Species Details
Hemizonia congesta ssp. congesta
congested-headed hayfield tarplant
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© 2015 Vernon Smith |
© 2015 John Doyen |
© 2015 Vernon Smith |
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Scientific Name: Hemizonia congesta DC. ssp. congesta |
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Common Name: congested-headed hayfield tarplant |
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| Family: | Asteraceae | |
| Element Code: | PDAST4R0W1 | |
| USDA Plants Symbol: | HECOC2 | |
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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: | G5T2 |
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State Rank: |
S2 |
| Other Status: | SB_UCBG |
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CRPR Changes: |
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| Add Date: | 1988-01-01 |
| Date Edited: | 2023-06-06 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: Apr-Nov
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Elevation:
20 - 560 meters 65 - 1835 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Threatened by agriculture, development, and road construction. Possibly threatened by grazing. Hybridizes with H. congesta ssp. lutescens. See H. congesta ssp. leucocephala in The Jepson Manual (1993). What was once considered H. congesta ssp. congesta in The Jepson Manual (1993) is now considered H. congesta ssp. lutescens; a common taxon. |
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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: | 19 | 37 % |
| THREAT LIST: | ||
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| Development | 13 | 25% |
| Grazing | 4 | 7% |
| Non-native plant impacts | 3 | 5% |
| Foot traffic/trampling | 2 | 3% |
| Agriculture | 1 | 1% |
| Disking | 1 | 1% |
| Other | 1 | 1% |
| Road/trail construction/maint. | 1 | 1% |
| Total Occurrences: | 52 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 5 | 3 | 1 | 4 | 38 |
| Occurrence Status: | |||||
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| Historical >20 Years | 40 | ||||
| Recent <=20 Years | 12 | ||||
| Presence: | |||||
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| Presumed Extant | 48 | ||||
| Possibly Extirpated | 3 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Lake (LAK), Marin (MRN), Mendocino (MEN), San Francisco (SFO), San Mateo (SMT), Sonoma (SON) |
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Quads: Name (Quad Code) Arched Rock (3812342), Bodega Head (3812331), Bolinas (3712286), Camp Meeker (3812248), Cloverdale (3812371), Cotati (3812236), Glen Ellen (3812235), Healdsburg (3812257), Hunters Point (3712263), Inverness (3812217), Mark West Springs (3812256), Middletown (3812275), Novato (3812215), Noyo Hill (3912346), Oakland West (3712273), Petaluma (3812226), Petaluma River (3812225), Point Bonita (3712275), Point Reyes NE (3812227), San Francisco North (3712274), San Francisco South (3712264), San Geronimo (3812216), San Rafael (3712285), Santa Rosa (3812246), Sebastopol (3812247), Sonoma (3812234), Tomales (3812228), Two Rock (3812237), Valley Ford (3812238), Warm Springs Dam (3812361) |
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Notes:
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Presumed Extant
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