86 Lxx. rubiacej: (hiern). [Didyandra. 



ovate, contorted dextrorsely (as seen from inside), persistent. Corolla 

 silky outside ; tube f annel-shaped ; throat glabrous or somewhat 

 hairy ; lobes 5, ovate or oblong-lanceolate, longer than the tube, imbri- 

 cated dextrorsely in bud. Stamens 5, inserted on the throat of the 

 corolla ; anthers sessile, linear- tapering, exserted, glabrous ; connective 

 mucronate ; cells introrse, divided into small compartments by longi- 

 tudinal and many transverse septa. Disk columnar, truncate. Ovary 

 2-celled ; style stout or filiform, tomentose or glabrous, with 2 spread- 

 ing or erect linear or subulate branches ; ovules numerous, inserted in 

 many rows on the placentas. Berry subglobose, fleshy, 2-celled', many- 

 seeded. Seeds not very small, somewhat compressed and obtusely 

 angular ; testa dark, shining ; albumen horny, oily, &c. — Trees or 

 shrubs with opposite petiolate glossy, submembranous leaves, wide 

 rounded or acuminate or cuspidate persistent stipules, and rather large 

 flowers in terminal cymes which often terminate short axillary branches. 

 An endemic genus. 



Cymes pedunculate. Flower 1|-1^ in. long. Calyx-lobes 



broadly ovate. Style exserted, tomentose 1. 2>. arborescens. 



Cymes sessile. Flowers 3- 4 in. long. Calyx-lobes ovate or 



lanceolate. Style included, glabrous 2. D. involucrata. 



1. D. arborescens, Welw. mss. ex Benth. et HooJc.f. Gen. PI. ii. p. 

 85. An arborescent or stout shrub, 8-25 ft. high, nearly glabrous. 

 Branches opposite, spreading, elongated, leafy, obtusely and unequally 

 4-sided or nearly terete below. Leaves oval, shortly acuminate, wedge- 

 shaped at the base, firmly chartaceous, 5-10 by 2-4! in., dark green on 

 both sides, persistent ; lateral veins about 7-9 on each side of the mid- 

 rib, slender ; petiole ^1 in. ; stipules ovate, apiculate, ;|— ^ in. long, cili- 

 olate, erect. Flowers yellow -greenish, 1^1^ in. long, coriaceously 

 rigid, sessile or shortly pedicellate, in trichotomous corymbose cymes. 

 Calyx herbaceous, ^— | in. long ; tube shortly pubescent ; lobes broadly 

 ovate, ciliolate or glabrate, longer than the tube. Corolla silvery out- 

 side ; lobes acute or apiculate, •§— f in. long. Anthers nearly -^ in. long. 

 Style exserted, tomentose-pubescent. Berry § in. diam. or more. 

 Seeds quite black, glistening. 



ITpper Guinea. Old Calabar, Rev. W. C. Thomson ! 



Xiower Guinea. Angola, Golungo Alto, 2500-2800 ft. alt., in wooded slopes 

 of Serra de Alto Queta, Welwitsch ! 



2. D. involucrata, Hiern. A nearly glabrous shrub, 15-2 Oft. high ; 

 branchlets obtusely quadrangalar. Leaves elliptic-obovate, acutely 

 acuminate, wedge-shaped at the base, 4-10 by 2-5 in. ; margins flat ; 

 lateral veins 9-12 on each side of the midrib ; petiole ^1 in. ; stipules 

 rotund, reflexed, concave, ^— | in. diam. Flowers 3-4 in. long, on short 

 pedicels little narrower than the calyx, clustered in sessile cymes 

 terminal and terminating short axillary branches ; bracteoles oblong 

 or linear, fugacious. Calyx ^-^ in. long, puberulous, obscurely ribbed ; 

 lobes lanceolate, subfoliaceous, ^-^ in. long, subacute. Corolla- lobes 

 ovate or lanceolate, subobtuse, §—1 in. long. Anthers half exserted. 

 Style glabrous, half as long as the corolla-tube. — Leptactina involucrata, 

 Hook. f. Ic. PI. sub. t. 1092. 



Upper Guinea. Ambas Bay, 1° N. lat. Mann! 



