Oak is a plant on O. It comes from the beech family and has nearly 460 species. The tree reaches over 30 meters in height. Oak wood is used in furniture making, while bark is used in tanning. The fruits of this plant are acorns that can reach up to 6 cm in length.
Opuntia is one of the plants on O. It belongs to the cactus family. They are characterized by the fact that they are flattened and have spines. It was brought to Europe by Christopher Columbus. Some of its types are used in cosmetics due to their antibacterial properties.