The second looks a little like my ground cherries.

Man, I want some ground cherries.

Mirabilis texensis

That's it, Mara. Chicory, thank you! Do you know if it's invasive? Sure does great on the hot highway. Don't think the other is ground cherry, the leaves don't look right but I'll keep an eye on it and see.

Think abarbie4me2 might be right about the second being a 4-o'clock..... possibly M. albida (umbrella wort/white 4-o'clock) rather than m. texensis?

I also first thought of groundcherries, but ones we get have much broader leaves and the downward-facing flowers always have a dark center like this:

Mara, I still have ground cherry seeds for you. Three years later, so sorry. I wonder if they are still viable?

LOL!

Wikipedia says that chicory has naturalized all over. Has been declared invasive in a few states , but not in Texas.

While the flower may look like the umbrella wort, the plant itself is nowhere similar. This is only about 8" high, sends out a vinelike stem and stays close to the ground until the stem gets longer. I'm stumped. I've sent requests to Plant Identification on Facebook and to Lady Bird Wildflower Center FB page and no luck. The flower is green, it doesn't open up another color and change to green.

This link for mirabilis albida shows a much different flower and plant structure. Still trying to figure it out. http://www.wildflower.org/gallery/result.php?id_image=28546

This is very intriguing - sure hope you get an answer! I wonder if someone at the Name That Plant! forum on this site could help.

Have you gone on the Name that plant forum on GW?

I'll try it, thanks.

That last one looks familiar...might be what I've seen around here. I don't have an ID either. It's invasive, I know that much.