This is a perennial herb which varies in general appearance.

It is a slender perennial herb 15 to 40cm tall.

This species is a perennial herb growing up to 1.5 meters tall.

This is a perennial herb growing up to half a meter tall.

This species is a small perennial herb with stems just a few inches long.

This way it was found that some perennial herbs live up to 50 years and more.

This is a perennial herb producing a red stem 6-12 in.

But scientists in China have discovered a novel one, used by a perennial herb.

This is a perennial herb growing low against the ground or drooping.

It is a perennial herb that grows in the late spring.