Root with many branches. Shoot perpendicular or raising itself in a curve. Shoot becomes woody at the base. Size is 20 to 70 cm. Shoot is naked at the base and carries gland hairs further upwards.
Leaves pairwise opposite.
Their form is elongated, pointed, smooth rimmed with short stem and nude. Flowers are sitting on a very short stem. Inflorescence at the end of the shoot. Flowers point in all directions. Bracts for are much shorter than the flowers.