zovsiEj-:. 



69 



apex of anotluT vein becomes a imicronate awn ; floral glume 

 a-iu'i-ved for ouo-tliircl its length, broadly oval, tlieii abruptly eoii- 

 traeted, emarginate ; paloa narrow. 



Arizona, Lemmon for Nat. Mils. 415 ; Mexico (Jalisco), 

 raliiin- 2!)(). 



\'ar. longifolia Vasey. Leaves thin, numerous, erect, 8-ia 

 cm. long. 



Arizona, Wliccler's Survey 595; Lower California, P(th)ierU7. 



Var. ciliatus Scribu. iued. Spikes about 3 cm. long ; empty 



Fig. \Q.—IIilana cenehroides. A, B, C, spikelets. (Scribner.) 



glumes above strongly ciliatc, awns not extending beyond the lobes 

 of the glumes. 



Mexico, Pvingh 3128. 



Var. Texana A^-isey. Leaf-blades mostly 1-3 cm. long ; spikes 

 narrower. 



Texas. Rererclion 1173. Jen»i/ and XeaJJei/ for Nat. Mus. 

 3. H. mutica (Buck.) Benth. Jour. Linn. Soc. 10 : 63 (1881). 

 Plenrnphis mutica Buckl. Broc. Acad. Phila. 05 (1802). 



Plant smooth, light colored. Culm 40-60 cm. high. Ligule 



