Fink: lichens of the northern boundary. 225 



221. Biatora lucida (Ach.) Fr. 



On shaded rocks, frequent. Rainy Lake City, August 5, 

 1901, no. 1204, and August 6, 1901, no. 1235. Kettle falls, 

 August 9, 1901, no. 1322. Harding, August 20, 1901, no. 

 1647. 



222. Biatora heerii He pp. 



On Pcltigera canina (L.) Hoffm., rare. Tower, August 29, 

 1901, no. 1884. 



Not previously reported from Minnesota. 



223. Biatora oxyspora (Tul.) Tuck. 



On Parmelia bor?'cri Turn, on cedars in swamps, common. 

 Warroad, June 29, 1901, no. 271, and July 1, 1901, no. 301. 

 Oak island, July 8, 1901, nos. 397 and 417. Mainland, July 

 16, 1901, no. 630. Emo, July 17, 1901, no. 670. Koochich- 

 ing, July 31, 1901, no. 1026. Rainy Lake City, August 7, 

 1901, no. 1258. Kettle fails, August 14, 1901, no. 1466. 

 Tower, August 26, 1901, no. 1767. 



224. Biatora mixta Fr. 



On Pofiulus, infrequent. Beaudette, June 21, 1901, no. 100, 

 Warroad, June 25, 1901, no. 157. 



Not previously reported from Minnesota. 



225. Biatora atropurpurea (Mass.) Hepp. 



On Populus and dead wood, common on the former. War- 

 road, June 25, 1901, no. 168 and July 2, 1901, no. 333. Oak 

 island, July 8, 1901, no. 428. Emo, July 18, 1901, no. 689 and 

 July 23, 1901, no. 833. Koochiching, July 26, 1901, no. 897. 

 Rainy Lake City, August 7, 1901, no. 1263. 



Hypothecium frequently brown. 



226. Biatora sphaeroides (Dicks.) Tuck. 



On bases of trees, rare. Beaudette, June 19, 1901, no. 57 

 and June 24, 1901, no. 135. Koochiching, July 29, 1901, no. 

 983. Rainy Lake City, August 5, 1901, no. 1194. 



227. Biatora hypnophila (Turn.) Tuck. 



Frequent on mossy tree bases and rarely on earth. Beau- 

 dette, June 24, 1901, no. 146. Warroad, June 26, 1901, no. 

 181 and June 27, 1901, nos. 205 and 211. Koochiching, July 

 29, 1901, no. 985. Rainy Lake City, August 7, 1901, no. 



1257. 



