Hydrangea (/ha?'dre?nd?i?/;common titles hydrangea or hortensia) is a genus of 70-75 varieties of flowering plant life local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Probably the greatest species diversity is in eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters large, however, many are small trees, and others lianas attaining up to 30 m (98 ft) by climbing up trees. They can be either evergreen or deciduous, though the cultivated temperate types are deciduous greatly.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 multitude of hydrangeas present on the island.Life cycleHydrangea bouquets are produced from early spring to late autumn; they develop in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Usually the flowerheads contain two types of plants: small non-showy flowers in the center or interior of the flowerhead, and large, showy plants with large vibrant sepals (tepals). These showy bouquets are often extended in a engagement ring, or to the surface of the small flowers. Vegetation in untamed populations routinely have few to none of the showy blossoms, while cultivated hydrangeas have been determined and bred to have significantly more of the larger type bouquets.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blooms are large rounded flowerheads resembling pom-poms or, as the name means, the relative brain of the 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 viburnums and rhododendrons can appear, initially, much like those of some hydrangeas.Colors and soil acidityIn most varieties the flowers are white, but in some species (notably H. macrophylla), can be blue, red, pink, light purple, or dark purple. In these kinds the color is afflicted by the existence of aluminium ions which can be found or tangled up depending upon the land 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 produce flowers that are blue to purple typically, whereas an alkaline soil (pH above 7) will tie up aluminum ions and cause pink or red flowers.
This is caused by a color change of the blossom pigments in the occurrence of aluminium ions that can be adopted into hyperaccumulating vegetation.[6] Cutting down the pH of potting soils or mixes usually will not change the flower color to blue, because these soils have no aluminum ions. The ability to blue or green a hydrangea is affected by the cultivar also. Some plants are selected for 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 affected by aluminum and cannot be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
Hydrangeas – blooming in June Ramblin39; through Dave39;s Garden
Hydrangeas – blooming in June Ramblin39; through Dave39;s Garden
is from my first section of hydrangea shrubs planted 23 years ago
about Hydrangeas galore on Pinterest Hydrangeas, Climbing hydrangea
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