Q:Ruppia also known as the ditch grasses or widgeon grass is the only genus in the family Ruppiaceae. The genus name was given in honour of Heinrich Bernhard Rupp a German botanist (1688-1719).They are widespread outside of frigid zones and the tropics. 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?
A:
Plant