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Betulaceae

  • K. Kubitzki
Chapter
Part of the The Families and Genera of Vascular Plants book series (FAMILIES GENERA, volume 2)

Abstract

Deciduous, anemophilous trees or shrubs; branchlets sometimes differentiated into long and short shoots; bark close or exfoliating in thin layers, often marked with prominent lenticels; winter buds naked or covered with two smooth, valvate, stipular scales or with few to many imbricate scales. Leaves simple, petiolate, alternate, spirally arranged, or distichous, blades serrate, abaxially sometimes covered with resinous glands, pinnately veined; stipules present, free, deciduous. Plants monoecious, flowers unisexual, much reduced. Inflorescences pendulous or erect catkins, consisting of reduced, 3-flowered cymules, or reduced to compact clusters of several minute flowers (florets); catkins terminal or lateral on the branchlets; staminate catkins precocious or developing during the current season, pendulous, conspicuously bracteate, the scales consisting of 1–5 fused bracts; pistillate inflorescences erect to pendulous, bracts 1–5 per scale, variously fused and often large and subfoliaceous or woody in the infructescence.

Keywords

Staminate Flower Pistillate Flower Arnold Arbor Partial Inflorescence Floating Leaf 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

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  • K. Kubitzki

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