向日葵的花盘，杆，叶子和种子都有药用价值。
The face chunk , stem , leaf and seed of it have medicinal value .
一个常见的误解是向日葵盛开时花盘会跟着太阳转动。
A common misconception is that sunflower heads track the sun across the sky when in full bloom .
向日葵花盘