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Agrostis humilis
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Mountain Bent Grass
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Agrostis humilis
  

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About Mountain Bent Grass (Agrostis humilis) Agrostis humilis is a species of grass known by the common names of mountain bent grass and alpine bentgrass, which can be found in Western United States and Canada. The plant perennial and caespitose while it culms are 5-10 centimetres (2. 0-3. 9 in) long. The eciliate membrane have a 0. 5-1 millimetre (0. 020-0. 039 in) long ligule which is also both erose and truncate. It have filiformed and flat leaf-blades which are 2-10 centimetres (0. 79-3. 94 in) long and 0. 5-1 millimetre (0. 020-0. 039 in) wide. The panicle is inflorescenced and is 1. 5-2. 5 centimetres (0. 59-0. 98 in) by 0. 5 centimetres (0. 20 in) and is linear with the main branches being appressed. Spikelets are 2 millimetres (0. 079 in) long and are both elliptic and solitary. They also carry both a pediceled fertile spikelet and one fertile floret which have a hairless callus. The glumes are 2 millimetres (0. 079 in) long, lanceolate, membranous and have acute apexes. Fertile lemma is of the same size as glumes and is both elliptic and hyaline. It have hyaline palea which is 0. 66-0. 75 millimetres (0. 026-0. 030 in) long with rhachilla is extended at 0-0. 15 millimetres (0. 0000-0. 0059 in). Flowers are membranous and 0. 3 millimetres (0. 012 in) long with two lodicules. They also have three stamens which are 0. 6-0. 7 millimetres (0. 024-0. 028 in) long with fruits being caryopses, having an additional pericarp and linear. hilum. Threat status. In California, the plant is considered Endangered.
Plant Description
Plant Type
Grasses

Flower Color
Brown

Native Status
Natural Setting
Elevation ?
2713' - 12226'

Annual Precip. ?
12.2" - 111.9"

Summer Precip. ?
0.87" - 3.90"

Coldest Month ?
19.5° F - 46.6° F

Hottest Month ?
43.3° F - 69.3° F

Humidity ?
0.71 vpd - 19.35 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Alpine Bentgrass


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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