| Accepted name | Ipomoea corymbosa (L.) Roth. Linnaeus published the basionym Convolvulus corymbosus in 1759; Roth’s combination appeared in 1819. Current phylogenetic and global taxonomic treatments place the species within Ipomoea (Muñoz-Rodríguez et al., 2019; Wood et al., 2020; POWO, 2026). |
| Principal synonyms | Turbina corymbosa (L.) Raf.; Rivea corymbosa (L.) Hallier f.; Legendrea corymbosa (L.) Ooststr. These names are taxonomic synonyms, not separate ethnobotanical species. “Turbina” persists because the one-seeded, indehiscent fruit once supported a segregate genus. |
| Family | Convolvulaceae, the morning-glory family. |
| Order | Solanales. |
| Geographic range | Native from Mexico and the Caribbean through Central America into tropical South America, including Colombia, Venezuela, Ecuador, Peru, Bolivia, Brazil and Paraguay. It is naturalised in Florida and other warm regions of the Americas, Macaronesia, Africa, South and Southeast Asia and Australia. The species grows principally as a liana in wet tropical forest margins, secondary vegetation, hedges and disturbed ground (Wood et al., 2020; POWO, 2026). |
| Local names | Ololiuhqui/ololiuqui primarily names the rounded seeds or drug in Nahuatl-language sources; the vine is described as coaxihuitl or coatl xoxouhqui. Spanish and regional names include semilla de la Virgen, manto de la Virgen, hiedra, bejuco, aguinaldo blanco and Christmas vine. Piule is a wider regional category and cannot be assigned automatically to this species. Tlitliltzin, the “black little one”, generally denotes black angular morning-glory seeds associated with I. tricolor, though historical naming is not perfectly stable (Schultes, 1941; Wasson, 1963; Fagetti, 2025). |
| Growth form | Long-lived, vigorous, woody twining vine, often several metres long, with slender glabrous or sparsely hairy stems. It climbs shrubs and trees and may form broad flowering masses in season. |
| Conservation | No global IUCN assessment. Its broad native range, ornamental cultivation and naturalisation suggest that the species as a whole is not narrowly threatened. This does not measure the security of ritual seed lineages, local access, named knowledge or habitats; conversely, in some introduced regions the vine is managed as an environmental weed (CABI, 2026; POWO, 2026). |
Leaves are alternate, entire, broadly ovate to cordate, generally with an acute or acuminate tip and a deeply heart-shaped base. The inflorescences are conspicuous many-flowered cymes that can appear corymb-like, giving the species its epithet. The salverform to narrowly funnel-shaped corollas are white, sometimes greenish at the throat, with a long tube adapted to animal pollination. Sepals persist and enlarge around the developing fruit. The mature fruit is globose to ovoid, dry, woody and indehiscent, normally enclosing one smooth brown seed. That fruit differs from the dehiscent capsules common in many morning glories and drove the earlier classification in Turbina (Wood et al., 2020).
The vine produces abundant nectar and can be a significant honey plant. In the Yucatán, the Maya name xtabentún is associated with the flower and with a honey-based anise liqueur; in Cuba its winter flowering has contributed to the English name Christmas vine. Pollinator, ornamental and ritual economies therefore overlap without being identical. Seed-bearing plants also transmit the fungal partner that produces their characteristic ergoline chemistry.
Large-scale molecular and morphological studies dissolve Turbina into Ipomoea. Ipomoea corymbosa is consequently the accepted name, even where ethnographic and chemical studies retain Rivea corymbosa or Turbina corymbosa (Muñoz-Rodríguez et al., 2019; Wood et al., 2020).
Rounded tan-brown ololiuhqui and black angular tlitliltzin were differentiated in twentieth-century fieldwork. The latter is usually identified with Ipomoea tricolor; translations that call both simply “morning glory” obscure botanical and ceremonial distinctions (MacDougall, 1960; Wasson, 1963).
Colonial plant names were relational categories embedded in Nahua medicine, tribute, locality and ritual. No modern binomial should be projected onto every occurrence of ololiuhqui, piule or “seed of the Virgin” without a specimen, image or precise description.
Morning-glory identifications proposed for the Tepantitla murals at Teotihuacan and for flowers on the Xochipilli statue are suggestive analogies, not secure species determinations. They cannot presently substitute for archaeobotanical evidence (Furst, 1974).
