Hydrangea Pics: Dataja:Hydrangea petiolaris RJB.jpg Wikipedija

Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 varieties of flowering vegetation indigenous to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Undoubtedly the greatest varieties diversity is eastern Asia, notably China, Japan, and Korea. The majority are shrubs 1 to 3 meters tall, but some are small trees, while others lianas getting up to 30 m (98 feet) by climbing up trees and shrubs. They can be either evergreen or deciduous, though the cultivated temperate varieties are all deciduous extensively.Having been introduced to the Azores, H. macrophylla is very common now, on Faial particularly, which is known as the "blue island" due to the vast number of hydrangeas present on the island.Life cycleHydrangea flowers are produced from planting season to late fall months; they increase in flowerheads (corymbs or panicles) frequently at the ends of the stems.

Usually the flowerheads contain two types of bouquets: small non-showy blossoms in the guts or interior of the flowerhead, and large, showy blooms with large colorful sepals (tepals). These showy flowers are expanded in a ring often, or to the surface of the tiny flowers. Plant life in crazy populations have few to none of them of the showy bouquets typically, while cultivated hydrangeas have been bred and chosen to have significantly more of the bigger type plants.There are two flower arrangements in hydrangeas with Corymb style inflorescens, which include the commonly grown "bigleaf hydrangea"--Hydrangea macrophylla. Mophead plants are large round flowerheads resembling pom-poms or, as the name means, the relative head of an mop. In contrast, 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 seem, at first glance, very much like those of some hydrangeas.Colors and ground acidityIn most species the bouquets are white, but in some types (notably H. macrophylla), can be blue, red, red, light crimson, or dark crimson. In these varieties the colour is afflicted by the occurrence of metal ions which can be found or tied up depending upon the dirt 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 lead to pink or red flowers.

This is the effect of a color change of the bloom pigments in the presence of aluminium ions which may be taken up into hyperaccumulating plants.[6] Minimizing the pH of potting soils or mixes usually does not change the bloom color to blue, because these soils haven't any aluminum ions. The ability to blue or pink 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 all other Hydrangea species is not damaged by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.