Taxon Report
Agrostis humilis Vaseymountain bent grass |
 © 2004 Steve Matson |
Classification
|
Scientific Name: |
Agrostis humilis Vasey |
|
Common Name: |
mountain bent grass |
| Family: | Poaceae |
| Element Code: | PMPOA040P0 |
| USDA Plants Symbol: | AGHU |
|
Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jul-Sep | Jul-Sep |
| Elevation: | 2670-3200 (8760-10500) |
| General Habitats: | Alpine boulder and rock field, Meadows and seeps, Subalpine coniferous forest |
| Microhabitat: | Carbonate (sometimes) |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 2B.3 |
| Global Rank: | G4Q |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 20 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 2 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 17 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Alpine (ALP), Madera (MAD), Mariposa (MPA), Mono (MNO), Tuolumne (TUO) | |
| 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) | |
Threat List Data from the CNDDB
| Threat List Total: | 6 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 4 | 20 % | |
| 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% |
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: |
Selected References
| Proposal to keep at Rank 2.3, G4 / S2 (2016) |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].