dry fruits 
Fruits with usually edible seeds, surrounded by a single dry, somewhat rigid layer.
Fleshy covering, first green then changing to brown, that protects the walnut shell. The husk is used to produce a stain that makes white wood look like walnut.
section of a hazelnut
The fruit of the hazelnut tree, the hazelnut is an achene; its pericarp is covered by a cupule.
Visible remnant of the flower’s stigma, now withered, forming a point at the fruit’s base.
Small dry fruit containing a single seed not fused to the pericarp; when ripe, the achene cannot split unaided to release its seed.
Structure formed by the development of a fertile ovule; it contains an embryo and nutrient reserves that enable a new plant to grow.
Little leaf, smaller than the plant’s other leaves, attached to the peduncle of the flower or fruit.
Thin scaly or prickly casing made of fused bracts; it partially or completely covers the hazelnut.
section of a walnut
The fruit of the walnut tree is the nut, which has an edible seed; its stone, or shell, is surrounded by a fleshy husk.
Membranous barrier that divides the walnut kernel into sections.
Kernel of the walnut, divided into two main sections by the partition.
Hard fibrous ovoid casing that covers and protects the green walnut.