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Aiming to estimate the rate of exploitation of the floral resources of Sparattosperma leucanthum (Vell.) K. Schum. as well as the interaction with their floral visitors in the pollination, the number of visits by flower was sampled, according to the type of visitation, the collected resource and the visitor's behavior during the forage for flowers. The floral visitors were grouped into seven guilds, organized in decreasing order of benefit to the S. leucanthum flower's pollination: effective pollinator, occasional pollinator, endogamic pollinator, generalist visitor, thievery visitor, thievery-pillager ant and pillager visitor. The total of 48.2 +/- 8.84 visits were recorded by flower. Nearly 50% of the visits resulted in nectar thief or pillage, which posed some problems to the reproduction of S. leucanthum, such as the drop in the attractiveness to pollinators and the harm to the flower's reproductive tissues. Trigona spinipes (Fabr.) (Hymenoptera: Apidae) was considered the most harmful species owing to the high frequency of pillage and forage. Bombus sp1, however, was probably the species that pollinated S. lecanthum flowers the most, making use of the crossed pollination.

Utilização dos recursos florais pelos visitantes em Sparattosperma leucanthum (Vell.) K. Schum. (Bignoniaceae)