Prickly pear cactus
The pads (nopales) and the red fruit (tunas) are both edible - mind the tiny spines.
Foraging / Wild food
Texas grows a generous wild pantry. Here are a few classics, how to gather them legally and ethically, and the plants you must leave in the ground.
The pads (nopales) and the red fruit (tunas) are both edible - mind the tiny spines.
The bean pods can be dried and ground into a sweet flour.
Spring roadsides and fencerows, all over the state.
Wild pecans drop across much of Texas - it's the state tree.
Tart red berries from a spiny, barberry-family shrub (the leaves look holly-ish but it isn't a holly).
Wild onion and garlic, wood sorrel, and many overlooked plants are edible in small amounts.
The rules come from the land map: ask on private land, use the national-forest allowances on forest land, take nothing in state or national parks, and on roadsides pick the above-ground parts only - never dig up the plant.
What you can't dig
Not every plant is fair game, even where foraging is allowed.
Endangered cacti: Several Texas cacti are endangered - the star cactus, black lace cactus, and Tobusch fishhook cactus among them.
The rule: Taking a protected plant from public land is illegal, and selling wild-dug protected plants is illegal anywhere. Texas has a real problem with cactus and agave poaching for the houseplant trade - it wipes out slow-growing wild populations. Beyond the law, digging wild plants is just bad practice.
For your yard: Want natives for your yard? Buy them from a nursery that grows them - never dig them from the wild.
Official sources
Plant identification comes from the Lady Bird Johnson Wildflower Center and Texas A&M AgriLife; protected-plant listings come from TPWD and USFWS. Where you may gather comes from the land map.
Caution: Never eat a wild plant unless you're certain it's safe and legal to gather where you are. Protected-species lists change - confirm before you dig anything.