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Aesculus glabra

Aesculus glabra: Plant
Photo by Ken Fern. High resolution version

Aesculus glabra: Fruit
Photo by Ken Fern. High resolution version

Common name:	Ohio Buckeye	Family:	Hippocastanaceae
Author:	Willd.	Botanical references:	11, 200
Synonyms:
Known Hazards:	The seed is rich in saponins. 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].
Range:	South-eastern and Central N. America - Pennsylvania to Nebraska, south to Tennessee and Oklahoma.
Habitat:	Usually found in moist sites such as river bottoms and streambank soils, but it is sometimes also found on drier sites though does not grow so well there[229].
Edibility Rating (1-5):	1	Medicinal Rating (1-5):	1

Other Common Names:	From various places around the Web, may not be correct. See below.
	Buckeye [E], Buckeye, Ohio [S], Fetid Buckeye [L], Kahle Kastanie [E], Marron Glabre [E], Ohio Buckeye [S,L,P,DEN1,B],
Epithets:	From a Dictionary of Botanical Epithets
	glabra = glabrous;
Systematics:	From a USDA Plants Database
	Order: Sapindales. Horse-chestnut family
Other Range Info:	From the Ethnobotany Database
	France; Germany; Us

Physical Characteristics

A decidious tree growing to 20m. It is hardy to zone 5 and is frost tender. It is in flower from June to July, and the seeds ripen in October. The flowers are hermaphrodite (have both male and female organs). We rate it 1/5 for edibility and 1/5 for medicinal use.

The plant prefers light (sandy), medium (loamy) and heavy (clay) soils. The plant prefers acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It requires moist soil.

Habitats and Possible Locations

Woodland, Canopy.

Edible Uses

Seed.

Seed - cooked[222]. It can be dried, ground into a flour and used as a gruel. The seed is quite large, up to 35mm in diameter[82], and is easily harvested[K]. It is quite rich in saponins and needs to be leached of these toxins before it becomes safe to eat - the Indians would do this by slow-roasting the nuts (which would have rendered the saponins harmless) and then cutting them into thin slices, putting them into a cloth bag and rinsing them in a stream for 2 - 5 days. By this time most of the minerals etc would also have been leached out[K].

Medicinal Uses

Disclaimer

Antispasmodic; Miscellany.

Minute doses of the seed are used internally in the treatment of spasmodic coughs, asthma and internal irritations[222]. It is used externally as a tea or an ointment in the treatment of rheumatism and piles[222].
An extract of the bark has been used as an irritant of the cerebro-spinal system[82].

Other Uses

Soap; Wood.

Saponins in the seed are used as a soap substitute[169]. The saponins can be easily obtained by chopping the seed into small pieces and infusing them in hot water. This water can then be used for washing the body, clothes etc. Its main drawback is a lingering odour of horse chestnuts[K].
Wood - close-grained, light, soft, white, but often blemished by dark lines of decay[82, 229]. It weighs 28lb per cubic foot[235]. It is easy to carve and resists splitting. Ideal to use in making artificial limbs, it is also used for woodenware, pulp etc and is occasionally sawn into lumber[82, 229, 235].

Cultivation details

Prefers a deep loamy well-drained soil but is not too fussy[1, 11].
This species is the state tree of Ohio[229]. Its growth-rate is moderate in the wild, with trees living up to 100 years[229]. In Britain, it grows best in eastern and south-eastern areas of England probably needing a continental climate in order to thrive[126, 200]. Although the trees are hardy when dormant, the new growth can be damaged by late spring frosts[11].
The twigs, bark, flowers and leaves all produce a foetid odour if crushed[229].
Most members of this genus transplant easily, even when fairly large[11].

Propagation

Seed - best sown outdoors or in a cold frame as soon as it is ripe[11, 80]. The seed germinates almost immediately and must be given protection from severe weather[130]. The seed has a very limited viability and must not be allowed to dry out. Stored seed should be soaked for 24 hours prior to sowing and even after this may still not be viable[80, 113]. It is best to sow the seed with its 'scar' downwards[130]. If sowing the seed in a cold frame, pot up the seedlings in early spring and plant them out into their permanent positions in the summer.

Suppliers

For more details of plant suppliers please see our Suppliers Page which lists many more places to look.

