About
Dwarf St. John's wort is a small, much-branched herb of wet ground in eastern North America, spread elsewhere probably by wading birds.
Care at a glance
- Pet safety
- Not recorded. We have no source on whether this plant is safe for cats, dogs or other pets — that is not the same as safe. Keep it out of reach until you have checked.
- People
- Not recorded.
- Soil
- Moist soil with pH 4.8–7.2.
Field notes
Morphology
An annual or perennial 15–60 cm tall, erect or sprawling, often with about ten pairs of branches. Papery oval leaves 0.5–2.7 cm long are covered in tiny glands. Flowers are tiny, in compound cymes.
Distribution & habitat
Native from southeast Manitoba and Ontario to Newfoundland, south to Florida and west to Texas, in ditches, marshes and shorelines. Introduced in France, Italy and Central and South America.
Ecology
Seeds stick to wading birds, whose migrations probably carried the species to Central and South America.
History & etymology
Most closely related to H. gymnanthum, differing in leaf and sepal shape and smaller flowers.
Habitat
- Altitude
- Not recorded
- Altitude class
- —
- Native to
- Canada, United States
Cultivation
- Difficulty
- Not recorded
Text adapted from Wikipedia, CC BY-SA 4.0.
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