POLYSTICHUM ACULEATUM. 



Ill 



PRICKLY FERN, {one-sixteenth the natural size). 



Genus. — Polystichum, (see page 103). 



Species. — Aculeatum. Caudex tufted : stipes short, densely 

 chaffy : frond linear, rigid, leathery, glabrous, bipinnate : pinnae 

 pinnate or pinnatifid : pinnules distinct (aculeatum, Sm.) or de- 

 current (lobatum, Sm.), serrate ; serratures spinose : clusters 

 of capsules circular, crowded, often confluent, confined to the 

 upper part of the frond. 



Polypodium aculeatum, Linn. Sp. PI. 1552. 



Polypodium lobatum, " af&nis prsecedenti [P. angulare, inf.] 



an distincta sit species ? " Huds. Fl. Ang. 459 ; With. 



Bot. An: Veg. 651. 



