Identification method
Genuine Bai Wei
Dry rhizomes are cylindrical, slightly curved laterally, nodular, about 1.5 to 5 centimeters in length, 0.5 to 2 centimeters in diameter, and the surface is grayish brown or brown; they are brittle, easy to break, and slightly flat in section. , class white. The root is elongated and cylindrical, sometimes curved or curled, clustered on rhizomes, shaped like a horse's tail, about 10 to 20 centimeters in length, about 1 to 2.5 millimeters in diameter, yellow-brown on the surface, with fine longitudinal wrinkles; crisp, easy Broken, broken powder fly out, the section is slightly flat, white-like light yellow-brown, well-developed leather, xylem is small, only 1/3 of the diameter; smell of gas, taste taste bitter.
Counterfeits and mixables
1. Xiao Baiwei
The dried roots and rhizomes of Tylophora yunnanensis Schltr. are also known as “Spicy Chiliâ€. The rhizomes are recumbent laterally, with slender, cylindrical roots clustered below. The surface is grayish yellow, reddish brown to dark brown. Brittle and easy to fold (CT1-45-5).
Bai Wei
Bai Wei
2, wat vine
It is the dried roots and rhizomes of Tylophora floribunda Miq. The roots are verrucous. The root is slender, cylindrical or whisker-like. The surface is yellowish-white or yellowish, slightly shriveled. Crisp, yellow-white cross section. Gas incense, spicy flavored tongue.
3, with Zhang Mao grass
The dried roots and rhizomes of Cymonia amplexicaule (S. et Z. ) Hemsl. and Cyperus palmarius amplexicaule (S. et Z. ) Hemsl. var. castaneum Maxim. Alias ​​"shouzhangxiao", "soil grass." Rhizome nodules, thick and short, residual stem base, the root slender like a whisker, length 22-26cm, less than 0.8mm in diameter. There are sheep gas, slightly bitter (CT1-45-6, 7).
4, snow peach
The roots and rhizomes of Cynanchum inamoenum (Maxim.) Loes. Alias ​​"Laojun must", "Bamboo Lingxiao", "her mother-in-law sewing kit." Its rhizomes are short and thick, slightly blocky, and rough in appearance, with many stem residues remaining side by side. The fibrous roots of the clumps are horse-tailed, bent into clusters, yellowish-brown on the surface, slightly shriveled. Brittle, yellow-white cross-section, center with fine wood heart. Wei Xin (CT1-45-8, 9)'
5, tide grass
Dry roots of the Romulaceae plant, Cynanchum ascyrifolium (Franch. et Sav. ) Matsum. Alias ​​"Shizhu root." Roots like whiskers, like Bai Wei, but thin and dense.
6. One hundred bamboo shoots
It is the root and rhizome of the Liliaceae plant Poor grass Disporum sessile D. Don var . Jlavens (Kitag) YC Tang. Nodular rhizomes, with disc-shaped stems above or residual stem base and pale yellow to brown scales. The slightly curved cylindrical roots below the clumps grow to 20 cm in diameter and 0.2-0.4 cm in diameter. The surface is yellowish or grayish yellow and has obvious longitudinal wrinkles. Crisp and crisp. The cross-section of the skin is yellow-white, with a light yellow wooden heart in the center. Mild slightly sticky (CT1-45-10, 11).
7, bamboo leaves
It is the rhizome of the lily plant Disporum cantonieme (Lour. ) Merr. Alias ​​"White Dragons", "Japonicus", "Tiger Ginger". The rhizomes were short, with disc-shaped stem marks and stalks on the top, and clusters of slightly curved cylindrical roots below. The surface is grayish yellow, crisp, and has a yellow wooden heart in the middle of the section.
8, rabbit ear wind
The dry roots and roots of the Gerbera piloselloides (L. ) Cass. are aliases of "white eyebrows", "growth grasses", "a stick of incense", and "early ear wind." The rhizomes are short and round, with a hollow depression on the top, surrounded by white cotton wool, and slender fibrous roots below. Surface brown gray. Crisp, yellow-white cross section. Astringent taste (CT1-45-12).
9, group tiger grass
The roots and rhizomes of Cymbidium formosanus Cynanchumforrestii Schlecht are plants of the Romonaceae. The appearance is similar to that of Bai Wei, but the roots are sparse, yellow-white or gray-yellow. Some rhizomes up to 3cm.
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