cladode

(phylloclade) A specialized stem structure resembling and performing the functions of a leaf. Examples are the stem joints or pads in Opuntia (prickly pears) and the 'leaves' of Ruscus aculeatus (butcher's broom). In these genera the true leaves are reduced to spines or scales respectively. The formation of cladodes is an adaptation to arid conditions. A cladode may be distinguished from a leaf by the presence of buds on its surface. Compare phyllode.