Mr. Woods on the Genera of European Grasses. 51 



spicula. Paleae terminating rather abruptly, and generally with a point 

 or seta. 



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

 crested. Spiculse solitary. 



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



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



72. Elymus. Spiculee two or three together, all fertile. Glumes on one side. 

 47. Gaudinia. Glumes unequal, much shorter than the spicula. Outer palea 



with a geniculate and twisted dorsal awn. Rachis brittle. 



2. Spiculae 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. 



TJ. Lepturus. Glumes 1 or 2 on the same side of the unarmed spiculae, which 



contains 1 perfect floret with an interior rudiment. 

 76. Psilurus. Glume 1, small, scariose. Palese of equal length, the outer 



with a terminal seta. Stamen 1 . 



3. Spiculae 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 spiculae, towards the rachis. 



Elymus europaus. Sclerochloa Triticum, divaricata. 



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

 more exterior florets. 



N.B. In Andropogon, Saccharum, 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 spiculae in twos or threes, of which one is sessile. 



1. Spiculse sessile and stalked, the latter barren. 



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

 floret coriaceous, without striae. Seed large, roundish. 



h2 



