Pomaderris grandis, commonly known as large pomaderris, is a species of flowering plant in the family Rhamnaceae and is endemic to a restricted part of the south-west of Western Australia. It is an erect shrub that typically grows to a height of and produces white flowers from July to October. It grows in rocky gullies on the slopes of Mount Manypeaks in the Esperance Plains biogeographic region of south-western Western Australia.[1] The species was first formally described in 1862 by Ferdinand von Mueller in his Fragmenta Phytographiae Australiae.[2] [3] It is listed as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions, meaning that it is rare or near threatened.[4]