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An interactive guide to the native orchids of Wisconsin. Descriptions and images. Jeffrey R. Hapeman. University of Wisconsin, United States.
UNITED STATES WISCONSIN AMERORCHIS APLECTRUM ARETHUSA CALOPOGON CALYPSO COELOGLOSSUM CORALLORHIZA CYPRIPEDIUM EPIPACTIS PLATANTHERA POGONIA SPIRANTHES WILD NORTH AMERICA