35^ 145- äCVTÜI'ETALACEAE — I4O. DILLENIACEAE 



separating into 2 — 5 petals. Seeds usually with a crown of hairs. 

 Flowers in fascicles or cymes, usually on the old wood. [Tribe RHAP- 

 TOPETALEAE.i. ."...." 3 



2. Flowers in racemes. Stigma usually lobed. Fruit a drupe. Albumen 



ruminate. — Species 9. West Africa Scytopetalum Pierre 



Flowers in panicles. Stigma entire. Fruit a capsule. Albumen uniform. 

 — Species 10. West Africa. (Including Egassea Pierre) 



Oubanguia Baill. 



3. Ovary almost superior to half-superior. Fruit a one-seeded drupe. Albu- 



men ruminate. — Species 5. West Africa. (Plate 95.) 



Rhaptopetalum Oliv. 

 Ovar}- superior. Fruit a several-seeded capsule. Albumen uniform. . 4 



4. Fruit long, with 2 fertile and 2 sterile cells. — Species 2. Equatorial 



\\'est Africa (Cameroons) Pierrina Engl. 



Fruit short, with 4 — 6 fertile cells. — Species 15. West Africa. (Including 

 Erythropyxis Pierre) Brazzeia Baill. 



ORDER PARIETALES 



SUBORDER TI-IEINEAE 



FAMILY 146. DILLENIACEAE 



Shrubs or trees. Leaves imdivided. Sepals imbricate in bud, persistent in 

 fruit. Petals imbricate in bud. Stamens numerous, hypogynous. Anthers 

 adnate. Carpels 2 or more, free or united at the base of the ovarial portion. 

 Ovules erect, ascending or horizontal, inverted, with a ventral raphe. Fruit 

 dry. Seeds with an aril ; albumen abundant ; embr3'0 minute, straight. — 

 Genera 3, species 25. Tropics. (Plate 96.) 



1. Filaments much broadened at the top. Anther-halves short, diverging 



below, opening lengthwise. Aril laciniate. Leaves hispid, penninerved 

 with parallel side-nerves, exstipulate. Flowers in panicles. — Species 

 20. Tropics. The stem of several species (especially T. aim folia L., 

 water-tree) secretes much watery juice when cut across. (Plate 96.) 



[Tribe TFTRACERAE.] Tetracera L. 



Filaments not conspicuously broadened. Anther-halves long, parallel. 2 



2. Stamens crowded at one side of the flower. Anthers opening by long- 



itudinal shts. Carpels 2, free. Ovules i — 3. Leaves opposite, oblong, 

 one-nerved or faintly net-veined. Flowers in racemes. — Species 2. 



Madagascar Hibbertia Andrz. 



Stamens equally distributed all round. Anthers opening by apical pores 

 sometimes prolonged downwards into slits. Carpels 5 or more, united 

 at the base. Ovules numerous. Leaves penninerved, with parallel 

 side-nerves, usually stipulate. — Species 3. Madagascar and neighbour- 

 ing islands. They yield timber. {Wormia Blume) . . Dlllenia L. 



