66 



PANIC ACE.E. 



b. Clusters of spikelets socund along the main axis, the 

 terminal one in each group fertile, with delicate empty 



glumes (17) 



b. Clusters of spikeh^ts not secund, the terminal one in each 



group sterile ; first empty glume minute, the second large 



and coriaceous with hooklike spines on the back. (18) 



B. Spikelets few, clustered in the axils of tlie upper leaf-sheaths, 



1-flowered: t-mpty glume 1, Uoral glume awned. . . (19) 



15. ((Jo). AnthephORA Schreb. Beschr. Griis. 2 : 105, t. 44 

 (1772-7!)). JInpiKlit'iinus Keichb. Norn. 37 (1841). Antcphora 

 Steud. Syn. PL Gram. Ill (1855). 



Fig. 15. — Anthplioni tUganx. A, siiikclins; a, Horet. (Scribner.) 



Spikelets l-flowered, :}-4 together, of whieli 1-2 are perfect, 

 2-3 sterile ; eacli group surrounded by a hard involucre consisting 

 of the first empty glumes of each spikelet, the groups falling olf 

 entire from the fiexuose rachis of the single terminal spike. 



First glume minute, second largest, third small, floral glume 

 and palea smooth, firmer, and olu'om pressed. Stamens 3. Styles 

 slightly united at the base. Grain obcom))ressed, ovate to oblong, 

 enclosed by the glume and ])alea. but not adherent. 



Tufted, brandling grasses, with Hat leaf-blades. 



