Cladon. Exs. 1847 (1929).

Type locality: USA, North Carolina ("N. Virg."), Mecklenburg Co., Charlotte, Long Creek, 1928, F. W. Gray in Sandstede: Cladon. Exs. 1847 (FH - lectotype; B, FH, FH-Dodge, LE, S, TUR-V, UPS - isolectotypes). Lectotypification by Ahti (1993: 79).

Chemistry:
Race I: Fumarprotocetraric acid chemotype (Hodkinson et al. 2009: 70).
Race II: Without fumarprotocetraric acid (Hodkinson et al. 2009: 70).