Alders are trees of the genus Alnus in the birch family Betulaceae. The genus includes about 35 species [2] of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes. [1]

2024年7月25日 · Here are 12 common alder trees and shrubs for your landscaping needs. The black alder gets its common name from the dark grey color of the bark in aged trees. Its Latin name, Alnus glutinosa, tips you off that this tree develops a gummy resin on new leaves and buds. Take note that this alder species can become invasive in some areas.

4 天之前 · alder, (genus Alnus), genus of about 30 species of ornamental shrubs and trees in the birch family (Betulaceae). Alders are distributed throughout the Northern Hemisphere and in parts of western South America on cool wet sites at elevations up to 2,500 metres (8,200 feet).

General: Thin-leafed alder is a native, deciduous shrub or tree. The leaves are ovate, double serrated, and pointed at the tip. Male catkins are produced in the autumn in-groups of three or four. The female catkins are borne separately on the same plant in late winter or early spring.

2022年11月16日 · Alder trees (botanical name Alnus) are tall deciduous trees known for their drooping flower clusters and brown woody cones called strobiles. Several species of alder trees are native to North America and Europe, with the Red Alder (Alnus rubra) and Black Alder (Alnus glutinosa) being the two most common.

2023年12月25日 · Alder trees, known scientifically as the genus Alnus, are a captivating group of deciduous trees and shrubs belonging to the birch family Betulaceae. These trees have a wide distribution across the globe, with species native to North America, Europe, Asia, and Africa.

Alder is the food plant for the caterpillars of several moths including the alder kitten, pebble hook-tip, the autumnal and the blue-bordered carpet moth. Catkins provide an early source of nectar and pollen for bees, and the seeds are eaten by the siskin, redpoll and goldfinch.

Black alder is a medium short-lived deciduous tree in the birch family (Betulaceae) native to Europe, western Asia, and northern Africa. Early European colonists brought the black alder to North America where it was planted as an ornamental and to prevent erosion. The genus, Alnus, is Latin for alder.

European black alder, also known as European alder, is a large and often narrow, pyramidal-shaped tree, reaching 40-60 feet at maturity. European alder often grows many suckers around the base of the tree. The leaves are large (up to 4"), simple, ovate to round with doubly toothed margins, and glossy dark green in color.

2022年10月8日 · Alder Tree Identification. The easiest way of recognizing an alder tree is by its distinctive little fruiting body, called a strobile. They appear in fall and look like 1 inch (2.5 cm.) long cones. Strobiles remain on the tree until the following spring, and the small, nutlike seeds they contain supply winter food for birds and small mammals ...