Open, straggling shrub, up to 2.5 m high. Fl. white-cream/yellow, Aug to Oct. Red clay or sand over laterite. Seasonally wet flats.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Esperance Plains, Jarrah Forest, Mallee, Swan Coastal Plain.
IBRA Subregions: Avon Wheatbelt P2, Fitzgerald, Northern Jarrah Forest, Perth, Southern Jarrah Forest, Western Mallee.
IMCRA Regions: Central West Coast, WA South Coast.
Local Government Areas (LGAs): Albany, Augusta-Margaret River, Boddington, Busselton, Gnowangerup, Katanning, Murray, Plantagenet, Wandering.
Habit and leaf form. Shrubs, 2–5 m high. Leaves alternate, leaves (10–)20–50(–70) mm long overall. Leaf blade (10–)20–50(–70) mm long, 1 mm wide, undissected, linear, terete; margins entire; indumentum absent.
Inflorescence and floral features. Inflorescence axillary, racemose. Flowers pedicellate, cream. Pedicel 3–9 mm long. Perianth (perigone) 1.5–2.5 mm long. Pistil 3–4.5 mm long. Pollen presenter conical.
Fruit and seed features. Fruit 16–23 mm long, 8–10 mm wide; corky tetrahedral projections absent; red-brown and pale wood zones absent. Seed 14–17 mm long; wing discontinuous, marginal, extending down one lateral side only.
Distribution. Western Australia. IBRA Bioregions SW: SWA, AW, JF, and ESP.
Habitat. Amongst low (sclerophyll) shrubland (heathland); in gravelly soil, or sand.
Flowering Time. August to October.
Etymology. Oldfieldii: honouring Augustus Frederick Oldfield (1820–1887), English botanist and zoologist, who collected in the SW and in the Murchison district of Western Australia in the 1850s and 1860s, and earlier in Tasmania.
Conservation Status. P3: Priority Three - Poorly Known Taxa.
Descriptions were generated using DELTA format and DELTA software: Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993 onwards, 1995 onwards, 1998)
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