Three new alkaloids—inundatine [V], isoinundatine [VI] and dehydrolycopecurine [VII]—have been isolated from Lycopodium inundatum L. together with methyl p‐coumarate [I], α‐onocerine [II], lycopodine [III] and lycodoline [IV]. Copyright © 1971 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim