Mustard plant contains alternate phyllotaxy and actinomorphic flower. Alternate phyllotaxy: In this type of leaf arrangement, a single leaf arises at each node in an alternate manner, e.g. China rose, Mustard, Sunflower, etc. Actinomorphic: When a flower shows radial symmetry, it is called an actinomorphic flower, e.g. Mustard, Datura, Chilli, etc.