배나무속 Pyrus LINN.

1. 열매에 꽃받침이 달려있다.

2. 잎의 톱니는 바늘처럼 길고 뾰족하다.

3. 잔가지와 잎자루에 털이 없다  ································································································· 838. 산돌배

3. 잔가지와 잎자루에 갈색 털이 있다 ······················································································· 840. 백운배나무

2. 톱니는 뾰족하지만 바늘같지 않다.···································································································839. 참배

1. 열매에 꽃받침이 없다.

4. 톱니는 날카롭고 열매는 양끝이 들어간다  ·················································································· 841. 돌배나무

4. 톱니는 날카롭지 않다.

5. 톱니는 둔한 물결형이고 열매는 양끝이 오목하다  ········································································ 842. 콩배나무

5. 잎에는 가늘고 뾰족한 톱니가 있다.

6. 열매는 흑갈색이다.

7. 잎은 넓은 예저이며 열매꼭지는 길이 3~5 cm 이고 열매는 둥글다 ············································ 843. 위봉배나무

7. 잎은 원저이며 열매꼭지는 보다 짧고 열매는 도란형이다 ·····················································843+. 개위봉배나무

6. 열매는 녹갈색이며 열매꼭지는 길이 2.5-3.2 cm 이고 잎은 난원형 또는 난형이다 ··························843++. 청위봉배나무