Datura innoxia
Datura stramonium
angel's-trumpet, downy thorn-apple, Indian-apple, pricklyburr
datura, devil's apple or weed, jimson-weed, thorn-apple
usually villous-pubescent, sometimes glabrous.
sometimes purple, sparsely puberulent, glabrescent.
blades ovate, to 22 × 16 cm, margins entire or irregularly sinuate-dentate, surfaces villous to glabrescent, (trichomes spreading, often more dense along veins, sometimes glandular).
blades broadly ovate, to 22 × 12 cm, margins coarsely sinuate-dentate, surfaces glabrescent.
calyx villous along veins, hairs spreading, tube cylindric, 5-toothed;
corolla white, sometimes lavender- or purple-tinged, funnelform, 10–22 cm, sparsely hairy, glabrescent, acuminate lobes alternating with lobules of similar size.
calyx hairy along veins, tube cylindric, 5-toothed;
corolla usually white, sometimes purplish, trumpet-shaped, (5–)6–11 cm, acuminate lobes alternating with sinuses.
pendent, irregularly dehiscent, pericarp fleshy, hairy, with prickles 10 mm;
calyx remnant slightly accrescent.
erect, dehiscent by 4 valves, pericarp dry, glabrous or hairy, with prickles ± equal, to 15 mm;
calyx remnant not accrescent.
brown, 4–6 mm, convex marginal ridge present, testa smooth;
caruncle present.
black, 3–4 mm, convex marginal ridge absent, testa rugose;
caruncle absent.
= 24.
= 24.
Datura innoxia
Datura stramonium
Datura innoxia is native to Texas and possibly New Mexico. Elsewhere in the flora area, it is widely introduced as an ornamental and, inadvertently, as a weed.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Although a weed found throughout the world, Datura stramonium is probably native to central and southern Mexico and accompanied the expansion of Mesoamerican agriculture. Based upon a revised interpretation of ancient Latin and Greek texts, A. Touwaide (1998) argued that it was known in the Old World prior to the discovery of the New World in 1492. The delirious consequences of the British soldiers’ consumption of young leaves at Jamestown, Virginia, in 1676 led to the application of the common name of jimsonweed to D. stramonium (R. Beverley 1705).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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