Nectarios Extraflorales en Piriqueta y Turnera (Turneraceae)

the anatomical and morphological characters of the extrafloral nectaries were studied in 4 species of piriqueta , and in 16 which belong to six of the seven series of turnera (turneraceae) that present these glands. they were classified according to its form and degree of development and a new type of "pore" was described: foveolate. based on morpho-anatomical characters, a probable morphological sequence was proposed. this would locate the species with flattened efn and without "pores" in a lower position; after that, the species with flattened nectaries and foveolate "pores" are found; in an intermediate position the elevated extrafloral nectaries (efn) - sphericals or hemisphericals as well as cupuliforms -were found; finally, the cupuliform efn with crateriform or mesetiform "pore" are found. several species of diverse series presented variable characters, being located in an unlike position in the proposed morphological sequence; species with heterogeneous characters were also observed, being difficult to establish their location in the sequence.