The Linden family with about 35 genera and over 300 species is chiefly tropical, having more representatives in the southern than in the northern hemisphere. Of the 3 North American genera only one (Tilia) is arborescent. Of the 8 species of Tilia (pp. 197, 199) found in North America 2 are native to West Virginia. The European Linden (Tilia Europea, L.) is occasionally planted.