There is one pedunculate oak (Quercus robur)
behind the farm in Manthorpe in Manthorpe (county of Lincolnshire)
This tree is called "The Bowthorpe Oak"
. This oak at Bowthorpe Farm near Manthorpe village is the biggest girthed Pedunculate Oak in the UK. Only two Sessile Oaks have a marginally larger girth, but their trunks are more ruined by time. The age of the Bowthorpe oak is disputed. There has been some research done on the tree's growth rings in the 1970s, but as the tree is totally hollow, this can only be done for the outer shell of wood (information Jeroen Pater - Monumentale Bomen in Europa
, 2006). The growth of these outer rings has been extrapolated and the oak was estimated to be about 550 years old, so now nearing 600 years. An old source, a notation by a Mr. Howell at the back side of a gravure of the tree of 1804, writes that the tree was hollow and had a girth of 37 ft (11.3 m). The slow growth of the girth since then made several writers think the tree could be 1000 years old. It is not possible to be sure of the age, but a margin of 600 - 1000 years seems to be fairly safe.
Girth growth rate
The girth was measured more than once:
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.
The height was measured more than once:
|2006-04||~12 m ||Jeroen Pater||Measurement method unknown|
|2006-04-06||~15 m||Jeroen Pater||Measurement method unknown|
Each measurement can be done with varying accuracy.
The age of the tree was estimated by these persons:
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The Bowthorpe Oak (pedunculate oak "3478")
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