Grevillea elongata, also known as Ironstone grevillea, is a species of flowering plant in the family Proteaceae and is endemic to the south-west of Western Australia. It is a shrub with divided leaves with sharply-pointed linear lobes, and conical or cylindrical groups of white flowers.
Grevillea elongata is a shrub that typically grows to a height of with more or less glabrous branchlets. The leaves are long with three linear, sharply-pointed lobes long and about wide, the lobes often further divided. The flowers are arranged in conical to cylindrical groups on a hairy rachis, each flower on a pedicel long with bracts long at the base. The flowers are white, the pistil long. Flowering occurs from October to December and the fruit is an oblong follicle about long.[1]
Grevillea elongata was first formally described in 1994 by Peter M. Olde and Neil R. Marriott in The Grevillea Book from specimens collected by Olde near Ruabon in 1991.[2] The specific epithet (elongata) means "lengthened".[3]
Ironstone grevillea grows in heath, often near creeks and is restricted to an area near Busselton and Ruabon in the Swan Coastal Plain biogeographic region of south-western Western Australia.
Grevillea elongata is listed as Endangered on the IUCN Red List of Threatened Species and under the Biodiversity Conservation Act 2016 in Western Australia.[4] It is also listed as Vulnerable under the Australian Government Environment Protection and Biodiversity Conservation Act 1999[5] and as "Threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions, meaning that it is in danger of extinction.[6] The main threats to the species are weed invasion, grazing by rabbits, and habitat loss and disturbance.[7] [8]