✵The article records the herb Tartarian Aster Root, including its English name, Latin name, Pinyin name, properties and flavor, and botanical source—the single plant species Aster tataricus L.f.—along with a detailed introduction to the botanical features, growth characteristics, and ecological environment of this plant species; the macroscopic and microscopic features of the herb Tartarian Aster Root; its pharmacological actions, medicinal efficacy, and administration guidelines.
Radix Asteris (Tartarian Aster Root)
Pinyin Name: Zǐ Wǎn
English Name: Tartarian Aster Root
Latin Name:Radix Asteris Properties and Flavor: Warm, bitter
Brief Introduction:Radix Asteris is the dried root and rhizome of Aster tataricus L.f., used as an expectorant and antitussive for coughs with profuse phlegm and for consumptive (phthisical) cough. It is commonly known as Radix Asteris, Tartarian Aster Root, or Zǐ Wǎn.
Botanical Source:Radix Asteris (Tartarian Aster Root) is the dried root and rhizome of Aster tataricus L.f., a plant belonging to the genus Aster L., family Asteraceae (formerly Compositae, daisy family), order Asterales.
Classical herbal works define Radix Asteris (Tartarian Aster Root) as the dried root and rhizome of Aster tataricus L.f. This commonly used species is described below:
(1) Aster tataricus L.f.
Botanical Description: Also known as Qīng Niú Shé Tóu Huā, Aster tataricus L.f. is a perennial herb reaching 40–150 cm in height. Stems are erect, often unbranched, stout, and sparsely hispid. The rhizome is short and densely covered with numerous fibrous roots. Basal leaves are withered at anthesis (flowering stage), deciduous, oblong-spatulate or ellipsoid-spatulate, 20–50 cm long and 3–13 cm wide, with a decurrent base. Cauline leaves are alternate and sessile; leaf blades are oblong-ovate or lanceolate, 18–35 cm long and 5–10 cm wide; the midrib is stout, with 6–10 pairs of pinnate lateral veins.
Numerous capitula (flower heads), 2.5–4.5 cm in diameter, are arranged in a corymb. Involucral bracts are semiglobose, 10–25 mm wide, arranged in three series: the outer series are gradually shorter, grassy in the lower or upper portion, with acute or rounded apices and broadly membranous, purplish-red margins. The marginal florets are ligulate, ca. 20 in number, female, blue-purple, with 3-dentate ligule apices; styles are bifurcated. The central florets are tubular, hermaphroditic, yellow, with 5-dentate apices. There are five stamens; the stigma is bifurcated.
Achenes are obovate-oblong, flattened, purple-brown, 2.5–3 mm long, with one or—at least—three longitudinal veins on each side; the upper portion is covered with short, appressed hairs; the pappus is dirty white or reddish. Flowering occurs from July to September; fruiting from September to October.
Ecological Environment: The plant grows on shady slopes and in marshes of low hills, on hilltops, and in low-lying grasslands and marshes.
Growth Characteristics: The plant prefers a warm, humid climate; it is cold-tolerant and waterlogged-tolerant but drought-sensitive. Roots survive winter safely at temperatures as low as −20 °C (−4 °F). Cultivation requires deep, loose, fertile, humus-rich sandy loam soil with good drainage. Avoid clayey or saline soils, and avoid continuous cropping.
Characteristics of the Herb: The rhizome is irregularly block-shaped, 2–5 cm long and 1–3 cm in diameter; the surface is violet-red or pinkish-gray, varying in size. Residues of stem bases and petiole scars occur at the apex; numerous fine roots are clustered in the middle and lower portions. The texture is hard and firm; the fracture surface is flat and oily. Numerous roots are thin and elongated, 6–15 cm long and 1–3 mm in diameter, often braided; the surface is purplish-red or grayish-red, bearing longitudinal wrinkles. The texture is pliable and tough—readily fractured—with a light brown fracture surface, purplish-red peripherally, and a small woody core centrally. The herb is slightly aromatic and tastes sweet with a slight bitterness. High-grade herb material exhibits long roots, a purplish-red color, and pliable, tough texture.
Pharmacological Actions: (1) Expectorant and antitussive effects; (2) Antibacterial activity: In vitro tests show that the aqueous decoction exhibits inhibitory effects against Escherichia coli, Shigella spp. (dysentery bacilli), Proteus vulgaris, Salmonella typhi, Salmonella paratyphi, Pseudomonas aeruginosa, and Vibrio cholerae.
Medicinal efficacy: Moistens the Lung and descends rebellious Qi, resolves phlegm, and alleviates cough. Indicated for asthmatic cough with copious phlegm, acute and chronic cough, overexertion-induced cough, and hemoptysis.
Administration of for Radix Asteris (Zǐ Wǎn):
Reference:
Administration Guide for Radix Asteris (Zǐ Wǎn)
TCM Books:
(1) Internally: 5–9 grams; (2) 0.5–3 qián (≈1.5–9 grams); (3) 4.5–10 grams, Prepared as water decoction, fine powder, or pills.
✵The article records the herb Tartarian Aster Root, including its English name, Latin name, Pinyin name, properties and flavor, and botanical source—the single plant species Aster tataricus L.f.—along with a detailed introduction to the botanical features, growth characteristics, and ecological environment of this plant species; the macroscopic and microscopic features of the herb Tartarian Aster Root; its pharmacological actions, medicinal efficacy, and administration guidelines.
Pinyin Name: Zǐ Wǎn
Botanical Description: Also known as Qīng Niú Shé Tóu Huā, Aster tataricus L.f. is a perennial herb reaching 40–150 cm in height. Stems are erect, often unbranched, stout, and sparsely hispid. The rhizome is short and densely covered with numerous fibrous roots. Basal leaves are withered at anthesis (flowering stage), deciduous, oblong-spatulate or ellipsoid-spatulate, 20–50 cm long and 3–13 cm wide, with a decurrent base. Cauline leaves are alternate and sessile; leaf blades are oblong-ovate or lanceolate, 18–35 cm long and 5–10 cm wide; the midrib is stout, with 6–10 pairs of pinnate lateral veins.
Numerous capitula (flower heads), 2.5–4.5 cm in diameter, are arranged in a corymb. Involucral bracts are semiglobose, 10–25 mm wide, arranged in three series: the outer series are gradually shorter, grassy in the lower or upper portion, with acute or rounded apices and broadly membranous, purplish-red margins. The marginal florets are ligulate, ca. 20 in number, female, blue-purple, with 3-dentate ligule apices; styles are bifurcated. The central florets are tubular, hermaphroditic, yellow, with 5-dentate apices. There are five stamens; the stigma is bifurcated.
Ecological Environment: The plant grows on shady slopes and in marshes of low hills, on hilltops, and in low-lying grasslands and marshes.
Characteristics of the Herb: The rhizome is irregularly block-shaped, 2–5 cm long and 1–3 cm in diameter; the surface is violet-red or pinkish-gray, varying in size. Residues of stem bases and petiole scars occur at the apex; numerous fine roots are clustered in the middle and lower portions. The texture is hard and firm; the fracture surface is flat and oily. Numerous roots are thin and elongated, 6–15 cm long and 1–3 mm in diameter, often braided; the surface is purplish-red or grayish-red, bearing longitudinal wrinkles. The texture is pliable and tough—readily fractured—with a light brown fracture surface, purplish-red peripherally, and a small woody core centrally. The herb is slightly aromatic and tastes sweet with a slight bitterness. High-grade herb material exhibits long roots, a purplish-red color, and pliable, tough texture.
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