Lysiosepalum rugosum, also known as the wrinkled-leaf lysiosepalum, is a species of flowering plant in the mallow family and is endemic to the south-west of Western Australia. It is shrub with its young branches covered with woolly, star-shaped hairs, and has narrowly egg-shaped leaves and blue, purple of pink flowers usually in groups of 4 to 6.
Lysiosepalum rugosum grows is a shrub that typically grows to a height of and has its young branches with woolly, star-shaped hairs. The leaves are narrowly egg-shaped, long and wide on a petiole long with stipules about long and wide at the bottom of the petiole. The flowers are blue, purple of pink, usually borne in groups of 6 to 8 on a peduncle long with linear or spoon-shaped bracts long at the base, each flower on a pedicel long with linear to egg-shaped bracteoles long at the base of the sepals. The six sepal lobes are egg-shaped or elliptic, long and wide, and there are sometimes dark red petals long. Flowering occurs from July to October and the fruit is about long and wide.[1] [2]
Lysiosepalum rugosum was first formlly described in 1863 by George Bentham in his Flora Australiensis from specimens collected near the Swan River Colony by James Drummond.[3] The specific epithet (rugosum) means "wrinkled", referring to the surface of the leaves.[4]
Wrinkled-leaf lysiosepalum grows in a range of soils, but usually on lateritic gravels in open woodland and shrubland, and is widely distributed from north-east of Geraldton to Manmanning in the Avon Wheatbelt, Coolgardie, Geraldton Sandplains and Jarrah Forest IBRA bioregions of south-west Western Australia.