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Gastrolobium trilobum Benth.
Bullock Poison

Reference
Lindl., Sketch Veg.Swan R. 13-14 (1839)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Rigid, bushy, spreading shrub, to 1.8 m high. Fl. orange/yellow & red, Jul to Nov. Sandy soils. Open woodland and mallee woodland.

Amanda Spooner, Descriptive Catalogue, 9 October 2003
Image

Scientific Description

Prostrate,spreading or scrambling, shrub, spindly shrub (broom-like). Stems terete, spiny at least in part, hairy; pustules or glands absent. Leaves or phylloclades clearly present, simple, opposite, continuous with stem, 10-35 mm long, glabrous, flat with flat margins; margins lobed; tubercles absent, stalked; pustules or glands absent. Stipules present and persistent to older leaves, 4.5-5 mm long, without glands, ribless. Pedicel present, 1.5-2 mm long, hairy. Bracteoles present but early deciduous. Calyx 5 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 8-9.5 mm long, multicoloured, mostly yellow, red or orange, with some yellow, red or orange spots, streaks or blotches; claws absent; standard 6-7.5 mm long, glabrous, auriculate, wings 9-9.5 mm long, auriculate, keel 9-9.7 mm long, not beaked, 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), 7-8 mm long. Ovary sessile or subsessile, hairy or glandular; style 10 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 July, August, September, October and November. Occurs in the South-West Botanical Province, in the Avon Wheatbelt, Jarrah Forest and Mallee IBRA regions.

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

Distribution

IBRA Regions
Avon Wheatbelt, Jarrah Forest, Mallee.
IBRA Subregions
Katanning, Merredin, Northern Jarrah Forest, Southern Jarrah Forest, Western Mallee.
Local Government Areas (LGAs)
Beverley, Boyup Brook, Brookton, Broomehill-Tambellup, Corrigin, Cuballing, Dowerin, Dumbleyung, Goomalling, Katanning, Kellerberrin, Kojonup, Moora, Mount Marshall, Narrogin, Northam, Pingelly, Quairading, Three Springs, Toodyay, Victoria Plains, Wagin, Wandering, West Arthur, Wongan-Ballidu, Woodanilling, Wyalkatchem, Yilgarn, York.