Morphology and vascular anatomy of the flower in Dracaena surculosa Lindl. and Sansevieria aeth│opica Thunb. (Asparagaceae Juss.)

O. Fishchuk1, └. Odintsova2

1Lesya Ukrainka Eastern European National University
13, Voli Ave., Lutsk 43025, Ukraine
2Ivan Franko National University of Lviv
4, Hrushevskyi St., Lviv 79005, Ukraine

The floral morphology and vascular anatomy in Dracaena surculosa and Sansevieria aeth│opica have been studied. It was shown that the perianthium and androecium in the studied species have a lot of similar features. In the same time, there were obtained some differences in the inner ovary structure, vertical zonality of septal nectary, and the structure of the ventral complex of bundles. The median ovule is supplied by a pair of bundles in both species. Septal nectary in Sansevieria aeth│opica is 1,5 times longer than the locules, it is expanded in the ovary base and roof. Both types of septal nectary zonality that are described in studied species were previously revealed in Sansevieria species. Investigated features of the flower confirm the significant morphological resemblance between the genera Dracaena and Sansevieria.

Keywords: Dracaena surculosa, Sansevieria aeth│opica, flower morphology, vascular anatomy, gynoecium, septal nectarˇ

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