갈매나무과 Rharnnaceae

1. 턱잎이 가시로 되었다.

2. 열매는 육질의 핵과이다    ············································································································1118. 묏대추

2. 열매는 건과이며 날개가 있다  ········································································································1119. 갯대추

1. 턱잎이 가시로 되지 않았다.

3. 잎은 3출맥이며 열매꼭지는 육질이다   ···························································································1120.헛개나무

3. 잎은 우상맥이며 열매꼭지는 육질이 아니다.

4. 잎은 길이 3cm 이하가 보통이고 거의 대생하며 꽃은 거의 소화경이 없고 가지끝이 가시로 되어있다 ··············· 1121. 상동나무

4. 잎은 갈매나무속의 몇 종을 제외하고는 길이가 4cm 이상이며 대생 또는 호생하고 꽃에 소화경이 있다. 가지에 가시가 있는 것이 있다.

5. 열매는 긴 핵과이며 가지에 가시가 없다.

6. 잎에 톱니가 있다 ········································································································· 1122. 까마귀베개

6. 잎에톱니가없다  ·················································································································· 망개나무속

5. 열매는 거의 둥글고 종자는 3 개씩 들어있다. 가지에 흔히 가시가 있다 ···················································· 갈매나무속