Arachis pintoi (Pinto Peanut)

Native to central and eastern Brazil, this low-growing perennial herb spreads through creeping stems that root at their nodes. Its yellow flowers develop pegs that push into the soil, where pods usually containing one seed form underground. Root nodules house nitrogen-fixing bacteria. It is grown as a groundcover, erosion-control plant, and nutritious forage that tolerates grazing. It is naturalized in Colombia and Hawaii, United States. The University of Florida classifies it as a high invasion risk throughout Florida. Photographed in the department of Quindio, Colombia.