Species Details
Cirsium hydrophilum var. hydrophilum
Suisun thistle
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Scientific Name: Cirsium hydrophilum (Greene) Jeps. var. hydrophilum |
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Common Name: Suisun thistle |
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| Family: | Asteraceae | |
| Element Code: | PDAST2E1G1 | |
| USDA Plants Symbol: | CIHYH | |
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1997-11-20) |
| State List: | None |
| Global Rank: | G2T1 |
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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: perennial herb | ||||||||||||||
Blooming Period: Jun-Sep
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Elevation:
0 - 1 meters 0 - 5 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
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Microhabitat:
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Notes: Rediscovered in 1989 by N. Havlik on Grizzly Isl. in the Suisun Marsh; now known from two occurrences. Threatened by altered hydrology and competition from native and non-native plants. Potentially threatened by foot traffic and trampling by cattle. Protected in part at Grizzly Island WA and Peytonia Slough ER (both DFG). See Proceedings of the Academy of Natural Sciences of Philadelphia 44:358 (1892) for original description. |
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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: | 4 | 100 % |
| THREAT LIST: | ||
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| Foot traffic/trampling | 3 | 75% |
| Grazing | 3 | 75% |
| Non-native plant impacts | 3 | 75% |
| Hybridization | 2 | 50% |
| Improper burning regime | 1 | 25% |
| Non-native animal impacts | 1 | 25% |
| Altered flood/tidal/hydrologic regime | 1 | 25% |
| Feral pigs | 1 | 25% |
| Total Occurrences: | 4 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 1 | 1 | 1 | 0 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 2 | ||||
| Recent <=20 Years | 2 | ||||
| Presence: | |||||
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| Presumed Extant | 4 | ||||
| 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) Solano (SOL) |
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Quads: Name (Quad Code) Denverton (3812128), Fairfield South (3812221) |
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Notes:
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Presumed Extant
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