Poa labillardierei

Tufted leafy perennial, culms erect, terete, rarely somewhat compressed below the panicle, to 130 cm high. Leaves scabrous; blade variably scabrous on the outer surface, scabrous pubescent on the inner surface; ligule truncate, firmly membranous, c. 0.5 mm long. Inflorescence an open pyramidal panicle, to 25 cm long and 15 cm wide. Spikelets mostly 3–5-flowered, 4–8 mm long, green or purplish; glumes 3-nerved (or the lower occasionally 1-nerved), the upper usually slightly longer than lower, mostly c. three-quarters as long as the lowest lemma; lemma 5-nerved, rather narrow (2.5–)c. 3(–4.5) mm long, usually hairy along the lower part of the keel and lateral nerves, occasionally sparsely hairy on the lower internerves or rarely, entirely glabrous; web usually strongly developed.