2. It is the national flower of Australia, with beautiful flowers and high ornamental value. Sophora japonica flowers can be seen everywhere in Australia and are deeply loved by local people. It is also very common in the carnival in Nice, France, also known as the Robinia Carnival. Robinia pseudoacacia, also known as acacia tree, symbolizes friendship, is suitable for friends to give gifts to each other, shows pure and beautiful friendship, and can bring the relationship closer.