Betula uber
Betula uber | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fagales |
Family: | Betulaceae |
Genus: | Betula |
Species: | B. uber
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Binomial name | |
Betula uber (Ashe) Fern.
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Natural range of Betula uber | |
Synonyms | |
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Betula uber, the Virginia round-leaf birch, is a rare species of
Description
It is a moderately sized tree, growing up to 15 metres (49 ft) tall. The crown is compact. The bark is aromatic and dark brown or black in color.[5] The leaf is round or slightly oval with a heart-shaped base and a toothed edge and measures up to 5 centimetres (2.0 in) long.[5] The catkin is up to 2.8 centimetres (1.1 in) long and contains tiny samaras measuring 2 millimeters in length.[5] The tree is wind-pollinated and reproduces by seed.[6] Seed production is much heavier in some years than in others.[5] The tree's lifespan is around 50 years.[5]
Taxonomy
The tree was first described in 1914 as a variety of Betula lenta,[6] and elevated to species status in 1945.[7] The cladistics of the tree remain unresolved.[8] It hybridizes with B. lenta and it has been suggested that it is actually a round-leaved mutant form of B. lenta.[7][6] Some authorities prefer to treat it as a variety.[5]
Conservation
After it was first discovered in 1914, the tree was not seen again and was thought to be
References
- . Retrieved 23 April 2023.
- ^ "Virginia round-leaf birch (Betula uber)". Environmental Conservation Online System. U.S. Fish & Wildlife Service. Retrieved 23 April 2023.
- ^ a b 43 FR 17910
- ^ a b 59 FR 59173
- ^ a b c d e f g h Sharik, T. Betula uber Revised Recovery Plan. USFWS. 1985. Accessed on 23 April 2023.
- ^ a b c d e f g h i j Davis, E. Five-year Review: Virginia Roundleaf Birch. USFWS. September 2006. Archived 5 June 2016 at the Wayback Machine
- ^ a b Flora of North America Accessed on 23 April 2023.
- ^ "Virginia Roundleaf Birch / Center For Plant Conservation".
- .
- ^ a b NatureServe (7 April 2023). "Betula uber". NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer. Arlington, Virginia: NatureServe. Retrieved 23 April 2023.
External links
- World Conservation Monitoring Centre (1998). "Betula lenta subsp. uber". . Retrieved 16 November 2021.
- USDA Plants Profile