686 MINNESOTA BOTANICAL STUDIES. 



1900, no. 112. Henning, June 25, 1900, no. 190 and June 30, 

 1900, no. 379. Bemidji, July 4, 1900, no. 447, July 6, 1900, 

 no. 514, July 7, 1900, no. 521, July 10, 1900, no. 583, July n, 

 1900, nos. 646 and 660. Thief River Falls, July 19, 1900, no. 

 820 and July 23, 1900, no. 874. Red lake, July 26, 1900, 

 no. 89ia and August i, 1900, no. 1038. 



23. Parmelia saxatilis (L.) FR. var. sulcata NYL. 



On trees and rocks, and more frequently on old logs, fre- 

 quent. Battle lake, June 22, 1900, no. 134. Bemidji, July 

 4, 1900, no. 525 and July 7, 1900, no. 525. Thief River Falls, 

 July 19, 1900, no. 813. Red lake, August i, 1900, no. 1034 

 and August 2, 1900, no. 1049. 



24. Parmelia physodes (L.) ACH. 



On pines and tamarack, rare. Henning, June 28, 1900, no. 

 331. Bemidji, July 4, 1900, no. 429 and July 7, 1900, no. 514. 

 Red lake, July 27, 1900, no. 913 and August 3, 1900, no. 

 1071. 



25. Parmelia olivacea (L.) ACH. 



On trees, frequent, and rarely on rocks. Battle lake, June 

 19, 1900, no. 31. Leaf hills, June 26, 1900, no. 243. Bemidji, 

 July 4, 1900, nos. 443 and 446 and July 7, 1900, no. 513. 

 Thief River Falls, July 20, 1900, no. 830. Red lake, July 



26. 1900, no. 885, July 30, 1900, no. 991 and August i, 1900, 

 no. 1039. 



26. Parmelia olivacea (L.) ACH. var. aspidota ACH. 



On trees, common locally. Leaf hills, July 2, 1900, no. 



385. 



Not previously reported from Minnesota. 



27. Parmelia conspurcata (SCHAER.) WAINIO. 



On trees, locally common. Bemidji, July 12, 1900, nos. 

 672, 682 and 700. 



Not previously reported from Minnesota. 



28. Parmelia caperata (L.) ACH. 



Common on trees and rare on rocks. Battle lake, June 19, 

 1900, no. 26. Henning, June 25, 1900, no. 195 and July 2, 

 1900, no. 409. Bemidji, July 7, 1900, no. 527 and July u, 

 1900, no. 659. Thief River Falls, July 20, 1900, nos. 832, 

 833 and 841. Red lake, July 26, 1900, no. 898 and August 

 i, 1900, no. 1033. 



