as you can see in flower forest biome(don't mind the "plains" under the map, i did move 2 steps away from that), there are regular oak trees with flowering oak leaves.

used:
DynamicTrees-1.12.2-0.9.15
DynamicTreesBOP-1.12.2-1.4.2
BiomesOPlenty-1.12.2-7.0.1.2444-universal
also you can find the modpack i used in, in my profile, called kenijey's modpack

Duplicate of #24