Frost: SOME MINNESOTA LICHENS. 83 



1\. Parmelia perlata (Linn.) AcH. Meth. 216. 1803. 



On Quercus macrocarpa MiCHX. Litchfield, Meeker 

 county (TF. D. F., June, 1892); near Mille Lacs lake 

 {E. P. Sheldon, July, 1892). 



15. Parmelia tiliacea (Hoffm.) Ach. Meth. 215. 1803. 



On Pinus strdbus Linn. Mille Lacs Indian reservation 



{E. P. Sheldon, July, 1892). 

 On Quercvs macrocarpa MiCHX. near Mille Lacs lake 



and at Garrison, Crow Wing county {E. P. Sheldon, 



1892). 



16. Parmelia borreri Turn. Linn. Trans. 9: 148. 1808. 



On trees, Lake Harriet, Minneapolis ( W. D. F., April, 

 1892); Litchfield ( TF. D. F., June, 1892). 



Pn Acer saccharinum Linn. Mille Lacs Indian reserva- 

 tion {E. P. Sheldon, July, 1892). 



17. Parmelia olivacea (Linn ) Ach. Meth. 213. 1803. 



On trees, Minnehaha Falls {E. P. Sheldon, Oct., 1892). 



18. Physciaspeciosa(WuLF.) Fr. L. E. 80. 1831. 



On Quercus macrocarpa MiCHX. Spicer. Kandiyohi 

 county, ( W. D. F., Aug., 1892). 



19. Physcia hypoleuca (Muhl. ) Tuckerm. Syn. N. Am. L. 



68. 1882. 

 On trees. Litchfield, Meeker county, ( TF. D. F., June, 

 1892). 



20. Physcia stellaris (Linn.) Fr. L. E. 82. 1831. 



On twigs of Tilia americana Linn. Litchfield, Meeker 

 county, ( TF. D. F., June, 1892); Spicer. Kandiyohi 

 county, (TF. D. F., Aug., 1892), On Quercus velutina 

 Lam. Garrison, Crow Wing county, {E. P. Sheldon, 

 June, 1892). 



21. Physcia obscura (Ehrh.) Nyl. Prodr. 63. 1857. 



On Populus tremuloides Michx, near Minneapolis, {E. P. 

 Sheldon, May, 1890). Waseca, Waseca county, {E. P. 

 Sheldon, July, 1891). Litchfield, Meeker county, (TF. 

 B.F., June, 1892). Osceola, Wis., {Miss Jessie Elwell, 

 Sept., 1892). 



Physcia adglutiuata(PLOERK.) Nyl. Syn. 1:428. 1860. 



On Quercus macrocarpa Michx. Spicer. Kandiyohi 



county, (TF. D. F., Aug., 1892). On Acer, saccharinum 



Linn. Mille Lacs Indian Reservation. {E. P. Sheldon, 



June, 1892). 



99 



