Thallus foliose, upper surface pale yellow, with sparse isidia; lobes 1-3 mm wide, convex, prolonged, ascending at the apices, dichotomously branched; lower surface brown to almost black, strongly rugulose, with sparse rhizines (to 0.3 mm long) and a few marginal pseudocyphellae. Upper cortex palisade plectenchymatic, c.10 µm thick; medulla 100-150 µm thick, pale yellow to yellow-ochre; lower cortex pachydermatous paraplectenchymatic, 5-9 µm thick.
Apothecia rare, laminal, c.4 mm in diameter; ascospores not seen.
Chemistry
Usnic acid (trace) in the cortex; secalonic acid A and the related yellow pigments in the medulla.
Remarks
The species is known only from the type collection, China.
Literature:
Randlane, T. & Saag, A. 1993. | Randlane, T. & Saag, A. 2004. | Randlane, T., Saag, A. & Obermayer, W. 2001. | Randlane, T., Saag, A. & Thell, A. 1997. | Thell, A., Randlane, T., Kärnefelt, I., Gao, X. & Saag, A. 1995. Contact
