Neglected food resources

Name(s): 
Limited utilization of foodstuffs
Forgotten food products
Ignorance of traditional agricultural products
Nature 
Only 1,100 of the earth's 265,000 species of plants have been thoroughly studied by Western scientists, but as many as 40,000 may have medicinal or undiscovered nutritional value for humans.
Incidence 
In pre-Colombian times protein-rich amaranth and guinea were basic foods in the New World along with maize and beans, but nowadays they are seen as weeds.
Type 
(F) Fuzzy exceptional problems