Taxon Details
Swallenia alexandrae
Eureka Valley dune grass
View Report Copy Link Calflora eFlora CCH CalPhotos iNaturalist
|
Taxon Summary:
Swallenia alexandrae, commonly known as Eureka Valley dune grass, is a perennial rhizomatous herb in the Poaceae that is found only in California. It occurs within Desert dunes, growing at elevations from 850 to 1280 meters. Swallenia alexandrae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
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: |
||
| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
|
| CA Rare Plant Rank: | 1B.2 |
| Fed List: | FT (2018-03-29) |
| 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: | 2023-05-02 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: Apr-Jun
|
||||||||||||||
|
Elevation:
850 - 1280 meters 2790 - 4200 feet |
||||||||||||||
General Habitats:
|
||||||||||||||
| Microhabitat Details: | ||||||||||||||
|
Microhabitat:
|
||||||||||||||
|
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, Madroño 17(3):88 (1963) for revised nomenclature, and Biological Conservation 46:217-242 (1988) for population biology. |
|
|
Threats: |
|
|
Taxonomy: |
|
| Threat List Total: | 1 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 1 | 20 % |
| THREAT LIST: | ||
|---|---|---|
| ORV activity | 1 | 20% |
| 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:
|
|||||||||||||
Presumed Extant
Click on quad for name. Hold Shift Key to use mouse scroll wheel