The part of the seed known as the kola nut is the cotyledon, which is also called the seed leaf. The cotyledons are white and bitter when fresh, but they turn reddish with almost no taste when they are dried.
The leaves contain a fragrant volatile oil.
Witch hazel bark and leaves.
Although chiefly valued for its decorative fine-grained wood, the tree's bark, root, leaves, and nuts all have medicinal properties.
The red-black berry is the most used part and the leaves and blue violet flowers also contain medicinal properties.
The noni fruit and other parts of the plant also are used medicinally, including the leaves, bark, flowers, and roots.
The tree's bark contains an oil with many active ingredients; waxes, fatty acids, and other less familiar compounds.
The ripe, berries and needles from the tree are used in herbal medicine. The tree's therapeutic properties stem from a volatile oil found in the berries.
Apricot seed is the small kernel enclosed within the wood-like pit at the center of the apricot fruit.
The flowers and berries are used most often, although the leaves, bark, and roots are also considered to have therapeutic effects.
The American white oak, Quercus alba, and the English oak, Quercus robur, have bark with similar healing qualities.
West Africa is the native home to the kola tree.
Every two years the trees are cut to just above ground level. The bark is harvested from the new shoots, then dried. The outer bark is stripped away, leaving the inner bark, which is the main medicinal part.