For a detailed description, see
Clerc (1997, 2007),
Halonen et al. (1998) and
Herrera-Campos et al. (1998) (also under the name
U. hesperina). Thallus pendulous; base pale; branches even in thickness, slendering evenly towards the apices, without foveolae and/or ridges; distinctly segmented by annular cracks close to the base; fibrils present, often long and curved, sparse to abundant; papillae absent; soralia present, punctiform, slightly tuberculate, mostly immature and resembling pseudocyphellae; isidiomorphs small, on young soralia only. Cortex mat, relatively thick; medulla thin and compact; central axis thick.
