Hydrangea (/ha?'dre?nd?i?/;common labels 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. Undoubtedly the greatest species diversity is at eastern Asia, china notably, Japan, and Korea. Most are shrubs 1 to 3 meters high, however, many are small trees, and more lianas reaching up to 30 m (98 ft) by climbing up trees. They could be either evergreen or deciduous, though the cultivated temperate species are deciduous extensively.Having been introduced to the Azores, H. macrophylla is very common now, 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 produced from early spring to late fall months; they grow in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Typically the flowerheads contain two types of blossoms: small non-showy flowers in the guts or interior of the flowerhead, and large, showy bouquets with large vibrant sepals (tepals). These showy plants are often extended in a wedding ring, or to the exterior of the tiny flowers. Vegetation in crazy populations routinely have few to nothing of the showy plants, while cultivated hydrangeas have been bred and chosen to have more of the larger type blossoms.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead blossoms are large round flowerheads resembling pom-poms or, as the name implies, 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 plants of some viburnums and rhododendrons can look, initially, just like those of some hydrangeas.Land and colors acidityIn most types the plants are white, however in some species (notably H. macrophylla), can be blue, red, green, light purple, or dark crimson. In these types the color is damaged by the presence of lightweight aluminum ions which are available or tangled up depending after the ground pH. For H. h and macrophylla. serrata cultivars, the flower color can be dependant on 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 rose pigments in the occurrence of aluminium ions which can be taken up into hyperaccumulating plant life.[6] Cutting down the pH of potting soils or mixes usually does not change the rose color to blue, because these soils have no aluminum ions. The ability to blue or green a hydrangea is also inspired by the cultivar. Some plants are selected for their ability to be blued, while some are bred and selected to be red, pink or white. 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'.
Hydrangea Petiolaris / cataratoare – 130 lei Paradisul verde de
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