Phylloclade - 1. It is an aerial stem or branch modification. 2. Here the stem is modified into a flat or cylindrical, succulent and green structure. 3. It arises in the axil of the leaf which falls off, leaving a scar. 4. It bears succession of nodes and internodes at long or short intervals. Example: Opuntia, Casuarina. Cladode - 1. It is an aerial branch modification. 2. Here the branch is also modified into a succulent, green, flat or cylindrical or leaf like structure. 3. May appear in cluster or singly in the axil of scale leaf. 4. It is a phylloclade of mostly one or rarely two internodes only . Example: Asparagus, Ruscus.