70 



surfaces naked. Sori roundish or obverseiy 

 kidney-shaped. [Fig. 27.] 



FIG. 27.Adiantum capillus veneris L. 



(a) A small plant (nat. size). (b) A pinnule ( x 2 ). 



(c) Var. mariesii, portion of frond (nat. size). 



(d) Var. fergttsoni, pinnule (nat. size). 



