314 LABIATJE. (MINT FAMILY.) 
— -v- Stamens 4, the upper pair longer. 
11. Cedronella. Stamens all ascending. Upper lip of the corolla 
flattish ; the throat much enlarged. Anther-cells parallel. 
12. Nepeta. Stamens all ascending. Upper lip of the corolla more 
or less concave or vaulted. Anthers mostly approximate m 
pairs; the cells divergent. 
13. Dracocephalum. Stamens all ascending. Anther-cells diverg¬ 
ing. Upper tooth of the calyx largest, ovate. Bracts awn¬ 
toothed. 
14. Lophanthus. Stamens diverging; the upper pair curved down¬ 
ward, the lower ascending. 
Stamens 4, the lower pair longer. 
Stamens straight, distant or divergent. Upper lip of the coro a 
nearly flat. 
15. Pycnanthemum. Calyx equally 5-toothed, or slightly 2 ippe ? 
naked in the throat. 
16. Thymus. Calyx 2-lipped, woolly in the throat. 
-M- Stamens ascending, approximate in pairs under the concave or 
vaulted upper lip. - 
= Calyx 13-nerved, more or less 2-lipped, 5-toothed. Upper ip 0 
the corolla flattish. 
17. Calamintha. Calyx woolly in the throat. Flowers loose. 
18. Clinopodium. Calyx nearly naked in the throat. Flowers c us 
tered : bracts awl-shaped. 
19. Melissa. Calyx naked in the throat. Flowers loose. ra 
ovate. . e . tt 0 . 
== = Calyx irregularly nerved or veiny, 2-lipped, closed m fruit. P 
.per lip of the corolla arched. 
20. Prunella. Upper lip of the calyx truncate, 3-toothed, flat- 
21. Scutellaria. Lips of the vaulted calyx entire. 
== = == Calyx 5- 10-nerved or veiny, nearly equal, 3 - 10-toot ie • 
22. Synandra. Calyx 4-toothed. Filaments bearded above: an 
of the shorter pair united by one of their cells. 
23. Physostegia. Calyx 5-tootbed, obscurely veiny, inflate e 
shaped after flowering. Upper lip of the inflate coro 
somewhat spreading. Throat 
24. Lamium. Calyx 5-nerved, 5-toothed, the teeth not spiny. 
of the corolla inflated : lateral lobes truncate, or wit a 
like appendage. , teet b 
25. Leonurus. Calyx 5-nerved, 5-toothed, the awl-snap 
rigid or spine-like. Lateral lobes of the coro a o 
Achenia truncate. Valves of the anther naked. ^ 
26. Galeopsis. Calyx 5-10-nerved, with 5 somewhat spiny-p°i 
teeth. Throat of the corolla inflated. Anthers transvers 
2-valved, the smaller valve bristly-fringed. 
