524 219- RUBIACEAE 



Flowers in terminal and lateral cymes, 5 — 7-merous. Corolla with a rather 

 short tube and erect lobes, hairy at the throat. Anthers scarcely 

 exserted. Style-apex thickened, 2 — 3-lobed. Fruit a berry. Leaves 

 linear. — Species i. Canary Islands Plocama Ait. 



68. Ovary superior. Style 2-cleft at the apex. Stamens 5, inserted on the 



corolla-tube. Anthers included. Shrubs or trees. Flowers in terminal 

 panicles or heads. — Species 25. Tropics. Some yield timber or are 



used in medicine Gaertnera Lam. 



Ovary interior 69 



69. Flowers axillary, solitary or in usually few-flowered cymes or heads. Shrubs 



or small trees 7a 



Flowers in terminal or terminal and lateral, many-flowered inflorescences, 

 hermaphrodite 74 



70. Ovary-cells and style-branches or stigmas 2 71 



Ovary-cells and style-branches or stigmas 4 — 12 73 



71. Anthers exserted. Calyx 5-partite. Corolla hairy within above the base,. 



glabrous at the throat. Seeds with ruminated albumen. Flowers in 

 heads surrounded by an involucre. — Species i. Equatorial West 

 Africa (Gaboon) Peripeplus Pierre 



Anthers included. Calyx 4-partite or nearly entire. Flowers solitary or 



in glomerules 72 



'J2. Calyx with 4 segments alternating with small teeth. Corolla funnel- 

 shaped. Anthers with a short appendage at the apex. Flowers solitary, 

 — Species 2. Madagascar Hymenocnemis Hook.fil. 



Calyx nearly entire. Corolla bell-shaped. Anthers unappendaged. Fruit 

 with a single stone. Flowers in clusters. — Species 3. Madagascar. 



Saldinia A. Rich. 



73. Leaves at first decussate, subsequently spreading in one plane, with many 



thin transverse veins. Stamens inserted at the throat or on the limb 



of the corolla. — Species 15. Tropics Lasianthus Jack. 



Leaves always decussate, without conspicuous tranverse veins. Stamens 

 inserted in the tube of the corolla. Flowers hermaphrodite. — Species 

 7. Madagascar and neighbouring islands. Used medicinally. 



Psathura Comm. 



74. Inflorescences capitate, surrounded by an involucre. Ovary-cells and 



style-branches 2 — 4 75 



Inflorescences without an involucre 'j'j 



75. Corolla with a curved tube, 6-lobed, white. Calyx irregularly lobed. 



Ovary-cells and style-branches 3. Shrubs. — Species i. East Africa. 



Megalopus K. Schum. 

 Corolla with a straight tube 76 



76. Seeds grooved on the ventral face. — Species 18. Central Africa. (Under 



Uragoga L.) Cephaelis Swart z 



Seeds flat on the ventral face. Creeping herbs. Leaves long-stalked, 

 heart- or kidney-shaped. — Species 13. Tropics. . . . Geophila Don 



