Class XXIV. CRYPTOGAMIA. 



Stamens and Pistils either imperfectly, 

 or not at all, known, or not to be 

 numbered with any precision. 



[ The Orders are all natural families, and all either monoco-^ 

 tyledonous or acotyledo7ious.'\ 



Order I. FILICES. Ferns. 



Frond with either dorsal, terminal, axillary, or radical 

 fructijication. 



* Capsules aggregate, on the back of a leafy frond, 

 bivalve, each bound with an elastic jointed ring, 

 contrary to the vahies. 



463. POLYPODIUM. Capsules in roundish scattered 



masses. Cover none. 



464. 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 jagged. 



471. WOODSIA. Caps, in roundish scattered masses. 

 Cover roundish, fixed by a central stalk under each 

 mass ; 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. Caj^s. in nearly linear, twin, 



scattered masses, between 2 parallel veins. Covers 2, 

 linear, opposite, folding over each other. 

 T 2 



