Blackcurrant can damage both unopened and open flowers when the temperature falls below . The flowers at the base of the strig are more protected by the foliage and are less likely to be damaged. In midsummer the strigs of green fruit ripen to edible berries, very dark purple in colour, almost black, with glossy skins and persistent calyxes at the apex, each containing many seeds. An established bush can produce about 4.5 kilograms (10 pounds) of fruit each year. Plants from Northern Asia are sometimes distinguished as a separate variety, "Ribes nigrum" var. "sibiricum", of which "Ribes cyathiforme" is considered
Ribes colandina this species, where it is replaced by "R. viscosum". Ribes colandina Ribes colandina is a species of currant found only in Perú. "Ribes colandina" differs from "Ribes andicola" in uniformly dark red flowers (petals red, not orange-yellow as in "R. andicola"), black instead of yellow fruits and wider, more deeply lobed leaves. "Ribes colandina" is a dioecious shrub approximately tall; densely to moderately tomentose from simple, curly trichomes long and with scattered subsessile glands, especially on young shoots and the abaxial leaf surface. Its petiole is long, wide; its stipules well differentiated, united with the petiole for . Inflorescences are