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Leaves and inflorescences. Photo  I.Holliday

Leaves and close-up inflorescence; note the semi-circular gland and the reddish styles. Photo  W.R.Barker

Leaves and young fruits. Photo  I.Holliday

Leaves and fruits. Photo  L.Haegi

Leaves and fruits. Photo  W.R.Barker

Synonymy

Hakea cyclocarpa Lindl., Sketch Veg. Swan R. xxxvi (1840)

T: Swan R., Western Australia, 1839, J.Drummond s.n.; syn: BM, CGE, CGE p.p., E, G, K.

Description

Erect open shrub, 1–2.5 m tall, lignotuberous. Branchlets and young leaves appressed-pubescent, with hairs white and ferruginous. Leaves flexible, flat, narrowly obovate, 7–17 cm long, 7–40 mm wide, attenuate, entire, rounded, obtuse or acute.

Inflorescence with 10–18 flowers; involucre 8–8.5 mm long; rachis obscure; pedicels 6–9 mm long, tomentose, with some hairs appressed; hairs white, extending onto perianth. Flowers bisexual. Perianth 7.5–10 mm long. Pistil 13–14 mm long; pollen presenter an oblique disc, 0.9–1.2 mm long; gland U-shaped, 1.5–1.7 mm high.

Fruit sigmoidal, 3.5–4 cm long, 1.8–2.2 cm wide, black-pusticulate. Seed 23–29 mm long; wing narrowly down one side of seed body only.

Distribution and ecology

Occurs in the Perth region and Darling Ra. to as far south as Nannup, Western Australia Uncommon on granite, laterite, loam, gravel or sand in forest and heath.

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 cyclo-, Greek for circular or whorled and -carpa, Greek for -fruit, a reference to the curvature of the fruit.

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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

Florally and vegetatively H. cyclocarpa is very similar to H. pandanicarpa. However, unlike H. pandanicarpa, the flowers of H. cyclocarpa develop within a large involucral bud, the scars of which are visible at the base of the rachis.

Representative specimens

Western Australia: Power Lines SE of Gosnells Quarries, R.J.Cranfield 2275 (PERTH); Nannup, D.McVicar 429 (PERTH); Smiths Mill, Darling Ra., 22 Sept. 1904, A.Morrison s.n. (E); Helena Valley, J.Seabrook 590 (PERTH); Serpentine, Nov. 1905, J.Staer s.n. (E).

Weblinks

Link to FloraBase treatment of this species for WA.

Further illustrations

I. Holliday, Hakeas. A Field and Garden Guide 56-57 (2005)

J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 33 (2006)

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