1	Stamens long exerted; corolla ca. 0.8 cm		35 Dracocephalum stamineum
+	Stamens included or only short exserted; corolla 1-4.2 cm.		(2)
2 (1)	Dwarf cespitose plants, stems 3-15 cm; branches numerous, crowded; leaves 3-5 mm, circular-ovate, pinnati- or palmatipartite.		(3)
+	Stems erect or suberect, taller, unbranched or few branched; leaves more than 10 mm, simple to pinnatisect.		(5)
3 (2)	Middle tooth of upper lip of calyx slightly wider than lateral teeth, upper lip teeth the same shape; leaves palmately 5-parted		30 Dracocephalum palmatoides
+	Middle tooth of upper lip of calyx 2.5-5 × wider than lateral teeth, broadly ovate, lateral teeth lanceolate to narrowly triangular; leaves pinnatifid.		(4)
4 (3)	Middle tooth of upper lip of calyx ca. 2.5 × wider than lateral teeth		31 Dracocephalum origanoides
+	Middle tooth of upper lip of calyx 4-5 × wider than lateral teeth		32 Dracocephalum paulsenii
5 (2)	Leaves pinnatisect, segments linear.		(6)
+	Leaves undivided.		(13)
6 (5)	Calyx conspicuously 2-lipped; leaves sometimes 2-pinnatifid		8 Dracocephalum bipinnatum
+	Calyx of 5 subequal teeth, lanceolate to narrowly triangular; leaves clearly pinnatisect.		(7)
7 (6)	Leaf sections 2- or 3-paired, crowded toward blade base, appearing palmatisect.		(8)
+	Leaf segments not crowded at blade base.		(10)
8 (7)	Flowers 2.5-2.8 cm; leaf segments suberect		5 Dracocephalum forrestii
+	Flowers 3.5-4.2 cm; leaf segments oblique or subpatent.		(9)
9 (8)	Calyx densely lanate-villous, teeth 1/4-1/3 as long as tube, teeth lanceolate-triangular, subulate- acuminate		6 Dracocephalum isabellae
+	Calyx slightly scabrid, teeth ca. as long as tube, lanceolate, acute		7 Dracocephalum hookeri
10 (7)	Corolla less than 1.5 cm		3 Dracocephalum propinquum
+	Corolla more than 2 cm.		(11)
11 (10)	Internodes 1-1.2 cm; leaves abaxially strigose on nerves		1 Dracocephalum taliense
+	Internodes 2-6 cm; leaves abaxially densely white pubescent.		(12)
12 (11)	Upper floral leaves much shorter than calyx		4 Dracocephalum tanguticum
+	Upper floral leaves as long as to longer than calyx		2 Dracocephalum calophyllum
13 (5)	Leaves entire.		(14)
+	Leaves serrate or dentate.		(17)
14 (13)	Bracts 2- or 3-serrulate; corolla 1.4-1.8 cm; teeth of upper lip of calyx divided almost to base, middle tooth of upper lip ca. 2 × as wide as lateral teeth; anthers glabrous.		(15)
+	Bracts entire; corolla more than 1.8 cm; teeth of upper lip of calyx divided to nearly 1/2 its length, middle tooth of upper lip slightly wider than lateral teeth; anthers hairy.		(16)
15 (14)	Leaves lanceolate to ovate-lanceolate, 1.5-3 × 4-8 mm, entire		15 Dracocephalum integrifolium
+	Leaves linear, 5-7 × 0.8-1.2 mm, 2- or 3-serrulate; teeth with apical spines to 3 mm		14 Dracocephalum fruticulosum
16 (14)	Stems subglabrous; calyx minutely hairy toward base, subglabrous toward apex; corolla 3.3-4 cm		34 Dracocephalum argunense
+	Stems sparsely minute hairy toward base; calyx minutely hairy throughout; corolla 1.7-2.4 cm		33 Dracocephalum ruyschiana
17 (13)	Calyx conspicuously 2-lipped.		(18)
+	Calyx inconspicuously 2-lipped.		(21)
18 (17)	Calyx 2-lipped nearly to base		11 Dracocephalum breviflorum
+	Calyx 2-lipped to ca. 1/2 its length.		(19)
19 (18)	Leaves ovate, base ± cordate, crenate; bracts 3-8-spinescent-serrate; corolla white		9 Dracocephalum heterophyllum
+	Leaves lanceolate or narrowly oblong, base cuneate to rounded, denticulate; bracts 1-3-spinescent-serrate; corolla blue-purple.		(20)
20 (19)	Perennial herbs; leaves ± leathery, base cuneate, few spinescent-denticulate		10 Dracocephalum peregrinum
+	Annual herbs; leaves herbaceous, base rounded to broadly cuneate, densely dentate with teeth not spinescent or sometimes basal teeth spinescent		12 Dracocephalum moldavica
21 (17)	Middle tooth of upper lip ± same shape as lateral teeth, nearly as wide as to wider than lateral teeth.		(22)
+	Middle tooth of upper lip of calyx wider than lateral teeth, circular-ovate; lateral teeth broadly lanceolate to narrowly triangular.		(25)
22 (21)	Basal leaves absent; cauline leaves many paired, short petiolate, elliptic to ovate-elliptic, 5-6 mm, 1-3-denticulate; calyx teeth 5, subequal; bracts spinescent-serrate		13 Dracocephalum psammophilum
+	Basal leaves present.		(23)
23 (22)	Cauline leaves many paired, broadly ovate; verticillasters in long spikes		16 Dracocephalum nutans
+	Cauline leaves 2-6-paired, ovate to triangular-ovate; verticillasters crowded in capitula.		(24)
24 (23)	Calyx minutely papillate hirtellous, glandular		19 Dracocephalum rigidulum
+	Calyx pubescent to silky-villous, margin white ciliate		20 Dracocephalum imberbe
25 (21)	Basal petiole much shorter than blade; blade ovate to broadly ovate, 0.6-2 cm, incised-dentate.		(26)
+	Basal petiole slightly shorter to longer than blade.		(27)
26 (25)	Corolla yellowish white, middle lobe of lower lip not spotted		17 Dracocephalum nodulosum
+	Corolla purple, middle lobe of lower lip purple spotted		18 Dracocephalum hoboksarensis
27 (25)	Corolla slightly exserted		22 Dracocephalum velutinum
+	Corolla 1.5-2 × as long as calyx.		(28)
28 (27)	Middle tooth of upper lip of calyx subtruncate.		(29)
+	Middle tooth of upper lip of calyx rounded.		(30)
29 (28)	Middle tooth of upper lip of calyx broadly elliptic, obtuse, short spinescent		26 Dracocephalum purdomii
+	Middle tooth of upper lip of calyx trapeziform, truncate, denticulate		27 Dracocephalum truncatum
30 (28)	Leaves abaxially densely white pubescent		21 Dracocephalum wallichii
+	Leaves abaxially sparsely strigose.		(31)
31 (30)	Petioles of middle cauline leaves 2-6 cm		29 Dracocephalum rupestre
+	Petioles of middle cauline leaves less than 1.2 cm or obsolete.		(32)
32 (31)	Floral leaves coarsely dentate; corolla 3.3-4 cm		28 Dracocephalum grandiflorum
+	Floral leaves not coarsely dentate; corolla 2-3.5 cm.		(33)
33 (32)	Leaves abaxially purplish, sparsely pubescent on veins or glabrous		25 Dracocephalum bullatum
+	Leaves abaxially densely puberulent, sparsely floccose-villous on veins.		(34)
34 (33)	Bracts subcircular, subentire		24 Dracocephalum imbricatum
+	Bracts obovate to rhombic obovate, margin densely ciliate, 1-3-spinescent-serrate		23 Dracocephalum microflorum