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Eureka Valley Dune Grass
Swallenia alexandrae
About Eureka Valley Dune Grass (Swallenia alexandrae) 0 Nurseries Carry This Plant Swallenia is a rare genus of plants in the grass family, found only in Death Valley National Park, California. The only known species is Swallenia alexandrae, known by the common names Eureka dunegrass and Eureka Valley dune grass. This genus was named for American botanist Jason Richard Swallen (1903-1991). This is a rare plant endemic to Inyo County, California, where it is found on a single isolated dune system, the Eureka Valley Sand Dunes in the Eureka Valley of the Mojave Desert, within Death Valley National Park. Swallenia alexandrae is a coarse, tufted perennial grass which grows in sand from thick rhizomes. Its stiffly erect clums, sharp-leafed grass, and erect pale-colored panicle inflorescences are diagnostic. Endangered status. This is a federally listed endangered species of the United States, and an IUCN listed Critically endangered species. The main threat to the species survival has been off-roading, which is no longer permitted in its habitat. Trespassing off-roaders and campers are still a threat to the five remaining occurrences.
Plant Description
Plant Type
Plant Type

Flower Color
Flower Color

Landscaping Information
Natural Setting
Annual Precipitation: 4.4" - 6.3", Summer Precipitation: 0.45" - 1.07", Coldest Month: 42.9" - 48.2", Hottest Month: 67.9" - 79.5", Humidity: 5.88" - 34.48", Elevation: 2887" - 4558"

Alternative Names
Common Names: Eureka Dunegrass

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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