20G MINNESOTA BOTANICAL STUDIES. 



851. Koochiching, July 26, 1901, no. 925 and July 30, 1901, 

 no. 1019. 



89. Collema limosum Ach. 



On shaded earth, rare. Koochiching, July 26, 1901, no. 918. 



90. Leptogium lacerum (Sw.) Fr. 



On earth and mossy rocks, rare. Beaudette, June 22, 1901, 

 no. 119. Oak island, July 9, 1901, no. 440. Emo, July 24, 

 1901, no. 853. Koochiching, July 29, 1901, no. 970. Rainy 

 Lake City, August 5, 1901, no. 1208. Kettle falls, August 13, 

 1901, no. 1412. 



91. Leptogium pulchellum (Ach.) Nyl. 



On cedars in swamps, rare. Warroad, June 28, 1901, no. 254 

 and July 5, 1901, no. 387. Emo, July 23, 1901, no. 835. 

 Koochiching, July 29, 1901, no. 997. 



92. Leptogium tremelloides (L.) Fr. 



Frequent on rocks and less common on cedars in swamps. 

 Beaudette, June 24, 1901, no. 145. Oak island, July 8, 1901, 

 no. 430 and August 9, 1901, no. 433. Emo, July 17, 1901, 

 no. 678 and July 17, 1901, no. 812. Koochiching, July 26, 

 1901, no. 904. Rainy Lake City, August 1, 1901, nos. 107 1 

 and 1078 and August 8, 1901, no. 1246. Kettle falls, August 

 12, 1901, no. 1409. Harding, August 20, 1901, no. 165 1. 

 Tower, August 23, 1901, no. 1690. 



93. Leptogium myochroum (Ehrh., Schaer.) Tuck. 

 Frequent on trees, especially in swamps, rare on rocks. 



Beaudette, June 19, 1901, no. 42, June 21, 1901, no. 106 and 

 June 24, 1901, no. 144. Oak island, July 8, 1901, no. 412. 

 Emo, July 17, 1901, no. 643. Koochiching, July 27, 1901, no. 

 934. Kettle falls, August 12, 1901, nos. 1360 and 1388. 

 Tower, August 23, 1901, no. 1684. 



94. Leptogium myochroum (Ehrh. , Schaer.) Tuck. var. tomen- 

 tosum Schaer. 



On trees, frequent. Warroad, June 27, 1901, no. 214 and July 

 1, 1901, no. 310. Rainy Lake City, August 3, 1901, no. 1153. 

 Kettle falls, August 10, 1901, no. 137 1. Harding, August 16, 

 1901, no. 1527. 



95. Placodium elegans (Link.) DC. 



On rocks, infrequent. Flag island, July 12, 1901, no. 548. 

 Emo, July 22, 1901, no. 807. Rainy Lake City, August 5, 

 1901, no. 1191 and August 6, 1901, no. 1238. Kettle falls, 



