WOODSIA ILVENSIS. 



71 



RAY'S WOODSIA, {natural size). 



€\mdm. 



Genus. — Woodsia. Caudex tufted, terminating in a crown : 

 midvein of ultimate divisions indistinct : lateral veins branched, 

 free : involucre seated near the extremity of each branch, its 

 base inclosing the base of a circular cluster of capsules, its 

 margin split into capillary segments, which mingle with the 

 capsules. 



Species. — Ilvensis. Stipes sometimes as long as the frond, 

 but generally shorter, distinctly articulated towards the base : 

 frond lanceolate, pinnate : pinnae oblong, subopposite, pin- 

 natifid, scaly beneath. 



