Origin
The dry ripe seed of Descurainia sophia (L.) Webb ex Prantl. or Lepidium apetalum Wild. of family Cruciferae.
Location
The Descurainia from Jiangsu, Anhui and Zhejiang provinces is called Nan Ting Li; the Lepidium from Hebei, Liaoning and Inner Mongolia Autonomous Region called Bei Ting Li.
Harvest
Collect plant in summer when seed is ripe.
The actual smell and taste
Nan Ting Li with light smell, slightly pungent and sticky taste, Bei Ting Li without bad smell, slightly bitter and pungent, strong sticky taste.
Processing
Dried in the sun to get seeds, removed impurities; unprocessed or stir-baked.
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