Class XXIV. CRYPTOGAMIA. 



Stamens and Pistils either imperfectly, 

 or not at all, known, or not to he 

 numbered with any precision, 



{The Orders are all natural families, and all either monoco- 

 tyledonous or acotyledonous.~\ 



Order I. FILICES. Ferns. 



Frond with either dorsal, terminal, axillary, or radical 

 fructijication. 



*' Capsules aggregate, on the back of a leaf y frond, 

 bivalve, each bound xvith an elastic jointed rim^^ 

 contrary to the valves. 



^63. POLYPODIUM. Capsules in roundish scattered 

 masses. Cover none. 



4-64-. ASPIDIUM. Caps, in roundish scattered masses. 

 Cover nearly orbicular, fixed by the centre, sepa- 

 rating all round. 



465. CYSTEA. Caps, in roundish scattered masses. Cover 

 orbicular, concave, fixed by a lateral point under- 

 neath, finally reflexed and jaggotl. 



47 1. \\'OODSIA. Caps, in roundish scattered masses. 

 Cover roundish, iixed by a central stalk under each 

 mass ; the margin in numerous, deep, capillary, in- 

 curved segments. 



46G. ASPLENIUM. Caps, in linear, scattered masses. 

 Cover linear, separating at the side towards a mid- 

 rib or vein. 



4G7. 8COLOPEXDRIUM. Caps, in nearly linear, twin, 

 scattered masses, between 2 parallel veins. Covers 2, 

 linear, opposite, folding over each other. 

 T 'J 



