What is "prosopis juliflora"

Algaroba \Al`ga*ro"ba\, n. [Sp. algarroba, fr. Ar. al-kharr?bah. Cf. Carob.] (Bot.)

1. The Carob, a leguminous tree of the Mediterranean region; also, its edible beans or pods, called St. John's bread.

2. The Honey mesquite ( Prosopis juliflora), a small tree found from California to Buenos Ayres; also, its sweet, pulpy pods. A valuable gum, resembling gum arabic, is collected from the tree in Texas and Mexico.

Prosopis juliflora is a shrub or small tree in the family Fabaceae, a kind of mesquite. It is native to Mexico, South America and the Caribbean. It has become established as an invasive weed in Africa, Asia, Australia and elsewhere.