| Deutzia | |
|---|---|
 | |
| Deutzia gracilis | |
Scientific classification | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Cornales |
| Family: | Hydrangeaceae |
| Subfamily: | Hydrangeoideae |
| Tribe: | Philadelpheae |
| Genus: | Deutzia Thunb. |
| Type species | |
| Deutzia scabra Thunb.[1] | |
| Species | |
See text | |
Deutzia (/ˈdjuːtsiə/ or/ˈdɔɪtsiə/)[2] is agenus of about 60species offlowering plants in thefamily Hydrangeaceae,native to eastern and central Asia (from the Himalayas east to Japan and the Philippines), and Central America and also Europe. By far the highest species diversity is in China, where 50 species occur.
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The species areshrubs ranging from 1–4 m (3 ft 3 in – 13 ft 1 in) in height. Most aredeciduous, but a fewsubtropical species areevergreen. Theleaves are opposite, simple, with a serrated margin. Theflowers are produced inpanicles orcorymbs; they are white in mostspecies, sometimes pink or reddish. Thefruit is a drycapsule containing numerous smallseeds. Identification of the species is very difficult, requiring often microscopic detail of the leaf hairs and seed capsule structure.
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Deutzia was named byCarl Peter Thunberg for his friend and patron,Johann van der Deutz, 18th century botanist.[3]
The deutzias are fairly new to gardens: the exception,D. scabra, was noticed in Japanese gardens byEngelbert Kaempfer (1712) andCarl Peter Thunberg (1784) but not actually seen in Europe till the 1830s; two-thirds of the species noted in theR.H.S.Dictionary were gathered in from the wild during the 20th century.[5]
Deutzias are commonly grown asornamental plants for their white and pink flowers. Manycultivars andhybrids have been selected for garden use, including selections withdouble flowers. For example,Deutzia ×lemoinei is a hybrid ofD. gracilis andD. parviflora. The following cultivars and hybrids have gained theRoyal Horticultural Society'sAward of Garden Merit:[6]-
The temperate deutzias are mostly hardy shrubs from East Asia where winters are dependably frozen; in milder climates, like much of England, the early-flowering species and hybrids are coaxed into premature bloom by mild spells, then spoilt by frost.Alice Coats[16] remarks that deutzias have done better in Edinburgh, on the chilly east coast of Scotland, than in London. A solution in milder climates might be to site deutzia in the garden's most exposed, coldest microclimate, as is often done with early-flowering magnolias.
Identification can be difficult, and in particular, many of the plants in cultivation sold asD. scabra are actuallyD. crenata (Huxley 1992). The selected hybrid white double "Pride-of-Rochester", already in cultivation in 1881, was originated by theRochester, New York nurserymenEllwanger and Barry.[16]
Deutzia scabra is used by joiners in Japan to polish wood.[17]
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