Mycologia 21, 5: 252 (1929).

Synonyms: Index Fungorum

Protolog: Data lacking.

Type locality: USA, California, Short Hairs Valley, Kingsriver, 1877, G. Eisen (U - holotype).

Barcode: Data lacking.

Coordinates: Data lacking.

Thallus: indeterminate covering areas of at least several cm, squamules unequally sized 0.3-1(-1.5) mm broad, 0.3-0.5(-0.7) mm thick, angular or difform, even sublobate, smooth, with appressed or rarely free edges, usually distinctly gomphate. No reaction with KOH or CaCl2O2. - Upper cortex 40-70(-85) µm thick, exterior half or two-third greenish yellow inspersed, opaque, with no or very thin amorphous stratum, lumina distinct already in water, often so even in the coloured part, in HCl very distinct 2.5-3.5 µm, thin-walled. Gonidia 7-14 µm in diam., in a dense unbroken 85-120(-200) µm thick stratum with even upper surface. Medulla usually transparent or occasionally milk-white from a not-granular stuff, dissolving in KOH but not in HCl, up to 300 µm thick). Hyphae somewhat loosely intricate or partly more densely, distinctly thin-walled, 2.5-3.5 µm thick, with cylindric 6-7 x 2 µm large or more or less rounded cells. Lower side with a continuation of the upper cortex, 15-25 µm thick, most part dark brown or occasionally pale. ... (Magnusson 1929: 75).

Photobiont: Green alga.

Chemistry: No lichen substances.

Ecology: Data lacking.

Molecular data: Genbank

Distribution: Database

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