1	"Calyx 20-30 mm long, regularly connate, with 5 to l0 lobes"	Moluccella
1	"Calyx to 15 mm long, if longer then 2-lipped or 2-lobed"	2
2	"Calyx scarcely lobed and with the posterior lobe with a broad appendage at the apex"	Lavandula
2	"Calyx distinctly lobed to 2-lipped without an appendage to any lobe"	3
3	"Calyx actinomorphic with lobes about equal"	4
3	"Calyx 2-lobed to 2-lipped or sometimes with 3 broad posterior and 2 narrow anterior lobes"	12
4	"Leaves in whorls of 3 or 4"	Westringia
4	"Leaves opposite"	5
5	"Calyx with 10 setaceous lobes"	Marrubium
5	"Calyx with 5 or fewer lobes"	6
6	"Corolla scarcely zygomorphic, 4-lobed"	7
6	"Corolla 1- or 2-lipped"	8
7	"Mericarps with a concave outer surface and inner surfaces covered with sessile glands; fertile stamens 2; serrations of leaves pointed"	Lycopus
7	"Mericarps with a convex outer surface, and inner surface without glands; fertile stamens usually 4; serrations of leaves usually blunt"	Mentha
8	"Corolla 1-lipped"	9
8	"Corolla 2-lipped"	10
9	"Corolla lip with 3 or 4 lobes, violet, blue to pink, rarely yellow"	Ajuga
9	"Corolla lip with 5 often subequal lobes, white or cream"	Teucrium
10	"Anthers hairy; mericarps narrowly oblong-obovoid, almost trigynous; corolla tube longer than both lips"	Lamium
10	"Anthers glabrous; mericarps broadly obovoid, not keeled; corolla tube as long as or shorter than the anterior lip"	11
11	"Filaments glabrous; calyx with sessile glands"	Nepeta
11	"Filaments hairy; calyx without sessile glands"	Stachys
12	"Lips of calyx entire or almost so"	13
12	"Lips or at least anterior lip of calyx distinctly lobed"	14
13	"Posterior lip of calyx without a protuberance"	Prostanthera
13	"Posterior lip of calyx with a prominent protuberance"	Scutellaria
14	"Calyx hairy on the inside, sometimes only in parts"	15
14	"Calyx glabrous on the inside"	17
15	"Calyx with dense long hairs and without sessile glands"	Stachys
15	"Calyx with sparse short hairs and with sessile glands"	16
16	"Leaves linear, entire"	Thymus
16	"Leaves ovate, serrate"	Calamintha
17	"Inflorescence short and usually in the axils of the leaves; hairs branched"	Rosmarinus
17	"Inflorescence always terminal; hairs simple"	18
18	"Inflorescence compact, with internodes not visible between the part-inflorescences"	Prunella
18	"Inflorescence dissected with internodes visible at least between the lower part-inflorescences"	19
19	"Pedicel longer than or as long as the calyx; anterior lip of corolla not lobed"	Plectranthus
19	"Pedicels rarely to two-thirds of the length of the calyx; anterior lip of corolla 3-lobed"	20
20	"Calyx and corolla without sessile glands; corolla indistinctly 2-lipped"	Melissa
20	"Calyx and corolla with more or less sessile glands; corolla distinctly 2-lipped"	Salvia