Floral biology and histochemical analysis of Vanilla edwallii Hoehne (Orchidaceae: Vanilloideae): an orchid pollinated by Epicharis (Apidae: Centridini) - Pansarin, Emerson Ricardo; Aguiar, João Marcelo Robazzi Bignelli Valente; Pansarin, Ludmila Mickeliunas (Plant Species Biology, 2014)