found: GRIN taxonomy, via WWW, Feb. 9, 2006(Genus: Monotropa L. Family: Ericaceae, subfamily Monotropoideae, tribe Monotropeae. Also sometimes placed in: Monotropaceae. Synonym: Hypopitys)
found: The plants database, via WWW, Feb. 9, 2006(Monotropa L., Indianpipe. Family: Monotropaceae. Two species: Monotropa hypopithys L. -- pinesap; Monotropa uniflora L. -- Indianpipe)
found: A synonymized checklist of the vascular flora of the United States, Puerto Rico, and the Virgin Islands, via WWW, Feb. 9, 2006(Monotropa (Monotropaceae))
found: Names in current use for extant plant genera, via WWW, Feb. 9, 2006(Monotropa (Dicotyledones: Pyrolaceae))
found: Index nominum genericorum (plantarum), via WWW, Feb. 9, 2006(Monotropa. Phan.-Pyrolaceae. Synonyms: Hypopithis, Hypopythis)
found: Mabberley, D.J. The plant-book, c1997(Monotropa. Ericacaceae (Monotropaceae). Two species: M. hypopitys (yellow bird's-nest), M. uniflora (Indian pipe))
found: Beetle, A.A. Recommended plant names, 1970(Monotropa, Indianpipe)