144 MINT ORDER 



b. Calyx more or less equally 4-5-toothed, rarely 

 10-toothed 



(1) Corolla regular or nearly so, 4-cleft MENTHA 



(2) Corolla 2-lipped 



(a) Calyx 10-toothed; leaves white-woolly MARRUBIUM 



(b) Calyx 4-5-toothed 



x. Upper tooth much larger than the other 

 4; flowers light blue in a dense termi- 

 nal spike DRACOCEPHALUM 

 y. Teeth equal in size or nearly so 



(x) Calyx swollen in fruit; flowers pur- 

 ple, 10-12 mm. long PHYSOSTEGIA 

 (y) Calyx not swollen in fruit 

 m. Calyx teeth rigid, spiny; corolla 



hairy LEONURUS 



n. Calyx teeth not rigid and spiny 



(m) Flowers in heads MONARDELLA 



(n) Flowers not in heads 

 r. Lower or outer stamens short- 

 er than the inner 

 (r) Anther halves parallel and 



touching AGASTACHE 



(s) Anther halves spreading NEPETA 

 s. Lower or outer stamens longer 



than the inner STACHYS 



AGASTACHE Clayton 1762 GIANT HYSSOP 



(Gr. agan, much, many, stachys, spike) 



Sepals 5, united into a narrow bell-shaped, somewhat oblique, slightly 

 2-lipped calyx, petals 5, yellowish, purplish or blue, united into a strongly 

 2-lipped corolla, upper lip erect, 2-lobed, lower lip spreading, 3-lobed, 

 stamens 4 in pairs on the corolla-tube, the upper or inner pair longer, ovary 

 deeply 4-parted, style 2-cleft, nutlets ovoid, smooth; flowers in dense 

 terminal spikes ; leaves toothed, mainly ovate, stalked ; perennial. 



1. Flowers blue; calyx-teeth acute; leaves gray be- 



neath A. anethiodora 



2. Flowers pale violet or purplish ; calyx-teeth long- 



pointed ; leaves green beneath A. iirticifolia 



CLINOPODIUM Linne 1753 WILD BASIL 



(Gr. klinos, bed, podion, little foot) 

 Sepals 5, united into a 2-lipped, tubular or oblong calyx, upper lip 



