'extended-leaved' originates from the combination of 'extend' and 'leaf', where 'extend' meant 'to stretch out' and 'leaf' refers to the foliage of a plant.

'extended-leaved' is a modern English term formed by combining 'extended' and 'leaved', reflecting the characteristic of having elongated leaves.

Initially, it meant 'having leaves that are stretched out', and this meaning has remained consistent in modern usage.