레나무Fraximus LINN.

1. 꽃차는 잎달린 정생.

2. 뒷면 색 털밀생한다 ························································································79.물푸레나무

2. 잎 뒷면잔털있다.

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

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

1. 꽃차례는 잎에 액생한다.

4. 열에 꽃받이 붙어 있고 엽은 5~7 이다.

5. 날개는 열매에 정생하며 거의 흐르지 않고 잔가지와 잎없으소엽병있다 ································82. 미국물푸레

5. 날개는 열매 끝에서 르고 잔가와 잎에 털이 있거나 없다 ······························································84. 붉은물푸레

4. 소엽은 4~5쌍고 꽃꽃받침이 없다.

6. 소엽 밑에 적갈색 털밀생한다 ·························································································78. 들메나무

6. 엽에 뚜렷한 이 없다 ·········································································································83. 구주물푸레