546 LABIAT 
I2 Nepeta Erect plants: flowers verticillastrate-glomerate and spicate : 
calyx tubular, not bilabiate, nearly equally 2-toothed. 
18 GuEcoma Trailing plants: flowers axillary: calyx unequally 5-toothed. 
14 Dracocephalum Erect plants with glomerate-spicate inflorescence: 
calyx bilabiate, the upper tooth iargest. 
TRIBE v Stamens 4, ascending and parallel, all fertile; the 
the anterior pair longer with the anthers by abortion one-celled; 
those of the posterior pair 2-celled. 
15 Secutellaria Calyx with a strong projection on the upper side. 
TRIBE vi Stamens 4, all fertile, parallel and ascending under 
the concave or somewhat galeate upper lip of the bilabiate corolla. 
* Calyx reticulate-veiny, membranaceous or chartaceous, more or 
less inflated, deeply bilabiate; the lips flattened and closed in fruit; 
upper lip plain and broad: corolla with inflated throat from a more or 
less exgerted tube. 
16 Brunella Inflorescence verticillastrate-capitate or spicate: calyx ob- 
long, somewhat 10-nerved, upper lip truncate, 3-toothed. 
* * Calyx more or less membranaceous and inflated or enlarged 
after flowering, obscurely nerved, but somewhat veiny, 3-5-lobed, not 
bilabiate, open: corolla showy ; throat inflated, upper lip more or less 
concave, not galeate: filaments more or less villous. 
17 Physostegia Flowers simply opposite in the axils of the leaves or 
bracts: calyx nearly regular and equally 5-toothed. 
* * * Calyx of firmer texture, distinctly 5-10-nerved or striate, 
5-10-toothed. : 
+ Stamens included in.the short tube of the corolla, the upper lip 
of which is merely concave. 
18 Marrvstum Calyx tubular-cylindraceous, strongly ribbed, and with 
5 or 10 subulate or spinulose teeth. 
+ + Stamens ascending under the galeate upper lip of the corolla 
19 Reorcans Calyx turbinate, 5-nerved, and with 5 subulate spinescent 
teeth. 
20 Lamium Calyx tubular or turbinate-campanulate, the 5 teeth subu- 
late but not spinescent. 
+ + + Stamens all orthe lower pair sometimes deflexed to the 
sides of the throat or contorted after anthesis. 
21 Stachys Calyx tubular-campanulate or turbinate, 5-10-nerved and 
5-toothed. 
I Nutlets rugose-reticulated, with introrsely very oblique or 
even ventral and comparatively large scar of attachment. Ovary 
merely 4-lobed or not very deeply 4-parted. Seeds exalbuminous. 
Tribe 1 Ajugoidex Benth. in DC. Prodr. xvi, 571. Calyx 5-10- 
nerved. Stamens ascending, mostly exserted from the wpper side of 
the corolla, 4 in our genera. Ovules and seeds more or less ampht- 
tropous. Nutlets obovoid, dry. : 
