Poa incrassata

Detailed description

Diminutive, blue-green to grey-green, stoutly tufted, perennial grass 50–150 mm tall; branching extravaginal at plant base, intravaginal above; leaf-blades long peristent. Leaf-sheath lustrous, greenish or reddish purple, later light grey-brown, membranous, glabrous, ribs conspicuous. Ligule 0.2–0.7 mm, apically glabrous, entire, rounded centrally narrowed to a point, lower surface minutely papillose. Leaf-blade 10–90 × 0.6–2 mm, usually folded, underside smooth, though scabrid on midrib near curved apex, upperside glabrous through shortly hairy above ligule, occasionally with a few prickle-teeth on midrib, lateral ribs indistinct; margins inrolled, shortly prickle-toothed. Culm 20–160 mm, internodes usually short-scabrid below panicle, sometimes smooth. Panicle 5–30 mm, compact, spike-like or racemose (pendulous), rarely open with a few rather short branches; rachis and branches stiff, angular, densely scabrid, spikelets few on scabrid pedicels. Spikelets 2.5–3.5 mm, 2–4-flowered, light green tinged maroon or purple. Glumes subequal, 1.5–2.5 mm, glabrous, with sparse prickle-teeth on nerves in upper half; lower glume occasionally smaller 1–1.5 mm, 1–3-nerved, narrow- to ovate-elliptic, subobtuse to obtuse, upper 3-nerved, ovate, obtuse. Lemma 2.2.5 mm, 5–7-nerved, ovate, strongly folded about midnerve, obtuse, cucullate, minutely papillose or finely scabrid near distinctly membranous margin, midnerve scabrid towards apex. Callus glabrous. Anthers 0.2–0.5 mm, purple. Ovary 0.4–0.5 mm; stigma styles 0.75–1.1 mm. Seed 1–1.3 × 0.5 mm.