With a few exceptions, alders are deciduous, and the leaves are alternate, simple, and serrated. The flowers are catkins with elongate male catkins on the same plant as shorter female catkins, often …

Alder, 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 …

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 · Alder (Alnus) is a genus of flowering deciduous trees in the family Betulaceae. There are about 35 alder species, comprising of large trees and smaller shrub-like trees. Many species of …

Dec 29, 2024 · There are two main types of alder trees: red alder (Alnus rubra) and black alder (Alnus glutinosa). Red alder trees are primarily found in North America, particularly in the Pacific Northwest, …

Alder (Alnus glutinosa) is the most common tree in wetland forests, and it improves soil fertility through its ability to fix nitrogen from the air. Common or black alder occurs throughout most of Europe and …

Oct 23, 2024 · Depending on the species, they can grow from small, multi-stemmed shrubs to tall trees up to 35 meters in height. The leaves of alder trees are usually simple, alternate, and can range from …

Alder trees are closely related to birch trees, as they both belong to the same scientific family. There are several dozen species of alder trees, all belonging to the Alnus genus. Alder trees grow primarily …

Common alder can be found along riversides, and in fens and wet woodlands. Its exposed roots provide shelter for fish, and its rounded leaves are food for aquatic insects.

Feb 10, 2025 · Explore the unique characteristics, types, and historical significance of Alder trees. Learn essential care tips, uses, and interesting facts about these remarkable trees.