Buckeye Plant Information


Buckeye grows in the following 38 states:

Connecticut, District Of Columbia, Georgia, Illinois, Indiana, Kansas, Kentucky, Maryland, Minnesota, Mississippi, Nebraska, New Hampshire, North Carolina, Oklahoma, Pennsylvania, South Carolina, Wisconsin, Oregon, West Virginia, Alabama, Arkansas, California, Delaware, Florida, Iowa, Louisiana, Maine, Massachusetts, Michigan, Missouri, New Jersey, New York, Ohio, Rhode Island, Tennessee, Texas, Virginia, Washington


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More information about Buckeye may be found here, or from the US Department of Agriculture.

Linnaeus named the genus Aesculus after the Roman name for an edible acorn. Common names for these trees include "buckeye" and "horse chestnut". Some are also called white chestnut or red chestnut. In Britain, they are sometimes called conker trees because of their link with the game of conkers, played with the seeds, also called conkers.The genus Aesculus (/skjᵿls/ or /aɪskjᵿls/) comprises 13-19 species of flowering plants in the soapberry and lychee family Sapindaceae. They are trees and shrubs native to the temperate Northern Hemisphere, with 6 species native to North America and 7-13 species native to Eurasia. There are also several hybrids. Aesculus exhibits a classical arcto-Tertiary distribution.[a]

Aesculus species have stout shoots with resinous, often sticky, buds; opposite, palmately divided leaves, often very large-to 65 cm (26 in) across in the Japanese horse chestnut Aesculus turbinata. Species are deciduous or evergreen. Flowers are showy, insect- or bird-pollinated, with four or five petals fused into a lobed corolla tube, arranged in a panicle inflorescence. Flowering starts after 80-110 growing degree days. The fruit matures to a capsule, 2-5 cm (2532-1 3132 in) diameter, usually globose, containing one to three seeds (often erroneously called a nut) per capsule. Capsules containing more than one seed result in flatness on one side of the seeds. The point of attachment of the seed in the capsule (hilum) shows as a large circular whitish scar. The capsule epidermis has "spines" (botanically: prickles) in some species, while other capsules are warty or smooth. At maturity, the capsule splits into three sections to release the seeds.
Aesculus seeds were traditionally eaten, after leaching, by the Jōmon people of Japan over about four millennia, until 300 AD.
All parts of the buckeye or horse chestnut tree are moderately toxic, including the nut-like seeds. The toxin affects the gastrointestinal system, causing gastrointestinal disturbances. The USDA notes that the toxicity is due to saponin aescin and glucoside aesculin, with alkaloids possibly contributing.
Native Americans used to crush the seeds and the resulting mash was thrown into still or sluggish waterbodies to stun or kill fish. They would then boil and drain (leach) the fish at least three times in order to dilute the toxin's effects. New shoots from the seeds also have been known to kill grazing cattle.
The genus has traditionally been treated in the ditypic family Hippocastanaceae along with Billia, but recent phylogenetic analysis of morphological and molecular data has caused this family, along with the Aceraceae (Maples and Dipteronia), to be included in the soapberry family (Sapindaceae). The species of Aesculus include:
The most familiar member of the genus worldwide is the common horse chestnut Aesculus hippocastanum. The yellow buckeye Aesculus flava (syn. A. octandra) is also a valuable ornamental tree with yellow flowers, but is less widely planted. Among the smaller species, the bottlebrush buckeye Aesculus parviflora also makes a very interesting and unusual flowering shrub. Several other members of the genus are used as ornamentals, and several horticultural hybrids have also been developed, most notably the red horse chestnut Aesculus carnea, a hybrid between A. hippocastanum and A. pavia.
Interpretations of the tree leaves can be seen in architectural details in the Reims Cathedral.
Media related to Aesculus at Wikimedia Commons Data related to Aesculus at Wikispecies


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