334 132- ICACINACEAE 



Trees or erect, rarely climbing shrubs ; in the latter case leaves alternate 

 or flowers in spikes. [Tribe ICACINEAE.] 8 



8. Flowers unisexual, dioecious. Calyx 5-partite. Petals minute and free, 



or wanting. Anthers turned outwards. Ovary with a ring-shaped 

 appendage at the top. Trees. Leaves alternate. Flowers in panicles. 

 — Species 2. Madagascar and neighbouring islands. GrisoUea Baill. 

 Flowers hermaphrodite or polygamous. Perianth consisting of a calyx 

 and a corolla 9 



9. Petals free. Sepals usually united high up 10 



Petals more or less unired. Sepals usually united at the base only. . . 14 



10. Embryo nearly as long as the albumen 11 



Embryo much shorter than the albumen 12 



11. Petals bearded within. Disc present. Style long ; stigma small or shield- 



shaped. Fruit with a crusty endocarp. Embryo with flat cotyledons. 

 Shrubs with ascending or somewhat twining branches. — Species 7. 



Tropics. Some have edible fruits or seeds Icacina Juss. 



Petals not bearded within. Disc absent. Fruit with a woody endocarp 

 and a fleshy mesocarp. Embryo with folded cot3'ledons. Climbing 

 shrubs. — Species 2. Equatorial West Africa. The fruits and seeds are 

 eaten and used medicinally Lavigeria Pierre 



12. Stem climbing. Flowers in spikes. Petals hairy outside. Disc present. 



Ovary without swellings. Style terminal ; stigma slightly lobed. — 



Species 6. Tropics. Desmostachys Planch. & Miers 



Stem erect, tree-like. Flowers in fascicles or panicles. Ovary with 2 

 swellings. Style lateral 13 



13. Flowers in axillary fascicles. Filaments broadened below. Ovary usually 



with two narrow swellings at the top. — Species 12. Central Africa. 



(Under Apodvles Mey.) Rhaphiostyles Planch. 



Flowers in terminal panicles. Filaments awl-shaped. Ovary with two 

 broad swellings on the ventral face. — Species 10. Tropical and South 

 Africa. Several species yield timber or edible fruits. (Plate 84.) 



Apodytes E. Mey. 



14. Petals united at the base or nearly to the middle 15 



Petals united beyond the middle 16 



15. Petals imbricate in the bud. Style short. Leaves opposite. Flowers in 



repeatedly forked cj'mes. — Species 4. South Africa and Madagascar. 



Cassinopsis Sond. 

 Petals valvate in the bud. Style long. Leaves alternate. Flowers in 

 few-flowered fascicles or panicles. — Species 9. Central Africa. (In- 

 cluding Alsodciidiiim Engl.) Alsodeiopsis Oliv. 



iG. Petals imbricate in the bud. , Sepals and stamens unequal. Disc in- 

 distinct. Stigma sessile. Leaves opposite, elhptical. Flowers in 



panicles. — Species i. Madagascar Tridianisia Baill. 



Petals valvate in the bud 17 



