沟繁缕科

Habit: shrub, herb

Important diagnostics: aquatic plants

Leaf: position: opposite, verticillate/whorled

Leaf: nature: simple

Leaf: blade: margin: entire

Leaf: stipules: present

Flowers: inflorescence: solitary, cyme

Flowers: sexuality: bisexual

Flowers: symmetry: actinomorphic

Flowers: sepal number/calyx lobes: 2, 3, 4, 5

Flowers: sepal position: all free from one another

Flowers: petal number/corolla lobes: 2, 3, 4, 5

Flowers: petal position: all free from one another

Stamen: arrangement: same number as petals or sepals, twice or more number as petals or sepals

Pistil: ovary: 3-loculed, 4-loculed, 5-loculed

Ovary: position: superior

Fruit: types and characters: a capsule (incl. pod, follicle, etc.)

Google Image Search: Link

Dictionary of The Families & Genera of Chinese Seed Plants: Link

Vascular Plant Type Catalog at NYBG: Link