Usnea in Europe  http://www.ut.ee/ial5/k2n/
key/usnea_eu/index.html
  • Usnea subcornuta, thallus
  • Usnea subcornuta, base
  • Usnea subcornuta, branch
  • Usnea subcornuta, soralia
  • Usnea subcornuta, medulla