This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol3", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Annual, or rarely perennial, coarse branching or feebly climbing herbs, with 1-2-pinnately divided leaves, and lateral irregular raceme-like cymes of small yellowish flowers opposite the leaves. Calyx 5-parted, or rarely 6-parted, the segments linear or lanceolate. Corolla rotate, the tube very short, the limb 5-cleft or rarely 6-cleft, plicate. Stamens 5 (rarely 6), inserted on the throat of the corolla; filaments very short; anthers elongated, connate or connivent, introrsely longitudinally dehiscent. Ovary 2-3-celled; style simple; stigma small, capitate. Berry in the wild plants globose or pyriform, much modified in cultivation, the calyx persistent at its base. [Greek, wolf-peach.]
About 4 species, natives of North America, the following typical.
Viscid-pubescent, much branched, 1°-3° high, the branches spreading. Leaves peti-oled, pinnately divided, 6-18' long, the segments stalked, the larger 7-9, ovate or ovate-lanceolate, mostly acute, dentate, lobed or again divided, 2'-4' long, with several or numerous smaller, sometimes very small ones interspersed; clusters several-flowered; peduncles 1'-3' long; flowers 5"-8" broad; calyx-segments about equalling the corolla; berry the well-known tomato or love-apple.
Escaped from cultivation and occasionally spontaneous from New York and Pennsylvania southward. Jews' ear. June-Sept.