Taxon Details
Panicum acuminatum var. thermale
Geysers panicum
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© Rick York and CNPS |
Taxon Summary:
Panicum acuminatum var. thermale, commonly known as Geysers panicum, is a annual/perennial herb in the Poaceae that is found only in California. It occurs within Closed-cone coniferous forest, Riparian forest, and Valley and foothill grassland, growing at elevations from 305 to 2470 meters. Panicum acuminatum var. thermale is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Panicum acuminatum Sw. var. thermale (Bol.) Wipff |
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Common Name: Geysers panicum |
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| Family: | Poaceae | |
| Element Code: | PMPOA24028 | |
| 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.2 |
| Fed List: | None |
| State List: | CE (1978-09-01) |
| Global Rank: | G5T2Q |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_UCSC |
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CRPR Changes: changed from 1B.1 to 1B.2 on 2012-09-12 |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: annual/perennial herb | ||||||||||||||
Blooming Period: Jun-Aug
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Elevation:
305 - 2470 meters 1000 - 8105 feet |
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General Habitats:
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| Microhabitat Details: geothermally-altered soil | ||||||||||||||
Microhabitat:
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Notes: Known only from The Geysers and Lassen Volcanic NP geothermal areas. Does plant occur on Mt. Shasta (SIS Co.)? Plants from Blaney Meadows (FRE Co.) need verification. Threatened by non-native plants. A synonym of Panicum acuminatum var. acuminatum in TJM (1993). See Proceedings of the California Academy of Sciences 2:181 (1862) for original description, Madroño 23(3):151 (1975) for taxonomic treatment, and Proceedings of the CNPS Conservation Conference, pp. 256-263 (2009) for information on population dynamics and monitoring. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 7 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 4 | 36 % |
| THREAT LIST: | ||
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| Mining | 4 | 36% |
| Development | 4 | 36% |
| Erosion/runoff | 4 | 36% |
| Non-native plant impacts | 3 | 27% |
| Other | 2 | 18% |
| Road/trail construction/maint. | 1 | 9% |
| Feral pigs | 1 | 9% |
| Total Occurrences: | 11 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 3 | 0 | 0 | 1 | 6 |
| Occurrence Status: | |||||
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| Historical >20 Years | 7 | ||||
| Recent <=20 Years | 4 | ||||
| Presence: | |||||
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| Presumed Extant | 10 | ||||
| Possibly Extirpated | 1 | ||||
| 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) Lake (LAK), Plumas (PLU), Shasta (SHA), Sonoma (SON), Tehama (TEH) |
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Quads: Name (Quad Code) Lassen Peak (4012145), Reading Peak (4012144), The Geysers (3812277), Whispering Pines (3812276) |
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Notes:
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Presumed Extant
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