Thallus:  Foliose, consisting of narrow flattened branches; the branches 0. 5-2.0 mm (. 02-.08  m)  across, tightly attached to the bark.  Upper surface of branches smooth, dull, greenish-gray to whitish when dry; similarly colored when wet. Lower surface similar in color to the top.  The tips of the branches are sometimes bulged upward like the back of a fist and have conspicuous curved, branched hairs (Fig. B). The hairs are light colored when young, but may become dark. 

Apothecia:  (Fig. A)  Uncommon, except on older thalli;  small, 0.5-1.0 mm (.02-.04 in) across; brown, with a whitish thalline margin.

Soredia:  Usually present on older branches, located on the underside of the tips of branches (Fig. B).

Isidia:  Lacking.

Comments:  This is a small foliose lichen with slender branches.  It is distinguished by the curved, branched hairs projecting from the tips of the branches and by the soredia on the underside of the tips of branches.