앵두(양두)나무아과 Pruoideae

1. 암술대는 씨방 옆에 달리고 밑씨는 위로 향한다 ···················································································795. 빈추나무

1. 암술대는 씨방 위에 달리고 밑씨는 위에서 밑으로 처진다 ············································································ 벚나무속

벚나무속 Prunus LINN.

1. 열매는 한쪽이 다소 파져 있고 흰 가루로 덮이거나 털이 있다.

2. 겨드랑이눈은 1 개씩이고 끝눈이 없다.

3. 씨방과 열매에 털이 없고 꽃에는 대가 있다 ··················································································· 796. 자두나무

3. 씨방과 열매에 털이 있고 꽃에는 거의 대가 없다.

4. 종자는 과육과 떨어지지 않고 겉에 작은 구멍이 많으며 잎은 톱니가 거의 비슷하다 ································ 797. 매실나무

4. 종자는 과육에서 잘 떨어지고 겉이 울룩불룩하다.

5. 잎은 톱니가 불규칙한 겹톱니이고 수피에 코르크가 발달한다 ··························································· 798. 개살구

5. 잎은 홀톱니이다.

6. 잎은 난상원형이며 잔톱니가 있고 종자는 옆에 날개 같은 돌기가 있다 ································ 799. 시베리아살구나무

6. 잎은 넓은 타원형, 넓은 난형 등이며 크고 작은 톱니가 불규칙하고 종자에 날개가 없다····························· 800. 살구

2. 겨드랑이눈은 3개씩이고 끝눈이 있다.

7. 잎끝은 갈라지지 않는다.

8. 꽃받침에 털이 많다 ··········································································································· 801. 복사나무

8. 꽃받침에 털이 없다 ·············································································································· 802. 산복사

7. 잎끝은 3 개 또는 결각상으로 갈라진다 ························································································· 803. 풀또기

1. 열매는 둥글고 흰 가루가 없으며 털은 있는 것과 없는 것이 있고 끝눈이 있다.

9. 꽃은 총상화서에 10 개 이상 달리고 포가 작다.

10. 꽃받침은 열매에 쟁반처럼 남고 꽃차례 밑에 잎이 달린다 ····························································· 804. 섬개벚나무

10. 꽃받침은 떨어지고 꽃차례에 잎이 달린 것과 없는 것이 있다.

11. 꽃차례 밑부분에 잎이 없고 잎은 뒷면에 선점이 밀생한다 ··························································· 805. 개벚지나무

11. 꽃차례 밑부분에 잎이 있고 잎은 선점이 없다 ············································································ 806. 귀룽나무

9. 꽃은 5-6 개 씩이고 총상화서에 달리지 않으며 포가 발달한다.

12. 겨울눈은 잎겨드랑이에 1 개씩 달린다.

13. 꽃받침잎은 젖혀지지 않는다.

14. 암술대에 털이 있다.

15. 꽃받침통의 밑부분이 보다 굵고 꽃은 산형상으로 달리며 꽃자루와 잎 뒤에 털이 있다························ 810. 올벚나무

15. 꽃받침통은 원통형이며 산방화서이거나 꽃대축이 없다.

16. 꽃받침잎에 털이 약간 있거나 없다 ··············································································· 808. 한라벚나무

16. 꽃받침잎에 털이 있다 ································································································ 809. 왕벚나무

14. 암술대에 털이 없다.

17. 꽃자루에 털이없다.

18. 잎에 털이 없다.

19. 산방화서로서 잎은 뒷면이 회록색이고 장란형이며 꽃은 잎과 같이 피고 꽃잎은 타원상 난형이다 ······· 811. 벚나무

19. 산형 또는 짧은 산방화서로서 꽃은 잎보다 먼저 또는 일찍 피고 색깔이 짙다 ···························· 813. 산벚나무

18. 잎 뒷면에 털이 있으며 꽃대축은 길거나 짧고 잎은 밝은 녹색이며 꽃이 잎 보다 먼저 피고 암술이 수술보다 길다 ··································· 814. 개벚나무

17. 꽃자루에 털이 있다. 꽃잎은 난원형이며 길이 1cm 정도이고 암술이 수술보다 길다 ························· 812. 꽃벚나무

13. 꽃받침잎은 뒤로 젖혀진다.

20. 꽃잎은 끝이 둥글다.

21. 잎의 표변에 주름이 없고 소화경은 길이 1.5 cm로서 털이 있다 ·············································· 807. 산개벚지나무

21. 잎의 표변에 주름이 지고 소화경은 같이 4cm 로서 털이 없다 ·························································· 816. 양벚

20. 꽃잎은 끝이 파졌다 ········································································································ 815. 섬벚나무

12. 겨울눈은 잎겨드랑이에 3 개씩 달린다.

22. 씨방에 털이 없다.

23. 잎은 피침형 또는 도피침형이며 암술대에 털이 없다.

24. 잎은 피침형이고 톱니는 미철두이다 ······················································································817. 산옥매

24. 잎은 도피침형이고 점철두이다 ························································································ 818. 복사앵도

23. 잎은 난형 또는 도란형이며 암술대에 털이 있다.

25. 꽃자루에 털이 없거나 있다 ····························································································· 819. 이스라지

25. 꽃자루에 털이 없다 ····································································································819+. 산이스라지

22. 씨방 · 옆자루 및 잎의 뒷면에 털이 있다 ···························································································820. 앵도