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 tularense and hairy, toothed leaves. The flowers are greenish white and the fruits are yellow and bristly. Ribes tularense Ribes tularense is a rare species of currant known as the Sequoia gooseberry or Tulare gooseberry. It is endemic to southern California, at elevations between . "Ribes tularense" is known from only about ten populations in the forests of the High Sierra Nevada. These are located in Tulare County except for one population found less than 100 meters east of the county line near Mount Whitney in Inyo County. The species is closely related to "Ribes binominatum". "Ribes tularense" is a low,