끈끈이대나무속 Silene LINN.

1. 1~2년초로서 마디사이에 점액이 있다.

2. 잎은 난형 내지 넓은 피침형이며 꽃은 홍색， 백색으로 산방상으로 배열한다   ········································343. 끈끈이대나물

2. 잎은 피침형 내지 선형이고 꽃은 흰색으로 원추상으로 배열한다    ······················································346. 끈끈이장구채

1. 다년초이다.

3. 잎은 총생한다.

4. 밑부분의 잎은 자줏빛이 도는 새순의 잎과 더불어 총생한다     ···························································344. 한라장구채

4. 잎겨드랑이에 잎이 달린 짧은 가지가 있다   ·················································································347. 층층장구채

3. 잎은 총생하지 않는다.

5. 가지에 밑을 향한 털이 있으며 과병은 길이 7mm 이다   ································································349. 오랑캐장구채

5. 밑을 향한 털이 없다.

6. 밑에서 나온 잎은 길며 총생하고 꽃은 황색이다 ·····································································345. 가는다리장구채

6. 꽃은 희고 잎은 총생하지 않는다.

7. 잎은 너비 6mm 이하이고 줄기에 달린 잎의 1-3쌍은 다소 합생한다 ···················································348. 흰장구채

7. 잎은 너비 7~10 mm로서 가장자리에 작은 돌기가 있다 ·······························································350. 울릉장구채