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]

Jul 25, 2024 · Alder trees (Alnus spp.) include 30 species of trees in the birch family. Learn their main characteristics, growing tips, and how to identify them.

Nov 16, 2022 · 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. Alders grow as tall shade trees or large shrubs that thrive in marshy, damp ground.

Dec 25, 2023 · 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.

The Black Alder (Almus glutinosa, Gærtn.), native of Europe, Asia and North Africa, is the most picturesque of water-loving trees, with its dark green, round or oblong leaves glutinous when they unfold in the spring. The trees are tall and erect, with dark trunks.

Alnus glutinosa, the common alder, black alder, European alder, European black alder, or just alder, is a species of tree in the family Betulaceae, native to most of Europe, southwest Asia and northern Africa.

Feb 26, 2024 · Alder trees grow primarily in northern, western, and coastal regions of the United States. They are commonly found in states such as California, Oregon, Washington, Montana, Idaho, Colorado, and Alaska. Check out here for more interesting facts about alder trees.

Oct 23, 2024 · Alder Buckthorn (not a true alder, but often confused with them, Frangula alnus) Description: A shrub or small tree with glossy leaves, and inedible berries that turn from red to black. Distribution: Native across Europe, into North …

Alder is the only British native deciduous tree to develop cones. Alder is native to almost the whole of continental Europe (except for both the extreme north and south) as well as the United Kingdom and Ireland.

Red Alder is a host to nitrogen-fixing bacteria that form nodules on tree roots. Because of this association, the introduction of Red Alder to disturbed sites can quickly improve the fertility of soils, making the site more amenable to colonization by longer-living conifers.