Blackberry
The one everyone knows. Thorny, abundant, and almost impossible to get wrong.
Rubus fruticosus — the free berry
Blackberries are the entry drug of foraging. They're everywhere, they're unmistakable, and they're at their best in the one month of the year when everything else is winding down.
How to pick
season late aug → early oct look for plump, deep black, falls off with a tug leave red ones (they won't ripen off the cane) watch out thorns, and the low, dog-height berries
Why they matter
A full bramble is calories for free, and the flavour beats anything from a shop. Eat them raw, or let them become a crumble.