Fig. 697. Stenochlaeiia sorbifolia (L.) J. Sm. Drawings, after Christ, showing the great variability in 

 leaf-form. a = end of the sterile leaf. (5 = part of a sporophyll. (r = leaf of a young plant. (Z'— type 

 described as Scolopendriuni D' Urvillei Bory. e = pinnatitid adventitious leaves. /= pinnate adventi- 

 tious leaves. ^ = doubly pinnate adventitious leaves of Asplenioid type, /z = trebly pinnatifid adventi- 

 tious leaves. / = type described as Davallia achilleaefoUa Wall. All are of the natural size. The highly 

 branched forms of leaf may be regarded as reversions to an ancestral highly pinnate type. 



