Basionym Name:Collema flaccidum var. coerulescens C. Bab., in Hooker, Bot. Antarct. Voy. Erebus Terror 1839-1843, II, Fl. Nov.-Zeal.: 309 (1855)
Homotypic synonyms:Collema rupestre var. coerulescens (C. Bab.) Zahlbr., Cat. Lich. Univers. 3: 60 (1924)Synechoblastus flaccidus var. coerulescens (C. Bab.) Müll. Arg., Bull. Herb. Boissier 2(app. 1): 19 (1894)