2IQ. RUBIACEAK 531 



Piacentas adnate to the partition of the ovary throughout thinr wliole 

 length or almost so 141 



138. Flowers unisexual or polygamous, 5-merous. Corolla-lobes unappcndaged. 



Fruit globose. Shrubs. — Species 20. Madagascar and neiglibouring 

 islands. Some species yield dyes or medicaments ; several are poisonous. 



Danais Comm. 

 Flowers hermaphrodite. Corolla-lobes usuall}^ with a thread- or club- 

 shaped appendage on the back. Fruit oblong or linear. Trees. . 139 



139. Anthers concealed within the corolla-tube. Flowers 4-merous. Corolla 



urn-shaped. Fruit loculicidal. Leaves opposite. — Species i. West 



Africa. Used medicinally Pseudocinchona A. Chev. 



Anthers projecting at least partly beyond the corolla-tube. Corolla-lobes 

 appendaged. Flowers usually 5-merous 140 



140. Fruit loculicidal. Corolla usually funnel-shaped. — Species 3. West 

 'tr. Africa Corynanthe Welw. 



Fruit septicidal. Corolla urn- or bell-shaped. Leaves whorled. — 

 Species 3. West Africa. They yield timber and medicaments. (Under 

 Corynanthe Welw.) Pausinystalia Pierre 



141. Fruit loculicidal. Calyx-segments subulate, deciduous. Corolla-lobes 



erect. Style shortly lobed. Trees. Leaves herbaceous. Stipules 

 glandular-toothed. Bracts partly petal-hke. — Species 8. Tropics. 



Hymenodictyon Wall. 

 Fruit septicidal 142 



142. Fruit splitting downwards from the apex. Calyx-segments lanceolate, 



leaf-like, deciduous. Corolla violet. — Species 4. Madagascar. 



Schismatoclada Bak. 

 Fruit splitting upwards from the base. Calyx-segments persistent. Corolla 

 pink or yelloviäsh. Stamens of the long-styled flowers inserted in the 

 middle of the corolla-tube, those of the short-styled at its mouth. Placen- 

 tas thick. — Species 3. Cultivated in the tropics. They yield medica- 

 ments (especially quinine) Cinchona L. 



143- (133-) Ovary 5-celled. Stigmas 5. Stamens 5, inserted a little above 

 the base of the corolla-tube. Corolla salver-shaped, with a long tube. 

 Calyx-segments unequaJ. Flowers in panicles. Herbs. — Species i. 



Southern West Africa (Angola) Pentacarpaea Hiern 



Ovary 2-celled. Stigmas i — 2 ^44 



144. Placentas club-shaped, ascending from the base of the ovary-cells, few- 



ovuled. Shrubs or undershrubs. Flowers in terminal cymes, 4- 



merous -^45 



Placentas attached to the partition of the ovary I47 



145. Calyx-segments distinctly unequal, one or several of them considerably 



enlarged. Corolla tubular or funnel-shaped. Stamens inserted in the 



corolla-tube. Fruit bursting irregularly. Stipules lacerated. — Species 



15. Tropics. (Under Carphalea Juss.) . . . Dirichletia Klotzsch 



Calyx-segments equal. ^4° 



