AN ENUMERATION OF CULTIVATED FERNS. 95 



22. PLEURIDIUM, Fee ; J. 8m, 



Rhizome short or elongating. Fronds simple, pinnatifid or 

 pinnate, coriaceous, firm, marginate ; segments articulated with. 



Genus 22. Portion of fertile frond, natural size. No. 1. 



the rachis. Veins compound anastomosing ; primary veins 

 evident, elevated, costaeform, straight. Receptacles compital. 

 Sori round or oval, or by confluence oblong, transversely uni- 

 serial or obliquely 1-2-serial. 



* Fronds simple. 

 f Sori olliquely uniserial. 



1. P. crassifolilim, Fee. Polypodium crassifolium, Linn.; 



Plum. Fil. t. 123. Anaxetum crassifolium, Schott. 

 Gen. Fil. t. 1. Polypodium coriaceum, Radd. FiL 

 Bras. t. 25. Tropical America. 



2. P. albo-punctatissimum, J". Sm. Polypodium albo- 



punctatissimum, Linden's Cat. (I860). Tropical 

 America. 



3. P. crassinervium, /. 8m. Polypodium crassinervium, 



Blume, Fl. Jav. t. 61. Java. 



j-f Sori obliquely liserial. 



4. P. rupestre, Fee. Polypodium rupestre, Blume, Fl. Jav. 



t. 55, /. 2; t. 60, f. 1-3. Java and Luzon. 



5. P. triciiietrum, J. Sm. Polypodium triquetrum, Blume, 



Fl. Jav. t. 69. Java. 



