Scientific name: Datura stramonium L.
Ameyaltepec: tla:pa:tl mora:doh
Oapan: tla:pa:tl mora:doh
San Juan Tetelcingo: tla:pa:tl mora:doh
Genus: Datura

Datura stramonium L. is commonly known in English as jimson-weed. It is an extremely ill-scented annual plant growing to 1 meter high. Its has coarse ovate long-stemmed leaves that are somewhat smooth, around 15 cm long and with sharply pointed and widely spaced teeth or lobes.

The flowers of Datura stramonium L. are attractive and white or purplish. They develop singly in the forks of branching stems or leaf axils.  Tubularcalice erect, narrowly 5-winged and 5-toothed, deciduous but leaving a collar that eventually enlarges under the fruit.  Funnel-shaped corolla large for the size of the plant, around 8cm long, each of the 5 flaring lobes with a slender, projecting tooth. Ovary 4-chambered, giving rise to an erect, spiny, globular or egg-shaped capsule splitting into 4 valves at maturity.  Small, black, flattened, kidney-shaped seeds viable over many decades.

This species is probably native to Mexico, though it is now widespread as a weed and a colonizer of disturbed open areas in many tropical and temperate parts of the world.  In Mexico, it is found as a component of many different types of vegetation, including cultivated fields. Where common, as in Veracruz, it is sometimes gathered and sold in open markets as a herbal remedy. Of the 25 species of Datura, jimson-weed is the one that is best known, most widespread, and most widely used in medicine. All parts of the plant contain intensely poisonous alkaloids (atropine, hyoscyamine, scopolamine), considered sedative in small doses.