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Leaves and flowers. Photo Ivan Holliday.

Flowers and leaves. Photo I.Holliday

Inflorescence and leaf. Photo W.R.Barker

Closed fruits. Photo I.Holliday

Synonymy

Hakea trineura (F.Muell.) F.Muell., Fragm. 6: 216 (1868)

Grevillea trineura F.Muell., Fragm. 3: 146 (1863) [Hakea trineura F.Muell., Fragm. 3: 146 (1863), pro syn.]. T: Broad Sound, s.d., [E.Bowman] s.n.; holo: MEL 674142; ?iso: K p.p.

Description

Multi-stemmed shrub 1–3 m tall, resprouting from base. Branchlets and young leaves appressed brown-pubescent, glabrescent. Leaves: petiole 1–2.5 (–3) cm long; lamina narrowly elliptic to obovate, (3.5–) 7–19.5 cm long, (0.8–) 1.3–7 cm wide, attenuate, obtuse to acute, with mucro 1–2 mm long; longitudinal veins 3, with secondary veins between conspicuously anastomosing.

Inflorescence with c. 60–80 flowers; rachis 40–70 mm long, glabrous or sparsely appressed-pubescent at least in flower-bearing parts; pedicels 2.3–3 mm long, glabrous, mid-green. Perianth 7–8.5 mm long, ±deep yellow, glabrous or with scattered hairs in bud. Pistil 18–26 mm long; style mid-green.

Fruit valves obliquely ovate, 2.5–3.5 cm long, 1.7–2 cm wide; red-brown wood zone 2–3.5 mm wide. Seed narrowly obovate, 18–25 mm long.

Distribution and ecology

Restricted to the Marlborough and Rockhampton area of central coastal Qld, occurring in Eucalyptus open woodland over hummock grassland on hills.

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 May–Sept.

Derivation of name

From tri-, three and neuro, Greek for nerve, a reference to the three longitudinal veins on the leaves of this species.

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Relationships

Referred to the Trineura Group of Barker et al. (1999), these 2 species (H. trineura and H. archaeoides ) have been assumed to be, along with the corkwoods, part of the basal group of Hakea. Both occur in north-eastern regions of Australia.

Bentham referred H. trineura to the Grevilleoides, because it shares the long floriferous inflorescences of the corkwood group, and has oblique pollen presenters, but the flat leaves of these two species have a very obvious venation and the fruits are woody.

Conservation status

This species was treated as 'Vulnerable' in J.D.Briggs & J.H.Leigh, Rare or Threatened Australian Plants (1995).

See the current list of Hakea species gazetted in the Threatened Flora of  the Australian Government's Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act).

H. trineura: approved conservation advice (approved Oct. 2008).

H. trineura is classified as vulnerable underQueensland’s Nature Conservation (Wildlife) Regulation 2006

Representative specimens

Qld: 1.6 km N of Marlborough HS, M.Lazarides 6881 (CANB); Mt Slopeaway, near Marlborough, N.H.Speck 1752 (BRI, CANB, NSW).

Weblinks

Link to PlantNET treatment for NSW.

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 208-9 (2005)

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