“…One of the greatest contributions of edible leafy plants or quelites is their content of minerals such as K, Ca, Mg, P, S, Fe, Zn, Mn, Na, B, Mo, Cu and Co, which varies widely among the genera Amaranthus , Anoda , Begonia , Calandrinia , Chenopodium , Crotalaria , Cucurbita , Cyclanthera , Erythrina , Lippia , Phaseolus , Peperomia , Piper , Porophyllum , Portulaca , Suaeda , Tinantia , Tridax and Xanthosoma [ 32 , 40 , 43 , 49 , 53 , 54 , 57 , 58 , 59 ]. In the genera Amaranthus , Begonia , Cyclanthera , Cucurbita (leaves), Phytolacca , Piper , Porophyllum , Solanum and Tinantia , important amounts of vitamins A, B 1 , B 2 , B 3 , B 6 , E and C, as well as niacin, have been determined [ 35 , 39 , 43 , 50 , 55 ].…”