Nummularia
noun
Num·mu·la·ria
ˌnəmyəˈla(a)rēə
: a genus of mostly saprophytic fungi (family Xylariaceae) forming generally amorphous crustose round or discoid black stromata see blister canker
Word History
Etymology
New Latin, from Latin nummulus, diminutive of nummus coin + New Latin -aria