Species Details
Helianthella castanea
Diablo helianthella
View Report Copy Link CalFlora EFlora CCH CalPhotos iNaturalist
© 2013 Christopher Bronny |
© 2007 Erin McDermott |
© 2015 John Doyen |
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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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| 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: | ||
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| 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: | |||||
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| A | B | C | D | X | U |
| 11 | 35 | 22 | 2 | 1 | 36 |
| Occurrence Status: | |||||
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| Historical >20 Years | 58 | ||||
| Recent <=20 Years | 49 | ||||
| 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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