oak tree vs Quercus variabilis

Other hyponyms of oak tree include live oak, white oak, European turkey oak, Quercus cerris, turkey oak, Quercus coccinea, scarlet oak, jack oak, northern pin oak, Quercus ellipsoidalis, red oak, evergreen oak, holly-leaved oak, holm oak, holm tree, Quercus ilex, laurel oak, Quercus imbricaria, shingle oak, bluejack oak, Quercus incana, turkey oak, California black oak, Quercus kelloggii, American turkey oak, Quercus laevis, turkey oak, laurel oak, pin oak, Quercus laurifolia, overcup oak, Quercus lyrata, scrub oak, Japanese oak, Quercus grosseserrata, Quercus mongolica, chestnut oak, possum oak, Quercus nigra, water oak, Nuttall's oak, Nuttall oak, Quercus nuttalli, pin oak, Quercus palustris, swamp oak, Quercus phellos, willow oak, box white oak, brash oak, iron oak, post oak, Quercus stellata, cork oak, Quercus suber, Quercus texana, Spanish oak, Chinese cork oak, black oak, quercitron, quercitron oak, Quercus velutina, yellow oak.