Anatomy of V. minor wild-type (A–C) and flore pleno (D–K) flowers. (A) Petals and stamens; (B) growth positions of stamens and the collar-bearing style in situ; (C) gynoecium; (D) mis-shaped broadend sepal; (E–G) different organs from a single flower with intermediate mutant phenotype; in (G), stamens with purple (petaloid) areas are shown; (H–K) organs from flower with severe mutant phenotype; (I) upper part: petals of the second whorl; lower part: petals from the third whorl; right bottom: organs from inner whorls; (J) organs from inner whorls as shown at right bottom of (I); (K) elongated ovary of a mutant flower. Scale bars = 1 mm. Abbreviations: p, petal; st, stamen; c, collar of the style; ca, carpel; bs, broadened sepal; pa, purple (petal-like) areas on stamens of mutant plants; op, second whorl (outer) petals; ip, extra (inner) petals; il, leaf-like organ inside the third whorl; eo, elongated ovary.