—75— 



CAMPTOSORUS SIBIRICUS. 



WE present herewith an illustration of our walking fern's 

 only near relative, Camptosorus Sibiricus. It is a native 

 of the far east, and it is rare that a specimen finds its 

 way into an American collection. The plact figured here came 

 from Japan. 



It will be seen that while there is a general resemblance be- 

 tween the two species, there are many points of difference. In 

 Sibiricus the base of the frond is not heart-shaped , and the auricles, 

 if any, are smaller. In the American species the frond is broad- 

 est at base; in Sibericus it is narrow at base and usually much 

 broader at about the middle. Sibiricus is also usually smaller and 

 has thinner f ol iage than rhizophy llus. The species are alike in fruit- 

 ing at the apex of the fronds, and in producing sterile fronds that 

 differ somewhat from the fertile. In Sibiricus these are ovate 

 or lanceolate, and in rhizophyllus, nearly triangular or with a 

 rounded apex. — W. N. C. 



