Crataegus x grignonensis #2 at Bute Park

Crataegus x grignonensis 0

Crataegus x grignonensis
late January 2018

Crataegus x grignonensis 1

Crataegus x grignonensis
early May 2018

Grid reference ST 17597 76895
Common name Grignon's thorn
Origin Garden origin
Deciduous Yes
Status Rather rare
Missing tag 3095
Height 5M January 2018
Girth 56.5cm January 2018
Girth 57cm February 2023
Reference 546

This tree is beside the river, 90M north of the Millennium Bridge. No thorns were seen on the tree.

In January 2018 a few fruit remained 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
12.72 16.2 1
12 14.3 1
14.8 18.4 2
15.5 19 2
15.6 16.5 1
12.8 15.9 1
11.2 15 1

Measurements were taken in late October 2020. Length measurement was for main body of the fruit and did not include the peduncle.

Crataegus x grignonensis bark

Crataegus x grignonensis bark
late January 2018

Crataegus x grignonensis fruit

Crataegus x grignonensis remaining fruit
late January 2018

Crataegus x grignonensis leaf

Crataegus x grignonensis new leaves and buds
early May 2018

Crataegus x grignonensis flower

Crataegus x grignonensis flowers & buds
mid May 2018

Crataegus x grignonensis fruit2

Crataegus x grignonensis young fruit & leaves
mid July 2018

Crataegus x grignonensis fruit3

Crataegus x grignonensis fruits
late September 2018

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.