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

	stems hairy (at least near the base); NOT [stems hairless, with a pale, bluish-white coating]
	leaves (at least some) > 4 mm wide; NOT [leaves <= 4 mm wide]
	leaves all pinnatifid to pinnate; NOT [leaves all or mostly entire, very narrow]
	upper stem leaves with 2-4 lanceolate to linear lateral lobes on each side, tipped with a much larger narrowly triangular lobe; NOT [upper stem leaves with (3) 4-6 (8)  linear to hair-like lobes on each side, terminal lobe not much larger or much different in shape than lateral ones]
	pods spreading or ascending; NOT [pods closely appressed to the stem]
	pedicels 1.25 cm long; NOT [pedicels more or less 0.5 cm long]
	pedicels slender, much narrower than the pods; NOT [pedicels thick, more or less equal in width to the pods]
	pods 2.5-4 cm long; NOT [pods 1-2 cm long],  NOT [pods 5-10 cm long]
	pods linear, cylindrical; NOT [pods conical, awl or lance shaped]
	pods beakless; NOT [pods beaked]
	pods prominently veined; NOT [pods obscurely veined]

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

	plants of dry habitats; NOT [plants of wet habitats]
	hairs, when present, simple ; NOT [hairs attached at the middle, sessile, appressed, malpighian or stellate]
	plants without stalked glands; NOT [plants with many-celled, stalked glands]
	prominent cauline leaves present
	cauline leaves singly pinnately divided or lobed, or with outward-pointed teeth; NOT [cauline leaves entire], NOT [cauline leaves bi- to tri-pinnately divided into many leaflets]
	cauline leaves long attenuate at base; NOT [cauline leaves more or less clasping, auriculate or sagittate at base]
	raceme without bracts; NOT [raceme with small leafy bracts at the base of most (or at least lower-most) flowers]
	petals present; NOT [petals absent]
	petals yellow
	petals with veins of the same color intensity as the rest of the blade; NOT [petals with dark, purple or brown veins]
	stigmas 2-lobed; NOT [stigmas undivided]
	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]
	pods splitting open lengthwise; NOT [pods breaking into segments]
	seeds in 1 row; NOT [seeds in 2 rows]
	seeds plump; NOT [seeds flat]

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