Marantaceae or arrowroot family, is a large family with about 30 genera and some 400 species. It is distributed in subtropical and tropical regions world-wide. Plants are rhizomatous, with rhizomes often containing starch. Plants can either grow in the ground or as epiphytes. A species of the genus Maranta is grown in tropical areas for their starchy rhizomes. Calathea and Stromanthe are grown as ornamentals, often times with very nicely variegated leaves.