Hieraciifolium: Answers to key questions in Budd's Flora and Flora of North America leading to this species. 

	biennials or perennials (short-lived); NOT [annuals]
	pubescence mostly or entirely of stellate hairs; NOT [pubescence mostly or entirely of malpighian hairs]
	sepals 4-7 (8) mm; NOT [sepals 1.8-3.2 mm]
	petals 3-10 (15) × 1.5-3 mm; NOT [petals (10) 13-30 (35) × 3-10 (15) mm]
	petal claws 3-8 mm; NOT [petal claws 1.5-3.5 mm]
	petals yellow; NOT [petals purple]
	inner (longer) filaments 2-7 (10) mm; NOT [inner (longer) filaments (6) 7-15 mm]
	stigmas entire; NOT [stigmas strongly 2-lobed]
	fruiting pedicels not one quarter as long as fruit; NOT [fruiting pedicels almost half as long as fruit]
	fruiting pedicels narrower than fruit; NOT [fruiting pedicels as wide as fruit]
	fruits appressed to rachises; NOT [fruits not appressed or subappressed to rachises]
	fruit valves usually glabrous inside, rarely sparsely pubescent; NOT [fruit valves densely pubescent inside]

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

	trichomes present; NOT [trichomes absent]
	trichomes sessile (malpighian or stellate); NOT [trichomes stalked (malpighian or stellate), or simple]
	at least 1 cauline leaf present; NOT [cauline leaves absent]
	cauline leaves entire to dentate, not lobed; NOT [cauline leaves deeply lobed, lyrate to tripinnate]
	cauline leaves NOT clasping, auriculate, or sagittate at base
	flower clusters without bracts or only the lowermost flower(s) with bracts; NOT [flower clusters with bracts throughout]
	flowers yellow
	pods usually at least 4 times as long as wide; NOT [pods usually not more than 3 times as long as wide]
	pods not compressed at right angles to the central partition; NOT [pods compressed at right angles to the central partition]
	pods scarcely beaked; NOT [pods with a long, distinct beak]

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

	herbs; NOT [shrubs or trees]
	plants terrestrial or semiaquatic; NOT [plants aquatic, leaves submerged or floating]
	plants not with colored milky juice
	plants with more than one normal leaf
	some or all leaves alternate; NOT [leaves opposite, whorled, or basal]
	leaves without stipules, or having glands; NOT [leaves with stipules]
	flowers with two floral rings
	calyx regular; NOT [calyx irregular, some sepals smaller than others]
	sepals 4
	corolla regular in shape; NOT [corolla irregular in shape]
	each petal distinct from the others
	petals 4
	stamens 6, four long and two short
	ovary superior; NOT [ovary inferior]
	carpels 1 or 2