Ptilotus arthrolasius is a species of flowering plant in the family Amaranthaceae and is endemic to north-western Australia.

It is a compact perennial herb or shrub with oblong to lance-shaped leaves, and spikes of maroon to pink flowers with five fertile stamens.

Ptilotus arthrolasius is a compact perennial herb or shrub that typically grows to 20–75 cm (7.9–29.5 in) high, has many branches, and is covered with short, yellow hairs.

[2][3] Ptilotus arthrolasius was first formally described in 1868 by Ferdinand von Mueller in his Fragmenta Phytographiae Australiae from specimens he collected near "Sturt's Creek".

[5] This species of Ptilotus is widespread in the Carnarvon, Central Ranges, Dampierland, Gascoyne, Gibson Desert, Great Sandy Desert, Little Sandy Desert, Murchison, Ord Victoria Plain, Pilbara and Tanami bioregions of northern Western Australia and the Northern Territory, where it grows in pebbly red loam on sandplains and sand dunes.