Hydrangea (/ha?'dre?nd?i?/;common titles hydrangea or hortensia) is a genus of 70-75 varieties of flowering plants native to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. By far the greatest kinds diversity is in eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters extra tall, but some are small trees and shrubs, among others lianas getting up to 30 m (98 feet) by climbing up trees. They could be either evergreen or deciduous, though the cultivated temperate varieties are deciduous extensively.Having been introduced to the Azores, H. macrophylla is quite typical now, on Faial particularly, which is known as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea blooms are produced from planting season to late fall; they develop in flowerheads (corymbs or panicles) most often at the ends of the stems.
Usually the flowerheads contain two types of blooms: small non-showy bouquets in the center or interior of the flowerhead, and large, showy blooms with large brilliant sepals (tepals). These showy plants tend to be expanded in a wedding ring, or to the exterior of the tiny flowers. Plants in wild populations have few to none of them of the showy blossoms typically, while cultivated hydrangeas have been bred and picked to have 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 blossoms are large rounded flowerheads resembling pom-poms or, as the name implies, the relative mind of your 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 bouquets of some rhododendrons and viburnums can seem, initially, comparable to those of some hydrangeas.Earth and colors acidityIn most varieties the blooms are white, but in some kinds (notably H. macrophylla), can be blue, red, green, light purple, or dark crimson. In these types the color is influenced by the existence of lightweight aluminum ions which are available or tied up depending upon the ground 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 lead to pink or red flowers.
This is caused by a color change of the blossom pigments in the existence of aluminium ions which can be taken up into hyperaccumulating plant life.[6] Lowering the pH of potting soils or mixes usually will not change the rose color to blue, because these soils have no aluminum ions. The capability to blue or green a hydrangea is also influenced by the cultivar. Some plants are selected because of 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 damaged by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
Capri Hydrangea © Painting A Day: Small Masterpieces by Tina Wassel
Blue hydrangeas are one of my favourite flowers to paint. This is 10
Pink Hydrangea Painting by Doris Joa Pink Hydrangea Fine Art Prints
Kim Stenberg39;s Painting Journal: quot;Hydrangea and White Picket Fence
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