Some similarities to : Red Horse-chestnut but that has red instead of white flowers.

Uniquely identifiable characteristics

Distinguishing Feature :

No relation to : Sweet Chestnut [a tree with similar name which belongs to the Beech Family] and from which chestnuts for roasting are obtained from.

The fruits of the Horse-chestnut are what children obtain 'conkers' from, which are not the chestnuts used for roast chestnuts. The colloquial word 'conker' gives rise to the slang use of 'conk' for a 'head'. The word 'nut' for 'head' is derived similarly from the 'chestnut'.

Seedlings readily form, but they hardly ever progress to become saplings or trees. The Horse-chestnut tree grows outwards rather than upwards, giving rise to the words in a song 'under the spreading chestnut tree'.

Conkers are mildly poisonous, containing saponins. One such saponin, aescin [which is actually the name for a mixture of saponins] (from the latin Genus Aesculus for 'chestnut') is a powerful remedy for sprains and bruises. This vindicates the bygone use of conkers by the Turkish people for precisely the same ailment. The natural saponins within conkers are also used by shampoo and shower-gel manufacturers in order to claim a 'naturelle' element to their products. Some children have died from poisoning after eating conkers mistaking them for sweet chestnuts, which they resemble.

Beta-aescin, a triterpene saponin, is the main component of aescin, and has a structure similar to Hederin (β-).

Aesculin (not to be confused with Aescin, the triterpene saponin) is a poisonous coumarin glycoside, related to 4-hydroxycoumarin, from which modern rodenticides were originally developed, such as warfarin, a bi-coumarin. Aesculetin, is the direct coumarin pre-cursor of Aesculin.

During the World Wars, conkers were gathered to extract the starch from them, which was subsequently converted to Acetone using a process invented by Chaim Weizmann.

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