Common Evening Primrose (Oenothera biennis)

Went geocaching this afternoon and saw this little wildflower. pretty right?
Options I've come across include: evening primrose
http://lee.ifas.ufl.edu/Hort/GardenPubsAZ/Cutleaf_Evening_Primrose_Oenothera_laciniata.pdf
look at the growth pattern of the flower in the article and the similarity to my specimen. the only thing that differs is the leaf shape (look at the second picture for better leaf clarity)
I'm pretty sure that http://uswildflowers.com/images/full/pict1717.jpg is a match. Leaf shape and what not. I realize why I spotted it, it was beginning to darken outside. And this flower only blooms at the end of the daylight. So this moment in the flower's life it's only been blooming for a minute or so. It was super fresh, but I didn't understand that at the time. :D

Frog Fruit (Phyla nodiflora)

Tiny flower made up of tiny flowers
Found it almost no trouble. The flower itself is pretty distinctive. PICTURE
It's called 'frog fruit'... precious... http://en.wikipedia.org/wiki/Phyla_nodiflora
:D I love it when it's that easy!

Nayou Vine (Merremia dissecta)

Flower growing on a vine I spotted while geocaching

It's very morning glory like.

I think I found it maybe, http://www.floridasnature.com/images/Noyau%20Vine%20(Merremia%20dissecta).jpg

an Alamo Vine?

YES. http://plants.ifas.ufl.edu/node/267

Solved. Nayou Vine (Merremia dissecta)

Beautiful but apparently possible invasive. That upsets me too because I collected some seeds from it. :(

The flower

the leaf structure

The seed pod