Why Do Some Trees Have Fine-Haired Leaves and Others

Don't?

China has more than 8,000 varieties of trees and shrubs across the country. Trees grow-ing in a hot climate, such as the rubber plant, bodhi tree, citrus and osmanthus, have green leaves all the year round and have no hair on their leaves so that they dry quickly after rain and suit the hot, wet climate. On the contrary, the leaves of trees growing in a cold climate, such as the Chinese wolfber-ry, apple free and paulownia, wither in win- ter. Such leaves have a thick layer of fine hair on their back. The thick hair protects the leaves from severe cold and keeps moisture from evapourating.