Hyoscyamus: Answers to key questions in Budd's Flora leading to this genus. 

	plants herbaceous; NOT [plants shrubby, often spiny]
	leaves alternate; NOT [leaves in pairs]
	corolla 2-3 cm long or wide
	corolla bell-shaped or funnel-shaped; NOT [corolla rotate (wheal-shaped)]
	fruit a capsule; NOT [fruit a berry]
	capsule NOT prickly
	capsule top falling off when mature

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]