Wolffia sp. (duck weed) is a floating, aquatic Angiospermic plant. It has the smallest flowers of about 1 mm diameter, while Rafflesia arnoldi (total root parasite) has the largest flowers of about 1 metre diameter.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.