Ganoderma lucidum powder is light brown, brown to purple brown. The hyphae are scattered or bound together, colorless or light brown, slender, slightly curved and branched. The diameter is 2.5 ~ 6.5 microns. The spores are brown, oval, flat at the top, colorless on the outer wall and warty on the inner wall, with a length of 8 ~ 12 micron.

(2) Test identification

Take 2 grams of Ganoderma lucidum sample powder, add 30 ml of ethanol, heat and reflux for 30 minutes, filter, evaporate the filtrate, and dissolve the residue with 2 ml of methanol as the test solution. In addition, 2 grams of Ganoderma lucidum reference medicinal materials were taken and made into reference medicinal material solution by the same method. Thin-layer chromatography test was used. Four microliters of the above two solutions were respectively applied to the same silica gel G thin-layer plate, and the upper solution of petroleum ether (60 ~ 90℃)- ethyl formate-formic acid (15∶5∶ 1) was used as the developing agent, which was developed, taken out, dried and tested under an ultraviolet lamp (365 nm). In the chromatogram of the test sample, fluorescent spots with the same color appear at the positions corresponding to the chromatogram of the control medicinal materials.