측백나무과 Cupressaceae

1. 구과는 목질이고 비늘 같은 잎은 교호 대생하며 잎이 달린 가지는 앞뒤의 구별이 있다.

2. 실편은 다소 편평하며 복와상으로 배열한다.

3. 구과는 난원형이며 비늘잎은 뒷면의 기공군이 희미하다···········································································측백나무속

3. 구과는 다소 구형이며 실편은 두껍고 잎이 달린 가지는 편평하고 뒷면의 기공조선은 희다   ······························264. 나한백

2. 실편은 방패형이며 가지 뒷면에 기공조선이 있다 ··························································································편백속

1. 구과는 장과같이 생기고 성숙하여도 벌어지지 않으며 잎이 달린 가지에 위아래의 차가 없다 ······································ 향나무속