Codex Cruz-Badianus

The Codex Cruz-Badianus, formally titled Libellus de Medicinalibus Indorum Herbis (“Little Book of the Medicinal Herbs of the Indians”), is the earliest surviving medical text from the Americas. Completed in 1552 at the College of Santa Cruz in Tlatelolco, Mexico, it records Aztec pharmaceutical knowledge in 185 illustrated plant entries organized by medical condition. An indigenous physician named Martin de la Cruz compiled the remedies in Nahuatl, and Juan Badiano, an Aztec student at the college, translated them into Latin. The manuscript was sent to Spain as a gift for the Spanish court and spent centuries in European collections before returning to Mexico in 1990.

Origin and Context

The codex was produced within the Franciscan educational system established in the wake of the Spanish conquest. The College of Santa Cruz at Tlatelolco, founded in 1536, trained indigenous students in Latin, theology, and European learning. The manuscript was created for Francisco de Mendoza, son of the first Viceroy of New Spain, apparently as evidence that indigenous peoples possessed genuine medical knowledge. This diplomatic purpose shaped the text: it presented Aztec medicine in the European herbal format, organized a capite ad calcem (from head to foot) in the Galenic manner, and rendered everything in Latin.

The text thus occupies an unusual position. It records pre-Columbian pharmaceutical knowledge but through a colonial filter. The organizational structure follows European convention, yet the remedies themselves (complex polyherbal preparations combining plants, minerals, and animal products) belong to a therapeutic tradition with no European equivalent. One trace of Badiano’s classical European education appears in the saliva-restoration recipe at folio 19v, which makes a passing reference to Pliny the Elder (Tucker, Arthur O.; Janick, Jules, 2020).

Structure and Content

The codex contains 185 phytomorphs (plant illustrations) organized into thirteen chapters based on medical disorders (Tucker, Arthur O.; Janick, Jules, 2020). Of these, 157 include inflorescences or fruits that aid botanical identification, while 28 show only vegetative structures; the roots tend toward stylization but rhizomes receive careful attention (Tucker, Arthur O.; Janick, Jules, 2020). Each plant is labeled with its Nahuatl name in red ink. The illustrations preserved in the modern editions descend from a 1933 set produced by Marie-Thérèse Vuillemin, whose uncle Eugene Tisserat itemized charges to William Gates that year for “185 flowers,” a count that anchors the modern phytomorph catalog (Tucker, Arthur O.; Janick, Jules, 2020).

The remedies cover a wide range of conditions. Head and eye complaints open the text, followed by internal ailments, joint pain, skin diseases, complex multi-ingredient preparations, and a concluding section that includes treatments for epilepsy, difficult labor, and conditions of travelers (Tucker, Arthur O.; Janick, Jules, 2020).

Cultural and Philosophical Context

The codex’s recipes presuppose a Nahua medical philosophy that the Latin translation does not explain. Lopez Austin’s reconstruction of that philosophy from the Codice Matritense, the Codice Florentino, and the Primeros Memoriales shows a body organized around three principal animistic entities: tonalli, teyolia, and ihiyotl (Lopez Austin, Alfredo, 1988) (Lopez Austin, Alfredo, 1988).

The teyolia, concentrated in the heart, was the central seat of consciousness; it left the body only at death and governed perception, memory, reason, will, and affect (Lopez Austin, Alfredo, 1988) (Lopez Austin, Alfredo, 1988). The Nahuatl word for heart, yollotli, is etymologically continuous with yol (life) and teyolia (the animistic entity of consciousness), so the heart’s ensoulment was built into the language itself rather than added as a metaphor (Lopez Austin, Alfredo, 1988). The Nahua anatomical text describes the heart as “round, hot, life-giver, life,” and characterizes its work in terms of ensoulment: “it gives life to people it makes people live it lives it throbs it leaps it beats my heart feels” (Lopez Austin, Alfredo, 1988).

The tonalli, by contrast, was a more diffuse force: solar warmth, daily heat, the calendrical day-sign of one’s birth, and an animistic substance that could leave the body in fright and re-enter through ritual care (Lopez Austin, Alfredo, 1988). The tonalli governed temperament and was the entity targeted by witchcraft, fright illness, and astonishment (Lopez Austin, Alfredo, 1988). The ihiyotl, concentrated in the liver and “linked to passion,” could be externalized by certain practitioners; after death it was called yohualecatl (“night air”), an entity capable of attacking the living and causing illness (Lopez Austin, Alfredo, 1988) (Lopez Austin, Alfredo, 1988) (Lopez Austin, Alfredo, 1988).

