물푸레나무속 Fraximus LINN.

1. 꽃차례는 잎이 달린 가지에 정생한다.

2. 잎 뒷면 맥액 근처에 갈색 털이 밀생한다 ························································································79.물푸레나무

2. 잎 뒷면에 잔털이 있다.

3. 소엽은 5~9 개이다  ················································································································80. 쇠물푸레

3. 소엽은 7~9 개이다 ············································································································81. 백운쇠물푸레

1. 꽃차례는 잎이 없는 가지에 액생한다.

4. 열매에 꽃받침이 붙어 있고 소엽은 5~7 매이다.

5. 날개는 열매에 정생하며 거의 흐르지 않고 잔가지와 잎애 털이 없으며 소엽병이 있다 ································82. 미국물푸레

5. 날개는 열매 끝에서 흐르고 잔가지와 잎에 털이 있거나 없다 ······························································84. 붉은물푸레

4. 소엽은 4~5쌍이고 꽃은 꽃받침이 없다.

6. 엽축과 소엽 밑에 적갈색 털이 밀생한다 ·························································································78. 들메나무

6. 소엽에 뚜렷한 털이 없다 ·········································································································83. 구주물푸레