where did you get the seeds from? Were you buying herbs,... or edibles... or medicinals ? wild guesses... Salvia leucantha (Mexican bush sage) other sage type of mint? type of sorrel , mustard or spinach vervain

Also look under hibiscus "Lord Baltimore". Looks a lot like it.

Neither an algae nor a moss ==>>> something in the back of my mind.. tells me its not a PLANT either .... the link says: Liverworts are not vascular plants, but a more primitive life form similar to mosses. They do not have true leaves like most organisms we consider plants. is there a better way to say what i think i remember???? .. im just trying to remember something.. not argue about anything .... ken http://oregonstate.edu/dept/nursery-weeds/weedspeciespage/liverwort/liverwort_page.html

That seems like an unlikely tree to put in a location like that because it will be tall enough to need to be dramatically trimmed very soon, and is not an area where I would have any familiarity regarding what plants are native &/or likely to be used in such a way.