718 MINNESOTA BOTANICAL STUDIES. 



24. Physcia hypoleuca (Muhl.) Tuck. 

 On trees, rare. July 4, 1896, no. 86. 



25. Physcia grauulifera (Ach.) Tuck. 

 On trees, frequent. July 4, 1896, no. 95. 

 Not previously reported from Minnesota. 



26. Physcia pulverulenta (Schreb.) Nyl. 

 On wood, frequent. July 4, 1896, no. 81a. 



27. Physcia stellaris (L.) Tuck. 



On trees, abundant. June 25, 1896, no. 23. 



28. Physcia stellaris (L.) Tuck. var. apiola Nyl. 

 On granitic rocks, rare. July 9, 1896, no. 134. 

 Not previously reported from Minnesota. 



29. Physcia tribacia (Ach. ) Tuck. 



On trees near the base, infrequent. June 28, 1896, no. 41. 



30. Physcia caesia (Hoffm.) Nyl. 



On granitic rocks, infrequent. July 3, 1896, no. 72. 



31. Physcia obscura (Ehrh.) Nyl. 



On trees, frequent. July 4, 1896, no. 75. 



32. Physcia aclglutinata (Floerk.)Nyl. 

 On trees, frequent. July 4, 1896, no. 90. 



33. Peltigera polydactyla (Neck. ) Hoffm. 

 On earth, rare. Aug. 16, 1896, no. 226. 



34. Peltigera pulverulenta (Tayl.)Nyl. 



On earth, infrequent. June 30, 1896, no. 39. 

 Not previously reported from Minnesota. 



35. Peltigera rufescens (Neck.) Hoffm. 



On earth, infrequent. June 30, 1896, no. 40. 

 Not previously reported from Minnesota. 



36. Peltigera canina (L.) Hoffm. 



On earth, very common. June 30, 1896, no. 44. 



37. Peltigera canina (L.) Hoffm. var. spuria Ach. 

 On earth, frequent. July 9, 1896, no. 124. 



38. Peltigera canina (L.) Hoffm var. sorediata Sch.er. 



On earth and Saint Peter sandstone, frequent. July 9, 1896, 

 no. 142; July 14, 1896, no. 165. 



See note under no. 28 of first paper of this series. 



But the plant from the sandstone shows scarcely fibrillose 

 forms like var. spuria Ach. except for the soredia. 



