poison bush

(noun) 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. Synonyms: poison bush, poison pea, gastrolobium.

(noun) either of two Australian plants of the genus Swainsona that are poisonous to sheep. Synonyms: darling pea, poison bush.