Usnea fragilis Stirt.
Stirton, Scott. Natur. 6: 293. 1882
Corticolous or saxicolous, erect to pendulous, to 17 cm long, greenish grey to brown
Branching sub dichotomous to sympodial; branches non-articulate and non-inflated; main branch to 1.5 (-2) mm in diam.; lateral branch lets sparse to dense
Surface of branches annularly cracked and longitudinally fissured in basal part, apical region tuberculate
Pseudocyphellate-sorediate to pseudo-isidiate
Lower Side :
Outer part of medulla red pigmented; central axis solid, colourless, I - Medulla K-, P-. Barbatic acid present