3) 금불초족 Inuleae

1. 암꽃 꽃부리는 통형 또는 선형이고 두상화는 반상이며 1, 2가화이고 암술머리는 꽃부리보다 길다.

2. 화서탁에 탁편이 있고 관모는 없다   ··································································································· 개중대가리

2. 화서탁에 탁편이 없고 털이 있는 관모가 있다.

3. 양성화는 결실하지 않으며 양성화의 암술머리는 갈라지지 않거나 얇게 갈라진다.

4. 관모는 기부가 붙어서 술잔 같이 되고 두상화서는 산방상으로 배열하거나 간흑 1개씩 달린다.

5. 2가화로서 두상화서는 산방상으로 배열한다 ············································································577. 백두산떡쑥

5. 1가화 또는 2가화로서 두상화서는 단성 또는 암꽃과 양성화가 있으며 후자는 결실하지 못한다 ························· 솜다리속

4. 관모는 기부가 떨어져 있다  ········································································································ 다북떡쑥속

3. 양성화는 대부분 결실하며 암술대는 갈라지고 관모는 기부가 떨어지거나 붙어있다.

6. 두상화서에 암꽃과 양성화가 있으며 총포편은 황색, 갈색 또는 무색이다 ··························································떡쑥속

6. 두상화서에는 양성화뿐이거나 바깥쪽에 약간의 암꽃이 있으며 총포편은 희거나 꽃잎 같은 부속체가 있다  ··········· 589. 밀짚꽃

1. 암꽃 꽃부리는 설상 또는 통상이고 두상화서는 복사상 또는 반상이며 2 가화이고 총포편은 초질또는 혁질이며 때로 잎같이 생겼다.

7. 관모가 있다 ································································································································  · 금불초속

7. 관모가 없고 선이 있으며 양성화와 암꽃은 모두 결실한다   ············································································ 담배풀속