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Habit and habitat, SW Qld. Photo W.R.Barker

Leaves and inflorescences. Photo W.R.Barker

Leaves and inflorescences. Photo W.R.Barker

Leaves and inflorescence, detail of flowers. Photo W.R.Barker

Leaves, flowers without tepals, and fruit; note the prolonged apiculum on the fruit.  Photo W.R.Barker

Synonymy

Hakea collina C.T.White, Proc. Roy. Soc. Queensland 55: 79 (1944)

T: Dynevor Downs, E of Thargomindah, on sandstone tableland, Warrigo District, Qld, 22 May 1939, S.T.Blake 14088; holo: BRI; iso: K.

Description

Intricately branched often gnarled shrub, 1–2.6 m tall. Branchlets and young leaves appressed-pubescent, with hairs persistent until flowering. Leaves crowded at branchlet ends, terete, 1.5–4.5 cm long, 1.2–1.7 mm wide, straight, grooved on lower side or not.

Inflorescence with 2–12 flowers; involucre 4.5–5 mm long; rachis obscure; pedicels 2.5–5 mm long, tomentose to appressed-pubescent, with hairs white, extending onto perianth. Perianth 2.7–4.5 mm long, white. Pistil 8.5–9 mm long.

Fruit obliquely obovate, 1.4–1.8 cm long, 6.5–8.5 mm wide, finely rugose, glaucous; apiculum 2–4 mm long; horns lacking. Seed 11–13.5 mm long; wing broadly and partly down one side of seed body only.

Distribution and ecology

Occurs in south-western Qld, on lateritic pavement in open Acacia shrubland.

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–July.

Derivation of name

From collinus, Latin for "pertaining to hills", a reference to the type of  location in which the species is  found.

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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 Microcarpa group all share the characteristics of needle leaves, oblique pollen presenter and non-woody, beaked, and sometimes horned, fruits which are not retained for any length of time on the bushes.

Members of the group are H. collina, H. microcarpa, H. recurva and H. standleyensis.

Notes

Not markedly different from H. standleyensis , from which it differs in leaf and perianth length, pubescence type and also flowering time and habitat. The two taxa do not overlap geographically. There would also appear to be differences in the style colour from comparison of the images reproduced here, with H. collina not having the red style of H. standleyensis .

Conservation status

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

Representative specimens

Qld: 45 km E of Adavale, L.Pedley 2497 (BRI); 77.5 km NW of Quilpie, D.E.Boyland 3115 (BRI); 1–2 km N of Mayne R., Tonkoro–Winton road, R.W.Purdie 1587 (BRI); 40 km N of Jundah, G.Trapnell E67 (BRI).

Weblinks

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

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