254 MINNESOTA BOTANICAL STUDIES. 



85. Collema pycnocarpum Nyl. 



On trees, rare. Snowbank lake area, July 27, 1897, nos. 

 968 and 974. 



86. Collema flaccidum Ac H. (?) 



On high rocks, rare. Misquah hills, July 5, 1897, no. 495. 

 Sterile, but with the thallus corresponding with tree forms 

 farther south, except that the plant is larger. 



87. Collema nigrescens (Huds.) Ach. 



On trees, especially Populus, common or frequent. Grand 

 Portage, June 19, 1897, no. 36, and June 23, 1897, no. loi. 

 Rose lake, June 28, 1897, no. 221. Gunflint, July 30, 1897, 

 no. 266. Misquah hills, July 5, 1897, no. 483. Beaver Bay, 

 July 15, 1897, no. 783. Snowbank lake area, July 19, 1897, no. 

 822, and July 21, 1879, no. 874. Ely, July 28, 1897, no. 1014. 



88. Collema furvum (Ach.) Nyl? 



On wet rocks, frequent. Grand Portage island, June 23, 

 1897; no. 156. Tofte, July 12, 1897, no. 646. Not typical. 

 Not previously reported from Minnesota. 



89. Leptogium lacerum (Sw\) Fr. 



On rocks, rare and sterile. Snowbank lake area, July 21, 

 1897, no. 867. 



90. Leptogium lacerum (Sw.) Fr. var. pulvinatum Moug. and 



Nestl. 



On rocks, rare. Snowbank lake area, July 29, 1897, no. 965. 



Not previously reported from Minnesota. 



91. Leptogium tremelloides (L.) Fr. 



On rocks and rarely on trees. Widely distributed, but usually 

 rare locally. Portage between South Fowl lake and Pigeon 

 river, June 26, 1897, no. 208. Gunflint, July i, 1897, nos. 

 349 and 358. Misquah hills, July 3, 1897, no. 424. Beaver 

 Bay, July 15, 1897, no. 781. Snowbank lake area, July 20, 

 1897, no. 843, July 26, 1897, no. 962, and July 27, 1897, no. 

 974a. Ely, July 28, 1897, nos. 977 and 1008. 



92. Leptogium myochroum (Ehrm., Schaer.) Tuck. 



On trees and rocks, frequent. Grand Portage island, June 

 19, 1897, no. 24. Gunflint, July i, 1897, no. 341. Tofte 

 (Carlton peak), July 10, 1897, no. 598. Snowbank lake area 

 July 19, 1897, no. 820. 



Not previously reported from Minnesota. 



