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Dwarf White Birch Betula minor (Tuckerman) Fern. |
Dicots |  Printer Friendly Version (PDF) |
Family: Birch Family (Betulaceae)
State Protection: Endangered 
listed species are those with: 1) 5 or fewer extant sites, or 2) fewer than 1,000 individuals, or 3) restricted to fewer than 4 U.S.G.S. 7 ? minute topographical maps, or 4) species listed as endangered by U.S. Department of Interior. Federal Protection: Not Listed State Rarity Rank: S1
A State Rarity Rank of S1 means: This plant is endangered/critically imperiled in New York because of extreme rarity (typically 5 or fewer populations or very few remaining individuals) or is extremely vulnerable to extirpation from New York due to biological factors. Global Rarity Rank: G4Q
A Global Rarity Rank of G4Q means: Apparently Secure globally - Uncommon in the world but not rare; usually widespread, but may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. The Q indicates this species? status as a distinctive full species is uncertain. Did you know? This species was orginally described as only a variety of the taller, more common paper birch, and the species name "minor", which means smaller, was probably chosen to reflect that this species resembles a smaller version of paper birch. |
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| State Ranking Justification | [-] |
There are three known extant populations and a fourth population that needs to be verified. A fifth population has not been seen since 1958 but may still be extant. All of these populations are very small (under 50 individuals), are restricted to the alpine regions of the highest summits of the Adirondacks, and occur within about 5 air miles of each other.
| Short-term Trends | [-] |
There are no clear data indicating how the populations are doing in the short-term.
| Long-term Trends | [-] |
One population has not been seen since 1958 although it has been looked for. Therefore, further survey work is needed to determine if this population is still extant. The other three confirmed populations each have under 50 individuals. Overall, long-term trends are unclear but may indicate a decline.
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Home | Advanced Search | About Us Animal Guides | Plant Guides | Community Guides © 2004-2012 New York Natural Heritage Program, a partnership between the New York State Department of Environmental Conservation and the State University of New York College of Environmental Science and Forestry Please cite this page as:
New York Natural Heritage Program. 2013. Online Conservation Guide for Betula minor. Available from: http://www.acris.nynhp.org/guide.php?id=8868. Accessed June 20th, 2013. 
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