A species from northeastern Peru with large white flowers, light green in the center and nicely fragrant. Foliage is glossy, deep green and petiolate. An easy species to grow, blooming often twice each year summer and winter.

A small species with twisted foliage and fragrant light blue flowers. Native of Bolivia and Argentina where it grows in small clusters in the arid scrublands. The leaves are silvery, terete and somewhat kinked. Its inflorescence is like that of a streptocarpa, with light blue fragrant flowers. Grow bright and airy for best results.

From Argentina, grows as a saxicole on exposed rock or epiphytically in scrubby thorn bush, almost always forming large clusters. This caulescent species has a rigid stem and short, stiff leaves, all a dark grayish color, and bears large and very fragrant, white flowers.

A notably easy species to cultivate, tolerating a variety of conditions and light levels. Prefers to be kept bright, airy and on the dry side