Abstract
Platanthera peromoena is pollinated by Hemaris thysbe. The viscidia are positioned to attach to its compound eyes. Both Platanthera psycodes and P. grandiflora are partially self-incompatible. Autogamy is absent. Platanthera lacera is pollinator limited. Low levels of autogamy or agamospermy are present. Platanthera grandiflora is pollinated by medium to large-sized lepidoptera with the viscidia attaching to the compound eyes. Platanthera psycodes and P. lacera are pollinated by smaller lepidoptera with the viscidia attaching to the proboscis. Platanthera praeclara and P. leucophaea are self-compatible but not autogamous. Both are pollinated by sphingid moths. Differences in the divergence of the rostellar lobes and caudicle movements provide mechanical barriers that minimize interspecific pollen transfer.
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Argue, C.L. (2012). Lacera 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_11
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