The seeds contain a variable mixture of clavine and lysergic-acid-derived ergot alkaloids. The central compounds are lysergic acid α-hydroxyethylamide (LAH/LSH), ergine (lysergic acid amide; LSA), isoergine, ergometrine/ergonovine, lysergol, chanoclavine-I and elymoclavine. Freshness, seed maturity, fungal chemotype, storage and extraction alter the measured profile. LAH is chemically labile and can hydrolyse to ergine, so an old analysis rich in “LSA” does not necessarily describe the chemistry of fresh ritual material (Hofmann and Tscherter, 1960; Hofmann, 1963; Beaulieu et al., 2021).
The decisive modern revision is that I. corymbosa does not synthesize these alkaloids autonomously. Periglandula turbinae, a clavicipitaceous fungus, lives epibiotically on young adaxial leaf surfaces in close association with secretory glands and is transmitted systemically through the seed. The relationship is macroscopically asymptomatic. Fungal genes encode ergot-alkaloid biosynthesis; infected seeds carry both the symbiont and its chemistry into the next plant generation (Steiner et al., 2011; Steiner and Leistner, 2012).
A survey of 210 morning-glory species found ergot alkaloids concentrated in four host clades and correlated their presence with larger seeds. Within species, alkaloid-positive and -negative accessions can coexist. This phylogenetic and chemotypic mosaic explains why a botanical name alone cannot guarantee a particular chemical profile. Defensive benefit against seed predators, herbivores or nematodes is consistent with comparative data, but the ecological advantage has not been demonstrated experimentally for every I. corymbosa population (Beaulieu et al., 2015; 2021).
Ergine binds serotonin receptors including 5-HT₂A and also adrenergic and dopamine receptors, though generally with lower affinity and efficacy than LSD. Ergometrine and other co-occurring lysergamides add distinct vascular, visceral and central actions. The seed cannot be reduced pharmacologically to “natural LSD” (Paulke et al., 2013; Steiner and Leistner, 2018).
LAH readily decomposes or hydrolyses, while epimerisation produces iso forms. Handling history can therefore transform the object under analysis. Modern LC–MS profiles and voucher-backed fungal tests are more interpretable than nominal “LSA content” detached from storage conditions (Beaulieu et al., 2021).
Controlled human work isolated ergine and isoergine but did not reconstruct the fresh seed ensemble. Which compound, ratio or metabolite best accounts for ceremonial visionary effects remains unresolved; LAH is a leading candidate but lacks adequate human pharmacology (Isbell and Gorodetzky, 1965; Steiner and Leistner, 2018).
Recent microscopy and transcript work in other Ipomoea hosts maps fungal tissue distribution and pathway expression. The 2025 isolation of Periglandula clandestina from I. tricolor provides a comparative model, but it is not the symbiont of I. corymbosa (Olaranont et al., 2022; Hazel et al., 2025).
| Early colonial record | Sixteenth century Sahagún’s Nahua informants described ololiuhqui as a seed that intoxicated, disclosed fearful visions and entered medicinal practice. Francisco Hernández described the twining white-flowered plant and rounded coriander-like seed during his New Spain research of the 1570s; the illustration appeared in the 1651 Roman edition. These texts are the earliest securely identifiable records presently available (Sahagún, 1950–1982; Hernández, 1651; Schultes, 1941). |
| Extirpation archives | Seventeenth century Ruiz de Alarcón’s 1629 Tratado and de la Serna’s 1656 manual recorded consultations, offerings, prayers and divinatory questions while instructing clergy to suppress them. Their density shows persistence under colonial rule, but their categories—“superstition”, “devil” and “idolatry”—belong to the prosecution apparatus, not neutral Indigenous description (Ruiz de Alarcón, 1629/1984; de la Serna, 1656/1953). |
| Pre-Conquest antiquity | Strongly inferred Nahuatl nomenclature, the breadth of early testimony and the practice’s entanglement with Indigenous medicine make a pre-Conquest history highly probable. There is, however, no securely published archaeobotanical I. corymbosa seed assemblage that fixes an earlier date. “Aztec drug” is thus historically meaningful but archaeologically less precise than is often assumed. |
| Iconographic proposals | Contested Peter Furst proposed that a flowering vine in the Tepantitla mural complex at Teotihuacan represented ololiuhqui and linked it with a rain/fertility complex. Similar identifications have been made for the Xochipilli statue. Formal resemblance and later analogy are insufficient for species-level certainty; these are hypotheses about deep history, not direct evidence (Furst, 1974). |
| Modern continuity | Twentieth–twenty-first centuries Field reports among Zapotec, Chinantec and Mazatec communities, and recent research among Mixtec, Nahua and Mazatec specialists in Guerrero, Oaxaca and Puebla, document continuing or remembered use of semilla de la Virgen, ololiuhqui and related morning-glory medicines (Schultes, 1941; Wasson, 1963; Fields, 1969; Fagetti, 2025). |
Historical and ethnographic accounts describe seeds ground and suspended in water before oral consumption, commonly in darkness or at night. Silence, fasting, sexual abstinence, clean space, candles, copal, flowers and prayer appear in different regional records; no single sequence is universal. What recurs is a tightly framed question. The medicine is approached to disclose why an illness began, whether sorcery or interpersonal conflict is involved, where a lost object lies, who committed a theft, whether a traveller will return, or what treatment should follow. Darkness reduces ordinary distraction and makes dreamlike imagery, voices and bodily signs available for interpretation (Schultes, 1941; Wasson, 1963; Fields, 1969).
