Australian Impressionism might not be as well known as its French counterpart, but this late 19th-century art movement was important to the country.

An extraordinary collection of Australian art, including works by Arthur Streeton, Sidney Nolan, Margaret Preston and Brett Whiteley, is about to go to auction with an estimated value of $9 million.

Showcasing one of the NGV's largest loans, 'Floribunda' will bring a whole new world of flowers to Narre Warren.