66. Scolochloa. Spikelets subterete, in a lax panicle, the rhachis villous at the base of the flowers, ending in a naked pedicel. Glumes coriaceous, prominently 7-nerved, toothed at the apex. In water.
67. Glyceria. Spikelets terete or flattish. Flowering glumes scarious at the usually blunt summit, prominently 5–7-nerved.
68. Puccinellia. Mainly as Glyceria, but the glumes obsoletely 5-nerved.
69. Festuca. Spikelets terete or flattish. Flowering glume acute, pointed or awned at the tip, few-nerved. Styles terminal.
70. Bromus. Glume rounded or keeled on the back, mostly awned below the 2-cleft tip, 5–9-nerved. Styles scarcely terminal.
Tribe X. HORDEÆ. Spikelets 1–several-flowered, sessile on opposite sides of a zigzag jointed channelled rhachis, forming a spike. Empty glumes sometimes abortive or wanting. Uppermost flower imperfect or abortive.
[*] Spikelets single at each joint of the solitary spike.
71. Lolium. Spikelets many-flowered, placed edgewise on the rhachis of the spike, with one empty glume.
72. Agropyrum. Spikelets 3–several-flowered, placed flatwise on the rhachis. Empty glumes 2, right and left.
73. Lepturus. Spikelets small, 1–2-flowered; empty glumes 1 or 2. Spike very slender.