File:Кора - летен дъб и зимен дъб.jpg

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Български: Съпоставка на кората на два близки вида - летен дъб (Quercus robur, ляво) и зимен дъб (Quercus petraea, дясно).
English: Bark comparison of two common oak species - Quercus robur (left, winter shot) and Quercus petraea (right, summer shot) reveals that they are quite distinct in key morphological aspects. The selected trees are of almost identical stem diameters. My observations of average (app. 40 to 90 y.o.) trees from those species as follows:
  • Quercus robur - bark segments hard and usually bulgy, short, overall the bark is more often darker - blackish or brownish.
  • Quercus petraea - bark segments flaky and flat or often as long, jagged ridges, overall the bark is dark grey to whitish.
Date
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Author Димитър Найденов / Dimìtar Nàydenov

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current07:11, 27 November 2018Thumbnail for version as of 07:11, 27 November 20184,800 × 3,200 (11.36 MB)Utar Sigmal (talk | contribs)User created page with UploadWizard

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