Andersonia simplex is an erect or ascending, scaly shrub that typically grows to a height of 10–60 cm (3.9–23.6 in).

[3][2] Andersonia simplex was first formally described in 1859 by Sergei Sergeyevich Sheglejev, who gave it the name Homalostoma simplex in the Bulletin de la Société impériale des naturalistes de Moscou from specimens collected by James Drummond.

[4][5] In 1917, George Claridge Druce transferred the species to Andersonia as A. simplex in a supplement to The Botanical Exchange Club and Society of the British Isles Report for 1916.

[7] This species of Andersonia grows in a sandy and gravelly soils north of Albany to the Stirling Range National Park, in the Avon Wheatbelt, Esperance Plains and Jarrah Forest bioregions of southern Western Australia.

[2] Andersonia simplex is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.