Shining Netvein Barberry (Berberis aquifolium var. dictyota)
Notice the pointy bits on the tips of the leaves? Sit on a barberry plant and you'll soon repent. Shining Netvein Barberry is an evergreen, so those spikes stand sentry year round.
This Photo: Above the Fresno River between Oakhurst and Ahwahnee, mid April