niger seeds

from The Collaborative International Dictionary of English v.0.48

Ramtil \Ram"til\ (r[a^]m"t[i^]l), n. [Bengali ram-til.]
   A tropical African asteraceous shrub ({Guizotia abyssinica})
   cultivated for its seeds (called {ramtil seeds} or {niger
   seeds}) which yield a valuable oil used for food and as an
   illuminant.
   [Webster 1913 Suppl.]