1. The root of Angelica dahurica is conical, 10-20cm long and 2-5cm in diameter.

2. The stop is nearly square or almost square, the surface is grey-brown, with many lenticel-like transverse protrusions, 0.5-1cm long, slightly arranged in four longitudinal rows, and there are depressed stem marks at the top.

3. The quality is relatively heavy, the cross-section is white and powdery, the skin is densely covered with brown oil spots, the cambium ring is brown and nearly square.

4. The smell is aromatic, the taste is pungent and slightly bitter.

5. The root of Qi Baizhi is conical, 7-24cm long and 5-2cm in diameter.

6. The surface is gray-yellow or yellow-brown, relatively smooth, and the skin also has scattered transverse protrusions and root marks.

7. Hard in texture, off-white in cross-section, powdery, with brown oil spots scattered on the skin, and cambium ring-shaped and brown.

8. Those with independent branches, thick strips, hard texture, heavy weight, sufficient powdery nature and strong aroma are preferred.

9. Angelica dahurica: thicker than Angelica dahurica, but the four edges are not as obvious as those of Angelica dahurica. The surface is yellowish-white or light brown. The wrinkles are more obvious, and the square cross-section is not as obvious as that of Angelica dahurica, often in a ring-like shape. .

10. "Pimples" are thicker.

11. Rich aroma.

12. In the past, Angelica dahurica produced in Suining, Sichuan was the best, followed by Tongliang, and other producing areas.

13. Yu Baizhi (Hui Baizhi): shaped like a carrot, round and slender, with a diameter smaller than the first two types. The surface is smoother, with fewer transverse lenticels (tiny pores) and not as good as the first two types. Obviously, the body is light, the powder is insufficient, and the aroma is weak.

14. Observe the cross section of Angelica dahurica under the microscope.

15. The cork layer of Angelica dahurica dahuricae has more than 10 columns of cork cells.

16. There are oil tubes distributed in the cortex.

17. The phloem is broad, the sieve tube groups are arranged slightly radially, and there are many oil tubes.

18. The cambium is slightly square.

19. The xylem accounts for 1/2 of the root, and the vessels are sparsely arranged.

20. The thin-walled and thin breasts of this product contain starch granules, and some contain calcium oxalate cluster crystals.

21. The cambium of Qi Angelica is in the shape of a ring; the xylem accounts for 1/3 of the root, and the vessels are arranged in a radial pattern.