296 CHARACTEES OF TRIBES AND GENEEA. 



their fronds, which with the vernation being erect or de- 

 cumbent, enables us to arrange the species as follows. 



* Vernation fasciculate, decumbent, ccespitose. 

 j" Fronds pinnate. 



Sp. P, longifolia, Linn, (v v.) 



OBS. The wide geographical range of this plant has 

 given rise to the multiplication of specific names, many 

 authors raising the representative of different localities to 

 the rank of species, there being no less than eighteen 

 synonyms given in the " Species Filicum." 



P. Moluccana, Bl. ; P. opaca, J. Sm. 



ff Fronds pinnate, the lower pair or more of pinnce equally 

 or unequally lobed or pinnate. 



P. pellucida, Pr. ; P. cretica, Linn, (v v.) ; P. hetero- 

 dactyla, Reinw. (v v.) ; P. dactylina, Hook. ; P. crenata, 

 Sw. (v v.) ; P. heteromorpha, Fee ; P. Grimthii, Hook. ; 

 P. serrulata, Linn, (v v.) ; P. mutilata, Linn, (v v.) ; P. 

 distans, J. Sm. ; P. umbrosa, R. Br. (v v.) ; P. Dalhousiae, 

 Hook. ; P. irregularis, Kaulf. ; P. marattisefolia, Hook. ; P. 

 semipinnata, Linn, (v v.) ; P. heterophylla, Linn, (v v.) 



** Vernation fasciculate, caudex erect, simple, rarely 

 ccespitosft. 



f Fronds pinnate, pinnce pinnatifid, the lower pair or more 

 bipartite or pinnate. 



P. longipinnula, Wall. P. argyrea, Moore (v v.) ; P. 

 aspericaulis, Wall, (v v.) ; P. tricolor, Linden (v v.) ; P. 

 quadriaurita, Retz. (v v.) ; P. spinescens, Presl ; P. sulcata, 

 Link, (v v.) ; P. repandula, Link. ; P. glaucovirens, Linden 

 (v v.) j P. pungens, Willd. (v v.) ; P. decussata, J. Sm. ; 



