Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 types of flowering vegetation local 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. The majority are shrubs 1 to 3 meters large, but some are small trees and shrubs, among others lianas reaching up to 30 m (98 ft) by climbing up trees. They could be either evergreen or deciduous, though the generally cultivated temperate varieties are deciduous.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 vast number of hydrangeas present on the island.Life cycleHydrangea flowers are produced from planting season to late autumn; 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 bouquets in the guts or interior of the flowerhead, and large, showy plants with large bright colored sepals (tepals). These showy bouquets are often prolonged in a ring, or to the surface of the small flowers. Plants in wild populations routinely have few to nothing of the showy flowers, while cultivated hydrangeas have been picked and bred to have 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 circular flowerheads resembling pom-poms or, as the name implies, the relative head of the mop. On the other hand, lacecap flowers bear round, flat flowerheads with a center core of subdued, small blooms bounded by outer bands of larger bouquets having showy tepals or sepals.
The blooms of some rhododendrons and viburnums can seem, initially, comparable to those of some hydrangeas.Colors and earth acidityIn most kinds the plants are white, however in some kinds (notably H. macrophylla), can be blue, red, pink, light crimson, or dark purple. In these kinds the colour is affected by the presence of aluminum ions which are available or tangled up depending upon the dirt 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 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 result in pink or red flowers.
This is the effect of a color change of the bloom pigments in the occurrence of aluminium ions which can be taken up into hyperaccumulating crops.[6] Bringing down the pH of potting soils or mixes usually will not change the blossom 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 their 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 can't be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
Blue Hydrangea For the garden Pinterest
Hydrangea Flowers I39;m Growing Pinterest
Hydrangea Hydrangea Pinterest
Found on en.wikipedia.org
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