About
Scouler's St. John's wort is a native herb of streamsides and wetlands in western North America, sometimes confused with the invasive common St. John's wort.
Field notes
Morphology
Stems 5–66 cm tall, occasionally 80 cm, rise from a creeping rootstock and lack black glands. Opposite leaves vary from ovate to elliptic.
Distribution & habitat
Southern British Columbia and Alberta through the western United States to the Rocky Mountain states and the highlands of central Mexico.
Ecology
The klamathweed beetle, released to control common St. John's wort, can complete its life cycle on this species in the laboratory but has not been reported feeding on it in the wild.
History & etymology
Described by William Jackson Hooker in 1831.
Habitat
- Altitude
- Not recorded
- Altitude class
- —
- Native to
- Canada, United States, Mexico
Cultivation
- Difficulty
- Not recorded
Text adapted from Wikipedia, CC BY-SA 4.0.
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