Tiny plant growing on sandstone id please

Hello.

Recently found this tiny plant growing on a trail in northern VA, I think Frederick County. Substrate is largely sandstone, shale, slate. It was growing with moss on a bank. Grass leaf in pic with unknown is a species of Dichanthelium so gives an idea of size.

Thanks for any ideas.

 

Could it be basal leaves from Houstonia species?

Decided not Epilobium…it’s Houstonia.

 

I found a Houstonia (I think) with larger basal leaf rosette….but I think this rosette (red circle)is different from smaller rosettes (blue circle)…they are not the same species?