I agree they have a similar form, but the flowers on these seem very different from any Texas native Senegalia species I’ve found. That drawing on the Wikipedia page shows the kind of spiky flowers they all seem to have, where these each have 5 rounded petals (see pic in comments)
they do look like young gangly specimens of the Senegalia drawing on Wikipedia
they’re technically “neighbors” to acacia – senegalia, acacia, mimosa, and mesquite are all part of the Mimosoid clade
I agree they have a similar form, but the flowers on these seem very different from any Texas native Senegalia species I’ve found. That drawing on the Wikipedia page shows the kind of spiky flowers they all seem to have, where these each have 5 rounded petals (see pic in comments)