Yes, probably L. arcuata. L. brevipes has leaves that are usually green right at the stem, graduating to orange farther out. It also grows more of a hedge than up. It's stockier and with leaves that are a bit wider.
Thanks guys, I have studied all the versions closely, it is Ludwiga Brevipes, no doubts. Here is another picture from long time ago, before any trimmings, when the bush wasn't so dense and there were enough space for leaves to fully develop.