Partial or simplified ergolines and lysergamides are analogues of ergolines and lysergamides like the psychedelic drug LSD in which one or more atoms or bonds, for instance within the ergoline ring system, have been removed. Additional substitutions may also be added, for instance on the A ring of the ergoline nucleus. It is notable that the ergoline ring system contains embedded tryptamine and phenethylamine moieties within its structure, and so some partial ergolines are simple tryptamines, cyclized tryptamines, simple phenethylamines, and/or cyclized phenethylamines.