326 MINNESOTA BOTANICAL STUDIES. 



171. Arthonia dispersa (Schrad.) Nyl. 



On trees, common. Mankato, June 22, 1899, no. 25, and 

 July 23, 1899, no. 72. Granite Falls, July 13, 1899, no. 490. 



172. Arthonia radiata (Pers.) Th. Fr. 



On trees, infrequent. Mankato, June 23, 1899, no. 70. 

 Granite Falls, July 13, 1899, no. 489, and July 15, 1899, no. 

 532. 



173. Arthonia punctiformis Ach. 



On maples, rare. Granite Falls, July 15, 1899, no. 341a. 



i73«. Arthonia sp. 



On trees, rare. Granite Falls, July 15, 1899, no. 541. 



With general appearance of Arthonia dispersa (Schrad.) 



22-26 



Nvl., but the colorless spores are four celled and ^ — mic. 



^ . 7-5-8.5 



Not previously reported from Minnesota. 



174. Calicium parietinum Ach. 



On old wood, probably rare. Mankato, June 22, 1899, no. 

 8, and June 24, 1899, no. 87, Redwood Falls, July 8, 1899, no. 

 326. 



175. Calicium quercinum Pers. 



Collected once only, on cedar. Granite Falls, July 13, 1899, 

 no. 478. 



176. Coniocybe pallida (Pers.) Fr. 



On a large oak, only once collected. Mankato, July 7, 1899, 

 no. 206. 



177. Endocarpon miniatum (L.) Schaer. 



Abundant on limestone bluffs, frequent on granite and rare on 

 quartzite. Mankato, June 23, 1899 no. 46 and June 25, 1899, 

 no. 59. Redwood Falls, July 6, 1899, no. 312. Granite Falls, 

 July II, 1899, no. 373, and July 13, 1899, no. 474. Pipestone, 

 July 18, 1899, ^°- ^^^' 



178. Endocarpon miniatum (L.) Schaer. var. complicatum 

 Schaer. 



On substrata noted above and also on pipestone, frequent. 

 Mankato, June 25, 1899, no. 57. New Ulm, July 5, 1899, no. 

 249. North Redwood, July 10, 1899, no. ^,62,. Granite Falls, 

 July 12, 1899, no. 448, and July 13, 1899, no. 495. Pipestone, 

 July 18, 1899, no. 615, and July 19, 1899, "*^- ^2)9- 



