The leaves I have sectioned appear to be (upper protions) entirely unistratose, but there is a hint of thicker cell walls at the margins. I presume this material grew permanently submerged. This material is remarkably like an isotype of Sciaromium bellii, ex Lime Hills Southland.
Other identifications
Identification
Determined name:
Cratoneuropsis relaxa (H.f. & W.) Fleisch. e Broth.