206. LABIATAE 475 



29. Calyx distinctly 2-lipped. Corolla-tube abruptly bent downwards. Disc 



one-sided. Style-apex 2-cleft. False whorls of 6 or more flowers. — 

 Species 5. Central Africa. (Under Plectranthus L'Her.) 



Solenostemon Schum. & Thonn. 

 Calyx subequally 5-toothed. Corolla-tube straight or slightly curved. 30 



30. Corolla-tube curved, gibbous at the base. Disc nearly equal-sided. Style- 



apex notched. Leaves alternate, sometimes almost opposite or whorled. 

 False whorls in terminal racemes. (See 26.) . . Plectranthus L'Her, 

 Corolla-tube straight, not gibbous at the base. Disc one-sided. Style-apex 

 two-cleft. Leaves opposite. False whorls i — 2-flowered, in axillary 

 racemes. — Species 2. Central Africa Englerastrum Briq. 



31. Calyx with an ovate, not much prolonged upper lip and narrower, acumin- 



ate lower teeth, Httle changed in fruit. — Species no. Tropical and 

 South Africa. Some have edible tubers or serve as ornamental or 



medicinal plants Coleus Lour. 



Calyx with a much prolonged upper lip. Herbs or undershrubs. . . 32 



32. Filaments shortly united at the base. Fruiting calyx not bursting ; 



lower teeth suborbicular. Leaves oblong-lanceolate. Inflorescence 



dense, paniculate. — Species i. West Africa. Anisochilus Wall. 



Filaments united halfway up. Lower calyx-teeth acute. Leaves cordate 



at the base 33 



33. Inflorescence lax, panicle- or corymb-like. Leaves ovate. Fruiting 



calyx much enlarged, ventricose, bursting at the base. — Species 3. 



West Africa Neomuellera Briq. 



Inflorescence dense, raceme-like. Leaves oblong-lyrate. Calyx-teeth nar- 

 row. — Species i. West Africa Leocus A. Chev. 



34. (8.) Anther-halves hnear, usually separated by an enlarged connective. 



Stamens usually 2 35 



Anther-halves oblong, ovate, or globose. Stamens usually 4. ... 37 



35. Fertile stamens 4, the lower pair longer. Anthers with a very small 



connective and separate halves divergent below. Corolla obscurely 

 2-lipped ; tube slightly exserted, hairy at the base within. Calyx 

 13— 15-nerved, with 5 subequal acuminate teeth. Shrubs. False 

 whorls few-flowered. — Species i. Naturalized in the Island of Reunion. 

 {Mahya Cordem.) [Tribe HORMINEAE.] . . . Sphacele Benth. 

 Fertile stamens 2, with a lengthened connective. Calyx 2-lipped. . . 36 



36. Anthers with both halves fertile, parallel, and attached to a short con- 



nective. Disc equal-sided. Corolla almost regular, 4-lobed. Shrubs. 

 False whorls many-flowered. — Species i. Abyssinia. Yields con- 

 diments and medicaments. [Tribe MERIANDREAE.] 



Meriandra Benth. 

 Anthers with one half only fertile and attached to one branch of the long 

 connective, the other half abortive or wanting. Disc more or less one- 

 sided. Corolla 2-lipped. — Species 80. Some of them yield condi- 



