Alder
| Alder Temporal range: | |
|---|---|
| Common alder (Alnus glutinosa) | |
| Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Betulaceae |
| Subfamily: | Betuloideae |
| Genus: | Alnus Mill. |
| Type species | |
| Alnus glutinosa (L.) Gaertn. | |
| Synonyms | |
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Genus synonyms
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Alders are trees of the genus Alnus in the birch family Betulaceae. The genus includes 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.