Erect to spreading, non-lignotuberous shrub, 1-5 m high. Fl. white, Aug to Oct. Sandy or gravelly loam, sandy clay, laterite, granite. Wet depressions, flats, swampy areas.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Esperance Plains, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain.
IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Dandaragan Plateau, Eastern Mallee, Fitzgerald, Lesueur Sandplain, Northern Jarrah Forest, Perth, Recherche, Southern Jarrah Forest, Western Mallee.
IMCRA Regions: WA South Coast.
Local Government Areas (LGAs): Albany, Armadale, Beverley, Broomehill-Tambellup, Busselton, Capel, Carnamah, Chittering, Collie, Cranbrook, Dandaragan, Esperance, Gnowangerup, Greater Geraldton, Harvey, Irwin, Jerramungup, Katanning, Kent, Kojonup, Lake Grace, Moora, Narembeen, Plantagenet, Ravensthorpe, Serpentine-Jarrahdale, Toodyay, Victoria Plains, Wandering, Waroona, West Arthur, Westonia, York.
Habit and leaf form. Shrubs, 1–3 m high. Leaves alternate, leaves 12–45(–48) mm long overall. Leaf blade 12–45(–48) mm long, 3–8 mm wide, undissected, elliptic, flat; margins entire; indumentum absent.
Inflorescence and floral features. Inflorescence axillary, racemose. Flowers pedicellate, white and cream. Pedicel 2–3 mm long. Perianth (perigone) 3–4 mm long. Pistil 5–6 mm long. Pollen presenter conical.
Fruit and seed features. Fruit 12–20 mm long, 5–9 mm wide; corky tetrahedral projections absent; red-brown and pale wood zones absent. Seed 9.5–13 mm long; wing discontinuous, marginal, extending ± unequally down each lateral side.
Distribution. Western Australia. IBRA Bioregions SW: GS, SWA, JF, MAL, and ESP.
Habitat. Amongst tall (sclerophyll) shrubland, or low (sclerophyll) shrubland (heathland); in gravelly soil, or sand, or clay; occupying water courses and swamps.
Flowering Time. May to October.
Etymology. Marginata (L.): marginatus – furnished with a border; referring to the thickened margins of the leaves of this species.
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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