Taxon Report

Boechera dispar (M.E. Jones) Al-Shehbaz

pinyon rockcress

Print Report

Classification


Scientific Name:	Boechera dispar (M.E. Jones) Al-Shehbaz
Common Name:	pinyon rockcress
Family:	Brassicaceae
Element Code:	PDBRA060F0
USDA Plants Symbol:
Synonyms/Other Names:	Arabis dispar

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Mar-Jun	Mar-Jun
Elevation:	1200-2540 (3935-8335)
General Habitats:	Joshua tree "woodland", Mojavean desert scrub, Pinyon and juniper woodland
Microhabitat:	Granitic, Gravelly
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	97
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	7
Fair (C)	5
Poor (D)	0
None (X)	0
Unknown (U)	84

Location


California Endemic: False
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)

Threat List Data from the CNDDB


Threat List Total:	10
EOs with Threat Listed:	Total EOs	% of EOs
	33	34 %
ORV activity	18	18%
Non-native plant impacts	9	9%
Grazing	8	8%
Foot traffic/trampling	6	6%
Road/trail construction/maint.	6	6%
Vandalism/dumping/litter	2	2%
Other	2	2%
Recreational use (non-ORV)	2	2%
Mining	2	2%
Military operations	1	1%

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:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 7 January 2025].