''Circaea'' × ''sterilis'' is a

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two diff ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of ...

s in the evening primrose family

Onagraceae The Onagraceae are a family of flowering plants known as the willowherb family or evening primrose family. They include about 650 species of herbs, shrubs, and trees Circaea alpina ''Circaea alpina'', commonly called alpine enchanter's nightshade or small enchanter's nightshade, is a 10–30 cm tall perennial herb found in cool forests of the Northern Hemisphere. Description The leaves are opposite, ovate, 2–6 ...

'' and ''

Circaea canadensis ''Circaea canadensis'', known as eastern enchanter's nightshade, Canada enchanter's nightshade, broad-leaved enchanter's nightshade, is a perennial herbaceous plant Herbaceous plants are vascular plants that have no persistent woody stems ab ...

''.

References

sterilis Plant nothospecies Flora of North America {{DEFAULTSORT:Circaea x sterilis