197 
India, western mountains, rare. It is pro- 
bably only a form of flexuosum. 
SUB-ORDER V.—MARATTIACE 
Sporangia opening by a slit down one side 
or a pore at the apex without a ring, usually 
joined together in concrete masses (synangia), 
vernation circinate. 
Genus LI.—AnciopTeris Horrmann. 
(Deriv. Angio, open; pteris, fern—the open 
sporangia.) 
Sporangia opening by a slit down the side, 
sessile, very close to one another but not 
concrete, arranged in linear oblong or boat- 
shaped sori near the edge of the frond; veins 
simple or forked, tree ; fronds very large, bipin- 
nate, often only pinnate. Stipes club-shaped 
at the base, and springing between two fleshy 
stipules. Pinne and pinnules articulate with 
the rachis. 
Angiopteris cvecta Hoffmann. 
A handsome gigantic fronded fern. Caudex 
short, about two feet high. Fronds 6—20 feet long, 
bipinnate, often only pinnate; rachis swollen 
at the base ; pinnules (or in the case of pinnate 
fronds, pinne) 4-12 inches long, 4-13 inch 
