78 FERNS : BEITISH AND FOREIGN. 



** Son naked. 



TRIBE III. POLYPODIES, J.Sm. 

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



5. POLYPODIUM, Linn, in part. 



Rhizome generally short and thick, sometimes sub-hypogaeous. 

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

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

 Veins forked, very rarely simple; venules free. Receptacles 

 punctiform, superficial, terminal on the lower anterior venules. 

 8ori 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; Hook. Gard. 



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

 America. 



2. P. Paradisese, Lang, et Fisch. Ic. Fil. 1. 11 ; Lowe's Ferns, 



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



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



ScTik. Fil. t. 17 C (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.l,f. 

 A, B, C, D ; Bolt. Fil. Brit. t. 18 ; Sowerby, Ferns of 

 Gr. Brit. 1. 1. 



