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Scientific Name: Poa rhizomata Hitchc. |
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Common Name: timber bluegrass |
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| Family: | Poaceae | |
| Element Code: | PMPOA4Z250 | |
| USDA Plants Symbol: | PORH | |
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.3 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G3G4 |
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State Rank: |
S3S4 |
| Other Status: | |
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CRPR Changes: changed from 4.3 to 1B.3 on 2024-02-01 |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2024-02-06 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: Apr-Jul
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Elevation:
520 - 2040 meters 1705 - 6695 feet |
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General Habitats:
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| Microhabitat Details: Semi-shaded moist slopes, small openings in forest | ||||||||||||||
Microhabitat:
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Notes: Extremely rare and threatened in OR. |
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Threats: Potentially threatened by logging, inappropriate grazing, trampling, and fire changes in fire regime. |
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Taxonomy: Plants on ultramafic substrates in DNT Co. are referable to Poa piperi (previously treated as a taxonomic synonym of P. rhizomata). Other similar species are P. pratensis (nonnative naturalized in CA) and P. chambersii (OR endemic). |
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| Threat List Total: | 0 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 0 | 0 % |
| THREAT LIST: | ||
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| Total Occurrences: | 0 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 0 | 0 | 0 | 0 | 0 |
| Occurrence Status: | |||||
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| Historical >20 Years | 0 | ||||
| Recent <=20 Years | 0 | ||||
| Presence: | |||||
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| Presumed Extant | 0 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA), Oregon (OR) |
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California Counties and Islands: Name (Code) |
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Quads: Name (Quad Code) |
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Notes:
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Map
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Presumed Extant
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| CNPS Status Review: | Poa rhizomata Proposed Change from CRPR 4.3 to 1B.3 (2024) |
| Original Description: | Flora of California [Jepson] 1(3): 155 (1912) |
| Species Account: | USFS Potential Species of Conservation Concern Profile (2021) |