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Mirbelia dilatata R.Br.
Holly-leaved Mirbelia

W.T.Aiton, Hort.Kew. Ed.2,3:21 (1811)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Erect or semi-weeping, prickly shrub, 0.5-3 m high. Fl. pink-violet-purple, Sep to Dec or Jan. Gravelly soils, laterite, sandy soils.

Grazyna Paczkowska, Descriptive Catalogue, 24 July 1996

Scientific Description

Erect, shrub, spindly shrub (broom-like). Stems terete, spiny at least in part, hairy; pustules or glands absent. Leaves or phylloclades clearly present, simple, alternate, continuous with stem, 12-25 mm long, 10-22 mm wide, glabrous, flat with flat margins; margins dentate; tubercles absent; pustules or glands absent. Stipules present but early deciduous ( only visible on youngest leaves ). Pedicel present, 3.5-6.5 mm long, hairy. Bracteoles present and persistent. Calyx 4.5-6 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 12.5-15.5 mm long, multicoloured, mostly pink or purple, with some pink or purple spots, streaks or blotches; claws absent; standard 11-12.5 mm long, glabrous, not auriculate, wings 11-13 mm long, not auriculate, keel 10-12 mm long, not beaked, not auriculate, glabrous. Stamens ten; anthers 0.5-0.7 mm long, at two different levels (filaments alternately long and short); filaments free (or united at the very base), 8-10 mm long. Ovary hairy or glandular; style 11-11.5 mm long, hairy or glandular towards the base, not bearded, terete. Fruit dehiscent (a pod or follicle), stipitate, not constricted between the seeds, round in cross-section, not beaked. Flowers in January, September, October, November and December. Occurs in the South-West Botanical Province, in the Avon Wheatbelt, Jarrah Forest, Mallee, Warren, Esperance and Swan Coastal Plain IBRA regions.

C. Hollister and K.R. Thiele, 24 October 2023


IBRA Regions
Avon Wheatbelt, Esperance Plains, Jarrah Forest, Mallee, Swan Coastal Plain, Warren.
IBRA Subregions
Fitzgerald, Katanning, Northern Jarrah Forest, Perth, Recherche, Southern Jarrah Forest, Warren, Western Mallee.
IMCRA Regions
Leeuwin-Naturaliste, WA South Coast.
Local Government Areas (LGAs)
Albany, Armadale, Augusta Margaret River, Boddington, Brookton, Broomehill-Tambellup, Busselton, Capel, Collie, Corrigin, Cranbrook, Dardanup, Denmark, Donnybrook-Balingup, Dumbleyung, Esperance, Gnowangerup, Harvey, Kalamunda, Kondinin, Kulin, Lake Grace, Manjimup, Mundaring, Murray, Nannup, Narrogin, Northam, Pingelly, Plantagenet, Serpentine-Jarrahdale, Toodyay, Victoria Plains, Wagin, Wandering, Waroona, Woodanilling.