166 



APPENDIX. 



The following additions and corrections to my list of North 

 American Lichens are here noted. 



ADDITIONS. 



Evernia intensa, Nyl., Flora, 1872 Mexico. 



Parmelia crinita v. eciliata, Nyl., Flora, 1869 Mexico. 



P. praesignis, Nyl., Flora, 1872 Mexico. 



P. colpodes V. cristulata, Nyl., Syn. p. 404 North America. 



P. tiliacea v. sublaevigata, Nyl. (P. sublaevigata Nyl.). ...... North America. 



f P. livida Tayl., Nyl., Syn. 383 New Orleans. 



P. perforata v. cetrata, Nyl., Syn. p. 378 New Orleans. 



Pliyscia setosa (Nyl.), Syn. p. 429 Mexico. 



P. obscura v. compacta, Nyl., Syn. p. 428 Arctic. 



Umbilicaria cylindrica v. Delisaei, Nyl., Scand. p. 117 Arctic. 



Sticta pallida. Hook Mexico. 



**Placodium murorum v. tegulares, Fw New England. 



P. arcticum (Kbr. Parerg. p. 63) Labrador. 



*Lecanora caesio-alba, Kbr New York. 



L. cupressi, Nyl. Flora, 1872 North America. 



L. cinerea varr. ** lacustris, Nyl. *Hoifmanni, ib North America. 



L. rhagadiosa, Ach Yellowstone. 



Rinodina sophodes varr. ** atro-cinerea (Nyl.) ** roboris (Daf.) New England. 



* R. aterrima (Kremph.) California. 



** Pertusaria leioplaca v. marginata, Nyl., En. p. 336 North America. 



P. pustulata V. schizostoma, Nyl., ib. p. 336 New England. 



P. paradoxa, Linds., W. Greenland, p. 344 Greenland. 



Thelotrema postpositum (Nyl.), N. Gr. p. 552 Louisiana. 



Stereocaulon denudatum v. caespitosulum, Nyl., Syn. p. 247. New England. 



S. strictum, Th. Fr. Ster. p. 42 Mexico. 



S. albicans, Th. Fr. Ster. p. 63 (S. nanum Ach. saltern pp.) .. . New England. 



Cladonia uncialis v. turgescens, Schaer United States. 



Heterothecium leptocheilum, Tuck. (Nyl. Antill., p. 14) ... . Mexico. 



H. chloritis (Tuck.), Nyl. N. Gr. p. 66 Southern. 



*Lecidea mamillaris (Gouan) Yellowstone. 



L. Campsteriana, Linds. 1. c, p. 358 Greenland. 



L. Vahliana, Linds. ib., p. 358 Greenland. 



Buellia discoensis (Linds.), ib. p. 356 Greenland. 



B. Egediana (Linds.), ib. p. 330 Greenland. 



B. Groenlandica (Linds.), ib. p. 351 Greenland. 



B. insignis, Nacg., Linds. 1. c, p. 355 Greenland. 



