genus of plants From Wikipedia, the free encyclopedia
A birch tree is a thinleaved deciduous hardwood tree of the genus Betula.[2] They are in the family Betulaceae, which also includes alders, hazels, and hornbeams.
| Birch Temporal range: | |
|---|---|
| |
| Silver birch | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Fagales |
| Family: | Betulaceae |
| Subfamily: | Betuloideae |
| Genus: | Betula L. |
| Subgenera | |
| |
 | |
| Range of Betula | |
| Synonyms[1] | |
| |
Betula contains 30 to 60 species of which 11 are on the IUCN 2011 Green List of Threatened Species. They are usually rather short-lived pioneer species widespread in the Northern Hemisphere.[3]
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