角果藻科

Habit: herb

Important diagnostics: aquatic plants

Taxon group: monocots

Stem: rhizome

Plant: monoecious, dioecious

Leaf: position: opposite, alternate, tufted

Flowers: inflorescence: solitary, cyme

Flowers: sexuality: unisexual

Flowers: perianth number: 0, 3

Stamen: number: 1, 2, 3

Pistil: carpel: 1, 2, 3, 4, 5, 6+

Pistil: ovule: 1 per locule

Pistil: pistil: carpels free from each other

Fruit: types and characters: a nut (incl. achene, caryopsis, schizocarp, pyrene, etc.)

Google Image Search: Link

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

Vascular Plant Type Catalog at NYBG: Link