dioecious herbs. Stems elongated, slender, much branched. Leaves alternate but
usually opposite basally, densely crowded above, linear, slightly sheathing at
base, margin minutely serrulate with teeth. Male inflorescences many flowered,
pedunculate, spathe bifid at apex. Male flowers: minute; sepals 3, petaloid,
white, ovate; petals 3, small, subequal to sepals; stamens 2 or 3, opposite to
sepals, filaments slender, very short. Female spathe oblong, 1-flowered, female
flowers similar to male ones, ovary oblong, beaked, styles 3. Fruits
ovoid-oblong or linear. Seeds oblong, numerous.