141. TILIACEAE 349 



Flowers hermaphrodite. Calyx 5 — 6-cleft. Ovules 2 in each ovar\'-cell. 

 Stigmas twisted, almost entire. — Species i. Madagascar. 



Speirostyla Bak. 



4. Petals with a gkmd at the base, rarely {Grcvia) petals wanting. Receptacle 



nearly always prolonged into a more or less stalk-like androphore. 



Anthers roundish. [Tribe GREWIEAE.] 5 



Petals without a gland at the base. Receptacle not stalk-like, rarely 

 {CorcJwrus) somewhat prolonged. Anthers linear or oblong, rarely 

 [Sparmannia) oval 1 1 



5. Flowers dioecious or polygamous. Stamens 10. Ovary 3 — 5-celled, with 



numerous ovules in each cell. Leaves elliptical. Inflorescence raceme- 

 like. — Species i. West Africa (Congo). Pentadiplandra Baill. 

 Flowers hermaphrodite. Stamens numerous, rarely {Triumfetta) 5 — 10, 

 but then ovary-cells with 2 ovules in each 6 



6. Fruit a spiny nut or schizocarp. Herbs or undershrubs, rarely shrubs. 



Flowers in cymes, yellow. Stigma lobed. Ovules 2 in each ovary- 

 cell. — Species 50. Tropical and South Africa. Some species yield 



fibres, vegetables, or medicaments Triumfetta L. 



Fruit an unarmed nut or drupe. Shrubs or trees 7 



7. Fruit few-seeded, usuall}^ fleshy. Ovary 2 — 5-celled, with usually 2 



ovules in each cell. Filaments free. — Species 140. Tropical and 

 South Africa and the Sahara. They yield timber, fibre, edible fruits 

 from which drinks are prepared, and medicaments. (PlateQi.) GrewiaL. 

 Fruit many-seeded, fibrous. Ovary 4 — lo-celled, with numerous ovules 

 in each cell. Petals 4 — 5, small. Trees 8 



8. Flowers 2 — 3 together surrounded by an involucre of 3 — 4 bracts. Fila- 



ments free. Ovary 6 — 8-celled 9 



Flowers without a distinct involucre. Filaments united at the base. 

 Stipules cleft 10 



9. Involucral bracts 3, enclosing 3 flowers. Ovary 8-celled. Fruit with 8 



furrows. Stipules awl-shaped. — Species i. West Africa. The 



seeds are used as a substitute for coffee Duboscia Bocq. 



Involucral bracts 4, enclosing 2 flowers. Petals 4. Ovary 6 — 7-celled. 

 Fruit with 6 — 7 ribs. Stipules large, oblique. — Species i. West 

 Africa (Cameroons) Diplanthemiim K. Schum. 



10. Ovary and fruit 4 — 5-celled. Fruit oblong. Seeds winged. — Species i. 



West Africa Desplatzia Bocq. 



Ovary and fruit 8 — lo-celled. Fruit ovoid or globose. — Species 3. Equa- 

 torial West Africa. Used medicinally. {Greiviopsis De Wild. & Dur.) 



Grewiella O. Ktze. 



11. (4.) Anthers hnear, surmounted by a two-tipped or scale-like appendage. 



Stamens numerous. Ovary 6 — lo-celled. with 3 or more ovules in 



each cell. Shrubs or trees. [Tribe APEIBEAE.j 12 



Anthers without an appendage at the top, rarely surmounted by a short 

 point. Ovary 2— 5-celled, rarely 6-celled. [Tribe TILIEAE.] . . 13 



