RMP7DPB8–Evening primrose, Oenothera fruticosa subsp. glauca (Glaucous oenothera, Oenothera glauca). Handcoloured copperplate engraving by S. Watts after an illustration by Miss Sarah Drake from Sydenham Edwards' Botanical Register, Ridgeway, London, 1832.
RMRJX304–. Atlas of the rare vascular plants of Ontario. Rare plants; Botany. Atlas of the Rare Vascular Plants of Ontario/Atlas des plantes vasculaires rares de l'Ontario ONAGRACEAE Oenothera frutlcosa L. ssp. glauca (Mlchx.) Straley (O. tetragon a HoVc) Sundrops Onagre frutescente. HABITAT: Open meadows, stream margins, and edges of woods. STATUS: Possibly rare in Canada. Endangered in Missouri. Status in other states could not be accurately determined. NOTES: According to Straley (1977), Oenothera fruticosa comprises ssp. fruticosa and ssp. glauca; the latter has a more northern distribution and ex