Hydrangea sp.

Read about Hydrangea quercifolia – Oakleaf hydrangea

DSCF9156 400copy

DSCF9419 400copy

DSCF9147 400copy

DSCF9159 400copy

DSCF9150 400copy

DSCF9306 400copy

DSCF9412 400copy

DSCF9331 400copy

Hydrangea sp., common names hydrangea or hortensia, is a genus of 70–75 species of flowering plants native to southern and eastern Asia  [China, Japan, Korea, the Himalayas and Indonesia] and the Americas. By far the greatest species diversity is in eastern Asia, notably China, Japan, and Korea. Most are shrubs 1 to 3 meters tall, but some are small trees, and others lianas reaching up to 30 m [98 ft] by climbing up trees. They can be either deciduous or evergreen, though the widely cultivated temperate species are all deciduous.

In most species the flowers are white, but in some species [notably Hydragea macrophylla], can be blue, red, pink, light purple, or dark purple. In these species the color is affected by soil pH.

DSCF2236 400copy

^ Truck load of blue Hydragea flowers being sold at Gianyar market, Bali, Indonesia. [20150510]

For Hydrangea macrophylla and Hydrangea serrata cultivars, the flower color can be determined by the relative acidity of the soil: an acidic soil [pH below 7], by the influence of sundry agents in the soil, such as alum or iron, will usually produce flower color closer to blue, whereas an alkaline soil [pH above 7] will produce pinker flowers. This is caused by a color change of the flower pigments in the presence of aluminium ions which can be taken up into hyperaccumulating plants.

Photo: Gardens by the Bay,  Singapore [20150609]

Source: Wikipedia

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s