④ 벼 아 과 Oryzoideae

1. 소수는 양성이다.

2. 포영이 없다 ································································································································ 나도겨풀속

2. 포영이 있다        ······························································································································104. 벼

 1. 소수는 단성이다     ·····························································································································103. 줄

나도겨풀속 Leersia Sw.

1. 수술은 6 개이다    ························································································································101. 나도겨풀

1. 수술은 3개이다.

2. 소수는 길이 4.5-6 mm 이다 ·············································································································102. 좀겨풀

2. 소수는 길이 5-6.5 mm 이다 ··············································································································· 102+. 겨풀