A friend of mine works for a tree trimming and custom furniture shop. Although most of their trees end up in the chipper, some of it gets milled into lumber. The Black Walnut (Jugulans nigra) that this series of bowls was created from came from him.
They are all about three inches high and range in diameter from six to ten inches. There were a couple of crotch pieces, which resulted in very nice feathers in the finished pieces.
The wood was fairly rotten in places and had several large checks, which made turning a challenge. I lost one of the pieces when I caught a crack and it exploded on the lathe.
This series is characterized by simple forms. Instead of a foot, they have just a slight depression for the base. The walls are a bit thicker than usual, as it seemed like the pieces wanted a beefier feel to them. The smallest has a hint of lighter sapwood as a highlight. The second one pictured has a very simple grain so I gave it a slight concavity on the rim. The remaining two have both simple rims and feet; the amazing grain structure is their showcase.