70 
Surfaces naked. Sori roundish or obverseiy 
kidney-shaped. [Fig. 27.] 
; ; _ Fic. 27.—Adiantum capillus veneris L. 
(a) A small plant (nat. size). (b) A pinnule ( x 2). 
(c) Var. mariesit, portion of frond (nat. size). 
{d) Var. fergusoni, pinnule (nat. size). 
