Taxon Details

Streptanthus callistus

Mt. Hamilton jewelflower

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Taxon Summary:

Streptanthus callistus, commonly known as Mt. Hamilton jewelflower, is a annual herb in the Brassicaceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 600 to 790 meters. Streptanthus callistus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification

Scientific Name: Streptanthus callistus Morrison
Common Name: Mt. Hamilton jewelflower
Family:	Brassicaceae
Element Code:	PDBRA2G0A0
USDA Plants Symbol:	STCA3
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:	G1
State Rank:	S1
Other Status:	BLM_S
CRPR Changes:
Add Date:	1974-01-01
Date Edited:	2024-11-05

Ecology and Life History

Lifeform: annual herb

Blooming Period: Apr-May

Elevation:
600 - 790 meters
1970 - 2590 feet

General Habitats:

Chaparral
Cismontane woodland

Microhabitat Details:

Microhabitat:

Notes

Notes: Known only from the Mt. Hamilton Range. Possibly threatened by erosion and road construction and maintenance. See Madroño 4(7):205 (1938) for original description.
Threats:
Taxonomy:

Threat List Data from the CNDDB

THREAT LIST:
Threat List Total:	3
	Total EOs	% of EOs
EOs with Threat Listed:	2	50 %
Non-native plant impacts	2	50%
Road/trail construction/maint.	1	25%
Erosion/runoff	1	25%

Occurrence Data from the CNDDB

Element Occurrence Ranks:
Total Occurrences:					4
A	B	C	D	X	U
1	2	0	0	0	1

Occurrence Status:
Historical >20 Years	0
Recent <=20 Years	4

Presence:
Presumed Extant	4
Possibly Extirpated	0
Presumed Extirpated	0

Location

California Endemic:

California Island:

States: Name (Code)
California (CA)

California Counties and Islands: Name (Code)
Santa Clara (SCL)

Quads: Name (Quad Code)
Isabel Valley (3712135), Mt. Sizer (3712125)

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