✵The TCM herbalism is also known as pharmaceutics of Traditional Chinese Medicine, or Chinese pharmaceutics, is the branch of health science dealing with the preparation, dispensing, and proper utilization of Chinese herbs. It is majorly composed of Introduction of Chinese Medicinals, Classification of Chinese Herbs, Formulas, and Patent medicines.
Classifications of Herbs:Herbs Clearing Heat and Purging Fire.
Introduction: Herbs Clearing Heat and Purging Fire: an agent or substance that has the effect of clearing heat from the Qi system, with high fever, dire thirst, dry yellow tongue coating and rapid surging pulse, or purging fire from the internal viscera, such as heart fire, liver fire, etc.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species,  kind of related minerals, are recorded in this category. These Herbs Clearing Heat and Purging Fire are briefly introduced separately:
Herba Equiseti(Common Scouring Rush Herb).
Brief Introduction: The herb Herba Equiseti is the dried aerial part of Equisetum hiemale L.(family Equisetaceae), used in ophthalmology for treating acute infections and removing nebula. The herb is commonly known as Herba Equiseti, Common Scouring Rush Herb, Mù Zéi.
✵The herb Herba Equiseti(Common Scouring Rush Herb) is the dried aerial part of Equisetum hiemale L., it is a plant of the Equisetum. Genus, the Equisetaceae family of the Equisetales order. It is also known as common scouring rush herb, herb of common scouring rush, herb of dutch rushes, herb of rough horsetail, herb of scouring rush or Mù Zéi.
Common official herbal classics and Other famous herbal classics defined the herb Herba Equiseti(Common Scouring Rush Herb) as the dried aerial part of (1). Equisetum hiemale L. This commonly used species is introduced as:
(1).Equisetum hiemale L.: Equisetum, perennial herb, height is above 50 cm. Rhizome short, black, prostrate, nodes growing dense whorled black - brown roots. Stems fascicular, rigid, erect, unbranched, cylindrical, 4~8 mm in diameter, related to knotty nodes, internodes hollow, stem surface with 20~30 longitudinal ribs, each row with two rows of verticular projections. Leaves degenerate into scales, base united into a tubular sheath, sheath 6~10 mm long, base with a dark brown ring, upper part pale gray, apex with many brown serrate lobes, lobes lanceolate conical, apex long, acute, back with a shallow groove in the middle, lobes early, only on stem apex and young stem not shed. Sporangium panicle born at stem apex, oblong, 1~1.5 cm long, apex with small dark brown tip, composed of many rotary-arranged hexagonal shield sporophyll, along the edge of sporophyll several cysts, sporangium large. Spores are numerous, homogenous, spherical, with 2 filamentous slugs, crisscross-shaped, coiled on spores, which bounce off in the water for reproduction. The sporangium is produced between June and August.
Ecological environment: The plant grows in damp places under forests on hillsides, river banks and streams, sometimes it also grows in weedy fields. Resource distribution: The plant distributes in the north, northwest, central, southwest areas of China.
Trait identification: stem long tubular, straight, 20~60 cm long, 2~6 mm in diameter, nodes conspicuous, internodes 2.5~9 cm long, unbranched. Surface gray-green or yellow-green, with 20~30 longitudinal edge, the edge has most of the small bright warty process, rough feeling. Nodes have sheathed leaves. Sheath tube base and sheath teeth brownish-black, middle pale yellow. The body is light, brittle, easy to break, the section is hollow, most round small cavity around. Smell light, sweet, slightly astringent, chewing the sand sensation.