close-up of the spikey capsule and colorful foilage of aesculus hippocastanum, the horse chestnut.

aesculus also america autumn avenues background blue branches brown buckeye called capsule chestnut close colorful conker deciduous europe european fall family flowering foilage fruits growing hermaphroditicflowered hippocastanum horse horsechestnut horseshoe large like lychee nut parks plant sapindaceae season seeds sky soapberry sometimes spanish species specific spikey stout synoecious tree