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 ?
Class T was divided into six levels corresponding to the six red alder trees. Height was divided into two levels corresponding to either the upper or lower tree sections.
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.
``There is a high social and economic cost and, if not controlled, it can develop into asthma.'' The season can start as early as January when hazel and alder trees release pollen.
The first bluebell carpets bloomed 16 days early and leaves appeared on alder trees 13 days earlier than usual.
Larvae of the hook-tip moth, a common resident of birch and alder trees in the northeastern United States, spin silk stitches to create folded-leaf retreats, explains Jane Yack of Cornell University.
Alder trees do have an amazing ability to spring up and thrive on land that has been ravaged by fire, earthquakes or logging.
"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.
Prince Charles wanted the kitchen cupboards made from home-grown oak and the floor made of tiles crafted from 100-year-old alder trees.
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.