DESCRIPTIONS OF TRIBES AND GENERA. 201 



/?. Spikelets two- to many-flowered. 



I. Palea of the uppermost flower two-keeled ; 

 style not thickened at the base at maturity, 

 usually falling off. . . . 299. Bambusa. 

 IL Palea of the uppermost flower and flower- 

 ing glume one-keeled ; style much thick- 

 ened at the base at maturity ; fitting over 

 the caryopsis like a cap. 300. Atractocarpa. 

 b. Filaments grown together, forming a tube. 



a. Spikelets many-flowered, palese all two-keeled. 



3O1. Gigantochloa. 



/?. Spikelets one- to many-flowered, but only the 

 uppermost flower fertile, and this with a one- 

 keeled palea. 



I. Spikelets elongated conical, round in cross- 

 section 302. Oxytenanthera. 



II. Spikelets ovate-lanceolate, compressed. 



303. Puelia. 



C. Stamens six (very rarely more); fruit a nut (with a 

 thick, free paricarp) or berry. 

 a. Palese two-keeled (Dendrocalamece). 

 a. Spikelets two- to many-flowered. 



I. Ovary hairy at the apex ; fruit a small nut. 

 304. Dendrocalamus. 

 II. Ovary naked ; fruit large, fleshy (?). 



305. Melocalamus. 



ft. Spikelets one-flowered with a prolongation of 

 the rachilla which often bears an upper empty 

 glume ; fruit a nut. 



I. Spikelets in distant clusters or spikes on 

 the branches of the panicle. 

 1. Styles three, separate to the base. 



308. Greslania. 



2. Style one, very long, enclosed in a tubu- 

 lar beak of the ovary, with 2-3 stigmas. 

 * Nut almost globose, depressed, ab- 

 ruptly beaked. 3O6. Pseudostachyum. 

 ** Nut gradually tapering into the 

 beak. . . . 307. Teinostachyum. 

 II. Spikelets in one to several globose heads. 

 309. Cephalostachyum. 



