Androsaemifolium: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 

	leaves drooping or spreading; NOT [leaves ascending or spreading]
	flower clusters both terminal and axillary; NOT [flower clusters at the ends of leafy branches only]
	flower clusters flowering simultaneously; NOT [central clusters opening much earlier than the others]
	flowers nodding; NOT [flowers upright or spreading]
	petals three times as long as sepals; NOT [petals twice as long, or less than twice as long, as sepals]
	corolla-lobes recurved; NOT [corolla lobes spreading or ascending]
	corolla pinkish; NOT [corolla greenish to whitish]
	seeds 2.5-4 mm long; NOT [seeds 4-6 mm long]

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

	herbs; NOT [shrubs or trees]
	plants green or with some chlorophyll; NOT [plants parasitic or saprophytic, without chlorophyll]
	plants WITH milky juice
	flowers not in heads or spikes; NOT [flowers in long or short spikes]; NOT [flowers in heads or in form resembling a head]
	flowers with two floral rings, but with the petals wholly or partly united forming a tube or bell]
	corolla regular; NOT [corolla irregular]
	stamens distinct; NOT [stamens united]
	pollen grains separate; NOT [pollen grains united into a mass]
	ovary superior; NOT [ovary inferior]
	styles united; NOT [styles distinct]