Fink: lichens of the northern boundary. 229 



Not previously reported from Minnesota and new to North 

 America. 



250. Buellia turgescens (Nyl.) Tuck. 



On old wood, rare. Oak island, July 9, 1901, nos. 442 and 

 445- 



251. Buellia schaereri De Not. 



On pines, rare. Rainy Lake City, August 6, 1901, no. 1242. 

 Not previously reported from Minnesota. 



252. Buellia badioatra (Flk. Schaer.) Kbr. 



On rocks, rare. Blueberry island, July 13, 1901, no. $66. 

 Not previously reported from Minnesota and new to the Mis- 

 sissippi valley. 



253. Buellia concreta (Kbr.) Eck. 



On rocks, infrequent. Oak island, July 15, 1901, no. 622. 

 Rainy Lake City, August 5, 1901, no. 1189. 



Not previously reported from Minnesota and new to the 

 United States. 



254. Buellia obscurata (Ach.) Eck. 



On rocks, frequent. Kettle falls, August 14, 1901, no. 1472. 

 Not previously reported from Minnesota and new to the 

 United States. 



255. Buellia concentrica (Dav.) Fink. 



On rocks, rare. Rainy Lake City, August 2, 1901, no. 

 1106. Kettle falls, August 8, 1901, no. 1313. 



Not previously reported from Minnesota and new to the 



United States. 



256. Buellia petrsea (Flot.) Tuck. 



On rocks, common. Warroad, July 4, 1901, no. 365. Flag 

 island, July 12, 1901, no. 560. Blueberry island, July 13, 

 1901, no. 583. Emo, July 20, 1901, nos. 783 and 790 and 

 July 22, 1901, nos. 794 and 804. Koochiching, July 26, 1901, 

 no. 915. Rainy Lake City, August 3, 1901, no. 1161. Kettle 

 falls, August 10, 1901, no. 1354. Harding, August 17, 1901, 

 no. 1566 and August 20, 1901, no. 1642. Tower, August 24, 

 1901, no. 1751 and August 28, 1901, no. 1820. 



257. Buellia petraea (Flt.) Tuck. var. montagnaei Tuck. 



On rocks, common. Oak island, July 10, 1901, no. 493. 

 Rainy Lake City, August 1, 1901, no. 792 and August 6, 1901, 



