Nature
16th Feb 2009Posted in: Nature 7
Sunflower

It’s Monday again!!! Shiiineee~~

Let’s start this brand new week with a smile :)

sunflower

The sunflower (Helianthus annuus) is an annual plant in the family Asteraceae and native to the Americas,with a large flowering head (inflorescence).

The stem can grow as high as 3 meters (9 3/4 ft), and the flower head can reach 30 cm (11.8 in) in diameter with the “large” seeds.

The term “sunflower” is also used to refer to all plants of the genus Helianthus, many of which are perennial plants.

Sunflowers in the bud stage exhibit heliotropism. At sunrise, the faces of most sunflowers are turned towards the east. Over the course of the day, they follow the sun from east to west, while at night they return to an eastward orientation. This motion is performed by motor cells in the pulvinus, a flexible segment of the stem just below the bud. As the bud stage ends, the stem stiffens and the blooming stage is reached.

by flyingbeagle


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7 Responses

  1. betchai says:

    a smile indeed, sunflowers always have that uplifting effect, bringing smiles. i wish i can see sunflowers bloom soon. love your photo.

  2. flyingbeagle says:

    Thanks betchai, have a bright and blessed week ahead! :)

  3. v1olet says:

    Pretty flower.
    Delicous seeds.

  4. BK says:

    Sunflower, it never failed to bring a smile on my face just looking at its brilliant colour. :)

  5. wow its greats pict bout sunflowers, in my country it make i snack they called kuaci

  6. iceah says:

    i love sunflowers c: it’s so bright c:

  7. grottogirl says:

    You gotta love a sunflower and this shot is fantastic. Love the vibrant yellow here!

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