Fl. Berol. Prodr.: 363 (1787).

Basionym: Lichen gracilis L., Sp. Pl.: 1152 (1753).

Type locality: Unknown. Dillenius, Hist. Musc.: t. 14, f. 3 (1742). Typotype: Herb. Dillenius (OXF). Lectotypification by Ahti (1993: 79).

Note: There are 5 subspecies: Cladonia gracilis subsp. elongata (Wulfen) Vain., Acta Soc. Fauna Fl. Fenn. 53, 1: 92 (1922). Basionym: Lichen elongatus Wulfen in Jacquin, Misc. Austriac. 2: 368 (1781). Chile, Magallanes, Baie de Bougainville, monts de Commerson, 1767, P. Commerson s.n. (PC - lectotype; C?, PC? - isolectotype). Lectotypification by Ahti (1980).
Cladonia gracilis subsp. xxx