I Have Known and Loved) however, both ergine and isoergine are "probably correctly dismissed" as not contributing to the effects of morning glory seeds. The poorly-stable lysergic acid hydroxyethylamides (LSHs) might alternatively be involved in the psychedelic effects of morning glory seeds per Shulgin.

Sleepy grass (Achnatherum robustum) and Claviceps paspali (ergot) have similar ergoline