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Cang Er Zi is the fruit of the annual herb Cang Er of the Asteraceae family, harvested in the fall and dried, fried to remove the hard spines used. Its nature is warm, taste pungent, bitter, belonging to the lung meridian, mild and sparing, taste pungent dispersal of wind, bitter dry dampness, through the orifices to relieve pain, applicable to rhinitis, sinusitis, wind-cold headache, do not smell the aroma and odor, flow of turbid mucus, etc..

The seeds have a certain degree of toxicity, crushed and fried dry, soaked in sesame oil heating, external toxicity is greatly reduced. Fragrant oil contains vitamin E, sesamol, sesamolin and other substances, antioxidant capacity is very strong, so it is easier to store than other vegetable oils.

Expanded information:

The dried mature fruit with involucre of C. aurantium is fusiform or ellipsoid, 1 to 1.7 centimeters long, 0.4 to 0.7 centimeters in diameter, yellowish-green, brownish-green, or dark brown in color, with glochidia all over, and 2 thicker spines at the tip, separated or connected, and with a fruiting peduncle scar at the base.

The outer skin (involucre) is hard and tough, with a longitudinal septum in the center of the transverse section divided into two chambers, each of which harbors one achene. Achenes slightly fusiform, one side flatter, pericarp gray-black, papery, one end with 1 protruding stylopodium; seeds light gray, testa membranous, within the cotyledons 2 pieces, the root of the embryo is at the tip; oily, smell of the gas faint, mouth taste slightly bitter.

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