Taxon Report

Boechera shockleyi (Munz) Dorn

Shockley's rockcress

Print Report

Taxon Summary

Boechera shockleyi, commonly known as Shockley's rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland (carbonate, gravelly, quartzite, and rocky), growing at elevations from 875 to 2310 meters. Boechera shockleyi is ranked 2B.2, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Boechera shockleyi (Munz) Dorn
Common Name:	Shockley's rockcress
Family:	Brassicaceae
Element Code:	PDBRA061V0
USDA Plants Symbol:
Synonyms/Other Names:	Arabis shockleyi

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May-Jun	May-Jun
Elevation:	875-2310 (2870-7580)
General Habitats:	Pinyon and juniper woodland
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.2
Global Rank:	G3
State Rank:	S2
State List:	None
Fed List:	None
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:	changed from 2.2 to 2B.2 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	61
Element Occurrence Ranks:
Excellent (A)	2
Good (B)	14
Fair (C)	3
Poor (D)	0
None (X)	0
Unknown (U)	42

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO), San Bernardino (SBD)
Quads: Name (Quad Code)
Big Bear City (3411637), Butler Peak (3411731), Cowhorn Valley (3711821), Deep Springs Lake (3711831), Dyer (3711861), Fawnskin (3411638), Last Chance Mtn. (3711736), Last Chance Range SE (3711715), Lucerne Valley (3411648), Onyx Peak (3411626), Panamint Butte (3611743), Rattlesnake Canyon (3411636), Rimrock (3411625), Tinemaha Reservoir (3711812), Waucoba Mtn. (3711811), Waucoba Spring (3711718), Westgard Pass (3711832)

Threat List Data from the CNDDB


Threat List Total:	11
EOs with Threat Listed:	Total EOs	% of EOs
	23	38 %
Mining	18	29%
ORV activity	10	16%
Recreational use (non-ORV)	4	6%
Road/trail construction/maint.	4	6%
Grazing	4	6%
Foot traffic/trampling	3	4%
Non-native plant impacts	2	3%
Wood cutting or brush clearing	2	3%
Erosion/runoff	1	1%
Improper burning regime	1	1%
Vandalism/dumping/litter	1	1%

Notes



Threatened by mining and vehicles. See Bulletin of the Southern California Academy of Sciences 31(2):61 (1932) for original description, and Rhodora 43(511):457 (1941) for taxonomic treatment.
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 5 February 2025].