Fink : LICHENS OF THE NORTHERN BOUNDARY. 205 



81. Ephebe pubescens FR. 



On flat rocks, rare. Harding, August 21, 1901, no. 1659. 



82. Ephebe solida BORN. 



On rocks, locally frequent. Rainy Lake City, August i, 

 1901, no. 794. 



Both of the above were carefully examined and showed fun- 

 gal hyphae protruding from the filaments in clusters. The 

 hyphae in E. solida Born, were 3.5 to 6 mic. in diameter, much 

 larger than those in the above species. 



83. Pyrenopsis sp. 



On rocks, rare and sterile. Blueberry island, July 13, 1901, 

 no. 572. Probably one of the species previously found in 

 Minnesota. 



84. Collema pycnocarpum NYL. 



On trees, rare. Kettle falls, August 9, 1901, no. 1342 and 

 August 13, 1901, no. 1416. Tower, August 26, 1901, no. 1771. 



85. Collema flaccidum ACH. 



Frequent on trees and more frequent on rocks. Beaudette, 

 June 18, 1901, no. 2. Warroad, June 26, 1901, no. 190. 

 Koochiching, July 25, 1901, no. 867 and July 27, 1901, no. 

 968. Rainy Lake City, August 8, 1901, no. 1280. Harding, 

 August 19, 1901, no. 1606. Tower, August 27, 1901, no. 1829. 



86. Collema nigrescens (Huos.) ACH. 



On trees, frequent. Beaudette, June 18, 1901, no. 24. 

 Warroad, June 26, 1901, no. 179. Oak island, July 8, 1901, 

 no. 399. Emo, July 17, 1901, no. 650. Koochiching, July 

 31, 1901, no. 1031. Rainy Lake City, August 13, 1901, no. 

 1157. Kettle falls, August 9, 1901, no. 1340. Harding, 

 August 16, 1901, no. 1511 and August 17, 1901, no. 1543. 

 Tower, August 26, 1901, no. 1802. 



87. Collema nigrescens (Huos.) ACH. var. leucopepla TUCK. 

 On trees, infrequent. Beaudette, June 20, 1901, no. 67. 



Warroad, June 26, 1901, no. 189. Emo, July 18, 1901, no. 

 710. Koochiching, July 29, 1901, no. 977. Kettle falls, 

 August 9, 1901, no. 1323. Tower, August 26, 1901, no. 1815. 

 Shows the pruinose apothecia of the variety, but scarcely dif- 

 fers otherwise from the above. Not previously reported from 

 Minnesota. 



88. Collema pulposum (BERN.) NYL. 



On earth, common in last locality. Emo, July 24, 1901, no. 



