|Range within North America|
The leaves are opposite, ovate, 2–6 cm and coarsely dentate. The 1.5–4 cm (0.6–1.6 in) petioles have a wing beneath. The flowers and fruits are clustered near the top of the fruiting raceme; each raceme bears 15 or less white or pink flowers in mid-May through early September. Each flower has two white to light pink petals 1–1.5 mm (0.04–0.06 in) long with two lobes. The two white sepals are 1–2 mm (0.04–0.08 in) long. The fruit is a small bur with one seed. C. alpina can reproduce vegetatively and via stolons.
In North America, Circaea alpina is distributed throughout all of Canada and North Carolina through Maine and New Mexico through Washington. In Eurasia, the range of C. alpina includes Northern Europe south to Albania and Bulgaria and east to Korea and Japan. C. alpina prefers a moist, upland habitat. It is generally found in forests or near streams from sea level to 3,000 metres (10,000 ft).
- "Species details : Circaea alpina". ITIS: Catalogue of Life. Retrieved 2016-08-02.
- "Alpine Enchanter's Nightshade". Naturegate. Retrieved 2016-08-02.
- Giblin, David (Editor) (2015). "Circaea alpina". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2016-08-02.CS1 maint: extra text: authors list (link)
- "Circaea alpina". Jepson eFlora: Taxon page. Jepson Herbarium; University of California, Berkeley. 2015. Retrieved 2016-08-02.
- Sullivan, Steven. K. (2015). "Circaea alpina". Wildflower Search. Retrieved 2016-08-02.
- "Circaea alpina". PLANTS Database. United States Department of Agriculture; Natural Resources Conservation Service. 2015. Retrieved 2016-08-02.
- Rhoads, Block (2007-09-05). The Plants of Pennsylvania (2 ed.). ISBN 978-0-8122-4003-0.