Tab. XXII. 



A. DiCKsoNiA ARBORKSCENS, L'Herit. — p. iiQ. 



Fig. 1 . Mucli reduced sketch of tlie entire plant. Fig. 2. Pin- 

 na ; nat. size. Fig. 3. Pinnule, seen from the upper side, 

 with sori ; magnified. Fig. 4. Sorus; more magnified. 



B. Dtcksonia Sellowiana, Hook. — p. 67. 



Fig. I. Two pinnules, sterile; nat. size. Fig. 2. Segment from 

 the same ; magnified. Fig. 3. Fertile pinna ; nat. size. 

 Fig. 4. Segment from the same, with sori ; magnified. 

 Fig. 5. Portion of the stipes ; nat. size. 



