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a family of dicotyledonous plants in-including small trees or shrubs, lianas, undershrubs, and grasses. The flowers are clustered in cymes. The fruit is a pod and is rarely baccate. There are about 20 genera and more than 250 species in the temperate and subtropical regions of the northern hemisphere, primarily in North America and East Asia. In the USSR there are seven species, representatives of the Hydrangea, Deutzia, and Philadelphus genera.

Many Hydrangeaceae, once wild, often are grown in gardens and parks as ornamental and melliferous plants. The attribution of Hydrangeaceae to the Saxifragaceae family has become obsolete. Hydrangeaceae should be grouped with the Escalloniaceae. The genus Philadelphus and genera closely related to it are sometimes assigned to the special family Philadelphaceae.


Zaikonnikova, T. I., “O samostoiatel’nosti semeistva Hydrangeaceae Dum.” In Novosti sistematiki vysshikh rastenii. Moscow-Leningrad, 1964.
Takhtadzhian, A. L. Sistema i filogeniia tsvetkovykh rastenii. Moscow-Leningrad, 1966.
References in periodicals archive ?
Contort petals occur in Philadelphus of Hydrangeaceae (de Candolle, 1827; Eichler, 1878).
costatus, were originally described as belonging to the Saxifragalean complex and compared to Hydrangeaceae, Vahliaceae, Escalloniaceae and Saxifragaceae (Friis & Skarby, 1982; Friis, 1984).
A phylogenetic analysis of Hydrangeaceae based on sequences of the plastid gene marK and their combination with rbcL and morphological data.
undulatas Fowler & Turner [151] CHLORANTHALES Chloranthaceae Chloranthus spicatus [251] COMMELINALES Commelinaceae Cochliostema odoratissima [121] CORNALES Hydrangeaceae Philadelphus coronarius L.
In the large structural study on Rosidae by Hufford (1992), several new results came out that were later confirmed by molecular studies, such as nonmonophyly of hamamelids, the close relationships of Loasaceae and Hydrangeaceae, and the position of Sarraceniaceae in asterids.
Many species of the Gentianales (as defined in this paper) have been used as antimalarial treatments; it is thus interesting to note that the suspected sister group is known to have antimalarial alkaloids as well, in particular, species of Dichroa and Hydrangea, both in the Hydrangeaceae (Watt & Breyer-Brandwijk, 1962).