Hydrangea (/ha?'dre?nd?i?/;common brands hydrangea or hortensia) is a genus of 70-75 kinds of flowering plant life indigenous to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Certainly the greatest varieties diversity is at eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters large, however, many are small trees, while others lianas getting up to 30 m (98 foot) by climbing up trees. They could be either deciduous or evergreen, though the cultivated temperate types are deciduous extensively.Having been introduced to the Azores, H. macrophylla is currently very common, on Faial particularly, which is known as the "blue island" because of the multitude of hydrangeas present on the island.Life cycleHydrangea blossoms are created from early spring to late autumn; they expand in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Typically the flowerheads contain two types of blossoms: small non-showy bouquets in the center or interior of the flowerhead, and large, showy plants with large colorful sepals (tepals). These showy blossoms are prolonged in a diamond ring often, or to the exterior of the small flowers. Plant life in outrageous populations typically have few to nothing of the showy flowers, while cultivated hydrangeas have been picked and bred to have significantly more of the larger type flowers.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead bouquets are large spherical flowerheads resembling pom-poms or, as the name implies, the head of an 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 flowers of some rhododendrons and viburnums can look, at first glance, much like those of some hydrangeas.Colors and garden soil acidityIn most types the blooms are white, but in some types (notably H. macrophylla), can be blue, red, green, light purple, or dark crimson. In these varieties the color is damaged by the presence of light weight aluminum ions which are available or tied up depending after the garden soil 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 supply aluminum ions and produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and cause pink or red flowers.
This is the effect of a color change of the flower pigments in the occurrence of aluminium ions that can be taken up into hyperaccumulating plants.[6] Lowering the pH of potting soils or mixes usually will not change the blossom color to blue, because these soils have no aluminum ions. The capability to blue or pink a hydrangea is also influenced 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 all other Hydrangea species is not affected by aluminum and can't be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
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- blue white wild Hydrangea in full bloom Scientific name: Hydrangea
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