✵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:Expectorants,Herbs for Resolving Heat-Phlegm.
Introduction: Expectorants,herbs for resolving heat-phlegm: an agent or substance herbs warm in property, used in treating disorders of heat-phlegm or phlegm-dampness.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, kind of mineral, are recorded in this category. These expectorants, herbs for resolving heat-phlegm are briefly introduced separately:
Radix Peucedani(Hogfennel Root).
Brief Introduction: The herb Radix Peucedani is the dried root of Peucedanum praeruptorum Dunn, or Peucedanum decursivum Maxim.(family Umbelliferae), used to check the adverse up-flow of Qi, and resolve phlegm for relieving cough and dyspnea with copious or yellow sticky expectoration.
✵The herb Radix Peucedani(Hogfennel Root) is the dried root of Peucedanum praeruptorum Dunn, or Peucedanum decursivum Maxim., they are plants of the Peucedanum L. genus, the Umbelliferae family of the Umbelliflorae order. It is also known as Root of Whiteflower Hogfennel, Root of Common Hogfennel, or Qián Hú.
Common official herbal classics and other famous herbal classics defined the herb Radix Peucedani(Hogfennel Root) as the dried root of:(1). Peucedanum praeruptorum Dunn., (2). Peucedanum decursivum Maxim. These 2 commonly used species are introduced as:
(1).Peucedanum praeruptorum Dunn.: It is also known as whiteflower hogfennel. Perennial herbs, 60~100 cm tall. Roots are conical, with a few lateral roots, surface is yellowish-brown to brownish-black, root tip residual most brown leaf sheath fibers. Stem is erect, cylindrical, upper branched, pubescent, lower glabrous. Basal leaves sessile, base enlarged into the sheath, clasping; Leaf blade broadly triangular-ovate, trifoliate or 2-3-gyrus pinnately divided, 15~20 cm long, 12 cm wide, first primary feather 2~3 pairs, bottom 1 pair with a long stalk, stalk 3.5~6 cm long, others with short or sessile. Final lobes rhomboid obovate, apex acuminate, base cuneate to truncate, margin irregularly 3-4 coarsely or roundly serrate, sometimes lower serrated lobed or deeply lobed, lower surface veins conspicuously protuberant, both surfaces are glabrous, or sometimes lower surface veins with sparse short hairs on top and margin. Cauline and basal leaves similar, smaller; Upper leaf sessile, leaf blade trifurcate, lobes narrow, base cuneate, middle one base decurrent. Inflorescences terminal or lateral, 6~18 corymboses, unequal, 1.5~4.5 cm long, pilose; Involucral bracts 1 to several, glabrous, linear-lanceolate, 0.7~1 cm long, margin membranous, pilose; 15~20 inflorescences, pedicels unequal, pilose; 7~12 involucral bracts, ovate-lanceolate, apex long acuminate, 3~5 mm long, 0.6~1 mm wide, equal to or longer than pedicels, pilose; Calyx teeth not conspicuous; 5 petals, white, broadly ovate to suborbicular; 5 stamens; Style is short, curved, stylopodium conical. Fruit ovoid, dorsal compressed, about 4 mm long, about 3 mm wide, brown, sparsely short-hairy, dorsal edges slightly protruding, lateral edges shaped like wings, narrower than the fruit body, slightly thicker, inside the ridge 3-5 tubing, connate surface 6-10 tubing, endosperm ventral straight. It is flowering from July to September, fruiting from October to November.
Ecological environment: the plant grows on hillsides with forest margins, roadsides or in the grass on hillsides where the unit is negative. It is distributed in the middle and lower reaches area of the Yangtze River, the Zhujiang river area, the south middle reaches area of the Yellow River, northwest and southwest, and other areas of China.
(2).Peucedanum decursivum Maxim.: It is also known as Purpleflower Hogfennel. Perennial herbs, 1~2 meters high. Roots conical, constant branched roots, surfaces tawny to tan. Stem erect, cylindrical, with shallow longitudinal grooves, smooth, purple, upper branches pilose. Rhizome leaves and cauline leaves have long stalks, stalk 13~36 cm long, base swollen into a round purple sheath, clasping outside, face glabrous; Leaf blade triangular to oval, hard paper, 10~25 cm long, primary trifid or slice has a basal junction with the tip leaf, extending along the leaf axis in a pterygoid shape, lateral lobes have a basal junction with the tip leaf, extending along the leaf axis in a pterygoid shape, lateral lobes have a basal junction with the tip blade in a pterygoid shape, extending along the leaf axis in a pterygoid shape, wing margin serrate. Ultimate lobes ovate or oblong-lanceolate, 5~15 cm long, 2~5 cm wide, apex acute, margin white cartilaginous serrate, apex pointed, upper dark green, veins pubescent on veins, lower green-white, main veins often purplish, glabrous; The upper leaves of the stem are simplified into a saclike swollen purple sheath. Compound umbel terminal and lateral, peduncle 3~8 cm long, pilose; 10~22 umbrella spokes, 2~4 cm long; 1~3 involucral bracts, ovoid, broadly sheathed, persistent, reflexed, purple; 3~8 involucral bracts, linear to lanceolate, glabrous; Umbrella spokes and flower handles hairy; Flowers deep purple; Calyx teeth distinct, linear or triangular; Petals obovate or ellipsoid lanceolate, apex usually not indented into concave head; Anthers dark purple. Round fruit oblong to ovoid, 4~7 mm long, 3~5 mm wide, glabrous, dorsal ridge uplift, sharp, chamfered edge have a thicker narrow wings, and the wide nearly edge slot in the tubing 1-3, hopson surface have tubing 4~7 mm, 3~5 mm wide, glabrous, dorsal ridge shape uplift, sharp, chamfered edge have a thicker narrow wings, and the wide nearly edge slot in the tubing 1-3, hopson surface has 4~6 tubings, endosperm venter has 4~6 tubings, endosperm in front indentations. Its flowering period is from August to September, fruiting from September to November.
Ecological environment: the plant grows in the edge of hillside forest, gully side or miscellaneous wood forest thicket. It is distributed in the middle and lower reaches area of the Yangtze River, the Zhujiang river area, the Hanjiang river area, north area, Taiwan, and other area of China.
Trait identification: roots subcylindrical, conical or spindle-shaped, slightly twisted, lower branched, 3~15 cm long, 1~2 cm in diameter. Stem marks and fibrous leaf sheath remnants were often found in the root head. The surface is grayish brown to dark brown, with irregular longitudinal furrows and longitudinal wrinkles, and transverse lenticels; There are dense rings on the upper part. Soft, dry hard, can be broken, the broken surface is not neat, loose, in the magnifying glass can be mailed many small yellow-brown oil points scattered; Skin thick, yellowish-white, cambium ring obvious, wood light yellow. Smells fragrant, taste slightly bitter, pungent. The herb with thick, soft quality, the strong fragrance is the better.
Trait identification: the head of the rhizome of anhydrous is relatively short, and there is little fibrous leaf sheath residue in the root. The broken dough is easy to be separated from the wood. Smells are fragrant, taste slightly bitter, pungent.