alder

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Related to alder trees: Alnus, Ash trees

alder

(ôl`dər), name for deciduous trees and shrubs of the genus Alnus of the family Betulaceae (birchbirch,
common name for some members of the Betulaceae, a family of deciduous trees or shrubs bearing male and female flowers on separate plants, widely distributed in the Northern Hemisphere. They are valued for their hardwood lumber and edible fruits and as ornamental trees.
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 family), widely distributed, especially in mountainous and moist areas of the north temperate zone and in the Andes. The black alder (A. glutinosa) is an Old World species now naturalized in E North America. Its bark, still used for dyes and tanning, was formerly considered medicinal; its wood is useful chiefly as charcoal. A. rugosa, the speckled alder, forms extensive swamp thickets in Eurasia and North America. The red alder (A. rubra), the largest tree of the genus, is the most important hardwood timber tree in its native region, the Pacific coast of North America. Alder trees are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Fagales, family Betulaceae.

alder

[′ȯl·dər]
(botany)
The common name for several trees of the genus Alnus.

alder

A moderately light-colored, light-weight hardwood that changes to flesh color or light brown when dried; often stained to simulate cherry, mahogany or walnut; often used as plywood core and crossbanding.

alder

1. any N temperate betulaceous shrub or tree of the genus Alnus, having toothed leaves and conelike fruits. The bark is used in dyeing and tanning and the wood for bridges, etc. because it resists underwater rot
2. any of several similar trees or shrubs
References in periodicals archive ?
This species occurs extensively in the alder tree forests of the Galician-Portuguese Sector but is completely absent in the Lacian-Ancarensean and Galician-Asturian sectors (the Navia river is the sole exception).
While the majority of the red alder trees harvested in the Pacific Northwest are 12 inches in diameter or less, these Alaska trees regularly top 20 inches in diameter.
Our biggest problem is that we've got too many dollars chasing too few alder trees," he says.
Visitors can see what is the easily-discernible former bed of the Wear, now thickly populated by alder trees.
A fine mixture of pine oak willow alder trees have been planted.
There are tangles of alder trees and we have been told by experts that their rootstock could be up to 1,500 years old," says Austen.
The alder trees in the area were once the raw material for the clog industry.
The first frogs are spawning in our garden ponds; crocus and snowdrops can be seen flowering below the catkins of hazel and alder trees.
The valley has stunted alder trees that were once a valuable raw material for the manufacture of clogs.
Bear right (now on another long distance path - the Staffordshire Way) to an idyllic spot where the alder trees look down on the the stepping stones over the brook.
slender trunk of a fallen alder tree wedged between rocks whipped