Mata small, whitish, covered with short hairs. Opposite leaves, with fascicles of leaves in their armpits, with petioles thick, stipulated , with scrambled margin towards the undersides . Flowers gathered in terminal inflorescences . 5 sepals , the 2 outer ones half the size of the 3 inner ones. 5 yellow petals . Numerous stamens . Pistil with a long style . Fruit in 3-4 mm capsule , clearly shorter than the calyx , ovoid-trigone or ellipsoidal, with hairy apex, with 3-6 seeds1.5 mm, ferrugineous. It blooms in spring and bears fruit in spring and summer