Wolffia is a genus of 9 to 11 species which include the smallest flowering plants on Earth. Commonly called watermeal or duckweed these aquatic plants resemble specks of cornmeal floating on the water. Wolffia species are free-floating thalli green or yellow-green and without roots. The flower is produced in a depression on the top surface of the plant body. It has one stamen and one pistil. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Plant