털이슬속 Circaea LINN.

1. 열매는 2실，2종자이며 꽃잎은 꽃받침보다 짧다.

2. 줄기는 녹색이고 퍼진 털이 있다. 잎은 난상 심장형이다 ·····································································1280. 쇠털이슬

2. 줄기는 때로 붉은빛이 돌고 털이 없거나 짧다. 잎은 예저이다.

3. 줄기에 꼬부리진 털이 있다. 잎은 원저이며 화서축에 털이 없거나 산모가 있다 ··········································1281. 털이슬

3. 털이 없거나 잔털이 약간 있다. 잎은 아심장저이며 화서축에 선모가 밀생한다   ·······································1282. 말털이슬

1. 열매는 1 실， 1 종자이다 ············································································································1283. 쥐털이슬