Erect shrub, 0.45-3 m high. Fl. yellow, Aug to Nov. Lateritic soils. Roadsides.
Beard’s Provinces: South-West Province.
IBRA Regions: Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain, Warren.
IBRA Subregions: Avon Wheatbelt P2, Northern Jarrah Forest, Perth, Southern Jarrah Forest, Warren.
Local Government Areas (LGAs): Albany, Augusta Margaret River, Bridgetown-Greenbushes, Broomehill-Tambellup, Bunbury, Capel, Chittering, Gingin, Harvey, Kalamunda, Mundaring, Murray, Plantagenet, Serpentine-Jarrahdale, Swan, York.
Erect, shrub, spindly shrub (broom-like). Stems terete, not spiny, hairy; pustules or glands absent. Leaves or phylloclades clearly present, simple, alternate or whorled, not continuous with stem, 15-30 mm long, 1.2-3 mm wide, hairy, with simple hairs, flat with flat margins; margins entire; tubercles absent; pustules or glands absent. Stipules apparently absent even from the youngest leaves. Pedicel present, 3-3.5 mm long, hairy. Bracteoles present and persistent, 2.5-2.7 mm long, hairy, not striate. Calyx 7-9 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 11-14 mm long, uniformly coloured, yellow; claws absent; standard 12-13.5 mm long, glabrous, not auriculate, not auriculate, keel 10-11.5 mm long, not beaked, not auriculate, glabrous. Stamens anthers 0.8-1 mm long, at two different levels (filaments alternately long and short); filaments united in a closed sheath, 6-10 mm long. Ovary stipitate, hairy or glandular; style 11-12 mm long, hairy or glandular towards the base, not bearded, terete. Fruit dehiscent (a pod or follicle), sessile or subsessile, constricted between the seeds, round in cross-section, not beaked. Flowers in August, September, October and November. Occurs in the South-West Botanical Province, in the Avon Wheatbelt, Jarrah Forest, Warren and Swan Coastal Plain IBRA regions.
General Biology. Growth form. Shrub. Reproduction. Seed. Dispersal. Explosive action, birds, water, ants, machinery, slashing, soil movement, garden refuse. Time to first flowering. 2 years. Toxicity. Seeds are poisonous to humans. Vegetative regeneration strategy. Resprouts from base. Seedbank persistence. Long, 10+ years.
Additional information. Origin. Mediterranean region. History of use/introduction. Garden escape.
Suggested method of management and control. Hand pull or dig out small seedlings ensuring removal of all roots. For mature plants cut and paint with 50% glyphosate or foliar spray with 1% glyphosate, repeat treatment. Alternatively try 250 ml Access® in 15 L of diesel to basal 50 cm of stem (basal bark). Monitor site for recruitment from seedbank. Read the manufacturers' labels and material safety data sheets before using herbicides. For further information consult the Australian Pesticides and Veterinary Medicines Authority to determine the status of permits for your situation or state.
Legend: Y = Yes, regularly, O = Occasionally, U = Uncertain, referred by others but not confirmed.
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Western Australian Herbarium (1998–). FloraBase—the Western Australian Flora. Department of Biodiversity, Conservation and Attractions. https://florabase.dpaw.wa.gov.au/