Key to Group B

1	Spiny shrubs or subshrubs		(2)
+	Shrubs or perennial herbs without spines		(3)
2 (1)	Calyx lobes ± erect and oblong in fruit; leaves simple to pinnate		25 Lagochilus
+	Calyx limb spreading and irregularly 5 or more toothed in fruit; leaves simple		28 Otostegia
3 (1)	Leaf margin entire		(4)
+	Leaf margin not entire		(6)
4 (3)	Inflorescence a terminal congested spike [cultivated]		5 Lavandula
+	Inflorescence of ± distant verticillasters [cultivated or native]		(5)
5 (4)	Evergreen pleasantly aromatic shrub; stamens 2 [cultivated]		3 Rosmarinus
+	Perennial malodorous herb; stamens 4 [native]		30 Stachys
6 (3)	Stamens 2.		(7)
+	Stamens 4.		(8)
7 (6)	Corolla c. 10 mm long, ± violet-blue; leaves not divided to pinna tisect [native]		34 Perovskia
+	Corolla 6-7 mm long, whitish; leaves not divided [cultivated]		35 Meriandra
8 (6)	Inflorescence of cymes borne on slender lateral branches		54 Isodon
+	Inflorescence of ± sessile verti cillasters		(9)
9 (8)	Calyx throat densely bearded internally		7 Marrubium
+	Calyx throat glabrous or pilose internally		(10)
10 (9)	Corolla 6-10 mm long; calyx 35-5 mm long; nutlets rounded		(11)
+	Corolla more than 20 mm long; calyx more than 10 mm long; nutlets truncate (See also Colquhounia coccinea Wall at the end of "Labiatae" description).		(12)
11 (10)	Corolla rose to magenta, 6-7 mm, upper and lower lips scarcely differentiated; tube squat, included in calyx		30 Stachys
+	Corolla whitish mauve, 10 mm long, upper and lower lips clearly differentiated		9 Nepeta
12 (10)	Leaves not divided; corolla rose to violet; nutlets apically ± glabrous		18 Phlomis
+	Leaves pinnatisect, coarsely lobed or not divided; corolla yellow, pink or white; nutlets apically densely bearded		17 Eremostachys