Swamp lousewort is a threatened plant in Connecticut. Swamp lousewort can be confused with a related plant, wood betony. Swamp lousewort, however, is a taller, more upright plant, and its leaves have no stalk or only a very short stalk.
- Family: broomrape (Orobanchaceae)
- Habitat: wet meadows, shores, swamps; generally in limestone soil
- Height: 1-2 feet
- Flower size: 3/4 inch long
- Flower color: yellow
- Flowering time: August to September
- Origin: native