Aristolochia mollissima

Illicium verum is the star anise tree, its fruits yielding the fragrant spice. Chinese cooks and pharmacists have used its dried fruit and seed as aromatic carminatives in teas and decoctions since the classic Materia Medica. In Hong Kong and southern China, “bajiao” infusions of crushed fruits are taken after meals to reduce gas and bloating, and the warm, “sweet-pepper” tea is a common home remedy for coughs and cold stomach pain (Chen and Chen, 2004). Across the border in northern Vietnam, rural households brew dried star anise as a carminative tea and add a pinch to simmering broths for colicky babies, practices noted in early ethnomedical surveys (Quang et al., 2003; Nguyen, 2005). In the Caribbean, Haitians have long used star-anise “tisane” as a digestive after heavy meals, a method later formalized in regional pharmacopoeias (Hôpital Albert Schweitzer Haïti, 1988).

A simple carminative tea uses dried whole fruits: crush or lightly crack 2–3 g (about 6–8 star‑shaped fruit fragments) and steep them in 200 ml of just‑boiled water, covered, for 10–12 minutes. Strain and drink up to 2 cups daily after meals. A 1:5 (w/v) tincture can be prepared with dried fruit and 45% ethanol; macerate for 2–3 weeks, shaking daily, then press and filter. The volatile oil responsible for the warm, sweet aroma is the principal carminative; eugenol contributes antibacterial and mild spasmolytic effects (Hoffmann and Balun, 1987; Lee, 2005). Star anise is generally safe in culinary amounts, but its volatile oil is potent; avoid concentrated oil or large repeated doses during pregnancy and in children, and stop if skin irritation or nausea occurs.

Active constituents include the volatile trans‑anethole, which imparts the characteristic sweet‑pepper aroma and is the main driver of carminative action, along with smaller amounts of eugenol and safrole; the seed also contains fixed oils, phenolics, and organic acids (Knezevic and Pevec, 2017; Mohamed et al., 2017; Skoog et al., 2014). These compounds plausibly account for the traditional use in easing flatulence and soothing gastrointestinal cramps. Modern research on the volatile oil confirms antimicrobial, antifungal, and modest spasmolytic activity, supporting traditional applications (Hoffmann and Balun, 1987; Lee, 2005; Kubínová and Chlebek, 2013).

Today, dried star‑anise fruits are widely available in spice markets and pharmacies, and they remain a popular household tea for digestion and cough relief, while the essential oil is used in select over‑the‑counter formulas and complementary products.

Common products:
- Commercial, standardized extracts and isolated aristolochic acids (AA‑I, AA‑II) derived from A. mollissima are offered by analytical reagent companies as reference materials for the detection, quantification and quality‑control of aristolochic acids in herbal products and dietary supplements. These products are used in HPLC‑UV, LC‑MS and other chromatographic protocols.
- DNA barcode sequences (ITS and rbcL) of A. mollissima are deposited in public databases (e.g., GenBank, BOLD) and serve as reference data for molecular authentication of plant material in supply‑chain monitoring.
- The materials are also used in proficiency‑testing programs coordinated by national reference laboratories to ensure consistent detection of aristolochic acids in herbal dietary supplements.

Properties relevant to use:
- The species contains high levels of aristolochic acids, nitro‑phenanthrene derivatives that exhibit strong UV absorption (λmax ≈ 250 nm) and are readily extracted with methanol or acidified solvents, facilitating their analysis.
- Extraction under acidic conditions minimizes the co‑extraction of polar pigments, improving the signal‑to‑noise ratio in chromatographic analyses.
- The plant also accumulates flavonoids and coumarins, which are detectable by standard phytochemical profiling methods, making the species suitable as a source of multi‑component reference extracts.
- The presence of distinct secondary metabolites allows the species to serve as a model for studying nitrophenanthrene biosynthesis pathways in comparative genomics.

Standards and regulation:
- Aristolochic acids are classified by the International Agency for Research on Cancer (IARC) as Group 1 human carcinogens; consequently, many jurisdictions (United States Food and Drug Administration, European Union, and China’s National Medical Products Administration) have prohibited the sale of products containing Aristolochia spp.
- Laboratories handling extracts of A. mollissima must comply with biosafety level‑2 containment and OSHA guidelines for handling cytotoxic chemicals, and reference standards are subject to ISO/IEC 17025 accreditation for analytical accuracy.

Sustainability and sourcing:
- No large‑scale cultivation of A. mollissima exists; the plant is harvested from wild populations in its native range (southern China). Current collection is unregulated and occurs at low volumes.
- Due to limited distribution, habitat loss, and the absence of cultivation protocols, the species is considered vulnerable to over‑harvesting, and no conservation or sustainable‑harvest certification schemes are presently established.

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No reference genome is available on NCBI yet. We are constantly monitoring for new data.

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