명아주과 Chenopodiaceae

1. 배는 말굽처럼 생겼거나 나선상이며 배유는 거의 없거나 전혀 없다.

2. 줄기는 육질이며 마디가 뚜렷하다     ······························································································263. 퉁퉁마디

2. 줄기는 약간 육질이며 마디가 뚜렷하지 않다.

3. 꽃받침은 열매의 날개가 되며 잎 끝이 바늘 같다   ··············································································· 수송나물속

3. 꽃받침은 날개가 없으며 잎은 육질이고 끝이 둔하다    ·············································································나문재속

1. 배는 환상이며 배유의 일부 또는 전부를 둘러싼다.

4 열매는 벌어지지 않는다.

5. 꽃받침잎은 3-5개이다.

6. 꽃은 완전하고 때로 암꽃이 섞여 있다.

7. 열매에 달린 꽃받침잎에 날개나 침이 있다   ·················································································264. 댑싸리

7. 열매에 달런 꽃받침잎에 날개나 침이 없다  ······················································································명아주속

6. 꽃은 1-2 가화이다.

8. 소포는 열매 끝까지 유착하여 딱딱하게 된다   ··············································································266. 시금치

8 소포는 열매의 중앙까지 유착하며 딱딱하다···················································································갯능쟁이속

5. 꽃받침 잎은 1 개이다  ···············································································································272. 호모초

4. 열매는 벌어진다   ··························································································································251. 근대