Hydrangea (/ha?'dre?nd?i?/;common titles 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 species diversity is eastern Asia, china notably, Japan, and Korea. Most are shrubs 1 to 3 meters extra tall, but some are small trees and shrubs, and more lianas reaching up to 30 m (98 foot) by climbing up trees and shrubs. They could be either deciduous or evergreen, though the generally cultivated temperate varieties are deciduous.Having been introduced to the Azores, H. macrophylla is very common now, particularly on Faial, which is known as the "blue island" because of the multitude of hydrangeas present on the island.Life cycleHydrangea blossoms are produced from planting season to late fall; they increase 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 guts or interior of the flowerhead, and large, showy blooms with large colourful sepals (tepals). These showy flowers are long in a band often, or to the surface of the tiny flowers. Crops in crazy populations typically have few to nothing of the showy bouquets, while cultivated hydrangeas have been bred and decided on 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 plants are large rounded flowerheads resembling pom-poms or, as the name indicates, the relative head 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 bouquets of some viburnums and rhododendrons can look, initially, a lot like those of some hydrangeas.Ground and colors acidityIn most kinds the blooms are white, but in some varieties (notably H. macrophylla), can be blue, red, green, light purple, or dark purple. In these varieties the color is affected by the presence of light weight aluminum ions which can be found or tangled up depending after the earth 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 bring about pink or red flowers.
This is the effect of a color change of the flower pigments in the occurrence of aluminium ions which may be adopted into hyperaccumulating crops.[6] Bringing down the pH of potting soils or mixes usually does not change the flower color to blue, because these soils have no aluminum ions. The capability to blue or pink 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, pink or white. The flower color of most other Hydrangea species is not damaged by aluminum and cannot be changed or shifted. Hydrangeas also have a nickname called 'Change Rose'.
Tidak ada komentar:
Posting Komentar