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.
Sessiliflora), of birch (Betula tomentosa), of ash (Fraxinus excelsior), and of beech (Fagus sylvatica).
The ash (Fraxinus excelsior) and the oak make their appearance, the latter (Quercus pedunculata) reaching in isolated groups and single trees as far N.
Mongolica), maple (Acerginala, Max.), ash (Fraxinus manchurica), elm (Ulmus montana), hazel (Corylus heterophylla) and several other European acquaintances.
D-Mannose, first prepared by oxidizing d-mannite, found in plants and manna-ash (Fraxinus ornus), was obtained by Tollens and Gans on hydrolysing cellulose and by Reis from seminine (reserve cellulose), found in certain plant seeds, e.g.