Oenothera tetragona

Oenothera tetragona
Flowers
At the University of Wrocław Botanical Garden
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Myrtales
Family:	Onagraceae
Genus:	Oenothera
Species:	O. tetragona
Binomial name
Oenothera tetragona Roth
Synonyms
List Kneiffia fraseri Spach Kneiffia glauca (Michx.) Spach Kneiffia latifolia Rydb. Kneiffia serotina (Lehm.) Bartl. Kneiffia tetragona (Roth) Pennell Kneiffia tetragona var. hybrida (Michx.) Pennell Oenothera ambigua (Nutt.) Spreng. Oenothera canadensis Goldie Oenothera fraseri Pursh Oenothera fruticosa var. ambigua Nutt. Oenothera fruticosa var. differta Millsp. Oenothera fruticosa var. fraseri (Pursh) Hook. Oenothera fruticosa var. glauca (Michx.) H.Lév. Oenothera fruticosa subsp. glauca (Michx.) Straley Oenothera fruticosa var. incana (Nutt.) Hook. Oenothera fruticosa f. incana (Nutt.) Voss Oenothera fruticosa var. maculata H.Lév. Oenothera fruticosa subsp. tetragona (Roth) W.L.Wagner Oenothera glauca Michx. Oenothera glauca var. fraseri (Pursh) Torr. & A.Gray Oenothera glauca f. fraseri (Pursh) Voss Oenothera hybrida Michx. Oenothera hybrida var. ambigua (Nutt.) S.F.Blake Oenothera incana Nutt. Oenothera serotina Lehm. Oenothera tetragona var. fraseri (Pursh) Munz Oenothera tetragona subsp. glauca (Michx.) Munz Oenothera tetragona var. hybrida (Michx.) Fernald Oenothera tetragona f. hybrida (Michx.) Munz Oenothera tetragona var. typica Munz

Oenothera tetragona, the glaucous evening primrose, is a species of flowering plant in the family Onagraceae, native to eastern North America, and introduced to Germany, the Czech Republic, and Myanmar. The Royal Horticultural Society considers it a good plant to attract pollinators. There is a cultivar, 'Glaber', also known as 'Clarence Elliott'.