That doesnt really look like ludwigia, ludwigia has leaves that are more of a tear shape, these are round. If anything the lower leaves resemble Moneywort or some bacopa.
But im still going with the plant being Rotala just it was sold in emersed form.
Heres my rotala from a while back. Notice also the round leaves. Eventually the plant switched over to submerged form and gave out narrower leaves
But im still going with the plant being Rotala just it was sold in emersed form.
Heres my rotala from a while back. Notice also the round leaves. Eventually the plant switched over to submerged form and gave out narrower leaves