Figure 2.

Ontogeny of mutant flowers. a, An inflorescence of pfm; bar = 1 mm. b to d, Dissection of a pfm mutant inflorescence; bar = 1 mm. e, An inflorescence of pfo-2; bar = 1 mm. f to h, Dissection of pfo-2 mutant inflorescence; bar = 1 mm. i to r, SEM showing the floral ontogeny of the pfm mutant; bar = 50 μm. i, The I2 (I₂) initiates from the I1 (I₁). j, Primary floral meristems (FM) initiate progressively from the I2 meristem. k to m, Early stages of pfm primary floral development. n, The floral meristem of pfm initiates four to five anlagen or primordia (cross) between the sepals and the carpel. Trichomes (arrowhead) appear at the boundaries of the flattened primordia. o, The anlagen contract into ball-like structures. p, Another round of floral-like meristems (cross) form, at the periphery of which another whorl of sepals (arrowhead) initiates. q and r, Repeated pattern of floral-like meristems. Broken rings indicate the successive floral-like meristems.