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Pollen tube germination (LM). (A) Longitudinal section of the gynostemium of E. aphyllum with massively germinated pollen grains; pollen tubes are visible in the stylar canal and the ovary. (B,C) Details of stigma cells and stylar canal. (A,B) Fourth and (C) 3rd day after hand-pollination. Abbreviations: an – anther, ov – ovary, pg – pollen grains, pt – pollen tubes, sc – stylar canal, st – stigma cells.
