 Photo © I.Holliday |
 Photo © I.Holliday |
Synonymy
Hakea lasianthoides Rye, Nuytsia 5: 27 (1984)
T: Bow R., Western Australia, Nov. 1912, S.W.Jackson s.n.; holo: PERTH; iso: BM p.p., CANB, K n.v., NSW, ?PERTH.
Hakea lasiantha var. angustifolia Benth., Fl. Austral. 5: 502 (1870). T: Western Australia, without date, J.Drummond 21; syn: BM p.p., K, MEL, PERTH? n.v.
Description
Small tree or upright spreading shrub, 1–5 m tall, non-lignotuberous. Branchlets and young leaves appressed-sericeous, ferruginous. Leaves flat, linear to narrowly elliptic or obovate, 3–11.5 cm long, 3–11 mm wide, attenuate, entire, acute.
Inflorescence with 2–8 flowers; involucre 4–5 mm long; pedicels 5.5–10 mm long, woolly-tomentose, with hairs cream, extending onto perianth. Perianth 4.5–7 mm long. Pistil 7.5–8 mm long; pollen presenter 1.1–1.4 mm long; gland 0.2 mm high.
Fruit leaf-like, obliquely transversely elliptic, 2.5–3.1 cm long; 0.7–0.9 cm wide, smooth, not beaked. Seed obliquely narrowly elliptic or obovate, 14.5–20 mm long; wing partly down only one side of seed body or apical only.
Distribution and ecology
Occurs in south-western Western Australia, from just north of Perth to Denmark, in Jarrah forest, often in marshy conditions, in sand, clay or laterite.
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 Sept.–Nov.
Derivation of name
From lasios, Greek for hairy or woolly, and anthos, Greek for flower, and -oides, a resemblance to; i.e resembling H. lasiantha .
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 Trifurcata group all share the characteristics of compound-terete leaves, pubescent pedicel and perianth, lateral pollen presenter and non-woody, non-horned, camouflaged fruits which are not retained for any length of time on the bushes.
Members of the group are H. erinacea, H. lasiantha, H. lasianthoides, H. longiflora and H. trifurcata , all from SW WA. The monophyly or otherwise of the group has still to be tested.
Notes
Very closely related to H. lasiantha but differing from it by the pedicels and perianth with similarly coloured hairs (different colours in H. lasiantha ), the usually narrower leaves, the appressed hairs in the young parts and in distribution and flowering time. .
There are some specimens from Bullsbrook and Collie area which erode the differences between H. lasiantha and H. lasianthoides, particularly by having ferruginous hairs on the pedicel and perianth. These specimens have been referred to as Hakea sp. walyunga in some literature (Young 2006) and in FloraBase as Hakea sp. Walyunga (Penn s.n.)
There is also an undated collection from Geraldton (Lucas, NSW 98150), but this may be a mistaken locality rather than a real record from that area.
Representative specimens
Western Australia: near Augusta, A.M.Ashby 2373 (NSW, PERTH); between Shannon and Northcliffe, J.S.Beard 7783 (NSW); 1 km E of Chittering, G.J.Keighery 13518 (PERTH); Nannup-Busselton, R.D.Royce 2395 (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.A..Young, Hakeas of Western Australia. A Field and Identification Guide 57 (2006)
J.A..Young, Hakeas of Western Australia. A Field and Identification Guide 120 (2006), as Hakea sp. walgunya