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Betula
The genus Betula, generally known as birch, belongs to the family Betulaceae. There are about 83 recognized species of Betula, all of which are essential ecological components of northern temperate and boreal woodlands in many parts of the world. The species of this genus have a good tolerance to freezing temperature and water deficit, as well as high sensitivity to UV-B exposure. The chemical composition of Betula pubescens Ehrh. and Betula pendula Roth. buds is assessed, providing data on their biological activities. Betula species show antiarthritic, anticancer, antidiabetic, anti-inflammatory, antimicrobial, antioxidant, antiviral, gastroprotective, hepatoprotective and immunomodulatory activities, and the authors propose that it is important to consider the biopharmaceutical properties of the secondary metabolites for further development.
Betulaceae
The New Manual of Vascular Plants of Northeastern United States and Adjacent Canada is a project by The New York Botanical Garden to fully revise and update the classic Manual by Gleason and Cronquist (1991, NYBG Press). As family treatments are completed for the New Manual, these are being made available as downloadable PDFs. The chief goal of the New Manual is to enable identification of all plants growing spontaneously in a vast region (portions or entirety of 22 states and 5 Canadian provinces). The New Manual includes new tools for plant identification for about 5300 species, amounting to 25% of the total botanical diversity of North America north of Mexico. Approximately 20% of the species included are additions to the 1991 Gleason and Cronquist Manual. In addition, the New Manual provides information on morphology, ecology, phenology, geographic distributions, and conservation status for each species. The New Manual will be indispensable to all those interested in North America's rich botanical resources, including students, conservationists, wildlife managers, educators, and gardeners.
World Checklist and Bibliography of Fagales (Betulaceae, Corylaceae, Fagaceae and Ticodendraceae)
Fagales contains full checklists of important, mainly temperate genera such as Alnus (alders), Betula (birches), Corylaceae (hornbeams), Corylus(hazels), Castanea (chestnuts), Fagus (northern beeches), Nothofagus (southern beeches), and Quercus (oaks), describing 531 species, their growth patterns, distribution and conservation status.
Betula
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The Genus Betula
Birches or Betula are among the most attractive and common trees in the landscape and in gardens. The Genus Betula is the first monograph published on this plant group, the species of which have been notoriously difficult to identify. Accounts are given of all known birches found in Europe, Asia and North America, both white and brown barked, and a key for their identification. An invaluable tool for arboriculturalists and professional and amateur gardeners, and will also appeal to lovers of botanical art.
