Fink : LICHENS OF THE LAKE SUPERIOR REGION. 245 



resembling the last. However, the margins of the lobes are 

 quite strongly ciliate, and the lower surface of the thallus inter- 

 ruptedly so; possibly might be referred to P. perlata (L.) 

 ACH. var. ciliata. DC. Thallus rather thinner than my her- 

 barium specimens of P. perforata. 



30. Parmelia perforata (JACQ^) ACH. var. hypotropa NYL. 

 On rocks, rare. Grand Portage, June 23, 1897, no. 116. 

 Not previously reported from Minnesota. 



31. Parmelia crinita ACH. 



On rocks and once collected on trees, rare or infrequent. 

 Sterile. Grand Portage, June 23, 1897, no. 114. Gunflint, 

 July i, 1897, nos. 361 and 362. Tofte, July 10, 1897, no. 

 627. The plant differs from my Iowa and Ohio specimens in 

 that it is strongly ciliate on the upper surface of the thallus 

 among the branchlets and granules. 



32. Parmelia tiliacea (HOFFM.) FLOERK. 



On trees, rare or infrequent. Gunflint, July 2, 1897, no. 

 4O7a. Tofte (Carlton peak), July 10, 1897, no. 620. Bea- 

 ver Bay, July 14, 1897, no. 724a. Ely, July 28, 1897, no. 

 1018. 



Really more frequent along boundary at west. Was fre- 

 quently noted in Snowbank lake area and failure to get speci- 

 mens was an oversight. 



33. Parmelia tiliacea (HOFFM.) FLOERK. var. sublaevigata NYL. 

 On trees, rare. Snowbank lake area, July 23, 1897, no. 



896. 



Not previously reported from Minnesota. 



34. Parmelia borreri TURN. var. rudecta TUCK. 



On rocks and trees, rare or infrequent, except common in the 

 Snowbank lake area. All sterile except no. 744 on rocks. 

 Grand Portage, June 24, 1897, no. 188. Gunflint, July i, 

 1897, no. 369. Misquah hills, July 3, 1897, no. 431. Tofte 

 (Carlton peak) July 10, 1897, no. 612. Palisades, July 15, 

 1897, nos. 744 and 762. Snowbank lake area, July 30, 1897, 

 no. 839. Ely, July 28, 1897, no. 983. 



35. Parmelia saxatilis (L.) FR. 



On trees and rarely on rocks. Abundant or common and fre- 

 quently fruited. Grand Portage island, June 17, 1897, no. 7, 

 and June 21, 1897, no. 57. Misquah hills, July 3, 1897, no. 



