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Oenothera tetragona A. Roth. Common name: Northern Sundrops. Phenology: May-Aug. Habitat: Moist to wet meadows, woodlands, stream margins, river-scours, rocky shoals. Distribution: NL (Newfoundland) west to MI, south to e. VA and MO.

Origin/Endemic status: Native

Taxonomy Comments: Pubescence and leaf shape vary widely in this species, approaching both O. fruticosa var. fruticosa and O. hybrida (see ID notes under both taxa); as here circumscribed O. tetragona may include multiple entities.

Synonymy ⓘ: = RAB, Tat; = Kneiffia glauca (Michx.) Spach — S13; > Kneiffia latifolia Rydb. — S; > Kneiffia tetragona (Roth) Pennell — S; > Kneiffia velutina Pennell — S; < Oenothera fruticosa L. ssp. glauca (Michx.) Straley — FNA10, Pa, W, Straley (1977), Wagner, Hoch, & Raven (2007); < Oenothera fruticosa L. ssp. tetragona (Roth) W.L.Wagner — K4, NY, Wagner (2014); < Oenothera tetragona Roth — C, Tn, Va; > Oenothera tetragona Roth ssp. tetragona var. tetragona — Munz (1965); > Oenothera tetragona Roth ssp. tetragona var. velutina (Pennell) Munz — Munz (1965); > Oenothera tetragona Roth var. latifolia (Rydb.) Fernald — F, WV; > Oenothera tetragona Roth var. tetragona — F. Basionym: Oenothera tetragona Roth 1800

Links to other floras: < Oenothera fruticosa ssp. glauca - FNA10

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Heliophily ⓘ: 8

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Edwin Bridges | Original Image ⭷
image of plant© Edwin Bridges | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷

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Horticultural Information

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native range: eastern North America



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