219. RUBIACEAE 519 



^4. Inflorescences fascicle-like or reduced to a single flower, surrounded by an 

 involucre of two bracts united at th6 base. Calyx truncate or shortly 



toothed. Corolla hairy at the throat 25 



Inflorescences without an involucre '26 



25. Style deeply 4 — 5-cleft. Flowers in 6 — 12-flowered fascicles or heads. 



Trees. — Species i. Island of Rodrigues. . Scyphochlamys Baif. Iij. 



Style simple, with a capitate stigma. — Species 10. Mascarene Islands 



and Madagascar. They yield timber Pyrostria Comm. 



26. Corolla curved, tubular. Calyx-segments 5, narrow. Anthers sessile. 



Ovary 5-celled. Stigma 5-lobed. — Species 6. Central Africa to 



Delagoa Bay Ancylanthus Desf. 



Corolla straight. Stigma entire or 2-lobed . . . 27 



27. Ovary 2-celled. Flowers small. Calyx truncate or shortly toothed. . 28 

 Ovary 3 — 6-celled 29 



28. Stigma peltate, 2-toothed or 2-cleft. Corolla white, hairy at the throat. 



Shrubs. Leaves stiff-leathery. Stipules united at the base. Flowers 

 in clusters. — Species ro. Central Africa and Seychelles. Some 



species yield dye-stuffs Craterispermum Benth. 



Stigma capitate, entire. — Species 120. Tropical and South Africa. 

 Some of them have edible fruits and are used in medicine. {Canthium 

 Lam.) Plectronia I 



29. Flowers large, in many-flowered panicles, polygamous. Calyx deeply 



divided, exceeding the corolla. Anthers exserted. Ovules with a 

 broadened funicle. Stigma hemispherical or mushroom-shaped. — 

 Species 10. Central Africa to Delagoa Bay. . . . Cuviera DC. 

 Flowers small. Stigma capitate, cylindrical, or truncate. — Species 70. 

 Tropical and South Africa. Some have edible fruits or are used in 

 medicine Vangueria Juss. 



30. (2.) Ovules inserted on the partitions of the ovary, but sometimes near 



their base 31 



Ovules inserted at the base of the ovary-cells. Corolla with valvate 

 aestivation. Stipules unlike the leaves. , 54 



31. Corolla with contorted aestivation. Fruit succulent. Shrubs or trees. 



Stipules small. Flowers solitary or in cymes. [Tribe IXOREAE.] 32 

 Corolla with valvate aestivation 38 



32. Ovules attached to placentas arising near the base of the partition of the 



ovary. Ovary 2-celled. Stigma spindle-shaped. Corolla glabrous 

 at the throat. Flowers 5-merous, in head-like cymes. Seeds with 

 ruminated albumen. Climbing shrubs. — Species 20. Tropics. 



Rutidea DC. 

 Ovules attached to placentas arising near the middle of the partition. 33 



33. Corolla with a curved tube, 5 — 7-lobed. Calyx-teeth indistinct. Anthers 



included. Ovary 2-celled. Style with two unequal stigmas. Flowers 



