CNPS

CNPS Rare Plant Inventory

Species Details

Leptosyne hamiltonii

Mt. Hamilton coreopsis

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Photo of Leptosyne hamiltonii
©2012 Aaron Schusteff 		Photo of Leptosyne hamiltonii
©2012 Aaron Schusteff 		Photo of Leptosyne hamiltonii
©2012 Aaron Schusteff

  Classification

Scientific Name:
Leptosyne hamiltonii Elmer
Common Name:
Mt. Hamilton coreopsis
Family: Asteraceae
Element Code: PDAST2L0C0
USDA Plants Symbol:
Synonyms/Other Names:

  Conservation Status

CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G2
State Rank:
 S2
Other Status: BLM_S; SB_UCBG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2021-05-26

  Ecology and Life History

Lifeform: annual herb
Blooming Period: Mar-May
JFMAMJJASOND
Elevation:
550 - 1300 meters
1805 - 4265 feet
General Habitats:
  • Cismontane woodland (rocky)
Microhabitat Details:
Microhabitat:

  Notes

Notes:
Known only from the Mt. Hamilton Range. See Botanical Gazette 41:323-324 (1906) for original description, and Madroño 4(7):214-215 (1938) for revised nomenclature.
Threats:
Taxonomy:

  Threat List Data from the CNDDB

Threat List Total: 5
Total EOs % of EOs
EOs with Threat Listed: 5 24 %
THREAT LIST:
Grazing 3 14%
Non-native plant impacts 1 4%
Vandalism/dumping/litter 1 4%
Erosion/runoff 1 4%
Feral pigs 1 4%

  Occurrence Data from the CNDDB

Total Occurrences: 21
Element Occurrence Ranks:
A B C D X U
12 6 0 0 0 3
Occurrence Status:
Historical >20 Years 18
Recent <=20 Years 3
Presence:
Presumed Extant 21
Possibly Extirpated 0
Presumed Extirpated 0

  Location

California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA), Santa Clara (SCL), Stanislaus (STA)
Quads: Name (Quad Code)
Cedar Mtn. (3712155), Isabel Valley (3712135), Lick Observatory (3712136), Lone Tree Creek (3712154), Mississippi Creek (3712124), Mt. Stakes (3712134), Solyo (3712153)
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
Click on quad for name. Hold Shift Key to use mouse scroll wheel

  Selected References

Suggested Citation:
California Native Plant Society, Rare Plant Program. 2023. Rare Plant Inventory (online edition, v9.5). Website https://www.rareplants.cnps.org [accessed 29 May 2023].