Indian Horse Chestnut

Aesculus indica

Physical Characteristics

Aesculus indica is a deciduous Tree growing to 30 m (98ft) by 12 m (39ft). See above for USDA hardiness. It is hardy to UK zone 7 and is not frost tender. It is in flower from June to July, and the seeds ripen in October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Distribution

E. Asia - North-western Himalayas.

Habitats

Woodland Garden Canopy;

Edible Uses

Edible Parts: Seed Edible Uses: Seed - cooked. It can be dried, ground into a powder and used as a gruel[2, 63, 145, 146, 158]. The seed is roasted then eaten in Nepal[272]. It is also dried then ground into a flour and used with wheat flour to develop the flavour when making bread[272]. The seed is quite large, about 35mm in diameter[194], and is easily harvested. Unfortunately it also contains toxic saponins and these need to be removed before it can be eaten. The seed is used as an emergency food in times of famine when all else fails[177]. It is dried and ground into a powder, this is then soaked in water for about 12 hours before use in order to remove the bitter saponins and can be used to make a 'halva'[194]. It is estimated that mature trees yield about 60kg of seeds per annum in the wild[194]. See also the notes above on toxicity.

Medicinal Uses

Acrid Anthelmintic Antirheumatic Astringent Narcotic Stomachic The seed is astringent, acrid and narcotic. An oil from the seed is applied externally in the treatment of skin disease and rheumatism. The juice of the bark is also used to treat rheumatism. A paste made from the oil cake is applied to the forehead to relieve headaches. The seed is given to horses suffering from colic. It is also used as an anthelmintic on horses to rid them of intestinal parasites.

Known Hazards

The seed is rich in saponins[20, 65]. Although poisonous, saponins are poorly absorbed by the human body and so most pass through without harm. Saponins are quite bitter and can be found in many common foods such as some beans. They can be removed by carefully leaching the seed or flour in running water. Thorough cooking, and perhaps changing the cooking water once, will also normally remove most of them. However, it is not advisable to eat large quantities of food that contain saponins. Saponins are much more toxic to some creatures, such as fish, and hunting tribes have traditionally put large quantities of them in streams, lakes etc in order to stupefy or kill the fish[K].