U.S. The Earth Almond (Cyperus esculentus) a plant producing small tubers about the size of a bean. (In F. souchet comestible or amande de terre.)
1860. Bartlett, Dict. Amer., Earth Almond.… A perennial, indigenous to southern Europe, growing in the form of a rush, some three feet high, producing small tubers the size of a common bean, and called by the Valencians ‘Chufas.’
1879. Louisville (U.S.) Home & Farm, 15 April. My hogs had no corn. They had abundance of chufas with the run of potato pinder and pea fields.
