Beautiful succulent made up of a nice globose caudex, with a woody look and rather small; from its apex emerge annual herbaceous stems that do not exceed the 10 cm of height, but are enriched by curved and simple leaves ( from which comes the name of the species), lanceolate, narrow and pointed. In full summer the dark green of the foliage contrasts pleasantly with the candid flowers, rather small and delicate, which at night emit unmistakable fragrances similar to cinnamon and have the peculiarity, compared to other species, of opening one at a time.