Morphological differences that demonstrate the transition from  to  include  species having leaves with more veins and larger bundle sheath cells. Also, species such as Cleome gynandra produce proteins needed for  photosynthesis.
The morphological distinctions between species transitioning from to are characterized by enhanced vein networks within their leaves and larger bundle sheath cells. The plant species Cleome gynandra is mentioned as an example that produces proteins essential for photosynthesis.