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

	plants not with a bluish tinge
	leaves not divided into numerous segments
	lower leaves simple and cordate at base, the upper leaves commonly trifoliate
	lower leaves and upper leaflets serrate
	margins of basal leaves not spinulose
	plants lacking axillary bulblets; NOT [plants with axillary bulblets largely replacing flowers]
	flowers not in dense globose heads
	the central flower in the umbellets sessile; NOT [the central flower in the umbellets pedicellate]
	margin of bracts not spinescent
	flowers yellow; NOT [flowers white]
	fruit less than 1 cm long
	fruit not linear
	fruit flattened but wingless; NOT [fruit strongly flattened, broadly winged]
	fruit glabrous; NOT [fruit usually pubescent], NOT [fruit covered with short hooked spines]

Umbelliferae: 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
	stems hollow; NOT [stems fleshy]
	plants with more than one normal leaf
	some or all leaves alternate; NOT [leaves opposite, whorled, or basal]
	stipules absent but sheathing petioles present
	flowers in umbels
	parts of flowers mostly in fives; NOT [parts of flowers in twos or fours]
	flowers with two floral rings
	calyx regular; NOT [calyx irregular, some sepals smaller than others]
	each petal distinct from the others
	stamens 10 or fewer; NOT [stamens usually more than 10]
	styles 2; NOT [styles 5]
	ovary inferior; NOT [ovary superior]