found: Work cat: Recovery strategy for the drooping trillium (Trillium flexipes) in Canada, 2016.
found: Government of Canada Species at Risk Public Registry website, April 6, 2016:(Drooping Trillium; Scientific name - Trillium flexipes)
found: NatureServe website, April 6, 2016:(Trillium flexipes, Drooping Trillium; Other common names - Nodding Wakerobin; Synonym - Trillium gleasonii; Genus - Trillium; Family - Liliaceae; Order - Liliales; Class - Monocotyledoneae; Phylum - Anthophyta)
found: ITIS website, April 6, 2016:(Trillium flexipes; Common names - Nodding wakerobin; Synonyms - Trillium declinatum, Trillium gleasonii, Trillium erectum var. blandum, Trillium erectum var. declinatum; Genus - Trillium; Family - Melanthiaceae; Order - Liliales; Class - Magnoliopsida; Division - Tracheophyta)
found: PLANTS Database, April 6, 2016:(Trillium flexipes, nodding wakerobin; Genus - Trillium; Family - Liliaceae; Order - Liliales; Class - Liliopsida-Monocotyledons; Division - Magnoliophyta-Flowering plants)
found: Encyclopedia of Life, May 2, 2016(Trillium flexipes; common names: Bent wake-robin Drooping trillium, Nodding Trillium, nodding wakerobin, White Trillium)
found: GBIF, May 2, 2016(Trillium flexipes; accepted species; common names: Bent Trillium, Drooping Trillium, declined trillium, nodding wakerobin, drooping trillium; synonyms: Trillium declinatum, Trillium declinatum f. walpolei, Trillium flexipes f. flexipes, Trillium gleasonii)