Hydrangea (/ha?'dre?nd?i?/;common labels hydrangea or hortensia) is a genus of 70-75 varieties of flowering plants local to southern and eastern Asia (China, Japan, Korea, the Himalayas, and Indonesia) and the Americas. Probably the greatest types diversity is eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters tall, but some are small trees, and more lianas achieving up to 30 m (98 feet) by climbing up trees. They could be either evergreen or deciduous, though the cultivated temperate varieties are deciduous extensively.Having been introduced to the Azores, H. macrophylla is now very common, on Faial particularly, which is known as the "blue island" due to the multitude of hydrangeas present on the island.Life cycleHydrangea plants are created from planting season to late fall months; they increase in flowerheads (corymbs or panicles) frequently at the ends of the stems.
Typically the flowerheads contain two types of blossoms: small non-showy bouquets in the guts or interior of the flowerhead, and large, showy blossoms with large brilliant sepals (tepals). These showy flowers tend to be extended in a diamond ring, or to the exterior of the tiny flowers. Crops in untamed populations have few to none of them of the showy bouquets typically, while cultivated hydrangeas have been determined and bred to have 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 bouquets are large spherical flowerheads resembling pom-poms or, as the name indicates, the comparative brain of any mop. On the other hand, lacecap flowers bear round, flat flowerheads with a center core of subdued, small blossoms surrounded by outer wedding rings of bigger blooms having showy tepals or sepals.
The flowers of some rhododendrons and viburnums can look, at first glance, just like those of some hydrangeas.Earth and colors acidityIn most varieties the plants 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 influenced by the occurrence of aluminium ions which are available or tangled up depending after the garden soil 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 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 caused by a color change of the rose pigments in the presence of aluminium ions which may be taken up into hyperaccumulating vegetation.[6] Bringing down the pH of potting soils or mixes usually will not change the rose color to blue, because these soils haven't any aluminum ions. The ability to blue or green a hydrangea is also inspired by the cultivar. Some plants are selected for his or her ability to be blued, while others are bred and selected to be red, white or pink. The flower color of all other Hydrangea species is not influenced by aluminum and cannot be changed or shifted. Hydrangeas likewise have a nickname called 'Change Rose'.
Hydrangeas! 11、插花、绿植 Pinterest
by eileengormley on Pinterest Ginger Jars, Blue Hydrangea and China
Hydrangea wedding bouquet: Hydrangeas Wedding, Hydrangeas Bouquets
Hydrangea Watercolor Painting. $35.00, via Etsy.
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