Colonial descriptions emphasise ingestion by a ritual specialist, yet later field reports also include patients who receive the seed under supervision while a knowledgeable attendant listens to their speech and helps interpret it. Divination is thus distributed among plant/fungus, sufferer, healer, kin and ritual setting. The answer may arrive as scene, person, animal, voice, remembered event or felt certainty rather than as spectacular visual display. Diagnosis and cure are socially joined: revelation can identify an offended being, neglected obligation or damaged relationship that subsequent prayer, offering, herbal treatment or restitution must address.
The Spanish ecclesiastical campaign against ololiuhqui was unusually explicit. Confessional manuals asked about possession and consultation; extirpators destroyed seeds and punished practitioners. At the same time, colonial society continued to use Indigenous healers, and the documentary archive expanded because priests needed detailed descriptions of what they opposed. Later Catholic names do not prove that Indigenous cosmologies disappeared. “Seed of the Virgin” can position visionary agency within Marian protection while retaining local ideas of respect, reciprocity, offence and disclosure. The resulting tradition is syncretic in the historical sense of layered institutions and translations, not a lesser or derivative version of an imagined pristine rite (Aguirre Beltrán, 1963; Fagetti, 2025).
In Nahua and Oaxacan practice, ololiuhqui is better described as a nonhuman knower than as a passive chemical key. Colonial sources repeatedly attribute speech, sight and punitive power to the seed: consultation requires correct address, and disrespect may itself produce affliction. Knowledge is not imagined as information stored inside matter and extracted by a consumer. It is a relation established through prayer, abstinence, ingestion, darkness and interpretive discipline. This helps explain why the same pharmacological material can be used for diagnosis, moral adjudication and locating persons or objects (Ruiz de Alarcón, 1629/1984; Fagetti, 2025).
Three figurations recur without forming one universal myth. The vine’s twining morphology supports the name “snake-plant”; the rounded seed gives ololiuhqui its material index; and the Virgin lends a Christian sacred person through whom the medicine may be named and approached. Contemporary accounts sometimes gender the medicine feminine and associate it with Mary, young female saints or a maternal healer. These identities are local and historically layered. They should not be collapsed into an all-Mesoamerican “morning-glory goddess”, nor assumed to reproduce Aztec theology unchanged (Fagetti, 2025).
“Ololiuhqui, which some call coaxihuitl, or snake-plant, is a twining herb.”Francisco Hernández, sixteenth-century description published in 1651; translation reproduced in Schultes (1941)
Commonly about 30–90 minutes after oral ingestion, but highly variable with the seed ensemble, bodily state and ceremonial context. Early phases may foreground heaviness, nausea, chills, warmth, changes in salivation and a drift toward inward attention.
Principal effects are often reported over roughly 5–8 hours, with the most absorptive or visionary phase within the first 2–4 hours and residual fatigue, dreaminess or reflective clarity extending beyond it. Historical experiments and whole-seed practice are not kinetically identical.
Variable rather than simply weak or strong. Alkaloid-positive and -negative lineages, fungal chemotypes and degradation change potency. In ritual use, intensity also concerns the authority and intelligibility of disclosure, not only sensory magnitude.