This three-entity model produced an etiology quite different from Galenic humoralism. Illness could arise from the displacement of an animistic entity (tonalli loss in fright), from sorcery (the teyolocuanime were sorcerers who “in an invisible form devoured the vital force of men’s hearts”) (Lopez Austin, Alfredo, 1988), or from ritual transgression: chahuacocoiztli was defined as illness “caused by forces emanating from people impure in sexual matters,” a contagion model independent of physical contact (Lopez Austin, Alfredo, 1988). Specific disease categories carried these assumptions on their face: atonahuiztli, “aquatic fevers,” were understood to “originate in the cold, watery underworld” and were treated with named plants including Bouvardia erecta and Tradescantia disgrega (Lopez Austin, Alfredo, 1988). Epilepsy was associated specifically with disturbance of the teyolia, expressed through Nahuatl terms meaning “swooning from pressure by the heart-soul” and “fainting from the heart-soul,” locating seizure in animistic disorder rather than in the brain (Lopez Austin, Alfredo, 1988). Blood (eztli) was called “our budding, our growing, our living,” not a fluid carrying humors but the embodiment of life-process itself (Lopez Austin, Alfredo, 1988).

Diagnosis and timing were calendrical. The 260-day tonalpohualli was a “ritual and divinatory” cycle, and the tonalpouhqui who interpreted it were medical-divinatory specialists, not astronomers (Lopez Austin, Alfredo, 1988). The codex’s recipes, presented in Latin to a Spanish patron, do not name these structures. They presuppose them.

Therapeutic Practices

The remedies reveal a sophisticated pharmaceutical system. Treatments rarely involve a single plant; most combine multiple botanical ingredients with minerals, gemstones, and animal products in precise preparations. The Aztec practitioners distinguished between conditions requiring hot and cold applications: for headache, the same herbal mixture ground in hot water treated cold-type head pain, while the same mixture in cold water addressed heat-type pain, suggesting a dual-quality diagnostic framework (Tucker, Arthur O.; Janick, Jules, 2020).

Wound care protocols were systematic. For head boils, plant roots were ground with egg yolk and applied topically, with accompanying instructions for wound cleaning and head covering (Tucker, Arthur O.; Janick, Jules, 2020). Eye disease received surgical-herbal treatment: the glaucoma remedy at folio 12r prescribes piercing a fleshy growth with a needle, cleansing the site, and then applying sundried ground plant roots in a combined surgical and botanical protocol (Tucker, Arthur O.; Janick, Jules, 2020). The alopecia and dandruff remedy drew on an unusually broad range of animal bile sources (dog, fox, mole, hawk, swallow, waterfowl, and quail) combined with plant saps and fermented beverage, with a behavioral instruction prohibiting midday sleep (Tucker, Arthur O.; Janick, Jules, 2020). The insomnia treatment combined plant medicines with body anointing, swallow bile, and topical forehead applications, integrating behavioral and topical routes in a single protocol (Tucker, Arthur O.; Janick, Jules, 2020). Skin conditions received complex mineral-plant preparations combining animal fat with ochre, other pigments, and specific plant ingredients (Tucker, Arthur O.; Janick, Jules, 2020). The dental-pain remedy at folio 17v combined cactus root, two named gemstones, flour, and salt with white incense fumes delivered through a cotton wad, mixing ritual mineral and aromatic elements with botanical drugs (Tucker, Arthur O.; Janick, Jules, 2020). The hiccup remedy warmed the chest with incense fumes channeled through cotton while simultaneously administering a cooked herbal potion with honey and anointing the chest externally (Tucker, Arthur O.; Janick, Jules, 2020). The scrofula treatment applied a poultice ground with stones taken from swallow intestines and the bird’s own blood, combining internal animal-derived minerals with tissue-specific animal products (Tucker, Arthur O.; Janick, Jules, 2020). The bloody-sputum remedy at folio 20r assembled at least fourteen ingredients, including plant parts, gemstones, monkey bone, river-bank stones, white incense, and egg whites, in a single compound formula for systemic illness (Tucker, Arthur O.; Janick, Jules, 2020).

