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

	plants coarse; NOT [plants delicate]
	stems either submersed or floating; NOT [stems creeping on bottom in shallow water]
	stem at least 0.5 mm thick; NOT [stem less than 0.5 mm thick]
	leaves readily seen; NOT [leaves obscure]
	leaves finely dissected; NOT [leaves thread-like, simple]
	leaves terete, capillary; NOT [leaves flattened]
	leaves and bladders born on the same branch; NOT [leaves and bladders born on separate branches]
	bladders readily seen;  NOT [bladders minute]
	bladders abundant; NOT [bladders few]
	flowers 15-25 mm long; NOT [flowers 3-10 mm long]

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

	plants floating on or submersed in water; NOT [land plants]
	leaves not in a basal rosette
	leaves usually dissected; NOT [leaves entire]
	leaves bearing small bladders
	flowers several in a raceme above water; NOT [flowers solitary]
	calyx with 2 sepals; NOT [calyx with 5 sepals]
	flowers yellow; NOT [flowers bluish violet]

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

	herbs; NOT [shrubs or trees]
	plants green or with some chlorophyll
	plants aquatic
	flowers NOT in heads or spikes
	corolla irregular; NOT [corolla regular]
	corolla spurred
	ovary superior; NOT [ovary inferior]