Bulbil watsonia (Watsonia bulbillifera) is the most invasive of the six Watsonia species naturalised in Western Australia. Corms form on the stem, giving the plant a distinctive silhouette after the orange flowers have died. Ranging from the size of a rice grain to a large marble, these corms are carried along natural watercourses and in roadside drains. Bulbil watsonia also spreads by seed. It is a serious weed, particularly in damp areas of the south-west and on the south coast.
Better on black.
