Fink: LICHENS OF THE NORTHERN BOUNDARY. 207 



August 15, 1901, no. 1585. Tower, August 28, 1901, no. 

 1849. 



96. Placodium murorum (Hoffm.) DC. 



On rocks, rare. Rainy Lake City, August 5, 1901, no. 1192. 



97. Placodium cinnabarium (Ach.) Anz. 



On rocks, infrequent. Oak island, July 15, 1901, no. 617. 

 Emo, July 22, 1901, no. 809. Koochiching, July 27, 1901, 

 no. 963. Rainy Lake City, August 1, 1901, no. 1063. Tower, 

 August 24, 1901, no. 1746. 



98. Placodium citrinum (Hoffm.) Leight. 



On rocks, common and fruited at Harding, elsewhere rare 

 and sterile. Rainy Lake City, August 7, 1901, no. 1244. 

 Harding, August 20, 1901, no. 1616. Tower, August 23, 

 1901, no. 1711. 



99. Placodium aurantiacum (Light.) Naeg. and Hepp. 



On rocks, infrequent. Le Clair, July 6, 1901, no. 380. Oak 

 island, July 15, 1901, no. 624. Rainy Lake City, August 16, 

 1901, no. 1232. Kettle falls, August 14, 1901, no. 1478. 

 Tower, August 27, 1901, no. 1843. 



100. Placodium cerinum (Hedw.) Naeg. and Hepp. 



On trees, common. Beaudette, June 21, 1901, no. 88. War- 

 road, June 25, 1 901, no. 150, June 26, 1901, no. 184 and June 

 29, 1901, no. 279. Oak island, July 10, 1901, no. 512. Flag 

 island, July 12, 1901, no. 551. Emo, July 18, 1901, no. 698. 

 Koochiching, July 26, 1901, no. 893 and July 31, 1901, no. 

 1027. Rainy Lake City, August 8, 1901, no. 1299. Harding, 

 August 19, 1901, no. 1581. Tower, August 23, 1901, no. 

 1692 and August 24, 1901, nos. 1731 and 1739. 



101. Placodium cerinum (Hedw.) Naeg. and Hepp. var. sider- 

 itis Tuck. 



On rocks, infrequent. Emo, July 20, 1901, no. 787. Kooch- 

 iching, July 26, 1901, no. 909, and July 31, 1901, no. 1043. 

 Rainy Lake City, August 1, 1901, nos. 1064 and 1075. 

 Tower, August 24, 1901, no. 1749 an( ^ August 28, 1901, no. 

 1848. 



102. Placodium cerinum (Hedw.) Naeg. and Hepp. var. pyra- 

 cea Nyl. 



On old wood, rare. Beaudette, June 20, 1901, no. 76. 

 Koochiching, July 29, 1901, no. 976. Rainy Lake City, Au- 

 gust 6, 1901, no. 1231. Harding, August 20, 1901, no. 1621. 



