Among St. Johnsworts, this species is dwarf not in plant size, but in flower size. Canadian St. Johnswort also has tiny flowers, but its leaves are long and skinny; dwarf St. Johnswort has the oval leaves typical of St. Johnsworts.
- Family: St. Johnswort (Hypericaceae)
- Habitat: wet ground, streambanks
- Height: 1-3 feet
- Flower size: less than 1/4 inch
- Flower color: yellow to yellow-orange
- Flowering time: July to September
- Origin: native