This variable South American species ("dallis-grass") has been widely sown in warm regions of North America for forage and other mowed turf; 2n = 20 to 63 (FNA 25). It prospers locally along roadsides in southern regions of Ky. but remains virtually unknown along the state's northern borders. The first Ky. record comes from Pr (handwritten addenda) in the 1890s; see also Anderson (1924). P. dilatatum and P. urvillei are the only members of the genus in Ky. with distinctly long-pilose spikelets.