✵The article records the herb Areca Seed, including its English name, Latin name, Pinyin name, properties and flavor, botanical source—the dried ripe seed of a single plant species, (1) Areca catechu L.—and provides a detailed introduction to the botanical features, growth characteristics, and ecological environment of this species; the macroscopic and microscopic characteristics of the herb Areca Seed; its pharmacological actions, medicinal efficacy, and administration guidelines.
Semen Arecae (Areca Seed)
Pinyin name: Bīnɡ Lánɡ
English Name: Areca Seed, Betel Nut
Latin Name:Semen Arecae Properties and Flavor: Warm in nature, bitter and pungent in taste
Brief Introduction:Semen Arecae is the dried ripe seed of the betel palm (Areca catechu L.), used: (1) as an anthelmintic to treat ascariasis, fasciolopsiasis, ancylostomiasis, enterobiasis (oxyuriasis), and especially taeniasis; (2) to promote digestion and relieve abdominal distension, diarrhea with tenesmus, and other symptoms of food stagnation; (3) as a diuretic for edema; and (4) to arrest malarial paroxysms. The herb is commonly known as Semen Arecae, Areca Seed, or Bīnɡ Lánɡ.
Botanical Source: Classical herbal works define Semen Arecae (Areca Seed) as the dried ripe seed of Areca catechu L. It belongs to the genus Areca, family Arecaceae (Palmae), order Arecales. The commonly used species is described below:
Areca catechu L.
Botanical Description:Areca catechu L. is commonly known as Bīnɡ Lánɡ. It is an unbranched, upright, arborescent palm tree reaching 10–18 m in height—occasionally up to 30 m—with conspicuous annular leaf-scar patterns on the stem. Pinnately compound leaves arise in dense tufts at the stem apex, measuring 1.3–2 m in length; the rachis is trigonous and smooth; leaflets (pinnae) are lanceolate-linear to linear (filiform), 30–70 cm long and 2.5–6 cm wide, with narrow bases; apical leaflets often coalesce and may exhibit irregular marginal splitting.
Inflorescences emerge from the base of the lowest leaf sheath and are subtended by large, spathe-like bracts that are long-ovoid and up to 40 cm in length, smooth in texture. The inflorescence is highly branched. Flowers are dioecious. Male flowers are small, numerous, sessile, and densely appressed to the upper portions of the branches; they are usually arranged spirally (monothetic), rarely opposite; each has three thick, finely textured sepals; three ovate-oblong petals (5–6 mm long); six stamens with short, slender filaments; and three filiform pistillodes. Female flowers are larger and fewer, sessile, and grow on the lower portion of the inflorescence axis or its primary branches; each has three oblong-ovate sepals (12–15 mm long).
Fruits are ovoid or oblong, 3–5 cm (sometimes 5–6 cm) long, orange-yellow at maturity; the pericarp is thick and fibrous; the calyx and corolla persist and turn reddish at maturity. Seeds are ovoid with a truncate base. Flowering occurs twice annually—from March to August—and winter-flowering inflorescences typically do not set fruit. Fruit maturation spans December to June of the following year.
Major Cultivars: Approximately 36 Areca species are recognized worldwide, and regional classification systems vary. For example, farmers in Hainan classify cultivars based on inflorescence and fruit morphology into long-pedicelled and short-pedicelled types. Yield, alkaloid profile and content, medicinal value, and biological and ecological traits differ significantly among cultivars.
Ecological Environment:Areca catechu is native to Malaysia and is widely distributed across Southeast Asia, tropical Asia, and the Pacific region—including Papua New Guinea, the Solomon Islands, Fiji, Vanuatu, and Micronesia. It occurs sporadically in the Sika Islands, the Mariana Islands, and the Marshall Islands. In Hawaii, it is cultivated solely as an ornamental plant. It is cultivated in China and grown commercially in Sri Lanka.
Growth Characteristics:Areca catechu is a warm- and moisture-requiring, sun-loving (heliophilous) species that thrives in hot, humid, high-rainfall climates. It commonly occurs in lowland valleys, along stream banks and slopes, in secondary tropical rainforests, and in humus-rich gullies, ridges, and open woodlands. It prefers slightly acidic to neutral, well-drained sandy loam soils.
