Morning glory

Traditional and historical use

The closely related Turbina corymbosa — known as ololiuqui ("round thing" in Nahuatl) — was used in Mesoamerican ritual contexts by Aztec, Mazatec, Zapotec, and other indigenous groups for divination and healing ceremonies.^[3] Spanish colonial authorities documented and suppressed these practices from the 17th century onward. I. tricolor was used alongside or interchangeably with T. corymbosa in some indigenous contexts under the Nahuatl name "tlitlitzin".^[3]

Western discovery and research

Richard Evans Schultes began field documentation of ololiuqui in the 1930s–1940s.^[11] In 1960, Albert Hofmann at Sandoz Laboratories isolated ergine and related ergot compounds from Rivea corymbosa seeds — a finding that initially provoked accusations of LSD contamination before independent researchers confirmed the results.^[4][12]

Modern era

Recreational use of morning glory seeds as a "legal LSD substitute" appeared in the United States during the 1960s, then subsided. A resurgence occurred in Poland and elsewhere in the 2010s, with systematic web-report analysis confirming symptoms consistent with earlier medical case reports.^[5]

In 2011, the fungal genus Periglandula was described as the true biological source of ergot alkaloids in Convolvulaceae.^[12] In 2025, the specific I. tricolor symbiont was named Periglandula clandestina sp. nov..^[1]

Ergine was listed as Schedule III under the United States Controlled Substances Act in 1970. Louisiana restricted morning glory seed consumption in 2005, and Italy classified morning glory seeds as controlled narcotic drugs in the early 2010s.^[13]

Taxonomy and family

Ipomoea tricolor Cav. belongs to the family Convolvulaceae (the bindweed or morning glory family). The genus Ipomoea comprises 600–700 species distributed primarily across tropical and subtropical regions.^[14] The common name "morning glory" is applied broadly across the genus; in the context of psychoactive use, it refers principally to I. tricolor and its named cultivars, including 'Heavenly Blue', 'Flying Saucers', and 'Pearly Gates'.

Native range and habitat

I. tricolor is native to tropical regions of the Americas and is now cultivated worldwide as an ornamental garden plant. It grows readily in warm, well-drained soils with full sun exposure and is commercially available as garden seed stock in most temperate and tropical countries.

Identification

I. tricolor is a fast-growing annual vine that can reach several meters in length. Leaves are heart-shaped with smooth margins. Flowers are funnel-shaped, typically 6–8 cm in diameter, and open in the morning — the trait that gives the plant its common name. The 'Heavenly Blue' cultivar produces vivid sky-blue flowers with a white throat; other cultivars display purple, white, or multicolored blooms. Seeds are small, dark brown to black, wedge-shaped, and hard-coated.

Harvesting

Seeds are the sole documented psychoactive part of the plant. They are harvested from mature seed pods after the flowers have dried and died back. The ergoline alkaloids responsible for psychoactive effects are not synthesized by the plant itself but by Periglandula clandestina, a heritable fungal endosymbiont residing within the plant's tissues.^[1]

Dominant alkaloid

LSA (ergine, d-lysergic acid amide) is the principal psychoactive alkaloid in I. tricolor seeds. Ergine is a semirigid ergoline structurally related to LSD, and its psychoactive mechanism is presumed to be partial agonism at 5-HT₂A serotonin receptors — inferred from structural analogy rather than published binding affinity data.^[2] No published binding affinity values for ergine at individual receptor subtypes exist in peer-reviewed literature.

Minor alkaloids

Morning glory seeds contain several additional ergoline alkaloids alongside ergine. Isoergine (d-isolysergic acid amide) is the C-8 epimer of ergine and is generally considered less psychoactive. Ergonovine (ergometrine) is a documented uterotonic agent with potent vasoconstrictor activity.^[12] The relative proportions of these alkaloids vary across cultivars and growing conditions, and no controlled comparison of isolated ergine versus crude seed extract has been conducted to determine how the alkaloid mixture modulates the subjective experience.

Variability

Alkaloid content varies substantially between seed batches, cultivars, and commercial sources. In one analytical study, 2 of 5 commercial lots tested contained zero detectable ergot alkaloids.^[6] This variability makes dose prediction from seed count unreliable. Potency differences likely reflect variation in the density and viability of the Periglandula endosymbiont across growing conditions and seed lineages.

