Phytologia 28, 5: 480 (1974).

Basionym: Parmelia atrichella Nyl., Flora, Regensburg 68: 614 (1885).

Type locality: Colombia, Lindig 110 (H-NYL 35233 - lectotype; FH, BM, M - isolectotypes).

Thallus: foliose, closely adnate, light mineral gray, turning olive-buff in the herbarium, 3 - 6 cm in diameter; lobes sublinear-elongate, 0,5 - 2 cm wide, the margins densely bulbate, sometimes lobulate; upper surface plane, shiny, maculate; lower surface black, densely rhizinate, the rhizines densely branched. Apothecia adnate, 1 - 2,5 mm in diameter, the disc carob brown, ecoronate; spores 8,5 X 7-8 µm. Pycnidia unknown.

Chemistry: Cortex K+ yellow, medulla K-, C+ rose, KC+ red, P-, atranorin and gyrophoric acid.

Ecology: On bark of trees in open forest at about 2000m elevation.

Distribution type: Colombia and Peru.

Taxonomy: This species is known from only two collections. It is very close to B. coronata but lacks coronate apothecia.The upper surface is rather distinctly maculate and the thallus color more olivaceous than in Bulbothrix coronata. Bulbothrix goebelii may well be the isidiate morph.