Cetrelia cetrarioides (Duby) W. L. Culb. & C. F. Culb.
Contr. U.S. natnl. Herb. 34: 498 (1968).
Basionym: Parmelia cetrarioides Delise, in Duby, Bot. Gall., Edn 2 (Paris) 2: 601 (1830).
Chemistry: Perlatolic acid major based on 3 specimens from Austria and Western North America (Thell et al. 1998: 314).