Betula ermanii

Erman's birch (Betula ermanii )

Erman's birch (Betula ermanii ), also gold birch or birch Kamchatka, is a kind of deciduous tree from the kind of birch (Betula ).

Description

Erman's birch is a deciduous tree that reaches heights of growth of 4-12 meters. Rare specimens reach extreme values ​​up to 20 meters. The bark is yellowish white and Meshing. The bark of young branches is bald, but with glandular warts and orange.

The stalked leaves are broadly ovate. On the leaf blade can be found on both sides between seven and eleven lateral veins, giving the leaf a rib-like surface. The veins on the leaf surface are more or less sunk considerably. The leaf blade is 5-8 inches long, 4-6 inches wide and acuminate. The base of the leaf blade is trimmed to heart-shaped. The leaf surface is leathery. The leaf margin coarsely toothed. The leaf blade is on both sides and glandular- hairy only on the veins on the underside with axillary beards. The petioles are between 1.5 and 2.5 inches long and warty.

The flowering period begins in May. The single and upright kitten -shaped buds are ovate with a length of 2 to 3 centimeters and a diameter of about 1.5 centimeters.

Dissemination

The species is very cold tolerant. In Russia, Erman's birch found in southern Siberia, Buryatia and in Transbaikalia and in Sacha, Kamchatka and Sakhalin. Also on the Kuril Islands is the type often.

In the People's Republic of China, the distribution area extends over the provinces of Heilongjiang, Jilin, Liaoning and Inner Mongolia Autonomous Region.

In Japan the way to Hokkaido, Honshu, Shikoku is widespread. Other reserves are found in Korea.