EXPLANATION OF THE PLATES. 





Ocitcra of Filice. 



TAB: IX. 



POLYPODIUM. Plant; piece of the frond (1) ; a magnified sporangium with Its stalk, 

 and another bursting and discharging spores, of P. vulgare, L. 



BTKUTIIIOPTERIS. Pinna of the sterile frond (1) of 8. Germanlca, Wittd.; portion of a 

 fertile frond (2) ; a piece of one pinna cut off to show the manner in which It Is rolled 

 up (8) ; and a portion of the last, magnified, with one side unrolled (4) ; towards the 

 base the sporangia all removed, to show how the fruit-dots are borne each on the 

 middle of a vein. 



ALLOSOEUS. Sterile and fertile plants of A. gracills, Presl.; and a portion of the fertile 

 frond (1) enlarged, with a piece of the marginal Indusium turned back to display 

 the fruit ; the sporangia are all removed from the fruit-bearing tips of the two forks 

 of the lower veto. 



TAB. X. 



PTERIS. A pinnule of P. aquilina, L., var. caudata; and a piece of one of the lobes, 



enlarged (2), the marginal indusium rolled back on one side, displaying the fruit; 



the sporangia all removed from the lower part to show the receptacle that bears 



them, viz. a cross line connecting the tips of the veins. 

 ADI ANTUM. Piece of the frond of A. pedatum. L. (1); a pinnule somewhat enlarged (2) ; 



and a piece of one (8) more enlarged, with the Indusium of one fruit-dot turned back 



to show the attachment of the fruit. 



OHEIL ANTHES. Small plant of 0. vestita (1) ; and a frult-bearlrig pinnule, enlarged (2) 

 WOODWARDIA. Portion of the sterile (i) ana of the fertile frond (2) of "W. angustl- 



folia ; a piece of the latter enlarged (8) ; piece of the frond of "W. Virginica (4) ; and 



part of a fruiting lobe (5), enlarged. 



TAB. XL 



CAMPTOSORUS. Plant of C. rhlzophyllus, Link.; and a portion of a frond, with fruit- 

 dots, enlarged (1). 



BCOLOPENDEICM. Tip of a fertile frond of S. offlcinarum; and (2) a piece enlarged, 

 with two fruit-dots. 



A.SPLENITJM. A pinna of A. tbelypteroides, Michx. (1) ; and part of a lobe (2) In fruit, 

 enlarged. 





