Figure 16.—Western poison-oak growing alongside roadside. This rank shrubby growth is typical for most localities.
Figure 17.—Western poison-oak, showing common leaf types: A, Leaves with thick leathery appearance; B, leaves irregular in shape with much-curled or distorted surfaces; C, branch, with
In open pasture fields western poison-oak usually grows in spreading clumps from a few feet to several feet tall (figs. [14] and [16]). Where it develops extensively it greatly reduces the area for grazing and becomes a serious menace to most people who frequent the area or attend cattle that come in contact with the plants while grazing.
