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Oenothera tetragona

Family: onagraceae
Common name(s): Sundrops
Hardiness ratings: USDA zone 3 - 3~8

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Oenothera tetragona

• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-8) (9 photos)
• Garden.org: Oenothera tetragona 'Highlights' - Community-assembled plant profile (1 photo)
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3-3) (6 photos)