장미아과 Rosoideae

1. 꽃턱은 통형이다.

  2. 꽃턱 안에 들어 있는 많은 심피는 성숙하면 연하게 된다 ·················································································장미속

  2. 꽃턱 안에 들어 있는 2 개 내지 많은 심피는 성숙하면 굳어지거나 간혹 연해진다.

    3. 꽃에 겉꽃받침이 있다··················································································································· 짚신나물속

    3. 꽃에 겉꽃받침이 없다 ·····················································································································오이풀속

1. 꽃턱은 편평하거나 접시형이다.

  4. 꽃은 취산상 산방화서에 많이 달린다 ···································································································· 터리풀속

  4. 꽃은 엉성한 취산화서를 형성하거나 1 개씩 달린다.

    5. 씨방은 보통 많으며 두상이고 적을 때는 수술의 수도 적다.

      6. 씨방에는 대개 밑씨가 1 개씩 있으며 열매는 수과이고 겉꽃받침이 있다.

        7. 밑씨는 곧추서며 열매에 암술대가 남아 있다.

          8. 암술대는 전부 또는 일부가 남아 있다.

            9. 꽃의 부분은 5수이다 ················································································································· 뱀무속

            9. 꽃의 부분은 8-9 수이다 ·································································································750. 담자리꽃나무

          8. 암술대는 밑의 잘록한 부분에서 떨어진다 ·············································································· 748. 나도양지꽃

        7. 밑씨는 밑으로 처지며 열매에서 암술대가 떨어졌다.

          10. 꽃턱은 마른 막질이다.

            11. 심피는 5~12 개이다.

              12. 수술은 꽃잎과 호생하고 암술은 4~5 개이다 ·······································································749. 너도양지꽃

              12. 수술은 꽃잎과 대생하고 암술은 5~20 개이다 ······································································· 729. 좀낭아초

            11. 심피는 다수이다.

              13. 꽃턱은 대개 약간 커지며 빛깔이 없고 겹꽃받침은 꽃받침보다 보통 작다 ··············································양지꽃속

              13. 꽃턱은 매우 커지며 벚낌이 있고 해면질로서 액질이다 ······························································· 725. 뱀딸기

          10. 꽃턱은 액질이다 ··················································································································· 땃딸기속

      6. 씨방에는 밑씨가 2 개씩 들어 있으며 열매는 핵과이고 겉꽃받침이 없다   ························································ 딸기속

    5. 씨방은 소수이며 수술은 다수이다.

      14. 잎은 호생하고 겉꽃받침이 없으며 꽃은 5수이다 ···············································································724. 황매화

      14. 잎은 대생하며 겉꽃받침이 있고 꽃은 4수이다 ···········································································723. 병아리꽃나무