174 59- OLACACEAE 



2. Filaments united into a lorg tube. Stamens 4—5, as many as and opposite 



the divisions of the corolla. Disc 4 — 5-lobed. Calyx enlarged in fruit. 



Flowers in racemes or panicles. [Tribe APTANDREAE.] ... 3 



Filaments free or nearly so. [Tribe OLACEAE.] 4 



3. Flowers 4-merous, unisexual. Ovules 2. Calyx cupular, not splitting 



at the time of maturity. — Species i. West Africa. Aptandra Miers 



Flowers 5-merous. Ovules 3. Calyx splitting into 3 segments at the 



time of maturity. — Species 2. Equatorial West Africa. They >äeld 



timber and oily seeds which are also used in medicine. Ongokea Pierre 



4. Ovules 2. Stamens 5 — 10. Calyx not enlarged in fruit. — • Species 6. West 



Africa. Ptychopetalum Benth. 



Ovules 3. Stamens 6—12, of which 3—6 are fertile. Calyx enlarged in 

 fruit. — Species 40. Tropics. Some species yield timber, (Plate 

 36.) Olax L. 



5. Stamens as many as and opposite the petals, 4^6, free or nearly so. [Tribe 



ANACOLOSEAE.] 6 



Stamens 2 — 4 times as many as the petals. Ovary superior, completely 

 or almost completely 3— 4-celled. Q 



6. Ovary superior, septate at the base, with 4 — <, ovules. Flowers 5-merous, 



in panicles. — Species i. Island of Mauritius. . Stolidia Baill. 



Ovary infeiior or half-inferior. Flowers in axillary spikes racemes or 



fascicles 7 



7. Flowers 6-merous. Catyx entire or toothed. Ovary very incompletely 



2-celled. Ovules 2. — Species i. Madagascar. Anacolosa Blume 



Flowers 4 — 5-merous. Ovary completely or almost completely 3 — 4-celled. 



Ovules 3 — 4 ^ 



8. Flowers 4-merous. Calyx shortly toothed. Ovary 4-celled. Fruit a 



drupe. — Species 2. Equatorial West Africa. Strombosiopsis Engl. 

 Flowers 5-merous. Calyx deeply divided. Ovary 3-celled. Fruit a berry. 

 — Species 7. Central Africa. (Including Lavalleopsis Van Tiegh.) 



Strombosia Blume 



9. Stamens 3—4 times as many as the petals, 12 — 20. Cah'x entire, not 



enlarged in fruit. Juice resinous. — Species i. Equatorial West 

 Africa. Yields timber and edible oily seeds. [Tribe COULEAE.] 



Coula Baill. 



Stamens twice as many as the petals, 8 — 12. Calyx 4 — 6-toothed. Juice 



not resinous. 10 



10. Anthers globose. Ovary incompletely 3-celled. Style short. Petals 

 5 -6. Calyx much enlarged in fruit. Leaves with milky juice. — 

 Species 3. West Africa. [Tribe HEISTERIEAE.] Heisteria Jaqu. 



Anthers linear. Ovary almost completely 3 — 4-celled. Style as long 

 as the ovary. Petals 4 — 5. Calyx not enlarged in fruit. Leaves with 

 watery juice. — Species 3. Tropical and South-East Africa. They 

 3ield fragrant wood, bark for tanning, edible fruits, and oily seeds, and 

 are also used in medicine. [Tribe XIMENIEAE.J Ximenia Plum. 



