In Opuntia the stem is modified into a flattened green structure to perform the function of leaves (i.e., photosynthesis).
Write some other examples of modification of plant parts for the purpose of photosynthesis.
(i) Photosynthesis roots, eg., Trapa, Tinospora.
(ii) Phyllode (flattened petiole), eg., Acacia longifolia
(iii) Foliaceous stipules, eg., Lathyrus aphaca.