Oenothera elata

Oenothera elata

Oenothera elata Kunth.
Engl.: Hooker's evening-primrose.
Bot. syn.: Oenothera hookeri Torr. & Gray, Oenothera ornata (A. Nels.) Rydb., Oenothera simsiana auct. non Ser.

I have no articles for this botanical term, but there might be some for the next level down (if found).