Walnuts

Walnuts are the fruit of the walnut tree, which is a large, deciduous tree that produces edible seeds: 

• Tree

• The walnut tree is a member of the genus Juglans, which includes about 15 species. Walnut trees can grow to be 82–115 ft (25–35 m) tall and live for over 200 years. They have a wide-spreading canopy and a short trunk that can be up to 6.6 ft (2 m) in diameter. The bark is smooth and olive-brown when young, but develops fissures and fades to silver-gray with age. 

• Leaves

• Walnut leaves are pinnately compound, meaning they are divided into several feathery leaflets. The leaflets are bright green and oval-shaped. 

• Flowers

• Walnut trees produce male and female flowers in different petal-less flower clusters called catkins. 

• Fruit

• The fruit of the walnut tree is a fleshy green drupe that contains a nut. The nut is enclosed in a corrugated woody shell that is usually brown and wrinkly. The shell encloses the kernel, which is usually separated into two halves by a membranous partition.