California Native Plant Society
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Aristida purpurea var. longiseta
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Red Three Awn
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Aristida purpurea var. longiseta

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About Red Three Awn (Aristida purpurea var. longiseta) Red Three Awn (Aristida purpurea var. longiseta) is a native grass that grows in southern and central California. It is fast growing and moderately long-lived. It grows in an upright form to a height of 1.4 feet, with active growth during the fall, winter and spring. Flowers are yellow and bloom in the early spring. Leaves are medium green and deciduous. It tends to grow in sandy rocky soils, slopes and plains, at elevations from 1000-5200 feet.
Plant Description
Plant Type

Max. Height
1.4 ft (0.43 m)


Growth Rate

Winter Deciduous

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Sandy rocky soils, slopes, plains


Elevation ?
2555' - 6178'

Annual Precip. ?
5.8" - 27.2"

Summer Precip. ?
0.76" - 2.78"

Coldest Month ?
32.9° F - 53.3° F

Hottest Month ?
62.6° F - 79.3° F

Humidity ?
2.62 vpd - 30.46 vpd

Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.


Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Fendler Threeawn

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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