Guichenotia macrantha, commonly known as large-flowered guichenotia, is a species of flowering plant in the family Malvaceae. It is a shrub with grey-green leaves, mauve flowers and is endemic to Western Australia.
Guichenotia macrantha is an open, upright, or sometimes a straggling small or tall shrub to high, wide with new growth covered in star-shaped hairs. The leaves are linear to oblong shaped, upper surface grey-green, long, wide, margins rolled under, lower surface yellowish-green, wrinkled, thickly hairy, rounded apex on a petiole long. The calyx lobes are mauve, pink-purple, sometimes white, each lobe with three distinct ribs, in diameter, divided to halfway, petals deep red, small, pedicel long and peduncles long. The bracts are leaf-like, oval-shaped, long, wide and borne at the base of each pedicel. Flowering occurs from May to September and the fruit is a woody, elliptic-shaped capsule.[1] [2]
Guichenotia macrantha was first formally described in 1846 by Russian botanist Nikolai Turczaninow and the description was published in Bulletin de la Société Impériale des Naturalistes de Moscou.[3] [4] The specific epithet (macrantha) means "large flowered".[5]
Large-flowered guichenotia grows on a variety of soils including clay sands, sands, gravel and granite from the Murchison River to Merredin.