244 ^^4- CONN'ARACEAE 



4. Calyx scarcely or not enlarged in fruit, small, usually flaccid ... 5 

 Calyx conspicuously enlarged and hardened in fruit, leathery to woody 



Stamens 10. Carpels 5 6 



5. Leavob trifoliolate. — Species 25. Tropics. Some are used medicinally. 



Agelaea Sol. 

 Leaves pinnate, with several pairs of leaflets. Stamens 10. Carpels 5. 

 Styles 2-cleft at the apex. Calyx persistent. — Species 7. Tropics. 

 Some are poisonous. (Under Roicen Aubl.) 



Byrsocarpus Schum. & Thonn. 



6. Calyx tightly clasping the fruit, herbaceous at the time of flowering. Styles 



short ; stigmas capitate. Seeds with very convex cotyledons. — 

 Species 40. Tropics. Some are poisonous or used in medicine. 



Rourea Aubl. 

 Calyx not clasping the fruit. Stamens very unequal. Styles long . 7 



7. Stem twining. Inflorescence paniculate. Calyx leather}^ at the time 



of flowering. Seeds with flat cotjdedons. — Species 2. Equatorial 



West Africa Paxia Gilg 



Stem erect. Inflorescence racemose-fasciculate. Anther-halves distant 

 from one another, the pollen -sacs placed crosswise. — Species t. Equa- 

 torial West Africa. {Jawidea Gilg) Yaundea Gilg 



8. (i.) Ripe carpel indehiscent, not stalked, with a crusty pericarp. Seeds 



enveloped by a thin aril. Carpel i. Stamens 5 — 7, alternating with as 

 many glands. Calyx deeply divided, persistent, but not enlarged in 

 fruit. Low trees. Leaves unifoliolate. Flowers in clusters. — Species 2. 



West Africa Hemandradenia Stapf 



Ripe carpel (or carpels) dehiscing lengthwise 9 



9. Receptacle prolonged into a stalk-like androphore. Sepals red, free. Petals 



yellow, clawed, with 2 glands above the claw. Styles long. Erect 



shrubs. — Species I. Northern West Africa (Liberia). Öinklagea Gilg 



Receptacle not prolonged. Petals without glands. Mostly climbing 



shrubs 10 



10. Sepals imited to the middle, ovate-triangular. Petals linear, four times 



as long as the calyx, rolled inwards at the tip. Stamens very unequal. 



Styles long ; stigmas lobed. — Species 6. West Africa. Spiropetalum Gilg 



Sepals free or nearly so. Petals not more than twice as long as the calyx. 



Styles short ; stigmas capitate 11 



11. Fruit-carpels glabrous on the inside, short-haired on the outside, pro- 



longed into a stalk at the base. Seeds without a distinct aril, but with 

 a fleshy testa. Embryo long and narrow. Petals longer than the 



calyx. — Species 10. West Africa Manotes Sol. 



Fruit-carpels covered with long stiff hairs on the inside and usually also 

 on the outside. Seeds with a very small adnate aril at the base. Petals 

 as long as or shorter or somewhat longer than the calyx. Stamens 

 subequal. — Species 30. Tropical and South Africa. vSome are used 

 medicinally Cnestis Juss. 



