AN ENUMERATION OF CULTIVATED FERNS. 269 



163. DAN^A, 8m. 



Vernation uniserial, ooatiguous, decumbent; sarmentum 

 thick, fleshy ; each frond rising from between two short 

 stipnlssform appendages, and having the stipes once or more 

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

 the fertile usually somewhat contracted ; pinnse opposite, linear- 

 lanceolate) articulated with the raohis. Veins forked ; venules 



Genus 153. — Barren and fertile front!, natural size ; 

 Nu. 1. 



synangium enUrged. 



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 unitud 

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

 )y a circular pore at their apices. 



' 2). alata, 8m.; Sooh. et Grev.Ic. Ml. <. 18; Rooh. Oen.Fil. 

 t. 7. — West Indies and Tropical America. 



2. D. nodosa, 8m. ; 8chh. Fil. 1. 162 ; Hook, et Gr&v. Id. Fit 

 t. 61. Asplenium nodosum, iiTMi. {Plwn. Fil. 1. 108). 

 — West Indies and Tropical America. 



