Mr. Woods ou the Genera of European Grasses. 31 



spicula. Paleœ tei-minating rather abruptly, and generally with a point 



or seta. 

 70. Secale. Glumes narrow. Palea gradually tapering into a long seta. Seed 



crested. Spiculoe solitary. 

 "1. ^^gilops. Glumes placed somewhat obliquely; these and the outer palea 



herbaceo-coriaceous, turgid, terminating in several stout setee. 



72. Eli/mus. Spiculie two or three together, all fertile. Glumes on one side. 

 47. Gaud'tnia. Glumes unequal, much shorter than the spicula. Outer palea 



with a geniculate and twisted dorsal awn. Rachis brittle. 



2. Spiculiie with only one perfect floret, all fertile, placed edgewise to 



the rachis, and when closed, imbedded in it so as to form a con- 

 tinued cylinder or prism. 



77- Lepfarus. Glumes 1 or 2 on the same side of the unarmed spiculte, which 



contains 1 perfect floret with an interior rudiment. 

 76. Psilurns. Glume 1, small, scariose. Palece of equal length, the outer 



with a terminal seta. Stamen 1 , 



3. Spicula? in threes, the lateral ones usually barren, none with more 



than one perfect floret. 



73. Hordeum. Glumes setaceo-aristate, both on one side of the spicula. A 



superior rudiment to all the spicula?, towards the rachis. 



Elyinus europœus. Sclcrocltloa Triticum, divaricata. 



D. Spicuke 1 -flowered, with additional scales, the rudiments of one or 

 more exterior florets. 



N.B. In Andropogon, Saccharani, Erianthus, and Imperata, from the deli- 

 cacy of the parts, it is often very difficult to distinguish the additional rudiment, 

 but these may be known from all European Grasses, not included in the pre- 

 ceding section, by the spiculte in twos or threes, of which one is sessile. 



1. Spiculae sessile and stalked, the latter barren. 



5. Sorghum. Spiculae oblong, or somewhat ovate. Glumes of the fertile 

 floret coriaceous, without striœ. Seed large, roundish. 



H 2 



