FESTUCE^. 447 



aa. Floral glumes 

 niembrauous or 

 herbaceous at 

 the base. . . 126 

 z. Floral glumes 



rounded ou the 

 back at least below, (bb) 

 bb. Palea scabrid 

 or minutely 

 fringed on the 

 keels. . . .133 

 bb. Palea pectinate 



on the keels . 135 



s. Stigmas below the apex. . 134 



97. (197). Pappophorum Schreb. Gen. PI. 2:787 (1791). 



Foli/raj^his Trin., Lindl. Veg. Kingd. 115 (1847). E^meapogoii 



Desv. Beauv. Agrost. 81 (1812). Eiwaphis Trin. Lindl. 1. c. 



Spikelets with one perfect flower and one or more male or rudi- 

 mentary flowers or empty glumes above it, in a dense and spikelike 

 or narrow and loose panicle, the rachilla articulate above the outer 

 glumes and hairy around the floral glume. Empty glumes mem- 

 branous, persistent, acute, keeled, 1-3- or many-nerved; floral 

 glume broad, subcoriaceous, convex on the back, obscurely many- 

 nerved, with 9-23 more or less plumose and unequal awns ; palea 2- 

 nerved, as long as its glume or longer. Styles short, distinct. 

 Grain ovoid or oblong, enclosed in the glume and palea, but not 

 adherent. 



Perennial (or rarely annual) grasses with narrow and often con- 

 volute leaf-blades. 



Species about 20, widely dispersed in warm regions. Folyra- 

 phis Trin. is an abandoned generic name for species in which the 

 floral glume has thirteen to twenty-three very unequal awns; and 

 Enneapogon is another one in which the floral glume has nine awns, 

 all nearly equal. 



1. P. apertum Munro, Scribn. Bull. Torr. Club, 9: 148 (1882). 

 A tufted erect perennial, 30-80 cm. high. Sheaths smooth, as 



