Tetratheca decoraTetratheca decora, also known as black-eyed susan, is a species of plant in the quandong family that is endemic to Australia.DescriptionThe species grows as a small, erect shrub to 30–40 cm in height. The deep lilac-pink flowers have petals 6–15 mm long, appearing mainly from September to November.Distribution and habitatThe plants have a scattered distribution across central eastern New [South Wales] from the Warrumbungles to the Nowra, [New South Wales|Nowra] area, occurring in heath and dry sclerophyll forest on sandstone substrates.