A perennial sedge, Cyperus rotundus, which has tiny edible nutlike tubers
identify nut-grass in language.
A widely distributed perennial plant of Sedge household (Cyperus rotundus, var. Hydra), which has slender rootstocks bearing tiny, delicious, nutlike tubers, by which the plant multiplies exceedingly, especially in cotton industries.
a widely distributed perennial sedge having small edible nutlike tubers
a widely distributed perennial sedge having tiny delicious nutlike tubers