Grass Structure
Gramineae: (a) diagram of a spikelet with 3 florets, with the rachilla elongated; (b1) diagram of a spikelet with 1 floret; (b2) floret taken from the same spikelet; (b3) flower of same; (c1) spikelet disarticulating below the glumes; (c2) spikelet disarticulating above the glumes; (d1) lemma with a terminal awn; (d2) lemma with a dorsal awn; (d3) lemma with a bifid apex and dorsal awn; (d4) lemma with a bifid apex and awn arising from the base of the notch; (e) lemmas with ragged apices