404 cii. LABiATTE (baker.) [Plectvanthus. 



upper tooth broad, ovate or roundish, obtuse; lateral deltoid, acute; 

 lower lanceolate, acuminate. 



Upper Guinea. Cumeroons : near linen, 7000 ft., Preuss, 1019. 



12. P. ovatifolius, Oliv. in. Trans. Linn. Soc. xxix. 180, t. 135. 

 An erect perennial, with many erecto-patent pubescent branches. 

 Leaves many, shortly petioled, ovate, acute, membranous, pubescent, 

 about 1 in. long. Inflorescence a lax terminal racemose panicle ; 

 branches 3-4 in. long; whorls few-flowered ; pedicels pubescent, |-J in. 

 long. Fruit-calyx \ in. long ; upper tooth ovate, mucronate, shorter 

 than the tube, with decurrent edges ; lateral teeth small cusps ; lower 

 teeth large cusps. Corolla -J in. long. 



Xile ILand. British East Africa : Madi ; in patches on flat gronnd near the 

 Madi Burn, Speke Sf Orant ! 



13. P. prostratuSy Garke in Engl. Jahrh. xix, 206. Stems 

 creeping, rooting at the nodes, pubescent. Leaves shortly petioled, 

 small, obovate, fleshy, cuneate at the base, obtuse, undulated or obso- 

 letely crenate on the margin, with a few adpressed hairs on both sides. 

 Inflorescence racemose, lax; whorls G-10-flowered ; cymes sessile; 

 pedicels 4-J in. long, clothed like the calyx, with adpressed whitish 

 hairs ; bracts ovate, obtuse. Fruit-calyx yV~ i ^^' ^^^^ ' upper tooth 

 round-ovate, subacute ; the rest subequal, lanceolate, acuminate. 

 Corolla violet. 



XlSozaml). Bist. German East Africa : at the foot of Rhinoceros Hill, at 

 Pangani Ford, about 2700 ft., Volkens, 484 ; Ukirn, east of Victoria Nyanza, Fischer ^ 

 497. 



14. P. Fischeri, Giirke in Engl. Jahrh. xix. 200. Undershrub. 

 Stems erect or ascending, pubescent above, glabrescent below. Leaves 

 obovate or suborbicular, narrowed to a short petiole, obtuse or sub- 

 acute, entire or obscurely crenate, J-lJ in. long, thick, pubescent on 

 both sides. Inflorescence racemose, very dense, terminal or shortly 

 peduncled in the axils of the upper leaves ; pedicels longer than the 

 calyx ; bracts suborbicular or ovate, acute, \-\ in. long. Calyx y\y in. 

 long, clothed with long hairs ; upper tooth larger, ovate ; lower sub- 

 equal, deltoid. Corolla blue ; tube erect, pubescent; lips villous, out- 

 side. 



nXozamb. Slst. German East Africa : hanging from rocks, near a stream in a 

 forest on the slopes of Ugweno Mountain, near Kilimanjaro, 3900 ft., Volkens, 518 ; 

 Masai Highlands, Fischer, ser. I. 77, ser. II. 501. 



It has the habit of P. cylindraceus, Hochst. 



15. P. insignis. Hook f. in Journ. Linn. Soc. vii. 210. A much- 

 branched erect perennial herb, with stems 10-15 ft. long. Leaves 

 long-petioled, oblong, membranous, inciso-crenate, slightly pubescent, 

 acute, narrowed gradually from the middle to the base, the lower 

 6-9 in. long, 3-4 in. broad at the middle. Inflorescence a very lax 

 ample terminal racemose panicle, the end branch 0-0 in. long ; whorl& 



