Tnchostachys.'] Lxx. RUBiACEiE (hiern). 227 



leaves, oval or lanceolate stipules and small white flowers densely 

 packed in globose or oblong terminal exinvolucrate heads. 

 A genus limited to this Flora. 

 Calyx-lobes ovate, shorter than the tube of the limb. 



Leaves glabrous, 12-15 in. long 1. T.longifolia. 



Leaves shortly pubescent on veins beneath, 4^-6 in. long . 2. T. petiolata. 



Calyx-lobes lanceolate, equalling the tube of the" limb ... 3. T. aurea. 

 Calyx-lobes linear-lanceolate, long-ciliate, longer than the tube 



of the limb 4. 71 cili 'a. 



1. T. long'ifolia, Hiern. Stem or branches compressed above, 

 nearly glabrous. Leaves oblanceolate, shortly and acutely acuminate, 

 gradually narrowing to a subsessile base, glabrous, firmly chartaceous, 

 12-15 by 'S \ d ' a in., lateral veins about 14-16 pairs, clearly marked 

 beneath ; stipules oval, obtuse, undivided, 1-1:J- by f-| in., ciliate. 

 Flowers 5-6-merous, ^ ? in. long, numerous, crowded in dense subter- 

 minal pedunculate globose heads of ^ in. diameter ; common peduncle 

 1-2 in. long, densely hirsute-hispid, erect. Calyx about ^ in. long ; 

 limb tubular, with obtuse ovate lobes. Corolla hairy inside on the lobes 

 and shaggy at the throat ; tube glabrous inside. Style glabrous. 



Upper Guinea. Gaboon Kiver, Mann ! 



2. T. petiolata, Hiern. Stem or branches hairy above. Leaves 

 obovate-oval, mucronate, somewhat narrowed towards the rounded 

 petiolate base, chartaceous, glabrous above, shortly pubescent beneath on 

 the midrib and about 9 pairs of lateral veins, 4^-6 by 2-2^ in. ; petiolo 

 ^-| in. long, densely hairy ; stipules ovate-oblong, obtuse, nearly ^ in. 

 iong. Flowers numerous, densely packed in oblong terminal and sub- 

 terminal pedunculate heads of 1-1^ in. long. Calyx and corolla white. 

 Calyx-limb 4-5-lobed ; lobes short, ovate, shortly ciliate. 



Upper Guinea. Cameroon River, Mann ! 



3. T. aurea, Hiern. 1-2 feet high. Stem or branches hairy 

 above. Leaves obovate-oval, cuspidate-acuminate, wedge-shaped at 

 the subsessile base, glabrous above except the hirsute midrib, firmly 

 chartaceous, 3^6 by 2-3:J^ in., margins ciliate, hairs golden, lateral 

 veins about 9-11 pairs ; stipules lanceolate, J in. long, ciliate. Flowers 

 pentamerous, small, numerous, crowded in dense ellipsoidal peduncu- 

 late terminal heads -J in. long. Calyx-limb half cleft; lobes lanceo- 

 late, hairy. 



X7pper Guinea. Sierra del Crystal, Mann ! 



4. T. ciliata, Hiern. Stem short, terete below, hispid above. 

 Leaves obovate, cuspidate-apiculate, strigose-hispid on both sides, 

 gradually narrowed to a shortly petiolate base, 3^5 by 1^-2^ in., 

 lateral veins about 6 pairs, inconspicuous ; stipules sheathing, \ in. 

 long. Flowers pentamerous, numerous, very shortly pedicellate, in 

 dense hemispherical terminal heads of 1-1^ in. diameter. Calyx 

 ^-J in. long ; teeth linear-lanceolate, long-ciliate. Corolla hispid on 

 the lobes. 



Upper Guinea. Sierra del Crystal, Mann ! 



