Southern yellow loosestrife (Lysimachia tonsa)
Same genus
- Scarlet pimpernel (Lysimachia arvensis)
- Chaffweed (Lysimachia minima)
- Bog pimpernel (Lysimachia tenella)
- Sea-milkwort (Lysimachia maritima)
- Roughleaf yellow loosestrife (Lysimachia asperulifolia)
- Gooseneck yellow loosestrife (Lysimachia clethroides)
- Fraser's yellow loosestrife (Lysimachia fraseri)
- Grassleaf yellow loosestrife (Lysimachia graminea)