개나리속 Forsythia VAHL

1. 잎에 털이 있다 ·························································································································· 102. 산개나리

1. 잎에 털이 없다.

2. 잎은 피침형이고 맹아의 잎은 3 개로 갈라진다 ·····················································································100. 개나리

2. 잎은 넓은난형이고 갈라지지 않는다

3. 잎은 윤채가 나고 잔가지 기부에 털이 없으며 줄기는 갈라져서 옆으로 퍼진다 ············································· 101. 만리화

3. 잎은 윤채가 나지 않고 잔가지 기부에 털이 밀생하며 줄기는 곧추자란다 ············································· 101+. 장수만리화