KEY TO THE GENERA

1Flowers in terminal or cauliflorous, pendulous inflorescences. Leaf blades without glands along the margin. Calyx lobes valvate. Fruits hairy (when young)
1'Flowers in axillary fascicles to shortly peduncled after several flowering periods. Leaf blade margins with glandular teeth or crenations. Calyx lobes imbricate. Fruits glabrous