Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 types of flowering crops native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Definitely the greatest species diversity is in eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters extra tall, however, many are small trees and shrubs, and more lianas achieving up to 30 m (98 ft) by climbing up trees and shrubs. They could be either deciduous or evergreen, though the cultivated temperate kinds are deciduous extensively.Having been introduced to the Azores, H. macrophylla is now 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 plants are created from planting season to late fall months; they grow in flowerheads (corymbs or panicles) most often at the ends of the stems.
Typically the flowerheads contain two types of blossoms: small non-showy blossoms in the guts or interior of the flowerhead, and large, showy blossoms with large colourful sepals (tepals). These showy plants are often lengthened in a wedding ring, or to the surface of the small flowers. Plant life in untamed populations typically have few to none of them of the showy plants, while cultivated hydrangeas have been picked and bred to have significantly more of the bigger type flowers.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which includes the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blossoms are large circular flowerheads resembling pom-poms or, as the name suggests, the mind of any mop. On the other hand, 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 blooms of some rhododendrons and viburnums can appear, initially, similar to those of some hydrangeas.Soil and colors acidityIn most species the flowers are white, but in some types (notably H. macrophylla), can be blue, red, green, light crimson, or dark purple. In these types the color is affected by the existence of aluminum ions which can be found or tangled up depending after the land 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 blossom pigments in the presence of aluminium ions which may be adopted into hyperaccumulating crops.[6] Decreasing the pH of potting soils or mixes usually does not change the bloom color to blue, because these soils have no aluminum ions. The ability to blue or green a hydrangea is also affected by the cultivar. Some plants are selected because of their ability to be blued, while others are bred and selected to be red, white or pink. The flower color of most other Hydrangea species is not influenced by aluminum and can't be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
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Pictures: Panicle Hydrangea 39;Quick Fire39; Hydrangea by ms_greenj
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Hydrangea paniculata 39;Quick Fire39; / Hydrangea paniculata 39;Quick F
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