206. LABIATAE 47.7^. 



Nutlets rounded at the apex 44. 



44. Anthers all fertile, the halves early confluent at the apex. False whorls of 



flowers axillary. Herbs. — Species 9. North Africa and Cape Verde 

 Islands. Some are used medicinally. " Hore-hound." 



Marrubium L. 

 Anthers of the upper stamens 2-celled, those of the lower nearly always 

 abortive or rudimentary. Disc equal-sided. Calyx 5-toothed. Upper 

 lip of the corolla nearly flat. Leaves undivided. — Species 20. North 

 Africa. Some are used medicinally. (Including Leucophae Webb et 

 Berth.) Sideritis L. 



45. Corolla distinctly two-lipped with a convex, more or less helmet-shaped 



upper lip. Stamens 4, in two pairs of unequal length, ascending under 



the upper hp of the corolla. [Tribe STACH YE AE.] 46 



Corolla two-lipped with a rather flat upper lip, or more or less regular. 

 Leaves undivided. [Tribe SATUREIEAE.] 59 



46. Calyx compressed from front to back, lo-nerved, distinctly 2-hpped ; upper 



lip 3-toothed, lower 2-cleft, bent towards the upper and closing the 

 mouth of the calyx after flowering. CoroUa blue, violet, red, or white ; 

 tube exserted, widened above ; upper lip entire, lower 3-lobed. Fila- 

 ments with an appendage at the apex. Anther-halves separate, diver- 

 gent. Herbs. False whorls 6-flowered, in dense racemes, with im- 

 bricate bracts. [Subtribe brunellinae.] 47 



Calyx more or less equally 5 — lo-toothed, rarely two-lipped, but 

 the lower lip not closing the mouth of the calyx. [Subtribe 



LAMIINAE.] 48 



~4y. Corolla-tube narrow below, widened at the throat, glabrous within ; limb 

 blue or violet ; midlobe of the lower lip two-cleft. Disc one-sided. 

 Style-apex 4-cleft. Nutlets very slimy when wet. Bracts narrow, 



awned. — Species i. North-west Africa Cleonia L. 



Corolla-tube wide, narrow at the throat, with a ring of hairs or scales within ; 

 midlobe of the lower lip concave, toothed. Disc equal-sided. Style- 

 apex 2-cleft. Nutlets not or slightly slimy when wet. Bracts broad. — 

 Species 2. North Africa and Cape Verde Islands ; one species also 

 naturalized in the Mascarene Islands. Used medicinally. {Prunella L.) 



Brunella L. 



48. Style-branches very unequal, the posterior much shorter than the anterior. 



Anther-halves spreading, finally confluent at the apex. Corolla white, 



yellow, or red ; upper lip very hairy. Herbs or undershrubs. . . 49 



Style-branches equal or nearly equal, rarely distinctly unequal, but then 



the upper lip of the corolla almost glabrous 5^ 



49. Upper lip of the corolla much longer than the lower one. Calyx with 



8 — 10 unequal, usually stiff teeth. Disc equal-sided. Leaves toothed. 

 — Species 30. Tropical and South Africa. Some are used as ornamental 



or medicinal plants Leonotis Pers. 



Upper lip of the corolla as long as or shorter than the lower one. . . 50 



