Fig. 15

15.1 A and B. Lks1.b (Awnless 1) to the left compared to Bowman. 15.2 A. Mutant Short crooked awn 1 (sca1.a) to the left compared to Bowman. B. Enlarged upper part of a spike of sca1.a. 15.3 Kap1.a (Hooded lemma 1) is a dominant mutation that causes the appearance of an extra flower of inverse polarity on the lemma. The trifurcate structure consists of a deformed floret at its center with two triangular leaf-like projections called lemma wings. The supernumerary spikelet often contains stamens with fertile pollen grains and occasionally bears a kernel within it. Bowman is to the left in A and top in B. 15.4 A. In mutant Subjacent hood 1(sbk1.a) the lemma is modified into a sac-like structure also including a short thin awn. B. Calcaroides-c mutants (Cal-c.15) bear a sac plus pronounced lemma wings. A normal Bowman spikelet to the right. C. Spike of cal-e.23 to the left compared to Bowman