4. 가래 나무목 Juglandales

가래나무과 Juglandaceae

1. 열매는 날개가 있다.

2. 열매는 구과이고 잔가지의 골 속은 차 있다   ······················································································53. 굴피나무

2. 열매는 총상으로 달리며 날개가 있고 잔가지의 골 속은 계단상이다 ······················································54. 중국굴피나무

1. 열매는 날개가 없는 핵과이다.

3. 골 속은 계단상이며 내과피는 능각과 주름살이 진다  ··············································································· 가래나무속

3. 골 속은 차 있고 내과피는 밋밋하다 ····································································································히코리나무

가래나무속 Juglans, LINN

1. 소엽은 7 개 이상이고 토가 있으며 자화수에 꽃이 많고 열매는 2 실이다  ························································55. 가래나무

1. 소엽은 7개 이하이고 가장자리가 거의 밋밋하며 암꽃은 1~3개씩 달리고 열매는 4실이다 ·····································56. 호두나무