Portion of barren Frond, under side. 



GYMNOGRAMMA TRIFOLIATA. 



Desvaux. J. Smith. Sprengel. Moore. 



PLATE XXXI. 



Acrostiehum trifoliatum, LlNN^us. 



Hemionitis trifoliata, Humboldt. 



Gymnogramma — Naked writing, in allusion to the son. 

 Trifoliata — Three-leaved. 



A BEAUTIFUL golden-powdercd Fern, rare in cultivation. 



Native of the West Indies and South America. 



Fronds pinnate, pinnse linear, from two to three inches in 

 length; sterile fronds everywhere very smooth; basal pinnse tri- 

 foliate, higher on the frond usually bifoliate, opposite or sub- 

 opposite; pinnse short-stalked. 



Stipes and rachis reddish. 



Veins forked. 



Sori along the veins, naked, and eventually confluent. 



