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Key to Teucrium

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1 Leaves (at least the better-developed) deeply pinnatifid-lobed, the lobes extending > ½ way to the midvein; corolla white or pink, with pink or purple markings; flowers axillary to well-developed leaves.
..2 Corolla pink; annual to 1-3 dm tall
..2 Corolla white; annual or perennial 0.5-7.5 dm tall.
....3 Corolla 6-15 mm long; plant annual, 1.5-7.5 dm tall
....3 Corolla 14-22 mm long; plant perennial, 0.5-1.5 (-2.5) dm tall
1 Leaves entire or serrate; corolla lavender with dark purple markings; flowers in a terminal raceme, each subtended by a small bract clearly different than the main cauline leaves.
......4 Hairs of the calyx and inflorescence gland-tipped, 1.0-1.5 mm long; leaf undersurface densely pubescent beneath with long, straight or somewhat curly hairs
......4 Hairs of the calyx and inflorescence not gland-tipped, 0.5-0.8 mm long; leaf undersurfaces either with short, curved, loosely appressed hairs, or with tightly appressed, straight, silvery hairs.
........5 Midvein on lower surface of leaves with loose hairs, or if somewhat appressed, antrorse or retrorse; leaves grayish-green or gray beneath; [widespread in our area]
........5 Midvein on lower surface of leaves with closely appressed retrorse hairs towards the base of the leaf; leaves silvery beneath; [largely or entirely on the se. United States Coastal Plain]
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