옻나무과 Anacardiaceae

1. 꽃에 꽃잎이 없다. 잎은 주로 3 출엽이며 때로는 우상엽이다 ···································································· 1058. 부자나무

1. 꽃에 꽃잎이 있다.

2. 단엽으로 열매꼭지에 털이 있다 ·································································································· 1059. 자연나무

2. 잎은 홀수 우상복엽 또는 3출엽이며 열매 꼭지에 털이 없다 ·········································································· 옻나무속

옻나무속 Rhus L.

1. 줄기는 곧추 자란다.

2. 소엽은 가장자리 전체에 톱니가 드문드문 있다 ···································································· 1061. 붉나무(오배자나무)

2. 소엽은 밋밋하거나 2-3 개의 톱니가 있다.

3. 소엽과 과피에 털이 없다 ····································································································· 1062. 검양옻나무

3. 소엽은 적어도 뒷면에 털이 있다.

4. 소엽에는 흔히 2-3 개의 톱니가 있고 과피에 가시털이 있다 ···························································· 1063. 개옻나무

4. 소엽의 가장자리는 밋밋하고 과피에 털이 없다.

5. 소엽은 길이 7-12 cm，너비 2-4 cm이며 측맥은 간격이 5mm 이하이다 ····································· 1064. 산검양옻나무

5. 소엽은 길이 16 cm，너비 7cm 이며 측맥은 간격이 5mm 이상이다 ··················································· 1065. 옻나무

1. 줄기는 덩굴성이다 ·················································································································· 1060. 덩굴옻나무