Taxon Details
Helianthus inexpectatus
Newhall sunflower
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© 2012 Anuja Parikh and Nathan Gale |
© 2012 Anuja Parikh and Nathan Gale |
© 2012 Anuja Parikh and Nathan Gale |
Taxon Summary:
Helianthus inexpectatus, commonly known as Newhall sunflower, is a perennial rhizomatous herb in the Asteraceae that is found only in California. It occurs within Marshes and swamps, and Riparian woodland, growing at elevations from 305 to 305 meters. Helianthus inexpectatus is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.|
Scientific Name: Helianthus inexpectatus D.J. Keil & Elvin |
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Common Name: Newhall sunflower |
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| Family: | Asteraceae | |
| Element Code: | PDAST4N250 | |
| USDA Plants Symbol: | ||
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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.1 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: added to 1B.1 on 2010-08-16 |
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| Add Date: | 2010-08-16 |
| Date Edited: | 2024-02-06 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: Aug-Oct
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Elevation:
305 - 305 meters 1000 - 1000 feet |
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General Habitats:
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| Microhabitat Details: freshwater | ||||||||||||||
Microhabitat:
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Notes: Known from a single occurrence of fewer than 10 individuals. See Aliso 28:59-62 (2010) for original description. |
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Threats: Potentially threatened by development, hydrological alterations, habitat alteration and loss, urban runoff, non-native plants, recreational activities, and foot traffic. Possibly threatened by air pollution and pollination reduction. |
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Taxonomy: |
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| Threat List Total: | 4 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 1 | 100 % |
| THREAT LIST: | ||
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| Altered flood/tidal/hydrologic regime | 1 | 100% |
| Development | 1 | 100% |
| Non-native plant impacts | 1 | 100% |
| Over-collecting/poaching | 1 | 100% |
| Total Occurrences: | 1 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 0 | 1 | 0 | 0 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 1 | ||||
| Recent <=20 Years | 0 | ||||
| Presence: | |||||
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| Presumed Extant | 1 | ||||
| Possibly Extirpated | 0 | ||||
| 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) Los Angeles (LAX) |
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Quads: Name (Quad Code) Newhall (3411845) |
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Notes:
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Presumed Extant
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