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 not sunken in the rhachis, although the bases alone may be slightly sunken
Glumes 2
Spikelets sessile or if in groups of 3 then fertile central spikelet sessile and lateral male spikelets shortly pedicellate, Spikelets mostly c. 1 cm long or more
Spikelets pedicellate to sub sessile; spikelets usually less than 1 cm long