Content
- The composition of a sunflower
- Stem, leaves, blossom, root
- Structure of the blossom
- Flowers and leaves are directed towards the sun
- The "golden angle"
- Tips & Tricks
Especially the flower of the sunflower is special
The composition of a sunflower
Most gardeners do not think much about building a plant. He plays just for the prosperity of the sunflower belonging to the daisy family an important role. He ensures that the sunflower receives the optimal light and food conditions.
Stem, leaves, blossom, root
A sunflower is made up of the following parts:
The sunflower consists of a short to very long, hairy trunk depending on the size of the variety, grow on the ever-changing heart-shaped leaves.
The flower develops one or more flower heads, which have their own structure.
The root also plays a major role, because it ultimately determines that the sunflower can absorb enough food. The more the sunflower root can spread, the larger the stalk, leaves and flowers become.
Structure of the blossom
The sunflower blossom is something very special, because it is composed of different parts.
In the center of the flower basket are the small tubular flowers, which are usually brown, and from which later develop the nuclei.
The colored petals on the edge are ray florets. They give the sunflower its characteristic appearance. They are often yellow, but can also be red and orange, such as the sunflower "evening sun".
Flowers and leaves are directed towards the sun
The flowers and leaves follow the course of the sun on sunny days. This is referred to in the jargon as heliotropism.
The reason for the "rotation" is that the plant grows faster in the shaded areas than in the ones that receive direct sunlight. As a result, the flower heads and the leaves are always directed in the sun.
Only when the older flowers and leaves are too strong, they no longer turn with the sun.
The "golden angle"
The flower of the sunflower has another special feature. The brown tubular flowers are spiral-shaped. As a result, every little tube flower receives the optimal sunshine. Gardeners refer to this structure of sunflower blossom as a "golden angle".
Tips & Tricks
Even if the sunflower is non-toxic, only the seeds in the kitchen are used. The remaining parts of the plant absorb pollutants from the soil and are therefore not suitable for consumption.