Redcurrant in Europe, Asia and North America, also with edible fruit. These include "Ribes spicatum" (northern Europe and northern Asia), "Ribes alpinum" (northern Europe), "R. schlechtendalii" (northeast Europe), "R. multiflorum" (southeast Europe), "R. petraeum" (southwest Europe) and "R. triste" (North America; Newfoundland to Alaska and southward in mountains). While "Ribes rubrum" and "R. nigrum" are native to northern and eastern Europe, large berried cultivars of the redcurrant were first produced in Belgium and northern France in the 17th century. In modern times, numerous cultivars have been selected; some of these have escaped gardens and can be found in the wild across
Solanum nigrum to make 16-DPA progenitor); a possible commercial source could be via cultivating the hairy roots of this plant. Black nightshade is cultivated as a food crop on several continents, including Africa and North America. The leaves of cultivated strains are eaten after cooking. A garden form with fruit diam. is occasionally cultivated. Black nightshade can be a serious agricultural weed when it competes with crops. It has been reported as a weed in 61 countries and 37 crops. Herbicides are used extensively to control it in field crops such as cotton. Solanum nigrum Solanum nigrum (European black nightshade) is a