小二仙草科

Habit: shrub, herb

Important diagnostics: aquatic plants

Taxon group: dicots

Leaf: position: opposite, alternate, verticillate/whorled

Leaf: nature: compound

Leaf: blade: margin: lobed, cleft, parted or divided

Flowers: inflorescence: solitary, corymb, panicle

Flowers: sexuality: bisexual, unisexual

Flowers: sepal number/calyx lobes: 0, 2, 3, 4

Flowers: petal number/corolla lobes: 0, 2, 3, 4

Stamen: number: 2, 3, 4, 5, 6, 7, 8

Pistil: style: styles more than 1

Pistil: ovary: 1-loculed, 2-loculed, 3-loculed, 4-loculed

Pistil: ovule: 1 per locule

Ovary: position: half-inferior, inferior

Fruit: types and characters: a nut (incl. achene, caryopsis, schizocarp, pyrene, etc.), fleshy (berry, drupe, pome), winged/samara

Fruit: seed: winged

Seed: endosperm: seeds with endosperm

Google Image Search: Link

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

Vascular Plant Type Catalog at NYBG: Link