Planted Tank Guru
Join Date: Aug 2005
Location: Somewhere in the Florida panhandle
There is no such thing as "Ludwigia peruensis" in the scientific literature. It's just a made up nonsense trade name. The correct name for that plant is Ludwigia glandulosa. If your plant has alternate leaves (one per node), it's that. If opposite leaves, it's Alternanthera reineckii. Just hard to tell for sure from the photo.
The 'super red' appears to be palustris, not repens. But some flowering material would make it easier.