no Bulletin VII. 1. 



first one-nerved, the second three-nerved; flowering glume nar- 

 rowly ovate, acute, very faintly nerved, villous on the keel below 

 and with a narrow cobwebby tuft at the base. Palea two-nerved, 

 nerves scabrous. 



Summit of Roane Mountain and upper forks of the Tellico 

 river. May — June. 



9. Poa Wolfii Scribner. 



Plate XXXVIII. Figure 149. 



A slender perennial one to three feet high, with a loose nodding 

 panicle. Sheaths rather loose, mostly shorter than the internodes, 

 the lower scarious; ligule one-half a line long; leaf-blade three 

 to six inches long, one to two lines wide. Panicle slender, lax, 

 three to six inches long, primary branches two to three, rarely 

 more, at each node of the main rachis. Spikelets ovate, two to 

 three lines long, three- to five-flowered; empty glumes nearly 

 equal, three-nerved; flowering glumes strongly keeled, lanceolate, 

 five-nerved, silky-villous along the margins and keel and with a 

 copious long web at the base. Keels of the palea villous. This 

 grass has been confounded with P. alsodes and P. auiu??tnalis. It is 

 closely allied to the latter, but both empty glumes are three- 

 nerved, the flowering glumes are more acute and have a tuft of 

 long webby hairs at the base. 



Lavergne, in the cedar glades. May — June. (Gattinger.) 



10. Poa brevifolia Muhl. 



Plate XXXVIII. Figure 150. 



An erect perennial with a running root-stock, short culm-leaves, 

 very long radical leaves, and a widely spreading, few-flowered 

 panicle. Sheaths long, striate; ligule one-half to one line long; 

 leaf-blade about two lines wide and three to twelve inches long, the 

 uppermost culm-leaf one-half an inch long or less. Panicle pyra- 

 midal, the primary branches in clusters of two to six at each node 

 of the axis, widely spreading. Spikelets ovate-lanceolate, three to 

 four lines long, three- to six-flowered; empty glumes acute, slightly 

 unequal, the first one- the second three-nerved; flowering glume 

 about two lines long, lanceolate, with an acute scarious apex, five- 

 nerved, the keel and marginal nerves hairy, sparingly webbed at 

 the base. Palea two-nerved, nerves hairy. 



Along mountain slopes and river bluffs, East Tennessee. March 

 and April. 



11. Poa arachnifera Buckley. Texas Blue-grass. 



Plate XXXVIII. Figure 151. 



A rather strong growing perennial one to three feet high, with 

 an extensively-creeping root-stock, long leaves and narrow densely- 

 flowered panicle. Sheaths firm, striate, smooth; ligule about one 

 line long; leaf-blade flat, scabrous on the upper surface, smooth 

 beneath, the lower six inches to two feet long, the upper two to 

 four inches long, one to two lines wide, blunt-pointed at the apex. 

 Spikelets ovate-lanceolate, two to four lines long, three- to seven- 



J 



