The flowers of some Wolfia species are as small as 1/70th inch while A. minutissimum has flowers about 1.5 mm (about 1/17th inch) in length.
Wolffia.
water meal or wolffia globosa
The world's smallest flower is Wolffia, also known as the watermeal. These tiny flowers are less than 1 millimeter in size and float on the surface of water bodies.
The Rafflesia arnoldii is known as the world's largest flower, with blooms that can grow up to 3 feet in diameter. The Wolffia globosa, also known as the watermeal, is considered the world's smallest flower, with individual plants measuring less than 1 millimeter.
wolffia globosa is a flower which measures 0.4 to 0.9 mm.It is an aquatic plant which is edible or can be eat.
Minute rootless aquatic herbs having globular fronds floating on or near the water surface and bearing one flower per frond. Species of the genus Wolffia are the smallest flowering plants. Commonly called watermeal, these aquatic plants resemble specks of cornmeal floating on the water. Source: Answers.com
The largest flower is Raffleshia.
Daisy
touch me not plant
largest flower in world is Rafflesia armondi the diameter of this flower is one and a half meter long smallest flower in world is Woiffia microscopica
The smallest flowering plant is the genus Wollfia, flowers are about 1mm across
The Water Meal or Wollfia globosa