162 POLYBOTRYA OSMUNDACEA. 



Sterile frond bi-tripinnate; pinnules oblong-acuminate; base, 

 of a rounded cuneate form and bluntly lobed. Fertile one 

 contracted, also bi-tripinnate, and erect in habit. 



Stipes scaly. 



Sori amorphous. 



Veins pinnate; venules external, free, and simple. 



Rhizoma creeping. 



Fronds lateral, and adherent to a coarse, scaly, creeping 

 rhizoma. 



Length of frond from twenty-four to thirty inches. 



For fronds my thanks are due to Mr. Smith, Curator of 

 the Royal Gardens, Kew. 



It may be procured of Messrs. Veitch, of Chelsea; Sim, of 

 Foot's Cray; and A. Henderson, of Pine-apple Place. 



The illustration is from Mr. Smith's frond. 



