The correct option is: (b) phyllode
Explanation:
Parkinsonia aculeata is a xerophyte. In Parkinsonia aculeata, the rachis ends in a spine. Rachis branches are elongated, flattened and green to function as phyllodes (petioles modified into leaf like structure). They bear small leaflets which fall *** very early. Winged fruit has special flat our growths or wings, shows dispersal by wind. In Cypsela, the hairy pappus functions as umbrella of parachute. Phylloclades are flattened green stems of unlimited growth which have taken over the function of photosynthesis.
