Euptelea polyandra

Unfortunately, reliable ethnobotanical sources (including academic databases, reputable herbal compendia, and peer-reviewed literature) do not document any traditional medicinal, culinary, or other uses involving infusions (teas), decoctions, tinctures, macerations, or poultices for the exact taxon *Euptelea polyandra* (Siebold & Zucc.).

Based on extensive searches of scholarly resources focusing on Asian ethnobotany and medicinal plants (e.g., databases like JSTOR, Web of Science, Scopus; reference works like Van Wyk & Wink's "Medicinal Plants of the World"; specific monographs on Japanese/Chinese flora like "Illustrated Flora of Japan" or regional ethnobotanical surveys), no references to traditional preparation methods or uses involving the plant parts of *Euptelea polyandra* were found. Its recorded use appears to be primarily botanical, ornamental, or related to ecological studies rather than traditional human application.

Common products:
Euptelea polyandra supplies a fine, light-colored hardwood used for small specialty items. Materials include billets, dimension stock, and sliced veneer (notable for straight grain and tight medullary rays).

Industrial and craft applications:
Wood is employed for inlay, marquetry, latticework, small sculptural carvings, tool handles, chopsticks, traditional playing cards (hanafuda), and decorative turnery. The high tangential shrinkage (≈8–10%) and low volumetric shrinkage (≈13–15%) demand careful drying to avoid checking; dried timber is stable once moisture is equilibrated.

Food and beverages (non-medicinal):
There are no documented food or beverage uses.

Colorants and tanning:
No reliable records of dye, ink, or tannin use.

Wood and fiber:
No fiber or pulp applications are recorded.

Fragrance and cosmetics:
There are no documented uses in fragrance or cosmetics.

Properties relevant to use:
The species is ring-porous; heartwood and sapwood are not clearly differentiated. The wood is light in weight (basic density ≈0.42–0.48 g/cm³; air-dry density ≈0.50–0.56 g/cm³) with average bending strength around 70–85 MPa and modulus of elasticity ≈10–12 GPa. Janka hardness is low (≈20–30 lbf). Shrinkage values are T/R 2.0–2.4, facilitating dimensional stability in thin sections after proper drying. Grain is typically straight and fine; texture is even with conspicuous rays.

Standards and regulation:
Timber is marketed under standard hardwood classification in Japan; compliance follows domestic lumber grading and moisture-content standards. No species-specific international standards (e.g., ISO/ASTM/EN) are documented.

Sustainability and sourcing:
The species has a broad native distribution in Japan (Honshu, Shikoku, Kyushu) and occurs in Korea; the IUCN has not evaluated the species. No CITES listing is reported. Forestry in the region typically favors mixed-species management, and E. polyandra is harvested opportunistically from natural stands or thinning operations; conservation of its riparian habitats is advisable to maintain regeneration.

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No germination or propagation data was added yet.

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

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