Biosynthesis

The ergoline alkaloids in I. tricolor are not synthesized by the plant itself. They are produced by Periglandula clandestina, a vertically transmitted fungal endosymbiont first described in 2025.^[1] The biosynthetic pathway follows the general ergot alkaloid route from tryptophan and dimethylallyl pyrophosphate, paralleling the pathway in Claviceps fungi.

Where it acts

Ergine's psychoactive effects are presumed to arise primarily from partial agonism at 5-HT₂A serotonin receptors, the same mechanism established for LSD, psilocin, and other classical serotonergic psychedelics.^[2][7] Additional activity at 5-HT₁A receptors likely contributes to the prominent sedation, while dopamine D₂/D₃ agonism and alpha-adrenergic activity mediate peripheral vasoconstriction and body load.^[15]

What it changes

The heavy sedation and body load that distinguish morning glory from LSD may reflect ergine's higher relative activity at 5-HT₁A and D₂ receptors compared with its 5-HT₂A efficacy.^[15] CYP2D6 is the principal metabolic enzyme for lysergic acid amides,^[16] and individuals with poor-metabolizer phenotypes may experience prolonged, more intense effects at any given dose.^[16] Tolerance likely develops rapidly via 5-HT₂A downregulation, with expected cross-tolerance to LSD and psilocybin.^[2]

Available evidence derives from case reports involving LSA-containing seeds. In a prospective study of Argyreia nervosa seeds at body-weight-normalized doses, 3 of 4 subjects experienced severe adverse effects — cardiovascular dysregulation in 2 and a psychosis-like state in 1; all recovered within 9 hours.^[8] A fatal case involved an individual who fell from a building during LSA intoxication with co-ingested THC and ethanol, with a blood LSA concentration of 4.9 µg/L.^[9]

Commercially sold ornamental morning glory seeds are routinely treated with pesticide and fungicide coatings, presenting hepatotoxic and neurotoxic risk independent of ergoline alkaloid content.^[10] Treated seeds may be identifiable by brightly colored dust on the surface, but no reliable consumer method confirms the absence of treatment. The specific pesticides used have not been systematically identified in published literature. safety citation needed

No published data on heavy metal contamination, mycotoxin co-contamination, or microbial load specific to I. tricolor seeds as a recreational preparation were identified. No ISO/IEC-accredited laboratory testing program or Certificate of Analysis requirement exists for morning glory seeds sold as ornamental products.

The risk of precipitating persistent psychosis in predisposed individuals is analogous to other serotonergic psychedelics as a class. Persons with personal or family history of psychotic disorders or current depressive states with suicidal ideation face elevated risk.

Ergoline compounds as a class show low physical dependence liability, consistent with low compulsive use patterns.^[7] Ergotamine, a related ergot alkaloid used medicinally, can produce a physical dependence syndrome characterized by a self-sustaining headache-medication cycle;^[17] whether ergine produces analogous dependence at recreational doses is unknown.

Vasoconstrictors: Ergot alkaloids including ergonovine have potent vasoconstrictor activity. Co-administration with other vasoconstrictors increases ischemia risk.^[18]

CNS depressants (alcohol, benzodiazepines, opioids): Additive CNS depression. The sole documented fatality involving LSA-containing seeds involved co-ingestion of ethanol and THC.^[9]

CYP2D6 inhibitors (fluoxetine, paroxetine, bupropion): May increase ergine plasma levels and effect duration via reduced hepatic metabolism.^[16]

Contraindications

Morning glory plants and seeds (Ipomoea tricolor) are not scheduled under any United Nations drug convention — neither the 1961 Single Convention on Narcotic Drugs, the 1971 Convention on Psychotropic Substances, nor the 1988 Convention against Illicit Traffic.^[13] The isolated alkaloid ergine (d-lysergic acid amide) is separately controlled in some jurisdictions while the plant material itself remains legal in most. This creates a jurisdiction-specific legal landscape in which seed possession is typically lawful but alkaloid extraction is not.

Analog and treaty considerations

Ergine is not listed in UN international drug schedules. In the United States, the Federal Analogue Act (21 U.S.C. § 813) could theoretically apply to related lysergamides found in morning glory seeds if intended for human consumption, though prosecution under this provision for plant material is not documented in available case law. citation needed