What is this plant?

by Liz
(bigtexworms.com)

I need your help!

I have been calling this plant salvia since we moved in this house last year. They are popping up all over the yard, so they are some kind of perennial or native flower to Texas.

They have cute little red flowers on the tips. The second photo is a close up, so you can help me to identify.

I have one that is a good 3.5 feet tall next to my mailbox. They are really tall.

What are these plants? I would love to know.

I am trying to transplant them to the flowerbeds, I am excited they are pretty. And it is refreshing to know these will grow well in my soil and provide some color.