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Key to families | Table of families and genera

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 Mexico; 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. Fruit nodding, prickles many, weak; stem gray-hairy ..... D. discolor

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

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

3' Fruit 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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