Tau. XXTV. 



A. DicKSONiA coNiiFOLiA, Hook. — p. 70. 



Fig. 1. Portion of a sterile frond ; nat. size. Fig. 2. Portion 

 of fertile ditto ; ditto. Fig. 3. Pinnule ; magnified. 

 Fig. 4. Two sori ; more magnified. 



B. DicKsoNiA Martiana, Klotzsch. — p. 70. 



Fig. 1. Portion of a sterile frond ; nat. size. Fig. 2. Portion 

 of fertile ditto ; ditto. Fig. 3. Two segments with sori ; 

 magnified. 



C. DiCKSONiA DUBiA, Gaud. — p. 71. 



Fig. 1. Portion of a sterile frond; nat. size. Fig 2. Fertile 

 pinna ; ditto. Fig. 3. Upper ; and fig. 4, under side of 

 fertile segments; magnified. Fig. 5. Sorus; several of the 

 capsules having been removed ; more magnified. 



