Chambered Pith

cross section of a twig
Pith dark. 11 - 17 leaflets. The end leaflet is abouit the same size as the side ones. Butternut
cross section of a twig
Pith white. 15 - 17 Leaflets. The end leaflet is smaller than the side leaflets or it is missing. Black Walnut

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This key was developed by "bt" in June 1982. It was put into HTML format by Stephen Ostermiller in July 1997. Copies of the entire guide in zip format that may be taken to camp on a laptop are available to those who write.