Black Mystic Earth Star Plant - Cryptanthus - Easy - 4" Pot 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 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. The plant you receive is growing in a 4" pot.