Hydrangea (/ha?'dre?nd?i?/;common brands 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 kinds diversity is within eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters high, but some are small trees, as well as others lianas achieving up to 30 m (98 foot) by climbing up trees and shrubs. They could be either deciduous or evergreen, though the cultivated temperate kinds are all deciduous generally.Having been introduced to the Azores, H. macrophylla is very common now, particularly on Faial, which is recognized as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea bouquets are created from planting season to late fall months; they increase in flowerheads (corymbs or panicles) most often at the ends of the stems.
Typically the flowerheads contain two types of plants: small non-showy blooms in the guts or interior of the flowerhead, and large, showy blooms with large vibrant sepals (tepals). These showy plants are extended in a engagement ring often, or to the exterior of the small flowers. Crops in crazy populations have few to none of them of the showy plants typically, while cultivated hydrangeas have been selected 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 flowers are large spherical flowerheads resembling pom-poms or, as the name signifies, the comparative brain of an mop. In contrast, lacecap flowers bear round, flat flowerheads with a center core of subdued, small flowers encircled by outer rings of larger flowers having showy tepals or sepals.
The bouquets of some rhododendrons and viburnums can appear, at first glance, comparable to those of some hydrangeas.Colors and garden soil acidityIn most kinds the blooms are white, however in some types (notably H. macrophylla), can be blue, red, pink, light purple, or dark crimson. In these types the colour is affected by the presence of aluminum ions which can be found or tangled up depending after the earth pH. For H. macrophylla and H. serrata cultivars, the flower color can be dependant on 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 lead to pink or red flowers.
This is caused by a color change of the flower pigments in the existence of aluminium ions which may be taken up into hyperaccumulating plant life.[6] Lowering the pH of potting soils or mixes usually does not change the flower color to blue, because these soils haven't any aluminum ions. The ability to blue or pink a hydrangea is also affected by the cultivar. Some plants are selected for his or her ability to be blued, while some are bred and selected to be red, white or pink. The flower color of most other Hydrangea species is not afflicted by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
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