Habit: herb
Important diagnostics: aquatic plants
Taxon group: dicots
Leaf: blade: margin: entire
Flowers: sexuality: bisexual
Flowers: symmetry: actinomorphic
Flowers: perianth nature: perianth of similar segments
Flowers: sepal number/calyx lobes: 4
Pistil: carpel: 2, 3, 4, 5, 6+
Pistil: ovary: 3-loculed, 4-loculed, 5-loculed, 6-loculed, 7+ loculed
Pistil: pistil: carpels free from each other
Ovary: position: half-inferior, inferior
Fruit: types and characters: fleshy (berry, drupe, pome)
Google Image Search: Link
Dictionary of The Families & Genera of Chinese Seed Plants: Link
Vascular Plant Type Catalog at NYBG: Link
