바늘꽃속 Epilobium LINN.

1. 잎은 호생한다 ·······················································································································1284. 분홍바늘꽃

1. 잎은 대생한다.

2. 암술머 리는 4 개로 갈라진다   ····································································································1285. 큰바늘꽃

2. 암술머리는 갈라지지 않는다.

3 잎에 톱니가 없다.

4. 줄기에 능선이 있고 씨방에 털이 없다 ····················································································1287. 장진바늘꽃

4. 줄기에 능선이 없고 씨방에 털이 있다.

5. 땅속에 포복지가 있다. 꽃잎은 길이 5-9mm 이다  ····································································1286. 버들바늘꽃

5. 땅속에 짧은 포복지가 자랄 때도 있으며 꽃잎은 길이 3.5-4.5mm 이다   ··········································1288. 회령바늘꽃

3. 잎에 톱니가 있으며， 톱니가 뚜렷하지 않을 때에는 포복지가 없다.

6. 암술머리는 둥글고 잎은 양끝이 좁다.

7. 씨방에 털이 거의 없다. 종자는 검고 털은 희다    ·····································································1289. 두메바늘꽃

7. 씨방에 털이 있다.

8. 줄기에는 능선에 굽은 털이 있고 씨방에 선모가 있다     ·····························································1290. 호바늘꽃

8. 줄기에 굽은 털이 있거나 또는 없고 씨방에 선모가 없다   ···························································1291. 돌바늘꽃

6. 암술머리는 방망이처럼 길다.

9. 포복지가 있다. 씨방에 선모가 있고 종모는 적갈색이다   ··································································1292. 바늘꽃

9. 포복지가 없다. 지상부에 새싹이 돋는다. 능선이 있고 씨방에는 굽은 털과 선모가 있으며 종모는 희다   ········1293. 줄바늘꽃