The similar plant of Brazilian iron is yemen iron. The two are very similar, but if you put them together, you can still find the difference. Brazilian iron works are relatively tall, can grow to 6 meters, and have long, narrow, oval leaves. When it blooms, it is light yellow in color and has a fragrant smell. And yemen iron is about two meters tall. Compared with the former, the leaves are wider and strip-shaped. It is a yellow-green umbel when flowering, and the flowering period is June-August.