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Sessile oak 'Chêne Emery' in the Forêt de Bercé

This page contains specific information about sessile oak (Quercus petraea) '8221', which can be found in the Forêt de Bercé in Jupilles.

This tree is called "Chêne Emery". This sessile oak for many years was considerd as the tallest oak in the Forest of Bercé, as well as the tallest oak in France. In December 2006, the forestor mr. Yves Gouchet measured many oaks with technology unknown to me. For the Chêne Emery he measured 47 meter.

In another valley in the forest, near the sources of the Hermitiere, however mr. Gouchet found an oak of even 50 m tall.

At the sign near the Emery Oak a height of 47.75 m is reported, measured in 2007.

Myself I measured at 28 and 29 April 2012 an average of 47.4 m (range 47.0 - 47.8 m) for the two highest tops, 2.9 m taller than our tallest laser measurement till then for Quercus petraea. Sisley measured 48.10 m in December 2012, when the tree was totally without leaves. In the Hermitiere valley I found one taller sessile oak of 48.4 m. These are the tallest oaks in Europe measured with laser. For other forests in France, heights to 45 m are reported, in Germany to 44 m.

The Chêne Emery is marked on the topographic maps and easy to find along a forest road to the Fountaine de la Coudre. The extreme height is due to the sheltered location of the valley, the fertile, deep loamy soil and the constant water supply. The climate with relatively mild winters and moderately warm, rainy summers will be sufficiently favorable. It is notable here that the oaks are taller than the surrounding beeches. Several other oaks in the same valley reach heights of 40 to 44 meters. The tallest beech I measured in this valley was 41.4 m.

The girth of the tree, measured at a height of 1.30 m, is 3.41 m (Apr 28, 2012, Jeroen Philippona).


The height was measured more than once:
YearHeightMeasurementMeasurement method
2012-04-2847.40 m Jeroen PhilipponaLaser with Sine method (e.g. Nikon Forestry 550 laser rangefinder)
2012-12-0448.10 mSisleyLaser with Sine method (e.g. Nikon Forestry 550 laser rangefinder)

Each measurement can be done with varying accuracy.This tree was planted around the year 1742 ± 10, which makes it around 273 ± 10 years old (Jeroen Philippona, May 1, 2012).

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The photos are provided by Jeroen Philippona, and Sisley.

Forêt de Bercé, picture by Jeroen Philippona

Forêt de Bercé, picture by Jeroen Philippona

Forêt de Bercé, picture by Sisley, 2012-12-05

Forêt de Bercé, picture by Jeroen Philippona

Forêt de Bercé, picture by Jeroen Philippona

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