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Flowering branch. Photo W.R.Barker

Inflorescences. Photo W.R.Barker

Fruits and inflorescences. Photo W.R.Barker

Note secondary venation (Wege 1528). Photo K.Shepherd

Synonymy

Hakea anadenia Haegi, Fl. Australia 17B: 394 (1999)

T: 28 km E of Jurien on road to Brand Hwy at 30°14'S, 115°18'E, W.A., 15 Nov. 1983, L.Haegi 2673 & P.S.Short; holo: PERTH; iso: AD, MEL.

Description

Bushy shrub, 0.3–2 m tall, ?lignotuberous. Branchlets patchily appressed-pubescent with colourless hairs at flowering. Leaves narrowly elliptic to obovate, shallowly concave, undulate towards margins, 2.7–8.5 cm long, 6–20 mm wide, narrowly attenuate at base, spinulose-dentate, acute to acuminate; longitudinal veins 1–3, prominent above and below; secondary venation reticulate, prominent.

Inflorescences 1 or 2 per axil, with 14–20 flowers per raceme; pedicels glabrous. Perianth white to pink. Pistil 4–6 mm long; gland vestigial or absent.

Fruit obliquely narrowly ovate, 1.7–2.3 cm long, 0.8–1.1 cm wide, usually beaked. Seed obliquely ovate, 12–15 mm long; wing extending unevenly fully or partly down both sides of seed body, sometimes notched near base, black.

Distribution and ecology

Occurs in the Eneabba to Moore R. area near the west coast of W.A., and in the Pingelly–Narrogin area east of the Darling Ra.; grows in scrub-heath, sometimes with mallee or low woodland, in sandy soil.

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 July–Oct.

Derivation of name

From an-, Greek prefix for without and adenos, Greek for gland, a reference to the lack of a gland in the flowers of this species. Anadenia has also been used as the name of a genus. This genus was based on Hakea undulata, a species closely related to this one. Anadenia is now considered to be a synonym of Hakea.

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Relationships

Part of the Conogynoides group recognised by Bentham and characterised by a conical pollen presenter, veined leaves, glabrous perianth and fruits without horns.

 

Within this section 12 species were assigned to the informal Undulata group by Barker et al. (1999). This group of Hakea species was combined morphologically because they all have simple flat leaves with 3-7 prominent longitudinal veins, 10-40 small flowers (with 3-10.5 mm long pistils) and decurved woody fruits.

Members of the group are H. ambigua, H. anadenia, H. dactyloides, H. elliptica, H. falcata, H. ferruginea, H. hastata, H. laevipes, H. loranthifolia , H. neurophylla, H. plurinervia and H. undulata , from the eastern states and from SW WA. The newly described H. oligoneura (Nuytsia 19: 254 (2009) from the SW coast of WA belongs with this group.

Notes

Very close to, and formerly included under, H. undulata which differs by having smaller flowers (pistil 3–4 mm long vs 4–6 mm long), proportionally longer pedicels (1–1.7 times pistil length vs 0.5–0.8 times) and proportionally broader leaves (length:breadth 2–3.1 vs 3.4–6.7). They also possibly differ in H. anadenia being lignotuberous. In both species the gland is vestigial or absent.

Representative specimens

W.A.: Alexander Morrison Natl Park, 7 km S of junction of Green Head Rd and Tootbardi Rd, B.Barnsley 895 (CANB, PERTH); c. 59 km from Moora towards Jurien Bay, W.E.Blackall 3551 (PERTH); N from Dandaragan, C.A.Gardner 9286 (PERTH); 40–67 mile peg [64–108.3 km] on Geraldton Hwy, E.McCrum 67 (PERTH).

Weblinks

Link to FloraBase treatment of this species for WA.

Further illustrations

I. Holliday, Hakeas. A Field and Garden Guide 18-19 (2005)

J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 12 (2006)

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