The acorns are coming in on the Chestnut oak (quercus prinus), so we went for a walk to gather them from the trees. They begin falling from the ground now through September here in the South. Chestnut oak acorns are typically the first acorns to appear - they are also nearly the largest, about 1" long, and 3/4" wide. Since the leaves have rounded lobes, chestnut oaks are part of the white oak group, and thus the acorns are very mild - the bitter tannin taste is not as strong as those of the red oaks. I find chestnut oak acorns not quite as mild as white oak's (quercus alba - some have no taste of tannin at all) - however, they're still on the tree at this stage, and not yet ripe.
Here's a shot of the huge acorns:
Chestnut oak grows everywhere here, on the dry rocky slopes, and all have acorns - of course most are out of reach. It's fun to gather the first crop straight from the trees when they reach full size - there's no worry about something having already bored into them and spoiled the flesh.
Chestnut oak is easily identified with its large rounded teeth, or shallow rounded lobes along the leaf edges:
Along the way we couldn't help notice all the muscadines, and took some time to gather and snack on some. When they're nearly black they have a sweet bubble gum flavor, though the seeds are somewhat bitter, just like any commercial grape seed: