78 



FERNS : BRITISH AND FOREIGN. 



** Son naked. 



Tjiibe ill.— POLYPODIES, J. 8m, 



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



5. POLYPODITJM, Linn, in part. 



Rhizome generally short and thick, sometimes sub-hypogisous. 

 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 

 punetiform, superficial, terminal on the lower anterior venules. 

 Son round or rarely oval, transversely uniserial or solitary on 

 lacinios. 



Genus 5.— Portbn of mature frond. No. 7. 

 * Fronds pinnatifid. 



1. P. psctinatum, Linn. ; Plum. Fil. t. 83 ; Hooh. Gard. 



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

 America. 



2. P. ParadisesBj Lanj. et Fiscli. la. Fil. 1. 11 ; Lowe's Ferns, 



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



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



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

 and Houlst. (non ITumb.). 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. ; Booh. Brit. Ferns, t. 2 ; Fng. Bot. 



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

 A, B, G, JD; Bolt. Fil. Brit t. 18; Sowerby, Ferns of 

 Gr. Brit. 1. 1. 