Dreamlike, hypnagogic and inwardly absorbed; slowed or discontinuous thought; closed-eye scenes, persons, animals and places; altered temporal sequence; auditory or verbal impressions; emotional revelation; and a felt transition between waking, sleep and vision.
Heaviness, fatigue, muscular relaxation or tension, gastric discomfort, vasoconstrictive coldness and uterine/visceral sensations can be phenomenologically prominent. The body may be interpreted diagnostically rather than dismissed as peripheral “side effect”.
A prior question organises ambiguous imagery into evidence. Faces may identify an offender; roads or houses locate an object; a voice names a medicine; animals or weather signal relational causes. Attendant interpretation and later verification complete the visionary event.
Sahagún’s account emphasises frightening apparitions and loss of ordinary judgement, while later Oaxacan reports describe a quieter, more oracular state in which the source of illness or location of a missing object becomes visible. These are not contradictory descriptions of a single invariant syndrome. Colonial hostility, botanical species, seed freshness, ceremonial framing and the questions put to the medicine all differ. Accounts from Chinantec and Mazatec settings emphasise nighttime silence and the emergence of answer-like imagery; Zapotec reports foreground consultation in the treatment of illness and misfortune (Sahagún, 1950–1982; Wasson, 1963; Fields, 1969).
The common modern comparison with LSD is chemically intelligible but phenomenologically incomplete. Both involve lysergamides and serotonergic signalling, yet ololiuhqui reports are more often sedating, oneirogenic and somatically weighted than the prolonged bright wakefulness popularly associated with LSD. Isbell and Gorodetzky’s clinical work found ergine capable of perceptual alteration and sedation, but isolated-alkaloid experiments removed the prayer, darkness, question, whole-seed matrix and social interpretation that make divination a cultural practice (Isbell and Gorodetzky, 1965).
Images can unfold as dreamlike tableaux rather than geometric overlays: a person performing an action, a road, dwelling, landscape, animal or hidden object. Their relevance depends on the question asked.
The answer may be heard as words, arrive as an internally voiced name or appear as a sudden certainty. Ethnographic “speech of the seed” therefore cannot be reduced to visual hallucination.
Pain, pressure, purging, coldness or movement in a particular bodily region may be read as information about affliction. The difficult body and the revelatory body are not separate phenomenological channels.
Reports of locating thieves, objects or causes are culturally important but rarely documented through prospective methods. Their evidential force within a community may rest on later events, social consensus and therapeutic change rather than laboratory validation.
“fatigue, sedation, and sleep”Summary of Hofmann’s ergine self-observation in Isbell and Gorodetzky (1965, p. 332); isolated ergine, not a ritual seed session
Ipomoea corymbosa is geographically extensive and can become abundant in disturbed habitats. Species-level scarcity is therefore not the principal conservation issue. More fragile are local fungal chemotypes, selectively maintained vines, access to uncontaminated ritual seed, Indigenous-language names, specialist protocols and the social legitimacy of divinatory healing. Biocultural conservation requires distinctions between protecting a taxon, maintaining a symbiosis and sustaining a practice. In introduced environments, those aims may conflict with weed management, because vigorous vines can smother native vegetation (CABI, 2026; Beaulieu et al., 2021).
| Ritual circulation | Ethnographic accounts more often describe small-scale cultivation, specialist custody and interpersonal exchange than a large public market. A single mature vine can produce substantial seed, making social control of knowledge and access more important than acreage. |
| Honey and ornament | The white flowers yield abundant nectar and the vine is grown ornamentally. Honey associated with xtabentún flowers supports a regional Yucatecan liqueur economy, while Caribbean Christmas flowering contributes to apiculture. These commodity chains do not necessarily involve visionary seed use. |
| Online seed trade | International “ethnobotanical” and ornamental markets sell seeds under Rivea, Turbina and Ipomoea corymbosa. Misidentification with I. tricolor, Argyreia nervosa or non-alkaloid morning glories is recurrent; fungal infection and chemotype are seldom verified. |
| Research value | The vertically inherited Periglandula system is a model for plant–fungus coevolution, natural-product biosynthesis and defensive mutualism. Its pharmaceutical interest lies in pathway biology and ergoline diversity rather than a single patented “ololiuhqui molecule”. |
Neither I. corymbosa nor ololiuhqui seeds are named in the UN schedules. Regulation commonly attaches instead to particular alkaloids, preparations, intent, import rules or invasive-plant law. In the United States, lysergic acid amide is listed in Schedule III under federal controlled-substance regulations, while the living vine and untreated seed are not federally scheduled as such. The United Kingdom controls lysergide and named lysergamide derivatives through the Misuse of Drugs Act framework; exact treatment of a botanical specimen depends on composition and legal construction. Australia and some US states may additionally regulate particular morning glories as weeds or prohibited plants. Because categories differ sharply, “legal seeds” and “illegal plant” are both overgeneralisations (eCFR, 2026; Home Office, 2025; CABI, 2026).
