Alder is particularly noted for its important symbiotic relationship with Frankia alni, an actinomycete, filamentous, nitrogen-fixing bacterium. This bacterium is found in root nodules, …

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 …

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 …

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 …

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 …

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 …

The genus, Alnus, is Latin for alder. The species name, glutinosa, is reflective of the sticky texture of its young leaves and stems. This tree will grow 40-60 feet tall and 20-40 feet wide with …

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 …

Learn how to identify Alder trees with our comprehensive guide. Discover key features, habitat, and tips for recognizing Alder in the wild.