Hakea decurrens is a semi-prostrate to erect scrambling bush or small tree 0.4–5 m (1–20 ft) tall. Smaller branches have short densely matted silky hairs, occasionally some quickly becoming smooth. Leaves are needle-shaped, widely spreading horizontally, are 1.5–8 cm (0.6–3 in) long and 0.7–1.6 mm (0.03–0.06 in) wide. The smooth leaves are grooved on the underside ending with a sharp point 1–3.5 mm (0.04–0.1 in) long. Theinflorescence consists in 1-6 white or pink flowers on a short white or rusty slightly hairy or densely matted hairy short stalk. The hairs extending onto a 1.2–4.8 mm (0.047–0.19 in) longpedicel. The smoothperianth is 4.2–7.2 mm (0.17–0.28 in) long. Thestyle is 8.5–12.2 mm (0.33–0.48 in) long. A profusion of flowers appear in leaf axils from May to September. The grey woody fruit are broadly egg-shaped, 1.8–3.5 cm (0.7–1 in) long and 1–3 cm (0.39–1.2 in) wide, covered in distinct warts ending in a prominent beak with two small horns.[3][4][5][6][7]
The distribution of the three subspecies is as follows:
H.decurrens subsp.decurrens, occurs on the western slopes and plains of theGreat Dividing Range of New South Wales;[6][7]
H.decurrens subsp.platytaenia, occurs in exposed coastal heaths in southeastern New South Wales, eastern Victoria and theBass Strait Islands.[6][7]
H.decurrens subsp.physocarpa, occurs in New South Wales, Victoria and the Bass Strait Islands. In Tasmania it is thought to be native to the north and naturalised in the south. It is also naturalised in theMount Lofty Ranges in South Australia and Portugal.[6][7]
^ab"Hakea decurrens".VicFlora-Online. Royal Botanic Gardens Victoria. Retrieved27 February 2019.
^Holliday, Ivan (2005).Hakeas a Field and Garden Guide. Reed New Holland.ISBN1-877069-14-0.
^Wrigley, John W.; Fagg, Murray (1989).Banksias, Waratahs & Grevilleas & all other plants in the Australian Proteaceae Family. Collins Australia.ISBN0-7322-0020-2.
^abcdefgh"Hakea decurrens".Flora of South Australia. South Australian Government. Retrieved27 February 2019.
^abcdefgWilson, Annette; Barker, Robyn M.; Haegi, Laurence A.; Barker, William R., eds. (1999).Flora of Australia(PDF). Vol. 17B. Canberra/Melbourne: ABRS-Department of Environment & Heritage.ISBN0-643-06454-0.
