Order.

Range of

Temperature between

Isotherms.

Common Name.

Botanical Term.

Geographical

Location.

(Range N. to S.)

Approx.

Altitude above

Sea-level.

Zone.

Coniferae.

40° 30°

Northern Pine.

Pinus

Sylvestris.

Northern Norway. Southern Spain. Etna.

3000 ft. 5600 ft. 7000 ft.

North Temperate.

Cupuliferae

4O0 20°

Beech.

Fagus Sylvatica.

640 N., Northern

Europe. Balkans, 420 N. America.

Plains. 2000 ft.

North Temperate.

Meliacea;.

IO°

Mahogany.

Swietenia Mahagoni.

Central America. Antilles. West Indies.

1500 ft.

Sub-Tropical.

Salicaneae.

40° 30°

Poplar.

Populus Nigra.

Central to Southern Europe. In Scotland.

1500 ft.

North Temperate.