Taxon Details
Agrostis humilis
mountain bent grass
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© 2004 Steve Matson |
© 2004 Steve Matson |
© 2004 Dean Wm. Taylor |
Taxon Summary:
Agrostis humilis, commonly known as mountain bent grass, is a perennial herb in the Poaceae that is found in California and elsewhere. It occurs within Alpine boulder and rock field, Meadows and seeps, and Subalpine coniferous forest, growing at elevations from 2670 to 3200 meters. Agrostis humilis is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.|
Scientific Name: Agrostis humilis Vasey |
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Common Name: mountain bent grass |
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| Family: | Poaceae | |
| Element Code: | PMPOA040P0 | |
| USDA Plants Symbol: | AGHU | |
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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: | 2B.3 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G4Q |
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State Rank: |
S2 |
| Other Status: | |
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CRPR Changes: changed from 2.3 to 2B.3 on 2013-02-22 |
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| Add Date: | 1980-01-01 |
| Date Edited: | 2022-02-01 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: Jul-Sep
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Elevation:
2670 - 3200 meters 8760 - 10500 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: To be expected elsewhere in CA; need field surveys. Threatened by foot traffic and vehicles. Possibly threatened by grazing and trampling. Similar to A. variabilis and intergrades with A. thurberiana. Different circumscription here than TJM 2, which includes A. thurberiana (a common taxon) as a synonym. See Bulletin of the Torrey Botanical Club 10(2):21(1883) for original description and Madroño 25(4):232 (1978) for first CA record. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 6 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 4 | 20 % |
| THREAT LIST: | ||
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| Foot traffic/trampling | 2 | 10% |
| Other | 2 | 10% |
| Road/trail construction/maint. | 1 | 5% |
| Vandalism/dumping/litter | 1 | 5% |
| Grazing | 1 | 5% |
| ORV activity | 1 | 5% |
| Total Occurrences: | 20 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 0 | 2 | 1 | 0 | 0 | 17 |
| Occurrence Status: | |||||
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| Historical >20 Years | 15 | ||||
| Recent <=20 Years | 5 | ||||
| Presence: | |||||
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| Presumed Extant | 20 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA), Colorado (CO), Idaho (ID), Montana (MT), Nevada (NV), New Mexico (NM), Oregon (OR), Utah (UT), Washington (WA), Wyoming (WY) |
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California Counties and Islands: Name (Code) Alpine (ALP), Madera (MAD), Mariposa (MPA), Mono (MNO), Tuolumne (TUO) |
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Quads: Name (Quad Code) Dunderberg Peak (3811913), Ebbetts Pass (3811957), Koip Peak (3711972), Lake Eleanor (3711987), Merced Peak (3711964), Mount Dana (3711982), Sonora Pass (3811936), Tenaya Lake (3711974), Tioga Pass (3711983), Tower Peak (3811925), Vogelsang Peak (3711973), Yosemite Falls (3711975) |
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Notes:
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Presumed Extant
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