AN ENUMERATION OP CULTIVATED FERNS. 189 
receptacle, constituting a linear, continuous or interrupted 
sorus. Indusium linear, marg: 
Vernation fasciculate, decumbent 
ccespitosc. 
f Fronds simply pinnate. 
P. longifolia, Linn. ; {Plum. 
Fil. t. 69); Schk. Fit. 
t. 88; Lowe's Ferns, 3, 
t. 42. P. vittata, Linn. 
P. ensifolia, Sw. P. lan- 
ceolata, Besf. P. Alpini, 
Desv. P. obliqua, Fdrsk. 
P. costata, Bory. P. 
eequalis, Presl. P. acu- 
minatissimum, Blume. 
P. amplectans, Wall. P. 
Babamensis, Fee. — Tro- 
pics and Northern Tem- 
perate Zone. 
Portion of fertile frond, natural size 
ft Fronds pinnate, the lower pair or more of pinnae 
lobed or pinnate. 
2. P. Cretica, Linn. ; Schk. Fil. t. 90; Lowe's Ferns, 3, t. 43. 
P. serraria, Sw. P. pentaphylla, Willd. 
Var. — albo-lineata, Ilook.Bot. Mag. t. 5194; Lowe's 
New Ferns, t. 25. 
Tropics and North Temperate Zone. 
