The Black Mystic Earths Star (Cryptanthus) is an easy to grow house plant forming rosettes of leaves. The leaves are succulent, with wavy margins and teeth; they are strongly banded in silver and black. The white flowers appear nested in the center in this plant. Cryptanthus tolerate a temperature range from 40 degrees F to over 100 degrees F. Optimum growth occurs between 60-85 degrees F. Keep the medium evenly moist at all times, but not wet or dry. A sunny location is prefered. New plants (pu ...