Figure 2.

Morphological diversity of awns in barley cultivars and mutants. (A), 6-rowed spike with long awns. (B), awnless 2-rowed spike. (C), 6-rowed spike with stigma-like short, crooked awns. (D), Hooded spike. (E), Hooded spike with long awns. (F,G), 2-rowed and 6-rowed spikes with long awns. (H), 6-rowed spike having long awns on the central spikelet and awnless lateral spikelets. (I), Front- and side-views of a triple awn. (J), 6-rowed spikelets with elevated hoods. (K), spikelet with leafy awn. (L), awnless spikelet. (M), 6-rowed spikelets with stigma-like short, crooked awns. (N), hooded floret with an extra floret. (O), subjacent hooded floret. st, stigma-like short, crooked awn; h, hooded awn; ef, extra floret; eh, elevated hooded; leafy, leafy awn; le, lemma; ep, extra palea, el, extra lemma.