Abstract
Platanthera obtusata is a predominantly outcrossing species pollinated by female mosquitoes of the genus Aedes. Geometrid and pyralid moths play a secondary role. Forced lateral entrance of the nectar spur results in attachment of the viscidia to the compound eyes. The viscidia in P. orbiculata and P. macrophylla are positioned to contact the compound eyes of visiting moths. Floral morphology implies that moths of different size pollinate the two species. Platanthera hookeri may be pollinated by nocturnal settling moths or skippers. A forced lateral approach results in pollinaria attachment to the compound eyes.
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Argue, C.L. (2012). Platanthera Group. In: The Pollination Biology of North American Orchids: Volume 1. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-0592-4_10
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