|Text Source:||Woodliffe, P.A. 1988. Status Report on the Nodding Pogonia, Triphora trianthophora. COSEWIC. 42 pp.|
|Ontario Map Source:|| Argus, G.W., K.M. Pryer, D.J. White, and C.J. Keddy. 1982-87. Atlas of the Rare Vascular Plants of Ontario. 4 parts. National Museum of Natural Sciences, Ottawa, Ontario. Looseleaf.
White, D.J. 1998. Update Status Report for Nodding Pogonia (Triphora trianthophora). COSEWIC. 4 pp.
See text source also.
|North American Map Source:||See Argus et al. under Ontario Map sources.|
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