Preliminary identification for CNC 2024: Interior Live Oak (Quercus wislizenii). Photographed along the Laguna Creek Trail, about a quarter of a mile from its staging area on Waterman Road in Elk Grove, CA.
Had slight cupping before preservation (see 2nd photo), and dense pubescence adaxialy and abaxialy. Might be Q. durata x garryana. Date is a little off
In the woods: on the W/SW slope/toe-slope of Walker Mountain. Twigs tomentose, leaf petiole less than 5mm, leaves convex, puberulent, short-hairy abaxially, margin wavy, inrolled, toothed (from Jepson). Does not key from Flora of Oregon, as it isn't Q chrysolepis or vaccinifolia. It reminded of oaks I saw in Lake/Colusa County, CA, so I grabbed a sample. In an area with a 'unique' flora.
Nearby individual as previous ob as this species, in all ways identical.
Best guess due to green undersides of leaves and 5+ lateral veins per leaf.