Native to the south Texas plains, considered a pest in parts of Florida, Alamo Vine is a novelty in my garden growing on the Stick House.
I wrote about Alamo Vine last year.
I'm not sure if Merrimia dissecta is perennial here or just reseeds in the same spot. I've not seen seedlings anywhere else.
Here you can see last year's pods (woodroses) at upper right center and none of the blooms which face toward the field. Coming across from the left is Cecile Bruner rose, now out of bloom.
Notice the field: corn in the distance -- looks like a green line in front of the trees because of the angle -- in front of corn is peanuts, a darker green and then pale green meadow grass between us and the crops.