Class XXIV. CRYPTOGAMIA. 



Stamens and Pistils either imperfectly, 

 or not at all, known, or not to be 

 numbered with any precision, 



[The Ordas are all natural families^ and all cither monoco- 

 tifledonoiis or acotjjlcdonom.] 



Order I. FILICES. Ferns, 



Frond with eithei' dorsal, terminal, axillary, or radical 

 fructification. 



* Capsules aggregate^ on the hack of a leafy frond, 

 bivalve., cacJi bound xoith an clastic jointed ring, 

 contrary to the valves. 



463. POLYPODIUM. Capstdes in roundish scattered 

 masses. Cover none. 



464-. ASPIDIUM. Caps, in roundish scattered masses. 

 Cover nearly orbicular, fixed by die centre, sepa- 

 ratins: all round. 



465. CYSTEA. Cap)S. in roundish scattered masses. Cover 



orbicular, concave, fixed by a lateral point under- 

 neath, finally reflexed and jagged. 



471. WOODSIA. Caps, in roundish scattered masses. 

 Cover roundish, fixed by a central stalk under each 

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

 curved segments. 



466. ASPLENIUM. Caps, in linear, scattered masses. 



Cover linear, separating at the side towards a mid- 

 rib or vein. 



467. SCOLOPENDRIUM. Caps, in nearly linear, twin, 



scattered masses, between 2 parallel veins. Covers 2, 

 linear, opposite, folding over each other. 



