사철나무속 Euonymus LINN.

1. 상록수이다.

2. 곧추 지란다.

3. 줄기의 횡단면은 동글다 ·········································································································1072.사철나무

3. 줄기의 단면은 4각형이다 ·········································································································1073. 섬회나무

2. 옆으로 자란다······················································································································1074. 줄사철나무

1. 낙엽수이다.

4. 가지에 코르크질 날개나 사마귀 감은 돌기가 있다.

5. 가지에 날개 또는 능선이 있다     ······························································································1075. 화살나무

5. 가지에 사마귀 같은 돌기가 있고 소화경은 실같이 가늘다  ·································································1076. 회목나무

4. 가지는 평활하다.

6. 겨울눈은 길게 뾰족하다.

7. 꽃은 5 수이고 열매는 5 개로 갈라진다.

8. 열매에 날개가 없고 잎은 중앙 또는 그 밑이 가장 넓으며 꽃은 담녹색이다  ········································1077. 참회나무

8. 열매에 날개가 있고 꽃은 자갈색이다  ·······················································································1078. 회나무

7. 꽃은 4 수이고 열매는 4 개로 갈라지며 날개가 넓고 잎은 중앙 이상이 가장 넓다  ·································1079. 나래회나무

6. 겨울눈은 짧고 둥글며 열매는 4 개로 갈라진다.

9. 열매는 날개가 넓고 잎은 장타원형 또는 난형이다  ······································································1080. 버들회나무

9. 열매는 날개가 없다.

10. 꽃은 연한녹색이고 꽃밥은 황색이다    ·················································································1081. 참빗살나무

10. 꽃은 황백색이고 꽃밥은 자주색이다.

11. 잎자루는 길이 5~10mm이고 잎은 장타원형이다    ·······················································1082. 좁은잎참빗살나무

11. 잎자루는 길이 8~25mm이다.

12. 잎은 넓은 타원형이다    ··························································································1083. 좀참빗살나무

12. 잎은 난상 원형 또는 넓은 타원형이다   ································································ 1083+. 둥근잎잠빗살나무