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Key to families | Table of families and genera

This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.

Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

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 Mex; several ornamental, some source of drugs. (Hindu: ancient name) All species. TOXIC.

Key to Datura

1. Corolla 15–20 cm; calyx 8–12 cm, ribbed; seeds tan ..... D. wrightii

1' Corolla 4.5–16 cm; calyx 2–9 cm, angled or winged; seeds black or gray-brown

2. Fr nodding, prickles many, weak; stem gray-hairy ..... D. discolor

2' Fr erect, prickles few, stout; stem ± glabrous to sparsely hairy

3. Fr prickles 8–22 mm; calyx 2–2.5 cm ..... D. ferox

3' Fr prickles 3–10 mm; calyx 3.5–4.5 cm ..... D. stramonium

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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