갈퀴속 Galium LINN.

1. 잎 가장자리에 밑으로 향한 잔가시가 있다.

2. 2년초로서 잎은 도피침형이며 끝이 바늘같이 뾰족하고 6-8개가 윤생하며 열매에 가시 같은 털이 있다   ··············413. 갈퀴덩굴

2. 다년초로서 잎은 끝이 바늘처럼 뾰족하지 않고 열매에 가시 같은 털이 없다.

3. 잎은 6 장이며 원두이다.

4. 잎은 좁은 장타원형이며 끝이 둥글거나 약간 파졌다. 과병은 4-5mm 이다  ···············································415. 흰갈퀴

4 잎 끝이 둥글다가 갑자기 뾰족해진다 ··························································································414. 큰잎갈퀴

3. 잎은 4 개(5 개)가 윤생하고 과병은 길이 6~10mm 이다  ·······························································416. 가는네잎갈퀴

1. 잎 가장자리에 필을 향한 가시가 없다.

5. 잎은 6-10 개가 윤생한다.

6 잎은 선형이며 6~10 개씩 윤생하고 줍기에 밑을 향한 가시가 없다.

7. 높이 70-100cm 이고 잎은 길이 2~3cm 이며 털이 있고 8~10 개씩 윤생한다   ···········································417. 솔나물

7. 높이 10-20 cm이고 잎은 길이 6-8mm이며 털이 없고 6개 또는 4개씩 윤생한다  ····································418. 애기솔나물

6. 줄기에 밑을 향한 가시가 있고 잎은 6 개씩 윤생한다.

8. 잎은 좁은 장타원형이며 끝이 둥글고 작은 돌기가 있으며 건조해도 검게 되지 않는다   ······························419. 개선갈퀴

8. 잎은 난상 피침형이며 마르면 검게 된다··················································································420. 검은개선갈퀴

5. 잎은 4 개 때로는 5 개씩 윤생한다.

9. 엽맥이 뚜렷하다.

10. 잎은 넓은 타원형이며 열매에 갈고리 같은 가시가 있다 ································································ 421. 털둥근갈퀴

10. 잎은 난상 피침형 또는 난형이고 다소 두꺼우며 열매에는 짧은 털이 있거나 없다.

11. 줄기에 털이 있고 잎은 둔두이다 ···························································································422. 긴잎갈퀴

11. 줄기에 털이 없고 잎은 예첨두이며 열매에 털이 없다 ·································································· 423. 민둥갈퀴

9. 잎에는 주맥만이 뚜렷하다.

12. 잎은 난형이며 잎자루가 길고 줄기 밑에는 잎이 2개씩 달리며 열매에 가시 같은 털이 있다  ························ 424. 두메갈퀴

12. 잎은 도란형 또는 좁은 타원형이고 줄기 밑에서는 잎이 4개씩 달린다.

13. 잎은 주맥 뒷면과 가장자리에 긴 털이 있다.

14. 과병은 길이 5~10mm이고 꽃부리곁에 털이 있으며 윤생엽의 길이가 같지 않고 열매에 혹 같은 돌기가 있다 ·············· 425. 산갈퀴

14. 과병은 길이 1~3mm이고 윤생엽은 길이가 같다.

15. 잎은 너비 3-6mm 이고 길이 10 - 15 mm 정도이며 열매에 가시털이 있다 ··································· 426. 네잎갈퀴

15. 잎은너비 1.5-2.5mm, 길이 6~12mm이고 열매에 비늘 같은 털이 있다 ····································· 428. 좀네잎갈퀴

13. 잎에 털이 없고 가장자리에 가시털이 있다.

16. 잎은 피침형 또는 도피침형이며 열매에 가시털이 있다 ··························································· 429. 참갈퀴덩굴

16. 잎은 선형이며 열매에 털이 없다 ···························································································427. 실갈퀴