Hydrangea acuminata
Image: Kurosaki, N. (cc-by)
NameHydrangea acuminata
Scientific NameHydrangea serrata var. acuminata
Common NamesHydrangea acuminata, Mountain Hydrangea, Tea Hydrangea
Plant FamilyHydrangeaceae
Natural HabitatNative to mountainous regions of Japan and Korea, typically found in forests, along paths, and in moist, shaded areas at moderate altitudes. The specimen was collected in a forest by a path at approximately 1000m altitude in Honshu, Japan.
Parts Usedroot,leaf,flower
Medicinal Actionsdiuretic,anti-inflammatory,astringent
Traditional UsesTraditionally used for urinary tract infections, kidney and bladder stones, and prostate conditions due to its diuretic and lithotriptic properties. In Japan, a specific cultivar of Hydrangea serrata ('Amacha') is used to make a sweet tea for ceremonial purposes and for its purported health benefits.
Active ConstituentsHydrangin, hydrangenol, phyllodulcin, saponins, flavonoids, coumarins
Preparation Methodsinfusion,decoction,tincture,powder
Contraindications & WarningsNot recommended for pregnant or breastfeeding women, individuals with severe kidney disease, or those taking diuretics. Large doses may cause gastrointestinal upset.
Cultivation NotesThrives in partial shade to full sun (with adequate moisture), preferring moist, well-drained, acidic to neutral soil. Requires consistent watering, especially during dry periods, and benefits from protection from harsh afternoon sun.
Raritycommon
Description
A deciduous shrub characterized by serrated, ovate leaves and lacecap-style inflorescences, featuring both showy sterile florets and smaller fertile flowers. The specimen displays dried leaves and mature fruit/seed heads, indicative of its woody growth habit.
