SUBORDER THEINEAE
[FAMILY 146.] DILLENIACEAE
Shrubs or trees. Leaves undivided. 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; embryo 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. alnifolia L., water-tree) secretes much watery juice when cut across. (Plate 96.)
[Tribe TETRACERAE.] Tetracera L.
Filaments not conspicuously broadened. Anther-halves long, parallel. 2
2. Stamens crowded at one side of the flower. Anthers opening by longitudinal slits. Carpels 2, free. Ovules 1-3. 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 neighbouring islands. They yield timber. (Wormia Blume) Dillenia L.
SCYTOPETALACEAE.
FLOW. PL. AFR.
Pl. 95.
J. Fleischmann del.
Rhaptopetalum sessilifolium Engl.