Leucospermum lineare is an evergreen shrub with linear leaves and is assigned to the Proteaceae. There are two distinct forms that have not been formally recognized as separate taxa. There is an upright form with orange flower heads of up to 2 m (6.6 ft) high, and a sprawling form of 2–3 m (6.6–9.8 ft) in diameter with yellow flower heads. Its common name is needle-leaf pincushion, or narrow-leaf pincushion, in English and smalblaarspeldekussing in Afrikaans. The orange-flowered form is called tangerine pincushion or assegaaibos pincushion. Flowering occurs in the first half of the southern hemisphere season, but peaks in September and October. It is an endemic species that can only be found in the southwest of the Western Cape province of South Africa.