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Hydrangea heteromalla - Himalayan hydrangea


Though it has long been grown in Finland, the Himalayan hydrangea has never been widely used. It flowers about the middle of summer, earlier than most other hydrangeas. It can best be distinguished from the Pee Gee hydrangeas (H. paniculata) by its flat white inflorescences. The large sterile outer flowers may be reddish. In full light the Himalayan hydrangea is leafy to ground level but in shadier spots it tends to grow higher. As a free-growing shrub it is rounded, to about 2-3m high.

In some forms the cinnamon brown bark peels attractively, though there is great variation between provenances in this regard. The large range of the species - from central and western China to the mountains of northern Vietnam - means that a large number of different forms have developed, the best of them being hardy as far north as central Finland.

In the 1980s two of the Himalayan hydrangeas growing at Mustila were selected, and named ’Axel’ and ’Peter’ after the Tigerstedt brothers. They are now in nursery production.


Hydrangea bretschneideri 'Bougie' - Mongolian hydrangea 'Bougie'


’Bougie’ is an unusual form of the species found at Arboretum Mustila; its long dangling flower clusters have a lot of double flowers in the outer sterile ring. The name ‘Bougie’ is a reference to the vine Bougainville (Bougainvillea), which has similar flowers.

Otherwise ’Bougie’ resembles the other summer hydrangeas but the flowers make it unique, and very closely associated with Mustila. The original shrub grows on the Terassi (Terrace), but younger specimens have been planted near the south-east entrance to the Alppiruusulaakso (Rhododendron Valley). The variety has also appeared in recent years among the selections available from nurseries.


Kasvin perustiedot
Suomenkielinen nimi: 
Kesähortensia 'Bougie'
3–4 m.
Mustilasta löytynyt siementaimi.
Reheväkasvuinen pensas, jolla on riippuvat, kerrotut laitakukat.
Aurinkoinen tai puolivarjoinen kasvupaikka. Tuore ja ravinteikas maa.
Vyöhykkeet I–IV.

Hydrangea bretschneideri - Mongolian hydrangea 'Bretschneideri'



The Russian Emil Bretschneider collected hydrangea seed near Peking. Separating the resulting species from each other is difficult, but this variety has a chestnut brown trunk which increasingly peels as the plant matures, and the undersides of the leaves are felted; the combination of these characteristics is perhaps the best way of recognising it.

The white inflorescences are flat and decorative, the sterile outer ring turning reddish as they age. At Mustila this variety grows on the Terassi (Terrace), the shrubs forming a beautiful arch over the path. It flowers earlier than many hydrangeas.

Hydrangea bretschneideri is generally considered extremely hardy, and the dark brown bark is attractive throughout the year.


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