ie, de kh i ee 
GRAMINEA : 7 
1-3 imperfect ones. 
39 Distichlis Flowers diwcicus: flowering glumes much compressed 
laterally, many-nerved, somewhat coriaceous. 
++ ++ ++ Glumes 1-3-nerved. 
40 (Catabrosa Glumes membranous, erose- -truncate. 
41 Graphephorum Rachella hirsute with stiff hairs, extended into a 
hairy appendage: flowering glumes membranous. 
‘42 Panicularia Spikelets several-flowered deciduous, the rachella 
_ breaking up into joints: flowering glymes rounded on the back, the 
5-7 nerves not reaching the scarious mostly obtuse apex. 
48 Puccinellia Flowering glumes chartaceous, conyex on the back, 
faintly 2-nerved, the nerves not reaching the obtuse -subdenticulate or 
or mucronulate apex. 
44 Pleuropogon: Flowering glumes chartaceous,. several: ‘nerved, the 
nerves not reaching the truncate awned apex. 
45 Poa Flowering glumes laterally compressed, mostly Leaked; 5-nerved, 
membranous, the margins or nerves below. with cobweby. hairs or pu- 
-bescent: palet falling with the glume. 
46 Eragrostis Flowering glume 3-nerved, keeled, derideons: leaving 
the persistent palet. 
* * * Spikelets several-flowered : lowest flowers all pes gs i grain 
adherent to the palet. 
47 Briza Spikelets somewhat heart- shaped : <agane | glumes rounded, 
many-nerved, becoming ventricose. 
48 Festuca Spikelets flattish: flowering glumes ebinitza on the back, 
_few-nerved, pointed or awned at the tip: ovary mostly smooth. 
49 Bromus Spikelets flattened: flowering glumes convex to compressed, 
mostly awned below the tip: ovary pubescent. 
“Tripe vit Horperar, Spikelets one- to several-flowered, ses- 
sile in alternate notches on the opposite sides-of a zigzag rachis, 
either solitary or several together. 
* Spikelets single at each joint of the rachis. 
7 50° Scribneria Spikes slender, solitary: spikelets 1- Hower ‘almost em- 
bedded in the notches of the rachis. 
51 Lotium Spikelets several-flowered, placed with ine edge next to the 
rachis: the inner glumes wanting except the terminal one. 
62 Agropyron Spikelets 3- to several-flowered, placed flatwise on the 
rachis: both glumes present, standing right and left: . : a 
* * Spikelets 2 or more at each joint of the rachis: glimes anterior, 
forming a sort of involucre to the spikelet. « 
- 68 Hordeum Spikelets 1- to several- flowered, in' three’ 8 at: each joint : 
lateral spikelets usually sterile. aT 
_ 64 opeee Spikelets 1- to several-flowered, 2-4 at each Joti, ‘all perfect 
similar : glumes shorter than the spikelets: floweritig eat not 
long-awned. 
55 Sitanion Spikelets 1- toseveral-flowered; 2-4 ateach joint; ail perfect : 
glumes very long, usually 2-parted to the base and lonig-awned : flow- 
ering glumes long-awned and 2- ‘toothed, or ae awned. OBESE 
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