Labradoricum: Answers to key questions in Flora of Alberta leading to this species.

	stem weak, matted or ascending; NOT [stem stiff, erect]
	stem mostly glabrous; NOT [stem scabrous]
	leaves in whorls of 4; NOT [leaves in whorls of 6-8]
	leaves often deflexed; NOT [leaves spreading]
	leaves 1-nerved; NOT [leaves 3-nerved]
	leaf midrib usually glabrous; NOT [leaf midrib often scabrous]
	corolla 4-lobed; NOT [corolla 3-lobed]
	ovary glabrous; NOT [ovary pubescent]

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

	stems square
	leaves whorled; NOT [leaves opposite]
	inflorescence of open cymes; NOT [inflorescence a head, subtended by bracts]
	corolla rotate; NOT [corolla slender-funnelform]

Rubiaceae: 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, with chlorophyll]
	plants without milky juice; NOT [plants often with milky juice]
	not climbing plants; NOT [climbing plants with tendrils]
	leaves opposite; NOT [leaves basal or alternate]
	leaves with stipules, appearing whorled; NOT [leaves without stipules]
	flowers NOT in heads or spikes; NOT [flowers in long or short spikes], NOT [flowers in heads or in form resembling a head]