Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 types of flowering plant life 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 high, however, many are small trees, as well as others lianas attaining up to 30 m (98 feet) by climbing up trees. They can be either evergreen or deciduous, though the cultivated temperate varieties are deciduous broadly.Having been introduced to the Azores, H. macrophylla is very common now, on Faial particularly, which is known as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea bouquets are produced from planting season to late fall; they increase in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Typically the flowerheads contain two types of blooms: small non-showy plants in the guts or interior of the flowerhead, and large, showy bouquets with large multi-colored sepals (tepals). These showy bouquets are expanded in a ring often, or to the surface of the tiny flowers. Crops in crazy populations have few to nothing of the showy blossoms typically, while cultivated hydrangeas have been decided on 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 blooms are large round flowerheads resembling pom-poms or, as the name indicates, the relative head of your 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 plants of some rhododendrons and viburnums can look, at first glance, very much like those of some hydrangeas.Land and colors acidityIn most types the blossoms are white, but in some species (notably H. macrophylla), can be blue, red, pink, light purple, or dark crimson. In these kinds the color is damaged by the presence of metal ions which can be found or tied up depending upon the soil 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 produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and bring about pink or red flowers.
This is caused by a color change of the rose pigments in the existence of aluminium ions that can be taken up into hyperaccumulating plant life.[6] Lowering the pH of potting soils or mixes usually will not change the bloom color to blue, because these soils have no aluminum ions. The capability to blue or pink a hydrangea is also affected by the cultivar. Some plants are selected for their ability to be blued, while some are bred and selected to be red, white or pink. 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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