Note the distinctive appendages to the flowers.
Oenothera agg. 25July2017 NS7266 MP
They can be identified to genus level even when ‘gone over’.
Oenothera agg. 25July2017 NS7266 MP
Oenothera biennis x glazioviana = O. x fallax NS5665 12Aug2017 PW
Oenothera biennis x glazioviana = O. x fallax NS5665 12Aug2017 PW
Oenothera biennis x glazioviana = O. x fallax NS5665 12Aug2017 PW
Oenothera biennis x glazioviana = O. x fallax NS5665 12Aug2017 PW
Oenothera biennis x glazioviana = O. x fallax NS5665 12Aug2017 PW
It is a big flowered variety
Oenothera glazoviana NS5364 07Aug2018 PW
Oenothera glazoviana NS5364 07Aug2018 PW
The red-tinged sepals are distinctive.
Oenothera glazoviana NS5364 07Aug2018 PW
There are glandular hairs where the flowers emerge.
Oenothera glazoviana NS5364 07Aug2018 PW
Oenothera glazoviana NS5364 07Aug2018 PW
Oenothera glazoviana NS5364 07Aug2018 PW
Again, the genus at least can be determined when the flowers are gone.
Oenothera glazoviana NS5364 16Feb2018 PW