Female Flowers, Fruits, and Male Catkins of Juglans Cinerea
The common name of juglans cinerea is butter nut. The tree is a variety of walnut. The flowers are a greenish color. The fruit are oblong with a tapered tip. The tree grows between thirty and sixty feet tall.
Nicholson, George The Illustrated Dictionary of Gardening, Div. VI (London, England: L. Upcott Gill, 1884)