59. Diarrhena. Glumes 3-nerved, coriaceous, the flowering one abruptly cuspidate. Panicle loosely few-flowered.
[*][*][*][*][*][*] Flowering glume 5-nerved or more (sometimes obscurely so). Only the terminal flower abortive, or none.
[+] Glumes more or less strongly compressed and carinate (ventricose in n. 63).
60. Uniola. Spikelets broad, flat and 2-edged, in usually loose panicles. Glumes coriaceous, acute, the 3–6 lower ones empty.
61. Distichlis. Diœcious. Spikelets large, flattened, in a close panicle. Empty glumes 2, acute.
62. Dactylis. Panicle contracted in 1-sided clusters. Glumes herbaceous, awn-pointed, rough-ciliate on the keel.
63. Briza. Spikelets heart-shaped, in lax panicles. Glumes roundish, ventricose, scarious-margined.
64. Poa. Spikelets small, flattened, ovate to lance-ovate, in a loose panicle. Flowering glumes membranous and scarious-margined, pointless, usually webby or pubescent toward the base.
65. Graphephorum. Spikelets compressed, in a loose panicle, the hairy jointed rhachis produced into a hairy pedicel. Glumes thin-membranous, faintly nerved, entire.
[+][+] Glumes convex on the back, not carinate (or somewhat so in n. 70).