Scandens: Answers to key questions in Budd's Flora, Vascular Flora of Alberta: An Illustrated Guide, Flora of North America, and University of Saskatchewan Virtual Herbarium of  Plants at Risk in Saskatchewan leading to this species. 

	plants perennial or annual; NOT [plants annual]
	stems nearly terete; NOT [stems sharply angled]
	ocreae bases glabrous or scabrid; NOT [ocreae bases fringed with reflexed hairs and slender bristles]
	fruiting tepals to 15 mm long; NOT [fruiting tepals to 5 mm long]
	fruiting tepals with (0.7) 1.5-2.1 mm wide wings extending down the stalk, their edges wavy or rippled (rarely flat) and variously lobed or torn (rarely smooth); NOT [fruiting tepals wingless or rarely with 0.4-0.9 mm wide wings]
	fruiting tepals glabrous; NOT [fruiting tepals glabrous or with blunt, hyaline hairs]
	achenes smooth, shiny; NOT [achenes minutely granular-tuberculate, dull]

Fallopia: Answers to key questions in Budd's Flora and Vascular Flora of Alberta: An Illustrated Guide leading to this genus. 

	stems twining or sprawling; NOT [stems mostly erect, ascending, not twining]
	leaves mainly on the stem; NOT [leaves mostly basal]
	leaves broad; NOT [leaves linear, lanceolate or oblong], NOT [leaves round to kidney-shaped]
	leaves hastate at base or heart-shaped
	leaves with stipules that encircle/sheath the stem (ocreae); NOT [leaves without stipules sheathing the stem]
	ocreae never 2-lobed near the tip; NOT [ocreae 2-lobed near the tip]
	ocreae papery and thin but not transparent; NOT [ocreae often nearly transparent]
	ocreae tan to brownish; NOT [ocreae silvery]
	flowers clusters without a whorl of bracts; NOT [flower clusters with whorl of leafy to scale-like bracts at the base]
	flowers perfect
	tepals 5
	outer tepals winged or keeled; NOT [outer tepals neither winged nor keeled]
	inner tepals rarely enlarged in fruit; NOT [inner tepals usually enlarged in fruit]
	stamens 6-8
	achenes completely enclosed  by tepals or barely extending beyond them; NOT [achenes clearly extending beyond the tepals]
	achenes more or less unwinged; NOT [achenes lens-shaped, broadly winged]

Polygonaceae: Answers to key questions in Budd's Flora  leading to this family. 

	herbs; NOT [shrubs or trees]
	land plants; NOT [water plants]
	plants not parasitic on trees
	plants with more than one pair of leaves; NOT [plants with a single pair of large reniform leaves]
	leaves alternate; NOT [leaves opposite]
	stipules present
	stipules forming a sheath above nodes
	flowers perfect