44 



THE TRIBES AND THEIR GENERA. 



Panicle diffuse ; leaves reversed at base so that the upper side 

 is really the under side. 



Species. M. effusum, 2. 



Phleum. Panicle spike-like. Glumes oblong, linear-lanceolate, 

 compressed, nearly equal, pointed or awned. Paleae shorter, con- 

 cealed within the glumes, awnless and very thin ; sometimes a 



minute awn on the back of outer palea, 

 or a bristle at base of inner palea. Inner 

 palea with two ribs. Lodicules ovate, 

 concave, acute. Stamens three ; anthers 

 oblong ; filaments capillary, longer than 

 glumes. Styles two ; stigmas feathery 

 with short branches, protruding from 

 apex of spikelet. Grain roundish, envel- 

 oped by paleae but not united to them . 



Species. P. pratense, 13 



Phleum pratense. 

 Floret. 

 For Spikelet see p. 12 



P. alpinum, 14. 

 P. boehmeri, 15. 

 P, asperum, 16. 

 P. arenarium, 17 , 



Alopecurus. Glumes equal, ovate-lanceolate, concave, com- 

 pressed, connate at base, awnless. Outer 

 palea thin, ovate-lanceolate, concave, with 

 a slight, bent, dorsal awn and fringed 

 on keel. Inner palea often absent. No 

 lodicules. Stamens three ; filaments flat- 

 tened at base ; anthers forked at each 

 end. Ovary roundish ; styles capillary, 

 united at base ; stigmas with short branches 

 protruding from apex of spikelet ; grain 

 loose or not enclosed. 



Species. A. agrestis, 18. 

 A. pratensis, 19. 

 A . geniculates, 20. 

 A. alpinus, 2i« 



Alopecurus agrestis. 



Floret. 



For Spikelet see p. 73. 



