>HIppeastrum calyptratum is usually considered to be epiphytic. I have pix of Clivia miniata as a epiphyte in trees. I think Worsleya might be considered a lithophyte since it grows on (nearly) bare rocks. At least one other Clivia is lithophytic. The 'New' Swamp Clivia. I forget the species name. Best Jim W. -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +