Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 types of flowering vegetation native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Undoubtedly the greatest kinds diversity is within eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters tall, but some are small trees, and others lianas attaining up to 30 m (98 feet) by climbing up trees. They can be either deciduous or evergreen, though the extensively cultivated temperate kinds are deciduous.Having been introduced to the Azores, H. macrophylla is very common now, on Faial particularly, which is recognized as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea flowers are produced from planting season to late fall; they expand in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Usually the flowerheads contain two types of flowers: small non-showy blossoms in the center or interior of the flowerhead, and large, showy flowers with large brilliant sepals (tepals). These showy flowers tend to be expanded in a engagement ring, or to the exterior of the small flowers. Vegetation in outrageous populations have few to none of the showy blooms typically, while cultivated hydrangeas have been bred and preferred to have significantly more of the bigger type blooms.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which includes the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead flowers are large rounded flowerheads resembling pom-poms or, as the name means, the head of the mop. In contrast, lacecap flowers bear round, flat flowerheads with a center core of subdued, small plants encircled by outer bands of larger blossoms having showy tepals or sepals.
The plants of some viburnums and rhododendrons can appear, at first glance, much like those of some hydrangeas.Colors and dirt acidityIn most varieties the plants are white, however in some species (notably H. macrophylla), can be blue, red, green, light purple, or dark purple. In these kinds the colour is afflicted by the presence of light weight aluminum ions which can be found or tangled up depending upon the ground pH. For H. macrophylla and H. serrata cultivars, the flower color can be determined by the relative acidity of the soil: an acidic soil (pH below 7), will have available aluminum ions and typically produce flowers that are blue to purple, whereas an alkaline soil (pH above 7) will tie up aluminum ions and lead to pink or red flowers.
This is the effect of a color change of the rose pigments in the existence of aluminium ions that can be adopted into hyperaccumulating vegetation.[6] Lowering the pH of potting soils or mixes usually does not change the bloom color to blue, because these soils have no aluminum ions. The ability to blue or green a hydrangea is also inspired by the cultivar. Some plants are selected for his or her ability to be blued, while others are bred and selected to be red, pink or white. The flower color of most other Hydrangea species is not damaged by aluminum and can't be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
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2007_185047_50 Hydrangea anomala ssp. petiolaris klatrehortensie
Hydrangea petiolaris Climbing Hydrangea drapes a fence and arbor in
Hydrangea petiolaris is slow to get established, but will then
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