Multi-route administration was standard. The dysentery remedy at folio 31r prescribed both oral dosing and rectal clyster delivery of the same compound preparation, demonstrating Aztec familiarity with parallel routes for gastrointestinal disease (Tucker, Arthur O.; Janick, Jules, 2020). The chest-oppression remedy specified an emetic protocol: a single moderate dose of root decoction administered to induce vomiting, representing a targeted purgative approach to thoracic complaints (Tucker, Arthur O.; Janick, Jules, 2020). The gout remedy at folio 35v specifies that prepared plants be placed on an ant hill so they could be “urinated on by the ants,” a deliberate use of formic acid as a therapeutic agent (Tucker, Arthur O.; Janick, Jules, 2020). The foot-injury formula at folio 37r, the manuscript’s most elaborate, combines eleven plant species, three gemstones, ritual incense fumigation, and a follow-up seed treatment applied across successive days (Tucker, Arthur O.; Janick, Jules, 2020). Fatigue and lassitude were addressed with a foot-wash formula combining multiple herbs and gemstones, extending the Codex’s gemstone-pharmacology from oral compounds into topical wash preparations (Tucker, Arthur O.; Janick, Jules, 2020). Knee contraction received anointing with hawk blood combined with herbal compounds, one of several remedies in the codex that assigned specific animal species to particular therapeutic actions (Tucker, Arthur O.; Janick, Jules, 2020). The joint-disease remedy at folio 47r prescribes first pricking stiff joints with an eagle or lion bone before applying a herbal plaster, demonstrating a preparatory puncturing step consistent with the codex’s approach to the epilepsy treatment (Tucker, Arthur O.; Janick, Jules, 2020).

The epilepsy treatment at folio 51v illustrates the depth of these protocols: it combined stones from the intestines of multiple bird species, stag horn, incense, human hair, and plant decoctions in a sequential procedure that included induced vomiting, body puncturing at the moment of seizure, and fumigation (Tucker, Arthur O.; Janick, Jules, 2020). This represents a multi-stage neurological management protocol with no parallel in contemporary European herbals. Read against the Nahua framework, it is also internally coherent: the epileptic crisis is a teyolia disturbance (Lopez Austin, Alfredo, 1988), and the protocol’s emetic, surgical, and fumigatory steps act on multiple animistic registers simultaneously.

Obstetric care included a dedicated category of remedies. The Nahuatl term cihuapahtli (“woman-medicine”) identifies a distinct class of female-specific plant preparations, suggesting that Aztec botanical taxonomy included gender-specific therapeutic categories (Tucker, Arthur O.; Janick, Jules, 2020). The difficult-labor remedy at folio 57v prescribed cihuapahtli bark, gemstones, opossum tail, and multiple animal products administered by oral dosing, external anointing, and vaginal washing simultaneously (Tucker, Arthur O.; Janick, Jules, 2020). The codex distinguishes this intrapartum protocol from a separate antepartum abdominal-washing protocol at folio 58v, indicating that Aztec medicine treated prenatal and birth-stage care as distinct phases (Tucker, Arthur O.; Janick, Jules, 2020).

Several Nahuatl plant names encoded therapeutic action directly. Cihuapahtli (woman-medicine), cochizxihuitl (sleep herb), and tzopelicacococ (sweetness-spicy) all built clinical use into the noun, indicating that the pharmacological lexicon worked partly as a mnemonic taxonomy (Tucker, Arthur O.; Janick, Jules, 2020).

Botanical Identification

Modern identification of the codex’s plants has been contested since the manuscript’s rediscovery. The challenges are substantial: Nahuatl plant names are often generic (referring to multiple species), the illustrations are stylized, and some phytomorphs include symbolic rather than botanical elements (Tucker, Arthur O.; Janick, Jules, 2020). A further complication is that some phytomorphs appear to depict dried herbarium specimens reassembled incorrectly, with leaves from one species combined with flowers from another (Tucker, Arthur O.; Janick, Jules, 2020).

Tucker and Janick’s systematic study (2020) developed a seven-part identification framework for each plant (Nahuatl name, botanical description, previous identifications, putative identification, distribution, common names, and uses) with explicit reliability indicators for uncertain assignments (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020). Their work corrected many prior identifications, comparing results against three earlier sources (Clayton et al. 2009, Emmart 1940, Gates 1939) and finding morphological mismatches in a substantial proportion (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020). In several cases the prior literature had proposed species from entirely wrong continents or families (Tucker, Arthur O.; Janick, Jules, 2020). Where the Codex artists captured fine morphological detail, identification could be sharpened: the two Datura phytomorphs are distinguishable because one shows ten corolla teeth (D. inoxia) and the other five (D. stramonium) (Tucker, Arthur O.; Janick, Jules, 2020).

The pharmacological implications of correct identification are considerable. Several plants previously assigned to one genus were reassigned to species with well-documented bioactive compounds. Plants in the Solanaceae family, for instance, contain alkaloids with genuine analgesic and sedative properties, lending pharmacological plausibility to some of the codex’s neurological remedies (Tucker, Arthur O.; Janick, Jules, 2020). Mesosphaerum pectinatum, identified as the xoxouhcapahtli used for knee pain, is independently documented in modern phytochemistry as antiasthmatic, antibacterial, cytotoxic, emollient, and hemostatic (Tucker, Arthur O.; Janick, Jules, 2020). Psidium guajava, identified in the dysentery remedy at folio 31r, is one of the most confidently supported assignments and has continued use in traditional medicine for parasitic and gastrointestinal conditions (Tucker, Arthur O.; Janick, Jules, 2020).

