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Encyclia tampensis (Lindl.) Small (Orchidaceae), the butterfly orchid, is a commercially exploited, epiphytic orchid native to Florida. Similarly, Prosthechea cochleata (L.) W.E. Higgins (Orchidaceae), the clamshell orchid, is an endangered orchid that is epiphytic and native to Florida. We conducted this study in southern Florida at the Florida Panther National Wildlife Refuge to gain more information about the pollination biology of E. tampensis and P. cochleata (var. triandra). Experiments using pollinator exclusion bags revealed that E. tampensis is not capable of spontaneous self-pollination, and requires a pollen vector for seed capsule development; however, P. cochleata appears to be readily self-pollinating. Using active and passive sampling, we determined that E. tampensis potentially can be pollinated by a variety of flower-visiting insects, including Hymenoptera, Diptera, and Coleoptera. Insects from all 3 orders were observed on and collected from the E. tampensis flowers. However, only insects from 1 order (Hymenoptera) were actively collected from P. cochleata. Our data are useful for conservation efforts for E. tampensis and P. cochleata, because knowledge about potential pollinators and self-pollination capability can lead to future studies and information about optimal habitats for outplanting and reintroduction. The orchids face decline due to habitat loss, pests, and poaching, so conservation is an important key to re-establishment of these species.

the florida entomologist

Aspects of the Pollination Biology of Encyclia tampensis, the Commercially Exploited Butterfly Orchid, and Prosthechea cochleata, the Endangered Clamshell Orchid, in South Florida