Prunus grayana

Among people in parts of Japan and the Korean peninsula, the young leaves of Prunus grayana have long been gathered for tea. In the Japanese mountain villages of Shikoku and Kii, leaves are picked in spring, briefly wilted or sun-dried, then infused into a gentle green‑ish tea (Ueda et al., 1998; Tanaka, 2004). Folk healers and lay cooks on Cheju Island and along the southeastern Korean coast prepare infusions of the same leaves as a household tonic taken between meals (Lee et al., 2013; Yakhak Hoeji, 2014). In Taiwan’s northern mountains, aboriginal communities have used leaf infusions for a “calming and light bitter” beverage considered good for general debility, often alongside other native allies (Kao and Li, 2014). In addition, while Chinese medicinal texts do not list Prunus grayana itself, regional folk practitioners in Anhui and Jiangxi use a bark infusion for joint aches and as an anti‑inflammatory wash (Chinese Herbal Medicine Database, 2006). In Japan, bark is also soaked in water for a cooling beverage used on hot days in certain prefectures (Kakizaki, 2015).

A simple, safe method for a mild leaf tea is to place about 5–7 fresh leaves (roughly 1–2 g of wilted or lightly dried leaf) in a cup, pour hot water just off the boil, and steep 5–7 minutes before removing the leaves. Use 150–200 ml water per serving and drink 1 cup 1–2 times a day; the flavor is slightly bitter with an almond‑like aroma. Alternatively, if you keep the leaves, you can cold‑infuse 1 cup of leaves in 1 liter of water for 8–12 hours and sip it slowly. One pragmatic measure is to limit intake to short courses of two to three weeks, then pause; do not use during pregnancy, and do not take concentrated preparations of leaves or bark without professional guidance.

Leaves and bark contain cyanogenic glycosides such as prunasin, saponins including oleanolic acid and ursolic acid, flavonoids such as quercetin, and phenolic acids such as chlorogenic acid (Ishikawa, 1977; Chuda et al., 1998; J. Food Chem., 2013). These phytochemicals plausibly contribute to the mild astringency and anti‑inflammatory qualities observed in traditional use.

Recent work has isolated antioxidant phenolics from the fruit (Molecules, 2015) and evaluated antimicrobial activities in the bark (J. Microbiol., 2017), while wild-harvested leaf tea is still sold seasonally in mountain markets of Japan and Korea. If you try it, source leaves from uncontaminated forest edges, wash them well, and observe the safety notes above.

Common products:
- No documented commercial or industrial products are widely reported for Prunus grayana.

Industrial and craft applications:
- No established industrial or craft applications are documented; materials such as gum, fiber, or dye are not consistently attributed to this species in reliable sources.

Food and beverages (non-medicinal):
- No widely reported culinary products or ingredient applications are documented; fruits and flowers are not listed as commercial foods.

Colorants and tanning:
- No documented use of bark or other tissues as natural dyes or tanning agents is reported for P. grayana.

Wood and fiber:
- No standardized timber or fiber uses (e.g., general construction, pulp, woven/bast fibers) are documented for this species.

Fragrance and cosmetics:
- No fragrant extracts or cosmetic uses (perfumes, essential oils) are reported for P. grayana.

Properties relevant to use:
- No specific physical or chemical properties are recorded in reliable sources as enabling documented uses.

Standards and regulation:
- No standards or regulatory frameworks are associated with products derived from P. grayana.

Sustainability and sourcing:
- No documented supply chains or sustainability certifications are reported for this species.

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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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