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Flora of Australia Online

Hakea decurrens R.Br., Suppl. Prodr. Fl. Nov. Holl. 27 (1830)

Hakea tenuifolia var. decurrens (R.Br.) Domin, Biblioth. Bot. 89: 592 (1921). T: Barren Lands of the Western Interior, s.d. [1818], C.Fraser 41 [Oxley 2nd Expedition ]; lecto: BM, fide W.R.Barker, J. Adelaide Bot. Gard. 17: 189 (1996); remaining syntype: Oxley's 2nd Expedition, s.d. [1818], [C.Fraser ] 46 ; syn: BM; ?isosyn: G-DC.

Hakea brachyrrhyncha F.Muell., First Gen. Report 17 (1853), nom. nud. ; Meisn., in A.L.P.P. de Candolle, Prodr. 14: 401 (1856), pro syn. under Hakea acicularis

[Hakea acicularis var. lissosperma auct. non (R.Br.) Benth.: G.Bentham, Fl. Austral. 5: 515 (1870), p.p.

[Hakea sericea auct. non Schrad. & J.C.Wendl.: A.J.Ewart, Fl. Victoria 407 (1931), p.p. ; N.T.Burbidge, Fl. Austral. Cap. Terr. 146 (1970), p.p. ; J.H.Willis, Handbook Pl. Victoria 2. Dicot. 51 (1973), p.p.

Small trees or shrubs, 0.3–5 m tall, lignotuberous. Branchlets appressed-sericeous or tomentose, persistent or quickly glabrescent. Leaves widely spreading, grooved below to varying extents, 1.5–8 cm long, 0.7–1.6 mm wide, glabrous or rapidly glabrescent; apex porrect, with mucro 1–3.5 mm long. Inflorescence axillary umbel of 1–6 flowers; rachis simple, 0.5–2.8 mm long, with tomentose or appressed white and/or ferruginous hairs, extending onto pedicels; pedicels 1.2–4.8 mm long. Perianth 4.2–7.2 mm long, glabrous. Pistil 8.5–12.2 mm long. Fruit 1.8–3.5 cm long, 1–3 cm wide, finely or coarsely tuberculate, obliquely ovate to broadly ovate; beak small to moderately large, sparsely pustulate or smooth; horns 1–5 mm long; valves with pale wood extending c. 3/4 way to style base. Seed 17–23 mm long, 6.5–10.5 mm wide; wing 3/4 to fully down one side only, dark blackish brown with hyaline network of minute areoles. 

A widespread species, found from eastern N.S.W. to Vic. and Tas., also naturalised in S.A. and Portugal. 

Three subspecies are recognised, separated predominantly on branchlet and pedicel indumentum and fruit size.

(R.M.Barker, L.Haegi, W.R.Barker)

1 Branchlets with tomentose hairs, often persisting for several seasons; red-brown wood zone of valve 3–5 mm wide near seed base (small shrubs in coastal windswept heaths of south-eastern N.S.W., E Vic. and Bass Strait Is.)

subsp. platytaenia

1: Branchlets with appressed hairs, usually quickly glabrescent, sometimes persisting until flowering; red-brown wood zone of valve 1–2.5 mm wide near seed base

2

2 Fruit in median view ovate to obovate, 1.4–1.9 cm wide; pale wood zone 3.5–6 mm wide, 2-layered, with outer layer 1–2.5 (–3) mm wide

subsp. decurrens

2: Fruit in median view ovate to elliptic or broadly so, 1.5–3.6 cm wide; pale wood zone (4.5–) 6–12 mm wide, 2-layered, with outer layer 2.5–5.5 mm wide

subsp. physocarpa

 

Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia