Hydrangea petiolaris
Encyclopedia
Hydrangea petiolaris, a Climbing hydrangea (syn: Hydrangea anomala subsp. petiolaris), is a species of Hydrangea
native to the woodland
s of Japan
, the Korean peninsula
, and on Sakhalin
island of easternmost Siberia
in the Russian Far East
.
Hydrangea petiolaris is sometimes treated as a subspecies
of the closely related Hydrangea anomala
from China
, Myanmar
, and the Himalaya, as Hydrangea anomala subsp. petiolaris. The Hydrangea anomala species differs in being smaller (to 12 metres (39.4 ft) ) and having flower corymbs up to 15 cm diameter. The common name Climbing hydrangea
is applied to both species, or to species and subspecies.
plant, growing to 30 to 50 ft (9.1 to 15.2 m) height and 5 to 6 ft (1.5 to 1.8 m) wide. It grows up tree
s and rock faces
in its native
Asian habitat
s, climbing by means of small aerial root
s 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 flower
s 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.
in Europe and North America. Climbing hydrangea is grown either on masonry walls or on sturdy trellis
es or fences. It is at its best where it gets morning sun and afternoon shade. Its clinging rootlets are not as strong as most other wall-climbing vine
s, and so is often anchored with supplemental gardening ties. Its outward-reaching side shoots can be pruned back to a pair of buds to espalier
it flatter against its support. When pruned during flowering, the blooms are useful in bouquets.
It is also grown as a ground cover, to eventually to grow over a garden area of up to 200 ft2.
Hydrangea
Hydrangea is a genus of about 70 to 75 species of flowering plants native to southern and eastern Asia and North and South America. By far the greatest species diversity is in eastern Asia, notably China, Japan, and Korea...
native to the woodland
Woodland
Ecologically, a woodland is a low-density forest forming open habitats with plenty of sunlight and limited shade. Woodlands may support an understory of shrubs and herbaceous plants including grasses. Woodland may form a transition to shrubland under drier conditions or during early stages of...
s of Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
, the Korean peninsula
Korean Peninsula
The Korean Peninsula is a peninsula in East Asia. It extends southwards for about 684 miles from continental Asia into the Pacific Ocean and is surrounded by the Sea of Japan to the south, and the Yellow Sea to the west, the Korea Strait connecting the first two bodies of water.Until the end of...
, and on Sakhalin
Sakhalin
Sakhalin or Saghalien, is a large island in the North Pacific, lying between 45°50' and 54°24' N.It is part of Russia, and is Russia's largest island, and is administered as part of Sakhalin Oblast...
island of easternmost Siberia
Siberia
Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...
in the Russian Far East
Russian Far East
Russian Far East is a term that refers to the Russian part of the Far East, i.e., extreme east parts of Russia, between Lake Baikal in Eastern Siberia and the Pacific Ocean...
.
Hydrangea petiolaris is sometimes treated as a subspecies
Subspecies
Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...
of the closely related Hydrangea anomala
Hydrangea anomala
Hydrangea anomala is a species of hydrangea native to the woodlands of the Himalaya, southern and central China and northern Myanmar.It is a woody climbing plant, growing to 12 m height up trees or rock faces, climbing by means of small aerial roots on the stems...
from China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...
, Myanmar
Myanmar
Burma , officially the Republic of the Union of Myanmar , is a country in Southeast Asia. Burma is bordered by China on the northeast, Laos on the east, Thailand on the southeast, Bangladesh on the west, India on the northwest, the Bay of Bengal to the southwest, and the Andaman Sea on the south....
, and the Himalaya, as Hydrangea anomala subsp. petiolaris. The Hydrangea anomala species differs in being smaller (to 12 metres (39.4 ft) ) and having flower corymbs up to 15 cm diameter. The common name Climbing hydrangea
Climbing hydrangea
Climbing hydrangea is a common name of two species of Hydrangea, and also of a related species in another genus.*Hydrangea anomala*Hydrangea petiolaris*Schizophragma hydrangeoides...
is applied to both species, or to species and subspecies.
