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San Bernardino Bluegrass
Poa atropurpurea
  
About San Bernardino Bluegrass (Poa atropurpurea) Nurseries Show All Photos Poa atropurpurea is a rare species of grass known by the common name San Bernardino bluegrass. It is endemic to southern California, where it is known from two regions, the San Bernardino Mountains near Big Bear and the Laguna Mountains of San Diego County. It grows in wet mountain meadows. It is a rhizomatous perennial grass growing in small, loose tufts up to about half a meter tall. The firm, narrow leaves often have rolled or folded edges. It is a dioecious plant, with male and female individuals bearing different flower types. The flower cluster is somewhat lance-shaped, with branches appressed, spreading upwards along the stem axis. Male and female flower clusters look similar. They may hold up to 70 spikelets each, which are purplish in color. In the San Bernardino Mountains the grass occurs in the pebble plain habitat near Big Bear with other rare plant species. In San Diego County the grass has been observed on Palomar Mountain and in the meadows of Mount Laguna. There are fewer than twenty populations of this grass in existence and it is a federally listed endangered species of the United States.
Plant Description
Plant Type
Grasses

Max. Height
1.8 ft (0.5 m)

Flower Color
Brown

Native Status
Natural Setting
Site Type
Moist meadows

Sun
Part Shade

Elevation ?
4151' - 8781'

Annual Precip. ?
18.2" - 35.4"

Summer Precip. ?
1.63" - 2.77"

Coldest Month ?
32.2° F - 45.5° F

Hottest Month ?
56.3° F - 70.2° F

Humidity ?
2.44 vpd - 20.32 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
San Bernardino Blue Grass



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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