Valonia

(ya-lo' '-ne-ak). The commercial name for the acorn-cups of several species of oak (Quercus cegilops and Q. macro lep is) coming from Asia Minor, Roumelia, and Greece. They are of a bright-drab color and contain 25 to 35 per cent, of a tannin somewhat resembling that of oak-bark, but giving a browner color and a heavier bloom. They are generally used in admixture with oak-bark, myrobalans, or mimosa-bark, because of themselves, they produce too brittle a leather.