CXIII. GEAMINE.E 
577 
Stems 6-10 ft., erect. Leaves 1-2 ft., flat, broad. Spikelets J-f in., hairy, 
3-8-flowered, forming large, dense, erect, shining, silky panicles. 
Rhachilla glabrous. Lowest flower 2-sexual. Empty 
glumes as long as the spikelet, nearly equal. Flower- 
ing glume covered on the lower half with long hairs, 
tip 2-lobed, shortly awned . . . . .39. Arundo. 
Rhachilla densely hairy. Lowest flower male. Empty 
glumes shorter than the spikelet, very unequal. 
Flowering glume of fertile flowers narrowed into 
a long point ........ 40. Phragmites. 
Empty glumes much shorter than the lowest flowering 
glume, very unequal. Flowering glume bearded at 
the base, fringed, tip bifid, shortly awned. Lowest 
flower 2 sexual ........ 41. Neyraudia. 
Stems 1-4 ft. Spikelets glabrous or nearly so, in panicles or spicate in Brachy- 
podimn and Eragrostis ncirdoides. 
Spikelets awned. 
Spikelets ^ in.. 3-5-flowered, flattened, in one-sided, 
ovoid clusters. Flowering glume rigid, 5-nerved, 
shortly awned. Ovary glabrous .... 45. Dactylis. 
Spikelets in., 3-8-flow'ered. Flowering glume 
ending in an awn, tip not notched. Ovary glabrous 
or slightly hairy on the top . . . . .48. .Festuca. 1 
Spikelets f-1^ in., 7-14-flowered. Tip of flowering 
glume notched, awned. Ovary densely hairy on the 
top . . . . . . . . .49. Bromus. 
Spikelets f-2 in., 6-18-flowered. Tip of flowering 
glume narrowed nto a slender awn. Ovary densely 
hairy on the top ....... 50. Brachypodium. 
Spikelets awnless. 
Flowering glume 3-nerved. 
Spikelets minute or rarely f in., several- or many- 
flowered. Rhachilla not prolonged . . . 43. Eragrostis. 
Flowering glume more than 3-nerved. 
Spikelets in., 2-4-flowered, crowded. Rhachilla 
prolonged, tip naked. Flowering glume 5-nerved 
at the base. Ovary glabrous . . . . 42. Koeleria. 
Spikelets | in., 3-5-flowered. Rhachilla-tip 
bearing two or three rudimentary glumes. 
Flowering glume acute, 7-9-nerved. Ovary 
glabrous ........ 44. Melica. 
Spikelets in., 2-7-flowered. Rhachilla pro- 
longed, tip naked. Flowering glume acute, 
usually hairy near the base. Ovary glabrous . 46. Poa. 
Spikelets I in., usually 4-flowered. Rhachilla 
prolonged, tip naked. Flowering glume blunt, 
7 -nerved. Ovary glabrous 47. Glyceria. 
Spikelets ^ in., 3-4-flowered. Flowering glume 
acute, 5-7-nerved. Ovary hairy on the top . 48. Festuca.- 
Tribe IX. Hordese. Spikelets three- to many-flowered, flat- 
tened, solitary, sessile in notch-like grooves and alternate on the 
rhachis of a simple spike. 
Spikelets in., placed edgewise to the rhachis. 
Empty glume only one, except in the terminal spike- 
let. Ovary glabrous . . . . . .51. Lolium. 
1 Except F. modesta. 2 F. modesta only. 
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