Materia Medica

Tonka Bean (Dipteryx odorata) — Coumara Nut, Cumaru

September 29, 2026

Tonka bean is the intensely fragrant seed of the South American tree Dipteryx odorata and one of the original natural sources of coumarin. This guide reviews its botany, fragrance and traditional uses, explains human coumarin hepatotoxicity, and states the U.S. food restriction accurately: foods containing added coumarin from tonka beans or tonka extract are deemed adulterated.

September 29, 2026

Tormentil, Potentilla erecta, is a tannin-rich European rhizome traditionally used for mild diarrhea and minor inflammation of the mouth. This guide separates it from creeping cinquefoil and North American bloodroot, reviews EMA-recognized traditional use, modern human and laboratory research, safety, identification and sustainable rhizome sourcing.

September 29, 2026

Vanilla is the cured fruit of a climbing tropical orchid, not simply the flavor molecule vanillin. This guide covers Vanilla planifolia identity, pollination, curing, aroma chemistry, culinary use, traditional medicine, extract standards, allergy and occupational sensitivity, and conservation.

September 29, 2026

Vetiver is a deep-rooted tropical grass valued for its aromatic roots, earthy essential oil, traditional cooling uses, perfumery, soil stabilization and environmental applications. This guide covers current taxonomy, root chemistry, essential-oil production, traditional medicine, research limits, fragrance safety, growing and sustainable harvest.

September 29, 2026

Eastern wahoo is a native North American shrub or small tree with striking pink-red fruit and a place in historical American materia medica. Because all parts can be poisonous if ingested and may cause gastrointestinal and cardiac effects, this article focuses on identification, history, ecology and safety rather than home dosing.

September 29, 2026

White mulberry is both an edible fruit tree and the source of mulberry-leaf teas and extracts used in East Asian food and herbal traditions. This guide separates fruit, leaf, root bark and standardized extracts, reviews the best human evidence for post-meal glucose effects, and covers medication, allergy and invasive-species cautions.

September 29, 2026

Wild carrot, or Queen Anne’s lace, is the wild form of the species complex that gave rise to cultivated carrot. Its food and folk-medicine history must be balanced against a serious identification hazard: deadly poison hemlock and water hemlock can grow in similar habitats. This guide emphasizes multi-feature identification, historical use and safety.

September 29, 2026

Wild cherry bark comes from the North American black cherry, Prunus serotina, whose dried bark has a long cough-syrup tradition. This guide separates medicinal bark from edible pitted fruit and from cyanogenic pits, leaves and twigs, while reviewing the limited modern human evidence and important safety issues.

September 29, 2026

Wild ginger is a native eastern North American woodland groundcover with a long ethnobotanical history, but it is not true culinary ginger. Because Asarum species are associated with aristolochic-acid exposure and serious kidney and cancer risks, this guide focuses on identification, history, ecology and safety rather than internal dosing.

September 29, 2026

Wild indigo, Baptisia tinctoria, is a yellow-flowered eastern North American perennial with dye, ethnobotanical and historic Eclectic-medicine uses. This guide separates that history from modern evidence, explains quinolizidine-alkaloid safety, and clarifies why common-cold research on multi-herb combinations does not prove Baptisia works alone.

September 29, 2026

Wild lettuce, Lactuca virosa, has a long European history as a bitter sedative and analgesic herb whose dried milky latex was called lactucarium or “lettuce opium.” This guide explains why that nickname is misleading, reviews lactucin and lactucopicrin research, documented human toxicity, identification, and safety without providing home extraction or dosing instructions.

September 29, 2026

Wild yam, Dioscorea villosa, is a native North American medicinal vine whose rhizome contains steroidal saponins including diosgenin. This guide explains its traditional use, the pharmaceutical history of diosgenin, the persistent but incorrect “natural progesterone” claim, menopause research, identification, sourcing and safety.