Patent searches retrieve broad claims involving Ipomoea extracts, glycoresins, anticancer ipomoeassins, herbicidal control and engineered ergot-alkaloid pathways. WO2015195535A2 claims fungal genetic systems for producing lysergic acid; WO2023096577A2 claims recombinant production using, among other sources, pathway genes from Periglandula ipomoeae. Other applications merely include Turbina corymbosa in long lists of possible botanical source materials. These are not patents over the historical ololiuhqui tradition, and no granted patent located in this review owns the species as such. The more relevant questions concern disclosure of genetic-resource origin, access to fungal strains, benefit-sharing and Indigenous knowledge as prior art. The 2024 WIPO treaty establishes a patent-disclosure framework for inventions materially based on genetic resources or associated traditional knowledge, though implementation remains national (WIPO, 2024).
Beaulieu and colleagues mapped ergot alkaloids across a broad phylogeny, showing repeated evolutionary concentration, within-species variation and a positive relation between seed mass and alkaloid concentration. This replaces assumptions of uniform “LSA plants” with host–symbiont chemotypes (Beaulieu et al., 2021).
Microscopy and transcript studies in I. asarifolia trace fungus through young leaves, flowers and seeds and connect fungal presence with ergine-pathway expression. Comparative transfer to I. corymbosa remains a research task, not a settled equivalence (Olaranont et al., 2022; 2025).
The first isolation and genome-scale characterisation of the cryptic I. tricolor symbiont expands the comparative system. It clarifies why related morning-glory medicines can carry distinct fungi and chemistries (Hazel et al., 2025).
Fagetti’s synthesis places I. corymbosa and I. tricolor within Mixtec, Nahua and Mazatec healing, attending to Catholic sacred figures, local names and therapeutic practice. It is the most recent substantial regional treatment located for this monograph (Fagetti, 2025).
No modern study combines community-led ethnography, botanical voucher, verified P. turbinae status, fresh-seed metabolomics and systematic phenomenology. Without that conjunction, chemical and cultural literatures continue to describe partly different objects.
Direct residue, seed or microfossil evidence securely attributable to I. corymbosa remains sparse. Non-destructive reanalysis of museum collections and colonial-period vessels could test iconographic and historical hypotheses without presuming them true.
| Mazatec Divinatory Medicine Complex | Ceremonial complex page: a plural diagnostic repertoire in which Virgin Seed traditions coexist with mushrooms, Salvia divinorum, cacao and other medicines without becoming interchangeable. PRIMARY CEREMONIAL COMPLEX |
| Ipomoea tricolor | Companion morning glory associated with tlitliltzin, badoh negro and other black-seed traditions; hosts a distinct symbiont now named Periglandula clandestina. SISTER DIVINATORY MEDICINE |
| Salvia divinorum | Species monograph: Mazatec ska María Pastora, a taxonomically and pharmacologically unrelated Virgin-associated divinatory medicine. REGIONAL RITUAL RELATION |
| Psilocybe spp. | Mazatec ndi xi tjo and related mushroom medicines used in nocturnal consultation, cure and sacred speech. Their prominence should not eclipse parallel seed lineages. REGIONAL RITUAL RELATION |
| Argyreia nervosa | Asian-Pacific morning glory whose ergoline-bearing seeds became globally marketed as “Hawaiian baby woodrose”; chemically comparable but not part of the documented Mesoamerican ololiuhqui tradition. CHEMICAL COMPARATOR |
| Claviceps purpurea | Species monograph: pathogenic grass ergot and the historical source of ergot pharmacology; related fungal chemistry, radically different ecology and cultural history. FUNGAL COMPARATOR |
| Peyote traditions | A distinct Mesoamerican/North American ceremonial complex whose colonial archive intersects with ololiuhqui in extirpation texts, while botany, chemistry, institutions and ritual geographies differ. HISTORICAL COMPARATOR |