Biologia da polinização de Sparattosperma leucanthum (Vell.) K. Schum. (Bignoniaceae)

Abstract

The objectives of this study went to describe the reproductive phenology and the floral biology, as well as to analyze the interaction and the predominant floral visitors' behavior in Sparattosperma leucanthum (Vell.) K. Schum - a pioneering species, in which settles down mainly in areas degraded by processes anthropogenic. For that, were appraised the reproductive phenology, the floral characteristics and the floral visitors' observations along the day in an area from 2 to 3 m2 of flowery branches of S. leucanthum. The period of development of the floral buttons and the flowering happened predominantly during the rainy station, already the fruits grew and the liberation of the seeds happened mainly in periods of low rainfall, and for that last phenology states there was coincidence with period of speed of the wind increased. The floral characteristics, such as format of the type throat, rest platform, guide-of-nectar, present odor, presents mainly of nectar among other, are adapted the bees of big corporal load as the carpenter bees. Were dear an average of 384,9±65,1 visitors for the floral branches sampled along the day. The five predominant species were Apis mellifera L. 1758, Trigona spinipes (Fabr. 1793), Bombus sp1, Hylocharis chrysura Sandy 1812 and Halictidae sp1, and of those species just Bombus sp1 seemingly pollinated the flowers indeed.