capsule-d fruits with a green spiny shell of the horse chestnut tree aesculus hippocastanum

aesculus background bierzo branch capsule capsuleshaped chestnut closeup dehiscent esculin external false forest fresh fruit fruits green harvest health hemolysing hippocastanum horse indoor inedible ingredient large leaf leaflets leaves natural nature organic petiole phagaceae plant poison sapindaceae saponin seeds shell similarity spain spiny surrounded thorns toxic toxicity tree trees wrapping