I went over to a ladies house to repair her riding mower and these were scattered about the yard. She said it was a walnut but my walnut trees have round fruit. I googled it and think it's butternut. Just looking for verification. Thanks.
Earlier in the year, the walnuts that fall have that shape. As Autumn nears, they round out. I know nothing about butternuts.
look like the walnuts we have here Butternut (Juglans cinerea), also known as white walnut, (from wiki)