Synonymy
Hakea ivoryi F.M.Bailey, Queensland Fl. 1346, t. 59 (1901)
T: Bingara, Qld, 1896, J.F.Bailey s.n.; syn: BRI 11492; Charlotte Plains, Qld, 1901, W.A.L.Ivory s.n.; syn: BRI11491.
Description
Shrub or usually a small tree 2–12 m high, lignotuberous, resprouting from base. Branchlets white appressed-pubescent, at length glabrescent. Leaves terete, simple and (1.5–) 3–13 cm long, or compound with 2–4 (–8) segments 0.3–7 cm long and (–0.5) 0.6–1.2 (–1.4) mm diam., appressed-pubescent, quickly glabrescent.
Inflorescence axillary with 20–50 flowers, white ±appressed-pubescent on rachis, pedicels and perianth, rarely with simple erect gland-tipped hairs especially on perianth; rachis 25–60 mm long; pedicels 3.5–5.5 mm long. Perianth recurved in mature bud, (4–) 4.5 mm long, cream-white. Pistil 20–24 mm long; style straight or curved; pollen presenter oblique.
Fruit 33–35 mm long, with long obscure beak, glabrous or with dense simple erect glandular hairs when young; apiculum 0.8–1.5 mm long; horns obscure, to 1 mm long; valves obovate-oblong, 11–14 mm wide; red-brown wood zone 1 mm wide; pale wood zone 2.5–5 mm wide. Seed occupying most of valve; wing terminal or decurrent to 1/3 way down one side of seed body only.
Distribution and ecology
Confined to south-western Qld and north-western N.S.W., in open arid woodland in sand or loam.
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 Oct.–Jan., with one May record.
Derivation of name
Named after the collector of one of the syntypes of this species, William Alexander Laurie Ivory who sent material to Bailey.
Relationships
Part of the group referred to as the Corkwoods (Grevilleoides p.p. of Bentham, Lorea group of Barker et al. 1999) because the bark of these plants is usually corky. Pollen presenters are usually not conical (except in H. ednieana ), leaf venation is obscure, inflorescences are long and floriferous and mostly pendent and many fruits are formed. These fruits are not particularly woody, are usually obscurely horned, not usually retained for a long time on the plant and the seed occupies most of the valve face.
Members of this group include H. chordophylla, H. divaricata, H. ednieana, H. eyreana, H. fraseri, H. ivoryi, H. lorea, H. macrocarpa and H. pulvinifera . They tend to occur in drier areas of Australia.
Notes
A small tree far to the north-west of the range (211 km WNW of Mt Doreen, N.T., G.Chippendale 3361, BRI, DNA, NSW) with the short simple, rarely few-segmented slender leaves and persistent appressed-pubescent branchlets of H. ivoryi needs further study.
Young or 'juvenile' trees are noted as having often highly divided leaves.
Representative specimens
Qld: c. 13 km by road N of Yowah Opal Field store, W.R.Barker 4871 & R.Chinnock (AD); c. 15 km NW of Charleville, L.S.Smith 838 & S.L.Everist (BRI, CANB, MEL, NY). N.S.W.: Wanaaring, Paroo R., R.J.Dalton s.n. (AD, BM, MEL, NSW)
Weblinks
Link to PlantNET treatment for NSW.
A photograph of this species can be seen on the Australian National Botanic Gardens site.
Link to Maiden’s Forest Flora of New South Wales vol. 6, pl. 190 for an account of H. ivoryi and Margaret Flockton's illustration of this species.
Further illustrations
J.H.Maiden, Forest Fl. New South Wales 6: no. 185, pl. 190 (1913);
G.M.Cunningham et al., Pl. W. New South Wales 217 (1981).