The Birch tree is a graceful tree about 25m high, which has a pyramidal shape while young. It has bright green leaves and a dark reddish-brown aromatic bark, which his broken into plates or patches. Native to southern Canada and southeastern USA; it now grows also in Russia and parts of Eastern Europe.
Bitter orange (Citrus xaurantium.L) or otherwise known as Seville orange belongs to family Rutaceae.It is commercially cultivated in subtropical region of European countries and in florida and California as well. The tree is of height not more than 30 ft (9 m), is more erect and has brown bark, green twigs. The fruit is round and oblong-oval rough-surfaced, with a strong, aromatic bitter peel
The black pepper whose botanical name is Pepir nigrum is initially a forest woody vine plant that uses trees and other support to grow taller about 12 feet to 20 feet high. This plant commonly has a lifespan nearly of 20 years. The start of using black pepper originated from the countries China, India, Indonesia, Madagascar and Malaysia.