CNPS

CNPS Rare Plant Inventory

Species Details

Streptanthus howellii

Howell's jewelflower

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Photo by ©Rick York and CNPS max-height:128px; max-width:145px;
©Rick York and CNPS

Classification

Scientific Name:
Streptanthus howellii Wats.
Common Name:
Howell's jewelflower
Family: Brassicaceae
Element Code: PDBRA2G0N0
USDA Plants Symbol: STHO
Synonyms/Other Names:

Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G2G3
State Rank:
 S2
Other Status: USFS_S
CRPR Changes:
Add Date: 1980-01-01
Date Edited: 2021-05-26

Ecology and Life History

Lifeform: perennial herb
Blooming Period: Jul-Aug
Elevation:
305 - 1500 meters
1000 - 4920 feet
General Habitat:
  • Lower montane coniferous forest (rocky, serpentinite)
General Micro Habitat:
Micro Habitat:

Notes

Notes:
Threatened by mining. Candidate for state listing in OR. See Proceedings of the American Academy of Arts and Sciences 20:353 (1885) for original description.
Threats:
Taxonomy:
Other:

Occurrence Data from the CNDDB

Total Occurrences: 30
Element Occurrence Ranks:
A B C D X U
1 3 2 3 0 21
Occurrence Status:
Historical >20 Years 11
Recent <=20 Years 19
Presence:
Presumed Extant 30
Possibly Extirpated 0
Presumed Extirpated 0

Location

California Endemic:
California Island:
States: Name (Code)
California (CA), Oregon (OR)
California Counties and Islands: Name (Code)
Del Norte (DNT)
Quads: Name (Quad Code)
Gasquet (4112378), High Divide (4112481), High Plateau Mtn. (4112388), Shelly Creek Ridge (4112387)
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
Print this Map
Counties   Quads

Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2022. Rare Plant Inventory (online edition, v9-01 1.5). Website https://www.rareplants.cnps.org [accessed 19 May 2022].