128 ACROSTICHUM N ICOTIAN^FOLIUM. 



Sterile frond glabrous, pinnate, and sliining; the pinnae 

 being oblong-acuminate, undulated, large, and somewhat mem- 

 branous; the basal ones petiolate, and roundish at the base, 

 the upper pinnae adnate-decurrent. Fertile frond pinnate or 

 bipinnate below; the pinnae oblong-ovate; the basal ones 'pe- 

 tiolate and the upper ones adnatc. 



Stipes covered with narrow scales, scaly near the base. 



Fronds lateral, and adherent to a creeping rhizoma. Fertile 

 fronds erect in habit. 



Sori amorphous. 



Veins pinnate; venules compoundly anastomosing. 



Length of frond from twelve to thirty inches; colour bright 

 green. 



For a frond my thanks are due to M. Schott, Director of 

 the Imperial Gardens of Schonbriinn, near Vienna. 



It is in the Catalogues of Messrs. Sim, of Foot's Cray; A. 

 Henderson, of Pine-apple Place; E. G. Henderson, of 

 Wentworth; and Booth, of Hamburg. 



The illustration is from M. Schott's frond. 



