Crataegus x grignonensis #1 at Bute Park

Crataegus x grignonensis 0

Crataegus x grignonensis
mid May 2016

Crataegus x grignonensis 1

Crataegus x grignonensis
mid September 2016

Crataegus x grignonensis 2

Crataegus x grignonensis in fruit
mid October 2016

Grid reference ST 17616 77375
Common name Grignon's thorn
Origin Garden origin
Deciduous Yes
Status Rather rare
Status Wales Champion 2016
Tag 2747
Old tag 159
Height 6M May 2016
Girth 101cm May 2016
Reference 433

This tree is roughly in the centre of the Hawthorn group. No thorns were seen on the tree.

The following table gives the approximate physical measurements of examined haws together with the number of pips found within them.

Diameter mm Length mm No. of pips
17.0 20.0 1
18.0 21.0 1
15.0 18.0 1
16.0 18.0 1
13.0 16.0 1

Measurements were taken in late October 2017.

Crataegus x grignonensis bark

Crataegus x grignonensis bark
mid May 2016

Crataegus x grignonensis flower

Crataegus x grignonensis flowers
mid May 2016

Crataegus x grignonensis flower2

Crataegus x grignonensis flowers
mid May 2016

Crataegus x grignonensis flower3

Crataegus x grignonensis leaves & flowers
mid May 2016

Crataegus x grignonensis leaf

Crataegus x grignonensis leaves
early June 2016

Crataegus x grignonensis fruit1

Crataegus x grignonensis fruit
late August 2016

Crataegus x grignonensis fruit2

Crataegus x grignonensis fruit
late August 2016

Crataegus x grignonensis foliage

Crataegus x grignonensis fruit
late October 2020

Crataegus x grignonensis fruit3

Crataegus x grignonensis fruit
late October 2016

General tree description

Crataegus x grignonensis is a hybrid of Crataegus pubescens f. stipulacea. It is a small tree, up to about 4 metres tall, with an upright and untidy shape. It has white flowers in May/June and large, bright red fruits which ripen late. The leaves remain green until winter.