Klotsch, “Flora Borussica,” t. 374; Smith, in “Seem. Journ. Bot.” (1869), t. 95, f. 1–4.
Krombholz, “Abbildungen der Schwämme,” pl. 41, f. 1–7.
Tratinnick, L., “Fungi Austriaci,” p. 47, pl. 4, f. 8.
Vittadini, “Fungi Mangerecci,” pl. 23.
Cooke, in “Journal of Botany,” vol. viii. p. 352.