View source for Hydrangea anomala subsp. petiolaris

{{SPlantbox
|familia=Hydrangeaceae
|genus=Hydrangea
|species=anomala
|subspecies=petiolaris
|habit=vine-climber
|Max ht box=20
|Max ht metric=m
|lifespan=perennial
|Temp Metric=°F
|jumpin=If this plant info box on watering; zones; height; etc. is mostly empty you can click on the edit tab and fill in the blanks!
|image=Hydrangea petiolaris.jpg
|image_width=240
}}
'''''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 [[tree]]s or [[cliff|rock faces]], climbing by means of small aerial roots on the stems. The [[leaf|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 [[flower]]s are, produced in flat [[corymb]]s 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 (fruit)|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.

{{Inc|
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.
}}