Circaea ×sterilis Boufford. Common name: Hybrid Enchanter's-nightshade. Phenology: Jun-Aug. Habitat: Mesic, nutrient-rich forests. Distribution: 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.
Origin/Endemic status: Native
Other Comments: C. ×sterilis is reported to occur frequently in the absence of one or both of its parents (Boufford 1983; Skvortsov 1979), and is therefore treated separately and keyed here. Recognition of C. canadensis (Linnaeus) Hill as distinct from C. lutetiana renders the hybrid binomial name C. ×intermedia inappropriate for North American plants, since it is the hybrid of C. alpina ssp. alpina and the European C. lutetiana.
Synonymy ⓘ: = FNA10, K4, Boufford (2005), Wagner, Hoch, & Raven (2007); = Circaea ×intermedia Ehrh. (pro sp.) — C, Pa, RAB, W, Boufford (1983 [1982]), Munz (1965), misapplied; = Circaea alpina L. ssp. alpina — NY; = Circaea canadensis (L.) Hill — G, WV, misapplied; > Circaea canadensis (L.) Hill var. canadensis — F, misapplied; > Circaea canadensis (L.) Hill var. virginiana Fernald — F. Basionym: Circaea ×sterilis Boufford 2005
Links to other floras: = Circaea ×sterilis - FNA10
Show parent genus | Show parent in key(s)
Wetland Indicator Status:
- Atlantic and Gulf Coastal Plain: FACU (taxonomic split from wetland indicator species)
- Eastern Mountains and Piedmont: FACU (taxonomic split from wetland indicator species)
- Great Plains: FACU (taxonomic split from wetland indicator species)
- Midwest: FACU (taxonomic split from wetland indicator species)
- Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)
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Horticultural Information
No horticultural data found for this taxon.