금계국속 Coreopsis LINN.

1. 두화는 중앙이 자갈색이다.

2. 잎은 1 회 우상복엽이며 정열편이 특히 크다 ················································································ 685. 금계국

2. 잎은 2 회 우상복엽이며 정열편이 특히 크지 않다 ···········································································686. 기생초

1. 두화는 중앙도 황색이다 ········································································································ 687. 큰금계국