Agrostis pittieri Hack.

Agrostis pittieri Hack. Oesterr. Bot. Zeits. 52: 60. 1902
Perennial; culms cespitose, ascending, slender, glabrous, 2-noded, 30-50 cm. tall; sheaths glabrous; ligule 2-4 mm. long; blades of innovations slender, involute, flaccid, scabrous, 6—10 cm. long, those of the culm sometimes flat, 1 mm. wide; panicle purple, narrow, rather lax, 1015 cm. long, the axis glabrous, the branches suberect, scabrous, unequal, the longer naked below, 5 cm. long, with short ones intermixed; glumes subequal, acute, scabrous on the keel, 3-3.5 mm. long; lemma about 2 mm. long, the callus short-pilose, awned from about the middle, the awn straight, mostly included in the glumes; palea about one fourth as long as the lemma.
Type locality: Volcano Poas, Costa Rica {Pittier 334, 790, 2985).
Distribution: Known only from Volcano Poas.