황새풀속 Eriophorum LINN.

1. 소수는 2개 이상이다.

2. 인편은 맥이 3개 또는 잔맥이 더 있다 ····························································································418. 작은황새폴

2. 인편은 밑의 1~2개 외에는 1맥이다.

3. 꽃줄기는 털이 없고 밋밋하며 포복경은 길게 뻗는다 ···········································································419. 참황새풀

3. 꽃줄기는 다소 거칠고 포복경은 짧다 ·····························································································420. 큰황새풀

1. 소수는 1개이다.

4. 포복경이 없고 뿌리에서 돋은 잎은 세모졌다.

5. 잎 가장자리가 거칠다 ··············································································································· 421. 황새풀

5. 잎 가장자리가 밋밋하다 ·············································································································· 설령황새풀

4. 포복경이 있으며 잎은 원통형이고 표면에 흠이 1개있다 ·············································································눈썹황새풀