✵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:Dispelling Wind-Damp Herbs.
Introduction: Dispelling Wind-Damp Herbs: an agent or substance herbs that dispels wind and damp, mainly for relieving rheumatism and related conditions.
✵Till the date Oct 10th,2019, there are totally  kinds of common TCM herbs,  kinds of related plant species, are recorded in this category. These dispelling wind-damp herbs are briefly introduced separately:
Herba Lycopodii(Common Club-moss Herb).
Brief Introduction: The Herb Herba Lycopodii is the dried entire plant of Lycopodium japonicum Thunb.(family Lycopodiaceae), used to dispel wind-damp and relieve contracture in cases of arthralgia with stiffness. The herb is commonly known as Herba Lycopodii, Common Club-moss Herb, Shēn Jīn Cǎo.
✵Official herbal classics defined the herb Herba Lycopodii(Common Club-moss Herb) as the dried entire plant of (1). Lycopodium japonicum Thunb. Other famous herbal classics defined the herb Herba Lycopodii(Common Club-moss Herb) as the dried entire plant of (1). Lycopodium japonicum Thunb., or (2). Lycopodium centro-chinense Ching., or (3). Palhinhaea cernua(L.) Franco et Vasc. They are plants of the Lycopodium L. genus, Lycopodiaceae family, Lycopodiales order. These 2 commonly used species are introduced as:
(1).Lycopodium japonicum Thunb.: It is commonly known as Shí Sōng. Perennial native plant. Stolons terrestrial, slender transverse, 2-3 branches, green, covered with sparse leaves; Lateral branches erect, up to 40 cm, polycyclic binary branched, sparsely, compressed (young branches terete), branched and foliate 5~10 mm in diameter. Leaves spirally arranged, dense, ascending oblique, lanceolate or linear-lanceolate, 4~8 mm long, 0.3~0.6 mm wide, base cuneate, descending, sessile, apex acuminate, with transparent hair, margin entire, herbaceous, midrib inconspicuous.
Sporangium 3 or 4-8 clusters on 30 cm long stalk, bracts spirally sparsely grow on it, thinly grassy, like leaves; Sporangium spikelets unequal, erect, cylindrical, 2~8 cm long, 5~6 mm in diameter, with 1~5 cm long petiole; Spore leaf broadly ovate, 2.5~3.0 mm long, ca. 2 mm wide, apex acute, awnish long, margin membranous, gnarled, papery; Sporangium grows in axillary of spore leaf, slightly exserted, round kidney shape, yellow.
Ecological Environment: The plant is native to lowland acid soil grasslands, broad leaves forests and Masson pine forests. It is distributed in the south of the Yangtze River.
Trait identification: Stolons cylindrical, slender and bent, up to 2 meters long, often fractured, 3~5 mm in diameter, yellow or light brown on the surface, lateral branches dense, about 6 mm in diameter, light brown on the surface. Stolon has many yellow and white adventitious roots below, bifurcate. Leaves dense, linear-lanceolate, often wrinkled and curved, 3~5 mm long, 0.3~0.8 mm wide, yellow-green or gray-green, apex mannish, entire or slightly serrate, veins inconspicuous. Spore heads sometimes visible at branches, erect rod-like, multi fracture, 2~5 cm long, about 5 mm in diameter. Tough, not easy to break, section light yellow, white wood heart. Slight smell, mild taste.
(2).Lycopodium centro-chinense Ching.: It is commonly known as Huá Zhōng Shí Sōng. Similar to lycopodium, but the stem is bifurcated into acute Angle spread, lateral branches are relatively sparse, small branches and leaves dense, leaves with membranous long awn.
(3).Palhinhaea cernua(L.)Franco et Vasc.: It is commonly known as Dēng Lóng Cǎo. Upper much-branched, 30~50 cm long, or folded into short segments, 1~2 mm in diameter, yellow or yellowish-green surface. Leaves dense, linear subulate, 2~3 mm long, yellowish-green or light green, entire, often curved upward, thin, fragile. Spore heads often sporangium, rectangular round or cylindrical, 5~15 mm long, sessile, often pendulous. Slight smell, mild taste. All with yellow and green color, no impurity is better.