77. 
76. 
73. 
Mr. Woops on the Genera of European Grasses, 51 
spicula. Palez terminating rather abruptly, and generally with a point 
or seta. 
. Secale. Glumes narrow. Palea gradually tapering into a long seta. Seed 
crested. Spiculæ solitary. 
. ZEgilops. Glumes placed somewhat obliquely ; these and the outer palea 
herbaceo-coriaceous, turgid, terminating in several stout setze. 
. Elymus. Spicule two or three together, all fertile. Glumes on one side. 
. Gaudinia. Glumes unequal, much shorter than the spicula. Outer palea 
with a geniculate and twisted dorsal awn. Rachis brittle. 
2. Spiculz 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. 
Lepturus. Glumes 1 or 2 on the same side of the unarmed spicule, which 
contains 1 perfect floret with an interior rudiment. : 
Psilurus. Glume 1, small, scariose. Paleæ of equal length, the outer 
with a terminal seta. Stamen 1. 
3. Spiculæ in threes, the lateral ones usually barren, none with more 
than one perfect floret. 
Hordeum. Glumes setaceo-aristate, both on one side of the spicula. A 
superior rudiment to all the spiculæ, towards the rachis. 
Elymus europeus. Sclerochloa Triticum, divaricata. 
D. Spiculæ 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 spiculæ in twos or threes, of which one is sessile. 
1. Spiculæ sessile and stalked, the latter barren. | 
5. Sorghum. Spicule oblong, or somewhat ovate. Glumes of the fertile 
floret coriaceous, without striæ. Seed large, roundish. 
H 2 
