선갈퀴속 Asperula LINN.

1. 잎은 6-10 개씩 윤생한다 ················································································································ 430. 선갈퀴

1. 잎은 4-6 개씩 윤생한다.

2. 꽃과 열매에 털이 없다 ················································································································· 431. 개갈퀴

2. 꽃과 열때에 털이 있다 ············································································································ 432. 갈퀴아재비