692 MINNESOTA BOTANICAL STUDIES. 
72. Lecanora rubina (ViLL.) Ac. 
On granitic rocks, infrequent or rare. Battle lake, June 20, 
1900, nos. 46, 49 and 51. Leaf hills, June 27, 1900, no. 284. 
Bemidji, July 11, 1900, no. 594. 
73. Lecanora muralis (SCHREB.) SCHAER. 
On rocks, rare. Red lake, August I, 1900, no. 1030. 
74. Lecanora muralis (SCHREB.) SCHAER. var. saxicola SCHAER. 
On granitic rocks, locally frequent. Battle lake, June 20, 
1900, no. 107. Leaf hills, June 26, 1900, no. 201. 
75. Lecanora muralis (SCHREB.) SCHAER. var. versicolor FR. 
On lime rocks, locally frequent. Battle lake, June 20, 
1900, nos. 83, 97 and 102. 
76. Lecanora pallida (ScHREB.) SCHAER. 
On cedar in swamp, rare. Bemidji, July 13, 1900, no. 717. 
77. Lecanora subfusca (L.) Acn. 
On trees and rocks, common in last two localities only, 
Battle lake, June 20, 1900, nos. 54 and 75. Henning, June 
5; To00, no: 198.' ‘Leaf hills, June. 27, 1900, mos 2gee 
Bemidji, July 4, 1900, no. 457, July 5, 1900, nos. 471 and 499 
and July 11, 1900, no. 606. ‘Thief River Falls, July 20, 1900, 
no. 839. Red lake, August 3, 1900, no. 1075. 
No. 54 is a peculiar form on rocks with scant thallus. No. 
606 has border of exciple much raised. 
78. Lecanora subfusca (L.) Acu. var. argentata Acu. 
On pines, rare. Red lake, August 3, 1900, no. 1066. 
79. Lecanora subfusca (L.) Acu. var. coilocarpa Acu. 
On pine logs, rare. Red lake, July 30, 1900, no. 993. 
So. Lecanora variolascens Nyu. 
On trees, common in Minnesota and Iowa, but usually sterile 
and hence not determinable. Battle lake, June 20, 1900, no. 
76. Henning, June 29, 1900, no. 358. Thief River Falls, 
July 18, 1900, no. 800. Red lake, July 28, 1900, no. 975. 
Not previously reported from Minnesota and new to North 
America. 
81. Lecanora hageni Acu. 
On: rocks, rare. Battle lake, June 20, 1900, no. 109; 
Bemidji, July 11, 1900, no. 640. 
