Taxon Report

Boechera cobrensis (M.E. Jones) Dorn

Masonic rockcress

Print Report

Classification


Scientific Name:	Boechera cobrensis (M.E. Jones) Dorn
Common Name:	Masonic rockcress
Family:	Brassicaceae
Element Code:	PDBRA06080
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Jun-Jul	Jun-Jul
Elevation:	1375-3105 (4510-10190)
General Habitats:	Great Basin scrub, Pinyon and juniper woodland
Microhabitat:	Sandy
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	2B.3
Global Rank:	G5
State Rank:	S3
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	changed from 2.3 to 2B.3 on 2013-06-12

Occurrence Data from the CNDDB


Total Occurrences:	28
Element Occurrence Ranks:
Excellent (A)	1
Good (B)	4
Fair (C)	2
Poor (D)	0
None (X)	0
Unknown (U)	21

Location


California Endemic: False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO), Tulare (TUL)
Quads: Name (Quad Code)
Big Alkali (3811922), Bodie (3811921), Bonita Meadows (3611813), Bridgeport (3811932), Chris Flat (3811944), Convict Lake (3711857), Dexter Canyon (3711877), Dome Hill (3811931), Fales Hot Springs (3811934), Glass Mountain (3711876), June Lake (3711971), Lundy (3811912), Mono Mills (3711888), Negit Island (3811911), Old Mammoth (3711868), Risue Canyon (3811954), Telescope Peak (3611721), Twin Lakes (3811923), Watterson Canyon (3711866), Waucoba Spring (3711718), Whitmore Hot Springs (3711867)

Threat List Data from the CNDDB


Threat List Total:	4
EOs with Threat Listed:	Total EOs	% of EOs
	6	21 %
Road/trail construction/maint.	5	17%
Development	1	3%
Foot traffic/trampling	1	3%
Grazing	1	3%

Notes



Possibly threatened by development and road maintenance. See Rhodora 43(511):455-457 (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 7 January 2025].