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Black Alder

Alnus glutinosa
Betulaceae

Tree (shrub) up to 20 m tall, often with more stems, with sparse crown. The bark is gray, later brown, rough, scaly or lamellar. Leaf blade obovate, in the youth sticky with 5 to 8 pairs of lateral-veins. Edge of leaf irregularly 2x serrated, top obtuse. Face and other side of the leaf hairless (only near veins may be hairy). Woody female cones pedunculated, hard, shape ovoid to elliptical. The fruit is small, flat achene with a narrow opaq edge. The achene is round to pentagonal,red- brown, shiny. Shoots: Shoots glabrous, sticky, at the top white-frosted. Natural range: Europe (outside the most northern part), the Western Asia; in our area domestic.

Buds

Buds with 2 cover scales, with pedicles, obtuse sharp, glabrous, blue-frosted, sticky.

Leaves

Leaves are simple. The lamina is rounded, obovate. In youth sticky, with 5 to 8 pairs of lateral veins. The margin is irregularly twice serrated, the tip is dull or cut out. Both the face and underside are glabrous (only in vein axils can be pilose). The basis is wedgewise tapered. In autumn the leaves drop of green. The petiole is 1-2 cm long.

Fruits

Woody female cones pedunculated, hard, shape ovoid to elliptical. The fruit is small, flat achene with a narrow opaq edge. The achene is round to pentagonal,red- brown, shiny.
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