Taxon Details

Boechera ultraalsa

Snow Mountain rockcress

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Taxon Summary:

Boechera ultraalsa, commonly known as Snow Mountain rockcress, is a perennial herb in the Brassicaceae that is found only in California. It occurs within Upper montane coniferous forest, growing at elevations from 1800 to 1800 meters. Boechera ultraalsa is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.

Classification

Scientific Name: Boechera ultraalsa Windham & Al-Shehbaz
Common Name: Snow Mountain rockcress
Family:	Brassicaceae
Element Code:	PDBRA40140
USDA Plants Symbol:
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.1
Fed List:	None
State List:	None
Global Rank:	G1
State Rank:	S1
Other Status:
CRPR Changes: added to 1B.1 on 2011-06-01
Add Date:	2011-06-01
Date Edited:	2023-05-02

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jun-Jul

Elevation:
1800 - 1800 meters
5905 - 5905 feet

General Habitats:

Upper montane coniferous forest (rocky)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known from only one occurrence on Snow Mtn.
Threats:
Taxonomy: Previously identified as Arabis (Boechera) platysperma.

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	0
	Total EOs	% of EOs
EOs with Threat Listed:	0	%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					1
A	B	C	D	X	U
0	0	0	0	0	1

Occurrence Status:
Historical >20 Years	1
Recent <=20 Years	0

Presence:
Presumed Extant	1
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Lake (LAK)

Quads: Name (Quad Code)
Potato Hill (3912237)

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

Click on quad for name. Hold Shift Key to use mouse scroll wheel

CNPS Status Review:	Proposed New Add to Rank 1B.1, G1 / S1
Original Description:	Harvard Papers in Botany 11(1):61-88 (2006)
Species Account:	Boechera ultraalsa profile for potential Species of Conservation Concern evaluation (2018)

CNPS Rare Plant Inventory