Terminology - Fence posts etc

Evening all.

This might seem like a daft question, but you can buy timber that is just the bark covered outer bits, the cast-offs almost from the saw mill as they take a tree trunk and trim it to get to just a square plank. Sometimes these bark covered bits are used for rustic fences.

If I was looking to buy some such sticks, what would I call them?

 

Waney edge offcuts

 

As far as I'm aware they're called "slabbing". I once clad a trees house with them and it looked very rustic. (It was a stilt house really but served the same purpose).

 

Slab wood.