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

	plants perennial; NOT annual
	stem glabrous; NOT pubescent
	flowers in a terminal, spike-like inflorescence; NOT in axillary clusters, NOT forming an obvious terminal inflorescence
	inflorescence a more or less elongated raceme; NOT a more or less globose head
	inflorescence a raceme of oppositely placed clusters of flowers; NOT a raceme of oppositely placed flowers
	spikes symmetrical; NOT strongly one-side
	bracts much shorter than and differing from the stem leaves; bracts NOT grading into the stem leaves
	calyx longer on upper than lower side, somewhat oblique at throat; calyx NOT [regular, clearly 5-lobed]
	calyx indistinctly or not at all 2-lipped, one lobe may be larger than the others; NOT [calyx distinctly 2-lipped, the upper lip 3-toothed, the lower one 2-lobed]
	calyx NOT [distinctly 5-toothed, the upper tooth almost as wide as the lower 4 together]
	calyx lacking a helmet-shaped projection on the upper side
	calyx 15-nerved or more; NOT 5-10 nerved
	corolla 2-lipped; NOT [more or less regular, 4-lobed]
	corolla blue; NOT [white with purple dots]
	stamens didynamous; NOT all of equal length
	upper pair of stamens longer than the lower pair; NOT shorter than the lower pair
	stamens 4; NOT 2