Are Sempervivum and Sagittaria both aquatic plants?
Sempervivum: Sempervivum (Brit. Sagittaria: Sagittaria is a genus of about 30 species of aquatic plants whose members go by a variety of common names, including arrowhead, duck potato, katniss, "Omodaka" (沢瀉 in Japanese), swamp potato, tule potato, and wapato (or wapatoo).
no