Poa affinis is a tussock grass, found near Sydney and the Blue Mountains in Australia. A moderately common plant found growing on soils based on sandstone.Les Robinson - Field Guide to the Native Plants of Sydney, page 274 It first appeared in scientific literature in 1810, in Prodromus Florae Novae Hollandiae, authored by the prolific Scottish botanist, Robert Brown. The specific epithet affinis means "similar to others".
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