trees; branches terete. Leaves opposite-decussate, margin entire; stipules
linear. Inflorescence of 4 to 9-flowered, peduncled cymes, flower sometimes
solitary. Calyx deeply 5-lobed, subtended by a cup-like involucre of
bracteoles, rarely 6-lobed. Petals 5-6, bilobed with a long seta in the sinus,
lobes multifid. Stamens numerous, on a disk, exserted, anthers 4-celled,
longitudinally dehiscent. Ovary inferior, 1-locular, ovules 6 per locule,
apical, styles filiform, stigmas 3-lobed. Fruits ovoid. Seed 1, germinating on
plant. Hypocotyls cylindrical, spindle-shaped or clavate, apex pointed.