Wattles growing nearest the coast are generally the earliest in the year to flower, followed by those further inland. Similarly, the tide of yellow sweeps from north to south, as the wattles in the northerly parts of Australia flower first, followed by the more southerly species.
The Acacia genus, which includes all the wattles, is the biggest group of trees and shrubs in Australia, topping even the eucalypts in diversity. They were part of the original Gondwana vegetation, which is why, today, acacias are also found in Africa, South America and India.
This post is part of the Floral Friday Fotos meme