78 
FERNS : BRITISH AND FOREIGN. 
** Sori naked. 
Tribe III.— POLYPODIES, J.Sm. 
Sori round, oblong, or linear, destitute of a special indusium, 
5. POLYPODIUM, Linn, in part. 
Rhizome generally short and thick, sometimes sub-hypogasous. 
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. 
Sori round or rarely oval, transversely uniserial or solitary on 
laciniae. 
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. t. 11 ; Loive’s Ferns, 
2, 1. 1. P. Otites, Hort. ( non Linn .). — Brazil. 
3. P. Schkuhrii, Radd. Fil. liras, t. 27. P. pectinatum, 
Schk. Fil. t. 17 G ( excl . syn.). P. plumula, Moore 
and Houlst. ( non Humh.). P. plumosum, Hort. — 
Brazil. 
4. P. Martensii, Mett. P. affine, Mart, et Gal. Fil. Mex. t. 
8, /. 1 (not Plume). — Mexico. 
5. P. vulgare, Linn. ; Hook. Brit. Ferns, t. 2 ; Eng. Pot. 
1149; Lindl. and Moore, Nat. Print. Ferns, t. 1 ,/. 
A, P, C, D ; Bolt. Fil. Brit. t. 18 ; Sowerhy, Ferns of 
Gr. Brit. 1. 1. 
