Meddn Soc. Fauna Flora fenn. 48: 173 (1925) [1924].

Basyonym: Usnea barbata var. glabrescens Nyl. ex Vain., Meddn Soc. Fauna Flora Fenn. 2: 46 (1878).

Chemistry: Data lacking.
Race I: Usnic acid, norstictic acid (Carlin 1986: 30, 25 samples from Sweden)
Race II: Usnic acid, stictic acid, norstictic acid, constictic acid (Carlin 1986: 30, 3 samples from Sweden)