Hydrangea (/ha?'dre?nd?i?/;common titles hydrangea or hortensia) is a genus of 70-75 kinds of flowering vegetation native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest types diversity is at eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters extra tall, however, many are small trees, among others lianas getting up to 30 m (98 foot) by climbing up trees and shrubs. They could be either evergreen or deciduous, although cultivated temperate kinds are all deciduous greatly.Having been introduced to the Azores, H. macrophylla is now very common, particularly on Faial, which is recognized as the "blue island" due to the multitude of hydrangeas present on the island.Life cycleHydrangea blooms are produced from planting season to late fall months; 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 guts or interior of the flowerhead, and large, showy bouquets with large vibrant sepals (tepals). These showy blossoms tend to be lengthened in a diamond ring, or to the surface of the tiny flowers. Vegetation in outrageous populations have few to none of them of the showy blossoms typically, while cultivated hydrangeas have been chosen and bred to have significantly more of the bigger 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 round flowerheads resembling pom-poms or, as the name indicates, the brain of any 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, comparable to those of some hydrangeas.Soil and colors acidityIn most varieties the blooms are white, but in some types (notably H. macrophylla), can be blue, red, pink, light purple, or dark purple. In these species the colour is influenced by the occurrence of 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 dependant on 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 the effect of a color change of the blossom pigments in the occurrence of aluminium ions that can be taken up into hyperaccumulating vegetation.[6] Lowering the pH of potting soils or mixes usually does not change the flower color to blue, because these soils have no aluminum ions. The capability to blue or pink a hydrangea is also inspired by the cultivar. Some plants are selected because of their 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 affected by aluminum and can't be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
Where do Flowers Transport You? ~ Gatherings from Ireland 208
Hydrangea, Hortensja: lipca 2013
HYDRANGEA “NUOVI ARRIVI” 2013::Vivai Priola
bleu hydrangea: July 2013
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