Jepson eFlora: Taxon page
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Datura stramonium

Higher Taxonomy
Family: SolanaceaeView DescriptionDichotomous Key

Habit: Annual to shrub. Leaf: generally simple, generally alternate, generally petioled; stipules 0; blade entire to deeply lobed. Inflorescence: various. Flower: bisexual; calyx lobes generally 5; corolla +- radial, cylindric to rotate, lobes generally 5; stamens 5, on corolla tube, alternate lobes; ovary superior, generally 2-chambered, style 1. Fruit: berry, loculicidal or septicidal capsule, [(drupe)], 2--5-chambered.
Genera In Family: 75 genera, 3000 species: worldwide, especially +- tropics; many alien weeds in California; many cultivated for food, drugs, or ornamental (potato, tomato, peppers, tobacco, petunia). Toxicity: many TOXIC. Note: Nicandra physalodes (L.) Gaertn. is a waif.
eFlora Treatment Author: Michael H. Nee
Scientific Editor: Thomas J. Rosatti.
Genus: DaturaView DescriptionDichotomous Key

Common Name: JIMSON WEED
Habit: Annual to subshrub, hairs +- 0 or simple, ill-smelling. Leaf: entire to deeply lobed. Inflorescence: flowers 1 in branch forks. Flower: calyx circumscissile near base, leaving +- rotate collar in fruit; corolla funnel-shaped, white or +- purple, lobes 5(10); stamens attached below tube middle; ovary 2- or 4-chambered. Fruit: capsule, leathery or woody, prickly; valves 2--4 or irregular. Seed: +- flat, black, brown, gray-brown, or tan.
Species In Genus: +- 13 species: warm regions, especially Mexico; several ornamental, some source of drugs. Etymology: (Hindu: ancient name) Toxicity: All species. TOXIC.

Datura stramonium L.
Habit: Annual < 10 dm. Stem: +- glabrous to sparsely hairy. Leaf: 5--15 cm, 4--10 cm wide, ovate, coarsely toothed to shallowly lobed. Flower: erect; calyx 3.5--4.5 cm, angled toward base, lobes 5--7 mm; corolla 6--9 cm, glabrous, white or pale blue-purple, lobes 8--10 mm, spreading, tips long, narrow; filaments 22--25 mm, anthers 3.5--5 mm; style 4--6 cm. Fruit: 4-valved, erect, 25--35 mm wide, glabrous; prickles 3--10 mm, upper > lower. Seed: 3--3.5 mm, black. Chromosomes: n=12.
Ecology: Sandy soils, open, often disturbed areas; Elevation: < 1500 m. Bioregional Distribution: CA-FP (exc CaR, SNH), MP; Distribution Outside California: to eastern United States; native to Mexico. Flowering Time: Jun--Aug
Synonyms: Datura stramonium var. tatula (L.) Torr.
eFlora Treatment Author: Michael H. Nee
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Citation for this treatment: Michael H. Nee 2017. Datura stramonium, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 23, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on July 23, 2017.

Datura stramonium
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© 2013 Neal Kramer
Datura stramonium
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© 2013 Neal Kramer
Datura stramonium var. stramonium
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© 2006 George W. Hartwell
Datura stramonium
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© 2013 California Academy of Sciences
Datura stramonium
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© 2013 Neal Kramer
Datura stramonium
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© 2013 Neal Kramer

More photos of Datura stramonium in CalPhotos

Geographic subdivisions for Datura stramonium:
CA-FP (exc CaR, SNH), MP;
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.