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 branched (Fig. 47k)

Silky hairs longer than the lemmas, attached to the pedicel or the rhachilla or the backs of the lemmas around the bisexual or female florets

Spikelets with 1 bisexual floret

Inflorescence rhachis thickened. Spikelets closely appressed and sometimes embedded in the rhachis (Fig. 47 h)

Inflorescence rhachis not markedly thickened, spikelets not embedded in the rhachis