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Scientific Name: Chorizanthe valida Wats. |
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Common Name: Sonoma spineflower |
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| Family: | Polygonaceae | |
| Element Code: | PDPGN040V0 | |
| USDA Plants Symbol: | CHVA | |
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1992-06-22) |
| State List: | CE (1990-01-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2021-05-26 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Jun-Aug
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Elevation:
10 - 305 meters 35 - 1000 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Thought extinct for 77 years; only known extant occurrence was rediscovered in 1980 at Pt. Reyes NS. Experimental introduction work ongoing as of 2000. Closely related to C. pungens. See Proceedings of the American Academy of Arts and Sciences 12:271 (1877) for original description, Phytologia 66(2):132-134 (1989) for taxonomic treatment, Fremontia 18(1):17-18 (1990) for species account, and Madroño 39(4):271-280 (1992) and 40(4):285-288 (1993) for discussion of grazing effects. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 4 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 3 | 50 % |
| THREAT LIST: | ||
|---|---|---|
| Grazing | 3 | 50% |
| Other | 2 | 33% |
| Road/trail construction/maint. | 1 | 16% |
| Non-native plant impacts | 1 | 16% |
| Total Occurrences: | 6 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 3 | 0 | 0 | 3 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 3 | ||||
| Recent <=20 Years | 3 | ||||
| Presence: | |||||
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| Presumed Extant | 3 | ||||
| Possibly Extirpated | 3 | ||||
| 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) Marin (MRN), Sonoma (SON)* |
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Quads: Name (Quad Code) Arched Rock (3812342), Drakes Bay (3812218), Fort Ross (3812352)*, Petaluma (3812226)?*, Petaluma River (3812225), Plantation (3812353), Sebastopol (3812247)* |
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Notes:
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Presumed Extant
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