AN ENUMERATION OF CULTIVATED FEENS. 
95 
22. PLEURIDIUM, Fee ; J. Sm. 
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 obliquely uniserial. 
1. P. crassifolium, 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. (1860). — Tropical 
America. 
3. P. crassinervium, J. Sm. Polypodium crassinervium, 
Blume, FI. Lav. t. 61. — Java. 
ff Sori obliquely biserial. 
4. P. rupestre, Fee. Polypodium rupestre, Blume, FI. Jav. 
t. 55,/. 2; t. 60,/. 1-3. — Java and Luzon. 
5. P. triquetrum, J. Sm. Polypodium triquetrum, Blume, 
FI. Jav. t. 69. — Java. 
