Swinscow, TDV/ Krog, H 1979: The fruticose species of Usnea subgenus Usnea in East Africa. - Lichenologist11: 207-252. [RLL List # 105-86 / Rec.# 18084] Keywords: AFRICA/ USNEA/ NEW TAXA/ KEY
Abstract: 15 tables. 20 figures. [Recognition of 23 species; keys. New: Usnea nodulosa sp. nov., U. sanguinea sp. nov., U. subeciliata (Mot.) comb. nov. Many taxa are reduced to synonymy.]