A conspectus of the native and naturalized species of Nephrolepis (Nephrolepidaceae) in the world Author Hovenkamp PH Author Miyamoto F text Blumea 2005 50 279 322 http://www.ingentaconnect.com/content/nhn/blumea/2005/00000050/00000002/art00004 journal article HovenkampMiyamoto2005 Nephrolepis exaltata Most of the Nephrolepis cultivars currently in cultivation derive from Nephrolepis cv. 'bostoniensis' , which is conventionally associated with N. exaltata ( Benedict, 1916a ). An overview of the most frequently cultivated forms is given by Hoshizaki & Moran (2001) . Morton (1958) suggested that 'bostoniensis' was possibly a hybrid with N. exaltata as one parent. Its constant sterility, morphological instability and vegetative vigour indicate a hybrid origin, but there is no reason to assume that N. exaltata is involved as parent, when we consider that N. x hippocrepicis , which originated well outside the distribution area of N. exaltata , exactly mimics the morphology of N. exaltata , and another such hybrid may equally well have given rise to 'bostoniensis' .