Intermingled with the pines were shorter, ragged-looking trees with lumpy trunks, wizened branches and fine twigs like gnarled fingers: Betula pubescens, downy birch.
Betula occidentalis , the only birch, is a small, slender tree restricted to the eastern flank of the range along stream-sides below the pine-belt, especially in Owen's Valley.
Betula occidentalis 是唯一白,是一种细长,仅限于松带下方沿溪流两侧分布东侧,尤其是在欧文谷。