dis; orbillig concoloribus margine tenui inflexo nudo integro.’’ 
le. 
Type in the Acharian Herbarium, Helsingfors. 
28. Usnea variegata Strt. 
“Niagara Falls.’’ (Scot. Nat. 6: 105. 1881.) 
““Thallus cinereo-glaucescens, cinereo-virescens vel cin- 
ereus, gracilis, elongatus, pendulus, fibrillosus; axis centralis 
fusco-rufescens (praesertim stipitum) crassiusculus; fibrillae 
medullaris (kK— vel vix tinctae), eae axin tegentes I caerules- 
centes dein violaceae.’’ I. ¢. 
22 
