9. 



OSTRICH FERN 



(Matteuccia struthiopteris) 



Fronds 1 to 6 feet long, in crown; nearly twice-pinnsute. 

 Pinnae of sterile frond much longer above center of blade. 

 Lower pinnae very short. Fertile frond much shorter than 

 sterile, pinnate, very stiff and resembles an ostrich 

 plxune • 



Moist places. Common. 



RUSTY WOODSIA 



(Woodsia ilvensis) 



Fronds 4 to 10 inches long; in tufts. Stipes jointed 

 near the base and covered with brown scales. Blade 

 pinnate, shining above and densely chaffy beneath. 

 Sori near the margin and almost concealed by the chaff. 

 On exposed ledges. Common on mountains. 



