Taxon Report

Boechera yorkii S. Boyd

Last Chance rockcress

Print Report

Classification


Scientific Name:	Boechera yorkii S. Boyd
Common Name:	Last Chance rockcress
Family:	Brassicaceae
Element Code:	PDBRA40010
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: May	May
Elevation:	2220-2410 (7285-7905)
General Habitats:	Great Basin scrub, Pinyon and juniper woodland
Microhabitat:	Carbonate
Microhabitat Details:	rock outcrops, carbonate (dolomite)

Conservation Status


CA Rare Plant Rank:	1B.3
Global Rank:	G1
State Rank:	S1
State List:	None
Fed List:	None
Other Status:
CRPR Changes:	added to 1B on 2005-02-11

Occurrence Data from the CNDDB


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

Location


California Endemic: True
California Counties and Islands: Name (Code)
Inyo (INY)
Quads: Name (Quad Code)
Last Chance Mtn. (3711736)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	2	67 %
Other	2	66%

Notes



Known from only two occurrences near Last Chance Mountain. Not in The Jepson Manual. See Madroño 51(4): 387 (2004) for original description.
Threats:

Taxonomy:

Selected References

Proposed Addition to CRPR 1B, G1 / S1.3 (2005)

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].