Archaeological corroboration comes from the pre-Hispanic garden at the Tetzcutzingo Hill Complex in Mexico, where several Codex species (including Datura stramonium, Phaseolus coccineus, Salvia microphylla, and Lantana camara) survive in situ (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020). Many of the same plants are still in use in Mexican folk medicine, providing empirical continuity between pre-Columbian and contemporary practice (Tucker, Arthur O.; Janick, Jules, 2020). The Codex also contains plants now globally cultivated as ornamentals: Zinnia elegans (folio 38r6), now ubiquitous in European and American horticulture, was likely selected over millennia by Nahua growers before reaching Europe (Tucker, Arthur O.; Janick, Jules, 2020). The folio 38r section groups eight flower remedies together, suggesting that the Codex artists or compilers recognized a distinct category of ornamental or flower-specific medicines worth collecting in sequence (Tucker, Arthur O.; Janick, Jules, 2020). Capsicum annuum appears in the scabies remedy at folio 46r, identified by its small white-fruited cultivar form — an early record of chili pepper as a dermatological agent (Tucker, Arthur O.; Janick, Jules, 2020). The identification of Schizaea poeppigiana as texochitl yamanqui (folio 36v1) for knee contraction provides a case where the phytomorph’s green coloration signals optimal harvest timing, showing that maturity cues were built into the plant illustrations (Tucker, Arthur O.; Janick, Jules, 2020). Lantana camara, identified as piltzintecouhxochitl, carries the name of Piltzintecuhtli (the Aztec god of the rising sun, healing, and visions), suggesting that ritual association was sometimes built into the plant’s name (Tucker, Arthur O.; Janick, Jules, 2020). Castilla elastica (Mexican rubber tree) appears at folio 47v3; Sahagún’s account, quoted by Standley, records its use for hoarseness, abscesses, suppuration, and intestinal complaints (Tucker, Arthur O.; Janick, Jules, 2020). Prunus serotina var. salicifolia (capulín cherry), another Codex plant, is mentioned in Bernal Díaz del Castillo’s account of the 1521 siege of Mexico, where it served as one of the few foods available to the besieging Spaniards alongside corn and tunas (Tucker, Arthur O.; Janick, Jules, 2020).

Significance

The Codex Cruz-Badianus matters for several reasons. As the earliest American medical manuscript, it provides a window into pre-Columbian therapeutic practice that predates the systematic destruction of indigenous knowledge systems by colonial authorities. Its 185 entries represent only a fraction of Aztec pharmaceutical knowledge (Bernardino de Sahagún’s later Florentine Codex would document hundreds more plants), but it preserves specific formulations that later compilations often omitted (Tucker, Arthur O.; Janick, Jules, 2020).

The text also challenges the assumption that sophisticated pharmaceutical systems required written transmission in the European sense. The remedies recorded by Martin de la Cruz came from an oral tradition maintained by indigenous healers. Their complexity (multi-ingredient preparations with precise dosing schedules, route-specific administration, and condition-specific timing) demonstrates a level of therapeutic systematization independent of literacy.

Scholarly Assessment

Tucker and Janick’s 2020 reidentification project represents the most systematic modern reading of the Codex’s flora. Their seven-part identification framework, with explicit reliability indicators for each plant, replaces a century of overlapping and sometimes contradictory proposals: Clayton et al. (2009), Emmart (1940), and Gates (1939) frequently disagree, and the prior literature occasionally proposed species from entirely wrong continents or families (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020). The reassessment matters clinically as well as taxonomically: corrected identifications place several Codex remedies within plant families known to contain bioactive compounds, and others within species (such as Mesosphaerum pectinatum and Psidium guajava) whose modern pharmacology corroborates the indigenous indication (Tucker, Arthur O.; Janick, Jules, 2020) (Tucker, Arthur O.; Janick, Jules, 2020). Tucker and Janick’s interpretation positions the manuscript as both a botanically reliable document and a record of a working pharmaceutical tradition, against earlier readings that treated the phytomorphs as too stylized for serious identification.

Human Notes

See Also

• aztec-medicine
• mesoamerican-medicine
• nahuatl-pharmacopoeia
• florentine-codex
• bernardino-de-sahagun
• folk-medicine

Sources

Evidence compiled from Tucker & Janick, Flora of the Codex Cruz-Badianus (Springer, 2020) and Lopez Austin, The Human Body and Ideology: Concepts of the Ancient Nahuas, vol. 2 (University of Utah Press, 1988).

Editorial Notes

Gaps the encyclopaedia compiler flagged for future evidence work, collected from inline markers in the body and frontmatter.

Significance