546 LABIATE 



12 Nepeta Erect plants : flowera verticillastrate-glomerate and spicate : 

 calyx tubular, not bilabiate, nearly equally 2-toothed. 



13 Glecoma Trailing plants : flowers axillary: calyx unequally 5-toothed. 



14 Dracocephalum Erect plants with glomerate-spicate inflorescence : 

 calyx bilabiate, the upper tooth largest. 



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 Scutellaria 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 exserted tube. 



16 Bruuella 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. 



* * * Calvx of firmer texture, distinctly 5-10-nerved or striate, 

 5-10-toothed." 



y Stamens included in the short tube of the corolla, the upper lip 

 of which is merely concave. 



18 Marrubhjm 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 Leonurus 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 or the lower pair sometimes deflexed to the 

 sides of the throat or contorted after an thesis. 



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. xii, 571. Calyx 5-10- 

 nerved. Stamens ascending, mostly exserted from the upper side oj 

 the corolla, 4 i n our genera. Ovules and seeds more or less amphi- 

 tropous. Nutlets obovoid, dry. 



