Tetraena
Diagnostic description:
Shrubs. Young branches and leaves with T-shaped trichomes. Stipules dry membranous. Leaves opposite or fascicled. Flowers axillary, solitary. Sepals 4. Petals 4. Stamens 8, in 2 whorls; filaments with white membranous appendages at base. Ovary 4-carpellate; stigma persistent. Fruit 4-valved. Seeds without endosperm.