FIGURES 13–24 in The floral organogenesis of Eurycorymbus cavaleriei (Sapindaceae) and its systematic implications

FIGURES 13–24. Floral development of Eurycorymbus cavaleriei. Fig. 13. Sequential initiation of a second adaxial petal primordium. The other one is hidden between sepals 1–3. Fig. 14. A young flower showing sepals, petals, stamens and carpel primordia (see stars). Fig. 15. Almost simultaneous initiation of the five petals and eight stamen primordia. There is an overlap between the initiation of the two petals next to sepal five and the last two stamens (arrows). Figs. 16 & 17. Slightly older stages, stamen primordia overtake the two delayed petal primordia (arrows) in size. Fig. 18. Differentiation of central carpellary area. Fig. 19. Carpel primordia initiate on the floral apex (see stars). Figs. 20 & 21. Successive stages of stamen diferentiation and carpel growth. Carpels expand progressively around a central meristem and develop a trilete apical slit. Two petals remain smaller for a long time (see arrows). Note the difference in size of the different petals. Figs. 22. Older stages of stamen diferentiation and carpel growth, showing the hairs starting to appear on the ovary and two smaller petals (see arrows). Fig. 23. Preanthesis staminate flower, showing parts of long folded filaments (see arrows) and disk; the degenerated ovary remains hidden. Fig. 24. In pistillate flowers, the ovary bulges out and the stamen development is arrested. Abbreviations in the images, C, carpel; F, floral primodia; N, disk; O, ovary; P, petal; S, stamen; and Se, sepal. Scale bars Figs. 13 & 15–21=50 μm, Figs. 14 & 22=100 μm, Figs. 23 & 24=200 μm.