Hypoxylon macrocarpum Pouz. spec. nov. differs from closely related Hypoxylon fuscum (Pers. ex Hook.) Fr. by larger perithecia, better developed waxy (resinous) layer which is lustrous, and a heavy sweetish smell. It prefers wood of Acer, Ulmus, Fraxinus, occasionally growing also on Carpinus and Fagus. It is known from 8 localities in Czechoslovakia and one in Poland.
Pouzar Z. (1978): Hypoxylon macrocarpum Pouz. spec. nov., a new fragrant pyrenomycete. – Česká Mykologie 32(1): 19–21.