Description
Hydrangea petiolaris is a vigorous woody climbing vineVine
A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...
plant, growing to 30 to 50 ft (9.1 to 15.2 m) height and 5 to 6 ft (1.5 to 1.8 m) wide. It grows up tree
Tree
A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is cited by some authors, varying from 3 m to...
s and rock faces
Cliff
In geography and geology, a cliff is a significant vertical, or near vertical, rock exposure. Cliffs are formed as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers. Cliffs are usually...
in its native
Native plant
Native plant is a term to describe plants endemic or naturalized to a given area in geologic time.This includes plants that have developed, occur naturally, or existed for many years in an area...
Asian habitat
Habitat
* Habitat , a place where a species lives and grows*Human habitat, a place where humans live, work or play** Space habitat, a space station intended as a permanent settlement...
s, climbing by means of small aerial root
Aerial root
Aerial roots are roots above the ground. They are almost always adventitious. They are found in diverse plant species, including epiphytes such as orchids, tropical coastal swamp trees such as mangroves, the resourceful banyan trees, the warm-temperate rainforest rātā and pōhutukawa Aerial roots...
s on the stems. The leaves
Leaf
A leaf is an organ of a vascular plant, as defined in botanical terms, and in particular in plant morphology. Foliage is a mass noun that refers to leaves as a feature of plants....
are deciduous
Deciduous
Deciduous means "falling off at maturity" or "tending to fall off", and is typically used in reference to trees or shrubs that lose their leaves seasonally, and to the shedding of other plant structures such as petals after flowering or fruit when ripe...
, ovate, 4–11 cm long and 3–8 cm broad, with a heart-shaped base, coarsely serrated margin and acute apex.
The flower
Flower
A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...
s 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
Fruit
In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...
is a dry urn-shaped capsule
Capsule (fruit)
In botany a capsule is a type of simple, dry fruit produced by many species of flowering plants. A capsule is a structure composed of two or more carpels that in most cases is dehiscent, i.e. at maturity, it splits apart to release the seeds within. A few capsules are indehiscent, for example...
3–5 mm diameter containing several small winged seeds.
Cultivation
Hydrangea petiolaris is cultivated as an ornamental plantOrnamental plant
Ornamental plants are plants that are grown for decorative purposes in gardens and landscape design projects, as house plants, for cut flowers and specimen display...
in Europe and North America. Climbing hydrangea is grown either on masonry walls or on sturdy trellis
Trellis
Trellis may refer to:* Trellis Drainage System* Trellis , an architectural structure often used to support plants* Trellis , a special kind of graph, often used in coding...
es or fences. It is at its best where it gets morning sun and afternoon shade. Its clinging rootlets are not as strong as most other wall-climbing vine
Vine
A vine in the narrowest sense is the grapevine , but more generally it can refer to any plant with a growth habit of trailing or scandent, that is to say climbing, stems or runners...
s, and so is often anchored with supplemental gardening ties. Its outward-reaching side shoots can be pruned back to a pair of buds to espalier
Espalier
Espalier is the horticultural and ancient agricultural practice of controlling woody plant growth by pruning and tying branches so that they grow into a flat plane, frequently in formal patterns, against a structure such as a wall, fence, or trellis, and also plants which have been shaped in this...
it flatter against its support. When pruned during flowering, the blooms are useful in bouquets.
It is also grown as a ground cover, to eventually to grow over a garden area of up to 200 ft2.
See also
- Hydrangea anomalaHydrangea anomalaHydrangea anomala is a species of hydrangea native to the woodlands of the Himalaya, southern and central China and northern Myanmar.It is a woody climbing plant, growing to 12 m height up trees or rock faces, climbing by means of small aerial roots on the stems...