The chief trees of the country are the aspen (Populus tremuloides), the ash-leaved maple (Negundo aceroides), oak (Quercus alba), elm (Ulmus Americana), and many varieties of willow.
Some sclerophyllous forests of the eastern Atlas Mountains are, owing to a comparatively high rainfall, characterized by many deciduotis trees, such as Fraxinus oxyphylla, Ulmus campestris (auct.
The mountains are clothed, where the fall of rain is abundant, with forests of Quercus, Fagus, Ulmus, Acer, Carpinus and Corylus, and various Coniferae.
Mongolica), maple (Acerginala, Max.), ash (Fraxinus manchurica), elm (Ulmus montana), hazel (Corylus heterophylla) and several other European acquaintances.
A narrow tract of land along the coast of the Caspian, known as the "hillocks of Baer," is covered with hillocks elongated from west to east, perpendicularly to the coast-line, the spaces between them being filled with water or overgrown with thickets of reed, Salix, Ulmus campestris, almond trees, &c. An archipelago of little islands is thus formed close to the shore by these mounds, which are backed on the N.