1. 
   Vittarioideae
   (from the article `Adiantaceae`) In this classification, a second subfamily, Vittarioideae (shoestring ferns), contains seven genera, the largest being Vittaria and Antrophyum, both ... ...rigid; leaves 1- to multi-pinnate; veins mostly free; Adiantum, Cheilanthes, Pellaea, Pteris, and 45 other gene...
   Found op http://www.britannica.com/eb/a-z/v/31
   
   
2. 
   Vittarioideae
   Vittarioideae is a subfamily of the Pteridaceae family of ferns, in the order Polypodiales, class Polypodiopsida. This subfamily includes the previous families Adiantaceae (adiantoids or maidenhair ferns) and Vittariaceae (vittarioids or shoestring ferns). The following diagram, shows a likely phyl...
   Found op http://en.wikipedia.org/wiki/Vittarioideae
   
   

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