Species Details

Helianthella castanea

Diablo helianthella

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Photo of Helianthella castanea
© 2013 Christopher Bronny
Photo of Helianthella castanea
© 2007 Erin McDermott
Photo of Helianthella castanea
© 2015 John Doyen
Scientific Name:
Helianthella castanea Greene
Common Name:
Diablo helianthella
Family: Asteraceae
Element Code: PDAST4M020
USDA Plants Symbol: HECA2
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: Mar-Jun
Elevation:
60 - 1300 meters
195 - 4265 feet
General Habitat:
  • Broadleafed upland forest
  • Chaparral
  • Cismontane woodland
  • Coastal scrub
  • Riparian woodland
  • Valley and foothill grassland
General Micro Habitat:
Micro Habitat:
  • Azonal soils
  • Partial Shade (often)
  • Rocky (usually)
Notes:

Threatened by urbanization, grazing, and fire suppression. Possibly threatened by road maintenance, recreational activities, and non-native plants.

Threats:

Taxonomy:
Other:
Total Occurrences: 107
Element Occurrence Ranks:
A B C D X U
11 35 22 2 1 36
Occurrence Status:
Historical >20 Years 50
Recent <=20 Years 57
Presence:
Presumed Extant 106
Possibly Extirpated 1
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Alameda (ALA), Contra Costa (CCA), Marin (MRN)*, San Francisco (SFO)*, San Mateo (SMT), Solano (SOL)
Quads: Name (Quad Code)
Antioch South (3712187), Benicia (3812212), Briones Valley (3712282), Cedar Mtn. (3712155), Clayton (3712188), Cordelia (3812222), Diablo (3712178), Dublin (3712168), Hayward (3712261), Hunters Point (3712263), Las Trampas Ridge (3712271), Mendenhall Springs (3712156), Oakland East (3712272)*, Richmond (3712283), San Francisco South (3712264), San Rafael (3712285)*, Tassajara (3712177), Walnut Creek (3712281)
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.

Map

Presumed Extant
Counties   Quads