Species Details

Swallenia alexandrae

Eureka Valley dune grass

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Scientific Name:
Swallenia alexandrae (Swall.) Soderstrom & Decker
Common Name:
Eureka Valley dune grass
Family: Poaceae
Element Code: PMPOA5Y010
USDA Plants Symbol: SWAL
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: FT (1978-04-26)
State List: CR (1981-08-01)
Global Rank: G2
State Rank:
S2
Other Status: SB_CalBG/RSABG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2021-05-26
Lifeform: perennial rhizomatous herb
Blooming Period: Apr-Jun
Elevation:
850 - 1280 meters
2790 - 4200 feet
General Habitat:
  • Desert dunes
General Micro Habitat:
Micro Habitat:
Notes:
Known only from dunes in Eureka Valley, within Death Valley NP. Habitat previously degraded by vehicle traffic; populations recovering well, but still threatened by vehicle trespass and recreation. See Journal of the Washington Academy of Sciences 40(1):19-21 (1950) for original description, MadroƱo 17(3):88 (1963) for revised nomenclature, and Biological Conservation 46:217-242 (1988) for population biology.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 5
Element Occurrence Ranks:
A B C D X U
5 0 0 0 0 0
Occurrence Status:
Historical >20 Years 0
Recent <=20 Years 5
Presence:
Presumed Extant 5
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Inyo (INY)
Quads: Name (Quad Code)
East of Joshua Flats (3711727), East of Waucoba Spring (3711717), Last Chance Range SW (3711716)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads