mongolia montenegro montserrat morocco mozambique myanmar namibia nauru nepal netherlands new caledonia new zealand nicaragua niger nigeria north korea norway oman pakistan palau palestinian national authority panama papua new guinea paraguay peru philippines poland portugal puerto rico qatar republic of...
, trailing herb of the bindweed family. the plant, which is native to tropical america, is cultivated on sandy or loamy soils throughout many warm regions of the world, and exists as an important food staple in a number of countries. it is planted primarily for its thick, edible roots, called sweet potatoes...