With mistletoe.

Thank you so much, that helped my search, I believe it’s the celtis laevigata (sugarberry, or southern hackberry) because of the texture of the bark on the main trunk, not seen in the picture. And any idea how to get rid of mistletoe, or just leave it? Only two clumps on the whole tree. And tree seems to be in poor health, parts rotted and with holes in certain areas. Thinking about cutting it down and planting a red maple in its place.

Where do you see the mistletoe? I've seen it before in broad-leaf trees but I can't spot it in the pics.

About midway up the picture of the large branch, hard to see

Initially I thought 1 might be mistletoe but concluded it is the top of a different tree in the background. I guess 2 is the mistletoe because the leaves are different but I haven't seen a mistletoe with leaves that round and large before.

There’s another clump way up top, looks to have the same type of leaves. Probably a different type? I know nothing about mistletoe though.

Mistletoe is the official floral emblem of Oklahoma, dating back to 1893. Many people wish this were not so. It was somewhat in favor at the time because it stayed evergreen in winter and could be collected from trees and used to decorate graves in winter when few other native plants were green. In the 1980s, the legislature tried to work around this controversial historical choice by designating the Indian Blanket as the state's official wildflower.

Mistletoe is a parisitic plant and most people here prune it out of the desirable trees in their landscape for that reason, at least until it gets high enough in tall trees to be beyond the range of pole pruners. If it spreads enough, I suppose it could become a problem for a tree, but it really is more of a nuisance than a threat most of the time. I seldom see it in oak trees on our acreage, but it is somewhat common in elms and hackberries.

There are different species of mistletoe so I guess you could have more than one and they could appear different from one another.