Spartium junceum, Spanish broom, is a shrub-like plant, perennial, with long stems. It is a deciduous foliage and the bloom is golden-yellow. The fruits of this plant are black pods when ripe and they burst open spreading seeds .
The whole plant is toxic including flowers. The toxicity of the plant is due to presence of quinolizidine alkaloids such as sparteine, cytisine, anagyrine, rhombifoline  for they known effects on the electrical conductivity of heart muscle and can potentially cause dangerous heart rhythms .
The highest alkaloids content was found in young plants, in reproductive organs, particularly in seeds, and in the twigs with primary structure .
Spartium junceum, poisonous plant
 Tesouro Rodrìguez L, Saiz Rodrìguez, Molina Gutièrrez MA, Rivas Paterna MA, Lòpez R, Bueno Barriocanal M, Spartium junceum (Spanish broom) poisoning, “Anales de Pediatria”, 2014;81(6):e32-3
 Roland Greinwald, Gabriele Lurz, Ludger Witte, Franz-Christian Czygan, A survey of alkaloids in Spartium junceum L. (Genisteae-Fabceae), “Biosciences”, 1990;45(11-12):1085-1089
 Maria Lucia Leporatti, Massimo Imperi, Ethnobotanical notes about some uses of medicinal plants in Alto Tirreno Cosentino area (Calabria, Southern Italy), “Journal of Ethnobiology and Ethnomedicine”, 2007;3:34
 Luciano Barboni, Aurelio Manzi, Bice Bellomaria, Anna M. Quinto, Alkaloid content in four Spartium junceum populations as a defensive strategy against predators, “Phytochemistry”, 1994;37(4):1197-1200