Swainsona species

Polyhydroxyindolizidines are a class of alkaloids, occurring primarily in the family Leguminosae [86]. Within the group the most important members are swainsonine (1,7,8-trihydroxyindolizidine), the toxin of locoweeds Astragalus and Oxytropis species) of North America and the poison peas (Swainsona species) of Austraha, and castanospermine (1,6,7,8-tetrahydroxyindolizidine), the major alkaloid of the Moreton Bay chestnut or Black Bean Castanospermum australe). In contrast to the herbaceous locoweeds and poison peas, the latter is a large tree native of Northeastern Australia, which has been introduced as an ornamental in... 

Colegate, S. M., Dorling, P. R., and Huxtable, P. R. 1991. Swainsonine a Toxic Indolizidine Alkaloid from the Australian Swainsona species. In Toxicology of Plant and Fungal Compounds-Handbook of Natural Toxins, Vol.6, Keeler, R. R, and Tu, A. T, eds. New York, Marcel Dekker. pp. 159-189. 

Certain poisonous plants often cause serious livestock losses. The Australian legume, Swainsona, is known as poison peas, and sheep eating them develop a syndrome called pea struck [46,47]. Livestock is also poisoned by the closely related Astragalus and Oxytropis species, which are found throughout the world, and intoxication of livestock by some species known as locoweeds in the western... 

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