물꼬리풀속 Dysophylla BLUME

1. 다년초로서 지하경이 있고 잎은 4 개씩 윤생한다 ············································································· 262. 전주물꼬리풀

1. 1년초로서 지하경이 없고 잎은 3~6개씩 윤생한다    ···············································································263. 물꼬리풀