잠자리피속 Trisetum PERS

1. 소수는 길이 6~10mm이고 꽃차례는 다소 퍼진 원추형이다.

2. 호영은 얕게 갈라지고 꽃밥은 길이 2~3mm이다 ·····································································181. 시베리아잠자리피

2. 호영은 끔이 깊게 갈라져서 2개의 까락같이 보이고 꽃밥은 길이 1 mm 미만이다 ·········································182. 잠자리피

1. 소수는 길이 4~6mm, 꽃차례는 수상이고 화서축에 잔털이 있다······························································ 183. 산잠자리피