Hakea petiolaris Meisn. subsp. angusta Haegi, Fl. Australia 17B: 395 (1999)

T: 38 miles [60.8 km] E of Pingaring, W.A., 29 May 1969, A.S.George 9341; holo: PERTH; iso: BRI, CANB, K, MEL, NSW.


Shrub or small tree 2.5–5 m tall; resprouting capacity unknown. Branchlets densely appressed-sericeous or glabrescent by flowering.

Leaves elliptic to narrowly so, 7.2–15 cm long (including petiole 0.2–0.5 cm long), 2.3–4 cm wide, narrowly cuneate to attenuate at base, gradually long-acuminate, pale grey-green, surfaces glabrescent but minutely papillose by flowering time; longitudinal veins usually (1–) 3 (–4); reticulate veins prominent above and below.

Inflorescence axillary or at leafless node, sometimes resprouting in subsequent years, with 120–200 flowers; pedicels 8–9.5 mm long, glabrous. Perianth cream turning pinkish mauve. Pistil 14–18 mm long, cream-white; gland a V-shaped flap, 0.5–0.6 mm high.

Fruit elliptic, 2.3–2.5 cm long, 1.1–1.3 cm wide, curved at base, obscurely or not beaked, not flanged. Seed obliquely ovate, 14–22 mm long; wing extending broadly down both sides of body (narrower on one side), sometimes narrowly around base also, blackish brown to black.

Distribution and ecology

Known from a small number of collections from granite outcrops at and to the east of Pingaring, W.A.

To plot an up to date distribution map based on herbarium collections for this species see Australia's Virtual Herbarium. Localities outside the native range may represent cultivated or naturalised records.

Flowering time

Flowers Mar. and May.

Derivation of name

From angustus, Latin for narrow, a reference to the narrowness of the leaves of this subspecies in comparison to the other two.


How the infraspecific taxa differ

Subspecies trichophylla differs from ssp. angusta by its spathulate rather than elliptic leaves and by its abruptly acuminate rather than gradually acuminate leaf apex.

 Subspecies petiolaris differs from ssp. angusta by its spathulate rather than elliptic leaves, its leaves 5.5-8.6 cm long (including petiole) rather than 7.2-15 cm long and by its fruits being ovate and 3.1-3.6 cm long and 1.8-1.9 cm wide compared to the elliptic fruits of ssp. angusta, which are 2.3-2.5 cm long and 1.1-1.3 cm wide.


Part of Sect. Conogynoides recognised by Bentham (1870) and characterised by a conical pollen presenter, veined leaves, glabrous perianth and fruits without horns.


Within this section 3 species were assigned to the informal Petiolaris group by Barker et al. (1999). This group of Hakea species was combined morphologically because they all have flat, subpetiolate leaves, unusual spherical or sub-spherical inflorescences, long pistils and down-curved fruits.


Species are H. laurina, H. obtusa and H. petiolaris, all from SW WA. The monophyly or otherwise of the group has still to be tested.

Representative specimens

W.A.: Pingaring Rock, K.Newbey 2807 (PERTH).


Link to FloraBase treatment of this species for WA.

Further illustrations

J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 88 (2006)