1	Anterior stamen not arcuate ascending under upper lip of corolla.		(2)
+	Stamens arcuate-ascending under upper lip of corolla.		(4)
2 (1)	Leaves 3-fid; verticillasters widely spaced		41 Nepeta tenuifolia
+	Leaves pinnate to bipinnatipartite; apical verticillasters contiguous.		(3)
3 (2)	Leaves pinnate or pinnatifid, sometimes pinnately lobed to subentire; verticillasters contiguous, rarely interrupted; calyx teeth acute, not spiny		40 Nepeta multifida
+	Leaves bipinnate; basal verticillasters separated; calyx teeth short spiny		42 Nepeta annua
4 (1)	Herbs slender annuals.		(5)
+	Herbs perennial.		(6)
5 (4)	Calyx throat subregular, teeth straight, subequal; nutlets smooth, shiny		39 Nepeta pungens
+	Calyx throat oblique, posterior teeth triangular or oblong-triangular, anterior teeth narrowly lanceolate; nutlets tuberculate		35 Nepeta micrantha
6 (4)	Floral leaves longer than flowers		1 Nepeta longibracteata
+	Floral leaves or bracts small, narrow, not longer than calyx.		(7)
7 (6)	Leaves incised-serrate; plants densely glandular throughout		2 Nepeta glutinosa
+	Leaves not incised-serrate; plants not densely glandular throughout.		(8)
8 (7)	Calyx straight, throat subregular, teeth straight, subulate.		(9)
+	Calyx throat ± oblique or 2-lipped, teeth not subulate.		(11)
9 (8)	Cymes in lax pyramidal panicles; corolla blue, lower lip directed upward, nearly parallel to upper lip		38 Nepeta ucranica
+	Cymes not in pyramidal panicles; corolla purplish or reddish, lower lip directed ± downward, nearly perpendicular to upper lip.		(10)
10 (9)	Plants branched above mid stem; cymes (2-)5-11-flowered, in narrow long panicles; corolla purplish; leaves oblong-ovate or oblong-elliptic to lanceolate, crenate or serrate		36 Nepeta nuda
+	Plants branched almost from base; cymes 5-7-flowered, in narrow racemes; corolla reddish; leaves ovate, dentate-serrate		37 Nepeta virgata
11 (8)	Verticillasters in dense capitula.		(12)
+	Flowers in cymes or verticillasters, in pairs or terminal spikes.		(13)
12 (11)	Stems white floccose-tomentulose; leaves cordate to triangular-cordate, sparsely white tomentose		14 Nepeta floccosa
+	Stems finely pilose; leaves cordate-ovate, with sparse, short lanate hairs		15 Nepeta yanthina
13 (11)	Middle lobe of lower corolla lip concave, margin with incurved lobes or teeth, not swollen, base villous		29 Nepeta cataria
+	Middle lobe of lower corolla lip flat, pendulous or subhorizontal, base swollen, margin slightly undulate, base not swollen, glabrous.		(14)
14 (13)	Flowers in compact terminal spikes, spikes sometimes interrupted, (i.e., with 1-3(-5), widely spaced lower verticillasters).		(15)
+	Flowers in loose or compact, simple or complex cymes.		(25)
15 (14)	Verticillasters in globose to ovoid-globose terminal spikes, sometimes widely spaced basally; stem leaves ± circular.		(16)
+	Verticillasters in cylindric or ovoid spikes but basal (1- or)2-5 widely spaced; stem leaves ovate, ovate-cordate, to oblong-ovate.		(17)
16 (15)	Plants densely tomentose, gray or white; lateral branches sterile		10 Nepeta kokanica
+	Plants densely pubescent; lateral branches fertile		9 Nepeta supina
17 (15)	Stem leaves linear-lanceolate, lanceolate, or oblong-ovate.		(18)
+	Stem leaves ovate to rhombic-ovate or triangular-cordate.		(19)
18 (17)	Corolla yellow; leaves linear-lanceolate, apex acuminate, base rounded to cordate, margin serrate		3 Nepeta nervosa var. lutea
+	Corolla blue; leaves lanceolate to oblong-ovate, apex acute to obtuse, base cuneate to rounded, margin entire, upper ones 1-4-serrate		7 Nepeta densiflora
19 (17)	Leaf bases cuneate, blade ovate or rhombic.		(20)
+	Leaf bases cordate to subtruncate.		(21)
20 (19)	Leaves incised-serrate; calyx tube ca. 2.5 mm; verticillasters in cylindric spikes		11 Nepeta zandaensis
+	Leaves serrate; calyx tube 4.5-5.5 mm; verticillasters in broadly ovoid spikes		8 Nepeta kokamirica
21 (19)	Plants with underground succulent rhizomes		12 Nepeta raphanorhiza
