VKaTUCEJS. 447 



aa. Floral ^'luinoA 

 luoiiilii'iirious or 

 lu'rl)acr(nis ul 

 the Inwe. . . I'.'O 

 z. Floral <,'lmiK's 



ruundod on the 

 buck lit U'Udt Ih'Iow. (bb) 

 bb. I'lili'ii rt('al)ri(l 

 or iiiimitcly 

 rriuj^L'd on the 

 keols. . . . i:}3 

 bb. I'lileiipcctiimtt! 



on the koels . I;j5 



s. Stifrnias below the jipex. . l;{4 



97. (197). PaPPOPHOEUM Sehreb. (ieii. I'l. '.' : 787 (17!)1). 



PohintjihiH Trill., Lindl. Vej^. Kiii^'d. 115 (1847). /'juni'd/iot/od 



Desv. Heauv. A<,'rost. 81 (181'.'). L'tirtfji/tis Triii. Liiidl. 1. (;. 



Si)ikelets with one perfect llower and one or more male or riidi- 

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

 or jiarrow and loose panicle, the rachilla articulate al)ovo the outer 

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

 branous, persistent, acute, keeled, l-'.\- or many-nerved; Iloral 

 glume broad, subcoriaccous, convex on the back, obs(!urely many- 

 nerved, with U-)i[i more or less plumose and unefpial awns; pulea *-i- 

 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. Poli/rn- 

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

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

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

 all nearly equal. 



1. P. apertum Mnnro, Scribn. Bull. Torr. Club, 9: 148 (188-,'). 

 A tufted erect perennial, ;}0-80 cm. high. Sheaths smooth, as 



