The seeds are ovoid, trigonous, 0.4-0.8 cm long and 0.3-0.5 cm wide.

The surface is grayish-black (black clown) or yellowish-white (white clown). There is a shallow groove on the dorsal surface and a punctate umbilicus at the end of the ventral ribs. Hard texture, pale yellow or pale yellowish green crumpled and folded cotyledons visible in cross section, slightly oily.

The former cowherd is also known as the large petunia, high seed power, self-sowing ability, but after all, belongs to the annual dicotyledonous taproot plants, can avoid the main plant can be used to kill dicotyledonous plants of herbicides such as 2.4D type of killing, the area is not large can be pulled out before flowering.

Cowherd Seed Efficacy:

Has the effect of clearing heat and generating fluids, used for qi deficiency and yin deficiency, internal heat, coughing and wheezing, phlegm and blood, deficiency heat and tiredness, thirst, dry mouth and throat. Slightly bitter, cool in nature. It is mainly used to benefit the lung yin, clear the deficiency fire, produce fluid and quench thirst. It is used in treating lung deficiency, coughing and wheezing, hemoptysis, heat disease and yin injury, dry throat and thirst. Petunia seeds have diarrhea and laxative, eliminating phlegm and washing away drinks, killing worms and attacking accumulation, used for edema and distension, incontinence, phlegm and drink accumulation.

Air reversal, asthma and cough, worms and abdominal pain, roundworms, tapeworms, but toxic to humans, but not great, a large number of in addition to the direct stimulation of the gastrointestinal cause vomiting, abdominal pain, diarrhea and mucus blood stools, but also may stimulate the kidneys, causing hematuria, the heavy may also damage the nervous system, speech disorders, coma, etc., three-color petunia containing isoergot amide, lysergot amide and nudolysergot alkaloids, hallucinogenic effect.