Rhadinothamnus euphemiae, is a slender, small, upright shrub with needle-shaped branchlets thickly covered with silvery scales and tubular greenish-purple tubular flowers throughout the year.

Rhadinothamnus euphemiae is a small, slender, upright shrub to 1 m (3 ft 3 in) high with needle-shaped branchlets densely covered in silvery scales.

The leaves are mostly dense on short lateral branches, narrowly triangular tapering to a slender petiole, 1–2 cm (0.39–0.79 in) long, with two spreading lobes, leathery, smooth, occasionally rough or sparsely covered in scales on the upper surface, underneath densely covered in short matted star-shaped hairs.

[2][3][4] This species was first formally described in 1863 by Ferdinand von Mueller who gave it the name Nematolepis euphemiae and published the description in Fragmenta Phytographiae Australiae.

[7][8] Rhadinothamnus euphemiae grows usually in sandy, rocky hillsides and outcrops from the Eyre Range east to Mount Ragged on the south coast of Western Australia.