Ann. Sci. Nat., Bot., Ser. 4, 11: 236 (1859).
Note: Elix & McCarthy (1998: 63) cite the species as Cladonia angustata (Nyl.) Nyl. and cite as Basionym Cladonia cornucopioides var. angustata Nyl. and the publications Nylander (1858: 96) and (1859: 236).