Fig. 2. as1 and as2 suppress the stm mutant phenotype. Double mutants as1 stm-1 (A) and as2 stm-1 (B) have vegetative shoots and leaves similar to the single as1 and as2 mutants, respectively, but additional lateral shoots are formed in the place of flowers. Double mutants between the weak stm-2 allele with as1 (C) and as2 (D) produce more flowers. Scanning electron micrographs of flowers from as1 stm-2 (E) and as2 stm-2 (F) reveal that terminal flowers are frequently fused along the pedicel. Floral organs, particularly reproductive organs, are reduced in number or absent. Scale bar, 2 mm.