quernus — Lewis & Short
quernus, a, um, adj.quercus; cf. querneus,
I of oaks, oaken, oak- (poet.):
quernas glandes tum stringere tempus,Verg. G. 1, 305:
vimen,id. A. 11, 65:
stipes,Ov. F. 4, 333:
corona,a garland of oak-leaves, id. Tr. 3, 1, 36.