632 



POACE^. 



distichous in the excavations of the jointed rachis. Eachilla very 

 short, articulate above the lower glumes, extending as a short awn 



Fig. 118. — Jouvea strnminea. ^.pistillate spikelets ; a, portion of staminate 

 inflorescence ; h, two-flowered pistillate spilte ; d, staminate floret ; e, floral 

 glume of same ; c, grain. (Scribner.) 



above the flowers, which are perfect or the upper one imperfect. 

 Empty glumes 1-2, persistent, narrow, firm, acute, 5-nerved ; the 

 floral glume much shorter, slender, hyaline; palea hyaline, 2-nerved. 

 Stamens 3 or fewer. Styles sliort, distinct, distant, stigmas feathery. 

 Grain narrow, glabrous, enclosed by the glumes, but not adherent. 

 Low branching annuals or sometimes taller and perennial, blades 



