Usnea hirta (L.) Weber ex F.H. Wigg.

Usnea hirta (L.) Weber ex F. H. Wigg.

Prim. Fl. Holsat. (Kiliae): 91 (1780).

Basionym: Lichen hirtus L., Sp. Pl. 2: 1155 (1753).

Chemistry: Two chemical races:

Race I: Without chemical substances (Torra & Randlane 2007: 423 samples from Estonia).
Race II: Salazinic acid, + protocetraric acid (Torra & Randlane 2007: 423 samples from Estonia).