Calamagrostis guatemalensis Hitchc.

Calamagrostis guatemalensis Hitchc. Proc. Biol. vSoc. Wash
40: 82. 1927.
Culms erect from a creeping base, 30-60 cm. tall; sheaths glabrous or slightly scaberulous; ligule 3-5 mm. long; blades numerous on lower part of plant, firm, flat becoming involute, scabrous on both surfaces, 1-3 mm. wide; panicles narrow, condensed, sometimes interruptedly spikelike, purplish or brownish, 7-12 cm. long, the branches ascending or appressed, fioriferous nearly to the base, as much as 3 cm. long; glumes equal, acute, scaberulous, 4—5 mm. long; lemma minutely scaberulous, 4 mm. long, the narrow apex with 4 fine teeth, the callus-hairs about half as long as the lemma; awn attached less than 1 mm. above base, the twisted straight part nearly as long as the lemma, the terminal part bent sharply to one side, 3-6 mm. long; rachilla a little more than 1 mm. long, clothed with hairs about 2 mm. long.
Type locality: Volcan de Agua, Guatemala {Hitchcock 9120). Distribution: Mountains of Guatemala.