Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 varieties of flowering vegetation native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest varieties diversity is eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters extra tall, however, many are small trees, among others lianas reaching up to 30 m (98 foot) by climbing up trees. They could be either evergreen or deciduous, although greatly cultivated temperate species are deciduous.Having been introduced to the Azores, H. macrophylla is quite typical now, on Faial particularly, which is recognized as the "blue island" due to the multitude of hydrangeas present on the island.Life cycleHydrangea blossoms are created from planting season to late fall; they develop in flowerheads (corymbs or panicles) most often at the ends of the stems.
Usually the flowerheads contain two types of bouquets: small non-showy plants in the center or interior of the flowerhead, and large, showy blooms with large colorful sepals (tepals). These showy flowers are often expanded in a ring, or to the exterior of the small flowers. Crops in crazy populations typically have few to nothing of the showy bouquets, while cultivated hydrangeas have been preferred and bred to have more of the larger type blooms.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blossoms are large spherical flowerheads resembling pom-poms or, as the name implies, the relative mind of the mop. In contrast, lacecap flowers bear round, flat flowerheads with a center core of subdued, small flowers surrounded by outer rings of larger flowers having showy sepals or tepals.
The blooms of some viburnums and rhododendrons can seem, initially, a lot like those of some hydrangeas.Land and colors acidityIn most types the bouquets are white, but in some varieties (notably H. macrophylla), can be blue, red, pink, light crimson, or dark crimson. In these varieties the colour is damaged by the occurrence of metal ions which are available or tangled up depending after the earth pH. For H. h and macrophylla. 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 cause pink or red flowers.
This is caused by a color change of the rose pigments in the occurrence of aluminium ions that can be taken up into hyperaccumulating plants.[6] Bringing down the pH of potting soils or mixes usually does not change the rose color to blue, because these soils haven't any aluminum ions. The ability to blue or pink a hydrangea is inspired by the cultivar also. Some plants are selected for his or her ability to be blued, while some are bred and selected to be red, pink or white. The flower color of most other Hydrangea species is not afflicted by aluminum and can't be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
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