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Key to families | Table of families and genera

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Michael H. Nee

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.
75 genera, 3000 species: worldwide, especially ± tropics; many alien weeds in California; many cultivated for food, drugs, or ornamental (potato, tomato, peppers, tobacco, petunia); many TOXIC. [Hunziker 2001 Genera Solanacearum. Koeltz Scientific Books] Nicandra physalodes (L.) Gaertn. is a waif. —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Hunziker 2001 Genera Solanacearum: The Genera of Solanaceae Illustrated, Arranged According to a New System by A.T. Hunziker. Koeltz Scientific Books, Königstein, Germany]

Key to Solanaceae

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.
± 13 species: warm regions, especially Mexico; several ornamental, some source of drugs. (Hindu: ancient name) All species. TOXIC.

Key to Datura

D. stramonium L.
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.
n=12. Sandy soils, open, often disturbed areas; < 1500 m. California Floristic Province (except Cascade Range, High Sierra Nevada), Modoc Plateau; to eastern United States; native to Mexico. Jun–Aug [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora,, accessed on Mar 28 2015
Citation for this treatment: [Author of taxon treatment] 2013. Datura, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on Mar 28 2015

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click for enlargement Datura stramonium
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2004 Dr. Amadej Trnkoczy

Geographic subdivisions indicated for the distribution of Datura stramonium Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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).

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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.