272 MINNESOTA BOTANICAL STUDIES. 



226. Buellia parmeliarum (SOMMERF.) TUCK. 



On Parmelia borreri, rare. Snowbank lake area, July 22, 

 1897, no. 885. 



Not previously reported from Minnesota. 



227. Opegrapha varia (PERS.) FR. 



On trees, common on cedars except along lake Superior. 

 Gunflint, July i, 1897, no. 334. Misquah hills, July 5, 1897, 

 no. 502. Tofte (Carlton peak), July 10, 1897, no. 593. Snow- 

 bank lake area, July 21, 1897, no. 857. 



228. Opegrapha varia (PERS.) TUCK. FR. var. notha ACH. 

 On cedars, locally abundant. Rose lake, June 28, 1897, 



no. 220. 



Not previously reported from Minnesota. 



229. Graphis scripta (L.) ACH. 



On trees, frequent or common. Grand Portage island, June 

 21, 1897, no. 66. Gunflint, July i, 1897, nos. 314 and 317. 

 Tofte (Carlton peak), July 10, 1897, no. 576. Beaver Bay, 

 July 15, 1897, no. 716. Snowbank lake area, July 21, 1897, 

 no. 858. 



230. Graphis scripta (L.) ACH. var. recta (HUMB.) NYL. 



On birch trees, infrequent. Grand Portage, June 24, 1897, 

 no. 189. Misquah hills, July 3, 1897, no. 405. Tofte, July 

 12, 1897, no. 650. Snowbank lake area, July 23, 1897, no. 

 897. 



231. Graphis scripta (L.) ACH. var. limitata ACH. 



On trees, very rare. Resembles G. dendritica externally as 

 to apothecia. Misquah hills, July 5, 1897, no. 451. 

 Not previously reported from Minnesota. 



232. Arthonia dispersa (SCHRAD.) NYL. 



On Acer spicatum, abundant. Grand Portage, June 23, 1897, 

 no. 86. Tofte (Carlton peak), July 10, 1897, no. 590. Beaver 

 Bay, July 13, 1897, no. 714. Snowbank lake area, July 20, 

 1897, no. 845. Ely, July 28, 1897, no. 979. 



Not previously reported from Minnesota. 



233. Arthonia radiata (PERS.) TH. FR. 



On trees in low places, common. Grand Portage island, 

 June 23, 1897, no. 123. Rose lake, June 28, 1897, no. 219. 

 Gunflint, July i, 1897, no. 315, and July 2, 1897, no. 388. 

 Tofte (Carlton peak), July 10, 1897, no. 584, Beaver Bay, 



