28 FERNS AND THEIR ALLIES 



upper surfaces of the pinnae, which are quite 

 heavy in texture. The stipe is chaffy. 



Its habitat is swamps, where it is found 

 rather common, growing from one to two feet 

 high. 



The sterile fronds lie close to the ground and 

 are broader and shorter than the fertile ones. 

 They also have shorter stipes and are evergreen. 



The fruit-dots are large, half-way between 

 the midrib and margin ; they mature in July. 

 The thin indusia are smooth, naked, and round- 

 kidney-shaped, the sinus shallow. 



CLINTON'S ■WOOD FERN. 



Aspidium cristaticm Clintonianum (^Dryopieris cris- 

 tata CUntoniana). 



This is a larger fern than the typical form, 

 being from two to three feet high. Frond nearly 

 twice pinnate ; pinnae deeply pinnatifid, the 

 divisions linear-oblong, obtuse, obscurely ser- 

 rate, or the lowest ones sometimes pinnately 

 lobed. The stipe is chaffy, with bright brown 

 scales. 



It is usually found with the type in swampy 

 woods, but is not termed common. It is a 

 showy fern, and is often mistaken for Goldie's 

 Fern, but may be distinguished by the pinnae 

 being broadest at the base, also by the color, 

 which is lighter green. 



