1, small grain plantain
Character identification: seeds are oval or irregular oval shape fine, length 1 ~ 1.5 mm, less than one millimeter wide, one side slightly raised, one side slightly flat. Surface sepia or dark purple. Extend the microscopic observation to see fine meshes, visible white dots in the slightly convex center (commonly known as open eyes). Hard, slight gas, tasteless, chewing mucus. Full of grain, purple black, no impurities are preferred.
2, large grain plantain
Identification of traits: The shape is slightly the same as that of the small plantago. Only particles are larger, 2 mm long and 1 mm wide. It is better to use large black particles and obvious white pits.
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