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 lasianthum inflorescence is an erect raceme of two to four flowers, each less than a centimeters long. The flower has five yellow sepals which are reflexed away from the central corolla, a neat tube of yellow petals. Within the tube are five stamens and two styles. The fruit is a hairless red berry measuring 6 to 7 millimeters wide. Ribes lasianthum Ribes lasianthum is a species of currant known by the common names alpine gooseberry and woolly-flowered gooseberry. It is native to California, where it can be found in the San Gabriel Mountains and the Sierra Nevada, its distribution extending just