Hydrangea (/ha?'dre?nd?i?/;common names hydrangea or hortensia) is a genus of 70-75 species of flowering plant life local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Certainly the greatest kinds diversity is at eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters tall, however, many are small trees, and more lianas getting up to 30 m (98 feet) by climbing up trees. They could be either deciduous or evergreen, although cultivated temperate species are deciduous generally.Having been introduced to the Azores, H. macrophylla is very common now, particularly on Faial, which is recognized as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea blossoms are produced from planting season to late fall months; they grow in flowerheads (corymbs or panicles) most often at the ends of the stems.
Usually the flowerheads contain two types of blossoms: small non-showy plants in the center or interior of the flowerhead, and large, showy flowers with large bright colored sepals (tepals). These showy plants are lengthened in a ring often, or to the exterior of the tiny flowers. Plants in untamed populations routinely have few to none of them of the showy bouquets, while cultivated hydrangeas have been preferred 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 blooms are large circular 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 blossoms ornamented by outer bands of much larger bouquets having showy tepals or sepals.
The flowers of some viburnums and rhododendrons can show up, initially, much like those of some hydrangeas.Colors and ground acidityIn most kinds the blooms are white, but in some kinds (notably H. macrophylla), can be blue, red, red, light purple, or dark purple. In these species the color is influenced by the existence of metal ions which are available or tied up depending upon the soil 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 supply 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 caused by a color change of the bloom pigments in the existence of aluminium ions that can be taken up into hyperaccumulating plant life.[6] Decreasing the pH of potting soils or mixes usually will not change the bloom 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 because of their ability to be blued, while others are bred and selected to be red, pink or white. 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'.
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Hydrangea amongst invasive ground cover My Flowers Oklahoma amp; Texa
Tulsa Gentleman: Macro Monday Oakleaf Hydrangea
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