002 POACE^. 



lanceolate, 5-12-flowered, raeliilla pubescent with short silky hairs; 

 glumes with prominent green nerves, first empty glume 4 mm. 

 long, ovate, 3-nerved, second 5.5 mm. long, oval when spread, 

 7-nerved; floral glume pubescent at tlie base, 7-nerved. ovate- 

 cuneato, apex obtuse; palea softly pubescent, nearly 4 mm. long. 

 Anthers ovate, 0.7 mm. long. 

 Texas, Ncalhy for Nat. Mus. 



7. M. diffusa Pursh, Fl. Am. Sept. 1 : 77 (1814). M. aUissima 

 Walt. Fl, Car. 78 (1788), not L. M. mntica var. dipisa A. Gray, 

 Man. Ed. 2:558 (1856). 



Culms rather stout, 80-120 cm. high. Sheaths about the 

 length of the internodes ; lignle white, lacerate, 4 nun. long ; 

 blfides 5 in number, flat, slightly scabrid, about 15 cm. long, 6-8 

 mm. wide. Panicle linear or becoming oval, 20 cm. long, rays 

 mostly in threes, the longest 5-7 cm. long, bearing a few spikclets 

 above tlie middle. Spikelots borne on weak flexuose or bent i)edicels, 

 2-3-flowered with one or more rudiments, longest joint of rachilla 

 2.5 mm. long : first empty glume 7 mm. long, broadly oval, 5-7- 

 nerved (if 7-nervod the lateral nerves obscure), second obovate- 

 obloug, mm. long, scarcely acute, 5-nerved; floral glume 9 mm. 

 long, ellii)tical, 7-nerved above, 21-uerved below; palea spatulate- 

 oval, 7 mm. long. 



Pennsylvnnia, T. C. Porter ; Kentucky, C. W. Short ; New 

 Mexico, Wriffht 2062. 



Pennsylvania, Texas, Arizona, and ^fexico. 



Yar. nitens Scribn. Proe. Pliila. Acad. 44 (1885). 



" It differs from the species in its more leafy culms, narrower 

 leaves, more densely flowered panicle, and in its much l)roader and 

 more unequal outer glumes, the second one being nearly as long as 

 the spikolet." Scribner, 1. c. 



Texas, Reverclioii, Curtiss 3464a, NeaUcii; New Mexico, Wright 

 2063, JoHcs 4334 ; Arizona, Pringle, Rothrock 805 ; Kocky 

 Mountains, IlnlJ t(- Harbour 228. 



Texas, Nebraska, Colorado, Arizona. 



8. M. parviflora (Porter) Scribn. Mem. Torr. Club, 6:50 

 (1895). J/, iitutica var. parviflora Porter, Porter & Coulter, Fl. 



