| Common name: | Square-stalked St John’s-wort |
| Latin name: | Hypericum tetrapterum |
| Family: | St John’s-wort (Clusiaceae) |
| Flowers: | June to September |
| This photo | |
| Date: | 9 July |
| Location: | garden, Marsland valley, Cornwall |
| Other photos | |
| Gallery: | British Wild Flowers |
| Related images: |