Species Details

Agrostis humilis

mountain bent grass

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Photo of Agrostis humilis
© 2004 Steve Matson
Photo of Agrostis humilis
© 2004 Steve Matson
Photo of Agrostis humilis
© 2004 Dean Wm. Taylor
CA Rare Plant Rank: 2B.3
Fed List: None
State List: None
Global Rank: G4Q
State Rank:
Other Status:
CRPR Changes:
changed from 2.3 to 2B.3 on 2013-02-22
Add Date: 1980-01-01
Date Edited: 2022-02-01
Lifeform: perennial herb
Blooming Period: Jul-Sep
2670 - 3200 meters
8760 - 10500 feet
General Habitats:
  • Alpine boulder and rock field
  • Meadows and seeps
  • Subalpine coniferous forest
Microhabitat Details:
  • Carbonate (sometimes)
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 MadroƱo 25(4):232 (1978) for first CA record.
Threat List Total: 6
Total EOs % of EOs
EOs with Threat Listed: 4 20 %
Foot traffic/trampling 2 10%
Other 2 10%
Road/trail construction/maint. 1 5%
Vandalism/dumping/litter 1 5%
Grazing 1 5%
Total Occurrences: 20
Element Occurrence Ranks:
0 2 1 0 0 17
Occurrence Status:
Historical >20 Years 8
Recent <=20 Years 12
Presumed Extant 20
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA), Colorado (CO), Idaho (ID), Montana (MT), Nevada (NV), New Mexico (NM), Oregon (OR), Utah (UT), Washington (WA), Wyoming (WY)
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)
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.
Presumed Extant
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