AN ENUMERATION OP CULTIVATED FERNS. 



189 



receptacle, constituting a linear, continuous or interrupted 

 sorus. Indusium linear, marginal. 



* Vernation fasciculate, decumbent, 



f Fronds simply pinnate. 



1. P. longifolia, Linn. ; (Plum. 

 Fil. t. 69); Sclik. Fil. 

 t. 88; Lowe's Ferns, 3, 

 t. 42. P. vittata, Linn. 

 P. ensifolia, Sw. P. lan- 

 ceolata, Desf. P. Alpini, 

 Desv. P. obliqua, Forsk. 

 P. costata, Bory. P. 

 aequalis, Presl. P. acu- 

 minatissimum, Blume. 

 P. amplectans, Wall P. 

 Bahamensis, Fee. Tro- 

 pics and Northern Tem- 

 perate Zone. 



Genus 96. Barren piruia. No. 4. 



Portion of fertile frond, natural size. 



ff Fronds pinnate, the lower pair or more of pinnae 

 lobed or pinnate. 



2. P. Cretica, Linn. ; Sclik. Fil. t. 90; Lowe's Ferns, 3, t. 43. 

 P. serraria, Sw. P. pentaphylla, Willd. 



Var. albo-lineata, Hooh.Bot. Mag. t. 5194 ; Lowe's 

 New Ferns, t. 25. 



Tropics and Torth Temperate Zone. 



