New Fern from Rota—WAGNER 
215 
FIG. 1. Lastrea Gretheri W. H. Wagner: a, habit of frond; b, details of pinnules; c, stipe-base scale showing 
distribution of hairs; d, hair from lamina; e, forms of glands; /, form of indusium with distribution of dark 
and light glands (these commonly much fewer, or some replaced by hairs). 
