AN ENUMERATION OF CULTIVATED FEKNS. 



22. PLEURIDITJM, Fie ; J. 8m. 



"Rhizome short or elongating. Fronds simple, pinnatifd ir 

 pinnate, coriaceous, firm, marginate ; segments articulated with 



Genus 22. — Portion of fertile frond, natural size. No. ]. 



the rachis. Veins compound anastomosing ; pr'tnary veins 

 evident, elevated, costaeform, straight. Receptacles compital. 

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

 sonal or obliquely 1-2 -serial. 



* Fronds simple, 

 ■f Sori obliquely unisonal. 



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



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

 Gen. Fil. t. 1. Polypodium coriaceum, Badd. Fil. 

 Bras. t. 25. — Tropical America. 



2. P. albo-punetatissimum, J. 8m. Polypodium albo- 



punctatissimum, Linden's Cat. (1860). — Tropical 

 America. 



3. P. crassinervium, J. 8m. Polypodr.im crasainervium, 



Blume, Fl. Jav. t. 61. — Java. 



ff Sori obliquely biserial. 



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



t. 5b, f. 2; t. 60, f. 1-3. — Java and Luzon. 



h. P. triquetrum, /. 8m. Polypodium triojuetrum, Blume, 

 FL -Jau. t. 69.— Java. 



