but which in all my numerous specimens never appears on the 
sterile plant, or on the lower and sterile pinne. 
We cannot agree with M. Fée in the propriety of constituting 
a new genus of this Gymnogramme (“ Trismeria”’) still less in 
making two, or rather three, species dependent on the colour 
of the powdery secretion, which, as in other genera of Ferns with 
a similar secretion (see Cheilanthus argentea at tab. xcv., and 
observations thereupon, of ‘Exotic Ferns’), varies from almost a 
pure white to full yellow. 
Fig. 1. Very much diminished plant of Gymnogramme trifoliata. 2 and 3. 
Base and apex of a frond,—xat. size. 4. Portion of a fertile pinna,—magnified. 