Web References

[E] Ethnobotany Data (common names, uses, countries) from the Ethnobotany Database.
[B] Data (Latin & Common names, other references) from the BONAP's Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands.
[S] Image from the Southwest School of Botanical Medicine
[S] Image from the Southwest School of Botanical Medicine
[G] Data (Common Names, Uses, Distribution) from the USDA/ARS NPGS's GRIN taxonomic database.
[P] Data. (uses, distribution, wetland) from the USDA'a Plants database.
[DEN] Data _ Photos (Good Identification info) from the Virginia Tech's Dendrology Deptarments' Tree Fact Sheets.
[HP] Links, Photos, Suppliers from Hortiplex Plant Database

References for the family Hippocastanaceae.

To be included in the Flora of China.

See the PFAF Links Pages for other sources.

Also try Photos and info from the The Plants Database which has 14,000 images.

References

[K] Ken Fern
Notes from observations, tasting etc at Plants For A Future and on field trips.

[1] F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951
Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaces in 1992 by a new dictionary (see [200]).

[11] Bean. W. Trees and Shrubs Hardy in Great Britain. Vol 1 - 4 and Supplement. Murray 1981
A classic with a wealth of information on the plants, but poor on pictures.

[80] McMillan-Browse. P. Hardy Woody Plants from Seed. Grower Books 1985 ISBN 0-901361-21-6
Does not deal with many species but it is very comprehensive on those that it does cover. Not for casual reading.

[82] Sargent. C. S. Manual of the Trees of N. America. Dover Publications Inc. New York. 1965 ISBN 0-486-20278-X
Two volumes, a comprehensive listing of N. American trees though a bit out of date now. Good details on habitats, some details on plant uses. Not really for the casual reader.

[113] Dirr. M. A. and Heuser. M. W. The Reference Manual of Woody Plant Propagation. Athens Ga. Varsity Press 1987 ISBN 0942375009
A very detailed book on propagating trees. Not for the casual reader.

[126] ? The Plantsman. Vol. 6. 1984 - 1985. Royal Horticultural Society 1984
Excerpts from the periodical giving cultivation details and other notes on some of the useful plants including Actinidia and Wisteria species.

[130] ? The Plantsman. Vol. 4. 1982 - 1983. Royal Horticultural Society 1982
Excerpts from the periodical giving cultivation details and other notes on some of the useful plants, including Distylium racemosum and some perennial members of the family Berberidaceae.

[169] Buchanan. R. A Weavers Garden.
Covers all aspects of growing your own clothes, from fibre plants to dyes.

[200] Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992 ISBN 0-333-47494-5
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.

[222] Foster. S. & Duke. J. A. A Field Guide to Medicinal Plants. Eastern and Central N. America. Houghton Mifflin Co. 1990 ISBN 0395467225
A concise book dealing with almost 500 species. A line drawing of each plant is included plus colour photographs of about 100 species. Very good as a field guide, it only gives brief details about the plants medicinal properties.

[229] Elias. T. The Complete Trees of N. America. Field Guide and Natural History. Van Nostrand Reinhold Co. 1980 ISBN 0442238622
A very good concise guide. Gives habitats, good descriptions, maps showing distribution and a few of the uses. It also includes the many shrubs that occasionally reach tree proportions.

[235] Britton. N. L. Brown. A. An Illustrated Flora of the Northern United States and Canada Dover Publications. New York. 1970 ISBN 0-486-22642-5
Reprint of a 1913 Flora, but still a very useful book.

Readers Comments

Aesculus flava

Mike Creel (creelm@scdnr.state.sc.us) Tue Oct 26 20:14:56 1999

Rich, I e-mailed you area about the toxicity of buckeyes. Dr. Duke is an authority in this area. This information should be useful to you.

From: Jim Duke[SMTP:jimduke@cpcug.org]

> Hi Mike; being as sweet as dosen't make it edible.

> I have for the first time in my life a chestnut and a horsechestnut (really I'm growin a local ornamental Aesculus which set seed). harvested in my own yard. I won't eat but one of them.

> I treat all Aesculus as poisonous and think the europeans who are selling horse chestnut are downplaying the poisonous natures.

Note from Rich: detailed information on the active ingredients of this plant have been snipped. You can detailed info at Ethnobotany Database or one of the other online database mentioned above.

Cross references: Plants: Aesculus flava. Genera: Aesculus. Web-pages: PFAF: Edible Trees and Shrubs Hardy in Britain: A-B.

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Plant information taken from the Plants For A Future - Species Database. Copyright (c) 1997-2003.
WEB search engine by Rich Morris - Home Page- Contact Info
Blagdon Cross, Ashwater, Beaworthy, Devon, EX21 5DF, UK.
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This page (UK) http://www.comp.leeds.ac.uk/cgi-bin/pfaf/arr_html?Aesculus+glabra
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