown number of maternal plants
Endemic to Inyo County, California, Swallenia alexandrae is known from only five occurrences on the desert dunes in Death Valley National Park. Although vehicular traffic is prohibited, vehicular trespass and recreational campers still pose threats to this taxon. Its desert dune habitat is extremely fragile.
Since the 1960's, the Dunes have become a popular place for recreational four wheel driving (USFWS 1977). Although the Dunes were closed to vehicular activity in 1976, illegal activity continues. The spinning of wheels through the sand cuts grass rhizomes
Size and occurrences of populations are largely unknown.
Research by Pavlik and Barbour (1988) has shown that data for seed production, survivorship, seed bank and seed establishment may aid in designing a monitoring program for rare plants in Eureka Dunes, California. The authors found that the endemic populations of Swallenia, Oenothera and Astragalus at the dunes are not declining. Although the plant populations appear to be stable further study is warranted on the pollinator populations.
The primary objective of the Eureka Valley Dunes Recovery Plan is to protect the existing dunegrass and associated species from human threats. There is no plan for transplantation or other methods of propagation to support existing populations (USFWS 1983). The plan does call for adequate monitoring of remaining populations.
Population monitoring and understanding of reproductive biology is needed in order to aid conservation efforts.
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