Areca is mainly distributed between latitudes 28°N and 28°S. The optimum temperature is 25–28 °C (Celsius, or 77–82.4 °F), the minimum temperature is not lower than 10 °C (Celsius, or 50 °F), and the maximum temperature is not above 40 °C (Celsius, or 104 °F). It is tolerant of fertility but not of cold; it begins to defoliate at 16 °C (Celsius, or 60.8 °F) and suffers freezing damage at 5 °C (Celsius, or 41 °F). Shade requirement during the seedling stage is 50%–60%; mature trees require full sun exposure. It grows well at elevations of 0–1,000 meters and with an annual rainfall of 1,500–2,200 mm. Fields with deep soil layers and organic matter–rich sandy loam are ideal for cultivation.
Characteristics of the Herb: Seeds are oblate or conical, with a blunt apex, flat and broad base, height of 1.5–3 cm, and base diameter of 1.5–3 cm. The surface ranges from pale yellowish-brown to dark brown, bearing slightly concave, pale reticulated lines; occasionally, silvery-white endocarp patches or pericarp fibers adhere to the surface. A concave pit is present at the center of the base (the micropylar region), with a large, light-colored hilum adjacent to it. The herb is extremely firm and hard in texture; marble-like striations are visible on the cross-section—formed by the reddish-brown exosperm (seed coat) and outer endosperm erroneously embedded into the whitish inner endosperm. Longitudinal sections through the micropyle reveal internal cavities, and contain small, shriveled embryos. The herb has a faint odor and a slightly bitter taste.
In 2003, the International Agency for Research on Cancer (IARC) published its conclusion that “areca nut is carcinogenic to humans (Group 1)”, based on a comprehensive review of hundreds of studies from seven regions. This authoritative classification indicates that regular consumption of areca nut may cause cancer. Furthermore, a 2010 study attributed 38% of oral cancer cases in the population to betel nut chewing and 31% to smoking. Researchers recommended cessation of betel nut use and smoking to prevent oral cancer.
Pharmacological Actions: (1) Anthelmintic activity: Semen Arecae exhibits strong inhibitory effects against Taenia solium (pork tapeworm); it paralyzes the entire worm body. Against Taenia saginata (beef tapeworm), it paralyzes only the scolex and immature proglottids. It also demonstrates anthelmintic activity against Enterobius vermicularis (pinworm), Ascaris lumbricoides (roundworm), Ancylostoma duodenale and Necator americanus (hookworms), Mastigophora, Fasciolopsis buski, and shows some preventive effect against schistosomiasis (hematodiasis). (2) Antimicrobial activity: Areca aqueous extract exhibits varying degrees of inhibition against dermatophytes, including Trichophyton schoenleinii and Trichophyton violaceum; the aqueous extract also inhibits influenza virus. (3) Effects on reproductive physiology: It interferes with sperm development and induces uterine contractions during pregnancy. (4) Additional effects: Antihypertensive and anticancer activities, among others. (5) Gastrointestinal effects.
Medicinal Efficacy: Anthelmintic (dispelling and killing parasites), promoting digestion and resolving food retention or Qi stagnation, regulating Qi circulation, descending rebellious Qi, alleviating edema, and preventing malaria onset or recurrence. Indications include taeniasis, ascariasis, fasciolopsiasis (intestinal fluke infection), parasitic malnutrition (malnutrition due to helminthic infestation), abdominal pain associated with parasitism, dyspepsia (food retention and indigestion), diarrhea, epigastric distension and pain, tenesmus (rectal tenesmus), edema, beriberi, malaria, and phlegm-mass disorders.
