AN ENUMERATION OP CULTIVATED FERNS. 



153. DANJ3A, 8m. 



269 



Vernation uniserial, contiguous, decumbent; sarmentum 

 thick, fleshy; each frond rising from between two short 

 stipulseform appendages, and having the stipes once or more 

 times articulated. Fronds pinnate, rarely simple, 1-3 feet high, 

 the fertile usually somewhat contracted ; pinnae opposite, linear- 

 lanceolate, articulated with the rachis. Veins forked ; venules 



Genus 153. Barren and fertile frond, natural size j synangiutn enlarged. 

 No. 1. 



parallel, their apices arcuate and anastomosing at the margin. 

 Synangia sessile, immersed, linear, contiguous, occupying nearly 

 the whole length of the venules, and covering the whole under 

 surface of the fertile fronds ; each consisting of two rows of 

 numerous laterally and oppositely connate sporangia united 

 into a concrete mass, forming linear synangia, each cell opening 

 by a circular pore at their apices. 



1. D. alata, 8m.; Hook, et Grev.Ic. Fil. 1. 18; Hook. Gen.Fil. 



t. 7. "West Indies and Tropical America. 



2. D. nodosa, 8m. ; ScJik. Fil 1. 152 ; Hook, et Grev. Ic. Fil. 



t. 51. Asplenium nodosum, Linn. (Plum. Fil. 1. 108). 

 West Indies and Tropical America. 



