Types of Alder

Alnus acuminata is a tree species widespread in Central and South America. This species has a wide distribution. There are some known pests and pathogens in parts of its range and some wild harvesting occurs, but these factors do not currently present a significant threat to the species.

Alnus maritima (also called Seaside Alder) is a species of plant in the Betulaceae family. Alnus maritima is endemic to the United States, and is found naturally in three disjunct populations in Oklahoma, Georgia, and in Maryland and Delaware on the Delmarva Peninsula.

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

Alder is the common name of a genus of flowering plants (Alnus) belonging to the birch family Betulaceae. The genus comprises about 35 species 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.

The grey alder has a shallow root system, and is marked not only by vigorous production of stump suckers, but also by root suckers, especially in the northern parts of its range. The wood resembles that of the black alder, but is somewhat paler and of little economic value.

Alder trees by the Beaulieu River at Longwater Lawn, England. Alder is the common name of a genus of flowering plants (Alnus) belonging to the birch family Betulaceae.The genus comprises about 35 species 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 ...