Oenothera biennis L.
(Common Evening-primrose)

Taxonomic hierarchy:
SpeciesOenothera biennis (Common Evening-primrose)
GenusOenothera (evening-primroses)
FamilyONAGRACEAE (willowherbs and evening primroses)
OrderMYRTALES (willowherbs, loosestrifes, gums and tea-trees)
SubclassEU-DICOTS (dicotyledonous flowering plants)
ClassMAGNOLIOPSIDA (flowering plants)
PhylumTRACHEOPHYTA (vascular plants)
KingdomPLANTAE (plants)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Oenothera biennis (Common Evening-primrose) :
1: Oenothera biennis (Common Evening-primrose)
11 Jul 2011 OSGR: SS88 51° 30’ N, 3° 40’ W Vice County: Glam (VC 41) Wales
Image 1: First year rosetteImage 2: Flower buds - side viewImage 3: Flower buds - side view - grey backgroundImage 4: Flower buds - side view - grey background (2)Image 5: Flower - oblique view - grey backgroundImage 6: Flower - oblique view - grey background (2)Image 7: Flower - side view - grey backgroundImage 8: Flower - side view - grey background (2)Image 9: Flower spikeImage 10: Flowers - side viewImage 11: Flowers - top viewImage 12: FoliageImage 13: PlantImage 14: Main stem - close-up - enlarged - grey backgroundImage 15: Seed pod - immature - close-up - enlarged - grey backgroundImage 16: Seed pod - immature - close-up - enlarged - grey background (2)Image 17: Seed pod - immature - close-up - enlarged - grey background (3)

Oenothera biennis (Common Evening-primrose) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Oenothera biennis (Common Evening-primrose)
BioInfoBioInfo (www.bioinfo.org.uk) has 3 host/parasite/foodplant and/or other relationships for Oenothera biennis (Common Evening-primrose)

A common species of waste ground and gardens.

As the common name implies, the yellow flowers open in the evening. The speed at which they open is quite remarkable, the petals expanding within a few seconds. Watch this in July between 8 and 8:30pm. The flowers shrivel in the following day’s sun.

Although not even a European plant, it is commonly grown in wildlife gardens as the seeds attract Goldfinches.

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