226 MINNESOTA BOTANICAL STUDIES. 



228. Biatora rubella (EHRH.) RABENH. 



On trees, common. Beaudette, June 20, 1901, nos. 78 and 

 80. Warroad, June 26, 1901, no. 197, June 27, 1901, no. 221, 

 June 28, 1901, no. 238 and July 2, 1901, nos. 324 and 326. 

 Oak island, July 9, 1901, no. 457 and July 10, 1901, no. 494. 

 Flag island, July 12, 1901, no. 545. Koochiching, July 26, 

 1901, no. 892 and June 29, 1901, no. 981. Rainy Lake City, 

 August 3, 1901, no. 1151. Kettle falls, August 13, 1901, no. 

 1430 and August 14, 1901, no. 1475. Harding, August 16, 

 1901, nos. 1498 and 1516. 



229. Biatora atrosanguinea SCHAER. 



On trees, frequent. Warroad, July 2, 1901, no. 326. 

 Not previously reported from Minnesota and new to North 

 America. 



230. Biatora fuscorubella (HOFFM.) TUCK. 



On trees, common on cedars in swamps. Beaudette, June 

 20, 1901, no. 72 and June 22, 1901, no. 116. Warroad, June 

 29, 1901, nos. 264 and 284, and July i, 1901, nos. 301 and 303. 

 Oak island, July 8, 1901, no. 400. Emo, July 18, 1901, nos. 

 707 and 708, July 18, 1901, no. 712 and July 23, 1901, no. 842. 

 Koochiching, July 30, 1901, no. 1017. Tower, August 26, 

 1901, no. 1770. 



231. Biatora schweinitzii FR. 



On cedars in swamps, infrequent. Oak island, July 9, 1901, 

 no. 463. Harding, August 19, 1901, no. 1574. 



Thallus, apothecia and spores unusually well developed in the 

 first collection. 



232. Biatora atrogrisea (DELIS.) HEPP. 



On trees, rare. Warroad, June 28, 1901, no. 224 and July 

 2, 1901, no. 331. 



233. Biatora inundata FR. 



On rocks by water, rare. Tower, August 28, 1901, no. 1861. 



234. Biatora akompsa TUCK. 



On cedars in swamps, rare. Warroad, June 29, 1901, no. 

 261. Emo, July 18, 1901, no. 722. 



235. Biatora umbrina (Acn.)TucK. ? 



On cedars in swamps, rare. Warroad, July 2, 1901, no. 334. 

 Spores larger than usual. 



