Poaceae

Perianth segments 0–3, usually 2; flowers grouped into a characteristic spikelet (Fig. 48) Poaceae

Spikelets bisexual (rarely unisexual, and if so, the spikelets similar and in the same inflorescence)

Spikelets not as in Group 13

Inflorescence a solitary spike or raceme (Fig. 47)

Spikelets sunken in the rhachis and scarcely protruding beyond the contour of the rhachis until they open

Spikelets with a single floret

Spikelets with two florets; upper one bisexual; lower one male or reduced to a lemma