Barren pinna. 



CERATODACTYLIS OSMUNDIOIDES. 

 J. Smith. Fee. 



PLATE XXX. 



Llavea cordifolia, Lagasca. Hookbe, (not Liebmann.) 



Allosorus Karwinskii, KuNZE. Bentham. Hookeb. 



Botryogramme Karwinslcii, Fee. 



Ceratodactylis — From Keras — a horn, and dactylos — a finger, alluding to 

 the divisions of the fronds. Osmundioides — Osmunda-like. 



A VEET handsome, delicate-fronded, Osmunda-looking Fern. 



An evergreen stove species. 



Native of Mexico. 



Frond large and tripinnate, the fertile and sterile pinnules 

 diiferent. Sterile pinnules ovate-cordate, thin but firm, having 

 a thickened narrow margin; the veins closely pinnated and 

 forked, the margin finely spinulose-serrate; fertile pinnules, which 

 are situated only on the upper portion, forming a panicle, are 

 narrow, elongated, nearly terete, the margins membranaceous, 

 involute, and forming the involucres. 



Caudex brief, stout, flexuous, and scaly; stipes long, flexuous, 

 slender, and scaly; rachis flexuous and slender. 



Sori linear-oblong, and occupying nearly the entire length of 

 the pinnated veins of the upper pinnules of the frond. 



L 



