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 speciosum Ribes speciosum Ribes speciosum is a species of flowering plant in the Grossulariaceae family, which includes the edible currants and gooseberries. It is a spiny deciduous shrub with spring-flowering, elongate red flowers that resemble fuchsias, though it is not closely related. Its common names are fuchsia-flowered gooseberry and Californian fuchsia. It is native to central and southern California and Baja California, where it grows in the scrub and chaparral of the coastal mountain ranges. "Ribes speciosum" is a spreading shrub which can reach in maximum height, its stems coated in bristles with three long spines at each stem node. The