| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Onagraceae | Circaea ×sterilis | Hybrid Enchanter's-nightshade | Mesic, nutrient-rich forests. | NL (Newfoundland) west to ON and MN, south to w. NC, OH, and WI; it appears to be rare in our area, but should be sought more carefully. | |
| Onagraceae | Circaea alpina ssp. alpina | Alpine Enchanter's-nightshade | Moist organic soil at high elevations (especially in spruce-fir and northern hardwood forests), rocky or gravelly seepages, in spray behind waterfalls, at dripping cliff bases. | Ssp. alpina is itself circumboreal, in North America ranging from NL (Newfoundland) and NL (Labrador), west to AK, south to MD, w. NC, e. TN, KY, n. IL, MN, MT, and WA, disjunct in montane sites southward in the w. United States, such as the Black Hills of SD, and isolated montane sites in CO, AZ, and NM. |  |
| Onagraceae | Circaea canadensis | Canada Enchanter's-nightshade | Mesic, nutrient-rich forests. | NS and NB west to se. MB and ND, south to e. NC, c. SC, s. GA, LA, OK, and NE. |  |
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