Taxon Details
Helianthella castanea
Diablo helianthella
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© 2013 Christopher Bronny |
© 2007 Erin McDermott |
© 2015 John Doyen |
Taxon Summary:
Helianthella castanea, commonly known as Diablo helianthella, is a perennial herb in the Asteraceae that is found only in California. It occurs within Broadleafed upland forest, Chaparral, Cismontane woodland, Coastal scrub, Riparian woodland, and Valley and foothill grassland, growing at elevations from 60 to 1300 meters. Helianthella castanea is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Helianthella castanea Greene |
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Common Name: Diablo helianthella |
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| Family: | Asteraceae | |
| Element Code: | PDAST4M020 | |
| USDA Plants Symbol: | HECA2 | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: Mar-Jun
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Elevation:
60 - 1300 meters 195 - 4265 feet |
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General Habitats:
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| Microhabitat Details: Azonal soil, often partial Shade | ||||||||||||||
Microhabitat:
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| Threat List Total: | 12 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 55 | 51 % |
| THREAT LIST: | ||
|---|---|---|
| Grazing | 25 | 23% |
| Road/trail construction/maint. | 18 | 16% |
| Foot traffic/trampling | 17 | 15% |
| Development | 12 | 11% |
| Recreational use (non-ORV) | 10 | 9% |
| Other | 8 | 7% |
| Improper burning regime | 8 | 7% |
| Erosion/runoff | 6 | 5% |
| Non-native plant impacts | 6 | 5% |
| Insufficient population/stand size | 1 | 0% |
| Vandalism/dumping/litter | 1 | 0% |
| Wood cutting or brush clearing | 1 | 0% |
| Total Occurrences: | 107 | ||||
| Element Occurrence Ranks: | |||||
|---|---|---|---|---|---|
| A | B | C | D | X | U |
| 11 | 35 | 22 | 2 | 1 | 36 |
| Occurrence Status: | |||||
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| Historical >20 Years | 59 | ||||
| Recent <=20 Years | 48 | ||||
| Presence: | |||||
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| Presumed Extant | 106 | ||||
| Possibly Extirpated | 1 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Alameda (ALA), Contra Costa (CCA), Marin (MRN)*, San Francisco (SFO)*, San Mateo (SMT) |
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Quads: Name (Quad Code) Antioch South (3712187), Benicia (3812212), Briones Valley (3712282), Cedar Mtn. (3712155), Clayton (3712188), Diablo (3712178), Dublin (3712168), Hayward (3712261), Hunters Point (3712263), Las Trampas Ridge (3712271), Oakland East (3712272)*, Richmond (3712283), San Francisco South (3712264), San Rafael (3712285)*, Tassajara (3712177), Walnut Creek (3712281) |
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Notes:
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Presumed Extant
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