Lobelia rhombifolia, commonly known as tufted lobelia, is an annual plant from southern Australia. It is 0.05 to 0.3 metres high and produces purple flowers with a white throat and two recurved upper lobes. These appear at different times across their native range: \n* September to December in Western Australia \n* October and November in South Australia \n* November in Victoria \n* October to February in Tasmania The species was first formally described in 1845 by German botanist Johann Lehmann in Plantae Preissianae.