Toxicological trivia from August 27, 2014: Prosopis strombulifera is a species of mesquite or algarrobo, a shrub in the legume family. It is known by the English common names Argentine screwbean and creeping screwbean.The plant grows from a network of long, spreading roots and may grow to three meters in height. Many plants may grow together in an area, forming a monotypic stand. The shrub has waxy-textured leaves made up of a pair of leaflets which are each divided into several pairs of secondary leaflets each up to a centimeter long. Whitish spines up to 2 centimeters long appear near the leaf bases. The inflorescence is a spherical head of many very narrow tubelike yellow flowers, the head measuring about 1.5 centimeters wide. The fruit is a bright yellow seed pod coiled tightly into a cylindrical stick up to 5 centimeters long. It contains several greenish seeds each about half a centimeter long.Popular Medicinal Uses: used for toothaches, sore throats, kidney disorders. Spanish common name is: a) Retortuño; b) Prosopia; c) Both names are correct. 

Correct answer: a. Origin of name: Ancient Greek name used by Dioscorides to designate a plant, used later by Linnaeus to name a Prosopis. Read more in WP.