English translations for "Schwartenholz"

Hi, I'm looking for a translation for the German term "Schwartenholz". It's basically the very outside of a tree. One side may still have bark on it. Here's a picture.

Thanks for your help!

dict.leo.org says: slab

Thanks! I searched leo for Schwartenholz, but not for Schwarte. Sheesh, must be time to take a break...

I tried to Google this one.
"Schaalboard" might fit.