The
thallus is crustose and grows on bark, forming a continuous patch up to about across. It is very pale olive-yellow and uneven to coarsely bumpy, with
gall-forming bumps about in diameter. In cross section, the thallus has a thick, cartilage-like , while the and thick
medulla are immersed in the modified outer bark. The perithecia are aggregated, with about five to ten fruiting bodies completely immersed in irregular to linear pseudostromata. These pseudostromata are typically about long and wide, often uneven and frequently merging with one another. They are usually covered by a whitish surface layer and may develop on the thallus galls. The
ostioles are lateral and fused, with one to several shared openings that are , brownish, and about 0.05–0.10 mm wide. Individual perithecia are pear-shaped and arranged laterally, with ostiolar channels that are irregularly oriented and fused; they are about 0.3–0.5 mm wide and up to 1 mm long. The is dark brown to weakly and about 20–30 μm thick, and the space between perithecia is filled with amorphous orange-brown tissue. The consists of densely interwoven, net-like
paraphyses in a clear gelatinous matrix (IKI−); the upper and the ostiolar channel are strongly . The ascospores are
hyaline and occur one or two per ascus. They are oblong-
ellipsoid, densely , and have a distinct median constriction and a thick outer wall, measuring about 150–200 × 50–60 µm (IKI−). The thallus and pseudostromata contain
lichexanthone and
fluoresce yellow under
ultraviolet light (UV+ yellow). ==Habitat and distribution==