Taxon Details

Sibaropsis hammittii

Hammitt's clay-cress

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Taxon Summary:

Sibaropsis hammittii, commonly known as Hammitt's clay-cress, is a annual herb in the Brassicaceae that is found only in California. It occurs within Chaparral (openings), and Valley and foothill grassland, growing at elevations from 720 to 1065 meters. Sibaropsis hammittii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Sibaropsis hammittii S. Boyd & T.S. Ross
Common Name: Hammitt's clay-cress
Family:	Brassicaceae
Element Code:	PDBRA32010
USDA Plants Symbol:	SIHA8
Synonyms/Other Names:
Name Status:	JEF, FNA, POWO, IPNI, Tropicos

Conservation Status

CA Rare Plant Rank:	1B.2
Fed List:	None
State List:	None
Global Rank:	G2
State Rank:	S2
Other Status:	SB_CalBG/RSABG; USFS_S
CRPR Changes:
Add Date:	2001-01-01
Date Edited:	2022-06-08

Ecology and Life History

Lifeform: annual herb

Blooming Period: Mar-Apr

Elevation:
720 - 1065 meters
2360 - 3495 feet

General Habitats:

Chaparral (openings)
Valley and foothill grassland

Microhabitat Details:

Microhabitat:

Clay

Notes

Notes: Threatened by non-native plants, vehicles, illegal dumping, grazing, and trampling. Not in The Jepson Manual. See Madroño 44(1):30 (1997) 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:	1	14 %
Foot traffic/trampling	1	14%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					7
A	B	C	D	X	U
0	2	0	0	0	5

Occurrence Status:
Historical >20 Years	6
Recent <=20 Years	1

Presence:
Presumed Extant	7
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)

Quads: Name (Quad Code)
Viejas Mountain (3211676), Wildomar (3311753)

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