② 비짜루아과 Asparagoideae

1. 외화피 열편은 크고 녹색이며 내화피 열편은 작거나 없다.

2. 잎은 줄기끝에 4개이상 윤생하고 꽃은 4수 또는 다수이다 ····································································· 522. 삿갓나물

2. 잎은 줄기끝에 3개씩 윤생하고 꽃은 3수이다.

3. 꽃받침잎과 꽃잎은 끝이 뾰족하고 꽃자루는 길이 2~3cm이다 ······························································523. 큰연령초

3. 꽃받침잎과 꽃잎은 끝이 둔하고 꽃자루는 길이 4~6cm이다 ····································································524. 연령초

1. 내외열의 화피 열편은 모양과 크기가 비슷하다.

4. 지하경액에서 꽃줄기가 나온다.

5. 암술대 끝은 둥글고 3개로 얇게 갈라진다 ·······················································································525. 은방울꽃

5. 암술대 끝은 넓다.

6. 수상화서에 꽃이 많이 달리고 잎자루가 없다 ···················································································526. 만년청

6. 꽃은 끝에 1 개씩 달린다 ············································································································ 527. 엽란

4. 지하경의 끝이 꽃줄기로 되며 지하경 기부에서 새 지하경이 자란다.

7. 지상의 잎은 크다.

8. 잎은 모두 뿌리에서 돋는다····································································································528. 나도옥잠화

8. 잎은 줄기에서 돋는다

9. 꽃이나 꽃차례는 줄기끝에 달린다

10. 꽃차례는 갈라지지 않고 총상 또는 원추상이다.

11. 꽃은 2수이고 잎은 2개이다  ······························································································두루미꽃속

11. 꽃은 3수이고 잎은 많다 ····································································································· 풀솜대속

10. 흔히 가지가 갈라지며 꽃은 1개 또는 산상으로 달린다 ··································································애기나리속

9. 꽃은 잎겨드랑이에 달린다.

12. 화피 열편은 붙어서 통으로된다    ··························································································· 둥굴레속

12. 화피 열편은 떨어져 있다  ·································································································죽대아재비속

7. 잎은 작고 비늘 같으며 그 틈에서 잎 또는 가시 같은 가지가 돋는다 ······························································ 비짜루속