Muhly

Muhlenbergia macroura (^H.B.K.) Hitchcock
Crypsis macroura H.B.K. Nov. Gen. & Sp. 1: 140. 1815.
Cinna macroura [macrura] Kunth, Rev. Gram. 1: 67. 1829. (Based on Crypsis macroura H.B.K.)
Crypsis selifolia Presl, Rel. Haenk. 1: 245. 1830. (Type from Mexico, Haenke.)
Cinna selifolia Kunth. Rev. Gram. ,Suppl. xvi. 1830. (Based on Crypsis selifolia Presl.)
Epicampes macroura Benth. Jour. Linn. Soc. 19: 87. 1881. (Ba-sed on Cinna macroura Kunth.)
Crypsinna selifolia Foum. Mex. PI. Gram. 90. 1886. (Based on Crypsis selifolia Presl.)
Perennial; culms densely cespitose in large bunches as much as 1 m. in diameter, erect, glabrous, scaberulous just below the panicle, several-noded, the uppermost node 30-50 cm. below the panicle, 1-1.5 meters tall; sheaths glabrous or slightly rough to the touch, all except the lower elongate; ligule truncate, much broader than the base of the blade, decurrent as a broad wing on each side of the sheath, 1-2.5 cm. long or even longer, the lower ones shorter; blades elongate, fiat or more or less involute, scabrous, 1-5 mm. wide, tapering into a fine point, panicle dense, spikelike, erect, plumbeous or olive, 15-30 cm. long, about 5 mm. thick, the axis sulcate, scabrous, the branchlets short, slender, appressed and closely set on the axis, the pedicels scabrous-pubescent; spikelets compressed; glumes about equal, narrow, acute, scaberulous on keel and back, about 4 mm. long; lemma a little shorter than the glumes, narrow, 3-nered, acute, scabrous, the palea about as long as the lemma.
Type loc.lity: Toluca, Mexico.
Distribution: Open slopes and open woods, on the higher mountains, alt. about 3000 m., southern Mexico.