poison bush(n = noun.plant) gastrolobium, poison pea - any of various Australian evergreen shrubs of the genus Gastrolobium having whorled compound leaves poisonous to livestock and showy yellow to deep reddish-orange flowers followed by two-seeded pods;
Any fabaceous shrub of the genus Gastrolobium, the herbage of which is poisonous to stock; also, any species of several related genera, as Oxylobium, Gompholobium, etc. [Webster 1913 Suppl.]