T REPRO N DU The International Journal of Plant Reproductive Biology 11(1) Jan., 2019, pp.9-14 LA C P T I F V O E B Y T I DOI 10.14787/ijprb.2019 11.1. O E I L O C G O S I S T E S H Functional floral morphology of two medicinal Mikania (Asteraceae) T species and their floral visitors 1* Marinês Eiterer , Adriano Valentin-Silva1*, Nelson S. Bittencourt Junior2 and Milene F. Vieira1 1Federal University of Viçosa, Department of Plant Biology, s/n P.H. Rolfs Ave., 36.570-900, Viçosa, MG, Brazil. 2UNESP – São Paulo State University, Institute of Biosciences, Letters and Exact Sciences, 2265 Cristóvão Colombo St., 15.054-000, São José do Rio Preto, SP, Brazil. *e-mail :
[email protected] Received : 11. 09. 2018; Accepted and published online: 15.11.2018 ABSTRACT Mikania species, including the ones addressed in this study (M. glomerata and M. hirsutissima), are widely used as medicinal plants. In order to subsidize projects for the management and conservation of those two species, studies on their flower functionality, which involves several events that culminate in pollination, are highly necessary. We aimed to analyze the functional floral morphology of both species, including secondary pollen presentation (SPP), stigmatic receptivity and pollen grain viability. Additionally, we identified the species floral visitors and the potential pollinators among them. We studied natural populations from a seasonal semi-deciduous forest (Viçosa municipality, Minas Gerais state, southeastern Brazil) in 2003 and 2004. Flowers of both species are nectariferous, odoriferous, and open in the morning.