Dulcamara: Answers to key questions in Budd's Flora leading to this species. 

	perennial; NOT [annual]
	climbing vine
	flowers deep purple; NOT [flowers white or yellow]

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

	plants herbaceous; NOT [plants shrubby, often spiny]
	corolla smaller; NOT [corolla 2-3 cm long or wide]
	corolla rotate; NOT [corolla bell-shaped or funnel-shaped]
	stamens coherent, forming a tube around the style; NOT [stamens free]

Solanaceae: 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 without milky juice
	NOT [twining plants with large, funnel-form corolla]
	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
	petals wholly or partly united forming a tube or bell
	corolla regular; NOT [corolla irregular]
	stamens 4 or 5; NOT [stamens 8 or 10]
	stamens alternating with corolla lobes, or twice their number; NOT [stamens directly in front of corolla lobes]
	style terminal; NOT [style from center of lobes of ovary]
	ovary superior; NOT [ovary inferior]
	ovary 2-celled; NOT [ovary 1-celled], NOT [ovary 3-celled]
	ovary with seeds borne on axis in center of cell; NOT [ovary with seeds born on wall of cell]
	fruit a berry or a capsule; NOT [fruit with 4 nutlets]