Karri 'Karri Knight' in the Valle de Canas, Valle de Canas, Centro, Portugal

This page contains specific information about Karri (Eucalyptus diversicolor) '8314', which can be found in the Valle de Canas in Valle de Canas (municipality of Coimbra).

This tree is called "Karri Knight". Dr. Dean Nicolle, an Australian scientist specialising in Eucalyptus (see: http://www.dn.com.au/index.html), visited Spain and Portugal in November 2010 to see some of the largest and tallest eucalypts in these countries. He was accompanied by Gustavo Iglesias and other foresters. The "Karri Knight", a Eucalyptus diversicolor, was already known as the tallest tree of the Iberian peninsula. It is surrounded by several other eucalypts of different species of over 60 m tall as well as the tallest Bunya (Araucaria bidwillii) measured anywhere.

For a report with photos by Dean Nicolle, see: http://git-forestry-blog.blogspot.com/feeds/posts/default?orderby=updated

In September 2015 a team from the UK with arborist Syd Howells, climbing expert Vicky Tough and photographer Andrew Walmsley climbed this tree and measured it to be 72.9 metres. They spent two days as well as a night up in the tree. For the story see: http://www.tentsile.com/blogs/news/53682948-karri-karri-knight-a-night-of-wonder

The Karri Knight is now the tallest reliably measured tree in Europe. There are reports of still taller Caucasian Firs (Abies nordmanniana) from the Russian Western Caucasus, but there are reliable measurements only up to 60.5 m (see https://www.monumentaltrees.com/en/rus/adygey/maykopskiy/19771_kavkazskiyzapovednik/37187/).

Girth growth rate

The girth was measured more than once:

Year	Girth @1.3 m	Measurement	Girth growth rate
2010	5.68 m	Dean Nicolle	-
2017	5.71 m	Giant Trees Foundation	0.4 cm/year
2024	6.03 m	Treeriders	5 cm/year

The growth rate shown in the table shows the yearly average increase in girth since the last measurement. This value only gives an indication of the growth rate, since every measurement could be done at slightly different heights and during different periods of the year.

Height

The height was measured more than once:

Year	Height	Measurement	Measurement method
2010-11	72 m	Dean Nicolle	Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method
2015-09	72.90 m	Syd Howells	Climbing with direct tape drop
2017-01-04	73 m	Giant Trees Foundation	Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method
2024-04-03	~75.20 m	Treeriders	Laser with Three-point measurement (e.g. Nikon Forestry Pro) or clinometer (e.g. Forestor Vertex) - tangent method

Each measurement can be have been done with varying accuracy.

Age

The age of the tree was estimated by these persons:

Year	Planting or germination year	Age	Measurement
May 12, 2012	1890 � 10	135 � 10 y	Jeroen Philippona
Apr 4, 2024	1873 � 1	152 � 1 y	Treeriders

$\text{[math]}$ Show on map � $\text{[math]}$ Download GPX � $\text{[math]}$ Edit data of this tree � Add new measurement � $\text{[math]}$ Remove

Photos

The photos are provided by Treeriders.