Hydrangea anomala subsp. petiolaris

Plant Characteristics
Habit		vine-climber
Height:	⇕	20 m"m" can not be assigned to a declared number type with value 20.
Lifespan:	⌛	perennial

Cultivation

Scientific Names
Hydrangeaceae >	Hydrangea >	anomala >	petiolaris >

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Hydrangea petiolaris is a species native to the woodlands of Japan, Korea and Sakhalin in easternmost Siberia.

Hydrangea petiolaris is grown as an ornamental plant in Europe and North America, where it is grown either on walls or on trellises or fences. Its clinging rootlets are not as strong as most other wall-climbing vines, and so is often anchored artificially.

It is a vigorous woody climbing plant, growing to 20 m height up trees or rock faces, climbing by means of small aerial roots on the stems. The leaves are deciduous, ovate, 4-11 cm long and 3-8 cm broad, with a heart-shaped base, coarsely serrated margin and acute apex. The flowers are, produced in flat corymbs 15-25 cm diameter in mid-summer; each corymb includes a small number of peripheral sterile white flowers 2.5-4.5 cm across, and numerous small, off-white fertile flowers 1-2 mm diameter. The fruit is a dry urn-shaped capsule 3-5 mm diameter containing several small winged seeds.

It is sometimes treated as a subspecies of the closely related Hydrangea anomala from China, Myanmar, and the Himalaya; that species differs in being smaller (to 12 m) and having flower corymbs up to 15 cm diameter. The common name Climbing hydrangea is applied to both species.

Read about Hydrangea anomala subsp. petiolaris in the Standard Cyclopedia of Horticulture
Hydrangea petiolaris, Sieb. & Zucc. (H. scandens, Maxim., not DC. H. volubilis, Hort.). Climbing to 80 ft. in Japan: lvs. long-petioled, broadly ovate-cordate to elliptic, acute or acuminate, serrate, almost glabrous, 2-4 in. long: cymes rather loose, 8-10 in. across, with rather few sterile fls.; stamens 15; stylos usually 2: caps, with the calyx at the apex. July. Japan, Sakhalin.—A very variable species, figured and described by Sieb. & Zucc. under 3 different names. In gardens it is often met with under the name of Schizophragma hydrangeoides, another Japanese climber of similar habit, which, however, is easily distinguished by its sinuately dentate lvs. and its sterile fls. having only 1 large cordate sepal. The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.