Thallus crustose, leprose, with powdery to partly membranous appearance; whitish grey to pale bluish grey; thin, c. 100 µm, central parts soft, loose and raised from the substrate at the margin attached to the substrate; margin delimited, with raised and thickened irregularly indented rim that is composed of clumped granules, present at least when young, weakly developed if compared to e.g. L. membranacea or L. sipmaniana, sometimes small and indistinct lobes present, up to 0.5 mm wide, without raised rims; cortex absent; medulla present, thin to medium, whitish; lower surface smooth, white, without conspicuous weft of hyphae; areoles absent; squamules absent; patches in central parts without well defined granules present, soredia abundant to sparse in places, medium to coarse, 80-140 µm in diam.; projecting hyphae usually present, abundant, very short, 10-20 µm, some granules with tufts of longer hyphae to 60 µm; very short projecting hyphae give the soredia pruinose appearance; often soredia not separated from each-other, creating minutely warted surface appearance; isidia-like structures absent. Photobiont trebouxioid, cells 12-18 x 8-14 µm.
