Taxon Details

Boechera yorkii

Last Chance rockcress

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Taxon Summary:

Boechera yorkii, commonly known as Last Chance rockcress, is a perennial herb in the Brassicaceae that is found only in California. It occurs within Great Basin scrub, and Pinyon and juniper woodland, growing at elevations from 2220 to 2410 meters. Boechera yorkii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Boechera yorkii S. Boyd
Common Name: Last Chance rockcress
Family:	Brassicaceae
Element Code:	PDBRA40010
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:
CRPR Changes: added to 1B on 2005-02-11
Add Date:	2005-01-01
Date Edited:	2023-05-02

Ecology and Life History

Lifeform: perennial herb

Blooming Period: May

Elevation:
2220 - 2410 meters
7285 - 7905 feet

General Habitats:

Great Basin scrub
Pinyon and juniper woodland

Microhabitat Details: rock outcrops, carbonate (dolomite)

Microhabitat:

Carbonate

Notes

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:

Threat List Data from the CNDDB

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

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					3
A	B	C	D	X	U
0	0	0	0	0	3

Occurrence Status:
Historical >20 Years	3
Recent <=20 Years	0

Presence:
Presumed Extant	3
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Inyo (INY)

Quads: Name (Quad Code)
Last Chance Mtn. (3711736)

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.

Regional Map

Map

Presumed Extant

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CNPS Rare Plant Inventory