78 FERNS I BRITISH AND FOREIGN, 



** Sori naked. 



THIBE in. POLYPODIE-3E, J.Sm. 



Sori round, oblong, or linear, destitute of a special indusium. 



5. POLYPODIUM, Linn, in part. 



Rhizome generally short and thick, sometimes sub-hypogseous. 

 Fronds pinnatifid, pinnate, or bi-tripinnatifid, rarely simple, 

 smooth, villose, or squamiferous, from 6 inches to 2-3 feet high . 

 Veins forked, veiy rarely simple; venules free. Receptacles 

 punctiform, superficial, terminal on the lower anterior venules. 

 Sori round or rarely oval, transversely uniserial or solitary on 

 lacinise. 



Genus 5. Portion of mature frond. No. 7. 

 * Fronds pinnatifid. 



1. P. pectinatum, Linn.; Plum. Fil. t. 83; HooJc. Gard. 



Ferns, t. 10 ; Lowe's Ferns, 2, t. 21. Tropical 

 America. 



2. P." Paradises^ Lang, et Fisch. Ic. Fil. 1. 11 ; Lowe's Ferns f 



2, 1. 1. P. Otites, Hort. (non Linn.). Brazil. 



3. P. Schkuhrii, Radd. Fil Bras, t. 27. P. pectinatum, 



ScJik. Fil. t. 17 (excl. syn.). P. plumula, Moore 

 and Houlst. (non Humb.). P. plumosum, Hort. 

 Brazil. 



4. P. Martensii, Mett. P. affine, Mart, et Gal. Fil. Mex. t. 



8, /. 1 (not Blume). Mexico. 



5. P. vulgare, Linn. ; Hook. Brit. Ferns, t. 2 ; Eng. Bot. 



1149 ; Lindl. and Moore, Nat. Print. Ferns, t. 1, /. 

 A, B, 0, D ; Bolt. Fil. Brit. t. 18 ; Sowerty, Ferns of 

 Gr. Brit. 1. 1. 



