Henssen, A/ Renner, B 1981: Studies in the lichen genus Psoroma I. Psoroma tenue and Psoroma cinnamomeum. - Mycotaxon13: 433-449. [RLL List # 112-31 / Rec.# 8296] Keywords: PSOROMA/ NEW TAXA/ TUNDRA/ PANNARIC/ PORPHYRILIC
Abstract: 6 figures. [New: Psoroma tenue Henssen, sp. nov. and P. tenue var. borealis Henssen, var. nov. The new species is found associated with snowbanks, glacial till and tundra heath. "The lichen contains porphyrilic acid methyl ester and pannaric acid." It is related to Psoroma cinnamomeum and belongs to the Psoroma hypnorum group.]