ALLOSORUS CRISPUS. 



35 



THE PAESLEY FERN, {half the natural size). 



ROCK BRAKES. 



€\mdm. 



Genus. — Allosorus. Midvein distinct, lateral veins free : 

 involucre not apparent : capsules in circular clusters near 

 the extremity of the lateral veins, which are often divided : 

 epidermis prolonged, bleached, reflexed, entire, and covering 

 the capsules in the manner of an involucre. 



Species. — Crispus. Caudex prostrate : stipes as long as 

 the frond : fronds of two kinds, both deltoid, and divided into 

 numerous, leaf-like, stipitate divisions. 



Osmunda crispa, Linn. Sp. PI. 1522; Lightf. Fl. Scot. 655 ; 

 Huds. Fl. Ang. 450 ; Bolt. Fil. Brit. 10, t. 7. 



