Which are the largest and smallest flowering plants?

Chinese Wisteria is the world's largest flowering plant. it can grow branches over 150 metres long and can produce about one and a half million flowers each year.

Bolivian bromeliad ( Puyaraymondii) is another large plant, whose spike reaches a height of ten metres with 8000 flowers on it.

Wolffia punctata, a duckweed, is the smallest flowering plant. It floats on water and forms large floating masses on ponds. It is a very small plant and has one or two disc-like leaves and hanging roots. The smallest plant can measure half a millimetre across.