Administration of Semen Arecae (Bīnɡ Lɑnɡ):
Reference:
Administration Guide for Semen Arecae (Bīnɡ Lɑnɡ)
TCM Books:
(1) Internally: 3–10 grams for general use; 30–60 grams when used specifically to expel tapeworms or Fasciolopsis buski. (2) Internally: water decoction, 1.5–3 qián (approximately 4.5–9 grams); for single-herb anthelmintic therapy, dosage may be increased to 2–3 liáng (~60–90 grams); alternatively, prepared as pills or powder. External use: Wash with decoction, or apply finely powdered herb mixed with appropriate medium. (3) Internally: water decoction, 6–15 grams; for single-herb anthelmintic therapy, dosage may reach 60–90 grams; alternatively, prepared as pills or powder.
Contraindications, Precautions, and Adverse Reactions: Semen Arecae should be used with caution—or avoided—in cases of Qi deficiency and collapse.
✵The article records the herb Areca Seed, including its English name, Latin name, Pinyin name, properties and flavor, botanical source—the dried ripe seed of a single plant species, (1) Areca catechu L.—and provides a detailed introduction to the botanical features, growth characteristics, and ecological environment of this species; the macroscopic and microscopic characteristics of the herb Areca Seed; its pharmacological actions, medicinal efficacy, and administration guidelines.
Pinyin name: Bīnɡ Lánɡ
Botanical Description: Areca catechu L. is commonly known as Bīnɡ Lánɡ. It is an unbranched, upright, arborescent palm tree reaching 10–18 m in height—occasionally up to 30 m—with conspicuous annular leaf-scar patterns on the stem. Pinnately compound leaves arise in dense tufts at the stem apex, measuring 1.3–2 m in length; the rachis is trigonous and smooth; leaflets (pinnae) are lanceolate-linear to linear (filiform), 30–70 cm long and 2.5–6 cm wide, with narrow bases; apical leaflets often coalesce and may exhibit irregular marginal splitting.
Fruits are ovoid or oblong, 3–5 cm (sometimes 5–6 cm) long, orange-yellow at maturity; the pericarp is thick and fibrous; the calyx and corolla persist and turn reddish at maturity. Seeds are ovoid with a truncate base. Flowering occurs twice annually—from March to August—and winter-flowering inflorescences typically do not set fruit. Fruit maturation spans December to June of the following year.
Ecological Environment: Areca catechu is native to Malaysia and is widely distributed across Southeast Asia, tropical Asia, and the Pacific region—including Papua New Guinea, the Solomon Islands, Fiji, Vanuatu, and Micronesia. It occurs sporadically in the Sika Islands, the Mariana Islands, and the Marshall Islands. In Hawaii, it is cultivated solely as an ornamental plant. It is cultivated in China and grown commercially in Sri Lanka.
Areca is mainly distributed between latitudes 28°N and 28°S. The optimum temperature is 25–28 °C (Celsius, or 77–82.4 °F), the minimum temperature is not lower than 10 °C (Celsius, or 50 °F), and the maximum temperature is not above 40 °C (Celsius, or 104 °F). It is tolerant of fertility but not of cold; it begins to defoliate at 16 °C (Celsius, or 60.8 °F) and suffers freezing damage at 5 °C (Celsius, or 41 °F). Shade requirement during the seedling stage is 50%–60%; mature trees require full sun exposure. It grows well at elevations of 0–1,000 meters and with an annual rainfall of 1,500–2,200 mm. Fields with deep soil layers and organic matter–rich sandy loam are ideal for cultivation.
Characteristics of the Herb: Seeds are oblate or conical, with a blunt apex, flat and broad base, height of 1.5–3 cm, and base diameter of 1.5–3 cm. The surface ranges from pale yellowish-brown to dark brown, bearing slightly concave, pale reticulated lines; occasionally, silvery-white endocarp patches or pericarp fibers adhere to the surface. A concave pit is present at the center of the base (the micropylar region), with a large, light-colored hilum adjacent to it. The herb is extremely firm and hard in texture; marble-like striations are visible on the cross-section—formed by the reddish-brown exosperm (seed coat) and outer endosperm erroneously embedded into the whitish inner endosperm. Longitudinal sections through the micropyle reveal internal cavities, and contain small, shriveled embryos. The herb has a faint odor and a slightly bitter taste.
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