Fink : lichen's ok the Minnesota \alley. 315 



6i. Collema furvum (Acn.) Nyl. 



On shaded rocks, infrequent. New Ulm, July 5, 1899, no. 

 283. Redwood Falls, July 6, 1899, no. 307. Granite Falls, 

 July II, 1899, no. 391. 



Not previously reported from Minnesota. 



62. Leptogium lacerum (Sw.) Fr, 



On various rocks, usually shaded, frequent. Mankato, June 

 23, 1899, no. 49. Redwood Falls, July 8, 1899, no. 328. 

 Granite Falls, July 13, 1899, nos. 480 and 497 and July 17, 

 1899, no. 568. 



6-},. Leptogium pulchellum (Ach.) Nyl. 



Collected once on a large bowlder in a shaded ravine, rare. 

 Mankato, July i, 1899, no. 212. 



Not previously reported from Minnesota. 



64. Leptogium chloromelum (Sw.) Nyl. 



On mossy, shaded sandstone, rare. Mankato (Minneopa 

 Falls), June 27, 1899, no. 144. 



65. Leptogium myochroum (Ehrh., Schaer.) Tuck. 



On trees and shaded granitic rocks, rare. Mankato, June 

 26, 1899, no. 126. Mankato (Rapidan), June 28, 1899, no. 

 166. Granite Falls, July 11, 1899, no. 392. 



66. Placodium elegans (Link.) DC. 



On various rocks ; common at Granite Falls, infrequent else- 

 where. Mankato, June 24, 1899, no. 83. Redwood Falls, 

 July 8, 1899, no. 353. Granite Falls, July 11, 1899, no. 440. 

 Pipestone, July 18, 1899, "^s. 592 and 603. 



67. Placodium murorum (Hoffm.) DC. 



On granitic rocks, rare. Granite Falls, July 12, 1899, no. 



452. 



68. Placodium cinnabarrinum (Ach.) Auz. 



On various rocks, frequent or common. Mankato, June 23, 

 1899, no. 73, and June 30, 1899, no. 200. Morton, July 7, 

 1899, no. 320. North Redwood, July 10, 1899, "'^- 3^9- Gran- 

 ite Falls July 11, 1899, "°- 4^^- Pipestone, July 18, 1899, 

 no. 607. 



69. Placodium aurantiacum (Lightf.) Naeg. and He pp. 



On trees and rocks, common at first locality. Mankato, 

 June 22, 1899, no. 19, and June 23, 1899. no. 38. Granite 

 Falls, July 11, 1899, no. 375. 



