Helianthella castanea
Common Name: Diablo helianthella
Family: Asteraceae
Synonyms:
Element Code: PDAST4M020
Full Name: Helianthella castanea Greene
USDA PLANTS Symbol: HECA2

© 2007 Erin McDermott
Biology Glossary
  • Lifeform: perennial herb
  • Blooming Period: March - June
  • Habitat:  
    • Broadleafed upland forest
    • Chaparral
    • Cismontane woodland
    • Coastal scrub
    • Riparian woodland
    • Valley and foothill grassland
Rarity Status Glossary
Occurrence Data from DFG
California Natural Diversity Database Glossary
  • Total # of Known Element Occurrences: 97
  • Element Occurrence Ranks:
    A B C D X U
    8 30 24 2 1 32
    • Population Status:
    Historic
    >20 yrs    		 Recent
    <=20 yrs
    25 72
  • Presence:
    Present Extant Possibly Extirpated Extirpated
    96 1 0
Notes Glossary
  • Threatened by urbanization, grazing, and fire suppression. Possibly threatened by roadside maintenance.
  • To submit rare plant observation data, use the CNDDB field survey form. Please see also the CNPS Rare Plant Data page.
  • Date Added: 1974-01-01
  • Last Update: 2010-11-15
Location Glossary
  • Elevation: 60 - 1300 meters
  • California Endemic: yes
  • States: California
  • California Counties and Islands:   name (code)
    Alameda (ALA),  Contra Costa (CCA),  Marin (MRN) *,  San Francisco (SFO) *,  San Mateo (SMT)
  • Quads:   name (DWR code) USGS code
    Cedar Mtn. (445D) 37121E5,  Dublin (446B) 37121F8,  La Costa Valley (446D) 37121E7,  Hayward (447A) 37122F1,  San Francisco South (448B) 37122F4,  Byron Hot Springs (463C) 37121G6,  Antioch South (464A) 37121H7,  Clayton (464B) 37121H8,  Diablo (464C) 37121G8,  Tassajara (464D) 37121G7,  Walnut Creek (465A) 37122H1,  Briones Valley (465B) 37122H2,  Oakland East (465C)* 37122G2,  Las Trampas Ridge (465D) 37122G1,  Richmond (466A) 37122H3,  San Rafael (467A)* 37122H5,  Benicia (482C) 38122A2,  Mare Island (483D) 38122A3
  • Notes:
      Definitions of codes preceding a county and/or quad:
      * Presumed extirpated
      ? Uncertain about distribution or identity
      ?* Uncertain about distribution, but presumed extirpated if once present
      (?) Occurrence confirmed, but possibly extirpated
      Species may be present in other areas where conditions are favorable.
Presumed Extant Presumed Extirpated or Unknown 238
Links to Leading Resources of Taxon Information
Suggested Citation
California Native Plant Society (CNPS). Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Accessed on .
-122.0,37.75

CA
37121E5=Cedar Mtn. (445D) 37121E5,37121F8=Dublin (446B) 37121F8,37121E7=La Costa Valley (446D) 37121E7,37122F1=Hayward (447A) 37122F1,37122F4=San Francisco South (448B) 37122F4,37121G6=Byron Hot Springs (463C) 37121G6,37121H7=Antioch South (464A) 37121H7,37121H8=Clayton (464B) 37121H8,37121G8=Diablo (464C) 37121G8,37121G7=Tassajara (464D) 37121G7,37122H1=Walnut Creek (465A) 37122H1,37122H2=Briones Valley (465B) 37122H2,37122G2=Oakland East (465C)* 37122G2,37122G1=Las Trampas Ridge (465D) 37122G1,37122H3=Richmond (466A) 37122H3,37122H5=San Rafael (467A)* 37122H5,38122A2=Benicia (482C) 38122A2,38122A3=Mare Island (483D) 38122A3