Sunflower pictures (introduction to morphological characteristics and maintenance methods)

1. Morphological characteristics

1. Roots: Roots are divided into main roots, lateral roots and fibrous roots. The taproot is relatively deep and grows vertically into the ground. Lateral roots will also grow on it and grow horizontally. Fibrous roots will also grow on the lateral roots.

2. Stem: The stem is upright, with a rough surface and bristles. In the later stage, it will become woody and hollow inside. The color of the embryonic stem in the seedling stage can distinguish its variety.

3. Leaves: Leaves are divided into cotyledons and true leaves. There is only one pair of cotyledons, while there are more true leaves, which are opposite or alternate, and have bristles on the surface.

4. Flowers: There is a disk at the top of the sunflower stem, with two kinds of flowers on it. The flowers growing in a circle around the outside of the disk are ligulate flowers, and the flowers growing inside the disk are tubular flowers. The color is mostly yellow.

5. Fruit: The seeds are long, with a shell with black and white stripes on the outside. The cotyledons inside are edible, commonly known as melon seeds.

2. Maintenance methods

1. Temperature: Sunflowers do not have high temperature requirements and can grow healthily as long as the temperature is above 10℃.

2. Water: Sunflowers do not require much water during their growth period. But once the bud stage begins, more watering is needed. Less water will reduce the number of seeds.

3. Light: Sunflower is commonly known as sunflower, and it naturally cannot do without light at all stages of its growth. Adequate sunlight can ensure that it grows healthily, has vigorous stems and leaves, and that the seeds are full and plump.

3. Picture appreciation