Abstract Eight triterpenes of the serratane type have been isolated from Lycopodium megastachyum Baker. They are serratenediol, 21- epi -serratenediol, serratenediol-3-acetate, 21- epi -serratenediol-3-acetate, lycoclavanol, tohogenol diacetate, phlegmanol-D and serratenonediol diacetate.