THE TRIBES AND THEIR GENERA. 



61 



Elymus. Spike stoutish. Spikelets sessile, containing more 

 than one floret. Terminal spikelet with two glumes on the same 

 side, one of them frequently aborted. Lateral spikelets in groups 

 of from two to six, all fertile. Glumes narrow, awnless, and with- 

 out bristles. Outer palea pointed, 

 awnless or awned, oblong or lan- 

 ceolate, with five nerves, not 

 keeled. Inner palea fringed. Lodi- 

 cules two, oblong, pointed, fringed. 

 Stamens three ; filaments slender, 

 very short ; anthers oblong, more 

 deeply notched at base than at 

 apex. Ovary turbinate. Styles 

 two, short. Stigmas feathery. Grain 

 adherent to paleae. 



Species. E. arenartus, 51. 



Elymus arenarius. 

 Floret. For Spikelet see p. 96. 



ORYZE^E 



Leersia. Panicle loose. Spikelets laterally compressed. 



Florets one. Glumes absent or represented by rudiments. 



Outer palea awnless, concave, keeled, generally fringed. Inner 



palea narrower than outer but 

 of same length. Lodicules lanceo- 

 late, acute. Stamens one, two, 

 three or six ; filaments short ; 

 anthers oblong. Ovary ovate, 

 compressed. Styles two, capillary, 

 short. Stigmas feathery, protrud- 

 ing near base of floret. Grain 

 obovate, compressed, enclosed in 

 paleae but not adherent. Starch 

 grains compound. 



Leersia ory:.uides. 

 Floret. For Spikelet see p. 



ioS. 



Species. L. oryzoides, 1. 



