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 ?
Library officials speculated the hawks might be feeding on the rats or rabbits that live in the ivy below the alder trees.
Six red alder trees were selected from an uncultivated site as representative specimens.
In most of Southeast Alaska, red alder trees line the roads.
Crystal clear waters flow over a rumbling of rocks in these creeks, forming pools that reflect the shiny green leaves of alder trees.
The season can start as early as January when hazel and alder trees release pollen.
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.
After a stop at the visitor center, where the film is screened, the tour buses climb through a river valley that is exhibiting remarkable resiliency, again home to alder trees, Douglas fir, salmon, rainbow trout and elk.
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.