장미속 Rosa LINN.

1. 암술대는 윗부분이 합쳐지고 꽃받침통 밖으로 나왔다.

2. 줄기는 비스듬히 선다.

3. 상록성이며 꽃은 지름이 5cm 이상이다.

4. 가시는 편평하다   ·························································································································장미

4. 가시의 단면은 3 각형이다  ···································································································· 794. 월계화

3. 낙엽성 또는 반상록성이며 꽃은 지름이 3cm 이하이다.

5. 턱잎에 톱니가 있고 잎은 뒷면에 털이 다소 있으며 꽃은 지름이 2cm 정도이다 ············································783. 찔레

5. 꽃은 만첩이고 지름이 3cm 정도이며 잎은 다소 넓다  ···································································· 784. 덩굴장미

2. 줄기는 옆으로 벋어간다.

6. 꽃은 산방상으로 배열한다.

7. 줄기에 가시와 선모가 있다  ·······························································································785. 용가시나무

7. 줄기에 선모가 없다 ······································································································785+. 흑산가시나무

6. 꽃은 1~5개씩 달리며 줄기에 선모가 없고 가시만 있다. 소엽은 넓은 난형이며 암술대에 털이 있다  ············· 786. 돌가시나무

1. 암술대는 서로 떨어지고 밖으로 길게 나오지 못한다. 열매에 꽃받침이 남아 있다.

8. 소엽은 보통 7매 이상이고 길이가 2cm 이하이며 꽃은 황색 또는 백색이다.

9. 꽃은 황색이다 ··················································································································· 787. 노랑해당화

9. 꽃은 희다.

10. 소화경과 잎자루에 선모가 있고 잎에 선상의 톱니가 있으며 열매는 길다 ··········································· 788. 흰인가목

10. 선모가 없고 잎에는 톱니가 있으며 열매는 둥글다 ·····································································789. 둥근인가목

8. 소엽은 7매 이하이고 길이가 2cm 이상이며 꽃은 적색 또는 연한홍색이다

11. 잎은 뒷면에 선점이 있고 가지는 드문드문 갈라지며 열매는 둥글다 ··················································790. 생열귀나무

11. 잎은 선점이 없다.

12. 가시에 털이 있고 잎에 주름이 많다 ··························································································791. 해당화

12. 가시에 털이 없고 잎에 주름이 없다.

13. 소화경에 선모가 밀생하고 턱잎 가장자리에 털이 있으며 열매는 타원형이다 ······································ 792. 인가목

13. 소화경과 턱잎에 털이 없고 열매는 둥글다 ···········································································793. 붉은인가목