This section is from the book "A Manual Of Weeds", by Ada E. Georgia. Also available from Amazon: A Manual Of Weeds.
Introduced. Annual. Propagates by seeds.
Time of bloom: July to September.
Seed-time: September to December.
Range: New England to Florida, westward to Ohio.
Habitat: Roadsides and waste places.
Escaped from gardens, where it was cultivated for its beauty, but a dangerous stray in the highways. Stems four to eight feet tall, stout, much branched, finely glandular-hairy. Leaves four to ten inches long, broadly ovate, acute, inequilateral, entire or sometimes slightly wavy-edged, covered with fine, glandular hairs which give the surface a soft, velvety look. Flowers white, the trumpet-shaped corolla often six or seven inches long, the flaring lips three or four inches across; calyx tubular, five-lobed, smooth, and glandular-hairy. "Apple" globular, about an inch and a half in diameter, both hairy and prickly. This plant is quite as poisonous as the two preceding species and should be as promptly suppressed when out of the bounds of cultivation.