Pictures similar to your one can be found as both Aquilegia - AQUILEGIA GREEN APPLES - Garden Express and Semiaquilegia - http://macgardens.org/wp-content/uploads/2019/05/Semiaquilegia-adoxoides-fl.-pl.-Alba.jpg Not sure how to tell them apart.
I know nothing about this, but here's a page for 'Green Apples' that shows the green petal tips like yours: Aquilegia vulgaris var. stellata 'Green Apples' (Columbine)
Thank you for your help, guys. I think, it's a Semiaquilegia because the leaves on my pic and the pic from this URL look very similar: http://macgardens.org/wp-content/uploads/2019/05/Semiaquilegia-adoxoides-fl.-pl.-Alba.jpg
Notice that the doubles in these shots tend to have different stems and leaves from the singles, I have no particular knowledge of this topic but it appears that double garden forms of columbines are being grown in place of the wild species plant Semiaquilegia adoxoides. If this latter has also produced some doubles these should be differentiated with horticultural names. semiaquilegia adoxoides - Bing images
