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SOLANACEAE NIGHTSHADE FAMILY

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

DATURA JIMSON WEED
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.
NATURALIZED
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, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 1 2014
Citation for this treatment: [Author of taxon treatment] 2013. Datura, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=22387, accessed on Sep 1 2014

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click for enlargement Datura stramonium
See CalPhotos for additional images
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.
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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.