Amongst broadleaved trees Juglans has a similar Holarctic range, descending to the West Indies; so has Aesculus, were it not lacking in Europe; it becomes tropical in South America and Malaya.
Trees, and even new genera, such as the cork-tree (Phellodendron amurense, walnut (Juglans manchurica), acacia (Maackia amurensis), the graceful climber Maximowiczia amurensis, the Japanese Trochostigma and many others - all unknown to Siberia proper - are met with.
WALNUT (Juglans), a botanical genus of about ten species (nat.
Juglans - Walnut.
In Casuarina, Juglans and the order Corylaceae, the pollen-tube does not enter by means of the micropyle, but passing down the ovary wall and through the placenta, enters at the chalazal end of the ovule.