Taxon Details

Boechera tiehmii

Tiehm's rockcress

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Taxon Summary:

Boechera tiehmii, commonly known as Tiehm's rockcress, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, growing at elevations from 2970 to 3590 meters. Boechera tiehmii is ranked 1B.3, Plants Rare, Threatened or Endangered in California and Elsewhere; Not very threatened in California.

Classification

Scientific Name: Boechera tiehmii (Rollins) Al-Shehbaz
Common Name: Tiehm's rockcress
Family:	Brassicaceae
Element Code:	PDBRA06280
USDA Plants Symbol:
Synonyms/Other Names: Arabis tiehmii
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.3
Fed List:	None
State List:	None
Global Rank:	G3
State Rank:	S3
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	1988-01-01
Date Edited:	2022-12-06

Ecology and Life History

Lifeform: perennial herb

Blooming Period: Jul-Aug

Elevation:
2970 - 3590 meters
9745 - 11780 feet

General Habitats:

Alpine boulder and rock field (granitic)

Microhabitat Details:

Microhabitat:

Notes

Notes: Known in CA from approximately ten occurrences near Tioga Crest. On watch list in NV, where known from two occurrences. See Journal of the Arnold Arboretum 64:496 (1983) 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	22 %
Road/trail construction/maint.	2	22%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					9
A	B	C	D	X	U
9	0	0	0	0	0

Occurrence Status:
Historical >20 Years	9
Recent <=20 Years	0

Presence:
Presumed Extant	9
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA), Nevada (NV)

California Counties and Islands: Name (Code)
Mono (MNO)

Quads: Name (Quad Code)
Dunderberg Peak (3811913), Mount Dana (3711982), Tioga Pass (3711983)

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