질경이과 Plantaginaceae

1. 1 ~2년초로서 꽃부리는 벌어지지 않고 수술은 밖으로 나오지 않으며 식물체에 털이 많다  ··································· 미국질경이

1. 다년초로서 꽃부리는 벌어지고 수술은 노출된다.

2. 잎은 피침형이며 곧추서고 종자는 2 개씩이며 복면에 흠이 있다   ··························································· 397. 창질경이

2. 잎은 장타원형 또는 넓은 난형이며 종자에 흠이 없다.

3. 잎에 털이 거의 없다.

4. 종자는 6~8 개씩 들어있다 ······································································································· 393. 질경이

4. 종자는 8-12 개씩 들어있다     ································································································ 394. 왕질경이

3. 잎에 털이 있다.

5. 잎에 흰 털이 있고 가장자리는 물결형이며 종자는 4 개씩 들어있다   ···················································· 395. 개질경이

5. 잎에 잔털이 있고 가장자리에 치아상 톱니가 있으며 종자는 3-4 개씩 들어있다  ·······································396. 털질경이