Synonymy

Hakea rugosa R.Br., Trans. Linn. Soc. London 10: 179 (1810)

T: South Coast, Bay X, [Port Lincoln, S.A.], Mar. 1802, R.Brown Iter Austral. 2; syn: AD, BM, DBN, E, G, K, MEL.

Description

Dense divaricate hermaphrodite shrub, 0.7–2 m tall. Branchlets and young leaves white appressed-pubescent. Leaves rigid, terete, 1.5–6 cm long, 0.9–1.3 mm wide, not grooved, glaucous.

Inflorescence with 6–10 flowers; involucre 3.5–4.5 mm long; rachis knob-like; pedicels 2–3.5 mm long, appressed-pubescent, with hairs white or ferruginous; white hairs extending onto perianth. Flowers bisexual. Perianth 3–3.5 mm long. Pistil erect, 4.5–6 mm long; pollen presenter conical, 0.3–0.4 mm high; gland V-shaped, 0.2–0.4 mm high.

Fruit sigmoidal, 1.5–2.2 cm long, 0.7–1.6 cm wide, coarsely rugose; apiculum 3–7 mm long. Seed 9.5–15 mm long; wing ±apical only.

Distribution and ecology

Occurs from Eyre Penin. in S.A. to western Vic., in mallee scrub or coastal heath, usually on sand or loam.

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 Aug.–Oct.

Derivation of name

From rugosus, Latin for somewhat wrinkled, presumed to be a reference to the fruit surface.

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Relationships

Part of Section Hakea of Bentham (as Euhakea) and characterised by a non-conical pollen presenter, leaves without obvious venation, perianths with or without hairs and fruits with or without horns. Barker et al. (1999) recognised a number of informal morphological groups within the section.

The Rostrata group all share the characteristics of pubescent pedicel and perianth, oblique pollen presenter and woody, sigmoid fruits which are retained on the bushes.

Members of the group are H. cyclocarpa, H. epiglottis, H. megadenia , H. rostrata and H. rugosa.

Notes

Specimens from the western end of Kangaroo Is. need to be investigated further as they tend to have larger fruit (2.5–2.8 cm long), and the leaves are not always short and straight as in typical H. rugosa. The most marked specimen of this (J.B.Cleland, Snake Lagoon, AD) does not have any flowers.

A collection by Mueller from rocky declivities towards the source of the Macallister R., Vic., also appears to represent this species.

Representative specimens

S.A.: roadside near Birchmore Lagoon, c. 20 km SW of Kingscote, Hj.Eichler 15442 (AD); c. 15 km E of Meningie, D.Kraehenbuehl 4544 (AD, CANB, MEL); 5 km S of Coulta, Port Lincoln-Elliston, M.E.Phillips s.n. (AD, CANB); Marble Ra., E face W of Marble Range Stn, D.E.Symon 11643 (AD). Vic.: c. 5 km E of Casterton to Dartmoor road along Moonlight Rd, c. 22 km S of Casterton, P.S.Short 1348 (AD, MEL).

Weblinks

Link to SA eFlora treatment.

More photographs of this species can be seen on the Australian National Botanic Gardens site.

Further illustrations

I. Holliday, Hakeas. A Field and Garden Guide 184-5 (2005)

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