Aristida ramosa (common name Purple wiregrass) is a species of grass (in the family Poaceae) that occurs in New South Wales, Victoria, Western Australia and Queensland. However, it is thought to have been introduced into Western Australia. It was first described by Robert Brown in 1810 who find it live at Port Jackson (Sydney). The species epithet, ramosa, is a Latin adjective meaning "branched" which describes the plant as bearing branches.

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