Please answer the following question: Dryadoideae - The Dryadoideae subfamily of the Rosaceae consists of four genera all of which share root nodules that host the nitrogen-fixing bacterium Frankia. They are sub-shrubs shrubs or small trees with a base chromosome number of 9 whose fruits are either an achene or an aggregate of achenes. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Plant