The other day I went on a tarantula trek in Mt. Diablo State Park and in addition to seeing tarantulas and scorpions, we also learned about poison oak. I’ve heard a lot about poison oak but never definitively encountered any until our guide helpfully pointed it out. Take a good look at the above photo. That is definitely poison oak.
According to Wikipedia:
The leaves are divided into three (rarely 5, 7, or 9) leaflets, 3.5 to 10 centimeters (1.4 to 3.9 in) long, with scalloped, toothed, or lobed edges. They generally resemble the lobed leaves of a true oak, though tend to be more glossy. Leaves are typically bronze when first unfolding in February to March, bright green in the spring, yellow-green to reddish in the summer, and bright red or pink from late July to October.
Unlike tarantulas, which are harmless to humans, poison oak, “causes itching; then evolves into dermatitis with inflammation, colorless bumps, severe itching, and blistering”. So stay away from poison oak, and remember these photos to remind you what to look out for.
