Homotypic Synonyms See Note

Basionym Name:
Lichen debilis Sm., in Smith & Sowerby, Engl. Bot. 35: [2462] (1813)

Homotypic synonyms:
Calicium debile (Sm.) Schaer., Naturwiss. Anzeiger Allgem. Schweizer. Gesellsch. Naturwiss. 5: 36 (1821)
Calicium subtile var. debile (Sm.) Fr., Summa veg. Scand., Sectio Prior (Stockholm): 118 (1845)
Chaenothecopsis debilis (Sm.) Tibell, Symb. bot. upsal. 21(no. 2): 45 (1975)
Strongylium debile (Sm.) Gray, Nat. Arr. Brit. Pl. (London) 1: 485 (1821)