병꽃나무속 Weigela THUNB.

1. 꽃받침은 중부까지 붙어있고 종자에 날개가 없다.

2. 잎은 표면에 털이 없고 뒷면 맥 상 또는 주맥 상에 털이 밀생한다 ······················································· 458. 붉은병꽃나무

2. 잎은 양면에 털이 있다.

3. 잎에 선털이 없다 ············································································································ 459. 소영도리나무

3. 잎에 선털이 있다 ············································································································ 460. 통영병꽃나무

1. 꽃받침은 밑까지 갈라진다.

4. 꽃은 황록색 또는 백색이다.

5. 잎에 털이 많고 잎자루는 거의 없다 ·····························································································461. 병꽃나무

5. 잎에 털이 적고 잎자루는 길이 5-8mm 이다··············································································· 462+ +. 축자병꽃

4. 꽃은 황록색 또는 백색이다.

6. 잎은 털이 거의 없고 윤채가 나며 꽃부리 통부는 갑자기 넓어진다·················································  462+. 일본병꽃나무

6. 잎은 뒷면에 흰털이 밀생하고 꽃부리 통부는 점차 굵어진다··································································· 462. 골병꽃