Platycerium sporophytes (adult plants) have tufted roots growing from a short rhizome that bears two types of fronds, basal and fertile fronds. Basal fronds are sterile, shield or kidney shaped and laminate against the tree and protect the fern`s roots from damage and desiccation. In some Platycerium species the top margin of these fronds forms a.... Found on http://en.wikipedia.org/wiki/Platycerium