ASPIDIUM 85 



Frond lanceolate 04. filix-mas) or ovate-oblong (A. marginalis); fruit-dots 

 in the former nearer the mid-vein than the margin, in the latter nearer the 

 margin. 



HABITAT. North America. 



DESCRIPTION or DRUG. As taken from the ground the rhizome consists 

 of a caudex around which are arranged the dark brown, somewhat 

 curved leaf-stalk remnants or stipes, about 25 to 50 mm. (i to 

 2 in.) in length, imbricated like the shingles of a roof; at the base 



FIG. 9. Dryopteris filix~mas Plant and section through spore case. 



they are densely surrounded by thin, glossy, chaffy scales of a 

 lighter color and somewhat transparent. The entire rhizome is from 

 100 to 300 mm. (4 to 12 in.) long, and from 50 to 62 mm, (2 to aj^ 

 in.) thick, flexible, tapering toward one end, usually split longitud- 

 inally, roughly scarred with remains of stipe bases or bearing several 

 coarse longitudinal ridges or grooves, pale green when fresh and be- 

 coming pale brown and with occasional elongated areas of the still 



