ailanthiis's Identifications

Could really use help with this species. It’s obviously a tree in the rose family, based on the very small, red berries. One of the 4 trees (the oldest) has very smooth, gray bark, especially on the main trunk. Didn’t notice any warty texture to the bark. Not many leaves remain on the trees from last season, but what there are, almost all appear to be infected with a kind of insect gall that grows from where the leaf base and petiole meet. Habitat is about 6000’ piñon/juniper/oak in a wash where they appear to benefit from rainfall runoff from adjacent granite boulders. Site is in the wilderness boundary, east of the Open Space water impoundment for Embudo drainage.