지치과 Borraginaceae

1. 씨방은 갈라지지 않고 암술대는 정생한다.

2. 암술머리는 2개이다  ··················································································································173. 송양나무

2. 암술대는 1 개이다  ····················································································································174. 모래지치

1. 씨방은 4 개로 갈라진다.

3. 꽃부리는 통형이며 후부 또는 풍부에 부속체가 없다     ··················································································지치속

3. 꽃부리 후부에 안으로 향한 5 개의 솔기가 있다.

  4. 소견과는 속이 패인 밑부분으로 붙고 가장자리에 잔 같은 돌기가 있다  ·······················································184. 컴프리

  4. 소견과 착생면 밑은 비지 않았고 가장자리에 잔 같은 돌기가 없다

    5. 소견과에 잔가시가 있다.

      6. 소견과는 끝부분에 달리고 꽃턱은 피라미드형이며 잎은 장타원상 피침형 또는 파침형 이다   ·······················176. 섬꽃마리

      6. 소견과는 복면의 중부 또는 하부에 붙어 있다.

        7. 꽃턱은 송곳형이며 소견과의 길이와 같거나 이보다 길고 잎은 선형이다  ···················································돌지치속

        7. 꽃턱은 피라미드형이며 소견과보다 훨씬 짧고 잎은 선형 또는 난형이다.

          8. 꽃받침은 열매에서 젖혀지며 견과는 겉에 긴 가시가 있다 ································································179. 뚝지치

          8. 꽃받침은 열매 때에 곧추서고 견과에는 짧은 가시가 있다   ······························································178. 산지치

    5. 소견과에 가시가 없다.

      9. 수술은 꽃부리 밖에 나와 있다.

        10. 위쪽 잎은 윤생에 가깝고 소견과는 4면체이며 윤채가 나고 꽃턱은 편평하다  ·······································175. 당개지치

        10. 잎은 호생한다   ···················································································································188. 갯지치

      9. 수술은 꽃부리 안에 들어 있다

        11. 소견과 배면에 접시 같은 돌기가 있다    ······················································································177. 자반풀

        11. 소견과에 접시 같은 돌기가 없다.

          12. 소견과에 사마귀 같은 돌기가 밀생하며 복면 중부가 들어갔고 밑부분으로 붙는다. 꽃턱은 편평하다 ·················꽃바지속

12. 소견과에 사마귀 같은 돌기가 없고 복면이 들어가지도 않는다.

13. 꽃부리 열편은 꽃봉오리 때 복와상으로 접혀있다 ······································································꽃마리속

13. 꽃부리 열편은 꽃봉오리 안에서 꼬여있다 ··········································································· 194. 왜지치