Thanks Garg ji. I have already gone through that page. The reasons for this plant to be O. biennis are - It was already mentioned as O. biennis in the University Herbal garden so they must have corfirmed it.
Some other differences are- 1. In Oenothera glazioviana Petals are much larger 3-5cm long while in Oenothera biennis petals are only upto 2.5cm long. 2. These plants are much taller upto 6 feets and according to FOC stem is upto 150cm in O. glazioviana while plants are much longer upto 200cm in O. biennis. 3. Stigma is surrounded by anthers in O. biennis which is similar in my plants while in O. glazioviana stigma is much elevated above anthers. Best regards Ashutosh Sharma -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.

