Muhlenbergia cenchroides (Humb. & Bonpl. ex Willd.) P. M. Peterson

Aegopogon breviglumis (Scribn.) Nash, sp. nov
Aegopogon geminiflorus breviglumis Scribn. Zee 4 : 386. 1894.
Stems 1-5 dm. tall, very slender; leaf-sheaths smooth and glabrous; blades usually 1-5 cm. long, rarely 1 dm., up to 1.5 mm. wide, glabrous, or sometimes puberulent on the upper surface; inflorescence 2-8 cm. long, sometimes interrupted below; spikelet-clusters 2.5-3 mm. long, exclusive of the awns and peduncle, of 2 or 3 spikelets, one spikelet sessile or short-pedicellate, perfect, the other 1 or 2 with longer pedicels, staminate or empty, sometimes rudimentary; empty scales short, 1 -nerved, the nerve running out into an awn 3 times as long as the scale or more, 2-toothed or 2-lobed at the apex, the teeth or lobes acute, the scales sometimes reduced to an awn only; flowering scale of the perfect spikelet 3-lobed at the apex, 3-nerved and 3-awned, the midnerve running out into a long awn usually 3-4 times as long as the scale, the lateral nerves very acute, awned, the awn several times as long as the lobe with usually an acute tooth at the base, the flowering scale of the other spikelets similar or sometimes reduced to awns.
Type locality : Saucito, I,ower California. Distribution ; I,ower Caliifornia, Jalisco, and Colima.

Aegopogon cenchroides H. & B.; Wilid. Sp. PL 4 : 899. 1806
Aegopogon geminiflorus H.B.K. Nov. Gen. & Sp. 1 : 133. 1815.
Hymenothecium triseium I^ag. Gen. Sp. PI. 4. 1816.
Hymenothecium quinquesetum I^ag. Gen. Sp. PI. 4. .1816.
Aegopogon irisetus R. & S. Syst. Veg. 2 : 805. 1817.
Aegopogon quinqueseius R. & S. Syst. Veg, 2 : 805. 1817.
? Aegopogon seiiferl<l^^s^ I^innaea 19 : 691. 1847.