Texas Gardening: Trying to ID this Texas native shrub, 1 by eatmyplants

eatmyplants wrote:
There are many of these shrubs in this one area of woods. Some are loaded with berries and some have none. I believe they are all the same bush but I've noticed the leaves are somewhat yellower on the ones with berries. I was thinking some were male and some were female and maybe that the ones with berries possibly used up more nutrients to make the fruit thus have more yellowish leaves. The leaves can slightly vary from one limb to another, some with rounded tips and some with more pointed tips.