LABIATA (Brown, Cooke and Skan). 229 
Tribe 4. NEePeTEx.—Calyx usually 15-nerved, equal or often oblique, 5-toothed 
or somewhat 2-lipped ; upper teeth usually largest. Corolla 2-lipped ; lips 
rather large, the upper concave. Stamens 4 (rarely 2), the upper pair 
longer, all ascending under the upper lip or sometimes divergent ; anthers 
2-celled ; cells more or less divaricate, sometimes parallel. 
XVII. Cedronella.—The only genus in South Africa, where it is naturalized. 
Leaves 3-foliolate. Anther-cells parallel. 
Tribe 5. SracHypEa#.—Calyx 5-10-nerved, equally or unequally 5-10-toothed 
(rarely many-toothed), rarely sometimes 2-lipped. Corolla 2-lipped ; lips 
usually large, the upper erect and usually concave. Stamens 4, the lower 
pair longer, all ascending under the upper lip or sometimes included in the 
tube ; anthers 2-celled or rarely 1-celled ; cells divergent or divaricate or 
confluent, sometimes parallel. 
XVIII. Acrotome.—Calyx tubular or campanulate, prominently 10-nerved, 
5-10-toothed. Corolla-tube often exserted ; upper lip somewhat 
arched. Stamens included in the tube; anther-cells confluent. 
Nutlets truncate at the apex. 
XIX. Stachys.—Calyx usually campanulate, 5-10-nerved, equally or subequally 
5-toothed, rarely somewhat 2-lipped. Corolla-tube included or 
exserted. Stamens exserted ; anther-cells finally divaricate. Nutlets 
rounded at the apex. 
XX. Ballota.-—Calyx somewhat funnel-shaped, tubular at the base, 10-nerved, 
5-10- or sometimes many-toothed ; teeth dilated at the base or 
connate in a spreading orbicular or oblique limb. Corolla-tube 
subincluded. Stamens exserted; anther-cells finally divaricate. 
Style subequally 2-lobed. Nutlets rounded at the apex. 
XXI. Leucas.—Calyx tubular, campanulate or sometimes inflated, equal or 
oblique at the mouth, equally or subequally 6-10-toothed, Corolla 
usually white ; tube included ; lower lip usually about as large as the 
upper, not soon withering ; median lobe largest. Stamens exserted ; 
anther-cells divaricate, finally confluent. Style very unequally 
2-lobed. Nutlets scarcely truncate at the apex. 
XXII. Lasiocorys.—Calyx 5-toothed. Otherwise as in Leucas. 
XXIII. Leonotis.—Calyx tubular, oblique at the mouth, 10-nerved, 8-10-toothed ; 
upper tooth usually much the largest. Corolla often orange ; tube 
often exserted ; upper lip elongated; lower lip much smaller, 
subequally 3-lobed, soon withering. Stamens exserted ; anther-cells 
divaricate, subconfluent. Nutlets ovoid-triquetrous, obtuse or 
truncate at the apex. 
Tribe 6. AsucomEex.—Calyx 10--or irregularly many-nerved, equally 5-toothed 
or with the uppermost tooth largest, sometimes 2-lipped, with entire lips. 
Corolla in the South African genera 1-lipped or with a very short upper lip 
and a relatively large lower lip. Stamens 4, more rarely 2, the lower pair 
longer, all ascending; anthers 2-celled; cells parallel, divergent or 
divaricate, sometimes confluent. Ovary shortly 4-lobed or lobed to the 
middle. Nutlets with an oblique or lateral usually large areole. (In the 
other tribes the ovary is deeply 4-lobed and the nutlets have a small basal 
or slightly oblique areole.) 
XXIV. Tinnea,—Calyx 2-lipped, inflated in fruit. Corolla 2-lipped. Stamens 
rarely exserted. 
XXV. Teucrium.—Calyx equally 5-toothed or the uppermost tooth broadest and 
sometimes very large. Corolla 1-lipped. Stamens long-exserted, 
XXVI. Ajuga. —Calyx subequally 5-toothed. Corolla 2-lipped. Stamens ex« 
serted. 
