The second picture is UV flora, aka Bee vision
A big patch, growing along the fence, some look very old.
Prunus texana flowers are bigger than Prunus minutiflora
Compare the size of flower here: https://www.inaturalist.org/observations/198861558
Trumpet Flowers - farm
Rare along wash
Has smooth dry leaves and has long branches and it is very tall. Dark green in the brush. The leaves are smooth and pointy/long.