Where that question mark is..
how about Reinecki rosaefolia?
I think the lighting is a bit too high for it in that location, it's fine behind the wood etc, but then you do not see it.
This light has far more lighting than most folks in terms of PAR.
Even my 180 Gal, runs 100 umol at the bottom now using only 30% power.
That tank is 24" deep and not 18" also.
I had PC's on that tank, running 384W, now I poll only 187W but have 2.5X more light.
I'm only using basically 1 W/gal on my 180.
This 120 Gal is only 3.6W/gal for 4 hours......but it's lots of light.
FAR more than the old school rules of W/Gal.
I suppose I could also try R macrandra, but it's weedy and grows all over.
Not the best form there.