 Leaf showing shape and venation. Photo © K.Shepherd |
 Young foliage. Photo © W.R.Barker |
 Leaves and very young fruits in inflorescences. Photo © W.R.Barker |
 Leaves and flowers. Fruit is normally down-turned. Photo © Ivan Holliday. |
 Opening fruits. Photo © W.R.Barker |
 Hooker's Icones Plantarum t. 447 (1842). |
Synonymy
Hakea undulata R.Br., Trans. Linn. Soc. London 10: 185 (1810)
T: Observatory Hill, King George Sound, [W.A.], s.d. [Dec. 1801], R.Brown Iter Austral. 3349; syn: BM, E, K.
Anadenia hakeoides Lindl., Sketch Veg. Swan R. xxxi (1839). T: Swan River, [W.A.], s.d. (received in 1839 or before), J.Drummond s.n.; syn: BM, G, K; Swan River, [W.A.], s.d. (received July 1839), J.Drummond 613; ?syn: BM, G.
Hakea undulata ß subintegerrima Meisn., in J.G.C.Lehmann, Pl. Preiss. 1: 566 (1845). T: in regionib. interior Australiae meridionali-occid. [W.A.], Oct. 1840, Preiss 569; holo: NY; iso: LD, LEP. An image of the NY type specimen can be seen on the New York Botanical Garden site.
Description
Erect shrub, 1–2 m tall, non-sprouting. Branchlets glabrescent by flowering. Leaves obovate to elliptic, shallowly concave, undulate towards margins, 4–11.5 cm long, 20–65 mm wide, narrowly attenuate at base, spinulose-dentate, acuminate to rounded, slightly greyish green; longitudinal veins 3–7, prominent above and below; secondary venation reticulate, prominent.
Inflorescence solitary with 12–21 flowers; pedicels glabrous. Perianth cream-white. Pistil 3–4 mm long; gland vestigial.
Fruit obliquely ovate, 2.3–3 cm long, 1–1.4 cm wide, not curved at apex, beaked. Seed ±elliptic, 15–18 mm long; wing extending fully or partly down one side of body only, notched near base, blackish brown.
Distribution and ecology
Occurs in south-western W.A. from Moore R. north of Perth, to just east of Albany. Found in Eucalyptus (often E. wandoo) open forest and woodland, in sandy to gravelly clay soil over laterite or sometimes in association with granite outcrops.
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 undulatus, Latin for undulate or wavy, a reference to the undulations in the leaves of this species.
Relationships
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 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 H. anadenia (q.v.). Within the Undulata Group, H. undulata is the only species in which more than 3 fruits per axil have been observed, but this condition occurs in fewer than 20 percent of specimens seen.
Conservation status
This species was treated as 'Poorly Known' in J.D.Briggs & J.H.Leigh, Rare or Threatened Australian Plants (1995).
Representative specimens
W.A.: Pages Way, Gosnells, R.J.Cranfield 525 (AD, PERTH); Karragullen, J.D'Alonzo 30 (CANB, K, PERTH); Greenmount, 25 Aug. 1897, R.Helms s.n. (MEL, PERTH); 4.5 km N of Ellen Peak, K.Newbey 304 (PERTH); Mt Manypeaks, S.P.Pfeiffer 25 (PERTH).
Weblinks
Link to FloraBase treatment of this species for WA.
More photographs of this species can be seen on the Australian National Botanic Gardens site.
Further illustrations
J.Young, Hakeas of W. Australia, Botanical District of Avon 23, 108 (1997)
I. Holliday, Hakeas. A Field and Garden Guide 210-11 (2005)
J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 115 (2006)
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