1	Calyx indistinctly 2-lipped; anterior teeth not spreading; corolla tube not dilated, with or without distinct hairy annulus inside, if hairy annulus present then horizontal; upper lip of corolla oblong, base inconspicuously constricted; lower lip of corolla limb nearly straight; middle lobe much larger than lateral lobes, apex conspicuously emarginate, margin membranous; stamens nearly straight; leaves 3-lobed.		(2)
+	Calyx distinctly 2-lipped; anterior teeth strongly spreading; corolla tube distinctly oblique hairy annulate inside, conspicuously dilated above hairy annulus; upper lip of corolla obovate, base constricted; lower lip of corolla limb horizontally spreading, its 3 lobes subequal, oblong-ovate, margin revolute; anterior stamens projected, reflexed; leaves 5-7-lobed.		(7)
2 (1)	Corolla less than 1 cm; without hairy annulus inside, puberulent		1 Leonurus chaituroides
+	Corolla more than 1 cm, distinctly ± horizontally scaly annulate inside.		(3)
3 (2)	Leaves 3-lobed, lobes pinnately divided.		(4)
+	Leaves many lobed, lobes incised or coarsely serrate-dentate.		(5)
4 (3)	Lobules of leaves more than 3 mm wide; floral leaves entire or rarely few dentate; corolla 1-1.2 cm; lower lip ca. as long as upper lip; calyx appressed puberulent		2 Leonurus japonicus
+	Lobules of leaves 1-3 mm wide, linear; floral leaves conspicuously 3-partite, lobules linear; corolla ca. 1.8 cm; lower lip ca. 3/4 as long as upper lip; calyx densely pilose especially at middle		3 Leonurus sibiricus
5 (3)	Calyx teeth 5-10 mm; corolla 2.5-2.8 cm, reddish or reddish purple; leaves not corrugate, herbaceous		6 Leonurus macranthus
+	Calyx teeth 3-5 mm; corolla 1.5-2.1 cm, white, somewhat purple lineate; leaves corrugate, rigid.		(6)
6 (5)	Plants densely villous		4 Leonurus villosissimus
+	Plants hirsute or strigose-hirtellous		5 Leonurus pseudomacranthus
7 (1)	Inflorescences densely lanate-villous; bracteoles flaccid		12 Leonurus pseudopanzerioides
+	Inflorescences not lanate-villous; bracteoles rigid.		(8)
8 (7)	Bracteoles and calyxes appressed pubescent, setose		8 Leonurus wutaishanicus
+	Bracteoles and calyxes appressed pubescent or appressed pubescent, white villous.		(9)
9 (8)	Leaves 7-palmatilobed to 1/3 of their radius; lobes irregularly coarse dentate		7 Leonurus urticifolius
+	Leaves distinctly 5-palmatipartite from 2/3 to nearly entire radius; lobes pinnatilobulate, lobules linear to broadly lanceolate.		(10)
10 (9)	Leaves numerous, lower stem leaves not early deciduous, lobes broadly cuneate, lobules broadly lanceolate; anterior teeth of calyx dilated in flower		10 Leonurus turkestanicus
+	Leaves few, lower stem leaves early deciduous, lobes narrowly cuneate to rhombic, lobules lanceolate to linear-lanceolate; anterior calyx teeth inconspicuously dilated in flower.		(11)
11 (10)	Basal part of stems, nodes, rachises of inflorescences, and calyces appressed pubescent, subpatent white villous		11 Leonurus deminutus
+	Stems and calyxes appressed gray pubescent		9 Leonurus glaucescens