층층이꽃속 Clinopodium LINN.
1. 소포는 선형이며 소화경보다 길고 퍼진 털이 있다 ·················································································· 254. 층층이꽃
1. 소포는 소화경보다 짧거나 비슷하다.
2. 잎에 선점이 있고 꽃받침에 퍼진 털이 있다 ···················································································255. 두메층층이
2. 잎에 선점이 없거나 희미하다.
3. 꽃부리는 길이 5~6mm이고 꽃받침은 길이 3.5-4mm로서 짧은 벌이 있으며 꽃은 담홍색이다 ·························256. 애기탑꽃
3. 꽃부리는 길이 8-9mm로서 희고 꽃받침은 길이 6mm로서 짧은 털과 퍼진 털이 있다 ········································257. 탑꽃