The most recognizable member of the genus globally is the common horse chestnut Aesculus hippocastanum. The yellow buckeye Aesculus flava (syn. A. octandra) is also a precious ornamental tree with yellowish blossoms, but is less extensively put. Among the species that is smaller, the bottlebrush buckeye Aesculus parviflora additionally makes a flowering shrub that is very intriguing and uncommon.
Several other members of the genus are used as ornamentals, and lots of horticultural hybrids also have been developed, most notably the red horse chestnut Aesculus * carnea, a hybrid between A. hippocastanum and A. pavia.
Aesculus was recorded as truly one of the 38 materials used to prepare Bach flower treatments, a form of alternative medicine encouraged for its effect on well-being. Yet according to Cancer Research UK, “there’s no scientific evidence to show that flower treatments can restrain, treat or prevent any kind of disorder, including cancer”.