1	"Calyx 2-lipped; lips toothed or not"	2
1	"Calyx 5–10-toothed, not divided into 2 lips"	9
2	"Calyx with adaxial lip emarginate to undivided"	3
2	"Calyx with adaxial lip deeply 3-lobed or truncate with 3 sharp, almost obsolete teeth-like lobes"	6
3	"Calyx with abaxial lip deeply 4-toothed"	4
3	"Calyx with abaxial lip emarginate or undivided"	5
4	"Calyx with pedicel attached eccentrally to the base of the calyx tube, opposite the posterior lip; corolla with upper lip distinctly shorter than lower"	Coleus
4	"Calyx with pedicel attached centrally to the base of the calyx tube; corolla lobes more or less equal in length"	Plectranthus
5	"Woody subshrubs to trees; adaxial calyx-lip without a prominent swelling"	Prostanthera
5	"Perennial herbs; adaxial calyx-lip with a hollow prominent swelling"	Scutellaria
6	"Fertile stamens 2 (minute staminodes sometimes present); anthers with locules separated by an elongated connective, 1 locule often sterile"	Salvia
6	"Fertile stamens 4; anthers 2- or 1-locular; connective not elongated"	7
7	"Flowers in terminal spike-like inflorescences, subtended by large broadly ovate overlapping bracts; corolla-tube scarcely longer than calyx; stamens straight"	Prunella
7	"Flowers in axillary pseudowhorls, without differentiated bracts (but with small bracteoles); corolla distinctly exceeding calyx; stamens curved"	8
8	"Leaves more or less odourless; bracteoles bristle-like, long-ciliate; calyx-lobes all long-acuminate; corolla pink to magenta"	"Clinopodium {Clinopodium vulgare}"
8	"Leaves strongly lemon-scented; bracteoles ovate to obovate; adaxial lip of calyx with 3 short broadly triangular teeth; corolla white or pinkish"	"Melissa {Melissa officinalis}"
9	"Corolla more or less equally 4-lobed to indistinctly 2-lipped"	10
9	"Corolla distinctly 1- or 2-lipped"	12
10	"Flowers in compact, spike-like inflorescences, with overlapping mauve bracts vir- tually covering the sessile 3-flowered cymes (Lavender)"	"Lavandula {Lavandula stoechas}"
10	"Flowers in axillary cymose whorls or pseudowhorls, in the axils of leaf-like bracts or solitary in leaf-axils; bracts not overlapping"	11
11	"Stamens 2; staminodes 2; leaves stiff, with margins sharply toothed"	"Lycopus {Lycopus australis}"
11	"Stamens 4; leaves mostly soft, with margins entire or variously toothed, but never sharply toothed (Mints)"	Mentha
12	"Corolla 1-lipped or apparently so (either adaxial lip slit so that the abaxial lip appears 5-lobed, or adaxial lip much-reduced and inconspicuous)"	13
12	"Corolla 2-lipped"	14
13	"Corolla blue to purple, rarely pinkish to white; adaxial lip inconspicuous; abaxial lip 3-lobed; leaves (other than in inflorescence) often congested and rosette-like at base"	"Ajuga {Ajuga australis}"
13	"Corolla white; adaxial lip slit so that the abaxial lip appears 5-lobed; leaves cauline"	Teucrium
14	"Leaves trifoliolate"	"Cedronella {Cedronella canariensis}"
14	"Leaves simple (but sometimes deeply lobed)"	15
15	"Leaves in whorls of 3–5"	Westringia
15	"Leaves opposite"	16
16	"Calyx 8–10-toothed"	"Marrubium {Marrubium vulgare}"
16	"Calyx 5-toothed, sometimes only minutely toothed"	17
17	"Calyx expanded and bonnet-like, much longer than corolla; teeth minute"	"Moluccella {Moluccella laevis}"
17	"Calyx not expanded, shorter or as long as corolla; teeth well developed"	18
18	"Corolla with adaxial lip broadly oblong, flat, erect, 2-lobed, not hooded"	"Nepeta {Nepeta cataria}"
18	"Corolla with adaxial lip hooded"	19
19	"Upper leaves sessile, amplexicaule, subtending and embracing the flowers, c. equal to lower petiolate leaves"	Lamium
19	"Upper leaves subtending flowers petiolate, not embracing the flowers, noticeably reduced in size"	20
20	"Perennial herb to 2 m high; inflorescences usually more than 12-flowered per leaf- axil; calyx 7–13 mm long"	Ballota
20	"Annual herb to 0.4 m high; inflorescences mostly 3-flowered per bract or leaf-axil; calyx 5–7 mm long"	"Stachys {Stachys arvensis}"