The shirt reads: “ALL PLANTS ARE EDIBLE” above and “SOME ONLY ONCE” below.
Between the banners, a skull sits in a dense arrangement of fly agaric mushrooms, foxgloves, datura flowers, berries and a poison bottle, drawn as a botanical plate.
The plants shown are genuinely dangerous ones and they are drawn accurately enough to identify. That accuracy is what makes the joke land rather than float.
For foragers, botanists, and anyone whose hobby requires actually knowing the difference.
