We have a holly bush in our yard that came up on its own several years ago after birds had spread the berries. It doesn't get berries, but instead has big and very pretty bright lemon yellow flowers at the top of a branch and smaller clumps of yellow flowers up and down the branches at the leaf joints. It is very decorative as it is, but I am wondering why the difference? I've never seen one like this. Is it a male plant?
Yellow Flowers, No Berries on Holly
Certified GKH Gardening Expert
What you have is likely not a holly at all, but one that is similar looking. The following article lists possible species in which yours could be. Look up the names and locate a picture to compare it with the one you have. https://www.ehow.com/info_8587280_yellow-flowers-holly-like-leaves.html