Eastern black nightshade
August 7, 2015
Solanum ptycanthum Dun.
Erect, branching summer annual.
Seedlings have small, egg-shaped cotyledons with a pointed tip and a purplish tinge underneath followed by alternate, petiolated, simple leaves. First leaves are generally smooth, egg-shaped with wavy margins and a purplish tinge underneath; later leaves are slightly hairy, egg- to diamond-shaped with smooth to irregularly toothed margins.
Erect and branching, up to 3-foot-tall stems with few hairs.
Flowers and fruit
Flowers are white to purple-tinged, star-shaped with five petals fused at the base surrounding five bright yellow anthers; found in downward facing clusters. Berries are glossy black at maturity and globe-shaped, and contain up to 110 seeds.
All plant parts are toxic to animals.
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