Gastrolobium spathulatum Benth. Poison Bush
Lindl., Sketch Veg.Swan R. 14 (1839)

Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Brief Description
Amanda Spooner, Tuesday 10 February 2004

Erect, bushy shrub, to 1.5 m high. Fl. orange-red, Mar or Aug to Oct. Clay-loam soils, granite. Rock outcrops, ridges.


Beard’s Provinces: South-West Province.

IBRA Regions: Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest, Swan Coastal Plain.

IBRA Subregions: Avon Wheatbelt P1, Avon Wheatbelt P2, Lesueur Sandplain, Northern Jarrah Forest, Perth, Southern Jarrah Forest.

Local Government Areas (LGAs): Armadale, Carnamah, Chittering, Cuballing, Gosnells, Kalamunda, Kellerberrin, Moora, Mundaring, Murray, Northam, Serpentine-Jarrahdale, Swan, Toodyay, Victoria Plains, Wandering, West Arthur, Wickepin.

Scientific Description
C. Hollister and K.R. Thiele, Tuesday 6 October 2020

Erect, shrub, spindly shrub (broom-like). Stems terete, hairy; pustules or glands absent. Leaves or phylloclades clearly present, simple, whorled, continuous with stem, 10-25 mm long, 3-10 mm wide, glabrous, flat with flat margins or flat with incurved margins (conduplicate); margins entire; tubercles absent; pustules or glands absent. Stipules present and persistent to older leaves, 2-5.2 mm long, without glands. Pedicel present, 2-4.2 mm long, hairy. Bracteoles present but early deciduous. Calyx 4.7-6.5 mm long, not accrescent, hairy, with simple hairs; pustules or glands absent. Corolla 7.5-10.5 mm long, multicoloured, mostly red or orange, with some red or orange spots, streaks or blotches; claws present; standard 8-9.5 mm long, glabrous, auriculate, wings 7.2-9 mm long, auriculate, keel 7-9.5 mm long, auriculate, glabrous. Stamens ten; anthers 0.7-1.2 mm long, at two different levels (filaments alternately long and short); filaments free (or united at the very base), 5-9.2 mm long. Ovary stipitate, hairy or glandular; style 7-8.5 mm long, hairy or glandular towards the base, terete. Fruit dehiscent (a pod or follicle), stipitate, not constricted between the seeds, round in cross-section, not beaked. Flowers in March, August, September and October. Occurs in the South-West Botanical Province, in the Geraldton Sandplains, Avon Wheatbelt, Jarrah Forest and Swan Coastal Plain IBRA regions.