gramineae don't Tribe II Festuceae Spikelets all alike in the same inflorescence. A. lemmas three nerved, nerves prominent, often hairy Inflorescence an everted open or spike-like panicle lemmas not pubescent on the nerves, awnless, glumes shorter than the lemmas; lateral nerves of the lemmas not marginal interneves glabrous lemmas membranaceous; spikelets compressed; lemmas acute or acuminate; spikelets 3 to many flowered Enagrostis AA. lemmas 5 to many nerved, the nerves sometimes obscure Spikelets with no empty lemmas below the fertile florets, nerves usually prominent. lemmas membranaceous Glumes present, lemmas longer then broad, keeled on the back, awnless; spikelets small Poa Tribe VIII Chloridaceae Plants with perfect florets A. Spikelets with more than 1 perfect floret Inflorescence everted Spikes more than 1 but few, Rachis not prolonged Ellusine AA. Spikelet with only 1 perfect floret, often with additional imperfect florets above or below. B. Spikelet without additional modified floret, the rachilla sometimes prolonged Rachilla articulate above the glumes, Spikes two to many, digitate, rachilla prolonged Cynodon BB. Spikelets with 1 or more modified florets above the perfect one. Spikelets with no sterile floret below the perfect one; second glume without a spike. Spikes digitate or nearly so Fertile lemma awned or awnless Chloris