Taxon Report

Boechera hirshbergiae (S. Boyd) Al-Shehbaz

Hirshberg's rockcress

Print Report

Taxon Summary

Boechera hirshbergiae, commonly known as Hirshberg's rockcress, is a perennial herb in the Brassicaceae that is found only in California. It occurs within Pebble (Pavement) plain, growing at elevations from 1400 to 1415 meters. Boechera hirshbergiae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Boechera hirshbergiae (S. Boyd) Al-Shehbaz
Common Name:	Hirshberg's rockcress
Family:	Brassicaceae
Element Code:	PDBRA064D0
USDA Plants Symbol:
Synonyms/Other Names:	Arabis hirshbergiae S.D. Boyd

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: Mar-May	Mar-May
Elevation:	1400-1415 (4595-4645)
General Habitats:	Pebble (Pavement) plain
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G1Q
State Rank:	S1
State List:	None
Fed List:	None
Other Status:	SB_CRES
CRPR Changes:

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)
San Diego (SDG)
Quads: Name (Quad Code)
Cuyamaca Peak (3211685), Julian (3311615)

Threat List Data from the CNDDB


Threat List Total:	1
EOs with Threat Listed:	Total EOs	% of EOs
	1	33 %
Grazing	1	33%

Notes



Known only from near Cuyamaca Lake. Threatened by grazing. Not in The Jepson Manual (1993); a synonym of B. johnstonii in TJM 2; see Harvard Papers in Botany 11(1):61-88 (2006) for relative taxonomic treatment. See Aliso 17:203 (1998) for original description, and Novon 13(4):381-391 (2003) for revised nomenclature
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 23 May 2025].