Banksia prolata subsp. calcicola

'Banksia prolata'' subsp. calcicola' is a subspecies of Banksia prolata''. It was known as 'Dryandra longifolia'' subsp. calcicola' until 2007, when Austin Mast and Kevin Thiele sunk all Dryandra into Banksia''. Since the name Banksia longifolia had already been used, Mast and Thiele had to choose a new specific epithet for D. longifolia and hence for this subspecies of it. As with other members of Banksia ser. Dryandra, it is endemic to the South West Botanical Province of Western Australia.