Hydrangea, Gatt. der Steinbrechgewächse; meist Sträucher, in Asien u. Amerika heim., in Dtld. die Garten-H.
ETYM New Lat., from Greek hydro water + angeion vessel, capsule: cf. French hydrangée.
Any of various deciduous or evergreen shrubs of the genus Hydrangea.
Any flowering shrub of the genus Hydrangea of the saxifrage family Hydrangeaceae, native to Japan. Cultivated varieties of H. macrophylla normally produce round heads of pink flowers, but these may be blue if certain chemicals, such as alum or iron, are in the soil. The name is from the Greek for “water vessel”, after the cuplike seed capsules.