| Square-stalked St John's-wort | St John's-wort family |
| Hypericum tetrapterum | Clusiaceae/Guttiferae (Hypericaceae) |
Square-stalked St John's-wort has a square reddish stem with winged corners, oval leaves with small translucent dots, paler yellow flowers without dots, and narrow pointed sepals.
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| Leaves, showing translucent dots | Square winged stems | Narrow pointed sepals |