FIGURE 3 in A multicarpellate fruit from Late Cretaceous sediments of South Bohemia, Czech Republic
FIGURE 3. Schematic line drawings of the gynoecium of Covidifructus multicarpellatus. (A) Longitudinal median section through the gynoecium showing its complex internal morphology with a remaining floral apex and an empty space (asterisk) in the centre of the ovary; arrowheads indicate stigma positi...
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Zusammenfassung: | FIGURE 3. Schematic line drawings of the gynoecium of Covidifructus multicarpellatus. (A) Longitudinal median section through the gynoecium showing its complex internal morphology with a remaining floral apex and an empty space (asterisk) in the centre of the ovary; arrowheads indicate stigma positions; grey shaded areas indicate potential stigmatic secretion forming an extra-gynoecial compitum across neighbouring stigmas; pollen grains and hypothetical pathways of pollen tubes are given in orange; dashed orange line indicates hypothetical pathway of pollen tube reaching a stigma via growth through the extra-gynoecial compitum; dashed black line indicates area of postgenital carpel union in the centre of the ovary (symplicate region); arrows indicate area of irregular ovary closure shown in (B); placentation is axile with the seeds (green) attached in the distalmost part of the ovary. (B) Line drawing showing zone ovary closure (see also Figure 1C, F) as seen from above, radial lines correspond to ventral slits of individual carpels; carpel flanks meet in an irregular pattern in the centre of the gynoecium; the area of closure is flattened (compressed; indicated by dashed ellipse), and the 10 carpels are roughly arranged in a double row facing each other (dashed line in centre of figure) rather than in a smooth circle. |
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DOI: | 10.5281/zenodo.12656566 |