| Common name (English) | |
|---|---|
| Hyssopus officinalis | Hyssop |
| Ilex aquifolium | English holly |
| Ipomoea indica | Blue dawn flower |
| Ipomoea purpurea | Common morning-glory |
| Iris florentina | |
| Iris germanica | |
| Jacobaea maritima maritima | |
| Jasminum angulare | wild jasmine; angular jasmine |
| Jasminum azoricum | lemon-scented jasmine |
| Jasminum grandiflorum | Catalonian jasmine, Spanish jasmin |
| Jasminum mesnyi | Japanese jasmine, Primrose jasmin |
| Jasminum nudiflorum | Winter Jasmine |
| Jasminum officinale | Poet's jasmine |
| Jasminum polyanthum | |
| Justicia adhatoda | Malabar nut |
| Lapsana communis | Nippleworts |
| Lathyrus odoratus | Sweet pea |
| Lavandula angustifolia | English lavender |
| Leonotis nepetifolia | Christmas candlestick |
| Lepidium didymum |