SWEET CHESTNUT

Castanea sativa

Beech [Fagaceae]

flowers8jul flowers8july

flower
flower8yellow
petals
petalsZ0
type
typeZcatkins
stem
stem8round

24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
Hanging out over the canal...


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
Tree covered in Ivy hiding bark, leaving just the leaves visible.


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
Leaves semi-glossy, wavy along the lines of the veins.


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
Leaves alternate on thin branches, larger leaves near the end of the branch, rear ones smaller and angled backwards. Leaves start suddenly, widen gradually, then taper abruptly to a point. Forwardly directed teeth.


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
The fruits are golf-ball sized spheres covered in extremely sharp spines each pointing in differing directions. They fall to the ground when ripe.


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
It is impossible to pick one up without having at least a few spines painfully piercing the skin no matter how gingerly you try to pick it up! An extremely effective deterrent against any bird or mammal who may so dare to try and get at the sweet chestnut within.


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
The stiff spines emerge and branch at every which angle from several centres all over the fruit case.


30th Sept 2011, Hayfield, Derbyshire. Photo: © RWD
When ripe the spiny fruit case splits into three releasing the brownish sweet chestnuts.


30th Sept 2011, Hayfield, Derbyshire. Photo: © RWD


24th Sept 2011, Ranby, Chesterfield Canal. Photo: © RWD
Dead leaves hang from the tree like brown handkerchiefs before dropping off.


Easily confused with other: Beech Trees [a plant of similar name]

Lookee-Likees : Flower

Uniquely identifiable characteristics

Distinguishing Feature : The extremely spiny golf-ball-sized fruit with edible (after cooking) Sweet Chestnut within.

No relation to : Horse-Chestnut [trees with a similar name].

An ELLAGITANNIN


Tellimagrandin II (aka Eugeniin) is an Ellagitannin. At its heart is a glucose sugar surrounded by five galoyl units, the two on the upper right being joined by a bridging bond. It is almost identical to the ellagitannin Potentillin, the only difference being that it lacks the bond joining the two lowest galoyl groups. It is present also in the non-native Clove plant (Syzygium aromaticum).

The dimer of Tellimagrandin II is Cornusiin E which is found in Fringe Cups (Tellima grandiflora), from which it obviously derives its name. Cornusiin E parallels the dimer of Potentillin called Agrimoniin, the two are almost identical, apart from two missing bridging bonds between the galoyl groups at the bottom of the diagram.

ANY TEXT GOES HERE


Distribution
 family8Beech family8Fagaceae
BSBI maps
genus8Castanea
Castanea
(Sweet Chestnut)

SWEET CHESTNUT

Castanea sativa

Beech [Fagaceae]

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