+	Plants without underground succulent rhizomes.		(22)
22 (21)	Stem leaves broadly ovate-cordate, wider than long; apical verticillasters in terminal ovoid spikes 1.2-3.7 cm		13 Nepeta lamiopsis
+	Stem leaves ovate to ovate-cordate or triangular-ovate, longer than wide; verticillasters in cylindric, more elongated spikes.		(23)
23 (22)	Leaves ovate to triangular-ovate, 2.1-6 cm; spikes cylindric, (1.5-)3.5 cm, with 1 or 2 basal, widely spaced verticillasters		4 Nepeta laevigata
+	Leaves ovate to broadly triangular-ovate or ovate-cordate, 0.5-1.25 cm; spikes ovoid-oblong to cylindric, or basally interrupted, 2.5-4 cm.		(24)
24 (23)	Bracts and bracteoles oblong-linear, as long as calyx; flowers sessile; calyx tube subglabrous, teeth ciliolate		5 Nepeta discolor
+	Bracts obovate to narrowly ovate, bracteoles lanceolate-linear, shorter than calyx; flowers pedicellate, pedicel ca. 2 mm; calyx tube pubescent, teeth densely sericeous		6 Nepeta taxkorganica
25 (14)	Calyx throat subregular or slightly oblique, not 2-lipped.		(26)
+	Calyx throat oblique, conspicuously 2-lipped.		(30)
26 (25)	Leaves sessile, leathery		33 Nepeta sessilis
+	Leaves petiolate, membranous or papery.		(27)
27 (26)	Flowers ca. 0.8 cm; leaves triangular-ovate, 1.5-6.4 × 1-5.2 cm, apex acute to apiculate, base cordate, coarsely crenate to dentate		30 Nepeta fordii
+	Flowers more than 2 cm; leaves variable.		(28)
28 (27)	Leaves triangular-cordate, thin papery, dentate-crenate, 4-7.5 × ca. 3.6 cm, apex caudate-acuminate, base truncate to cordate		31 Nepeta everardi
+	Leaves not triangular-cordate.		(29)
29 (28)	Calyx throat slightly oblique, posterior calyx tooth slightly longer, erect, other teeth ± oblique, projected, and narrowly lanceolate; leaves 3.2-10.5 × 1-6.5 cm		32 Nepeta dentata
+	Calyx throat regular, teeth subequal, triangular or lanceolate; leaves ovate-lanceolate to narrowly ovate, 1.5-3 × 1-2 cm, incised-serrate		34 Nepeta sungpanensis
30 (25)	Cymes in dense ovoid spikes 3-5 cm, these to 8.5(-12) cm when elongated		16 Nepeta coerulescens
+	Cymes in lax, long inflorescences.		(31)
31 (30)	Leaves subentire, linear-lanceolate, 2-4 cm × 7-8 mm		28 Nepeta hemsleyana
+	Leaves serrate or crenate, not linear-lanceolate.		(32)
32 (31)	Leaves subsessile or short petiolate.		(33)
+	Leaves with basal petioles more than 1.5 cm, middle petioles 0.3-1.8 cm.		(36)
33 (32)	Leaves less than 2.5 cm, ovate to oblong, tomentose or scaly tomentose		27 Nepeta leucolaena
+	Leaves larger, not tomentose or scaly tomentose.		(34)
34 (33)	Leaves strongly dentate-serrate		24 Nepeta prattii
+	Leaves crenate.		(35)
35 (34)	Leaves oblong-ovate or elliptic-ovate, 4-7.4 × 1.9-3 cm, densely pubescent adaxially		25 Nepeta wilsonii
+	Leaves ovate-oblong to lanceolate-oblong, 2.8-5.2 × 1.1-1.7 cm, densely pubescent especially abaxially		26 Nepeta veitchii
36 (32)	Plants gynomonoecious; pistillate flowers 1.2-1.6 cm, slender		20 Nepeta tenuiflora
+	Flowers bisexual, more than 1.6 cm.		(37)
37 (36)	Leaves pubescent adaxially, densely gray pubescent abaxially, sometimes intermixed with yellow glands		23 Nepeta souliei
+	Leaves pubescent along abaxial veins or puberulent on both surfaces.		(38)
38 (37)	Leaves membranous, puberulent, margin coarsely mucronate-crenate; cymes few flowered		21 Nepeta membranifolia
+	Leaves papery, margin serrate or crenate to entire; cymes many flowered.		(39)
39 (38)	Corolla 1.7-2 cm; middle petioles 2-3 cm, as long as 1/5-1/3 of blade		17 Nepeta manchuriensis
+	Corolla ca. 2 cm; middle petioles less than 2 cm, more than 1/7 as long as blades.		(40)
40 (39)	Verticillasters 2-5-flowered; calyx white strigose, glandular puberulent; leaves oblong-ovate or ovate, 2-3.5 × 1-2 cm		22 Nepeta jomdaensis
+	Verticillasters 5-10-flowered; calyx densely glandular puberulent or glandular pubescent; leaves oblong to lanceolate.		(41)
41 (40)	Leaves 6-10 × 2-2.5 cm; middle petioles 10-18 mm		19 Nepeta stewartiana
+	Leaves 3.4-9 × 1.2-2.2 cm; middle petioles 3-7 mm		18 Nepeta sibirica