Species Details
Chorizanthe howellii
Howell's spineflower
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Scientific Name: Chorizanthe howellii Goodm. |
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Common Name: Howell's spineflower |
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| Family: | Polygonaceae | |
| Element Code: | PDPGN040C0 | |
| USDA Plants Symbol: | CHHO2 | |
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | FE (1992-06-22) |
| State List: | CT (1987-01-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | |
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CRPR Changes: |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2021-11-05 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: May-Jul
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Elevation:
0 - 45 meters 0 - 150 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Known only from north of Ft. Bragg. Threatened by development, foot traffic, recreational activities, vehicles, and non-native plants. Potentially threatened by trail construction. Closely related to C. pungens. See Annals of the Missouri Botanical Garden 21:44 (1934) for original description, and Phytologia 66(2):131-132 (1989) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 8 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 8 | 89 % |
| THREAT LIST: | ||
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| Foot traffic/trampling | 5 | 55% |
| Other | 5 | 55% |
| Recreational use (non-ORV) | 4 | 44% |
| Non-native plant impacts | 3 | 33% |
| Development | 2 | 22% |
| Road/trail construction/maint. | 2 | 22% |
| Erosion/runoff | 1 | 11% |
| ORV activity | 1 | 11% |
| Total Occurrences: | 9 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 6 | 0 | 0 | 0 | 3 |
| Occurrence Status: | |||||
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| Historical >20 Years | 3 | ||||
| Recent <=20 Years | 6 | ||||
| Presence: | |||||
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| Presumed Extant | 9 | ||||
| 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) Mendocino (MEN) |
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Quads: Name (Quad Code) Fort Bragg (3912347), Inglenook (3912357), Mendocino (3912337) |
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Notes:
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Presumed Extant
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