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Tufted perennial 300-800 mm high, geophytic with a swollen hairy underground base; stolons horizontal; basal sheaths forming a sheath of burnt-off leaf bases, base densely hairy with long straight adpressed hairs; leaves basal; linear glands present on pedicels. Leaf blade to 250 x 1.0-2.5 mm, expanded, rigid; margins scabrid. Inflorescence open, 50-120 x 20-80 mm, with up to ±200 spikelets; pedicels not hidden by spikelets, glabrous; axils glabrous or hairy. Spikelet 9-12 mm long; glumes straw-coloured or silvery, glabrous or scaberulous along keels; lemma 4-5 mm long, glabrous, rarely hairy all over, hairs up to 0.1 mm long; lobes small; lateral awn 8-10 mm long, exserted from glumes; central awn 15-20 mm long; palea hairy all over; anthers 2.7-3.0 mm long.
Like P. viscidula but stoloniferous, culm not swollen at base, leaf blades glabrous.
