72 Pteidophytes of Lake Superior 



25. Dryopteris rigida (Hoffm.) Underw. 



Boggy woods near lighthouse, Porphyry Island, Lake 

 Superior. 



Among other things Prof. Hopkins notes that "The 

 one real reason for calling it rigida is that it has the glands 

 on the under side of the frond." After comparing the 

 specimens with some European specimens of rigida, 

 Prof. Hopkins continues " Lay the two sets of specimens 

 before you and read this line from Eaton: 'It has a 

 larger and broader frond than the European A. rigidum 

 but certainly presents no points of specific distinction; 

 and some of the Oregon specimens collected by Mrs. 

 Summers near the Willamette River are so nearly typi- 

 cal rigidum that they would not be challenged if mixed 

 with European specimens.'" Further,— of Watson's 

 description (Botany California, Vol. II, p. 346) the fol- 

 lowing is noted by Prof. Hopkins as being true of the 

 Lake Superior plant: "Fronds one or two feet long, 

 borne on moderately long very chaffy stalks, smooth 

 and green above, paler and glandular beneath, ovate- 

 lanceolate in outline, usually bipinnate; pinnae oblong 

 lanceolate, the lowest ones broadest and a trifle shoiter 

 than the middle ones; pinnules oblong (?), incised (?), 

 conspicuously veiny: sori large(?) nearer the midvein 

 than the margin; indusium firm, convex, orbicular with 

 a very narrow sinus, the edge glandular. " 



D. rigida has heretofore been recorded only from the 

 Old World and in America from Alaska to California, 

 the latter records being regarded by Underwood as 



represented by a variety (/>. rigida var. arguta (Kaulf.) 

 U nderw.) . 



26. Filix bulbifera (L.) Underw. 



Face of slate cliff, Oliver Creek, 3 mi. s. e. of Stanley. 



27. Filix fragilis (L.) Bernh. 



Upper cliff Ut. McKay, Ft. William; face of slate 

 cliff, Oliver Creek, 3 mi. s. e. of Stanley; rocky islet 



