Phytologia 28, 5: 480 (1974).
Basionym: Parmelia coronata Fée, Essai Crypt. Exot. (Paris): 123 (1825) [1824].
Thallus: 3-6 cm in diameter; lobes sublinear-elongate, crowded, 0,5- 2 mm wide; bulbate cilia distinct; upper surface plane to rugulose, continuousto faintly maculate, cracked on older lobes; lower surface black, moderately rhizinate, the rhizines moderately to densely branched. Apothecia adnate, 1-3 mm i diameter, the exiple coronate; spores 8, 5 X 6-8 µm (Hale xxx).
Photobiont: Data lacking.
Chemistry: Medulla K-, C+ rose, KC+ red, P-, atranorin and gyrophoric acid (Hale xxx). Upper cortex KOH+ yellow, Ca (OCl)2-, p-phenylendiamine-; medulla KOH-. Ca (OCl)2+ red, p-phenylendiamine-. Substances: gyrophoric acid (see photograph of the crystals of this substance in Culberson and Culberson, 1956); probably also atranorin (upper cortex KOH+ yellow) (W. L. Culberson 1961: 169).
Ecology: Closely adnate on bark. On trunks and branches of trees in semi-arid woodlands up to 2300 m elevation (Hale xxx).
Distribution Type: Subtropical and tropical New World, South Africa.
Note: This was the first species described in the genus and the marginal bulbate cilia were recognized by Fée when he used the epithet glandulifera. It occurs in the New World with a disjunct locality in South Africa. No vegetative morphs have been discovered.The only confusable species, B. bicornuta, B. schiffneri, and B. semilunata, are all distinguished by bicornute spores (Hale xxx).
There is a detailled description by Lynge (1914).