| Habitat, North of Europe. 
AMENTALS. 72 BIRCHWORTS. 
THE AMENTAL ALLIANCE (V. K., p. 248.) 
Natural Orvers of Amentals. . ~ 
Birchwarts (Betulacee.) Ovary 2-celled. Ovule 1, pendulous. 
Liquivambars (Altingiacee.) Ovary 2-celled. Ovules 00, winged. 
WAMom=worts (Salicacee.) Ovary l-celled. Ovules 00, cottony. 
Natural Order, Birchwarts ; Betulacece (V. K., p. 251.) 
Prevailing Quality. Astringent, subacrid. 
Atyus. Tournefort. 
Stamens 4. Nuts angular, wingless. 
1. A. glutinosa Gertner.—(The AvER TREE.) Fig. 108. = 
Leaves roundish, very obtuse, wedge-shaped at the base, with the axils of 
the veins of the underside 
bearded. 3 
. Habitat. Marshy places in Europe. 
Quality. Bark astringent, tonic. 
Uses. Gargles, ague, &e. 
Betuta. Linneus. 
Stamens, 10-12. Nuts winged 
1, B. nigra Linneus. — ( 
Brack Brrcs.) 
Leaves ovate-rhomboid, doubl 
serrated, downy beneath, 
entire at the base ; scales 
of female catkins downy. 
Gualty, ‘Taree, bleamie. 
ality. acrid, ba! Ce oe 
Uses, Yields birch eamphor; timber 
very hard and valuable. 
2. B. alba Linneus. — ( 
Common Brrcu.) 
Leaves somewhat rhomb 
doubly serrated, sm 
scales of female 
108 hairless. 
Quality. Bark yields the empyreumatic birch oil. 
Uses. Employed in dressing anais leather ; timber of inferior quality. 
Fig. 108.—Alnus glutinosa. 
