XVI International Botanical Congess

The endemic epiphytic orchid, Catasetum viridiflavum occurs in a fragmented forest landscape in central Panama. I compared abundance and movement of the pollinator, Eulaema cingulata in fragments and continuous forest and the effects on male (pollinia removal) and female (fruit set) reproductive success. Eulaema were not fragment residents, but crossed intervening matrix. Bee abundance did not differ between forest types. Pollinia removal was not significantly different between forest types, but there were highly significant site and plant effects. Additionally, flower number per inflorescence significantly predicted pollinia removal. Fruit set was low for 1996-1998, but differed among years. Differential effects of male and female reproductive success complicates the conservation of sex switching species threatened by habitat fragmentation.