Betula Cordifolia - Version 2014.3. Shaw, K., Roy, S., & Wilson, B. In The IUCN Red List of Threatened Species, pages 51207376/0+.
Betula Cordifolia - Version 2014.3 [link]Paper  abstract   bibtex   
[Excerpt] This species has a fairly wide distribution and it is reported to be common across much of its distribution. In other parts of its distribution the species is less common, but there are no known major threats to this species. It is therefore not considered to be threatened and is evaluated as Least Concern. [::Common Name(s)] [::]English - Mountain White Birch, Speckled Birch, Hearleaf Birch [::]French - bouleau à feuilles cordées, bouleau blanc [::Taxonomic Notes] Until recently B. cordifolia~has been regarded as a variety, or a northerly or montane form of B. papyrifera. Furlow (1997) in the Flora of North America~questions whether it deserves specific status. However, the studies of Brittain & Grant (1965b, 1967b) and Grant & Thompson (1975) confirmed the diploid status of B. cordifolia, defined its morphological distinctness, and suggest that it is likely to be one of the constituent genomes of hexaploid B. papyrifera. Reports of tetraploids in B. cordifolia~are likely to be due to the great difficulty in distinguishing between B. cordiolia~and the B. cordifolia~x B. papyrifera~hybrid. [::Range Description] The distribution of this species in the US and Canada is not fully known due to confusion with B. papyrifera. It is most commonly found alongside B. papyrifera in Newfoundland and Labrador and Atlantic Canada generally. Betula cordifolia also~occurs apart from B. papyrifera, at higher altitudes or further north. B. cordifolia~is also present in Nova Scotia. There are relict subpopulations as far south as in the Appalachians, on Black Mountain and neighbouring Mount Mitchell in North Carolina. The species is also found in Vermont and~extends westwards into Ontario and even into Minnesota and may be seen in the hills to the north east of Lake Superior and again in the hills to the south of Thunder Bay.\textasciitilde [::Countries] Native:Canada (Labrador, New Brunswick, Newfoundland I, Nova Scotia, Ontario, Prince Edward I., Québec); Saint Pierre and Miquelon; United States (Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New York, North Carolina, Pennsylvania, Vermont, Virginia, West Virginia, Wisconsin) [::Population] This species is abundant in Newfoundland and Labrador and Atlantic Canada generally, and occurs apart from~B. papyrifera, generally at higher altitudes or further north.~Although the main concentration of the species appears to be in Labrador, Nova Scotia and Newfoundland, there are relict subpopulations of stately trees far to the south in the Appalachians, on Black Mountain and neighbouring Mount Mitchell in North Carolina.~Today this species is scarce in the Appalachians south of New England. In Vermont it is scattered sporadically through a dominant scrub of rather low~B. alleghaniensis. [::Habitat and Ecology] This species occurs as trees of erect habit to 10 m in height. They grow on moist rocky slopes, often with B. alleghaniensis~from Maine southwards above 800-2,000 m asl, or in open Picea mariana~forests in the north. [::Use and Trade] There is no use or trade information available for this species. [::Major Threat(s)] There are no major threats reported for this species.
@incollection{shawBetulaCordifoliaVersion2014,
  title = {Betula Cordifolia - {{Version}} 2014.3},
  booktitle = {The {{IUCN Red List}} of {{Threatened Species}}},
  author = {Shaw, K. and Roy, S. and Wilson, B.},
  date = {2014},
  pages = {51207376/0+},
  url = {http://mfkp.org/INRMM/article/13621315____to-archive},
  abstract = {[Excerpt] This species has a fairly wide distribution and it is reported to be common across much of its distribution. In other parts of its distribution the species is less common, but there are no known major threats to this species. It is therefore not considered to be threatened and is evaluated as Least Concern. [::Common Name(s)] [::]English - Mountain White Birch, Speckled Birch, Hearleaf Birch [::]French - bouleau à feuilles cordées, bouleau blanc [::Taxonomic Notes] Until recently B. cordifolia~has been regarded as a variety, or a northerly or montane form of B. papyrifera. Furlow (1997) in the Flora of North America~questions whether it deserves specific status. However, the studies of Brittain \& Grant (1965b, 1967b) and Grant \& Thompson (1975) confirmed the diploid status of B. cordifolia, defined its morphological distinctness, and suggest that it is likely to be one of the constituent genomes of hexaploid B. papyrifera. Reports of tetraploids in B. cordifolia~are likely to be due to the great difficulty in distinguishing between B. cordiolia~and the B. cordifolia~x B. papyrifera~hybrid. [::Range Description] The distribution of this species in the US and Canada is not fully known due to confusion with B. papyrifera. It is most commonly found alongside B. papyrifera in Newfoundland and Labrador and Atlantic Canada generally. Betula cordifolia also~occurs apart from B. papyrifera, at higher altitudes or further north. B. cordifolia~is also present in Nova Scotia. There are relict subpopulations as far south as in the Appalachians, on Black Mountain and neighbouring Mount Mitchell in North Carolina. The species is also found in Vermont and~extends westwards into Ontario and even into Minnesota and may be seen in the hills to the north east of Lake Superior and again in the hills to the south of Thunder Bay.\textasciitilde{} [::Countries] Native:Canada (Labrador, New Brunswick, Newfoundland I, Nova Scotia, Ontario, Prince Edward I., Québec); Saint Pierre and Miquelon; United States (Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New York, North Carolina, Pennsylvania, Vermont, Virginia, West Virginia, Wisconsin) [::Population] This species is abundant in Newfoundland and Labrador and Atlantic Canada generally, and occurs apart from~B. papyrifera, generally at higher altitudes or further north.~Although the main concentration of the species appears to be in Labrador, Nova Scotia and Newfoundland, there are relict subpopulations of stately trees far to the south in the Appalachians, on Black Mountain and neighbouring Mount Mitchell in North Carolina.~Today this species is scarce in the Appalachians south of New England. In Vermont it is scattered sporadically through a dominant scrub of rather low~B. alleghaniensis. [::Habitat and Ecology] This species occurs as trees of erect habit to 10 m in height. They grow on moist rocky slopes, often with B. alleghaniensis~from Maine southwards above 800-2,000 m asl, or in open Picea mariana~forests in the north. [::Use and Trade] There is no use or trade information available for this species. [::Major Threat(s)] There are no major threats reported for this species.},
  keywords = {*imported-from-citeulike-INRMM,~INRMM-MiD:c-13621315,betula-cordifolia,conservation,forest-resources,iucn,iucn-least-concern-lc}
}
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