My best guess guess after a little digging around is could be doveweed
(murdannia nudiflora).
If it is indeed doveweed, aka nakedstem dewflower and a few other names in english, I learned it is edible and is
native to asia where it is used medicinally as a poultice for wounds such as cuts, scrapes and burns but can also be eaten. Here's a pretty cool website I found with some info on it.
http://www.floridaforaging.com/plant/murdannia-nudiflora