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Aristida purpurascens
Species of grass From Wikipedia, the free encyclopedia
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Aristida purpurascens is a species of grass known by the common name arrowfeather threeawn. It is native to eastern North America. One of the three varieties has a distribution extending south into Honduras.[1]
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Description
A. purpurascens tolerates moderate shade.[2] It lacks rhizomes. The leaf blades are hairless, pale green, and up to 25 centimeters in length. They may become curly with age.[3] The panicle-shaped inflorescence has branches appressed to the stem, making it narrow. The awns may be up to 2.5 centimeters in length.[1] Individuals tend to be between 0.46 meters to 0.61 meters (1.5 to 2.0 feet) in height.[2] A. purpurascens possesses fibrous roots, which have a nonstructural carbohydrate concentration of 69.5 milligrams and a below-ground to aboveground biomass ration of 0.49.[4]
A. purpurascens is primarily found in dry habitats, including but not limited to: dunes, fields, and pine savannas.[5] Within reestablished longleaf pine woodlands, A. purpurascens may be used as an indicator species due to its ability to regrow in areas previously disturbed by agricultural practices.[6]
This species tends to increase in frequency in response to understory burning, particularly within longleaf pine savannas.[7]
This plant may be grazed when young but as it ages it becomes low in quality and even dangerous for livestock because of the sharp spikelets.[3]
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References
External links
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