Taxon Details

Boechera dispar

pinyon rockcress

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Taxon Summary:

Boechera dispar, commonly known as pinyon rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Joshua tree "woodland", Mojavean desert scrub, and Pinyon and juniper woodland, growing at elevations from 1200 to 2540 meters. Boechera dispar is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

Lifeform: perennial herb
Blooming Period: Mar-Jun
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Elevation:
1200 - 2540 meters
3935 - 8335 feet
General Habitats:
  • Joshua tree "woodland"
  • Mojavean desert scrub
  • Pinyon and juniper woodland
Microhabitat Details:
Microhabitat:
  • Granitic
  • Gravelly
Notes:
Rare in SBD Co. Threatened by mining, non-native plants, recreational activities, road construction, and vehicles. See Contributions to Western Botany 8:41 (1898) for original description.
Threats:
Taxonomy:
Threat List Total: 10
Total EOs % of EOs
EOs with Threat Listed: 33 34 %
THREAT LIST:
ORV activity 18 18%
Non-native plant impacts 9 9%
Grazing 8 8%
Foot traffic/trampling 6 6%
Road/trail construction/maint. 6 6%
Total Occurrences: 97
Element Occurrence Ranks:
A B C D X U
1 7 5 0 0 84
Occurrence Status:
Historical >20 Years 33
Recent <=20 Years 64
Presence:
Presumed Extant 97
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Nevada (NV)
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO), Riverside (RIV), San Bernardino (SBD), Tulare (TUL)
Quads: Name (Quad Code)
Apple Valley South (3411742), Ballarat (3611712), Benton (3711874), Big Bear City (3411637), Big Pine (3711823), Bighorn Canyon (3411635), Bishop (3711834), Blackrock (3611882), Butler Peak (3411731), Cannell Peak (3511873), Casa Diablo Mtn. (3711855), China Gardens (3611725), Chocolate Mtn. (3711748), Coso Peak (3611726), Fish Slough (3711844), Grand View Mine (3411657), Hammil Valley (3711864), Indian Cove (3411612), Jackass Canyon (3611755), Joshua Tree South (3411613), Kearsarge Peak (3611873), Mazourka Peak (3611881), Moonridge (3411627), New York Butte (3611768), Onyx Peak (3411626), Panamint (3611711), Panamint Butte (3611743), Rattlesnake Canyon (3411636), Rimrock (3411625), Rockhouse Basin (3511882), Telescope Peak (3611721), Tinemaha Reservoir (3711812), Toms Place (3711856), Uhlmeyer Spring (3711822), Westgard Pass (3711832), White Dome (3511872), Yucca Valley North (3411624)
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.
Presumed Extant
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