176. 132. LABIATAE. 



Nutlets with a small basal or sub-basal surface of attachment. 

 Corolla 2 lipped or 4 — 5 lobed. Ovary deeply lobed or 

 divided. 3. 



2. Corolla 1 lipped, all its lobes being placed below the stamens. 



Lobes 5, lowermost largest. 20 TEUCRIUM. 



Corolla 2 lipped with short upper lip subentire or 2 fid. Lower 



lip spreading, 3 lobed. 21 AJUGA. 



3. Stamens descending on the lower lip or the lower part of the 



corolla or lying upon it. Anther halves spreading con- 

 fluent at the apex. Corolla 2 lipped or nearly regular. 

 Upper lip flattish or not hooded. Lower lip nearly always 

 entire. (Ocimoideae.) 4. 



Stamens ascending or projecting straight forwards. Corolla 

 2 lipped with convex upper and 3 lobed lower lip or sub- 

 equally 4 — 5 cleft. I4. 



4. Flowers unisexual but with an ovary in male flowers which 



is never fertile, the sexes on different plants. Calyx 

 minute. Corolla very small. Stamens equally spreading. 



11 IBOZA. 

 Flowers hermaphrodite, all with a fertile ovary. 5. 



5. Corolla obscurely 2 lipped, 4 lobed, very small stamens included 



in corolla tube. 9 ENDOSTEMON. 



Corolla distinctly 2 lipped, or if obscurely, then 5 lobed. 



Stamens exserted. 6. 



6. Calyx very small, falling away by a clean cut, just above the 



base in the fruit. Stamens all free. 



8 AEOLANTHUS. 

 Calyx persistent in the fruit, distinctly 3-5 toothed. 7. 



7. Upper pair of filaments bent like a knee or toothed or crested 



near the base. Stjde apex 2 cleft or distinctly notched. 8 



Upper pair of filaments not kneed, toothed or crested, but 



sometimes bearded or ciliate. Lower pair or all sometimes 



united. 9. 



8. Upper teeth of the calyx separated from the others by a broad 



space which is ciliate or small toothed along its margin. 



1 BECIUM. 

 No broad space separating upper calyx teeth from the others. 



2 OCIMUM. 



9. Tall annual. Lower lip of corolla short, saccate abruptly bent 



downwards, narrowed at the base. 4 upper lobes flat. 



10 HYPTIS. 

 If lower lip of corolla reflexed, then upper unequally 3 lobed. 10. 

 10. Calyx with 5 equal rigid spinelike teeth. False whorls ar- 

 ranged in dense spikes, 7 PYCNOSTACHYS. 

 Calyx unequally toothed ,or if teeth equal, then not rigid and 

 spinelike or flowers not in very dense spikes. U. 



