[*][*] Spikelets with two or more perfect flowers; awns none.
47. Eleusine. Spikes digitate, dense.
48. Leptochloa. Spikes racemose, slender. Spikelets small, alternate.
[*][*][*] Spikelets diœcious; spikes small, very dissimilar.
49. Buchloe. Pistillate spikes capitate, sessile, the spikelets 1-flowered; staminate spikes (2 or 3) on a peduncle, the spikelets 2–3-flowered.
Tribe IX. FESTUCEÆ. Spikelets few–many-flowered, panicled, the uppermost flowers often imperfect or abortive. Glumes pointless or the flowering ones tipped with a straight awn or bristle.
[*] Flowering glume 1–3 nerved, 2–3-toothed. Rhachis short-bearded or glabrous.
50. Triodia. Rhachis of the spikelet bearded. Nerves of the flowering glume 3, villous, at least the middle one more or less excurrent.
51. Diplachne. Rhachis glabrous. Glume 1–3-nerved, with 2 small teeth, and a short awn in the cleft.
[*][*] Glume 3-nerved, entire or 2-toothed and mucronate between the teeth. Rhachis and flowers long-villous. Tall reeds with ample panicles.