1. Morphology: Sunflower is an erect herb with a height of1-3m and large and bright flowers; Portulaca oleracea is a herbaceous or shrubby plant, the height is generally less than 1 m, the flowers are small, and the color is mostly white or yellowish.
2. Species: There are many kinds of sunflowers, which can be divided into multi-petal sunflowers and single-petal sunflowers according to different flower patterns; There are many kinds of purslane, such as red purslane, white purslane and golden purslane.
3. Growing environment: Sunflowers have strong adaptability and can grow in relatively arid and barren soil; Portulaca oleracea has weak adaptability, likes to grow in fertile soil, and has high requirements for water.
4. Nutritional value: Sunflower is rich in nutrients such as protein, potassium and magnesium, and can be made into food such as melon seeds; Portulaca oleracea is rich in vitamin C, vitamin A, calcium, iron and other nutrients, and is regarded as a vegetable with health care function.
Generally speaking, sunflower and purslane are different in shape, species, growth environment and nutritional value, but they are both common plants with different uses and values.