FERRUCCI Maria silvia
The floral nectaries of Cardiospermum grandiflorum and Urvillea chacoensis (Sapindaceae): Morpho-anatomy and ontogeny
SOLÍS S.M. ; FERRUCCI M.S.
ANNALES BOTANICI FENNICI
FINNISH ZOOLOGICAL BOTANICAL PUBLISHING BOARD
Lugar: Helsinki; Año: 2009 vol. 46 p. 485 - 495
The morphology, anatomy and ontogeny the floral nectary of two species of Sapindaceae-Paullinieae, Cardiospermum grandiflorum and Urvillea chacoensis, were studied with light and scanning electron microscopy. Both species are monoecious with oblique monosymmetric flowers. The floral nectaries are located at the base of the androgynophore. Vascular tissue supplying the nectaries consists of phloem. Cardiospermum grandiflorum has a posterior nectary with two lobes without any specially differentiated tissue, and with nectarostomata. Urvillea chacoensis has a nectary with 4 lobes; 2 posterior ones with distinctive nectariferous tissue with nectarostomata on the abaxial side, and 2 minor anteriores ones that are histologically similar but without nectarostomata. The nectaries in both species have a common base with the petals. Since the nectaries are macroscopically differentiated they are considered as structural nectaries.