Stylidium affine is a species in the genus Stylidium (family Stylidiaceae) that is endemic to Western Australia.
Stylidium affine is a perennial plant that possesses long erect or recurved lanceolate leaves. Leaves are 12–30 cm (4.7–11.8 in) long, 2–4 mm wide, and arranged in groups of 2–4, emerging from a basal papery sheath, having the overall appearance of a tuft. Inflorescences are paniculate, 20–30 cm (7.9–11.8 in) long, and densely glandular. Peduncles have 1–3 flowers, which are rose pink ...