Fig. 4. Phenotypes of wild type (A) and inco-1 mutant flowers (B-F). The bottom regions of flowers in B-C are magnified on the right to show prophylls (indicated by asterisks) and fusion of petals and sepals (arrows in B,C). inco buds with large prophylls are depicted in D. Globular glands (circled) are present at the tip of prophylls and bracts, but not in sepals. The diagrams on the right schematically show the morphological changes. The positions of sepals in the wild type are designated by d (dorsal, i.e. adaxial), l (lateral) and v (ventral, i.e. abaxial). Size alteration and displacement of lateral inco sepals is highlighted in blue. (E,F) Vascular skeletons show that secondary veins develop parallel to (instead of branching from) the midvein in inco prophylls and sepals (parallel venation), and the glandular structure (circled) at the tip of prophylls. b, bract; s, sepal. Scale bars: 5 mm in A-D; 0.5 mm in E,F.