No. 2. 



PANICUM URVILLEANUM Kth. Eev. Gram. i. 35,402; ii. t. 115. 



Plant perennial from strong rootstock. 



Culm erect, simple, nearly smooth, terete, 1£ to 2 feet high, the short-jointed base 

 covered with weather-worn sheaths. 



Leaves of culm 1 to 7 ; sheaths loose and overlapping, retrorse-velvety ; blades 

 at length convolute, slender-pointed, striate, glabrous, or pubescent beneath near 

 the base, upper one exceeding the panicle, 12 to 18 inches long; ligule a line ot soft 

 hairs £ hue long. 



Inflorescenee an open panicle 6 to 10 inches long and half as wide; ascending 

 branches subverticillate or scattered, racemose and flower-bearing near the ends, or 

 shorter ones flower-bearing throughout. 



8pikelets pedicellate, 2-fiowered, ovate, acute, 2£ to 3 lines long; empty glumes 

 broadly ovate, acute, convex, silky- villous ; first glume 7 -nerved, 2 to 2£ lines long; 

 second glume 13-to 15-nerved and one third longer; floral glume of staminate flower 

 pubescent, 11-to 13-nerved, 2^ lines long; palet lanceolate, thin, 2^ lines long; floral 

 glume of pistillate flower hardened, smooth except the ciliate margins, 5-nerved, 2 

 lines long; palet smooth, 2-nerved, 2 lines long. 



Plate II ; a, spikelet slightly spread and enlarged about 4 times ; b, first empty 

 glume; e, second empty glume; d, floral glume of perfect floret; e, palet of perfect 

 floret; /, floral glume of sterile floret; //, palet of sterile floret. 



Southern California and Arizona. Plainly distinguished by its large wooly spike- 

 lets. 



