1、 Sunflower

1. Root

Its roots can enter deep soil, up to 100-200 cm deep. Its lateral roots grow horizontally, with many fibrous roots and root hairs. Its root system is relatively developed and widely distributed in the soil. Its root grows even faster than the stem, especially when the flower disc is formed. When the seed is mature, the root will not grow and wither

2. Stem

Its stem is upright, with bristles on the surface, which is relatively rough. In the later stage, the stem will be lignified and the interior will be empty. Its embryo stem has different colors, which is a very important way to identify its varieties. The height difference of stems of different varieties is relatively large. Even the same variety has different height due to various environmental reasons

3. Leaf flower

Its cotyledons are two. The true leaves are in pairs and grow in the area of 1-3 nodes below the stem. The true leaves can grow relatively large and have bristles on the leaves. The flower grows at the top of the stem. Its color and size are related to the variety. Its color can attract insects to pollinate. Its fruit is melon seeds, edible, long seeds, generally black and white stripes, and thick peel

2、 Chrysanthemum

It likes sunshine and doesn't like darkness. It can endure drought and doesn't like waterlogging. It can endure the severe cold. Even in winter, its roots can spend the cold winter underground. It can withstand slight frost, but the growth period of seedlings requires relatively high temperature. The best temperature is 20 ℃, the hottest is no more than 32 ℃, and the lowest is no less than 10 ℃. It likes thicker soil with more humus and better water permeability. It can grow in slightly acidic to neutral soil, and the best pH is in the range of 6.2-6.7

3、 Distinction

Although the two are yellow, the difference is very obvious. The flowers of chrysanthemum grow thinner and longer, while the flowers of the former are thicker and larger. Chrysanthemum flowers are constantly spreading out. The former has petals only on the edge of the disc. Moreover, it is difficult for us to see the stamens of the latter. The stamens of the former can not only be seen clearly, but also the melon seeds on it. The leaves of the latter are small and serrated, while the leaves of the former are wide and have small teeth on the edge