Character identification:
1, flowers. It is an open bud or flower. Often 3 to 7 clusters are born on a short pedestal, or with a single flower and leaves shed. Corolla cylindrical or rod-shaped, 1-1.5 cm long, gray-purple or gray-green, densely pubescent, line ends split into four, lobes oval, flexible. Gas slightly, taste slightly pungent. Smell smelling and pungent burning sensation are exasperating headaches.
2, astragalus flowers. The shape is slightly similar to that of amaranth, which is 3 to 8 mm long and 1 to 1.5 mm in diameter. The upper end is slightly shorter and the lower end is thinner. Grayish green or grayish yellow, densely pubescent. More than a single flower. Often with twigs. Gas slightly fragrant, slightly spicy.
Silk flowers are more complete with flowers, grayish purple or lilac without impurities.
Astragalus flowers with fine flowers, light yellow or gray yellow without impurities are preferred.
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