scholarly journals Identification and taxonomy of Betula (Betulaceae) in Great Britain and Ireland

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Andy Amphlett
Keyword(s):  
Great Britain ◽  
Betula Pendula ◽  
Full Range ◽  
Betula Pubescens ◽  
Betula Pendula Roth

Floras and identification guides typically do not list the full range of identification features that discriminate between Betula pendula Roth and B. pubescens Ehrh., and some accounts contain errors. Discriminatory identification features are described and illustrated. Introgression from the diploid, B. pendula into B. pubescens is widespread. It also occurs from B. nana L. into B. pubescens, but obviously introgressed examples of the latter are probably rare. Betula pubescens presents the greatest unresolved identification difficulties. Trees identified as B. pubescens subsp. celtiberica (Rothm. & Vasc.) Rivas Mart., particularly in Wales, may be part of the variation within British B. pubescens, due to introgression from B. pendula. The most widespread of the small-leaved forms of B. pubescens is correctly named var. fragrans Ashburner & McAll. Several misapplied names have been given to this taxon, most recently subsp. tortuosa (Ledeb.) Nyman, which does not occur in Europe. Not all small-leaved B. pubescens are var. fragrans; some examples show clear signs of introgression from B. nana, and may be referable to the northern var. pumila (L.) Govaerts.

scholarly journals Effects of Predicted Reduced Summer Rainfall on Growth and Development of Silver Birch (Betula Pendula Roth) and Downy Birch (Betula pubescens Ehrh)

2018 ◽  
Vol 15 ◽  
pp. 28-44
Author(s):  
Dhirendar Kumar Pradhan ◽  
Christine Cahalan ◽  
Sunita Ulak
Keyword(s):  
Climate Change ◽  
Growth And Development ◽  
Betula Pendula ◽  
Global Climate ◽  
Summer Rainfall ◽  
Betula Pubescens ◽  
Silver Birch ◽  
Betula Pendula Roth ◽  
Downy Birch ◽  
Betula Pubescens Ehrh

Climate is one of the major factors that govern the distribution of tree species. Climate change has already affected the growth, structure and distribution of trees and woodlands. Global climate change projections are wetter winters, drier summers and significance changes in temperature regimes in the next few decades. The main objective of this study was to experimentally demonstrate the effects of decline in summer rainfall, as predicted by UKCP09/IPCC, on height and diameter growth in two co-occurring silver birch (Betula pendula Roth) and downy birch (Betula pubescens Ehrh) and provide further understanding of the changes in growth and development in response to a decrease in water availability. One-year-old seedlings were grown in a temperature-controlled greenhouse for eight weeks in a split-plot experimental design. Their height and diameter were measured and analyzed. Result showed that plant height and diameter was significantly reduced with increased water stress. B. pendula showed higher physiological traits indicating that this species can perform better than B. pubescensin water-deficit conditions.

scholarly journals Silviculture of birch (Betula pendula Roth and Betula pubescens Ehrh.) in northern Europe

2009 ◽  
Vol 83 (1) ◽  
pp. 103-119 ◽  
Author(s):  
J. Hynynen ◽  
P. Niemisto ◽  
A. Vihera-Aarnio ◽  
A. Brunner ◽  
S. Hein ◽  
...  
Keyword(s):  
Betula Pendula ◽  
Betula Pubescens ◽  
Northern Europe ◽  
Betula Pendula Roth ◽  
Betula Pubescens Ehrh

scholarly journals Brzoza w lecznictwie ludowym

2020 ◽  
Vol 29 (4) ◽  
pp. 7-20
Author(s):  
ROBERT GRUSZECKI ◽  
IZABELA NIKOŃCZUK ◽  
GRAŻYNA ZAWIŚLAK ◽  
MAGDALENA WALASEK-JANUSZ
Keyword(s):  
Betula Pendula ◽  
Betula Pubescens ◽  
Betula Pendula Roth ◽  
Betula Pubescens Ehrh

Surowce zielarskie brzozy są łatwo dostępne ze względu na powszechne jej występowanie. Roślina ta dostarcza wielu różnych surowców stosowanych zarówno w ziołolecznictwie ludowym, jak i we współczesnej fitoterapii. W tradycyjnych społecznościach surowce te wykorzystywano jednak w znacznie szerszym zakresie. Celem pracy było przedstawienie wykorzystania surowców zielarskich z brzozy w lecznictwie tradycyjnym jako podstawy do dalszych badań nad właściwościami leczniczymi tej rośliny. W pracy analizowano wykorzystanie dwu gatunków: brzozy brodawkowatej (Betula pendula Roth.) i brzozy omszonej (Betula pubescens Ehrh.), gdyż to z nich najczęściej pozyskuje się surowce zielarskie w Polsce. Surowce te w tradycyjnej medycynie ludowej wielu krajów świata stosowano w stanie świeżym i wysuszonym, w formie naparów, wywarów, ekstraktów alkoholowych i wodnych. W tradycyjnych społecznościach surowce brzozy znalazły zastosowanie w leczeniu bardzo wielu schorzeń, spośród których najczęściej wymieniano choroby układu moczowego, reumatyzm, schorzenia dermatologiczne, kardiologiczne, choroby przewodu pokarmowego, osłabienia, przeziębienia. Surowce te wykorzystywano nawet w leczeniu chorób zakaźnych (czerwonka, tyfus, gruźlica) i nowotworowych.

Development of a Technique for Obtaining Polysaccharides from Leaves of the Birch (Betula pendula Roth. and Betula pubescens Ehrh.)

2020 ◽  
Vol 46 (7) ◽  
pp. 1310-1316
Author(s):  
K. I. Rovkina ◽  
S. V. Krivoshchekov ◽  
A. M. Guriev ◽  
M. S. Yusubov ◽  
M. V. Belousov
Keyword(s):  
Betula Pendula ◽  
Betula Pubescens ◽  
Betula Pendula Roth ◽  
Betula Pubescens Ehrh
Sign in / Sign up

Export Citation Format

Share Document