Euphorbia helioscopia
From LSJ
Ἔνιοι κακῶς φρονοῦσι πράττοντες καλῶς → Multi bonis in rebus haud sapiunt bene → Trotz ihres Wohlergehens denken manche schlecht
Wikipedia EN
Euphorbia helioscopia, the sun spurge or madwoman's milk, is a species of flowering plant in the spurge family Euphorbiaceae. It is a herbaceous annual plant, native to most of Europe, northern Africa, and eastward through most of Asia. Additional folk names include wart spurge, summer spurge, umbrella milkweed, and wolf's-milk.